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 *****************************************************************************/
35 #include <vlc_common.h>
36 #include <vlc_plugin.h>
37 #include <vlc_input.h>
38 #include <vlc_demux.h>
39 #include <vlc_access.h>
41 #include <vlc_codecs.h>
43 #include <sys/types.h>
45 #include <sys/ioctl.h>
50 #include <arpa/inet.h>
52 /* From GStreamer's v4l plugin:
53 * Because of some really cool feature in video4linux1, also known as
54 * 'not including sys/types.h and sys/time.h', we had to include it
55 * ourselves. In all their intelligence, these people decided to fix
56 * this in the next version (video4linux2) in such a cool way that it
57 * breaks all compilations of old stuff...
58 * The real problem is actually that linux/time.h doesn't use proper
59 * macro checks before defining types like struct timeval. The proper
60 * fix here is to either fuck the kernel header (which is what we do
61 * by defining _LINUX_TIME_H, an innocent little hack) or by fixing it
62 * upstream, which I'll consider doing later on. If you get compiler
63 * errors here, check your linux/time.h && sys/time.h header setup.
67 #include <linux/videodev.h>
68 #include "videodev_mjpeg.h"
70 #include <sys/soundcard.h>
72 /*****************************************************************************
74 *****************************************************************************/
75 static int Open ( vlc_object_t * );
76 static void Close( vlc_object_t * );
78 #define CACHING_TEXT N_("Caching value in ms")
79 #define CACHING_LONGTEXT N_( \
80 "Caching value for V4L captures. This " \
81 "value should be set in milliseconds." )
82 #define VDEV_TEXT N_("Video device name")
83 #define VDEV_LONGTEXT N_( \
84 "Name of the video device to use. " \
85 "If you don't specify anything, no video device will be used.")
86 #define ADEV_TEXT N_("Audio device name")
87 #define ADEV_LONGTEXT N_( \
88 "Name of the audio device to use. " \
89 "If you don't specify anything, no audio device will be used.")
90 #define CHROMA_TEXT N_("Video input chroma format")
91 #define CHROMA_LONGTEXT N_( \
92 "Force the Video4Linux video device to use a specific chroma format " \
93 "(eg. I420 (default), RV24, etc.)")
94 #define FREQUENCY_TEXT N_( "Frequency" )
95 #define FREQUENCY_LONGTEXT N_( \
96 "Frequency to capture (in kHz), if applicable." )
97 #define CHANNEL_TEXT N_( "Channel" )
98 #define CHANNEL_LONGTEXT N_( \
99 "Channel of the card to use (Usually, 0 = tuner, " \
100 "1 = composite, 2 = svideo)." )
101 #define NORM_TEXT N_( "Norm" )
102 #define NORM_LONGTEXT N_( \
103 "Norm of the stream (Automatic, SECAM, PAL, or NTSC)." )
104 #define AUDIO_TEXT N_( "Audio Channel" )
105 #define AUDIO_LONGTEXT N_( \
106 "Audio Channel to use, if there are several audio inputs." )
107 #define WIDTH_TEXT N_( "Width" )
108 #define WIDTH_LONGTEXT N_( "Width of the stream to capture " \
109 "(-1 for autodetect)." )
110 #define HEIGHT_TEXT N_( "Height" )
111 #define HEIGHT_LONGTEXT N_( "Height of the stream to capture " \
112 "(-1 for autodetect)." )
113 #define BRIGHTNESS_TEXT N_( "Brightness" )
114 #define BRIGHTNESS_LONGTEXT N_( \
115 "Brightness of the video input." )
116 #define HUE_TEXT N_( "Hue" )
117 #define HUE_LONGTEXT N_( \
118 "Hue of the video input." )
119 #define COLOUR_TEXT N_( "Color" )
120 #define COLOUR_LONGTEXT N_( \
121 "Color of the video input." )
122 #define CONTRAST_TEXT N_( "Contrast" )
123 #define CONTRAST_LONGTEXT N_( \
124 "Contrast of the video input." )
125 #define TUNER_TEXT N_( "Tuner" )
126 #define TUNER_LONGTEXT N_( "Tuner to use, if there are several ones." )
127 #define SAMPLERATE_TEXT N_( "Samplerate" )
128 #define SAMPLERATE_LONGTEXT N_( \
129 "Samplerate of the captured audio stream, in Hz (eg: 11025, 22050, 44100)" )
130 #define STEREO_TEXT N_( "Stereo" )
131 #define STEREO_LONGTEXT N_( \
132 "Capture the audio stream in stereo." )
133 #define MJPEG_TEXT N_( "MJPEG" )
134 #define MJPEG_LONGTEXT N_( \
135 "Set this option if the capture device outputs MJPEG" )
136 #define DECIMATION_TEXT N_( "Decimation" )
137 #define DECIMATION_LONGTEXT N_( \
138 "Decimation level for MJPEG streams" )
139 #define QUALITY_TEXT N_( "Quality" )
140 #define QUALITY_LONGTEXT N_( "Quality of the stream." )
141 #define FPS_TEXT N_( "Framerate" )
142 #define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
143 "(-1 for autodetect)." )
