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;
933 static struct v4l2_fmtdesc *
934 gst_v4l2_object_get_format_from_fourcc (GstV4l2Object * v4l2object,
937 struct v4l2_fmtdesc *fmt;
943 walk = gst_v4l2_object_get_format_list (v4l2object);
945 fmt = (struct v4l2_fmtdesc *) walk->data;
946 if (fmt->pixelformat == fourcc)
948 /* special case for jpeg */
949 if (fmt->pixelformat == V4L2_PIX_FMT_MJPEG ||
950 fmt->pixelformat == V4L2_PIX_FMT_JPEG ||
951 fmt->pixelformat == V4L2_PIX_FMT_PJPG) {
952 if (fourcc == V4L2_PIX_FMT_JPEG || fourcc == V4L2_PIX_FMT_MJPEG ||
953 fourcc == V4L2_PIX_FMT_PJPG) {
957 walk = g_slist_next (walk);
965 /* complete made up ranking, the values themselves are meaningless */
966 /* These ranks MUST be X such that X<<15 fits on a signed int - see
967 the comment at the end of gst_v4l2_object_format_get_rank. */
968 #define YUV_BASE_RANK 1000
969 #define JPEG_BASE_RANK 500
970 #define DV_BASE_RANK 200
971 #define RGB_BASE_RANK 100
972 #define YUV_ODD_BASE_RANK 50
973 #define RGB_ODD_BASE_RANK 25
974 #define BAYER_BASE_RANK 15
975 #define S910_BASE_RANK 10
976 #define GREY_BASE_RANK 5
977 #define PWC_BASE_RANK 1
980 gst_v4l2_object_format_get_rank (const struct v4l2_fmtdesc *fmt)
982 guint32 fourcc = fmt->pixelformat;
983 gboolean emulated = ((fmt->flags & V4L2_FMT_FLAG_EMULATED) != 0);
987 case V4L2_PIX_FMT_MJPEG:
988 case V4L2_PIX_FMT_PJPG:
989 rank = JPEG_BASE_RANK;
991 case V4L2_PIX_FMT_JPEG:
992 rank = JPEG_BASE_RANK + 1;
994 case V4L2_PIX_FMT_MPEG: /* MPEG */
995 rank = JPEG_BASE_RANK + 2;
998 case V4L2_PIX_FMT_RGB332:
999 case V4L2_PIX_FMT_ARGB555:
1000 case V4L2_PIX_FMT_XRGB555:
1001 case V4L2_PIX_FMT_RGB555:
1002 case V4L2_PIX_FMT_ARGB555X:
1003 case V4L2_PIX_FMT_XRGB555X:
1004 case V4L2_PIX_FMT_RGB555X:
1005 case V4L2_PIX_FMT_BGR666:
1006 case V4L2_PIX_FMT_RGB565:
1007 case V4L2_PIX_FMT_RGB565X:
1008 case V4L2_PIX_FMT_RGB444:
1009 case V4L2_PIX_FMT_Y4:
1010 case V4L2_PIX_FMT_Y6:
1011 case V4L2_PIX_FMT_Y10:
1012 case V4L2_PIX_FMT_Y12:
1013 case V4L2_PIX_FMT_Y10BPACK:
1014 case V4L2_PIX_FMT_YUV555:
1015 case V4L2_PIX_FMT_YUV565:
1016 case V4L2_PIX_FMT_YUV32:
1017 case V4L2_PIX_FMT_NV12MT_16X16:
1018 case V4L2_PIX_FMT_NV42:
1019 case V4L2_PIX_FMT_H264_MVC:
1020 rank = RGB_ODD_BASE_RANK;
1023 case V4L2_PIX_FMT_RGB24:
1024 case V4L2_PIX_FMT_BGR24:
1025 rank = RGB_BASE_RANK - 1;
1028 case V4L2_PIX_FMT_RGB32:
1029 case V4L2_PIX_FMT_BGR32:
1030 case V4L2_PIX_FMT_ABGR32:
1031 case V4L2_PIX_FMT_XBGR32:
1032 case V4L2_PIX_FMT_ARGB32:
1033 case V4L2_PIX_FMT_XRGB32:
1034 rank = RGB_BASE_RANK;
1037 case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
1038 rank = GREY_BASE_RANK;
1041 case V4L2_PIX_FMT_NV12: /* 12 Y/CbCr 4:2:0 */
1042 case V4L2_PIX_FMT_NV12M: /* Same as NV12 */
1043 case V4L2_PIX_FMT_NV12MT: /* NV12 64x32 tile */
1044 case V4L2_PIX_FMT_NV21: /* 12 Y/CrCb 4:2:0 */
1045 case V4L2_PIX_FMT_NV21M: /* Same as NV21 */
1046 case V4L2_PIX_FMT_YYUV: /* 16 YUV 4:2:2 */
1047 case V4L2_PIX_FMT_HI240: /* 8 8-bit color */
1048 case V4L2_PIX_FMT_NV16: /* 16 Y/CbCr 4:2:2 */
1049 case V4L2_PIX_FMT_NV16M: /* Same as NV16 */
1050 case V4L2_PIX_FMT_NV61: /* 16 Y/CrCb 4:2:2 */
1051 case V4L2_PIX_FMT_NV61M: /* Same as NV61 */
1052 case V4L2_PIX_FMT_NV24: /* 24 Y/CrCb 4:4:4 */
1053 rank = YUV_ODD_BASE_RANK;
1056 case V4L2_PIX_FMT_YVU410: /* YVU9, 9 bits per pixel */
1057 rank = YUV_BASE_RANK + 3;
1059 case V4L2_PIX_FMT_YUV410: /* YUV9, 9 bits per pixel */
1060 rank = YUV_BASE_RANK + 2;
1062 case V4L2_PIX_FMT_YUV420: /* I420, 12 bits per pixel */
1063 case V4L2_PIX_FMT_YUV420M:
1064 rank = YUV_BASE_RANK + 7;
1066 case V4L2_PIX_FMT_YUYV: /* YUY2, 16 bits per pixel */
1067 rank = YUV_BASE_RANK + 10;
1069 case V4L2_PIX_FMT_YVU420: /* YV12, 12 bits per pixel */
1070 rank = YUV_BASE_RANK + 6;
1072 case V4L2_PIX_FMT_UYVY: /* UYVY, 16 bits per pixel */
1073 rank = YUV_BASE_RANK + 9;
1075 case V4L2_PIX_FMT_YUV444:
1076 rank = YUV_BASE_RANK + 6;
1078 case V4L2_PIX_FMT_Y41P: /* Y41P, 12 bits per pixel */
1079 rank = YUV_BASE_RANK + 5;
1081 case V4L2_PIX_FMT_YUV411P: /* Y41B, 12 bits per pixel */
1082 rank = YUV_BASE_RANK + 4;
1084 case V4L2_PIX_FMT_YUV422P: /* Y42B, 16 bits per pixel */
1085 rank = YUV_BASE_RANK + 8;
1088 case V4L2_PIX_FMT_DV:
1089 rank = DV_BASE_RANK;
1092 case V4L2_PIX_FMT_WNVA: /* Winnov hw compres */
1096 case V4L2_PIX_FMT_SBGGR8:
1097 case V4L2_PIX_FMT_SGBRG8:
1098 case V4L2_PIX_FMT_SGRBG8:
1099 case V4L2_PIX_FMT_SRGGB8:
1100 rank = BAYER_BASE_RANK;
1103 case V4L2_PIX_FMT_SN9C10X:
1104 rank = S910_BASE_RANK;
1107 case V4L2_PIX_FMT_PWC1:
1108 rank = PWC_BASE_RANK;
1110 case V4L2_PIX_FMT_PWC2:
1111 rank = PWC_BASE_RANK;
1119 /* All ranks are below 1<<15 so a shift by 15
1120 * will a) make all non-emulated formats larger
1121 * than emulated and b) will not overflow
1132 format_cmp_func (gconstpointer a, gconstpointer b)
1134 const struct v4l2_fmtdesc *fa = a;
1135 const struct v4l2_fmtdesc *fb = b;
1137 if (fa->pixelformat == fb->pixelformat)
1140 return gst_v4l2_object_format_get_rank (fb) -
1141 gst_v4l2_object_format_get_rank (fa);
1144 /******************************************************
1145 * gst_v4l2_object_fill_format_list():
1146 * create list of supported capture formats
1147 * return value: TRUE on success, FALSE on error
1148 ******************************************************/
1150 gst_v4l2_object_fill_format_list (GstV4l2Object * v4l2object,
1151 enum v4l2_buf_type type)
1154 struct v4l2_fmtdesc *format;
1156 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "getting src format enumerations");
1158 /* format enumeration */
1160 format = g_new0 (struct v4l2_fmtdesc, 1);
1163 format->type = type;
1165 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_ENUM_FMT, format) < 0) {
1166 if (errno == EINVAL) {
1168 break; /* end of enumeration */
1174 GST_LOG_OBJECT (v4l2object->dbg_obj, "index: %u", format->index);
1175 GST_LOG_OBJECT (v4l2object->dbg_obj, "type: %d", format->type);
1176 GST_LOG_OBJECT (v4l2object->dbg_obj, "flags: %08x", format->flags);
1177 GST_LOG_OBJECT (v4l2object->dbg_obj, "description: '%s'",
1178 format->description);
1179 GST_LOG_OBJECT (v4l2object->dbg_obj, "pixelformat: %" GST_FOURCC_FORMAT,
1180 GST_FOURCC_ARGS (format->pixelformat));
1182 /* sort formats according to our preference; we do this, because caps
1183 * are probed in the order the formats are in the list, and the order of
1184 * formats in the final probed caps matters for things like fixation */
1185 v4l2object->formats = g_slist_insert_sorted (v4l2object->formats, format,
1186 (GCompareFunc) format_cmp_func);
1189 #ifndef GST_DISABLE_GST_DEBUG
1193 GST_INFO_OBJECT (v4l2object->dbg_obj, "got %d format(s):", n);
1194 for (l = v4l2object->formats; l != NULL; l = l->next) {
1197 GST_INFO_OBJECT (v4l2object->dbg_obj,
1198 " %" GST_FOURCC_FORMAT "%s", GST_FOURCC_ARGS (format->pixelformat),
1199 ((format->flags & V4L2_FMT_FLAG_EMULATED)) ? " (emulated)" : "");
1211 if (v4l2object->element)
1214 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
1215 (_("Failed to enumerate possible video formats device '%s' can work "
1216 "with"), v4l2object->videodev),
1217 ("Failed to get number %d in pixelformat enumeration for %s. (%d - %s)",
1218 n, v4l2object->videodev, errno, g_strerror (errno)));
1225 * Get the list of supported capture formats, a list of
1226 * <code>struct v4l2_fmtdesc</code>.
1229 gst_v4l2_object_get_format_list (GstV4l2Object * v4l2object)
1231 if (!v4l2object->formats) {
1233 /* check usual way */
1234 gst_v4l2_object_fill_format_list (v4l2object, v4l2object->type);
1236 /* if our driver supports multi-planar
1237 * and if formats are still empty then we can workaround driver bug
1238 * by also looking up formats as if our device was not supporting
1240 if (!v4l2object->formats) {
1241 switch (v4l2object->type) {
1242 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1243 gst_v4l2_object_fill_format_list (v4l2object,
1244 V4L2_BUF_TYPE_VIDEO_CAPTURE);
1247 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1248 gst_v4l2_object_fill_format_list (v4l2object,
1249 V4L2_BUF_TYPE_VIDEO_OUTPUT);
1257 return v4l2object->formats;
1260 static GstVideoFormat
1261 gst_v4l2_object_v4l2fourcc_to_video_format (guint32 fourcc)
1263 GstVideoFormat format;
1266 case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
1267 format = GST_VIDEO_FORMAT_GRAY8;
1269 case V4L2_PIX_FMT_Y16:
1270 format = GST_VIDEO_FORMAT_GRAY16_LE;
1272 case V4L2_PIX_FMT_Y16_BE:
1273 format = GST_VIDEO_FORMAT_GRAY16_BE;
1275 case V4L2_PIX_FMT_XRGB555:
1276 case V4L2_PIX_FMT_RGB555:
1277 format = GST_VIDEO_FORMAT_RGB15;
1279 case V4L2_PIX_FMT_XRGB555X:
1280 case V4L2_PIX_FMT_RGB555X:
1281 format = GST_VIDEO_FORMAT_BGR15;
1283 case V4L2_PIX_FMT_RGB565:
1284 format = GST_VIDEO_FORMAT_RGB16;
1286 case V4L2_PIX_FMT_RGB24:
1287 format = GST_VIDEO_FORMAT_RGB;
1289 case V4L2_PIX_FMT_BGR24:
1290 format = GST_VIDEO_FORMAT_BGR;
1292 case V4L2_PIX_FMT_XRGB32:
1293 case V4L2_PIX_FMT_RGB32:
1294 format = GST_VIDEO_FORMAT_xRGB;
1296 case V4L2_PIX_FMT_XBGR32:
1297 case V4L2_PIX_FMT_BGR32:
1298 format = GST_VIDEO_FORMAT_BGRx;
1300 case V4L2_PIX_FMT_ABGR32:
1301 format = GST_VIDEO_FORMAT_BGRA;
1303 case V4L2_PIX_FMT_ARGB32:
1304 format = GST_VIDEO_FORMAT_ARGB;
1306 case V4L2_PIX_FMT_NV12:
1307 case V4L2_PIX_FMT_NV12M:
1308 format = GST_VIDEO_FORMAT_NV12;
1310 case V4L2_PIX_FMT_NV12MT:
1311 format = GST_VIDEO_FORMAT_NV12_64Z32;
1313 case V4L2_PIX_FMT_NV21:
1314 case V4L2_PIX_FMT_NV21M:
1315 format = GST_VIDEO_FORMAT_NV21;
1317 case V4L2_PIX_FMT_YVU410:
1318 format = GST_VIDEO_FORMAT_YVU9;
1320 case V4L2_PIX_FMT_YUV410:
1321 format = GST_VIDEO_FORMAT_YUV9;
1323 case V4L2_PIX_FMT_YUV420:
1324 case V4L2_PIX_FMT_YUV420M:
1325 format = GST_VIDEO_FORMAT_I420;
1327 case V4L2_PIX_FMT_YUYV:
1328 format = GST_VIDEO_FORMAT_YUY2;
1330 case V4L2_PIX_FMT_YVU420:
1331 format = GST_VIDEO_FORMAT_YV12;
1333 case V4L2_PIX_FMT_UYVY:
1334 format = GST_VIDEO_FORMAT_UYVY;
1336 case V4L2_PIX_FMT_YUV411P:
1337 format = GST_VIDEO_FORMAT_Y41B;
1339 case V4L2_PIX_FMT_YUV422P:
1340 format = GST_VIDEO_FORMAT_Y42B;
1342 case V4L2_PIX_FMT_YVYU:
1343 format = GST_VIDEO_FORMAT_YVYU;
1345 case V4L2_PIX_FMT_NV16:
1346 case V4L2_PIX_FMT_NV16M:
1347 format = GST_VIDEO_FORMAT_NV16;
1349 case V4L2_PIX_FMT_NV61:
1350 case V4L2_PIX_FMT_NV61M:
1351 format = GST_VIDEO_FORMAT_NV61;
1353 case V4L2_PIX_FMT_NV24:
1354 format = GST_VIDEO_FORMAT_NV24;
1357 format = GST_VIDEO_FORMAT_UNKNOWN;
1365 gst_v4l2_object_v4l2fourcc_is_rgb (guint32 fourcc)
1367 gboolean ret = FALSE;
1370 case V4L2_PIX_FMT_XRGB555:
1371 case V4L2_PIX_FMT_RGB555:
1372 case V4L2_PIX_FMT_XRGB555X:
1373 case V4L2_PIX_FMT_RGB555X:
1374 case V4L2_PIX_FMT_RGB565:
1375 case V4L2_PIX_FMT_RGB24:
1376 case V4L2_PIX_FMT_BGR24:
1377 case V4L2_PIX_FMT_XRGB32:
1378 case V4L2_PIX_FMT_RGB32:
1379 case V4L2_PIX_FMT_XBGR32:
1380 case V4L2_PIX_FMT_BGR32:
1381 case V4L2_PIX_FMT_ABGR32:
1382 case V4L2_PIX_FMT_ARGB32:
1392 static GstStructure *
1393 gst_v4l2_object_v4l2fourcc_to_bare_struct (guint32 fourcc)
1395 GstStructure *structure = NULL;
1398 case V4L2_PIX_FMT_MJPEG: /* Motion-JPEG */
1399 case V4L2_PIX_FMT_PJPG: /* Progressive-JPEG */
1400 case V4L2_PIX_FMT_JPEG: /* JFIF JPEG */
1401 structure = gst_structure_new_empty ("image/jpeg");
1403 case V4L2_PIX_FMT_MPEG1:
1404 structure = gst_structure_new ("video/mpeg",
1405 "mpegversion", G_TYPE_INT, 2, NULL);
1407 case V4L2_PIX_FMT_MPEG2:
1408 structure = gst_structure_new ("video/mpeg",
1409 "mpegversion", G_TYPE_INT, 2, NULL);
1411 case V4L2_PIX_FMT_MPEG4:
1412 case V4L2_PIX_FMT_XVID:
1413 structure = gst_structure_new ("video/mpeg",
1414 "mpegversion", G_TYPE_INT, 4, "systemstream",
1415 G_TYPE_BOOLEAN, FALSE, NULL);
1417 case V4L2_PIX_FMT_H263:
1418 structure = gst_structure_new ("video/x-h263",
1419 "variant", G_TYPE_STRING, "itu", NULL);
1421 case V4L2_PIX_FMT_H264: /* H.264 */
1422 structure = gst_structure_new ("video/x-h264",
1423 "stream-format", G_TYPE_STRING, "byte-stream", "alignment",
1424 G_TYPE_STRING, "au", NULL);
1426 case V4L2_PIX_FMT_H264_NO_SC:
1427 structure = gst_structure_new ("video/x-h264",
1428 "stream-format", G_TYPE_STRING, "avc", "alignment",
1429 G_TYPE_STRING, "au", NULL);
1431 case V4L2_PIX_FMT_VC1_ANNEX_G:
1432 case V4L2_PIX_FMT_VC1_ANNEX_L:
1433 structure = gst_structure_new ("video/x-wmv",
1434 "wmvversion", G_TYPE_INT, 3, "format", G_TYPE_STRING, "WVC1", NULL);
1436 case V4L2_PIX_FMT_VP8:
1437 structure = gst_structure_new_empty ("video/x-vp8");
1439 case V4L2_PIX_FMT_VP9:
1440 structure = gst_structure_new_empty ("video/x-vp9");
1442 case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
1443 case V4L2_PIX_FMT_Y16:
1444 case V4L2_PIX_FMT_Y16_BE:
1445 case V4L2_PIX_FMT_XRGB555:
1446 case V4L2_PIX_FMT_RGB555:
1447 case V4L2_PIX_FMT_XRGB555X:
1448 case V4L2_PIX_FMT_RGB555X:
1449 case V4L2_PIX_FMT_RGB565:
1450 case V4L2_PIX_FMT_RGB24:
1451 case V4L2_PIX_FMT_BGR24:
1452 case V4L2_PIX_FMT_RGB32:
1453 case V4L2_PIX_FMT_XRGB32:
1454 case V4L2_PIX_FMT_ARGB32:
1455 case V4L2_PIX_FMT_BGR32:
1456 case V4L2_PIX_FMT_XBGR32:
1457 case V4L2_PIX_FMT_ABGR32:
1458 case V4L2_PIX_FMT_NV12: /* 12 Y/CbCr 4:2:0 */
