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Rename access_t.psz_path to psz_location
[vlc/asuraparaju-public.git] / modules / access / v4l2.c
blob41baaf808db221085a581bfb878c003a44cc6346
1 /*****************************************************************************
2 * v4l2.c : Video4Linux2 input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2002-2009 the VideoLAN team
5 * $Id$
6 *
7 * Authors: Benjamin Pracht <bigben at videolan dot org>
8 * Richard Hosking <richard at hovis dot net>
9 * Antoine Cellerier <dionoea at videolan d.t org>
10 * Dennis Lou <dlou99 at yahoo dot com>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25 *****************************************************************************/
26
27 /*
28 * Sections based on the reference V4L2 capture example at
29 * http://v4l2spec.bytesex.org/spec/capture-example.html
30 */
31
32 /*****************************************************************************
33 * Preamble
34 *****************************************************************************/
35
36 #ifdef HAVE_CONFIG_H
37 # include "config.h"
38 #endif
39
40 #include <vlc_common.h>
41 #include <vlc_plugin.h>
42 #include <vlc_access.h>
43 #include <vlc_charset.h>
44 #include <vlc_fs.h>
45 #include <vlc_demux.h>
46 #include <vlc_input.h>
47
48 #include <ctype.h>
49 #include <errno.h>
50 #include <fcntl.h>
51 #include <sys/ioctl.h>
52 #include <sys/mman.h>
53
54 #include <linux/videodev2.h>
55
56 #include <poll.h>
57
58 #ifdef HAVE_LIBV4L2
59 # include <libv4l2.h>
60 #endif
61
62 /*****************************************************************************
63 * Module descriptior
64 *****************************************************************************/
65
66 static int DemuxOpen ( vlc_object_t * );
67 static void DemuxClose( vlc_object_t * );
68 static int AccessOpen ( vlc_object_t * );
69 static void AccessClose( vlc_object_t * );
70
71 #define STANDARD_TEXT N_( "Standard" )
72 #define STANDARD_LONGTEXT N_( \
73 "Video standard (Default, SECAM, PAL, or NTSC)." )
74 #define CHROMA_TEXT N_("Video input chroma format")
75 #define CHROMA_LONGTEXT N_( \
76 "Force the Video4Linux2 video device to use a specific chroma format " \
77 "(eg. I420 or I422 for raw images, MJPG for M-JPEG compressed input) " \
78 "(Complete list: GREY, I240, RV16, RV15, RV24, RV32, YUY2, YUYV, UYVY, " \
79 "I41N, I422, I420, I411, I410, MJPG)")
80 #define INPUT_TEXT N_( "Input" )
81 #define INPUT_LONGTEXT N_( \
82 "Input of the card to use (see debug)." )
83 #define AUDIO_INPUT_TEXT N_( "Audio input" )
84 #define AUDIO_INPUT_LONGTEXT N_( \
85 "Audio input of the card to use (see debug)." )
86 #define IOMETHOD_TEXT N_( "IO Method" )
87 #define IOMETHOD_LONGTEXT N_( \
88 "IO Method (READ, MMAP, USERPTR)." )
89 #define WIDTH_TEXT N_( "Width" )
90 #define WIDTH_LONGTEXT N_( \
91 "Force width (-1 for autodetect, 0 for driver default)." )
92 #define HEIGHT_TEXT N_( "Height" )
93 #define HEIGHT_LONGTEXT N_( \
94 "Force height (-1 for autodetect, 0 for driver default)." )
95 #define FPS_TEXT N_( "Framerate" )
96 #define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
97 "(0 for autodetect)." )
98
99 #ifdef HAVE_LIBV4L2
100 #define LIBV4L2_TEXT N_( "Use libv4l2" )
101 #define LIBV4L2_LONGTEXT N_( \
102 "Force usage of the libv4l2 wrapper." )
103 #endif
104
105 #define CTRL_RESET_TEXT N_( "Reset v4l2 controls" )
106 #define CTRL_RESET_LONGTEXT N_( \
107 "Reset controls to defaults provided by the v4l2 driver." )
108 #define BRIGHTNESS_TEXT N_( "Brightness" )
109 #define BRIGHTNESS_LONGTEXT N_( \
110 "Brightness of the video input (if supported by the v4l2 driver)." )
111 #define CONTRAST_TEXT N_( "Contrast" )
112 #define CONTRAST_LONGTEXT N_( \
113 "Contrast of the video input (if supported by the v4l2 driver)." )
114 #define SATURATION_TEXT N_( "Saturation" )
115 #define SATURATION_LONGTEXT N_( \
116 "Saturation of the video input (if supported by the v4l2 driver)." )
117 #define HUE_TEXT N_( "Hue" )
118 #define HUE_LONGTEXT N_( \
119 "Hue of the video input (if supported by the v4l2 driver)." )
120 #define BLACKLEVEL_TEXT N_( "Black level" )
121 #define BLACKLEVEL_LONGTEXT N_( \
122 "Black level of the video input (if supported by the v4l2 driver)." )
123 #define AUTOWHITEBALANCE_TEXT N_( "Auto white balance" )
124 #define AUTOWHITEBALANCE_LONGTEXT N_( \
125 "Automatically set the white balance of the video input " \
126 "(if supported by the v4l2 driver)." )
127 #define DOWHITEBALANCE_TEXT N_( "Do white balance" )
128 #define DOWHITEBALANCE_LONGTEXT N_( \
129 "Trigger a white balancing action, useless if auto white balance is " \
130 "activated (if supported by the v4l2 driver)." )
131 #define REDBALANCE_TEXT N_( "Red balance" )
132 #define REDBALANCE_LONGTEXT N_( \
133 "Red balance of the video input (if supported by the v4l2 driver)." )
134 #define BLUEBALANCE_TEXT N_( "Blue balance" )
135 #define BLUEBALANCE_LONGTEXT N_( \
136 "Blue balance of the video input (if supported by the v4l2 driver)." )
137 #define GAMMA_TEXT N_( "Gamma" )
138 #define GAMMA_LONGTEXT N_( \
139 "Gamma of the video input (if supported by the v4l2 driver)." )
140 #define EXPOSURE_TEXT N_( "Exposure" )
141 #define EXPOSURE_LONGTEXT N_( \
142 "Exposure of the video input (if supported by the v4L2 driver)." )
143 #define AUTOGAIN_TEXT N_( "Auto gain" )
144 #define AUTOGAIN_LONGTEXT N_( \
145 "Automatically set the video input's gain (if supported by the " \
146 "v4l2 driver)." )
147 #define GAIN_TEXT N_( "Gain" )
148 #define GAIN_LONGTEXT N_( \
149 "Video input's gain (if supported by the v4l2 driver)." )
150 #define HFLIP_TEXT N_( "Horizontal flip" )
151 #define HFLIP_LONGTEXT N_( \
152 "Flip the video horizontally (if supported by the v4l2 driver)." )
153 #define VFLIP_TEXT N_( "Vertical flip" )
154 #define VFLIP_LONGTEXT N_( \
155 "Flip the video vertically (if supported by the v4l2 driver)." )
156 #define HCENTER_TEXT N_( "Horizontal centering" )
157 #define HCENTER_LONGTEXT N_( \
158 "Set the camera's horizontal centering (if supported by the v4l2 driver)." )
159 #define VCENTER_TEXT N_( "Vertical centering" )
160 #define VCENTER_LONGTEXT N_( \
161 "Set the camera's vertical centering (if supported by the v4l2 driver)." )
162
163 #define AUDIO_VOLUME_TEXT N_( "Volume" )
164 #define AUDIO_VOLUME_LONGTEXT N_( \
165 "Volume of the audio input (if supported by the v4l2 driver)." )
166 #define AUDIO_BALANCE_TEXT N_( "Balance" )
167 #define AUDIO_BALANCE_LONGTEXT N_( \
168 "Balance of the audio input (if supported by the v4l2 driver)." )
169 #define AUDIO_MUTE_TEXT N_( "Mute" )
170 #define AUDIO_MUTE_LONGTEXT N_( \
171 "Mute audio input (if supported by the v4l2 driver)." )
172 #define AUDIO_BASS_TEXT N_( "Bass" )
173 #define AUDIO_BASS_LONGTEXT N_( \
174 "Bass level of the audio input (if supported by the v4l2 driver)." )
175 #define AUDIO_TREBLE_TEXT N_( "Treble" )
176 #define AUDIO_TREBLE_LONGTEXT N_( \
177 "Treble level of the audio input (if supported by the v4l2 driver)." )
178 #define AUDIO_LOUDNESS_TEXT N_( "Loudness" )
179 #define AUDIO_LOUDNESS_LONGTEXT N_( \
180 "Loudness of the audio input (if supported by the v4l2 driver)." )
181
182 #define CACHING_TEXT N_("Caching value in ms")
183 #define CACHING_LONGTEXT N_( \
184 "Caching value for V4L2 captures. This " \
185 "value should be set in milliseconds." )
186 #define S_CTRLS_TEXT N_("v4l2 driver controls")
187 #define S_CTRLS_LONGTEXT N_( \
188 "Set the v4l2 driver controls to the values specified using a comma " \
189 "separated list optionally encapsulated by curly braces " \
190 "(e.g.: {video_bitrate=6000000,audio_crc=0,stream_type=3} ). " \
191 "To list available controls, increase verbosity (-vvv) " \
192 "or use the v4l2-ctl application." )
193
194 #define TUNER_TEXT N_("Tuner id")
195 #define TUNER_LONGTEXT N_( \
196 "Tuner id (see debug output)." )
197 #define FREQUENCY_TEXT N_("Frequency")
198 #define FREQUENCY_LONGTEXT N_( \
199 "Tuner frequency in Hz or kHz (see debug output)" )
200 #define TUNER_AUDIO_MODE_TEXT N_("Audio mode")
201 #define TUNER_AUDIO_MODE_LONGTEXT N_( \
202 "Tuner audio mono/stereo and track selection." )
203
204 #define AUDIO_DEPRECATED_ERROR N_( \
205 "Alsa or OSS audio capture in the v4l2 access is deprecated. " \
206 "please use 'v4l2:/""/ :input-slave=alsa:/""/' or " \
207 "'v4l2:/""/ :input-slave=oss:/""/' instead." )
208
209 #define ASPECT_TEXT N_("Picture aspect-ratio n:m")
210 #define ASPECT_LONGTEXT N_("Define input picture aspect-ratio to use. Default is 4:3" )
211
212 typedef enum {
213 IO_METHOD_AUTO,
214 IO_METHOD_READ,
215 IO_METHOD_MMAP,
216 IO_METHOD_USERPTR,
217 } io_method;
218
219 static const int i_standards_list[] =
220 { V4L2_STD_UNKNOWN, V4L2_STD_SECAM, V4L2_STD_PAL, V4L2_STD_NTSC,
221 V4L2_STD_PAL_B, V4L2_STD_PAL_B1, V4L2_STD_PAL_G, V4L2_STD_PAL_H,
222 V4L2_STD_PAL_I, V4L2_STD_PAL_D, V4L2_STD_PAL_D1, V4L2_STD_PAL_K,
223 V4L2_STD_PAL_M, V4L2_STD_PAL_N, V4L2_STD_PAL_Nc, V4L2_STD_PAL_60,
224 V4L2_STD_NTSC_M, V4L2_STD_NTSC_M_JP, V4L2_STD_NTSC_443,
225 V4L2_STD_NTSC_M_KR,
226 V4L2_STD_SECAM_B, V4L2_STD_SECAM_D, V4L2_STD_SECAM_G,
227 V4L2_STD_SECAM_H, V4L2_STD_SECAM_K, V4L2_STD_SECAM_K1,
228 V4L2_STD_SECAM_L, V4L2_STD_SECAM_LC,
229 V4L2_STD_ATSC_8_VSB, V4L2_STD_ATSC_16_VSB,
230 };
231 static const char *const psz_standards_list_text[] =
232 { N_("Default"), "SECAM", "PAL", "NTSC",
233 "PAL_B", "PAL_B1", "PAL_G", "PAL_H", "PAL_I", "PAL_D",
234 "PAL_D1", "PAL_K", "PAL_M", "PAL_N", "PAL_Nc", "PAL_60",
235 "NTSC_M", "NTSC_M_JP", "NTSC_443", "NTSC_M_KR",
236 "SECAM_B", "SECAM_D", "SECAM_G", "SECAM_H", "SECAM_K",
237 "SECAM_K1", "SECAM_L", "SECAM_LC",
238 "ATSC_8_VSB", "ATSC_16_VSB"
239 };
240
241 static const int i_iomethod_list[] =
242 { IO_METHOD_AUTO, IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR };
243 static const char *const psz_iomethod_list_text[] =
244 { N_("AUTO"), N_("READ"), N_("MMAP"), N_("USERPTR") };
245
246 static const int i_tuner_audio_modes_list[] =
247 { V4L2_TUNER_MODE_MONO, V4L2_TUNER_MODE_STEREO,
248 V4L2_TUNER_MODE_LANG1, V4L2_TUNER_MODE_LANG2,
249 V4L2_TUNER_MODE_SAP, V4L2_TUNER_MODE_LANG1_LANG2 };
250 static const char *const psz_tuner_audio_modes_list_text[] =
251 { N_( "Mono" ),
252 N_( "Stereo" ),
253 N_( "Primary language (Analog TV tuners only)" ),
254 N_( "Secondary language (Analog TV tuners only)" ),
255 N_( "Second audio program (Analog TV tuners only)" ),
256 N_( "Primary language left, Secondary language right" ) };
257
258 #define V4L2_DEFAULT "/dev/video0"
259 #define CFG_PREFIX "v4l2-"
260
261 #ifdef HAVE_MAEMO
262 # define DEFAULT_WIDTH 640
263 # define DEFAULT_HEIGHT 492
264 #endif
265
266 #ifndef DEFAULT_WIDTH
267 # define DEFAULT_WIDTH (-1)
268 # define DEFAULT_HEIGHT (-1)
269 #endif
270
271 vlc_module_begin ()
272 set_shortname( N_("Video4Linux2") )
273 set_description( N_("Video4Linux2 input") )
274 set_category( CAT_INPUT )
275 set_subcategory( SUBCAT_INPUT_ACCESS )
276
277 set_section( N_( "Video input" ), NULL )
278 add_integer( CFG_PREFIX "standard", 0, NULL, STANDARD_TEXT,
279 STANDARD_LONGTEXT, false )
280 change_integer_list( i_standards_list, psz_standards_list_text, NULL )
281 add_string( CFG_PREFIX "chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
282 true )
283 add_integer( CFG_PREFIX "input", 0, NULL, INPUT_TEXT, INPUT_LONGTEXT,
284 true )
285 add_integer( CFG_PREFIX "audio-input", 0, NULL, AUDIO_INPUT_TEXT,
286 AUDIO_INPUT_LONGTEXT, true )
287 add_integer( CFG_PREFIX "io", IO_METHOD_AUTO, NULL, IOMETHOD_TEXT,
288 IOMETHOD_LONGTEXT, true )
289 change_integer_list( i_iomethod_list, psz_iomethod_list_text, NULL )
290 add_integer( CFG_PREFIX "width", DEFAULT_WIDTH, NULL, WIDTH_TEXT,
291 WIDTH_LONGTEXT, true )
292 add_integer( CFG_PREFIX "height", DEFAULT_HEIGHT, NULL, HEIGHT_TEXT,
293 HEIGHT_LONGTEXT, true )
294 add_string( CFG_PREFIX "aspect-ratio", "4:3", NULL, ASPECT_TEXT,
295 ASPECT_LONGTEXT, true )
296 add_float( CFG_PREFIX "fps", 0, NULL, FPS_TEXT, FPS_LONGTEXT, true )
297 add_integer( CFG_PREFIX "caching", 50 /* ms */, NULL,
298 CACHING_TEXT, CACHING_LONGTEXT, true )
299 #ifdef HAVE_LIBV4L2
300 add_bool( CFG_PREFIX "use-libv4l2", false, NULL, LIBV4L2_TEXT, LIBV4L2_LONGTEXT, true );
