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 *new = NULL;
725 if (GST_V4L2_IS_OPEN (v4l2object)) {
726 new = v4l2object->vcap.card;
727 } else if (gst_v4l2_open (v4l2object)) {
728 new = v4l2object->vcap.card;
729 gst_v4l2_close (v4l2object);
731 g_value_set_string (value, (gchar *) new);
736 if (GST_V4L2_IS_OPEN (v4l2object))
737 g_value_set_int (value, v4l2object->video_fd);
739 g_value_set_int (value, DEFAULT_PROP_DEVICE_FD);
746 if (GST_V4L2_IS_OPEN (v4l2object)) {
747 flags |= v4l2object->device_caps &
748 (V4L2_CAP_VIDEO_CAPTURE |
749 V4L2_CAP_VIDEO_OUTPUT |
750 V4L2_CAP_VIDEO_OVERLAY |
751 V4L2_CAP_VBI_CAPTURE |
752 V4L2_CAP_VBI_OUTPUT | V4L2_CAP_TUNER | V4L2_CAP_AUDIO);
754 if (v4l2object->device_caps & V4L2_CAP_VIDEO_CAPTURE_MPLANE)
755 flags |= V4L2_CAP_VIDEO_CAPTURE;
757 if (v4l2object->device_caps & V4L2_CAP_VIDEO_OUTPUT_MPLANE)
758 flags |= V4L2_CAP_VIDEO_OUTPUT;
760 g_value_set_flags (value, flags);
763 case PROP_BRIGHTNESS:
765 case PROP_SATURATION:
768 gint cid = gst_v4l2_object_prop_to_cid (prop_id);
771 if (GST_V4L2_IS_OPEN (v4l2object)) {
773 if (gst_v4l2_get_attribute (v4l2object, cid, &v)) {
774 g_value_set_int (value, v);
782 g_value_set_enum (value, v4l2object->tv_norm);
785 g_value_set_enum (value, v4l2object->req_mode);
787 case PROP_CAPTURE_IO_MODE:
788 g_return_val_if_fail (!V4L2_TYPE_IS_OUTPUT (v4l2object->type), FALSE);
789 g_value_set_enum (value, v4l2object->req_mode);
791 case PROP_OUTPUT_IO_MODE:
792 g_return_val_if_fail (V4L2_TYPE_IS_OUTPUT (v4l2object->type), FALSE);
793 g_value_set_enum (value, v4l2object->req_mode);
795 case PROP_EXTRA_CONTROLS:
796 gst_value_set_structure (value, v4l2object->extra_controls);
798 case PROP_PIXEL_ASPECT_RATIO:
800 g_value_transform (v4l2object->par, value);
802 case PROP_FORCE_ASPECT_RATIO:
803 g_value_set_boolean (value, v4l2object->keep_aspect);
813 gst_v4l2_get_driver_min_buffers (GstV4l2Object * v4l2object)
815 struct v4l2_control control = { 0, };
817 g_return_if_fail (GST_V4L2_IS_OPEN (v4l2object));
819 if (V4L2_TYPE_IS_OUTPUT (v4l2object->type))
820 control.id = V4L2_CID_MIN_BUFFERS_FOR_OUTPUT;
822 control.id = V4L2_CID_MIN_BUFFERS_FOR_CAPTURE;
824 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CTRL, &control) == 0) {
825 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
826 "driver requires a minimum of %d buffers", control.value);
827 v4l2object->min_buffers = control.value;
829 v4l2object->min_buffers = 0;
834 gst_v4l2_set_defaults (GstV4l2Object * v4l2object)
836 GstTunerNorm *norm = NULL;
837 GstTunerChannel *channel = NULL;
840 if (!GST_IS_TUNER (v4l2object->element))
843 tuner = GST_TUNER (v4l2object->element);
845 if (v4l2object->tv_norm)
846 norm = gst_v4l2_tuner_get_norm_by_std_id (v4l2object, v4l2object->tv_norm);
847 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "tv_norm=0x%" G_GINT64_MODIFIER "x, "
848 "norm=%p", (guint64) v4l2object->tv_norm, norm);
850 gst_tuner_set_norm (tuner, norm);
853 GST_TUNER_NORM (gst_tuner_get_norm (GST_TUNER (v4l2object->element)));
855 v4l2object->tv_norm =
856 gst_v4l2_tuner_get_std_id_by_norm (v4l2object, norm);
857 gst_tuner_norm_changed (tuner, norm);
861 if (v4l2object->channel)
862 channel = gst_tuner_find_channel_by_name (tuner, v4l2object->channel);
864 gst_tuner_set_channel (tuner, channel);
867 GST_TUNER_CHANNEL (gst_tuner_get_channel (GST_TUNER
868 (v4l2object->element)));
870 g_free (v4l2object->channel);
871 v4l2object->channel = g_strdup (channel->label);
872 gst_tuner_channel_changed (tuner, channel);
877 && GST_TUNER_CHANNEL_HAS_FLAG (channel, GST_TUNER_CHANNEL_FREQUENCY)) {
878 if (v4l2object->frequency != 0) {
879 gst_tuner_set_frequency (tuner, channel, v4l2object->frequency);
881 v4l2object->frequency = gst_tuner_get_frequency (tuner, channel);
882 if (v4l2object->frequency == 0) {
884 gst_tuner_set_frequency (tuner, channel, 1000);
892 gst_v4l2_object_open (GstV4l2Object * v4l2object)
894 if (gst_v4l2_open (v4l2object))
895 gst_v4l2_set_defaults (v4l2object);
903 gst_v4l2_object_open_shared (GstV4l2Object * v4l2object, GstV4l2Object * other)
907 ret = gst_v4l2_dup (v4l2object, other);
913 gst_v4l2_object_close (GstV4l2Object * v4l2object)
915 if (!gst_v4l2_close (v4l2object))
918 gst_caps_replace (&v4l2object->probed_caps, NULL);
920 /* reset our copy of the device caps */
921 v4l2object->device_caps = 0;
923 if (v4l2object->formats) {
924 gst_v4l2_object_clear_format_list (v4l2object);
927 if (v4l2object->par) {
928 g_value_unset (v4l2object->par);
929 g_free (v4l2object->par);
930 v4l2object->par = NULL;
936 static struct v4l2_fmtdesc *
937 gst_v4l2_object_get_format_from_fourcc (GstV4l2Object * v4l2object,
940 struct v4l2_fmtdesc *fmt;
946 walk = gst_v4l2_object_get_format_list (v4l2object);
948 fmt = (struct v4l2_fmtdesc *) walk->data;
949 if (fmt->pixelformat == fourcc)
951 /* special case for jpeg */
952 if (fmt->pixelformat == V4L2_PIX_FMT_MJPEG ||
953 fmt->pixelformat == V4L2_PIX_FMT_JPEG ||
954 fmt->pixelformat == V4L2_PIX_FMT_PJPG) {
955 if (fourcc == V4L2_PIX_FMT_JPEG || fourcc == V4L2_PIX_FMT_MJPEG ||
956 fourcc == V4L2_PIX_FMT_PJPG) {
960 walk = g_slist_next (walk);
968 /* complete made up ranking, the values themselves are meaningless */
969 /* These ranks MUST be X such that X<<15 fits on a signed int - see
970 the comment at the end of gst_v4l2_object_format_get_rank. */
971 #define YUV_BASE_RANK 1000
972 #define JPEG_BASE_RANK 500
973 #define DV_BASE_RANK 200
974 #define RGB_BASE_RANK 100
975 #define YUV_ODD_BASE_RANK 50
976 #define RGB_ODD_BASE_RANK 25
977 #define BAYER_BASE_RANK 15
978 #define S910_BASE_RANK 10
979 #define GREY_BASE_RANK 5
980 #define PWC_BASE_RANK 1
983 gst_v4l2_object_format_get_rank (const struct v4l2_fmtdesc *fmt)
985 guint32 fourcc = fmt->pixelformat;
986 gboolean emulated = ((fmt->flags & V4L2_FMT_FLAG_EMULATED) != 0);
990 case V4L2_PIX_FMT_MJPEG:
991 case V4L2_PIX_FMT_PJPG:
992 rank = JPEG_BASE_RANK;
994 case V4L2_PIX_FMT_JPEG:
995 rank = JPEG_BASE_RANK + 1;
997 case V4L2_PIX_FMT_MPEG: /* MPEG */
998 rank = JPEG_BASE_RANK + 2;
1001 case V4L2_PIX_FMT_RGB332:
1002 case V4L2_PIX_FMT_ARGB555:
1003 case V4L2_PIX_FMT_XRGB555:
1004 case V4L2_PIX_FMT_RGB555:
1005 case V4L2_PIX_FMT_ARGB555X:
1006 case V4L2_PIX_FMT_XRGB555X:
1007 case V4L2_PIX_FMT_RGB555X:
1008 case V4L2_PIX_FMT_BGR666:
1009 case V4L2_PIX_FMT_RGB565:
1010 case V4L2_PIX_FMT_RGB565X:
1011 case V4L2_PIX_FMT_RGB444:
1012 case V4L2_PIX_FMT_Y4:
1013 case V4L2_PIX_FMT_Y6:
1014 case V4L2_PIX_FMT_Y10:
1015 case V4L2_PIX_FMT_Y12:
1016 case V4L2_PIX_FMT_Y10BPACK:
1017 case V4L2_PIX_FMT_YUV555:
1018 case V4L2_PIX_FMT_YUV565:
1019 case V4L2_PIX_FMT_YUV32:
1020 case V4L2_PIX_FMT_NV12MT_16X16:
1021 case V4L2_PIX_FMT_NV42:
1022 case V4L2_PIX_FMT_H264_MVC:
1023 rank = RGB_ODD_BASE_RANK;
1026 case V4L2_PIX_FMT_RGB24:
1027 case V4L2_PIX_FMT_BGR24:
1028 rank = RGB_BASE_RANK - 1;
1031 case V4L2_PIX_FMT_RGB32:
1032 case V4L2_PIX_FMT_BGR32:
1033 case V4L2_PIX_FMT_ABGR32:
1034 case V4L2_PIX_FMT_XBGR32:
1035 case V4L2_PIX_FMT_ARGB32:
1036 case V4L2_PIX_FMT_XRGB32:
1037 rank = RGB_BASE_RANK;
1040 case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
1041 rank = GREY_BASE_RANK;
1044 case V4L2_PIX_FMT_NV12: /* 12 Y/CbCr 4:2:0 */
1045 case V4L2_PIX_FMT_NV12M: /* Same as NV12 */
1046 case V4L2_PIX_FMT_NV12MT: /* NV12 64x32 tile */
1047 case V4L2_PIX_FMT_NV21: /* 12 Y/CrCb 4:2:0 */
1048 case V4L2_PIX_FMT_NV21M: /* Same as NV21 */
1049 case V4L2_PIX_FMT_YYUV: /* 16 YUV 4:2:2 */
1050 case V4L2_PIX_FMT_HI240: /* 8 8-bit color */
1051 case V4L2_PIX_FMT_NV16: /* 16 Y/CbCr 4:2:2 */
1052 case V4L2_PIX_FMT_NV16M: /* Same as NV16 */
1053 case V4L2_PIX_FMT_NV61: /* 16 Y/CrCb 4:2:2 */
1054 case V4L2_PIX_FMT_NV61M: /* Same as NV61 */
1055 case V4L2_PIX_FMT_NV24: /* 24 Y/CrCb 4:4:4 */
1056 rank = YUV_ODD_BASE_RANK;
1059 case V4L2_PIX_FMT_YVU410: /* YVU9, 9 bits per pixel */
1060 rank = YUV_BASE_RANK + 3;
1062 case V4L2_PIX_FMT_YUV410: /* YUV9, 9 bits per pixel */
1063 rank = YUV_BASE_RANK + 2;
1065 case V4L2_PIX_FMT_YUV420: /* I420, 12 bits per pixel */
1066 case V4L2_PIX_FMT_YUV420M:
1067 rank = YUV_BASE_RANK + 7;
1069 case V4L2_PIX_FMT_YUYV: /* YUY2, 16 bits per pixel */
1070 rank = YUV_BASE_RANK + 10;
1072 case V4L2_PIX_FMT_YVU420: /* YV12, 12 bits per pixel */
1073 rank = YUV_BASE_RANK + 6;
1075 case V4L2_PIX_FMT_UYVY: /* UYVY, 16 bits per pixel */
1076 rank = YUV_BASE_RANK + 9;
1078 case V4L2_PIX_FMT_YUV444:
1079 rank = YUV_BASE_RANK + 6;
1081 case V4L2_PIX_FMT_Y41P: /* Y41P, 12 bits per pixel */
1082 rank = YUV_BASE_RANK + 5;
1084 case V4L2_PIX_FMT_YUV411P: /* Y41B, 12 bits per pixel */
1085 rank = YUV_BASE_RANK + 4;
1087 case V4L2_PIX_FMT_YUV422P: /* Y42B, 16 bits per pixel */
1088 rank = YUV_BASE_RANK + 8;
1091 case V4L2_PIX_FMT_DV:
1092 rank = DV_BASE_RANK;
1095 case V4L2_PIX_FMT_WNVA: /* Winnov hw compres */
1099 case V4L2_PIX_FMT_SBGGR8:
1100 case V4L2_PIX_FMT_SGBRG8:
1101 case V4L2_PIX_FMT_SGRBG8:
1102 case V4L2_PIX_FMT_SRGGB8:
1103 rank = BAYER_BASE_RANK;
1106 case V4L2_PIX_FMT_SN9C10X:
1107 rank = S910_BASE_RANK;
1110 case V4L2_PIX_FMT_PWC1:
1111 rank = PWC_BASE_RANK;
1113 case V4L2_PIX_FMT_PWC2:
1114 rank = PWC_BASE_RANK;
1122 /* All ranks are below 1<<15 so a shift by 15
1123 * will a) make all non-emulated formats larger
1124 * than emulated and b) will not overflow
1135 format_cmp_func (gconstpointer a, gconstpointer b)
1137 const struct v4l2_fmtdesc *fa = a;
1138 const struct v4l2_fmtdesc *fb = b;
1140 if (fa->pixelformat == fb->pixelformat)
1143 return gst_v4l2_object_format_get_rank (fb) -
1144 gst_v4l2_object_format_get_rank (fa);
1147 /******************************************************
1148 * gst_v4l2_object_fill_format_list():
1149 * create list of supported capture formats
1150 * return value: TRUE on success, FALSE on error
1151 ******************************************************/
1153 gst_v4l2_object_fill_format_list (GstV4l2Object * v4l2object,
1154 enum v4l2_buf_type type)
1157 struct v4l2_fmtdesc *format;
1159 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "getting src format enumerations");
1161 /* format enumeration */
1163 format = g_new0 (struct v4l2_fmtdesc, 1);
1166 format->type = type;
1168 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_ENUM_FMT, format) < 0) {
1169 if (errno == EINVAL) {
1171 break; /* end of enumeration */
1177 GST_LOG_OBJECT (v4l2object->dbg_obj, "index: %u", format->index);
1178 GST_LOG_OBJECT (v4l2object->dbg_obj, "type: %d", format->type);
1179 GST_LOG_OBJECT (v4l2object->dbg_obj, "flags: %08x", format->flags);
1180 GST_LOG_OBJECT (v4l2object->dbg_obj, "description: '%s'",
1181 format->description);
1182 GST_LOG_OBJECT (v4l2object->dbg_obj, "pixelformat: %" GST_FOURCC_FORMAT,
1183 GST_FOURCC_ARGS (format->pixelformat));
1185 /* sort formats according to our preference; we do this, because caps
1186 * are probed in the order the formats are in the list, and the order of
1187 * formats in the final probed caps matters for things like fixation */
1188 v4l2object->formats = g_slist_insert_sorted (v4l2object->formats, format,
1189 (GCompareFunc) format_cmp_func);
1192 #ifndef GST_DISABLE_GST_DEBUG
1196 GST_INFO_OBJECT (v4l2object->dbg_obj, "got %d format(s):", n);
1197 for (l = v4l2object->formats; l != NULL; l = l->next) {
1200 GST_INFO_OBJECT (v4l2object->dbg_obj,
1201 " %" GST_FOURCC_FORMAT "%s", GST_FOURCC_ARGS (format->pixelformat),
1202 ((format->flags & V4L2_FMT_FLAG_EMULATED)) ? " (emulated)" : "");
1214 if (v4l2object->element)
1217 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
1218 (_("Failed to enumerate possible video formats device '%s' can work "
1219 "with"), v4l2object->videodev),
1220 ("Failed to get number %d in pixelformat enumeration for %s. (%d - %s)",
1221 n, v4l2object->videodev, errno, g_strerror (errno)));
1228 * Get the list of supported capture formats, a list of
1229 * <code>struct v4l2_fmtdesc</code>.
