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 *****************************************************************************/
36 #include <vlc_input.h>
37 #include <vlc_demux.h>
38 #include <vlc_access.h>
40 #include <vlc_codecs.h>
42 #include <sys/types.h>
44 #include <sys/ioctl.h>
50 /* From GStreamer's v4l plugin:
51 * Because of some really cool feature in video4linux1, also known as
52 * 'not including sys/types.h and sys/time.h', we had to include it
53 * ourselves. In all their intelligence, these people decided to fix
54 * this in the next version (video4linux2) in such a cool way that it
55 * breaks all compilations of old stuff...
56 * The real problem is actually that linux/time.h doesn't use proper
57 * macro checks before defining types like struct timeval. The proper
58 * fix here is to either fuck the kernel header (which is what we do
59 * by defining _LINUX_TIME_H, an innocent little hack) or by fixing it
60 * upstream, which I'll consider doing later on. If you get compiler
61 * errors here, check your linux/time.h && sys/time.h header setup.
65 #include <linux/videodev.h>
66 #include "videodev_mjpeg.h"
68 #include <sys/soundcard.h>
70 /*****************************************************************************
72 *****************************************************************************/
73 static int Open ( vlc_object_t * );
74 static void Close( vlc_object_t * );
76 #define CACHING_TEXT N_("Caching value in ms")
77 #define CACHING_LONGTEXT N_( \
78 "Caching value for V4L captures. This " \
79 "value should be set in milliseconds." )
80 #define VDEV_TEXT N_("Video device name")
81 #define VDEV_LONGTEXT N_( \
82 "Name of the video device to use. " \
83 "If you don't specify anything, no video device will be used.")
84 #define ADEV_TEXT N_("Audio device name")
85 #define ADEV_LONGTEXT N_( \
86 "Name of the audio device to use. " \
87 "If you don't specify anything, no audio device will be used.")
88 #define CHROMA_TEXT N_("Video input chroma format")
89 #define CHROMA_LONGTEXT N_( \
90 "Force the Video4Linux video device to use a specific chroma format " \
91 "(eg. I420 (default), RV24, etc.)")
92 #define FREQUENCY_TEXT N_( "Frequency" )
93 #define FREQUENCY_LONGTEXT N_( \
94 "Frequency to capture (in kHz), if applicable." )
95 #define CHANNEL_TEXT N_( "Channel" )
96 #define CHANNEL_LONGTEXT N_( \
97 "Channel of the card to use (Usually, 0 = tuner, " \
98 "1 = composite, 2 = svideo)." )
99 #define NORM_TEXT N_( "Norm" )
100 #define NORM_LONGTEXT N_( \
101 "Norm of the stream (Automatic, SECAM, PAL, or NTSC)." )
102 #define AUDIO_TEXT N_( "Audio Channel" )
103 #define AUDIO_LONGTEXT N_( \
104 "Audio Channel to use, if there are several audio inputs." )
105 #define WIDTH_TEXT N_( "Width" )
106 #define WIDTH_LONGTEXT N_( "Width of the stream to capture " \
107 "(-1 for autodetect)." )
108 #define HEIGHT_TEXT N_( "Height" )
109 #define HEIGHT_LONGTEXT N_( "Height of the stream to capture " \
110 "(-1 for autodetect)." )
111 #define BRIGHTNESS_TEXT N_( "Brightness" )
112 #define BRIGHTNESS_LONGTEXT N_( \
113 "Brightness of the video input." )
114 #define HUE_TEXT N_( "Hue" )
115 #define HUE_LONGTEXT N_( \
116 "Hue of the video input." )
117 #define COLOUR_TEXT N_( "Color" )
118 #define COLOUR_LONGTEXT N_( \
119 "Color of the video input." )
120 #define CONTRAST_TEXT N_( "Contrast" )
121 #define CONTRAST_LONGTEXT N_( \
122 "Contrast of the video input." )
123 #define TUNER_TEXT N_( "Tuner" )
124 #define TUNER_LONGTEXT N_( "Tuner to use, if there are several ones." )
125 #define SAMPLERATE_TEXT N_( "Samplerate" )
126 #define SAMPLERATE_LONGTEXT N_( \
127 "Samplerate of the captured audio stream, in Hz (eg: 11025, 22050, 44100)" )
128 #define STEREO_TEXT N_( "Stereo" )
129 #define STEREO_LONGTEXT N_( \
130 "Capture the audio stream in stereo." )
131 #define MJPEG_TEXT N_( "MJPEG" )
132 #define MJPEG_LONGTEXT N_( \
133 "Set this option if the capture device outputs MJPEG" )
134 #define DECIMATION_TEXT N_( "Decimation" )
135 #define DECIMATION_LONGTEXT N_( \
136 "Decimation level for MJPEG streams" )
137 #define QUALITY_TEXT N_( "Quality" )
138 #define QUALITY_LONGTEXT N_( "Quality of the stream." )
139 #define FPS_TEXT N_( "Framerate" )
140 #define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
141 "(-1 for autodetect)." )
143 static int i_norm_list[] =