301 #endif
302
303 set_section( N_( "Tuner" ), NULL )
304 add_integer( CFG_PREFIX "tuner", 0, NULL, TUNER_TEXT, TUNER_LONGTEXT,
305 true )
306 add_integer( CFG_PREFIX "tuner-frequency", -1, NULL, FREQUENCY_TEXT,
307 FREQUENCY_LONGTEXT, true )
308 add_integer( CFG_PREFIX "tuner-audio-mode", -1, NULL, TUNER_AUDIO_MODE_TEXT,
309 TUNER_AUDIO_MODE_LONGTEXT, true )
310 change_integer_list( i_tuner_audio_modes_list,
311 psz_tuner_audio_modes_list_text, 0 )
312
313 set_section( N_( "Controls" ),
314 N_( "v4l2 driver controls, if supported by your v4l2 driver." ) )
315 add_bool( CFG_PREFIX "controls-reset", false, NULL, CTRL_RESET_TEXT,
316 CTRL_RESET_LONGTEXT, true )
317 add_integer( CFG_PREFIX "brightness", -1, NULL, BRIGHTNESS_TEXT,
318 BRIGHTNESS_LONGTEXT, true )
319 add_integer( CFG_PREFIX "contrast", -1, NULL, CONTRAST_TEXT,
320 CONTRAST_LONGTEXT, true )
321 add_integer( CFG_PREFIX "saturation", -1, NULL, SATURATION_TEXT,
322 SATURATION_LONGTEXT, true )
323 add_integer( CFG_PREFIX "hue", -1, NULL, HUE_TEXT,
324 HUE_LONGTEXT, true )
325 add_integer( CFG_PREFIX "black-level", -1, NULL, BLACKLEVEL_TEXT,
326 BLACKLEVEL_LONGTEXT, true )
327 add_integer( CFG_PREFIX "auto-white-balance", -1, NULL,
328 AUTOWHITEBALANCE_TEXT, AUTOWHITEBALANCE_LONGTEXT, true )
329 add_integer( CFG_PREFIX "do-white-balance", -1, NULL, DOWHITEBALANCE_TEXT,
330 DOWHITEBALANCE_LONGTEXT, true )
331 add_integer( CFG_PREFIX "red-balance", -1, NULL, REDBALANCE_TEXT,
332 REDBALANCE_LONGTEXT, true )
333 add_integer( CFG_PREFIX "blue-balance", -1, NULL, BLUEBALANCE_TEXT,
334 BLUEBALANCE_LONGTEXT, true )
335 add_integer( CFG_PREFIX "gamma", -1, NULL, GAMMA_TEXT,
336 GAMMA_LONGTEXT, true )
337 add_integer( CFG_PREFIX "exposure", -1, NULL, EXPOSURE_TEXT,
338 EXPOSURE_LONGTEXT, true )
339 add_integer( CFG_PREFIX "autogain", -1, NULL, AUTOGAIN_TEXT,
340 AUTOGAIN_LONGTEXT, true )
341 add_integer( CFG_PREFIX "gain", -1, NULL, GAIN_TEXT,
342 GAIN_LONGTEXT, true )
343 add_integer( CFG_PREFIX "hflip", -1, NULL, HFLIP_TEXT,
344 HFLIP_LONGTEXT, true )
345 add_integer( CFG_PREFIX "vflip", -1, NULL, VFLIP_TEXT,
346 VFLIP_LONGTEXT, true )
347 add_integer( CFG_PREFIX "hcenter", -1, NULL, HCENTER_TEXT,
348 HCENTER_LONGTEXT, true )
349 add_integer( CFG_PREFIX "vcenter", -1, NULL, VCENTER_TEXT,
350 VCENTER_LONGTEXT, true )
351 add_integer( CFG_PREFIX "audio-volume", -1, NULL, AUDIO_VOLUME_TEXT,
352 AUDIO_VOLUME_LONGTEXT, true )
353 add_integer( CFG_PREFIX "audio-balance", -1, NULL, AUDIO_BALANCE_TEXT,
354 AUDIO_BALANCE_LONGTEXT, true )
355 add_bool( CFG_PREFIX "audio-mute", false, NULL, AUDIO_MUTE_TEXT,
356 AUDIO_MUTE_LONGTEXT, true )
357 add_integer( CFG_PREFIX "audio-bass", -1, NULL, AUDIO_BASS_TEXT,
358 AUDIO_BASS_LONGTEXT, true )
359 add_integer( CFG_PREFIX "audio-treble", -1, NULL, AUDIO_TREBLE_TEXT,
360 AUDIO_TREBLE_LONGTEXT, true )
361 add_integer( CFG_PREFIX "audio-loudness", -1, NULL, AUDIO_LOUDNESS_TEXT,
362 AUDIO_LOUDNESS_LONGTEXT, true )
363 add_string( CFG_PREFIX "set-ctrls", NULL, NULL, S_CTRLS_TEXT,
364 S_CTRLS_LONGTEXT, true )
365
366 add_obsolete_string( CFG_PREFIX "dev" )
367
368 add_obsolete_string( CFG_PREFIX "adev" )
369 add_obsolete_integer( CFG_PREFIX "audio-method" )
370 add_obsolete_bool( CFG_PREFIX "stereo" )
371 add_obsolete_integer( CFG_PREFIX "samplerate" )
372
373 add_shortcut( "v4l2" )
374 set_capability( "access_demux", 10 )
375 set_callbacks( DemuxOpen, DemuxClose )
376
377 add_submodule ()
378 add_shortcut( "v4l2" )
379 add_shortcut( "v4l2c" )
380 set_description( N_("Video4Linux2 Compressed A/V") )
381 set_capability( "access", 0 )
382 /* use these when open as access_demux fails; VLC will use another demux */
383 set_callbacks( AccessOpen, AccessClose )
384
385 vlc_module_end ()
386
387 /*****************************************************************************
388 * Access: local prototypes
389 *****************************************************************************/
390
391 static void CommonClose( vlc_object_t *, demux_sys_t * );
392 static void ParseMRL( demux_sys_t *, char *, vlc_object_t * );
393 static void GetV4L2Params( demux_sys_t *, vlc_object_t * );
394 static void SetAvailControlsByString( vlc_object_t *, demux_sys_t *, int );
395
396 static int DemuxControl( demux_t *, int, va_list );
397 static int AccessControl( access_t *, int, va_list );
398
399 static int Demux( demux_t * );
400 static block_t *AccessRead( access_t * );
401 static ssize_t AccessReadStream( access_t * p_access, uint8_t * p_buffer, size_t i_len );
402
403 static block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys );
404 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t );
405
406 static bool IsPixelFormatSupported( demux_t *p_demux,
407 unsigned int i_pixelformat );
408
409 static int OpenVideoDev( vlc_object_t *, demux_sys_t *, bool );
410 static bool ProbeVideoDev( vlc_object_t *, demux_sys_t *,
411 const char *psz_device );
412
413 static int ControlList( vlc_object_t *, demux_sys_t *, int , bool, bool );
414 static int Control( vlc_object_t *, demux_sys_t *, int i_fd,
415 const char *psz_name, int i_cid, int i_value );
416
417 static int DemuxControlCallback( vlc_object_t *p_this, const char *psz_var,
418 vlc_value_t oldval, vlc_value_t newval,
419 void *p_data );
420 static int DemuxControlResetCallback( vlc_object_t *p_this, const char *psz_var,
421 vlc_value_t oldval, vlc_value_t newval,
422 void *p_data );
423 static int AccessControlCallback( vlc_object_t *p_this, const char *psz_var,
424 vlc_value_t oldval, vlc_value_t newval,
425 void *p_data );
426 static int AccessControlResetCallback( vlc_object_t *p_this,
427 const char *psz_var, vlc_value_t oldval,
428 vlc_value_t newval, void *p_data );
429
430 static const struct
431 {
432 unsigned int i_v4l2;
433 vlc_fourcc_t i_fourcc;
434 int i_rmask;
435 int i_gmask;
436 int i_bmask;
437 } v4l2chroma_to_fourcc[] =
438 {
439 /* Raw data types */
440 { V4L2_PIX_FMT_GREY, VLC_CODEC_GREY, 0, 0, 0 },
441 { V4L2_PIX_FMT_HI240, VLC_FOURCC('I','2','4','0'), 0, 0, 0 },
442 { V4L2_PIX_FMT_RGB555, VLC_CODEC_RGB15, 0x001f,0x03e0,0x7c00 },
443 { V4L2_PIX_FMT_RGB565, VLC_CODEC_RGB16, 0x001f,0x07e0,0xf800 },
444 /* Won't work since we don't know how to handle such gmask values
445 * correctly
446 { V4L2_PIX_FMT_RGB555X, VLC_CODEC_RGB15, 0x007c,0xe003,0x1f00 },
447 { V4L2_PIX_FMT_RGB565X, VLC_CODEC_RGB16, 0x00f8,0xe007,0x1f00 },
448 */
449 { V4L2_PIX_FMT_BGR24, VLC_CODEC_RGB24, 0xff0000,0xff00,0xff },
450 { V4L2_PIX_FMT_RGB24, VLC_CODEC_RGB24, 0xff,0xff00,0xff0000 },
451 { V4L2_PIX_FMT_BGR32, VLC_CODEC_RGB32, 0xff0000,0xff00,0xff },
452 { V4L2_PIX_FMT_RGB32, VLC_CODEC_RGB32, 0xff,0xff00,0xff0000 },
453 { V4L2_PIX_FMT_YUYV, VLC_CODEC_YUYV, 0, 0, 0 },
454 { V4L2_PIX_FMT_UYVY, VLC_CODEC_UYVY, 0, 0, 0 },
455 { V4L2_PIX_FMT_Y41P, VLC_FOURCC('I','4','1','N'), 0, 0, 0 },
456 { V4L2_PIX_FMT_YUV422P, VLC_CODEC_I422, 0, 0, 0 },
457 { V4L2_PIX_FMT_YVU420, VLC_CODEC_YV12, 0, 0, 0 },
458 { V4L2_PIX_FMT_YUV411P, VLC_CODEC_I411, 0, 0, 0 },
459 { V4L2_PIX_FMT_YUV410, VLC_CODEC_I410, 0, 0, 0 },
460
461 /* Raw data types, not in V4L2 spec but still in videodev2.h and supported
462 * by VLC */
463 { V4L2_PIX_FMT_YUV420, VLC_CODEC_I420, 0, 0, 0 },
464 /* FIXME { V4L2_PIX_FMT_RGB444, VLC_CODEC_RGB32 }, */
465
466 /* Compressed data types */
467 { V4L2_PIX_FMT_MJPEG, VLC_CODEC_MJPG, 0, 0, 0 },
468 { V4L2_PIX_FMT_JPEG, VLC_CODEC_JPEG, 0, 0, 0 },
469 #if 0
470 { V4L2_PIX_FMT_DV, VLC_FOURCC('?','?','?','?') },
471 { V4L2_PIX_FMT_MPEG, VLC_FOURCC('?','?','?','?') },
472 #endif
473 { 0, 0, 0, 0, 0 }
474 };
475
476 /**
477 * List of V4L2 chromas were confident enough to use as fallbacks if the
478 * user hasn't provided a --v4l2-chroma value.
479 *
480 * Try YUV chromas first, then RGB little endian and MJPEG as last resort.
481 */
482 static const uint32_t p_chroma_fallbacks[] =
483 { V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_YVU420, V4L2_PIX_FMT_YUV422P,
484 V4L2_PIX_FMT_YUYV, V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_BGR24,
485 V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_MJPEG, V4L2_PIX_FMT_JPEG };
486
487 static const struct
488 {
489 const char *psz_name;
490 unsigned int i_cid;
491 } controls[] =
492 {
493 { "brightness", V4L2_CID_BRIGHTNESS },
494 { "contrast", V4L2_CID_CONTRAST },
495 { "saturation", V4L2_CID_SATURATION },
496 { "hue", V4L2_CID_HUE },
497 { "audio-volume", V4L2_CID_AUDIO_VOLUME },
498 { "audio-balance", V4L2_CID_AUDIO_BALANCE },
499 { "audio-bass", V4L2_CID_AUDIO_BASS },
500 { "audio-treble", V4L2_CID_AUDIO_TREBLE },
501 { "audio-mute", V4L2_CID_AUDIO_MUTE },
502 { "audio-loudness", V4L2_CID_AUDIO_LOUDNESS },
503 { "black-level", V4L2_CID_BLACK_LEVEL },
504 { "auto-white-balance", V4L2_CID_AUTO_WHITE_BALANCE },
505 { "do-white-balance", V4L2_CID_DO_WHITE_BALANCE },
506 { "red-balance", V4L2_CID_RED_BALANCE },
507 { "blue-balance", V4L2_CID_BLUE_BALANCE },
508 { "gamma", V4L2_CID_GAMMA },
509 { "exposure", V4L2_CID_EXPOSURE },
510 { "autogain", V4L2_CID_AUTOGAIN },
511 { "gain", V4L2_CID_GAIN },
512 { "hflip", V4L2_CID_HFLIP },
513 { "vflip", V4L2_CID_VFLIP },
514 { "hcenter", V4L2_CID_HCENTER },
515 { "vcenter", V4L2_CID_VCENTER },
516 { NULL, 0 }
517 };
518
519 struct buffer_t
520 {
521 void * start;
522 size_t length;
523 };
524
525 struct demux_sys_t
526 {
527 char *psz_device; /* Main device from MRL */
528 int i_fd;
529
530 char *psz_requested_chroma;
531
532 /* Video */
533 io_method io;
534
535 int i_cache;
536
537 struct v4l2_capability dev_cap;
538
539 int i_input;
540 struct v4l2_input *p_inputs;
541 int i_selected_input;
542
543 int i_standard;
544 struct v4l2_standard *p_standards;
545 v4l2_std_id i_selected_standard_id;
546
547 int i_audio;
548 /* V4L2 devices cannot have more than 32 audio inputs */
549 struct v4l2_audio p_audios[32];
550 int i_selected_audio_input;
551
552 int i_tuner;
553 struct v4l2_tuner *p_tuners;
554
555 int i_codec;
556 struct v4l2_fmtdesc *p_codecs;
557
558 struct buffer_t *p_buffers;
559 unsigned int i_nbuffers;
560
561 int i_width;
562 int i_height;
563 unsigned int i_aspect;
564 float f_fps; /* <= 0.0 mean to grab at full rate */
565 mtime_t i_video_pts; /* only used when f_fps > 0 */
566 int i_fourcc;
567 uint32_t i_block_flags;
568
569 es_out_id_t *p_es;
570
571 /* Tuner */
572 int i_cur_tuner;
573 int i_frequency;
574 int i_audio_mode;
575
576 /* Controls */
577 char *psz_set_ctrls;
578
579
580 #ifdef HAVE_LIBV4L2
581 /* */
582 int (*pf_open)(const char *, int, ...);
583 int (*pf_close)( int );
584 int (*pf_dup)( int );
585 int (*pf_ioctl)( int, unsigned long int, ... );
586 ssize_t (*pf_read)( int, void *, size_t );
587 void *(*pf_mmap)( void *, size_t, int, int, int, off_t );
588 int (*pf_munmap)( void *, size_t );
589 bool b_libv4l2;
590 #endif
591 };
592
593 #ifdef HAVE_LIBV4L2
594 static void use_kernel_v4l2( demux_sys_t *p_sys )
595 {
596 p_sys->pf_open = vlc_open;
597 p_sys->pf_close = close;
598 p_sys->pf_dup = dup;
599 p_sys->pf_ioctl = ioctl;
600 p_sys->pf_read = read;
601 p_sys->pf_mmap = mmap;
602 p_sys->pf_munmap = munmap;
603 p_sys->b_libv4l2 = false;
604 }
605
606 static void use_libv4l2( demux_sys_t *p_sys )
607 {
608 p_sys->pf_open = v4l2_open;
609 p_sys->pf_close = v4l2_close;
610 p_sys->pf_dup = v4l2_dup;
611 p_sys->pf_ioctl = v4l2_ioctl;
612 p_sys->pf_read = v4l2_read;
613 p_sys->pf_mmap = v4l2_mmap;
614 p_sys->pf_munmap = v4l2_munmap;
615 p_sys->b_libv4l2 = true;
616 }
617
618 # define v4l2_open (p_sys->pf_open)
619 # define v4l2_close (p_sys->pf_close)
620 # define v4l2_dup (p_sys->pf_dup)
621 # define v4l2_ioctl (p_sys->pf_ioctl)
622 # define v4l2_read (p_sys->pf_read)
623 # define v4l2_mmap (p_sys->pf_mmap)
624 # define v4l2_munmap (p_sys->pf_munmap)
625 #else
626 # define v4l2_open vlc_open
627 # define v4l2_close close
628 # define v4l2_dup dup
629 # define v4l2_ioctl ioctl
630 # define v4l2_read read
631 # define v4l2_mmap mmap
632 # define v4l2_munmap munmap
633 #endif
634
635 static int FindMainDevice( vlc_object_t *p_this, demux_sys_t *p_sys,
636 bool b_demux )
637 {
638 /* TODO: if using default device, loop through all /dev/video* until
639 * one works */