1232 gst_v4l2_object_get_format_list (GstV4l2Object * v4l2object)
1234 if (!v4l2object->formats) {
1236 /* check usual way */
1237 gst_v4l2_object_fill_format_list (v4l2object, v4l2object->type);
1239 /* if our driver supports multi-planar
1240 * and if formats are still empty then we can workaround driver bug
1241 * by also looking up formats as if our device was not supporting
1243 if (!v4l2object->formats) {
1244 switch (v4l2object->type) {
1245 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
1246 gst_v4l2_object_fill_format_list (v4l2object,
1247 V4L2_BUF_TYPE_VIDEO_CAPTURE);
1250 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1251 gst_v4l2_object_fill_format_list (v4l2object,
1252 V4L2_BUF_TYPE_VIDEO_OUTPUT);
1260 return v4l2object->formats;
1263 static GstVideoFormat
1264 gst_v4l2_object_v4l2fourcc_to_video_format (guint32 fourcc)
1266 GstVideoFormat format;
1269 case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
1270 format = GST_VIDEO_FORMAT_GRAY8;
1272 case V4L2_PIX_FMT_Y16:
1273 format = GST_VIDEO_FORMAT_GRAY16_LE;
1275 case V4L2_PIX_FMT_Y16_BE:
1276 format = GST_VIDEO_FORMAT_GRAY16_BE;
1278 case V4L2_PIX_FMT_XRGB555:
1279 case V4L2_PIX_FMT_RGB555:
1280 format = GST_VIDEO_FORMAT_RGB15;
1282 case V4L2_PIX_FMT_XRGB555X:
1283 case V4L2_PIX_FMT_RGB555X:
1284 format = GST_VIDEO_FORMAT_BGR15;
1286 case V4L2_PIX_FMT_RGB565:
1287 format = GST_VIDEO_FORMAT_RGB16;
1289 case V4L2_PIX_FMT_RGB24:
1290 format = GST_VIDEO_FORMAT_RGB;
1292 case V4L2_PIX_FMT_BGR24:
1293 format = GST_VIDEO_FORMAT_BGR;
1295 case V4L2_PIX_FMT_XRGB32:
1296 case V4L2_PIX_FMT_RGB32:
1297 format = GST_VIDEO_FORMAT_xRGB;
1299 case V4L2_PIX_FMT_XBGR32:
1300 case V4L2_PIX_FMT_BGR32:
1301 format = GST_VIDEO_FORMAT_BGRx;
1303 case V4L2_PIX_FMT_ABGR32:
1304 format = GST_VIDEO_FORMAT_BGRA;
1306 case V4L2_PIX_FMT_ARGB32:
1307 format = GST_VIDEO_FORMAT_ARGB;
1309 case V4L2_PIX_FMT_NV12:
1310 case V4L2_PIX_FMT_NV12M:
1311 format = GST_VIDEO_FORMAT_NV12;
1313 case V4L2_PIX_FMT_NV12MT:
1314 format = GST_VIDEO_FORMAT_NV12_64Z32;
1316 case V4L2_PIX_FMT_NV21:
1317 case V4L2_PIX_FMT_NV21M:
1318 format = GST_VIDEO_FORMAT_NV21;
1320 case V4L2_PIX_FMT_YVU410:
1321 format = GST_VIDEO_FORMAT_YVU9;
1323 case V4L2_PIX_FMT_YUV410:
1324 format = GST_VIDEO_FORMAT_YUV9;
1326 case V4L2_PIX_FMT_YUV420:
1327 case V4L2_PIX_FMT_YUV420M:
1328 format = GST_VIDEO_FORMAT_I420;
1330 case V4L2_PIX_FMT_YUYV:
1331 format = GST_VIDEO_FORMAT_YUY2;
1333 case V4L2_PIX_FMT_YVU420:
1334 format = GST_VIDEO_FORMAT_YV12;
1336 case V4L2_PIX_FMT_UYVY:
1337 format = GST_VIDEO_FORMAT_UYVY;
1339 case V4L2_PIX_FMT_YUV411P:
1340 format = GST_VIDEO_FORMAT_Y41B;
1342 case V4L2_PIX_FMT_YUV422P:
1343 format = GST_VIDEO_FORMAT_Y42B;
1345 case V4L2_PIX_FMT_YVYU:
1346 format = GST_VIDEO_FORMAT_YVYU;
1348 case V4L2_PIX_FMT_NV16:
1349 case V4L2_PIX_FMT_NV16M:
1350 format = GST_VIDEO_FORMAT_NV16;
1352 case V4L2_PIX_FMT_NV61:
1353 case V4L2_PIX_FMT_NV61M:
1354 format = GST_VIDEO_FORMAT_NV61;
1356 case V4L2_PIX_FMT_NV24:
1357 format = GST_VIDEO_FORMAT_NV24;
1360 format = GST_VIDEO_FORMAT_UNKNOWN;
1368 gst_v4l2_object_v4l2fourcc_is_rgb (guint32 fourcc)
1370 gboolean ret = FALSE;
1373 case V4L2_PIX_FMT_XRGB555:
1374 case V4L2_PIX_FMT_RGB555:
1375 case V4L2_PIX_FMT_XRGB555X:
1376 case V4L2_PIX_FMT_RGB555X:
1377 case V4L2_PIX_FMT_RGB565:
1378 case V4L2_PIX_FMT_RGB24:
1379 case V4L2_PIX_FMT_BGR24:
1380 case V4L2_PIX_FMT_XRGB32:
1381 case V4L2_PIX_FMT_RGB32:
1382 case V4L2_PIX_FMT_XBGR32:
1383 case V4L2_PIX_FMT_BGR32:
1384 case V4L2_PIX_FMT_ABGR32:
1385 case V4L2_PIX_FMT_ARGB32:
1395 static GstStructure *
1396 gst_v4l2_object_v4l2fourcc_to_bare_struct (guint32 fourcc)
1398 GstStructure *structure = NULL;
1401 case V4L2_PIX_FMT_MJPEG: /* Motion-JPEG */
1402 case V4L2_PIX_FMT_PJPG: /* Progressive-JPEG */
1403 case V4L2_PIX_FMT_JPEG: /* JFIF JPEG */
1404 structure = gst_structure_new_empty ("image/jpeg");
1406 case V4L2_PIX_FMT_MPEG1:
1407 structure = gst_structure_new ("video/mpeg",
1408 "mpegversion", G_TYPE_INT, 2, NULL);
1410 case V4L2_PIX_FMT_MPEG2:
1411 structure = gst_structure_new ("video/mpeg",
1412 "mpegversion", G_TYPE_INT, 2, NULL);
1414 case V4L2_PIX_FMT_MPEG4:
1415 case V4L2_PIX_FMT_XVID:
1416 structure = gst_structure_new ("video/mpeg",
1417 "mpegversion", G_TYPE_INT, 4, "systemstream",
1418 G_TYPE_BOOLEAN, FALSE, NULL);
1420 case V4L2_PIX_FMT_H263:
1421 structure = gst_structure_new ("video/x-h263",
1422 "variant", G_TYPE_STRING, "itu", NULL);
1424 case V4L2_PIX_FMT_H264: /* H.264 */
1425 structure = gst_structure_new ("video/x-h264",
1426 "stream-format", G_TYPE_STRING, "byte-stream", "alignment",
1427 G_TYPE_STRING, "au", NULL);
1429 case V4L2_PIX_FMT_H264_NO_SC:
1430 structure = gst_structure_new ("video/x-h264",
1431 "stream-format", G_TYPE_STRING, "avc", "alignment",
1432 G_TYPE_STRING, "au", NULL);
1434 case V4L2_PIX_FMT_VC1_ANNEX_G:
1435 case V4L2_PIX_FMT_VC1_ANNEX_L:
1436 structure = gst_structure_new ("video/x-wmv",
1437 "wmvversion", G_TYPE_INT, 3, "format", G_TYPE_STRING, "WVC1", NULL);
1439 case V4L2_PIX_FMT_VP8:
1440 structure = gst_structure_new_empty ("video/x-vp8");
1442 case V4L2_PIX_FMT_VP9:
1443 structure = gst_structure_new_empty ("video/x-vp9");
1445 case V4L2_PIX_FMT_GREY: /* 8 Greyscale */
1446 case V4L2_PIX_FMT_Y16:
1447 case V4L2_PIX_FMT_Y16_BE:
1448 case V4L2_PIX_FMT_XRGB555:
1449 case V4L2_PIX_FMT_RGB555:
1450 case V4L2_PIX_FMT_XRGB555X:
1451 case V4L2_PIX_FMT_RGB555X:
1452 case V4L2_PIX_FMT_RGB565:
1453 case V4L2_PIX_FMT_RGB24:
1454 case V4L2_PIX_FMT_BGR24:
1455 case V4L2_PIX_FMT_RGB32:
1456 case V4L2_PIX_FMT_XRGB32:
1457 case V4L2_PIX_FMT_ARGB32:
1458 case V4L2_PIX_FMT_BGR32:
1459 case V4L2_PIX_FMT_XBGR32:
1460 case V4L2_PIX_FMT_ABGR32:
1461 case V4L2_PIX_FMT_NV12: /* 12 Y/CbCr 4:2:0 */
1462 case V4L2_PIX_FMT_NV12M:
1463 case V4L2_PIX_FMT_NV12MT:
1464 case V4L2_PIX_FMT_NV21: /* 12 Y/CrCb 4:2:0 */
1465 case V4L2_PIX_FMT_NV21M:
1466 case V4L2_PIX_FMT_NV16: /* 16 Y/CbCr 4:2:2 */
1467 case V4L2_PIX_FMT_NV16M:
1468 case V4L2_PIX_FMT_NV61: /* 16 Y/CrCb 4:2:2 */
1469 case V4L2_PIX_FMT_NV61M:
1470 case V4L2_PIX_FMT_NV24: /* 24 Y/CrCb 4:4:4 */
1471 case V4L2_PIX_FMT_YVU410:
1472 case V4L2_PIX_FMT_YUV410:
1473 case V4L2_PIX_FMT_YUV420: /* I420/IYUV */
1474 case V4L2_PIX_FMT_YUV420M:
1475 case V4L2_PIX_FMT_YUYV:
1476 case V4L2_PIX_FMT_YVU420:
1477 case V4L2_PIX_FMT_UYVY:
1478 case V4L2_PIX_FMT_YUV422P:
1479 case V4L2_PIX_FMT_YVYU:
1480 case V4L2_PIX_FMT_YUV411P:{
1481 GstVideoFormat format;
1482 format = gst_v4l2_object_v4l2fourcc_to_video_format (fourcc);
1483 if (format != GST_VIDEO_FORMAT_UNKNOWN)
1484 structure = gst_structure_new ("video/x-raw",
1485 "format", G_TYPE_STRING, gst_video_format_to_string (format), NULL);
1488 case V4L2_PIX_FMT_DV:
1490 gst_structure_new ("video/x-dv", "systemstream", G_TYPE_BOOLEAN, TRUE,
1493 case V4L2_PIX_FMT_MPEG: /* MPEG */
1494 structure = gst_structure_new ("video/mpegts",
1495 "systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
1497 case V4L2_PIX_FMT_WNVA: /* Winnov hw compres */
1499 case V4L2_PIX_FMT_SBGGR8:
1500 case V4L2_PIX_FMT_SGBRG8:
1501 case V4L2_PIX_FMT_SGRBG8:
1502 case V4L2_PIX_FMT_SRGGB8:
1503 structure = gst_structure_new ("video/x-bayer", "format", G_TYPE_STRING,
1504 fourcc == V4L2_PIX_FMT_SBGGR8 ? "bggr" :
1505 fourcc == V4L2_PIX_FMT_SGBRG8 ? "gbrg" :
1506 fourcc == V4L2_PIX_FMT_SGRBG8 ? "grbg" :
1507 /* fourcc == V4L2_PIX_FMT_SRGGB8 ? */ "rggb", NULL);
1509 case V4L2_PIX_FMT_SN9C10X:
1510 structure = gst_structure_new_empty ("video/x-sonix");
1512 case V4L2_PIX_FMT_PWC1:
1513 structure = gst_structure_new_empty ("video/x-pwc1");
1515 case V4L2_PIX_FMT_PWC2:
1516 structure = gst_structure_new_empty ("video/x-pwc2");
1518 case V4L2_PIX_FMT_RGB332:
1519 case V4L2_PIX_FMT_BGR666:
1520 case V4L2_PIX_FMT_ARGB555X:
1521 case V4L2_PIX_FMT_RGB565X:
1522 case V4L2_PIX_FMT_RGB444:
1523 case V4L2_PIX_FMT_YYUV: /* 16 YUV 4:2:2 */
1524 case V4L2_PIX_FMT_HI240: /* 8 8-bit color */
1525 case V4L2_PIX_FMT_Y4:
1526 case V4L2_PIX_FMT_Y6:
1527 case V4L2_PIX_FMT_Y10:
1528 case V4L2_PIX_FMT_Y12:
1529 case V4L2_PIX_FMT_Y10BPACK:
1530 case V4L2_PIX_FMT_YUV444:
1531 case V4L2_PIX_FMT_YUV555:
1532 case V4L2_PIX_FMT_YUV565:
1533 case V4L2_PIX_FMT_Y41P:
1534 case V4L2_PIX_FMT_YUV32:
1535 case V4L2_PIX_FMT_NV12MT_16X16:
1536 case V4L2_PIX_FMT_NV42:
1537 case V4L2_PIX_FMT_H264_MVC:
1539 GST_DEBUG ("Unsupported fourcc 0x%08x %" GST_FOURCC_FORMAT,
1540 fourcc, GST_FOURCC_ARGS (fourcc));
1548 gst_v4l2_object_v4l2fourcc_to_structure (guint32 fourcc)
1550 GstStructure *template;
1553 template = gst_v4l2_object_v4l2fourcc_to_bare_struct (fourcc);
1555 if (template == NULL)
1558 for (i = 0; i < GST_V4L2_FORMAT_COUNT; i++) {
1559 if (gst_v4l2_formats[i].format != fourcc)
1562 if (gst_v4l2_formats[i].dimensions) {
1563 gst_structure_set (template,
1564 "width", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1565 "height", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1566 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
1577 gst_v4l2_object_get_caps_helper (GstV4L2FormatFlags flags)
1579 GstStructure *structure;
1583 caps = gst_caps_new_empty ();
1584 for (i = 0; i < GST_V4L2_FORMAT_COUNT; i++) {
1586 if ((gst_v4l2_formats[i].flags & flags) == 0)
1590 gst_v4l2_object_v4l2fourcc_to_bare_struct (gst_v4l2_formats[i].format);
1593 GstStructure *alt_s = NULL;
1595 if (gst_v4l2_formats[i].dimensions) {
1596 gst_structure_set (structure,
1597 "width", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1598 "height", GST_TYPE_INT_RANGE, 1, GST_V4L2_MAX_SIZE,
1599 "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
1602 switch (gst_v4l2_formats[i].format) {
1603 case V4L2_PIX_FMT_RGB32:
1604 alt_s = gst_structure_copy (structure);
1605 gst_structure_set (alt_s, "format", G_TYPE_STRING, "ARGB", NULL);
1607 case V4L2_PIX_FMT_BGR32:
1608 alt_s = gst_structure_copy (structure);
1609 gst_structure_set (alt_s, "format", G_TYPE_STRING, "BGRA", NULL);
1614 gst_caps_append_structure (caps, structure);
1617 gst_caps_append_structure (caps, alt_s);
1621 return gst_caps_simplify (caps);
1625 gst_v4l2_object_get_all_caps (void)
1627 static GstCaps *caps = NULL;
1629 if (g_once_init_enter (&caps)) {
1630 GstCaps *all_caps = gst_v4l2_object_get_caps_helper (GST_V4L2_ALL);
1631 GST_MINI_OBJECT_FLAG_SET (all_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
1632 g_once_init_leave (&caps, all_caps);
1639 gst_v4l2_object_get_raw_caps (void)
1641 static GstCaps *caps = NULL;
1643 if (g_once_init_enter (&caps)) {
1644 GstCaps *raw_caps = gst_v4l2_object_get_caps_helper (GST_V4L2_RAW);
1645 GST_MINI_OBJECT_FLAG_SET (raw_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
1646 g_once_init_leave (&caps, raw_caps);
1653 gst_v4l2_object_get_codec_caps (void)
1655 static GstCaps *caps = NULL;
1657 if (g_once_init_enter (&caps)) {
1658 GstCaps *codec_caps = gst_v4l2_object_get_caps_helper (GST_V4L2_CODEC);
1659 GST_MINI_OBJECT_FLAG_SET (codec_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
1660 g_once_init_leave (&caps, codec_caps);
1666 /* collect data for the given caps
1667 * @caps: given input caps
1668 * @format: location for the v4l format
1669 * @w/@h: location for width and height
1670 * @fps_n/@fps_d: location for framerate
1671 * @size: location for expected size of the frame or 0 if unknown
1674 gst_v4l2_object_get_caps_info (GstV4l2Object * v4l2object, GstCaps * caps,
1675 struct v4l2_fmtdesc **format, GstVideoInfo * info)
1677 GstStructure *structure;
1678 guint32 fourcc = 0, fourcc_nc = 0;
1679 const gchar *mimetype;
1680 struct v4l2_fmtdesc *fmt = NULL;
1682 structure = gst_caps_get_structure (caps, 0);
1684 mimetype = gst_structure_get_name (structure);
1686 if (!gst_video_info_from_caps (info, caps))
1687 goto invalid_format;
1689 if (g_str_equal (mimetype, "video/x-raw")) {
1690 switch (GST_VIDEO_INFO_FORMAT (info)) {
1691 case GST_VIDEO_FORMAT_I420:
1692 fourcc = V4L2_PIX_FMT_YUV420;
1693 fourcc_nc = V4L2_PIX_FMT_YUV420M;
1695 case GST_VIDEO_FORMAT_YUY2:
1696 fourcc = V4L2_PIX_FMT_YUYV;
1698 case GST_VIDEO_FORMAT_UYVY:
1699 fourcc = V4L2_PIX_FMT_UYVY;
1701 case GST_VIDEO_FORMAT_YV12:
1702 fourcc = V4L2_PIX_FMT_YVU420;
1704 case GST_VIDEO_FORMAT_Y41B:
1705 fourcc = V4L2_PIX_FMT_YUV411P;
1707 case GST_VIDEO_FORMAT_Y42B:
1708 fourcc = V4L2_PIX_FMT_YUV422P;
1710 case GST_VIDEO_FORMAT_NV12:
1711 fourcc = V4L2_PIX_FMT_NV12;
1712 fourcc_nc = V4L2_PIX_FMT_NV12M;
1714 case GST_VIDEO_FORMAT_NV12_64Z32:
1715 fourcc_nc = V4L2_PIX_FMT_NV12MT;
1717 case GST_VIDEO_FORMAT_NV21:
1718 fourcc = V4L2_PIX_FMT_NV21;
1719 fourcc_nc = V4L2_PIX_FMT_NV21M;
1721 case GST_VIDEO_FORMAT_NV16:
1722 fourcc = V4L2_PIX_FMT_NV16;
1723 fourcc_nc = V4L2_PIX_FMT_NV16M;
1725 case GST_VIDEO_FORMAT_NV61:
1726 fourcc = V4L2_PIX_FMT_NV61;
1727 fourcc_nc = V4L2_PIX_FMT_NV61M;
1729 case GST_VIDEO_FORMAT_NV24:
1730 fourcc = V4L2_PIX_FMT_NV24;
1732 case GST_VIDEO_FORMAT_YVYU:
1733 fourcc = V4L2_PIX_FMT_YVYU;
1735 case GST_VIDEO_FORMAT_RGB15:
1736 fourcc = V4L2_PIX_FMT_RGB555;
1737 fourcc_nc = V4L2_PIX_FMT_XRGB555;
1739 case GST_VIDEO_FORMAT_RGB16:
1740 fourcc = V4L2_PIX_FMT_RGB565;
1742 case GST_VIDEO_FORMAT_RGB:
1743 fourcc = V4L2_PIX_FMT_RGB24;
1745 case GST_VIDEO_FORMAT_BGR:
1746 fourcc = V4L2_PIX_FMT_BGR24;
