1 /*****************************************************************************
2 * v4l.c : Video4Linux input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2002-2004 the VideoLAN team
7 * Author: Laurent Aimar <fenrir@via.ecp.fr>
8 * Paul Forgey <paulf at aphrodite dot com>
9 * Gildas Bazin <gbazin@videolan.org>
10 * Benjamin Pracht <bigben at videolan dot org>
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.
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.
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 *****************************************************************************/
27 /*****************************************************************************
29 *****************************************************************************/
33 #include <vlc_input.h>
34 #include <vlc_demux.h>
35 #include <vlc_access.h>
37 #include <vlc_codecs.h>
39 #include <sys/types.h>
41 #include <sys/ioctl.h>
47 /* From GStreamer's v4l plugin:
48 * Because of some really cool feature in video4linux1, also known as
49 * 'not including sys/types.h and sys/time.h', we had to include it
50 * ourselves. In all their intelligence, these people decided to fix
51 * this in the next version (video4linux2) in such a cool way that it
52 * breaks all compilations of old stuff...
53 * The real problem is actually that linux/time.h doesn't use proper
54 * macro checks before defining types like struct timeval. The proper
55 * fix here is to either fuck the kernel header (which is what we do
56 * by defining _LINUX_TIME_H, an innocent little hack) or by fixing it
57 * upstream, which I'll consider doing later on. If you get compiler
58 * errors here, check your linux/time.h && sys/time.h header setup.
62 #include <linux/videodev.h>
63 #include "videodev_mjpeg.h"
65 #include <sys/soundcard.h>
67 /*****************************************************************************
69 *****************************************************************************/
70 static int Open ( vlc_object_t * );
71 static void Close( vlc_object_t * );
73 #define CACHING_TEXT N_("Caching value in ms")
74 #define CACHING_LONGTEXT N_( \
75 "Caching value for V4L captures. This " \
76 "value should be set in milliseconds." )
77 #define VDEV_TEXT N_("Video device name")
78 #define VDEV_LONGTEXT N_( \
79 "Name of the video device to use. " \
80 "If you don't specify anything, no video device will be used.")
81 #define ADEV_TEXT N_("Audio device name")
82 #define ADEV_LONGTEXT N_( \
83 "Name of the audio device to use. " \
84 "If you don't specify anything, no audio device will be used.")
85 #define CHROMA_TEXT N_("Video input chroma format")
86 #define CHROMA_LONGTEXT N_( \
87 "Force the Video4Linux video device to use a specific chroma format " \
88 "(eg. I420 (default), RV24, etc.)")
89 #define FREQUENCY_TEXT N_( "Frequency" )
90 #define FREQUENCY_LONGTEXT N_( \
91 "Frequency to capture (in kHz), if applicable." )
92 #define CHANNEL_TEXT N_( "Channel" )
93 #define CHANNEL_LONGTEXT N_( \
94 "Channel of the card to use (Usually, 0 = tuner, " \
95 "1 = composite, 2 = svideo)." )
96 #define NORM_TEXT N_( "Norm" )
97 #define NORM_LONGTEXT N_( \
98 "Norm of the stream (Automatic, SECAM, PAL, or NTSC)." )
99 #define AUDIO_TEXT N_( "Audio Channel" )
100 #define AUDIO_LONGTEXT N_( \
101 "Audio Channel to use, if there are several audio inputs." )
102 #define WIDTH_TEXT N_( "Width" )
103 #define WIDTH_LONGTEXT N_( "Width of the stream to capture " \
104 "(-1 for autodetect)." )
105 #define HEIGHT_TEXT N_( "Height" )
106 #define HEIGHT_LONGTEXT N_( "Height of the stream to capture " \
107 "(-1 for autodetect)." )
108 #define BRIGHTNESS_TEXT N_( "Brightness" )
109 #define BRIGHTNESS_LONGTEXT N_( \
110 "Brightness of the video input." )
111 #define HUE_TEXT N_( "Hue" )
112 #define HUE_LONGTEXT N_( \
113 "Hue of the video input." )
114 #define COLOUR_TEXT N_( "Color" )
115 #define COLOUR_LONGTEXT N_( \
116 "Color of the video input." )
117 #define CONTRAST_TEXT N_( "Contrast" )
118 #define CONTRAST_LONGTEXT N_( \
119 "Contrast of the video input." )
120 #define TUNER_TEXT N_( "Tuner" )
121 #define TUNER_LONGTEXT N_( "Tuner to use, if there are several ones." )
122 #define SAMPLERATE_TEXT N_( "Samplerate" )
123 #define SAMPLERATE_LONGTEXT N_( \
124 "Samplerate of the captured audio stream, in Hz (eg: 11025, 22050, 44100)" )
125 #define STEREO_TEXT N_( "Stereo" )
126 #define STEREO_LONGTEXT N_( \
127 "Capture the audio stream in stereo." )
128 #define MJPEG_TEXT N_( "MJPEG" )
129 #define MJPEG_LONGTEXT N_( \
130 "Set this option if the capture device outputs MJPEG" )
131 #define DECIMATION_TEXT N_( "Decimation" )
132 #define DECIMATION_LONGTEXT N_( \
133 "Decimation level for MJPEG streams" )
134 #define QUALITY_TEXT N_( "Quality" )
135 #define QUALITY_LONGTEXT N_( "Quality of the stream." )
136 #define FPS_TEXT N_( "Framerate" )
137 #define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
138 "(-1 for autodetect)." )
140 static int i_norm_list[] =
141 { VIDEO_MODE_AUTO, VIDEO_MODE_SECAM, VIDEO_MODE_PAL, VIDEO_MODE_NTSC };
142 static const char *psz_norm_list_text[] =
143 { N_("Automatic"), N_("SECAM"), N_("PAL"), N_("NTSC") };
146 set_shortname( _("Video4Linux") );
147 set_description( _("Video4Linux input") );
148 set_category( CAT_INPUT );
149 set_subcategory( SUBCAT_INPUT_ACCESS );
151 add_integer( "v4l-caching", DEFAULT_PTS_DELAY / 1000, NULL,
152 CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