640 msg_Dbg( p_this, "opening device '%s'", p_sys->psz_device );
641 if( ProbeVideoDev( p_this, p_sys, p_sys->psz_device ) )
642 {
643 msg_Dbg( p_this, "'%s' is a video device", p_sys->psz_device );
644 p_sys->i_fd = OpenVideoDev( p_this, p_sys, b_demux );
645 }
646
647 if( p_sys->i_fd < 0 ) return VLC_EGENERIC;
648 return VLC_SUCCESS;
649 }
650
651 /*****************************************************************************
652 * DemuxOpen: opens v4l2 device, access_demux callback
653 *****************************************************************************
654 *
655 * url: <video device>::::
656 *
657 *****************************************************************************/
658 static int DemuxOpen( vlc_object_t *p_this )
659 {
660 demux_t *p_demux = (demux_t*)p_this;
661 demux_sys_t *p_sys;
662
663 /* Only when selected */
664 if( strcmp( p_demux->psz_access, "v4l2" ) )
665 return VLC_EGENERIC;
666
667 /* Set up p_demux */
668 p_demux->pf_control = DemuxControl;
669 p_demux->pf_demux = Demux;
670 p_demux->info.i_update = 0;
671 p_demux->info.i_title = 0;
672 p_demux->info.i_seekpoint = 0;
673
674 p_demux->p_sys = p_sys = calloc( 1, sizeof( demux_sys_t ) );
675 if( p_sys == NULL ) return VLC_ENOMEM;
676
677 GetV4L2Params(p_sys, (vlc_object_t *) p_demux);
678
679 ParseMRL( p_sys, p_demux->psz_path, (vlc_object_t *) p_demux );
680
681 #ifdef HAVE_LIBV4L2
682 if( !var_InheritInteger( p_this, CFG_PREFIX "use-libv4l2" ) )
683 {
684 msg_Dbg( p_this, "Trying direct kernel v4l2" );
685 use_kernel_v4l2( p_sys );
686 if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
687 return VLC_SUCCESS;
688 }
689
690 msg_Dbg( p_this, "Trying libv4l2 wrapper" );
691 use_libv4l2( p_sys );
692 #endif
693 if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
694 return VLC_SUCCESS;
695
696 DemuxClose( p_this );
697 return VLC_EGENERIC;
698 }
699
700 /*****************************************************************************
701 * GetV4L2Params: fill in p_sys parameters (shared by DemuxOpen and AccessOpen)
702 *****************************************************************************/
703 static void GetV4L2Params( demux_sys_t *p_sys, vlc_object_t *p_obj )
704 {
705 p_sys->i_video_pts = -1;
706
707 p_sys->i_selected_standard_id =
708 i_standards_list[var_CreateGetInteger( p_obj, "v4l2-standard" )];
709
710 p_sys->i_selected_input = var_CreateGetInteger( p_obj, "v4l2-input" );
711 p_sys->i_selected_audio_input =
712 var_CreateGetInteger( p_obj, "v4l2-audio-input" );
713
714 p_sys->io = var_CreateGetInteger( p_obj, "v4l2-io" );
715
716 p_sys->i_width = var_CreateGetInteger( p_obj, "v4l2-width" );
717 p_sys->i_height = var_CreateGetInteger( p_obj, "v4l2-height" );
718
719 var_Create( p_obj, "v4l2-controls-reset", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
720
721 p_sys->f_fps = var_CreateGetFloat( p_obj, "v4l2-fps" );
722 p_sys->psz_requested_chroma = var_CreateGetString( p_obj, "v4l2-chroma" );
723
724 p_sys->i_cache = var_CreateGetInteger( p_obj, "v4l2-caching" );
725
726 p_sys->i_cur_tuner = var_CreateGetInteger( p_obj, "v4l2-tuner" );
727 p_sys->i_frequency = var_CreateGetInteger( p_obj, "v4l2-tuner-frequency" );
728 p_sys->i_audio_mode = var_CreateGetInteger( p_obj, "v4l2-tuner-audio-mode" );
729
730 p_sys->psz_set_ctrls = var_CreateGetString( p_obj, "v4l2-set-ctrls" );
731
732 char *psz_aspect = var_CreateGetString( p_obj, "v4l2-aspect-ratio" );
733 char *psz_delim = !EMPTY_STR(psz_aspect) ? strchr( psz_aspect, ':' ) : NULL;
734 if( psz_delim )
735 {
736 p_sys->i_aspect = atoi( psz_aspect ) * VOUT_ASPECT_FACTOR / atoi( psz_delim + 1 );
737 }
738 else
739 {
740 p_sys->i_aspect = 4 * VOUT_ASPECT_FACTOR / 3 ;
741
742 }
743 free( psz_aspect );
744
745 p_sys->psz_device = NULL;
746 p_sys->i_fd = -1;
747
748 p_sys->p_es = NULL;
749 }
750
751 /*****************************************************************************
752 * ParseMRL: parse the options contained in the MRL
753 *****************************************************************************/
754 static void ParseMRL( demux_sys_t *p_sys, char *psz_path, vlc_object_t *p_obj )
755 {
756 char *psz_dup = strdup( psz_path );
757 char *psz_parser = psz_dup;
758
759 while( *psz_parser && *psz_parser != ':' )
760 {
761 psz_parser++;
762 }
763
764 if( *psz_parser == ':' )
765 {
766 /* read options */
767 for( ;; )
768 {
769 *psz_parser++ = '\0';
770
771 if( !strncmp( psz_parser, "standard=", strlen( "standard=" ) ) )
772 {
773 psz_parser += strlen( "standard=" );
774 size_t i;
775 for( i = 0; i < ARRAY_SIZE(psz_standards_list_text); i++ )
776 {
777 const char *psz_value = psz_standards_list_text[i];
778 size_t i_len = strlen( psz_value );
779 if( !strncasecmp( psz_parser, psz_value, i_len ) &&
780 ( psz_parser[i_len] == ':' || psz_parser[i_len] == 0 ) )
781 {
782 p_sys->i_selected_standard_id = i_standards_list[i];
783 psz_parser += i_len;
784 break;
785 }
786 }
787
788 if( i == ARRAY_SIZE(psz_standards_list_text) )
789 p_sys->i_selected_standard_id = i_standards_list[strtol( psz_parser, &psz_parser, 0 )];
790 }
791 else if( !strncmp( psz_parser, "chroma=", strlen( "chroma=" ) ) )
792 {
793 int i_len;
794
795 psz_parser += strlen( "chroma=" );
796 if( strchr( psz_parser, ':' ) )
797 {
798 i_len = strchr( psz_parser, ':' ) - psz_parser;
799 }
800 else
801 {
802 i_len = strlen( psz_parser );
803 }
804
805 free( p_sys->psz_requested_chroma );
806 p_sys->psz_requested_chroma = strndup( psz_parser, i_len );
807
808 psz_parser += i_len;
809 }
810 else if( !strncmp( psz_parser, "input=", strlen( "input=" ) ) )
811 {
812 p_sys->i_selected_input = strtol( psz_parser + strlen( "input=" ),
813 &psz_parser, 0 );
814 }
815 else if( !strncmp( psz_parser, "audio-input=", strlen( "audio-input=" ) ) )
816 {
817 p_sys->i_selected_audio_input = strtol( psz_parser + strlen( "audio-input=" ),
818 &psz_parser, 0 );
819 }
820 else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
821 {
822 p_sys->f_fps = us_strtof( psz_parser + strlen( "fps=" ),
823 &psz_parser );
824 }
825 else if( !strncmp( psz_parser, "io=", strlen( "io=" ) ) )
826 {
827 psz_parser += strlen( "io=" );
828 if( !strncmp( psz_parser, "read", strlen( "read" ) ) )
829 {
830 p_sys->io = IO_METHOD_READ;
831 psz_parser += strlen( "read" );
832 }
833 else if( !strncmp( psz_parser, "mmap", strlen( "mmap" ) ) )
834 {
835 p_sys->io = IO_METHOD_MMAP;
836 psz_parser += strlen( "mmap" );
837 }
838 else if( !strncmp( psz_parser, "userptr", strlen( "userptr" ) ) )
839 {
840 p_sys->io = IO_METHOD_USERPTR;
841 psz_parser += strlen( "userptr" );
842 }
843 else if( !strncmp( psz_parser, "auto", strlen( "auto" ) ) )
844 {
845 p_sys->io = IO_METHOD_AUTO;
846 psz_parser += strlen( "auto" );
847 }
848 else
849 {
850 p_sys->io = strtol( psz_parser, &psz_parser, 0 );
851 }
852 }
853 else if( !strncmp( psz_parser, "width=",
854 strlen( "width=" ) ) )
855 {
856 p_sys->i_width =
857 strtol( psz_parser + strlen( "width=" ),
858 &psz_parser, 0 );
859 }
860 else if( !strncmp( psz_parser, "height=",
861 strlen( "height=" ) ) )
862 {
863 p_sys->i_height =
864 strtol( psz_parser + strlen( "height=" ),
865 &psz_parser, 0 );
866 }
867 else if( !strncmp( psz_parser, "aspect-ratio=",
868 strlen( "aspect-ratio=" ) ) )
869 {
870 unsigned int num,den;
871 num = strtol( psz_parser + strlen( "aspect-ratio=" ),
872 &psz_parser, 0 );
873 den = strtol( psz_parser + strlen( ":" ),
874 &psz_parser, 0 );
875 if( num && den )
876 p_sys->i_aspect = num * VOUT_ASPECT_FACTOR / den;
877 }
878 else if( !strncmp( psz_parser, "controls-reset",
879 strlen( "controls-reset" ) ) )
880 {
881 var_SetBool( p_obj, "v4l2-controls-reset", true );
882 psz_parser += strlen( "controls-reset" );
883 }
884 #if 0
885 else if( !strncmp( psz_parser, "brightness=",
886 strlen( "brightness=" ) ) )
887 {
888 var_SetInteger( p_obj, "brightness",
889 strtol( psz_parser + strlen( "brightness=" ),
890 &psz_parser, 0 ) );
891 }
892 else if( !strncmp( psz_parser, "contrast=",
893 strlen( "contrast=" ) ) )
894 {
895 var_SetInteger( p_obj, "contrast",
896 strtol( psz_parser + strlen( "contrast=" ),
897 &psz_parser, 0 ) );
898 }
899 else if( !strncmp( psz_parser, "saturation=",
900 strlen( "saturation=" ) ) )
901 {
902 var_SetInteger( p_obj, "saturation",
903 strtol( psz_parser + strlen( "saturation=" ),
904 &psz_parser, 0 ) );
905 }
906 else if( !strncmp( psz_parser, "hue=",
907 strlen( "hue=" ) ) )
908 {
909 var_SetInteger( p_obj, "hue",
910 strtol( psz_parser + strlen( "hue=" ),
911 &psz_parser, 0 ) );
912 }
913 else if( !strncmp( psz_parser, "gamma=",
914 strlen( "gamma=" ) ) )
915 {
916 var_SetInteger( p_obj, "gamma",
917 strtol( psz_parser + strlen( "gamma=" ),
918 &psz_parser, 0 ) );
919 }
920 #endif
921 else if( !strncmp( psz_parser, "caching=", strlen( "caching=" ) ) )
922 {
923 p_sys->i_cache = strtol( psz_parser + strlen( "caching=" ),
924 &psz_parser, 0 );
925 }
926 else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
927 {
928 p_sys->i_cur_tuner = strtol( psz_parser + strlen( "tuner=" ),
929 &psz_parser, 0 );
930 }
931 else if( !strncmp( psz_parser, "tuner-frequency=", strlen( "tuner-frequency=" ) ) )
932 {
933 p_sys->i_frequency = strtol( psz_parser
934 + strlen( "tuner-frequency=" ),
935 &psz_parser, 0 );
936 }
937 else if( !strncmp( psz_parser, "tuner-audio-mode=", strlen( "tuner-audio-mode=" ) ) )
938 {
939 p_sys->i_audio_mode = strtol( psz_parser
940 + strlen( "tuner-audio-mode=" ),
941 &psz_parser, 0 );
942 }
943 else if( !strncmp( psz_parser, "set-ctrls=", strlen( "set-ctrls=" )) )
944 {
945 int i_len;
946
947 psz_parser += strlen( "set-ctrls=" );
948 if( strchr( psz_parser, ':' ) )
949 {
950 i_len = strchr( psz_parser, ':' ) - psz_parser;
951 }
952 else
953 {
954 i_len = strlen( psz_parser );
955 }
956
957 p_sys->psz_set_ctrls = strndup( psz_parser, i_len );
958
959 psz_parser += i_len;
960 }
961 else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) )
962 || !strncmp( psz_parser, "samplerate=", strlen( "samplerate=" ) )
963 || !strncmp( psz_parser, "audio-method", strlen( "audio-method" ) )
964 || !strncmp( psz_parser, "stereo", strlen( "stereo" ) )
965 || !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
966 {
967 if( strchr( psz_parser, ':' ) )
968 {
969 psz_parser = strchr( psz_parser, ':' );
970 }
971 else
972 {
973 psz_parser += strlen( psz_parser );
974 }
975
976 msg_Err( p_obj, AUDIO_DEPRECATED_ERROR );
977 }
978 else
979 {
980 char *psz_unk = strchr( psz_parser, ':' );
981 if (psz_unk)
982 psz_unk = strndup( psz_parser, psz_unk - psz_parser );
983 else
984 psz_unk = strdup( psz_parser);
985 msg_Warn( p_obj, "unknown option %s", psz_unk );
986 free (psz_unk);
987 }
988
989 while( *psz_parser && *psz_parser != ':' )
990 {
991 psz_parser++;
992 }
993
994 if( *psz_parser == '\0' )
995 {
996 break;
997 }
998 }
999 }
1000
1001 /* Main device */
1002 if( *psz_dup )
1003 p_sys->psz_device = strdup( psz_dup );
1004 else
1005 p_sys->psz_device = strdup( V4L2_DEFAULT );
1006 free( psz_dup );
1007 }
1008
1009 /*****************************************************************************
1010 * Close: close device, free resources
1011 *****************************************************************************/
1012 static void AccessClose( vlc_object_t *p_this )
1013 {
1014 access_t *p_access = (access_t *)p_this;
1015 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
1016
1017 CommonClose( p_this, p_sys );
1018 }
1019
1020 static void DemuxClose( vlc_object_t *p_this )
1021 {
1022 struct v4l2_buffer buf;
1023 enum v4l2_buf_type buf_type;
1024 unsigned int i;
1025
1026 demux_t *p_demux = (demux_t *)p_this;
1027 demux_sys_t *p_sys = p_demux->p_sys;
1028
1029 /* Stop video capture */
1030 if( p_sys->i_fd >= 0 )
1031 {
1032 switch( p_sys->io )
1033 {
1034 case IO_METHOD_READ:
1035 /* Nothing to do */
1036 break;
1037
1038 case IO_METHOD_MMAP:
1039 case IO_METHOD_USERPTR:
1040 /* Some drivers 'hang' internally if this is not done before streamoff */
1041 for( unsigned int i = 0; i < p_sys->i_nbuffers; i++ )
1042 {
1043 memset( &buf, 0, sizeof(buf) );
1044 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1045 buf.memory = ( p_sys->io == IO_METHOD_USERPTR ) ?