1748 case GST_VIDEO_FORMAT_xRGB:
1749 fourcc = V4L2_PIX_FMT_RGB32;
1750 fourcc_nc = V4L2_PIX_FMT_XRGB32;
1752 case GST_VIDEO_FORMAT_ARGB:
1753 fourcc = V4L2_PIX_FMT_RGB32;
1754 fourcc_nc = V4L2_PIX_FMT_ARGB32;
1756 case GST_VIDEO_FORMAT_BGRx:
1757 fourcc = V4L2_PIX_FMT_BGR32;
1758 fourcc_nc = V4L2_PIX_FMT_XBGR32;
1760 case GST_VIDEO_FORMAT_BGRA:
1761 fourcc = V4L2_PIX_FMT_BGR32;
1762 fourcc_nc = V4L2_PIX_FMT_ABGR32;
1764 case GST_VIDEO_FORMAT_GRAY8:
1765 fourcc = V4L2_PIX_FMT_GREY;
1767 case GST_VIDEO_FORMAT_GRAY16_LE:
1768 fourcc = V4L2_PIX_FMT_Y16;
1770 case GST_VIDEO_FORMAT_GRAY16_BE:
1771 fourcc = V4L2_PIX_FMT_Y16_BE;
1777 if (g_str_equal (mimetype, "video/mpegts")) {
1778 fourcc = V4L2_PIX_FMT_MPEG;
1779 } else if (g_str_equal (mimetype, "video/x-dv")) {
1780 fourcc = V4L2_PIX_FMT_DV;
1781 } else if (g_str_equal (mimetype, "image/jpeg")) {
1782 fourcc = V4L2_PIX_FMT_JPEG;
1783 } else if (g_str_equal (mimetype, "video/mpeg")) {
1785 if (gst_structure_get_int (structure, "mpegversion", &version)) {
1788 fourcc = V4L2_PIX_FMT_MPEG1;
1791 fourcc = V4L2_PIX_FMT_MPEG2;
1794 fourcc = V4L2_PIX_FMT_MPEG4;
1795 fourcc_nc = V4L2_PIX_FMT_XVID;
1801 } else if (g_str_equal (mimetype, "video/x-h263")) {
1802 fourcc = V4L2_PIX_FMT_H263;
1803 } else if (g_str_equal (mimetype, "video/x-h264")) {
1804 const gchar *stream_format =
1805 gst_structure_get_string (structure, "stream-format");
1806 if (g_str_equal (stream_format, "avc"))
1807 fourcc = V4L2_PIX_FMT_H264_NO_SC;
1809 fourcc = V4L2_PIX_FMT_H264;
1810 } else if (g_str_equal (mimetype, "video/x-vp8")) {
1811 fourcc = V4L2_PIX_FMT_VP8;
1812 } else if (g_str_equal (mimetype, "video/x-vp9")) {
1813 fourcc = V4L2_PIX_FMT_VP9;
1814 } else if (g_str_equal (mimetype, "video/x-bayer")) {
1815 const gchar *format = gst_structure_get_string (structure, "format");
1817 if (!g_ascii_strcasecmp (format, "bggr"))
1818 fourcc = V4L2_PIX_FMT_SBGGR8;
1819 else if (!g_ascii_strcasecmp (format, "gbrg"))
1820 fourcc = V4L2_PIX_FMT_SGBRG8;
1821 else if (!g_ascii_strcasecmp (format, "grbg"))
1822 fourcc = V4L2_PIX_FMT_SGRBG8;
1823 else if (!g_ascii_strcasecmp (format, "rggb"))
1824 fourcc = V4L2_PIX_FMT_SRGGB8;
1826 } else if (g_str_equal (mimetype, "video/x-sonix")) {
1827 fourcc = V4L2_PIX_FMT_SN9C10X;
1828 } else if (g_str_equal (mimetype, "video/x-pwc1")) {
1829 fourcc = V4L2_PIX_FMT_PWC1;
1830 } else if (g_str_equal (mimetype, "video/x-pwc2")) {
1831 fourcc = V4L2_PIX_FMT_PWC2;
1836 /* Prefer the non-contiguous if supported */
1837 v4l2object->prefered_non_contiguous = TRUE;
1840 fmt = gst_v4l2_object_get_format_from_fourcc (v4l2object, fourcc_nc);
1841 else if (fourcc == 0)
1842 goto unhandled_format;
1845 fmt = gst_v4l2_object_get_format_from_fourcc (v4l2object, fourcc);
1846 v4l2object->prefered_non_contiguous = FALSE;
1850 goto unsupported_format;
1859 GST_DEBUG_OBJECT (v4l2object, "invalid format");
1864 GST_DEBUG_OBJECT (v4l2object, "unhandled format");
1869 GST_DEBUG_OBJECT (v4l2object, "unsupported format");
1875 gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
1876 guint32 pixelformat, gint * width, gint * height);
1879 gst_v4l2_object_add_aspect_ratio (GstV4l2Object * v4l2object, GstStructure * s)
1881 if (v4l2object->keep_aspect && v4l2object->par)
1882 gst_structure_set_value (s, "pixel-aspect-ratio", v4l2object->par);
1885 /* returns TRUE if the value was changed in place, otherwise FALSE */
1887 gst_v4l2src_value_simplify (GValue * val)
1889 /* simplify list of one value to one value */
1890 if (GST_VALUE_HOLDS_LIST (val) && gst_value_list_get_size (val) == 1) {
1891 const GValue *list_val;
1892 GValue new_val = G_VALUE_INIT;
1894 list_val = gst_value_list_get_value (val, 0);
1895 g_value_init (&new_val, G_VALUE_TYPE (list_val));
1896 g_value_copy (list_val, &new_val);
1897 g_value_unset (val);
1906 gst_v4l2_object_get_interlace_mode (enum v4l2_field field,
1907 GstVideoInterlaceMode * interlace_mode)
1909 /* NB: If you add new return values, please fix mode_strings in
1910 * gst_v4l2_object_add_interlace_mode */
1912 case V4L2_FIELD_ANY:
1914 ("Driver bug detected - check driver with v4l2-compliance from http://git.linuxtv.org/v4l-utils.git\n");
1916 case V4L2_FIELD_NONE:
1917 *interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
1919 case V4L2_FIELD_INTERLACED:
1920 case V4L2_FIELD_INTERLACED_TB:
1921 case V4L2_FIELD_INTERLACED_BT:
1922 *interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
1925 GST_ERROR ("Unknown enum v4l2_field %d", field);
1931 gst_v4l2_object_get_colorspace (struct v4l2_format *fmt,
1932 GstVideoColorimetry * cinfo)
1935 gst_v4l2_object_v4l2fourcc_is_rgb (fmt->fmt.pix.pixelformat);
1936 enum v4l2_colorspace colorspace;
1937 enum v4l2_quantization range;
1938 enum v4l2_ycbcr_encoding matrix;
1939 enum v4l2_xfer_func transfer;
1940 gboolean ret = TRUE;
1942 if (V4L2_TYPE_IS_MULTIPLANAR (fmt->type)) {
1943 colorspace = fmt->fmt.pix_mp.colorspace;
1944 range = fmt->fmt.pix_mp.quantization;
1945 matrix = fmt->fmt.pix_mp.ycbcr_enc;
1946 transfer = fmt->fmt.pix_mp.xfer_func;
1948 colorspace = fmt->fmt.pix.colorspace;
1949 range = fmt->fmt.pix.quantization;
1950 matrix = fmt->fmt.pix.ycbcr_enc;
1951 transfer = fmt->fmt.pix.xfer_func;
1954 /* First step, set the defaults for each primaries */
1955 switch (colorspace) {
1956 case V4L2_COLORSPACE_SMPTE170M:
1957 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1958 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
1959 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
1960 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_SMPTE170M;
1962 case V4L2_COLORSPACE_REC709:
1963 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1964 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT709;
1965 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
1966 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT709;
1968 case V4L2_COLORSPACE_SRGB:
1969 case V4L2_COLORSPACE_JPEG:
1970 cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
1971 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
1972 cinfo->transfer = GST_VIDEO_TRANSFER_SRGB;
1973 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT709;
1975 case V4L2_COLORSPACE_ADOBERGB:
1976 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1977 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
1978 cinfo->transfer = GST_VIDEO_TRANSFER_ADOBERGB;
1979 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_ADOBERGB;
1981 case V4L2_COLORSPACE_BT2020:
1982 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1983 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT2020;
1984 cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12;
1985 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT2020;
1987 case V4L2_COLORSPACE_SMPTE240M:
1988 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1989 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_SMPTE240M;
1990 cinfo->transfer = GST_VIDEO_TRANSFER_SMPTE240M;
1991 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_SMPTE240M;
1993 case V4L2_COLORSPACE_470_SYSTEM_M:
1994 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
1995 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
1996 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
1997 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT470M;
1999 case V4L2_COLORSPACE_470_SYSTEM_BG:
2000 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2001 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
2002 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
2003 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT470BG;
2005 case V4L2_COLORSPACE_RAW:
2006 /* Explicitly unknown */
2007 cinfo->range = GST_VIDEO_COLOR_RANGE_UNKNOWN;
2008 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_UNKNOWN;
2009 cinfo->transfer = GST_VIDEO_TRANSFER_UNKNOWN;
2010 cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_UNKNOWN;
2013 GST_DEBUG ("Unknown enum v4l2_colorspace %d", colorspace);
2021 /* Second step, apply any custom variation */
2023 case V4L2_QUANTIZATION_FULL_RANGE:
2024 cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
2026 case V4L2_QUANTIZATION_LIM_RANGE:
2027 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2029 case V4L2_QUANTIZATION_DEFAULT:
2030 /* replicated V4L2_MAP_QUANTIZATION_DEFAULT macro behavior */
2031 if (is_rgb && colorspace == V4L2_COLORSPACE_BT2020)
2032 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2033 else if (is_rgb || matrix == V4L2_YCBCR_ENC_XV601
2034 || matrix == V4L2_YCBCR_ENC_XV709
2035 || colorspace == V4L2_COLORSPACE_JPEG)
2036 cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
2038 cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
2041 GST_WARNING ("Unknown enum v4l2_quantization value %d", range);
2042 cinfo->range = GST_VIDEO_COLOR_RANGE_UNKNOWN;
2047 case V4L2_YCBCR_ENC_XV601:
2048 case V4L2_YCBCR_ENC_SYCC:
2049 GST_FIXME ("XV601 and SYCC not defined, assuming 601");
2051 case V4L2_YCBCR_ENC_601:
2052 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
2054 case V4L2_YCBCR_ENC_XV709:
2055 GST_FIXME ("XV709 not defined, assuming 709");
2057 case V4L2_YCBCR_ENC_709:
2058 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT709;
2060 case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
2061 GST_FIXME ("BT2020 with constant luma is not defined, assuming BT2020");
2063 case V4L2_YCBCR_ENC_BT2020:
2064 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT2020;
2066 case V4L2_YCBCR_ENC_SMPTE240M:
2067 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_SMPTE240M;
2069 case V4L2_YCBCR_ENC_DEFAULT:
2070 /* nothing, just use defaults for colorspace */
2073 GST_WARNING ("Unknown enum v4l2_ycbcr_encoding value %d", matrix);
2074 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_UNKNOWN;
2078 /* Set identity matrix for R'G'B' formats to avoid creating
2079 * confusion. This though is cosmetic as it's now properly ignored by
2080 * the video info API and videoconvert. */
2082 cinfo->matrix = GST_VIDEO_COLOR_MATRIX_RGB;
2085 case V4L2_XFER_FUNC_709:
2086 if (colorspace == V4L2_COLORSPACE_BT2020 && fmt->fmt.pix.height >= 2160)
2087 cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12;
2089 cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
2091 case V4L2_XFER_FUNC_SRGB:
2092 cinfo->transfer = GST_VIDEO_TRANSFER_SRGB;
2094 case V4L2_XFER_FUNC_ADOBERGB:
2095 cinfo->transfer = GST_VIDEO_TRANSFER_ADOBERGB;
2097 case V4L2_XFER_FUNC_SMPTE240M:
2098 cinfo->transfer = GST_VIDEO_TRANSFER_SMPTE240M;
2100 case V4L2_XFER_FUNC_NONE:
2101 cinfo->transfer = GST_VIDEO_TRANSFER_GAMMA10;
2103 case V4L2_XFER_FUNC_DEFAULT:
2104 /* nothing, just use defaults for colorspace */
2107 GST_WARNING ("Unknown enum v4l2_xfer_func value %d", transfer);
2108 cinfo->transfer = GST_VIDEO_TRANSFER_UNKNOWN;
2117 gst_v4l2_object_try_fmt (GstV4l2Object * v4l2object,
2118 struct v4l2_format *try_fmt)
2120 int fd = v4l2object->video_fd;
2121 struct v4l2_format fmt;
2124 memcpy (&fmt, try_fmt, sizeof (fmt));
2125 r = v4l2object->ioctl (fd, VIDIOC_TRY_FMT, &fmt);
2127 if (r < 0 && errno == ENOTTY) {
2128 /* The driver might not implement TRY_FMT, in which case we will try
2130 if (GST_V4L2_IS_ACTIVE (v4l2object))
2133 memcpy (&fmt, try_fmt, sizeof (fmt));
2134 r = v4l2object->ioctl (fd, VIDIOC_S_FMT, &fmt);
2136 memcpy (try_fmt, &fmt, sizeof (fmt));
2141 memcpy (try_fmt, &fmt, sizeof (fmt));
2142 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2143 "Unable to try format: %s", g_strerror (errno));
2149 gst_v4l2_object_add_interlace_mode (GstV4l2Object * v4l2object,
2150 GstStructure * s, guint32 width, guint32 height, guint32 pixelformat)
2152 struct v4l2_format fmt;
2153 GValue interlace_formats = { 0, };
2154 GstVideoInterlaceMode interlace_mode, prev = -1;
2156 const gchar *mode_strings[] = { "progressive",
2161 if (!g_str_equal (gst_structure_get_name (s), "video/x-raw"))
2164 if (v4l2object->never_interlaced) {
2165 gst_structure_set (s, "interlace-mode", G_TYPE_STRING, "progressive", NULL);
2169 g_value_init (&interlace_formats, GST_TYPE_LIST);
2171 /* Try twice - once for NONE, once for INTERLACED. */
2172 memset (&fmt, 0, sizeof (fmt));
2173 fmt.type = v4l2object->type;
2174 fmt.fmt.pix.width = width;
2175 fmt.fmt.pix.height = height;
2176 fmt.fmt.pix.pixelformat = pixelformat;
2177 fmt.fmt.pix.field = V4L2_FIELD_NONE;
2179 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0 &&
2180 gst_v4l2_object_get_interlace_mode (fmt.fmt.pix.field, &interlace_mode)) {
2181 GValue interlace_enum = { 0, };
2182 g_value_init (&interlace_enum, G_TYPE_STRING);
2183 g_value_set_string (&interlace_enum, mode_strings[interlace_mode]);
2184 gst_value_list_append_and_take_value (&interlace_formats, &interlace_enum);
2185 prev = interlace_mode;
2188 memset (&fmt, 0, sizeof (fmt));
2189 fmt.type = v4l2object->type;
2190 fmt.fmt.pix.width = width;
2191 fmt.fmt.pix.height = height;
2192 fmt.fmt.pix.pixelformat = pixelformat;
2193 fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
2195 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0 &&
2196 gst_v4l2_object_get_interlace_mode (fmt.fmt.pix.field, &interlace_mode) &&
2197 prev != interlace_mode) {
2198 GValue interlace_enum = { 0, };