153 add_string( "v4l-vdev", "/dev/video", 0, VDEV_TEXT, VDEV_LONGTEXT,
155 add_string( "v4l-adev", "/dev/dsp", 0, ADEV_TEXT, ADEV_LONGTEXT,
157 add_string( "v4l-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
159 add_float( "v4l-fps", -1.0, NULL, FPS_TEXT, FPS_LONGTEXT, VLC_TRUE );
160 add_integer( "v4l-samplerate", 44100, NULL, SAMPLERATE_TEXT,
161 SAMPLERATE_LONGTEXT, VLC_TRUE );
162 add_integer( "v4l-channel", 0, NULL, CHANNEL_TEXT, CHANNEL_LONGTEXT,
164 add_integer( "v4l-tuner", -1, NULL, TUNER_TEXT, TUNER_LONGTEXT, VLC_TRUE );
165 add_integer( "v4l-norm", VIDEO_MODE_AUTO, NULL, NORM_TEXT, NORM_LONGTEXT,
167 change_integer_list( i_norm_list, psz_norm_list_text, 0 );
168 add_integer( "v4l-frequency", -1, NULL, FREQUENCY_TEXT, FREQUENCY_LONGTEXT,
170 add_integer( "v4l-audio", -1, NULL, AUDIO_TEXT, AUDIO_LONGTEXT, VLC_TRUE );
171 add_bool( "v4l-stereo", VLC_TRUE, NULL, STEREO_TEXT, STEREO_LONGTEXT,
173 add_integer( "v4l-width", 0, NULL, WIDTH_TEXT, WIDTH_LONGTEXT, VLC_TRUE );
174 add_integer( "v4l-height", 0, NULL, HEIGHT_TEXT, HEIGHT_LONGTEXT,
176 add_integer( "v4l-brightness", -1, NULL, BRIGHTNESS_TEXT,
177 BRIGHTNESS_LONGTEXT, VLC_TRUE );
178 add_integer( "v4l-colour", -1, NULL, COLOUR_TEXT, COLOUR_LONGTEXT,
180 add_integer( "v4l-hue", -1, NULL, HUE_TEXT, HUE_LONGTEXT, VLC_TRUE );
181 add_integer( "v4l-contrast", -1, NULL, CONTRAST_TEXT, CONTRAST_LONGTEXT,
183 add_bool( "v4l-mjpeg", VLC_FALSE, NULL, MJPEG_TEXT, MJPEG_LONGTEXT,
185 add_integer( "v4l-decimation", 1, NULL, DECIMATION_TEXT,
186 DECIMATION_LONGTEXT, VLC_TRUE );
187 add_integer( "v4l-quality", 100, NULL, QUALITY_TEXT, QUALITY_LONGTEXT,
190 add_shortcut( "v4l" );
191 set_capability( "access_demux", 10 );
192 set_callbacks( Open, Close );
195 /*****************************************************************************
196 * Access: local prototypes
197 *****************************************************************************/
198 static int Demux ( demux_t * );
199 static int Control( demux_t *, int, va_list );
201 static void ParseMRL ( demux_t * );
202 static int OpenVideoDev( demux_t *, char * );
203 static int OpenAudioDev( demux_t *, char * );
205 static block_t *GrabAudio( demux_t * );
206 static block_t *GrabVideo( demux_t * );
208 #define MJPEG_BUFFER_SIZE (256*1024)
210 struct quicktime_mjpeg_app1
212 uint32_t i_reserved; /* set to 0 */
213 uint32_t i_tag; /* 'mjpg' */
214 uint32_t i_field_size; /* offset following EOI */
215 uint32_t i_padded_field_size; /* offset following EOI+pad */
216 uint32_t i_next_field; /* offset to next field */
217 uint32_t i_DQT_offset;
218 uint32_t i_DHT_offset;
219 uint32_t i_SOF_offset;
220 uint32_t i_SOS_offset;
221 uint32_t i_data_offset; /* following SOS marker data */
229 } v4lchroma_to_fourcc[] =
231 { VIDEO_PALETTE_GREY, VLC_FOURCC( 'G', 'R', 'E', 'Y' ) },
232 { VIDEO_PALETTE_HI240, VLC_FOURCC( 'I', '2', '4', '0' ) },
233 { VIDEO_PALETTE_RGB565, VLC_FOURCC( 'R', 'V', '1', '6' ) },
234 { VIDEO_PALETTE_RGB555, VLC_FOURCC( 'R', 'V', '1', '5' ) },
235 { VIDEO_PALETTE_RGB24, VLC_FOURCC( 'R', 'V', '2', '4' ) },
236 { VIDEO_PALETTE_RGB32, VLC_FOURCC( 'R', 'V', '3', '2' ) },
237 { VIDEO_PALETTE_YUV422, VLC_FOURCC( 'Y', 'U', 'Y', '2' ) },
238 { VIDEO_PALETTE_YUV422, VLC_FOURCC( 'Y', 'U', 'Y', 'V' ) },
239 { VIDEO_PALETTE_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', '2' ) },
240 { VIDEO_PALETTE_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', 'V' ) },
241 { VIDEO_PALETTE_UYVY, VLC_FOURCC( 'U', 'Y', 'V', 'Y' ) },
242 { VIDEO_PALETTE_YUV420, VLC_FOURCC( 'I', '4', '2', 'N' ) },
243 { VIDEO_PALETTE_YUV411, VLC_FOURCC( 'I', '4', '1', 'N' ) },
244 { VIDEO_PALETTE_RAW, VLC_FOURCC( 'G', 'R', 'A', 'W' ) },
245 { VIDEO_PALETTE_YUV422P, VLC_FOURCC( 'I', '4', '2', '2' ) },
246 { VIDEO_PALETTE_YUV420P, VLC_FOURCC( 'I', '4', '2', '0' ) },
247 { VIDEO_PALETTE_YUV411P, VLC_FOURCC( 'I', '4', '1', '1' ) },
254 char *psz_device; /* Main device from MRL, can be video or audio */
262 /* Video properties */
279 float f_fps; /* <= 0.0 mean to grab at full rate */
280 mtime_t i_video_pts; /* only used when f_fps > 0 */
286 struct video_capability vid_cap;
287 struct video_mbuf vid_mbuf;
288 struct mjpeg_requestbuffers mjpeg_buffers;
290 uint8_t *p_video_mmap;
293 struct video_mmap vid_mmap;
294 struct video_picture vid_picture;
296 int i_video_frame_size;
297 es_out_id_t *p_es_video;
299 /* Audio properties */
300 vlc_fourcc_t i_acodec_raw;
303 int i_audio_max_frame_size;
304 block_t *p_block_audio;
305 es_out_id_t *p_es_audio;
308 /*****************************************************************************
309 * Open: opens v4l device
310 *****************************************************************************
312 * url: <video device>::::
314 *****************************************************************************/
315 static int Open( vlc_object_t *p_this )
317 demux_t *p_demux = (demux_t*)p_this;
321 /* Only when selected */
322 if( *p_demux->psz_access == '\0' )
326 p_demux->pf_demux = Demux;
327 p_demux->pf_control = Control;
328 p_demux->info.i_update = 0;
329 p_demux->info.i_title = 0;
330 p_demux->info.i_seekpoint = 0;
331 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
332 memset( p_sys, 0, sizeof( demux_sys_t ) );
334 var_Create( p_demux, "v4l-audio", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
335 var_Get( p_demux, "v4l-audio", &val );
336 p_sys->i_audio = val.i_int;