1459 case V4L2_PIX_FMT_NV12M:
1460 case V4L2_PIX_FMT_NV12MT:
1461 case V4L2_PIX_FMT_NV21: /* 12 Y/CrCb 4:2:0 */
1462 case V4L2_PIX_FMT_NV21M:
1463 case V4L2_PIX_FMT_NV16: /* 16 Y/CbCr 4:2:2 */
1464 case V4L2_PIX_FMT_NV16M:
1465 case V4L2_PIX_FMT_NV61: /* 16 Y/CrCb 4:2:2 */
1466 case V4L2_PIX_FMT_NV61M:
1467 case V4L2_PIX_FMT_NV24: /* 24 Y/CrCb 4:4:4 */
1468 case V4L2_PIX_FMT_YVU410:
1469 case V4L2_PIX_FMT_YUV410:
1470 case V4L2_PIX_FMT_YUV420: /* I420/IYUV */
1471 case V4L2_PIX_FMT_YUV420M:
1472 case V4L2_PIX_FMT_YUYV:
1473 case V4L2_PIX_FMT_YVU420:
1474 case V4L2_PIX_FMT_UYVY:
1475 case V4L2_PIX_FMT_YUV422P:
1476 case V4L2_PIX_FMT_YVYU:
1477 case V4L2_PIX_FMT_YUV411P:{
1478 GstVideoFormat format;
1479 format = gst_v4l2_object_v4l2fourcc_to_video_format (fourcc);
1480 if (format != GST_VIDEO_FORMAT_UNKNOWN)
1481 structure = gst_structure_new ("video/x-raw",
1482 "format", G_TYPE_STRING, gst_video_format_to_string (format), NULL);
1485 case V4L2_PIX_FMT_DV:
1487 gst_structure_new ("video/x-dv", "systemstream", G_TYPE_BOOLEAN, TRUE,
1490 case V4L2_PIX_FMT_MPEG: /* MPEG */
1491 structure = gst_structure_new ("video/mpegts",
1492 "systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
1494 case V4L2_PIX_FMT_WNVA: /* Winnov hw compres */
1496 case V4L2_PIX_FMT_SBGGR8:
1497 case V4L2_PIX_FMT_SGBRG8:
1498 case V4L2_PIX_FMT_SGRBG8:
1499 case V4L2_PIX_FMT_SRGGB8:
1500 structure = gst_structure_new ("video/x-bayer", "format", G_TYPE_STRING,
1501 fourcc == V4L2_PIX_FMT_SBGGR8 ? "bggr" :
1502 fourcc == V4L2_PIX_FMT_SGBRG8 ? "gbrg" :
1503 fourcc == V4L2_PIX_FMT_SGRBG8 ? "grbg" :
1504 /* fourcc == V4L2_PIX_FMT_SRGGB8 ? */ "rggb", NULL);
1506 case V4L2_PIX_FMT_SN9C10X:
1507 structure = gst_structure_new_empty ("video/x-sonix");
1509 case V4L2_PIX_FMT_PWC1:
1510 structure = gst_structure_new_empty ("video/x-pwc1");
1512 case V4L2_PIX_FMT_PWC2:
1513 structure = gst_structure_new_empty ("video/x-pwc2");
1515 case V4L2_PIX_FMT_RGB332:
1516 case V4L2_PIX_FMT_BGR666:
1517 case V4L2_PIX_FMT_ARGB555X:
1518 case V4L2_PIX_FMT_RGB565X:
1519 case V4L2_PIX_FMT_RGB444:
1520 case V4L2_PIX_FMT_YYUV: /* 16 YUV 4:2:2 */
1521 case V4L2_PIX_FMT_HI240: /* 8 8-bit color */
1522 case V4L2_PIX_FMT_Y4:
1523 case V4L2_PIX_FMT_Y6:
1524 case V4L2_PIX_FMT_Y10:
1525 case V4L2_PIX_FMT_Y12:
1526 case V4L2_PIX_FMT_Y10BPACK:
1527 case V4L2_PIX_FMT_YUV444:
1528 case V4L2_PIX_FMT_YUV555:
1529 case V4L2_PIX_FMT_YUV565:
1530 case V4L2_PIX_FMT_Y41P:
1531 case V4L2_PIX_FMT_YUV32:
1532 case V4L2_PIX_FMT_NV12MT_16X16:
1533 case V4L2_PIX_FMT_NV42:
1534 case V4L2_PIX_FMT_H264_MVC:
1536 GST_DEBUG ("Unsupported fourcc 0x%08x %" GST_FOURCC_FORMAT,
1537 fourcc, GST_FOURCC_ARGS (fourcc));
1545 gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc)
1547 GstStructure *template;
1550 template = gst_v4l2_object_v4l2fourcc_to_bare_struct (fourcc);
1552 if (template == NULL)
1555 for (i = 0; i < GST_V4L2_FORMAT_COUNT; i++) {
1556 if (gst_v4l2_formats[i].format != fourcc)
1559 if (gst_v4l2_formats[i].dimensions) {
1560 gst_structure_set (template,
1561 "width", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1562 "height", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1563 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
1574 gst_v4l2_object_get_caps_helper (GstV4L2FormatFlags flags)
1576 GstStructure *structure;
1580 caps = gst_caps_new_empty ();
1581 for (i = 0; i < GST_V4L2_FORMAT_COUNT; i++) {
1583 if ((gst_v4l2_formats[i].flags & flags) == 0)
1587 gst_v4l2_object_v4l2fourcc_to_bare_struct (gst_v4l2_formats[i].format);
1590 GstStructure *alt_s = NULL;
1592 if (gst_v4l2_formats[i].dimensions) {
1593 gst_structure_set (structure,
1594 "width", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1595 "height", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1596 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
1599 switch (gst_v4l2_formats[i].format) {
1600 case V4L2_PIX_FMT_RGB32:
1601 alt_s = gst_structure_copy (structure);
1602 gst_structure_set (alt_s, "format", G_TYPE_STRING, "ARGB", NULL);
1604 case V4L2_PIX_FMT_BGR32:
1605 alt_s = gst_structure_copy (structure);
1606 gst_structure_set (alt_s, "format", G_TYPE_STRING, "BGRA", NULL);
1611 gst_caps_append_structure (caps, structure);
1614 gst_caps_append_structure (caps, alt_s);
1618 return gst_caps_simplify (caps);
1622 gst_v4l2_object_get_all_caps (void)
1624 static GstCaps *caps = NULL;
1626 if (g_once_init_enter (&caps)) {
1627 GstCaps *all_caps = gst_v4l2_object_get_caps_helper (GST_V4L2_ALL);
1628 GST_MINI_OBJECT_FLAG_SET (all_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
1629 g_once_init_leave (&caps, all_caps);
1636 gst_v4l2_object_get_raw_caps (void)
1638 static GstCaps *caps = NULL;
1640 if (g_once_init_enter (&caps)) {
1641 GstCaps *raw_caps = gst_v4l2_object_get_caps_helper (GST_V4L2_RAW);
1642 GST_MINI_OBJECT_FLAG_SET (raw_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
1643 g_once_init_leave (&caps, raw_caps);
1650 gst_v4l2_object_get_codec_caps (void)
1652 static GstCaps *caps = NULL;
1654 if (g_once_init_enter (&caps)) {
1655 GstCaps *codec_caps = gst_v4l2_object_get_caps_helper (GST_V4L2_CODEC);
1656 GST_MINI_OBJECT_FLAG_SET (codec_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
1657 g_once_init_leave (&caps, codec_caps);
1663 /* collect data for the given caps
1664 * @caps: given input caps
1665 * @format: location for the v4l format
1666 * @w/@h: location for width and height
1667 * @fps_n/@fps_d: location for framerate
1668 * @size: location for expected size of the frame or 0 if unknown
1671 gst_v4l2_object_get_caps_info (GstV4l2Object * v4l2object, GstCaps * caps,
1672 struct v4l2_fmtdesc **format, GstVideoInfo * info)
1674 GstStructure *structure;
1675 guint32 fourcc = 0, fourcc_nc = 0;
1676 const gchar *mimetype;
1677 struct v4l2_fmtdesc *fmt = NULL;
1679 structure = gst_caps_get_structure (caps, 0);
1681 mimetype = gst_structure_get_name (structure);
1683 if (!gst_video_info_from_caps (info, caps))
1684 goto invalid_format;
1686 if (g_str_equal (mimetype, "video/x-raw")) {
1687 switch (GST_VIDEO_INFO_FORMAT (info)) {
1688 case GST_VIDEO_FORMAT_I420:
1689 fourcc = V4L2_PIX_FMT_YUV420;
1690 fourcc_nc = V4L2_PIX_FMT_YUV420M;
1692 case GST_VIDEO_FORMAT_YUY2:
1693 fourcc = V4L2_PIX_FMT_YUYV;
1695 case GST_VIDEO_FORMAT_UYVY:
1696 fourcc = V4L2_PIX_FMT_UYVY;
1698 case GST_VIDEO_FORMAT_YV12:
1699 fourcc = V4L2_PIX_FMT_YVU420;
1701 case GST_VIDEO_FORMAT_Y41B:
1702 fourcc = V4L2_PIX_FMT_YUV411P;
1704 case GST_VIDEO_FORMAT_Y42B:
1705 fourcc = V4L2_PIX_FMT_YUV422P;
1707 case GST_VIDEO_FORMAT_NV12:
1708 fourcc = V4L2_PIX_FMT_NV12;
1709 fourcc_nc = V4L2_PIX_FMT_NV12M;
1711 case GST_VIDEO_FORMAT_NV12_64Z32:
1712 fourcc_nc = V4L2_PIX_FMT_NV12MT;
1714 case GST_VIDEO_FORMAT_NV21:
1715 fourcc = V4L2_PIX_FMT_NV21;
1716 fourcc_nc = V4L2_PIX_FMT_NV21M;
1718 case GST_VIDEO_FORMAT_NV16:
1719 fourcc = V4L2_PIX_FMT_NV16;
1720 fourcc_nc = V4L2_PIX_FMT_NV16M;
1722 case GST_VIDEO_FORMAT_NV61:
1723 fourcc = V4L2_PIX_FMT_NV61;
1724 fourcc_nc = V4L2_PIX_FMT_NV61M;
1726 case GST_VIDEO_FORMAT_NV24:
1727 fourcc = V4L2_PIX_FMT_NV24;
1729 case GST_VIDEO_FORMAT_YVYU:
1730 fourcc = V4L2_PIX_FMT_YVYU;
1732 case GST_VIDEO_FORMAT_RGB15:
1733 fourcc = V4L2_PIX_FMT_RGB555;
1734 fourcc_nc = V4L2_PIX_FMT_XRGB555;
1736 case GST_VIDEO_FORMAT_RGB16:
1737 fourcc = V4L2_PIX_FMT_RGB565;
1739 case GST_VIDEO_FORMAT_RGB:
1740 fourcc = V4L2_PIX_FMT_RGB24;
1742 case GST_VIDEO_FORMAT_BGR:
1743 fourcc = V4L2_PIX_FMT_BGR24;
1745 case GST_VIDEO_FORMAT_xRGB:
1746 fourcc = V4L2_PIX_FMT_RGB32;
1747 fourcc_nc = V4L2_PIX_FMT_XRGB32;
1749 case GST_VIDEO_FORMAT_ARGB:
1750 fourcc = V4L2_PIX_FMT_RGB32;
1751 fourcc_nc = V4L2_PIX_FMT_ARGB32;
1753 case GST_VIDEO_FORMAT_BGRx:
1754 fourcc = V4L2_PIX_FMT_BGR32;
1755 fourcc_nc = V4L2_PIX_FMT_XBGR32;
1757 case GST_VIDEO_FORMAT_BGRA:
1758 fourcc = V4L2_PIX_FMT_BGR32;
1759 fourcc_nc = V4L2_PIX_FMT_ABGR32;
1761 case GST_VIDEO_FORMAT_GRAY8:
1762 fourcc = V4L2_PIX_FMT_GREY;
1764 case GST_VIDEO_FORMAT_GRAY16_LE:
1765 fourcc = V4L2_PIX_FMT_Y16;
1767 case GST_VIDEO_FORMAT_GRAY16_BE:
1768 fourcc = V4L2_PIX_FMT_Y16_BE;
1774 if (g_str_equal (mimetype, "video/mpegts")) {
1775 fourcc = V4L2_PIX_FMT_MPEG;
1776 } else if (g_str_equal (mimetype, "video/x-dv")) {
1777 fourcc = V4L2_PIX_FMT_DV;
1778 } else if (g_str_equal (mimetype, "image/jpeg")) {
1779 fourcc = V4L2_PIX_FMT_JPEG;
1780 } else if (g_str_equal (mimetype, "video/mpeg")) {
1782 if (gst_structure_get_int (structure, "mpegversion", &version)) {
1785 fourcc = V4L2_PIX_FMT_MPEG1;
1788 fourcc = V4L2_PIX_FMT_MPEG2;
1791 fourcc = V4L2_PIX_FMT_MPEG4;
1792 fourcc_nc = V4L2_PIX_FMT_XVID;
1798 } else if (g_str_equal (mimetype, "video/x-h263")) {
1799 fourcc = V4L2_PIX_FMT_H263;
1800 } else if (g_str_equal (mimetype, "video/x-h264")) {
1801 const gchar *stream_format =
1802 gst_structure_get_string (structure, "stream-format");
1803 if (g_str_equal (stream_format, "avc"))
1804 fourcc = V4L2_PIX_FMT_H264_NO_SC;
1806 fourcc = V4L2_PIX_FMT_H264;
1807 } else if (g_str_equal (mimetype, "video/x-vp8")) {
1808 fourcc = V4L2_PIX_FMT_VP8;
1809 } else if (g_str_equal (mimetype, "video/x-vp9")) {
1810 fourcc = V4L2_PIX_FMT_VP9;
1811 } else if (g_str_equal (mimetype, "video/x-bayer")) {
1812 const gchar *format = gst_structure_get_string (structure, "format");
1814 if (!g_ascii_strcasecmp (format, "bggr"))
1815 fourcc = V4L2_PIX_FMT_SBGGR8;
1816 else if (!g_ascii_strcasecmp (format, "gbrg"))
1817 fourcc = V4L2_PIX_FMT_SGBRG8;
1818 else if (!g_ascii_strcasecmp (format, "grbg"))
1819 fourcc = V4L2_PIX_FMT_SGRBG8;
1820 else if (!g_ascii_strcasecmp (format, "rggb"))
1821 fourcc = V4L2_PIX_FMT_SRGGB8;
1823 } else if (g_str_equal (mimetype, "video/x-sonix")) {
1824 fourcc = V4L2_PIX_FMT_SN9C10X;
1825 } else if (g_str_equal (mimetype, "video/x-pwc1")) {
1826 fourcc = V4L2_PIX_FMT_PWC1;
1827 } else if (g_str_equal (mimetype, "video/x-pwc2")) {
1828 fourcc = V4L2_PIX_FMT_PWC2;
1833 /* Prefer the non-contiguous if supported */
1834 v4l2object->prefered_non_contiguous = TRUE;
1837 fmt = gst_v4l2_object_get_format_from_fourcc (v4l2object, fourcc_nc);
1838 else if (fourcc == 0)
1839 goto unhandled_format;
1842 fmt = gst_v4l2_object_get_format_from_fourcc (v4l2object, fourcc);
1843 v4l2object->prefered_non_contiguous = FALSE;
1847 goto unsupported_format;
1856 GST_DEBUG_OBJECT (v4l2object, "invalid format");
1861 GST_DEBUG_OBJECT (v4l2object, "unhandled format");
1866 GST_DEBUG_OBJECT (v4l2object, "unsupported format");
1872 gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
1873 guint32 pixelformat, gint * width, gint * height);
1876 gst_v4l2_object_add_aspect_ratio (GstV4l2Object * v4l2object, GstStructure * s)
1878 if (v4l2object->keep_aspect && v4l2object->par)
1879 gst_structure_set_value (s, "pixel-aspect-ratio", v4l2object->par);
1882 /* returns TRUE if the value was changed in place, otherwise FALSE */
1884 gst_v4l2src_value_simplify (GValue * val)
1886 /* simplify list of one value to one value */
1887 if (GST_VALUE_HOLDS_LIST (val) && gst_value_list_get_size (val) == 1) {
1888 const GValue *list_val;
1889 GValue new_val = G_VALUE_INIT;
1891 list_val = gst_value_list_get_value (val, 0);
1892 g_value_init (&new_val, G_VALUE_TYPE (list_val));
1893 g_value_copy (list_val, &new_val);
1894 g_value_unset (val);
1903 gst_v4l2_object_get_interlace_mode (enum v4l2_field field,
1904 GstVideoInterlaceMode * interlace_mode)
1906 /* NB: If you add new return values, please fix mode_strings in
1907 * gst_v4l2_object_add_interlace_mode */
1909 case V4L2_FIELD_ANY:
1911 ("Driver bug detected - check driver with v4l2-compliance from http://git.linuxtv.org/v4l-utils.git\n");
1913 case V4L2_FIELD_NONE:
1914 *interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
1916 case V4L2_FIELD_INTERLACED:
1917 case V4L2_FIELD_INTERLACED_TB:
1918 case V4L2_FIELD_INTERLACED_BT:
1919 *interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
1922 GST_ERROR ("Unknown enum v4l2_field %d", field);
1928 gst_v4l2_object_get_colorspace (struct v4l2_format *fmt,
1929 GstVideoColorimetry * cinfo)
1932 gst_v4l2_object_v4l2fourcc_is_rgb (fmt->fmt.pix.pixelformat);
1933 enum v4l2_colorspace colorspace;
1934 enum v4l2_quantization range;
1935 enum v4l2_ycbcr_encoding matrix;
1936 enum v4l2_xfer_func transfer;
1937 gboolean ret = TRUE;
1939 if (V4L2_TYPE_IS_MULTIPLANAR (fmt->type)) {
1940 colorspace = fmt->fmt.pix_mp.colorspace;
1941 range = fmt->fmt.pix_mp.quantization;
1942 matrix = fmt->fmt.pix_mp.ycbcr_enc;
1943 transfer = fmt->fmt.pix_mp.xfer_func;
1945 colorspace = fmt->fmt.pix.colorspace;
1946 range = fmt->fmt.pix.quantization;
1947 matrix = fmt->fmt.pix.ycbcr_enc;
1948 transfer = fmt->fmt.pix.xfer_func;
1951 /* First step, set the defaults for each primaries */
1952 switch (colorspace) {
1953 case V4L2_COLORSPACE_SMPTE170M:
1954 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1955 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
1956 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
1957 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_SMPTE170M;
1959 case V4L2_COLORSPACE_REC709:
1960 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1961 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT709;
