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>
46 GST_DEBUG_CATEGORY_EXTERN (v4l2_debug);
47 #define GST_CAT_DEFAULT v4l2_debug
49 #define DEFAULT_PROP_DEVICE_NAME NULL
50 #define DEFAULT_PROP_DEVICE_FD -1
51 #define DEFAULT_PROP_FLAGS 0
52 #define DEFAULT_PROP_TV_NORM 0
53 #define DEFAULT_PROP_IO_MODE GST_V4L2_IO_AUTO
55 #define ENCODED_BUFFER_SIZE (2 * 1024 * 1024)
60 V4L2_STD_OBJECT_PROPS,
64 * common format / caps utilities:
68 GST_V4L2_RAW = 1 << 0,
69 GST_V4L2_CODEC = 1 << 1,
70 GST_V4L2_TRANSPORT = 1 << 2,
71 GST_V4L2_NO_PARSE = 1 << 3,
79 GstV4L2FormatFlags flags;
82 static const GstV4L2FormatDesc gst_v4l2_formats[] = {
84 {V4L2_PIX_FMT_RGB332, TRUE, GST_V4L2_RAW},
85 {V4L2_PIX_FMT_ARGB555, TRUE, GST_V4L2_RAW},
86 {V4L2_PIX_FMT_XRGB555, TRUE, GST_V4L2_RAW},
87 {V4L2_PIX_FMT_ARGB555X, TRUE, GST_V4L2_RAW},
88 {V4L2_PIX_FMT_XRGB555X, TRUE, GST_V4L2_RAW},
89 {V4L2_PIX_FMT_RGB565, TRUE, GST_V4L2_RAW},
90 {V4L2_PIX_FMT_RGB565X, TRUE, GST_V4L2_RAW},
91 {V4L2_PIX_FMT_BGR666, TRUE, GST_V4L2_RAW},
92 {V4L2_PIX_FMT_BGR24, TRUE, GST_V4L2_RAW},
93 {V4L2_PIX_FMT_RGB24, TRUE, GST_V4L2_RAW},
94 {V4L2_PIX_FMT_ABGR32, TRUE, GST_V4L2_RAW},
95 {V4L2_PIX_FMT_XBGR32, TRUE, GST_V4L2_RAW},
96 {V4L2_PIX_FMT_ARGB32, TRUE, GST_V4L2_RAW},
97 {V4L2_PIX_FMT_XRGB32, TRUE, GST_V4L2_RAW},
99 /* Deprecated Packed RGB Image Formats (alpha ambiguity) */
100 {V4L2_PIX_FMT_RGB444, TRUE, GST_V4L2_RAW},
101 {V4L2_PIX_FMT_RGB555, TRUE, GST_V4L2_RAW},
102 {V4L2_PIX_FMT_RGB555X, TRUE, GST_V4L2_RAW},
103 {V4L2_PIX_FMT_BGR32, TRUE, GST_V4L2_RAW},
104 {V4L2_PIX_FMT_RGB32, TRUE, GST_V4L2_RAW},
107 {V4L2_PIX_FMT_GREY, TRUE, GST_V4L2_RAW},
108 {V4L2_PIX_FMT_Y4, TRUE, GST_V4L2_RAW},
109 {V4L2_PIX_FMT_Y6, TRUE, GST_V4L2_RAW},
110 {V4L2_PIX_FMT_Y10, TRUE, GST_V4L2_RAW},
111 {V4L2_PIX_FMT_Y12, TRUE, GST_V4L2_RAW},
112 {V4L2_PIX_FMT_Y16, TRUE, GST_V4L2_RAW},
113 {V4L2_PIX_FMT_Y16_BE, TRUE, GST_V4L2_RAW},
114 {V4L2_PIX_FMT_Y10BPACK, TRUE, GST_V4L2_RAW},
116 /* Palette formats */
117 {V4L2_PIX_FMT_PAL8, TRUE, GST_V4L2_RAW},
119 /* Chrominance formats */
120 {V4L2_PIX_FMT_UV8, TRUE, GST_V4L2_RAW},
122 /* Luminance+Chrominance formats */
123 {V4L2_PIX_FMT_YVU410, TRUE, GST_V4L2_RAW},
124 {V4L2_PIX_FMT_YVU420, TRUE, GST_V4L2_RAW},
125 {V4L2_PIX_FMT_YVU420M, TRUE, GST_V4L2_RAW},
126 {V4L2_PIX_FMT_YUYV, TRUE, GST_V4L2_RAW},
127 {V4L2_PIX_FMT_YYUV, TRUE, GST_V4L2_RAW},
128 {V4L2_PIX_FMT_YVYU, TRUE, GST_V4L2_RAW},
129 {V4L2_PIX_FMT_UYVY, TRUE, GST_V4L2_RAW},
130 {V4L2_PIX_FMT_VYUY, TRUE, GST_V4L2_RAW},
131 {V4L2_PIX_FMT_YUV422P, TRUE, GST_V4L2_RAW},
132 {V4L2_PIX_FMT_YUV411P, TRUE, GST_V4L2_RAW},
133 {V4L2_PIX_FMT_Y41P, TRUE, GST_V4L2_RAW},
134 {V4L2_PIX_FMT_YUV444, TRUE, GST_V4L2_RAW},
135 {V4L2_PIX_FMT_YUV555, TRUE, GST_V4L2_RAW},
136 {V4L2_PIX_FMT_YUV565, TRUE, GST_V4L2_RAW},
137 {V4L2_PIX_FMT_YUV32, TRUE, GST_V4L2_RAW},
138 {V4L2_PIX_FMT_YUV410, TRUE, GST_V4L2_RAW},
139 {V4L2_PIX_FMT_YUV420, TRUE, GST_V4L2_RAW},
140 {V4L2_PIX_FMT_YUV420M, TRUE, GST_V4L2_RAW},
141 {V4L2_PIX_FMT_HI240, TRUE, GST_V4L2_RAW},
142 {V4L2_PIX_FMT_HM12, TRUE, GST_V4L2_RAW},
143 {V4L2_PIX_FMT_M420, TRUE, GST_V4L2_RAW},
145 /* two planes -- one Y, one Cr + Cb interleaved */
146 {V4L2_PIX_FMT_NV12, TRUE, GST_V4L2_RAW},
147 {V4L2_PIX_FMT_NV12M, TRUE, GST_V4L2_RAW},
148 {V4L2_PIX_FMT_NV12MT, TRUE, GST_V4L2_RAW},
149 {V4L2_PIX_FMT_NV12MT_16X16, TRUE, GST_V4L2_RAW},
150 {V4L2_PIX_FMT_NV21, TRUE, GST_V4L2_RAW},
151 {V4L2_PIX_FMT_NV21M, TRUE, GST_V4L2_RAW},
152 {V4L2_PIX_FMT_NV16, TRUE, GST_V4L2_RAW},
153 {V4L2_PIX_FMT_NV16M, TRUE, GST_V4L2_RAW},
154 {V4L2_PIX_FMT_NV61, TRUE, GST_V4L2_RAW},
155 {V4L2_PIX_FMT_NV61M, TRUE, GST_V4L2_RAW},
156 {V4L2_PIX_FMT_NV24, TRUE, GST_V4L2_RAW},
157 {V4L2_PIX_FMT_NV42, TRUE, GST_V4L2_RAW},
159 /* Bayer formats - see http://www.siliconimaging.com/RGB%20Bayer.htm */
160 {V4L2_PIX_FMT_SBGGR8, TRUE, GST_V4L2_CODEC},
161 {V4L2_PIX_FMT_SGBRG8, TRUE, GST_V4L2_CODEC},
162 {V4L2_PIX_FMT_SGRBG8, TRUE, GST_V4L2_CODEC},
163 {V4L2_PIX_FMT_SRGGB8, TRUE, GST_V4L2_CODEC},
165 /* compressed formats */
166 {V4L2_PIX_FMT_MJPEG, FALSE, GST_V4L2_CODEC},
167 {V4L2_PIX_FMT_JPEG, FALSE, GST_V4L2_CODEC},
168 {V4L2_PIX_FMT_PJPG, FALSE, GST_V4L2_CODEC},
169 {V4L2_PIX_FMT_DV, FALSE, GST_V4L2_TRANSPORT},
170 {V4L2_PIX_FMT_MPEG, FALSE, GST_V4L2_TRANSPORT},
171 {V4L2_PIX_FMT_H264, FALSE, GST_V4L2_CODEC},
172 {V4L2_PIX_FMT_H264_NO_SC, FALSE, GST_V4L2_CODEC},
173 {V4L2_PIX_FMT_H264_MVC, FALSE, GST_V4L2_CODEC},
174 {V4L2_PIX_FMT_H263, FALSE, GST_V4L2_CODEC},
175 {V4L2_PIX_FMT_MPEG1, FALSE, GST_V4L2_CODEC},
176 {V4L2_PIX_FMT_MPEG2, FALSE, GST_V4L2_CODEC},
177 {V4L2_PIX_FMT_MPEG4, FALSE, GST_V4L2_CODEC},
178 {V4L2_PIX_FMT_XVID, FALSE, GST_V4L2_CODEC},
179 {V4L2_PIX_FMT_VC1_ANNEX_G, FALSE, GST_V4L2_CODEC},
180 {V4L2_PIX_FMT_VC1_ANNEX_L, FALSE, GST_V4L2_CODEC},
181 {V4L2_PIX_FMT_VP8, FALSE, GST_V4L2_CODEC | GST_V4L2_NO_PARSE},
182 {V4L2_PIX_FMT_VP9, FALSE, GST_V4L2_CODEC | GST_V4L2_NO_PARSE},
184 /* Vendor-specific formats */
185 {V4L2_PIX_FMT_WNVA, TRUE, GST_V4L2_CODEC},
186 {V4L2_PIX_FMT_SN9C10X, TRUE, GST_V4L2_CODEC},
187 {V4L2_PIX_FMT_PWC1, TRUE, GST_V4L2_CODEC},
188 {V4L2_PIX_FMT_PWC2, TRUE, GST_V4L2_CODEC},
191 #define GST_V4L2_FORMAT_COUNT (G_N_ELEMENTS (gst_v4l2_formats))
193 static GSList *gst_v4l2_object_get_format_list (GstV4l2Object * v4l2object);
196 #define GST_TYPE_V4L2_DEVICE_FLAGS (gst_v4l2_device_get_type ())
198 gst_v4l2_device_get_type (void)
200 static GType v4l2_device_type = 0;
202 if (v4l2_device_type == 0) {
203 static const GFlagsValue values[] = {
204 {V4L2_CAP_VIDEO_CAPTURE, "Device supports video capture", "capture"},
205 {V4L2_CAP_VIDEO_OUTPUT, "Device supports video playback", "output"},
206 {V4L2_CAP_VIDEO_OVERLAY, "Device supports video overlay", "overlay"},
208 {V4L2_CAP_VBI_CAPTURE, "Device supports the VBI capture", "vbi-capture"},
209 {V4L2_CAP_VBI_OUTPUT, "Device supports the VBI output", "vbi-output"},
211 {V4L2_CAP_TUNER, "Device has a tuner or modulator", "tuner"},
212 {V4L2_CAP_AUDIO, "Device has audio inputs or outputs", "audio"},
218 g_flags_register_static ("GstV4l2DeviceTypeFlags", values);
221 return v4l2_device_type;
224 #define GST_TYPE_V4L2_TV_NORM (gst_v4l2_tv_norm_get_type ())
226 gst_v4l2_tv_norm_get_type (void)
228 static GType v4l2_tv_norm = 0;
231 static const GEnumValue tv_norms[] = {
234 {V4L2_STD_NTSC, "NTSC", "NTSC"},
235 {V4L2_STD_NTSC_M, "NTSC-M", "NTSC-M"},
236 {V4L2_STD_NTSC_M_JP, "NTSC-M-JP", "NTSC-M-JP"},
237 {V4L2_STD_NTSC_M_KR, "NTSC-M-KR", "NTSC-M-KR"},
238 {V4L2_STD_NTSC_443, "NTSC-443", "NTSC-443"},
240 {V4L2_STD_PAL, "PAL", "PAL"},
241 {V4L2_STD_PAL_BG, "PAL-BG", "PAL-BG"},
242 {V4L2_STD_PAL_B, "PAL-B", "PAL-B"},
243 {V4L2_STD_PAL_B1, "PAL-B1", "PAL-B1"},
244 {V4L2_STD_PAL_G, "PAL-G", "PAL-G"},
245 {V4L2_STD_PAL_H, "PAL-H", "PAL-H"},
246 {V4L2_STD_PAL_I, "PAL-I", "PAL-I"},
247 {V4L2_STD_PAL_DK, "PAL-DK", "PAL-DK"},
248 {V4L2_STD_PAL_D, "PAL-D", "PAL-D"},
249 {V4L2_STD_PAL_D1, "PAL-D1", "PAL-D1"},
250 {V4L2_STD_PAL_K, "PAL-K", "PAL-K"},
251 {V4L2_STD_PAL_M, "PAL-M", "PAL-M"},
252 {V4L2_STD_PAL_N, "PAL-N", "PAL-N"},
253 {V4L2_STD_PAL_Nc, "PAL-Nc", "PAL-Nc"},
254 {V4L2_STD_PAL_60, "PAL-60", "PAL-60"},
256 {V4L2_STD_SECAM, "SECAM", "SECAM"},
257 {V4L2_STD_SECAM_B, "SECAM-B", "SECAM-B"},
258 {V4L2_STD_SECAM_G, "SECAM-G", "SECAM-G"},
259 {V4L2_STD_SECAM_H, "SECAM-H", "SECAM-H"},
260 {V4L2_STD_SECAM_DK, "SECAM-DK", "SECAM-DK"},
261 {V4L2_STD_SECAM_D, "SECAM-D", "SECAM-D"},
262 {V4L2_STD_SECAM_K, "SECAM-K", "SECAM-K"},
263 {V4L2_STD_SECAM_K1, "SECAM-K1", "SECAM-K1"},
264 {V4L2_STD_SECAM_L, "SECAM-L", "SECAM-L"},
265 {V4L2_STD_SECAM_LC, "SECAM-Lc", "SECAM-Lc"},
270 v4l2_tv_norm = g_enum_register_static ("V4L2_TV_norms", tv_norms);
277 gst_v4l2_io_mode_get_type (void)
279 static GType v4l2_io_mode = 0;
282 static const GEnumValue io_modes[] = {
283 {GST_V4L2_IO_AUTO, "GST_V4L2_IO_AUTO", "auto"},
284 {GST_V4L2_IO_RW, "GST_V4L2_IO_RW", "rw"},
285 {GST_V4L2_IO_MMAP, "GST_V4L2_IO_MMAP", "mmap"},
286 {GST_V4L2_IO_USERPTR, "GST_V4L2_IO_USERPTR", "userptr"},
287 {GST_V4L2_IO_DMABUF, "GST_V4L2_IO_DMABUF", "dmabuf"},
288 {GST_V4L2_IO_DMABUF_IMPORT, "GST_V4L2_IO_DMABUF_IMPORT",
293 v4l2_io_mode = g_enum_register_static ("GstV4l2IOMode", io_modes);
299 gst_v4l2_object_install_properties_helper (GObjectClass * gobject_class,
300 const char *default_device)
302 g_object_class_install_property (gobject_class, PROP_DEVICE,
303 g_param_spec_string ("device", "Device", "Device location",
304 default_device, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
305 g_object_class_install_property (gobject_class, PROP_DEVICE_NAME,
306 g_param_spec_string ("device-name", "Device name",
307 "Name of the device", DEFAULT_PROP_DEVICE_NAME,
308 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
309 g_object_class_install_property (gobject_class, PROP_DEVICE_FD,
310 g_param_spec_int ("device-fd", "File descriptor",
311 "File descriptor of the device", -1, G_MAXINT, DEFAULT_PROP_DEVICE_FD,
312 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
313 g_object_class_install_property (gobject_class, PROP_FLAGS,
314 g_param_spec_flags ("flags", "Flags", "Device type flags",
315 GST_TYPE_V4L2_DEVICE_FLAGS, DEFAULT_PROP_FLAGS,
316 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
319 * GstV4l2Src:brightness:
321 * Picture brightness, or more precisely, the black level
323 g_object_class_install_property (gobject_class, PROP_BRIGHTNESS,
324 g_param_spec_int ("brightness", "Brightness",
325 "Picture brightness, or more precisely, the black level", G_MININT,
327 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
329 * GstV4l2Src:contrast:
331 * Picture contrast or luma gain
333 g_object_class_install_property (gobject_class, PROP_CONTRAST,
334 g_param_spec_int ("contrast", "Contrast",
335 "Picture contrast or luma gain", G_MININT,
337 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
339 * GstV4l2Src:saturation:
341 * Picture color saturation or chroma gain
343 g_object_class_install_property (gobject_class, PROP_SATURATION,
344 g_param_spec_int ("saturation", "Saturation",
345 "Picture color saturation or chroma gain", G_MININT,
347 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
351 * Hue or color balance
353 g_object_class_install_property (gobject_class, PROP_HUE,
354 g_param_spec_int ("hue", "Hue",
355 "Hue or color balance", G_MININT,
357 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
364 g_object_class_install_property (gobject_class, PROP_TV_NORM,
365 g_param_spec_enum ("norm", "TV norm",
367 GST_TYPE_V4L2_TV_NORM, DEFAULT_PROP_TV_NORM,
368 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
371 * GstV4l2Src:io-mode:
375 g_object_class_install_property (gobject_class, PROP_IO_MODE,
376 g_param_spec_enum ("io-mode", "IO mode",
378 GST_TYPE_V4L2_IO_MODE, DEFAULT_PROP_IO_MODE,
379 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
382 * GstV4l2Src:extra-controls:
384 * Additional v4l2 controls for the device. The controls are identified
385 * by the control name (lowercase with '_' for any non-alphanumeric
390 g_object_class_install_property (gobject_class, PROP_EXTRA_CONTROLS,
391 g_param_spec_boxed ("extra-controls", "Extra Controls",
392 "Extra v4l2 controls (CIDs) for the device",
393 GST_TYPE_STRUCTURE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
396 * GstV4l2Src:pixel-aspect-ratio:
398 * The pixel aspect ratio of the device. This overwrites the pixel aspect
399 * ratio queried from the device.
403 g_object_class_install_property (gobject_class, PROP_PIXEL_ASPECT_RATIO,
404 g_param_spec_string ("pixel-aspect-ratio", "Pixel Aspect Ratio",
405 "Overwrite the pixel aspect ratio of the device", "1/1",
406 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
409 * GstV4l2Src:force-aspect-ratio:
411 * When enabled, the pixel aspect ratio queried from the device or set
412 * with the pixel-aspect-ratio property will be enforced.
