3 * Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
4 * 2006 Edgard Lima <edgard.lima@gmail.com>
6 * gstv4l2object.c: base class for V4L2 elements
8 * This library is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU Library General Public License as published
10 * by the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version. This library is distributed in the hope
12 * that it will be useful, but WITHOUT ANY WARRANTY; without even the
13 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
14 * PURPOSE. See the GNU Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,
30 #include <sys/ioctl.h>
34 #include <gudev/gudev.h>
37 #include "ext/videodev2.h"
38 #include "gstv4l2object.h"
39 #include "gstv4l2tuner.h"
40 #include "gstv4l2colorbalance.h"
42 #include "gst/gst-i18n-plugin.h"
44 #include <gst/video/video.h>
45 #include <gst/allocators/gstdmabuf.h>
47 GST_DEBUG_CATEGORY_EXTERN (v4l2_debug);
48 #define GST_CAT_DEFAULT v4l2_debug
50 #define DEFAULT_PROP_DEVICE_NAME NULL
51 #define DEFAULT_PROP_DEVICE_FD -1
52 #define DEFAULT_PROP_FLAGS 0
53 #define DEFAULT_PROP_TV_NORM 0
54 #define DEFAULT_PROP_IO_MODE GST_V4L2_IO_AUTO
56 #define ENCODED_BUFFER_SIZE (2 * 1024 * 1024)
61 V4L2_STD_OBJECT_PROPS,
65 * common format / caps utilities:
69 GST_V4L2_RAW = 1 << 0,
70 GST_V4L2_CODEC = 1 << 1,
71 GST_V4L2_TRANSPORT = 1 << 2,
72 GST_V4L2_NO_PARSE = 1 << 3,
80 GstV4L2FormatFlags flags;
83 static const GstV4L2FormatDesc gst_v4l2_formats[] = {
85 {V4L2_PIX_FMT_RGB332, TRUE, GST_V4L2_RAW},
86 {V4L2_PIX_FMT_ARGB555, TRUE, GST_V4L2_RAW},
87 {V4L2_PIX_FMT_XRGB555, TRUE, GST_V4L2_RAW},
88 {V4L2_PIX_FMT_ARGB555X, TRUE, GST_V4L2_RAW},
89 {V4L2_PIX_FMT_XRGB555X, TRUE, GST_V4L2_RAW},
90 {V4L2_PIX_FMT_RGB565, TRUE, GST_V4L2_RAW},
91 {V4L2_PIX_FMT_RGB565X, TRUE, GST_V4L2_RAW},
92 {V4L2_PIX_FMT_BGR666, TRUE, GST_V4L2_RAW},
93 {V4L2_PIX_FMT_BGR24, TRUE, GST_V4L2_RAW},
94 {V4L2_PIX_FMT_RGB24, TRUE, GST_V4L2_RAW},
95 {V4L2_PIX_FMT_ABGR32, TRUE, GST_V4L2_RAW},
96 {V4L2_PIX_FMT_XBGR32, TRUE, GST_V4L2_RAW},
97 {V4L2_PIX_FMT_BGRA32, TRUE, GST_V4L2_RAW},
98 {V4L2_PIX_FMT_BGRX32, TRUE, GST_V4L2_RAW},
99 {V4L2_PIX_FMT_RGBA32, TRUE, GST_V4L2_RAW},
100 {V4L2_PIX_FMT_RGBX32, TRUE, GST_V4L2_RAW},
101 {V4L2_PIX_FMT_ARGB32, TRUE, GST_V4L2_RAW},
102 {V4L2_PIX_FMT_XRGB32, TRUE, GST_V4L2_RAW},
104 /* Deprecated Packed RGB Image Formats (alpha ambiguity) */
105 {V4L2_PIX_FMT_RGB444, TRUE, GST_V4L2_RAW},
106 {V4L2_PIX_FMT_RGB555, TRUE, GST_V4L2_RAW},
107 {V4L2_PIX_FMT_RGB555X, TRUE, GST_V4L2_RAW},
108 {V4L2_PIX_FMT_BGR32, TRUE, GST_V4L2_RAW},
109 {V4L2_PIX_FMT_RGB32, TRUE, GST_V4L2_RAW},
112 {V4L2_PIX_FMT_GREY, TRUE, GST_V4L2_RAW},
113 {V4L2_PIX_FMT_Y4, TRUE, GST_V4L2_RAW},
114 {V4L2_PIX_FMT_Y6, TRUE, GST_V4L2_RAW},
115 {V4L2_PIX_FMT_Y10, TRUE, GST_V4L2_RAW},
116 {V4L2_PIX_FMT_Y12, TRUE, GST_V4L2_RAW},
117 {V4L2_PIX_FMT_Y16, TRUE, GST_V4L2_RAW},
118 {V4L2_PIX_FMT_Y16_BE, TRUE, GST_V4L2_RAW},
119 {V4L2_PIX_FMT_Y10BPACK, TRUE, GST_V4L2_RAW},
121 /* Palette formats */
122 {V4L2_PIX_FMT_PAL8, TRUE, GST_V4L2_RAW},
124 /* Chrominance formats */
125 {V4L2_PIX_FMT_UV8, TRUE, GST_V4L2_RAW},
127 /* Luminance+Chrominance formats */
128 {V4L2_PIX_FMT_YVU410, TRUE, GST_V4L2_RAW},
129 {V4L2_PIX_FMT_YVU420, TRUE, GST_V4L2_RAW},
130 {V4L2_PIX_FMT_YVU420M, TRUE, GST_V4L2_RAW},
131 {V4L2_PIX_FMT_YUYV, TRUE, GST_V4L2_RAW},
132 {V4L2_PIX_FMT_YYUV, TRUE, GST_V4L2_RAW},
133 {V4L2_PIX_FMT_YVYU, TRUE, GST_V4L2_RAW},
134 {V4L2_PIX_FMT_UYVY, TRUE, GST_V4L2_RAW},
135 {V4L2_PIX_FMT_VYUY, TRUE, GST_V4L2_RAW},
136 {V4L2_PIX_FMT_YUV422P, TRUE, GST_V4L2_RAW},
137 {V4L2_PIX_FMT_YUV411P, TRUE, GST_V4L2_RAW},
138 {V4L2_PIX_FMT_Y41P, TRUE, GST_V4L2_RAW},
139 {V4L2_PIX_FMT_YUV444, TRUE, GST_V4L2_RAW},
140 {V4L2_PIX_FMT_YUV555, TRUE, GST_V4L2_RAW},
141 {V4L2_PIX_FMT_YUV565, TRUE, GST_V4L2_RAW},
142 {V4L2_PIX_FMT_YUV32, TRUE, GST_V4L2_RAW},
143 {V4L2_PIX_FMT_YUV410, TRUE, GST_V4L2_RAW},
144 {V4L2_PIX_FMT_YUV420, TRUE, GST_V4L2_RAW},
145 {V4L2_PIX_FMT_YUV420M, TRUE, GST_V4L2_RAW},
146 {V4L2_PIX_FMT_HI240, TRUE, GST_V4L2_RAW},
147 {V4L2_PIX_FMT_HM12, TRUE, GST_V4L2_RAW},
148 {V4L2_PIX_FMT_M420, TRUE, GST_V4L2_RAW},
150 /* two planes -- one Y, one Cr + Cb interleaved */
151 {V4L2_PIX_FMT_NV12, TRUE, GST_V4L2_RAW},
152 {V4L2_PIX_FMT_NV12M, TRUE, GST_V4L2_RAW},
153 {V4L2_PIX_FMT_NV12MT, TRUE, GST_V4L2_RAW},
154 {V4L2_PIX_FMT_NV12MT_16X16, TRUE, GST_V4L2_RAW},
155 {V4L2_PIX_FMT_NV21, TRUE, GST_V4L2_RAW},
156 {V4L2_PIX_FMT_NV21M, TRUE, GST_V4L2_RAW},
157 {V4L2_PIX_FMT_NV16, TRUE, GST_V4L2_RAW},
158 {V4L2_PIX_FMT_NV16M, TRUE, GST_V4L2_RAW},
159 {V4L2_PIX_FMT_NV61, TRUE, GST_V4L2_RAW},
160 {V4L2_PIX_FMT_NV61M, TRUE, GST_V4L2_RAW},
161 {V4L2_PIX_FMT_NV24, TRUE, GST_V4L2_RAW},
162 {V4L2_PIX_FMT_NV42, TRUE, GST_V4L2_RAW},
163 {V4L2_PIX_FMT_MM21, TRUE, GST_V4L2_RAW},
165 /* Bayer formats - see http://www.siliconimaging.com/RGB%20Bayer.htm */
166 {V4L2_PIX_FMT_SBGGR8, TRUE, GST_V4L2_RAW},
167 {V4L2_PIX_FMT_SGBRG8, TRUE, GST_V4L2_RAW},
168 {V4L2_PIX_FMT_SGRBG8, TRUE, GST_V4L2_RAW},
169 {V4L2_PIX_FMT_SRGGB8, TRUE, GST_V4L2_RAW},
171 /* compressed formats */
172 {V4L2_PIX_FMT_MJPEG, FALSE, GST_V4L2_CODEC},
173 {V4L2_PIX_FMT_JPEG, FALSE, GST_V4L2_CODEC},
174 {V4L2_PIX_FMT_PJPG, FALSE, GST_V4L2_CODEC},
175 {V4L2_PIX_FMT_DV, FALSE, GST_V4L2_TRANSPORT},
176 {V4L2_PIX_FMT_MPEG, FALSE, GST_V4L2_TRANSPORT},
177 {V4L2_PIX_FMT_FWHT, FALSE, GST_V4L2_CODEC},
178 {V4L2_PIX_FMT_H264, FALSE, GST_V4L2_CODEC},
179 {V4L2_PIX_FMT_H264_NO_SC, FALSE, GST_V4L2_CODEC},
180 {V4L2_PIX_FMT_H264_MVC, FALSE, GST_V4L2_CODEC},
181 {V4L2_PIX_FMT_HEVC, FALSE, GST_V4L2_CODEC},
182 {V4L2_PIX_FMT_H263, FALSE, GST_V4L2_CODEC},
183 {V4L2_PIX_FMT_MPEG1, FALSE, GST_V4L2_CODEC},
184 {V4L2_PIX_FMT_MPEG2, FALSE, GST_V4L2_CODEC},
185 {V4L2_PIX_FMT_MPEG4, FALSE, GST_V4L2_CODEC},
186 {V4L2_PIX_FMT_XVID, FALSE, GST_V4L2_CODEC},
187 {V4L2_PIX_FMT_VC1_ANNEX_G, FALSE, GST_V4L2_CODEC},
188 {V4L2_PIX_FMT_VC1_ANNEX_L, FALSE, GST_V4L2_CODEC},
189 {V4L2_PIX_FMT_VP8, FALSE, GST_V4L2_CODEC | GST_V4L2_NO_PARSE},
190 {V4L2_PIX_FMT_VP9, FALSE, GST_V4L2_CODEC | GST_V4L2_NO_PARSE},
192 /* Vendor-specific formats */
193 {V4L2_PIX_FMT_WNVA, TRUE, GST_V4L2_CODEC},
194 {V4L2_PIX_FMT_SN9C10X, TRUE, GST_V4L2_CODEC},
195 {V4L2_PIX_FMT_PWC1, TRUE, GST_V4L2_CODEC},
196 {V4L2_PIX_FMT_PWC2, TRUE, GST_V4L2_CODEC},
199 #define GST_V4L2_FORMAT_COUNT (G_N_ELEMENTS (gst_v4l2_formats))
201 static GSList *gst_v4l2_object_get_format_list (GstV4l2Object * v4l2object);
204 #define GST_TYPE_V4L2_DEVICE_FLAGS (gst_v4l2_device_get_type ())
206 gst_v4l2_device_get_type (void)
208 static GType v4l2_device_type = 0;
210 if (v4l2_device_type == 0) {
211 static const GFlagsValue values[] = {
212 {V4L2_CAP_VIDEO_CAPTURE, "Device supports video capture", "capture"},
213 {V4L2_CAP_VIDEO_OUTPUT, "Device supports video playback", "output"},
214 {V4L2_CAP_VIDEO_OVERLAY, "Device supports video overlay", "overlay"},
216 {V4L2_CAP_VBI_CAPTURE, "Device supports the VBI capture", "vbi-capture"},
217 {V4L2_CAP_VBI_OUTPUT, "Device supports the VBI output", "vbi-output"},
219 {V4L2_CAP_TUNER, "Device has a tuner or modulator", "tuner"},
220 {V4L2_CAP_AUDIO, "Device has audio inputs or outputs", "audio"},
226 g_flags_register_static ("GstV4l2DeviceTypeFlags", values);
229 return v4l2_device_type;
232 #define GST_TYPE_V4L2_TV_NORM (gst_v4l2_tv_norm_get_type ())
234 gst_v4l2_tv_norm_get_type (void)
236 static GType v4l2_tv_norm = 0;
239 static const GEnumValue tv_norms[] = {
242 {V4L2_STD_NTSC, "NTSC", "NTSC"},
243 {V4L2_STD_NTSC_M, "NTSC-M", "NTSC-M"},
244 {V4L2_STD_NTSC_M_JP, "NTSC-M-JP", "NTSC-M-JP"},
245 {V4L2_STD_NTSC_M_KR, "NTSC-M-KR", "NTSC-M-KR"},
246 {V4L2_STD_NTSC_443, "NTSC-443", "NTSC-443"},
248 {V4L2_STD_PAL, "PAL", "PAL"},
249 {V4L2_STD_PAL_BG, "PAL-BG", "PAL-BG"},
250 {V4L2_STD_PAL_B, "PAL-B", "PAL-B"},
251 {V4L2_STD_PAL_B1, "PAL-B1", "PAL-B1"},
252 {V4L2_STD_PAL_G, "PAL-G", "PAL-G"},
253 {V4L2_STD_PAL_H, "PAL-H", "PAL-H"},
254 {V4L2_STD_PAL_I, "PAL-I", "PAL-I"},
255 {V4L2_STD_PAL_DK, "PAL-DK", "PAL-DK"},
256 {V4L2_STD_PAL_D, "PAL-D", "PAL-D"},
257 {V4L2_STD_PAL_D1, "PAL-D1", "PAL-D1"},
258 {V4L2_STD_PAL_K, "PAL-K", "PAL-K"},
259 {V4L2_STD_PAL_M, "PAL-M", "PAL-M"},
260 {V4L2_STD_PAL_N, "PAL-N", "PAL-N"},
261 {V4L2_STD_PAL_Nc, "PAL-Nc", "PAL-Nc"},
262 {V4L2_STD_PAL_60, "PAL-60", "PAL-60"},
264 {V4L2_STD_SECAM, "SECAM", "SECAM"},
265 {V4L2_STD_SECAM_B, "SECAM-B", "SECAM-B"},
266 {V4L2_STD_SECAM_G, "SECAM-G", "SECAM-G"},
267 {V4L2_STD_SECAM_H, "SECAM-H", "SECAM-H"},
268 {V4L2_STD_SECAM_DK, "SECAM-DK", "SECAM-DK"},
269 {V4L2_STD_SECAM_D, "SECAM-D", "SECAM-D"},
270 {V4L2_STD_SECAM_K, "SECAM-K", "SECAM-K"},
271 {V4L2_STD_SECAM_K1, "SECAM-K1", "SECAM-K1"},
272 {V4L2_STD_SECAM_L, "SECAM-L", "SECAM-L"},
273 {V4L2_STD_SECAM_LC, "SECAM-Lc", "SECAM-Lc"},
278 v4l2_tv_norm = g_enum_register_static ("V4L2_TV_norms", tv_norms);
285 gst_v4l2_io_mode_get_type (void)
287 static GType v4l2_io_mode = 0;
290 static const GEnumValue io_modes[] = {
291 {GST_V4L2_IO_AUTO, "GST_V4L2_IO_AUTO", "auto"},
292 {GST_V4L2_IO_RW, "GST_V4L2_IO_RW", "rw"},
293 {GST_V4L2_IO_MMAP, "GST_V4L2_IO_MMAP", "mmap"},
294 {GST_V4L2_IO_USERPTR, "GST_V4L2_IO_USERPTR", "userptr"},
295 {GST_V4L2_IO_DMABUF, "GST_V4L2_IO_DMABUF", "dmabuf"},
296 {GST_V4L2_IO_DMABUF_IMPORT, "GST_V4L2_IO_DMABUF_IMPORT",
301 v4l2_io_mode = g_enum_register_static ("GstV4l2IOMode", io_modes);
307 gst_v4l2_object_install_properties_helper (GObjectClass * gobject_class,
308 const char *default_device)
310 g_object_class_install_property (gobject_class, PROP_DEVICE,
311 g_param_spec_string ("device", "Device", "Device location",
312 default_device, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
313 g_object_class_install_property (gobject_class, PROP_DEVICE_NAME,
314 g_param_spec_string ("device-name", "Device name",
315 "Name of the device", DEFAULT_PROP_DEVICE_NAME,
316 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
317 g_object_class_install_property (gobject_class, PROP_DEVICE_FD,
318 g_param_spec_int ("device-fd", "File descriptor",
319 "File descriptor of the device", -1, G_MAXINT, DEFAULT_PROP_DEVICE_FD,
320 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
321 g_object_class_install_property (gobject_class, PROP_FLAGS,
322 g_param_spec_flags ("flags", "Flags", "Device type flags",
323 GST_TYPE_V4L2_DEVICE_FLAGS, DEFAULT_PROP_FLAGS,
324 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
327 * GstV4l2Src:brightness:
329 * Picture brightness, or more precisely, the black level
331 g_object_class_install_property (gobject_class, PROP_BRIGHTNESS,
332 g_param_spec_int ("brightness", "Brightness",
333 "Picture brightness, or more precisely, the black level", G_MININT,
335 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
337 * GstV4l2Src:contrast:
339 * Picture contrast or luma gain
341 g_object_class_install_property (gobject_class, PROP_CONTRAST,
342 g_param_spec_int ("contrast", "Contrast",
343 "Picture contrast or luma gain", G_MININT,
345 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
347 * GstV4l2Src:saturation:
349 * Picture color saturation or chroma gain
351 g_object_class_install_property (gobject_class, PROP_SATURATION,
352 g_param_spec_int ("saturation", "Saturation",
353 "Picture color saturation or chroma gain", G_MININT,
355 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
359 * Hue or color balance
361 g_object_class_install_property (gobject_class, PROP_HUE,
362 g_param_spec_int ("hue", "Hue",
363 "Hue or color balance", G_MININT,
365 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
372 g_object_class_install_property (gobject_class, PROP_TV_NORM,
373 g_param_spec_enum ("norm", "TV norm",
375 GST_TYPE_V4L2_TV_NORM, DEFAULT_PROP_TV_NORM,
376 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
379 * GstV4l2Src:io-mode:
383 g_object_class_install_property (gobject_class, PROP_IO_MODE,
384 g_param_spec_enum ("io-mode", "IO mode",
386 GST_TYPE_V4L2_IO_MODE, DEFAULT_PROP_IO_MODE,
387 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
390 * GstV4l2Src:extra-controls:
392 * Additional v4l2 controls for the device. The controls are identified
393 * by the control name (lowercase with '_' for any non-alphanumeric
398 g_object_class_install_property (gobject_class, PROP_EXTRA_CONTROLS,
399 g_param_spec_boxed ("extra-controls", "Extra Controls",
400 "Extra v4l2 controls (CIDs) for the device",
401 GST_TYPE_STRUCTURE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
404 * GstV4l2Src:pixel-aspect-ratio:
406 * The pixel aspect ratio of the device. This overwrites the pixel aspect
407 * ratio queried from the device.
411 g_object_class_install_property (gobject_class, PROP_PIXEL_ASPECT_RATIO,
412 g_param_spec_string ("pixel-aspect-ratio", "Pixel Aspect Ratio",
413 "Overwrite the pixel aspect ratio of the device", "1/1",
414 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
417 * GstV4l2Src:force-aspect-ratio:
419 * When enabled, the pixel aspect ratio queried from the device or set
420 * with the pixel-aspect-ratio property will be enforced.