144 { VIDEO_MODE_AUTO, VIDEO_MODE_SECAM, VIDEO_MODE_PAL, VIDEO_MODE_NTSC };
145 static const char *psz_norm_list_text[] =
146 { N_("Automatic"), N_("SECAM"), N_("PAL"), N_("NTSC") };
149 set_shortname( _("Video4Linux") );
150 set_description( _("Video4Linux input") );
151 set_category( CAT_INPUT );
152 set_subcategory( SUBCAT_INPUT_ACCESS );
154 add_integer( "v4l-caching", DEFAULT_PTS_DELAY / 1000, NULL,
155 CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
156 add_string( "v4l-vdev", "/dev/video", 0, VDEV_TEXT, VDEV_LONGTEXT,
158 add_string( "v4l-adev", "/dev/dsp", 0, ADEV_TEXT, ADEV_LONGTEXT,
160 add_string( "v4l-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
162 add_float( "v4l-fps", -1.0, NULL, FPS_TEXT, FPS_LONGTEXT, VLC_TRUE );
163 add_integer( "v4l-samplerate", 44100, NULL, SAMPLERATE_TEXT,
164 SAMPLERATE_LONGTEXT, VLC_TRUE );
165 add_integer( "v4l-channel", 0, NULL, CHANNEL_TEXT, CHANNEL_LONGTEXT,
167 add_integer( "v4l-tuner", -1, NULL, TUNER_TEXT, TUNER_LONGTEXT, VLC_TRUE );
168 add_integer( "v4l-norm", VIDEO_MODE_AUTO, NULL, NORM_TEXT, NORM_LONGTEXT,
170 change_integer_list( i_norm_list, psz_norm_list_text, 0 );
171 add_integer( "v4l-frequency", -1, NULL, FREQUENCY_TEXT, FREQUENCY_LONGTEXT,
173 add_integer( "v4l-audio", -1, NULL, AUDIO_TEXT, AUDIO_LONGTEXT, VLC_TRUE );
174 add_bool( "v4l-stereo", VLC_TRUE, NULL, STEREO_TEXT, STEREO_LONGTEXT,
176 add_integer( "v4l-width", 0, NULL, WIDTH_TEXT, WIDTH_LONGTEXT, VLC_TRUE );
177 add_integer( "v4l-height", 0, NULL, HEIGHT_TEXT, HEIGHT_LONGTEXT,
179 add_integer( "v4l-brightness", -1, NULL, BRIGHTNESS_TEXT,
180 BRIGHTNESS_LONGTEXT, VLC_TRUE );
181 add_integer( "v4l-colour", -1, NULL, COLOUR_TEXT, COLOUR_LONGTEXT,
183 add_integer( "v4l-hue", -1, NULL, HUE_TEXT, HUE_LONGTEXT, VLC_TRUE );
184 add_integer( "v4l-contrast", -1, NULL, CONTRAST_TEXT, CONTRAST_LONGTEXT,
186 add_bool( "v4l-mjpeg", VLC_FALSE, NULL, MJPEG_TEXT, MJPEG_LONGTEXT,
188 add_integer( "v4l-decimation", 1, NULL, DECIMATION_TEXT,
189 DECIMATION_LONGTEXT, VLC_TRUE );
190 add_integer( "v4l-quality", 100, NULL, QUALITY_TEXT, QUALITY_LONGTEXT,
193 add_shortcut( "v4l" );
194 set_capability( "access_demux", 10 );
195 set_callbacks( Open, Close );
198 /*****************************************************************************
199 * Access: local prototypes
200 *****************************************************************************/
201 static int Demux ( demux_t * );
202 static int Control( demux_t *, int, va_list );
204 static void ParseMRL ( demux_t * );
205 static int OpenVideoDev( demux_t *, char * );
206 static int OpenAudioDev( demux_t *, char * );
208 static block_t *GrabAudio( demux_t * );
209 static block_t *GrabVideo( demux_t * );
211 #define MJPEG_BUFFER_SIZE (256*1024)
213 struct quicktime_mjpeg_app1
215 uint32_t i_reserved; /* set to 0 */
216 uint32_t i_tag; /* 'mjpg' */
217 uint32_t i_field_size; /* offset following EOI */
218 uint32_t i_padded_field_size; /* offset following EOI+pad */
219 uint32_t i_next_field; /* offset to next field */
220 uint32_t i_DQT_offset;
221 uint32_t i_DHT_offset;
222 uint32_t i_SOF_offset;
223 uint32_t i_SOS_offset;
224 uint32_t i_data_offset; /* following SOS marker data */
232 } v4lchroma_to_fourcc[] =
234 { VIDEO_PALETTE_GREY, VLC_FOURCC( 'G', 'R', 'E', 'Y' ) },
235 { VIDEO_PALETTE_HI240, VLC_FOURCC( 'I', '2', '4', '0' ) },
236 { VIDEO_PALETTE_RGB565, VLC_FOURCC( 'R', 'V', '1', '6' ) },
237 { VIDEO_PALETTE_RGB555, VLC_FOURCC( 'R', 'V', '1', '5' ) },
238 { VIDEO_PALETTE_RGB24, VLC_FOURCC( 'R', 'V', '2', '4' ) },
239 { VIDEO_PALETTE_RGB32, VLC_FOURCC( 'R', 'V', '3', '2' ) },
240 { VIDEO_PALETTE_YUV422, VLC_FOURCC( 'Y', 'U', 'Y', '2' ) },
241 { VIDEO_PALETTE_YUV422, VLC_FOURCC( 'Y', 'U', 'Y', 'V' ) },
242 { VIDEO_PALETTE_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', '2' ) },
243 { VIDEO_PALETTE_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', 'V' ) },
244 { VIDEO_PALETTE_UYVY, VLC_FOURCC( 'U', 'Y', 'V', 'Y' ) },
245 { VIDEO_PALETTE_YUV420, VLC_FOURCC( 'I', '4', '2', 'N' ) },
246 { VIDEO_PALETTE_YUV411, VLC_FOURCC( 'I', '4', '1', 'N' ) },
247 { VIDEO_PALETTE_RAW, VLC_FOURCC( 'G', 'R', 'A', 'W' ) },
248 { VIDEO_PALETTE_YUV422P, VLC_FOURCC( 'I', '4', '2', '2' ) },
249 { VIDEO_PALETTE_YUV420P, VLC_FOURCC( 'I', '4', '2', '0' ) },
250 { VIDEO_PALETTE_YUV411P, VLC_FOURCC( 'I', '4', '1', '1' ) },