145 static const int i_norm_list[] =
146 { VIDEO_MODE_AUTO, VIDEO_MODE_SECAM, VIDEO_MODE_PAL, VIDEO_MODE_NTSC };
147 static const char *const psz_norm_list_text[] =
148 { N_("Automatic"), N_("SECAM"), N_("PAL"), N_("NTSC") };
151 set_shortname( N_("Video4Linux") )
152 set_description( N_("Video4Linux input") )
153 set_category( CAT_INPUT )
154 set_subcategory( SUBCAT_INPUT_ACCESS )
156 add_integer( "v4l-caching", DEFAULT_PTS_DELAY / 1000, NULL,
157 CACHING_TEXT, CACHING_LONGTEXT, true );
158 add_string( "v4l-vdev", "/dev/video", 0, VDEV_TEXT, VDEV_LONGTEXT,
160 add_string( "v4l-adev", "/dev/dsp", 0, ADEV_TEXT, ADEV_LONGTEXT,
162 add_string( "v4l-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
164 add_float( "v4l-fps", -1.0, NULL, FPS_TEXT, FPS_LONGTEXT, true )
165 add_integer( "v4l-samplerate", 44100, NULL, SAMPLERATE_TEXT,
166 SAMPLERATE_LONGTEXT, true );
167 add_integer( "v4l-channel", 0, NULL, CHANNEL_TEXT, CHANNEL_LONGTEXT,
169 add_integer( "v4l-tuner", -1, NULL, TUNER_TEXT, TUNER_LONGTEXT, true )
170 add_integer( "v4l-norm", VIDEO_MODE_AUTO, NULL, NORM_TEXT, NORM_LONGTEXT,
172 change_integer_list( i_norm_list, psz_norm_list_text, NULL );
173 add_integer( "v4l-frequency", -1, NULL, FREQUENCY_TEXT, FREQUENCY_LONGTEXT,
175 add_integer( "v4l-audio", -1, NULL, AUDIO_TEXT, AUDIO_LONGTEXT, true )
176 add_bool( "v4l-stereo", true, NULL, STEREO_TEXT, STEREO_LONGTEXT,
178 add_integer( "v4l-width", 0, NULL, WIDTH_TEXT, WIDTH_LONGTEXT, true )
179 add_integer( "v4l-height", 0, NULL, HEIGHT_TEXT, HEIGHT_LONGTEXT,
181 add_integer( "v4l-brightness", -1, NULL, BRIGHTNESS_TEXT,
182 BRIGHTNESS_LONGTEXT, true );
183 add_integer( "v4l-colour", -1, NULL, COLOUR_TEXT, COLOUR_LONGTEXT,
185 add_integer( "v4l-hue", -1, NULL, HUE_TEXT, HUE_LONGTEXT, true )
186 add_integer( "v4l-contrast", -1, NULL, CONTRAST_TEXT, CONTRAST_LONGTEXT,
188 add_bool( "v4l-mjpeg", false, NULL, MJPEG_TEXT, MJPEG_LONGTEXT,
190 add_integer( "v4l-decimation", 1, NULL, DECIMATION_TEXT,
191 DECIMATION_LONGTEXT, true );
192 add_integer( "v4l-quality", 100, NULL, QUALITY_TEXT, QUALITY_LONGTEXT,
195 add_shortcut( "v4l" )
196 set_capability( "access_demux", 10 )
197 set_callbacks( Open, Close )
200 /*****************************************************************************
201 * Access: local prototypes
202 *****************************************************************************/
203 static int Demux ( demux_t * );
204 static int Control( demux_t *, int, va_list );
206 static void ParseMRL ( demux_t * );
207 static int OpenVideoDev( demux_t *, char * );
208 static int OpenAudioDev( demux_t *, char * );
210 static block_t *GrabAudio( demux_t * );
211 static block_t *GrabVideo( demux_t * );
213 #define MJPEG_BUFFER_SIZE (256*1024)
215 struct quicktime_mjpeg_app1
217 uint32_t i_reserved; /* set to 0 */
218 uint32_t i_tag; /* 'mjpg' */
219 uint32_t i_field_size; /* offset following EOI */
220 uint32_t i_padded_field_size; /* offset following EOI+pad */
221 uint32_t i_next_field; /* offset to next field */
222 uint32_t i_DQT_offset;
223 uint32_t i_DHT_offset;
224 uint32_t i_SOF_offset;
225 uint32_t i_SOS_offset;
226 uint32_t i_data_offset; /* following SOS marker data */
234 } v4lchroma_to_fourcc[] =
236 { VIDEO_PALETTE_GREY, VLC_FOURCC( 'G', 'R', 'E', 'Y' ) },
237 { VIDEO_PALETTE_HI240, VLC_FOURCC( 'I', '2', '4', '0' ) },
238 { VIDEO_PALETTE_RGB565, VLC_FOURCC( 'R', 'V', '1', '6' ) },
239 { VIDEO_PALETTE_RGB555, VLC_FOURCC( 'R', 'V', '1', '5' ) },
240 { VIDEO_PALETTE_RGB24, VLC_FOURCC( 'R', 'V', '2', '4' ) },
241 { VIDEO_PALETTE_RGB32, VLC_FOURCC( 'R', 'V', '3', '2' ) },
242 { VIDEO_PALETTE_YUV422, VLC_FOURCC( 'Y', 'U', 'Y', '2' ) },
243 { VIDEO_PALETTE_YUV422, VLC_FOURCC( 'Y', 'U', 'Y', 'V' ) },
244 { VIDEO_PALETTE_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', '2' ) },
245 { VIDEO_PALETTE_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', 'V' ) },
246 { VIDEO_PALETTE_UYVY, VLC_FOURCC( 'U', 'Y', 'V', 'Y' ) },
247 { VIDEO_PALETTE_YUV420, VLC_FOURCC( 'I', '4', '2', 'N' ) },
248 { VIDEO_PALETTE_YUV411, VLC_FOURCC( 'I', '4', '1', 'N' ) },
249 { VIDEO_PALETTE_RAW, VLC_FOURCC( 'G', 'R', 'A', 'W' ) },
250 { VIDEO_PALETTE_YUV422P, VLC_FOURCC( 'I', '4', '2', '2' ) },
251 { VIDEO_PALETTE_YUV420P, VLC_FOURCC( 'I', '4', '2', '0' ) },
252 { VIDEO_PALETTE_YUV411P, VLC_FOURCC( 'I', '4', '1', '1' ) },
259 char *psz_device; /* Main device from MRL, can be video or audio */