424 g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO,
425 g_param_spec_boolean ("force-aspect-ratio", "Force aspect ratio",
426 "When enabled, the pixel aspect ratio will be enforced", TRUE,
427 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
429 gst_type_mark_as_plugin_api (GST_TYPE_V4L2_DEVICE_FLAGS, 0);
430 gst_type_mark_as_plugin_api (GST_TYPE_V4L2_TV_NORM, 0);
431 gst_type_mark_as_plugin_api (GST_TYPE_V4L2_IO_MODE, 0);
435 gst_v4l2_object_install_m2m_properties_helper (GObjectClass * gobject_class)
437 g_object_class_install_property (gobject_class, PROP_DEVICE,
438 g_param_spec_string ("device", "Device", "Device location",
439 NULL, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
441 g_object_class_install_property (gobject_class, PROP_DEVICE_NAME,
442 g_param_spec_string ("device-name", "Device name",
443 "Name of the device", DEFAULT_PROP_DEVICE_NAME,
444 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
446 g_object_class_install_property (gobject_class, PROP_DEVICE_FD,
447 g_param_spec_int ("device-fd", "File descriptor",
448 "File descriptor of the device", -1, G_MAXINT, DEFAULT_PROP_DEVICE_FD,
449 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
451 g_object_class_install_property (gobject_class, PROP_OUTPUT_IO_MODE,
452 g_param_spec_enum ("output-io-mode", "Output IO mode",
453 "Output side I/O mode (matches sink pad)",
454 GST_TYPE_V4L2_IO_MODE, DEFAULT_PROP_IO_MODE,
455 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
457 g_object_class_install_property (gobject_class, PROP_CAPTURE_IO_MODE,
458 g_param_spec_enum ("capture-io-mode", "Capture IO mode",
459 "Capture I/O mode (matches src pad)",
460 GST_TYPE_V4L2_IO_MODE, DEFAULT_PROP_IO_MODE,
461 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
463 g_object_class_install_property (gobject_class, PROP_EXTRA_CONTROLS,
464 g_param_spec_boxed ("extra-controls", "Extra Controls",
465 "Extra v4l2 controls (CIDs) for the device",
466 GST_TYPE_STRUCTURE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
469 /* Support for 32bit off_t, this wrapper is casting off_t to gint64 */
474 v4l2_mmap_wrapper (gpointer start, gsize length, gint prot, gint flags, gint fd,
477 return v4l2_mmap (start, length, prot, flags, fd, (gint64) offset);
480 #define v4l2_mmap v4l2_mmap_wrapper
482 #endif /* SIZEOF_OFF_T < 8 */
483 #endif /* HAVE_LIBV4L2 */
486 gst_v4l2_object_new (GstElement * element,
487 GstObject * debug_object,
488 enum v4l2_buf_type type,
489 const char *default_device,
490 GstV4l2GetInOutFunction get_in_out_func,
491 GstV4l2SetInOutFunction set_in_out_func,
492 GstV4l2UpdateFpsFunction update_fps_func)
494 GstV4l2Object *v4l2object;
497 * some default values
499 v4l2object = g_new0 (GstV4l2Object, 1);
501 v4l2object->type = type;
502 v4l2object->formats = NULL;
504 v4l2object->element = element;
505 v4l2object->dbg_obj = debug_object;
506 v4l2object->get_in_out_func = get_in_out_func;
507 v4l2object->set_in_out_func = set_in_out_func;
508 v4l2object->update_fps_func = update_fps_func;
510 v4l2object->video_fd = -1;
511 v4l2object->active = FALSE;
512 v4l2object->videodev = g_strdup (default_device);
514 v4l2object->norms = NULL;
515 v4l2object->channels = NULL;
516 v4l2object->colors = NULL;
518 v4l2object->keep_aspect = TRUE;
520 v4l2object->n_v4l2_planes = 0;
522 v4l2object->no_initial_format = FALSE;
524 /* We now disable libv4l2 by default, but have an env to enable it. */
526 if (g_getenv ("GST_V4L2_USE_LIBV4L2")) {
527 v4l2object->fd_open = v4l2_fd_open;
528 v4l2object->close = v4l2_close;
529 v4l2object->dup = v4l2_dup;
530 v4l2object->ioctl = v4l2_ioctl;
531 v4l2object->read = v4l2_read;
532 v4l2object->mmap = v4l2_mmap;
533 v4l2object->munmap = v4l2_munmap;
537 v4l2object->fd_open = NULL;
538 v4l2object->close = close;
539 v4l2object->dup = dup;
540 v4l2object->ioctl = ioctl;
541 v4l2object->read = read;
542 v4l2object->mmap = mmap;
543 v4l2object->munmap = munmap;
550 gst_v4l2_object_destroy (GstV4l2Object * v4l2object)
552 g_return_if_fail (v4l2object != NULL);
554 g_free (v4l2object->videodev);
555 g_free (v4l2object->par);
556 g_free (v4l2object->channel);
558 if (v4l2object->formats) {
559 gst_v4l2_object_clear_format_list (v4l2object);
562 if (v4l2object->probed_caps) {
563 gst_caps_unref (v4l2object->probed_caps);
566 if (v4l2object->extra_controls) {
567 gst_structure_free (v4l2object->extra_controls);
575 gst_v4l2_object_clear_format_list (GstV4l2Object * v4l2object)
577 g_slist_foreach (v4l2object->formats, (GFunc) g_free, NULL);
578 g_slist_free (v4l2object->formats);
579 v4l2object->formats = NULL;
585 gst_v4l2_object_prop_to_cid (guint prop_id)
590 case PROP_BRIGHTNESS:
591 cid = V4L2_CID_BRIGHTNESS;
594 cid = V4L2_CID_CONTRAST;
596 case PROP_SATURATION:
597 cid = V4L2_CID_SATURATION;
603 GST_WARNING ("unmapped property id: %d", prop_id);
610 gst_v4l2_object_set_property_helper (GstV4l2Object * v4l2object,
611 guint prop_id, const GValue * value, GParamSpec * pspec)
615 g_free (v4l2object->videodev);
616 v4l2object->videodev = g_value_dup_string (value);
618 case PROP_BRIGHTNESS:
620 case PROP_SATURATION:
623 gint cid = gst_v4l2_object_prop_to_cid (prop_id);
626 if (GST_V4L2_IS_OPEN (v4l2object)) {
627 gst_v4l2_set_attribute (v4l2object, cid, g_value_get_int (value));
634 v4l2object->tv_norm = g_value_get_enum (value);
638 if (GST_V4L2_IS_OPEN (v4l2object)) {
639 GstTuner *tuner = GST_TUNER (v4l2object->element);
640 GstTunerChannel *channel = gst_tuner_find_channel_by_name (tuner,
641 (gchar *) g_value_get_string (value));
644 /* like gst_tuner_set_channel (tuner, channel)
645 without g_object_notify */
646 gst_v4l2_tuner_set_channel (v4l2object, channel);
649 g_free (v4l2object->channel);
650 v4l2object->channel = g_value_dup_string (value);
654 if (GST_V4L2_IS_OPEN (v4l2object)) {
655 GstTuner *tuner = GST_TUNER (v4l2object->element);
656 GstTunerChannel *channel = gst_tuner_get_channel (tuner);
659 GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
661 gst_tuner_set_frequency (tuner, channel, g_value_get_ulong (value))
662 without g_object_notify */
663 gst_v4l2_tuner_set_frequency (v4l2object, channel,
664 g_value_get_ulong (value));
667 v4l2object->frequency = g_value_get_ulong (value);
673 v4l2object->req_mode = g_value_get_enum (value);
675 case PROP_CAPTURE_IO_MODE:
676 g_return_val_if_fail (!V4L2_TYPE_IS_OUTPUT (v4l2object->type), FALSE);
677 v4l2object->req_mode = g_value_get_enum (value);
679 case PROP_OUTPUT_IO_MODE:
680 g_return_val_if_fail (V4L2_TYPE_IS_OUTPUT (v4l2object->type), FALSE);
681 v4l2object->req_mode = g_value_get_enum (value);
683 case PROP_EXTRA_CONTROLS:{
684 const GstStructure *s = gst_value_get_structure (value);
686 if (v4l2object->extra_controls)
687 gst_structure_free (v4l2object->extra_controls);
689 v4l2object->extra_controls = s ? gst_structure_copy (s) : NULL;
690 if (GST_V4L2_IS_OPEN (v4l2object))
691 gst_v4l2_set_controls (v4l2object, v4l2object->extra_controls);
694 case PROP_PIXEL_ASPECT_RATIO:
695 if (v4l2object->par) {
696 g_value_unset (v4l2object->par);
697 g_free (v4l2object->par);
699 v4l2object->par = g_new0 (GValue, 1);
700 g_value_init (v4l2object->par, GST_TYPE_FRACTION);
701 if (!g_value_transform (value, v4l2object->par)) {
702 g_warning ("Could not transform string to aspect ratio");
703 gst_value_set_fraction (v4l2object->par, 1, 1);
706 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "set PAR to %d/%d",
707 gst_value_get_fraction_numerator (v4l2object->par),
708 gst_value_get_fraction_denominator (v4l2object->par));
710 case PROP_FORCE_ASPECT_RATIO:
711 v4l2object->keep_aspect = g_value_get_boolean (value);
722 gst_v4l2_object_get_property_helper (GstV4l2Object * v4l2object,
723 guint prop_id, GValue * value, GParamSpec * pspec)
727 g_value_set_string (value, v4l2object->videodev);
729 case PROP_DEVICE_NAME:
731 const guchar *name = NULL;
733 if (GST_V4L2_IS_OPEN (v4l2object))
734 name = v4l2object->vcap.card;
736 g_value_set_string (value, (gchar *) name);
741 if (GST_V4L2_IS_OPEN (v4l2object))
742 g_value_set_int (value, v4l2object->video_fd);
744 g_value_set_int (value, DEFAULT_PROP_DEVICE_FD);
751 if (GST_V4L2_IS_OPEN (v4l2object)) {
752 flags |= v4l2object->device_caps &
753 (V4L2_CAP_VIDEO_CAPTURE |
754 V4L2_CAP_VIDEO_OUTPUT |
755 V4L2_CAP_VIDEO_OVERLAY |
756 V4L2_CAP_VBI_CAPTURE |
757 V4L2_CAP_VBI_OUTPUT | V4L2_CAP_TUNER | V4L2_CAP_AUDIO);
759 if (v4l2object->device_caps & V4L2_CAP_VIDEO_CAPTURE_MPLANE)
760 flags |= V4L2_CAP_VIDEO_CAPTURE;
762 if (v4l2object->device_caps & V4L2_CAP_VIDEO_OUTPUT_MPLANE)
763 flags |= V4L2_CAP_VIDEO_OUTPUT;
765 g_value_set_flags (value, flags);
768 case PROP_BRIGHTNESS:
770 case PROP_SATURATION:
773 gint cid = gst_v4l2_object_prop_to_cid (prop_id);
776 if (GST_V4L2_IS_OPEN (v4l2object)) {
778 if (gst_v4l2_get_attribute (v4l2object, cid, &v)) {
779 g_value_set_int (value, v);
787 g_value_set_enum (value, v4l2object->tv_norm);
790 g_value_set_enum (value, v4l2object->req_mode);
792 case PROP_CAPTURE_IO_MODE:
793 g_return_val_if_fail (!V4L2_TYPE_IS_OUTPUT (v4l2object->type), FALSE);
794 g_value_set_enum (value, v4l2object->req_mode);
796 case PROP_OUTPUT_IO_MODE:
797 g_return_val_if_fail (V4L2_TYPE_IS_OUTPUT (v4l2object->type), FALSE);
798 g_value_set_enum (value, v4l2object->req_mode);
800 case PROP_EXTRA_CONTROLS:
801 gst_value_set_structure (value, v4l2object->extra_controls);
803 case PROP_PIXEL_ASPECT_RATIO:
805 g_value_transform (v4l2object->par, value);
807 case PROP_FORCE_ASPECT_RATIO:
808 g_value_set_boolean (value, v4l2object->keep_aspect);
818 gst_v4l2_get_driver_min_buffers (GstV4l2Object * v4l2object)
820 struct v4l2_control control = { 0, };
822 g_return_if_fail (GST_V4L2_IS_OPEN (v4l2object));
824 if (V4L2_TYPE_IS_OUTPUT (v4l2object->type))
825 control.id = V4L2_CID_MIN_BUFFERS_FOR_OUTPUT;
827 control.id = V4L2_CID_MIN_BUFFERS_FOR_CAPTURE;
829 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) == 0) {
830 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
831 "driver requires a minimum of %d buffers", control.value);
832 v4l2object->min_buffers = control.value;
834 v4l2object->min_buffers = 0;
839 gst_v4l2_set_defaults (GstV4l2Object * v4l2object)
841 GstTunerNorm *norm = NULL;
842 GstTunerChannel *channel = NULL;
845 if (!GST_IS_TUNER (v4l2object->element))
848 tuner = GST_TUNER (v4l2object->element);
850 if (v4l2object->tv_norm)
851 norm = gst_v4l2_tuner_get_norm_by_std_id (v4l2object, v4l2object->tv_norm);
852 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "tv_norm=0x%" G_GINT64_MODIFIER "x, "
853 "norm=%p", (guint64) v4l2object->tv_norm, norm);
855 gst_tuner_set_norm (tuner, norm);
858 GST_TUNER_NORM (gst_tuner_get_norm (GST_TUNER (v4l2object->element)));
860 v4l2object->tv_norm =
861 gst_v4l2_tuner_get_std_id_by_norm (v4l2object, norm);
862 gst_tuner_norm_changed (tuner, norm);
866 if (v4l2object->channel)
867 channel = gst_tuner_find_channel_by_name (tuner, v4l2object->channel);
869 gst_tuner_set_channel (tuner, channel);
872 GST_TUNER_CHANNEL (gst_tuner_get_channel (GST_TUNER
873 (v4l2object->element)));
875 g_free (v4l2object->channel);
876 v4l2object->channel = g_strdup (channel->label);
877 gst_tuner_channel_changed (tuner, channel);
882 && GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
883 if (v4l2object->frequency != 0) {
884 gst_tuner_set_frequency (tuner, channel, v4l2object->frequency);
886 v4l2object->frequency = gst_tuner_get_frequency (tuner, channel);
887 if (v4l2object->frequency == 0) {
889 gst_tuner_set_frequency (tuner, channel, 1000);
897 gst_v4l2_object_open (GstV4l2Object * v4l2object, GstV4l2Error * error)
899 if (gst_v4l2_open (v4l2object, error))
900 gst_v4l2_set_defaults (v4l2object);
908 gst_v4l2_object_open_shared (GstV4l2Object * v4l2object, GstV4l2Object * other)
912 ret = gst_v4l2_dup (v4l2object, other);
918 gst_v4l2_object_close (GstV4l2Object * v4l2object)
920 if (!gst_v4l2_close (v4l2object))
923 gst_caps_replace (&v4l2object->probed_caps, NULL);
925 /* reset our copy of the device caps */
926 v4l2object->device_caps = 0;
928 if (v4l2object->formats) {
929 gst_v4l2_object_clear_format_list (v4l2object);
932 if (v4l2object->par) {
933 g_value_unset (v4l2object->par);
934 g_free (v4l2object->par);
935 v4l2object->par = NULL;
938 if (v4l2object->channel) {
939 g_free (v4l2object->channel);
940 v4l2object->channel = NULL;
946 static struct v4l2_fmtdesc *
947 gst_v4l2_object_get_format_from_fourcc (GstV4l2Object * v4l2object,
950 struct v4l2_fmtdesc *fmt;
956 walk = gst_v4l2_object_get_format_list (v4l2object);
958 fmt = (struct v4l2_fmtdesc *) walk->data;
959 if (fmt->pixelformat == fourcc)
961 /* special case for jpeg */
962 if (fmt->pixelformat == V4L2_PIX_FMT_MJPEG ||
963 fmt->pixelformat == V4L2_PIX_FMT_JPEG ||
964 fmt->pixelformat == V4L2_PIX_FMT_PJPG) {
965 if (fourcc == V4L2_PIX_FMT_JPEG || fourcc == V4L2_PIX_FMT_MJPEG ||
966 fourcc == V4L2_PIX_FMT_PJPG) {
970 walk = g_slist_next (walk);
978 /* complete made up ranking, the values themselves are meaningless */
979 /* These ranks MUST be X such that X<<15 fits on a signed int - see
980 the comment at the end of gst_v4l2_object_format_get_rank. */
981 #define YUV_BASE_RANK 1000
982 #define JPEG_BASE_RANK 500
983 #define DV_BASE_RANK 200
984 #define RGB_BASE_RANK 100
985 #define YUV_ODD_BASE_RANK 50
986 #define RGB_ODD_BASE_RANK 25
987 #define BAYER_BASE_RANK 15
988 #define S910_BASE_RANK 10
989 #define GREY_BASE_RANK 5
990 #define PWC_BASE_RANK 1
993 gst_v4l2_object_format_get_rank (const struct v4l2_fmtdesc *fmt)
995 guint32 fourcc = fmt->pixelformat;
996 gboolean emulated = ((fmt->flags & V4L2_FMT_FLAG_EMULATED) != 0);
1000 case V4L2_PIX_FMT_MJPEG:
1001 case V4L2_PIX_FMT_PJPG:
1002 rank = JPEG_BASE_RANK;
1004 case V4L2_PIX_FMT_JPEG:
1005 rank = JPEG_BASE_RANK + 1;
1007 case V4L2_PIX_FMT_MPEG: /* MPEG */
1008 rank = JPEG_BASE_RANK + 2;
1011 case V4L2_PIX_FMT_RGB332:
1012 case V4L2_PIX_FMT_ARGB555:
1013 case V4L2_PIX_FMT_XRGB555:
1014 case V4L2_PIX_FMT_RGB555:
1015 case V4L2_PIX_FMT_ARGB555X:
1016 case V4L2_PIX_FMT_XRGB555X:
1017 case V4L2_PIX_FMT_RGB555X:
1018 case V4L2_PIX_FMT_BGR666:
1019 case V4L2_PIX_FMT_RGB565:
1020 case V4L2_PIX_FMT_RGB565X:
1021 case V4L2_PIX_FMT_RGB444:
1022 case V4L2_PIX_FMT_Y4:
1023 case V4L2_PIX_FMT_Y6:
1024 case V4L2_PIX_FMT_Y10:
1025 case V4L2_PIX_FMT_Y12:
1026 case V4L2_PIX_FMT_Y10BPACK:
1027 case V4L2_PIX_FMT_YUV555:
1028 case V4L2_PIX_FMT_YUV565:
1029 case V4L2_PIX_FMT_YUV32:
1030 case V4L2_PIX_FMT_NV12MT_16X16:
1031 case V4L2_PIX_FMT_NV42:
1032 case V4L2_PIX_FMT_H264_MVC:
1033 rank = RGB_ODD_BASE_RANK;
1036 case V4L2_PIX_FMT_RGB24:
1037 case V4L2_PIX_FMT_BGR24:
1038 rank = RGB_BASE_RANK - 1;
1041 case V4L2_PIX_FMT_RGB32:
1042 case V4L2_PIX_FMT_BGR32:
1043 case V4L2_PIX_FMT_ABGR32:
1044 case V4L2_PIX_FMT_XBGR32:
1045 case V4L2_PIX_FMT_BGRA32:
1046 case V4L2_PIX_FMT_BGRX32:
1047 case V4L2_PIX_FMT_RGBA32:
1048 case V4L2_PIX_FMT_RGBX32:
1049 case V4L2_PIX_FMT_ARGB32:
1050 case V4L2_PIX_FMT_XRGB32:
1051 rank = RGB_BASE_RANK;
1054 case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
1055 rank = GREY_BASE_RANK;
1058 case V4L2_PIX_FMT_NV12MT: /* NV12 64x32 tile */
1059 case V4L2_PIX_FMT_NV21: /* 12 Y/CrCb 4:2:0 */
1060 case V4L2_PIX_FMT_NV21M: /* Same as NV21 */
1061 case V4L2_PIX_FMT_YYUV: /* 16 YUV 4:2:2 */
1062 case V4L2_PIX_FMT_HI240: /* 8 8-bit color */
1063 case V4L2_PIX_FMT_NV16: /* 16 Y/CbCr 4:2:2 */
1064 case V4L2_PIX_FMT_NV16M: /* Same as NV16 */
1065 case V4L2_PIX_FMT_NV61: /* 16 Y/CrCb 4:2:2 */
1066 case V4L2_PIX_FMT_NV61M: /* Same as NV61 */
1067 case V4L2_PIX_FMT_NV24: /* 24 Y/CrCb 4:4:4 */
1068 case V4L2_PIX_FMT_MM21: /* NV12 Y 16x32, UV 16x16 tile */
1069 rank = YUV_ODD_BASE_RANK;
1072 case V4L2_PIX_FMT_YVU410: /* YVU9, 9 bits per pixel */
1073 rank = YUV_BASE_RANK + 3;
1075 case V4L2_PIX_FMT_YUV410: /* YUV9, 9 bits per pixel */
1076 rank = YUV_BASE_RANK + 2;
1078 case V4L2_PIX_FMT_YUV420: /* I420, 12 bits per pixel */
1079 case V4L2_PIX_FMT_YUV420M:
1080 rank = YUV_BASE_RANK + 7;
1082 case V4L2_PIX_FMT_NV12: /* Y/CbCr 4:2:0, 12 bits per pixel */
1083 case V4L2_PIX_FMT_NV12M: /* Same as NV12 */
1084 rank = YUV_BASE_RANK + 8;
1086 case V4L2_PIX_FMT_YUYV: /* YUY2, 16 bits per pixel */
1087 rank = YUV_BASE_RANK + 10;
1089 case V4L2_PIX_FMT_YVU420: /* YV12, 12 bits per pixel */
1090 rank = YUV_BASE_RANK + 6;
1092 case V4L2_PIX_FMT_UYVY: /* UYVY, 16 bits per pixel */
1093 rank = YUV_BASE_RANK + 9;
1095 case V4L2_PIX_FMT_YUV444:
1096 rank = YUV_BASE_RANK + 6;
1098 case V4L2_PIX_FMT_Y41P: /* Y41P, 12 bits per pixel */
1099 rank = YUV_BASE_RANK + 5;
1101 case V4L2_PIX_FMT_YUV411P: /* Y41B, 12 bits per pixel */
1102 rank = YUV_BASE_RANK + 4;
1104 case V4L2_PIX_FMT_YUV422P: /* Y42B, 16 bits per pixel */
1105 rank = YUV_BASE_RANK + 8;
1108 case V4L2_PIX_FMT_DV:
1109 rank = DV_BASE_RANK;
1112 case V4L2_PIX_FMT_WNVA: /* Winnov hw compress */
1116 case V4L2_PIX_FMT_SBGGR8:
1117 case V4L2_PIX_FMT_SGBRG8:
1118 case V4L2_PIX_FMT_SGRBG8:
1119 case V4L2_PIX_FMT_SRGGB8:
1120 rank = BAYER_BASE_RANK;
1123 case V4L2_PIX_FMT_SN9C10X:
1124 rank = S910_BASE_RANK;
1127 case V4L2_PIX_FMT_PWC1:
1128 rank = PWC_BASE_RANK;
1130 case V4L2_PIX_FMT_PWC2:
1131 rank = PWC_BASE_RANK;
1139 /* All ranks are below 1<<15 so a shift by 15
1140 * will a) make all non-emulated formats larger
1141 * than emulated and b) will not overflow
1152 format_cmp_func (gconstpointer a, gconstpointer b)
1154 const struct v4l2_fmtdesc *fa = a;
1155 const struct v4l2_fmtdesc *fb = b;
1157 if (fa->pixelformat == fb->pixelformat)
1160 return gst_v4l2_object_format_get_rank (fb) -
1161 gst_v4l2_object_format_get_rank (fa);
1164 /******************************************************
1165 * gst_v4l2_object_fill_format_list():
1166 * create list of supported capture formats
1167 * return value: TRUE on success, FALSE on error
1168 ******************************************************/
1170 gst_v4l2_object_fill_format_list (GstV4l2Object * v4l2object,
1171 enum v4l2_buf_type type)
1174 struct v4l2_fmtdesc *format;
1176 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "getting src format enumerations");
1178 /* format enumeration */
1180 format = g_new0 (struct v4l2_fmtdesc, 1);
1183 format->type = type;
1185 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_ENUM_FMT, format) < 0) {
1186 if (errno == EINVAL) {
1188 break; /* end of enumeration */
1194 GST_LOG_OBJECT (v4l2object->dbg_obj, "index: %u", format->index);
1195 GST_LOG_OBJECT (v4l2object->dbg_obj, "type: %d", format->type);
1196 GST_LOG_OBJECT (v4l2object->dbg_obj, "flags: %08x", format->flags);
1197 GST_LOG_OBJECT (v4l2object->dbg_obj, "description: '%s'",
1198 format->description);
1199 GST_LOG_OBJECT (v4l2object->dbg_obj, "pixelformat: %" GST_FOURCC_FORMAT,
1200 GST_FOURCC_ARGS (format->pixelformat));
1202 /* sort formats according to our preference; we do this, because caps
1203 * are probed in the order the formats are in the list, and the order of
1204 * formats in the final probed caps matters for things like fixation */
1205 v4l2object->formats = g_slist_insert_sorted (v4l2object->formats, format,
1206 (GCompareFunc) format_cmp_func);
1209 #ifndef GST_DISABLE_GST_DEBUG
1213 GST_INFO_OBJECT (v4l2object->dbg_obj, "got %d format(s):", n);
1214 for (l = v4l2object->formats; l != NULL; l = l->next) {
1217 GST_INFO_OBJECT (v4l2object->dbg_obj,
1218 " %" GST_FOURCC_FORMAT "%s", GST_FOURCC_ARGS (format->pixelformat),
1219 ((format->flags & V4L2_FMT_FLAG_EMULATED)) ? " (emulated)" : "");
1231 if (v4l2object->element)
1234 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
1235 (_("Failed to enumerate possible video formats device '%s' can work "
1236 "with"), v4l2object->videodev),
1237 ("Failed to get number %d in pixelformat enumeration for %s. (%d - %s)",
1238 n, v4l2object->videodev, errno, g_strerror (errno)));
1245 * Get the list of supported capture formats, a list of
1246 * `struct v4l2_fmtdesc`.