416 g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO,
417 g_param_spec_boolean ("force-aspect-ratio", "Force aspect ratio",
418 "When enabled, the pixel aspect ratio will be enforced", TRUE,
419 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
424 gst_v4l2_object_install_m2m_properties_helper (GObjectClass * gobject_class)
426 g_object_class_install_property (gobject_class, PROP_DEVICE,
427 g_param_spec_string ("device", "Device", "Device location",
428 NULL, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
430 g_object_class_install_property (gobject_class, PROP_DEVICE_NAME,
431 g_param_spec_string ("device-name", "Device name",
432 "Name of the device", DEFAULT_PROP_DEVICE_NAME,
433 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
435 g_object_class_install_property (gobject_class, PROP_DEVICE_FD,
436 g_param_spec_int ("device-fd", "File descriptor",
437 "File descriptor of the device", -1, G_MAXINT, DEFAULT_PROP_DEVICE_FD,
438 G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
440 g_object_class_install_property (gobject_class, PROP_OUTPUT_IO_MODE,
441 g_param_spec_enum ("output-io-mode", "Output IO mode",
442 "Output side I/O mode (matches sink pad)",
443 GST_TYPE_V4L2_IO_MODE, DEFAULT_PROP_IO_MODE,
444 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
446 g_object_class_install_property (gobject_class, PROP_CAPTURE_IO_MODE,
447 g_param_spec_enum ("capture-io-mode", "Capture IO mode",
448 "Capture I/O mode (matches src pad)",
449 GST_TYPE_V4L2_IO_MODE, DEFAULT_PROP_IO_MODE,
450 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
452 g_object_class_install_property (gobject_class, PROP_EXTRA_CONTROLS,
453 g_param_spec_boxed ("extra-controls", "Extra Controls",
454 "Extra v4l2 controls (CIDs) for the device",
455 GST_TYPE_STRUCTURE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
458 /* Support for 32bit off_t, this wrapper is casting off_t to gint64 */
463 v4l2_mmap_wrapper (gpointer start, gsize length, gint prot, gint flags, gint fd,
466 return v4l2_mmap (start, length, prot, flags, fd, (gint64) offset);
469 #define v4l2_mmap v4l2_mmap_wrapper
471 #endif /* SIZEOF_OFF_T < 8 */
472 #endif /* HAVE_LIBV4L2 */
475 gst_v4l2_object_new (GstElement * element,
476 GstObject * debug_object,
477 enum v4l2_buf_type type,
478 const char *default_device,
479 GstV4l2GetInOutFunction get_in_out_func,
480 GstV4l2SetInOutFunction set_in_out_func,
481 GstV4l2UpdateFpsFunction update_fps_func)
483 GstV4l2Object *v4l2object;
486 * some default values
488 v4l2object = g_new0 (GstV4l2Object, 1);
490 v4l2object->type = type;
491 v4l2object->formats = NULL;
493 v4l2object->element = element;
494 v4l2object->dbg_obj = debug_object;
495 v4l2object->get_in_out_func = get_in_out_func;
496 v4l2object->set_in_out_func = set_in_out_func;
497 v4l2object->update_fps_func = update_fps_func;
499 v4l2object->video_fd = -1;
500 v4l2object->active = FALSE;
501 v4l2object->videodev = g_strdup (default_device);
503 v4l2object->norms = NULL;
504 v4l2object->channels = NULL;
505 v4l2object->colors = NULL;
507 v4l2object->keep_aspect = TRUE;
509 v4l2object->n_v4l2_planes = 0;
511 v4l2object->no_initial_format = FALSE;
513 /* We now disable libv4l2 by default, but have an env to enable it. */
515 if (g_getenv ("GST_V4L2_USE_LIBV4L2")) {
516 v4l2object->fd_open = v4l2_fd_open;
517 v4l2object->close = v4l2_close;
518 v4l2object->dup = v4l2_dup;
519 v4l2object->ioctl = v4l2_ioctl;
520 v4l2object->read = v4l2_read;
521 v4l2object->mmap = v4l2_mmap;
522 v4l2object->munmap = v4l2_munmap;
526 v4l2object->fd_open = NULL;
527 v4l2object->close = close;
528 v4l2object->dup = dup;
529 v4l2object->ioctl = ioctl;
530 v4l2object->read = read;
531 v4l2object->mmap = mmap;
532 v4l2object->munmap = munmap;
538 static gboolean gst_v4l2_object_clear_format_list (GstV4l2Object * v4l2object);
542 gst_v4l2_object_destroy (GstV4l2Object * v4l2object)
544 g_return_if_fail (v4l2object != NULL);
546 g_free (v4l2object->videodev);
548 g_free (v4l2object->channel);
550 if (v4l2object->formats) {
551 gst_v4l2_object_clear_format_list (v4l2object);
554 if (v4l2object->probed_caps) {
555 gst_caps_unref (v4l2object->probed_caps);
558 if (v4l2object->extra_controls) {
559 gst_structure_free (v4l2object->extra_controls);
567 gst_v4l2_object_clear_format_list (GstV4l2Object * v4l2object)
569 g_slist_foreach (v4l2object->formats, (GFunc) g_free, NULL);
570 g_slist_free (v4l2object->formats);
571 v4l2object->formats = NULL;
577 gst_v4l2_object_prop_to_cid (guint prop_id)
582 case PROP_BRIGHTNESS:
583 cid = V4L2_CID_BRIGHTNESS;
586 cid = V4L2_CID_CONTRAST;
588 case PROP_SATURATION:
589 cid = V4L2_CID_SATURATION;
595 GST_WARNING ("unmapped property id: %d", prop_id);
602 gst_v4l2_object_set_property_helper (GstV4l2Object * v4l2object,
603 guint prop_id, const GValue * value, GParamSpec * pspec)
607 g_free (v4l2object->videodev);
608 v4l2object->videodev = g_value_dup_string (value);
610 case PROP_BRIGHTNESS:
612 case PROP_SATURATION:
615 gint cid = gst_v4l2_object_prop_to_cid (prop_id);
618 if (GST_V4L2_IS_OPEN (v4l2object)) {
619 gst_v4l2_set_attribute (v4l2object, cid, g_value_get_int (value));
626 v4l2object->tv_norm = g_value_get_enum (value);
630 if (GST_V4L2_IS_OPEN (v4l2object)) {
631 GstTuner *tuner = GST_TUNER (v4l2object->element);
632 GstTunerChannel *channel = gst_tuner_find_channel_by_name (tuner,
633 (gchar *) g_value_get_string (value));
636 /* like gst_tuner_set_channel (tuner, channel)
637 without g_object_notify */
638 gst_v4l2_tuner_set_channel (v4l2object, channel);
641 g_free (v4l2object->channel);
642 v4l2object->channel = g_value_dup_string (value);
646 if (GST_V4L2_IS_OPEN (v4l2object)) {
647 GstTuner *tuner = GST_TUNER (v4l2object->element);
648 GstTunerChannel *channel = gst_tuner_get_channel (tuner);
651 GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
653 gst_tuner_set_frequency (tuner, channel, g_value_get_ulong (value))
654 without g_object_notify */
655 gst_v4l2_tuner_set_frequency (v4l2object, channel,
656 g_value_get_ulong (value));
659 v4l2object->frequency = g_value_get_ulong (value);
665 v4l2object->req_mode = g_value_get_enum (value);
667 case PROP_CAPTURE_IO_MODE:
668 g_return_val_if_fail (!V4L2_TYPE_IS_OUTPUT (v4l2object->type), FALSE);
669 v4l2object->req_mode = g_value_get_enum (value);
671 case PROP_OUTPUT_IO_MODE:
672 g_return_val_if_fail (V4L2_TYPE_IS_OUTPUT (v4l2object->type), FALSE);
673 v4l2object->req_mode = g_value_get_enum (value);
675 case PROP_EXTRA_CONTROLS:{
676 const GstStructure *s = gst_value_get_structure (value);
678 if (v4l2object->extra_controls)
679 gst_structure_free (v4l2object->extra_controls);
681 v4l2object->extra_controls = s ? gst_structure_copy (s) : NULL;
682 if (GST_V4L2_IS_OPEN (v4l2object))
683 gst_v4l2_set_controls (v4l2object, v4l2object->extra_controls);
686 case PROP_PIXEL_ASPECT_RATIO:
687 if (v4l2object->par) {
688 g_value_unset (v4l2object->par);
689 g_free (v4l2object->par);
691 v4l2object->par = g_new0 (GValue, 1);
692 g_value_init (v4l2object->par, GST_TYPE_FRACTION);
693 if (!g_value_transform (value, v4l2object->par)) {
694 g_warning ("Could not transform string to aspect ratio");
695 gst_value_set_fraction (v4l2object->par, 1, 1);
698 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "set PAR to %d/%d",
699 gst_value_get_fraction_numerator (v4l2object->par),
700 gst_value_get_fraction_denominator (v4l2object->par));
702 case PROP_FORCE_ASPECT_RATIO:
703 v4l2object->keep_aspect = g_value_get_boolean (value);
714 gst_v4l2_object_get_property_helper (GstV4l2Object * v4l2object,
715 guint prop_id, GValue * value, GParamSpec * pspec)
719 g_value_set_string (value, v4l2object->videodev);
721 case PROP_DEVICE_NAME:
723 const guchar *name = NULL;
725 if (GST_V4L2_IS_OPEN (v4l2object))
726 name = v4l2object->vcap.card;
728 g_value_set_string (value, (gchar *) name);
733 if (GST_V4L2_IS_OPEN (v4l2object))
734 g_value_set_int (value, v4l2object->video_fd);
736 g_value_set_int (value, DEFAULT_PROP_DEVICE_FD);
743 if (GST_V4L2_IS_OPEN (v4l2object)) {
744 flags |= v4l2object->device_caps &
745 (V4L2_CAP_VIDEO_CAPTURE |
746 V4L2_CAP_VIDEO_OUTPUT |
747 V4L2_CAP_VIDEO_OVERLAY |
748 V4L2_CAP_VBI_CAPTURE |
749 V4L2_CAP_VBI_OUTPUT | V4L2_CAP_TUNER | V4L2_CAP_AUDIO);
751 if (v4l2object->device_caps & V4L2_CAP_VIDEO_CAPTURE_MPLANE)
752 flags |= V4L2_CAP_VIDEO_CAPTURE;
754 if (v4l2object->device_caps & V4L2_CAP_VIDEO_OUTPUT_MPLANE)
755 flags |= V4L2_CAP_VIDEO_OUTPUT;
757 g_value_set_flags (value, flags);
760 case PROP_BRIGHTNESS:
762 case PROP_SATURATION:
765 gint cid = gst_v4l2_object_prop_to_cid (prop_id);
768 if (GST_V4L2_IS_OPEN (v4l2object)) {
770 if (gst_v4l2_get_attribute (v4l2object, cid, &v)) {
771 g_value_set_int (value, v);
779 g_value_set_enum (value, v4l2object->tv_norm);
782 g_value_set_enum (value, v4l2object->req_mode);
784 case PROP_CAPTURE_IO_MODE:
785 g_return_val_if_fail (!V4L2_TYPE_IS_OUTPUT (v4l2object->type), FALSE);
786 g_value_set_enum (value, v4l2object->req_mode);
788 case PROP_OUTPUT_IO_MODE:
789 g_return_val_if_fail (V4L2_TYPE_IS_OUTPUT (v4l2object->type), FALSE);
790 g_value_set_enum (value, v4l2object->req_mode);
792 case PROP_EXTRA_CONTROLS:
793 gst_value_set_structure (value, v4l2object->extra_controls);
795 case PROP_PIXEL_ASPECT_RATIO:
797 g_value_transform (v4l2object->par, value);
799 case PROP_FORCE_ASPECT_RATIO:
800 g_value_set_boolean (value, v4l2object->keep_aspect);
810 gst_v4l2_get_driver_min_buffers (GstV4l2Object * v4l2object)
812 struct v4l2_control control = { 0, };
814 g_return_if_fail (GST_V4L2_IS_OPEN (v4l2object));
816 if (V4L2_TYPE_IS_OUTPUT (v4l2object->type))
817 control.id = V4L2_CID_MIN_BUFFERS_FOR_OUTPUT;
819 control.id = V4L2_CID_MIN_BUFFERS_FOR_CAPTURE;
821 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) == 0) {
822 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
823 "driver requires a minimum of %d buffers", control.value);
824 v4l2object->min_buffers = control.value;
826 v4l2object->min_buffers = 0;
831 gst_v4l2_set_defaults (GstV4l2Object * v4l2object)
833 GstTunerNorm *norm = NULL;
834 GstTunerChannel *channel = NULL;
837 if (!GST_IS_TUNER (v4l2object->element))
840 tuner = GST_TUNER (v4l2object->element);
842 if (v4l2object->tv_norm)
843 norm = gst_v4l2_tuner_get_norm_by_std_id (v4l2object, v4l2object->tv_norm);
844 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "tv_norm=0x%" G_GINT64_MODIFIER "x, "
845 "norm=%p", (guint64) v4l2object->tv_norm, norm);
847 gst_tuner_set_norm (tuner, norm);
850 GST_TUNER_NORM (gst_tuner_get_norm (GST_TUNER (v4l2object->element)));
852 v4l2object->tv_norm =
853 gst_v4l2_tuner_get_std_id_by_norm (v4l2object, norm);
854 gst_tuner_norm_changed (tuner, norm);
858 if (v4l2object->channel)
859 channel = gst_tuner_find_channel_by_name (tuner, v4l2object->channel);
861 gst_tuner_set_channel (tuner, channel);
864 GST_TUNER_CHANNEL (gst_tuner_get_channel (GST_TUNER
865 (v4l2object->element)));
867 g_free (v4l2object->channel);
868 v4l2object->channel = g_strdup (channel->label);
869 gst_tuner_channel_changed (tuner, channel);
874 && GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
875 if (v4l2object->frequency != 0) {
876 gst_tuner_set_frequency (tuner, channel, v4l2object->frequency);
878 v4l2object->frequency = gst_tuner_get_frequency (tuner, channel);
879 if (v4l2object->frequency == 0) {
881 gst_tuner_set_frequency (tuner, channel, 1000);
889 gst_v4l2_object_open (GstV4l2Object * v4l2object)
891 if (gst_v4l2_open (v4l2object))
892 gst_v4l2_set_defaults (v4l2object);
900 gst_v4l2_object_open_shared (GstV4l2Object * v4l2object, GstV4l2Object * other)
904 ret = gst_v4l2_dup (v4l2object, other);
910 gst_v4l2_object_close (GstV4l2Object * v4l2object)
912 if (!gst_v4l2_close (v4l2object))
915 gst_caps_replace (&v4l2object->probed_caps, NULL);
917 /* reset our copy of the device caps */
918 v4l2object->device_caps = 0;
920 if (v4l2object->formats) {
921 gst_v4l2_object_clear_format_list (v4l2object);
924 if (v4l2object->par) {
925 g_value_unset (v4l2object->par);
926 g_free (v4l2object->par);
927 v4l2object->par = NULL;
930 if (v4l2object->channel) {
931 g_free (v4l2object->channel);
932 v4l2object->channel = NULL;
938 static struct v4l2_fmtdesc *
939 gst_v4l2_object_get_format_from_fourcc (GstV4l2Object * v4l2object,
942 struct v4l2_fmtdesc *fmt;
948 walk = gst_v4l2_object_get_format_list (v4l2object);
950 fmt = (struct v4l2_fmtdesc *) walk->data;
951 if (fmt->pixelformat == fourcc)
953 /* special case for jpeg */
954 if (fmt->pixelformat == V4L2_PIX_FMT_MJPEG ||
955 fmt->pixelformat == V4L2_PIX_FMT_JPEG ||
956 fmt->pixelformat == V4L2_PIX_FMT_PJPG) {
957 if (fourcc == V4L2_PIX_FMT_JPEG || fourcc == V4L2_PIX_FMT_MJPEG ||
958 fourcc == V4L2_PIX_FMT_PJPG) {
962 walk = g_slist_next (walk);
970 /* complete made up ranking, the values themselves are meaningless */
971 /* These ranks MUST be X such that X<<15 fits on a signed int - see
972 the comment at the end of gst_v4l2_object_format_get_rank. */
973 #define YUV_BASE_RANK 1000
974 #define JPEG_BASE_RANK 500
975 #define DV_BASE_RANK 200
976 #define RGB_BASE_RANK 100
977 #define YUV_ODD_BASE_RANK 50
978 #define RGB_ODD_BASE_RANK 25
979 #define BAYER_BASE_RANK 15
980 #define S910_BASE_RANK 10
981 #define GREY_BASE_RANK 5
982 #define PWC_BASE_RANK 1
985 gst_v4l2_object_format_get_rank (const struct v4l2_fmtdesc *fmt)
987 guint32 fourcc = fmt->pixelformat;
988 gboolean emulated = ((fmt->flags & V4L2_FMT_FLAG_EMULATED) != 0);
992 case V4L2_PIX_FMT_MJPEG:
993 case V4L2_PIX_FMT_PJPG:
994 rank = JPEG_BASE_RANK;
996 case V4L2_PIX_FMT_JPEG:
997 rank = JPEG_BASE_RANK + 1;
999 case V4L2_PIX_FMT_MPEG: /* MPEG */
1000 rank = JPEG_BASE_RANK + 2;
1003 case V4L2_PIX_FMT_RGB332:
1004 case V4L2_PIX_FMT_ARGB555:
1005 case V4L2_PIX_FMT_XRGB555:
1006 case V4L2_PIX_FMT_RGB555:
1007 case V4L2_PIX_FMT_ARGB555X:
1008 case V4L2_PIX_FMT_XRGB555X:
1009 case V4L2_PIX_FMT_RGB555X:
1010 case V4L2_PIX_FMT_BGR666:
1011 case V4L2_PIX_FMT_RGB565:
1012 case V4L2_PIX_FMT_RGB565X:
1013 case V4L2_PIX_FMT_RGB444:
1014 case V4L2_PIX_FMT_Y4:
1015 case V4L2_PIX_FMT_Y6:
1016 case V4L2_PIX_FMT_Y10:
1017 case V4L2_PIX_FMT_Y12:
1018 case V4L2_PIX_FMT_Y10BPACK:
1019 case V4L2_PIX_FMT_YUV555:
1020 case V4L2_PIX_FMT_YUV565:
1021 case V4L2_PIX_FMT_YUV32:
1022 case V4L2_PIX_FMT_NV12MT_16X16:
1023 case V4L2_PIX_FMT_NV42:
1024 case V4L2_PIX_FMT_H264_MVC:
1025 rank = RGB_ODD_BASE_RANK;
1028 case V4L2_PIX_FMT_RGB24:
1029 case V4L2_PIX_FMT_BGR24:
1030 rank = RGB_BASE_RANK - 1;
1033 case V4L2_PIX_FMT_RGB32:
1034 case V4L2_PIX_FMT_BGR32:
1035 case V4L2_PIX_FMT_ABGR32:
1036 case V4L2_PIX_FMT_XBGR32:
1037 case V4L2_PIX_FMT_ARGB32:
1038 case V4L2_PIX_FMT_XRGB32:
1039 rank = RGB_BASE_RANK;
1042 case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
1043 rank = GREY_BASE_RANK;
1046 case V4L2_PIX_FMT_NV12: /* 12 Y/CbCr 4:2:0 */
1047 case V4L2_PIX_FMT_NV12M: /* Same as NV12 */
1048 case V4L2_PIX_FMT_NV12MT: /* NV12 64x32 tile */
1049 case V4L2_PIX_FMT_NV21: /* 12 Y/CrCb 4:2:0 */
1050 case V4L2_PIX_FMT_NV21M: /* Same as NV21 */
1051 case V4L2_PIX_FMT_YYUV: /* 16 YUV 4:2:2 */
1052 case V4L2_PIX_FMT_HI240: /* 8 8-bit color */
1053 case V4L2_PIX_FMT_NV16: /* 16 Y/CbCr 4:2:2 */
1054 case V4L2_PIX_FMT_NV16M: /* Same as NV16 */
1055 case V4L2_PIX_FMT_NV61: /* 16 Y/CrCb 4:2:2 */
1056 case V4L2_PIX_FMT_NV61M: /* Same as NV61 */
1057 case V4L2_PIX_FMT_NV24: /* 24 Y/CrCb 4:4:4 */
1058 rank = YUV_ODD_BASE_RANK;
1061 case V4L2_PIX_FMT_YVU410: /* YVU9, 9 bits per pixel */
1062 rank = YUV_BASE_RANK + 3;
1064 case V4L2_PIX_FMT_YUV410: /* YUV9, 9 bits per pixel */
1065 rank = YUV_BASE_RANK + 2;
1067 case V4L2_PIX_FMT_YUV420: /* I420, 12 bits per pixel */
1068 case V4L2_PIX_FMT_YUV420M:
1069 rank = YUV_BASE_RANK + 7;
1071 case V4L2_PIX_FMT_YUYV: /* YUY2, 16 bits per pixel */
1072 rank = YUV_BASE_RANK + 10;
1074 case V4L2_PIX_FMT_YVU420: /* YV12, 12 bits per pixel */
1075 rank = YUV_BASE_RANK + 6;
1077 case V4L2_PIX_FMT_UYVY: /* UYVY, 16 bits per pixel */
1078 rank = YUV_BASE_RANK + 9;
1080 case V4L2_PIX_FMT_YUV444:
1081 rank = YUV_BASE_RANK + 6;
1083 case V4L2_PIX_FMT_Y41P: /* Y41P, 12 bits per pixel */
1084 rank = YUV_BASE_RANK + 5;
1086 case V4L2_PIX_FMT_YUV411P: /* Y41B, 12 bits per pixel */
1087 rank = YUV_BASE_RANK + 4;
1089 case V4L2_PIX_FMT_YUV422P: /* Y42B, 16 bits per pixel */
1090 rank = YUV_BASE_RANK + 8;
1093 case V4L2_PIX_FMT_DV:
1094 rank = DV_BASE_RANK;
1097 case V4L2_PIX_FMT_WNVA: /* Winnov hw compres */
1101 case V4L2_PIX_FMT_SBGGR8:
1102 case V4L2_PIX_FMT_SGBRG8:
1103 case V4L2_PIX_FMT_SGRBG8:
1104 case V4L2_PIX_FMT_SRGGB8:
1105 rank = BAYER_BASE_RANK;
1108 case V4L2_PIX_FMT_SN9C10X:
1109 rank = S910_BASE_RANK;
1112 case V4L2_PIX_FMT_PWC1:
1113 rank = PWC_BASE_RANK;
1115 case V4L2_PIX_FMT_PWC2:
1116 rank = PWC_BASE_RANK;
1124 /* All ranks are below 1<<15 so a shift by 15
1125 * will a) make all non-emulated formats larger
1126 * than emulated and b) will not overflow
1137 format_cmp_func (gconstpointer a, gconstpointer b)
1139 const struct v4l2_fmtdesc *fa = a;
1140 const struct v4l2_fmtdesc *fb = b;
1142 if (fa->pixelformat == fb->pixelformat)
1145 return gst_v4l2_object_format_get_rank (fb) -
1146 gst_v4l2_object_format_get_rank (fa);
1149 /******************************************************
1150 * gst_v4l2_object_fill_format_list():
1151 * create list of supported capture formats
1152 * return value: TRUE on success, FALSE on error
1153 ******************************************************/
1155 gst_v4l2_object_fill_format_list (GstV4l2Object * v4l2object,
1156 enum v4l2_buf_type type)
1159 struct v4l2_fmtdesc *format;
1161 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "getting src format enumerations");
1163 /* format enumeration */
1165 format = g_new0 (struct v4l2_fmtdesc, 1);
1168 format->type = type;
1170 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_ENUM_FMT, format) < 0) {
1171 if (errno == EINVAL) {
1173 break; /* end of enumeration */
1179 GST_LOG_OBJECT (v4l2object->dbg_obj, "index: %u", format->index);
1180 GST_LOG_OBJECT (v4l2object->dbg_obj, "type: %d", format->type);
1181 GST_LOG_OBJECT (v4l2object->dbg_obj, "flags: %08x", format->flags);
1182 GST_LOG_OBJECT (v4l2object->dbg_obj, "description: '%s'",
1183 format->description);
1184 GST_LOG_OBJECT (v4l2object->dbg_obj, "pixelformat: %" GST_FOURCC_FORMAT,
1185 GST_FOURCC_ARGS (format->pixelformat));
1187 /* sort formats according to our preference; we do this, because caps
1188 * are probed in the order the formats are in the list, and the order of
1189 * formats in the final probed caps matters for things like fixation */
1190 v4l2object->formats = g_slist_insert_sorted (v4l2object->formats, format,
1191 (GCompareFunc) format_cmp_func);
1194 #ifndef GST_DISABLE_GST_DEBUG
1198 GST_INFO_OBJECT (v4l2object->dbg_obj, "got %d format(s):", n);
1199 for (l = v4l2object->formats; l != NULL; l = l->next) {
1202 GST_INFO_OBJECT (v4l2object->dbg_obj,
1203 " %" GST_FOURCC_FORMAT "%s", GST_FOURCC_ARGS (format->pixelformat),
1204 ((format->flags & V4L2_FMT_FLAG_EMULATED)) ? " (emulated)" : "");
1216 if (v4l2object->element)
1219 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
1220 (_("Failed to enumerate possible video formats device '%s' can work "
1221 "with"), v4l2object->videodev),
1222 ("Failed to get number %d in pixelformat enumeration for %s. (%d - %s)",
1223 n, v4l2object->videodev, errno, g_strerror (errno)));
1230 * Get the list of supported capture formats, a list of
1231 * <code>struct v4l2_fmtdesc</code>.