257 char *psz_device; /* Main device from MRL, can be video or audio */
265 /* Video properties */
282 float f_fps; /* <= 0.0 mean to grab at full rate */
283 mtime_t i_video_pts; /* only used when f_fps > 0 */
289 struct video_capability vid_cap;
290 struct video_mbuf vid_mbuf;
291 struct mjpeg_requestbuffers mjpeg_buffers;
293 uint8_t *p_video_mmap;
296 struct video_mmap vid_mmap;
297 struct video_picture vid_picture;
299 int i_video_frame_size;
300 es_out_id_t *p_es_video;
302 /* Audio properties */
303 vlc_fourcc_t i_acodec_raw;
306 int i_audio_max_frame_size;
307 block_t *p_block_audio;
308 es_out_id_t *p_es_audio;
311 /*****************************************************************************
312 * Open: opens v4l device
313 *****************************************************************************
315 * url: <video device>::::
317 *****************************************************************************/
318 static int Open( vlc_object_t *p_this )
320 demux_t *p_demux = (demux_t*)p_this;
324 /* Only when selected */
325 if( *p_demux->psz_access == '\0' )
329 p_demux->pf_demux = Demux;
330 p_demux->pf_control = Control;
331 p_demux->info.i_update = 0;
332 p_demux->info.i_title = 0;
333 p_demux->info.i_seekpoint = 0;
334 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
335 memset( p_sys, 0, sizeof( demux_sys_t ) );
337 var_Create( p_demux, "v4l-audio", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
338 var_Get( p_demux, "v4l-audio", &val );
339 p_sys->i_audio = val.i_int;
341 var_Create( p_demux, "v4l-channel", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
342 var_Get( p_demux, "v4l-channel", &val );
343 p_sys->i_channel = val.i_int;
345 var_Create( p_demux, "v4l-norm", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
346 var_Get( p_demux, "v4l-norm", &val );
347 p_sys->i_norm = val.i_int;
349 var_Create( p_demux, "v4l-tuner", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
350 var_Get( p_demux, "v4l-tuner", &val );
351 p_sys->i_tuner = val.i_int;
353 var_Create( p_demux, "v4l-frequency",
354 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
355 var_Get( p_demux, "v4l-frequency", &val );
356 p_sys->i_frequency = val.i_int;
358 var_Create( p_demux, "v4l-fps", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
359 var_Get( p_demux, "v4l-fps", &val );
360 p_sys->f_fps = val.f_float;
362 var_Create( p_demux, "v4l-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
363 var_Get( p_demux, "v4l-width", &val );
364 p_sys->i_width = val.i_int;
366 var_Create( p_demux, "v4l-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
367 var_Get( p_demux, "v4l-height", &val );
368 p_sys->i_height = val.i_int;
370 p_sys->i_video_pts = -1;
372 var_Create( p_demux, "v4l-brightness", VLC_VAR_INTEGER |
374 var_Get( p_demux, "v4l-brightness", &val );
375 p_sys->i_brightness = val.i_int;
377 var_Create( p_demux, "v4l-hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
378 var_Get( p_demux, "v4l-hue", &val );
381 var_Create( p_demux, "v4l-colour", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
382 var_Get( p_demux, "v4l-colour", &val );
383 p_sys->i_colour = val.i_int;
385 var_Create( p_demux, "v4l-contrast", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
386 var_Get( p_demux, "v4l-contrast", &val );
387 p_sys->i_contrast = val.i_int;
389 var_Create( p_demux, "v4l-mjpeg", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
390 var_Get( p_demux, "v4l-mjpeg", &val );
391 p_sys->b_mjpeg = val.b_bool;
393 var_Create( p_demux, "v4l-decimation", VLC_VAR_INTEGER |
395 var_Get( p_demux, "v4l-decimation", &val );
396 p_sys->i_decimation = val.i_int;
398 var_Create( p_demux, "v4l-quality", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
399 var_Get( p_demux, "v4l-quality", &val );
400 p_sys->i_quality = val.i_int;
402 var_Create( p_demux, "v4l-samplerate",
403 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
404 var_Get( p_demux, "v4l-samplerate", &val );
405 p_sys->i_sample_rate = val.i_int;
407 var_Create( p_demux, "v4l-stereo", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
408 var_Get( p_demux, "v4l-stereo", &val );
409 p_sys->b_stereo = val.b_bool;
411 p_sys->psz_device = p_sys->psz_vdev = p_sys->psz_adev = NULL;
412 p_sys->fd_video = -1;
413 p_sys->fd_audio = -1;
415 p_sys->p_es_video = p_sys->p_es_audio = 0;