1962 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
1963 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT709;
1965 case V4L2_COLORSPACE_SRGB:
1966 case V4L2_COLORSPACE_JPEG:
1967 cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
1968 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
1969 cinfo->transfer = GST_VIDEO_TRANSFER_SRGB;
1970 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT709;
1972 case V4L2_COLORSPACE_ADOBERGB:
1973 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1974 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
1975 cinfo->transfer = GST_VIDEO_TRANSFER_ADOBERGB;
1976 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_ADOBERGB;
1978 case V4L2_COLORSPACE_BT2020:
1979 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1980 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT2020;
1981 cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12;
1982 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT2020;
1984 case V4L2_COLORSPACE_SMPTE240M:
1985 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1986 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_SMPTE240M;
1987 cinfo->transfer = GST_VIDEO_TRANSFER_SMPTE240M;
1988 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_SMPTE240M;
1990 case V4L2_COLORSPACE_470_SYSTEM_M:
1991 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1992 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
1993 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
1994 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT470M;
1996 case V4L2_COLORSPACE_470_SYSTEM_BG:
1997 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1998 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
1999 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
2000 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT470BG;
2002 case V4L2_COLORSPACE_RAW:
2003 /* Explicitly unknown */
2004 cinfo->range = GST_VIDEO_COLOR_RANGE_UNKNOWN;
2005 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_UNKNOWN;
2006 cinfo->transfer = GST_VIDEO_TRANSFER_UNKNOWN;
2007 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_UNKNOWN;
2010 GST_DEBUG ("Unknown enum v4l2_colorspace %d", colorspace);
2018 /* Second step, apply any custom variation */
2020 case V4L2_QUANTIZATION_FULL_RANGE:
2021 cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
2023 case V4L2_QUANTIZATION_LIM_RANGE:
2024 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2026 case V4L2_QUANTIZATION_DEFAULT:
2027 /* replicated V4L2_MAP_QUANTIZATION_DEFAULT macro behavior */
2028 if (is_rgb && colorspace == V4L2_COLORSPACE_BT2020)
2029 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2030 else if (is_rgb || matrix == V4L2_YCBCR_ENC_XV601
2031 || matrix == V4L2_YCBCR_ENC_XV709
2032 || colorspace == V4L2_COLORSPACE_JPEG)
2033 cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
2035 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2038 GST_WARNING ("Unknown enum v4l2_quantization value %d", range);
2039 cinfo->range = GST_VIDEO_COLOR_RANGE_UNKNOWN;
2044 case V4L2_YCBCR_ENC_XV601:
2045 case V4L2_YCBCR_ENC_SYCC:
2046 GST_FIXME ("XV601 and SYCC not defined, assuming 601");
2048 case V4L2_YCBCR_ENC_601:
2049 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
2051 case V4L2_YCBCR_ENC_XV709:
2052 GST_FIXME ("XV709 not defined, assuming 709");
2054 case V4L2_YCBCR_ENC_709:
2055 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT709;
2057 case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
2058 GST_FIXME ("BT2020 with constant luma is not defined, assuming BT2020");
2060 case V4L2_YCBCR_ENC_BT2020:
2061 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT2020;
2063 case V4L2_YCBCR_ENC_SMPTE240M:
2064 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_SMPTE240M;
2066 case V4L2_YCBCR_ENC_DEFAULT:
2067 /* nothing, just use defaults for colorspace */
2070 GST_WARNING ("Unknown enum v4l2_ycbcr_encoding value %d", matrix);
2071 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_UNKNOWN;
2075 /* Set identity matrix for R'G'B' formats to avoid creating
2076 * confusion. This though is cosmetic as it's now properly ignored by
2077 * the video info API and videoconvert. */
2079 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_RGB;
2082 case V4L2_XFER_FUNC_709:
2083 if (colorspace == V4L2_COLORSPACE_BT2020 && fmt->fmt.pix.height >= 2160)
2084 cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12;
2086 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
2088 case V4L2_XFER_FUNC_SRGB:
2089 cinfo->transfer = GST_VIDEO_TRANSFER_SRGB;
2091 case V4L2_XFER_FUNC_ADOBERGB:
2092 cinfo->transfer = GST_VIDEO_TRANSFER_ADOBERGB;
2094 case V4L2_XFER_FUNC_SMPTE240M:
2095 cinfo->transfer = GST_VIDEO_TRANSFER_SMPTE240M;
2097 case V4L2_XFER_FUNC_NONE:
2098 cinfo->transfer = GST_VIDEO_TRANSFER_GAMMA10;
2100 case V4L2_XFER_FUNC_DEFAULT:
2101 /* nothing, just use defaults for colorspace */
2104 GST_WARNING ("Unknown enum v4l2_xfer_func value %d", transfer);
2105 cinfo->transfer = GST_VIDEO_TRANSFER_UNKNOWN;
2114 gst_v4l2_object_try_fmt (GstV4l2Object * v4l2object,
2115 struct v4l2_format *try_fmt)
2117 int fd = v4l2object->video_fd;
2118 struct v4l2_format fmt;
2121 memcpy (&fmt, try_fmt, sizeof (fmt));
2122 r = v4l2object->ioctl (fd, VIDIOC_TRY_FMT, &fmt);
2124 if (r < 0 && errno == ENOTTY) {
2125 /* The driver might not implement TRY_FMT, in which case we will try
2127 if (GST_V4L2_IS_ACTIVE (v4l2object))
2130 memcpy (&fmt, try_fmt, sizeof (fmt));
2131 r = v4l2object->ioctl (fd, VIDIOC_S_FMT, &fmt);
2133 memcpy (try_fmt, &fmt, sizeof (fmt));
2138 memcpy (try_fmt, &fmt, sizeof (fmt));
2139 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2140 "Unable to try format: %s", g_strerror (errno));
2146 gst_v4l2_object_add_interlace_mode (GstV4l2Object * v4l2object,
2147 GstStructure * s, guint32 width, guint32 height, guint32 pixelformat)
2149 struct v4l2_format fmt;
2150 GValue interlace_formats = { 0, };
2151 GstVideoInterlaceMode interlace_mode, prev = -1;
2153 const gchar *mode_strings[] = { "progressive",
2158 if (!g_str_equal (gst_structure_get_name (s), "video/x-raw"))
2161 if (v4l2object->never_interlaced) {
2162 gst_structure_set (s, "interlace-mode", G_TYPE_STRING, "progressive", NULL);
2166 g_value_init (&interlace_formats, GST_TYPE_LIST);
2168 /* Try twice - once for NONE, once for INTERLACED. */
2169 memset (&fmt, 0, sizeof (fmt));
2170 fmt.type = v4l2object->type;
2171 fmt.fmt.pix.width = width;
2172 fmt.fmt.pix.height = height;
2173 fmt.fmt.pix.pixelformat = pixelformat;
2174 fmt.fmt.pix.field = V4L2_FIELD_NONE;
2176 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0 &&
2177 gst_v4l2_object_get_interlace_mode (fmt.fmt.pix.field, &interlace_mode)) {
2178 GValue interlace_enum = { 0, };
2179 g_value_init (&interlace_enum, G_TYPE_STRING);
2180 g_value_set_string (&interlace_enum, mode_strings[interlace_mode]);
2181 gst_value_list_append_and_take_value (&interlace_formats, &interlace_enum);
2182 prev = interlace_mode;
2185 memset (&fmt, 0, sizeof (fmt));
2186 fmt.type = v4l2object->type;
2187 fmt.fmt.pix.width = width;
2188 fmt.fmt.pix.height = height;
2189 fmt.fmt.pix.pixelformat = pixelformat;
2190 fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
2192 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0 &&
2193 gst_v4l2_object_get_interlace_mode (fmt.fmt.pix.field, &interlace_mode) &&
2194 prev != interlace_mode) {
2195 GValue interlace_enum = { 0, };
2196 g_value_init (&interlace_enum, G_TYPE_STRING);
2197 g_value_set_string (&interlace_enum, mode_strings[interlace_mode]);
2198 gst_value_list_append_and_take_value (&interlace_formats, &interlace_enum);
2201 if (gst_v4l2src_value_simplify (&interlace_formats)
2202 || gst_value_list_get_size (&interlace_formats) > 0)
2203 gst_structure_take_value (s, "interlace-mode", &interlace_formats);
2205 GST_WARNING_OBJECT (v4l2object, "Failed to determine interlace mode");
2211 gst_v4l2_object_fill_colorimetry_list (GValue * list,
2212 GstVideoColorimetry * cinfo)
2214 GValue colorimetry = G_VALUE_INIT;
2217 gboolean found = FALSE;
2219 g_value_init (&colorimetry, G_TYPE_STRING);
2220 g_value_take_string (&colorimetry, gst_video_colorimetry_to_string (cinfo));
2222 /* only insert if no duplicate */
2223 size = gst_value_list_get_size (list);
2224 for (i = 0; i < size; i++) {
2227 tmp = gst_value_list_get_value (list, i);
2228 if (gst_value_compare (&colorimetry, tmp) == GST_VALUE_EQUAL) {
2235 gst_value_list_append_and_take_value (list, &colorimetry);
2237 g_value_unset (&colorimetry);
2241 gst_v4l2_object_add_colorspace (GstV4l2Object * v4l2object, GstStructure * s,
2242 guint32 width, guint32 height, guint32 pixelformat)
2244 struct v4l2_format fmt;
2245 GValue list = G_VALUE_INIT;
2246 GstVideoColorimetry cinfo;
2247 enum v4l2_colorspace req_cspace;
2249 memset (&fmt, 0, sizeof (fmt));
2250 fmt.type = v4l2object->type;
2251 fmt.fmt.pix.width = width;
2252 fmt.fmt.pix.height = height;
2253 fmt.fmt.pix.pixelformat = pixelformat;
2255 g_value_init (&list, GST_TYPE_LIST);
2257 /* step 1: get device default colorspace and insert it first as
2258 * it should be the preferred one */
2259 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0) {
2260 if (gst_v4l2_object_get_colorspace (&fmt, &cinfo))
2261 gst_v4l2_object_fill_colorimetry_list (&list, &cinfo);
2264 /* step 2: probe all colorspace other than default
2265 * We don't probe all colorspace, range, matrix and transfer combination to
2266 * avoid ioctl flooding which could greatly increase initialization time
2267 * with low-speed devices (UVC...) */
2268 for (req_cspace = V4L2_COLORSPACE_SMPTE170M;
2269 req_cspace <= V4L2_COLORSPACE_RAW; req_cspace++) {
2270 /* V4L2_COLORSPACE_BT878 is deprecated and shall not be used, so skip */
2271 if (req_cspace == V4L2_COLORSPACE_BT878)
2274 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
2275 fmt.fmt.pix_mp.colorspace = req_cspace;
2277 fmt.fmt.pix.colorspace = req_cspace;
2279 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0) {
2280 enum v4l2_colorspace colorspace;
2282 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
2283 colorspace = fmt.fmt.pix_mp.colorspace;
2285 colorspace = fmt.fmt.pix.colorspace;
2287 if (colorspace == req_cspace) {
2288 if (gst_v4l2_object_get_colorspace (&fmt, &cinfo))
2289 gst_v4l2_object_fill_colorimetry_list (&list, &cinfo);
2294 if (gst_value_list_get_size (&list) > 0)
2295 gst_structure_take_value (s, "colorimetry", &list);
2297 g_value_unset (&list);
2302 /* The frame interval enumeration code first appeared in Linux 2.6.19. */
2303 static GstStructure *
2304 gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
2305 guint32 pixelformat,
2306 guint32 width, guint32 height, const GstStructure * template)
2308 gint fd = v4l2object->video_fd;
2309 struct v4l2_frmivalenum ival;
2312 GValue rates = { 0, };
2314 memset (&ival, 0, sizeof (struct v4l2_frmivalenum));
2316 ival.pixel_format = pixelformat;
2318 ival.height = height;
2320 GST_LOG_OBJECT (v4l2object->dbg_obj,
2321 "get frame interval for %ux%u, %" GST_FOURCC_FORMAT, width, height,
2322 GST_FOURCC_ARGS (pixelformat));
2324 /* keep in mind that v4l2 gives us frame intervals (durations); we invert the
2325 * fraction to get framerate */
2326 if (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) < 0)
2327 goto enum_frameintervals_failed;
2329 if (ival.type == V4L2_FRMIVAL_TYPE_DISCRETE) {
2330 GValue rate = { 0, };
2332 g_value_init (&rates, GST_TYPE_LIST);
2333 g_value_init (&rate, GST_TYPE_FRACTION);
2336 num = ival.discrete.numerator;
2337 denom = ival.discrete.denominator;
2339 if (num > G_MAXINT || denom > G_MAXINT) {
2340 /* let us hope we don't get here... */
2345 GST_LOG_OBJECT (v4l2object->dbg_obj, "adding discrete framerate: %d/%d",
2348 /* swap to get the framerate */
2349 gst_value_set_fraction (&rate, denom, num);
2350 gst_value_list_append_value (&rates, &rate);
2353 } while (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) >= 0);
2354 } else if (ival.type == V4L2_FRMIVAL_TYPE_STEPWISE) {
2355 GValue min = { 0, };
2356 GValue step = { 0, };
2357 GValue max = { 0, };
2358 gboolean added = FALSE;
2359 guint32 minnum, mindenom;
2360 guint32 maxnum, maxdenom;
2362 g_value_init (&rates, GST_TYPE_LIST);
2364 g_value_init (&min, GST_TYPE_FRACTION);
2365 g_value_init (&step, GST_TYPE_FRACTION);
2366 g_value_init (&max, GST_TYPE_FRACTION);
2369 minnum = ival.stepwise.min.numerator;
2370 mindenom = ival.stepwise.min.denominator;
2371 if (minnum > G_MAXINT || mindenom > G_MAXINT) {
2375 GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise min frame interval: %d/%d",
2377 gst_value_set_fraction (&min, minnum, mindenom);
2380 maxnum = ival.stepwise.max.numerator;
2381 maxdenom = ival.stepwise.max.denominator;
2382 if (maxnum > G_MAXINT || maxdenom > G_MAXINT) {
2387 GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise max frame interval: %d/%d",
2389 gst_value_set_fraction (&max, maxnum, maxdenom);
2392 num = ival.stepwise.step.numerator;
2393 denom = ival.stepwise.step.denominator;
2394 if (num > G_MAXINT || denom > G_MAXINT) {