338 var_Create( p_demux, "v4l-channel", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
339 var_Get( p_demux, "v4l-channel", &val );
340 p_sys->i_channel = val.i_int;
342 var_Create( p_demux, "v4l-norm", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
343 var_Get( p_demux, "v4l-norm", &val );
344 p_sys->i_norm = val.i_int;
346 var_Create( p_demux, "v4l-tuner", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
347 var_Get( p_demux, "v4l-tuner", &val );
348 p_sys->i_tuner = val.i_int;
350 var_Create( p_demux, "v4l-frequency",
351 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
352 var_Get( p_demux, "v4l-frequency", &val );
353 p_sys->i_frequency = val.i_int;
355 var_Create( p_demux, "v4l-fps", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
356 var_Get( p_demux, "v4l-fps", &val );
357 p_sys->f_fps = val.f_float;
359 var_Create( p_demux, "v4l-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
360 var_Get( p_demux, "v4l-width", &val );
361 p_sys->i_width = val.i_int;
363 var_Create( p_demux, "v4l-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
364 var_Get( p_demux, "v4l-height", &val );
365 p_sys->i_height = val.i_int;
367 p_sys->i_video_pts = -1;
369 var_Create( p_demux, "v4l-brightness", VLC_VAR_INTEGER |
371 var_Get( p_demux, "v4l-brightness", &val );
372 p_sys->i_brightness = val.i_int;
374 var_Create( p_demux, "v4l-hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
375 var_Get( p_demux, "v4l-hue", &val );
378 var_Create( p_demux, "v4l-colour", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
379 var_Get( p_demux, "v4l-colour", &val );
380 p_sys->i_colour = val.i_int;
382 var_Create( p_demux, "v4l-contrast", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
383 var_Get( p_demux, "v4l-contrast", &val );
384 p_sys->i_contrast = val.i_int;
386 var_Create( p_demux, "v4l-mjpeg", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
387 var_Get( p_demux, "v4l-mjpeg", &val );
388 p_sys->b_mjpeg = val.b_bool;
390 var_Create( p_demux, "v4l-decimation", VLC_VAR_INTEGER |
392 var_Get( p_demux, "v4l-decimation", &val );
393 p_sys->i_decimation = val.i_int;
395 var_Create( p_demux, "v4l-quality", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
396 var_Get( p_demux, "v4l-quality", &val );
397 p_sys->i_quality = val.i_int;
399 var_Create( p_demux, "v4l-samplerate",
400 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
401 var_Get( p_demux, "v4l-samplerate", &val );
402 p_sys->i_sample_rate = val.i_int;
404 var_Create( p_demux, "v4l-stereo", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
405 var_Get( p_demux, "v4l-stereo", &val );
406 p_sys->b_stereo = val.b_bool;
408 p_sys->psz_device = p_sys->psz_vdev = p_sys->psz_adev = NULL;
409 p_sys->fd_video = -1;
410 p_sys->fd_audio = -1;
412 p_sys->p_es_video = p_sys->p_es_audio = 0;
413 p_sys->p_block_audio = 0;
417 /* Find main device (video or audio) */
418 if( p_sys->psz_device && *p_sys->psz_device )
420 msg_Dbg( p_demux, "main device=`%s'", p_sys->psz_device );
422 /* Try to open as video device */
423 p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_device );
425 if( p_sys->fd_video < 0 )
427 /* Try to open as audio device */
428 p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_device );
429 if( p_sys->fd_audio >= 0 )
431 if( p_sys->psz_adev ) free( p_sys->psz_adev );
432 p_sys->psz_adev = p_sys->psz_device;
433 p_sys->psz_device = NULL;
438 if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
439 p_sys->psz_vdev = p_sys->psz_device;
440 p_sys->psz_device = NULL;
444 /* If no device opened, only continue if the access was forced */
445 if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
447 if( strcmp( p_demux->psz_access, "v4l" ) )
454 /* Find video device */
455 if( p_sys->fd_video < 0 )
457 if( !p_sys->psz_vdev || !*p_sys->psz_vdev )
459 if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
460 p_sys->psz_vdev = var_CreateGetString( p_demux, "v4l-vdev" );;
463 if( p_sys->psz_vdev && *p_sys->psz_vdev )
465 p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_vdev );
469 /* Find audio device */
470 if( p_sys->fd_audio < 0 )
472 if( !p_sys->psz_adev || !*p_sys->psz_adev )
474 if( p_sys->psz_adev ) free( p_sys->psz_adev );
475 p_sys->psz_adev = var_CreateGetString( p_demux, "v4l-adev" );;
478 if( p_sys->psz_adev && *p_sys->psz_adev )
480 p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_adev );
484 if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
490 msg_Dbg( p_demux, "v4l grabbing started" );
492 /* Declare elementary streams */
493 if( p_sys->fd_video >= 0 )
496 es_format_Init( &fmt, VIDEO_ES, p_sys->i_fourcc );
497 fmt.video.i_width = p_sys->i_width;
498 fmt.video.i_height = p_sys->i_height;
499 fmt.video.i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
501 /* Setup rgb mask for RGB formats */
502 if( p_sys->i_fourcc == VLC_FOURCC('R','V','2','4') )
504 /* This is in BGR format */
505 fmt.video.i_bmask = 0x00ff0000;
506 fmt.video.i_gmask = 0x0000ff00;
507 fmt.video.i_rmask = 0x000000ff;
510 msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
511 (char*)&fmt.i_codec, fmt.video.i_width, fmt.video.i_height );
512 p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
515 if( p_sys->fd_audio >= 0 )
518 es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC('a','r','a','w') );
520 fmt.audio.i_channels = p_sys->b_stereo ? 2 : 1;
521 fmt.audio.i_rate = p_sys->i_sample_rate;
522 fmt.audio.i_bitspersample = 16; // FIXME ?