416 p_sys->p_block_audio = 0;
420 /* Find main device (video or audio) */
421 if( p_sys->psz_device && *p_sys->psz_device )
423 msg_Dbg( p_demux, "main device=`%s'", p_sys->psz_device );
425 /* Try to open as video device */
426 p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_device );
428 if( p_sys->fd_video < 0 )
430 /* Try to open as audio device */
431 p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_device );
432 if( p_sys->fd_audio >= 0 )
434 free( p_sys->psz_adev );
435 p_sys->psz_adev = p_sys->psz_device;
436 p_sys->psz_device = NULL;
441 free( p_sys->psz_vdev );
442 p_sys->psz_vdev = p_sys->psz_device;
443 p_sys->psz_device = NULL;
447 /* If no device opened, only continue if the access was forced */
448 if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
450 if( strcmp( p_demux->psz_access, "v4l" ) )
457 /* Find video device */
458 if( p_sys->fd_video < 0 )
460 if( !p_sys->psz_vdev || !*p_sys->psz_vdev )
462 free( p_sys->psz_vdev );
463 p_sys->psz_vdev = var_CreateGetString( p_demux, "v4l-vdev" );;
466 if( p_sys->psz_vdev && *p_sys->psz_vdev )
468 p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_vdev );
472 /* Find audio device */
473 if( p_sys->fd_audio < 0 )
475 if( !p_sys->psz_adev || !*p_sys->psz_adev )
477 free( p_sys->psz_adev );
478 p_sys->psz_adev = var_CreateGetString( p_demux, "v4l-adev" );;
481 if( p_sys->psz_adev && *p_sys->psz_adev )
483 p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_adev );
487 if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
493 msg_Dbg( p_demux, "v4l grabbing started" );
495 /* Declare elementary streams */
496 if( p_sys->fd_video >= 0 )
499 es_format_Init( &fmt, VIDEO_ES, p_sys->i_fourcc );
500 fmt.video.i_width = p_sys->i_width;
501 fmt.video.i_height = p_sys->i_height;
502 fmt.video.i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
504 /* Setup rgb mask for RGB formats */
505 if( p_sys->i_fourcc == VLC_FOURCC('R','V','2','4') )
507 /* This is in BGR format */
508 fmt.video.i_bmask = 0x00ff0000;
509 fmt.video.i_gmask = 0x0000ff00;
510 fmt.video.i_rmask = 0x000000ff;
513 msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
514 (char*)&fmt.i_codec, fmt.video.i_width, fmt.video.i_height );
515 p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
518 if( p_sys->fd_audio >= 0 )
521 es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC('a','r','a','w') );
523 fmt.audio.i_channels = p_sys->b_stereo ? 2 : 1;
524 fmt.audio.i_rate = p_sys->i_sample_rate;
525 fmt.audio.i_bitspersample = 16; // FIXME ?
526 fmt.audio.i_blockalign = fmt.audio.i_channels *
527 fmt.audio.i_bitspersample / 8;
528 fmt.i_bitrate = fmt.audio.i_channels * fmt.audio.i_rate *
529 fmt.audio.i_bitspersample;
531 msg_Dbg( p_demux, "new audio es %d channels %dHz",
532 fmt.audio.i_channels, fmt.audio.i_rate );
534 p_sys->p_es_audio = es_out_Add( p_demux->out, &fmt );
537 /* Update default_pts to a suitable value for access */
538 var_Create( p_demux, "v4l-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
543 /*****************************************************************************
544 * Close: close device, free resources
545 *****************************************************************************/
546 static void Close( vlc_object_t *p_this )
548 demux_t *p_demux = (demux_t *)p_this;
549 demux_sys_t *p_sys = p_demux->p_sys;
551 free( p_sys->psz_device );
552 free( p_sys->psz_vdev );
553 free( p_sys->psz_adev );
554 if( p_sys->fd_video >= 0 ) close( p_sys->fd_video );
555 if( p_sys->fd_audio >= 0 ) close( p_sys->fd_audio );
556 if( p_sys->p_block_audio ) block_Release( p_sys->p_block_audio );
561 ioctl( p_sys->fd_video, MJPIOC_QBUF_CAPT, &i_noframe );
564 if( p_sys->p_video_mmap && p_sys->p_video_mmap != MAP_FAILED )
567 munmap( p_sys->p_video_mmap, p_sys->mjpeg_buffers.size *
568 p_sys->mjpeg_buffers.count );
570 munmap( p_sys->p_video_mmap, p_sys->vid_mbuf.size );
576 /*****************************************************************************
578 *****************************************************************************/
579 static int Control( demux_t *p_demux, int i_query, va_list args )
586 /* Special for access_demux */
587 case DEMUX_CAN_PAUSE:
589 case DEMUX_SET_PAUSE_STATE:
590 case DEMUX_CAN_CONTROL_PACE:
591 pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
595 case DEMUX_GET_PTS_DELAY:
596 pi64 = (int64_t*)va_arg( args, int64_t * );
597 *pi64 = (int64_t)var_GetInteger( p_demux, "v4l-caching" ) * 1000;
601 pi64 = (int64_t*)va_arg( args, int64_t * );
605 /* TODO implement others */
613 /*****************************************************************************
615 *****************************************************************************/
616 static int Demux( demux_t *p_demux )
618 demux_sys_t *p_sys = p_demux->p_sys;
619 es_out_id_t *p_es = p_sys->p_es_audio;
620 block_t *p_block = NULL;
622 /* Try grabbing audio frames first */
623 if( p_sys->fd_audio < 0 || !( p_block = GrabAudio( p_demux ) ) )
625 /* Try grabbing video frame */
626 p_es = p_sys->p_es_video;
627 if( p_sys->fd_video > 0 ) p_block = GrabVideo( p_demux );
632 /* Sleep so we do not consume all the cpu, 10ms seems
633 * like a good value (100fps) */
638 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
639 es_out_Send( p_demux->out, p_es, p_block );
644 /*****************************************************************************
645 * ParseMRL: parse the options contained in the MRL
646 *****************************************************************************/
647 static void ParseMRL( demux_t *p_demux )
649 demux_sys_t *p_sys = p_demux->p_sys;
651 char *psz_dup = strdup( p_demux->psz_path );
652 char *psz_parser = psz_dup;
654 while( *psz_parser && *psz_parser != ':' )
659 if( *psz_parser == ':' )
664 *psz_parser++ = '\0';
665 if( !strncmp( psz_parser, "channel=", strlen( "channel=" ) ) )
667 p_sys->i_channel = strtol( psz_parser + strlen( "channel=" ),
670 else if( !strncmp( psz_parser, "norm=", strlen( "norm=" ) ) )
672 psz_parser += strlen( "norm=" );
673 if( !strncmp( psz_parser, "pal", strlen( "pal" ) ) )
675 p_sys->i_norm = VIDEO_MODE_PAL;
676 psz_parser += strlen( "pal" );
678 else if( !strncmp( psz_parser, "ntsc", strlen( "ntsc" ) ) )
680 p_sys->i_norm = VIDEO_MODE_NTSC;
681 psz_parser += strlen( "ntsc" );
683 else if( !strncmp( psz_parser, "secam", strlen( "secam" ) ) )
685 p_sys->i_norm = VIDEO_MODE_SECAM;
686 psz_parser += strlen( "secam" );
688 else if( !strncmp( psz_parser, "auto", strlen( "auto" ) ) )
690 p_sys->i_norm = VIDEO_MODE_AUTO;
691 psz_parser += strlen( "auto" );
695 p_sys->i_norm = strtol( psz_parser, &psz_parser, 0 );
698 else if( !strncmp( psz_parser, "frequency=",
699 strlen( "frequency=" ) ) )
702 strtol( psz_parser + strlen( "frequency=" ),
704 if( p_sys->i_frequency < 30000 )
706 msg_Warn( p_demux, "v4l syntax has changed : "
707 "'frequency' is now channel frequency in kHz");
710 else if( !strncmp( psz_parser, "audio=", strlen( "audio=" ) ) )
712 p_sys->i_audio = strtol( psz_parser + strlen( "audio=" ),
715 else if( !strncmp( psz_parser, "size=", strlen( "size=" ) ) )
717 psz_parser += strlen( "size=" );
718 if( !strncmp( psz_parser, "subqcif", strlen( "subqcif" ) ) )
720 p_sys->i_width = 128;
721 p_sys->i_height = 96;
723 else if( !strncmp( psz_parser, "qsif", strlen( "qsif" ) ) )
725 p_sys->i_width = 160;
726 p_sys->i_height = 120;
728 else if( !strncmp( psz_parser, "qcif", strlen( "qcif" ) ) )
730 p_sys->i_width = 176;
731 p_sys->i_height = 144;
733 else if( !strncmp( psz_parser, "sif", strlen( "sif" ) ) )
735 p_sys->i_width = 320;
736 p_sys->i_height = 244;
738 else if( !strncmp( psz_parser, "cif", strlen( "cif" ) ) )
740 p_sys->i_width = 352;
741 p_sys->i_height = 288;
743 else if( !strncmp( psz_parser, "vga", strlen( "vga" ) ) )
745 p_sys->i_width = 640;
746 p_sys->i_height = 480;
751 p_sys->i_width = strtol( psz_parser, &psz_parser, 0 );
752 if( *psz_parser == 'x' || *psz_parser == 'X')
754 p_sys->i_height = strtol( psz_parser + 1,
757 msg_Dbg( p_demux, "WxH %dx%d", p_sys->i_width,
761 else if( !strncmp( psz_parser, "brightness=", strlen( "brightness=" ) ) )
763 p_sys->i_brightness = strtol( psz_parser + strlen( "brightness=" ),
766 else if( !strncmp( psz_parser, "colour=", strlen( "colour=" ) ) )
768 p_sys->i_colour = strtol( psz_parser + strlen( "colour=" ),
771 else if( !strncmp( psz_parser, "hue=", strlen( "hue=" ) ) )
773 p_sys->i_hue = strtol( psz_parser + strlen( "hue=" ),
776 else if( !strncmp( psz_parser, "contrast=", strlen( "contrast=" ) ) )
778 p_sys->i_contrast = strtol( psz_parser + strlen( "contrast=" ),
781 else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
783 p_sys->i_tuner = strtol( psz_parser + strlen( "tuner=" ),