2199 g_value_init (&interlace_enum, G_TYPE_STRING);
2200 g_value_set_string (&interlace_enum, mode_strings[interlace_mode]);
2201 gst_value_list_append_and_take_value (&interlace_formats, &interlace_enum);
2204 if (gst_v4l2src_value_simplify (&interlace_formats)
2205 || gst_value_list_get_size (&interlace_formats) > 0)
2206 gst_structure_take_value (s, "interlace-mode", &interlace_formats);
2208 GST_WARNING_OBJECT (v4l2object, "Failed to determine interlace mode");
2214 gst_v4l2_object_fill_colorimetry_list (GValue * list,
2215 GstVideoColorimetry * cinfo)
2217 GValue colorimetry = G_VALUE_INIT;
2220 gboolean found = FALSE;
2222 g_value_init (&colorimetry, G_TYPE_STRING);
2223 g_value_take_string (&colorimetry, gst_video_colorimetry_to_string (cinfo));
2225 /* only insert if no duplicate */
2226 size = gst_value_list_get_size (list);
2227 for (i = 0; i < size; i++) {
2230 tmp = gst_value_list_get_value (list, i);
2231 if (gst_value_compare (&colorimetry, tmp) == GST_VALUE_EQUAL) {
2238 gst_value_list_append_and_take_value (list, &colorimetry);
2240 g_value_unset (&colorimetry);
2244 gst_v4l2_object_add_colorspace (GstV4l2Object * v4l2object, GstStructure * s,
2245 guint32 width, guint32 height, guint32 pixelformat)
2247 struct v4l2_format fmt;
2248 GValue list = G_VALUE_INIT;
2249 GstVideoColorimetry cinfo;
2250 enum v4l2_colorspace req_cspace;
2252 memset (&fmt, 0, sizeof (fmt));
2253 fmt.type = v4l2object->type;
2254 fmt.fmt.pix.width = width;
2255 fmt.fmt.pix.height = height;
2256 fmt.fmt.pix.pixelformat = pixelformat;
2258 g_value_init (&list, GST_TYPE_LIST);
2260 /* step 1: get device default colorspace and insert it first as
2261 * it should be the preferred one */
2262 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0) {
2263 if (gst_v4l2_object_get_colorspace (&fmt, &cinfo))
2264 gst_v4l2_object_fill_colorimetry_list (&list, &cinfo);
2267 /* step 2: probe all colorspace other than default
2268 * We don't probe all colorspace, range, matrix and transfer combination to
2269 * avoid ioctl flooding which could greatly increase initialization time
2270 * with low-speed devices (UVC...) */
2271 for (req_cspace = V4L2_COLORSPACE_SMPTE170M;
2272 req_cspace <= V4L2_COLORSPACE_RAW; req_cspace++) {
2273 /* V4L2_COLORSPACE_BT878 is deprecated and shall not be used, so skip */
2274 if (req_cspace == V4L2_COLORSPACE_BT878)
2277 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
2278 fmt.fmt.pix_mp.colorspace = req_cspace;
2280 fmt.fmt.pix.colorspace = req_cspace;
2282 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) == 0) {
2283 enum v4l2_colorspace colorspace;
2285 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
2286 colorspace = fmt.fmt.pix_mp.colorspace;
2288 colorspace = fmt.fmt.pix.colorspace;
2290 if (colorspace == req_cspace) {
2291 if (gst_v4l2_object_get_colorspace (&fmt, &cinfo))
2292 gst_v4l2_object_fill_colorimetry_list (&list, &cinfo);
2297 if (gst_value_list_get_size (&list) > 0)
2298 gst_structure_take_value (s, "colorimetry", &list);
2300 g_value_unset (&list);
2305 /* The frame interval enumeration code first appeared in Linux 2.6.19. */
2306 static GstStructure *
2307 gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
2308 guint32 pixelformat,
2309 guint32 width, guint32 height, const GstStructure * template)
2311 gint fd = v4l2object->video_fd;
2312 struct v4l2_frmivalenum ival;
2315 GValue rates = { 0, };
2317 memset (&ival, 0, sizeof (struct v4l2_frmivalenum));
2319 ival.pixel_format = pixelformat;
2321 ival.height = height;
2323 GST_LOG_OBJECT (v4l2object->dbg_obj,
2324 "get frame interval for %ux%u, %" GST_FOURCC_FORMAT, width, height,
2325 GST_FOURCC_ARGS (pixelformat));
2327 /* keep in mind that v4l2 gives us frame intervals (durations); we invert the
2328 * fraction to get framerate */
2329 if (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) < 0)
2330 goto enum_frameintervals_failed;
2332 if (ival.type == V4L2_FRMIVAL_TYPE_DISCRETE) {
2333 GValue rate = { 0, };
2335 g_value_init (&rates, GST_TYPE_LIST);
2336 g_value_init (&rate, GST_TYPE_FRACTION);
2339 num = ival.discrete.numerator;
2340 denom = ival.discrete.denominator;
2342 if (num > G_MAXINT || denom > G_MAXINT) {
2343 /* let us hope we don't get here... */
2348 GST_LOG_OBJECT (v4l2object->dbg_obj, "adding discrete framerate: %d/%d",
2351 /* swap to get the framerate */
2352 gst_value_set_fraction (&rate, denom, num);
2353 gst_value_list_append_value (&rates, &rate);
2356 } while (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) >= 0);
2357 } else if (ival.type == V4L2_FRMIVAL_TYPE_STEPWISE) {
2358 GValue min = { 0, };
2359 GValue step = { 0, };
2360 GValue max = { 0, };
2361 gboolean added = FALSE;
2362 guint32 minnum, mindenom;
2363 guint32 maxnum, maxdenom;
2365 g_value_init (&rates, GST_TYPE_LIST);
2367 g_value_init (&min, GST_TYPE_FRACTION);
2368 g_value_init (&step, GST_TYPE_FRACTION);
2369 g_value_init (&max, GST_TYPE_FRACTION);
2372 minnum = ival.stepwise.min.numerator;
2373 mindenom = ival.stepwise.min.denominator;
2374 if (minnum > G_MAXINT || mindenom > G_MAXINT) {
2378 GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise min frame interval: %d/%d",
2380 gst_value_set_fraction (&min, minnum, mindenom);
2383 maxnum = ival.stepwise.max.numerator;
2384 maxdenom = ival.stepwise.max.denominator;
2385 if (maxnum > G_MAXINT || maxdenom > G_MAXINT) {
2390 GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise max frame interval: %d/%d",
2392 gst_value_set_fraction (&max, maxnum, maxdenom);
2395 num = ival.stepwise.step.numerator;
2396 denom = ival.stepwise.step.denominator;
2397 if (num > G_MAXINT || denom > G_MAXINT) {
2402 if (num == 0 || denom == 0) {
2403 /* in this case we have a wrong fraction or no step, set the step to max
2404 * so that we only add the min value in the loop below */
2409 /* since we only have gst_value_fraction_subtract and not add, negate the
2411 GST_LOG_OBJECT (v4l2object->dbg_obj, "stepwise step frame interval: %d/%d",
2413 gst_value_set_fraction (&step, -num, denom);
2415 while (gst_value_compare (&min, &max) != GST_VALUE_GREATER_THAN) {
2416 GValue rate = { 0, };
2418 num = gst_value_get_fraction_numerator (&min);
2419 denom = gst_value_get_fraction_denominator (&min);
2420 GST_LOG_OBJECT (v4l2object->dbg_obj, "adding stepwise framerate: %d/%d",
2423 /* invert to get the framerate */
2424 g_value_init (&rate, GST_TYPE_FRACTION);
2425 gst_value_set_fraction (&rate, denom, num);
2426 gst_value_list_append_value (&rates, &rate);
2429 /* we're actually adding because step was negated above. This is because
2430 * there is no _add function... */
2431 if (!gst_value_fraction_subtract (&min, &min, &step)) {
2432 GST_WARNING_OBJECT (v4l2object->dbg_obj, "could not step fraction!");
2437 /* no range was added, leave the default range from the template */
2438 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2439 "no range added, leaving default");
2440 g_value_unset (&rates);
2442 } else if (ival.type == V4L2_FRMIVAL_TYPE_CONTINUOUS) {
2443 guint32 maxnum, maxdenom;
2445 g_value_init (&rates, GST_TYPE_FRACTION_RANGE);
2447 num = ival.stepwise.min.numerator;
2448 denom = ival.stepwise.min.denominator;
2449 if (num > G_MAXINT || denom > G_MAXINT) {
2454 maxnum = ival.stepwise.max.numerator;
2455 maxdenom = ival.stepwise.max.denominator;
2456 if (maxnum > G_MAXINT || maxdenom > G_MAXINT) {
2461 GST_LOG_OBJECT (v4l2object->dbg_obj,
2462 "continuous frame interval %d/%d to %d/%d", maxdenom, maxnum, denom,
2465 gst_value_set_fraction_range_full (&rates, maxdenom, maxnum, denom, num);
2471 s = gst_structure_copy (template);
2472 gst_structure_set (s, "width", G_TYPE_INT, (gint) width,
2473 "height", G_TYPE_INT, (gint) height, NULL);
2475 gst_v4l2_object_add_aspect_ratio (v4l2object, s);
2477 if (!v4l2object->skip_try_fmt_probes) {
2478 gst_v4l2_object_add_interlace_mode (v4l2object, s, width, height,
2480 gst_v4l2_object_add_colorspace (v4l2object, s, width, height, pixelformat);
2483 if (G_IS_VALUE (&rates)) {
2484 gst_v4l2src_value_simplify (&rates);
2485 /* only change the framerate on the template when we have a valid probed new
2487 gst_structure_take_value (s, "framerate", &rates);
2488 } else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2489 v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
2490 gst_structure_set (s, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT,
2496 enum_frameintervals_failed:
2498 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2499 "Unable to enumerate intervals for %" GST_FOURCC_FORMAT "@%ux%u",
2500 GST_FOURCC_ARGS (pixelformat), width, height);
2505 /* I don't see how this is actually an error, we ignore the format then */
2506 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2507 "Unknown frame interval type at %" GST_FOURCC_FORMAT "@%ux%u: %u",
2508 GST_FOURCC_ARGS (pixelformat), width, height, ival.type);
2514 sort_by_frame_size (GstStructure * s1, GstStructure * s2)
2518 gst_structure_get_int (s1, "width", &w1);
2519 gst_structure_get_int (s1, "height", &h1);
2520 gst_structure_get_int (s2, "width", &w2);
2521 gst_structure_get_int (s2, "height", &h2);
2523 /* I think it's safe to assume that this won't overflow for a while */
2524 return ((w2 * h2) - (w1 * h1));
2528 gst_v4l2_object_update_and_append (GstV4l2Object * v4l2object,
2529 guint32 format, GstCaps * caps, GstStructure * s)
2531 GstStructure *alt_s = NULL;
2533 /* Encoded stream on output buffer need to be parsed */
2534 if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
2535 v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
2538 for (; i < GST_V4L2_FORMAT_COUNT; i++) {
2539 if (format == gst_v4l2_formats[i].format &&
2540 gst_v4l2_formats[i].flags & GST_V4L2_CODEC &&
2541 !(gst_v4l2_formats[i].flags & GST_V4L2_NO_PARSE)) {
2542 gst_structure_set (s, "parsed", G_TYPE_BOOLEAN, TRUE, NULL);
2548 if (v4l2object->has_alpha_component &&
2549 (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2550 v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) {
2552 case V4L2_PIX_FMT_RGB32:
2553 alt_s = gst_structure_copy (s);
2554 gst_structure_set (alt_s, "format", G_TYPE_STRING, "ARGB", NULL);
2556 case V4L2_PIX_FMT_BGR32:
2557 alt_s = gst_structure_copy (s);
2558 gst_structure_set (alt_s, "format", G_TYPE_STRING, "BGRA", NULL);
2565 gst_caps_append_structure (caps, s);
2568 gst_caps_append_structure (caps, alt_s);
2572 gst_v4l2_object_probe_caps_for_format (GstV4l2Object * v4l2object,
2573 guint32 pixelformat, const GstStructure * template)
2575 GstCaps *ret = gst_caps_new_empty ();
2577 gint fd = v4l2object->video_fd;
2578 struct v4l2_frmsizeenum size;
2579 GList *results = NULL;
2582 if (pixelformat == GST_MAKE_FOURCC ('M', 'P', 'E', 'G')) {
2583 gst_caps_append_structure (ret, gst_structure_copy (template));
2587 memset (&size, 0, sizeof (struct v4l2_frmsizeenum));
2589 size.pixel_format = pixelformat;
2591 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2592 "Enumerating frame sizes for %" GST_FOURCC_FORMAT,
2593 GST_FOURCC_ARGS (pixelformat));
2595 if (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) < 0)
2596 goto enum_framesizes_failed;
2598 if (size.type == V4L2_FRMSIZE_TYPE_DISCRETE) {
2600 GST_LOG_OBJECT (v4l2object->dbg_obj, "got discrete frame size %dx%d",
2601 size.discrete.width, size.discrete.height);
2603 w = MIN (size.discrete.width, G_MAXINT);
2604 h = MIN (size.discrete.height, G_MAXINT);
2608 gst_v4l2_object_probe_caps_for_format_and_size (v4l2object,
2609 pixelformat, w, h, template);
2612 results = g_list_prepend (results, tmp);
2616 } while (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) >= 0);
2617 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2618 "done iterating discrete frame sizes");
2619 } else if (size.type == V4L2_FRMSIZE_TYPE_STEPWISE) {
2620 guint32 maxw, maxh, step_w, step_h;
2622 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "we have stepwise frame sizes:");
2623 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min width: %d",
2624 size.stepwise.min_width);
2625 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2626 size.stepwise.min_height);
2627 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "max width: %d",
2628 size.stepwise.max_width);
2629 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2630 size.stepwise.max_height);
2631 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "step width: %d",
2632 size.stepwise.step_width);
2633 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "step height: %d",
2634 size.stepwise.step_height);
2636 w = MAX (size.stepwise.min_width, 1);
2637 h = MAX (size.stepwise.min_height, 1);
2638 maxw = MIN (size.stepwise.max_width, G_MAXINT);
2639 maxh = MIN (size.stepwise.max_height, G_MAXINT);
2641 step_w = MAX (size.stepwise.step_width, 1);
2642 step_h = MAX (size.stepwise.step_height, 1);
2644 /* FIXME: check for sanity and that min/max are multiples of the steps */
2646 /* we only query details for the max width/height since it's likely the
2647 * most restricted if there are any resolution-dependent restrictions */
2648 tmp = gst_v4l2_object_probe_caps_for_format_and_size (v4l2object,
2649 pixelformat, maxw, maxh, template);
2652 GValue step_range = G_VALUE_INIT;