523 fmt.audio.i_blockalign = fmt.audio.i_channels *
524 fmt.audio.i_bitspersample / 8;
525 fmt.i_bitrate = fmt.audio.i_channels * fmt.audio.i_rate *
526 fmt.audio.i_bitspersample;
528 msg_Dbg( p_demux, "new audio es %d channels %dHz",
529 fmt.audio.i_channels, fmt.audio.i_rate );
531 p_sys->p_es_audio = es_out_Add( p_demux->out, &fmt );
534 /* Update default_pts to a suitable value for access */
535 var_Create( p_demux, "v4l-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
540 /*****************************************************************************
541 * Close: close device, free resources
542 *****************************************************************************/
543 static void Close( vlc_object_t *p_this )
545 demux_t *p_demux = (demux_t *)p_this;
546 demux_sys_t *p_sys = p_demux->p_sys;
548 if( p_sys->psz_device ) free( p_sys->psz_device );
549 if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
550 if( p_sys->psz_adev ) free( p_sys->psz_adev );
551 if( p_sys->fd_video >= 0 ) close( p_sys->fd_video );
552 if( p_sys->fd_audio >= 0 ) close( p_sys->fd_audio );
553 if( p_sys->p_block_audio ) block_Release( p_sys->p_block_audio );
558 ioctl( p_sys->fd_video, MJPIOC_QBUF_CAPT, &i_noframe );
561 if( p_sys->p_video_mmap && p_sys->p_video_mmap != MAP_FAILED )
564 munmap( p_sys->p_video_mmap, p_sys->mjpeg_buffers.size *
565 p_sys->mjpeg_buffers.count );
567 munmap( p_sys->p_video_mmap, p_sys->vid_mbuf.size );
573 /*****************************************************************************
575 *****************************************************************************/
576 static int Control( demux_t *p_demux, int i_query, va_list args )
583 /* Special for access_demux */
584 case DEMUX_CAN_PAUSE:
585 case DEMUX_SET_PAUSE_STATE:
586 case DEMUX_CAN_CONTROL_PACE:
587 pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
591 case DEMUX_GET_PTS_DELAY:
592 pi64 = (int64_t*)va_arg( args, int64_t * );
593 *pi64 = (int64_t)var_GetInteger( p_demux, "v4l-caching" ) * 1000;
597 pi64 = (int64_t*)va_arg( args, int64_t * );
601 /* TODO implement others */
609 /*****************************************************************************
611 *****************************************************************************/
612 static int Demux( demux_t *p_demux )
614 demux_sys_t *p_sys = p_demux->p_sys;
615 es_out_id_t *p_es = p_sys->p_es_audio;
616 block_t *p_block = NULL;
618 /* Try grabbing audio frames first */
619 if( p_sys->fd_audio < 0 || !( p_block = GrabAudio( p_demux ) ) )
621 /* Try grabbing video frame */
622 p_es = p_sys->p_es_video;
623 if( p_sys->fd_video > 0 ) p_block = GrabVideo( p_demux );
628 /* Sleep so we do not consume all the cpu, 10ms seems
629 * like a good value (100fps) */
634 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
635 es_out_Send( p_demux->out, p_es, p_block );
640 /*****************************************************************************
641 * ParseMRL: parse the options contained in the MRL
642 *****************************************************************************/
643 static void ParseMRL( demux_t *p_demux )
645 demux_sys_t *p_sys = p_demux->p_sys;
647 char *psz_dup = strdup( p_demux->psz_path );
648 char *psz_parser = psz_dup;
650 while( *psz_parser && *psz_parser != ':' )
655 if( *psz_parser == ':' )
660 *psz_parser++ = '\0';
661 if( !strncmp( psz_parser, "channel=", strlen( "channel=" ) ) )
663 p_sys->i_channel = strtol( psz_parser + strlen( "channel=" ),
666 else if( !strncmp( psz_parser, "norm=", strlen( "norm=" ) ) )
668 psz_parser += strlen( "norm=" );
669 if( !strncmp( psz_parser, "pal", strlen( "pal" ) ) )
671 p_sys->i_norm = VIDEO_MODE_PAL;
672 psz_parser += strlen( "pal" );
674 else if( !strncmp( psz_parser, "ntsc", strlen( "ntsc" ) ) )
676 p_sys->i_norm = VIDEO_MODE_NTSC;
677 psz_parser += strlen( "ntsc" );
679 else if( !strncmp( psz_parser, "secam", strlen( "secam" ) ) )
681 p_sys->i_norm = VIDEO_MODE_SECAM;
682 psz_parser += strlen( "secam" );
684 else if( !strncmp( psz_parser, "auto", strlen( "auto" ) ) )
686 p_sys->i_norm = VIDEO_MODE_AUTO;
687 psz_parser += strlen( "auto" );
691 p_sys->i_norm = strtol( psz_parser, &psz_parser, 0 );
694 else if( !strncmp( psz_parser, "frequency=",
695 strlen( "frequency=" ) ) )
698 strtol( psz_parser + strlen( "frequency=" ),
700 if( p_sys->i_frequency < 30000 )
702 msg_Warn( p_demux, "v4l syntax has changed : "
703 "'frequency' is now channel frequency in kHz");
706 else if( !strncmp( psz_parser, "audio=", strlen( "audio=" ) ) )
708 p_sys->i_audio = strtol( psz_parser + strlen( "audio=" ),
711 else if( !strncmp( psz_parser, "size=", strlen( "size=" ) ) )
713 psz_parser += strlen( "size=" );
714 if( !strncmp( psz_parser, "subqcif", strlen( "subqcif" ) ) )
716 p_sys->i_width = 128;
717 p_sys->i_height = 96;
719 else if( !strncmp( psz_parser, "qsif", strlen( "qsif" ) ) )
721 p_sys->i_width = 160;
722 p_sys->i_height = 120;
724 else if( !strncmp( psz_parser, "qcif", strlen( "qcif" ) ) )
726 p_sys->i_width = 176;
727 p_sys->i_height = 144;
729 else if( !strncmp( psz_parser, "sif", strlen( "sif" ) ) )
731 p_sys->i_width = 320;
732 p_sys->i_height = 244;
734 else if( !strncmp( psz_parser, "cif", strlen( "cif" ) ) )
736 p_sys->i_width = 352;
737 p_sys->i_height = 288;
739 else if( !strncmp( psz_parser, "vga", strlen( "vga" ) ) )
741 p_sys->i_width = 640;