1234 gst_v4l2_object_get_format_list (GstV4l2Object * v4l2object)
1236 if (!v4l2object->formats) {
1238 /* check usual way */
1239 gst_v4l2_object_fill_format_list (v4l2object, v4l2object->type);
1241 /* if our driver supports multi-planar
1242 * and if formats are still empty then we can workaround driver bug
1243 * by also looking up formats as if our device was not supporting
1245 if (!v4l2object->formats) {
1246 switch (v4l2object->type) {
1247 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1248 gst_v4l2_object_fill_format_list (v4l2object,
1249 V4L2_BUF_TYPE_VIDEO_CAPTURE);
1252 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1253 gst_v4l2_object_fill_format_list (v4l2object,
1254 V4L2_BUF_TYPE_VIDEO_OUTPUT);
1262 return v4l2object->formats;
1265 static GstVideoFormat
1266 gst_v4l2_object_v4l2fourcc_to_video_format (guint32 fourcc)
1268 GstVideoFormat format;
1271 case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
1272 format = GST_VIDEO_FORMAT_GRAY8;
1274 case V4L2_PIX_FMT_Y16:
1275 format = GST_VIDEO_FORMAT_GRAY16_LE;
1277 case V4L2_PIX_FMT_Y16_BE:
1278 format = GST_VIDEO_FORMAT_GRAY16_BE;
1280 case V4L2_PIX_FMT_XRGB555:
1281 case V4L2_PIX_FMT_RGB555:
1282 format = GST_VIDEO_FORMAT_RGB15;
1284 case V4L2_PIX_FMT_XRGB555X:
1285 case V4L2_PIX_FMT_RGB555X:
1286 format = GST_VIDEO_FORMAT_BGR15;
1288 case V4L2_PIX_FMT_RGB565:
1289 format = GST_VIDEO_FORMAT_RGB16;
1291 case V4L2_PIX_FMT_RGB24:
1292 format = GST_VIDEO_FORMAT_RGB;
1294 case V4L2_PIX_FMT_BGR24:
1295 format = GST_VIDEO_FORMAT_BGR;
1297 case V4L2_PIX_FMT_XRGB32:
1298 case V4L2_PIX_FMT_RGB32:
1299 format = GST_VIDEO_FORMAT_xRGB;
1301 case V4L2_PIX_FMT_XBGR32:
1302 case V4L2_PIX_FMT_BGR32:
1303 format = GST_VIDEO_FORMAT_BGRx;
1305 case V4L2_PIX_FMT_ABGR32:
1306 format = GST_VIDEO_FORMAT_BGRA;
1308 case V4L2_PIX_FMT_ARGB32:
1309 format = GST_VIDEO_FORMAT_ARGB;
1311 case V4L2_PIX_FMT_NV12:
1312 case V4L2_PIX_FMT_NV12M:
1313 format = GST_VIDEO_FORMAT_NV12;
1315 case V4L2_PIX_FMT_NV12MT:
1316 format = GST_VIDEO_FORMAT_NV12_64Z32;
1318 case V4L2_PIX_FMT_NV21:
1319 case V4L2_PIX_FMT_NV21M:
1320 format = GST_VIDEO_FORMAT_NV21;
1322 case V4L2_PIX_FMT_YVU410:
1323 format = GST_VIDEO_FORMAT_YVU9;
1325 case V4L2_PIX_FMT_YUV410:
1326 format = GST_VIDEO_FORMAT_YUV9;
1328 case V4L2_PIX_FMT_YUV420:
1329 case V4L2_PIX_FMT_YUV420M:
1330 format = GST_VIDEO_FORMAT_I420;
1332 case V4L2_PIX_FMT_YUYV:
1333 format = GST_VIDEO_FORMAT_YUY2;
1335 case V4L2_PIX_FMT_YVU420:
1336 format = GST_VIDEO_FORMAT_YV12;
1338 case V4L2_PIX_FMT_UYVY:
1339 format = GST_VIDEO_FORMAT_UYVY;
1341 case V4L2_PIX_FMT_YUV411P:
1342 format = GST_VIDEO_FORMAT_Y41B;
1344 case V4L2_PIX_FMT_YUV422P:
1345 format = GST_VIDEO_FORMAT_Y42B;
1347 case V4L2_PIX_FMT_YVYU:
1348 format = GST_VIDEO_FORMAT_YVYU;
1350 case V4L2_PIX_FMT_NV16:
1351 case V4L2_PIX_FMT_NV16M:
1352 format = GST_VIDEO_FORMAT_NV16;
1354 case V4L2_PIX_FMT_NV61:
1355 case V4L2_PIX_FMT_NV61M:
1356 format = GST_VIDEO_FORMAT_NV61;
1358 case V4L2_PIX_FMT_NV24:
1359 format = GST_VIDEO_FORMAT_NV24;
1362 format = GST_VIDEO_FORMAT_UNKNOWN;
1370 gst_v4l2_object_v4l2fourcc_is_rgb (guint32 fourcc)
1372 gboolean ret = FALSE;
1375 case V4L2_PIX_FMT_XRGB555:
1376 case V4L2_PIX_FMT_RGB555:
1377 case V4L2_PIX_FMT_XRGB555X:
1378 case V4L2_PIX_FMT_RGB555X:
1379 case V4L2_PIX_FMT_RGB565:
1380 case V4L2_PIX_FMT_RGB24:
1381 case V4L2_PIX_FMT_BGR24:
1382 case V4L2_PIX_FMT_XRGB32:
1383 case V4L2_PIX_FMT_RGB32:
1384 case V4L2_PIX_FMT_XBGR32:
1385 case V4L2_PIX_FMT_BGR32:
1386 case V4L2_PIX_FMT_ABGR32:
1387 case V4L2_PIX_FMT_ARGB32:
1397 static GstStructure *
1398 gst_v4l2_object_v4l2fourcc_to_bare_struct (guint32 fourcc)
1400 GstStructure *structure = NULL;
1403 case V4L2_PIX_FMT_MJPEG: /* Motion-JPEG */
1404 case V4L2_PIX_FMT_PJPG: /* Progressive-JPEG */
1405 case V4L2_PIX_FMT_JPEG: /* JFIF JPEG */
1406 structure = gst_structure_new_empty ("image/jpeg");
1408 case V4L2_PIX_FMT_MPEG1:
1409 structure = gst_structure_new ("video/mpeg",
1410 "mpegversion", G_TYPE_INT, 2, NULL);
1412 case V4L2_PIX_FMT_MPEG2:
1413 structure = gst_structure_new ("video/mpeg",
1414 "mpegversion", G_TYPE_INT, 2, NULL);
1416 case V4L2_PIX_FMT_MPEG4:
1417 case V4L2_PIX_FMT_XVID:
1418 structure = gst_structure_new ("video/mpeg",
1419 "mpegversion", G_TYPE_INT, 4, "systemstream",
1420 G_TYPE_BOOLEAN, FALSE, NULL);
1422 case V4L2_PIX_FMT_H263:
1423 structure = gst_structure_new ("video/x-h263",
1424 "variant", G_TYPE_STRING, "itu", NULL);
1426 case V4L2_PIX_FMT_H264: /* H.264 */
1427 structure = gst_structure_new ("video/x-h264",
1428 "stream-format", G_TYPE_STRING, "byte-stream", "alignment",
1429 G_TYPE_STRING, "au", NULL);
1431 case V4L2_PIX_FMT_H264_NO_SC:
1432 structure = gst_structure_new ("video/x-h264",
1433 "stream-format", G_TYPE_STRING, "avc", "alignment",
1434 G_TYPE_STRING, "au", NULL);
1436 case V4L2_PIX_FMT_VC1_ANNEX_G:
1437 case V4L2_PIX_FMT_VC1_ANNEX_L:
1438 structure = gst_structure_new ("video/x-wmv",
1439 "wmvversion", G_TYPE_INT, 3, "format", G_TYPE_STRING, "WVC1", NULL);
1441 case V4L2_PIX_FMT_VP8:
1442 structure = gst_structure_new_empty ("video/x-vp8");
1444 case V4L2_PIX_FMT_VP9:
1445 structure = gst_structure_new_empty ("video/x-vp9");
1447 case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
1448 case V4L2_PIX_FMT_Y16:
1449 case V4L2_PIX_FMT_Y16_BE:
1450 case V4L2_PIX_FMT_XRGB555:
1451 case V4L2_PIX_FMT_RGB555:
1452 case V4L2_PIX_FMT_XRGB555X:
1453 case V4L2_PIX_FMT_RGB555X:
1454 case V4L2_PIX_FMT_RGB565:
1455 case V4L2_PIX_FMT_RGB24:
1456 case V4L2_PIX_FMT_BGR24:
1457 case V4L2_PIX_FMT_RGB32:
1458 case V4L2_PIX_FMT_XRGB32:
1459 case V4L2_PIX_FMT_ARGB32:
1460 case V4L2_PIX_FMT_BGR32:
1461 case V4L2_PIX_FMT_XBGR32:
1462 case V4L2_PIX_FMT_ABGR32:
1463 case V4L2_PIX_FMT_NV12: /* 12 Y/CbCr 4:2:0 */
1464 case V4L2_PIX_FMT_NV12M:
1465 case V4L2_PIX_FMT_NV12MT:
1466 case V4L2_PIX_FMT_NV21: /* 12 Y/CrCb 4:2:0 */
1467 case V4L2_PIX_FMT_NV21M:
1468 case V4L2_PIX_FMT_NV16: /* 16 Y/CbCr 4:2:2 */
1469 case V4L2_PIX_FMT_NV16M:
1470 case V4L2_PIX_FMT_NV61: /* 16 Y/CrCb 4:2:2 */
1471 case V4L2_PIX_FMT_NV61M:
1472 case V4L2_PIX_FMT_NV24: /* 24 Y/CrCb 4:4:4 */
1473 case V4L2_PIX_FMT_YVU410:
1474 case V4L2_PIX_FMT_YUV410:
1475 case V4L2_PIX_FMT_YUV420: /* I420/IYUV */
1476 case V4L2_PIX_FMT_YUV420M:
1477 case V4L2_PIX_FMT_YUYV:
1478 case V4L2_PIX_FMT_YVU420:
1479 case V4L2_PIX_FMT_UYVY:
1480 case V4L2_PIX_FMT_YUV422P:
1481 case V4L2_PIX_FMT_YVYU:
1482 case V4L2_PIX_FMT_YUV411P:{
1483 GstVideoFormat format;
1484 format = gst_v4l2_object_v4l2fourcc_to_video_format (fourcc);
1485 if (format != GST_VIDEO_FORMAT_UNKNOWN)
1486 structure = gst_structure_new ("video/x-raw",
1487 "format", G_TYPE_STRING, gst_video_format_to_string (format), NULL);
1490 case V4L2_PIX_FMT_DV:
1492 gst_structure_new ("video/x-dv", "systemstream", G_TYPE_BOOLEAN, TRUE,
1495 case V4L2_PIX_FMT_MPEG: /* MPEG */
1496 structure = gst_structure_new ("video/mpegts",
1497 "systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
1499 case V4L2_PIX_FMT_WNVA: /* Winnov hw compres */
1501 case V4L2_PIX_FMT_SBGGR8:
1502 case V4L2_PIX_FMT_SGBRG8:
1503 case V4L2_PIX_FMT_SGRBG8:
1504 case V4L2_PIX_FMT_SRGGB8:
1505 structure = gst_structure_new ("video/x-bayer", "format", G_TYPE_STRING,
1506 fourcc == V4L2_PIX_FMT_SBGGR8 ? "bggr" :
1507 fourcc == V4L2_PIX_FMT_SGBRG8 ? "gbrg" :
1508 fourcc == V4L2_PIX_FMT_SGRBG8 ? "grbg" :
1509 /* fourcc == V4L2_PIX_FMT_SRGGB8 ? */ "rggb", NULL);
1511 case V4L2_PIX_FMT_SN9C10X:
1512 structure = gst_structure_new_empty ("video/x-sonix");
1514 case V4L2_PIX_FMT_PWC1:
1515 structure = gst_structure_new_empty ("video/x-pwc1");
1517 case V4L2_PIX_FMT_PWC2:
1518 structure = gst_structure_new_empty ("video/x-pwc2");
1520 case V4L2_PIX_FMT_RGB332:
1521 case V4L2_PIX_FMT_BGR666:
1522 case V4L2_PIX_FMT_ARGB555X:
1523 case V4L2_PIX_FMT_RGB565X:
1524 case V4L2_PIX_FMT_RGB444:
1525 case V4L2_PIX_FMT_YYUV: /* 16 YUV 4:2:2 */
1526 case V4L2_PIX_FMT_HI240: /* 8 8-bit color */
1527 case V4L2_PIX_FMT_Y4:
1528 case V4L2_PIX_FMT_Y6:
1529 case V4L2_PIX_FMT_Y10:
1530 case V4L2_PIX_FMT_Y12:
1531 case V4L2_PIX_FMT_Y10BPACK:
1532 case V4L2_PIX_FMT_YUV444:
1533 case V4L2_PIX_FMT_YUV555:
1534 case V4L2_PIX_FMT_YUV565:
1535 case V4L2_PIX_FMT_Y41P:
1536 case V4L2_PIX_FMT_YUV32:
1537 case V4L2_PIX_FMT_NV12MT_16X16:
1538 case V4L2_PIX_FMT_NV42:
1539 case V4L2_PIX_FMT_H264_MVC:
1541 GST_DEBUG ("Unsupported fourcc 0x%08x %" GST_FOURCC_FORMAT,
1542 fourcc, GST_FOURCC_ARGS (fourcc));
1550 gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc)
1552 GstStructure *template;
1555 template = gst_v4l2_object_v4l2fourcc_to_bare_struct (fourcc);
1557 if (template == NULL)
1560 for (i = 0; i < GST_V4L2_FORMAT_COUNT; i++) {
1561 if (gst_v4l2_formats[i].format != fourcc)
1564 if (gst_v4l2_formats[i].dimensions) {
1565 gst_structure_set (template,
1566 "width", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1567 "height", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1568 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
1579 gst_v4l2_object_get_caps_helper (GstV4L2FormatFlags flags)
1581 GstStructure *structure;
1585 caps = gst_caps_new_empty ();
1586 for (i = 0; i < GST_V4L2_FORMAT_COUNT; i++) {
1588 if ((gst_v4l2_formats[i].flags & flags) == 0)
1592 gst_v4l2_object_v4l2fourcc_to_bare_struct (gst_v4l2_formats[i].format);
1595 GstStructure *alt_s = NULL;
1597 if (gst_v4l2_formats[i].dimensions) {
1598 gst_structure_set (structure,
1599 "width", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1600 "height", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1601 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
1604 switch (gst_v4l2_formats[i].format) {
1605 case V4L2_PIX_FMT_RGB32:
1606 alt_s = gst_structure_copy (structure);
1607 gst_structure_set (alt_s, "format", G_TYPE_STRING, "ARGB", NULL);
1609 case V4L2_PIX_FMT_BGR32:
1610 alt_s = gst_structure_copy (structure);
1611 gst_structure_set (alt_s, "format", G_TYPE_STRING, "BGRA", NULL);
1616 gst_caps_append_structure (caps, structure);
1619 gst_caps_append_structure (caps, alt_s);
1623 return gst_caps_simplify (caps);
1627 gst_v4l2_object_get_all_caps (void)
1629 static GstCaps *caps = NULL;
1631 if (g_once_init_enter (&caps)) {
1632 GstCaps *all_caps = gst_v4l2_object_get_caps_helper (GST_V4L2_ALL);
1633 GST_MINI_OBJECT_FLAG_SET (all_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
1634 g_once_init_leave (&caps, all_caps);
1641 gst_v4l2_object_get_raw_caps (void)
1643 static GstCaps *caps = NULL;
1645 if (g_once_init_enter (&caps)) {
1646 GstCaps *raw_caps = gst_v4l2_object_get_caps_helper (GST_V4L2_RAW);
1647 GST_MINI_OBJECT_FLAG_SET (raw_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
1648 g_once_init_leave (&caps, raw_caps);
1655 gst_v4l2_object_get_codec_caps (void)
1657 static GstCaps *caps = NULL;
1659 if (g_once_init_enter (&caps)) {
1660 GstCaps *codec_caps = gst_v4l2_object_get_caps_helper (GST_V4L2_CODEC);
1661 GST_MINI_OBJECT_FLAG_SET (codec_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
1662 g_once_init_leave (&caps, codec_caps);
1668 /* collect data for the given caps
1669 * @caps: given input caps
1670 * @format: location for the v4l format
1671 * @w/@h: location for width and height
1672 * @fps_n/@fps_d: location for framerate
1673 * @size: location for expected size of the frame or 0 if unknown
1676 gst_v4l2_object_get_caps_info (GstV4l2Object * v4l2object, GstCaps * caps,
1677 struct v4l2_fmtdesc **format, GstVideoInfo * info)
1679 GstStructure *structure;
1680 guint32 fourcc = 0, fourcc_nc = 0;
1681 const gchar *mimetype;
1682 struct v4l2_fmtdesc *fmt = NULL;
1684 structure = gst_caps_get_structure (caps, 0);
1686 mimetype = gst_structure_get_name (structure);
1688 if (!gst_video_info_from_caps (info, caps))
1689 goto invalid_format;
1691 if (g_str_equal (mimetype, "video/x-raw")) {
1692 switch (GST_VIDEO_INFO_FORMAT (info)) {
1693 case GST_VIDEO_FORMAT_I420:
1694 fourcc = V4L2_PIX_FMT_YUV420;
1695 fourcc_nc = V4L2_PIX_FMT_YUV420M;
1697 case GST_VIDEO_FORMAT_YUY2:
1698 fourcc = V4L2_PIX_FMT_YUYV;
1700 case GST_VIDEO_FORMAT_UYVY:
1701 fourcc = V4L2_PIX_FMT_UYVY;
1703 case GST_VIDEO_FORMAT_YV12:
1704 fourcc = V4L2_PIX_FMT_YVU420;
1706 case GST_VIDEO_FORMAT_Y41B:
1707 fourcc = V4L2_PIX_FMT_YUV411P;
1709 case GST_VIDEO_FORMAT_Y42B:
1710 fourcc = V4L2_PIX_FMT_YUV422P;
1712 case GST_VIDEO_FORMAT_NV12:
1713 fourcc = V4L2_PIX_FMT_NV12;
1714 fourcc_nc = V4L2_PIX_FMT_NV12M;
1716 case GST_VIDEO_FORMAT_NV12_64Z32:
1717 fourcc_nc = V4L2_PIX_FMT_NV12MT;
1719 case GST_VIDEO_FORMAT_NV21:
1720 fourcc = V4L2_PIX_FMT_NV21;
1721 fourcc_nc = V4L2_PIX_FMT_NV21M;
1723 case GST_VIDEO_FORMAT_NV16:
1724 fourcc = V4L2_PIX_FMT_NV16;
1725 fourcc_nc = V4L2_PIX_FMT_NV16M;
1727 case GST_VIDEO_FORMAT_NV61:
1728 fourcc = V4L2_PIX_FMT_NV61;
1729 fourcc_nc = V4L2_PIX_FMT_NV61M;
1731 case GST_VIDEO_FORMAT_NV24:
1732 fourcc = V4L2_PIX_FMT_NV24;
1734 case GST_VIDEO_FORMAT_YVYU:
1735 fourcc = V4L2_PIX_FMT_YVYU;
1737 case GST_VIDEO_FORMAT_RGB15:
1738 fourcc = V4L2_PIX_FMT_RGB555;
1739 fourcc_nc = V4L2_PIX_FMT_XRGB555;
1741 case GST_VIDEO_FORMAT_RGB16:
1742 fourcc = V4L2_PIX_FMT_RGB565;
1744 case GST_VIDEO_FORMAT_RGB:
1745 fourcc = V4L2_PIX_FMT_RGB24;
1747 case GST_VIDEO_FORMAT_BGR:
1748 fourcc = V4L2_PIX_FMT_BGR24;
1750 case GST_VIDEO_FORMAT_xRGB:
1751 fourcc = V4L2_PIX_FMT_RGB32;
1752 fourcc_nc = V4L2_PIX_FMT_XRGB32;
1754 case GST_VIDEO_FORMAT_ARGB:
1755 fourcc = V4L2_PIX_FMT_RGB32;
1756 fourcc_nc = V4L2_PIX_FMT_ARGB32;
1758 case GST_VIDEO_FORMAT_BGRx:
1759 fourcc = V4L2_PIX_FMT_BGR32;
1760 fourcc_nc = V4L2_PIX_FMT_XBGR32;
1762 case GST_VIDEO_FORMAT_BGRA:
1763 fourcc = V4L2_PIX_FMT_BGR32;
1764 fourcc_nc = V4L2_PIX_FMT_ABGR32;
1766 case GST_VIDEO_FORMAT_GRAY8:
1767 fourcc = V4L2_PIX_FMT_GREY;
1769 case GST_VIDEO_FORMAT_GRAY16_LE:
1770 fourcc = V4L2_PIX_FMT_Y16;
1772 case GST_VIDEO_FORMAT_GRAY16_BE:
1773 fourcc = V4L2_PIX_FMT_Y16_BE;
1779 if (g_str_equal (mimetype, "video/mpegts")) {
1780 fourcc = V4L2_PIX_FMT_MPEG;
1781 } else if (g_str_equal (mimetype, "video/x-dv")) {
1782 fourcc = V4L2_PIX_FMT_DV;
1783 } else if (g_str_equal (mimetype, "image/jpeg")) {
1784 fourcc = V4L2_PIX_FMT_JPEG;
1785 } else if (g_str_equal (mimetype, "video/mpeg")) {
1787 if (gst_structure_get_int (structure, "mpegversion", &version)) {
1790 fourcc = V4L2_PIX_FMT_MPEG1;
1793 fourcc = V4L2_PIX_FMT_MPEG2;
1796 fourcc = V4L2_PIX_FMT_MPEG4;
1797 fourcc_nc = V4L2_PIX_FMT_XVID;
1803 } else if (g_str_equal (mimetype, "video/x-h263")) {
1804 fourcc = V4L2_PIX_FMT_H263;
1805 } else if (g_str_equal (mimetype, "video/x-h264")) {
1806 const gchar *stream_format =
1807 gst_structure_get_string (structure, "stream-format");
1808 if (g_str_equal (stream_format, "avc"))
1809 fourcc = V4L2_PIX_FMT_H264_NO_SC;
1811 fourcc = V4L2_PIX_FMT_H264;
1812 } else if (g_str_equal (mimetype, "video/x-vp8")) {