1046 V4L2_MEMORY_USERPTR : V4L2_MEMORY_MMAP;
1047 v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ); /* ignore result */
1048 }
1049
1050 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1051 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_STREAMOFF, &buf_type ) < 0 ) {
1052 msg_Err( p_this, "VIDIOC_STREAMOFF failed" );
1053 }
1054
1055 break;
1056
1057 default:
1058 break;
1059 }
1060 }
1061
1062 /* Free Video Buffers */
1063 if( p_sys->p_buffers ) {
1064 switch( p_sys->io )
1065 {
1066 case IO_METHOD_READ:
1067 free( p_sys->p_buffers[0].start );
1068 break;
1069
1070 case IO_METHOD_MMAP:
1071 for( i = 0; i < p_sys->i_nbuffers; ++i )
1072 {
1073 if( v4l2_munmap( p_sys->p_buffers[i].start, p_sys->p_buffers[i].length ) )
1074 {
1075 msg_Err( p_this, "munmap failed" );
1076 }
1077 }
1078 break;
1079
1080 case IO_METHOD_USERPTR:
1081 for( i = 0; i < p_sys->i_nbuffers; ++i )
1082 {
1083 free( p_sys->p_buffers[i].start );
1084 }
1085 break;
1086
1087 default:
1088 break;
1089 }
1090 free( p_sys->p_buffers );
1091 }
1092
1093 CommonClose( p_this, p_sys );
1094 }
1095
1096 static void CommonClose( vlc_object_t *p_this, demux_sys_t *p_sys )
1097 {
1098 (void)p_this;
1099 /* Close */
1100 if( p_sys->i_fd >= 0 ) v4l2_close( p_sys->i_fd );
1101 free( p_sys->psz_device );
1102 free( p_sys->p_standards );
1103 free( p_sys->p_inputs );
1104 free( p_sys->p_tuners );
1105 free( p_sys->p_codecs );
1106 free( p_sys->psz_requested_chroma );
1107 free( p_sys->psz_set_ctrls );
1108
1109 free( p_sys );
1110 }
1111
1112 /*****************************************************************************
1113 * AccessOpen: opens v4l2 device, access callback
1114 *****************************************************************************
1115 *
1116 * url: <video device>::::
1117 *
1118 *****************************************************************************/
1119 static int AccessOpen( vlc_object_t * p_this )
1120 {
1121 access_t *p_access = (access_t*) p_this;
1122 demux_sys_t * p_sys;
1123
1124 /* Only when selected */
1125 if( *p_access->psz_access == '\0' ) return VLC_EGENERIC;
1126
1127 access_InitFields( p_access );
1128 p_sys = calloc( 1, sizeof( demux_sys_t ));
1129 if( !p_sys ) return VLC_ENOMEM;
1130 p_access->p_sys = (access_sys_t*)p_sys;
1131
1132 GetV4L2Params( p_sys, (vlc_object_t *) p_access );
1133
1134 ParseMRL( p_sys, p_access->psz_location, (vlc_object_t *) p_access );
1135
1136 #ifdef HAVE_LIBV4L2
1137 if( !var_InheritInteger( p_this, CFG_PREFIX "use-libv4l2" ) )
1138 {
1139 msg_Dbg( p_this, "Trying direct kernel v4l2" );
1140 use_kernel_v4l2( p_sys );
1141 if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS)
1142 {
1143 if( p_sys->io == IO_METHOD_READ )
1144 {
1145 ACCESS_SET_CALLBACKS( AccessReadStream, NULL, AccessControl, NULL );
1146 }
1147 else
1148 {
1149 ACCESS_SET_CALLBACKS( NULL, AccessRead, AccessControl, NULL );
1150 }
1151 return VLC_SUCCESS;
1152 }
1153 }
1154
1155 msg_Dbg( p_this, "Trying libv4l2 wrapper" );
1156 use_libv4l2( p_sys );
1157 #endif
1158 if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS )
1159 {
1160 if( p_sys->io == IO_METHOD_READ )
1161 {
1162 ACCESS_SET_CALLBACKS( AccessReadStream, NULL, AccessControl, NULL );
1163 }
1164 else
1165 {
1166 ACCESS_SET_CALLBACKS( NULL, AccessRead, AccessControl, NULL );
1167 }
1168 return VLC_SUCCESS;
1169 }
1170
1171 AccessClose( p_this );
1172 return VLC_EGENERIC;
1173 }
1174
1175 /*****************************************************************************
1176 * DemuxControl:
1177 *****************************************************************************/
1178 static int DemuxControl( demux_t *p_demux, int i_query, va_list args )
1179 {
1180 switch( i_query )
1181 {
1182 /* Special for access_demux */
1183 case DEMUX_CAN_PAUSE:
1184 case DEMUX_CAN_SEEK:
1185 case DEMUX_CAN_CONTROL_PACE:
1186 *va_arg( args, bool * ) = false;
1187 return VLC_SUCCESS;
1188
1189 case DEMUX_GET_PTS_DELAY:
1190 *va_arg(args,int64_t *) = (int64_t)p_demux->p_sys->i_cache*1000;
1191 return VLC_SUCCESS;
1192
1193 case DEMUX_GET_TIME:
1194 *va_arg( args, int64_t * ) = mdate();
1195 return VLC_SUCCESS;
1196
1197 /* TODO implement others */
1198 default:
1199 return VLC_EGENERIC;
1200 }
1201
1202 return VLC_EGENERIC;
1203 }
1204
1205 /*****************************************************************************
1206 * AccessControl: access callback
1207 *****************************************************************************/
1208 static int AccessControl( access_t *p_access, int i_query, va_list args )
1209 {
1210 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
1211
1212 switch( i_query )
1213 {
1214 /* */
1215 case ACCESS_CAN_SEEK:
1216 case ACCESS_CAN_FASTSEEK:
1217 case ACCESS_CAN_PAUSE:
1218 case ACCESS_CAN_CONTROL_PACE:
1219 *va_arg( args, bool* ) = false;
1220 break;
1221
1222 /* */
1223 case ACCESS_GET_PTS_DELAY:
1224 *va_arg(args,int64_t *) = (int64_t)p_sys->i_cache*1000;
1225 break;
1226
1227 /* */
1228 case ACCESS_SET_PAUSE_STATE:
1229 /* Nothing to do */
1230 break;
1231
1232 case ACCESS_GET_TITLE_INFO:
1233 case ACCESS_SET_TITLE:
1234 case ACCESS_SET_SEEKPOINT:
1235 case ACCESS_SET_PRIVATE_ID_STATE:
1236 case ACCESS_GET_CONTENT_TYPE:
1237 case ACCESS_GET_META:
1238 return VLC_EGENERIC;
1239
1240 default:
1241 msg_Warn( p_access, "Unimplemented query in control(%d).", i_query);
1242 return VLC_EGENERIC;
1243
1244 }
1245 return VLC_SUCCESS;
1246 }
1247
1248 /*****************************************************************************
1249 * AccessRead: access callback
1250 ******************************************************************************/
1251 static block_t *AccessRead( access_t * p_access )
1252 {
1253 demux_sys_t *p_sys = (demux_sys_t *)p_access->p_sys;
1254
1255 struct pollfd fd;
1256 fd.fd = p_sys->i_fd;
1257 fd.events = POLLIN|POLLPRI;
1258 fd.revents = 0;
1259
1260 /* Wait for data */
1261 if( poll( &fd, 1, 500 ) ) /* Timeout after 0.5 seconds since I don't know if pf_demux can be blocking. */
1262 {
1263 if( fd.revents & (POLLIN|POLLPRI) )
1264 {
1265 return GrabVideo( VLC_OBJECT(p_access), p_sys );
1266 }
1267 }
1268
1269 return NULL;
1270 }
1271
1272 static ssize_t AccessReadStream( access_t * p_access, uint8_t * p_buffer, size_t i_len )
1273 {
1274 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
1275 struct pollfd ufd;
1276 int i_ret;
1277
1278 ufd.fd = p_sys->i_fd;
1279 ufd.events = POLLIN;
1280
1281 if( p_access->info.b_eof )
1282 return 0;
1283
1284 do
1285 {
1286 if( !vlc_object_alive (p_access) )
1287 return 0;
1288
1289 ufd.revents = 0;
1290 }
1291 while( ( i_ret = poll( &ufd, 1, 500 ) ) == 0 );
1292
1293 if( i_ret < 0 )
1294 {
1295 msg_Err( p_access, "Polling error (%m)." );
1296 return -1;
1297 }
1298
1299 i_ret = v4l2_read( p_sys->i_fd, p_buffer, i_len );
1300 if( i_ret == 0 )
1301 {
1302 p_access->info.b_eof = true;
1303 }
1304 else if( i_ret > 0 )
1305 {
1306 p_access->info.i_pos += i_ret;
1307 }
1308
1309 return i_ret;
1310 }
1311
1312 /*****************************************************************************
1313 * Demux: Processes the audio or video frame
1314 *****************************************************************************/
1315 static int Demux( demux_t *p_demux )
1316 {
1317 demux_sys_t *p_sys = p_demux->p_sys;
1318
1319 struct pollfd fd;
1320 fd.fd = p_sys->i_fd;
1321 fd.events = POLLIN|POLLPRI;
1322 fd.revents = 0;
1323
1324 /* Wait for data */
1325 if( poll( &fd, 1, 500 ) ) /* Timeout after 0.5 seconds since I don't know if pf_demux can be blocking. */
1326 {
1327 if( fd.revents & (POLLIN|POLLPRI) )
1328 {
1329 block_t *p_block = GrabVideo( VLC_OBJECT(p_demux), p_sys );
1330 if( p_block )
1331 {
1332 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
1333 es_out_Send( p_demux->out, p_sys->p_es, p_block );
1334 }
1335 }
1336 }
1337
1338 return 1;
1339 }
1340
1341 /*****************************************************************************
1342 * GrabVideo: Grab a video frame
1343 *****************************************************************************/
1344 static block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys )
1345 {
1346 block_t *p_block = NULL;
1347 struct v4l2_buffer buf;
1348 ssize_t i_ret;
1349
1350 if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
1351 {
1352 mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
1353
1354 /* Did we wait long enough ? (frame rate reduction) */
1355 if( p_sys->i_video_pts + i_dur > mdate() )
1356 return NULL;
1357 }
1358
1359 /* Grab Video Frame */
1360 switch( p_sys->io )
1361 {
1362 case IO_METHOD_READ:
1363 i_ret = v4l2_read( p_sys->i_fd, p_sys->p_buffers[0].start, p_sys->p_buffers[0].length );
1364 if( i_ret == -1 )
1365 {
1366 switch( errno )
1367 {
1368 case EAGAIN:
1369 return NULL;
1370 case EIO:
1371 /* Could ignore EIO, see spec. */
1372 /* fall through */
1373 default:
1374 msg_Err( p_demux, "Failed to read frame" );
1375 return 0;
1376 }
1377 }
1378
1379 p_block = ProcessVideoFrame( p_demux, (uint8_t*)p_sys->p_buffers[0].start, i_ret );
1380 if( !p_block )
1381 return NULL;
1382
1383 break;
1384
1385 case IO_METHOD_MMAP:
1386 memset( &buf, 0, sizeof(buf) );
1387 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1388 buf.memory = V4L2_MEMORY_MMAP;
1389
1390 /* Wait for next frame */
1391 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1392 {
1393 switch( errno )
1394 {
1395 case EAGAIN:
1396 return NULL;
1397 case EIO:
1398 /* Could ignore EIO, see spec. */
1399 /* fall through */
1400 default:
1401 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1402 return NULL;
1403 }
1404 }
1405
1406 if( buf.index >= p_sys->i_nbuffers ) {
1407 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1408 return NULL;
1409 }
1410
1411 p_block = ProcessVideoFrame( p_demux, p_sys->p_buffers[buf.index].start, buf.bytesused );
1412 if( !p_block )
1413 return NULL;
1414
1415 /* Unlock */
1416 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1417 {
1418 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1419 block_Release( p_block );
1420 return NULL;
1421 }
1422
1423 break;
1424
1425 case IO_METHOD_USERPTR:
1426 memset( &buf, 0, sizeof(buf) );
1427 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1428 buf.memory = V4L2_MEMORY_USERPTR;
1429
1430 /* Wait for next frame */
1431 if (v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ) < 0 )
1432 {
1433 switch( errno )
1434 {
1435 case EAGAIN:
1436 return NULL;
1437 case EIO:
1438 /* Could ignore EIO, see spec. */
1439 /* fall through */
1440 default:
1441 msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
1442 return NULL;
1443 }
1444 }
1445
1446 /* Find frame? */
1447 unsigned int i;
1448 for( i = 0; i < p_sys->i_nbuffers; i++ )
1449 {
1450 if( buf.m.userptr == (unsigned long)p_sys->p_buffers[i].start &&
1451 buf.length == p_sys->p_buffers[i].length ) break;
1452 }
1453
1454 if( i >= p_sys->i_nbuffers )
1455 {
1456 msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
1457 return NULL;
1458 }
1459
1460 p_block = ProcessVideoFrame( p_demux, (uint8_t*)buf.m.userptr, buf.bytesused );
1461 if( !p_block )
1462 return NULL;
1463
1464 /* Unlock */
1465 if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
1466 {
1467 msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
1468 block_Release( p_block );
1469 return NULL;
1470 }
1471
1472 break;
1473
1474 default:
1475 break;
1476 }
1477
1478 /* Timestamp */
1479 p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();
1480 p_block->i_flags |= p_sys->i_block_flags;
1481
1482 return p_block;
1483 }
1484
1485 /*****************************************************************************
1486 * ProcessVideoFrame: Helper function to take a buffer and copy it into
1487 * a new block
1488 *****************************************************************************/
1489 static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t i_size )
1490 {
1491 block_t *p_block;
1492
1493 if( !p_frame ) return NULL;
1494
1495 /* New block */
1496 if( !( p_block = block_New( p_demux, i_size ) ) )
1497 {
1498 msg_Warn( p_demux, "Cannot get new block" );
1499 return NULL;
1500 }
1501
1502 /* Copy frame */
1503 memcpy( p_block->p_buffer, p_frame, i_size );
1504
1505 return p_block;
1506 }
1507
1508 /*****************************************************************************
1509 * Helper function to initalise video IO using the Read method
1510 *****************************************************************************/
1511 static int InitRead( vlc_object_t *p_demux, demux_sys_t *p_sys, unsigned int i_buffer_size )
1512 {
1513 (void)p_demux;
1514
1515 p_sys->p_buffers = calloc( 1, sizeof( *p_sys->p_buffers ) );
1516 if( !p_sys->p_buffers )
1517 return VLC_EGENERIC;
1518
1519 p_sys->p_buffers[0].length = i_buffer_size;
1520 p_sys->p_buffers[0].start = malloc( i_buffer_size );
1521 if( !p_sys->p_buffers[0].start )
1522 return VLC_ENOMEM;
1523
1524 return VLC_SUCCESS;
1525 }
1526
1527 /*****************************************************************************
1528 * Helper function to initalise video IO using the mmap method
1529 *****************************************************************************/
1530 static int InitMmap( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd )
1531 {
1532 struct v4l2_requestbuffers req;
1533
1534 memset( &req, 0, sizeof(req) );
1535 req.count = 4;
1536 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1537 req.memory = V4L2_MEMORY_MMAP;
1538
1539 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1540 {
1541 msg_Err( p_demux, "device does not support mmap i/o" );
1542 goto open_failed;
1543 }
1544
1545 if( req.count < 2 )
1546 {
1547 msg_Err( p_demux, "Insufficient buffer memory" );
1548 goto open_failed;
1549 }
1550
1551 p_sys->p_buffers = calloc( req.count, sizeof( *p_sys->p_buffers ) );
1552 if( !p_sys->p_buffers )
1553 goto open_failed;
1554
1555 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < req.count; ++p_sys->i_nbuffers )
1556 {
1557 struct v4l2_buffer buf;
1558
1559 memset( &buf, 0, sizeof(buf) );
1560 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1561 buf.memory = V4L2_MEMORY_MMAP;
1562 buf.index = p_sys->i_nbuffers;
1563
1564 if( v4l2_ioctl( i_fd, VIDIOC_QUERYBUF, &buf ) < 0 )
1565 {
1566 msg_Err( p_demux, "VIDIOC_QUERYBUF" );
1567 goto open_failed;
1568 }
1569
1570 p_sys->p_buffers[p_sys->i_nbuffers].length = buf.length;
1571 p_sys->p_buffers[p_sys->i_nbuffers].start =
1572 v4l2_mmap( NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, buf.m.offset );
1573
1574 if( p_sys->p_buffers[p_sys->i_nbuffers].start == MAP_FAILED )
1575 {
1576 msg_Err( p_demux, "mmap failed (%m)" );
1577 goto open_failed;
1578 }
1579 }
1580
1581 return VLC_SUCCESS;
1582
1583 open_failed:
1584 return VLC_EGENERIC;
1585
1586 }
1587