742 p_sys->i_height = 480;
747 p_sys->i_width = strtol( psz_parser, &psz_parser, 0 );
748 if( *psz_parser == 'x' || *psz_parser == 'X')
750 p_sys->i_height = strtol( psz_parser + 1,
753 msg_Dbg( p_demux, "WxH %dx%d", p_sys->i_width,
757 else if( !strncmp( psz_parser, "brightness=", strlen( "brightness=" ) ) )
759 p_sys->i_brightness = strtol( psz_parser + strlen( "brightness=" ),
762 else if( !strncmp( psz_parser, "colour=", strlen( "colour=" ) ) )
764 p_sys->i_colour = strtol( psz_parser + strlen( "colour=" ),
767 else if( !strncmp( psz_parser, "hue=", strlen( "hue=" ) ) )
769 p_sys->i_hue = strtol( psz_parser + strlen( "hue=" ),
772 else if( !strncmp( psz_parser, "contrast=", strlen( "contrast=" ) ) )
774 p_sys->i_contrast = strtol( psz_parser + strlen( "contrast=" ),
777 else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
779 p_sys->i_tuner = strtol( psz_parser + strlen( "tuner=" ),
782 else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) ) )
786 psz_parser += strlen( "adev=" );
787 if( strchr( psz_parser, ':' ) )
789 i_len = strchr( psz_parser, ':' ) - psz_parser;
793 i_len = strlen( psz_parser );
796 p_sys->psz_adev = strndup( psz_parser, i_len );
800 else if( !strncmp( psz_parser, "samplerate=",
801 strlen( "samplerate=" ) ) )
803 p_sys->i_sample_rate =
804 strtol( psz_parser + strlen( "samplerate=" ),
807 else if( !strncmp( psz_parser, "stereo", strlen( "stereo" ) ) )
809 psz_parser += strlen( "stereo" );
811 p_sys->b_stereo = VLC_TRUE;
813 else if( !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
815 psz_parser += strlen( "mono" );
817 p_sys->b_stereo = VLC_FALSE;
819 else if( !strncmp( psz_parser, "mjpeg", strlen( "mjpeg" ) ) )
821 psz_parser += strlen( "mjpeg" );
823 p_sys->b_mjpeg = VLC_TRUE;
825 else if( !strncmp( psz_parser, "decimation=",
826 strlen( "decimation=" ) ) )
828 p_sys->i_decimation =
829 strtol( psz_parser + strlen( "decimation=" ),
832 else if( !strncmp( psz_parser, "quality=",
833 strlen( "quality=" ) ) )
836 strtol( psz_parser + strlen( "quality=" ),
839 else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
841 p_sys->f_fps = strtof( psz_parser + strlen( "fps=" ),
846 msg_Warn( p_demux, "unknown option" );
849 while( *psz_parser && *psz_parser != ':' )
854 if( *psz_parser == '\0' )
863 p_sys->psz_device = strdup( psz_dup );
865 if( psz_dup ) free( psz_dup );
868 /*****************************************************************************
870 *****************************************************************************/
871 static int OpenVideoDev( demux_t *p_demux, char *psz_device )
873 demux_sys_t *p_sys = p_demux->p_sys;
876 struct video_channel vid_channel;
877 struct mjpeg_params mjpeg;
880 if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
882 msg_Err( p_demux, "cannot open device (%s)", strerror( errno ) );
886 if( ioctl( i_fd, VIDIOCGCAP, &p_sys->vid_cap ) < 0 )
888 msg_Err( p_demux, "cannot get capabilities (%s)", strerror( errno ) );
893 "V4L device %s %d channels %d audios %d < w < %d %d < h < %d",
895 p_sys->vid_cap.channels,
896 p_sys->vid_cap.audios,
897 p_sys->vid_cap.minwidth, p_sys->vid_cap.maxwidth,
898 p_sys->vid_cap.minheight, p_sys->vid_cap.maxheight );
900 if( p_sys->i_channel < 0 || p_sys->i_channel >= p_sys->vid_cap.channels )
902 msg_Dbg( p_demux, "invalid channel, falling back on channel 0" );
903 p_sys->i_channel = 0;
905 if( p_sys->vid_cap.audios && p_sys->i_audio >= p_sys->vid_cap.audios )
907 msg_Dbg( p_demux, "invalid audio, falling back with no audio" );
911 if( p_sys->i_width < p_sys->vid_cap.minwidth ||
912 p_sys->i_width > p_sys->vid_cap.maxwidth )
914 msg_Dbg( p_demux, "invalid width %i", p_sys->i_width );
917 if( p_sys->i_height < p_sys->vid_cap.minheight ||
918 p_sys->i_height > p_sys->vid_cap.maxheight )
920 msg_Dbg( p_demux, "invalid height %i", p_sys->i_height );
924 if( !( p_sys->vid_cap.type & VID_TYPE_CAPTURE ) )
926 msg_Err( p_demux, "cannot grab" );
930 vid_channel.channel = p_sys->i_channel;
931 if( ioctl( i_fd, VIDIOCGCHAN, &vid_channel ) < 0 )
933 msg_Err( p_demux, "cannot get channel infos (%s)",
938 "setting channel %s(%d) %d tuners flags=0x%x type=0x%x norm=0x%x",
939 vid_channel.name, vid_channel.channel, vid_channel.tuners,
940 vid_channel.flags, vid_channel.type, vid_channel.norm );
942 if( p_sys->i_tuner >= vid_channel.tuners )
944 msg_Dbg( p_demux, "invalid tuner, falling back on tuner 0" );
948 vid_channel.norm = p_sys->i_norm;
949 if( ioctl( i_fd, VIDIOCSCHAN, &vid_channel ) < 0 )
951 msg_Err( p_demux, "cannot set channel (%s)", strerror( errno ) );
955 if( vid_channel.flags & VIDEO_VC_TUNER )
960 struct video_tuner vid_tuner;
961 if( p_sys->i_tuner >= 0 )
963 vid_tuner.tuner = p_sys->i_tuner;
964 if( ioctl( i_fd, VIDIOCGTUNER, &vid_tuner ) < 0 )
966 msg_Err( p_demux, "cannot get tuner (%s)", strerror( errno ) );
969 msg_Dbg( p_demux, "tuner %s low=%d high=%d, flags=0x%x "
970 "mode=0x%x signal=0x%x",
971 vid_tuner.name, vid_tuner.rangelow, vid_tuner.rangehigh,
972 vid_tuner.flags, vid_tuner.mode, vid_tuner.signal );
974 msg_Dbg( p_demux, "setting tuner %s (%d)",
975 vid_tuner.name, vid_tuner.tuner );
977 /* FIXME FIXME to be checked FIXME FIXME */
978 //vid_tuner.mode = p_sys->i_norm;
979 if( ioctl( i_fd, VIDIOCSTUNER, &vid_tuner ) < 0 )
981 msg_Err( p_demux, "cannot set tuner (%s)", strerror( errno ) );
987 /* Show a warning if frequency is < than 30000.