2399 if (num == 0 || denom == 0) {
2400 /* in this case we have a wrong fraction or no step, set the step to max
2401 * so that we only add the min value in the loop below */
2406 /* since we only have gst_value_fraction_subtract and not add, negate the
2408 GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise step frame interval: %d/%d",
2410 gst_value_set_fraction (&step, -num, denom);
2412 while (gst_value_compare (&min, &max) != GST_VALUE_GREATER_THAN) {
2413 GValue rate = { 0, };
2415 num = gst_value_get_fraction_numerator (&min);
2416 denom = gst_value_get_fraction_denominator (&min);
2417 GST_LOG_OBJECT (v4l2object->dbg_obj, "adding stepwise framerate: %d/%d",
2420 /* invert to get the framerate */
2421 g_value_init (&rate, GST_TYPE_FRACTION);
2422 gst_value_set_fraction (&rate, denom, num);
2423 gst_value_list_append_value (&rates, &rate);
2426 /* we're actually adding because step was negated above. This is because
2427 * there is no _add function... */
2428 if (!gst_value_fraction_subtract (&min, &min, &step)) {
2429 GST_WARNING_OBJECT (v4l2object->dbg_obj, "could not step fraction!");
2434 /* no range was added, leave the default range from the template */
2435 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2436 "no range added, leaving default");
2437 g_value_unset (&rates);
2439 } else if (ival.type == V4L2_FRMIVAL_TYPE_CONTINUOUS) {
2440 guint32 maxnum, maxdenom;
2442 g_value_init (&rates, GST_TYPE_FRACTION_RANGE);
2444 num = ival.stepwise.min.numerator;
2445 denom = ival.stepwise.min.denominator;
2446 if (num > G_MAXINT || denom > G_MAXINT) {
2451 maxnum = ival.stepwise.max.numerator;
2452 maxdenom = ival.stepwise.max.denominator;
2453 if (maxnum > G_MAXINT || maxdenom > G_MAXINT) {
2458 GST_LOG_OBJECT (v4l2object->dbg_obj,
2459 "continuous frame interval %d/%d to %d/%d", maxdenom, maxnum, denom,
2462 gst_value_set_fraction_range_full (&rates, maxdenom, maxnum, denom, num);
2468 s = gst_structure_copy (template);
2469 gst_structure_set (s, "width", G_TYPE_INT, (gint) width,
2470 "height", G_TYPE_INT, (gint) height, NULL);
2472 gst_v4l2_object_add_aspect_ratio (v4l2object, s);
2474 if (!v4l2object->skip_try_fmt_probes) {
2475 gst_v4l2_object_add_interlace_mode (v4l2object, s, width, height,
2477 gst_v4l2_object_add_colorspace (v4l2object, s, width, height, pixelformat);
2480 if (G_IS_VALUE (&rates)) {
2481 gst_v4l2src_value_simplify (&rates);
2482 /* only change the framerate on the template when we have a valid probed new
2484 gst_structure_take_value (s, "framerate", &rates);
2485 } else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2486 v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
2487 gst_structure_set (s, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT,
2493 enum_frameintervals_failed:
2495 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2496 "Unable to enumerate intervals for %" GST_FOURCC_FORMAT "@%ux%u",
2497 GST_FOURCC_ARGS (pixelformat), width, height);
2502 /* I don't see how this is actually an error, we ignore the format then */
2503 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2504 "Unknown frame interval type at %" GST_FOURCC_FORMAT "@%ux%u: %u",
2505 GST_FOURCC_ARGS (pixelformat), width, height, ival.type);
2511 sort_by_frame_size (GstStructure * s1, GstStructure * s2)
2515 gst_structure_get_int (s1, "width", &w1);
2516 gst_structure_get_int (s1, "height", &h1);
2517 gst_structure_get_int (s2, "width", &w2);
2518 gst_structure_get_int (s2, "height", &h2);
2520 /* I think it's safe to assume that this won't overflow for a while */
2521 return ((w2 * h2) - (w1 * h1));
2525 gst_v4l2_object_update_and_append (GstV4l2Object * v4l2object,
2526 guint32 format, GstCaps * caps, GstStructure * s)
2528 GstStructure *alt_s = NULL;
2530 /* Encoded stream on output buffer need to be parsed */
2531 if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
2532 v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
2535 for (; i < GST_V4L2_FORMAT_COUNT; i++) {
2536 if (format == gst_v4l2_formats[i].format &&
2537 gst_v4l2_formats[i].flags & GST_V4L2_CODEC &&
2538 !(gst_v4l2_formats[i].flags & GST_V4L2_NO_PARSE)) {
2539 gst_structure_set (s, "parsed", G_TYPE_BOOLEAN, TRUE, NULL);
2545 if (v4l2object->has_alpha_component &&
2546 (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2547 v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) {
2549 case V4L2_PIX_FMT_RGB32:
2550 alt_s = gst_structure_copy (s);
2551 gst_structure_set (alt_s, "format", G_TYPE_STRING, "ARGB", NULL);
2553 case V4L2_PIX_FMT_BGR32:
2554 alt_s = gst_structure_copy (s);
2555 gst_structure_set (alt_s, "format", G_TYPE_STRING, "BGRA", NULL);
2562 gst_caps_append_structure (caps, s);
2565 gst_caps_append_structure (caps, alt_s);
2569 gst_v4l2_object_probe_caps_for_format (GstV4l2Object * v4l2object,
2570 guint32 pixelformat, const GstStructure * template)
2572 GstCaps *ret = gst_caps_new_empty ();
2574 gint fd = v4l2object->video_fd;
2575 struct v4l2_frmsizeenum size;
2576 GList *results = NULL;
2579 if (pixelformat == GST_MAKE_FOURCC ('M', 'P', 'E', 'G')) {
2580 gst_caps_append_structure (ret, gst_structure_copy (template));
2584 memset (&size, 0, sizeof (struct v4l2_frmsizeenum));
2586 size.pixel_format = pixelformat;
2588 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2589 "Enumerating frame sizes for %" GST_FOURCC_FORMAT,
2590 GST_FOURCC_ARGS (pixelformat));
2592 if (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) < 0)
2593 goto enum_framesizes_failed;
2595 if (size.type == V4L2_FRMSIZE_TYPE_DISCRETE) {
2597 GST_LOG_OBJECT (v4l2object->dbg_obj, "got discrete frame size %dx%d",
2598 size.discrete.width, size.discrete.height);
2600 w = MIN (size.discrete.width, G_MAXINT);
2601 h = MIN (size.discrete.height, G_MAXINT);
2605 gst_v4l2_object_probe_caps_for_format_and_size (v4l2object,
2606 pixelformat, w, h, template);
2609 results = g_list_prepend (results, tmp);
2613 } while (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) >= 0);
2614 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2615 "done iterating discrete frame sizes");
2616 } else if (size.type == V4L2_FRMSIZE_TYPE_STEPWISE) {
2617 guint32 maxw, maxh, step_w, step_h;
2619 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "we have stepwise frame sizes:");
2620 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min width: %d",
2621 size.stepwise.min_width);
2622 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2623 size.stepwise.min_height);
2624 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "max width: %d",
2625 size.stepwise.max_width);
2626 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2627 size.stepwise.max_height);
2628 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "step width: %d",
2629 size.stepwise.step_width);
2630 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "step height: %d",
2631 size.stepwise.step_height);
2633 w = MAX (size.stepwise.min_width, 1);
2634 h = MAX (size.stepwise.min_height, 1);
2635 maxw = MIN (size.stepwise.max_width, G_MAXINT);
2636 maxh = MIN (size.stepwise.max_height, G_MAXINT);
2638 step_w = MAX (size.stepwise.step_width, 1);
2639 step_h = MAX (size.stepwise.step_height, 1);
2641 /* FIXME: check for sanity and that min/max are multiples of the steps */
2643 /* we only query details for the max width/height since it's likely the
2644 * most restricted if there are any resolution-dependent restrictions */
2645 tmp = gst_v4l2_object_probe_caps_for_format_and_size (v4l2object,
2646 pixelformat, maxw, maxh, template);
2649 GValue step_range = G_VALUE_INIT;
2651 g_value_init (&step_range, GST_TYPE_INT_RANGE);
2652 gst_value_set_int_range_step (&step_range, w, maxw, step_w);
2653 gst_structure_set_value (tmp, "width", &step_range);
2655 gst_value_set_int_range_step (&step_range, h, maxh, step_h);
2656 gst_structure_take_value (tmp, "height", &step_range);
2658 /* no point using the results list here, since there's only one struct */
2659 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
2661 } else if (size.type == V4L2_FRMSIZE_TYPE_CONTINUOUS) {
2664 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "we have continuous frame sizes:");
2665 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min width: %d",
2666 size.stepwise.min_width);
2667 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2668 size.stepwise.min_height);
2669 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "max width: %d",
2670 size.stepwise.max_width);
2671 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2672 size.stepwise.max_height);
2674 w = MAX (size.stepwise.min_width, 1);
2675 h = MAX (size.stepwise.min_height, 1);
2676 maxw = MIN (size.stepwise.max_width, G_MAXINT);
2677 maxh = MIN (size.stepwise.max_height, G_MAXINT);
2680 gst_v4l2_object_probe_caps_for_format_and_size (v4l2object, pixelformat,
2683 gst_structure_set (tmp, "width", GST_TYPE_INT_RANGE, (gint) w,
2684 (gint) maxw, "height", GST_TYPE_INT_RANGE, (gint) h, (gint) maxh,
2687 /* no point using the results list here, since there's only one struct */
2688 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
2694 /* we use an intermediary list to store and then sort the results of the
2695 * probing because we can't make any assumptions about the order in which
2696 * the driver will give us the sizes, but we want the final caps to contain
2697 * the results starting with the highest resolution and having the lowest
2698 * resolution last, since order in caps matters for things like fixation. */
2699 results = g_list_sort (results, (GCompareFunc) sort_by_frame_size);
2700 while (results != NULL) {
2701 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret,
2703 results = g_list_delete_link (results, results);
2706 if (gst_caps_is_empty (ret))
2707 goto enum_framesizes_no_results;
2712 enum_framesizes_failed:
2714 /* I don't see how this is actually an error */
2715 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2716 "Failed to enumerate frame sizes for pixelformat %" GST_FOURCC_FORMAT
2717 " (%s)", GST_FOURCC_ARGS (pixelformat), g_strerror (errno));
2718 goto default_frame_sizes;
2720 enum_framesizes_no_results:
2722 /* it's possible that VIDIOC_ENUM_FRAMESIZES is defined but the driver in
2723 * question doesn't actually support it yet */
2724 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2725 "No results for pixelformat %" GST_FOURCC_FORMAT
2726 " enumerating frame sizes, trying fallback",
2727 GST_FOURCC_ARGS (pixelformat));
2728 goto default_frame_sizes;
2732 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2733 "Unknown frame sizeenum type for pixelformat %" GST_FOURCC_FORMAT
2734 ": %u", GST_FOURCC_ARGS (pixelformat), size.type);
2735 goto default_frame_sizes;
2738 default_frame_sizes:
2740 gint min_w, max_w, min_h, max_h, fix_num = 0, fix_denom = 0;
2742 /* This code is for Linux < 2.6.19 */
2744 max_w = max_h = GST_V4L2_MAX_SIZE;
2745 if (!gst_v4l2_object_get_nearest_size (v4l2object, pixelformat, &min_w,
2747 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2748 "Could not probe minimum capture size for pixelformat %"
2749 GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
2751 if (!gst_v4l2_object_get_nearest_size (v4l2object, pixelformat, &max_w,
2753 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2754 "Could not probe maximum capture size for pixelformat %"
2755 GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
2758 /* Since we can't get framerate directly, try to use the current norm */
2759 if (v4l2object->tv_norm && v4l2object->norms) {
2761 GstTunerNorm *norm = NULL;
2762 GstTunerNorm *current =
2763 gst_v4l2_tuner_get_norm_by_std_id (v4l2object, v4l2object->tv_norm);
2765 for (norms = v4l2object->norms; norms != NULL; norms = norms->next) {
2766 norm = (GstTunerNorm *) norms->data;
2767 if (!strcmp (norm->label, current->label))
2770 /* If it's possible, set framerate to that (discrete) value */
2772 fix_num = gst_value_get_fraction_numerator (&norm->framerate);
2773 fix_denom = gst_value_get_fraction_denominator (&norm->framerate);
2777 tmp = gst_structure_copy (template);
2779 gst_structure_set (tmp, "framerate", GST_TYPE_FRACTION, fix_num,
2781 } else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2782 v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
2783 /* if norm can't be used, copy the template framerate */
2784 gst_structure_set (tmp, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
2789 gst_structure_set (tmp, "width", G_TYPE_INT, max_w, NULL);
2791 gst_structure_set (tmp, "width", GST_TYPE_INT_RANGE, min_w, max_w, NULL);
2794 gst_structure_set (tmp, "height", G_TYPE_INT, max_h, NULL);
2796 gst_structure_set (tmp, "height", GST_TYPE_INT_RANGE, min_h, max_h, NULL);
2798 gst_v4l2_object_add_aspect_ratio (v4l2object, tmp);
2800 if (!v4l2object->skip_try_fmt_probes) {
2801 /* We could consider setting interlace mode from min and max. */
2802 gst_v4l2_object_add_interlace_mode (v4l2object, tmp, max_w, max_h,
2804 /* We could consider to check colorspace for min too, in case it depends on
2805 * the size. But in this case, min and max could not be enough */