1588 /*****************************************************************************
1589 * Helper function to initalise video IO using the userbuf method
1590 *****************************************************************************/
1591 static int InitUserP( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd, unsigned int i_buffer_size )
1592 {
1593 struct v4l2_requestbuffers req;
1594 unsigned int i_page_size;
1595
1596 i_page_size = sysconf(_SC_PAGESIZE);
1597 i_buffer_size = ( i_buffer_size + i_page_size - 1 ) & ~( i_page_size - 1);
1598
1599 memset( &req, 0, sizeof(req) );
1600 req.count = 4;
1601 req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1602 req.memory = V4L2_MEMORY_USERPTR;
1603
1604 if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
1605 {
1606 msg_Err( p_demux, "device does not support user pointer i/o" );
1607 return VLC_EGENERIC;
1608 }
1609
1610 p_sys->p_buffers = calloc( 4, sizeof( *p_sys->p_buffers ) );
1611 if( !p_sys->p_buffers )
1612 goto open_failed;
1613
1614 for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < 4; ++p_sys->i_nbuffers )
1615 {
1616 p_sys->p_buffers[p_sys->i_nbuffers].length = i_buffer_size;
1617 if( posix_memalign( &p_sys->p_buffers[p_sys->i_nbuffers].start,
1618 /* boundary */ i_page_size, i_buffer_size ) )
1619 goto open_failed;
1620 }
1621
1622 return VLC_SUCCESS;
1623
1624 open_failed:
1625 free( p_sys->p_buffers );
1626 return VLC_EGENERIC;
1627
1628 }
1629
1630 /*****************************************************************************
1631 * IsPixelFormatSupported: returns true if the specified V4L2 pixel format is
1632 * in the array of supported formats returned by the driver
1633 *****************************************************************************/
1634 static bool IsPixelFormatSupported( demux_t *p_demux, unsigned int i_pixelformat )
1635 {
1636 demux_sys_t *p_sys = p_demux->p_sys;
1637
1638 for( int i_index = 0; i_index < p_sys->i_codec; i_index++ )
1639 {
1640 if( p_sys->p_codecs[i_index].pixelformat == i_pixelformat )
1641 return true;
1642 }
1643
1644 return false;
1645 }
1646
1647 static float GetMaxFrameRate( demux_t *p_demux, int i_fd,
1648 uint32_t i_pixel_format,
1649 uint32_t i_width, uint32_t i_height )
1650 {
1651 (void)p_demux;
1652 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
1653 #ifdef HAVE_LIBV4L2
1654 demux_sys_t *p_sys = p_demux->p_sys;
1655 #endif
1656 /* This is new in Linux 2.6.19 */
1657 struct v4l2_frmivalenum frmival;
1658 memset( &frmival, 0, sizeof(frmival) );
1659 frmival.pixel_format = i_pixel_format;
1660 frmival.width = i_width;
1661 frmival.height = i_height;
1662 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
1663 {
1664 switch( frmival.type )
1665 {
1666 case V4L2_FRMIVAL_TYPE_DISCRETE:
1667 {
1668 float f_fps_max = -1;
1669 do
1670 {
1671 float f_fps = (float)frmival.discrete.denominator
1672 / (float)frmival.discrete.numerator;
1673 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1674 frmival.index++;
1675 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS,
1676 &frmival ) >= 0 );
1677 return f_fps_max;
1678 }
1679 case V4L2_FRMSIZE_TYPE_STEPWISE:
1680 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
1681 return __MAX( (float)frmival.stepwise.max.denominator
1682 / (float)frmival.stepwise.max.numerator,
1683 (float)frmival.stepwise.min.denominator
1684 / (float)frmival.stepwise.min.numerator );
1685 }
1686 }
1687 #endif
1688 return -1.;
1689 }
1690
1691 static float GetAbsoluteMaxFrameRate( demux_t *p_demux, int i_fd,
1692 uint32_t i_pixel_format )
1693 {
1694 float f_fps_max = -1.;
1695 #ifdef VIDIOC_ENUM_FRAMESIZES
1696 #ifdef HAVE_LIBV4L2
1697 demux_sys_t *p_sys = p_demux->p_sys;
1698 #endif
1699 /* This is new in Linux 2.6.19 */
1700 struct v4l2_frmsizeenum frmsize;
1701 memset( &frmsize, 0, sizeof(frmsize) );
1702 frmsize.pixel_format = i_pixel_format;
1703 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1704 {
1705 switch( frmsize.type )
1706 {
1707 case V4L2_FRMSIZE_TYPE_DISCRETE:
1708 do
1709 {
1710 frmsize.index++;
1711 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1712 i_pixel_format,
1713 frmsize.discrete.width,
1714 frmsize.discrete.height );
1715 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1716 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1717 &frmsize ) >= 0 );
1718 break;
1719 case V4L2_FRMSIZE_TYPE_STEPWISE:
1720 {
1721 uint32_t i_width = frmsize.stepwise.min_width;
1722 uint32_t i_height = frmsize.stepwise.min_height;
1723 for( ;
1724 i_width <= frmsize.stepwise.max_width &&
1725 i_height <= frmsize.stepwise.max_width;
1726 i_width += frmsize.stepwise.step_width,
1727 i_height += frmsize.stepwise.step_height )
1728 {
1729 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1730 i_pixel_format,
1731 i_width, i_height );
1732 if( f_fps > f_fps_max ) f_fps_max = f_fps;
1733 }
1734 break;
1735 }
1736 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1737 /* FIXME */
1738 msg_Err( p_demux, "GetAbsoluteMaxFrameRate implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1739 f_fps_max = GetMaxFrameRate( p_demux, i_fd,
1740 i_pixel_format,
1741 frmsize.stepwise.max_width,
1742 frmsize.stepwise.max_height );
1743 break;
1744 }
1745 }
1746 #endif
1747 return f_fps_max;
1748 }
1749
1750 static void GetMaxDimensions( demux_t *p_demux, int i_fd,
1751 uint32_t i_pixel_format, float f_fps_min,
1752 uint32_t *pi_width, uint32_t *pi_height )
1753 {
1754 *pi_width = 0;
1755 *pi_height = 0;
1756 #ifdef VIDIOC_ENUM_FRAMESIZES
1757 #ifdef HAVE_LIBV4L2
1758 demux_sys_t *p_sys = p_demux->p_sys;
1759 #endif
1760 /* This is new in Linux 2.6.19 */
1761 struct v4l2_frmsizeenum frmsize;
1762 memset( &frmsize, 0, sizeof(frmsize) );
1763 frmsize.pixel_format = i_pixel_format;
1764 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
1765 {
1766 switch( frmsize.type )
1767 {
1768 case V4L2_FRMSIZE_TYPE_DISCRETE:
1769 do
1770 {
1771 frmsize.index++;
1772 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1773 i_pixel_format,
1774 frmsize.discrete.width,
1775 frmsize.discrete.height );
1776 if( f_fps >= f_fps_min &&
1777 frmsize.discrete.width > *pi_width )
1778 {
1779 *pi_width = frmsize.discrete.width;
1780 *pi_height = frmsize.discrete.height;
1781 }
1782 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
1783 &frmsize ) >= 0 );
1784 break;
1785 case V4L2_FRMSIZE_TYPE_STEPWISE:
1786 {
1787 uint32_t i_width = frmsize.stepwise.min_width;
1788 uint32_t i_height = frmsize.stepwise.min_height;
1789 for( ;
1790 i_width <= frmsize.stepwise.max_width &&
1791 i_height <= frmsize.stepwise.max_width;
1792 i_width += frmsize.stepwise.step_width,
1793 i_height += frmsize.stepwise.step_height )
1794 {
1795 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1796 i_pixel_format,
1797 i_width, i_height );
1798 if( f_fps >= f_fps_min && i_width > *pi_width )
1799 {
1800 *pi_width = i_width;
1801 *pi_height = i_height;
1802 }
1803 }
1804 break;
1805 }
1806 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1807 /* FIXME */
1808 msg_Err( p_demux, "GetMaxDimension implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
1809 float f_fps = GetMaxFrameRate( p_demux, i_fd,
1810 i_pixel_format,
1811 frmsize.stepwise.max_width,
1812 frmsize.stepwise.max_height );
1813 if( f_fps >= f_fps_min &&
1814 frmsize.stepwise.max_width > *pi_width )
1815 {
1816 *pi_width = frmsize.stepwise.max_width;
1817 *pi_height = frmsize.stepwise.max_height;
1818 }
1819 break;
1820 }
1821 }
1822 #endif
1823 }
1824
1825 /*****************************************************************************
1826 * OpenVideoDev: open and set up the video device and probe for capabilities
1827 *****************************************************************************/
1828 static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
1829 {
1830 int i_fd;
1831 struct v4l2_cropcap cropcap;
1832 struct v4l2_crop crop;
1833 struct v4l2_format fmt;
1834 unsigned int i_min;
1835 enum v4l2_buf_type buf_type;
1836 const char *psz_device = p_sys->psz_device;
1837 es_format_t es_fmt;
1838
1839 if( ( i_fd = v4l2_open( psz_device, O_RDWR ) ) < 0 )
1840 {
1841 msg_Err( p_obj, "cannot open device (%m)" );
1842 goto open_failed;
1843 }
1844
1845 #ifdef HAVE_LIBV4L2
1846 /* Note the v4l2_xxx functions are designed so that if they get passed an
1847 unknown fd, the will behave exactly as their regular xxx counterparts,
1848 so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
1849 custom cam format to normal formats conversion). Chances are big we will
1850 still fail then though, as normally v4l2_fd_open only fails if the
1851 device is not a v4l2 device. */
1852 if( p_sys->b_libv4l2 )
1853 {
1854 int libv4l2_fd;
1855 libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
1856 if( libv4l2_fd != -1 )
1857 i_fd = libv4l2_fd;
1858 }
1859 #endif
1860
1861 /* Tune the tuner */
1862 if( p_sys->i_frequency >= 0 )
1863 {
1864 if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1865 {
1866 msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1867 goto open_failed;
1868 }
1869 struct v4l2_frequency frequency;
1870 memset( &frequency, 0, sizeof( frequency ) );
1871 frequency.tuner = p_sys->i_cur_tuner;
1872 frequency.type = p_sys->p_tuners[p_sys->i_cur_tuner].type;
1873 frequency.frequency = p_sys->i_frequency / 62.5;
1874 if( v4l2_ioctl( i_fd, VIDIOC_S_FREQUENCY, &frequency ) < 0 )
1875 {
1876 msg_Err( p_obj, "cannot set tuner frequency (%m)" );
1877 goto open_failed;
1878 }
1879 msg_Dbg( p_obj, "Tuner frequency set" );
1880 }
1881
1882 /* Set the tuner's audio mode */
1883 if( p_sys->i_audio_mode >= 0 )
1884 {
1885 if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
1886 {
1887 msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
1888 goto open_failed;
1889 }
1890 struct v4l2_tuner tuner;
1891 memset( &tuner, 0, sizeof( tuner ) );
1892 tuner.index = p_sys->i_cur_tuner;
1893 tuner.audmode = p_sys->i_audio_mode;
1894 if( v4l2_ioctl( i_fd, VIDIOC_S_TUNER, &tuner ) < 0 )
1895 {
1896 msg_Err( p_obj, "cannot set tuner audio mode (%m)" );
1897 goto open_failed;
1898 }
1899 msg_Dbg( p_obj, "Tuner audio mode set" );
1900 }
1901
1902 /* Select standard */
1903
1904 if( p_sys->i_selected_standard_id != V4L2_STD_UNKNOWN )
1905 {
1906 if( v4l2_ioctl( i_fd, VIDIOC_S_STD, &p_sys->i_selected_standard_id ) < 0 )
1907 {
1908 msg_Err( p_obj, "cannot set standard (%m)" );
1909 goto open_failed;
1910 }
1911 if( v4l2_ioctl( i_fd, VIDIOC_G_STD, &p_sys->i_selected_standard_id ) < 0 )
1912 {
1913 msg_Err( p_obj, "cannot get standard (%m). This should never happen!" );
1914 goto open_failed;
1915 }
1916 msg_Dbg( p_obj, "Set standard to (0x%"PRIx64"):", p_sys->i_selected_standard_id );
1917 int i_standard;
1918 for( i_standard = 0; i_standard<p_sys->i_standard; i_standard++)
1919 {
1920 if( p_sys->p_standards[i_standard].id & p_sys->i_selected_standard_id )
1921 {
1922 msg_Dbg( p_obj, " %s",
1923 p_sys->p_standards[i_standard].name );
1924 }
1925 }
1926 }
1927
1928 /* Select input */
1929
1930 if( p_sys->i_selected_input >= p_sys->i_input )
1931 {
1932 msg_Warn( p_obj, "invalid input. Using the default one" );
1933 p_sys->i_selected_input = 0;
1934 }
1935
1936 if( v4l2_ioctl( i_fd, VIDIOC_S_INPUT, &p_sys->i_selected_input ) < 0 )
1937 {
1938 msg_Err( p_obj, "cannot set input (%m)" );
1939 goto open_failed;
1940 }
1941
1942 /* Set audio input */
1943
1944 if( p_sys->i_audio > 0 )
1945 {
1946 if( p_sys->i_selected_audio_input < 0
1947 || p_sys->i_selected_audio_input >= p_sys->i_audio )
1948 {
1949 msg_Warn( p_obj, "invalid audio input. Using the default one" );
1950 p_sys->i_selected_audio_input = 0;
1951 }
1952
1953 if( v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_selected_audio_input] ) < 0 )
1954 {
1955 msg_Err( p_obj, "cannot set audio input (%m)" );
1956 goto open_failed;
1957 }
1958 msg_Dbg( p_obj, "Audio input set to %d", p_sys->i_selected_audio_input );
1959 }
1960
1961
1962 /* TODO: Move the resolution stuff up here */
1963 /* if MPEG encoder card, no need to do anything else after this */
1964 ControlList( p_obj, p_sys, i_fd,
1965 var_GetBool( p_obj, "v4l2-controls-reset" ), b_demux );
1966 SetAvailControlsByString( p_obj, p_sys, i_fd );
1967
1968 /* Verify device support for the various IO methods */
1969 switch( p_sys->io )
1970 {
1971 case IO_METHOD_READ:
1972 if( !(p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE) )
1973 {
1974 msg_Err( p_obj, "device does not support read i/o" );
1975 goto open_failed;
1976 }
1977 msg_Dbg( p_obj, "using read i/o" );
1978 break;
1979
1980 case IO_METHOD_MMAP:
1981 case IO_METHOD_USERPTR:
1982 if( !(p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING) )
1983 {
1984 msg_Err( p_obj, "device does not support streaming i/o" );
1985 goto open_failed;
1986 }
1987 if( p_sys->io == IO_METHOD_MMAP )
1988 msg_Dbg( p_obj, "using streaming i/o (mmap)" );
1989 else
1990 msg_Dbg( p_obj, "using streaming i/o (userptr)" );
1991 break;
1992
1993 default:
1994 msg_Err( p_obj, "io method not supported" );
1995 goto open_failed;
1996 }
1997
1998 /* Reset Cropping */
1999 memset( &cropcap, 0, sizeof(cropcap) );
2000 cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2001 if( v4l2_ioctl( i_fd, VIDIOC_CROPCAP, &cropcap ) >= 0 )
2002 {
2003 crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2004 crop.c = cropcap.defrect; /* reset to default */
2005 if( crop.c.width > 0 && crop.c.height > 0 ) /* Fix for fm tuners */
2006 {
2007 if( v4l2_ioctl( i_fd, VIDIOC_S_CROP, &crop ) < 0 )
2008 {
2009 switch( errno )
2010 {
2011 case EINVAL:
2012 /* Cropping not supported. */
2013 break;
2014 default:
2015 /* Errors ignored. */
2016 break;
2017 }
2018 }
2019 }
2020 }
2021
2022 /* Try and find default resolution if not specified */
2023 memset( &fmt, 0, sizeof(fmt) );
2024 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2025
2026 if( p_sys->i_width <= 0 || p_sys->i_height <= 0 )
2027 {
2028 /* Use current width and height settings */
2029 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 )
2030 {
2031 msg_Err( p_obj, "Cannot get default width and height." );
2032 goto open_failed;
2033 }
2034
2035 msg_Dbg( p_obj, "found default width and height of %ux%u",
2036 fmt.fmt.pix.width, fmt.fmt.pix.height );
2037
2038 if( p_sys->i_width < 0 || p_sys->i_height < 0 )
2039 {
2040 msg_Dbg( p_obj, "will try to find optimal width and height." );
2041 }
2042 }
2043 else
2044 {
2045 /* Use user specified width and height */
2046 msg_Dbg( p_obj, "trying specified size %dx%d", p_sys->i_width, p_sys->i_height );
2047 fmt.fmt.pix.width = p_sys->i_width;
2048 fmt.fmt.pix.height = p_sys->i_height;
2049 }
2050
2051 fmt.fmt.pix.field = V4L2_FIELD_NONE;
2052
2053 if (b_demux)
2054 {
2055 demux_t *p_demux = (demux_t *) p_obj;
2056
2057 /* Test and set Chroma */
2058 fmt.fmt.pix.pixelformat = 0;