267 /* Video properties */
284 float f_fps; /* <= 0.0 mean to grab at full rate */
285 mtime_t i_video_pts; /* only used when f_fps > 0 */
291 struct video_capability vid_cap;
292 struct video_mbuf vid_mbuf;
293 struct mjpeg_requestbuffers mjpeg_buffers;
295 uint8_t *p_video_mmap;
298 struct video_mmap vid_mmap;
299 struct video_picture vid_picture;
301 int i_video_frame_size;
302 es_out_id_t *p_es_video;
304 /* Audio properties */
305 vlc_fourcc_t i_acodec_raw;
308 int i_audio_max_frame_size;
309 block_t *p_block_audio;
310 es_out_id_t *p_es_audio;
313 /*****************************************************************************
314 * Open: opens v4l device
315 *****************************************************************************
317 * url: <video device>::::
319 *****************************************************************************/
320 static int Open( vlc_object_t *p_this )
322 demux_t *p_demux = (demux_t*)p_this;
326 /* Only when selected */
327 if( *p_demux->psz_access == '\0' )
331 p_demux->pf_demux = Demux;
332 p_demux->pf_control = Control;
333 p_demux->info.i_update = 0;
334 p_demux->info.i_title = 0;
335 p_demux->info.i_seekpoint = 0;
336 p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
337 memset( p_sys, 0, sizeof( demux_sys_t ) );
339 var_Create( p_demux, "v4l-audio", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
340 var_Get( p_demux, "v4l-audio", &val );
341 p_sys->i_audio = val.i_int;
343 var_Create( p_demux, "v4l-channel", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
344 var_Get( p_demux, "v4l-channel", &val );
345 p_sys->i_channel = val.i_int;
347 var_Create( p_demux, "v4l-norm", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
348 var_Get( p_demux, "v4l-norm", &val );
349 p_sys->i_norm = val.i_int;
351 var_Create( p_demux, "v4l-tuner", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
352 var_Get( p_demux, "v4l-tuner", &val );
353 p_sys->i_tuner = val.i_int;
355 var_Create( p_demux, "v4l-frequency",
356 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
357 var_Get( p_demux, "v4l-frequency", &val );
358 p_sys->i_frequency = val.i_int;
360 var_Create( p_demux, "v4l-fps", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
361 var_Get( p_demux, "v4l-fps", &val );
362 p_sys->f_fps = val.f_float;
364 var_Create( p_demux, "v4l-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
365 var_Get( p_demux, "v4l-width", &val );
366 p_sys->i_width = val.i_int;
368 var_Create( p_demux, "v4l-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
369 var_Get( p_demux, "v4l-height", &val );
370 p_sys->i_height = val.i_int;
372 p_sys->i_video_pts = -1;
374 var_Create( p_demux, "v4l-brightness", VLC_VAR_INTEGER |
376 var_Get( p_demux, "v4l-brightness", &val );
377 p_sys->i_brightness = val.i_int;
379 var_Create( p_demux, "v4l-hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
380 var_Get( p_demux, "v4l-hue", &val );
383 var_Create( p_demux, "v4l-colour", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
384 var_Get( p_demux, "v4l-colour", &val );
385 p_sys->i_colour = val.i_int;
387 var_Create( p_demux, "v4l-contrast", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
388 var_Get( p_demux, "v4l-contrast", &val );
389 p_sys->i_contrast = val.i_int;
391 var_Create( p_demux, "v4l-mjpeg", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
392 var_Get( p_demux, "v4l-mjpeg", &val );
393 p_sys->b_mjpeg = val.b_bool;
395 var_Create( p_demux, "v4l-decimation", VLC_VAR_INTEGER |
397 var_Get( p_demux, "v4l-decimation", &val );
398 p_sys->i_decimation = val.i_int;
400 var_Create( p_demux, "v4l-quality", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
401 var_Get( p_demux, "v4l-quality", &val );
402 p_sys->i_quality = val.i_int;
404 var_Create( p_demux, "v4l-samplerate",
405 VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
406 var_Get( p_demux, "v4l-samplerate", &val );
407 p_sys->i_sample_rate = val.i_int;
409 var_Create( p_demux, "v4l-stereo", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
410 var_Get( p_demux, "v4l-stereo", &val );
411 p_sys->b_stereo = val.b_bool;
413 p_sys->psz_device = p_sys->psz_vdev = p_sys->psz_adev = NULL;
414 p_sys->fd_video = -1;
415 p_sys->fd_audio = -1;
417 p_sys->p_es_video = p_sys->p_es_audio = 0;
418 p_sys->p_block_audio = 0;
422 /* Find main device (video or audio) */
423 if( p_sys->psz_device && *p_sys->psz_device )