2806 gst_v4l2_object_add_colorspace (v4l2object, tmp, max_w, max_h,
2810 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
2816 gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
2817 guint32 pixelformat, gint * width, gint * height)
2819 struct v4l2_format fmt;
2820 gboolean ret = FALSE;
2821 GstVideoInterlaceMode interlace_mode;
2823 g_return_val_if_fail (width != NULL, FALSE);
2824 g_return_val_if_fail (height != NULL, FALSE);
2826 GST_LOG_OBJECT (v4l2object->dbg_obj,
2827 "getting nearest size to %dx%d with format %" GST_FOURCC_FORMAT,
2828 *width, *height, GST_FOURCC_ARGS (pixelformat));
2830 memset (&fmt, 0, sizeof (struct v4l2_format));
2832 /* get size delimiters */
2833 memset (&fmt, 0, sizeof (fmt));
2834 fmt.type = v4l2object->type;
2835 fmt.fmt.pix.width = *width;
2836 fmt.fmt.pix.height = *height;
2837 fmt.fmt.pix.pixelformat = pixelformat;
2838 fmt.fmt.pix.field = V4L2_FIELD_ANY;
2840 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) < 0)
2843 GST_LOG_OBJECT (v4l2object->dbg_obj,
2844 "got nearest size %dx%d", fmt.fmt.pix.width, fmt.fmt.pix.height);
2846 *width = fmt.fmt.pix.width;
2847 *height = fmt.fmt.pix.height;
2849 if (!gst_v4l2_object_get_interlace_mode (fmt.fmt.pix.field, &interlace_mode)) {
2850 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2851 "Unsupported field type for %" GST_FOURCC_FORMAT "@%ux%u: %u",
2852 GST_FOURCC_ARGS (pixelformat), *width, *height, fmt.fmt.pix.field);
2860 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2861 "Unable to try format: %s", g_strerror (errno));
2868 gst_v4l2_object_is_dmabuf_supported (GstV4l2Object * v4l2object)
2870 gboolean ret = TRUE;
2871 struct v4l2_exportbuffer expbuf = {
2872 .type = v4l2object->type,
2875 .flags = O_CLOEXEC | O_RDWR,
2878 if (v4l2object->fmtdesc->flags & V4L2_FMT_FLAG_EMULATED) {
2879 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2880 "libv4l2 converter detected, disabling DMABuf");
2884 /* Expected to fail, but ENOTTY tells us that it is not implemented. */
2885 v4l2object->ioctl (v4l2object->video_fd, VIDIOC_EXPBUF, &expbuf);
2886 if (errno == ENOTTY)
2893 gst_v4l2_object_setup_pool (GstV4l2Object * v4l2object, GstCaps * caps)
2897 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "initializing the %s system",
2898 V4L2_TYPE_IS_OUTPUT (v4l2object->type) ? "output" : "capture");
2900 GST_V4L2_CHECK_OPEN (v4l2object);
2901 GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
2903 /* find transport */
2904 mode = v4l2object->req_mode;
2906 if (v4l2object->device_caps & V4L2_CAP_READWRITE) {
2907 if (v4l2object->req_mode == GST_V4L2_IO_AUTO)
2908 mode = GST_V4L2_IO_RW;
2909 } else if (v4l2object->req_mode == GST_V4L2_IO_RW)
2910 goto method_not_supported;
2912 if (v4l2object->device_caps & V4L2_CAP_STREAMING) {
2913 if (v4l2object->req_mode == GST_V4L2_IO_AUTO) {
2914 if (!V4L2_TYPE_IS_OUTPUT (v4l2object->type) &&
2915 gst_v4l2_object_is_dmabuf_supported (v4l2object)) {
2916 mode = GST_V4L2_IO_DMABUF;
2918 mode = GST_V4L2_IO_MMAP;
2921 } else if (v4l2object->req_mode == GST_V4L2_IO_MMAP)
2922 goto method_not_supported;
2924 /* if still no transport selected, error out */
2925 if (mode == GST_V4L2_IO_AUTO)
2926 goto no_supported_capture_method;
2928 GST_INFO_OBJECT (v4l2object->dbg_obj, "accessing buffers via mode %d", mode);
2929 v4l2object->mode = mode;
2931 /* If min_buffers is not set, the driver either does not support the control or
2932 it has not been asked yet via propose_allocation/decide_allocation. */
2933 if (!v4l2object->min_buffers)
2934 gst_v4l2_get_driver_min_buffers (v4l2object);
2936 /* Map the buffers */
2937 GST_LOG_OBJECT (v4l2object->dbg_obj, "initiating buffer pool");
2939 if (!(v4l2object->pool = gst_v4l2_buffer_pool_new (v4l2object, caps)))
2940 goto buffer_pool_new_failed;
2942 GST_V4L2_SET_ACTIVE (v4l2object);
2947 buffer_pool_new_failed:
2949 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
2950 (_("Could not map buffers from device '%s'"),
2951 v4l2object->videodev),
2952 ("Failed to create buffer pool: %s", g_strerror (errno)));
2955 method_not_supported:
2957 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
2958 (_("The driver of device '%s' does not support the IO method %d"),
2959 v4l2object->videodev, mode), (NULL));
2962 no_supported_capture_method:
2964 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
2965 (_("The driver of device '%s' does not support any known IO "
2966 "method."), v4l2object->videodev), (NULL));
2972 gst_v4l2_object_set_stride (GstVideoInfo * info, GstVideoAlignment * align,
2973 gint plane, gint stride)
2975 const GstVideoFormatInfo *finfo = info->finfo;
2977 if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
2978 gint x_tiles, y_tiles, ws, hs, tile_height, padded_height;
2981 ws = GST_VIDEO_FORMAT_INFO_TILE_WS (finfo);
2982 hs = GST_VIDEO_FORMAT_INFO_TILE_HS (finfo);
2983 tile_height = 1 << hs;
2985 padded_height = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, plane,
2986 info->height + align->padding_top + align->padding_bottom);
2987 padded_height = GST_ROUND_UP_N (padded_height, tile_height);
2989 x_tiles = stride >> ws;
2990 y_tiles = padded_height >> hs;
2991 info->stride[plane] = GST_VIDEO_TILE_MAKE_STRIDE (x_tiles, y_tiles);
2993 info->stride[plane] = stride;
2998 gst_v4l2_object_extrapolate_info (GstV4l2Object * v4l2object,
2999 GstVideoInfo * info, GstVideoAlignment * align, gint stride)
3001 const GstVideoFormatInfo *finfo = info->finfo;
3002 gint i, estride, padded_height;
3005 g_return_if_fail (v4l2object->n_v4l2_planes == 1);
3007 padded_height = info->height + align->padding_top + align->padding_bottom;
3009 for (i = 0; i < finfo->n_planes; i++) {
3010 estride = gst_v4l2_object_extrapolate_stride (finfo, i, stride);
3012 gst_v4l2_object_set_stride (info, align, i, estride);
3014 info->offset[i] = offs;
3016 GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, i, padded_height);
3018 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
3019 "Extrapolated for plane %d with base stride %d: "
3020 "stride %d, offset %" G_GSIZE_FORMAT, i, stride, info->stride[i],
3024 /* Update the image size according the amount of data we are going to
3025 * read/write. This workaround bugs in driver where the sizeimage provided
3026 * by TRY/S_FMT represent the buffer length (maximum size) rather then the expected
3027 * bytesused (buffer size). */
3028 if (offs < info->size)
3033 gst_v4l2_object_save_format (GstV4l2Object * v4l2object,
3034 struct v4l2_fmtdesc *fmtdesc, struct v4l2_format *format,
3035 GstVideoInfo * info, GstVideoAlignment * align)
3037 const GstVideoFormatInfo *finfo = info->finfo;
3038 gboolean standard_stride = TRUE;
3039 gint stride, pstride, padded_width, padded_height, i;
3041 if (GST_VIDEO_INFO_FORMAT (info) == GST_VIDEO_FORMAT_ENCODED) {
3042 v4l2object->n_v4l2_planes = 1;
3043 info->size = format->fmt.pix.sizeimage;
3047 /* adjust right padding */
3048 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
3049 stride = format->fmt.pix_mp.plane_fmt[0].bytesperline;
3051 stride = format->fmt.pix.bytesperline;
3053 pstride = GST_VIDEO_FORMAT_INFO_PSTRIDE (finfo, 0);
3055 padded_width = stride / pstride;
3057 /* pstride can be 0 for complex formats */
3058 GST_WARNING_OBJECT (v4l2object->element,
3059 "format %s has a pstride of 0, cannot compute padded with",
3060 gst_video_format_to_string (GST_VIDEO_INFO_FORMAT (info)));
3061 padded_width = stride;
3064 if (padded_width < format->fmt.pix.width)
3065 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3066 "Driver bug detected, stride (%d) is too small for the width (%d)",
3067 padded_width, format->fmt.pix.width);
3069 align->padding_right = padded_width - info->width - align->padding_left;
3071 /* adjust bottom padding */
3072 padded_height = format->fmt.pix.height;
3074 if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
3075 guint hs, tile_height;
3077 hs = GST_VIDEO_FORMAT_INFO_TILE_HS (finfo);
3078 tile_height = 1 << hs;
3080 padded_height = GST_ROUND_UP_N (padded_height, tile_height);
3083 align->padding_bottom = padded_height - info->height - align->padding_top;
3085 /* setup the strides and offset */
3086 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type)) {
3087 struct v4l2_pix_format_mplane *pix_mp = &format->fmt.pix_mp;
3089 /* figure out the frame layout */
3090 v4l2object->n_v4l2_planes = MAX (1, pix_mp->num_planes);
3092 for (i = 0; i < v4l2object->n_v4l2_planes; i++) {
3093 stride = pix_mp->plane_fmt[i].bytesperline;
3095 if (info->stride[i] != stride)
3096 standard_stride = FALSE;
3098 gst_v4l2_object_set_stride (info, align, i, stride);
3099 info->offset[i] = info->size;
3100 info->size += pix_mp->plane_fmt[i].sizeimage;
3103 /* Extrapolate stride if planar format are being set in 1 v4l2 plane */
3104 if (v4l2object->n_v4l2_planes < finfo->n_planes) {
3105 stride = format->fmt.pix_mp.plane_fmt[0].bytesperline;
3106 gst_v4l2_object_extrapolate_info (v4l2object, info, align, stride);
3109 /* only one plane in non-MPLANE mode */
3110 v4l2object->n_v4l2_planes = 1;
3111 info->size = format->fmt.pix.sizeimage;
3112 stride = format->fmt.pix.bytesperline;
3114 if (info->stride[0] != stride)
3115 standard_stride = FALSE;
3117 gst_v4l2_object_extrapolate_info (v4l2object, info, align, stride);
3120 /* adjust the offset to take into account left and top */
3121 if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
3122 if ((align->padding_left + align->padding_top) > 0)
3123 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3124 "Left and top padding is not permitted for tiled formats");
3126 for (i = 0; i < finfo->n_planes; i++) {
3129 /* FIXME we assume plane as component as this is true for all supported
3130 * format we support. */
3132 hedge = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, i, align->padding_left);
3133 vedge = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, i, align->padding_top);
3135 info->offset[i] += (vedge * info->stride[i]) +
3136 (hedge * GST_VIDEO_INFO_COMP_PSTRIDE (info, i));
3141 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got sizeimage %" G_GSIZE_FORMAT,
3144 /* to avoid copies we need video meta if there is padding */
3145 v4l2object->need_video_meta =
3146 ((align->padding_top + align->padding_left + align->padding_right +
3147 align->padding_bottom) != 0);
3149 /* ... or if stride is non "standard" */
3150 if (!standard_stride)
3151 v4l2object->need_video_meta = TRUE;
3153 /* ... or also video meta if we use multiple, non-contiguous, planes */
3154 if (v4l2object->n_v4l2_planes > 1)
3155 v4l2object->need_video_meta = TRUE;
3157 v4l2object->info = *info;
3158 v4l2object->align = *align;
3159 v4l2object->format = *format;
3160 v4l2object->fmtdesc = fmtdesc;
3162 /* if we have a framerate pre-calculate duration */
3163 if (info->fps_n > 0 && info->fps_d > 0) {
3164 v4l2object->duration = gst_util_uint64_scale_int (GST_SECOND, info->fps_d,
3167 v4l2object->duration = GST_CLOCK_TIME_NONE;
3172 gst_v4l2_object_extrapolate_stride (const GstVideoFormatInfo * finfo,
3173 gint plane, gint stride)
3177 switch (finfo->format) {
3178 case GST_VIDEO_FORMAT_NV12:
3179 case GST_VIDEO_FORMAT_NV12_64Z32:
3180 case GST_VIDEO_FORMAT_NV21:
3181 case GST_VIDEO_FORMAT_NV16:
3182 case GST_VIDEO_FORMAT_NV61:
3183 case GST_VIDEO_FORMAT_NV24:
3184 estride = (plane == 0 ? 1 : 2) *
3185 GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, plane, stride);
3188 estride = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, plane, stride);
3196 gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
3197 gboolean try_only, GstV4l2Error * error)
3199 gint fd = v4l2object->video_fd;
3200 struct v4l2_format format;
3201 struct v4l2_streamparm streamparm;
3202 enum v4l2_field field;
3203 guint32 pixelformat;
3204 struct v4l2_fmtdesc *fmtdesc;
3206 GstVideoAlignment align;
3207 gint width, height, fps_n, fps_d;
3211 enum v4l2_colorspace colorspace = 0;
3212 enum v4l2_quantization range = 0;
3213 enum v4l2_ycbcr_encoding matrix = 0;
3214 enum v4l2_xfer_func transfer = 0;
3217 g_return_val_if_fail (!v4l2object->skip_try_fmt_probes ||
3218 gst_caps_is_writable (caps), FALSE);
3220 GST_V4L2_CHECK_OPEN (v4l2object);
3222 GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
3224 is_mplane = V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type);
3226 gst_video_info_init (&info);
3227 gst_video_alignment_reset (&align);
3229 if (!gst_v4l2_object_get_caps_info (v4l2object, caps, &fmtdesc, &info))
3232 pixelformat = fmtdesc->pixelformat;
3233 width = GST_VIDEO_INFO_WIDTH (&info);
3234 height = GST_VIDEO_INFO_HEIGHT (&info);
3235 fps_n = GST_VIDEO_INFO_FPS_N (&info);
3236 fps_d = GST_VIDEO_INFO_FPS_D (&info);
3238 /* if encoded format (GST_VIDEO_INFO_N_PLANES return 0)
3239 * or if contiguous is prefered */
3240 n_v4l_planes = GST_VIDEO_INFO_N_PLANES (&info);
3241 if (!n_v4l_planes || !v4l2object->prefered_non_contiguous)
3244 if (GST_VIDEO_INFO_IS_INTERLACED (&info)) {
3245 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "interlaced video");
3246 /* ideally we would differentiate between types of interlaced video
3247 * but there is not sufficient information in the caps..