1813 fourcc = V4L2_PIX_FMT_VP8;
1814 } else if (g_str_equal (mimetype, "video/x-vp9")) {
1815 fourcc = V4L2_PIX_FMT_VP9;
1816 } else if (g_str_equal (mimetype, "video/x-bayer")) {
1817 const gchar *format = gst_structure_get_string (structure, "format");
1819 if (!g_ascii_strcasecmp (format, "bggr"))
1820 fourcc = V4L2_PIX_FMT_SBGGR8;
1821 else if (!g_ascii_strcasecmp (format, "gbrg"))
1822 fourcc = V4L2_PIX_FMT_SGBRG8;
1823 else if (!g_ascii_strcasecmp (format, "grbg"))
1824 fourcc = V4L2_PIX_FMT_SGRBG8;
1825 else if (!g_ascii_strcasecmp (format, "rggb"))
1826 fourcc = V4L2_PIX_FMT_SRGGB8;
1828 } else if (g_str_equal (mimetype, "video/x-sonix")) {
1829 fourcc = V4L2_PIX_FMT_SN9C10X;
1830 } else if (g_str_equal (mimetype, "video/x-pwc1")) {
1831 fourcc = V4L2_PIX_FMT_PWC1;
1832 } else if (g_str_equal (mimetype, "video/x-pwc2")) {
1833 fourcc = V4L2_PIX_FMT_PWC2;
1838 /* Prefer the non-contiguous if supported */
1839 v4l2object->prefered_non_contiguous = TRUE;
1842 fmt = gst_v4l2_object_get_format_from_fourcc (v4l2object, fourcc_nc);
1843 else if (fourcc == 0)
1844 goto unhandled_format;
1847 fmt = gst_v4l2_object_get_format_from_fourcc (v4l2object, fourcc);
1848 v4l2object->prefered_non_contiguous = FALSE;
1852 goto unsupported_format;
1861 GST_DEBUG_OBJECT (v4l2object, "invalid format");
1866 GST_DEBUG_OBJECT (v4l2object, "unhandled format");
1871 GST_DEBUG_OBJECT (v4l2object, "unsupported format");
1877 gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
1878 guint32 pixelformat, gint * width, gint * height);
1881 gst_v4l2_object_add_aspect_ratio (GstV4l2Object * v4l2object, GstStructure * s)
1883 if (v4l2object->keep_aspect && v4l2object->par)
1884 gst_structure_set_value (s, "pixel-aspect-ratio", v4l2object->par);
1887 /* returns TRUE if the value was changed in place, otherwise FALSE */
1889 gst_v4l2src_value_simplify (GValue * val)
1891 /* simplify list of one value to one value */
1892 if (GST_VALUE_HOLDS_LIST (val) && gst_value_list_get_size (val) == 1) {
1893 const GValue *list_val;
1894 GValue new_val = G_VALUE_INIT;
1896 list_val = gst_value_list_get_value (val, 0);
1897 g_value_init (&new_val, G_VALUE_TYPE (list_val));
1898 g_value_copy (list_val, &new_val);
1899 g_value_unset (val);
1908 gst_v4l2_object_get_interlace_mode (enum v4l2_field field,
1909 GstVideoInterlaceMode * interlace_mode)
1911 /* NB: If you add new return values, please fix mode_strings in
1912 * gst_v4l2_object_add_interlace_mode */
1914 case V4L2_FIELD_ANY:
1916 ("Driver bug detected - check driver with v4l2-compliance from http://git.linuxtv.org/v4l-utils.git\n");
1918 case V4L2_FIELD_NONE:
1919 *interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
1921 case V4L2_FIELD_INTERLACED:
1922 case V4L2_FIELD_INTERLACED_TB:
1923 case V4L2_FIELD_INTERLACED_BT:
1924 *interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
1927 GST_ERROR ("Unknown enum v4l2_field %d", field);
1933 gst_v4l2_object_get_colorspace (struct v4l2_format *fmt,
1934 GstVideoColorimetry * cinfo)
1937 gst_v4l2_object_v4l2fourcc_is_rgb (fmt->fmt.pix.pixelformat);
1938 enum v4l2_colorspace colorspace;
1939 enum v4l2_quantization range;
1940 enum v4l2_ycbcr_encoding matrix;
1941 enum v4l2_xfer_func transfer;
1942 gboolean ret = TRUE;
1944 if (V4L2_TYPE_IS_MULTIPLANAR (fmt->type)) {
1945 colorspace = fmt->fmt.pix_mp.colorspace;
1946 range = fmt->fmt.pix_mp.quantization;
1947 matrix = fmt->fmt.pix_mp.ycbcr_enc;
1948 transfer = fmt->fmt.pix_mp.xfer_func;
1950 colorspace = fmt->fmt.pix.colorspace;
1951 range = fmt->fmt.pix.quantization;
1952 matrix = fmt->fmt.pix.ycbcr_enc;
1953 transfer = fmt->fmt.pix.xfer_func;
1956 /* First step, set the defaults for each primaries */
1957 switch (colorspace) {
1958 case V4L2_COLORSPACE_SMPTE170M:
1959 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1960 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
1961 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
1962 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_SMPTE170M;
1964 case V4L2_COLORSPACE_REC709:
1965 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1966 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT709;
1967 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
1968 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT709;
1970 case V4L2_COLORSPACE_SRGB:
1971 case V4L2_COLORSPACE_JPEG:
1972 cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
1973 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
1974 cinfo->transfer = GST_VIDEO_TRANSFER_SRGB;
1975 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT709;
1977 case V4L2_COLORSPACE_ADOBERGB:
1978 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1979 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
1980 cinfo->transfer = GST_VIDEO_TRANSFER_ADOBERGB;
1981 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_ADOBERGB;
1983 case V4L2_COLORSPACE_BT2020:
1984 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1985 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT2020;
1986 cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12;
1987 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT2020;
1989 case V4L2_COLORSPACE_SMPTE240M:
1990 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1991 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_SMPTE240M;
1992 cinfo->transfer = GST_VIDEO_TRANSFER_SMPTE240M;
1993 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_SMPTE240M;
1995 case V4L2_COLORSPACE_470_SYSTEM_M:
1996 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1997 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
1998 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
1999 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT470M;
2001 case V4L2_COLORSPACE_470_SYSTEM_BG:
2002 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2003 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
2004 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
2005 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT470BG;
2007 case V4L2_COLORSPACE_RAW:
2008 /* Explicitly unknown */
2009 cinfo->range = GST_VIDEO_COLOR_RANGE_UNKNOWN;
2010 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_UNKNOWN;
2011 cinfo->transfer = GST_VIDEO_TRANSFER_UNKNOWN;
2012 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_UNKNOWN;
2015 GST_DEBUG ("Unknown enum v4l2_colorspace %d", colorspace);
2023 /* Second step, apply any custom variation */
2025 case V4L2_QUANTIZATION_FULL_RANGE:
2026 cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
2028 case V4L2_QUANTIZATION_LIM_RANGE:
2029 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2031 case V4L2_QUANTIZATION_DEFAULT:
2032 /* replicated V4L2_MAP_QUANTIZATION_DEFAULT macro behavior */
2033 if (is_rgb && colorspace == V4L2_COLORSPACE_BT2020)
2034 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2035 else if (is_rgb || matrix == V4L2_YCBCR_ENC_XV601
2036 || matrix == V4L2_YCBCR_ENC_XV709
2037 || colorspace == V4L2_COLORSPACE_JPEG)
2038 cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
2040 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2043 GST_WARNING ("Unknown enum v4l2_quantization value %d", range);
2044 cinfo->range = GST_VIDEO_COLOR_RANGE_UNKNOWN;
2049 case V4L2_YCBCR_ENC_XV601:
2050 case V4L2_YCBCR_ENC_SYCC:
2051 GST_FIXME ("XV601 and SYCC not defined, assuming 601");
2053 case V4L2_YCBCR_ENC_601:
2054 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
2056 case V4L2_YCBCR_ENC_XV709:
2057 GST_FIXME ("XV709 not defined, assuming 709");
2059 case V4L2_YCBCR_ENC_709:
2060 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT709;
2062 case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
2063 GST_FIXME ("BT2020 with constant luma is not defined, assuming BT2020");
2065 case V4L2_YCBCR_ENC_BT2020:
2066 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT2020;
2068 case V4L2_YCBCR_ENC_SMPTE240M:
2069 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_SMPTE240M;
2071 case V4L2_YCBCR_ENC_DEFAULT:
2072 /* nothing, just use defaults for colorspace */
2075 GST_WARNING ("Unknown enum v4l2_ycbcr_encoding value %d", matrix);
2076 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_UNKNOWN;
2080 /* Set identity matrix for R'G'B' formats to avoid creating
2081 * confusion. This though is cosmetic as it's now properly ignored by
2082 * the video info API and videoconvert. */
2084 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_RGB;
2087 case V4L2_XFER_FUNC_709:
2088 if (colorspace == V4L2_COLORSPACE_BT2020 && fmt->fmt.pix.height >= 2160)
2089 cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12;
2091 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
2093 case V4L2_XFER_FUNC_SRGB:
2094 cinfo->transfer = GST_VIDEO_TRANSFER_SRGB;
2096 case V4L2_XFER_FUNC_ADOBERGB:
2097 cinfo->transfer = GST_VIDEO_TRANSFER_ADOBERGB;
2099 case V4L2_XFER_FUNC_SMPTE240M:
2100 cinfo->transfer = GST_VIDEO_TRANSFER_SMPTE240M;
2102 case V4L2_XFER_FUNC_NONE:
2103 cinfo->transfer = GST_VIDEO_TRANSFER_GAMMA10;
2105 case V4L2_XFER_FUNC_DEFAULT:
2106 /* nothing, just use defaults for colorspace */
2109 GST_WARNING ("Unknown enum v4l2_xfer_func value %d", transfer);
2110 cinfo->transfer = GST_VIDEO_TRANSFER_UNKNOWN;
2119 gst_v4l2_object_try_fmt (GstV4l2Object * v4l2object,
2120 struct v4l2_format *try_fmt)
2122 int fd = v4l2object->video_fd;
2123 struct v4l2_format fmt;
2126 memcpy (&fmt, try_fmt, sizeof (fmt));
2127 r = v4l2object->ioctl (fd, VIDIOC_TRY_FMT, &fmt);
2129 if (r < 0 && errno == ENOTTY) {
2130 /* The driver might not implement TRY_FMT, in which case we will try
2132 if (GST_V4L2_IS_ACTIVE (v4l2object))
2135 memcpy (&fmt, try_fmt, sizeof (fmt));
2136 r = v4l2object->ioctl (fd, VIDIOC_S_FMT, &fmt);
2138 memcpy (try_fmt, &fmt, sizeof (fmt));
2143 memcpy (try_fmt, &fmt, sizeof (fmt));
2144 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2145 "Unable to try format: %s", g_strerror (errno));
2151 gst_v4l2_object_add_interlace_mode (GstV4l2Object * v4l2object,
2152 GstStructure * s, guint32 width, guint32 height, guint32 pixelformat)
2154 struct v4l2_format fmt;
2155 GValue interlace_formats = { 0, };
2156 GstVideoInterlaceMode interlace_mode, prev = -1;
2158 const gchar *mode_strings[] = { "progressive",
2163 if (!g_str_equal (gst_structure_get_name (s), "video/x-raw"))
2166 if (v4l2object->never_interlaced) {
2167 gst_structure_set (s, "interlace-mode", G_TYPE_STRING, "progressive", NULL);
2171 g_value_init (&interlace_formats, GST_TYPE_LIST);
2173 /* Try twice - once for NONE, once for INTERLACED. */
2174 memset (&fmt, 0, sizeof (fmt));
2175 fmt.type = v4l2object->type;
2176 fmt.fmt.pix.width = width;
2177 fmt.fmt.pix.height = height;
2178 fmt.fmt.pix.pixelformat = pixelformat;
2179 fmt.fmt.pix.field = V4L2_FIELD_NONE;
2181 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0 &&
2182 gst_v4l2_object_get_interlace_mode (fmt.fmt.pix.field, &interlace_mode)) {
2183 GValue interlace_enum = { 0, };
2184 g_value_init (&interlace_enum, G_TYPE_STRING);
2185 g_value_set_string (&interlace_enum, mode_strings[interlace_mode]);
2186 gst_value_list_append_and_take_value (&interlace_formats, &interlace_enum);
2187 prev = interlace_mode;
2190 memset (&fmt, 0, sizeof (fmt));
2191 fmt.type = v4l2object->type;
2192 fmt.fmt.pix.width = width;
2193 fmt.fmt.pix.height = height;
2194 fmt.fmt.pix.pixelformat = pixelformat;
2195 fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
2197 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0 &&
2198 gst_v4l2_object_get_interlace_mode (fmt.fmt.pix.field, &interlace_mode) &&
2199 prev != interlace_mode) {
2200 GValue interlace_enum = { 0, };
2201 g_value_init (&interlace_enum, G_TYPE_STRING);
2202 g_value_set_string (&interlace_enum, mode_strings[interlace_mode]);
2203 gst_value_list_append_and_take_value (&interlace_formats, &interlace_enum);
2206 if (gst_v4l2src_value_simplify (&interlace_formats)
2207 || gst_value_list_get_size (&interlace_formats) > 0)
2208 gst_structure_take_value (s, "interlace-mode", &interlace_formats);
2210 GST_WARNING_OBJECT (v4l2object, "Failed to determine interlace mode");
2216 gst_v4l2_object_fill_colorimetry_list (GValue * list,
2217 GstVideoColorimetry * cinfo)
2219 GValue colorimetry = G_VALUE_INIT;
2222 gboolean found = FALSE;
2224 g_value_init (&colorimetry, G_TYPE_STRING);
2225 g_value_take_string (&colorimetry, gst_video_colorimetry_to_string (cinfo));
2227 /* only insert if no duplicate */
2228 size = gst_value_list_get_size (list);
2229 for (i = 0; i < size; i++) {
2232 tmp = gst_value_list_get_value (list, i);
2233 if (gst_value_compare (&colorimetry, tmp) == GST_VALUE_EQUAL) {
2240 gst_value_list_append_and_take_value (list, &colorimetry);
2242 g_value_unset (&colorimetry);
2246 gst_v4l2_object_add_colorspace (GstV4l2Object * v4l2object, GstStructure * s,
2247 guint32 width, guint32 height, guint32 pixelformat)
2249 struct v4l2_format fmt;
2250 GValue list = G_VALUE_INIT;
2251 GstVideoColorimetry cinfo;
2252 enum v4l2_colorspace req_cspace;
2254 memset (&fmt, 0, sizeof (fmt));
2255 fmt.type = v4l2object->type;
2256 fmt.fmt.pix.width = width;
2257 fmt.fmt.pix.height = height;
2258 fmt.fmt.pix.pixelformat = pixelformat;
2260 g_value_init (&list, GST_TYPE_LIST);
2262 /* step 1: get device default colorspace and insert it first as
2263 * it should be the preferred one */
2264 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0) {
2265 if (gst_v4l2_object_get_colorspace (&fmt, &cinfo))
2266 gst_v4l2_object_fill_colorimetry_list (&list, &cinfo);
2269 /* step 2: probe all colorspace other than default
2270 * We don't probe all colorspace, range, matrix and transfer combination to
2271 * avoid ioctl flooding which could greatly increase initialization time
2272 * with low-speed devices (UVC...) */
2273 for (req_cspace = V4L2_COLORSPACE_SMPTE170M;
2274 req_cspace <= V4L2_COLORSPACE_RAW; req_cspace++) {
2275 /* V4L2_COLORSPACE_BT878 is deprecated and shall not be used, so skip */
2276 if (req_cspace == V4L2_COLORSPACE_BT878)
2279 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
2280 fmt.fmt.pix_mp.colorspace = req_cspace;
2282 fmt.fmt.pix.colorspace = req_cspace;
2284 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0) {
2285 enum v4l2_colorspace colorspace;
2287 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
2288 colorspace = fmt.fmt.pix_mp.colorspace;
2290 colorspace = fmt.fmt.pix.colorspace;
2292 if (colorspace == req_cspace) {
2293 if (gst_v4l2_object_get_colorspace (&fmt, &cinfo))
2294 gst_v4l2_object_fill_colorimetry_list (&list, &cinfo);
2299 if (gst_value_list_get_size (&list) > 0)
2300 gst_structure_take_value (s, "colorimetry", &list);
2302 g_value_unset (&list);
2307 /* The frame interval enumeration code first appeared in Linux 2.6.19. */
2308 static GstStructure *
2309 gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