1249 gst_v4l2_object_get_format_list (GstV4l2Object * v4l2object)
1251 if (!v4l2object->formats) {
1253 /* check usual way */
1254 gst_v4l2_object_fill_format_list (v4l2object, v4l2object->type);
1256 /* if our driver supports multi-planar
1257 * and if formats are still empty then we can workaround driver bug
1258 * by also looking up formats as if our device was not supporting
1260 if (!v4l2object->formats) {
1261 switch (v4l2object->type) {
1262 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1263 gst_v4l2_object_fill_format_list (v4l2object,
1264 V4L2_BUF_TYPE_VIDEO_CAPTURE);
1267 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1268 gst_v4l2_object_fill_format_list (v4l2object,
1269 V4L2_BUF_TYPE_VIDEO_OUTPUT);
1277 return v4l2object->formats;
1280 static GstVideoFormat
1281 gst_v4l2_object_v4l2fourcc_to_video_format (guint32 fourcc)
1283 GstVideoFormat format;
1286 case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
1287 format = GST_VIDEO_FORMAT_GRAY8;
1289 case V4L2_PIX_FMT_Y16:
1290 format = GST_VIDEO_FORMAT_GRAY16_LE;
1292 case V4L2_PIX_FMT_Y16_BE:
1293 format = GST_VIDEO_FORMAT_GRAY16_BE;
1295 case V4L2_PIX_FMT_XRGB555:
1296 case V4L2_PIX_FMT_RGB555:
1297 format = GST_VIDEO_FORMAT_RGB15;
1299 case V4L2_PIX_FMT_XRGB555X:
1300 case V4L2_PIX_FMT_RGB555X:
1301 format = GST_VIDEO_FORMAT_BGR15;
1303 case V4L2_PIX_FMT_RGB565:
1304 format = GST_VIDEO_FORMAT_RGB16;
1306 case V4L2_PIX_FMT_RGB24:
1307 format = GST_VIDEO_FORMAT_RGB;
1309 case V4L2_PIX_FMT_BGR24:
1310 format = GST_VIDEO_FORMAT_BGR;
1312 case V4L2_PIX_FMT_XRGB32:
1313 case V4L2_PIX_FMT_RGB32:
1314 format = GST_VIDEO_FORMAT_xRGB;
1316 case V4L2_PIX_FMT_RGBX32:
1317 format = GST_VIDEO_FORMAT_RGBx;
1319 case V4L2_PIX_FMT_XBGR32:
1320 case V4L2_PIX_FMT_BGR32:
1321 format = GST_VIDEO_FORMAT_BGRx;
1323 case V4L2_PIX_FMT_BGRX32:
1324 format = GST_VIDEO_FORMAT_xBGR;
1326 case V4L2_PIX_FMT_ABGR32:
1327 format = GST_VIDEO_FORMAT_BGRA;
1329 case V4L2_PIX_FMT_BGRA32:
1330 format = GST_VIDEO_FORMAT_ABGR;
1332 case V4L2_PIX_FMT_RGBA32:
1333 format = GST_VIDEO_FORMAT_RGBA;
1335 case V4L2_PIX_FMT_ARGB32:
1336 format = GST_VIDEO_FORMAT_ARGB;
1338 case V4L2_PIX_FMT_NV12:
1339 case V4L2_PIX_FMT_NV12M:
1340 format = GST_VIDEO_FORMAT_NV12;
1342 case V4L2_PIX_FMT_NV12MT:
1343 format = GST_VIDEO_FORMAT_NV12_64Z32;
1345 case V4L2_PIX_FMT_MM21:
1346 format = GST_VIDEO_FORMAT_NV12_16L32S;
1348 case V4L2_PIX_FMT_NV21:
1349 case V4L2_PIX_FMT_NV21M:
1350 format = GST_VIDEO_FORMAT_NV21;
1352 case V4L2_PIX_FMT_YVU410:
1353 format = GST_VIDEO_FORMAT_YVU9;
1355 case V4L2_PIX_FMT_YUV410:
1356 format = GST_VIDEO_FORMAT_YUV9;
1358 case V4L2_PIX_FMT_YUV420:
1359 case V4L2_PIX_FMT_YUV420M:
1360 format = GST_VIDEO_FORMAT_I420;
1362 case V4L2_PIX_FMT_YUYV:
1363 format = GST_VIDEO_FORMAT_YUY2;
1365 case V4L2_PIX_FMT_YVU420:
1366 format = GST_VIDEO_FORMAT_YV12;
1368 case V4L2_PIX_FMT_UYVY:
1369 format = GST_VIDEO_FORMAT_UYVY;
1371 case V4L2_PIX_FMT_YUV411P:
1372 format = GST_VIDEO_FORMAT_Y41B;
1374 case V4L2_PIX_FMT_YUV422P:
1375 format = GST_VIDEO_FORMAT_Y42B;
1377 case V4L2_PIX_FMT_YVYU:
1378 format = GST_VIDEO_FORMAT_YVYU;
1380 case V4L2_PIX_FMT_NV16:
1381 case V4L2_PIX_FMT_NV16M:
1382 format = GST_VIDEO_FORMAT_NV16;
1384 case V4L2_PIX_FMT_NV61:
1385 case V4L2_PIX_FMT_NV61M:
1386 format = GST_VIDEO_FORMAT_NV61;
1388 case V4L2_PIX_FMT_NV24:
1389 format = GST_VIDEO_FORMAT_NV24;
1392 format = GST_VIDEO_FORMAT_UNKNOWN;
1400 gst_v4l2_object_v4l2fourcc_is_rgb (guint32 fourcc)
1402 gboolean ret = FALSE;
1405 case V4L2_PIX_FMT_XRGB555:
1406 case V4L2_PIX_FMT_RGB555:
1407 case V4L2_PIX_FMT_XRGB555X:
1408 case V4L2_PIX_FMT_RGB555X:
1409 case V4L2_PIX_FMT_RGB565:
1410 case V4L2_PIX_FMT_RGB24:
1411 case V4L2_PIX_FMT_BGR24:
1412 case V4L2_PIX_FMT_XRGB32:
1413 case V4L2_PIX_FMT_RGB32:
1414 case V4L2_PIX_FMT_RGBA32:
1415 case V4L2_PIX_FMT_RGBX32:
1416 case V4L2_PIX_FMT_XBGR32:
1417 case V4L2_PIX_FMT_BGR32:
1418 case V4L2_PIX_FMT_BGRA32:
1419 case V4L2_PIX_FMT_BGRX32:
1420 case V4L2_PIX_FMT_ABGR32:
1421 case V4L2_PIX_FMT_ARGB32:
1422 case V4L2_PIX_FMT_SBGGR8:
1423 case V4L2_PIX_FMT_SGBRG8:
1424 case V4L2_PIX_FMT_SGRBG8:
1425 case V4L2_PIX_FMT_SRGGB8:
1435 static GstStructure *
1436 gst_v4l2_object_v4l2fourcc_to_bare_struct (guint32 fourcc)
1438 GstStructure *structure = NULL;
1441 case V4L2_PIX_FMT_MJPEG: /* Motion-JPEG */
1442 case V4L2_PIX_FMT_PJPG: /* Progressive-JPEG */
1443 case V4L2_PIX_FMT_JPEG: /* JFIF JPEG */
1444 structure = gst_structure_new_empty ("image/jpeg");
1446 case V4L2_PIX_FMT_MPEG1:
1447 structure = gst_structure_new ("video/mpeg",
1448 "mpegversion", G_TYPE_INT, 1, NULL);
1450 case V4L2_PIX_FMT_MPEG2:
1451 structure = gst_structure_new ("video/mpeg",
1452 "mpegversion", G_TYPE_INT, 2, NULL);
1454 case V4L2_PIX_FMT_MPEG4:
1455 case V4L2_PIX_FMT_XVID:
1456 structure = gst_structure_new ("video/mpeg",
1457 "mpegversion", G_TYPE_INT, 4, "systemstream",
1458 G_TYPE_BOOLEAN, FALSE, NULL);
1460 case V4L2_PIX_FMT_FWHT:
1461 structure = gst_structure_new_empty ("video/x-fwht");
1463 case V4L2_PIX_FMT_H263:
1464 structure = gst_structure_new ("video/x-h263",
1465 "variant", G_TYPE_STRING, "itu", NULL);
1467 case V4L2_PIX_FMT_H264: /* H.264 */
1468 structure = gst_structure_new ("video/x-h264",
1469 "stream-format", G_TYPE_STRING, "byte-stream", "alignment",
1470 G_TYPE_STRING, "au", NULL);
1472 case V4L2_PIX_FMT_H264_NO_SC:
1473 structure = gst_structure_new ("video/x-h264",
1474 "stream-format", G_TYPE_STRING, "avc", "alignment",
1475 G_TYPE_STRING, "au", NULL);
1477 case V4L2_PIX_FMT_HEVC: /* H.265 */
1478 structure = gst_structure_new ("video/x-h265",
1479 "stream-format", G_TYPE_STRING, "byte-stream", "alignment",
1480 G_TYPE_STRING, "au", NULL);
1482 case V4L2_PIX_FMT_VC1_ANNEX_G:
1483 case V4L2_PIX_FMT_VC1_ANNEX_L:
1484 structure = gst_structure_new ("video/x-wmv",
1485 "wmvversion", G_TYPE_INT, 3, "format", G_TYPE_STRING, "WVC1", NULL);
1487 case V4L2_PIX_FMT_VP8:
1488 structure = gst_structure_new_empty ("video/x-vp8");
1490 case V4L2_PIX_FMT_VP9:
1491 structure = gst_structure_new_empty ("video/x-vp9");
1493 case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
1494 case V4L2_PIX_FMT_Y16:
1495 case V4L2_PIX_FMT_Y16_BE:
1496 case V4L2_PIX_FMT_XRGB555:
1497 case V4L2_PIX_FMT_RGB555:
1498 case V4L2_PIX_FMT_XRGB555X:
1499 case V4L2_PIX_FMT_RGB555X:
1500 case V4L2_PIX_FMT_RGB565:
1501 case V4L2_PIX_FMT_RGB24:
1502 case V4L2_PIX_FMT_BGR24:
1503 case V4L2_PIX_FMT_RGB32:
1504 case V4L2_PIX_FMT_XRGB32:
1505 case V4L2_PIX_FMT_ARGB32:
1506 case V4L2_PIX_FMT_RGBX32:
1507 case V4L2_PIX_FMT_RGBA32:
1508 case V4L2_PIX_FMT_BGR32:
1509 case V4L2_PIX_FMT_BGRX32:
1510 case V4L2_PIX_FMT_BGRA32:
1511 case V4L2_PIX_FMT_XBGR32:
1512 case V4L2_PIX_FMT_ABGR32:
1513 case V4L2_PIX_FMT_NV12: /* 12 Y/CbCr 4:2:0 */
1514 case V4L2_PIX_FMT_NV12M:
1515 case V4L2_PIX_FMT_NV12MT:
1516 case V4L2_PIX_FMT_MM21:
1517 case V4L2_PIX_FMT_NV21: /* 12 Y/CrCb 4:2:0 */
1518 case V4L2_PIX_FMT_NV21M:
1519 case V4L2_PIX_FMT_NV16: /* 16 Y/CbCr 4:2:2 */
1520 case V4L2_PIX_FMT_NV16M:
1521 case V4L2_PIX_FMT_NV61: /* 16 Y/CrCb 4:2:2 */
1522 case V4L2_PIX_FMT_NV61M:
1523 case V4L2_PIX_FMT_NV24: /* 24 Y/CrCb 4:4:4 */
1524 case V4L2_PIX_FMT_YVU410:
1525 case V4L2_PIX_FMT_YUV410:
1526 case V4L2_PIX_FMT_YUV420: /* I420/IYUV */
1527 case V4L2_PIX_FMT_YUV420M:
1528 case V4L2_PIX_FMT_YUYV:
1529 case V4L2_PIX_FMT_YVU420:
1530 case V4L2_PIX_FMT_UYVY:
1531 case V4L2_PIX_FMT_YUV422P:
1532 case V4L2_PIX_FMT_YVYU:
1533 case V4L2_PIX_FMT_YUV411P:{
1534 GstVideoFormat format;
1535 format = gst_v4l2_object_v4l2fourcc_to_video_format (fourcc);
1536 if (format != GST_VIDEO_FORMAT_UNKNOWN)
1537 structure = gst_structure_new ("video/x-raw",
1538 "format", G_TYPE_STRING, gst_video_format_to_string (format), NULL);
1541 case V4L2_PIX_FMT_DV:
1543 gst_structure_new ("video/x-dv", "systemstream", G_TYPE_BOOLEAN, TRUE,
1546 case V4L2_PIX_FMT_MPEG: /* MPEG */
1547 structure = gst_structure_new ("video/mpegts",
1548 "systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
1550 case V4L2_PIX_FMT_WNVA: /* Winnov hw compress */
1552 case V4L2_PIX_FMT_SBGGR8:
1553 case V4L2_PIX_FMT_SGBRG8:
1554 case V4L2_PIX_FMT_SGRBG8:
1555 case V4L2_PIX_FMT_SRGGB8:
1556 structure = gst_structure_new ("video/x-bayer", "format", G_TYPE_STRING,
1557 fourcc == V4L2_PIX_FMT_SBGGR8 ? "bggr" :
1558 fourcc == V4L2_PIX_FMT_SGBRG8 ? "gbrg" :
1559 fourcc == V4L2_PIX_FMT_SGRBG8 ? "grbg" :
1560 /* fourcc == V4L2_PIX_FMT_SRGGB8 ? */ "rggb", NULL);
1562 case V4L2_PIX_FMT_SN9C10X:
1563 structure = gst_structure_new_empty ("video/x-sonix");
1565 case V4L2_PIX_FMT_PWC1:
1566 structure = gst_structure_new_empty ("video/x-pwc1");
1568 case V4L2_PIX_FMT_PWC2:
1569 structure = gst_structure_new_empty ("video/x-pwc2");
1571 case V4L2_PIX_FMT_RGB332:
1572 case V4L2_PIX_FMT_BGR666:
1573 case V4L2_PIX_FMT_ARGB555X:
1574 case V4L2_PIX_FMT_RGB565X:
1575 case V4L2_PIX_FMT_RGB444:
1576 case V4L2_PIX_FMT_YYUV: /* 16 YUV 4:2:2 */
1577 case V4L2_PIX_FMT_HI240: /* 8 8-bit color */
1578 case V4L2_PIX_FMT_Y4:
1579 case V4L2_PIX_FMT_Y6:
1580 case V4L2_PIX_FMT_Y10:
1581 case V4L2_PIX_FMT_Y12:
1582 case V4L2_PIX_FMT_Y10BPACK:
1583 case V4L2_PIX_FMT_YUV444:
1584 case V4L2_PIX_FMT_YUV555:
1585 case V4L2_PIX_FMT_YUV565:
1586 case V4L2_PIX_FMT_Y41P:
1587 case V4L2_PIX_FMT_YUV32:
1588 case V4L2_PIX_FMT_NV12MT_16X16:
1589 case V4L2_PIX_FMT_NV42:
1590 case V4L2_PIX_FMT_H264_MVC:
1592 GST_DEBUG ("Unsupported fourcc 0x%08x %" GST_FOURCC_FORMAT,
1593 fourcc, GST_FOURCC_ARGS (fourcc));
1601 gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc)
1603 GstStructure *template;
1606 template = gst_v4l2_object_v4l2fourcc_to_bare_struct (fourcc);
1608 if (template == NULL)
1611 for (i = 0; i < GST_V4L2_FORMAT_COUNT; i++) {
1612 if (gst_v4l2_formats[i].format != fourcc)
1615 if (gst_v4l2_formats[i].dimensions) {
1616 gst_structure_set (template,
1617 "width", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1618 "height", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1619 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
1628 /* Add an 'alternate' variant of the caps with the feature */
1630 add_alternate_variant (GstV4l2Object * v4l2object, GstCaps * caps,
1631 GstStructure * structure)
1633 GstStructure *alt_s;
1635 if (v4l2object && v4l2object->never_interlaced)
1638 if (!gst_structure_has_name (structure, "video/x-raw"))
1641 alt_s = gst_structure_copy (structure);
1642 gst_structure_set (alt_s, "interlace-mode", G_TYPE_STRING, "alternate", NULL);
1644 gst_caps_append_structure_full (caps, alt_s,
1645 gst_caps_features_new (GST_CAPS_FEATURE_FORMAT_INTERLACED, NULL));
1649 gst_v4l2_object_get_caps_helper (GstV4L2FormatFlags flags)
1651 GstStructure *structure;
1652 GstCaps *caps, *caps_interlaced;
1655 caps = gst_caps_new_empty ();
1656 caps_interlaced = gst_caps_new_empty ();
1657 for (i = 0; i < GST_V4L2_FORMAT_COUNT; i++) {
1659 if ((gst_v4l2_formats[i].flags & flags) == 0)
1663 gst_v4l2_object_v4l2fourcc_to_bare_struct (gst_v4l2_formats[i].format);
1666 GstStructure *alt_s = NULL;
1668 if (gst_v4l2_formats[i].dimensions) {
1669 gst_structure_set (structure,
1670 "width", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1671 "height", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1672 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
1675 switch (gst_v4l2_formats[i].format) {
1676 case V4L2_PIX_FMT_RGB32:
1677 alt_s = gst_structure_copy (structure);
1678 gst_structure_set (alt_s, "format", G_TYPE_STRING, "ARGB", NULL);
1680 case V4L2_PIX_FMT_BGR32:
1681 alt_s = gst_structure_copy (structure);
1682 gst_structure_set (alt_s, "format", G_TYPE_STRING, "BGRA", NULL);
1687 gst_caps_append_structure (caps, structure);
1690 gst_caps_append_structure (caps, alt_s);
1691 add_alternate_variant (NULL, caps_interlaced, alt_s);
1694 add_alternate_variant (NULL, caps_interlaced, structure);
1698 caps = gst_caps_simplify (caps);
1699 caps_interlaced = gst_caps_simplify (caps_interlaced);
1701 return gst_caps_merge (caps, caps_interlaced);
1705 gst_v4l2_object_get_all_caps (void)
1707 static GstCaps *caps = NULL;
1709 if (g_once_init_enter (&caps)) {
1710 GstCaps *all_caps = gst_v4l2_object_get_caps_helper (GST_V4L2_ALL);
1711 GST_MINI_OBJECT_FLAG_SET (all_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
1712 g_once_init_leave (&caps, all_caps);
1719 gst_v4l2_object_get_raw_caps (void)
1721 static GstCaps *caps = NULL;
1723 if (g_once_init_enter (&caps)) {
1724 GstCaps *raw_caps = gst_v4l2_object_get_caps_helper (GST_V4L2_RAW);
1725 GST_MINI_OBJECT_FLAG_SET (raw_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
1726 g_once_init_leave (&caps, raw_caps);
1733 gst_v4l2_object_get_codec_caps (void)
1735 static GstCaps *caps = NULL;
1737 if (g_once_init_enter (&caps)) {
1738 GstCaps *codec_caps = gst_v4l2_object_get_caps_helper (GST_V4L2_CODEC);
1739 GST_MINI_OBJECT_FLAG_SET (codec_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
1740 g_once_init_leave (&caps, codec_caps);
1746 /* collect data for the given caps
1747 * @caps: given input caps
1748 * @format: location for the v4l format
1749 * @w/@h: location for width and height
1750 * @fps_n/@fps_d: location for framerate
1751 * @size: location for expected size of the frame or 0 if unknown
1754 gst_v4l2_object_get_caps_info (GstV4l2Object * v4l2object, GstCaps * caps,
1755 struct v4l2_fmtdesc **format, GstVideoInfo * info)
1757 GstStructure *structure;
1758 guint32 fourcc = 0, fourcc_nc = 0;
1759 const gchar *mimetype;
1760 struct v4l2_fmtdesc *fmt = NULL;
1762 structure = gst_caps_get_structure (caps, 0);
1764 mimetype = gst_structure_get_name (structure);
1766 if (!gst_video_info_from_caps (info, caps))
1767 goto invalid_format;
1769 if (g_str_equal (mimetype, "video/x-raw")) {
1770 switch (GST_VIDEO_INFO_FORMAT (info)) {
1771 case GST_VIDEO_FORMAT_I420:
1772 fourcc = V4L2_PIX_FMT_YUV420;
1773 fourcc_nc = V4L2_PIX_FMT_YUV420M;
1775 case GST_VIDEO_FORMAT_YUY2:
1776 fourcc = V4L2_PIX_FMT_YUYV;
1778 case GST_VIDEO_FORMAT_UYVY:
1779 fourcc = V4L2_PIX_FMT_UYVY;
1781 case GST_VIDEO_FORMAT_YV12:
1782 fourcc = V4L2_PIX_FMT_YVU420;
1784 case GST_VIDEO_FORMAT_Y41B:
1785 fourcc = V4L2_PIX_FMT_YUV411P;
1787 case GST_VIDEO_FORMAT_Y42B:
1788 fourcc = V4L2_PIX_FMT_YUV422P;
1790 case GST_VIDEO_FORMAT_NV12:
1791 fourcc = V4L2_PIX_FMT_NV12;
1792 fourcc_nc = V4L2_PIX_FMT_NV12M;
1794 case GST_VIDEO_FORMAT_NV12_64Z32:
1795 fourcc_nc = V4L2_PIX_FMT_NV12MT;
1797 case GST_VIDEO_FORMAT_NV12_16L32S:
1798 fourcc_nc = V4L2_PIX_FMT_MM21;
1800 case GST_VIDEO_FORMAT_NV21:
1801 fourcc = V4L2_PIX_FMT_NV21;
1802 fourcc_nc = V4L2_PIX_FMT_NV21M;
1804 case GST_VIDEO_FORMAT_NV16:
1805 fourcc = V4L2_PIX_FMT_NV16;
1806 fourcc_nc = V4L2_PIX_FMT_NV16M;
1808 case GST_VIDEO_FORMAT_NV61:
1809 fourcc = V4L2_PIX_FMT_NV61;
1810 fourcc_nc = V4L2_PIX_FMT_NV61M;