3249 field = V4L2_FIELD_INTERLACED;
3251 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "progressive video");
3252 field = V4L2_FIELD_NONE;
3255 /* We first pick th main colorspace from the primaries */
3256 switch (info.colorimetry.primaries) {
3257 case GST_VIDEO_COLOR_PRIMARIES_BT709:
3258 /* There is two colorspaces using these primaries, use the range to
3260 if (info.colorimetry.range == GST_VIDEO_COLOR_RANGE_16_235)
3261 colorspace = V4L2_COLORSPACE_REC709;
3263 colorspace = V4L2_COLORSPACE_SRGB;
3265 case GST_VIDEO_COLOR_PRIMARIES_BT2020:
3266 colorspace = V4L2_COLORSPACE_BT2020;
3268 case GST_VIDEO_COLOR_PRIMARIES_BT470M:
3269 colorspace = V4L2_COLORSPACE_470_SYSTEM_M;
3271 case GST_VIDEO_COLOR_PRIMARIES_BT470BG:
3272 colorspace = V4L2_COLORSPACE_470_SYSTEM_BG;
3274 case GST_VIDEO_COLOR_PRIMARIES_SMPTE170M:
3275 colorspace = V4L2_COLORSPACE_SMPTE170M;
3277 case GST_VIDEO_COLOR_PRIMARIES_SMPTE240M:
3278 colorspace = V4L2_COLORSPACE_SMPTE240M;
3281 case GST_VIDEO_COLOR_PRIMARIES_FILM:
3282 case GST_VIDEO_COLOR_PRIMARIES_UNKNOWN:
3283 /* We don't know, we will guess */
3287 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3288 "Unknown colorimetry primaries %d", info.colorimetry.primaries);
3292 switch (info.colorimetry.range) {
3293 case GST_VIDEO_COLOR_RANGE_0_255:
3294 range = V4L2_QUANTIZATION_FULL_RANGE;
3296 case GST_VIDEO_COLOR_RANGE_16_235:
3297 range = V4L2_QUANTIZATION_LIM_RANGE;
3299 case GST_VIDEO_COLOR_RANGE_UNKNOWN:
3300 /* We let the driver pick a default one */
3303 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3304 "Unknown colorimetry range %d", info.colorimetry.range);
3308 switch (info.colorimetry.matrix) {
3309 case GST_VIDEO_COLOR_MATRIX_RGB:
3310 /* Unspecified, leave to default */
3312 /* FCC is about the same as BT601 with less digit */
3313 case GST_VIDEO_COLOR_MATRIX_FCC:
3314 case GST_VIDEO_COLOR_MATRIX_BT601:
3315 matrix = V4L2_YCBCR_ENC_601;
3317 case GST_VIDEO_COLOR_MATRIX_BT709:
3318 matrix = V4L2_YCBCR_ENC_709;
3320 case GST_VIDEO_COLOR_MATRIX_SMPTE240M:
3321 matrix = V4L2_YCBCR_ENC_SMPTE240M;
3323 case GST_VIDEO_COLOR_MATRIX_BT2020:
3324 matrix = V4L2_YCBCR_ENC_BT2020;
3326 case GST_VIDEO_COLOR_MATRIX_UNKNOWN:
3327 /* We let the driver pick a default one */
3330 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3331 "Unknown colorimetry matrix %d", info.colorimetry.matrix);
3335 switch (info.colorimetry.transfer) {
3336 case GST_VIDEO_TRANSFER_GAMMA18:
3337 case GST_VIDEO_TRANSFER_GAMMA20:
3338 case GST_VIDEO_TRANSFER_GAMMA22:
3339 case GST_VIDEO_TRANSFER_GAMMA28:
3340 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3341 "GAMMA 18, 20, 22, 28 transfer functions not supported");
3343 case GST_VIDEO_TRANSFER_GAMMA10:
3344 transfer = V4L2_XFER_FUNC_NONE;
3346 case GST_VIDEO_TRANSFER_BT2020_12:
3347 case GST_VIDEO_TRANSFER_BT709:
3348 transfer = V4L2_XFER_FUNC_709;
3350 case GST_VIDEO_TRANSFER_SMPTE240M:
3351 transfer = V4L2_XFER_FUNC_SMPTE240M;
3353 case GST_VIDEO_TRANSFER_SRGB:
3354 transfer = V4L2_XFER_FUNC_SRGB;
3356 case GST_VIDEO_TRANSFER_LOG100:
3357 case GST_VIDEO_TRANSFER_LOG316:
3358 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3359 "LOG 100, 316 transfer functions not supported");
3360 /* FIXME No known sensible default, maybe AdobeRGB ? */
3362 case GST_VIDEO_TRANSFER_UNKNOWN:
3363 /* We let the driver pick a default one */
3366 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3367 "Unknown colorimetry tranfer %d", info.colorimetry.transfer);
3371 if (colorspace == 0) {
3372 /* Try to guess colorspace according to pixelformat and size */
3373 if (GST_VIDEO_INFO_IS_YUV (&info)) {
3374 /* SD streams likely use SMPTE170M and HD streams REC709 */
3375 if (width <= 720 && height <= 576)
3376 colorspace = V4L2_COLORSPACE_SMPTE170M;
3378 colorspace = V4L2_COLORSPACE_REC709;
3379 } else if (GST_VIDEO_INFO_IS_RGB (&info)) {
3380 colorspace = V4L2_COLORSPACE_SRGB;
3381 transfer = V4L2_XFER_FUNC_NONE;
3385 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired format %dx%d, format "
3386 "%" GST_FOURCC_FORMAT " stride: %d", width, height,
3387 GST_FOURCC_ARGS (pixelformat), GST_VIDEO_INFO_PLANE_STRIDE (&info, 0));
3389 memset (&format, 0x00, sizeof (struct v4l2_format));
3390 format.type = v4l2object->type;
3393 format.type = v4l2object->type;
3394 format.fmt.pix_mp.pixelformat = pixelformat;
3395 format.fmt.pix_mp.width = width;
3396 format.fmt.pix_mp.height = height;
3397 format.fmt.pix_mp.field = field;
3398 format.fmt.pix_mp.num_planes = n_v4l_planes;
3400 /* try to ask our prefered stride but it's not a failure if not
3402 for (i = 0; i < n_v4l_planes; i++) {
3403 gint stride = GST_VIDEO_INFO_PLANE_STRIDE (&info, i);
3405 if (GST_VIDEO_FORMAT_INFO_IS_TILED (info.finfo))
3406 stride = GST_VIDEO_TILE_X_TILES (stride) <<
3407 GST_VIDEO_FORMAT_INFO_TILE_WS (info.finfo);
3409 format.fmt.pix_mp.plane_fmt[i].bytesperline = stride;
3412 if (GST_VIDEO_INFO_FORMAT (&info) == GST_VIDEO_FORMAT_ENCODED)
3413 format.fmt.pix_mp.plane_fmt[0].sizeimage = ENCODED_BUFFER_SIZE;
3415 gint stride = GST_VIDEO_INFO_PLANE_STRIDE (&info, 0);
3417 format.type = v4l2object->type;
3419 format.fmt.pix.width = width;
3420 format.fmt.pix.height = height;
3421 format.fmt.pix.pixelformat = pixelformat;
3422 format.fmt.pix.field = field;
3424 if (GST_VIDEO_FORMAT_INFO_IS_TILED (info.finfo))
3425 stride = GST_VIDEO_TILE_X_TILES (stride) <<
3426 GST_VIDEO_FORMAT_INFO_TILE_WS (info.finfo);
3428 /* try to ask our prefered stride */
3429 format.fmt.pix.bytesperline = stride;
3431 if (GST_VIDEO_INFO_FORMAT (&info) == GST_VIDEO_FORMAT_ENCODED)
3432 format.fmt.pix.sizeimage = ENCODED_BUFFER_SIZE;
3435 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired format is %dx%d, format "
3436 "%" GST_FOURCC_FORMAT ", nb planes %d", format.fmt.pix.width,
3437 format.fmt.pix_mp.height,
3438 GST_FOURCC_ARGS (format.fmt.pix.pixelformat),
3439 is_mplane ? format.fmt.pix_mp.num_planes : 1);
3441 #ifndef GST_DISABLE_GST_DEBUG
3443 for (i = 0; i < format.fmt.pix_mp.num_planes; i++)
3444 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d",
3445 format.fmt.pix_mp.plane_fmt[i].bytesperline);
3447 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d",
3448 format.fmt.pix.bytesperline);
3453 format.fmt.pix_mp.colorspace = colorspace;
3454 format.fmt.pix_mp.quantization = range;
3455 format.fmt.pix_mp.ycbcr_enc = matrix;
3456 format.fmt.pix_mp.xfer_func = transfer;
3458 format.fmt.pix.colorspace = colorspace;
3459 format.fmt.pix.quantization = range;
3460 format.fmt.pix.ycbcr_enc = matrix;
3461 format.fmt.pix.xfer_func = transfer;
3464 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired colorspace is %d:%d:%d:%d",
3465 colorspace, range, matrix, transfer);
3468 if (v4l2object->ioctl (fd, VIDIOC_TRY_FMT, &format) < 0)
3469 goto try_fmt_failed;
3471 if (v4l2object->ioctl (fd, VIDIOC_S_FMT, &format) < 0)
3472 goto set_fmt_failed;
3475 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got format of %dx%d, format "
3476 "%" GST_FOURCC_FORMAT ", nb planes %d, colorspace %d",
3477 format.fmt.pix.width, format.fmt.pix_mp.height,
3478 GST_FOURCC_ARGS (format.fmt.pix.pixelformat),
3479 is_mplane ? format.fmt.pix_mp.num_planes : 1,
3480 is_mplane ? format.fmt.pix_mp.colorspace : format.fmt.pix.colorspace);
3482 #ifndef GST_DISABLE_GST_DEBUG
3484 for (i = 0; i < format.fmt.pix_mp.num_planes; i++)
3485 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d, sizeimage %d",
3486 format.fmt.pix_mp.plane_fmt[i].bytesperline,
3487 format.fmt.pix_mp.plane_fmt[i].sizeimage);
3489 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d, sizeimage %d",
3490 format.fmt.pix.bytesperline, format.fmt.pix.sizeimage);
3494 if (format.fmt.pix.pixelformat != pixelformat)
3495 goto invalid_pixelformat;
3497 /* Only negotiate size with raw data.