425 msg_Dbg( p_demux, "main device=`%s'", p_sys->psz_device );
427 /* Try to open as video device */
428 p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_device );
430 if( p_sys->fd_video < 0 )
432 /* Try to open as audio device */
433 p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_device );
434 if( p_sys->fd_audio >= 0 )
436 free( p_sys->psz_adev );
437 p_sys->psz_adev = p_sys->psz_device;
438 p_sys->psz_device = NULL;
443 free( p_sys->psz_vdev );
444 p_sys->psz_vdev = p_sys->psz_device;
445 p_sys->psz_device = NULL;
449 /* If no device opened, only continue if the access was forced */
450 if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
452 if( strcmp( p_demux->psz_access, "v4l" ) )
459 /* Find video device */
460 if( p_sys->fd_video < 0 )
462 if( !p_sys->psz_vdev || !*p_sys->psz_vdev )
464 free( p_sys->psz_vdev );
465 p_sys->psz_vdev = var_CreateGetString( p_demux, "v4l-vdev" );;
468 if( p_sys->psz_vdev && *p_sys->psz_vdev )
470 p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_vdev );
474 /* Find audio device */
475 if( p_sys->fd_audio < 0 )
477 if( !p_sys->psz_adev || !*p_sys->psz_adev )
479 free( p_sys->psz_adev );
480 p_sys->psz_adev = var_CreateGetString( p_demux, "v4l-adev" );;
483 if( p_sys->psz_adev && *p_sys->psz_adev )
485 p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_adev );
489 if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
495 msg_Dbg( p_demux, "v4l grabbing started" );
497 /* Declare elementary streams */
498 if( p_sys->fd_video >= 0 )
501 es_format_Init( &fmt, VIDEO_ES, p_sys->i_fourcc );
502 fmt.video.i_width = p_sys->i_width;
503 fmt.video.i_height = p_sys->i_height;
504 fmt.video.i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
506 /* Setup rgb mask for RGB formats */
507 switch( p_sys->i_fourcc )
509 case VLC_FOURCC('R','V','1','5'):
510 fmt.video.i_rmask = 0x001f;
511 fmt.video.i_gmask = 0x03e0;
512 fmt.video.i_bmask = 0x7c00;
514 case VLC_FOURCC('R','V','1','6'):
515 fmt.video.i_rmask = 0x001f;
516 fmt.video.i_gmask = 0x07e0;
517 fmt.video.i_bmask = 0xf800;
519 case VLC_FOURCC('R','V','2','4'):
520 case VLC_FOURCC('R','V','3','2'):
521 fmt.video.i_rmask = 0x00ff0000;
522 fmt.video.i_gmask = 0x0000ff00;
523 fmt.video.i_bmask = 0x000000ff;
527 msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
528 (char*)&fmt.i_codec, fmt.video.i_width, fmt.video.i_height );
529 p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
532 if( p_sys->fd_audio >= 0 )
535 es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC('a','r','a','w') );
537 fmt.audio.i_channels = p_sys->b_stereo ? 2 : 1;
538 fmt.audio.i_rate = p_sys->i_sample_rate;
539 fmt.audio.i_bitspersample = 16; // FIXME ?
540 fmt.audio.i_blockalign = fmt.audio.i_channels *
541 fmt.audio.i_bitspersample / 8;
542 fmt.i_bitrate = fmt.audio.i_channels * fmt.audio.i_rate *
543 fmt.audio.i_bitspersample;
545 msg_Dbg( p_demux, "new audio es %d channels %dHz",
546 fmt.audio.i_channels, fmt.audio.i_rate );
548 p_sys->p_es_audio = es_out_Add( p_demux->out, &fmt );
551 /* Update default_pts to a suitable value for access */
552 var_Create( p_demux, "v4l-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
557 /*****************************************************************************
558 * Close: close device, free resources
559 *****************************************************************************/
560 static void Close( vlc_object_t *p_this )
562 demux_t *p_demux = (demux_t *)p_this;
563 demux_sys_t *p_sys = p_demux->p_sys;
565 free( p_sys->psz_device );
566 free( p_sys->psz_vdev );
567 free( p_sys->psz_adev );
568 if( p_sys->fd_video >= 0 ) close( p_sys->fd_video );
569 if( p_sys->fd_audio >= 0 ) close( p_sys->fd_audio );
570 if( p_sys->p_block_audio ) block_Release( p_sys->p_block_audio );
575 ioctl( p_sys->fd_video, MJPIOC_QBUF_CAPT, &i_noframe );
578 if( p_sys->p_video_mmap && p_sys->p_video_mmap != MAP_FAILED )
581 munmap( p_sys->p_video_mmap, p_sys->mjpeg_buffers.size *
582 p_sys->mjpeg_buffers.count );
584 munmap( p_sys->p_video_mmap, p_sys->vid_mbuf.size );
590 /*****************************************************************************
592 *****************************************************************************/
593 static int Control( demux_t *p_demux, int i_query, va_list args )
600 /* Special for access_demux */
601 case DEMUX_CAN_PAUSE:
603 case DEMUX_SET_PAUSE_STATE:
604 case DEMUX_CAN_CONTROL_PACE:
605 pb = (bool*)va_arg( args, bool * );
609 case DEMUX_GET_PTS_DELAY:
610 pi64 = (int64_t*)va_arg( args, int64_t * );
611 *pi64 = (int64_t)var_GetInteger( p_demux, "v4l-caching" ) * 1000;
615 pi64 = (int64_t*)va_arg( args, int64_t * );
619 /* TODO implement others */
627 /*****************************************************************************
629 *****************************************************************************/
630 static int Demux( demux_t *p_demux )
632 demux_sys_t *p_sys = p_demux->p_sys;
633 es_out_id_t *p_es = p_sys->p_es_audio;
634 block_t *p_block = NULL;
636 /* Try grabbing audio frames first */
637 if( p_sys->fd_audio < 0 || !( p_block = GrabAudio( p_demux ) ) )
639 /* Try grabbing video frame */
640 p_es = p_sys->p_es_video;
641 if( p_sys->fd_video > 0 ) p_block = GrabVideo( p_demux );
646 /* Sleep so we do not consume all the cpu, 10ms seems
647 * like a good value (100fps) */
652 es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
653 es_out_Send( p_demux->out, p_es, p_block );
658 /*****************************************************************************
659 * ParseMRL: parse the options contained in the MRL
660 *****************************************************************************/
661 static void ParseMRL( demux_t *p_demux )
663 demux_sys_t *p_sys = p_demux->p_sys;
665 char *psz_dup = strdup( p_demux->psz_path );
666 char *psz_parser = psz_dup;
668 while( *psz_parser && *psz_parser != ':' )
673 if( *psz_parser == ':' )
678 *psz_parser++ = '\0';
679 if( !strncmp( psz_parser, "channel=", strlen( "channel=" ) ) )
681 p_sys->i_channel = strtol( psz_parser + strlen( "channel=" ),
684 else if( !strncmp( psz_parser, "norm=", strlen( "norm=" ) ) )
686 psz_parser += strlen( "norm=" );
687 if( !strncmp( psz_parser, "pal", strlen( "pal" ) ) )
689 p_sys->i_norm = VIDEO_MODE_PAL;
690 psz_parser += strlen( "pal" );
692 else if( !strncmp( psz_parser, "ntsc", strlen( "ntsc" ) ) )
694 p_sys->i_norm = VIDEO_MODE_NTSC;
695 psz_parser += strlen( "ntsc" );
697 else if( !strncmp( psz_parser, "secam", strlen( "secam" ) ) )
699 p_sys->i_norm = VIDEO_MODE_SECAM;
700 psz_parser += strlen( "secam" );
702 else if( !strncmp( psz_parser, "auto", strlen( "auto" ) ) )
704 p_sys->i_norm = VIDEO_MODE_AUTO;
705 psz_parser += strlen( "auto" );
709 p_sys->i_norm = strtol( psz_parser, &psz_parser, 0 );
712 else if( !strncmp( psz_parser, "frequency=",
713 strlen( "frequency=" ) ) )
716 strtol( psz_parser + strlen( "frequency=" ),
718 if( p_sys->i_frequency < 30000 )
720 msg_Warn( p_demux, "v4l syntax has changed : "
721 "'frequency' is now channel frequency in kHz");
724 else if( !strncmp( psz_parser, "audio=", strlen( "audio=" ) ) )
726 p_sys->i_audio = strtol( psz_parser + strlen( "audio=" ),
729 else if( !strncmp( psz_parser, "size=", strlen( "size=" ) ) )
731 psz_parser += strlen( "size=" );
732 if( !strncmp( psz_parser, "subqcif", strlen( "subqcif" ) ) )
734 p_sys->i_width = 128;
735 p_sys->i_height = 96;
737 else if( !strncmp( psz_parser, "qsif", strlen( "qsif" ) ) )
739 p_sys->i_width = 160;
740 p_sys->i_height = 120;
742 else if( !strncmp( psz_parser, "qcif", strlen( "qcif" ) ) )
744 p_sys->i_width = 176;
745 p_sys->i_height = 144;
747 else if( !strncmp( psz_parser, "sif", strlen( "sif" ) ) )
749 p_sys->i_width = 320;
750 p_sys->i_height = 244;
752 else if( !strncmp( psz_parser, "cif", strlen( "cif" ) ) )
754 p_sys->i_width = 352;
755 p_sys->i_height = 288;
757 else if( !strncmp( psz_parser, "vga", strlen( "vga" ) ) )
759 p_sys->i_width = 640;
760 p_sys->i_height = 480;
765 p_sys->i_width = strtol( psz_parser, &psz_parser, 0 );
766 if( *psz_parser == 'x' || *psz_parser == 'X')
768 p_sys->i_height = strtol( psz_parser + 1,
771 msg_Dbg( p_demux, "WxH %dx%d", p_sys->i_width,
775 else if( !strncmp( psz_parser, "brightness=", strlen( "brightness=" ) ) )
777 p_sys->i_brightness = strtol( psz_parser + strlen( "brightness=" ),
780 else if( !strncmp( psz_parser, "colour=", strlen( "colour=" ) ) )
782 p_sys->i_colour = strtol( psz_parser + strlen( "colour=" ),
785 else if( !strncmp( psz_parser, "hue=", strlen( "hue=" ) ) )
787 p_sys->i_hue = strtol( psz_parser + strlen( "hue=" ),
790 else if( !strncmp( psz_parser, "contrast=", strlen( "contrast=" ) ) )
792 p_sys->i_contrast = strtol( psz_parser + strlen( "contrast=" ),
795 else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