988 * User is certainly usint old syntax. */
992 if( p_sys->i_frequency >= 0 )
994 int driver_frequency = p_sys->i_frequency * 16 /1000;
995 if( ioctl( i_fd, VIDIOCSFREQ, &driver_frequency ) < 0 )
997 msg_Err( p_demux, "cannot set frequency (%s)",
1001 msg_Dbg( p_demux, "frequency %d (%d)", p_sys->i_frequency,
1007 if( vid_channel.flags & VIDEO_VC_AUDIO )
1009 struct video_audio vid_audio;
1011 /* XXX TODO volume, balance, ... */
1012 if( p_sys->i_audio >= 0 )
1014 vid_audio.audio = p_sys->i_audio;
1015 if( ioctl( i_fd, VIDIOCGAUDIO, &vid_audio ) < 0 )
1017 msg_Err( p_demux, "cannot get audio (%s)", strerror( errno ) );
1022 vid_audio.flags &= ~VIDEO_AUDIO_MUTE;
1024 if( ioctl( i_fd, VIDIOCSAUDIO, &vid_audio ) < 0 )
1026 msg_Err( p_demux, "cannot set audio (%s)", strerror( errno ) );
1033 /* establish basic params with input and norm before feeling width
1035 if( p_sys->b_mjpeg )
1037 struct quicktime_mjpeg_app1 *p_app1;
1040 if( ioctl( i_fd, MJPIOC_G_PARAMS, &mjpeg ) < 0 )
1042 msg_Err( p_demux, "cannot get mjpeg params (%s)",
1043 strerror( errno ) );
1046 mjpeg.input = p_sys->i_channel;
1047 mjpeg.norm = p_sys->i_norm;
1048 mjpeg.decimation = p_sys->i_decimation;
1050 if( p_sys->i_width )
1051 mjpeg.img_width = p_sys->i_width / p_sys->i_decimation;
1052 if( p_sys->i_height )
1053 mjpeg.img_height = p_sys->i_height / p_sys->i_decimation;
1055 /* establish Quicktime APP1 marker while we are here */
1060 p_app1 = (struct quicktime_mjpeg_app1 *)mjpeg.APP_data;
1061 p_app1->i_reserved = 0;
1062 p_app1->i_tag = VLC_FOURCC( 'm','j','p','g' );
1063 p_app1->i_field_size = 0;
1064 p_app1->i_padded_field_size = 0;
1065 p_app1->i_next_field = 0;
1066 /* XXX WARNING XXX */
1067 /* these's nothing magic about these values. We are dangerously
1068 * assuming the encoder card is encoding mjpeg-a and is not throwing
1069 * in marker tags we aren't expecting. It's bad enough we have to
1070 * search through the jpeg output for every frame we grab just to
1071 * find the first field's end marker, so we take this risk to boost
1073 * This is really something the driver could do for us because this
1074 * does conform to standards outside of Apple Quicktime.
1077 p_app1->i_DQT_offset = hton32( i_offset );
1079 p_app1->i_DHT_offset = hton32( i_offset );
1081 p_app1->i_SOF_offset = hton32( i_offset );
1083 p_app1->i_SOS_offset = hton32( i_offset );
1085 p_app1->i_data_offset = hton32( i_offset );
1087 /* SOF and SOS aren't specified by the mjpeg API because they aren't
1088 * optional. They will be present in the output. */
1089 mjpeg.jpeg_markers = JPEG_MARKER_DHT | JPEG_MARKER_DQT;
1091 if( ioctl( i_fd, MJPIOC_S_PARAMS, &mjpeg ) < 0 )
1093 msg_Err( p_demux, "cannot set mjpeg params (%s)",
1094 strerror( errno ) );
1098 p_sys->i_width = mjpeg.img_width * mjpeg.HorDcm;
1099 p_sys->i_height = mjpeg.img_height * mjpeg.VerDcm *
1100 mjpeg.field_per_buff;
1103 /* fix width/height */
1104 if( !p_sys->b_mjpeg && ( p_sys->i_width == 0 || p_sys->i_height == 0 ) )
1106 struct video_window vid_win;
1108 if( ioctl( i_fd, VIDIOCGWIN, &vid_win ) < 0 )
1110 msg_Err( p_demux, "cannot get win (%s)", strerror( errno ) );
1113 p_sys->i_width = vid_win.width;
1114 p_sys->i_height = vid_win.height;
1116 if( !p_sys->i_width || !p_sys->i_height )
1118 p_sys->i_width = p_sys->vid_cap.maxwidth;
1119 p_sys->i_height = p_sys->vid_cap.maxheight;
1122 if( !p_sys->i_width || !p_sys->i_height )
1124 msg_Err( p_demux, "invalid video size (%ix%i)",
1125 p_sys->i_width, p_sys->i_height );
1129 msg_Dbg( p_demux, "will use %dx%d", p_sys->i_width, p_sys->i_height );
1132 if( !p_sys->b_mjpeg )
1134 /* set hue/color/.. */
1135 if( ioctl( i_fd, VIDIOCGPICT, &p_sys->vid_picture ) == 0 )
1137 struct video_picture vid_picture = p_sys->vid_picture;
1139 if( p_sys->i_brightness >= 0 && p_sys->i_brightness < 65536 )
1141 vid_picture.brightness = p_sys->i_brightness;
1143 if( p_sys->i_colour >= 0 && p_sys->i_colour < 65536 )
1145 vid_picture.colour = p_sys->i_colour;
1147 if( p_sys->i_hue >= 0 && p_sys->i_hue < 65536 )
1149 vid_picture.hue = p_sys->i_hue;
1151 if( p_sys->i_contrast >= 0 && p_sys->i_contrast < 65536 )
1153 vid_picture.contrast = p_sys->i_contrast;
1155 if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1157 msg_Dbg( p_demux, "v4l device uses brightness: %d",
1158 vid_picture.brightness );
1159 msg_Dbg( p_demux, "v4l device uses colour: %d",
1160 vid_picture.colour );
1161 msg_Dbg( p_demux, "v4l device uses hue: %d", vid_picture.hue );
1162 msg_Dbg( p_demux, "v4l device uses contrast: %d",
1163 vid_picture.contrast );
1164 p_sys->vid_picture = vid_picture;
1168 /* Find out video format used by device */
1169 if( ioctl( i_fd, VIDIOCGPICT, &p_sys->vid_picture ) == 0 )
1171 struct video_picture vid_picture = p_sys->vid_picture;