3498 * For some codecs the dimensions are *not* in the bitstream, IIRC VC1
3499 * in ASF mode for example, there is also not reason for a driver to
3500 * change the size. */
3501 if (info.finfo->format != GST_VIDEO_FORMAT_ENCODED) {
3502 /* We can crop larger images */
3503 if (format.fmt.pix.width < width || format.fmt.pix.height < height)
3504 goto invalid_dimensions;
3506 /* Note, this will be adjusted if upstream has non-centered cropping. */
3507 align.padding_top = 0;
3508 align.padding_bottom = format.fmt.pix.height - height;
3509 align.padding_left = 0;
3510 align.padding_right = format.fmt.pix.width - width;
3513 if (is_mplane && format.fmt.pix_mp.num_planes != n_v4l_planes)
3514 goto invalid_planes;
3516 if ((is_mplane && format.fmt.pix_mp.field != field)
3517 || format.fmt.pix.field != field)
3520 gst_v4l2_object_get_colorspace (&format, &info.colorimetry);
3522 s = gst_caps_get_structure (caps, 0);
3523 if (gst_structure_has_field (s, "colorimetry")) {
3524 GstVideoColorimetry ci;
3525 if (!gst_video_colorimetry_from_string (&ci,
3526 gst_structure_get_string (s, "colorimetry"))
3527 || !gst_video_colorimetry_is_equal (&ci, &info.colorimetry))
3528 goto invalid_colorimetry;
3531 /* In case we have skipped the try_fmt probes, we'll need to set the
3532 * colorimetry and interlace-mode back into the caps. */
3533 if (v4l2object->skip_try_fmt_probes) {
3534 if (!gst_structure_has_field (s, "colorimetry")) {
3535 gchar *str = gst_video_colorimetry_to_string (&info.colorimetry);
3536 gst_structure_set (s, "colorimetry", G_TYPE_STRING, str, NULL);
3540 if (!gst_structure_has_field (s, "interlace-mode"))
3541 gst_structure_set (s, "interlace-mode", G_TYPE_STRING,
3542 gst_video_interlace_mode_to_string (info.interlace_mode), NULL);
3545 if (try_only) /* good enough for trying only */
3548 if (GST_VIDEO_INFO_HAS_ALPHA (&info)) {
3549 struct v4l2_control ctl = { 0, };
3550 ctl.id = V4L2_CID_ALPHA_COMPONENT;
3553 if (v4l2object->ioctl (fd, VIDIOC_S_CTRL, &ctl) < 0)
3554 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3555 "Failed to set alpha component value");
3558 /* Is there a reason we require the caller to always specify a framerate? */
3559 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired framerate: %u/%u", fps_n,
3562 memset (&streamparm, 0x00, sizeof (struct v4l2_streamparm));
3563 streamparm.type = v4l2object->type;
3565 if (v4l2object->ioctl (fd, VIDIOC_G_PARM, &streamparm) < 0)
3566 goto get_parm_failed;
3568 if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE
3569 || v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
3570 GST_VIDEO_INFO_FPS_N (&info) =
3571 streamparm.parm.capture.timeperframe.denominator;
3572 GST_VIDEO_INFO_FPS_D (&info) =
3573 streamparm.parm.capture.timeperframe.numerator;
3575 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got capture framerate: %u/%u",
3576 streamparm.parm.capture.timeperframe.denominator,
3577 streamparm.parm.capture.timeperframe.numerator);
3579 /* We used to skip frame rate setup if the camera was already setup
3580 * with the requested frame rate. This breaks some cameras though,
3581 * causing them to not output data (several models of Thinkpad cameras
3582 * have this problem at least).
3583 * So, don't skip. */
3584 GST_LOG_OBJECT (v4l2object->dbg_obj, "Setting capture framerate to %u/%u",
3586 /* We want to change the frame rate, so check whether we can. Some cheap USB
3587 * cameras don't have the capability */
3588 if ((streamparm.parm.capture.capability & V4L2_CAP_TIMEPERFRAME) == 0) {
3589 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
3590 "Not setting capture framerate (not supported)");
3594 /* Note: V4L2 wants the frame interval, we have the frame rate */
3595 streamparm.parm.capture.timeperframe.numerator = fps_d;
3596 streamparm.parm.capture.timeperframe.denominator = fps_n;
3598 /* some cheap USB cam's won't accept any change */
3599 if (v4l2object->ioctl (fd, VIDIOC_S_PARM, &streamparm) < 0)
3600 goto set_parm_failed;
3602 if (streamparm.parm.capture.timeperframe.numerator > 0 &&
3603 streamparm.parm.capture.timeperframe.denominator > 0) {
3604 /* get new values */
3605 fps_d = streamparm.parm.capture.timeperframe.numerator;
3606 fps_n = streamparm.parm.capture.timeperframe.denominator;
3608 GST_INFO_OBJECT (v4l2object->dbg_obj, "Set capture framerate to %u/%u",
3611 /* fix v4l2 capture driver to provide framerate values */
3612 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3613 "Reuse caps framerate %u/%u - fix v4l2 capture driver", fps_n, fps_d);
3616 GST_VIDEO_INFO_FPS_N (&info) = fps_n;
3617 GST_VIDEO_INFO_FPS_D (&info) = fps_d;
3618 } else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT
3619 || v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
3620 GST_VIDEO_INFO_FPS_N (&info) =
3621 streamparm.parm.output.timeperframe.denominator;
3622 GST_VIDEO_INFO_FPS_D (&info) =
3623 streamparm.parm.output.timeperframe.numerator;
3625 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got output framerate: %u/%u",
3626 streamparm.parm.output.timeperframe.denominator,
3627 streamparm.parm.output.timeperframe.numerator);
3629 GST_LOG_OBJECT (v4l2object->dbg_obj, "Setting output framerate to %u/%u",
3631 if ((streamparm.parm.output.capability & V4L2_CAP_TIMEPERFRAME) == 0) {
3632 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
3633 "Not setting output framerate (not supported)");
3637 /* Note: V4L2 wants the frame interval, we have the frame rate */
3638 streamparm.parm.output.timeperframe.numerator = fps_d;
3639 streamparm.parm.output.timeperframe.denominator = fps_n;
3641 if (v4l2object->ioctl (fd, VIDIOC_S_PARM, &streamparm) < 0)
3642 goto set_parm_failed;
3644 if (streamparm.parm.output.timeperframe.numerator > 0 &&
3645 streamparm.parm.output.timeperframe.denominator > 0) {
3646 /* get new values */
3647 fps_d = streamparm.parm.output.timeperframe.numerator;
3648 fps_n = streamparm.parm.output.timeperframe.denominator;
3650 GST_INFO_OBJECT (v4l2object->dbg_obj, "Set output framerate to %u/%u",
3653 /* fix v4l2 output driver to provide framerate values */
3654 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3655 "Reuse caps framerate %u/%u - fix v4l2 output driver", fps_n, fps_d);
3658 GST_VIDEO_INFO_FPS_N (&info) = fps_n;
3659 GST_VIDEO_INFO_FPS_D (&info) = fps_d;
3663 /* add boolean return, so we can fail on drivers bugs */
3664 gst_v4l2_object_save_format (v4l2object, fmtdesc, &format, &info, &align);
3666 /* now configure the pool */
3667 if (!gst_v4l2_object_setup_pool (v4l2object, caps))
3675 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "can't parse caps %" GST_PTR_FORMAT,
3681 if (errno == EINVAL) {
3682 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3683 (_("Device '%s' has no supported format"), v4l2object->videodev),
3684 ("Call to TRY_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
3685 GST_FOURCC_ARGS (pixelformat), width, height,
3686 g_strerror (errno)));
3688 GST_V4L2_ERROR (error, RESOURCE, FAILED,
3689 (_("Device '%s' failed during initialization"),
3690 v4l2object->videodev),
3691 ("Call to TRY_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
3692 GST_FOURCC_ARGS (pixelformat), width, height,
3693 g_strerror (errno)));
3699 if (errno == EBUSY) {
3700 GST_V4L2_ERROR (error, RESOURCE, BUSY,
3701 (_("Device '%s' is busy"), v4l2object->videodev),
3702 ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
3703 GST_FOURCC_ARGS (pixelformat), width, height,
3704 g_strerror (errno)));
3705 } else if (errno == EINVAL) {
3706 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3707 (_("Device '%s' has no supported format"), v4l2object->videodev),
3708 ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
3709 GST_FOURCC_ARGS (pixelformat), width, height,
3710 g_strerror (errno)));
3712 GST_V4L2_ERROR (error, RESOURCE, FAILED,
3713 (_("Device '%s' failed during initialization"),
3714 v4l2object->videodev),
3715 ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
3716 GST_FOURCC_ARGS (pixelformat), width, height,
3717 g_strerror (errno)));
3723 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3724 (_("Device '%s' cannot capture at %dx%d"),
3725 v4l2object->videodev, width, height),
3726 ("Tried to capture at %dx%d, but device returned size %dx%d",
3727 width, height, format.fmt.pix.width, format.fmt.pix.height));
3730 invalid_pixelformat:
3732 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3733 (_("Device '%s' cannot capture in the specified format"),
3734 v4l2object->videodev),
3735 ("Tried to capture in %" GST_FOURCC_FORMAT
3736 ", but device returned format" " %" GST_FOURCC_FORMAT,
3737 GST_FOURCC_ARGS (pixelformat),
3738 GST_FOURCC_ARGS (format.fmt.pix.pixelformat)));
3743 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3744 (_("Device '%s' does support non-contiguous planes"),
3745 v4l2object->videodev),
3746 ("Device wants %d planes", format.fmt.pix_mp.num_planes));
3751 enum v4l2_field wanted_field;
3754 wanted_field = format.fmt.pix_mp.field;
3756 wanted_field = format.fmt.pix.field;
3758 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3759 (_("Device '%s' does not support %s interlacing"),
3760 v4l2object->videodev,
3761 field == V4L2_FIELD_NONE ? "progressive" : "interleaved"),
3762 ("Device wants %s interlacing",
3763 wanted_field == V4L2_FIELD_NONE ? "progressive" : "interleaved"));
3766 invalid_colorimetry:
3768 gchar *wanted_colorimetry;
3770 wanted_colorimetry = gst_video_colorimetry_to_string (&info.colorimetry);
3772 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3773 (_("Device '%s' does not support %s colorimetry"),
3774 v4l2object->videodev, gst_structure_get_string (s, "colorimetry")),
3775 ("Device wants %s colorimetry", wanted_colorimetry));
3777 g_free (wanted_colorimetry);
3782 /* it's possible that this call is not supported */
3783 if (errno != EINVAL && errno != ENOTTY) {
3784 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3785 (_("Could not get parameters on device '%s'"),
3786 v4l2object->videodev), GST_ERROR_SYSTEM);
3792 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3793 (_("Video device did not accept new frame rate setting.")),
3799 /* setup_pool already send the error */
3805 gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps,
3806 GstV4l2Error * error)
3808 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Setting format to %" GST_PTR_FORMAT,
3810 return gst_v4l2_object_set_format_full (v4l2object, caps, FALSE, error);
3814 gst_v4l2_object_try_format (GstV4l2Object * v4l2object, GstCaps * caps,
3815 GstV4l2Error * error)
3817 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Trying format %" GST_PTR_FORMAT,
3819 return gst_v4l2_object_set_format_full (v4l2object, caps, TRUE, error);
3823 * gst_v4l2_object_acquire_format:
3824 * @v4l2object the object
3825 * @info a GstVideoInfo to be filled
3827 * Acquire the driver choosen format. This is useful in decoder or encoder elements where
3828 * the output format is choosen by the HW.
3830 * Returns: %TRUE on success, %FALSE on failure.
3833 gst_v4l2_object_acquire_format (GstV4l2Object * v4l2object, GstVideoInfo * info)
3835 struct v4l2_fmtdesc *fmtdesc;
3836 struct v4l2_format fmt;
3837 struct v4l2_crop crop;
3838 struct v4l2_selection sel;
3839 struct v4l2_rect *r = NULL;
3840 GstVideoFormat format;
3841 guint width, height;
3842 GstVideoAlignment align;
3844 gst_video_info_init (info);
3845 gst_video_alignment_reset (&align);
3847 memset (&fmt, 0x00, sizeof (struct v4l2_format));
3848 fmt.type = v4l2object->type;
3849 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_FMT, &fmt) < 0)
3850 goto get_fmt_failed;
3852 fmtdesc = gst_v4l2_object_get_format_from_fourcc (v4l2object,
3853 fmt.fmt.pix.pixelformat);
3854 if (fmtdesc == NULL)
3855 goto unsupported_format;
3857 /* No need to care about mplane, the four first params are the same */
3858 format = gst_v4l2_object_v4l2fourcc_to_video_format (fmt.fmt.pix.pixelformat);
3860 /* fails if we do no translate the fmt.pix.pixelformat to GstVideoFormat */
3861 if (format == GST_VIDEO_FORMAT_UNKNOWN)
3862 goto unsupported_format;
3864 if (fmt.fmt.pix.width == 0 || fmt.fmt.pix.height == 0)
3865 goto invalid_dimensions;
3867 width = fmt.fmt.pix.width;
3868 height = fmt.fmt.pix.height;
3870 /* Use the default compose rectangle */
3871 memset (&sel, 0, sizeof (struct v4l2_selection));
3872 sel.type = v4l2object->type;
3873 sel.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
3874 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_SELECTION, &sel) >= 0) {
3877 /* For ancient kernels, fall back to G_CROP */
3878 memset (&crop, 0, sizeof (struct v4l2_crop));
3879 crop.type = v4l2object->type;
3880 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CROP, &crop) >= 0)
3884 align.padding_left = r->left;
3885 align.padding_top = r->top;
3886 align.padding_right = width - r->width - r->left;
3887 align.padding_bottom = height - r->height - r->top;
3892 gst_video_info_set_format (info, format, width, height);
3894 switch (fmt.fmt.pix.field) {
3895 case V4L2_FIELD_ANY:
3896 case V4L2_FIELD_NONE:
3897 info->interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
3899 case V4L2_FIELD_INTERLACED:
3900 case V4L2_FIELD_INTERLACED_TB:
3901 case V4L2_FIELD_INTERLACED_BT:
3902 info->interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
3905 goto unsupported_field;
3908 gst_v4l2_object_get_colorspace (&fmt, &info->colorimetry);
3910 gst_v4l2_object_save_format (v4l2object, fmtdesc, &fmt, info, &align);
3912 /* Shall we setup the pool ? */
3918 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
3919 (_("Video device did not provide output format.")), GST_ERROR_SYSTEM);
3924 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
3925 (_("Video device returned invalid dimensions.")),
3926 ("Expected non 0 dimensions, got %dx%d", fmt.fmt.pix.width,
3927 fmt.fmt.pix.height));
3932 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
3933 (_("Video device uses an unsupported interlacing method.")),
3934 ("V4L2 field type %d not supported", fmt.fmt.pix.field));
3939 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
3940 (_("Video device uses an unsupported pixel format.")),
3941 ("V4L2 format %" GST_FOURCC_FORMAT " not supported",
3942 GST_FOURCC_ARGS (fmt.fmt.pix.pixelformat)));
3948 gst_v4l2_object_set_crop (GstV4l2Object * obj)
3950 struct v4l2_selection sel = { 0 };
3951 struct v4l2_crop crop = { 0 };
3953 sel.type = obj->type;
3954 sel.target = V4L2_SEL_TGT_CROP;
3956 sel.r.left = obj->align.padding_left;