797 p_sys->i_tuner = strtol( psz_parser + strlen( "tuner=" ),
800 else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) ) )
804 psz_parser += strlen( "adev=" );
805 if( strchr( psz_parser, ':' ) )
807 i_len = strchr( psz_parser, ':' ) - psz_parser;
811 i_len = strlen( psz_parser );
814 p_sys->psz_adev = strndup( psz_parser, i_len );
818 else if( !strncmp( psz_parser, "samplerate=",
819 strlen( "samplerate=" ) ) )
821 p_sys->i_sample_rate =
822 strtol( psz_parser + strlen( "samplerate=" ),
825 else if( !strncmp( psz_parser, "stereo", strlen( "stereo" ) ) )
827 psz_parser += strlen( "stereo" );
829 p_sys->b_stereo = true;
831 else if( !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
833 psz_parser += strlen( "mono" );
835 p_sys->b_stereo = false;
837 else if( !strncmp( psz_parser, "mjpeg", strlen( "mjpeg" ) ) )
839 psz_parser += strlen( "mjpeg" );
841 p_sys->b_mjpeg = true;
843 else if( !strncmp( psz_parser, "decimation=",
844 strlen( "decimation=" ) ) )
846 p_sys->i_decimation =
847 strtol( psz_parser + strlen( "decimation=" ),
850 else if( !strncmp( psz_parser, "quality=",
851 strlen( "quality=" ) ) )
854 strtol( psz_parser + strlen( "quality=" ),
857 else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
859 p_sys->f_fps = strtof( psz_parser + strlen( "fps=" ),
864 msg_Warn( p_demux, "unknown option" );
867 while( *psz_parser && *psz_parser != ':' )
872 if( *psz_parser == '\0' )
881 p_sys->psz_device = strdup( psz_dup );
886 /*****************************************************************************
888 *****************************************************************************/
889 static int OpenVideoDev( demux_t *p_demux, char *psz_device )
891 demux_sys_t *p_sys = p_demux->p_sys;
894 struct video_channel vid_channel;
895 struct mjpeg_params mjpeg;
898 if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
900 msg_Err( p_demux, "cannot open device (%m)" );
904 if( ioctl( i_fd, VIDIOCGCAP, &p_sys->vid_cap ) < 0 )
906 msg_Err( p_demux, "cannot get capabilities (%m)" );
911 "V4L device %s %d channels %d audios %d < w < %d %d < h < %d",
913 p_sys->vid_cap.channels,
914 p_sys->vid_cap.audios,
915 p_sys->vid_cap.minwidth, p_sys->vid_cap.maxwidth,
916 p_sys->vid_cap.minheight, p_sys->vid_cap.maxheight );
918 if( p_sys->i_channel < 0 || p_sys->i_channel >= p_sys->vid_cap.channels )
920 msg_Dbg( p_demux, "invalid channel, falling back on channel 0" );
921 p_sys->i_channel = 0;
923 if( p_sys->vid_cap.audios && p_sys->i_audio >= p_sys->vid_cap.audios )
925 msg_Dbg( p_demux, "invalid audio, falling back with no audio" );
929 if( p_sys->i_width < p_sys->vid_cap.minwidth ||
930 p_sys->i_width > p_sys->vid_cap.maxwidth )
932 msg_Dbg( p_demux, "invalid width %i", p_sys->i_width );
935 if( p_sys->i_height < p_sys->vid_cap.minheight ||
936 p_sys->i_height > p_sys->vid_cap.maxheight )
938 msg_Dbg( p_demux, "invalid height %i", p_sys->i_height );
942 if( !( p_sys->vid_cap.type & VID_TYPE_CAPTURE ) )
944 msg_Err( p_demux, "cannot grab" );
948 vid_channel.channel = p_sys->i_channel;
949 if( ioctl( i_fd, VIDIOCGCHAN, &vid_channel ) < 0 )
951 msg_Err( p_demux, "cannot get channel infos (%m)" );
955 "setting channel %s(%d) %d tuners flags=0x%x type=0x%x norm=0x%x",
956 vid_channel.name, vid_channel.channel, vid_channel.tuners,
957 vid_channel.flags, vid_channel.type, vid_channel.norm );
959 if( p_sys->i_tuner >= vid_channel.tuners )
961 msg_Dbg( p_demux, "invalid tuner, falling back on tuner 0" );
965 vid_channel.norm = p_sys->i_norm;
966 if( ioctl( i_fd, VIDIOCSCHAN, &vid_channel ) < 0 )
968 msg_Err( p_demux, "cannot set channel (%m)" );
972 if( vid_channel.flags & VIDEO_VC_TUNER )
977 struct video_tuner vid_tuner;
978 if( p_sys->i_tuner >= 0 )
980 vid_tuner.tuner = p_sys->i_tuner;
981 if( ioctl( i_fd, VIDIOCGTUNER, &vid_tuner ) < 0 )
983 msg_Err( p_demux, "cannot get tuner (%m)" );
986 msg_Dbg( p_demux, "tuner %s low=%d high=%d, flags=0x%x "
987 "mode=0x%x signal=0x%x",
988 vid_tuner.name, vid_tuner.rangelow, vid_tuner.rangehigh,
989 vid_tuner.flags, vid_tuner.mode, vid_tuner.signal );
991 msg_Dbg( p_demux, "setting tuner %s (%d)",
992 vid_tuner.name, vid_tuner.tuner );
994 /* FIXME FIXME to be checked FIXME FIXME */
995 //vid_tuner.mode = p_sys->i_norm;
996 if( ioctl( i_fd, VIDIOCSTUNER, &vid_tuner ) < 0 )
998 msg_Err( p_demux, "cannot set tuner (%m)" );
1004 /* Show a warning if frequency is < than 30000.