1175 p_sys->i_fourcc = 0;
1177 psz = var_CreateGetString( p_demux, "v4l-chroma" );
1178 if( strlen( psz ) >= 4 )
1180 vid_picture.palette = 0;
1181 int i_chroma = VLC_FOURCC( psz[0], psz[1], psz[2], psz[3] );
1183 /* Find out v4l chroma code */
1184 for( i = 0; v4lchroma_to_fourcc[i].i_v4l != 0; i++ )
1186 if( v4lchroma_to_fourcc[i].i_fourcc == i_chroma )
1188 vid_picture.palette = v4lchroma_to_fourcc[i].i_v4l;
1195 if( vid_picture.palette &&
1196 !ioctl( i_fd, VIDIOCSPICT, &vid_picture ) )
1198 p_sys->vid_picture = vid_picture;
1202 /* Try to set the format to something easy to encode */
1203 vid_picture.palette = VIDEO_PALETTE_YUV420P;
1204 if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1206 p_sys->vid_picture = vid_picture;
1210 vid_picture.palette = VIDEO_PALETTE_YUV422P;
1211 if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1213 p_sys->vid_picture = vid_picture;
1218 /* Find out final format */
1219 for( i = 0; v4lchroma_to_fourcc[i].i_v4l != 0; i++ )
1221 if( v4lchroma_to_fourcc[i].i_v4l == p_sys->vid_picture.palette)
1223 p_sys->i_fourcc = v4lchroma_to_fourcc[i].i_fourcc;
1230 msg_Err( p_demux, "ioctl VIDIOCGPICT failed" );
1235 if( p_sys->b_mjpeg )
1239 p_sys->mjpeg_buffers.count = 8;
1240 p_sys->mjpeg_buffers.size = MJPEG_BUFFER_SIZE;
1242 if( ioctl( i_fd, MJPIOC_REQBUFS, &p_sys->mjpeg_buffers ) < 0 )
1244 msg_Err( p_demux, "mmap unsupported" );
1248 p_sys->p_video_mmap = mmap( 0,
1249 p_sys->mjpeg_buffers.size * p_sys->mjpeg_buffers.count,
1250 PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, 0 );
1251 if( p_sys->p_video_mmap == MAP_FAILED )
1253 msg_Err( p_demux, "mmap failed" );
1257 p_sys->i_fourcc = VLC_FOURCC( 'm','j','p','g' );
1258 p_sys->i_frame_pos = -1;
1260 /* queue up all the frames */
1261 for( i = 0; i < (int)p_sys->mjpeg_buffers.count; i++ )
1263 if( ioctl( i_fd, MJPIOC_QBUF_CAPT, &i ) < 0 )
1265 msg_Err( p_demux, "unable to queue frame" );
1272 /* Fill in picture_t fields */
1273 vout_InitPicture( VLC_OBJECT(p_demux), &p_sys->pic, p_sys->i_fourcc,
1274 p_sys->i_width, p_sys->i_height, p_sys->i_width *
1275 VOUT_ASPECT_FACTOR / p_sys->i_height );
1276 if( !p_sys->pic.i_planes )
1278 msg_Err( p_demux, "unsupported chroma" );
1281 p_sys->i_video_frame_size = 0;
1282 for( i = 0; i < p_sys->pic.i_planes; i++ )
1284 p_sys->i_video_frame_size += p_sys->pic.p[i].i_visible_lines *
1285 p_sys->pic.p[i].i_visible_pitch;
1288 msg_Dbg( p_demux, "v4l device uses frame size: %i",
1289 p_sys->i_video_frame_size );
1290 msg_Dbg( p_demux, "v4l device uses chroma: %4.4s",
1291 (char*)&p_sys->i_fourcc );
1293 /* Allocate mmap buffer */
1294 if( ioctl( i_fd, VIDIOCGMBUF, &p_sys->vid_mbuf ) < 0 )
1296 msg_Err( p_demux, "mmap unsupported" );
1300 p_sys->p_video_mmap = mmap( 0, p_sys->vid_mbuf.size,
1301 PROT_READ|PROT_WRITE, MAP_SHARED,
1303 if( p_sys->p_video_mmap == MAP_FAILED )
1305 /* FIXME -> normal read */
1306 msg_Err( p_demux, "mmap failed" );
1311 p_sys->vid_mmap.frame = 0;
1312 p_sys->vid_mmap.width = p_sys->i_width;
1313 p_sys->vid_mmap.height = p_sys->i_height;
1314 p_sys->vid_mmap.format = p_sys->vid_picture.palette;
1315 if( ioctl( i_fd, VIDIOCMCAPTURE, &p_sys->vid_mmap ) < 0 )
1317 msg_Warn( p_demux, "%4.4s refused", (char*)&p_sys->i_fourcc );
1318 msg_Err( p_demux, "chroma selection failed" );
1326 if( i_fd >= 0 ) close( i_fd );
1330 /*****************************************************************************
1332 *****************************************************************************/
1333 static int OpenAudioDev( demux_t *p_demux, char *psz_device )
1335 demux_sys_t *p_sys = p_demux->p_sys;
1338 if( (i_fd = open( psz_device, O_RDONLY | O_NONBLOCK )) < 0 )
1340 msg_Err( p_demux, "cannot open audio device (%s)", strerror( errno ) );
1344 i_format = AFMT_S16_LE;
1345 if( ioctl( i_fd, SNDCTL_DSP_SETFMT, &i_format ) < 0
1346 || i_format != AFMT_S16_LE )
1348 msg_Err( p_demux, "cannot set audio format (16b little endian) "
1349 "(%s)", strerror( errno ) );
1353 if( ioctl( i_fd, SNDCTL_DSP_STEREO,
1354 &p_sys->b_stereo ) < 0 )
1356 msg_Err( p_demux, "cannot set audio channels count (%s)",
1357 strerror( errno ) );
1361 if( ioctl( i_fd, SNDCTL_DSP_SPEED,
1362 &p_sys->i_sample_rate ) < 0 )
1364 msg_Err( p_demux, "cannot set audio sample rate (%s)",
1365 strerror( errno ) );
1369 msg_Dbg( p_demux, "openened adev=`%s' %s %dHz",
1370 psz_device, p_sys->b_stereo ? "stereo" : "mono",
1371 p_sys->i_sample_rate );
1373 p_sys->i_audio_max_frame_size = 6 * 1024;
1379 if( i_fd >= 0 ) close( i_fd );
1383 /*****************************************************************************
1384 * GrabAudio: grab audio
1385 *****************************************************************************/