3957 sel.r.top = obj->align.padding_top;
3958 sel.r.width = obj->info.width;
3959 sel.r.height = obj->info.height;
3961 crop.type = obj->type;
3964 if (obj->align.padding_left + obj->align.padding_top +
3965 obj->align.padding_right + obj->align.padding_bottom == 0) {
3966 GST_DEBUG_OBJECT (obj->dbg_obj, "no cropping needed");
3970 GST_DEBUG_OBJECT (obj->dbg_obj,
3971 "Desired cropping left %u, top %u, size %ux%u", crop.c.left, crop.c.top,
3972 crop.c.width, crop.c.height);
3974 if (obj->ioctl (obj->video_fd, VIDIOC_S_SELECTION, &sel) < 0) {
3975 if (errno != ENOTTY) {
3976 GST_WARNING_OBJECT (obj->dbg_obj,
3977 "Failed to set crop rectangle with VIDIOC_S_SELECTION: %s",
3978 g_strerror (errno));
3981 if (obj->ioctl (obj->video_fd, VIDIOC_S_CROP, &crop) < 0) {
3982 GST_WARNING_OBJECT (obj->dbg_obj, "VIDIOC_S_CROP failed");
3986 if (obj->ioctl (obj->video_fd, VIDIOC_G_CROP, &crop) < 0) {
3987 GST_WARNING_OBJECT (obj->dbg_obj, "VIDIOC_G_CROP failed");
3995 GST_DEBUG_OBJECT (obj->dbg_obj,
3996 "Got cropping left %u, top %u, size %ux%u", crop.c.left, crop.c.top,
3997 crop.c.width, crop.c.height);
4003 gst_v4l2_object_caps_equal (GstV4l2Object * v4l2object, GstCaps * caps)
4005 GstStructure *config;
4009 if (!v4l2object->pool)
4012 config = gst_buffer_pool_get_config (v4l2object->pool);
4013 gst_buffer_pool_config_get_params (config, &oldcaps, NULL, NULL, NULL);
4015 ret = oldcaps && gst_caps_is_equal (caps, oldcaps);
4017 gst_structure_free (config);
4023 gst_v4l2_object_caps_is_subset (GstV4l2Object * v4l2object, GstCaps * caps)
4025 GstStructure *config;
4029 if (!v4l2object->pool)
4032 config = gst_buffer_pool_get_config (v4l2object->pool);
4033 gst_buffer_pool_config_get_params (config, &oldcaps, NULL, NULL, NULL);
4035 ret = oldcaps && gst_caps_is_subset (oldcaps, caps);
4037 gst_structure_free (config);
4043 gst_v4l2_object_get_current_caps (GstV4l2Object * v4l2object)
4045 GstStructure *config;
4048 if (!v4l2object->pool)
4051 config = gst_buffer_pool_get_config (v4l2object->pool);
4052 gst_buffer_pool_config_get_params (config, &oldcaps, NULL, NULL, NULL);
4055 gst_caps_ref (oldcaps);
4057 gst_structure_free (config);
4063 gst_v4l2_object_unlock (GstV4l2Object * v4l2object)
4065 gboolean ret = TRUE;
4067 GST_LOG_OBJECT (v4l2object->dbg_obj, "start flushing");
4069 if (v4l2object->pool && gst_buffer_pool_is_active (v4l2object->pool))
4070 gst_buffer_pool_set_flushing (v4l2object->pool, TRUE);
4076 gst_v4l2_object_unlock_stop (GstV4l2Object * v4l2object)
4078 gboolean ret = TRUE;
4080 GST_LOG_OBJECT (v4l2object->dbg_obj, "stop flushing");
4082 if (v4l2object->pool && gst_buffer_pool_is_active (v4l2object->pool))
4083 gst_buffer_pool_set_flushing (v4l2object->pool, FALSE);
4089 gst_v4l2_object_stop (GstV4l2Object * v4l2object)
4091 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "stopping");
4093 if (!GST_V4L2_IS_OPEN (v4l2object))
4095 if (!GST_V4L2_IS_ACTIVE (v4l2object))
4098 if (v4l2object->pool) {
4099 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "deactivating pool");
4100 gst_buffer_pool_set_active (v4l2object->pool, FALSE);
4101 gst_object_unref (v4l2object->pool);
4102 v4l2object->pool = NULL;
4105 GST_V4L2_SET_INACTIVE (v4l2object);
4112 gst_v4l2_object_probe_caps (GstV4l2Object * v4l2object, GstCaps * filter)
4118 formats = gst_v4l2_object_get_format_list (v4l2object);
4120 ret = gst_caps_new_empty ();
4122 if (v4l2object->keep_aspect && !v4l2object->par) {
4123 struct v4l2_cropcap cropcap;
4125 memset (&cropcap, 0, sizeof (cropcap));
4127 cropcap.type = v4l2object->type;
4128 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_CROPCAP, &cropcap) < 0) {
4129 if (errno != ENOTTY)
4130 GST_WARNING_OBJECT (v4l2object->dbg_obj,
4131 "Failed to probe pixel aspect ratio with VIDIOC_CROPCAP: %s",
4132 g_strerror (errno));
4134 v4l2object->par = g_new0 (GValue, 1);
4135 g_value_init (v4l2object->par, GST_TYPE_FRACTION);
4136 gst_value_set_fraction (v4l2object->par, cropcap.pixelaspect.numerator,
4137 cropcap.pixelaspect.denominator);
4141 for (walk = formats; walk; walk = walk->next) {
4142 struct v4l2_fmtdesc *format;
4143 GstStructure *template;
4146 format = (struct v4l2_fmtdesc *) walk->data;
4148 template = gst_v4l2_object_v4l2fourcc_to_bare_struct (format->pixelformat);
4151 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
4152 "unknown format %" GST_FOURCC_FORMAT,
4153 GST_FOURCC_ARGS (format->pixelformat));
4157 /* If we have a filter, check if we need to probe this format or not */
4159 GstCaps *format_caps = gst_caps_new_empty ();
4161 gst_caps_append_structure (format_caps, gst_structure_copy (template));
4163 if (!gst_caps_can_intersect (format_caps, filter)) {
4164 gst_caps_unref (format_caps);
4165 gst_structure_free (template);
4169 gst_caps_unref (format_caps);
4172 tmp = gst_v4l2_object_probe_caps_for_format (v4l2object,
4173 format->pixelformat, template);
4175 gst_caps_append (ret, tmp);
4177 gst_structure_free (template);
4184 ret = gst_caps_intersect_full (filter, ret, GST_CAPS_INTERSECT_FIRST);
4185 gst_caps_unref (tmp);
4188 GST_INFO_OBJECT (v4l2object->dbg_obj, "probed caps: %" GST_PTR_FORMAT, ret);
4194 gst_v4l2_object_get_caps (GstV4l2Object * v4l2object, GstCaps * filter)
4198 if (v4l2object->probed_caps == NULL)
4199 v4l2object->probed_caps = gst_v4l2_object_probe_caps (v4l2object, NULL);
4202 ret = gst_caps_intersect_full (filter, v4l2object->probed_caps,
4203 GST_CAPS_INTERSECT_FIRST);
4205 ret = gst_caps_ref (v4l2object->probed_caps);
4212 gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
4215 GstBufferPool *pool = NULL, *other_pool = NULL;
4216 GstStructure *config;
4217 guint size, min, max, own_min = 0;
4219 gboolean has_video_meta;
4220 gboolean can_share_own_pool, pushing_from_our_pool = FALSE;
4221 GstAllocator *allocator = NULL;
4222 GstAllocationParams params = { 0 };
4224 GST_DEBUG_OBJECT (obj->dbg_obj, "decide allocation");
4226 g_return_val_if_fail (obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
4227 obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE, FALSE);
4229 gst_query_parse_allocation (query, &caps, NULL);
4231 if (obj->pool == NULL) {
4232 if (!gst_v4l2_object_setup_pool (obj, caps))
4236 if (gst_query_get_n_allocation_params (query) > 0)
4237 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
4239 if (gst_query_get_n_allocation_pools (query) > 0) {
4240 gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
4249 GST_DEBUG_OBJECT (obj->dbg_obj, "allocation: size:%u min:%u max:%u pool:%"
4250 GST_PTR_FORMAT, size, min, max, pool);
4253 gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
4255 can_share_own_pool = (has_video_meta || !obj->need_video_meta);
4257 gst_v4l2_get_driver_min_buffers (obj);
4258 /* We can't share our own pool, if it exceed V4L2 capacity */
4259 if (min + obj->min_buffers + 1 > VIDEO_MAX_FRAME)
4260 can_share_own_pool = FALSE;
4263 switch (obj->mode) {
4264 case GST_V4L2_IO_RW:
4266 /* in READ/WRITE mode, prefer a downstream pool because our own pool
4267 * doesn't help much, we have to write to it as well */
4268 GST_DEBUG_OBJECT (obj->dbg_obj,
4269 "read/write mode: using downstream pool");
4270 /* use the bigest size, when we use our own pool we can't really do any
4271 * other size than what the hardware gives us but for downstream pools
4273 size = MAX (size, obj->info.size);
4274 } else if (can_share_own_pool) {
4275 /* no downstream pool, use our own then */
4276 GST_DEBUG_OBJECT (obj->dbg_obj,
4277 "read/write mode: no downstream pool, using our own");
4278 pool = gst_object_ref (obj->pool);
4279 size = obj->info.size;
4280 pushing_from_our_pool = TRUE;
4284 case GST_V4L2_IO_USERPTR:
4285 case GST_V4L2_IO_DMABUF_IMPORT:
4286 /* in importing mode, prefer our own pool, and pass the other pool to
4287 * our own, so it can serve itself */
4289 goto no_downstream_pool;
4290 gst_v4l2_buffer_pool_set_other_pool (GST_V4L2_BUFFER_POOL (obj->pool),
4293 gst_object_unref (pool);
4294 pool = gst_object_ref (obj->pool);
4295 size = obj->info.size;
4298 case GST_V4L2_IO_MMAP:
4299 case GST_V4L2_IO_DMABUF:
4300 /* in streaming mode, prefer our own pool */
4301 /* Check if we can use it ... */
4302 if (can_share_own_pool) {
4304 gst_object_unref (pool);
4305 pool = gst_object_ref (obj->pool);
4306 size = obj->info.size;
4307 GST_DEBUG_OBJECT (obj->dbg_obj,
4308 "streaming mode: using our own pool %" GST_PTR_FORMAT, pool);
4309 pushing_from_our_pool = TRUE;
4311 GST_DEBUG_OBJECT (obj->dbg_obj,
4312 "streaming mode: copying to downstream pool %" GST_PTR_FORMAT,
4315 GST_DEBUG_OBJECT (obj->dbg_obj,
4316 "streaming mode: no usable pool, copying to generic pool");
4317 size = MAX (size, obj->info.size);
4320 case GST_V4L2_IO_AUTO:
4322 GST_WARNING_OBJECT (obj->dbg_obj, "unhandled mode");
4329 /* If pushing from our own pool, configure it with queried minimum,
4330 * otherwise use the minimum required */
4331 if (pushing_from_our_pool) {
4332 /* When pushing from our own pool, we need what downstream one, to be able
4333 * to fill the pipeline, the minimum required to decoder according to the
4334 * driver and 2 more, so we don't endup up with everything downstream or
4335 * held by the decoder. We account 2 buffers for v4l2 so when one is being
4336 * pushed downstream the other one can already be queued for the next
4338 own_min = min + obj->min_buffers + 2;
4340 /* If no allocation parameters where provided, allow for a little more
4341 * buffers and enable copy threshold */
4344 gst_v4l2_buffer_pool_copy_at_threshold (GST_V4L2_BUFFER_POOL (pool),
4347 gst_v4l2_buffer_pool_copy_at_threshold (GST_V4L2_BUFFER_POOL (pool),
4352 /* In this case we'll have to configure two buffer pool. For our buffer
4353 * pool, we'll need what the driver one, and one more, so we can dequeu */
4354 own_min = obj->min_buffers + 1;
4355 own_min = MAX (own_min, GST_V4L2_MIN_BUFFERS);
4357 /* for the downstream pool, we keep what downstream wants, though ensure
4358 * at least a minimum if downstream didn't suggest anything (we are
4359 * expecting the base class to create a default one for the context) */
4360 min = MAX (min, GST_V4L2_MIN_BUFFERS);
4362 /* To import we need the other pool to hold at least own_min */
4363 if (obj->pool == pool)
4367 /* Request a bigger max, if one was suggested but it's too small */
4369 max = MAX (min, max);
4371 /* First step, configure our own pool */
4372 config = gst_buffer_pool_get_config (obj->pool);
4374 if (obj->need_video_meta || has_video_meta) {
4375 GST_DEBUG_OBJECT (obj->dbg_obj, "activate Video Meta");
4376 gst_buffer_pool_config_add_option (config,
4377 GST_BUFFER_POOL_OPTION_VIDEO_META);
4380 gst_buffer_pool_config_set_allocator (config, allocator, ¶ms);
4381 gst_buffer_pool_config_set_params (config, caps, size, own_min, 0);
4383 GST_DEBUG_OBJECT (obj->dbg_obj, "setting own pool config to %"
4384 GST_PTR_FORMAT, config);
4386 /* Our pool often need to adjust the value */
4387 if (!gst_buffer_pool_set_config (obj->pool, config)) {
4388 config = gst_buffer_pool_get_config (obj->pool);
4390 GST_DEBUG_OBJECT (obj->dbg_obj, "own pool config changed to %"
4391 GST_PTR_FORMAT, config);
4393 /* our pool will adjust the maximum buffer, which we are fine with */
4394 if (!gst_buffer_pool_set_config (obj->pool, config))
4398 /* Now configure the other pool if different */
4399 if (obj->pool != pool)
4403 config = gst_buffer_pool_get_config (other_pool);
4404 gst_buffer_pool_config_set_allocator (config, allocator, ¶ms);
4405 gst_buffer_pool_config_set_params (config, caps, size, min, max);
4407 GST_DEBUG_OBJECT (obj->dbg_obj, "setting other pool config to %"
4408 GST_PTR_FORMAT, config);
4410 /* if downstream supports video metadata, add this to the pool config */
4411 if (has_video_meta) {
4412 GST_DEBUG_OBJECT (obj->dbg_obj, "activate Video Meta");
4413 gst_buffer_pool_config_add_option (config,
4414 GST_BUFFER_POOL_OPTION_VIDEO_META);
4417 if (!gst_buffer_pool_set_config (other_pool, config)) {
4418 config = gst_buffer_pool_get_config (other_pool);
4420 if (!gst_buffer_pool_config_validate_params (config, caps, size, min,
4422 gst_structure_free (config);
4426 if (!gst_buffer_pool_set_config (other_pool, config))
4432 /* For simplicity, simply read back the active configuration, so our base
4433 * class get the right information */
4434 config = gst_buffer_pool_get_config (pool);
4435 gst_buffer_pool_config_get_params (config, NULL, &size, &min, &max);
4436 gst_structure_free (config);
4440 gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
4442 gst_query_add_allocation_pool (query, pool, size, min, max);
4445 gst_object_unref (allocator);
4448 gst_object_unref (pool);
4454 /* setup_pool already send the error */
4459 GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
4460 (_("Failed to configure internal buffer pool.")), (NULL));
4465 GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
4466 (_("Video device did not suggest any buffer size.")), (NULL));
4472 gst_object_unref (allocator);
4475 gst_object_unref (pool);
4480 GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
4481 (_("No downstream pool to import from.")),
4482 ("When importing DMABUF or USERPTR, we need a pool to import from"));
4488 gst_v4l2_object_propose_allocation (GstV4l2Object * obj, GstQuery * query)
4490 GstBufferPool *pool;
4491 /* we need at least 2 buffers to operate */
4492 guint size, min, max;
4496 /* Set defaults allocation parameters */
4497 size = obj->info.size;
4498 min = GST_V4L2_MIN_BUFFERS;
4499 max = VIDEO_MAX_FRAME;
4501 gst_query_parse_allocation (query, &caps, &need_pool);
4506 if ((pool = obj->pool))
4507 gst_object_ref (pool);
4511 GstStructure *config;
4513 /* we had a pool, check caps */
4514 config = gst_buffer_pool_get_config (pool);
4515 gst_buffer_pool_config_get_params (config, &pcaps, NULL, NULL, NULL);
4517 GST_DEBUG_OBJECT (obj->dbg_obj,
4518 "we had a pool with caps %" GST_PTR_FORMAT, pcaps);
4519 if (!gst_caps_is_equal (caps, pcaps)) {
4520 gst_structure_free (config);
4521 gst_object_unref (pool);
4522 goto different_caps;
4524 gst_structure_free (config);
4526 gst_v4l2_get_driver_min_buffers (obj);
4528 min = MAX (obj->min_buffers, GST_V4L2_MIN_BUFFERS);
4530 gst_query_add_allocation_pool (query, pool, size, min, max);
4532 /* we also support various metadata */
4533 gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
4536 gst_object_unref (pool);
4543 GST_DEBUG_OBJECT (obj->dbg_obj, "no caps specified");
4548 /* different caps, we can't use this pool */
4549 GST_DEBUG_OBJECT (obj->dbg_obj, "pool has different caps");