2654 g_value_init (&step_range, GST_TYPE_INT_RANGE);
2655 gst_value_set_int_range_step (&step_range, w, maxw, step_w);
2656 gst_structure_set_value (tmp, "width", &step_range);
2658 gst_value_set_int_range_step (&step_range, h, maxh, step_h);
2659 gst_structure_take_value (tmp, "height", &step_range);
2661 /* no point using the results list here, since there's only one struct */
2662 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
2664 } else if (size.type == V4L2_FRMSIZE_TYPE_CONTINUOUS) {
2667 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "we have continuous frame sizes:");
2668 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min width: %d",
2669 size.stepwise.min_width);
2670 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2671 size.stepwise.min_height);
2672 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "max width: %d",
2673 size.stepwise.max_width);
2674 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "min height: %d",
2675 size.stepwise.max_height);
2677 w = MAX (size.stepwise.min_width, 1);
2678 h = MAX (size.stepwise.min_height, 1);
2679 maxw = MIN (size.stepwise.max_width, G_MAXINT);
2680 maxh = MIN (size.stepwise.max_height, G_MAXINT);
2683 gst_v4l2_object_probe_caps_for_format_and_size (v4l2object, pixelformat,
2686 gst_structure_set (tmp, "width", GST_TYPE_INT_RANGE, (gint) w,
2687 (gint) maxw, "height", GST_TYPE_INT_RANGE, (gint) h, (gint) maxh,
2690 /* no point using the results list here, since there's only one struct */
2691 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
2697 /* we use an intermediary list to store and then sort the results of the
2698 * probing because we can't make any assumptions about the order in which
2699 * the driver will give us the sizes, but we want the final caps to contain
2700 * the results starting with the highest resolution and having the lowest
2701 * resolution last, since order in caps matters for things like fixation. */
2702 results = g_list_sort (results, (GCompareFunc) sort_by_frame_size);
2703 while (results != NULL) {
2704 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret,
2706 results = g_list_delete_link (results, results);
2709 if (gst_caps_is_empty (ret))
2710 goto enum_framesizes_no_results;
2715 enum_framesizes_failed:
2717 /* I don't see how this is actually an error */
2718 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2719 "Failed to enumerate frame sizes for pixelformat %" GST_FOURCC_FORMAT
2720 " (%s)", GST_FOURCC_ARGS (pixelformat), g_strerror (errno));
2721 goto default_frame_sizes;
2723 enum_framesizes_no_results:
2725 /* it's possible that VIDIOC_ENUM_FRAMESIZES is defined but the driver in
2726 * question doesn't actually support it yet */
2727 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
2728 "No results for pixelformat %" GST_FOURCC_FORMAT
2729 " enumerating frame sizes, trying fallback",
2730 GST_FOURCC_ARGS (pixelformat));
2731 goto default_frame_sizes;
2735 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2736 "Unknown frame sizeenum type for pixelformat %" GST_FOURCC_FORMAT
2737 ": %u", GST_FOURCC_ARGS (pixelformat), size.type);
2738 goto default_frame_sizes;
2741 default_frame_sizes:
2743 gint min_w, max_w, min_h, max_h, fix_num = 0, fix_denom = 0;
2745 /* This code is for Linux < 2.6.19 */
2747 max_w = max_h = GST_V4L2_MAX_SIZE;
2748 if (!gst_v4l2_object_get_nearest_size (v4l2object, pixelformat, &min_w,
2750 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2751 "Could not probe minimum capture size for pixelformat %"
2752 GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
2754 if (!gst_v4l2_object_get_nearest_size (v4l2object, pixelformat, &max_w,
2756 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2757 "Could not probe maximum capture size for pixelformat %"
2758 GST_FOURCC_FORMAT, GST_FOURCC_ARGS (pixelformat));
2761 /* Since we can't get framerate directly, try to use the current norm */
2762 if (v4l2object->tv_norm && v4l2object->norms) {
2764 GstTunerNorm *norm = NULL;
2765 GstTunerNorm *current =
2766 gst_v4l2_tuner_get_norm_by_std_id (v4l2object, v4l2object->tv_norm);
2768 for (norms = v4l2object->norms; norms != NULL; norms = norms->next) {
2769 norm = (GstTunerNorm *) norms->data;
2770 if (!strcmp (norm->label, current->label))
2773 /* If it's possible, set framerate to that (discrete) value */
2775 fix_num = gst_value_get_fraction_numerator (&norm->framerate);
2776 fix_denom = gst_value_get_fraction_denominator (&norm->framerate);
2780 tmp = gst_structure_copy (template);
2782 gst_structure_set (tmp, "framerate", GST_TYPE_FRACTION, fix_num,
2784 } else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2785 v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
2786 /* if norm can't be used, copy the template framerate */
2787 gst_structure_set (tmp, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
2792 gst_structure_set (tmp, "width", G_TYPE_INT, max_w, NULL);
2794 gst_structure_set (tmp, "width", GST_TYPE_INT_RANGE, min_w, max_w, NULL);
2797 gst_structure_set (tmp, "height", G_TYPE_INT, max_h, NULL);
2799 gst_structure_set (tmp, "height", GST_TYPE_INT_RANGE, min_h, max_h, NULL);
2801 gst_v4l2_object_add_aspect_ratio (v4l2object, tmp);
2803 if (!v4l2object->skip_try_fmt_probes) {
2804 /* We could consider setting interlace mode from min and max. */
2805 gst_v4l2_object_add_interlace_mode (v4l2object, tmp, max_w, max_h,
2807 /* We could consider to check colorspace for min too, in case it depends on
2808 * the size. But in this case, min and max could not be enough */
2809 gst_v4l2_object_add_colorspace (v4l2object, tmp, max_w, max_h,
2813 gst_v4l2_object_update_and_append (v4l2object, pixelformat, ret, tmp);
2819 gst_v4l2_object_get_nearest_size (GstV4l2Object * v4l2object,
2820 guint32 pixelformat, gint * width, gint * height)
2822 struct v4l2_format fmt;
2823 gboolean ret = FALSE;
2824 GstVideoInterlaceMode interlace_mode;
2826 g_return_val_if_fail (width != NULL, FALSE);
2827 g_return_val_if_fail (height != NULL, FALSE);
2829 GST_LOG_OBJECT (v4l2object->dbg_obj,
2830 "getting nearest size to %dx%d with format %" GST_FOURCC_FORMAT,
2831 *width, *height, GST_FOURCC_ARGS (pixelformat));
2833 memset (&fmt, 0, sizeof (struct v4l2_format));
2835 /* get size delimiters */
2836 memset (&fmt, 0, sizeof (fmt));
2837 fmt.type = v4l2object->type;
2838 fmt.fmt.pix.width = *width;
2839 fmt.fmt.pix.height = *height;
2840 fmt.fmt.pix.pixelformat = pixelformat;
2841 fmt.fmt.pix.field = V4L2_FIELD_ANY;
2843 if (gst_v4l2_object_try_fmt (v4l2object, &fmt) < 0)
2846 GST_LOG_OBJECT (v4l2object->dbg_obj,
2847 "got nearest size %dx%d", fmt.fmt.pix.width, fmt.fmt.pix.height);
2849 *width = fmt.fmt.pix.width;
2850 *height = fmt.fmt.pix.height;
2852 if (!gst_v4l2_object_get_interlace_mode (fmt.fmt.pix.field, &interlace_mode)) {
2853 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2854 "Unsupported field type for %" GST_FOURCC_FORMAT "@%ux%u: %u",
2855 GST_FOURCC_ARGS (pixelformat), *width, *height, fmt.fmt.pix.field);
2863 GST_WARNING_OBJECT (v4l2object->dbg_obj,
2864 "Unable to try format: %s", g_strerror (errno));
2871 gst_v4l2_object_is_dmabuf_supported (GstV4l2Object * v4l2object)
2873 gboolean ret = TRUE;
2874 struct v4l2_exportbuffer expbuf = {
2875 .type = v4l2object->type,
2878 .flags = O_CLOEXEC | O_RDWR,
2881 /* Expected to fail, but ENOTTY tells us that it is not implemented. */
2882 v4l2object->ioctl (v4l2object->video_fd, VIDIOC_EXPBUF, &expbuf);
2883 if (errno == ENOTTY)
2890 gst_v4l2_object_setup_pool (GstV4l2Object * v4l2object, GstCaps * caps)
2894 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "initializing the %s system",
2895 V4L2_TYPE_IS_OUTPUT (v4l2object->type) ? "output" : "capture");
2897 GST_V4L2_CHECK_OPEN (v4l2object);
2898 GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
2900 /* find transport */
2901 mode = v4l2object->req_mode;
2903 if (v4l2object->device_caps & V4L2_CAP_READWRITE) {
2904 if (v4l2object->req_mode == GST_V4L2_IO_AUTO)
2905 mode = GST_V4L2_IO_RW;
2906 } else if (v4l2object->req_mode == GST_V4L2_IO_RW)
2907 goto method_not_supported;
2909 if (v4l2object->device_caps & V4L2_CAP_STREAMING) {
2910 if (v4l2object->req_mode == GST_V4L2_IO_AUTO) {
2911 if (!V4L2_TYPE_IS_OUTPUT (v4l2object->type) &&
2912 gst_v4l2_object_is_dmabuf_supported (v4l2object)) {
2913 mode = GST_V4L2_IO_DMABUF;
2915 mode = GST_V4L2_IO_MMAP;
2918 } else if (v4l2object->req_mode == GST_V4L2_IO_MMAP)
2919 goto method_not_supported;
2921 /* if still no transport selected, error out */
2922 if (mode == GST_V4L2_IO_AUTO)
2923 goto no_supported_capture_method;
2925 GST_INFO_OBJECT (v4l2object->dbg_obj, "accessing buffers via mode %d", mode);
2926 v4l2object->mode = mode;
2928 /* If min_buffers is not set, the driver either does not support the control or
2929 it has not been asked yet via propose_allocation/decide_allocation. */
2930 if (!v4l2object->min_buffers)
2931 gst_v4l2_get_driver_min_buffers (v4l2object);
2933 /* Map the buffers */
2934 GST_LOG_OBJECT (v4l2object->dbg_obj, "initiating buffer pool");
2936 if (!(v4l2object->pool = gst_v4l2_buffer_pool_new (v4l2object, caps)))
2937 goto buffer_pool_new_failed;
2939 GST_V4L2_SET_ACTIVE (v4l2object);
2944 buffer_pool_new_failed:
2946 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
2947 (_("Could not map buffers from device '%s'"),
2948 v4l2object->videodev),
2949 ("Failed to create buffer pool: %s", g_strerror (errno)));
2952 method_not_supported:
2954 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
2955 (_("The driver of device '%s' does not support the IO method %d"),
2956 v4l2object->videodev, mode), (NULL));
2959 no_supported_capture_method:
2961 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, READ,
2962 (_("The driver of device '%s' does not support any known IO "
2963 "method."), v4l2object->videodev), (NULL));
2969 gst_v4l2_object_set_stride (GstVideoInfo * info, GstVideoAlignment * align,
2970 gint plane, gint stride)
2972 const GstVideoFormatInfo *finfo = info->finfo;
2974 if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
2975 gint x_tiles, y_tiles, ws, hs, tile_height, padded_height;
2978 ws = GST_VIDEO_FORMAT_INFO_TILE_WS (finfo);
2979 hs = GST_VIDEO_FORMAT_INFO_TILE_HS (finfo);
2980 tile_height = 1 << hs;
2982 padded_height = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, plane,
2983 info->height + align->padding_top + align->padding_bottom);
2984 padded_height = GST_ROUND_UP_N (padded_height, tile_height);
2986 x_tiles = stride >> ws;
2987 y_tiles = padded_height >> hs;
2988 info->stride[plane] = GST_VIDEO_TILE_MAKE_STRIDE (x_tiles, y_tiles);
2990 info->stride[plane] = stride;
2995 gst_v4l2_object_extrapolate_info (GstV4l2Object * v4l2object,
2996 GstVideoInfo * info, GstVideoAlignment * align, gint stride)
2998 const GstVideoFormatInfo *finfo = info->finfo;
2999 gint i, estride, padded_height;
3002 g_return_if_fail (v4l2object->n_v4l2_planes == 1);
3004 padded_height = info->height + align->padding_top + align->padding_bottom;
3006 for (i = 0; i < finfo->n_planes; i++) {
3007 estride = gst_v4l2_object_extrapolate_stride (finfo, i, stride);
3009 gst_v4l2_object_set_stride (info, align, i, estride);
3011 info->offset[i] = offs;
3013 GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, i, padded_height);
3015 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
3016 "Extrapolated for plane %d with base stride %d: "
3017 "stride %d, offset %" G_GSIZE_FORMAT, i, stride, info->stride[i],
3021 /* Update the image size according the amount of data we are going to
3022 * read/write. This workaround bugs in driver where the sizeimage provided
3023 * by TRY/S_FMT represent the buffer length (maximum size) rather then the expected
3024 * bytesused (buffer size). */
3025 if (offs < info->size)
3030 gst_v4l2_object_save_format (GstV4l2Object * v4l2object,
3031 struct v4l2_fmtdesc *fmtdesc, struct v4l2_format *format,
3032 GstVideoInfo * info, GstVideoAlignment * align)
3034 const GstVideoFormatInfo *finfo = info->finfo;
3035 gboolean standard_stride = TRUE;
3036 gint stride, pstride, padded_width, padded_height, i;
3038 if (GST_VIDEO_INFO_FORMAT (info) == GST_VIDEO_FORMAT_ENCODED) {
3039 v4l2object->n_v4l2_planes = 1;
3040 info->size = format->fmt.pix.sizeimage;
3044 /* adjust right padding */
3045 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type))
3046 stride = format->fmt.pix_mp.plane_fmt[0].bytesperline;
3048 stride = format->fmt.pix.bytesperline;
3050 pstride = GST_VIDEO_FORMAT_INFO_PSTRIDE (finfo, 0);
3052 padded_width = stride / pstride;
3054 /* pstride can be 0 for complex formats */
3055 GST_WARNING_OBJECT (v4l2object->element,
3056 "format %s has a pstride of 0, cannot compute padded with",
3057 gst_video_format_to_string (GST_VIDEO_INFO_FORMAT (info)));
3058 padded_width = stride;
3061 if (padded_width < format->fmt.pix.width)
3062 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3063 "Driver bug detected, stride (%d) is too small for the width (%d)",
3064 padded_width, format->fmt.pix.width);
3066 align->padding_right = padded_width - info->width - align->padding_left;
3068 /* adjust bottom padding */
3069 padded_height = format->fmt.pix.height;