2310 guint32 pixelformat,
2311 guint32 width, guint32 height, const GstStructure * template)
2313 gint fd = v4l2object->video_fd;
2314 struct v4l2_frmivalenum ival;
2317 GValue rates = { 0, };
2319 memset (&ival, 0, sizeof (struct v4l2_frmivalenum));
2321 ival.pixel_format = pixelformat;
2323 ival.height = height;
2325 GST_LOG_OBJECT (v4l2object->dbg_obj,
2326 "get frame interval for %ux%u, %" GST_FOURCC_FORMAT, width, height,
2327 GST_FOURCC_ARGS (pixelformat));
2329 /* keep in mind that v4l2 gives us frame intervals (durations); we invert the
2330 * fraction to get framerate */
2331 if (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) < 0)
2332 goto enum_frameintervals_failed;
2334 if (ival.type == V4L2_FRMIVAL_TYPE_DISCRETE) {
2335 GValue rate = { 0, };
2337 g_value_init (&rates, GST_TYPE_LIST);
2338 g_value_init (&rate, GST_TYPE_FRACTION);
2341 num = ival.discrete.numerator;
2342 denom = ival.discrete.denominator;
2344 if (num > G_MAXINT || denom > G_MAXINT) {
2345 /* let us hope we don't get here... */
2350 GST_LOG_OBJECT (v4l2object->dbg_obj, "adding discrete framerate: %d/%d",
2353 /* swap to get the framerate */
2354 gst_value_set_fraction (&rate, denom, num);
2355 gst_value_list_append_value (&rates, &rate);
2358 } while (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) >= 0);
2359 } else if (ival.type == V4L2_FRMIVAL_TYPE_STEPWISE) {
2360 GValue min = { 0, };
2361 GValue step = { 0, };
2362 GValue max = { 0, };
2363 gboolean added = FALSE;
2364 guint32 minnum, mindenom;
2365 guint32 maxnum, maxdenom;
2367 g_value_init (&rates, GST_TYPE_LIST);
2369 g_value_init (&min, GST_TYPE_FRACTION);
2370 g_value_init (&step, GST_TYPE_FRACTION);
2371 g_value_init (&max, GST_TYPE_FRACTION);
2374 minnum = ival.stepwise.min.numerator;
2375 mindenom = ival.stepwise.min.denominator;
2376 if (minnum > G_MAXINT || mindenom > G_MAXINT) {
2380 GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise min frame interval: %d/%d",
2382 gst_value_set_fraction (&min, minnum, mindenom);
2385 maxnum = ival.stepwise.max.numerator;
2386 maxdenom = ival.stepwise.max.denominator;
2387 if (maxnum > G_MAXINT || maxdenom > G_MAXINT) {
2392 GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise max frame interval: %d/%d",
2394 gst_value_set_fraction (&max, maxnum, maxdenom);
2397 num = ival.stepwise.step.numerator;
2398 denom = ival.stepwise.step.denominator;
2399 if (num > G_MAXINT || denom > G_MAXINT) {
2404 if (num == 0 || denom == 0) {
2405 /* in this case we have a wrong fraction or no step, set the step to max
2406 * so that we only add the min value in the loop below */
2411 /* since we only have gst_value_fraction_subtract and not add, negate the
2413 GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise step frame interval: %d/%d",
2415 gst_value_set_fraction (&step, -num, denom);
2417 while (gst_value_compare (&min, &max) != GST_VALUE_GREATER_THAN) {
2418 GValue rate = { 0, };
2420 num = gst_value_get_fraction_numerator (&min);
2421 denom = gst_value_get_fraction_denominator (&min);
2422 GST_LOG_OBJECT (v4l2object->dbg_obj, "adding stepwise framerate: %d/%d",
2425 /* invert to get the framerate */
2426 g_value_init (&rate, GST_TYPE_FRACTION);
2427 gst_value_set_fraction (&rate, denom, num);
2428 gst_value_list_append_value (&rates, &rate);
2431 /* we're actually adding because step was negated above. This is because
2432 * there is no _add function... */
2433 if (!gst_value_fraction_subtract (&min, &min, &step)) {
2434 GST_WARNING_OBJECT (v4l2object->dbg_obj, "could not step fraction!");
2439 /* no range was added, leave the default range from the template */
2440 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2441 "no range added, leaving default");
2442 g_value_unset (&rates);
2444 } else if (ival.type == V4L2_FRMIVAL_TYPE_CONTINUOUS) {
2445 guint32 maxnum, maxdenom;
2447 g_value_init (&rates, GST_TYPE_FRACTION_RANGE);
2449 num = ival.stepwise.min.numerator;
2450 denom = ival.stepwise.min.denominator;
2451 if (num > G_MAXINT || denom > G_MAXINT) {
2456 maxnum = ival.stepwise.max.numerator;
2457 maxdenom = ival.stepwise.max.denominator;
2458 if (maxnum > G_MAXINT || maxdenom > G_MAXINT) {
2463 GST_LOG_OBJECT (v4l2object->dbg_obj,
2464 "continuous frame interval %d/%d to %d/%d", maxdenom, maxnum, denom,
2467 gst_value_set_fraction_range_full (&rates, maxdenom, maxnum, denom, num);
2473 s = gst_structure_copy (template);
2474 gst_structure_set (s, "width", G_TYPE_INT, (gint) width,
2475 "height", G_TYPE_INT, (gint) height, NULL);
2477 gst_v4l2_object_add_aspect_ratio (v4l2object, s);
2479 if (!v4l2object->skip_try_fmt_probes) {
2480 gst_v4l2_object_add_interlace_mode (v4l2object, s, width, height,
2482 gst_v4l2_object_add_colorspace (v4l2object, s, width, height, pixelformat);
2485 if (G_IS_VALUE (&rates)) {
2486 gst_v4l2src_value_simplify (&rates);
2487 /* only change the framerate on the template when we have a valid probed new
2489 gst_structure_take_value (s, "framerate", &rates);
2490 } else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2491 v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
2492 gst_structure_set (s, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT,
2498 enum_frameintervals_failed:
2500 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2501 "Unable to enumerate intervals for %" GST_FOURCC_FORMAT "@%ux%u",
2502 GST_FOURCC_ARGS (pixelformat), width, height);
2507 /* I don't see how this is actually an error, we ignore the format then */
2508 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2509 "Unknown frame interval type at %" GST_FOURCC_FORMAT "@%ux%u: %u",
2510 GST_FOURCC_ARGS (pixelformat), width, height, ival.type);
2516 sort_by_frame_size (GstStructure * s1, GstStructure * s2)
2520 gst_structure_get_int (s1, "width", &w1);
2521 gst_structure_get_int (s1, "height", &h1);
2522 gst_structure_get_int (s2, "width", &w2);
2523 gst_structure_get_int (s2, "height", &h2);
2525 /* I think it's safe to assume that this won't overflow for a while */
2526 return ((w2 * h2) - (w1 * h1));
2530 gst_v4l2_object_update_and_append (GstV4l2Object * v4l2object,
2531 guint32 format, GstCaps * caps, GstStructure * s)
2533 GstStructure *alt_s = NULL;
2535 /* Encoded stream on output buffer need to be parsed */
2536 if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
2537 v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
2540 for (; i < GST_V4L2_FORMAT_COUNT; i++) {
2541 if (format == gst_v4l2_formats[i].format &&
2542 gst_v4l2_formats[i].flags & GST_V4L2_CODEC &&
2543 !(gst_v4l2_formats[i].flags & GST_V4L2_NO_PARSE)) {
2544 gst_structure_set (s, "parsed", G_TYPE_BOOLEAN, TRUE, NULL);
2550 if (v4l2object->has_alpha_component &&
2551 (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2552 v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) {
2554 case V4L2_PIX_FMT_RGB32:
2555 alt_s = gst_structure_copy (s);
2556 gst_structure_set (alt_s, "format", G_TYPE_STRING, "ARGB", NULL);
2558 case V4L2_PIX_FMT_BGR32:
2559 alt_s = gst_structure_copy (s);
2560 gst_structure_set (alt_s, "format", G_TYPE_STRING, "BGRA", NULL);
2567 gst_caps_append_structure (caps, s);
2570 gst_caps_append_structure (caps, alt_s);
2574 gst_v4l2_object_probe_caps_for_format (GstV4l2Object * v4l2object,
2575 guint32 pixelformat, const GstStructure * template)
2577 GstCaps *ret = gst_caps_new_empty ();
2579 gint fd = v4l2object->video_fd;
2580 struct v4l2_frmsizeenum size;
2581 GList *results = NULL;
2584 if (pixelformat == GST_MAKE_FOURCC ('M', 'P', 'E', 'G')) {
2585 gst_caps_append_structure (ret, gst_structure_copy (template));
2589 memset (&size, 0, sizeof (struct v4l2_frmsizeenum));
2591 size.pixel_format = pixelformat;
2593 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2594 "Enumerating frame sizes for %" GST_FOURCC_FORMAT,
2595 GST_FOURCC_ARGS (pixelformat));
2597 if (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) < 0)
2598 goto enum_framesizes_failed;
2600 if (size.type == V4L2_FRMSIZE_TYPE_DISCRETE) {
2602 GST_LOG_OBJECT (v4l2object->dbg_obj, "got discrete frame size %dx%d",
2603 size.discrete.width, size.discrete.height);
2605 w = MIN (size.discrete.width, G_MAXINT);
2606 h = MIN (size.discrete.height, G_MAXINT);
2610 gst_v4l2_object_probe_caps_for_format_and_size (v4l2object,
2611 pixelformat, w, h, template);
2614 results = g_list_prepend (results, tmp);
2618 } while (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) >= 0);
2619 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2620 "done iterating discrete frame sizes");
2621 } else if (size.type == V4L2_FRMSIZE_TYPE_STEPWISE) {
2622 guint32 maxw, maxh, step_w, step_h;
2624 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "we have stepwise frame sizes:");
2625 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min width: %d",
2626 size.stepwise.min_width);
2627 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2628 size.stepwise.min_height);
2629 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "max width: %d",
2630 size.stepwise.max_width);
2631 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2632 size.stepwise.max_height);
2633 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "step width: %d",
2634 size.stepwise.step_width);
2635 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "step height: %d",
2636 size.stepwise.step_height);
2638 w = MAX (size.stepwise.min_width, 1);
2639 h = MAX (size.stepwise.min_height, 1);
2640 maxw = MIN (size.stepwise.max_width, G_MAXINT);
2641 maxh = MIN (size.stepwise.max_height, G_MAXINT);
2643 step_w = MAX (size.stepwise.step_width, 1);
2644 step_h = MAX (size.stepwise.step_height, 1);
2646 /* FIXME: check for sanity and that min/max are multiples of the steps */
2648 /* we only query details for the max width/height since it's likely the
2649 * most restricted if there are any resolution-dependent restrictions */
2650 tmp = gst_v4l2_object_probe_caps_for_format_and_size (v4l2object,
2651 pixelformat, maxw, maxh, template);
2654 GValue step_range = G_VALUE_INIT;
2656 g_value_init (&step_range, GST_TYPE_INT_RANGE);
2657 gst_value_set_int_range_step (&step_range, w, maxw, step_w);
2658 gst_structure_set_value (tmp, "width", &step_range);
2660 gst_value_set_int_range_step (&step_range, h, maxh, step_h);
2661 gst_structure_take_value (tmp, "height", &step_range);
2663 /* no point using the results list here, since there's only one struct */
2664 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
2666 } else if (size.type == V4L2_FRMSIZE_TYPE_CONTINUOUS) {
2669 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "we have continuous frame sizes:");
2670 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min width: %d",
2671 size.stepwise.min_width);
2672 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2673 size.stepwise.min_height);
2674 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "max width: %d",
2675 size.stepwise.max_width);
2676 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2677 size.stepwise.max_height);
2679 w = MAX (size.stepwise.min_width, 1);
2680 h = MAX (size.stepwise.min_height, 1);
2681 maxw = MIN (size.stepwise.max_width, G_MAXINT);
2682 maxh = MIN (size.stepwise.max_height, G_MAXINT);
2685 gst_v4l2_object_probe_caps_for_format_and_size (v4l2object, pixelformat,
2688 gst_structure_set (tmp, "width", GST_TYPE_INT_RANGE, (gint) w,
2689 (gint) maxw, "height", GST_TYPE_INT_RANGE, (gint) h, (gint) maxh,
2692 /* no point using the results list here, since there's only one struct */
2693 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
2699 /* we use an intermediary list to store and then sort the results of the
2700 * probing because we can't make any assumptions about the order in which
2701 * the driver will give us the sizes, but we want the final caps to contain
2702 * the results starting with the highest resolution and having the lowest
2703 * resolution last, since order in caps matters for things like fixation. */
2704 results = g_list_sort (results, (GCompareFunc) sort_by_frame_size);
2705 while (results != NULL) {
2706 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret,
2708 results = g_list_delete_link (results, results);
2711 if (gst_caps_is_empty (ret))
2712 goto enum_framesizes_no_results;
2717 enum_framesizes_failed:
2719 /* I don't see how this is actually an error */
2720 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2721 "Failed to enumerate frame sizes for pixelformat %" GST_FOURCC_FORMAT
2722 " (%s)", GST_FOURCC_ARGS (pixelformat), g_strerror (errno));
2723 goto default_frame_sizes;
2725 enum_framesizes_no_results:
2727 /* it's possible that VIDIOC_ENUM_FRAMESIZES is defined but the driver in
2728 * question doesn't actually support it yet */
2729 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2730 "No results for pixelformat %" GST_FOURCC_FORMAT
2731 " enumerating frame sizes, trying fallback",
2732 GST_FOURCC_ARGS (pixelformat));
2733 goto default_frame_sizes;
2737 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2738 "Unknown frame sizeenum type for pixelformat %" GST_FOURCC_FORMAT
2739 ": %u", GST_FOURCC_ARGS (pixelformat), size.type);
2740 goto default_frame_sizes;
2743 default_frame_sizes:
2745 gint min_w, max_w, min_h, max_h, fix_num = 0, fix_denom = 0;
2747 /* This code is for Linux < 2.6.19 */
2749 max_w = max_h = GST_V4L2_MAX_SIZE;
2750 if (!gst_v4l2_object_get_nearest_size (v4l2object, pixelformat, &min_w,
2752 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2753 "Could not probe minimum capture size for pixelformat %"
2754 GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
2756 if (!gst_v4l2_object_get_nearest_size (v4l2object, pixelformat, &max_w,
2758 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2759 "Could not probe maximum capture size for pixelformat %"
2760 GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
2763 /* Since we can't get framerate directly, try to use the current norm */
2764 if (v4l2object->tv_norm && v4l2object->norms) {
2766 GstTunerNorm *norm = NULL;
2767 GstTunerNorm *current =
2768 gst_v4l2_tuner_get_norm_by_std_id (v4l2object, v4l2object->tv_norm);
2770 for (norms = v4l2object->norms; norms != NULL; norms = norms->next) {
2771 norm = (GstTunerNorm *) norms->data;
2772 if (!strcmp (norm->label, current->label))
2775 /* If it's possible, set framerate to that (discrete) value */
2777 fix_num = gst_value_get_fraction_numerator (&norm->framerate);
2778 fix_denom = gst_value_get_fraction_denominator (&norm->framerate);
2782 tmp = gst_structure_copy (template);
2784 gst_structure_set (tmp, "framerate", GST_TYPE_FRACTION, fix_num,
2786 } else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2787 v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
2788 /* if norm can't be used, copy the template framerate */