1812 case GST_VIDEO_FORMAT_NV24:
1813 fourcc = V4L2_PIX_FMT_NV24;
1815 case GST_VIDEO_FORMAT_YVYU:
1816 fourcc = V4L2_PIX_FMT_YVYU;
1818 case GST_VIDEO_FORMAT_RGB15:
1819 fourcc = V4L2_PIX_FMT_RGB555;
1820 fourcc_nc = V4L2_PIX_FMT_XRGB555;
1822 case GST_VIDEO_FORMAT_RGB16:
1823 fourcc = V4L2_PIX_FMT_RGB565;
1825 case GST_VIDEO_FORMAT_RGB:
1826 fourcc = V4L2_PIX_FMT_RGB24;
1828 case GST_VIDEO_FORMAT_BGR:
1829 fourcc = V4L2_PIX_FMT_BGR24;
1831 case GST_VIDEO_FORMAT_xRGB:
1832 fourcc = V4L2_PIX_FMT_RGB32;
1833 fourcc_nc = V4L2_PIX_FMT_XRGB32;
1835 case GST_VIDEO_FORMAT_RGBx:
1836 fourcc = V4L2_PIX_FMT_RGBX32;
1838 case GST_VIDEO_FORMAT_ARGB:
1839 fourcc = V4L2_PIX_FMT_RGB32;
1840 fourcc_nc = V4L2_PIX_FMT_ARGB32;
1842 case GST_VIDEO_FORMAT_RGBA:
1843 fourcc = V4L2_PIX_FMT_RGBA32;
1845 case GST_VIDEO_FORMAT_BGRx:
1846 fourcc = V4L2_PIX_FMT_BGR32;
1847 fourcc_nc = V4L2_PIX_FMT_XBGR32;
1849 case GST_VIDEO_FORMAT_xBGR:
1850 fourcc = V4L2_PIX_FMT_BGRX32;
1852 case GST_VIDEO_FORMAT_BGRA:
1853 fourcc = V4L2_PIX_FMT_BGR32;
1854 fourcc_nc = V4L2_PIX_FMT_ABGR32;
1856 case GST_VIDEO_FORMAT_ABGR:
1857 fourcc = V4L2_PIX_FMT_BGRA32;
1859 case GST_VIDEO_FORMAT_GRAY8:
1860 fourcc = V4L2_PIX_FMT_GREY;
1862 case GST_VIDEO_FORMAT_GRAY16_LE:
1863 fourcc = V4L2_PIX_FMT_Y16;
1865 case GST_VIDEO_FORMAT_GRAY16_BE:
1866 fourcc = V4L2_PIX_FMT_Y16_BE;
1868 case GST_VIDEO_FORMAT_BGR15:
1869 fourcc = V4L2_PIX_FMT_RGB555X;
1870 fourcc_nc = V4L2_PIX_FMT_XRGB555X;
1876 if (g_str_equal (mimetype, "video/mpegts")) {
1877 fourcc = V4L2_PIX_FMT_MPEG;
1878 } else if (g_str_equal (mimetype, "video/x-dv")) {
1879 fourcc = V4L2_PIX_FMT_DV;
1880 } else if (g_str_equal (mimetype, "image/jpeg")) {
1881 fourcc = V4L2_PIX_FMT_JPEG;
1882 } else if (g_str_equal (mimetype, "video/mpeg")) {
1884 if (gst_structure_get_int (structure, "mpegversion", &version)) {
1887 fourcc = V4L2_PIX_FMT_MPEG1;
1890 fourcc = V4L2_PIX_FMT_MPEG2;
1893 fourcc = V4L2_PIX_FMT_MPEG4;
1894 fourcc_nc = V4L2_PIX_FMT_XVID;
1900 } else if (g_str_equal (mimetype, "video/x-fwht")) {
1901 fourcc = V4L2_PIX_FMT_FWHT;
1902 } else if (g_str_equal (mimetype, "video/x-h263")) {
1903 fourcc = V4L2_PIX_FMT_H263;
1904 } else if (g_str_equal (mimetype, "video/x-h264")) {
1905 const gchar *stream_format =
1906 gst_structure_get_string (structure, "stream-format");
1907 if (g_str_equal (stream_format, "avc"))
1908 fourcc = V4L2_PIX_FMT_H264_NO_SC;
1910 fourcc = V4L2_PIX_FMT_H264;
1911 } else if (g_str_equal (mimetype, "video/x-h265")) {
1912 fourcc = V4L2_PIX_FMT_HEVC;
1913 } else if (g_str_equal (mimetype, "video/x-vp8")) {
1914 fourcc = V4L2_PIX_FMT_VP8;
1915 } else if (g_str_equal (mimetype, "video/x-vp9")) {
1916 fourcc = V4L2_PIX_FMT_VP9;
1917 } else if (g_str_equal (mimetype, "video/x-bayer")) {
1918 const gchar *format = gst_structure_get_string (structure, "format");
1920 if (!g_ascii_strcasecmp (format, "bggr"))
1921 fourcc = V4L2_PIX_FMT_SBGGR8;
1922 else if (!g_ascii_strcasecmp (format, "gbrg"))
1923 fourcc = V4L2_PIX_FMT_SGBRG8;
1924 else if (!g_ascii_strcasecmp (format, "grbg"))
1925 fourcc = V4L2_PIX_FMT_SGRBG8;
1926 else if (!g_ascii_strcasecmp (format, "rggb"))
1927 fourcc = V4L2_PIX_FMT_SRGGB8;
1929 } else if (g_str_equal (mimetype, "video/x-sonix")) {
1930 fourcc = V4L2_PIX_FMT_SN9C10X;
1931 } else if (g_str_equal (mimetype, "video/x-pwc1")) {
1932 fourcc = V4L2_PIX_FMT_PWC1;
1933 } else if (g_str_equal (mimetype, "video/x-pwc2")) {
1934 fourcc = V4L2_PIX_FMT_PWC2;
1939 /* Prefer the non-contiguous if supported */
1940 v4l2object->prefered_non_contiguous = TRUE;
1943 fmt = gst_v4l2_object_get_format_from_fourcc (v4l2object, fourcc_nc);
1944 else if (fourcc == 0)
1945 goto unhandled_format;
1948 fmt = gst_v4l2_object_get_format_from_fourcc (v4l2object, fourcc);
1949 v4l2object->prefered_non_contiguous = FALSE;
1953 goto unsupported_format;
1962 GST_DEBUG_OBJECT (v4l2object, "invalid format");
1967 GST_DEBUG_OBJECT (v4l2object, "unhandled format");
1972 GST_DEBUG_OBJECT (v4l2object, "unsupported format");
1978 gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
1979 guint32 pixelformat, gint * width, gint * height);
1982 gst_v4l2_object_add_aspect_ratio (GstV4l2Object * v4l2object, GstStructure * s)
1984 if (v4l2object->keep_aspect && v4l2object->par)
1985 gst_structure_set_value (s, "pixel-aspect-ratio", v4l2object->par);
1988 /* returns TRUE if the value was changed in place, otherwise FALSE */
1990 gst_v4l2src_value_simplify (GValue * val)
1992 /* simplify list of one value to one value */
1993 if (GST_VALUE_HOLDS_LIST (val) && gst_value_list_get_size (val) == 1) {
1994 const GValue *list_val;
1995 GValue new_val = G_VALUE_INIT;
1997 list_val = gst_value_list_get_value (val, 0);
1998 g_value_init (&new_val, G_VALUE_TYPE (list_val));
1999 g_value_copy (list_val, &new_val);
2000 g_value_unset (val);
2009 gst_v4l2_object_get_interlace_mode (enum v4l2_field field,
2010 GstVideoInterlaceMode * interlace_mode)
2013 case V4L2_FIELD_ANY:
2015 ("Driver bug detected - check driver with v4l2-compliance from http://git.linuxtv.org/v4l-utils.git\n");
2017 case V4L2_FIELD_NONE:
2018 *interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
2020 case V4L2_FIELD_INTERLACED:
2021 case V4L2_FIELD_INTERLACED_TB:
2022 case V4L2_FIELD_INTERLACED_BT:
2023 *interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
2025 case V4L2_FIELD_ALTERNATE:
2026 *interlace_mode = GST_VIDEO_INTERLACE_MODE_ALTERNATE;
2029 GST_ERROR ("Unknown enum v4l2_field %d", field);
2035 gst_v4l2_object_get_colorspace (GstV4l2Object * v4l2object,
2036 struct v4l2_format *fmt, GstVideoColorimetry * cinfo)
2039 gst_v4l2_object_v4l2fourcc_is_rgb (fmt->fmt.pix.pixelformat);
2040 enum v4l2_colorspace colorspace;
2041 enum v4l2_quantization range;
2042 enum v4l2_ycbcr_encoding matrix;
2043 enum v4l2_xfer_func transfer;
2044 gboolean ret = TRUE;
2046 if (V4L2_TYPE_IS_MULTIPLANAR (fmt->type)) {
2047 colorspace = fmt->fmt.pix_mp.colorspace;
2048 range = fmt->fmt.pix_mp.quantization;
2049 matrix = fmt->fmt.pix_mp.ycbcr_enc;
2050 transfer = fmt->fmt.pix_mp.xfer_func;
2052 colorspace = fmt->fmt.pix.colorspace;
2053 range = fmt->fmt.pix.quantization;
2054 matrix = fmt->fmt.pix.ycbcr_enc;
2055 transfer = fmt->fmt.pix.xfer_func;
2058 /* First step, set the defaults for each primaries */
2059 switch (colorspace) {
2060 case V4L2_COLORSPACE_SMPTE170M:
2061 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2062 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
2063 cinfo->transfer = GST_VIDEO_TRANSFER_BT601;
2064 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_SMPTE170M;
2066 case V4L2_COLORSPACE_REC709:
2067 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2068 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT709;
2069 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
2070 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT709;
2072 case V4L2_COLORSPACE_SRGB:
2073 case V4L2_COLORSPACE_JPEG:
2074 cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
2075 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
2076 cinfo->transfer = GST_VIDEO_TRANSFER_SRGB;
2077 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT709;
2079 case V4L2_COLORSPACE_OPRGB:
2080 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2081 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
2082 cinfo->transfer = GST_VIDEO_TRANSFER_ADOBERGB;
2083 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_ADOBERGB;
2085 case V4L2_COLORSPACE_BT2020:
2086 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2087 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT2020;
2088 cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12;
2089 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT2020;
2091 case V4L2_COLORSPACE_SMPTE240M:
2092 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2093 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_SMPTE240M;
2094 cinfo->transfer = GST_VIDEO_TRANSFER_SMPTE240M;
2095 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_SMPTE240M;
2097 case V4L2_COLORSPACE_470_SYSTEM_M:
2098 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2099 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
2100 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
2101 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT470M;
2103 case V4L2_COLORSPACE_470_SYSTEM_BG:
2104 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2105 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
2106 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
2107 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT470BG;
2109 case V4L2_COLORSPACE_RAW:
2110 /* Explicitly unknown */
2111 cinfo->range = GST_VIDEO_COLOR_RANGE_UNKNOWN;
2112 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_UNKNOWN;
2113 cinfo->transfer = GST_VIDEO_TRANSFER_UNKNOWN;
2114 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_UNKNOWN;
2117 GST_DEBUG ("Unknown enum v4l2_colorspace %d", colorspace);
2125 /* Second step, apply any custom variation */
2127 case V4L2_QUANTIZATION_FULL_RANGE:
2128 cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
2130 case V4L2_QUANTIZATION_LIM_RANGE:
2131 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2133 case V4L2_QUANTIZATION_DEFAULT:
2134 /* replicated V4L2_MAP_QUANTIZATION_DEFAULT macro behavior */
2135 if (is_rgb && colorspace == V4L2_COLORSPACE_BT2020)
2136 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2137 else if (is_rgb || matrix == V4L2_YCBCR_ENC_XV601
2138 || matrix == V4L2_YCBCR_ENC_XV709
2139 || colorspace == V4L2_COLORSPACE_JPEG)
2140 cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
2142 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2145 GST_WARNING ("Unknown enum v4l2_quantization value %d", range);
2146 cinfo->range = GST_VIDEO_COLOR_RANGE_UNKNOWN;
2151 case V4L2_YCBCR_ENC_XV601:
2152 case V4L2_YCBCR_ENC_SYCC:
2153 GST_FIXME ("XV601 and SYCC not defined, assuming 601");
2155 case V4L2_YCBCR_ENC_601:
2156 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
2158 case V4L2_YCBCR_ENC_XV709:
2159 GST_FIXME ("XV709 not defined, assuming 709");
2161 case V4L2_YCBCR_ENC_709:
2162 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT709;
2164 case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
2165 GST_FIXME ("BT2020 with constant luma is not defined, assuming BT2020");
2167 case V4L2_YCBCR_ENC_BT2020:
2168 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT2020;
2170 case V4L2_YCBCR_ENC_SMPTE240M:
2171 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_SMPTE240M;
2173 case V4L2_YCBCR_ENC_DEFAULT:
2174 /* nothing, just use defaults for colorspace */
2177 GST_WARNING ("Unknown enum v4l2_ycbcr_encoding value %d", matrix);
2178 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_UNKNOWN;
2182 /* Set identity matrix for R'G'B' formats to avoid creating
2183 * confusion. This though is cosmetic as it's now properly ignored by
2184 * the video info API and videoconvert. */
2186 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_RGB;
2189 case V4L2_XFER_FUNC_709:
2190 if (colorspace == V4L2_COLORSPACE_BT2020 && fmt->fmt.pix.height >= 2160)
2191 cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12;
2192 else if (colorspace == V4L2_COLORSPACE_SMPTE170M)
2193 cinfo->transfer = GST_VIDEO_TRANSFER_BT601;
2195 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
2197 if (v4l2object->transfer)
2198 cinfo->transfer = v4l2object->transfer;
2200 case V4L2_XFER_FUNC_SRGB:
2201 cinfo->transfer = GST_VIDEO_TRANSFER_SRGB;
2203 case V4L2_XFER_FUNC_OPRGB:
2204 cinfo->transfer = GST_VIDEO_TRANSFER_ADOBERGB;
2206 case V4L2_XFER_FUNC_SMPTE240M:
2207 cinfo->transfer = GST_VIDEO_TRANSFER_SMPTE240M;
2209 case V4L2_XFER_FUNC_NONE:
2210 cinfo->transfer = GST_VIDEO_TRANSFER_GAMMA10;
2212 case V4L2_XFER_FUNC_SMPTE2084:
2213 cinfo->transfer = GST_VIDEO_TRANSFER_SMPTE2084;
2215 case V4L2_XFER_FUNC_DEFAULT:
2216 /* nothing, just use defaults for colorspace */
2219 GST_WARNING ("Unknown enum v4l2_xfer_func value %d", transfer);
2220 cinfo->transfer = GST_VIDEO_TRANSFER_UNKNOWN;
2229 gst_v4l2_object_get_streamparm (GstV4l2Object * v4l2object, GstVideoInfo * info)
2231 struct v4l2_streamparm streamparm;
2232 memset (&streamparm, 0x00, sizeof (struct v4l2_streamparm));
2233 streamparm.type = v4l2object->type;
2234 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_PARM, &streamparm) < 0) {
2235 GST_WARNING_OBJECT (v4l2object->dbg_obj, "VIDIOC_G_PARM failed");
2238 if ((streamparm.parm.capture.timeperframe.numerator != 0)
2239 && (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE
2240 || v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) {
2241 GST_VIDEO_INFO_FPS_N (info) =
2242 streamparm.parm.capture.timeperframe.denominator;
2243 GST_VIDEO_INFO_FPS_D (info) =
2244 streamparm.parm.capture.timeperframe.numerator;
2250 gst_v4l2_object_try_fmt (GstV4l2Object * v4l2object,
2251 struct v4l2_format *try_fmt)
2253 int fd = v4l2object->video_fd;
2254 struct v4l2_format fmt;
2257 memcpy (&fmt, try_fmt, sizeof (fmt));
2258 r = v4l2object->ioctl (fd, VIDIOC_TRY_FMT, &fmt);
2260 if (r < 0 && errno == ENOTTY) {
2261 /* The driver might not implement TRY_FMT, in which case we will try
2263 if (GST_V4L2_IS_ACTIVE (v4l2object))
2266 memcpy (&fmt, try_fmt, sizeof (fmt));
2267 r = v4l2object->ioctl (fd, VIDIOC_S_FMT, &fmt);
2269 memcpy (try_fmt, &fmt, sizeof (fmt));
2274 memcpy (try_fmt, &fmt, sizeof (fmt));
2275 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2276 "Unable to try format: %s", g_strerror (errno));
2282 gst_v4l2_object_add_interlace_mode (GstV4l2Object * v4l2object,
2283 GstStructure * s, guint32 width, guint32 height, guint32 pixelformat)
2285 struct v4l2_format fmt;
2286 GValue interlace_formats = { 0, };
2287 enum v4l2_field formats[] = { V4L2_FIELD_NONE,
2288 V4L2_FIELD_INTERLACED, V4L2_FIELD_ALTERNATE
2291 GstVideoInterlaceMode interlace_mode, prev = -1;
2293 if (!g_str_equal (gst_structure_get_name (s), "video/x-raw"))
2296 if (v4l2object->never_interlaced) {
2297 gst_structure_set (s, "interlace-mode", G_TYPE_STRING, "progressive", NULL);
2301 g_value_init (&interlace_formats, GST_TYPE_LIST);
2303 /* Try thrice - once for NONE, once for INTERLACED and once for ALTERNATE. */
2304 for (i = 0; i < G_N_ELEMENTS (formats); i++) {
2305 memset (&fmt, 0, sizeof (fmt));
2306 fmt.type = v4l2object->type;
2307 fmt.fmt.pix.width = width;
2308 fmt.fmt.pix.height = height;
2309 fmt.fmt.pix.pixelformat = pixelformat;
2310 fmt.fmt.pix.field = formats[i];
2312 if (fmt.fmt.pix.field == V4L2_FIELD_ALTERNATE)
2313 fmt.fmt.pix.height /= 2;
2315 /* if skip_try_fmt_probes is set it's up to the caller to filter out the
2316 * formats from the formats requested by peer.
2317 * For this negotiation to work with 'alternate' we need the caps to contain
2318 * the feature so we have an intersection with downstream caps.