3071 if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
3072 guint hs, tile_height;
3074 hs = GST_VIDEO_FORMAT_INFO_TILE_HS (finfo);
3075 tile_height = 1 << hs;
3077 padded_height = GST_ROUND_UP_N (padded_height, tile_height);
3080 align->padding_bottom = padded_height - info->height - align->padding_top;
3082 /* setup the strides and offset */
3083 if (V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type)) {
3084 struct v4l2_pix_format_mplane *pix_mp = &format->fmt.pix_mp;
3086 /* figure out the frame layout */
3087 v4l2object->n_v4l2_planes = MAX (1, pix_mp->num_planes);
3089 for (i = 0; i < v4l2object->n_v4l2_planes; i++) {
3090 stride = pix_mp->plane_fmt[i].bytesperline;
3092 if (info->stride[i] != stride)
3093 standard_stride = FALSE;
3095 gst_v4l2_object_set_stride (info, align, i, stride);
3096 info->offset[i] = info->size;
3097 info->size += pix_mp->plane_fmt[i].sizeimage;
3100 /* Extrapolate stride if planar format are being set in 1 v4l2 plane */
3101 if (v4l2object->n_v4l2_planes < finfo->n_planes) {
3102 stride = format->fmt.pix_mp.plane_fmt[0].bytesperline;
3103 gst_v4l2_object_extrapolate_info (v4l2object, info, align, stride);
3106 /* only one plane in non-MPLANE mode */
3107 v4l2object->n_v4l2_planes = 1;
3108 info->size = format->fmt.pix.sizeimage;
3109 stride = format->fmt.pix.bytesperline;
3111 if (info->stride[0] != stride)
3112 standard_stride = FALSE;
3114 gst_v4l2_object_extrapolate_info (v4l2object, info, align, stride);
3117 /* adjust the offset to take into account left and top */
3118 if (GST_VIDEO_FORMAT_INFO_IS_TILED (finfo)) {
3119 if ((align->padding_left + align->padding_top) > 0)
3120 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3121 "Left and top padding is not permitted for tiled formats");
3123 for (i = 0; i < finfo->n_planes; i++) {
3126 /* FIXME we assume plane as component as this is true for all supported
3127 * format we support. */
3129 hedge = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, i, align->padding_left);
3130 vedge = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (finfo, i, align->padding_top);
3132 info->offset[i] += (vedge * info->stride[i]) +
3133 (hedge * GST_VIDEO_INFO_COMP_PSTRIDE (info, i));
3138 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got sizeimage %" G_GSIZE_FORMAT,
3141 /* to avoid copies we need video meta if there is padding */
3142 v4l2object->need_video_meta =
3143 ((align->padding_top + align->padding_left + align->padding_right +
3144 align->padding_bottom) != 0);
3146 /* ... or if stride is non "standard" */
3147 if (!standard_stride)
3148 v4l2object->need_video_meta = TRUE;
3150 /* ... or also video meta if we use multiple, non-contiguous, planes */
3151 if (v4l2object->n_v4l2_planes > 1)
3152 v4l2object->need_video_meta = TRUE;
3154 v4l2object->info = *info;
3155 v4l2object->align = *align;
3156 v4l2object->format = *format;
3157 v4l2object->fmtdesc = fmtdesc;
3159 /* if we have a framerate pre-calculate duration */
3160 if (info->fps_n > 0 && info->fps_d > 0) {
3161 v4l2object->duration = gst_util_uint64_scale_int (GST_SECOND, info->fps_d,
3164 v4l2object->duration = GST_CLOCK_TIME_NONE;
3169 gst_v4l2_object_extrapolate_stride (const GstVideoFormatInfo * finfo,
3170 gint plane, gint stride)
3174 switch (finfo->format) {
3175 case GST_VIDEO_FORMAT_NV12:
3176 case GST_VIDEO_FORMAT_NV12_64Z32:
3177 case GST_VIDEO_FORMAT_NV21:
3178 case GST_VIDEO_FORMAT_NV16:
3179 case GST_VIDEO_FORMAT_NV61:
3180 case GST_VIDEO_FORMAT_NV24:
3181 estride = (plane == 0 ? 1 : 2) *
3182 GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, plane, stride);
3185 estride = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (finfo, plane, stride);
3193 gst_v4l2_object_set_format_full (GstV4l2Object * v4l2object, GstCaps * caps,
3194 gboolean try_only, GstV4l2Error * error)
3196 gint fd = v4l2object->video_fd;
3197 struct v4l2_format format;
3198 struct v4l2_streamparm streamparm;
3199 enum v4l2_field field;
3200 guint32 pixelformat;
3201 struct v4l2_fmtdesc *fmtdesc;
3203 GstVideoAlignment align;
3204 gint width, height, fps_n, fps_d;
3208 enum v4l2_colorspace colorspace = 0;
3209 enum v4l2_quantization range = 0;
3210 enum v4l2_ycbcr_encoding matrix = 0;
3211 enum v4l2_xfer_func transfer = 0;
3214 g_return_val_if_fail (!v4l2object->skip_try_fmt_probes ||
3215 gst_caps_is_writable (caps), FALSE);
3217 GST_V4L2_CHECK_OPEN (v4l2object);
3219 GST_V4L2_CHECK_NOT_ACTIVE (v4l2object);
3221 is_mplane = V4L2_TYPE_IS_MULTIPLANAR (v4l2object->type);
3223 gst_video_info_init (&info);
3224 gst_video_alignment_reset (&align);
3226 if (!gst_v4l2_object_get_caps_info (v4l2object, caps, &fmtdesc, &info))
3229 pixelformat = fmtdesc->pixelformat;
3230 width = GST_VIDEO_INFO_WIDTH (&info);
3231 height = GST_VIDEO_INFO_HEIGHT (&info);
3232 fps_n = GST_VIDEO_INFO_FPS_N (&info);
3233 fps_d = GST_VIDEO_INFO_FPS_D (&info);
3235 /* if encoded format (GST_VIDEO_INFO_N_PLANES return 0)
3236 * or if contiguous is prefered */
3237 n_v4l_planes = GST_VIDEO_INFO_N_PLANES (&info);
3238 if (!n_v4l_planes || !v4l2object->prefered_non_contiguous)
3241 if (GST_VIDEO_INFO_IS_INTERLACED (&info)) {
3242 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "interlaced video");
3243 /* ideally we would differentiate between types of interlaced video
3244 * but there is not sufficient information in the caps..
3246 field = V4L2_FIELD_INTERLACED;
3248 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "progressive video");
3249 field = V4L2_FIELD_NONE;
3252 /* We first pick th main colorspace from the primaries */
3253 switch (info.colorimetry.primaries) {
3254 case GST_VIDEO_COLOR_PRIMARIES_BT709:
3255 /* There is two colorspaces using these primaries, use the range to
3257 if (info.colorimetry.range == GST_VIDEO_COLOR_RANGE_16_235)
3258 colorspace = V4L2_COLORSPACE_REC709;
3260 colorspace = V4L2_COLORSPACE_SRGB;
3262 case GST_VIDEO_COLOR_PRIMARIES_BT2020:
3263 colorspace = V4L2_COLORSPACE_BT2020;
3265 case GST_VIDEO_COLOR_PRIMARIES_BT470M:
3266 colorspace = V4L2_COLORSPACE_470_SYSTEM_M;
3268 case GST_VIDEO_COLOR_PRIMARIES_BT470BG:
3269 colorspace = V4L2_COLORSPACE_470_SYSTEM_BG;
3271 case GST_VIDEO_COLOR_PRIMARIES_SMPTE170M:
3272 colorspace = V4L2_COLORSPACE_SMPTE170M;
3274 case GST_VIDEO_COLOR_PRIMARIES_SMPTE240M:
3275 colorspace = V4L2_COLORSPACE_SMPTE240M;
3278 case GST_VIDEO_COLOR_PRIMARIES_FILM:
3279 case GST_VIDEO_COLOR_PRIMARIES_UNKNOWN:
3280 /* We don't know, we will guess */
3284 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3285 "Unknown colorimetry primaries %d", info.colorimetry.primaries);
3289 switch (info.colorimetry.range) {
3290 case GST_VIDEO_COLOR_RANGE_0_255:
3291 range = V4L2_QUANTIZATION_FULL_RANGE;
3293 case GST_VIDEO_COLOR_RANGE_16_235:
3294 range = V4L2_QUANTIZATION_LIM_RANGE;
3296 case GST_VIDEO_COLOR_RANGE_UNKNOWN:
3297 /* We let the driver pick a default one */
3300 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3301 "Unknown colorimetry range %d", info.colorimetry.range);
3305 switch (info.colorimetry.matrix) {
3306 case GST_VIDEO_COLOR_MATRIX_RGB:
3307 /* Unspecified, leave to default */
3309 /* FCC is about the same as BT601 with less digit */
3310 case GST_VIDEO_COLOR_MATRIX_FCC:
3311 case GST_VIDEO_COLOR_MATRIX_BT601:
3312 matrix = V4L2_YCBCR_ENC_601;
3314 case GST_VIDEO_COLOR_MATRIX_BT709:
3315 matrix = V4L2_YCBCR_ENC_709;
3317 case GST_VIDEO_COLOR_MATRIX_SMPTE240M:
3318 matrix = V4L2_YCBCR_ENC_SMPTE240M;
3320 case GST_VIDEO_COLOR_MATRIX_BT2020:
3321 matrix = V4L2_YCBCR_ENC_BT2020;
3323 case GST_VIDEO_COLOR_MATRIX_UNKNOWN:
3324 /* We let the driver pick a default one */
3327 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3328 "Unknown colorimetry matrix %d", info.colorimetry.matrix);
3332 switch (info.colorimetry.transfer) {
3333 case GST_VIDEO_TRANSFER_GAMMA18:
3334 case GST_VIDEO_TRANSFER_GAMMA20:
3335 case GST_VIDEO_TRANSFER_GAMMA22:
3336 case GST_VIDEO_TRANSFER_GAMMA28:
3337 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3338 "GAMMA 18, 20, 22, 28 transfer functions not supported");
3340 case GST_VIDEO_TRANSFER_GAMMA10:
3341 transfer = V4L2_XFER_FUNC_NONE;
3343 case GST_VIDEO_TRANSFER_BT2020_12:
3344 case GST_VIDEO_TRANSFER_BT709:
3345 transfer = V4L2_XFER_FUNC_709;
3347 case GST_VIDEO_TRANSFER_SMPTE240M:
3348 transfer = V4L2_XFER_FUNC_SMPTE240M;
3350 case GST_VIDEO_TRANSFER_SRGB:
3351 transfer = V4L2_XFER_FUNC_SRGB;
3353 case GST_VIDEO_TRANSFER_LOG100:
3354 case GST_VIDEO_TRANSFER_LOG316:
3355 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3356 "LOG 100, 316 transfer functions not supported");
3357 /* FIXME No known sensible default, maybe AdobeRGB ? */
3359 case GST_VIDEO_TRANSFER_UNKNOWN:
3360 /* We let the driver pick a default one */
3363 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3364 "Unknown colorimetry tranfer %d", info.colorimetry.transfer);
3368 if (colorspace == 0) {
3369 /* Try to guess colorspace according to pixelformat and size */
3370 if (GST_VIDEO_INFO_IS_YUV (&info)) {
3371 /* SD streams likely use SMPTE170M and HD streams REC709 */
3372 if (width <= 720 && height <= 576)
3373 colorspace = V4L2_COLORSPACE_SMPTE170M;
3375 colorspace = V4L2_COLORSPACE_REC709;
3376 } else if (GST_VIDEO_INFO_IS_RGB (&info)) {
3377 colorspace = V4L2_COLORSPACE_SRGB;
3378 transfer = V4L2_XFER_FUNC_NONE;
3382 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired format %dx%d, format "
3383 "%" GST_FOURCC_FORMAT " stride: %d", width, height,
3384 GST_FOURCC_ARGS (pixelformat), GST_VIDEO_INFO_PLANE_STRIDE (&info, 0));
3386 memset (&format, 0x00, sizeof (struct v4l2_format));
3387 format.type = v4l2object->type;
3390 format.type = v4l2object->type;
3391 format.fmt.pix_mp.pixelformat = pixelformat;
3392 format.fmt.pix_mp.width = width;
3393 format.fmt.pix_mp.height = height;
3394 format.fmt.pix_mp.field = field;
3395 format.fmt.pix_mp.num_planes = n_v4l_planes;
3397 /* try to ask our prefered stride but it's not a failure if not
3399 for (i = 0; i < n_v4l_planes; i++) {
3400 gint stride = GST_VIDEO_INFO_PLANE_STRIDE (&info, i);
3402 if (GST_VIDEO_FORMAT_INFO_IS_TILED (info.finfo))
3403 stride = GST_VIDEO_TILE_X_TILES (stride) <<
3404 GST_VIDEO_FORMAT_INFO_TILE_WS (info.finfo);
3406 format.fmt.pix_mp.plane_fmt[i].bytesperline = stride;
3409 if (GST_VIDEO_INFO_FORMAT (&info) == GST_VIDEO_FORMAT_ENCODED)
3410 format.fmt.pix_mp.plane_fmt[0].sizeimage = ENCODED_BUFFER_SIZE;
3412 gint stride = GST_VIDEO_INFO_PLANE_STRIDE (&info, 0);
3414 format.type = v4l2object->type;
3416 format.fmt.pix.width = width;
3417 format.fmt.pix.height = height;
3418 format.fmt.pix.pixelformat = pixelformat;
3419 format.fmt.pix.field = field;
3421 if (GST_VIDEO_FORMAT_INFO_IS_TILED (info.finfo))
3422 stride = GST_VIDEO_TILE_X_TILES (stride) <<
3423 GST_VIDEO_FORMAT_INFO_TILE_WS (info.finfo);
3425 /* try to ask our prefered stride */
3426 format.fmt.pix.bytesperline = stride;
3428 if (GST_VIDEO_INFO_FORMAT (&info) == GST_VIDEO_FORMAT_ENCODED)
3429 format.fmt.pix.sizeimage = ENCODED_BUFFER_SIZE;
3432 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired format is %dx%d, format "
3433 "%" GST_FOURCC_FORMAT ", nb planes %d", format.fmt.pix.width,
3434 format.fmt.pix_mp.height,
3435 GST_FOURCC_ARGS (format.fmt.pix.pixelformat),
3436 is_mplane ? format.fmt.pix_mp.num_planes : 1);
3438 #ifndef GST_DISABLE_GST_DEBUG
3440 for (i = 0; i < format.fmt.pix_mp.num_planes; i++)
3441 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d",
3442 format.fmt.pix_mp.plane_fmt[i].bytesperline);
3444 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d",
3445 format.fmt.pix.bytesperline);
3449 if (V4L2_TYPE_IS_OUTPUT (v4l2object->type)) {
3451 format.fmt.pix_mp.colorspace = colorspace;
3452 format.fmt.pix_mp.quantization = range;
3453 format.fmt.pix_mp.ycbcr_enc = matrix;
3454 format.fmt.pix_mp.xfer_func = transfer;
3456 format.fmt.pix.colorspace = colorspace;
3457 format.fmt.pix.quantization = range;
3458 format.fmt.pix.ycbcr_enc = matrix;
3459 format.fmt.pix.xfer_func = transfer;
3462 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired colorspace is %d:%d:%d:%d",
3463 colorspace, range, matrix, transfer);
3467 if (v4l2object->ioctl (fd, VIDIOC_TRY_FMT, &format) < 0)
3468 goto try_fmt_failed;
3470 if (v4l2object->ioctl (fd, VIDIOC_S_FMT, &format) < 0)
3471 goto set_fmt_failed;
3474 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got format of %dx%d, format "
3475 "%" GST_FOURCC_FORMAT ", nb planes %d, colorspace %d",
3476 format.fmt.pix.width, format.fmt.pix_mp.height,
3477 GST_FOURCC_ARGS (format.fmt.pix.pixelformat),
3478 is_mplane ? format.fmt.pix_mp.num_planes : 1,
3479 is_mplane ? format.fmt.pix_mp.colorspace : format.fmt.pix.colorspace);
3481 #ifndef GST_DISABLE_GST_DEBUG
3483 for (i = 0; i < format.fmt.pix_mp.num_planes; i++)
3484 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d, sizeimage %d",
3485 format.fmt.pix_mp.plane_fmt[i].bytesperline,
3486 format.fmt.pix_mp.plane_fmt[i].sizeimage);
3488 GST_DEBUG_OBJECT (v4l2object->dbg_obj, " stride %d, sizeimage %d",
3489 format.fmt.pix.bytesperline, format.fmt.pix.sizeimage);
3493 if (format.fmt.pix.pixelformat != pixelformat)
3494 goto invalid_pixelformat;
3496 /* Only negotiate size with raw data.