786 else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) ) )
790 psz_parser += strlen( "adev=" );
791 if( strchr( psz_parser, ':' ) )
793 i_len = strchr( psz_parser, ':' ) - psz_parser;
797 i_len = strlen( psz_parser );
800 p_sys->psz_adev = strndup( psz_parser, i_len );
804 else if( !strncmp( psz_parser, "samplerate=",
805 strlen( "samplerate=" ) ) )
807 p_sys->i_sample_rate =
808 strtol( psz_parser + strlen( "samplerate=" ),
811 else if( !strncmp( psz_parser, "stereo", strlen( "stereo" ) ) )
813 psz_parser += strlen( "stereo" );
815 p_sys->b_stereo = VLC_TRUE;
817 else if( !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
819 psz_parser += strlen( "mono" );
821 p_sys->b_stereo = VLC_FALSE;
823 else if( !strncmp( psz_parser, "mjpeg", strlen( "mjpeg" ) ) )
825 psz_parser += strlen( "mjpeg" );
827 p_sys->b_mjpeg = VLC_TRUE;
829 else if( !strncmp( psz_parser, "decimation=",
830 strlen( "decimation=" ) ) )
832 p_sys->i_decimation =
833 strtol( psz_parser + strlen( "decimation=" ),
836 else if( !strncmp( psz_parser, "quality=",
837 strlen( "quality=" ) ) )
840 strtol( psz_parser + strlen( "quality=" ),
843 else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
845 p_sys->f_fps = strtof( psz_parser + strlen( "fps=" ),
850 msg_Warn( p_demux, "unknown option" );
853 while( *psz_parser && *psz_parser != ':' )
858 if( *psz_parser == '\0' )
867 p_sys->psz_device = strdup( psz_dup );
872 /*****************************************************************************
874 *****************************************************************************/
875 static int OpenVideoDev( demux_t *p_demux, char *psz_device )
877 demux_sys_t *p_sys = p_demux->p_sys;
880 struct video_channel vid_channel;
881 struct mjpeg_params mjpeg;
884 if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
886 msg_Err( p_demux, "cannot open device (%m)" );
890 if( ioctl( i_fd, VIDIOCGCAP, &p_sys->vid_cap ) < 0 )
892 msg_Err( p_demux, "cannot get capabilities (%m)" );
897 "V4L device %s %d channels %d audios %d < w < %d %d < h < %d",
899 p_sys->vid_cap.channels,
900 p_sys->vid_cap.audios,
901 p_sys->vid_cap.minwidth, p_sys->vid_cap.maxwidth,
902 p_sys->vid_cap.minheight, p_sys->vid_cap.maxheight );
904 if( p_sys->i_channel < 0 || p_sys->i_channel >= p_sys->vid_cap.channels )
906 msg_Dbg( p_demux, "invalid channel, falling back on channel 0" );
907 p_sys->i_channel = 0;
909 if( p_sys->vid_cap.audios && p_sys->i_audio >= p_sys->vid_cap.audios )
911 msg_Dbg( p_demux, "invalid audio, falling back with no audio" );
915 if( p_sys->i_width < p_sys->vid_cap.minwidth ||
916 p_sys->i_width > p_sys->vid_cap.maxwidth )
918 msg_Dbg( p_demux, "invalid width %i", p_sys->i_width );
921 if( p_sys->i_height < p_sys->vid_cap.minheight ||
922 p_sys->i_height > p_sys->vid_cap.maxheight )
924 msg_Dbg( p_demux, "invalid height %i", p_sys->i_height );
928 if( !( p_sys->vid_cap.type & VID_TYPE_CAPTURE ) )
930 msg_Err( p_demux, "cannot grab" );
934 vid_channel.channel = p_sys->i_channel;
935 if( ioctl( i_fd, VIDIOCGCHAN, &vid_channel ) < 0 )
937 msg_Err( p_demux, "cannot get channel infos (%m)" );
941 "setting channel %s(%d) %d tuners flags=0x%x type=0x%x norm=0x%x",
942 vid_channel.name, vid_channel.channel, vid_channel.tuners,
943 vid_channel.flags, vid_channel.type, vid_channel.norm );
945 if( p_sys->i_tuner >= vid_channel.tuners )
947 msg_Dbg( p_demux, "invalid tuner, falling back on tuner 0" );
951 vid_channel.norm = p_sys->i_norm;
952 if( ioctl( i_fd, VIDIOCSCHAN, &vid_channel ) < 0 )
954 msg_Err( p_demux, "cannot set channel (%m)" );
958 if( vid_channel.flags & VIDEO_VC_TUNER )
963 struct video_tuner vid_tuner;
964 if( p_sys->i_tuner >= 0 )
966 vid_tuner.tuner = p_sys->i_tuner;
967 if( ioctl( i_fd, VIDIOCGTUNER, &vid_tuner ) < 0 )
969 msg_Err( p_demux, "cannot get tuner (%m)" );
972 msg_Dbg( p_demux, "tuner %s low=%d high=%d, flags=0x%x "
973 "mode=0x%x signal=0x%x",
974 vid_tuner.name, vid_tuner.rangelow, vid_tuner.rangehigh,
975 vid_tuner.flags, vid_tuner.mode, vid_tuner.signal );
977 msg_Dbg( p_demux, "setting tuner %s (%d)",
978 vid_tuner.name, vid_tuner.tuner );
980 /* FIXME FIXME to be checked FIXME FIXME */
981 //vid_tuner.mode = p_sys->i_norm;
982 if( ioctl( i_fd, VIDIOCSTUNER, &vid_tuner ) < 0 )
984 msg_Err( p_demux, "cannot set tuner (%m)" );
990 /* Show a warning if frequency is < than 30000.