2320 if (!v4l2object->skip_try_fmt_probes
2321 && gst_v4l2_object_try_fmt (v4l2object, &fmt) != 0)
2324 if (gst_v4l2_object_get_interlace_mode (fmt.fmt.pix.field, &interlace_mode)
2325 && prev != interlace_mode) {
2326 GValue interlace_enum = { 0, };
2327 const gchar *mode_string;
2328 g_value_init (&interlace_enum, G_TYPE_STRING);
2329 mode_string = gst_video_interlace_mode_to_string (interlace_mode);
2330 g_value_set_string (&interlace_enum, mode_string);
2331 gst_value_list_append_and_take_value (&interlace_formats,
2333 prev = interlace_mode;
2337 if (gst_v4l2src_value_simplify (&interlace_formats)
2338 || gst_value_list_get_size (&interlace_formats) > 0)
2339 gst_structure_take_value (s, "interlace-mode", &interlace_formats);
2341 GST_WARNING_OBJECT (v4l2object, "Failed to determine interlace mode");
2347 gst_v4l2_object_fill_colorimetry_list (GValue * list,
2348 GstVideoColorimetry * cinfo)
2350 GValue colorimetry = G_VALUE_INIT;
2353 gboolean found = FALSE;
2355 g_value_init (&colorimetry, G_TYPE_STRING);
2356 g_value_take_string (&colorimetry, gst_video_colorimetry_to_string (cinfo));
2358 /* only insert if no duplicate */
2359 size = gst_value_list_get_size (list);
2360 for (i = 0; i < size; i++) {
2363 tmp = gst_value_list_get_value (list, i);
2364 if (gst_value_compare (&colorimetry, tmp) == GST_VALUE_EQUAL) {
2371 gst_value_list_append_and_take_value (list, &colorimetry);
2373 g_value_unset (&colorimetry);
2377 gst_v4l2_object_add_colorspace (GstV4l2Object * v4l2object, GstStructure * s,
2378 guint32 width, guint32 height, guint32 pixelformat)
2380 struct v4l2_format fmt;
2381 GValue list = G_VALUE_INIT;
2382 GstVideoColorimetry cinfo;
2383 enum v4l2_colorspace req_cspace;
2385 memset (&fmt, 0, sizeof (fmt));
2386 fmt.type = v4l2object->type;
2387 fmt.fmt.pix.width = width;
2388 fmt.fmt.pix.height = height;
2389 fmt.fmt.pix.pixelformat = pixelformat;
2391 g_value_init (&list, GST_TYPE_LIST);
2393 /* step 1: get device default colorspace and insert it first as
2394 * it should be the preferred one */
2395 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0) {
2396 if (gst_v4l2_object_get_colorspace (v4l2object, &fmt, &cinfo))
2397 gst_v4l2_object_fill_colorimetry_list (&list, &cinfo);
2400 /* step 2: probe all colorspace other than default
2401 * We don't probe all colorspace, range, matrix and transfer combination to
2402 * avoid ioctl flooding which could greatly increase initialization time
2403 * with low-speed devices (UVC...) */
2404 for (req_cspace = V4L2_COLORSPACE_SMPTE170M;
2405 req_cspace <= V4L2_COLORSPACE_RAW; req_cspace++) {
2406 /* V4L2_COLORSPACE_BT878 is deprecated and shall not be used, so skip */
2407 if (req_cspace == V4L2_COLORSPACE_BT878)
2410 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
2411 fmt.fmt.pix_mp.colorspace = req_cspace;
2413 fmt.fmt.pix.colorspace = req_cspace;
2415 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0) {
2416 enum v4l2_colorspace colorspace;
2418 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
2419 colorspace = fmt.fmt.pix_mp.colorspace;
2421 colorspace = fmt.fmt.pix.colorspace;
2423 if (colorspace == req_cspace) {
2424 if (gst_v4l2_object_get_colorspace (v4l2object, &fmt, &cinfo))
2425 gst_v4l2_object_fill_colorimetry_list (&list, &cinfo);
2430 if (gst_value_list_get_size (&list) > 0)
2431 gst_structure_take_value (s, "colorimetry", &list);
2433 g_value_unset (&list);
2438 /* The frame interval enumeration code first appeared in Linux 2.6.19. */
2439 static GstStructure *
2440 gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
2441 guint32 pixelformat,
2442 guint32 width, guint32 height, const GstStructure * template)
2444 gint fd = v4l2object->video_fd;
2445 struct v4l2_frmivalenum ival;
2448 GValue rates = { 0, };
2450 memset (&ival, 0, sizeof (struct v4l2_frmivalenum));
2452 ival.pixel_format = pixelformat;
2454 ival.height = height;
2456 GST_LOG_OBJECT (v4l2object->dbg_obj,
2457 "get frame interval for %ux%u, %" GST_FOURCC_FORMAT, width, height,
2458 GST_FOURCC_ARGS (pixelformat));
2460 /* keep in mind that v4l2 gives us frame intervals (durations); we invert the
2461 * fraction to get framerate */
2462 if (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) < 0)
2463 goto enum_frameintervals_failed;
2465 if (ival.type == V4L2_FRMIVAL_TYPE_DISCRETE) {
2466 GValue rate = { 0, };
2468 g_value_init (&rates, GST_TYPE_LIST);
2469 g_value_init (&rate, GST_TYPE_FRACTION);
2472 num = ival.discrete.numerator;
2473 denom = ival.discrete.denominator;
2475 if (num > G_MAXINT || denom > G_MAXINT) {
2476 /* let us hope we don't get here... */
2481 GST_LOG_OBJECT (v4l2object->dbg_obj, "adding discrete framerate: %d/%d",
2484 /* swap to get the framerate */
2485 gst_value_set_fraction (&rate, denom, num);
2486 gst_value_list_append_value (&rates, &rate);
2489 } while (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) >= 0);
2490 } else if (ival.type == V4L2_FRMIVAL_TYPE_STEPWISE) {
2491 GValue min = { 0, };
2492 GValue step = { 0, };
2493 GValue max = { 0, };
2494 gboolean added = FALSE;
2495 guint32 minnum, mindenom;
2496 guint32 maxnum, maxdenom;
2498 g_value_init (&rates, GST_TYPE_LIST);
2500 g_value_init (&min, GST_TYPE_FRACTION);
2501 g_value_init (&step, GST_TYPE_FRACTION);
2502 g_value_init (&max, GST_TYPE_FRACTION);
2505 minnum = ival.stepwise.min.numerator;
2506 mindenom = ival.stepwise.min.denominator;
2507 if (minnum > G_MAXINT || mindenom > G_MAXINT) {
2511 GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise min frame interval: %d/%d",
2513 gst_value_set_fraction (&min, minnum, mindenom);
2516 maxnum = ival.stepwise.max.numerator;
2517 maxdenom = ival.stepwise.max.denominator;
2518 if (maxnum > G_MAXINT || maxdenom > G_MAXINT) {
2523 GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise max frame interval: %d/%d",
2525 gst_value_set_fraction (&max, maxnum, maxdenom);
2528 num = ival.stepwise.step.numerator;
2529 denom = ival.stepwise.step.denominator;
2530 if (num > G_MAXINT || denom > G_MAXINT) {
2535 if (num == 0 || denom == 0) {
2536 /* in this case we have a wrong fraction or no step, set the step to max
2537 * so that we only add the min value in the loop below */
2542 /* since we only have gst_value_fraction_subtract and not add, negate the
2544 GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise step frame interval: %d/%d",
2546 gst_value_set_fraction (&step, -num, denom);
2548 while (gst_value_compare (&min, &max) != GST_VALUE_GREATER_THAN) {
2549 GValue rate = { 0, };
2551 num = gst_value_get_fraction_numerator (&min);
2552 denom = gst_value_get_fraction_denominator (&min);
2553 GST_LOG_OBJECT (v4l2object->dbg_obj, "adding stepwise framerate: %d/%d",
2556 /* invert to get the framerate */
2557 g_value_init (&rate, GST_TYPE_FRACTION);
2558 gst_value_set_fraction (&rate, denom, num);
2559 gst_value_list_append_value (&rates, &rate);
2562 /* we're actually adding because step was negated above. This is because
2563 * there is no _add function... */
2564 if (!gst_value_fraction_subtract (&min, &min, &step)) {
2565 GST_WARNING_OBJECT (v4l2object->dbg_obj, "could not step fraction!");
2570 /* no range was added, leave the default range from the template */
2571 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2572 "no range added, leaving default");
2573 g_value_unset (&rates);
2575 } else if (ival.type == V4L2_FRMIVAL_TYPE_CONTINUOUS) {
2576 guint32 maxnum, maxdenom;
2578 g_value_init (&rates, GST_TYPE_FRACTION_RANGE);
2580 num = ival.stepwise.min.numerator;
2581 denom = ival.stepwise.min.denominator;
2582 if (num > G_MAXINT || denom > G_MAXINT) {
2587 maxnum = ival.stepwise.max.numerator;
2588 maxdenom = ival.stepwise.max.denominator;
2589 if (maxnum > G_MAXINT || maxdenom > G_MAXINT) {
2594 GST_LOG_OBJECT (v4l2object->dbg_obj,
2595 "continuous frame interval %d/%d to %d/%d", maxdenom, maxnum, denom,
2598 gst_value_set_fraction_range_full (&rates, maxdenom, maxnum, denom, num);
2604 s = gst_structure_copy (template);
2605 gst_structure_set (s, "width", G_TYPE_INT, (gint) width,
2606 "height", G_TYPE_INT, (gint) height, NULL);
2608 gst_v4l2_object_add_aspect_ratio (v4l2object, s);
2610 if (!v4l2object->skip_try_fmt_probes) {
2611 gst_v4l2_object_add_interlace_mode (v4l2object, s, width, height,
2613 gst_v4l2_object_add_colorspace (v4l2object, s, width, height, pixelformat);
2616 if (G_IS_VALUE (&rates)) {
2617 gst_v4l2src_value_simplify (&rates);
2618 /* only change the framerate on the template when we have a valid probed new
2620 gst_structure_take_value (s, "framerate", &rates);
2621 } else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2622 v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
2623 gst_structure_set (s, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT,
2629 enum_frameintervals_failed:
2631 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2632 "Unable to enumerate intervals for %" GST_FOURCC_FORMAT "@%ux%u",
2633 GST_FOURCC_ARGS (pixelformat), width, height);
2638 /* I don't see how this is actually an error, we ignore the format then */
2639 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2640 "Unknown frame interval type at %" GST_FOURCC_FORMAT "@%ux%u: %u",
2641 GST_FOURCC_ARGS (pixelformat), width, height, ival.type);
2647 sort_by_frame_size (GstStructure * s1, GstStructure * s2)
2651 gst_structure_get_int (s1, "width", &w1);
2652 gst_structure_get_int (s1, "height", &h1);
2653 gst_structure_get_int (s2, "width", &w2);
2654 gst_structure_get_int (s2, "height", &h2);
2656 /* I think it's safe to assume that this won't overflow for a while */
2657 return ((w2 * h2) - (w1 * h1));
2661 check_alternate_and_append_struct (GstCaps * caps, GstStructure * s)
2665 mode = gst_structure_get_value (s, "interlace-mode");
2669 if (G_VALUE_HOLDS_STRING (mode)) {
2670 /* Add the INTERLACED feature if the mode is alternate */
2671 if (!g_strcmp0 (gst_structure_get_string (s, "interlace-mode"),
2673 GstCapsFeatures *feat;
2675 feat = gst_caps_features_new (GST_CAPS_FEATURE_FORMAT_INTERLACED, NULL);
2676 gst_caps_set_features (caps, gst_caps_get_size (caps) - 1, feat);
2678 } else if (GST_VALUE_HOLDS_LIST (mode)) {
2679 /* If the mode is a list containing alternate, remove it from the list and add a
2680 * variant with interlace-mode=alternate and the INTERLACED feature. */
2681 GValue alter = G_VALUE_INIT;
2682 GValue inter = G_VALUE_INIT;
2684 g_value_init (&alter, G_TYPE_STRING);
2685 g_value_set_string (&alter, "alternate");
2687 /* Cannot use gst_value_can_intersect() as it requires args to have the
2689 if (gst_value_intersect (&inter, mode, &alter)) {
2690 GValue minus_alter = G_VALUE_INIT;
2693 gst_value_subtract (&minus_alter, mode, &alter);
2694 gst_structure_take_value (s, "interlace-mode", &minus_alter);
2696 copy = gst_structure_copy (s);
2697 gst_structure_take_value (copy, "interlace-mode", &inter);
2698 gst_caps_append_structure_full (caps, copy,
2699 gst_caps_features_new (GST_CAPS_FEATURE_FORMAT_INTERLACED, NULL));
2701 g_value_unset (&alter);
2705 gst_caps_append_structure (caps, s);
2709 gst_v4l2_object_update_and_append (GstV4l2Object * v4l2object,
2710 guint32 format, GstCaps * caps, GstStructure * s)
2712 GstStructure *alt_s = NULL;
2714 /* Encoded stream on output buffer need to be parsed */
2715 if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
2716 v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
2719 for (; i < GST_V4L2_FORMAT_COUNT; i++) {
2720 if (format == gst_v4l2_formats[i].format &&
2721 gst_v4l2_formats[i].flags & GST_V4L2_CODEC &&
2722 !(gst_v4l2_formats[i].flags & GST_V4L2_NO_PARSE)) {
2723 gst_structure_set (s, "parsed", G_TYPE_BOOLEAN, TRUE, NULL);
2729 if (v4l2object->has_alpha_component &&
2730 (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2731 v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) {
2733 case V4L2_PIX_FMT_RGB32:
2734 alt_s = gst_structure_copy (s);
2735 gst_structure_set (alt_s, "format", G_TYPE_STRING, "ARGB", NULL);
2737 case V4L2_PIX_FMT_BGR32:
2738 alt_s = gst_structure_copy (s);
2739 gst_structure_set (alt_s, "format", G_TYPE_STRING, "BGRA", NULL);
2746 check_alternate_and_append_struct (caps, s);
2749 check_alternate_and_append_struct (caps, alt_s);
2754 gst_v4l2_object_probe_caps_for_format (GstV4l2Object * v4l2object,
2755 guint32 pixelformat, const GstStructure * template)
2757 GstCaps *ret = gst_caps_new_empty ();
2759 gint fd = v4l2object->video_fd;
2760 struct v4l2_frmsizeenum size;
2761 GList *results = NULL;
2764 if (pixelformat == GST_MAKE_FOURCC ('M', 'P', 'E', 'G')) {
2765 gst_caps_append_structure (ret, gst_structure_copy (template));
2769 memset (&size, 0, sizeof (struct v4l2_frmsizeenum));
2771 size.pixel_format = pixelformat;
2773 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2774 "Enumerating frame sizes for %" GST_FOURCC_FORMAT,
2775 GST_FOURCC_ARGS (pixelformat));
2777 if (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) < 0)
2778 goto enum_framesizes_failed;
2780 if (size.type == V4L2_FRMSIZE_TYPE_DISCRETE) {
2782 GST_LOG_OBJECT (v4l2object->dbg_obj, "got discrete frame size %dx%d",
2783 size.discrete.width, size.discrete.height);
2785 w = MIN (size.discrete.width, G_MAXINT);
2786 h = MIN (size.discrete.height, G_MAXINT);
2790 gst_v4l2_object_probe_caps_for_format_and_size (v4l2object,
2791 pixelformat, w, h, template);
2794 results = g_list_prepend (results, tmp);
2798 } while (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) >= 0);
2799 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2800 "done iterating discrete frame sizes");
2801 } else if (size.type == V4L2_FRMSIZE_TYPE_STEPWISE) {
2802 guint32 maxw, maxh, step_w, step_h;
2804 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "we have stepwise frame sizes:");
2805 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min width: %d",
2806 size.stepwise.min_width);
2807 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2808 size.stepwise.min_height);
2809 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "max width: %d",
2810 size.stepwise.max_width);
2811 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2812 size.stepwise.max_height);
2813 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "step width: %d",
2814 size.stepwise.step_width);
2815 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "step height: %d",
2816 size.stepwise.step_height);
2818 w = MAX (size.stepwise.min_width, 1);
2819 h = MAX (size.stepwise.min_height, 1);
2820 maxw = MIN (size.stepwise.max_width, G_MAXINT);
2821 maxh = MIN (size.stepwise.max_height, G_MAXINT);
2823 step_w = MAX (size.stepwise.step_width, 1);
2824 step_h = MAX (size.stepwise.step_height, 1);
2826 /* FIXME: check for sanity and that min/max are multiples of the steps */
2828 /* we only query details for the max width/height since it's likely the
2829 * most restricted if there are any resolution-dependent restrictions */
2830 tmp = gst_v4l2_object_probe_caps_for_format_and_size (v4l2object,
2831 pixelformat, maxw, maxh, template);
2834 GValue step_range = G_VALUE_INIT;
2836 g_value_init (&step_range, GST_TYPE_INT_RANGE);
2837 gst_value_set_int_range_step (&step_range, w, maxw, step_w);
2838 gst_structure_set_value (tmp, "width", &step_range);
2840 gst_value_set_int_range_step (&step_range, h, maxh, step_h);
2841 gst_structure_take_value (tmp, "height", &step_range);
2843 /* no point using the results list here, since there's only one struct */
2844 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
2846 } else if (size.type == V4L2_FRMSIZE_TYPE_CONTINUOUS) {
2849 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "we have continuous frame sizes:");
2850 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min width: %d",
2851 size.stepwise.min_width);
2852 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2853 size.stepwise.min_height);
2854 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "max width: %d",
2855 size.stepwise.max_width);
2856 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2857 size.stepwise.max_height);
2859 w = MAX (size.stepwise.min_width, 1);
2860 h = MAX (size.stepwise.min_height, 1);
2861 maxw = MIN (size.stepwise.max_width, G_MAXINT);
2862 maxh = MIN (size.stepwise.max_height, G_MAXINT);
2865 gst_v4l2_object_probe_caps_for_format_and_size (v4l2object, pixelformat,
2868 gst_structure_set (tmp, "width", GST_TYPE_INT_RANGE, (gint) w,
2869 (gint) maxw, "height", GST_TYPE_INT_RANGE, (gint) h, (gint) maxh,
2872 /* no point using the results list here, since there's only one struct */
2873 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
2879 /* we use an intermediary list to store and then sort the results of the
2880 * probing because we can't make any assumptions about the order in which
2881 * the driver will give us the sizes, but we want the final caps to contain
2882 * the results starting with the highest resolution and having the lowest
2883 * resolution last, since order in caps matters for things like fixation. */
2884 results = g_list_sort (results, (GCompareFunc) sort_by_frame_size);
2885 while (results != NULL) {
2886 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret,
2888 results = g_list_delete_link (results, results);
2891 if (gst_caps_is_empty (ret))
2892 goto enum_framesizes_no_results;
2897 enum_framesizes_failed:
2899 /* I don't see how this is actually an error */
2900 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2901 "Failed to enumerate frame sizes for pixelformat %" GST_FOURCC_FORMAT
2902 " (%s)", GST_FOURCC_ARGS (pixelformat), g_strerror (errno));
2903 goto default_frame_sizes;
2905 enum_framesizes_no_results:
2907 /* it's possible that VIDIOC_ENUM_FRAMESIZES is defined but the driver in
2908 * question doesn't actually support it yet */
2909 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2910 "No results for pixelformat %" GST_FOURCC_FORMAT
2911 " enumerating frame sizes, trying fallback",
2912 GST_FOURCC_ARGS (pixelformat));
2913 goto default_frame_sizes;
2917 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2918 "Unknown frame sizeenum type for pixelformat %" GST_FOURCC_FORMAT
2919 ": %u", GST_FOURCC_ARGS (pixelformat), size.type);
2920 goto default_frame_sizes;
2923 default_frame_sizes:
2925 gint min_w, max_w, min_h, max_h, fix_num = 0, fix_denom = 0;
2927 /* This code is for Linux < 2.6.19 */
2929 max_w = max_h = GST_V4L2_MAX_SIZE;
2930 if (!gst_v4l2_object_get_nearest_size (v4l2object, pixelformat, &min_w,
2932 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2933 "Could not probe minimum capture size for pixelformat %"
2934 GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
2936 if (!gst_v4l2_object_get_nearest_size (v4l2object, pixelformat, &max_w,
2938 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2939 "Could not probe maximum capture size for pixelformat %"
2940 GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
2942 if (min_w == 0 || min_h == 0)
2944 if (max_w == 0 || max_h == 0)
2945 max_w = max_h = GST_V4L2_MAX_SIZE;
2947 /* Since we can't get framerate directly, try to use the current norm */
2948 if (v4l2object->tv_norm && v4l2object->norms) {
2950 GstTunerNorm *norm = NULL;
2951 GstTunerNorm *current =
2952 gst_v4l2_tuner_get_norm_by_std_id (v4l2object, v4l2object->tv_norm);
2954 for (norms = v4l2object->norms; norms != NULL; norms = norms->next) {
2955 norm = (GstTunerNorm *) norms->data;
2956 if (!strcmp (norm->label, current->label))
2959 /* If it's possible, set framerate to that (discrete) value */
2961 fix_num = gst_value_get_fraction_numerator (&norm->framerate);
2962 fix_denom = gst_value_get_fraction_denominator (&norm->framerate);
2966 tmp = gst_structure_copy (template);
2968 gst_structure_set (tmp, "framerate", GST_TYPE_FRACTION, fix_num,
2970 } else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2971 v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
2972 /* if norm can't be used, copy the template framerate */
2973 gst_structure_set (tmp, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
2978 gst_structure_set (tmp, "width", G_TYPE_INT, max_w, NULL);
2980 gst_structure_set (tmp, "width", GST_TYPE_INT_RANGE, min_w, max_w, NULL);
2983 gst_structure_set (tmp, "height", G_TYPE_INT, max_h, NULL);
2985 gst_structure_set (tmp, "height", GST_TYPE_INT_RANGE, min_h, max_h, NULL);
2987 gst_v4l2_object_add_aspect_ratio (v4l2object, tmp);
2989 /* We could consider setting interlace mode from min and max. */
2990 gst_v4l2_object_add_interlace_mode (v4l2object, tmp, max_w, max_h,
2993 if (!v4l2object->skip_try_fmt_probes) {
2994 gint probed_w, probed_h;
2995 if (v4l2object->info.width >= min_w && v4l2object->info.width <= max_w &&
2996 v4l2object->info.height >= min_h
2997 && v4l2object->info.height <= max_h) {
2998 probed_w = v4l2object->info.width;
2999 probed_h = v4l2object->info.height;
3004 /* We could consider to check colorspace for min too, in case it depends on
3005 * the size. But in this case, min and max could not be enough */
3006 gst_v4l2_object_add_colorspace (v4l2object, tmp, probed_w, probed_h,
3010 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
3016 gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
3017 guint32 pixelformat, gint * width, gint * height)
3019 struct v4l2_format fmt;
3020 gboolean ret = FALSE;
3021 GstVideoInterlaceMode interlace_mode;
3023 g_return_val_if_fail (width != NULL, FALSE);
3024 g_return_val_if_fail (height != NULL, FALSE);
3026 GST_LOG_OBJECT (v4l2object->dbg_obj,
3027 "getting nearest size to %dx%d with format %" GST_FOURCC_FORMAT,
3028 *width, *height, GST_FOURCC_ARGS (pixelformat));
3030 memset (&fmt, 0, sizeof (struct v4l2_format));
3032 /* get size delimiters */
3033 memset (&fmt, 0, sizeof (fmt));
3034 fmt.type = v4l2object->type;
3035 fmt.fmt.pix.width = *width;
3036 fmt.fmt.pix.height = *height;
3037 fmt.fmt.pix.pixelformat = pixelformat;
3038 fmt.fmt.pix.field = V4L2_FIELD_ANY;
3040 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) < 0)
3043 GST_LOG_OBJECT (v4l2object->dbg_obj,
3044 "got nearest size %dx%d", fmt.fmt.pix.width, fmt.fmt.pix.height);
3046 *width = fmt.fmt.pix.width;
3047 *height = fmt.fmt.pix.height;
3049 if (!gst_v4l2_object_get_interlace_mode (fmt.fmt.pix.field, &interlace_mode)) {
3050 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3051 "Unsupported field type for %" GST_FOURCC_FORMAT "@%ux%u: %u",
3052 GST_FOURCC_ARGS (pixelformat), *width, *height, fmt.fmt.pix.field);
3060 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3061 "Unable to try format: %s", g_strerror (errno));