2059 if( p_sys->psz_requested_chroma && *p_sys->psz_requested_chroma )
2060 {
2061 /* User specified chroma */
2062 const vlc_fourcc_t i_requested_fourcc =
2063 vlc_fourcc_GetCodecFromString( VIDEO_ES, p_sys->psz_requested_chroma );
2064
2065 for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
2066 {
2067 if( v4l2chroma_to_fourcc[i].i_fourcc == i_requested_fourcc )
2068 {
2069 fmt.fmt.pix.pixelformat = v4l2chroma_to_fourcc[i].i_v4l2;
2070 break;
2071 }
2072 }
2073 /* Try and set user chroma */
2074 bool b_error = !IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat );
2075 if( !b_error && fmt.fmt.pix.pixelformat )
2076 {
2077 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
2078 {
2079 fmt.fmt.pix.field = V4L2_FIELD_ANY;
2080 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
2081 {
2082 fmt.fmt.pix.field = V4L2_FIELD_NONE;
2083 b_error = true;
2084 }
2085 }
2086 }
2087 if( b_error )
2088 {
2089 msg_Warn( p_demux, "Driver is unable to use specified chroma %s. Trying defaults.", p_sys->psz_requested_chroma );
2090 fmt.fmt.pix.pixelformat = 0;
2091 }
2092 }
2093
2094 /* If no user specified chroma, find best */
2095 /* This also decides if MPEG encoder card or not */
2096 if( !fmt.fmt.pix.pixelformat )
2097 {
2098 unsigned int i;
2099 for( i = 0; i < ARRAY_SIZE( p_chroma_fallbacks ); i++ )
2100 {
2101 fmt.fmt.pix.pixelformat = p_chroma_fallbacks[i];
2102 if( IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat ) )
2103 {
2104 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
2105 break;
2106 fmt.fmt.pix.field = V4L2_FIELD_ANY;
2107 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
2108 break;
2109 fmt.fmt.pix.field = V4L2_FIELD_NONE;
2110 }
2111 }
2112 if( i == ARRAY_SIZE( p_chroma_fallbacks ) )
2113 {
2114 msg_Warn( p_demux, "Could not select any of the default chromas; attempting to open as MPEG encoder card (access)" );
2115 goto open_failed;
2116 }
2117 }
2118
2119 if( p_sys->i_width < 0 || p_sys->i_height < 0 )
2120 {
2121 if( p_sys->f_fps <= 0 )
2122 {
2123 p_sys->f_fps = GetAbsoluteMaxFrameRate( p_demux, i_fd,
2124 fmt.fmt.pix.pixelformat );
2125 msg_Dbg( p_demux, "Found maximum framerate of %f", p_sys->f_fps );
2126 }
2127 uint32_t i_width, i_height;
2128 GetMaxDimensions( p_demux, i_fd,
2129 fmt.fmt.pix.pixelformat, p_sys->f_fps,
2130 &i_width, &i_height );
2131 if( i_width || i_height )
2132 {
2133 msg_Dbg( p_demux, "Found optimal dimensions for framerate %f "
2134 "of %ux%u", p_sys->f_fps, i_width, i_height );
2135 fmt.fmt.pix.width = i_width;
2136 fmt.fmt.pix.height = i_height;
2137 if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
2138 {
2139 msg_Err( p_obj, "Cannot set size to optimal dimensions "
2140 "%ux%u", i_width, i_height );
2141 goto open_failed;
2142 }
2143 }
2144 else
2145 {
2146 msg_Warn( p_obj, "Could not find optimal width and height, "
2147 "falling back to driver default." );
2148 }
2149 }
2150 }
2151
2152 p_sys->i_width = fmt.fmt.pix.width;
2153 p_sys->i_height = fmt.fmt.pix.height;
2154
2155 if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 ) {;}
2156 /* Print extra info */
2157 msg_Dbg( p_obj, "Driver requires at most %d bytes to store a complete image", fmt.fmt.pix.sizeimage );
2158 /* Check interlacing */
2159 switch( fmt.fmt.pix.field )
2160 {
2161 case V4L2_FIELD_NONE:
2162 msg_Dbg( p_obj, "Interlacing setting: progressive" );
2163 break;
2164 case V4L2_FIELD_TOP:
2165 msg_Dbg( p_obj, "Interlacing setting: top field only" );
2166 break;
2167 case V4L2_FIELD_BOTTOM:
2168 msg_Dbg( p_obj, "Interlacing setting: bottom field only" );
2169 break;
2170 case V4L2_FIELD_INTERLACED:
2171 msg_Dbg( p_obj, "Interlacing setting: interleaved (bottom top if M/NTSC, top bottom otherwise)" );
2172 if( p_sys->i_selected_standard_id == V4L2_STD_NTSC )
2173 p_sys->i_block_flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST;
2174 else
2175 p_sys->i_block_flags = BLOCK_FLAG_TOP_FIELD_FIRST;
2176 break;
2177 case V4L2_FIELD_SEQ_TB:
2178 msg_Dbg( p_obj, "Interlacing setting: sequential top bottom (TODO)" );
2179 break;
2180 case V4L2_FIELD_SEQ_BT:
2181 msg_Dbg( p_obj, "Interlacing setting: sequential bottom top (TODO)" );
2182 break;
2183 case V4L2_FIELD_ALTERNATE:
2184 msg_Dbg( p_obj, "Interlacing setting: alternate fields (TODO)" );
2185 p_sys->i_height = p_sys->i_height * 2;
2186 break;
2187 case V4L2_FIELD_INTERLACED_TB:
2188 msg_Dbg( p_obj, "Interlacing setting: interleaved top bottom" );
2189 p_sys->i_block_flags = BLOCK_FLAG_TOP_FIELD_FIRST;
2190 break;
2191 case V4L2_FIELD_INTERLACED_BT:
2192 msg_Dbg( p_obj, "Interlacing setting: interleaved bottom top" );
2193 p_sys->i_block_flags = BLOCK_FLAG_BOTTOM_FIELD_FIRST;
2194 break;
2195 default:
2196 msg_Warn( p_obj, "Interlacing setting: unknown type (%d)",
2197 fmt.fmt.pix.field );
2198 break;
2199 }
2200
2201 /* Look up final fourcc */
2202 p_sys->i_fourcc = 0;
2203 for( int i = 0; v4l2chroma_to_fourcc[i].i_fourcc != 0; i++ )
2204 {
2205 if( v4l2chroma_to_fourcc[i].i_v4l2 == fmt.fmt.pix.pixelformat )
2206 {
2207 p_sys->i_fourcc = v4l2chroma_to_fourcc[i].i_fourcc;
2208 es_format_Init( &es_fmt, VIDEO_ES, p_sys->i_fourcc );
2209 es_fmt.video.i_rmask = v4l2chroma_to_fourcc[i].i_rmask;
2210 es_fmt.video.i_gmask = v4l2chroma_to_fourcc[i].i_gmask;
2211 es_fmt.video.i_bmask = v4l2chroma_to_fourcc[i].i_bmask;
2212 break;
2213 }
2214 }
2215
2216 /* Buggy driver paranoia */
2217 i_min = fmt.fmt.pix.width * 2;
2218 if( fmt.fmt.pix.bytesperline < i_min )
2219 fmt.fmt.pix.bytesperline = i_min;
2220 i_min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
2221 if( fmt.fmt.pix.sizeimage < i_min )
2222 fmt.fmt.pix.sizeimage = i_min;
2223
2224 #ifdef VIDIOC_ENUM_FRAMEINTERVALS
2225 /* This is new in Linux 2.6.19 */
2226 /* List supported frame rates */
2227 struct v4l2_frmivalenum frmival;
2228 memset( &frmival, 0, sizeof(frmival) );
2229 frmival.pixel_format = fmt.fmt.pix.pixelformat;
2230 frmival.width = p_sys->i_width;
2231 frmival.height = p_sys->i_height;
2232 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
2233 {
2234 char psz_fourcc[5];
2235 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2236 vlc_fourcc_to_char( p_sys->i_fourcc, &psz_fourcc );
2237 msg_Dbg( p_obj, "supported frame intervals for %4.4s, %dx%d:",
2238 psz_fourcc, frmival.width, frmival.height );
2239 switch( frmival.type )
2240 {
2241 case V4L2_FRMIVAL_TYPE_DISCRETE:
2242 do
2243 {
2244 msg_Dbg( p_obj, " supported frame interval: %d/%d",
2245 frmival.discrete.numerator,
2246 frmival.discrete.denominator );
2247 frmival.index++;
2248 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 );
2249 break;
2250 case V4L2_FRMIVAL_TYPE_STEPWISE:
2251 msg_Dbg( p_obj, " supported frame intervals: %d/%d to "
2252 "%d/%d using %d/%d increments",
2253 frmival.stepwise.min.numerator,
2254 frmival.stepwise.min.denominator,
2255 frmival.stepwise.max.numerator,
2256 frmival.stepwise.max.denominator,
2257 frmival.stepwise.step.numerator,
2258 frmival.stepwise.step.denominator );
2259 break;
2260 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
2261 msg_Dbg( p_obj, " supported frame intervals: %d/%d to %d/%d",
2262 frmival.stepwise.min.numerator,
2263 frmival.stepwise.min.denominator,
2264 frmival.stepwise.max.numerator,
2265 frmival.stepwise.max.denominator );
2266 break;
2267 }
2268 }
2269 #endif
2270
2271
2272 /* Init IO method */
2273 switch( p_sys->io )
2274 {
2275 case IO_METHOD_READ:
2276 if( b_demux )
2277 if( InitRead( p_obj, p_sys, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2278 break;
2279
2280 case IO_METHOD_MMAP:
2281 if( InitMmap( p_obj, p_sys, i_fd ) != VLC_SUCCESS ) goto open_failed;
2282 break;
2283
2284 case IO_METHOD_USERPTR:
2285 if( InitUserP( p_obj, p_sys, i_fd, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
2286 break;
2287
2288 default:
2289 goto open_failed;
2290 break;
2291 }
2292
2293 if( b_demux )
2294 {
2295 /* Add */
2296 es_fmt.video.i_width = p_sys->i_width;
2297 es_fmt.video.i_height = p_sys->i_height;
2298
2299 /* Get aspect-ratio */
2300 es_fmt.video.i_sar_num = p_sys->i_aspect * es_fmt.video.i_height;
2301 es_fmt.video.i_sar_den = VOUT_ASPECT_FACTOR * es_fmt.video.i_width;
2302
2303 demux_t *p_demux = (demux_t *) p_obj;
2304 msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
2305 (char*)&es_fmt.i_codec, es_fmt.video.i_width, es_fmt.video.i_height );
2306 p_sys->p_es = es_out_Add( p_demux->out, &es_fmt );
2307 }
2308
2309 /* Start Capture */
2310
2311 switch( p_sys->io )
2312 {
2313 case IO_METHOD_READ:
2314 /* Nothing to do */
2315 break;
2316
2317 case IO_METHOD_MMAP:
2318 for (unsigned int i = 0; i < p_sys->i_nbuffers; ++i)
2319 {
2320 struct v4l2_buffer buf;
2321
2322 memset( &buf, 0, sizeof(buf) );
2323 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2324 buf.memory = V4L2_MEMORY_MMAP;
2325 buf.index = i;
2326
2327 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2328 {
2329 msg_Err( p_obj, "VIDIOC_QBUF failed" );
2330 goto open_failed;
2331 }
2332 }
2333
2334 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2335 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2336 {
2337 msg_Err( p_obj, "VIDIOC_STREAMON failed" );
2338 goto open_failed;
2339 }
2340
2341 break;
2342
2343 case IO_METHOD_USERPTR:
2344 for( unsigned int i = 0; i < p_sys->i_nbuffers; ++i )
2345 {
2346 struct v4l2_buffer buf;
2347
2348 memset( &buf, 0, sizeof(buf) );
2349 buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2350 buf.memory = V4L2_MEMORY_USERPTR;
2351 buf.index = i;
2352 buf.m.userptr = (unsigned long)p_sys->p_buffers[i].start;
2353 buf.length = p_sys->p_buffers[i].length;
2354
2355 if( v4l2_ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
2356 {
2357 msg_Err( p_obj, "VIDIOC_QBUF failed" );
2358 goto open_failed;
2359 }
2360 }
2361
2362 buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2363 if( v4l2_ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 )
2364 {
2365 msg_Err( p_obj, "VIDIOC_STREAMON failed" );
2366 goto open_failed;
2367 }
2368
2369 break;
2370
2371 default:
2372 goto open_failed;
2373 break;
2374 }
2375
2376 /* report fps */
2377 if( p_sys->f_fps >= 0.1 )
2378 {
2379 msg_Dbg( p_obj, "User set fps=%f", p_sys->f_fps );
2380 }
2381
2382 return i_fd;
2383
2384 open_failed:
2385 if( i_fd >= 0 ) v4l2_close( i_fd );
2386 return -1;
2387
2388 }
2389
2390 /*****************************************************************************
2391 * ProbeVideoDev: probe video for capabilities
2392 *****************************************************************************/
2393 static bool ProbeVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys,
2394 const char *psz_device )
2395 {
2396 int i_index;
2397 int i_standard;
2398
2399 int i_fd;
2400
2401 if( ( i_fd = v4l2_open( psz_device, O_RDWR ) ) < 0 )
2402 {
2403 msg_Err( p_obj, "cannot open video device '%s' (%m)", psz_device );
2404 goto open_failed;
2405 }
2406
2407 #ifdef HAVE_LIBV4L2
2408 /* Note the v4l2_xxx functions are designed so that if they get passed an
2409 unknown fd, the will behave exactly as their regular xxx counterparts,
2410 so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
2411 custom cam format to normal formats conversion). Chances are big we will
2412 still fail then though, as normally v4l2_fd_open only fails if the
2413 device is not a v4l2 device. */
2414 if( p_sys->b_libv4l2 )
2415 {
2416 int libv4l2_fd;
2417 libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
2418 if( libv4l2_fd != -1 )
2419 i_fd = libv4l2_fd;
2420 }
2421 #endif
2422
2423 /* Get device capabilites */
2424
2425 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCAP, &p_sys->dev_cap ) < 0 )
2426 {
2427 msg_Err( p_obj, "cannot get video capabilities (%m)" );
2428 goto open_failed;
2429 }
2430
2431 msg_Dbg( p_obj, "V4L2 device: %s using driver: %s (version: %u.%u.%u) on %s",
2432 p_sys->dev_cap.card,
2433 p_sys->dev_cap.driver,
2434 (p_sys->dev_cap.version >> 16) & 0xFF,
2435 (p_sys->dev_cap.version >> 8) & 0xFF,
2436 p_sys->dev_cap.version & 0xFF,
2437 p_sys->dev_cap.bus_info );
2438
2439 msg_Dbg( p_obj, "the device has the capabilities: (%c) Video Capture, "
2440 "(%c) Audio, "
2441 "(%c) Tuner, "
2442 "(%c) Radio",
2443 ( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE ? 'X':' '),
2444 ( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO ? 'X':' '),
2445 ( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER ? 'X':' '),
2446 ( p_sys->dev_cap.capabilities & V4L2_CAP_RADIO ? 'X':' ') );
2447
2448 msg_Dbg( p_obj, "supported I/O methods are: (%c) Read/Write, "
2449 "(%c) Streaming, "
2450 "(%c) Asynchronous",
2451 ( p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE ? 'X':' ' ),
2452 ( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING ? 'X':' ' ),
2453 ( p_sys->dev_cap.capabilities & V4L2_CAP_ASYNCIO ? 'X':' ' ) );
2454
2455 if( p_sys->io == IO_METHOD_AUTO )
2456 {
2457 if( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING )
2458 p_sys->io = IO_METHOD_MMAP;
2459 else if( p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE )
2460 p_sys->io = IO_METHOD_READ;
2461 else
2462 msg_Err( p_obj, "No known I/O method supported" );
2463 }
2464
2465 if( p_sys->dev_cap.capabilities & V4L2_CAP_RDS_CAPTURE )
2466 msg_Dbg( p_obj, "device supports RDS" );
2467
2468 #ifdef V4L2_CAP_HW_FREQ_SEEK
2469 if( p_sys->dev_cap.capabilities & V4L2_CAP_HW_FREQ_SEEK )
2470 msg_Dbg( p_obj, "device supports hardware frequency seeking" );
2471 #endif
2472 if( p_sys->dev_cap.capabilities & V4L2_CAP_VBI_CAPTURE )
2473 msg_Dbg( p_obj, "device supports raw VBI capture" );
2474
2475 if( p_sys->dev_cap.capabilities & V4L2_CAP_SLICED_VBI_CAPTURE )
2476 msg_Dbg( p_obj, "device supports sliced VBI capture" );
2477
2478 /* Now, enumerate all the video inputs. This is useless at the moment
2479 since we have no way to present that info to the user except with
2480 debug messages */
2481
2482 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2483 {
2484 struct v4l2_input t_input;
2485 memset( &t_input, 0, sizeof(t_input) );
2486 p_sys->i_input = 0;
2487 while( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &t_input ) >= 0 )
2488 {
2489 p_sys->i_input++;
2490 t_input.index = p_sys->i_input;
2491 }
2492
2493 free( p_sys->p_inputs );
2494 p_sys->p_inputs = calloc( 1, p_sys->i_input * sizeof( struct v4l2_input ) );
2495 if( !p_sys->p_inputs ) goto open_failed;
2496
2497 for( i_index = 0; i_index < p_sys->i_input; i_index++ )
2498 {
2499 p_sys->p_inputs[i_index].index = i_index;
2500
2501 if( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &p_sys->p_inputs[i_index] ) )
2502 {
2503 msg_Err( p_obj, "cannot get video input characteristics (%m)" );
2504 goto open_failed;
2505 }
2506 msg_Dbg( p_obj, "video input %i (%s) has type: %s %c",
2507 i_index,
2508 p_sys->p_inputs[i_index].name,
2509 p_sys->p_inputs[i_index].type
2510 == V4L2_INPUT_TYPE_TUNER ?