3497 * For some codecs the dimensions are *not* in the bitstream, IIRC VC1
3498 * in ASF mode for example, there is also not reason for a driver to
3499 * change the size. */
3500 if (info.finfo->format != GST_VIDEO_FORMAT_ENCODED) {
3501 /* We can crop larger images */
3502 if (format.fmt.pix.width < width || format.fmt.pix.height < height)
3503 goto invalid_dimensions;
3505 /* Note, this will be adjusted if upstream has non-centered cropping. */
3506 align.padding_top = 0;
3507 align.padding_bottom = format.fmt.pix.height - height;
3508 align.padding_left = 0;
3509 align.padding_right = format.fmt.pix.width - width;
3512 if (is_mplane && format.fmt.pix_mp.num_planes != n_v4l_planes)
3513 goto invalid_planes;
3515 if ((is_mplane && format.fmt.pix_mp.field != field)
3516 || format.fmt.pix.field != field)
3519 gst_v4l2_object_get_colorspace (&format, &info.colorimetry);
3521 s = gst_caps_get_structure (caps, 0);
3522 if (gst_structure_has_field (s, "colorimetry")) {
3523 GstVideoColorimetry ci;
3524 if (!gst_video_colorimetry_from_string (&ci,
3525 gst_structure_get_string (s, "colorimetry"))
3526 || !gst_video_colorimetry_is_equal (&ci, &info.colorimetry))
3527 goto invalid_colorimetry;
3530 /* In case we have skipped the try_fmt probes, we'll need to set the
3531 * colorimetry and interlace-mode back into the caps. */
3532 if (v4l2object->skip_try_fmt_probes) {
3533 if (!gst_structure_has_field (s, "colorimetry")) {
3534 gchar *str = gst_video_colorimetry_to_string (&info.colorimetry);
3535 gst_structure_set (s, "colorimetry", G_TYPE_STRING, str, NULL);
3539 if (!gst_structure_has_field (s, "interlace-mode"))
3540 gst_structure_set (s, "interlace-mode", G_TYPE_STRING,
3541 gst_video_interlace_mode_to_string (info.interlace_mode), NULL);
3544 if (try_only) /* good enough for trying only */
3547 if (GST_VIDEO_INFO_HAS_ALPHA (&info)) {
3548 struct v4l2_control ctl = { 0, };
3549 ctl.id = V4L2_CID_ALPHA_COMPONENT;
3552 if (v4l2object->ioctl (fd, VIDIOC_S_CTRL, &ctl) < 0)
3553 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3554 "Failed to set alpha component value");
3557 /* Is there a reason we require the caller to always specify a framerate? */
3558 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Desired framerate: %u/%u", fps_n,
3561 memset (&streamparm, 0x00, sizeof (struct v4l2_streamparm));
3562 streamparm.type = v4l2object->type;
3564 if (v4l2object->ioctl (fd, VIDIOC_G_PARM, &streamparm) < 0)
3565 goto get_parm_failed;
3567 if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE
3568 || v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
3569 GST_VIDEO_INFO_FPS_N (&info) =
3570 streamparm.parm.capture.timeperframe.denominator;
3571 GST_VIDEO_INFO_FPS_D (&info) =
3572 streamparm.parm.capture.timeperframe.numerator;
3574 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got capture framerate: %u/%u",
3575 streamparm.parm.capture.timeperframe.denominator,
3576 streamparm.parm.capture.timeperframe.numerator);
3578 /* We used to skip frame rate setup if the camera was already setup
3579 * with the requested frame rate. This breaks some cameras though,
3580 * causing them to not output data (several models of Thinkpad cameras
3581 * have this problem at least).
3582 * So, don't skip. */
3583 GST_LOG_OBJECT (v4l2object->dbg_obj, "Setting capture framerate to %u/%u",
3585 /* We want to change the frame rate, so check whether we can. Some cheap USB
3586 * cameras don't have the capability */
3587 if ((streamparm.parm.capture.capability & V4L2_CAP_TIMEPERFRAME) == 0) {
3588 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
3589 "Not setting capture framerate (not supported)");
3593 /* Note: V4L2 wants the frame interval, we have the frame rate */
3594 streamparm.parm.capture.timeperframe.numerator = fps_d;
3595 streamparm.parm.capture.timeperframe.denominator = fps_n;
3597 /* some cheap USB cam's won't accept any change */
3598 if (v4l2object->ioctl (fd, VIDIOC_S_PARM, &streamparm) < 0)
3599 goto set_parm_failed;
3601 if (streamparm.parm.capture.timeperframe.numerator > 0 &&
3602 streamparm.parm.capture.timeperframe.denominator > 0) {
3603 /* get new values */
3604 fps_d = streamparm.parm.capture.timeperframe.numerator;
3605 fps_n = streamparm.parm.capture.timeperframe.denominator;
3607 GST_INFO_OBJECT (v4l2object->dbg_obj, "Set capture framerate to %u/%u",
3610 /* fix v4l2 capture driver to provide framerate values */
3611 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3612 "Reuse caps framerate %u/%u - fix v4l2 capture driver", fps_n, fps_d);
3615 GST_VIDEO_INFO_FPS_N (&info) = fps_n;
3616 GST_VIDEO_INFO_FPS_D (&info) = fps_d;
3617 } else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT
3618 || v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
3619 GST_VIDEO_INFO_FPS_N (&info) =
3620 streamparm.parm.output.timeperframe.denominator;
3621 GST_VIDEO_INFO_FPS_D (&info) =
3622 streamparm.parm.output.timeperframe.numerator;
3624 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Got output framerate: %u/%u",
3625 streamparm.parm.output.timeperframe.denominator,
3626 streamparm.parm.output.timeperframe.numerator);
3628 GST_LOG_OBJECT (v4l2object->dbg_obj, "Setting output framerate to %u/%u",
3630 if ((streamparm.parm.output.capability & V4L2_CAP_TIMEPERFRAME) == 0) {
3631 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
3632 "Not setting output framerate (not supported)");
3636 /* Note: V4L2 wants the frame interval, we have the frame rate */
3637 streamparm.parm.output.timeperframe.numerator = fps_d;
3638 streamparm.parm.output.timeperframe.denominator = fps_n;
3640 if (v4l2object->ioctl (fd, VIDIOC_S_PARM, &streamparm) < 0)
3641 goto set_parm_failed;
3643 if (streamparm.parm.output.timeperframe.numerator > 0 &&
3644 streamparm.parm.output.timeperframe.denominator > 0) {
3645 /* get new values */
3646 fps_d = streamparm.parm.output.timeperframe.numerator;
3647 fps_n = streamparm.parm.output.timeperframe.denominator;
3649 GST_INFO_OBJECT (v4l2object->dbg_obj, "Set output framerate to %u/%u",
3652 /* fix v4l2 output driver to provide framerate values */
3653 GST_WARNING_OBJECT (v4l2object->dbg_obj,
3654 "Reuse caps framerate %u/%u - fix v4l2 output driver", fps_n, fps_d);
3657 GST_VIDEO_INFO_FPS_N (&info) = fps_n;
3658 GST_VIDEO_INFO_FPS_D (&info) = fps_d;
3662 /* add boolean return, so we can fail on drivers bugs */
3663 gst_v4l2_object_save_format (v4l2object, fmtdesc, &format, &info, &align);
3665 /* now configure the pool */
3666 if (!gst_v4l2_object_setup_pool (v4l2object, caps))
3674 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "can't parse caps %" GST_PTR_FORMAT,
3680 if (errno == EINVAL) {
3681 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3682 (_("Device '%s' has no supported format"), v4l2object->videodev),
3683 ("Call to TRY_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
3684 GST_FOURCC_ARGS (pixelformat), width, height,
3685 g_strerror (errno)));
3687 GST_V4L2_ERROR (error, RESOURCE, FAILED,
3688 (_("Device '%s' failed during initialization"),
3689 v4l2object->videodev),
3690 ("Call to TRY_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
3691 GST_FOURCC_ARGS (pixelformat), width, height,
3692 g_strerror (errno)));
3698 if (errno == EBUSY) {
3699 GST_V4L2_ERROR (error, RESOURCE, BUSY,
3700 (_("Device '%s' is busy"), v4l2object->videodev),
3701 ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
3702 GST_FOURCC_ARGS (pixelformat), width, height,
3703 g_strerror (errno)));
3704 } else if (errno == EINVAL) {
3705 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3706 (_("Device '%s' has no supported format"), v4l2object->videodev),
3707 ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
3708 GST_FOURCC_ARGS (pixelformat), width, height,
3709 g_strerror (errno)));
3711 GST_V4L2_ERROR (error, RESOURCE, FAILED,
3712 (_("Device '%s' failed during initialization"),
3713 v4l2object->videodev),
3714 ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
3715 GST_FOURCC_ARGS (pixelformat), width, height,
3716 g_strerror (errno)));
3722 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3723 (_("Device '%s' cannot capture at %dx%d"),
3724 v4l2object->videodev, width, height),
3725 ("Tried to capture at %dx%d, but device returned size %dx%d",
3726 width, height, format.fmt.pix.width, format.fmt.pix.height));
3729 invalid_pixelformat:
3731 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3732 (_("Device '%s' cannot capture in the specified format"),
3733 v4l2object->videodev),
3734 ("Tried to capture in %" GST_FOURCC_FORMAT
3735 ", but device returned format" " %" GST_FOURCC_FORMAT,
3736 GST_FOURCC_ARGS (pixelformat),
3737 GST_FOURCC_ARGS (format.fmt.pix.pixelformat)));
3742 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3743 (_("Device '%s' does support non-contiguous planes"),
3744 v4l2object->videodev),
3745 ("Device wants %d planes", format.fmt.pix_mp.num_planes));
3750 enum v4l2_field wanted_field;
3753 wanted_field = format.fmt.pix_mp.field;
3755 wanted_field = format.fmt.pix.field;
3757 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3758 (_("Device '%s' does not support %s interlacing"),
3759 v4l2object->videodev,
3760 field == V4L2_FIELD_NONE ? "progressive" : "interleaved"),
3761 ("Device wants %s interlacing",
3762 wanted_field == V4L2_FIELD_NONE ? "progressive" : "interleaved"));
3765 invalid_colorimetry:
3767 gchar *wanted_colorimetry;
3769 wanted_colorimetry = gst_video_colorimetry_to_string (&info.colorimetry);
3771 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3772 (_("Device '%s' does not support %s colorimetry"),
3773 v4l2object->videodev, gst_structure_get_string (s, "colorimetry")),
3774 ("Device wants %s colorimetry", wanted_colorimetry));
3776 g_free (wanted_colorimetry);
3781 /* it's possible that this call is not supported */
3782 if (errno != EINVAL && errno != ENOTTY) {
3783 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3784 (_("Could not get parameters on device '%s'"),
3785 v4l2object->videodev), GST_ERROR_SYSTEM);
3791 GST_V4L2_ERROR (error, RESOURCE, SETTINGS,
3792 (_("Video device did not accept new frame rate setting.")),
3798 /* setup_pool already send the error */
3804 gst_v4l2_object_set_format (GstV4l2Object * v4l2object, GstCaps * caps,
3805 GstV4l2Error * error)
3807 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Setting format to %" GST_PTR_FORMAT,
3809 return gst_v4l2_object_set_format_full (v4l2object, caps, FALSE, error);
3813 gst_v4l2_object_try_format (GstV4l2Object * v4l2object, GstCaps * caps,
3814 GstV4l2Error * error)
3816 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Trying format %" GST_PTR_FORMAT,
3818 return gst_v4l2_object_set_format_full (v4l2object, caps, TRUE, error);
3822 * gst_v4l2_object_acquire_format:
3823 * @v4l2object the object
3824 * @info a GstVideoInfo to be filled
3826 * Acquire the driver choosen format. This is useful in decoder or encoder elements where
3827 * the output format is choosen by the HW.
3829 * Returns: %TRUE on success, %FALSE on failure.