3068 gst_v4l2_object_is_dmabuf_supported (GstV4l2Object * v4l2object)
3070 gboolean ret = TRUE;
3071 struct v4l2_exportbuffer expbuf = {
3072 .type = v4l2object->type,
3075 .flags = O_CLOEXEC | O_RDWR,
3078 if (v4l2object->fmtdesc &&
3079 v4l2object->fmtdesc->flags & V4L2_FMT_FLAG_EMULATED) {
3080 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3081 "libv4l2 converter detected, disabling DMABuf");
3085 /* Expected to fail, but ENOTTY tells us that it is not implemented. */
3086 v4l2object->ioctl (v4l2object->video_fd, VIDIOC_EXPBUF, &expbuf);
3087 if (errno == ENOTTY)
3094 gst_v4l2_object_setup_pool (GstV4l2Object * v4l2object, GstCaps * caps)
3098 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "initializing the %s system",
3099 V4L2_TYPE_IS_OUTPUT (v4l2object->type) ? "output" : "capture");
3101 GST_V4L2_CHECK_OPEN (v4l2object);
3102 GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
3104 /* find transport */
3105 mode = v4l2object->req_mode;
3107 if (v4l2object->device_caps & V4L2_CAP_READWRITE) {
3108 if (v4l2object->req_mode == GST_V4L2_IO_AUTO)
3109 mode = GST_V4L2_IO_RW;
3110 } else if (v4l2object->req_mode == GST_V4L2_IO_RW)
3111 goto method_not_supported;
3113 if (v4l2object->device_caps & V4L2_CAP_STREAMING) {
3114 if (v4l2object->req_mode == GST_V4L2_IO_AUTO) {
3115 if (!V4L2_TYPE_IS_OUTPUT (v4l2object->type) &&
3116 gst_v4l2_object_is_dmabuf_supported (v4l2object)) {
3117 mode = GST_V4L2_IO_DMABUF;
3119 mode = GST_V4L2_IO_MMAP;
3122 } else if (v4l2object->req_mode == GST_V4L2_IO_MMAP ||
3123 v4l2object->req_mode == GST_V4L2_IO_DMABUF)
3124 goto method_not_supported;
3126 /* if still no transport selected, error out */
3127 if (mode == GST_V4L2_IO_AUTO)
3128 goto no_supported_capture_method;
3130 GST_INFO_OBJECT (v4l2object->dbg_obj, "accessing buffers via mode %d", mode);
3131 v4l2object->mode = mode;
3133 /* If min_buffers is not set, the driver either does not support the control or
3134 it has not been asked yet via propose_allocation/decide_allocation. */
3135 if (!v4l2object->min_buffers)
3136 gst_v4l2_get_driver_min_buffers (v4l2object);
3138 /* Map the buffers */
3139 GST_LOG_OBJECT (v4l2object->dbg_obj, "initiating buffer pool");
3141 if (!(v4l2object->pool = gst_v4l2_buffer_pool_new (v4l2object, caps)))
3142 goto buffer_pool_new_failed;
3144 GST_V4L2_SET_ACTIVE (v4l2object);
3149 buffer_pool_new_failed:
3151 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
3152 (_("Could not map buffers from device '%s'"),
3153 v4l2object->videodev),
3154 ("Failed to create buffer pool: %s", g_strerror (errno)));
3157 method_not_supported:
3159 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
3160 (_("The driver of device '%s' does not support the IO method %d"),
3161 v4l2object->videodev, mode), (NULL));
3164 no_supported_capture_method:
3166 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
3167 (_("The driver of device '%s' does not support any known IO "
3168 "method."), v4l2object->videodev), (NULL));
3174 gst_v4l2_object_set_stride (GstVideoInfo * info, GstVideoAlignment * align,
3175 gint plane, gint stride)
3177 const GstVideoFormatInfo *finfo = info->finfo;
3179 if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
3180 gint x_tiles, y_tiles, ws, hs, tile_height, padded_height;
3182 ws = GST_VIDEO_FORMAT_INFO_TILE_WS (finfo);
3183 hs = GST_VIDEO_FORMAT_INFO_TILE_HS (finfo);
3185 /* this only works for what we support, NV12 subsampled tiles */
3186 if (GST_VIDEO_FORMAT_INFO_HAS_SUBTILES (finfo) && plane == 1)
3189 tile_height = 1 << hs;
3191 padded_height = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, plane,
3192 info->height + align->padding_top + align->padding_bottom);
3193 padded_height = GST_ROUND_UP_N (padded_height, tile_height);
3195 x_tiles = stride >> ws;
3196 y_tiles = padded_height >> hs;
3197 info->stride[plane] = GST_VIDEO_TILE_MAKE_STRIDE (x_tiles, y_tiles);
3199 info->stride[plane] = stride;
3204 gst_v4l2_object_extrapolate_info (GstV4l2Object * v4l2object,
3205 GstVideoInfo * info, GstVideoAlignment * align, gint stride)
3207 const GstVideoFormatInfo *finfo = info->finfo;
3208 gint i, estride, padded_height;
3211 g_return_if_fail (v4l2object->n_v4l2_planes == 1);
3214 GST_VIDEO_INFO_FIELD_HEIGHT (info) + align->padding_top +
3215 align->padding_bottom;
3217 for (i = 0; i < finfo->n_planes; i++) {
3218 estride = gst_video_format_info_extrapolate_stride (finfo, i, stride);
3220 gst_v4l2_object_set_stride (info, align, i, estride);
3222 info->offset[i] = offs;
3224 GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, i, padded_height);
3226 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
3227 "Extrapolated for plane %d with base stride %d: "
3228 "stride %d, offset %" G_GSIZE_FORMAT, i, stride, info->stride[i],
3232 /* Update the image size according the amount of data we are going to
3233 * read/write. This workaround bugs in driver where the sizeimage provided
3234 * by TRY/S_FMT represent the buffer length (maximum size) rather then the expected
3235 * bytesused (buffer size). */
3236 if (offs < info->size)
3241 gst_v4l2_object_save_format (GstV4l2Object * v4l2object,
3242 struct v4l2_fmtdesc *fmtdesc, struct v4l2_format *format,
3243 GstVideoInfo * info, GstVideoAlignment * align)
3245 const GstVideoFormatInfo *finfo = info->finfo;
3246 gboolean standard_stride = TRUE;
3247 gint stride, pstride, padded_width, padded_height, i;
3249 if (GST_VIDEO_INFO_FORMAT (info) == GST_VIDEO_FORMAT_ENCODED) {
3250 v4l2object->n_v4l2_planes = 1;
3251 info->size = format->fmt.pix.sizeimage;
3255 /* adjust right padding */
3256 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
3257 stride = format->fmt.pix_mp.plane_fmt[0].bytesperline;
3259 stride = format->fmt.pix.bytesperline;
3261 pstride = GST_VIDEO_FORMAT_INFO_PSTRIDE (finfo, 0);
3263 padded_width = stride / pstride;
3265 /* pstride can be 0 for complex formats */
3266 GST_WARNING_OBJECT (v4l2object->element,
3267 "format %s has a pstride of 0, cannot compute padded with",
3268 gst_video_format_to_string (GST_VIDEO_INFO_FORMAT (info)));
3269 padded_width = stride;
3272 if (padded_width < format->fmt.pix.width)
3273 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3274 "Driver bug detected, stride (%d) is too small for the width (%d)",
3275 padded_width, format->fmt.pix.width);
3277 align->padding_right = padded_width - info->width - align->padding_left;
3279 /* adjust bottom padding */
3280 padded_height = format->fmt.pix.height;
3282 if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
3283 guint hs, tile_height;
3285 hs = GST_VIDEO_FORMAT_INFO_TILE_HS (finfo);
3286 tile_height = 1 << hs;
3288 padded_height = GST_ROUND_UP_N (padded_height, tile_height);
3291 align->padding_bottom =
3292 padded_height - GST_VIDEO_INFO_FIELD_HEIGHT (info) - align->padding_top;
3294 /* setup the strides and offset */
3295 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type)) {
3296 struct v4l2_pix_format_mplane *pix_mp = &format->fmt.pix_mp;
3298 /* figure out the frame layout */
3299 v4l2object->n_v4l2_planes = MAX (1, pix_mp->num_planes);
3301 for (i = 0; i < v4l2object->n_v4l2_planes; i++) {
3302 stride = pix_mp->plane_fmt[i].bytesperline;
3304 if (info->stride[i] != stride)
3305 standard_stride = FALSE;
3307 gst_v4l2_object_set_stride (info, align, i, stride);
3308 info->offset[i] = info->size;
3309 info->size += pix_mp->plane_fmt[i].sizeimage;
3312 /* Extrapolate stride if planar format are being set in 1 v4l2 plane */
3313 if (v4l2object->n_v4l2_planes < finfo->n_planes) {
3314 stride = format->fmt.pix_mp.plane_fmt[0].bytesperline;
3315 gst_v4l2_object_extrapolate_info (v4l2object, info, align, stride);
3318 /* only one plane in non-MPLANE mode */
3319 v4l2object->n_v4l2_planes = 1;
3320 info->size = format->fmt.pix.sizeimage;
3321 stride = format->fmt.pix.bytesperline;
3323 if (info->stride[0] != stride)
3324 standard_stride = FALSE;
3326 gst_v4l2_object_extrapolate_info (v4l2object, info, align, stride);
3329 /* adjust the offset to take into account left and top */
3330 if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
3331 if ((align->padding_left + align->padding_top) > 0)
3332 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3333 "Left and top padding is not permitted for tiled formats");
3335 for (i = 0; i < finfo->n_planes; i++) {
3338 /* FIXME we assume plane as component as this is true for all supported
3339 * format we support. */
3341 hedge = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, i, align->padding_left);
3342 vedge = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, i, align->padding_top);
3344 info->offset[i] += (vedge * info->stride[i]) +
3345 (hedge * GST_VIDEO_INFO_COMP_PSTRIDE (info, i));
3350 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got sizeimage %" G_GSIZE_FORMAT,
3353 /* to avoid copies we need video meta if there is padding */
3354 v4l2object->need_video_meta =
3355 ((align->padding_top + align->padding_left + align->padding_right +
3356 align->padding_bottom) != 0);
3358 /* ... or if stride is non "standard" */
3359 if (!standard_stride)
3360 v4l2object->need_video_meta = TRUE;
3362 /* ... or also video meta if we use multiple, non-contiguous, planes */
3363 if (v4l2object->n_v4l2_planes > 1)
3364 v4l2object->need_video_meta = TRUE;
3366 v4l2object->info = *info;
3367 v4l2object->align = *align;
3368 v4l2object->format = *format;
3369 v4l2object->fmtdesc = fmtdesc;
3371 /* if we have a framerate pre-calculate duration */
3372 if (info->fps_n > 0 && info->fps_d > 0) {
3373 v4l2object->duration = gst_util_uint64_scale_int (GST_SECOND, info->fps_d,
3375 if (GST_VIDEO_INFO_INTERLACE_MODE (info) ==
3376 GST_VIDEO_INTERLACE_MODE_ALTERNATE)
3377 v4l2object->duration /= 2;
3379 v4l2object->duration = GST_CLOCK_TIME_NONE;
3383 static enum v4l2_field
3384 get_v4l2_field_for_info (GstVideoInfo * info)
3386 if (!GST_VIDEO_INFO_IS_INTERLACED (info))
3387 return V4L2_FIELD_NONE;
3389 if (GST_VIDEO_INFO_INTERLACE_MODE (info) ==
3390 GST_VIDEO_INTERLACE_MODE_ALTERNATE)
3391 return V4L2_FIELD_ALTERNATE;
3393 switch (GST_VIDEO_INFO_FIELD_ORDER (info)) {
3394 case GST_VIDEO_FIELD_ORDER_TOP_FIELD_FIRST:
3395 return V4L2_FIELD_INTERLACED_TB;
3396 case GST_VIDEO_FIELD_ORDER_BOTTOM_FIELD_FIRST:
3397 return V4L2_FIELD_INTERLACED_BT;
3398 case GST_VIDEO_FIELD_ORDER_UNKNOWN:
3400 return V4L2_FIELD_INTERLACED;
3405 gst_v4l2_video_colorimetry_matches (const GstVideoColorimetry * cinfo,
3409 static const GstVideoColorimetry ci_likely_jpeg = {
3410 GST_VIDEO_COLOR_RANGE_0_255, GST_VIDEO_COLOR_MATRIX_BT601,
3411 GST_VIDEO_TRANSFER_UNKNOWN, GST_VIDEO_COLOR_PRIMARIES_UNKNOWN
3413 static const GstVideoColorimetry ci_jpeg = {
3414 GST_VIDEO_COLOR_RANGE_0_255, GST_VIDEO_COLOR_MATRIX_BT601,
3415 GST_VIDEO_TRANSFER_SRGB, GST_VIDEO_COLOR_PRIMARIES_BT709
3418 if (!gst_video_info_from_caps (&info, caps))
3421 /* if colorimetry in caps is unknown, use the default one */
3422 if (info.colorimetry.primaries == GST_VIDEO_COLOR_PRIMARIES_UNKNOWN)
3423 info.colorimetry.primaries = cinfo->primaries;
3424 if (info.colorimetry.range == GST_VIDEO_COLOR_RANGE_UNKNOWN)
3425 info.colorimetry.range = cinfo->range;
3426 if (info.colorimetry.matrix == GST_VIDEO_COLOR_MATRIX_UNKNOWN)
3427 info.colorimetry.matrix = cinfo->matrix;
3428 if (info.colorimetry.transfer == GST_VIDEO_TRANSFER_UNKNOWN)
3429 info.colorimetry.transfer = cinfo->transfer;
3431 if (gst_video_colorimetry_is_equal (&info.colorimetry, cinfo))
3434 /* Allow 1:4:0:0 (produced by jpegdec) if the device expects 1:4:7:1 */
3435 if (gst_video_colorimetry_is_equal (&info.colorimetry, &ci_likely_jpeg)
3436 && gst_video_colorimetry_is_equal (cinfo, &ci_jpeg))
3442 static const gchar *
3443 field_to_str (enum v4l2_field f)
3446 case V4L2_FIELD_ANY:
3448 case V4L2_FIELD_NONE:
3450 case V4L2_FIELD_TOP:
3452 case V4L2_FIELD_BOTTOM:
3454 case V4L2_FIELD_INTERLACED:
3455 return "interlaced";
3456 case V4L2_FIELD_SEQ_TB:
3458 case V4L2_FIELD_SEQ_BT:
3460 case V4L2_FIELD_ALTERNATE:
3462 case V4L2_FIELD_INTERLACED_TB:
3463 return "interlaced-tb";
3464 case V4L2_FIELD_INTERLACED_BT:
3465 return "interlaced-bt";
3472 gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
3473 gboolean try_only, GstV4l2Error * error)
3475 gint fd = v4l2object->video_fd;
3476 struct v4l2_format format;
3477 struct v4l2_streamparm streamparm;
3478 enum v4l2_field field;
3479 guint32 pixelformat;
3480 struct v4l2_fmtdesc *fmtdesc;
3482 GstVideoAlignment align;
3483 gint width, height, fps_n, fps_d;
3487 enum v4l2_colorspace colorspace = 0;
3488 enum v4l2_quantization range = 0;
3489 enum v4l2_ycbcr_encoding matrix = 0;
3490 enum v4l2_xfer_func transfer = 0;
3492 gboolean disable_interlacing = FALSE;
3493 gboolean disable_colorimetry = FALSE;
3495 g_return_val_if_fail (!v4l2object->skip_try_fmt_probes ||
3496 gst_caps_is_writable (caps), FALSE);
3498 GST_V4L2_CHECK_OPEN (v4l2object);
3500 GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
3502 is_mplane = V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type);
3504 gst_video_info_init (&info);
3505 gst_video_alignment_reset (&align);
3506 v4l2object->transfer = GST_VIDEO_TRANSFER_UNKNOWN;
3508 if (!gst_v4l2_object_get_caps_info (v4l2object, caps, &fmtdesc, &info))
3511 pixelformat = fmtdesc->pixelformat;
3512 width = GST_VIDEO_INFO_WIDTH (&info);
3513 height = GST_VIDEO_INFO_FIELD_HEIGHT (&info);
3514 fps_n = GST_VIDEO_INFO_FPS_N (&info);
3515 fps_d = GST_VIDEO_INFO_FPS_D (&info);
3517 /* if encoded format (GST_VIDEO_INFO_N_PLANES return 0)
3518 * or if contiguous is preferred */
3519 n_v4l_planes = GST_VIDEO_INFO_N_PLANES (&info);
3520 if (!n_v4l_planes || !v4l2object->prefered_non_contiguous)
3523 field = get_v4l2_field_for_info (&info);
3524 if (field != V4L2_FIELD_NONE)
3525 GST_DEBUG_OBJECT (v4l2object->element, "interlaced video");
3527 GST_DEBUG_OBJECT (v4l2object->element, "progressive video");
3529 /* We first pick the main colorspace from the primaries */
3530 switch (info.colorimetry.primaries) {
3531 case GST_VIDEO_COLOR_PRIMARIES_BT709:
3532 /* There is two colorspaces using these primaries, use the range to
3534 if (info.colorimetry.range == GST_VIDEO_COLOR_RANGE_16_235)
3535 colorspace = V4L2_COLORSPACE_REC709;
3537 colorspace = V4L2_COLORSPACE_SRGB;
3539 case GST_VIDEO_COLOR_PRIMARIES_BT2020:
3540 colorspace = V4L2_COLORSPACE_BT2020;
3542 case GST_VIDEO_COLOR_PRIMARIES_BT470M:
3543 colorspace = V4L2_COLORSPACE_470_SYSTEM_M;
3545 case GST_VIDEO_COLOR_PRIMARIES_BT470BG:
3546 colorspace = V4L2_COLORSPACE_470_SYSTEM_BG;
3548 case GST_VIDEO_COLOR_PRIMARIES_SMPTE170M:
3549 colorspace = V4L2_COLORSPACE_SMPTE170M;
3551 case GST_VIDEO_COLOR_PRIMARIES_SMPTE240M:
3552 colorspace = V4L2_COLORSPACE_SMPTE240M;
3555 case GST_VIDEO_COLOR_PRIMARIES_FILM:
3556 case GST_VIDEO_COLOR_PRIMARIES_UNKNOWN:
3557 /* We don't know, we will guess */
3561 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3562 "Unknown colorimetry primaries %d", info.colorimetry.primaries);
3566 switch (info.colorimetry.range) {
3567 case GST_VIDEO_COLOR_RANGE_0_255:
3568 range = V4L2_QUANTIZATION_FULL_RANGE;
3570 case GST_VIDEO_COLOR_RANGE_16_235:
3571 range = V4L2_QUANTIZATION_LIM_RANGE;
3573 case GST_VIDEO_COLOR_RANGE_UNKNOWN:
3574 /* We let the driver pick a default one */
3577 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3578 "Unknown colorimetry range %d", info.colorimetry.range);
3582 switch (info.colorimetry.matrix) {
3583 case GST_VIDEO_COLOR_MATRIX_RGB:
3584 /* Unspecified, leave to default */
3586 /* FCC is about the same as BT601 with less digit */
3587 case GST_VIDEO_COLOR_MATRIX_FCC:
3588 case GST_VIDEO_COLOR_MATRIX_BT601:
3589 matrix = V4L2_YCBCR_ENC_601;
3591 case GST_VIDEO_COLOR_MATRIX_BT709:
3592 matrix = V4L2_YCBCR_ENC_709;
3594 case GST_VIDEO_COLOR_MATRIX_SMPTE240M:
3595 matrix = V4L2_YCBCR_ENC_SMPTE240M;
3597 case GST_VIDEO_COLOR_MATRIX_BT2020:
3598 matrix = V4L2_YCBCR_ENC_BT2020;
3600 case GST_VIDEO_COLOR_MATRIX_UNKNOWN:
3601 /* We let the driver pick a default one */
3604 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3605 "Unknown colorimetry matrix %d", info.colorimetry.matrix);
3609 switch (info.colorimetry.transfer) {
3610 case GST_VIDEO_TRANSFER_GAMMA18:
3611 case GST_VIDEO_TRANSFER_GAMMA20:
3612 case GST_VIDEO_TRANSFER_GAMMA22:
3613 case GST_VIDEO_TRANSFER_GAMMA28:
3614 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3615 "GAMMA 18, 20, 22, 28 transfer functions not supported");
3617 case GST_VIDEO_TRANSFER_GAMMA10:
3618 transfer = V4L2_XFER_FUNC_NONE;
3620 case GST_VIDEO_TRANSFER_SMPTE2084:
3621 transfer = V4L2_XFER_FUNC_SMPTE2084;
3623 case GST_VIDEO_TRANSFER_BT601:
3624 case GST_VIDEO_TRANSFER_BT2020_12:
3625 case GST_VIDEO_TRANSFER_BT2020_10:
3626 case GST_VIDEO_TRANSFER_BT709:
3627 v4l2object->transfer = info.colorimetry.transfer;
3628 transfer = V4L2_XFER_FUNC_709;
3630 case GST_VIDEO_TRANSFER_SMPTE240M:
3631 transfer = V4L2_XFER_FUNC_SMPTE240M;
3633 case GST_VIDEO_TRANSFER_SRGB:
3634 transfer = V4L2_XFER_FUNC_SRGB;
3636 case GST_VIDEO_TRANSFER_LOG100:
3637 case GST_VIDEO_TRANSFER_LOG316:
3638 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3639 "LOG 100, 316 transfer functions not supported");
3640 /* FIXME No known sensible default, maybe AdobeRGB ? */
3642 case GST_VIDEO_TRANSFER_UNKNOWN:
3643 /* We let the driver pick a default one */
3646 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3647 "Unknown colorimetry transfer %d", info.colorimetry.transfer);
3651 if (colorspace == 0) {
3652 /* Try to guess colorspace according to pixelformat and size */
3653 if (GST_VIDEO_INFO_IS_YUV (&info)) {
3654 if (range == V4L2_QUANTIZATION_FULL_RANGE
3655 && matrix == V4L2_YCBCR_ENC_601 && transfer == 0) {
3656 /* Full range BT.601 YCbCr encoding with unknown primaries and transfer
3657 * function most likely is JPEG */
3658 colorspace = V4L2_COLORSPACE_JPEG;
3659 transfer = V4L2_XFER_FUNC_SRGB;
3661 /* SD streams likely use SMPTE170M and HD streams REC709 */
3662 if (width <= 720 && GST_VIDEO_INFO_HEIGHT (&info) <= 576)
3663 colorspace = V4L2_COLORSPACE_SMPTE170M;
3665 colorspace = V4L2_COLORSPACE_REC709;
3667 } else if (GST_VIDEO_INFO_IS_RGB (&info)) {
3668 colorspace = V4L2_COLORSPACE_SRGB;
3669 transfer = V4L2_XFER_FUNC_NONE;
3673 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired format %dx%d, format "
3674 "%" GST_FOURCC_FORMAT " stride: %d", width, height,
3675 GST_FOURCC_ARGS (pixelformat), GST_VIDEO_INFO_PLANE_STRIDE (&info, 0));
3677 memset (&format, 0x00, sizeof (struct v4l2_format));
3678 format.type = v4l2object->type;
3681 format.type = v4l2object->type;
3682 format.fmt.pix_mp.pixelformat = pixelformat;
3683 format.fmt.pix_mp.width = width;
3684 format.fmt.pix_mp.height = height;
3685 format.fmt.pix_mp.field = field;
3686 format.fmt.pix_mp.num_planes = n_v4l_planes;
3688 /* try to ask our preferred stride but it's not a failure if not
3690 for (i = 0; i < n_v4l_planes; i++) {
3691 gint stride = GST_VIDEO_INFO_PLANE_STRIDE (&info, i);
3693 if (GST_VIDEO_FORMAT_INFO_IS_TILED (info.finfo))
3694 stride = GST_VIDEO_TILE_X_TILES (stride) <<
3695 GST_VIDEO_FORMAT_INFO_TILE_WS (info.finfo);
3697 format.fmt.pix_mp.plane_fmt[i].bytesperline = stride;
3700 if (GST_VIDEO_INFO_FORMAT (&info) == GST_VIDEO_FORMAT_ENCODED)
3701 format.fmt.pix_mp.plane_fmt[0].sizeimage = ENCODED_BUFFER_SIZE;
3703 gint stride = GST_VIDEO_INFO_PLANE_STRIDE (&info, 0);
3705 format.type = v4l2object->type;
3707 format.fmt.pix.width = width;
3708 format.fmt.pix.height = height;
3709 format.fmt.pix.pixelformat = pixelformat;
3710 format.fmt.pix.field = field;
3712 if (GST_VIDEO_FORMAT_INFO_IS_TILED (info.finfo))
3713 stride = GST_VIDEO_TILE_X_TILES (stride) <<
3714 GST_VIDEO_FORMAT_INFO_TILE_WS (info.finfo);
3716 /* try to ask our preferred stride */
3717 format.fmt.pix.bytesperline = stride;
3719 if (GST_VIDEO_INFO_FORMAT (&info) == GST_VIDEO_FORMAT_ENCODED)
3720 format.fmt.pix.sizeimage = ENCODED_BUFFER_SIZE;
3723 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired format is %dx%d, format "
3724 "%" GST_FOURCC_FORMAT ", nb planes %d", format.fmt.pix.width,
3725 format.fmt.pix_mp.height,
3726 GST_FOURCC_ARGS (format.fmt.pix.pixelformat),
3727 is_mplane ? format.fmt.pix_mp.num_planes : 1);
3729 #ifndef GST_DISABLE_GST_DEBUG
3731 for (i = 0; i < format.fmt.pix_mp.num_planes; i++)
3732 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d",
3733 format.fmt.pix_mp.plane_fmt[i].bytesperline);
3735 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d",
3736 format.fmt.pix.bytesperline);
3741 format.fmt.pix_mp.colorspace = colorspace;
3742 format.fmt.pix_mp.quantization = range;
3743 format.fmt.pix_mp.ycbcr_enc = matrix;
3744 format.fmt.pix_mp.xfer_func = transfer;
3746 format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
3747 format.fmt.pix.colorspace = colorspace;
3748 format.fmt.pix.quantization = range;
3749 format.fmt.pix.ycbcr_enc = matrix;
3750 format.fmt.pix.xfer_func = transfer;
3753 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired colorspace is %d:%d:%d:%d",
3754 colorspace, range, matrix, transfer);
3757 if (v4l2object->ioctl (fd, VIDIOC_TRY_FMT, &format) < 0)
3758 goto try_fmt_failed;
3760 if (v4l2object->ioctl (fd, VIDIOC_S_FMT, &format) < 0)
3761 goto set_fmt_failed;
3765 colorspace = format.fmt.pix_mp.colorspace;
3766 range = format.fmt.pix_mp.quantization;
3767 matrix = format.fmt.pix_mp.ycbcr_enc;
3768 transfer = format.fmt.pix_mp.xfer_func;
3770 colorspace = format.fmt.pix.colorspace;
3771 range = format.fmt.pix.quantization;
3772 matrix = format.fmt.pix.ycbcr_enc;
3773 transfer = format.fmt.pix.xfer_func;
3776 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got format of %dx%d, format "
3777 "%" GST_FOURCC_FORMAT ", nb planes %d, colorspace %d:%d:%d:%d field: %s",
3778 format.fmt.pix.width, format.fmt.pix_mp.height,
3779 GST_FOURCC_ARGS (format.fmt.pix.pixelformat),
3780 is_mplane ? format.fmt.pix_mp.num_planes : 1,
3781 colorspace, range, matrix, transfer, field_to_str (format.fmt.pix.field));
3783 #ifndef GST_DISABLE_GST_DEBUG
3785 for (i = 0; i < format.fmt.pix_mp.num_planes; i++)
3786 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d, sizeimage %d",
3787 format.fmt.pix_mp.plane_fmt[i].bytesperline,
3788 format.fmt.pix_mp.plane_fmt[i].sizeimage);
3790 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d, sizeimage %d",
3791 format.fmt.pix.bytesperline, format.fmt.pix.sizeimage);
3795 if (format.fmt.pix.pixelformat != pixelformat)
3796 goto invalid_pixelformat;
3798 /* Only negotiate size with raw data.