2789 gst_structure_set (tmp, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
2794 gst_structure_set (tmp, "width", G_TYPE_INT, max_w, NULL);
2796 gst_structure_set (tmp, "width", GST_TYPE_INT_RANGE, min_w, max_w, NULL);
2799 gst_structure_set (tmp, "height", G_TYPE_INT, max_h, NULL);
2801 gst_structure_set (tmp, "height", GST_TYPE_INT_RANGE, min_h, max_h, NULL);
2803 gst_v4l2_object_add_aspect_ratio (v4l2object, tmp);
2805 if (!v4l2object->skip_try_fmt_probes) {
2806 /* We could consider setting interlace mode from min and max. */
2807 gst_v4l2_object_add_interlace_mode (v4l2object, tmp, max_w, max_h,
2809 /* We could consider to check colorspace for min too, in case it depends on
2810 * the size. But in this case, min and max could not be enough */
2811 gst_v4l2_object_add_colorspace (v4l2object, tmp, max_w, max_h,
2815 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
2821 gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
2822 guint32 pixelformat, gint * width, gint * height)
2824 struct v4l2_format fmt;
2825 gboolean ret = FALSE;
2826 GstVideoInterlaceMode interlace_mode;
2828 g_return_val_if_fail (width != NULL, FALSE);
2829 g_return_val_if_fail (height != NULL, FALSE);
2831 GST_LOG_OBJECT (v4l2object->dbg_obj,
2832 "getting nearest size to %dx%d with format %" GST_FOURCC_FORMAT,
2833 *width, *height, GST_FOURCC_ARGS (pixelformat));
2835 memset (&fmt, 0, sizeof (struct v4l2_format));
2837 /* get size delimiters */
2838 memset (&fmt, 0, sizeof (fmt));
2839 fmt.type = v4l2object->type;
2840 fmt.fmt.pix.width = *width;
2841 fmt.fmt.pix.height = *height;
2842 fmt.fmt.pix.pixelformat = pixelformat;
2843 fmt.fmt.pix.field = V4L2_FIELD_ANY;
2845 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) < 0)
2848 GST_LOG_OBJECT (v4l2object->dbg_obj,
2849 "got nearest size %dx%d", fmt.fmt.pix.width, fmt.fmt.pix.height);
2851 *width = fmt.fmt.pix.width;
2852 *height = fmt.fmt.pix.height;
2854 if (!gst_v4l2_object_get_interlace_mode (fmt.fmt.pix.field, &interlace_mode)) {
2855 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2856 "Unsupported field type for %" GST_FOURCC_FORMAT "@%ux%u: %u",
2857 GST_FOURCC_ARGS (pixelformat), *width, *height, fmt.fmt.pix.field);
2865 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2866 "Unable to try format: %s", g_strerror (errno));
2873 gst_v4l2_object_is_dmabuf_supported (GstV4l2Object * v4l2object)
2875 gboolean ret = TRUE;
2876 struct v4l2_exportbuffer expbuf = {
2877 .type = v4l2object->type,
2880 .flags = O_CLOEXEC | O_RDWR,
2883 if (v4l2object->fmtdesc->flags & V4L2_FMT_FLAG_EMULATED) {
2884 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2885 "libv4l2 converter detected, disabling DMABuf");
2889 /* Expected to fail, but ENOTTY tells us that it is not implemented. */
2890 v4l2object->ioctl (v4l2object->video_fd, VIDIOC_EXPBUF, &expbuf);
2891 if (errno == ENOTTY)
2898 gst_v4l2_object_setup_pool (GstV4l2Object * v4l2object, GstCaps * caps)
2902 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "initializing the %s system",
2903 V4L2_TYPE_IS_OUTPUT (v4l2object->type) ? "output" : "capture");
2905 GST_V4L2_CHECK_OPEN (v4l2object);
2906 GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
2908 /* find transport */
2909 mode = v4l2object->req_mode;
2911 if (v4l2object->device_caps & V4L2_CAP_READWRITE) {
2912 if (v4l2object->req_mode == GST_V4L2_IO_AUTO)
2913 mode = GST_V4L2_IO_RW;
2914 } else if (v4l2object->req_mode == GST_V4L2_IO_RW)
2915 goto method_not_supported;
2917 if (v4l2object->device_caps & V4L2_CAP_STREAMING) {
2918 if (v4l2object->req_mode == GST_V4L2_IO_AUTO) {
2919 if (!V4L2_TYPE_IS_OUTPUT (v4l2object->type) &&
2920 gst_v4l2_object_is_dmabuf_supported (v4l2object)) {
2921 mode = GST_V4L2_IO_DMABUF;
2923 mode = GST_V4L2_IO_MMAP;
2926 } else if (v4l2object->req_mode == GST_V4L2_IO_MMAP ||
2927 v4l2object->req_mode == GST_V4L2_IO_DMABUF)
2928 goto method_not_supported;
2930 /* if still no transport selected, error out */
2931 if (mode == GST_V4L2_IO_AUTO)
2932 goto no_supported_capture_method;
2934 GST_INFO_OBJECT (v4l2object->dbg_obj, "accessing buffers via mode %d", mode);
2935 v4l2object->mode = mode;
2937 /* If min_buffers is not set, the driver either does not support the control or
2938 it has not been asked yet via propose_allocation/decide_allocation. */
2939 if (!v4l2object->min_buffers)
2940 gst_v4l2_get_driver_min_buffers (v4l2object);
2942 /* Map the buffers */
2943 GST_LOG_OBJECT (v4l2object->dbg_obj, "initiating buffer pool");
2945 if (!(v4l2object->pool = gst_v4l2_buffer_pool_new (v4l2object, caps)))
2946 goto buffer_pool_new_failed;
2948 GST_V4L2_SET_ACTIVE (v4l2object);
2953 buffer_pool_new_failed:
2955 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
2956 (_("Could not map buffers from device '%s'"),
2957 v4l2object->videodev),
2958 ("Failed to create buffer pool: %s", g_strerror (errno)));
2961 method_not_supported:
2963 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
2964 (_("The driver of device '%s' does not support the IO method %d"),
2965 v4l2object->videodev, mode), (NULL));
2968 no_supported_capture_method:
2970 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
2971 (_("The driver of device '%s' does not support any known IO "
2972 "method."), v4l2object->videodev), (NULL));
2978 gst_v4l2_object_set_stride (GstVideoInfo * info, GstVideoAlignment * align,
2979 gint plane, gint stride)
2981 const GstVideoFormatInfo *finfo = info->finfo;
2983 if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
2984 gint x_tiles, y_tiles, ws, hs, tile_height, padded_height;
2987 ws = GST_VIDEO_FORMAT_INFO_TILE_WS (finfo);
2988 hs = GST_VIDEO_FORMAT_INFO_TILE_HS (finfo);
2989 tile_height = 1 << hs;
2991 padded_height = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, plane,
2992 info->height + align->padding_top + align->padding_bottom);
2993 padded_height = GST_ROUND_UP_N (padded_height, tile_height);
2995 x_tiles = stride >> ws;
2996 y_tiles = padded_height >> hs;
2997 info->stride[plane] = GST_VIDEO_TILE_MAKE_STRIDE (x_tiles, y_tiles);
2999 info->stride[plane] = stride;
3004 gst_v4l2_object_extrapolate_info (GstV4l2Object * v4l2object,
3005 GstVideoInfo * info, GstVideoAlignment * align, gint stride)
3007 const GstVideoFormatInfo *finfo = info->finfo;
3008 gint i, estride, padded_height;
3011 g_return_if_fail (v4l2object->n_v4l2_planes == 1);
3013 padded_height = info->height + align->padding_top + align->padding_bottom;
3015 for (i = 0; i < finfo->n_planes; i++) {
3016 estride = gst_v4l2_object_extrapolate_stride (finfo, i, stride);
3018 gst_v4l2_object_set_stride (info, align, i, estride);
3020 info->offset[i] = offs;
3022 GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, i, padded_height);
3024 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
3025 "Extrapolated for plane %d with base stride %d: "
3026 "stride %d, offset %" G_GSIZE_FORMAT, i, stride, info->stride[i],
3030 /* Update the image size according the amount of data we are going to
3031 * read/write. This workaround bugs in driver where the sizeimage provided
3032 * by TRY/S_FMT represent the buffer length (maximum size) rather then the expected
3033 * bytesused (buffer size). */
3034 if (offs < info->size)
3039 gst_v4l2_object_save_format (GstV4l2Object * v4l2object,
3040 struct v4l2_fmtdesc *fmtdesc, struct v4l2_format *format,
3041 GstVideoInfo * info, GstVideoAlignment * align)
3043 const GstVideoFormatInfo *finfo = info->finfo;
3044 gboolean standard_stride = TRUE;
3045 gint stride, pstride, padded_width, padded_height, i;
3047 if (GST_VIDEO_INFO_FORMAT (info) == GST_VIDEO_FORMAT_ENCODED) {
3048 v4l2object->n_v4l2_planes = 1;
3049 info->size = format->fmt.pix.sizeimage;
3053 /* adjust right padding */
3054 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
3055 stride = format->fmt.pix_mp.plane_fmt[0].bytesperline;
3057 stride = format->fmt.pix.bytesperline;
3059 pstride = GST_VIDEO_FORMAT_INFO_PSTRIDE (finfo, 0);
3061 padded_width = stride / pstride;
3063 /* pstride can be 0 for complex formats */
3064 GST_WARNING_OBJECT (v4l2object->element,
3065 "format %s has a pstride of 0, cannot compute padded with",
3066 gst_video_format_to_string (GST_VIDEO_INFO_FORMAT (info)));
3067 padded_width = stride;
3070 if (padded_width < format->fmt.pix.width)
3071 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3072 "Driver bug detected, stride (%d) is too small for the width (%d)",
3073 padded_width, format->fmt.pix.width);
3075 align->padding_right = padded_width - info->width - align->padding_left;
3077 /* adjust bottom padding */
3078 padded_height = format->fmt.pix.height;
3080 if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
3081 guint hs, tile_height;
3083 hs = GST_VIDEO_FORMAT_INFO_TILE_HS (finfo);
3084 tile_height = 1 << hs;
3086 padded_height = GST_ROUND_UP_N (padded_height, tile_height);
3089 align->padding_bottom = padded_height - info->height - align->padding_top;
3091 /* setup the strides and offset */
3092 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type)) {
3093 struct v4l2_pix_format_mplane *pix_mp = &format->fmt.pix_mp;
3095 /* figure out the frame layout */
3096 v4l2object->n_v4l2_planes = MAX (1, pix_mp->num_planes);
3098 for (i = 0; i < v4l2object->n_v4l2_planes; i++) {
3099 stride = pix_mp->plane_fmt[i].bytesperline;
3101 if (info->stride[i] != stride)
3102 standard_stride = FALSE;
3104 gst_v4l2_object_set_stride (info, align, i, stride);
3105 info->offset[i] = info->size;
3106 info->size += pix_mp->plane_fmt[i].sizeimage;
3109 /* Extrapolate stride if planar format are being set in 1 v4l2 plane */
3110 if (v4l2object->n_v4l2_planes < finfo->n_planes) {
3111 stride = format->fmt.pix_mp.plane_fmt[0].bytesperline;
3112 gst_v4l2_object_extrapolate_info (v4l2object, info, align, stride);
3115 /* only one plane in non-MPLANE mode */
3116 v4l2object->n_v4l2_planes = 1;
3117 info->size = format->fmt.pix.sizeimage;
3118 stride = format->fmt.pix.bytesperline;
3120 if (info->stride[0] != stride)
3121 standard_stride = FALSE;
3123 gst_v4l2_object_extrapolate_info (v4l2object, info, align, stride);
3126 /* adjust the offset to take into account left and top */
3127 if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
3128 if ((align->padding_left + align->padding_top) > 0)
3129 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3130 "Left and top padding is not permitted for tiled formats");
3132 for (i = 0; i < finfo->n_planes; i++) {
3135 /* FIXME we assume plane as component as this is true for all supported
3136 * format we support. */
3138 hedge = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, i, align->padding_left);
3139 vedge = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, i, align->padding_top);
3141 info->offset[i] += (vedge * info->stride[i]) +
3142 (hedge * GST_VIDEO_INFO_COMP_PSTRIDE (info, i));
3147 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got sizeimage %" G_GSIZE_FORMAT,
3150 /* to avoid copies we need video meta if there is padding */
3151 v4l2object->need_video_meta =
3152 ((align->padding_top + align->padding_left + align->padding_right +
3153 align->padding_bottom) != 0);
3155 /* ... or if stride is non "standard" */
3156 if (!standard_stride)
3157 v4l2object->need_video_meta = TRUE;
3159 /* ... or also video meta if we use multiple, non-contiguous, planes */
3160 if (v4l2object->n_v4l2_planes > 1)
3161 v4l2object->need_video_meta = TRUE;
3163 v4l2object->info = *info;
3164 v4l2object->align = *align;
3165 v4l2object->format = *format;
3166 v4l2object->fmtdesc = fmtdesc;
3168 /* if we have a framerate pre-calculate duration */
3169 if (info->fps_n > 0 && info->fps_d > 0) {
3170 v4l2object->duration = gst_util_uint64_scale_int (GST_SECOND, info->fps_d,
3173 v4l2object->duration = GST_CLOCK_TIME_NONE;
3178 gst_v4l2_object_extrapolate_stride (const GstVideoFormatInfo * finfo,
3179 gint plane, gint stride)
3183 switch (finfo->format) {
3184 case GST_VIDEO_FORMAT_NV12:
3185 case GST_VIDEO_FORMAT_NV12_64Z32:
3186 case GST_VIDEO_FORMAT_NV21:
3187 case GST_VIDEO_FORMAT_NV16:
3188 case GST_VIDEO_FORMAT_NV61:
3189 case GST_VIDEO_FORMAT_NV24:
3190 estride = (plane == 0 ? 1 : 2) *
3191 GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, plane, stride);
3194 estride = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, plane, stride);
3202 gst_v4l2_video_colorimetry_matches (const GstVideoColorimetry * cinfo,
3203 const gchar * color)
3205 GstVideoColorimetry ci;
3206 static const GstVideoColorimetry ci_likely_jpeg = {
3207 GST_VIDEO_COLOR_RANGE_0_255, GST_VIDEO_COLOR_MATRIX_BT601,
3208 GST_VIDEO_TRANSFER_UNKNOWN, GST_VIDEO_COLOR_PRIMARIES_UNKNOWN };
3209 static const GstVideoColorimetry ci_jpeg = {
3210 GST_VIDEO_COLOR_RANGE_0_255, GST_VIDEO_COLOR_MATRIX_BT601,
3211 GST_VIDEO_TRANSFER_SRGB, GST_VIDEO_COLOR_PRIMARIES_BT709 };
3213 if (!gst_video_colorimetry_from_string (&ci, color))
3216 if (gst_video_colorimetry_is_equal (&ci, cinfo))
3219 /* Allow 1:4:0:0 (produced by jpegdec) if the device expects 1:4:7:1 */
3220 if (gst_video_colorimetry_is_equal (&ci, &ci_likely_jpeg)
3221 && gst_video_colorimetry_is_equal (cinfo, &ci_jpeg))
3228 gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
3229 gboolean try_only, GstV4l2Error * error)
3231 gint fd = v4l2object->video_fd;
3232 struct v4l2_format format;
3233 struct v4l2_streamparm streamparm;
3234 enum v4l2_field field;
3235 guint32 pixelformat;
3236 struct v4l2_fmtdesc *fmtdesc;
3238 GstVideoAlignment align;
3239 gint width, height, fps_n, fps_d;
3243 enum v4l2_colorspace colorspace = 0;
3244 enum v4l2_quantization range = 0;
3245 enum v4l2_ycbcr_encoding matrix = 0;
3246 enum v4l2_xfer_func transfer = 0;
3249 g_return_val_if_fail (!v4l2object->skip_try_fmt_probes ||
3250 gst_caps_is_writable (caps), FALSE);
3252 GST_V4L2_CHECK_OPEN (v4l2object);
3254 GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
3256 is_mplane = V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type);
3258 gst_video_info_init (&info);
3259 gst_video_alignment_reset (&align);
3261 if (!gst_v4l2_object_get_caps_info (v4l2object, caps, &fmtdesc, &info))
3264 pixelformat = fmtdesc->pixelformat;
3265 width = GST_VIDEO_INFO_WIDTH (&info);
3266 height = GST_VIDEO_INFO_HEIGHT (&info);
3267 fps_n = GST_VIDEO_INFO_FPS_N (&info);
3268 fps_d = GST_VIDEO_INFO_FPS_D (&info);
3270 /* if encoded format (GST_VIDEO_INFO_N_PLANES return 0)
3271 * or if contiguous is prefered */
3272 n_v4l_planes = GST_VIDEO_INFO_N_PLANES (&info);
3273 if (!n_v4l_planes || !v4l2object->prefered_non_contiguous)
3276 if (GST_VIDEO_INFO_IS_INTERLACED (&info)) {
3277 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "interlaced video");
3278 /* ideally we would differentiate between types of interlaced video
3279 * but there is not sufficient information in the caps..