3832 gst_v4l2_object_acquire_format (GstV4l2Object * v4l2object, GstVideoInfo * info)
3834 struct v4l2_fmtdesc *fmtdesc;
3835 struct v4l2_format fmt;
3836 struct v4l2_crop crop;
3837 struct v4l2_selection sel;
3838 struct v4l2_rect *r = NULL;
3839 GstVideoFormat format;
3840 guint width, height;
3841 GstVideoAlignment align;
3843 gst_video_info_init (info);
3844 gst_video_alignment_reset (&align);
3846 memset (&fmt, 0x00, sizeof (struct v4l2_format));
3847 fmt.type = v4l2object->type;
3848 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_FMT, &fmt) < 0)
3849 goto get_fmt_failed;
3851 fmtdesc = gst_v4l2_object_get_format_from_fourcc (v4l2object,
3852 fmt.fmt.pix.pixelformat);
3853 if (fmtdesc == NULL)
3854 goto unsupported_format;
3856 /* No need to care about mplane, the four first params are the same */
3857 format = gst_v4l2_object_v4l2fourcc_to_video_format (fmt.fmt.pix.pixelformat);
3859 /* fails if we do no translate the fmt.pix.pixelformat to GstVideoFormat */
3860 if (format == GST_VIDEO_FORMAT_UNKNOWN)
3861 goto unsupported_format;
3863 if (fmt.fmt.pix.width == 0 || fmt.fmt.pix.height == 0)
3864 goto invalid_dimensions;
3866 width = fmt.fmt.pix.width;
3867 height = fmt.fmt.pix.height;
3869 /* Use the default compose rectangle */
3870 memset (&sel, 0, sizeof (struct v4l2_selection));
3871 sel.type = v4l2object->type;
3872 sel.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
3873 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_SELECTION, &sel) >= 0) {
3876 /* For ancient kernels, fall back to G_CROP */
3877 memset (&crop, 0, sizeof (struct v4l2_crop));
3878 crop.type = v4l2object->type;
3879 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_G_CROP, &crop) >= 0)
3883 align.padding_left = r->left;
3884 align.padding_top = r->top;
3885 align.padding_right = width - r->width - r->left;
3886 align.padding_bottom = height - r->height - r->top;
3891 gst_video_info_set_format (info, format, width, height);
3893 switch (fmt.fmt.pix.field) {
3894 case V4L2_FIELD_ANY:
3895 case V4L2_FIELD_NONE:
3896 info->interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
3898 case V4L2_FIELD_INTERLACED:
3899 case V4L2_FIELD_INTERLACED_TB:
3900 case V4L2_FIELD_INTERLACED_BT:
3901 info->interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
3904 goto unsupported_field;
3907 gst_v4l2_object_get_colorspace (&fmt, &info->colorimetry);
3909 gst_v4l2_object_save_format (v4l2object, fmtdesc, &fmt, info, &align);
3911 /* Shall we setup the pool ? */
3917 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
3918 (_("Video device did not provide output format.")), GST_ERROR_SYSTEM);
3923 GST_ELEMENT_WARNING (v4l2object->element, RESOURCE, SETTINGS,
3924 (_("Video device returned invalid dimensions.")),
3925 ("Expected non 0 dimensions, got %dx%d", fmt.fmt.pix.width,
3926 fmt.fmt.pix.height));
3931 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
3932 (_("Video device uses an unsupported interlacing method.")),
3933 ("V4L2 field type %d not supported", fmt.fmt.pix.field));
3938 GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS,
3939 (_("Video device uses an unsupported pixel format.")),
3940 ("V4L2 format %" GST_FOURCC_FORMAT " not supported",
3941 GST_FOURCC_ARGS (fmt.fmt.pix.pixelformat)));
3947 gst_v4l2_object_set_crop (GstV4l2Object * obj)
3949 struct v4l2_crop crop = { 0 };
3951 crop.type = obj->type;
3952 crop.c.left = obj->align.padding_left;
3953 crop.c.top = obj->align.padding_top;
3954 crop.c.width = obj->info.width;
3955 crop.c.height = obj->info.height;
3957 if (obj->align.padding_left + obj->align.padding_top +
3958 obj->align.padding_right + obj->align.padding_bottom == 0) {
3959 GST_DEBUG_OBJECT (obj->dbg_obj, "no cropping needed");
3963 GST_DEBUG_OBJECT (obj->dbg_obj,
3964 "Desired cropping left %u, top %u, size %ux%u", crop.c.left, crop.c.top,
3965 crop.c.width, crop.c.height);
3967 if (obj->ioctl (obj->video_fd, VIDIOC_S_CROP, &crop) < 0) {
3968 GST_WARNING_OBJECT (obj->dbg_obj, "VIDIOC_S_CROP failed");
3972 if (obj->ioctl (obj->video_fd, VIDIOC_G_CROP, &crop) < 0) {
3973 GST_WARNING_OBJECT (obj->dbg_obj, "VIDIOC_G_CROP failed");
3977 GST_DEBUG_OBJECT (obj->dbg_obj,
3978 "Got cropping left %u, top %u, size %ux%u", crop.c.left, crop.c.top,
3979 crop.c.width, crop.c.height);
3985 gst_v4l2_object_caps_equal (GstV4l2Object * v4l2object, GstCaps * caps)
3987 GstStructure *config;
3991 if (!v4l2object->pool)
3994 config = gst_buffer_pool_get_config (v4l2object->pool);
3995 gst_buffer_pool_config_get_params (config, &oldcaps, NULL, NULL, NULL);
3997 ret = oldcaps && gst_caps_is_equal (caps, oldcaps);
3999 gst_structure_free (config);
4005 gst_v4l2_object_unlock (GstV4l2Object * v4l2object)
4007 gboolean ret = TRUE;
4009 GST_LOG_OBJECT (v4l2object->dbg_obj, "start flushing");
4011 if (v4l2object->pool && gst_buffer_pool_is_active (v4l2object->pool))
4012 gst_buffer_pool_set_flushing (v4l2object->pool, TRUE);
4018 gst_v4l2_object_unlock_stop (GstV4l2Object * v4l2object)
4020 gboolean ret = TRUE;
4022 GST_LOG_OBJECT (v4l2object->dbg_obj, "stop flushing");
4024 if (v4l2object->pool && gst_buffer_pool_is_active (v4l2object->pool))
4025 gst_buffer_pool_set_flushing (v4l2object->pool, FALSE);
4031 gst_v4l2_object_stop (GstV4l2Object * v4l2object)
4033 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "stopping");
4035 if (!GST_V4L2_IS_OPEN (v4l2object))
4037 if (!GST_V4L2_IS_ACTIVE (v4l2object))
4040 if (v4l2object->pool) {
4041 GST_DEBUG_OBJECT (v4l2object->dbg_obj, "deactivating pool");
4042 gst_buffer_pool_set_active (v4l2object->pool, FALSE);
4043 gst_object_unref (v4l2object->pool);
4044 v4l2object->pool = NULL;
4047 GST_V4L2_SET_INACTIVE (v4l2object);
4054 gst_v4l2_object_probe_caps (GstV4l2Object * v4l2object, GstCaps * filter)
4060 formats = gst_v4l2_object_get_format_list (v4l2object);
4062 ret = gst_caps_new_empty ();
4064 if (v4l2object->keep_aspect && !v4l2object->par) {
4065 struct v4l2_cropcap cropcap;
4067 memset (&cropcap, 0, sizeof (cropcap));
4069 cropcap.type = v4l2object->type;
4070 if (v4l2object->ioctl (v4l2object->video_fd, VIDIOC_CROPCAP, &cropcap) < 0) {
4071 if (errno != ENOTTY)
4072 GST_WARNING_OBJECT (v4l2object->dbg_obj,
4073 "Failed to probe pixel aspect ratio with VIDIOC_CROPCAP: %s",
4074 g_strerror (errno));
4076 v4l2object->par = g_new0 (GValue, 1);
4077 g_value_init (v4l2object->par, GST_TYPE_FRACTION);
4078 gst_value_set_fraction (v4l2object->par, cropcap.pixelaspect.numerator,
4079 cropcap.pixelaspect.denominator);
4083 for (walk = formats; walk; walk = walk->next) {
4084 struct v4l2_fmtdesc *format;
4085 GstStructure *template;
4088 format = (struct v4l2_fmtdesc *) walk->data;
4090 template = gst_v4l2_object_v4l2fourcc_to_bare_struct (format->pixelformat);
4093 GST_DEBUG_OBJECT (v4l2object->dbg_obj,
4094 "unknown format %" GST_FOURCC_FORMAT,
4095 GST_FOURCC_ARGS (format->pixelformat));
4099 /* If we have a filter, check if we need to probe this format or not */
4101 GstCaps *format_caps = gst_caps_new_empty ();
4103 gst_caps_append_structure (format_caps, gst_structure_copy (template));
4105 if (!gst_caps_can_intersect (format_caps, filter)) {
4106 gst_caps_unref (format_caps);
4107 gst_structure_free (template);
4111 gst_caps_unref (format_caps);
4114 tmp = gst_v4l2_object_probe_caps_for_format (v4l2object,
4115 format->pixelformat, template);
4117 gst_caps_append (ret, tmp);
4119 gst_structure_free (template);
4126 ret = gst_caps_intersect_full (filter, ret, GST_CAPS_INTERSECT_FIRST);
4127 gst_caps_unref (tmp);
4130 GST_INFO_OBJECT (v4l2object->dbg_obj, "probed caps: %" GST_PTR_FORMAT, ret);
4136 gst_v4l2_object_get_caps (GstV4l2Object * v4l2object, GstCaps * filter)
4140 if (v4l2object->probed_caps == NULL)
4141 v4l2object->probed_caps = gst_v4l2_object_probe_caps (v4l2object, NULL);
4144 ret = gst_caps_intersect_full (filter, v4l2object->probed_caps,
4145 GST_CAPS_INTERSECT_FIRST);
4147 ret = gst_caps_ref (v4l2object->probed_caps);
4154 gst_v4l2_object_decide_allocation (GstV4l2Object * obj, GstQuery * query)
4157 GstBufferPool *pool = NULL, *other_pool = NULL;
4158 GstStructure *config;
4159 guint size, min, max, own_min = 0;
4161 gboolean has_video_meta;
4162 gboolean can_share_own_pool, pushing_from_our_pool = FALSE;
4163 GstAllocator *allocator = NULL;
4164 GstAllocationParams params = { 0 };
4166 GST_DEBUG_OBJECT (obj->dbg_obj, "decide allocation");
4168 g_return_val_if_fail (obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
4169 obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE, FALSE);
4171 gst_query_parse_allocation (query, &caps, NULL);
4173 if (obj->pool == NULL) {
4174 if (!gst_v4l2_object_setup_pool (obj, caps))
4178 if (gst_query_get_n_allocation_params (query) > 0)
4179 gst_query_parse_nth_allocation_param (query, 0, &allocator, ¶ms);
4181 if (gst_query_get_n_allocation_pools (query) > 0) {
4182 gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
4191 GST_DEBUG_OBJECT (obj->dbg_obj, "allocation: size:%u min:%u max:%u pool:%"
4192 GST_PTR_FORMAT, size, min, max, pool);
4195 gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
4197 can_share_own_pool = (has_video_meta || !obj->need_video_meta);
4199 gst_v4l2_get_driver_min_buffers (obj);
4200 /* We can't share our own pool, if it exceed V4L2 capacity */
4201 if (min + obj->min_buffers + 1 > VIDEO_MAX_FRAME)
4202 can_share_own_pool = FALSE;
4205 switch (obj->mode) {
4206 case GST_V4L2_IO_RW:
4208 /* in READ/WRITE mode, prefer a downstream pool because our own pool
4209 * doesn't help much, we have to write to it as well */
4210 GST_DEBUG_OBJECT (obj->dbg_obj,
4211 "read/write mode: using downstream pool");
4212 /* use the bigest size, when we use our own pool we can't really do any
4213 * other size than what the hardware gives us but for downstream pools
4215 size = MAX (size, obj->info.size);
4216 } else if (can_share_own_pool) {
4217 /* no downstream pool, use our own then */
4218 GST_DEBUG_OBJECT (obj->dbg_obj,
4219 "read/write mode: no downstream pool, using our own");
4220 pool = gst_object_ref (obj->pool);
4221 size = obj->info.size;
4222 pushing_from_our_pool = TRUE;
4226 case GST_V4L2_IO_USERPTR:
4227 case GST_V4L2_IO_DMABUF_IMPORT:
4228 /* in importing mode, prefer our own pool, and pass the other pool to
4229 * our own, so it can serve itself */
4231 goto no_downstream_pool;
4232 gst_v4l2_buffer_pool_set_other_pool (GST_V4L2_BUFFER_POOL (obj->pool),
4235 gst_object_unref (pool);
4236 pool = gst_object_ref (obj->pool);
4237 size = obj->info.size;
4240 case GST_V4L2_IO_MMAP:
4241 case GST_V4L2_IO_DMABUF:
4242 /* in streaming mode, prefer our own pool */
4243 /* Check if we can use it ... */
4244 if (can_share_own_pool) {
4246 gst_object_unref (pool);
4247 pool = gst_object_ref (obj->pool);
4248 size = obj->info.size;
4249 GST_DEBUG_OBJECT (obj->dbg_obj,
4250 "streaming mode: using our own pool %" GST_PTR_FORMAT, pool);
4251 pushing_from_our_pool = TRUE;
4253 GST_DEBUG_OBJECT (obj->dbg_obj,
4254 "streaming mode: copying to downstream pool %" GST_PTR_FORMAT,
4257 GST_DEBUG_OBJECT (obj->dbg_obj,
4258 "streaming mode: no usable pool, copying to generic pool");
4259 size = MAX (size, obj->info.size);
4262 case GST_V4L2_IO_AUTO:
4264 GST_WARNING_OBJECT (obj->dbg_obj, "unhandled mode");
4271 /* If pushing from our own pool, configure it with queried minimum,
4272 * otherwise use the minimum required */
4273 if (pushing_from_our_pool) {
4274 /* When pushing from our own pool, we need what downstream one, to be able
4275 * to fill the pipeline, the minimum required to decoder according to the
4276 * driver and 2 more, so we don't endup up with everything downstream or
4277 * held by the decoder. We account 2 buffers for v4l2 so when one is being
4278 * pushed downstream the other one can already be queued for the next
4280 own_min = min + obj->min_buffers + 2;
4282 /* If no allocation parameters where provided, allow for a little more
4283 * buffers and enable copy threshold */
4286 gst_v4l2_buffer_pool_copy_at_threshold (GST_V4L2_BUFFER_POOL (pool),
4289 gst_v4l2_buffer_pool_copy_at_threshold (GST_V4L2_BUFFER_POOL (pool),
4294 /* In this case we'll have to configure two buffer pool. For our buffer
4295 * pool, we'll need what the driver one, and one more, so we can dequeu */
4296 own_min = obj->min_buffers + 1;
4297 own_min = MAX (own_min, GST_V4L2_MIN_BUFFERS);
4299 /* for the downstream pool, we keep what downstream wants, though ensure
4300 * at least a minimum if downstream didn't suggest anything (we are
4301 * expecting the base class to create a default one for the context) */
4302 min = MAX (min, GST_V4L2_MIN_BUFFERS);
4304 /* To import we need the other pool to hold at least own_min */
4305 if (obj->pool == pool)
4309 /* Request a bigger max, if one was suggested but it's too small */
4311 max = MAX (min, max);
4313 /* First step, configure our own pool */
4314 config = gst_buffer_pool_get_config (obj->pool);
4316 if (obj->need_video_meta || has_video_meta) {
4317 GST_DEBUG_OBJECT (obj->dbg_obj, "activate Video Meta");
4318 gst_buffer_pool_config_add_option (config,
4319 GST_BUFFER_POOL_OPTION_VIDEO_META);
4322 gst_buffer_pool_config_set_allocator (config, allocator, ¶ms);
4323 gst_buffer_pool_config_set_params (config, caps, size, own_min, 0);
4325 GST_DEBUG_OBJECT (obj->dbg_obj, "setting own pool config to %"
4326 GST_PTR_FORMAT, config);
4328 /* Our pool often need to adjust the value */
4329 if (!gst_buffer_pool_set_config (obj->pool, config)) {
4330 config = gst_buffer_pool_get_config (obj->pool);
4332 GST_DEBUG_OBJECT (obj->dbg_obj, "own pool config changed to %"
4333 GST_PTR_FORMAT, config);
4335 /* our pool will adjust the maximum buffer, which we are fine with */
4336 if (!gst_buffer_pool_set_config (obj->pool, config))
4340 /* Now configure the other pool if different */
4341 if (obj->pool != pool)
4345 config = gst_buffer_pool_get_config (other_pool);
4346 gst_buffer_pool_config_set_allocator (config, allocator, ¶ms);
4347 gst_buffer_pool_config_set_params (config, caps, size, min, max);
4349 GST_DEBUG_OBJECT (obj->dbg_obj, "setting other pool config to %"
4350 GST_PTR_FORMAT, config);
4352 /* if downstream supports video metadata, add this to the pool config */
4353 if (has_video_meta) {
4354 GST_DEBUG_OBJECT (obj->dbg_obj, "activate Video Meta");
4355 gst_buffer_pool_config_add_option (config,
4356 GST_BUFFER_POOL_OPTION_VIDEO_META);
4359 if (!gst_buffer_pool_set_config (other_pool, config)) {
4360 config = gst_buffer_pool_get_config (other_pool);
4362 if (!gst_buffer_pool_config_validate_params (config, caps, size, min,
4364 gst_structure_free (config);
4368 if (!gst_buffer_pool_set_config (other_pool, config))
4374 /* For simplicity, simply read back the active configuration, so our base
4375 * class get the right information */
4376 config = gst_buffer_pool_get_config (pool);
4377 gst_buffer_pool_config_get_params (config, NULL, &size, &min, &max);
4378 gst_structure_free (config);
4382 gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
4384 gst_query_add_allocation_pool (query, pool, size, min, max);
4387 gst_object_unref (allocator);
4390 gst_object_unref (pool);
4396 /* setup_pool already send the error */
4401 GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
4402 (_("Failed to configure internal buffer pool.")), (NULL));
4407 GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
4408 (_("Video device did not suggest any buffer size.")), (NULL));
4414 gst_object_unref (allocator);
4417 gst_object_unref (pool);
4422 GST_ELEMENT_ERROR (obj->element, RESOURCE, SETTINGS,
4423 (_("No downstream pool to import from.")),
4424 ("When importing DMABUF or USERPTR, we need a pool to import from"));
4430 gst_v4l2_object_propose_allocation (GstV4l2Object * obj, GstQuery * query)
4432 GstBufferPool *pool;
4433 /* we need at least 2 buffers to operate */
4434 guint size, min, max;
4438 /* Set defaults allocation parameters */
4439 size = obj->info.size;
4440 min = GST_V4L2_MIN_BUFFERS;
4441 max = VIDEO_MAX_FRAME;
4443 gst_query_parse_allocation (query, &caps, &need_pool);
4448 if ((pool = obj->pool))
4449 gst_object_ref (pool);
4453 GstStructure *config;
4455 /* we had a pool, check caps */
4456 config = gst_buffer_pool_get_config (pool);
4457 gst_buffer_pool_config_get_params (config, &pcaps, NULL, NULL, NULL);
4459 GST_DEBUG_OBJECT (obj->dbg_obj,
4460 "we had a pool with caps %" GST_PTR_FORMAT, pcaps);
4461 if (!gst_caps_is_equal (caps, pcaps)) {
4462 gst_structure_free (config);
4463 gst_object_unref (pool);
4464 goto different_caps;
4466 gst_structure_free (config);
4468 gst_v4l2_get_driver_min_buffers (obj);
4470 min = MAX (obj->min_buffers, GST_V4L2_MIN_BUFFERS);
4472 gst_query_add_allocation_pool (query, pool, size, min, max);
4474 /* we also support various metadata */
4475 gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
4478 gst_object_unref (pool);
4485 GST_DEBUG_OBJECT (obj->dbg_obj, "no caps specified");
4490 /* different caps, we can't use this pool */
4491 GST_DEBUG_OBJECT (obj->dbg_obj, "pool has different caps");