1005 * User is certainly usint old syntax. */
1009 if( p_sys->i_frequency >= 0 )
1011 int driver_frequency = p_sys->i_frequency * 16 /1000;
1012 if( ioctl( i_fd, VIDIOCSFREQ, &driver_frequency ) < 0 )
1014 msg_Err( p_demux, "cannot set frequency (%m)" );
1017 msg_Dbg( p_demux, "frequency %d (%d)", p_sys->i_frequency,
1023 if( vid_channel.flags & VIDEO_VC_AUDIO )
1025 struct video_audio vid_audio;
1027 /* XXX TODO volume, balance, ... */
1028 if( p_sys->i_audio >= 0 )
1030 vid_audio.audio = p_sys->i_audio;
1031 if( ioctl( i_fd, VIDIOCGAUDIO, &vid_audio ) < 0 )
1033 msg_Err( p_demux, "cannot get audio (%m)" );
1038 vid_audio.flags &= ~VIDEO_AUDIO_MUTE;
1040 if( ioctl( i_fd, VIDIOCSAUDIO, &vid_audio ) < 0 )
1042 msg_Err( p_demux, "cannot set audio (%m)" );
1049 /* establish basic params with input and norm before feeling width
1051 if( p_sys->b_mjpeg )
1053 struct quicktime_mjpeg_app1 *p_app1;
1056 if( ioctl( i_fd, MJPIOC_G_PARAMS, &mjpeg ) < 0 )
1058 msg_Err( p_demux, "cannot get mjpeg params (%m)" );
1061 mjpeg.input = p_sys->i_channel;
1062 mjpeg.norm = p_sys->i_norm;
1063 mjpeg.decimation = p_sys->i_decimation;
1065 if( p_sys->i_width )
1066 mjpeg.img_width = p_sys->i_width / p_sys->i_decimation;
1067 if( p_sys->i_height )
1068 mjpeg.img_height = p_sys->i_height / p_sys->i_decimation;
1070 /* establish Quicktime APP1 marker while we are here */
1075 p_app1 = (struct quicktime_mjpeg_app1 *)mjpeg.APP_data;
1076 p_app1->i_reserved = 0;
1077 p_app1->i_tag = VLC_FOURCC( 'm','j','p','g' );
1078 p_app1->i_field_size = 0;
1079 p_app1->i_padded_field_size = 0;
1080 p_app1->i_next_field = 0;
1081 /* XXX WARNING XXX */
1082 /* these's nothing magic about these values. We are dangerously
1083 * assuming the encoder card is encoding mjpeg-a and is not throwing
1084 * in marker tags we aren't expecting. It's bad enough we have to
1085 * search through the jpeg output for every frame we grab just to
1086 * find the first field's end marker, so we take this risk to boost
1088 * This is really something the driver could do for us because this
1089 * does conform to standards outside of Apple Quicktime.
1092 p_app1->i_DQT_offset = hton32( i_offset );
1094 p_app1->i_DHT_offset = hton32( i_offset );
1096 p_app1->i_SOF_offset = hton32( i_offset );
1098 p_app1->i_SOS_offset = hton32( i_offset );
1100 p_app1->i_data_offset = hton32( i_offset );
1102 /* SOF and SOS aren't specified by the mjpeg API because they aren't
1103 * optional. They will be present in the output. */
1104 mjpeg.jpeg_markers = JPEG_MARKER_DHT | JPEG_MARKER_DQT;
1106 if( ioctl( i_fd, MJPIOC_S_PARAMS, &mjpeg ) < 0 )
1108 msg_Err( p_demux, "cannot set mjpeg params (%m)" );
1112 p_sys->i_width = mjpeg.img_width * mjpeg.HorDcm;
1113 p_sys->i_height = mjpeg.img_height * mjpeg.VerDcm *
1114 mjpeg.field_per_buff;
1117 /* fix width/height */
1118 if( !p_sys->b_mjpeg && ( p_sys->i_width == 0 || p_sys->i_height == 0 ) )
1120 struct video_window vid_win;
1122 if( ioctl( i_fd, VIDIOCGWIN, &vid_win ) < 0 )
1124 msg_Err( p_demux, "cannot get win (%m)" );
1127 p_sys->i_width = vid_win.width;
1128 p_sys->i_height = vid_win.height;
1130 if( !p_sys->i_width || !p_sys->i_height )
1132 p_sys->i_width = p_sys->vid_cap.maxwidth;
1133 p_sys->i_height = p_sys->vid_cap.maxheight;
1136 if( !p_sys->i_width || !p_sys->i_height )
1138 msg_Err( p_demux, "invalid video size (%ix%i)",
1139 p_sys->i_width, p_sys->i_height );
1143 msg_Dbg( p_demux, "will use %dx%d", p_sys->i_width, p_sys->i_height );
1146 if( !p_sys->b_mjpeg )
1148 /* set hue/color/.. */
1149 if( ioctl( i_fd, VIDIOCGPICT, &p_sys->vid_picture ) == 0 )
1151 struct video_picture vid_picture = p_sys->vid_picture;
1153 if( p_sys->i_brightness >= 0 && p_sys->i_brightness < 65536 )
1155 vid_picture.brightness = p_sys->i_brightness;
1157 if( p_sys->i_colour >= 0 && p_sys->i_colour < 65536 )
1159 vid_picture.colour = p_sys->i_colour;
1161 if( p_sys->i_hue >= 0 && p_sys->i_hue < 65536 )
1163 vid_picture.hue = p_sys->i_hue;
1165 if( p_sys->i_contrast >= 0 && p_sys->i_contrast < 65536 )
1167 vid_picture.contrast = p_sys->i_contrast;
1169 if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1171 msg_Dbg( p_demux, "v4l device uses brightness: %d",
1172 vid_picture.brightness );
1173 msg_Dbg( p_demux, "v4l device uses colour: %d",
1174 vid_picture.colour );
1175 msg_Dbg( p_demux, "v4l device uses hue: %d", vid_picture.hue );