3281 field = V4L2_FIELD_INTERLACED;
3283 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "progressive video");
3284 field = V4L2_FIELD_NONE;
3287 /* We first pick the main colorspace from the primaries */
3288 switch (info.colorimetry.primaries) {
3289 case GST_VIDEO_COLOR_PRIMARIES_BT709:
3290 /* There is two colorspaces using these primaries, use the range to
3292 if (info.colorimetry.range == GST_VIDEO_COLOR_RANGE_16_235)
3293 colorspace = V4L2_COLORSPACE_REC709;
3295 colorspace = V4L2_COLORSPACE_SRGB;
3297 case GST_VIDEO_COLOR_PRIMARIES_BT2020:
3298 colorspace = V4L2_COLORSPACE_BT2020;
3300 case GST_VIDEO_COLOR_PRIMARIES_BT470M:
3301 colorspace = V4L2_COLORSPACE_470_SYSTEM_M;
3303 case GST_VIDEO_COLOR_PRIMARIES_BT470BG:
3304 colorspace = V4L2_COLORSPACE_470_SYSTEM_BG;
3306 case GST_VIDEO_COLOR_PRIMARIES_SMPTE170M:
3307 colorspace = V4L2_COLORSPACE_SMPTE170M;
3309 case GST_VIDEO_COLOR_PRIMARIES_SMPTE240M:
3310 colorspace = V4L2_COLORSPACE_SMPTE240M;
3313 case GST_VIDEO_COLOR_PRIMARIES_FILM:
3314 case GST_VIDEO_COLOR_PRIMARIES_UNKNOWN:
3315 /* We don't know, we will guess */
3319 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3320 "Unknown colorimetry primaries %d", info.colorimetry.primaries);
3324 switch (info.colorimetry.range) {
3325 case GST_VIDEO_COLOR_RANGE_0_255:
3326 range = V4L2_QUANTIZATION_FULL_RANGE;
3328 case GST_VIDEO_COLOR_RANGE_16_235:
3329 range = V4L2_QUANTIZATION_LIM_RANGE;
3331 case GST_VIDEO_COLOR_RANGE_UNKNOWN:
3332 /* We let the driver pick a default one */
3335 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3336 "Unknown colorimetry range %d", info.colorimetry.range);
3340 switch (info.colorimetry.matrix) {
3341 case GST_VIDEO_COLOR_MATRIX_RGB:
3342 /* Unspecified, leave to default */
3344 /* FCC is about the same as BT601 with less digit */
3345 case GST_VIDEO_COLOR_MATRIX_FCC:
3346 case GST_VIDEO_COLOR_MATRIX_BT601:
3347 matrix = V4L2_YCBCR_ENC_601;
3349 case GST_VIDEO_COLOR_MATRIX_BT709:
3350 matrix = V4L2_YCBCR_ENC_709;
3352 case GST_VIDEO_COLOR_MATRIX_SMPTE240M:
3353 matrix = V4L2_YCBCR_ENC_SMPTE240M;
3355 case GST_VIDEO_COLOR_MATRIX_BT2020:
3356 matrix = V4L2_YCBCR_ENC_BT2020;
3358 case GST_VIDEO_COLOR_MATRIX_UNKNOWN:
3359 /* We let the driver pick a default one */
3362 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3363 "Unknown colorimetry matrix %d", info.colorimetry.matrix);
3367 switch (info.colorimetry.transfer) {
3368 case GST_VIDEO_TRANSFER_GAMMA18:
3369 case GST_VIDEO_TRANSFER_GAMMA20:
3370 case GST_VIDEO_TRANSFER_GAMMA22:
3371 case GST_VIDEO_TRANSFER_GAMMA28:
3372 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3373 "GAMMA 18, 20, 22, 28 transfer functions not supported");
3375 case GST_VIDEO_TRANSFER_GAMMA10:
3376 transfer = V4L2_XFER_FUNC_NONE;
3378 case GST_VIDEO_TRANSFER_BT2020_12:
3379 case GST_VIDEO_TRANSFER_BT709:
3380 transfer = V4L2_XFER_FUNC_709;
3382 case GST_VIDEO_TRANSFER_SMPTE240M:
3383 transfer = V4L2_XFER_FUNC_SMPTE240M;
3385 case GST_VIDEO_TRANSFER_SRGB:
3386 transfer = V4L2_XFER_FUNC_SRGB;
3388 case GST_VIDEO_TRANSFER_LOG100:
3389 case GST_VIDEO_TRANSFER_LOG316:
3390 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3391 "LOG 100, 316 transfer functions not supported");
3392 /* FIXME No known sensible default, maybe AdobeRGB ? */
3394 case GST_VIDEO_TRANSFER_UNKNOWN:
3395 /* We let the driver pick a default one */
3398 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3399 "Unknown colorimetry tranfer %d", info.colorimetry.transfer);
3403 if (colorspace == 0) {
3404 /* Try to guess colorspace according to pixelformat and size */
3405 if (GST_VIDEO_INFO_IS_YUV (&info)) {
3406 if (range == V4L2_QUANTIZATION_FULL_RANGE
3407 && matrix == V4L2_YCBCR_ENC_601 && transfer == 0) {
3408 /* Full range BT.601 YCbCr encoding with unknown primaries and transfer
3409 * function most likely is JPEG */
3410 colorspace = V4L2_COLORSPACE_JPEG;
3411 transfer = V4L2_XFER_FUNC_SRGB;
3413 /* SD streams likely use SMPTE170M and HD streams REC709 */
3414 if (width <= 720 && height <= 576)
3415 colorspace = V4L2_COLORSPACE_SMPTE170M;
3417 colorspace = V4L2_COLORSPACE_REC709;
3419 } else if (GST_VIDEO_INFO_IS_RGB (&info)) {
3420 colorspace = V4L2_COLORSPACE_SRGB;
3421 transfer = V4L2_XFER_FUNC_NONE;
3425 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired format %dx%d, format "
3426 "%" GST_FOURCC_FORMAT " stride: %d", width, height,
3427 GST_FOURCC_ARGS (pixelformat), GST_VIDEO_INFO_PLANE_STRIDE (&info, 0));
3429 memset (&format, 0x00, sizeof (struct v4l2_format));
3430 format.type = v4l2object->type;
3433 format.type = v4l2object->type;
3434 format.fmt.pix_mp.pixelformat = pixelformat;
3435 format.fmt.pix_mp.width = width;
3436 format.fmt.pix_mp.height = height;
3437 format.fmt.pix_mp.field = field;
3438 format.fmt.pix_mp.num_planes = n_v4l_planes;
3440 /* try to ask our prefered stride but it's not a failure if not
3442 for (i = 0; i < n_v4l_planes; i++) {
3443 gint stride = GST_VIDEO_INFO_PLANE_STRIDE (&info, i);
3445 if (GST_VIDEO_FORMAT_INFO_IS_TILED (info.finfo))
3446 stride = GST_VIDEO_TILE_X_TILES (stride) <<
3447 GST_VIDEO_FORMAT_INFO_TILE_WS (info.finfo);
3449 format.fmt.pix_mp.plane_fmt[i].bytesperline = stride;
3452 if (GST_VIDEO_INFO_FORMAT (&info) == GST_VIDEO_FORMAT_ENCODED)
3453 format.fmt.pix_mp.plane_fmt[0].sizeimage = ENCODED_BUFFER_SIZE;
3455 gint stride = GST_VIDEO_INFO_PLANE_STRIDE (&info, 0);
3457 format.type = v4l2object->type;
3459 format.fmt.pix.width = width;
3460 format.fmt.pix.height = height;
3461 format.fmt.pix.pixelformat = pixelformat;
3462 format.fmt.pix.field = field;
3464 if (GST_VIDEO_FORMAT_INFO_IS_TILED (info.finfo))
3465 stride = GST_VIDEO_TILE_X_TILES (stride) <<
3466 GST_VIDEO_FORMAT_INFO_TILE_WS (info.finfo);
3468 /* try to ask our prefered stride */
3469 format.fmt.pix.bytesperline = stride;
3471 if (GST_VIDEO_INFO_FORMAT (&info) == GST_VIDEO_FORMAT_ENCODED)
3472 format.fmt.pix.sizeimage = ENCODED_BUFFER_SIZE;
3475 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired format is %dx%d, format "
3476 "%" GST_FOURCC_FORMAT ", nb planes %d", format.fmt.pix.width,
3477 format.fmt.pix_mp.height,
3478 GST_FOURCC_ARGS (format.fmt.pix.pixelformat),
3479 is_mplane ? format.fmt.pix_mp.num_planes : 1);
3481 #ifndef GST_DISABLE_GST_DEBUG
3483 for (i = 0; i < format.fmt.pix_mp.num_planes; i++)
3484 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d",
3485 format.fmt.pix_mp.plane_fmt[i].bytesperline);
3487 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d",
3488 format.fmt.pix.bytesperline);
3493 format.fmt.pix_mp.colorspace = colorspace;
3494 format.fmt.pix_mp.quantization = range;
3495 format.fmt.pix_mp.ycbcr_enc = matrix;
3496 format.fmt.pix_mp.xfer_func = transfer;
3498 format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
3499 format.fmt.pix.colorspace = colorspace;
3500 format.fmt.pix.quantization = range;
3501 format.fmt.pix.ycbcr_enc = matrix;
3502 format.fmt.pix.xfer_func = transfer;
3505 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired colorspace is %d:%d:%d:%d",
3506 colorspace, range, matrix, transfer);
3509 if (v4l2object->ioctl (fd, VIDIOC_TRY_FMT, &format) < 0)
3510 goto try_fmt_failed;
3512 if (v4l2object->ioctl (fd, VIDIOC_S_FMT, &format) < 0)
3513 goto set_fmt_failed;
3517 colorspace = format.fmt.pix_mp.colorspace;
3518 range = format.fmt.pix_mp.quantization;
3519 matrix = format.fmt.pix_mp.ycbcr_enc;
3520 transfer = format.fmt.pix_mp.xfer_func;
3522 colorspace = format.fmt.pix.colorspace;
3523 range = format.fmt.pix.quantization;
3524 matrix = format.fmt.pix.ycbcr_enc;
3525 transfer = format.fmt.pix.xfer_func;
3528 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got format of %dx%d, format "
3529 "%" GST_FOURCC_FORMAT ", nb planes %d, colorspace %d:%d:%d:%d",
3530 format.fmt.pix.width, format.fmt.pix_mp.height,
3531 GST_FOURCC_ARGS (format.fmt.pix.pixelformat),
3532 is_mplane ? format.fmt.pix_mp.num_planes : 1,
3533 colorspace, range, matrix, transfer);
3535 #ifndef GST_DISABLE_GST_DEBUG
3537 for (i = 0; i < format.fmt.pix_mp.num_planes; i++)
3538 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d, sizeimage %d",
3539 format.fmt.pix_mp.plane_fmt[i].bytesperline,
3540 format.fmt.pix_mp.plane_fmt[i].sizeimage);
3542 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d, sizeimage %d",
3543 format.fmt.pix.bytesperline, format.fmt.pix.sizeimage);
3547 if (format.fmt.pix.pixelformat != pixelformat)
3548 goto invalid_pixelformat;
3550 /* Only negotiate size with raw data.
3551 * For some codecs the dimensions are *not* in the bitstream, IIRC VC1
3552 * in ASF mode for example, there is also not reason for a driver to
3553 * change the size. */
3554 if (info.finfo->format != GST_VIDEO_FORMAT_ENCODED) {
3555 /* We can crop larger images */
3556 if (format.fmt.pix.width < width || format.fmt.pix.height < height)
3557 goto invalid_dimensions;
3559 /* Note, this will be adjusted if upstream has non-centered cropping. */
3560 align.padding_top = 0;
3561 align.padding_bottom = format.fmt.pix.height - height;
3562 align.padding_left = 0;
3563 align.padding_right = format.fmt.pix.width - width;
3566 if (is_mplane && format.fmt.pix_mp.num_planes != n_v4l_planes)
3567 goto invalid_planes;
3569 if ((is_mplane && format.fmt.pix_mp.field != field)
3570 || format.fmt.pix.field != field)
3573 gst_v4l2_object_get_colorspace (&format, &info.colorimetry);
3575 s = gst_caps_get_structure (caps, 0);
3576 if (gst_structure_has_field (s, "colorimetry")) {
3577 if (!gst_v4l2_video_colorimetry_matches (&info.colorimetry,
3578 gst_structure_get_string (s, "colorimetry")))
3579 goto invalid_colorimetry;
3582 /* In case we have skipped the try_fmt probes, we'll need to set the
3583 * colorimetry and interlace-mode back into the caps. */
3584 if (v4l2object->skip_try_fmt_probes) {
3585 if (!gst_structure_has_field (s, "colorimetry")) {
3586 gchar *str = gst_video_colorimetry_to_string (&info.colorimetry);
3587 gst_structure_set (s, "colorimetry", G_TYPE_STRING, str, NULL);
3591 if (!gst_structure_has_field (s, "interlace-mode"))
3592 gst_structure_set (s, "interlace-mode", G_TYPE_STRING,
3593 gst_video_interlace_mode_to_string (info.interlace_mode), NULL);
3596 if (try_only) /* good enough for trying only */
3599 if (GST_VIDEO_INFO_HAS_ALPHA (&info)) {
3600 struct v4l2_control ctl = { 0, };
3601 ctl.id = V4L2_CID_ALPHA_COMPONENT;
3604 if (v4l2object->ioctl (fd, VIDIOC_S_CTRL, &ctl) < 0)
3605 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3606 "Failed to set alpha component value");
3609 /* Is there a reason we require the caller to always specify a framerate? */
3610 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired framerate: %u/%u", fps_n,
3613 memset (&streamparm, 0x00, sizeof (struct v4l2_streamparm));
3614 streamparm.type = v4l2object->type;
3616 if (v4l2object->ioctl (fd, VIDIOC_G_PARM, &streamparm) < 0)
3617 goto get_parm_failed;
3619 if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE
3620 || v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
3621 GST_VIDEO_INFO_FPS_N (&info) =
3622 streamparm.parm.capture.timeperframe.denominator;
3623 GST_VIDEO_INFO_FPS_D (&info) =
3624 streamparm.parm.capture.timeperframe.numerator;
3626 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got capture framerate: %u/%u",
3627 streamparm.parm.capture.timeperframe.denominator,
3628 streamparm.parm.capture.timeperframe.numerator);
3630 /* We used to skip frame rate setup if the camera was already setup
3631 * with the requested frame rate. This breaks some cameras though,
3632 * causing them to not output data (several models of Thinkpad cameras
3633 * have this problem at least).
3634 * So, don't skip. */
3635 GST_LOG_OBJECT (v4l2object->dbg_obj, "Setting capture framerate to %u/%u",
3637 /* We want to change the frame rate, so check whether we can. Some cheap USB
3638 * cameras don't have the capability */
3639 if ((streamparm.parm.capture.capability & V4L2_CAP_TIMEPERFRAME) == 0) {
3640 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
3641 "Not setting capture framerate (not supported)");
3645 /* Note: V4L2 wants the frame interval, we have the frame rate */
3646 streamparm.parm.capture.timeperframe.numerator = fps_d;
3647 streamparm.parm.capture.timeperframe.denominator = fps_n;
3649 /* some cheap USB cam's won't accept any change */
3650 if (v4l2object->ioctl (fd, VIDIOC_S_PARM, &streamparm) < 0)
3651 goto set_parm_failed;
3653 if (streamparm.parm.capture.timeperframe.numerator > 0 &&
3654 streamparm.parm.capture.timeperframe.denominator > 0) {
3655 /* get new values */
3656 fps_d = streamparm.parm.capture.timeperframe.numerator;
3657 fps_n = streamparm.parm.capture.timeperframe.denominator;
3659 GST_INFO_OBJECT (v4l2object->dbg_obj, "Set capture framerate to %u/%u",
3662 /* fix v4l2 capture driver to provide framerate values */
3663 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3664 "Reuse caps framerate %u/%u - fix v4l2 capture driver", fps_n, fps_d);
3667 GST_VIDEO_INFO_FPS_N (&info) = fps_n;
3668 GST_VIDEO_INFO_FPS_D (&info) = fps_d;
3669 } else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT
3670 || v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
3671 GST_VIDEO_INFO_FPS_N (&info) =
3672 streamparm.parm.output.timeperframe.denominator;
3673 GST_VIDEO_INFO_FPS_D (&info) =
3674 streamparm.parm.output.timeperframe.numerator;
3676 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got output framerate: %u/%u",
3677 streamparm.parm.output.timeperframe.denominator,
3678 streamparm.parm.output.timeperframe.numerator);
3680 GST_LOG_OBJECT (v4l2object->dbg_obj, "Setting output framerate to %u/%u",
3682 if ((streamparm.parm.output.capability & V4L2_CAP_TIMEPERFRAME) == 0) {
3683 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
3684 "Not setting output framerate (not supported)");
3688 /* Note: V4L2 wants the frame interval, we have the frame rate */
3689 streamparm.parm.output.timeperframe.numerator = fps_d;
3690 streamparm.parm.output.timeperframe.denominator = fps_n;
3692 if (v4l2object->ioctl (fd, VIDIOC_S_PARM, &streamparm) < 0)
3693 goto set_parm_failed;
3695 if (streamparm.parm.output.timeperframe.numerator > 0 &&
3696 streamparm.parm.output.timeperframe.denominator > 0) {
3697 /* get new values */
3698 fps_d = streamparm.parm.output.timeperframe.numerator;
3699 fps_n = streamparm.parm.output.timeperframe.denominator;
3701 GST_INFO_OBJECT (v4l2object->dbg_obj, "Set output framerate to %u/%u",
3704 /* fix v4l2 output driver to provide framerate values */
3705 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3706 "Reuse caps framerate %u/%u - fix v4l2 output driver", fps_n, fps_d);
3709 GST_VIDEO_INFO_FPS_N (&info) = fps_n;
3710 GST_VIDEO_INFO_FPS_D (&info) = fps_d;
3714 /* add boolean return, so we can fail on drivers bugs */
3715 gst_v4l2_object_save_format (v4l2object, fmtdesc, &format, &info, &align);
3717 /* now configure the pool */
3718 if (!gst_v4l2_object_setup_pool (v4l2object, caps))
3726 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "can't parse caps %" GST_PTR_FORMAT,
3732 if (errno == EINVAL) {
3733 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3734 (_("Device '%s' has no supported format"), v4l2object->videodev),
3735 ("Call to TRY_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
3736 GST_FOURCC_ARGS (pixelformat), width, height,
3737 g_strerror (errno)));
3739 GST_V4L2_ERROR (error, RESOURCE, FAILED,
3740 (_("Device '%s' failed during initialization"),
3741 v4l2object->videodev),
3742 ("Call to TRY_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
3743 GST_FOURCC_ARGS (pixelformat), width, height,
3744 g_strerror (errno)));
3750 if (errno == EBUSY) {
3751 GST_V4L2_ERROR (error, RESOURCE, BUSY,
3752 (_("Device '%s' is busy"), v4l2object->videodev),
3753 ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
3754 GST_FOURCC_ARGS (pixelformat), width, height,
3755 g_strerror (errno)));
3756 } else if (errno == EINVAL) {
3757 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3758 (_("Device '%s' has no supported format"), v4l2object->videodev),
3759 ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
3760 GST_FOURCC_ARGS (pixelformat), width, height,
3761 g_strerror (errno)));
3763 GST_V4L2_ERROR (error, RESOURCE, FAILED,
3764 (_("Device '%s' failed during initialization"),
3765 v4l2object->videodev),
3766 ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
3767 GST_FOURCC_ARGS (pixelformat), width, height,
3768 g_strerror (errno)));
3774 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3775 (_("Device '%s' cannot capture at %dx%d"),
3776 v4l2object->videodev, width, height),
3777 ("Tried to capture at %dx%d, but device returned size %dx%d",
3778 width, height, format.fmt.pix.width, format.fmt.pix.height));
3781 invalid_pixelformat:
3783 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3784 (_("Device '%s' cannot capture in the specified format"),
3785 v4l2object->videodev),
3786 ("Tried to capture in %" GST_FOURCC_FORMAT
3787 ", but device returned format" " %" GST_FOURCC_FORMAT,
3788 GST_FOURCC_ARGS (pixelformat),
3789 GST_FOURCC_ARGS (format.fmt.pix.pixelformat)));
3794 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3795 (_("Device '%s' does support non-contiguous planes"),
3796 v4l2object->videodev),
3797 ("Device wants %d planes", format.fmt.pix_mp.num_planes));
3802 enum v4l2_field wanted_field;
3805 wanted_field = format.fmt.pix_mp.field;
3807 wanted_field = format.fmt.pix.field;
3809 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3810 (_("Device '%s' does not support %s interlacing"),
3811 v4l2object->videodev,
3812 field == V4L2_FIELD_NONE ? "progressive" : "interleaved"),
3813 ("Device wants %s interlacing",
3814 wanted_field == V4L2_FIELD_NONE ? "progressive" : "interleaved"));
3817 invalid_colorimetry:
3819 gchar *wanted_colorimetry;
3821 wanted_colorimetry = gst_video_colorimetry_to_string (&info.colorimetry);
3823 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3824 (_("Device '%s' does not support %s colorimetry"),
3825 v4l2object->videodev, gst_structure_get_string (s, "colorimetry")),
3826 ("Device wants %s colorimetry", wanted_colorimetry));
3828 g_free (wanted_colorimetry);
3833 /* it's possible that this call is not supported */
3834 if (errno != EINVAL && errno != ENOTTY) {
3835 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3836 (_("Could not get parameters on device '%s'"),
3837 v4l2object->videodev), GST_ERROR_SYSTEM);
3843 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3844 (_("Video device did not accept new frame rate setting.")),
3850 /* setup_pool already send the error */
3856 gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps,
3857 GstV4l2Error * error)
3859 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Setting format to %" GST_PTR_FORMAT,
3861 return gst_v4l2_object_set_format_full (v4l2object, caps, FALSE, error);
3865 gst_v4l2_object_try_format (GstV4l2Object * v4l2object, GstCaps * caps,
3866 GstV4l2Error * error)
3868 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Trying format %" GST_PTR_FORMAT,
3870 return gst_v4l2_object_set_format_full (v4l2object, caps, TRUE, error);
3874 * gst_v4l2_object_acquire_format:
3875 * @v4l2object the object
3876 * @info a GstVideoInfo to be filled
3878 * Acquire the driver choosen format. This is useful in decoder or encoder elements where
3879 * the output format is choosen by the HW.
3881 * Returns: %TRUE on success, %FALSE on failure.