991 * User is certainly usint old syntax. */
995 if( p_sys->i_frequency >= 0 )
997 int driver_frequency = p_sys->i_frequency * 16 /1000;
998 if( ioctl( i_fd, VIDIOCSFREQ, &driver_frequency ) < 0 )
1000 msg_Err( p_demux, "cannot set frequency (%m)" );
1003 msg_Dbg( p_demux, "frequency %d (%d)", p_sys->i_frequency,
1009 if( vid_channel.flags & VIDEO_VC_AUDIO )
1011 struct video_audio vid_audio;
1013 /* XXX TODO volume, balance, ... */
1014 if( p_sys->i_audio >= 0 )
1016 vid_audio.audio = p_sys->i_audio;
1017 if( ioctl( i_fd, VIDIOCGAUDIO, &vid_audio ) < 0 )
1019 msg_Err( p_demux, "cannot get audio (%m)" );
1024 vid_audio.flags &= ~VIDEO_AUDIO_MUTE;
1026 if( ioctl( i_fd, VIDIOCSAUDIO, &vid_audio ) < 0 )
1028 msg_Err( p_demux, "cannot set audio (%m)" );
1035 /* establish basic params with input and norm before feeling width
1037 if( p_sys->b_mjpeg )
1039 struct quicktime_mjpeg_app1 *p_app1;
1042 if( ioctl( i_fd, MJPIOC_G_PARAMS, &mjpeg ) < 0 )
1044 msg_Err( p_demux, "cannot get mjpeg params (%m)" );
1047 mjpeg.input = p_sys->i_channel;
1048 mjpeg.norm = p_sys->i_norm;
1049 mjpeg.decimation = p_sys->i_decimation;
1051 if( p_sys->i_width )
1052 mjpeg.img_width = p_sys->i_width / p_sys->i_decimation;
1053 if( p_sys->i_height )
1054 mjpeg.img_height = p_sys->i_height / p_sys->i_decimation;
1056 /* establish Quicktime APP1 marker while we are here */
1061 p_app1 = (struct quicktime_mjpeg_app1 *)mjpeg.APP_data;
1062 p_app1->i_reserved = 0;
1063 p_app1->i_tag = VLC_FOURCC( 'm','j','p','g' );
1064 p_app1->i_field_size = 0;
1065 p_app1->i_padded_field_size = 0;
1066 p_app1->i_next_field = 0;
1067 /* XXX WARNING XXX */
1068 /* these's nothing magic about these values. We are dangerously
1069 * assuming the encoder card is encoding mjpeg-a and is not throwing
1070 * in marker tags we aren't expecting. It's bad enough we have to
1071 * search through the jpeg output for every frame we grab just to
1072 * find the first field's end marker, so we take this risk to boost
1074 * This is really something the driver could do for us because this
1075 * does conform to standards outside of Apple Quicktime.
1078 p_app1->i_DQT_offset = hton32( i_offset );
1080 p_app1->i_DHT_offset = hton32( i_offset );
1082 p_app1->i_SOF_offset = hton32( i_offset );
1084 p_app1->i_SOS_offset = hton32( i_offset );
1086 p_app1->i_data_offset = hton32( i_offset );
1088 /* SOF and SOS aren't specified by the mjpeg API because they aren't
1089 * optional. They will be present in the output. */
1090 mjpeg.jpeg_markers = JPEG_MARKER_DHT | JPEG_MARKER_DQT;
1092 if( ioctl( i_fd, MJPIOC_S_PARAMS, &mjpeg ) < 0 )
1094 msg_Err( p_demux, "cannot set mjpeg params (%m)" );
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 (%m)" );
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 (%m)" );
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) "
1353 if( ioctl( i_fd, SNDCTL_DSP_STEREO,
1354 &p_sys->b_stereo ) < 0 )
1356 msg_Err( p_demux, "cannot set audio channels count (%m)" );
1360 if( ioctl( i_fd, SNDCTL_DSP_SPEED,
1361 &p_sys->i_sample_rate ) < 0 )
1363 msg_Err( p_demux, "cannot set audio sample rate (%m)" );
1367 msg_Dbg( p_demux, "opened adev=`%s' %s %dHz",
1368 psz_device, p_sys->b_stereo ? "stereo" : "mono",
1369 p_sys->i_sample_rate );
1371 p_sys->i_audio_max_frame_size = 6 * 1024;
1377 if( i_fd >= 0 ) close( i_fd );
1381 /*****************************************************************************
1382 * GrabAudio: grab audio
1383 *****************************************************************************/
1384 static block_t *GrabAudio( demux_t *p_demux )
1386 demux_sys_t *p_sys = p_demux->p_sys;
1387 struct audio_buf_info buf_info;
1388 int i_read, i_correct;
1391 if( p_sys->p_block_audio ) p_block = p_sys->p_block_audio;
1392 else p_block = block_New( p_demux, p_sys->i_audio_max_frame_size );
1396 msg_Warn( p_demux, "cannot get block" );
1400 p_sys->p_block_audio = p_block;
1402 i_read = read( p_sys->fd_audio, p_block->p_buffer,
1403 p_sys->i_audio_max_frame_size );
1405 if( i_read <= 0 ) return 0;
1407 p_block->i_buffer = i_read;
1408 p_sys->p_block_audio = 0;
1410 /* Correct the date because of kernel buffering */