1386 static block_t *GrabAudio( demux_t *p_demux )
1388 demux_sys_t *p_sys = p_demux->p_sys;
1389 struct audio_buf_info buf_info;
1390 int i_read, i_correct;
1393 if( p_sys->p_block_audio ) p_block = p_sys->p_block_audio;
1394 else p_block = block_New( p_demux, p_sys->i_audio_max_frame_size );
1398 msg_Warn( p_demux, "cannot get block" );
1402 p_sys->p_block_audio = p_block;
1404 i_read = read( p_sys->fd_audio, p_block->p_buffer,
1405 p_sys->i_audio_max_frame_size );
1407 if( i_read <= 0 ) return 0;
1409 p_block->i_buffer = i_read;
1410 p_sys->p_block_audio = 0;
1412 /* Correct the date because of kernel buffering */
1414 if( ioctl( p_sys->fd_audio, SNDCTL_DSP_GETISPACE, &buf_info ) == 0 )
1416 i_correct += buf_info.bytes;
1419 p_block->i_pts = p_block->i_dts =
1420 mdate() - I64C(1000000) * (mtime_t)i_correct /
1421 2 / ( p_sys->b_stereo ? 2 : 1) / p_sys->i_sample_rate;
1426 /*****************************************************************************
1428 *****************************************************************************/
1429 static uint8_t *GrabCapture( demux_t *p_demux )
1431 demux_sys_t *p_sys = p_demux->p_sys;
1432 int i_captured_frame = p_sys->i_frame_pos;
1434 p_sys->vid_mmap.frame = (p_sys->i_frame_pos + 1) % p_sys->vid_mbuf.frames;
1436 while( ioctl( p_sys->fd_video, VIDIOCMCAPTURE, &p_sys->vid_mmap ) < 0 )
1438 if( errno != EAGAIN )
1440 msg_Err( p_demux, "failed capturing new frame" );
1444 if( p_demux->b_die )
1449 msg_Dbg( p_demux, "grab failed, trying again" );
1452 while( ioctl(p_sys->fd_video, VIDIOCSYNC, &p_sys->i_frame_pos) < 0 )
1454 if( errno != EAGAIN && errno != EINTR )
1456 msg_Err( p_demux, "failed syncing new frame" );
1461 p_sys->i_frame_pos = p_sys->vid_mmap.frame;
1462 /* leave i_video_frame_size alone */
1463 return p_sys->p_video_mmap + p_sys->vid_mbuf.offsets[i_captured_frame];
1466 static uint8_t *GrabMJPEG( demux_t *p_demux )
1468 demux_sys_t *p_sys = p_demux->p_sys;
1469 struct mjpeg_sync sync;
1470 uint8_t *p_frame, *p_field, *p;
1473 struct quicktime_mjpeg_app1 *p_app1 = NULL;
1475 /* re-queue the last frame we sync'd */
1476 if( p_sys->i_frame_pos != -1 )
1478 while( ioctl( p_sys->fd_video, MJPIOC_QBUF_CAPT,
1479 &p_sys->i_frame_pos ) < 0 )
1481 if( errno != EAGAIN && errno != EINTR )
1483 msg_Err( p_demux, "failed capturing new frame" );
1489 /* sync on the next frame */
1490 while( ioctl( p_sys->fd_video, MJPIOC_SYNC, &sync ) < 0 )
1492 if( errno != EAGAIN && errno != EINTR )
1494 msg_Err( p_demux, "failed syncing new frame" );
1499 p_sys->i_frame_pos = sync.frame;
1500 p_frame = p_sys->p_video_mmap + p_sys->mjpeg_buffers.size * sync.frame;
1502 /* p_frame now points to the data. fix up the Quicktime APP1 marker */
1504 tag = hton16( tag );
1508 p = memmem( p_field, sync.length, &tag, 2 );
1512 p += 2; /* data immediately following EOI */
1514 p_app1 = (struct quicktime_mjpeg_app1 *)(p_field + 6);
1516 i_size = ((uint32_t)(p - p_field));
1517 i_size = hton32( i_size );
1518 memcpy( &p_app1->i_field_size, &i_size, 4 );
1520 while( *p == 0xff && *(p+1) == 0xff )
1523 i_size = ((uint32_t)(p - p_field));
1524 i_size = hton32( i_size );
1525 memcpy( &p_app1->i_padded_field_size, &i_size, 4 );
1529 tag = hton16( tag );
1530 p_field = memmem( p, sync.length - (size_t)(p - p_frame), &tag, 2 );
1534 i_size = (uint32_t)(p_field - p_frame);
1535 i_size = hton32( i_size );
1536 memcpy( &p_app1->i_next_field, &i_size, 4 );
1539 p_app1 = (struct quicktime_mjpeg_app1 *)(p_field + 6);
1541 tag = hton16( tag );
1542 p = memmem( p_field, sync.length - (size_t)(p_field - p_frame),
1547 /* sometimes the second field doesn't have the EOI. just put it
1550 p = p_frame + sync.length;
1551 memcpy( p, &tag, 2 );
1556 i_size = (uint32_t)(p - p_field);
1557 i_size = hton32( i_size );
1558 memcpy( &p_app1->i_field_size, &i_size, 4 );
1559 i_size = (uint32_t)(sync.length - (uint32_t)(p_field - p_frame));
1560 i_size = hton32( i_size );
1561 memcpy( &p_app1->i_padded_field_size, &i_size, 4 );
1564 p_sys->i_video_frame_size = sync.length;
1568 static block_t *GrabVideo( demux_t *p_demux )
1570 demux_sys_t *p_sys = p_demux->p_sys;
1574 if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
1576 mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
1578 /* Did we wait long enough ? (frame rate reduction) */
1579 if( p_sys->i_video_pts + i_dur > mdate() ) return 0;
1582 if( p_sys->b_mjpeg ) p_frame = GrabMJPEG( p_demux );
1583 else p_frame = GrabCapture( p_demux );
1585 if( !p_frame ) return 0;
1587 if( !( p_block = block_New( p_demux, p_sys->i_video_frame_size ) ) )
1589 msg_Warn( p_demux, "cannot get block" );
1593 memcpy( p_block->p_buffer, p_frame, p_sys->i_video_frame_size );
1594 p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();