2511 "Tuner adapter" :
2512 "External analog input",
2513 i_index == p_sys->i_selected_input ? '*' : ' ' );
2514 }
2515 }
2516
2517 /* Probe video standards */
2518 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2519 {
2520 struct v4l2_standard t_standards;
2521 t_standards.index = 0;
2522 p_sys->i_standard = 0;
2523 while( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &t_standards ) >=0 )
2524 {
2525 p_sys->i_standard++;
2526 t_standards.index = p_sys->i_standard;
2527 }
2528
2529 free( p_sys->p_standards );
2530 p_sys->p_standards = calloc( 1, p_sys->i_standard * sizeof( struct v4l2_standard ) );
2531 if( !p_sys->p_standards ) goto open_failed;
2532
2533 for( i_standard = 0; i_standard < p_sys->i_standard; i_standard++ )
2534 {
2535 p_sys->p_standards[i_standard].index = i_standard;
2536
2537 if( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &p_sys->p_standards[i_standard] ) )
2538 {
2539 msg_Err( p_obj, "cannot get video input standards (%m)" );
2540 goto open_failed;
2541 }
2542 msg_Dbg( p_obj, "video standard %i is: %s %c",
2543 i_standard,
2544 p_sys->p_standards[i_standard].name,
2545 (p_sys->p_standards[i_standard].id & p_sys->i_selected_standard_id) ? '*' : ' ' );
2546 }
2547 }
2548
2549 /* initialize the structures for the ioctls */
2550 for( i_index = 0; i_index < 32; i_index++ )
2551 {
2552 p_sys->p_audios[i_index].index = i_index;
2553 }
2554
2555 /* Probe audio inputs */
2556 if( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO )
2557 {
2558 while( p_sys->i_audio < 32 &&
2559 v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_audio] ) >= 0 )
2560 {
2561 if( v4l2_ioctl( i_fd, VIDIOC_G_AUDIO, &p_sys->p_audios[ p_sys->i_audio] ) < 0 )
2562 {
2563 msg_Err( p_obj, "cannot get audio input characteristics (%m)" );
2564 goto open_failed;
2565 }
2566
2567 msg_Dbg( p_obj, "audio input %i (%s) is %s %s %c",
2568 p_sys->i_audio,
2569 p_sys->p_audios[p_sys->i_audio].name,
2570 p_sys->p_audios[p_sys->i_audio].capability &
2571 V4L2_AUDCAP_STEREO ?
2572 "Stereo" : "Mono",
2573 p_sys->p_audios[p_sys->i_audio].capability &
2574 V4L2_AUDCAP_AVL ?
2575 "(Automatic Volume Level supported)" : "",
2576 p_sys->i_audio == p_sys->i_selected_audio_input ? '*' : ' ' );
2577
2578 p_sys->i_audio++;
2579 }
2580 }
2581
2582 /* List tuner caps */
2583 if( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER )
2584 {
2585 struct v4l2_tuner tuner;
2586 memset( &tuner, 0, sizeof(tuner) );
2587 p_sys->i_tuner = 0;
2588 while( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &tuner ) >= 0 )
2589 {
2590 p_sys->i_tuner++;
2591 memset( &tuner, 0, sizeof(tuner) );
2592 tuner.index = p_sys->i_tuner;
2593 }
2594
2595 free( p_sys->p_tuners );
2596 p_sys->p_tuners = calloc( 1, p_sys->i_tuner * sizeof( struct v4l2_tuner ) );
2597 if( !p_sys->p_tuners ) goto open_failed;
2598
2599 for( i_index = 0; i_index < p_sys->i_tuner; i_index++ )
2600 {
2601 p_sys->p_tuners[i_index].index = i_index;
2602
2603 if( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &p_sys->p_tuners[i_index] ) )
2604 {
2605 msg_Err( p_obj, "cannot get tuner characteristics (%m)" );
2606 goto open_failed;
2607 }
2608 msg_Dbg( p_obj, "tuner %i (%s) has type: %s, "
2609 "frequency range: %.1f %s -> %.1f %s",
2610 i_index,
2611 p_sys->p_tuners[i_index].name,
2612 p_sys->p_tuners[i_index].type
2613 == V4L2_TUNER_RADIO ?
2614 "Radio" : "Analog TV",
2615 p_sys->p_tuners[i_index].rangelow * 62.5,
2616 p_sys->p_tuners[i_index].capability &
2617 V4L2_TUNER_CAP_LOW ?
2618 "Hz" : "kHz",
2619 p_sys->p_tuners[i_index].rangehigh * 62.5,
2620 p_sys->p_tuners[i_index].capability &
2621 V4L2_TUNER_CAP_LOW ?
2622 "Hz" : "kHz" );
2623
2624 struct v4l2_frequency frequency;
2625 memset( &frequency, 0, sizeof( frequency ) );
2626 if( v4l2_ioctl( i_fd, VIDIOC_G_FREQUENCY, &frequency ) < 0 )
2627 {
2628 msg_Err( p_obj, "cannot get tuner frequency (%m)" );
2629 goto open_failed;
2630 }
2631 msg_Dbg( p_obj, "tuner %i (%s) frequency: %.1f %s",
2632 i_index,
2633 p_sys->p_tuners[i_index].name,
2634 frequency.frequency * 62.5,
2635 p_sys->p_tuners[i_index].capability &
2636 V4L2_TUNER_CAP_LOW ?
2637 "Hz" : "kHz" );
2638 }
2639 }
2640
2641 /* Probe for available chromas */
2642 if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
2643 {
2644 struct v4l2_fmtdesc codec;
2645
2646 i_index = 0;
2647 memset( &codec, 0, sizeof(codec) );
2648 codec.index = i_index;
2649 codec.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2650
2651 while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &codec ) >= 0 )
2652 {
2653 i_index++;
2654 codec.index = i_index;
2655 }
2656
2657 p_sys->i_codec = i_index;
2658
2659 free( p_sys->p_codecs );
2660 p_sys->p_codecs = calloc( 1, p_sys->i_codec * sizeof( struct v4l2_fmtdesc ) );
2661
2662 for( i_index = 0; i_index < p_sys->i_codec; i_index++ )
2663 {
2664 p_sys->p_codecs[i_index].index = i_index;
2665 p_sys->p_codecs[i_index].type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2666
2667 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &p_sys->p_codecs[i_index] ) < 0 )
2668 {
2669 msg_Err( p_obj, "cannot get codec description (%m)" );
2670 goto open_failed;
2671 }
2672
2673 /* only print if vlc supports the format */
2674 char psz_fourcc_v4l2[5];
2675 memset( &psz_fourcc_v4l2, 0, sizeof( psz_fourcc_v4l2 ) );
2676 vlc_fourcc_to_char( p_sys->p_codecs[i_index].pixelformat,
2677 &psz_fourcc_v4l2 );
2678 bool b_codec_supported = false;
2679 for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
2680 {
2681 if( v4l2chroma_to_fourcc[i].i_v4l2 == p_sys->p_codecs[i_index].pixelformat )
2682 {
2683 b_codec_supported = true;
2684
2685 char psz_fourcc[5];
2686 memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
2687 vlc_fourcc_to_char( v4l2chroma_to_fourcc[i].i_fourcc,
2688 &psz_fourcc );
2689 msg_Dbg( p_obj, "device supports chroma %4.4s [%s, %s]",
2690 psz_fourcc,
2691 p_sys->p_codecs[i_index].description,
2692 psz_fourcc_v4l2 );
2693
2694 #ifdef VIDIOC_ENUM_FRAMESIZES
2695 /* This is new in Linux 2.6.19 */
2696 /* List valid frame sizes for this format */
2697 struct v4l2_frmsizeenum frmsize;
2698 memset( &frmsize, 0, sizeof(frmsize) );
2699 frmsize.pixel_format = p_sys->p_codecs[i_index].pixelformat;
2700 if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) < 0 )
2701 {
2702 /* Not all devices support this ioctl */
2703 msg_Warn( p_obj, "Unable to query for frame sizes" );
2704 }
2705 else
2706 {
2707 switch( frmsize.type )
2708 {
2709 case V4L2_FRMSIZE_TYPE_DISCRETE:
2710 do
2711 {
2712 msg_Dbg( p_obj,
2713 " device supports size %dx%d",
2714 frmsize.discrete.width, frmsize.discrete.height );
2715 frmsize.index++;
2716 } while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 );
2717 break;
2718 case V4L2_FRMSIZE_TYPE_STEPWISE:
2719 msg_Dbg( p_obj,
2720 " device supports sizes %dx%d to %dx%d using %dx%d increments",
2721 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2722 frmsize.stepwise.max_width, frmsize.stepwise.max_height,
2723 frmsize.stepwise.step_width, frmsize.stepwise.step_height );
2724 break;
2725 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
2726 msg_Dbg( p_obj,
2727 " device supports all sizes %dx%d to %dx%d",
2728 frmsize.stepwise.min_width, frmsize.stepwise.min_height,
2729 frmsize.stepwise.max_width, frmsize.stepwise.max_height );
2730 break;
2731 }
2732 }
2733 #endif
2734 }
2735 }
2736 if( !b_codec_supported )
2737 {
2738 msg_Dbg( p_obj,
2739 "device codec %4.4s (%s) not supported",
2740 psz_fourcc_v4l2,
2741 p_sys->p_codecs[i_index].description );
2742 }
2743 }
2744 }
2745
2746
2747 if( i_fd >= 0 ) v4l2_close( i_fd );
2748 return true;
2749
2750 open_failed:
2751
2752 if( i_fd >= 0 ) v4l2_close( i_fd );
2753 return false;
2754
2755 }
2756
2757 static void name2var( unsigned char *name )
2758 {
2759 for( ; *name; name++ )
2760 *name = (*name == ' ') ? '_' : tolower( *name );
2761 }
2762
2763 /*****************************************************************************
2764 * Print a user-class v4l2 control's details, create the relevant variable,
2765 * change the value if needed.
2766 *****************************************************************************/
2767 static void ControlListPrint( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2768 struct v4l2_queryctrl queryctrl,
2769 bool b_reset, bool b_demux )
2770 {
2771 struct v4l2_querymenu querymenu;
2772 unsigned int i_mid;
2773
2774 int i;
2775 int i_val;
2776
2777 char *psz_name;
2778 vlc_value_t val, val2;
2779
2780 if( queryctrl.flags & V4L2_CTRL_FLAG_GRABBED )
2781 msg_Dbg( p_obj, " control is busy" );
2782 if( queryctrl.flags & V4L2_CTRL_FLAG_READ_ONLY )
2783 msg_Dbg( p_obj, " control is read-only" );
2784
2785 for( i = 0; controls[i].psz_name != NULL; i++ )
2786 if( controls[i].i_cid == queryctrl.id ) break;
2787
2788 if( controls[i].psz_name )
2789 {
2790 psz_name = strdup( controls[i].psz_name );
2791 char psz_cfg_name[40];
2792 sprintf( psz_cfg_name, CFG_PREFIX "%s", psz_name );
2793 i_val = var_CreateGetInteger( p_obj, psz_cfg_name );
2794 var_Destroy( p_obj, psz_cfg_name );
2795 }
2796 else
2797 {
2798 psz_name = strdup( (const char *)queryctrl.name );
2799 name2var( (unsigned char *)psz_name );
2800 i_val = -1;
2801 }
2802
2803 switch( queryctrl.type )
2804 {
2805 case V4L2_CTRL_TYPE_INTEGER:
2806 msg_Dbg( p_obj, " integer control" );
2807 msg_Dbg( p_obj,
2808 " valid values: %d to %d by steps of %d",
2809 queryctrl.minimum, queryctrl.maximum,
2810 queryctrl.step );
2811
2812 var_Create( p_obj, psz_name,
2813 VLC_VAR_INTEGER | VLC_VAR_HASMIN | VLC_VAR_HASMAX
2814 | VLC_VAR_HASSTEP | VLC_VAR_ISCOMMAND );
2815 val.i_int = queryctrl.minimum;
2816 var_Change( p_obj, psz_name, VLC_VAR_SETMIN, &val, NULL );
2817 val.i_int = queryctrl.maximum;
2818 var_Change( p_obj, psz_name, VLC_VAR_SETMAX, &val, NULL );
2819 val.i_int = queryctrl.step;
2820 var_Change( p_obj, psz_name, VLC_VAR_SETSTEP, &val, NULL );
2821 break;
2822 case V4L2_CTRL_TYPE_BOOLEAN:
2823 msg_Dbg( p_obj, " boolean control" );
2824 var_Create( p_obj, psz_name,
2825 VLC_VAR_BOOL | VLC_VAR_ISCOMMAND );
2826 break;
2827 case V4L2_CTRL_TYPE_MENU:
2828 msg_Dbg( p_obj, " menu control" );
2829 var_Create( p_obj, psz_name,
2830 VLC_VAR_INTEGER | VLC_VAR_HASCHOICE
2831 | VLC_VAR_ISCOMMAND );
2832 memset( &querymenu, 0, sizeof( querymenu ) );
2833 for( i_mid = queryctrl.minimum;
2834 i_mid <= (unsigned)queryctrl.maximum;
2835 i_mid++ )
2836 {
2837 querymenu.index = i_mid;
2838 querymenu.id = queryctrl.id;
2839 if( v4l2_ioctl( i_fd, VIDIOC_QUERYMENU, &querymenu ) >= 0 )
2840 {
2841 msg_Dbg( p_obj, " %d: %s",
2842 querymenu.index, querymenu.name );
2843 val.i_int = querymenu.index;
2844 val2.psz_string = (char *)querymenu.name;
2845 var_Change( p_obj, psz_name,
2846 VLC_VAR_ADDCHOICE, &val, &val2 );
2847 }
2848 }
2849 break;
2850 case V4L2_CTRL_TYPE_BUTTON:
2851 msg_Dbg( p_obj, " button control" );
2852 var_Create( p_obj, psz_name,
2853 VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2854 break;
2855 case V4L2_CTRL_TYPE_CTRL_CLASS:
2856 msg_Dbg( p_obj, " control class" );
2857 var_Create( p_obj, psz_name, VLC_VAR_VOID );
2858 break;
2859 default:
2860 msg_Dbg( p_obj, " unknown control type (FIXME)" );
2861 /* FIXME */
2862 break;
2863 }
2864
2865 switch( queryctrl.type )
2866 {
2867 case V4L2_CTRL_TYPE_INTEGER:
2868 case V4L2_CTRL_TYPE_BOOLEAN:
2869 case V4L2_CTRL_TYPE_MENU:
2870 {
2871 struct v4l2_control control;
2872 msg_Dbg( p_obj, " default value: %d",
2873 queryctrl.default_value );
2874 memset( &control, 0, sizeof( control ) );
2875 control.id = queryctrl.id;
2876 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0 )
2877 {
2878 msg_Dbg( p_obj, " current value: %d", control.value );
2879 }
2880 if( i_val == -1 )
2881 {
2882 i_val = control.value;
2883 if( b_reset && queryctrl.default_value != control.value )
2884 {
2885 msg_Dbg( p_obj, " reset value to default" );
2886 Control( p_obj, p_sys, i_fd, psz_name,
2887 queryctrl.id, queryctrl.default_value );
2888 }
2889 }
2890 else
2891 {
2892 Control( p_obj, p_sys, i_fd, psz_name,
2893 queryctrl.id, i_val );
2894 }
2895 }
2896 break;
2897 default:
2898 break;
2899 }
2900
2901 val.psz_string = (char *)queryctrl.name;
2902 var_Change( p_obj, psz_name, VLC_VAR_SETTEXT, &val, NULL );
2903 val.i_int = queryctrl.id;
2904 val2.psz_string = (char *)psz_name;
2905 var_Change( p_obj, "allcontrols", VLC_VAR_ADDCHOICE, &val, &val2 );
2906 /* bad things happen changing MPEG mid-stream
2907 * so don't add to Ext Settings GUI */
2908 if( V4L2_CTRL_ID2CLASS( queryctrl.id ) != V4L2_CTRL_CLASS_MPEG )
2909 var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2910
2911 switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
2912 {
2913 case VLC_VAR_BOOL:
2914 var_SetBool( p_obj, psz_name, i_val );
2915 break;
2916 case VLC_VAR_INTEGER:
2917 var_SetInteger( p_obj, psz_name, i_val );
2918 break;
2919 case VLC_VAR_VOID:
2920 break;
2921 default:
2922 msg_Warn( p_obj, "FIXME: %s %s %d", __FILE__, __func__,
2923 __LINE__ );
2924 break;
2925 }
2926
2927 if( b_demux )
2928 var_AddCallback( p_obj, psz_name,
2929 DemuxControlCallback, (void*)(intptr_t)queryctrl.id );
2930 else
2931 var_AddCallback( p_obj, psz_name,
2932 AccessControlCallback, (void*)(intptr_t)queryctrl.id );
2933
2934 free( psz_name );
2935 }
2936
2937 /*****************************************************************************
2938 * List all user-class v4l2 controls, set them to the user specified
2939 * value and create the relevant variables to enable runtime changes
2940 *****************************************************************************/
2941 static int ControlList( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
2942 bool b_reset, bool b_demux )
2943 {
2944 struct v4l2_queryctrl queryctrl;