1412 if( ioctl( p_sys->fd_audio, SNDCTL_DSP_GETISPACE, &buf_info ) == 0 )
1414 i_correct += buf_info.bytes;
1417 p_block->i_pts = p_block->i_dts =
1418 mdate() - I64C(1000000) * (mtime_t)i_correct /
1419 2 / ( p_sys->b_stereo ? 2 : 1) / p_sys->i_sample_rate;
1424 /*****************************************************************************
1426 *****************************************************************************/
1427 static uint8_t *GrabCapture( demux_t *p_demux )
1429 demux_sys_t *p_sys = p_demux->p_sys;
1430 int i_captured_frame = p_sys->i_frame_pos;
1432 p_sys->vid_mmap.frame = (p_sys->i_frame_pos + 1) % p_sys->vid_mbuf.frames;
1434 while( ioctl( p_sys->fd_video, VIDIOCMCAPTURE, &p_sys->vid_mmap ) < 0 )
1436 if( errno != EAGAIN )
1438 msg_Err( p_demux, "failed capturing new frame" );
1442 if( p_demux->b_die )
1447 msg_Dbg( p_demux, "grab failed, trying again" );
1450 while( ioctl(p_sys->fd_video, VIDIOCSYNC, &p_sys->i_frame_pos) < 0 )
1452 if( errno != EAGAIN && errno != EINTR )
1454 msg_Err( p_demux, "failed syncing new frame" );
1459 p_sys->i_frame_pos = p_sys->vid_mmap.frame;
1460 /* leave i_video_frame_size alone */
1461 return p_sys->p_video_mmap + p_sys->vid_mbuf.offsets[i_captured_frame];
1464 static uint8_t *GrabMJPEG( demux_t *p_demux )
1466 demux_sys_t *p_sys = p_demux->p_sys;
1467 struct mjpeg_sync sync;
1468 uint8_t *p_frame, *p_field, *p;
1471 struct quicktime_mjpeg_app1 *p_app1 = NULL;
1473 /* re-queue the last frame we sync'd */
1474 if( p_sys->i_frame_pos != -1 )
1476 while( ioctl( p_sys->fd_video, MJPIOC_QBUF_CAPT,
1477 &p_sys->i_frame_pos ) < 0 )
1479 if( errno != EAGAIN && errno != EINTR )
1481 msg_Err( p_demux, "failed capturing new frame" );
1487 /* sync on the next frame */
1488 while( ioctl( p_sys->fd_video, MJPIOC_SYNC, &sync ) < 0 )
1490 if( errno != EAGAIN && errno != EINTR )
1492 msg_Err( p_demux, "failed syncing new frame" );
1497 p_sys->i_frame_pos = sync.frame;
1498 p_frame = p_sys->p_video_mmap + p_sys->mjpeg_buffers.size * sync.frame;
1500 /* p_frame now points to the data. fix up the Quicktime APP1 marker */
1502 tag = hton16( tag );
1506 p = memmem( p_field, sync.length, &tag, 2 );
1510 p += 2; /* data immediately following EOI */
1512 p_app1 = (struct quicktime_mjpeg_app1 *)(p_field + 6);
1514 i_size = ((uint32_t)(p - p_field));
1515 i_size = hton32( i_size );
1516 memcpy( &p_app1->i_field_size, &i_size, 4 );
1518 while( *p == 0xff && *(p+1) == 0xff )
1521 i_size = ((uint32_t)(p - p_field));
1522 i_size = hton32( i_size );
1523 memcpy( &p_app1->i_padded_field_size, &i_size, 4 );
1527 tag = hton16( tag );
1528 p_field = memmem( p, sync.length - (size_t)(p - p_frame), &tag, 2 );
1532 i_size = (uint32_t)(p_field - p_frame);
1533 i_size = hton32( i_size );
1534 memcpy( &p_app1->i_next_field, &i_size, 4 );
1537 p_app1 = (struct quicktime_mjpeg_app1 *)(p_field + 6);
1539 tag = hton16( tag );
1540 p = memmem( p_field, sync.length - (size_t)(p_field - p_frame),
1545 /* sometimes the second field doesn't have the EOI. just put it
1548 p = p_frame + sync.length;
1549 memcpy( p, &tag, 2 );
1554 i_size = (uint32_t)(p - p_field);
1555 i_size = hton32( i_size );
1556 memcpy( &p_app1->i_field_size, &i_size, 4 );
1557 i_size = (uint32_t)(sync.length - (uint32_t)(p_field - p_frame));
1558 i_size = hton32( i_size );
1559 memcpy( &p_app1->i_padded_field_size, &i_size, 4 );
1562 p_sys->i_video_frame_size = sync.length;
1566 static block_t *GrabVideo( demux_t *p_demux )
1568 demux_sys_t *p_sys = p_demux->p_sys;
1572 if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
1574 mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
1576 /* Did we wait long enough ? (frame rate reduction) */
1577 if( p_sys->i_video_pts + i_dur > mdate() ) return 0;
1580 if( p_sys->b_mjpeg ) p_frame = GrabMJPEG( p_demux );
1581 else p_frame = GrabCapture( p_demux );
1583 if( !p_frame ) return 0;
1585 if( !( p_block = block_New( p_demux, p_sys->i_video_frame_size ) ) )
1587 msg_Warn( p_demux, "cannot get block" );
1591 memcpy( p_block->p_buffer, p_frame, p_sys->i_video_frame_size );
1592 p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();