3799 * For some codecs the dimensions are *not* in the bitstream, IIRC VC1
3800 * in ASF mode for example, there is also not reason for a driver to
3801 * change the size. */
3802 if (info.finfo->format != GST_VIDEO_FORMAT_ENCODED) {
3803 /* We can crop larger images */
3804 if (format.fmt.pix.width < width || format.fmt.pix.height < height)
3805 goto invalid_dimensions;
3807 /* Note, this will be adjusted if upstream has non-centered cropping. */
3808 align.padding_top = 0;
3809 align.padding_bottom = format.fmt.pix.height - height;
3810 align.padding_left = 0;
3811 align.padding_right = format.fmt.pix.width - width;
3814 if (is_mplane && format.fmt.pix_mp.num_planes != n_v4l_planes)
3815 goto invalid_planes;
3817 /* used to check colorimetry and interlace mode fields presence */
3818 s = gst_caps_get_structure (caps, 0);
3820 if (gst_v4l2_object_get_interlace_mode (format.fmt.pix.field,
3821 &info.interlace_mode)) {
3822 if (gst_structure_has_field (s, "interlace-mode")) {
3823 if (format.fmt.pix.field != field)
3827 /* The driver (or libv4l2) is miss-behaving, just ignore interlace-mode from
3829 disable_interlacing = TRUE;
3830 if (gst_structure_has_field (s, "interlace-mode"))
3831 gst_structure_remove_field (s, "interlace-mode");
3834 if (gst_v4l2_object_get_colorspace (v4l2object, &format, &info.colorimetry)) {
3835 if (gst_structure_has_field (s, "colorimetry")) {
3836 if (!gst_v4l2_video_colorimetry_matches (&info.colorimetry, caps))
3837 goto invalid_colorimetry;
3840 /* The driver (or libv4l2) is miss-behaving, just ignore colorimetry from
3842 disable_colorimetry = TRUE;
3843 if (gst_structure_has_field (s, "colorimetry"))
3844 gst_structure_remove_field (s, "colorimetry");
3847 /* In case we have skipped the try_fmt probes, we'll need to set the
3848 * interlace-mode and colorimetry back into the caps. */
3849 if (v4l2object->skip_try_fmt_probes) {
3850 if (!disable_interlacing && !gst_structure_has_field (s, "interlace-mode")) {
3851 gst_structure_set (s, "interlace-mode", G_TYPE_STRING,
3852 gst_video_interlace_mode_to_string (info.interlace_mode), NULL);
3854 if (!disable_colorimetry && !gst_structure_has_field (s, "colorimetry")) {
3855 gchar *str = gst_video_colorimetry_to_string (&info.colorimetry);
3856 gst_structure_set (s, "colorimetry", G_TYPE_STRING, str, NULL);
3861 if (try_only) /* good enough for trying only */
3864 if (GST_VIDEO_INFO_HAS_ALPHA (&info)) {
3865 struct v4l2_control ctl = { 0, };
3866 ctl.id = V4L2_CID_ALPHA_COMPONENT;
3869 if (v4l2object->ioctl (fd, VIDIOC_S_CTRL, &ctl) < 0)
3870 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3871 "Failed to set alpha component value");
3874 /* Is there a reason we require the caller to always specify a framerate? */
3875 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired framerate: %u/%u", fps_n,
3878 memset (&streamparm, 0x00, sizeof (struct v4l2_streamparm));
3879 streamparm.type = v4l2object->type;
3881 if (v4l2object->ioctl (fd, VIDIOC_G_PARM, &streamparm) < 0)
3882 goto get_parm_failed;
3884 if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE
3885 || v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
3886 GST_VIDEO_INFO_FPS_N (&info) =
3887 streamparm.parm.capture.timeperframe.denominator;
3888 GST_VIDEO_INFO_FPS_D (&info) =
3889 streamparm.parm.capture.timeperframe.numerator;
3891 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got capture framerate: %u/%u",
3892 streamparm.parm.capture.timeperframe.denominator,
3893 streamparm.parm.capture.timeperframe.numerator);
3895 /* We used to skip frame rate setup if the camera was already setup
3896 * with the requested frame rate. This breaks some cameras though,
3897 * causing them to not output data (several models of Thinkpad cameras
3898 * have this problem at least).
3899 * So, don't skip. */
3900 GST_LOG_OBJECT (v4l2object->dbg_obj, "Setting capture framerate to %u/%u",
3902 /* We want to change the frame rate, so check whether we can. Some cheap USB
3903 * cameras don't have the capability */
3904 if ((streamparm.parm.capture.capability & V4L2_CAP_TIMEPERFRAME) == 0) {
3905 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
3906 "Not setting capture framerate (not supported)");
3910 /* Note: V4L2 wants the frame interval, we have the frame rate */
3911 streamparm.parm.capture.timeperframe.numerator = fps_d;
3912 streamparm.parm.capture.timeperframe.denominator = fps_n;
3914 /* some cheap USB cam's won't accept any change */
3915 if (v4l2object->ioctl (fd, VIDIOC_S_PARM, &streamparm) < 0)
3916 goto set_parm_failed;
3918 if (streamparm.parm.capture.timeperframe.numerator > 0 &&
3919 streamparm.parm.capture.timeperframe.denominator > 0) {
3920 /* get new values */
3921 fps_d = streamparm.parm.capture.timeperframe.numerator;
3922 fps_n = streamparm.parm.capture.timeperframe.denominator;
3924 GST_INFO_OBJECT (v4l2object->dbg_obj, "Set capture framerate to %u/%u",
3927 /* fix v4l2 capture driver to provide framerate values */
3928 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3929 "Reuse caps framerate %u/%u - fix v4l2 capture driver", fps_n, fps_d);
3932 GST_VIDEO_INFO_FPS_N (&info) = fps_n;
3933 GST_VIDEO_INFO_FPS_D (&info) = fps_d;
3934 } else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT
3935 || v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
3936 GST_VIDEO_INFO_FPS_N (&info) =
3937 streamparm.parm.output.timeperframe.denominator;
3938 GST_VIDEO_INFO_FPS_D (&info) =
3939 streamparm.parm.output.timeperframe.numerator;
3941 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got output framerate: %u/%u",
3942 streamparm.parm.output.timeperframe.denominator,
3943 streamparm.parm.output.timeperframe.numerator);
3945 GST_LOG_OBJECT (v4l2object->dbg_obj, "Setting output framerate to %u/%u",
3947 if ((streamparm.parm.output.capability & V4L2_CAP_TIMEPERFRAME) == 0) {
3948 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
3949 "Not setting output framerate (not supported)");
3953 /* Note: V4L2 wants the frame interval, we have the frame rate */
3954 streamparm.parm.output.timeperframe.numerator = fps_d;
3955 streamparm.parm.output.timeperframe.denominator = fps_n;
3957 if (v4l2object->ioctl (fd, VIDIOC_S_PARM, &streamparm) < 0)
3958 goto set_parm_failed;
3960 if (streamparm.parm.output.timeperframe.numerator > 0 &&
3961 streamparm.parm.output.timeperframe.denominator > 0) {
3962 /* get new values */
3963 fps_d = streamparm.parm.output.timeperframe.numerator;
3964 fps_n = streamparm.parm.output.timeperframe.denominator;
3966 GST_INFO_OBJECT (v4l2object->dbg_obj, "Set output framerate to %u/%u",
3969 /* fix v4l2 output driver to provide framerate values */
3970 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3971 "Reuse caps framerate %u/%u - fix v4l2 output driver", fps_n, fps_d);
3974 GST_VIDEO_INFO_FPS_N (&info) = fps_n;
3975 GST_VIDEO_INFO_FPS_D (&info) = fps_d;
3979 /* add boolean return, so we can fail on drivers bugs */
3980 gst_v4l2_object_save_format (v4l2object, fmtdesc, &format, &info, &align);
3982 /* now configure the pool */
3983 if (!gst_v4l2_object_setup_pool (v4l2object, caps))
3991 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "can't parse caps %" GST_PTR_FORMAT,
3994 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3995 (_("Invalid caps")), ("Can't parse caps %" GST_PTR_FORMAT, caps));
4000 if (errno == EINVAL) {
4001 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
4002 (_("Device '%s' has no supported format"), v4l2object->videodev),
4003 ("Call to TRY_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
4004 GST_FOURCC_ARGS (pixelformat), width, height,
4005 g_strerror (errno)));
4007 GST_V4L2_ERROR (error, RESOURCE, FAILED,
4008 (_("Device '%s' failed during initialization"),
4009 v4l2object->videodev),
4010 ("Call to TRY_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
4011 GST_FOURCC_ARGS (pixelformat), width, height,
4012 g_strerror (errno)));
4018 if (errno == EBUSY) {
4019 GST_V4L2_ERROR (error, RESOURCE, BUSY,
4020 (_("Device '%s' is busy"), v4l2object->videodev),
4021 ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
4022 GST_FOURCC_ARGS (pixelformat), width, height,
4023 g_strerror (errno)));
4024 } else if (errno == EINVAL) {
4025 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
4026 (_("Device '%s' has no supported format"), v4l2object->videodev),
4027 ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
4028 GST_FOURCC_ARGS (pixelformat), width, height,
4029 g_strerror (errno)));
4031 GST_V4L2_ERROR (error, RESOURCE, FAILED,
4032 (_("Device '%s' failed during initialization"),
4033 v4l2object->videodev),
4034 ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
4035 GST_FOURCC_ARGS (pixelformat), width, height,
4036 g_strerror (errno)));
4042 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
4043 (_("Device '%s' cannot capture at %dx%d"),
4044 v4l2object->videodev, width, height),
4045 ("Tried to capture at %dx%d, but device returned size %dx%d",
4046 width, height, format.fmt.pix.width, format.fmt.pix.height));
4049 invalid_pixelformat:
4051 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
4052 (_("Device '%s' cannot capture in the specified format"),
4053 v4l2object->videodev),
4054 ("Tried to capture in %" GST_FOURCC_FORMAT
4055 ", but device returned format" " %" GST_FOURCC_FORMAT,
4056 GST_FOURCC_ARGS (pixelformat),
4057 GST_FOURCC_ARGS (format.fmt.pix.pixelformat)));
4062 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
4063 (_("Device '%s' does support non-contiguous planes"),
4064 v4l2object->videodev),
4065 ("Device wants %d planes", format.fmt.pix_mp.num_planes));
4070 enum v4l2_field wanted_field;
4073 wanted_field = format.fmt.pix_mp.field;
4075 wanted_field = format.fmt.pix.field;
4077 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
4078 (_("Device '%s' does not support %s interlacing"),
4079 v4l2object->videodev,
4080 field == V4L2_FIELD_NONE ? "progressive" : "interleaved"),
4081 ("Device wants %s interlacing",
4082 wanted_field == V4L2_FIELD_NONE ? "progressive" : "interleaved"));
4085 invalid_colorimetry:
4087 gchar *wanted_colorimetry;
4089 wanted_colorimetry = gst_video_colorimetry_to_string (&info.colorimetry);
4091 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
4092 (_("Device '%s' does not support %s colorimetry"),
4093 v4l2object->videodev, gst_structure_get_string (s, "colorimetry")),
4094 ("Device wants %s colorimetry", wanted_colorimetry));
4096 g_free (wanted_colorimetry);
4101 /* it's possible that this call is not supported */
4102 if (errno != EINVAL && errno != ENOTTY) {
4103 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
4104 (_("Could not get parameters on device '%s'"),
4105 v4l2object->videodev), GST_ERROR_SYSTEM);
4111 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
4112 (_("Video device did not accept new frame rate setting.")),
4118 /* setup_pool already send the error */
4124 gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps,
4125 GstV4l2Error * error)
4127 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Setting format to %" GST_PTR_FORMAT,
4129 return gst_v4l2_object_set_format_full (v4l2object, caps, FALSE, error);
4133 gst_v4l2_object_try_format (GstV4l2Object * v4l2object, GstCaps * caps,
4134 GstV4l2Error * error)
4136 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Trying format %" GST_PTR_FORMAT,
4138 return gst_v4l2_object_set_format_full (v4l2object, caps, TRUE, error);
4142 * gst_v4l2_object_acquire_format:
4143 * @v4l2object: the object
4144 * @info: a GstVideoInfo to be filled
4146 * Acquire the driver chosen format. This is useful in decoder or encoder elements where
4147 * the output format is chosen by the HW.
4149 * Returns: %TRUE on success, %FALSE on failure.
4152 gst_v4l2_object_acquire_format (GstV4l2Object * v4l2object, GstVideoInfo * info)
4154 struct v4l2_fmtdesc *fmtdesc;
4155 struct v4l2_format fmt;
4156 struct v4l2_crop crop;
4157 struct v4l2_selection sel;
4158 struct v4l2_rect *r = NULL;
4159 GstVideoFormat format;
4160 guint width, height;
4161 GstVideoAlignment align;
4162 GstVideoInterlaceMode interlace_mode;
4164 gst_video_info_init (info);
4165 gst_video_alignment_reset (&align);
4167 memset (&fmt, 0x00, sizeof (struct v4l2_format));
4168 fmt.type = v4l2object->type;
4169 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_FMT, &fmt) < 0)
4170 goto get_fmt_failed;
4172 fmtdesc = gst_v4l2_object_get_format_from_fourcc (v4l2object,
4173 fmt.fmt.pix.pixelformat);
4174 if (fmtdesc == NULL)
4175 goto unsupported_format;
4177 /* No need to care about mplane, the four first params are the same */
4178 format = gst_v4l2_object_v4l2fourcc_to_video_format (fmt.fmt.pix.pixelformat);
4180 /* fails if we do no translate the fmt.pix.pixelformat to GstVideoFormat */
4181 if (format == GST_VIDEO_FORMAT_UNKNOWN)
4182 goto unsupported_format;
4184 if (fmt.fmt.pix.width == 0 || fmt.fmt.pix.height == 0)
4185 goto invalid_dimensions;
4187 width = fmt.fmt.pix.width;
4188 height = fmt.fmt.pix.height;
4190 /* Use the default compose rectangle */
4191 memset (&sel, 0, sizeof (struct v4l2_selection));
4192 sel.type = v4l2object->type;
4193 sel.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
4194 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_SELECTION, &sel) >= 0) {
4197 /* For ancient kernels, fall back to G_CROP */
4198 memset (&crop, 0, sizeof (struct v4l2_crop));
4199 crop.type = v4l2object->type;
4200 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CROP, &crop) >= 0)
4204 align.padding_left = r->left;
4205 align.padding_top = r->top;
4206 align.padding_right = width - r->width - r->left;
4207 align.padding_bottom = height - r->height - r->top;
4212 switch (fmt.fmt.pix.field) {
4213 case V4L2_FIELD_ANY:
4214 case V4L2_FIELD_NONE:
4215 interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
4217 case V4L2_FIELD_INTERLACED:
4218 case V4L2_FIELD_INTERLACED_TB:
4219 case V4L2_FIELD_INTERLACED_BT:
4220 interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
4222 case V4L2_FIELD_ALTERNATE:
4223 interlace_mode = GST_VIDEO_INTERLACE_MODE_ALTERNATE;
4226 goto unsupported_field;
4229 gst_video_info_set_interlaced_format (info, format, interlace_mode, width,
4232 gst_v4l2_object_get_colorspace (v4l2object, &fmt, &info->colorimetry);
4233 gst_v4l2_object_get_streamparm (v4l2object, info);
4234 if ((info->fps_n == 0 && v4l2object->info.fps_d != 0)
4235 && (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE
4236 || v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) {
4237 info->fps_d = v4l2object->info.fps_d;
4238 info->fps_n = v4l2object->info.fps_n;
4239 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Set capture fps to %d/%d",
4240 info->fps_n, info->fps_d);
4243 gst_v4l2_object_save_format (v4l2object, fmtdesc, &fmt, info, &align);
4245 /* Shall we setup the pool ? */
4251 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
4252 (_("Video device did not provide output format.")), GST_ERROR_SYSTEM);
4257 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
4258 (_("Video device returned invalid dimensions.")),
4259 ("Expected non 0 dimensions, got %dx%d", fmt.fmt.pix.width,
4260 fmt.fmt.pix.height));
4265 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
4266 (_("Video device uses an unsupported interlacing method.")),
4267 ("V4L2 field type %d not supported", fmt.fmt.pix.field));
4272 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
4273 (_("Video device uses an unsupported pixel format.")),
4274 ("V4L2 format %" GST_FOURCC_FORMAT " not supported",
4275 GST_FOURCC_ARGS (fmt.fmt.pix.pixelformat)));
4281 gst_v4l2_object_set_crop (GstV4l2Object * obj)
4283 struct v4l2_selection sel = { 0 };
4284 struct v4l2_crop crop = { 0 };
4286 sel.type = obj->type;
4287 sel.target = V4L2_SEL_TGT_CROP;
4289 sel.r.left = obj->align.padding_left;
4290 sel.r.top = obj->align.padding_top;
4291 sel.r.width = obj->info.width;
4292 sel.r.height = GST_VIDEO_INFO_FIELD_HEIGHT (&obj->info);
4294 crop.type = obj->type;
4297 if (obj->align.padding_left + obj->align.padding_top +
4298 obj->align.padding_right + obj->align.padding_bottom == 0) {
4299 GST_DEBUG_OBJECT (obj->dbg_obj, "no cropping needed");
4303 GST_DEBUG_OBJECT (obj->dbg_obj,
4304 "Desired cropping left %u, top %u, size %ux%u", crop.c.left, crop.c.top,
4305 crop.c.width, crop.c.height);
4307 if (obj->ioctl (obj->video_fd, VIDIOC_S_SELECTION, &sel) < 0) {
4308 if (errno != ENOTTY) {
4309 GST_WARNING_OBJECT (obj->dbg_obj,
4310 "Failed to set crop rectangle with VIDIOC_S_SELECTION: %s",
4311 g_strerror (errno));
4314 if (obj->ioctl (obj->video_fd, VIDIOC_S_CROP, &crop) < 0) {
4315 GST_WARNING_OBJECT (obj->dbg_obj, "VIDIOC_S_CROP failed");
4319 if (obj->ioctl (obj->video_fd, VIDIOC_G_CROP, &crop) < 0) {
4320 GST_WARNING_OBJECT (obj->dbg_obj, "VIDIOC_G_CROP failed");
4328 GST_DEBUG_OBJECT (obj->dbg_obj,
4329 "Got cropping left %u, top %u, size %ux%u", crop.c.left, crop.c.top,
4330 crop.c.width, crop.c.height);
4336 gst_v4l2_object_caps_equal (GstV4l2Object * v4l2object, GstCaps * caps)
4338 GstStructure *config;
4342 if (!v4l2object->pool)
4345 config = gst_buffer_pool_get_config (v4l2object->pool);
4346 gst_buffer_pool_config_get_params (config, &oldcaps, NULL, NULL, NULL);
4348 ret = oldcaps && gst_caps_is_equal (caps, oldcaps);
4350 gst_structure_free (config);
4356 gst_v4l2_object_caps_is_subset (GstV4l2Object * v4l2object, GstCaps * caps)
4358 GstStructure *config;
4362 if (!v4l2object->pool)
4365 config = gst_buffer_pool_get_config (v4l2object->pool);
4366 gst_buffer_pool_config_get_params (config, &oldcaps, NULL, NULL, NULL);
4368 ret = oldcaps && gst_caps_is_subset (oldcaps, caps);
4370 gst_structure_free (config);
4376 gst_v4l2_object_get_current_caps (GstV4l2Object * v4l2object)
4378 GstStructure *config;
4381 if (!v4l2object->pool)
4384 config = gst_buffer_pool_get_config (v4l2object->pool);
4385 gst_buffer_pool_config_get_params (config, &oldcaps, NULL, NULL, NULL);
4388 gst_caps_ref (oldcaps);
4390 gst_structure_free (config);
4396 gst_v4l2_object_unlock (GstV4l2Object * v4l2object)
4398 gboolean ret = TRUE;
4400 GST_LOG_OBJECT (v4l2object->dbg_obj, "start flushing");
4402 if (v4l2object->pool && gst_buffer_pool_is_active (v4l2object->pool))
4403 gst_buffer_pool_set_flushing (v4l2object->pool, TRUE);
4409 gst_v4l2_object_unlock_stop (GstV4l2Object * v4l2object)
4411 gboolean ret = TRUE;
4413 GST_LOG_OBJECT (v4l2object->dbg_obj, "stop flushing");
4415 if (v4l2object->pool && gst_buffer_pool_is_active (v4l2object->pool))
4416 gst_buffer_pool_set_flushing (v4l2object->pool, FALSE);
4422 gst_v4l2_object_stop (GstV4l2Object * v4l2object)
4424 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "stopping");
4426 if (!GST_V4L2_IS_OPEN (v4l2object))
4428 if (!GST_V4L2_IS_ACTIVE (v4l2object))
4431 if (v4l2object->pool) {
4432 if (!gst_v4l2_buffer_pool_orphan (&v4l2object->pool)) {
4433 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "deactivating pool");
4434 gst_buffer_pool_set_active (v4l2object->pool, FALSE);
4435 gst_object_unref (v4l2object->pool);
4437 v4l2object->pool = NULL;
4440 GST_V4L2_SET_INACTIVE (v4l2object);
4447 gst_v4l2_object_probe_caps (GstV4l2Object * v4l2object, GstCaps * filter)
4453 formats = gst_v4l2_object_get_format_list (v4l2object);
4455 ret = gst_caps_new_empty ();
4457 if (v4l2object->keep_aspect && !v4l2object->par) {
4458 struct v4l2_cropcap cropcap;
4460 memset (&cropcap, 0, sizeof (cropcap));
4462 cropcap.type = v4l2object->type;
4463 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_CROPCAP, &cropcap) < 0) {
4464 if (errno != ENOTTY)
4465 GST_WARNING_OBJECT (v4l2object->dbg_obj,
4466 "Failed to probe pixel aspect ratio with VIDIOC_CROPCAP: %s",