3884 gst_v4l2_object_acquire_format (GstV4l2Object * v4l2object, GstVideoInfo * info)
3886 struct v4l2_fmtdesc *fmtdesc;
3887 struct v4l2_format fmt;
3888 struct v4l2_crop crop;
3889 struct v4l2_selection sel;
3890 struct v4l2_rect *r = NULL;
3891 GstVideoFormat format;
3892 guint width, height;
3893 GstVideoAlignment align;
3895 gst_video_info_init (info);
3896 gst_video_alignment_reset (&align);
3898 memset (&fmt, 0x00, sizeof (struct v4l2_format));
3899 fmt.type = v4l2object->type;
3900 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_FMT, &fmt) < 0)
3901 goto get_fmt_failed;
3903 fmtdesc = gst_v4l2_object_get_format_from_fourcc (v4l2object,
3904 fmt.fmt.pix.pixelformat);
3905 if (fmtdesc == NULL)
3906 goto unsupported_format;
3908 /* No need to care about mplane, the four first params are the same */
3909 format = gst_v4l2_object_v4l2fourcc_to_video_format (fmt.fmt.pix.pixelformat);
3911 /* fails if we do no translate the fmt.pix.pixelformat to GstVideoFormat */
3912 if (format == GST_VIDEO_FORMAT_UNKNOWN)
3913 goto unsupported_format;
3915 if (fmt.fmt.pix.width == 0 || fmt.fmt.pix.height == 0)
3916 goto invalid_dimensions;
3918 width = fmt.fmt.pix.width;
3919 height = fmt.fmt.pix.height;
3921 /* Use the default compose rectangle */
3922 memset (&sel, 0, sizeof (struct v4l2_selection));
3923 sel.type = v4l2object->type;
3924 sel.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
3925 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_SELECTION, &sel) >= 0) {
3928 /* For ancient kernels, fall back to G_CROP */
3929 memset (&crop, 0, sizeof (struct v4l2_crop));
3930 crop.type = v4l2object->type;
3931 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CROP, &crop) >= 0)
3935 align.padding_left = r->left;
3936 align.padding_top = r->top;
3937 align.padding_right = width - r->width - r->left;
3938 align.padding_bottom = height - r->height - r->top;
3943 gst_video_info_set_format (info, format, width, height);
3945 switch (fmt.fmt.pix.field) {
3946 case V4L2_FIELD_ANY:
3947 case V4L2_FIELD_NONE:
3948 info->interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
3950 case V4L2_FIELD_INTERLACED:
3951 case V4L2_FIELD_INTERLACED_TB:
3952 case V4L2_FIELD_INTERLACED_BT:
3953 info->interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
3956 goto unsupported_field;
3959 gst_v4l2_object_get_colorspace (&fmt, &info->colorimetry);
3961 gst_v4l2_object_save_format (v4l2object, fmtdesc, &fmt, info, &align);
3963 /* Shall we setup the pool ? */
3969 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
3970 (_("Video device did not provide output format.")), GST_ERROR_SYSTEM);
3975 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
3976 (_("Video device returned invalid dimensions.")),
3977 ("Expected non 0 dimensions, got %dx%d", fmt.fmt.pix.width,
3978 fmt.fmt.pix.height));
3983 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
3984 (_("Video device uses an unsupported interlacing method.")),
3985 ("V4L2 field type %d not supported", fmt.fmt.pix.field));
3990 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
3991 (_("Video device uses an unsupported pixel format.")),
3992 ("V4L2 format %" GST_FOURCC_FORMAT " not supported",
3993 GST_FOURCC_ARGS (fmt.fmt.pix.pixelformat)));
3999 gst_v4l2_object_set_crop (GstV4l2Object * obj)
4001 struct v4l2_selection sel = { 0 };
4002 struct v4l2_crop crop = { 0 };
4004 sel.type = obj->type;
4005 sel.target = V4L2_SEL_TGT_CROP;
4007 sel.r.left = obj->align.padding_left;
4008 sel.r.top = obj->align.padding_top;
4009 sel.r.width = obj->info.width;
4010 sel.r.height = obj->info.height;
4012 crop.type = obj->type;
4015 if (obj->align.padding_left + obj->align.padding_top +
4016 obj->align.padding_right + obj->align.padding_bottom == 0) {
4017 GST_DEBUG_OBJECT (obj->dbg_obj, "no cropping needed");
4021 GST_DEBUG_OBJECT (obj->dbg_obj,
4022 "Desired cropping left %u, top %u, size %ux%u", crop.c.left, crop.c.top,
4023 crop.c.width, crop.c.height);
4025 if (obj->ioctl (obj->video_fd, VIDIOC_S_SELECTION, &sel) < 0) {
4026 if (errno != ENOTTY) {
4027 GST_WARNING_OBJECT (obj->dbg_obj,
4028 "Failed to set crop rectangle with VIDIOC_S_SELECTION: %s",
4029 g_strerror (errno));
4032 if (obj->ioctl (obj->video_fd, VIDIOC_S_CROP, &crop) < 0) {
4033 GST_WARNING_OBJECT (obj->dbg_obj, "VIDIOC_S_CROP failed");
4037 if (obj->ioctl (obj->video_fd, VIDIOC_G_CROP, &crop) < 0) {
4038 GST_WARNING_OBJECT (obj->dbg_obj, "VIDIOC_G_CROP failed");
4046 GST_DEBUG_OBJECT (obj->dbg_obj,
4047 "Got cropping left %u, top %u, size %ux%u", crop.c.left, crop.c.top,
4048 crop.c.width, crop.c.height);
4054 gst_v4l2_object_caps_equal (GstV4l2Object * v4l2object, GstCaps * caps)
4056 GstStructure *config;
4060 if (!v4l2object->pool)
4063 config = gst_buffer_pool_get_config (v4l2object->pool);
4064 gst_buffer_pool_config_get_params (config, &oldcaps, NULL, NULL, NULL);
4066 ret = oldcaps && gst_caps_is_equal (caps, oldcaps);
4068 gst_structure_free (config);
4074 gst_v4l2_object_caps_is_subset (GstV4l2Object * v4l2object, GstCaps * caps)
4076 GstStructure *config;
4080 if (!v4l2object->pool)
4083 config = gst_buffer_pool_get_config (v4l2object->pool);
4084 gst_buffer_pool_config_get_params (config, &oldcaps, NULL, NULL, NULL);
4086 ret = oldcaps && gst_caps_is_subset (oldcaps, caps);
4088 gst_structure_free (config);
4094 gst_v4l2_object_get_current_caps (GstV4l2Object * v4l2object)
4096 GstStructure *config;
4099 if (!v4l2object->pool)
4102 config = gst_buffer_pool_get_config (v4l2object->pool);
4103 gst_buffer_pool_config_get_params (config, &oldcaps, NULL, NULL, NULL);
4106 gst_caps_ref (oldcaps);
4108 gst_structure_free (config);
4114 gst_v4l2_object_unlock (GstV4l2Object * v4l2object)
4116 gboolean ret = TRUE;
4118 GST_LOG_OBJECT (v4l2object->dbg_obj, "start flushing");
4120 if (v4l2object->pool && gst_buffer_pool_is_active (v4l2object->pool))
4121 gst_buffer_pool_set_flushing (v4l2object->pool, TRUE);
4127 gst_v4l2_object_unlock_stop (GstV4l2Object * v4l2object)
4129 gboolean ret = TRUE;
4131 GST_LOG_OBJECT (v4l2object->dbg_obj, "stop flushing");
4133 if (v4l2object->pool && gst_buffer_pool_is_active (v4l2object->pool))
4134 gst_buffer_pool_set_flushing (v4l2object->pool, FALSE);
4140 gst_v4l2_object_stop (GstV4l2Object * v4l2object)
4142 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "stopping");
4144 if (!GST_V4L2_IS_OPEN (v4l2object))
4146 if (!GST_V4L2_IS_ACTIVE (v4l2object))
4149 if (v4l2object->pool) {
4150 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "deactivating pool");
4151 gst_buffer_pool_set_active (v4l2object->pool, FALSE);
4152 gst_object_unref (v4l2object->pool);
4153 v4l2object->pool = NULL;
4156 GST_V4L2_SET_INACTIVE (v4l2object);
4163 gst_v4l2_object_probe_caps (GstV4l2Object * v4l2object, GstCaps * filter)
4169 formats = gst_v4l2_object_get_format_list (v4l2object);
4171 ret = gst_caps_new_empty ();
4173 if (v4l2object->keep_aspect && !v4l2object->par) {
4174 struct v4l2_cropcap cropcap;
4176 memset (&cropcap, 0, sizeof (cropcap));
4178 cropcap.type = v4l2object->type;
4179 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_CROPCAP, &cropcap) < 0) {
4180 if (errno != ENOTTY)
4181 GST_WARNING_OBJECT (v4l2object->dbg_obj,
4182 "Failed to probe pixel aspect ratio with VIDIOC_CROPCAP: %s",
4183 g_strerror (errno));
4185 v4l2object->par = g_new0 (GValue, 1);
4186 g_value_init (v4l2object->par, GST_TYPE_FRACTION);
4187 gst_value_set_fraction (v4l2object->par, cropcap.pixelaspect.numerator,
4188 cropcap.pixelaspect.denominator);
4192 for (walk = formats; walk; walk = walk->next) {
4193 struct v4l2_fmtdesc *format;
4194 GstStructure *template;
4197 format = (struct v4l2_fmtdesc *) walk->data;
4199 template = gst_v4l2_object_v4l2fourcc_to_bare_struct (format->pixelformat);
4202 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
4203 "unknown format %" GST_FOURCC_FORMAT,
4204 GST_FOURCC_ARGS (format->pixelformat));
4208 /* If we have a filter, check if we need to probe this format or not */
4210 GstCaps *format_caps = gst_caps_new_empty ();
4212 gst_caps_append_structure (format_caps, gst_structure_copy (template));
4214 if (!gst_caps_can_intersect (format_caps, filter)) {
4215 gst_caps_unref (format_caps);
4216 gst_structure_free (template);
4220 gst_caps_unref (format_caps);
4223 tmp = gst_v4l2_object_probe_caps_for_format (v4l2object,
4224 format->pixelformat, template);
4226 gst_caps_append (ret, tmp);
4228 gst_structure_free (template);
4235 ret = gst_caps_intersect_full (filter, ret, GST_CAPS_INTERSECT_FIRST);
4236 gst_caps_unref (tmp);
4239 GST_INFO_OBJECT (v4l2object->dbg_obj, "probed caps: %" GST_PTR_FORMAT, ret);
4245 gst_v4l2_object_get_caps (GstV4l2Object * v4l2object, GstCaps * filter)
4249 if (v4l2object->probed_caps == NULL)
4250 v4l2object->probed_caps = gst_v4l2_object_probe_caps (v4l2object, NULL);
4253 ret = gst_caps_intersect_full (filter, v4l2object->probed_caps,
4254 GST_CAPS_INTERSECT_FIRST);
4256 ret = gst_caps_ref (v4l2object->probed_caps);
4263 gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
4266 GstBufferPool *pool = NULL, *other_pool = NULL;
4267 GstStructure *config;
4268 guint size, min, max, own_min = 0;
4270 gboolean has_video_meta;
4271 gboolean can_share_own_pool, pushing_from_our_pool = FALSE;
4272 GstAllocator *allocator = NULL;
4273 GstAllocationParams params = { 0 };
4275 GST_DEBUG_OBJECT (obj->dbg_obj, "decide allocation");
4277 g_return_val_if_fail (obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
4278 obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE, FALSE);
4280 gst_query_parse_allocation (query, &caps, NULL);
4282 if (obj->pool == NULL) {
4283 if (!gst_v4l2_object_setup_pool (obj, caps))
4287 if (gst_query_get_n_allocation_params (query) > 0)
4288 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
4290 if (gst_query_get_n_allocation_pools (query) > 0) {
4291 gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
4300 GST_DEBUG_OBJECT (obj->dbg_obj, "allocation: size:%u min:%u max:%u pool:%"
4301 GST_PTR_FORMAT, size, min, max, pool);
4304 gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
4306 can_share_own_pool = (has_video_meta || !obj->need_video_meta);
4308 gst_v4l2_get_driver_min_buffers (obj);
4309 /* We can't share our own pool, if it exceed V4L2 capacity */
4310 if (min + obj->min_buffers + 1 > VIDEO_MAX_FRAME)
4311 can_share_own_pool = FALSE;
4314 switch (obj->mode) {
4315 case GST_V4L2_IO_RW:
4317 /* in READ/WRITE mode, prefer a downstream pool because our own pool
4318 * doesn't help much, we have to write to it as well */
4319 GST_DEBUG_OBJECT (obj->dbg_obj,
4320 "read/write mode: using downstream pool");
4321 /* use the bigest size, when we use our own pool we can't really do any
4322 * other size than what the hardware gives us but for downstream pools
4324 size = MAX (size, obj->info.size);
4325 } else if (can_share_own_pool) {
4326 /* no downstream pool, use our own then */
4327 GST_DEBUG_OBJECT (obj->dbg_obj,
4328 "read/write mode: no downstream pool, using our own");
4329 pool = gst_object_ref (obj->pool);
4330 size = obj->info.size;
4331 pushing_from_our_pool = TRUE;
4335 case GST_V4L2_IO_USERPTR:
4336 case GST_V4L2_IO_DMABUF_IMPORT:
4337 /* in importing mode, prefer our own pool, and pass the other pool to
4338 * our own, so it can serve itself */
4340 goto no_downstream_pool;
4341 gst_v4l2_buffer_pool_set_other_pool (GST_V4L2_BUFFER_POOL (obj->pool),
4344 gst_object_unref (pool);
4345 pool = gst_object_ref (obj->pool);
4346 size = obj->info.size;
4349 case GST_V4L2_IO_MMAP:
4350 case GST_V4L2_IO_DMABUF:
4351 /* in streaming mode, prefer our own pool */
4352 /* Check if we can use it ... */
4353 if (can_share_own_pool) {
4355 gst_object_unref (pool);
4356 pool = gst_object_ref (obj->pool);
4357 size = obj->info.size;
4358 GST_DEBUG_OBJECT (obj->dbg_obj,
4359 "streaming mode: using our own pool %" GST_PTR_FORMAT, pool);
4360 pushing_from_our_pool = TRUE;
4362 GST_DEBUG_OBJECT (obj->dbg_obj,
4363 "streaming mode: copying to downstream pool %" GST_PTR_FORMAT,
4366 GST_DEBUG_OBJECT (obj->dbg_obj,
4367 "streaming mode: no usable pool, copying to generic pool");
4368 size = MAX (size, obj->info.size);
4371 case GST_V4L2_IO_AUTO:
4373 GST_WARNING_OBJECT (obj->dbg_obj, "unhandled mode");
4380 /* If pushing from our own pool, configure it with queried minimum,
4381 * otherwise use the minimum required */
4382 if (pushing_from_our_pool) {
4383 /* When pushing from our own pool, we need what downstream one, to be able
4384 * to fill the pipeline, the minimum required to decoder according to the
4385 * driver and 2 more, so we don't endup up with everything downstream or
4386 * held by the decoder. We account 2 buffers for v4l2 so when one is being
4387 * pushed downstream the other one can already be queued for the next
4389 own_min = min + obj->min_buffers + 2;
4391 /* If no allocation parameters where provided, allow for a little more
4392 * buffers and enable copy threshold */
4395 gst_v4l2_buffer_pool_copy_at_threshold (GST_V4L2_BUFFER_POOL (pool),
4398 gst_v4l2_buffer_pool_copy_at_threshold (GST_V4L2_BUFFER_POOL (pool),
4403 /* In this case we'll have to configure two buffer pool. For our buffer
4404 * pool, we'll need what the driver one, and one more, so we can dequeu */
4405 own_min = obj->min_buffers + 1;
4406 own_min = MAX (own_min, GST_V4L2_MIN_BUFFERS);
4408 /* for the downstream pool, we keep what downstream wants, though ensure
4409 * at least a minimum if downstream didn't suggest anything (we are
4410 * expecting the base class to create a default one for the context) */
4411 min = MAX (min, GST_V4L2_MIN_BUFFERS);
4413 /* To import we need the other pool to hold at least own_min */
4414 if (obj->pool == pool)
4418 /* Request a bigger max, if one was suggested but it's too small */
4420 max = MAX (min, max);
4422 /* First step, configure our own pool */
4423 config = gst_buffer_pool_get_config (obj->pool);
4425 if (obj->need_video_meta || has_video_meta) {
4426 GST_DEBUG_OBJECT (obj->dbg_obj, "activate Video Meta");
4427 gst_buffer_pool_config_add_option (config,
4428 GST_BUFFER_POOL_OPTION_VIDEO_META);
4431 gst_buffer_pool_config_set_allocator (config, allocator, ¶ms);
4432 gst_buffer_pool_config_set_params (config, caps, size, own_min, 0);
4434 GST_DEBUG_OBJECT (obj->dbg_obj, "setting own pool config to %"
4435 GST_PTR_FORMAT, config);
4437 /* Our pool often need to adjust the value */
4438 if (!gst_buffer_pool_set_config (obj->pool, config)) {
4439 config = gst_buffer_pool_get_config (obj->pool);
4441 GST_DEBUG_OBJECT (obj->dbg_obj, "own pool config changed to %"
4442 GST_PTR_FORMAT, config);
4444 /* our pool will adjust the maximum buffer, which we are fine with */
4445 if (!gst_buffer_pool_set_config (obj->pool, config))
4449 /* Now configure the other pool if different */
4450 if (obj->pool != pool)
4454 config = gst_buffer_pool_get_config (other_pool);
4455 gst_buffer_pool_config_set_allocator (config, allocator, ¶ms);
4456 gst_buffer_pool_config_set_params (config, caps, size, min, max);
4458 GST_DEBUG_OBJECT (obj->dbg_obj, "setting other pool config to %"
4459 GST_PTR_FORMAT, config);
4461 /* if downstream supports video metadata, add this to the pool config */
4462 if (has_video_meta) {
4463 GST_DEBUG_OBJECT (obj->dbg_obj, "activate Video Meta");
4464 gst_buffer_pool_config_add_option (config,
4465 GST_BUFFER_POOL_OPTION_VIDEO_META);
4468 if (!gst_buffer_pool_set_config (other_pool, config)) {
4469 config = gst_buffer_pool_get_config (other_pool);
4471 if (!gst_buffer_pool_config_validate_params (config, caps, size, min,
4473 gst_structure_free (config);
4477 if (!gst_buffer_pool_set_config (other_pool, config))
4483 /* For simplicity, simply read back the active configuration, so our base
4484 * class get the right information */
4485 config = gst_buffer_pool_get_config (pool);
4486 gst_buffer_pool_config_get_params (config, NULL, &size, &min, &max);
4487 gst_structure_free (config);
4491 gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
4493 gst_query_add_allocation_pool (query, pool, size, min, max);
4496 gst_object_unref (allocator);
4499 gst_object_unref (pool);
4505 /* setup_pool already send the error */
4510 GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
4511 (_("Failed to configure internal buffer pool.")), (NULL));
4516 GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
4517 (_("Video device did not suggest any buffer size.")), (NULL));
4523 gst_object_unref (allocator);
4526 gst_object_unref (pool);
4531 GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
4532 (_("No downstream pool to import from.")),
4533 ("When importing DMABUF or USERPTR, we need a pool to import from"));
4539 gst_v4l2_object_propose_allocation (GstV4l2Object * obj, GstQuery * query)
4541 GstBufferPool *pool;
4542 /* we need at least 2 buffers to operate */
4543 guint size, min, max;
4547 /* Set defaults allocation parameters */
4548 size = obj->info.size;
4549 min = GST_V4L2_MIN_BUFFERS;
4550 max = VIDEO_MAX_FRAME;
4552 gst_query_parse_allocation (query, &caps, &need_pool);
4557 if ((pool = obj->pool))
4558 gst_object_ref (pool);
4562 GstStructure *config;
4564 /* we had a pool, check caps */
4565 config = gst_buffer_pool_get_config (pool);
4566 gst_buffer_pool_config_get_params (config, &pcaps, NULL, NULL, NULL);
4568 GST_DEBUG_OBJECT (obj->dbg_obj,
4569 "we had a pool with caps %" GST_PTR_FORMAT, pcaps);
4570 if (!gst_caps_is_equal (caps, pcaps)) {
4571 gst_structure_free (config);
4572 gst_object_unref (pool);
4573 goto different_caps;
4575 gst_structure_free (config);
4577 gst_v4l2_get_driver_min_buffers (obj);
4579 min = MAX (obj->min_buffers, GST_V4L2_MIN_BUFFERS);
4581 gst_query_add_allocation_pool (query, pool, size, min, max);
4583 /* we also support various metadata */
4584 gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
4587 gst_object_unref (pool);
4594 GST_DEBUG_OBJECT (obj->dbg_obj, "no caps specified");
4599 /* different caps, we can't use this pool */
4600 GST_DEBUG_OBJECT (obj->dbg_obj, "pool has different caps");