2945 int i_cid;
2946
2947 memset( &queryctrl, 0, sizeof( queryctrl ) );
2948
2949 /* A list of available controls (aka the variable name) will be
2950 * stored as choices in the "allcontrols" variable. We'll thus be able
2951 * to use those to create an appropriate interface
2952 * A list of available controls that can be changed mid-stream will
2953 * be stored in the "controls" variable */
2954 var_Create( p_obj, "controls", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2955 var_Create( p_obj, "allcontrols", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
2956
2957 var_Create( p_obj, "controls-update", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2958
2959 /* Add a control to reset all controls to their default values */
2960 vlc_value_t val, val2;
2961 var_Create( p_obj, "controls-reset", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
2962 val.psz_string = _( "Reset controls to default" );
2963 var_Change( p_obj, "controls-reset", VLC_VAR_SETTEXT, &val, NULL );
2964 val.i_int = -1;
2965 val2.psz_string = (char *)"controls-reset";
2966 var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
2967 if (b_demux)
2968 var_AddCallback( p_obj, "controls-reset", DemuxControlResetCallback, NULL );
2969 else
2970 var_AddCallback( p_obj, "controls-reset", AccessControlResetCallback, NULL );
2971
2972 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2973 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2974 {
2975 msg_Dbg( p_obj, "Extended control API supported by v4l2 driver" );
2976
2977 /* List extended controls */
2978 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
2979 while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
2980 {
2981 if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS )
2982 {
2983 msg_Dbg( p_obj, "%s", queryctrl.name );
2984 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
2985 continue;
2986 }
2987 switch( V4L2_CTRL_ID2CLASS( queryctrl.id ) )
2988 {
2989 case V4L2_CTRL_CLASS_USER:
2990 msg_Dbg( p_obj, "Available control: %s (%x)",
2991 queryctrl.name, queryctrl.id );
2992 break;
2993 case V4L2_CTRL_CLASS_MPEG:
2994 name2var( queryctrl.name );
2995 msg_Dbg( p_obj, "Available MPEG control: %s (%x)",
2996 queryctrl.name, queryctrl.id );
2997 break;
2998 default:
2999 msg_Dbg( p_obj, "Available private control: %s (%x)",
3000 queryctrl.name, queryctrl.id );
3001 break;
3002 }
3003 ControlListPrint( p_obj, p_sys, i_fd, queryctrl, b_reset, b_demux );
3004 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
3005 }
3006 }
3007 else
3008 {
3009 msg_Dbg( p_obj, "Extended control API not supported by v4l2 driver" );
3010
3011 /* List public controls */
3012 for( i_cid = V4L2_CID_BASE;
3013 i_cid < V4L2_CID_LASTP1;
3014 i_cid ++ )
3015 {
3016 queryctrl.id = i_cid;
3017 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3018 {
3019 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3020 continue;
3021 msg_Dbg( p_obj, "Available control: %s (%x)",
3022 queryctrl.name, queryctrl.id );
3023 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
3024 b_reset, b_demux );
3025 }
3026 }
3027
3028 /* List private controls */
3029 for( i_cid = V4L2_CID_PRIVATE_BASE;
3030 ;
3031 i_cid ++ )
3032 {
3033 queryctrl.id = i_cid;
3034 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3035 {
3036 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3037 continue;
3038 msg_Dbg( p_obj, "Available private control: %s (%x)",
3039 queryctrl.name, queryctrl.id );
3040 ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
3041 b_reset, b_demux );
3042 }
3043 else
3044 break;
3045 }
3046 }
3047
3048 return VLC_SUCCESS;
3049 }
3050
3051 static void SetAvailControlsByString( vlc_object_t *p_obj, demux_sys_t *p_sys,
3052 int i_fd )
3053 {
3054 char *psz_parser = p_sys->psz_set_ctrls;
3055 vlc_value_t val, text, name;
3056
3057 if( psz_parser == NULL )
3058 return;
3059
3060 if( *psz_parser == '{' )
3061 psz_parser++;
3062
3063 int i_ret = var_Change( p_obj, "allcontrols", VLC_VAR_GETCHOICES,
3064 &val, &text );
3065 if( i_ret < 0 )
3066 {
3067 msg_Err( p_obj, "Oops, can't find 'allcontrols' variable." );
3068 return;
3069 }
3070
3071 while( *psz_parser && *psz_parser != '}' )
3072 {
3073 char *psz_delim, *psz_assign;
3074
3075 while( *psz_parser == ',' || *psz_parser == ' ' )
3076 psz_parser++;
3077
3078 psz_delim = strchr( psz_parser, ',' );
3079 if( psz_delim == NULL )
3080 psz_delim = strchr( psz_parser, '}' );
3081 if( psz_delim == NULL )
3082 psz_delim = psz_parser + strlen( psz_parser );
3083
3084 psz_assign = memchr( psz_parser, '=', psz_delim - psz_parser );
3085 if( psz_assign == NULL )
3086 {
3087 char *psz_name = strndup( psz_parser, psz_delim - psz_parser );
3088 msg_Err( p_obj, "%s missing '='", psz_name );
3089 free( psz_name );
3090 psz_parser = psz_delim + 1;
3091 continue;
3092 }
3093
3094 for( int i = 0;
3095 i < val.p_list->i_count ;//&& psz_parser < psz_assign;
3096 i++ )
3097 {
3098 const char *psz_var = text.p_list->p_values[i].psz_string;
3099 int i_cid = val.p_list->p_values[i].i_int;
3100 var_Change( p_obj, psz_var, VLC_VAR_GETTEXT, &name, NULL );
3101 const char *psz_name = name.psz_string;
3102
3103 int i_availstrlen = strlen( psz_name );
3104 int i_parsestrlen = psz_assign - psz_parser;
3105 int i_maxstrlen = __MAX( i_availstrlen, i_parsestrlen);
3106
3107 if( !strncasecmp( psz_name, psz_parser, i_maxstrlen ) )
3108 {
3109 Control( p_obj, p_sys, i_fd, psz_name, i_cid,
3110 strtol( ++psz_assign, &psz_parser, 0) );
3111 }
3112 free( name.psz_string );
3113 }
3114
3115 if( psz_parser < psz_assign )
3116 {
3117 char *psz_name = strndup( psz_parser, psz_assign - psz_parser );
3118 msg_Err( p_obj, "Control %s not available", psz_name );
3119 free( psz_name );
3120 psz_parser = ( *psz_delim ) ? ( psz_delim + 1 ) : psz_delim;
3121 }
3122 }
3123 var_FreeList( &val, &text );
3124 }
3125
3126 /*****************************************************************************
3127 * Reset all user-class v4l2 controls to their default value
3128 *****************************************************************************/
3129 static int ControlReset( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd )
3130 {
3131 struct v4l2_queryctrl queryctrl;
3132 int i_cid;
3133 memset( &queryctrl, 0, sizeof( queryctrl ) );
3134
3135 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
3136 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3137 {
3138 /* Extended control API supported */
3139 queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
3140 while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3141 {
3142 if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS
3143 || V4L2_CTRL_ID2CLASS( queryctrl.id ) == V4L2_CTRL_CLASS_MPEG )
3144 {
3145 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
3146 continue;
3147 }
3148 struct v4l2_control control;
3149 memset( &control, 0, sizeof( control ) );
3150 control.id = queryctrl.id;
3151 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
3152 && queryctrl.default_value != control.value )
3153 {
3154 int i;
3155 for( i = 0; controls[i].psz_name != NULL; i++ )
3156 if( controls[i].i_cid == queryctrl.id ) break;
3157 name2var( queryctrl.name );
3158 Control( p_obj, p_sys, i_fd,
3159 controls[i].psz_name ? controls[i].psz_name
3160 : (const char *)queryctrl.name,
3161 queryctrl.id, queryctrl.default_value );
3162 }
3163 queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
3164 }
3165 }
3166 else
3167 {
3168
3169 /* public controls */
3170 for( i_cid = V4L2_CID_BASE;
3171 i_cid < V4L2_CID_LASTP1;
3172 i_cid ++ )
3173 {
3174 queryctrl.id = i_cid;
3175 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3176 {
3177 struct v4l2_control control;
3178 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3179 continue;
3180 memset( &control, 0, sizeof( control ) );
3181 control.id = queryctrl.id;
3182 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
3183 && queryctrl.default_value != control.value )
3184 {
3185 int i;
3186 for( i = 0; controls[i].psz_name != NULL; i++ )
3187 if( controls[i].i_cid == queryctrl.id ) break;
3188 name2var( queryctrl.name );
3189 Control( p_obj, p_sys, i_fd,
3190 controls[i].psz_name ? controls[i].psz_name
3191 : (const char *)queryctrl.name,
3192 queryctrl.id, queryctrl.default_value );
3193 }
3194 }
3195 }
3196
3197 /* private controls */
3198 for( i_cid = V4L2_CID_PRIVATE_BASE;
3199 ;
3200 i_cid ++ )
3201 {
3202 queryctrl.id = i_cid;
3203 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
3204 {
3205 struct v4l2_control control;
3206 if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3207 continue;
3208 memset( &control, 0, sizeof( control ) );
3209 control.id = queryctrl.id;
3210 if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
3211 && queryctrl.default_value != control.value )
3212 {
3213 name2var( queryctrl.name );
3214 Control( p_obj, p_sys, i_fd, (const char *)queryctrl.name,
3215 queryctrl.id, queryctrl.default_value );
3216 }
3217 }
3218 else
3219 break;
3220 }
3221 }
3222 return VLC_SUCCESS;
3223 }
3224
3225 /*****************************************************************************
3226 * Issue user-class v4l2 controls
3227 *****************************************************************************/
3228 static int Control( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
3229 const char *psz_name, int i_cid, int i_value )
3230 {
3231 (void)p_sys;
3232 struct v4l2_queryctrl queryctrl;
3233 struct v4l2_control control;
3234 struct v4l2_ext_control ext_control;
3235 struct v4l2_ext_controls ext_controls;
3236
3237 if( i_value == -1 )
3238 return VLC_SUCCESS;
3239
3240 memset( &queryctrl, 0, sizeof( queryctrl ) );
3241
3242 queryctrl.id = i_cid;
3243
3244 if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) < 0
3245 || queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
3246 {
3247 msg_Dbg( p_obj, "%s (%x) control is not supported.", psz_name, i_cid );
3248 return VLC_EGENERIC;
3249 }
3250
3251 memset( &control, 0, sizeof( control ) );
3252 memset( &ext_control, 0, sizeof( ext_control ) );
3253 memset( &ext_controls, 0, sizeof( ext_controls ) );
3254 control.id = i_cid;
3255 ext_control.id = i_cid;
3256 ext_controls.ctrl_class = V4L2_CTRL_ID2CLASS( i_cid );
3257 ext_controls.count = 1;
3258 ext_controls.controls = &ext_control;
3259
3260 int i_ret = -1;
3261
3262 if( i_value >= queryctrl.minimum && i_value <= queryctrl.maximum )
3263 {
3264 ext_control.value = i_value;
3265 if( v4l2_ioctl( i_fd, VIDIOC_S_EXT_CTRLS, &ext_controls ) < 0 )
3266 {
3267 control.value = i_value;
3268 if( v4l2_ioctl( i_fd, VIDIOC_S_CTRL, &control ) < 0 )
3269 {
3270 msg_Err( p_obj, "unable to set %s (%x) to %d (%m)",
3271 psz_name, i_cid, i_value );
3272 return VLC_EGENERIC;
3273 }
3274 i_ret = v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control );
3275 }
3276 else
3277 {
3278 i_ret = v4l2_ioctl( i_fd, VIDIOC_G_EXT_CTRLS, &ext_controls );
3279 control.value = ext_control.value;
3280 }
3281 }
3282
3283 if( i_ret >= 0 )
3284 {
3285 vlc_value_t val;
3286 msg_Dbg( p_obj, "video %s: %d", psz_name, control.value );
3287 switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
3288 {
3289 case VLC_VAR_BOOL:
3290 val.b_bool = control.value;
3291 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3292 var_TriggerCallback( p_obj, "controls-update" );
3293 break;
3294 case VLC_VAR_INTEGER:
3295 val.i_int = control.value;
3296 var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
3297 var_TriggerCallback( p_obj, "controls-update" );
3298 break;
3299 }
3300 }
3301 return VLC_SUCCESS;
3302 }
3303
3304 /*****************************************************************************
3305 * On the fly change settings callback
3306 *****************************************************************************/
3307 static int DemuxControlCallback( vlc_object_t *p_this,
3308 const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3309 void *p_data )
3310 {
3311 (void)oldval;
3312 demux_t *p_demux = (demux_t*)p_this;
3313 demux_sys_t *p_sys = p_demux->p_sys;
3314 int i_cid = (long int)p_data;
3315
3316 int i_fd = p_sys->i_fd;
3317
3318 if( i_fd < 0 )
3319 return VLC_EGENERIC;
3320
3321 Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3322
3323 return VLC_EGENERIC;
3324 }
3325
3326 static int DemuxControlResetCallback( vlc_object_t *p_this,
3327 const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3328 {
3329 (void)psz_var; (void)oldval; (void)newval; (void)p_data;
3330 demux_t *p_demux = (demux_t*)p_this;
3331 demux_sys_t *p_sys = p_demux->p_sys;
3332
3333 int i_fd = p_sys->i_fd;
3334
3335 if( i_fd < 0 )
3336 return VLC_EGENERIC;
3337
3338 ControlReset( p_this, p_sys, i_fd );
3339
3340 return VLC_EGENERIC;
3341 }
3342
3343 static int AccessControlCallback( vlc_object_t *p_this,
3344 const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
3345 void *p_data )
3346 {
3347 (void)oldval;
3348 access_t *p_access = (access_t *)p_this;
3349 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3350 int i_cid = (long int)p_data;
3351
3352 int i_fd = p_sys->i_fd;
3353
3354 if( i_fd < 0 )
3355 return VLC_EGENERIC;
3356
3357 Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
3358
3359 return VLC_EGENERIC;
3360 }
3361
3362 static int AccessControlResetCallback( vlc_object_t *p_this,
3363 const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
3364 {
3365 (void)psz_var; (void)oldval; (void)newval; (void)p_data;
3366 access_t *p_access = (access_t *)p_this;
3367 demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
3368
3369 int i_fd = p_sys->i_fd;
3370
3371 if( i_fd < 0 )
3372 return VLC_EGENERIC;
3373
3374 ControlReset( p_this, p_sys, i_fd );
3375
3376 return VLC_EGENERIC;
3377 }