4467 g_strerror (errno));
4468 } else if (cropcap.pixelaspect.numerator && cropcap.pixelaspect.denominator) {
4469 v4l2object->par = g_new0 (GValue, 1);
4470 g_value_init (v4l2object->par, GST_TYPE_FRACTION);
4471 gst_value_set_fraction (v4l2object->par, cropcap.pixelaspect.numerator,
4472 cropcap.pixelaspect.denominator);
4476 for (walk = formats; walk; walk = walk->next) {
4477 struct v4l2_fmtdesc *format;
4478 GstStructure *template;
4481 format = (struct v4l2_fmtdesc *) walk->data;
4483 template = gst_v4l2_object_v4l2fourcc_to_bare_struct (format->pixelformat);
4486 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
4487 "unknown format %" GST_FOURCC_FORMAT,
4488 GST_FOURCC_ARGS (format->pixelformat));
4492 /* If we have a filter, check if we need to probe this format or not */
4494 GstCaps *format_caps = gst_caps_new_empty ();
4496 gst_caps_append_structure (format_caps, gst_structure_copy (template));
4498 if (!gst_caps_can_intersect (format_caps, filter)) {
4499 gst_caps_unref (format_caps);
4500 gst_structure_free (template);
4504 gst_caps_unref (format_caps);
4507 tmp = gst_v4l2_object_probe_caps_for_format (v4l2object,
4508 format->pixelformat, template);
4510 gst_caps_append (ret, tmp);
4512 /* Add a variant of the caps with the Interlaced feature so we can negotiate it if needed */
4513 add_alternate_variant (v4l2object, ret, gst_caps_get_structure (ret,
4514 gst_caps_get_size (ret) - 1));
4517 gst_structure_free (template);
4524 ret = gst_caps_intersect_full (filter, ret, GST_CAPS_INTERSECT_FIRST);
4525 gst_caps_unref (tmp);
4528 GST_INFO_OBJECT (v4l2object->dbg_obj, "probed caps: %" GST_PTR_FORMAT, ret);
4534 gst_v4l2_object_get_caps (GstV4l2Object * v4l2object, GstCaps * filter)
4538 if (v4l2object->probed_caps == NULL)
4539 v4l2object->probed_caps = gst_v4l2_object_probe_caps (v4l2object, NULL);
4542 ret = gst_caps_intersect_full (filter, v4l2object->probed_caps,
4543 GST_CAPS_INTERSECT_FIRST);
4545 ret = gst_caps_ref (v4l2object->probed_caps);
4552 gst_v4l2_object_match_buffer_layout (GstV4l2Object * obj, guint n_planes,
4553 gsize offset[GST_VIDEO_MAX_PLANES], gint stride[GST_VIDEO_MAX_PLANES],
4554 gsize buffer_size, guint padded_height)
4557 gboolean need_fmt_update = FALSE;
4559 if (n_planes != GST_VIDEO_INFO_N_PLANES (&obj->info)) {
4560 GST_WARNING_OBJECT (obj->dbg_obj,
4561 "Cannot match buffers with different number planes");
4565 for (p = 0; p < n_planes; p++) {
4566 if (stride[p] < obj->info.stride[p]) {
4567 GST_DEBUG_OBJECT (obj->dbg_obj,
4568 "Not matching as remote stride %i is smaller than %i on plane %u",
4569 stride[p], obj->info.stride[p], p);
4571 } else if (stride[p] > obj->info.stride[p]) {
4572 GST_LOG_OBJECT (obj->dbg_obj,
4573 "remote stride %i is higher than %i on plane %u",
4574 stride[p], obj->info.stride[p], p);
4575 need_fmt_update = TRUE;
4578 if (offset[p] < obj->info.offset[p]) {
4579 GST_DEBUG_OBJECT (obj->dbg_obj,
4580 "Not matching as offset %" G_GSIZE_FORMAT
4581 " is smaller than %" G_GSIZE_FORMAT " on plane %u",
4582 offset[p], obj->info.offset[p], p);
4584 } else if (offset[p] > obj->info.offset[p]) {
4585 GST_LOG_OBJECT (obj->dbg_obj,
4586 "Remote offset %" G_GSIZE_FORMAT
4587 " is higher than %" G_GSIZE_FORMAT " on plane %u",
4588 offset[p], obj->info.offset[p], p);
4589 need_fmt_update = TRUE;
4592 if (padded_height) {
4595 if (V4L2_TYPE_IS_MULTIPLANAR (obj->type))
4596 fmt_height = obj->format.fmt.pix_mp.height;
4598 fmt_height = obj->format.fmt.pix.height;
4600 if (padded_height > fmt_height)
4601 need_fmt_update = TRUE;
4605 if (need_fmt_update) {
4606 struct v4l2_format format;
4607 gint wanted_stride[GST_VIDEO_MAX_PLANES] = { 0, };
4609 format = obj->format;
4611 if (padded_height) {
4612 GST_DEBUG_OBJECT (obj->dbg_obj, "Padded height %u", padded_height);
4614 obj->align.padding_bottom =
4615 padded_height - GST_VIDEO_INFO_FIELD_HEIGHT (&obj->info);
4617 GST_WARNING_OBJECT (obj->dbg_obj,
4618 "Failed to compute padded height; keep the default one");
4619 padded_height = format.fmt.pix_mp.height;
4622 /* update the current format with the stride we want to import from */
4623 if (V4L2_TYPE_IS_MULTIPLANAR (obj->type)) {
4626 GST_DEBUG_OBJECT (obj->dbg_obj, "Wanted strides:");
4628 for (i = 0; i < obj->n_v4l2_planes; i++) {
4629 gint plane_stride = stride[i];
4631 if (GST_VIDEO_FORMAT_INFO_IS_TILED (obj->info.finfo))
4632 plane_stride = GST_VIDEO_TILE_X_TILES (plane_stride) <<
4633 GST_VIDEO_FORMAT_INFO_TILE_WS (obj->info.finfo);
4635 format.fmt.pix_mp.plane_fmt[i].bytesperline = plane_stride;
4636 format.fmt.pix_mp.height = padded_height;
4637 wanted_stride[i] = plane_stride;
4638 GST_DEBUG_OBJECT (obj->dbg_obj, " [%u] %i", i, wanted_stride[i]);
4641 gint plane_stride = stride[0];
4643 GST_DEBUG_OBJECT (obj->dbg_obj, "Wanted stride: %i", plane_stride);
4645 if (GST_VIDEO_FORMAT_INFO_IS_TILED (obj->info.finfo))
4646 plane_stride = GST_VIDEO_TILE_X_TILES (plane_stride) <<
4647 GST_VIDEO_FORMAT_INFO_TILE_WS (obj->info.finfo);
4649 format.fmt.pix.bytesperline = plane_stride;
4650 format.fmt.pix.height = padded_height;
4651 wanted_stride[0] = plane_stride;
4654 if (obj->ioctl (obj->video_fd, VIDIOC_S_FMT, &format) < 0) {
4655 GST_WARNING_OBJECT (obj->dbg_obj,
4656 "Something went wrong trying to update current format: %s",
4657 g_strerror (errno));
4661 gst_v4l2_object_save_format (obj, obj->fmtdesc, &format, &obj->info,
4664 if (V4L2_TYPE_IS_MULTIPLANAR (obj->type)) {
4667 for (i = 0; i < obj->n_v4l2_planes; i++) {
4668 if (format.fmt.pix_mp.plane_fmt[i].bytesperline != wanted_stride[i]) {
4669 GST_DEBUG_OBJECT (obj->dbg_obj,
4670 "[%i] Driver did not accept the new stride (wants %i, got %i)",
4671 i, wanted_stride[i], format.fmt.pix_mp.plane_fmt[i].bytesperline);
4676 if (format.fmt.pix_mp.height != padded_height) {
4677 GST_DEBUG_OBJECT (obj->dbg_obj,
4678 "Driver did not accept the padded height (wants %i, got %i)",
4679 padded_height, format.fmt.pix_mp.height);
4682 if (format.fmt.pix.bytesperline != wanted_stride[0]) {
4683 GST_DEBUG_OBJECT (obj->dbg_obj,
4684 "Driver did not accept the new stride (wants %i, got %i)",
4685 wanted_stride[0], format.fmt.pix.bytesperline);
4689 if (format.fmt.pix.height != padded_height) {
4690 GST_DEBUG_OBJECT (obj->dbg_obj,
4691 "Driver did not accept the padded height (wants %i, got %i)",
4692 padded_height, format.fmt.pix.height);
4697 if (obj->align.padding_bottom) {
4698 /* Crop because of vertical padding */
4699 GST_DEBUG_OBJECT (obj->dbg_obj, "crop because of bottom padding of %d",
4700 obj->align.padding_bottom);
4701 gst_v4l2_object_set_crop (obj);
4708 validate_video_meta_struct (GstV4l2Object * obj, const GstStructure * s)
4712 for (i = 0; i < gst_structure_n_fields (s); i++) {
4713 const gchar *name = gst_structure_nth_field_name (s, i);
4715 if (!g_str_equal (name, "padding-top")
4716 && !g_str_equal (name, "padding-bottom")
4717 && !g_str_equal (name, "padding-left")
4718 && !g_str_equal (name, "padding-right")) {
4719 GST_WARNING_OBJECT (obj->dbg_obj, "Unknown video meta field: '%s'", name);
4728 gst_v4l2_object_match_buffer_layout_from_struct (GstV4l2Object * obj,
4729 const GstStructure * s, GstCaps * caps, guint buffer_size)
4732 GstVideoAlignment align;
4733 gsize plane_size[GST_VIDEO_MAX_PLANES];
4735 if (!validate_video_meta_struct (obj, s))
4738 if (!gst_video_info_from_caps (&info, caps)) {
4739 GST_WARNING_OBJECT (obj->dbg_obj, "Failed to create video info");
4743 gst_video_alignment_reset (&align);
4745 gst_structure_get_uint (s, "padding-top", &align.padding_top);
4746 gst_structure_get_uint (s, "padding-bottom", &align.padding_bottom);
4747 gst_structure_get_uint (s, "padding-left", &align.padding_left);
4748 gst_structure_get_uint (s, "padding-right", &align.padding_right);
4750 if (align.padding_top || align.padding_bottom || align.padding_left ||
4751 align.padding_right) {
4752 GST_DEBUG_OBJECT (obj->dbg_obj,
4753 "Upstream requested padding (top: %d bottom: %d left: %d right: %d)",
4754 align.padding_top, align.padding_bottom, align.padding_left,
4755 align.padding_right);
4758 if (!gst_video_info_align_full (&info, &align, plane_size)) {
4759 GST_WARNING_OBJECT (obj->dbg_obj, "Failed to align video info");
4763 if (GST_VIDEO_INFO_SIZE (&info) != buffer_size) {
4764 GST_WARNING_OBJECT (obj->dbg_obj,
4765 "Requested buffer size (%d) doesn't match video info size (%"
4766 G_GSIZE_FORMAT ")", buffer_size, GST_VIDEO_INFO_SIZE (&info));
4770 GST_DEBUG_OBJECT (obj->dbg_obj,
4771 "try matching buffer layout requested by downstream");
4773 gst_v4l2_object_match_buffer_layout (obj, GST_VIDEO_INFO_N_PLANES (&info),
4774 info.offset, info.stride, buffer_size,
4775 GST_VIDEO_INFO_PLANE_HEIGHT (&info, 0, plane_size));
4781 gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
4784 GstBufferPool *pool = NULL, *other_pool = NULL;
4785 GstStructure *config;
4786 guint size, min, max, own_min = 0;
4788 gboolean has_video_meta;
4789 gboolean can_share_own_pool, pushing_from_our_pool = FALSE;
4790 GstAllocator *allocator = NULL;
4791 GstAllocationParams params = { 0 };
4794 GST_DEBUG_OBJECT (obj->dbg_obj, "decide allocation");
4796 g_return_val_if_fail (obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
4797 obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE, FALSE);
4799 gst_query_parse_allocation (query, &caps, NULL);
4801 if (obj->pool == NULL) {
4802 if (!gst_v4l2_object_setup_pool (obj, caps))
4806 if (gst_query_get_n_allocation_params (query) > 0)
4807 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
4809 if (gst_query_get_n_allocation_pools (query) > 0) {
4810 gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
4819 GST_DEBUG_OBJECT (obj->dbg_obj, "allocation: size:%u min:%u max:%u pool:%"
4820 GST_PTR_FORMAT, size, min, max, pool);
4823 gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE,
4826 if (has_video_meta) {
4827 const GstStructure *params;
4828 gst_query_parse_nth_allocation_meta (query, video_idx, ¶ms);
4831 gst_v4l2_object_match_buffer_layout_from_struct (obj, params, caps, size);
4834 can_share_own_pool = (has_video_meta || !obj->need_video_meta);
4836 gst_v4l2_get_driver_min_buffers (obj);
4837 /* We can't share our own pool, if it exceed V4L2 capacity */
4838 if (min + obj->min_buffers + 1 > VIDEO_MAX_FRAME)
4839 can_share_own_pool = FALSE;
4842 switch (obj->mode) {
4843 case GST_V4L2_IO_RW:
4845 /* in READ/WRITE mode, prefer a downstream pool because our own pool
4846 * doesn't help much, we have to write to it as well */
4847 GST_DEBUG_OBJECT (obj->dbg_obj,
4848 "read/write mode: using downstream pool");
4849 /* use the bigest size, when we use our own pool we can't really do any
4850 * other size than what the hardware gives us but for downstream pools
4852 size = MAX (size, obj->info.size);
4853 } else if (can_share_own_pool) {
4854 /* no downstream pool, use our own then */
4855 GST_DEBUG_OBJECT (obj->dbg_obj,
4856 "read/write mode: no downstream pool, using our own");
4857 pool = gst_object_ref (obj->pool);
4858 size = obj->info.size;
4859 pushing_from_our_pool = TRUE;
4863 case GST_V4L2_IO_USERPTR:
4864 case GST_V4L2_IO_DMABUF_IMPORT:
4865 /* in importing mode, prefer our own pool, and pass the other pool to
4866 * our own, so it can serve itself */
4868 goto no_downstream_pool;
4869 gst_v4l2_buffer_pool_set_other_pool (GST_V4L2_BUFFER_POOL (obj->pool),
4872 gst_object_unref (pool);
4873 pool = gst_object_ref (obj->pool);
4874 size = obj->info.size;
4877 case GST_V4L2_IO_MMAP:
4878 case GST_V4L2_IO_DMABUF:
4879 /* in streaming mode, prefer our own pool */
4880 /* Check if we can use it ... */
4881 if (can_share_own_pool) {
4883 gst_object_unref (pool);
4884 pool = gst_object_ref (obj->pool);
4885 size = obj->info.size;
4886 GST_DEBUG_OBJECT (obj->dbg_obj,
4887 "streaming mode: using our own pool %" GST_PTR_FORMAT, pool);
4888 pushing_from_our_pool = TRUE;
4890 GST_DEBUG_OBJECT (obj->dbg_obj,
4891 "streaming mode: copying to downstream pool %" GST_PTR_FORMAT,
4894 GST_DEBUG_OBJECT (obj->dbg_obj,
4895 "streaming mode: no usable pool, copying to generic pool");
4896 size = MAX (size, obj->info.size);
4899 case GST_V4L2_IO_AUTO:
4901 GST_WARNING_OBJECT (obj->dbg_obj, "unhandled mode");
4908 /* If pushing from our own pool, configure it with queried minimum,
4909 * otherwise use the minimum required */
4910 if (pushing_from_our_pool) {
4911 /* When pushing from our own pool, we need what downstream one, to be able
4912 * to fill the pipeline, the minimum required to decoder according to the
4913 * driver and 2 more, so we don't endup up with everything downstream or
4914 * held by the decoder. We account 2 buffers for v4l2 so when one is being
4915 * pushed downstream the other one can already be queued for the next
4917 own_min = min + obj->min_buffers + 2;
4919 /* If no allocation parameters where provided, allow for a little more
4920 * buffers and enable copy threshold */
4923 gst_v4l2_buffer_pool_copy_at_threshold (GST_V4L2_BUFFER_POOL (pool),
4926 gst_v4l2_buffer_pool_copy_at_threshold (GST_V4L2_BUFFER_POOL (pool),
4931 /* In this case we'll have to configure two buffer pool. For our buffer
4932 * pool, we'll need what the driver one, and one more, so we can dequeu */
4933 own_min = obj->min_buffers + 1;
4934 own_min = MAX (own_min, GST_V4L2_MIN_BUFFERS (obj));
4936 /* for the downstream pool, we keep what downstream wants, though ensure
4937 * at least a minimum if downstream didn't suggest anything (we are
4938 * expecting the base class to create a default one for the context) */
4939 min = MAX (min, GST_V4L2_MIN_BUFFERS (obj));
4941 /* To import we need the other pool to hold at least own_min */
4942 if (obj->pool == pool)
4946 /* Request a bigger max, if one was suggested but it's too small */
4948 max = MAX (min, max);
4950 /* First step, configure our own pool */
4951 config = gst_buffer_pool_get_config (obj->pool);
4953 if (obj->need_video_meta || has_video_meta) {
4954 GST_DEBUG_OBJECT (obj->dbg_obj, "activate Video Meta");
4955 gst_buffer_pool_config_add_option (config,
4956 GST_BUFFER_POOL_OPTION_VIDEO_META);
4959 gst_buffer_pool_config_set_allocator (config, allocator, ¶ms);
4960 gst_buffer_pool_config_set_params (config, caps, size, own_min, 0);
4962 GST_DEBUG_OBJECT (obj->dbg_obj, "setting own pool config to %"
4963 GST_PTR_FORMAT, config);
4965 /* Our pool often need to adjust the value */
4966 if (!gst_buffer_pool_set_config (obj->pool, config)) {
4967 config = gst_buffer_pool_get_config (obj->pool);
4969 GST_DEBUG_OBJECT (obj->dbg_obj, "own pool config changed to %"
4970 GST_PTR_FORMAT, config);
4972 /* our pool will adjust the maximum buffer, which we are fine with */
4973 if (!gst_buffer_pool_set_config (obj->pool, config))
4977 /* Now configure the other pool if different */
4978 if (obj->pool != pool)
4982 config = gst_buffer_pool_get_config (other_pool);
4983 gst_buffer_pool_config_set_allocator (config, allocator, ¶ms);
4984 gst_buffer_pool_config_set_params (config, caps, size, min, max);
4986 GST_DEBUG_OBJECT (obj->dbg_obj, "setting other pool config to %"
4987 GST_PTR_FORMAT, config);
4989 /* if downstream supports video metadata, add this to the pool config */
4990 if (has_video_meta) {
4991 GST_DEBUG_OBJECT (obj->dbg_obj, "activate Video Meta");
4992 gst_buffer_pool_config_add_option (config,
4993 GST_BUFFER_POOL_OPTION_VIDEO_META);
4996 if (!gst_buffer_pool_set_config (other_pool, config)) {
4997 config = gst_buffer_pool_get_config (other_pool);
4999 if (!gst_buffer_pool_config_validate_params (config, caps, size, min,
5001 gst_structure_free (config);
5005 if (!gst_buffer_pool_set_config (other_pool, config))
5011 /* For simplicity, simply read back the active configuration, so our base
5012 * class get the right information */
5013 config = gst_buffer_pool_get_config (pool);
5014 gst_buffer_pool_config_get_params (config, NULL, &size, &min, &max);
5015 gst_structure_free (config);
5019 gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
5021 gst_query_add_allocation_pool (query, pool, size, min, max);
5024 gst_object_unref (allocator);
5027 gst_object_unref (pool);
5033 /* setup_pool already send the error */
5038 GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
5039 (_("Failed to configure internal buffer pool.")), (NULL));
5044 GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
5045 (_("Video device did not suggest any buffer size.")), (NULL));
5051 gst_object_unref (allocator);
5054 gst_object_unref (pool);
5059 GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
5060 (_("No downstream pool to import from.")),
5061 ("When importing DMABUF or USERPTR, we need a pool to import from"));
5067 gst_v4l2_object_propose_allocation (GstV4l2Object * obj, GstQuery * query)
5069 GstBufferPool *pool = NULL;
5070 /* we need at least 2 buffers to operate */
5071 guint size, min, max;
5075 /* Set defaults allocation parameters */
5076 size = obj->info.size;
5077 min = GST_V4L2_MIN_BUFFERS (obj);
5078 max = VIDEO_MAX_FRAME;
5080 gst_query_parse_allocation (query, &caps, &need_pool);
5085 switch (obj->mode) {
5086 case GST_V4L2_IO_MMAP:
5087 case GST_V4L2_IO_DMABUF:
5088 if (need_pool && obj->pool) {
5089 if (!gst_buffer_pool_is_active (obj->pool))
5090 pool = gst_object_ref (obj->pool);
5099 GstStructure *config;
5101 /* we had a pool, check caps */
5102 config = gst_buffer_pool_get_config (pool);
5103 gst_buffer_pool_config_get_params (config, &pcaps, NULL, NULL, NULL);
5105 GST_DEBUG_OBJECT (obj->dbg_obj,
5106 "we had a pool with caps %" GST_PTR_FORMAT, pcaps);
5107 if (!gst_caps_is_equal (caps, pcaps)) {
5108 gst_structure_free (config);
5109 gst_object_unref (pool);
5110 goto different_caps;
5112 gst_structure_free (config);
5114 gst_v4l2_get_driver_min_buffers (obj);
5116 min = MAX (obj->min_buffers, GST_V4L2_MIN_BUFFERS (obj));
5118 gst_query_add_allocation_pool (query, pool, size, min, max);
5120 /* we also support various metadata */
5121 gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
5124 gst_object_unref (pool);
5131 GST_DEBUG_OBJECT (obj->dbg_obj, "no caps specified");
5136 /* different caps, we can't use this pool */
5137 GST_DEBUG_OBJECT (obj->dbg_obj, "pool has different caps");
5143 gst_v4l2_object_try_import (GstV4l2Object * obj, GstBuffer * buffer)
5145 GstVideoMeta *vmeta;
5146 guint n_mem = gst_buffer_n_memory (buffer);
5148 /* only import if requested */
5149 switch (obj->mode) {
5150 case GST_V4L2_IO_USERPTR:
5151 case GST_V4L2_IO_DMABUF_IMPORT:
5154 GST_DEBUG_OBJECT (obj->dbg_obj,
5155 "The io-mode does not enable importation");
5159 vmeta = gst_buffer_get_video_meta (buffer);
5160 if (!vmeta && obj->need_video_meta) {
5161 GST_DEBUG_OBJECT (obj->dbg_obj, "Downstream buffer uses standard "
5162 "stride/offset while the driver does not.");
5166 /* we need matching strides/offsets and size */
5168 guint plane_height[GST_VIDEO_MAX_PLANES] = { 0, };
5170 gst_video_meta_get_plane_height (vmeta, plane_height);
5172 if (!gst_v4l2_object_match_buffer_layout (obj, vmeta->n_planes,
5173 vmeta->offset, vmeta->stride, gst_buffer_get_size (buffer),
5178 /* we can always import single memory buffer, but otherwise we need the same
5179 * amount of memory object. */
5180 if (n_mem != 1 && n_mem != obj->n_v4l2_planes) {
5181 GST_DEBUG_OBJECT (obj->dbg_obj, "Can only import %i memory, "
5182 "buffers contains %u memory", obj->n_v4l2_planes, n_mem);
5186 /* For DMABuf importation we need DMABuf of course */
5187 if (obj->mode == GST_V4L2_IO_DMABUF_IMPORT) {
5190 for (i = 0; i < n_mem; i++) {
5191 GstMemory *mem = gst_buffer_peek_memory (buffer, i);
5193 if (!gst_is_dmabuf_memory (mem)) {
5194 GST_DEBUG_OBJECT (obj->dbg_obj, "Cannot import non-DMABuf memory.");
5200 /* for the remaining, only the kernel driver can tell */