1176 msg_Dbg( p_demux, "v4l device uses contrast: %d",
1177 vid_picture.contrast );
1178 p_sys->vid_picture = vid_picture;
1182 /* Find out video format used by device */
1183 if( ioctl( i_fd, VIDIOCGPICT, &p_sys->vid_picture ) == 0 )
1185 struct video_picture vid_picture = p_sys->vid_picture;
1189 p_sys->i_fourcc = 0;
1191 psz = var_CreateGetString( p_demux, "v4l-chroma" );
1192 if( strlen( psz ) >= 4 )
1194 vid_picture.palette = 0;
1195 int i_chroma = VLC_FOURCC( psz[0], psz[1], psz[2], psz[3] );
1197 /* Find out v4l chroma code */
1198 for( i = 0; v4lchroma_to_fourcc[i].i_v4l != 0; i++ )
1200 if( v4lchroma_to_fourcc[i].i_fourcc == i_chroma )
1202 vid_picture.palette = v4lchroma_to_fourcc[i].i_v4l;
1209 if( vid_picture.palette &&
1210 !ioctl( i_fd, VIDIOCSPICT, &vid_picture ) )
1212 p_sys->vid_picture = vid_picture;
1216 /* Try to set the format to something easy to encode */
1217 vid_picture.palette = VIDEO_PALETTE_YUV420P;
1218 if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1220 p_sys->vid_picture = vid_picture;
1224 vid_picture.palette = VIDEO_PALETTE_YUV422P;
1225 if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1227 p_sys->vid_picture = vid_picture;
1232 /* Find out final format */
1233 for( i = 0; v4lchroma_to_fourcc[i].i_v4l != 0; i++ )
1235 if( v4lchroma_to_fourcc[i].i_v4l == p_sys->vid_picture.palette)
1237 p_sys->i_fourcc = v4lchroma_to_fourcc[i].i_fourcc;
1244 msg_Err( p_demux, "ioctl VIDIOCGPICT failed" );
1249 if( p_sys->b_mjpeg )
1253 p_sys->mjpeg_buffers.count = 8;
1254 p_sys->mjpeg_buffers.size = MJPEG_BUFFER_SIZE;
1256 if( ioctl( i_fd, MJPIOC_REQBUFS, &p_sys->mjpeg_buffers ) < 0 )
1258 msg_Err( p_demux, "mmap unsupported" );
1262 p_sys->p_video_mmap = mmap( 0,
1263 p_sys->mjpeg_buffers.size * p_sys->mjpeg_buffers.count,
1264 PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, 0 );
1265 if( p_sys->p_video_mmap == MAP_FAILED )
1267 msg_Err( p_demux, "mmap failed" );
1271 p_sys->i_fourcc = VLC_FOURCC( 'm','j','p','g' );
1272 p_sys->i_frame_pos = -1;
1274 /* queue up all the frames */
1275 for( i = 0; i < (int)p_sys->mjpeg_buffers.count; i++ )
1277 if( ioctl( i_fd, MJPIOC_QBUF_CAPT, &i ) < 0 )
1279 msg_Err( p_demux, "unable to queue frame" );
1286 /* Fill in picture_t fields */
1287 vout_InitPicture( VLC_OBJECT(p_demux), &p_sys->pic, p_sys->i_fourcc,
1288 p_sys->i_width, p_sys->i_height, p_sys->i_width *
1289 VOUT_ASPECT_FACTOR / p_sys->i_height );
1290 if( !p_sys->pic.i_planes )
1292 msg_Err( p_demux, "unsupported chroma" );
1295 p_sys->i_video_frame_size = 0;
1296 for( i = 0; i < p_sys->pic.i_planes; i++ )
1298 p_sys->i_video_frame_size += p_sys->pic.p[i].i_visible_lines *
1299 p_sys->pic.p[i].i_visible_pitch;
1302 msg_Dbg( p_demux, "v4l device uses frame size: %i",
1303 p_sys->i_video_frame_size );
1304 msg_Dbg( p_demux, "v4l device uses chroma: %4.4s",
1305 (char*)&p_sys->i_fourcc );
1307 /* Allocate mmap buffer */
1308 if( ioctl( i_fd, VIDIOCGMBUF, &p_sys->vid_mbuf ) < 0 )
1310 msg_Err( p_demux, "mmap unsupported" );
1314 p_sys->p_video_mmap = mmap( 0, p_sys->vid_mbuf.size,
1315 PROT_READ|PROT_WRITE, MAP_SHARED,
1317 if( p_sys->p_video_mmap == MAP_FAILED )
1319 /* FIXME -> normal read */
1320 msg_Err( p_demux, "mmap failed" );
1325 p_sys->vid_mmap.frame = 0;
1326 p_sys->vid_mmap.width = p_sys->i_width;
1327 p_sys->vid_mmap.height = p_sys->i_height;
1328 p_sys->vid_mmap.format = p_sys->vid_picture.palette;
1329 if( ioctl( i_fd, VIDIOCMCAPTURE, &p_sys->vid_mmap ) < 0 )
1331 msg_Warn( p_demux, "%4.4s refused", (char*)&p_sys->i_fourcc );
1332 msg_Err( p_demux, "chroma selection failed" );
1340 if( i_fd >= 0 ) close( i_fd );
1344 /*****************************************************************************
1346 *****************************************************************************/
1347 static int OpenAudioDev( demux_t *p_demux, char *psz_device )
1349 demux_sys_t *p_sys = p_demux->p_sys;
1352 if( (i_fd = open( psz_device, O_RDONLY | O_NONBLOCK )) < 0 )
1354 msg_Err( p_demux, "cannot open audio device (%m)" );
1358 i_format = AFMT_S16_LE;
1359 if( ioctl( i_fd, SNDCTL_DSP_SETFMT, &i_format ) < 0
1360 || i_format != AFMT_S16_LE )
1362 msg_Err( p_demux, "cannot set audio format (16b little endian) "
1367 if( ioctl( i_fd, SNDCTL_DSP_STEREO,
1368 &p_sys->b_stereo ) < 0 )
1370 msg_Err( p_demux, "cannot set audio channels count (%m)" );
1374 if( ioctl( i_fd, SNDCTL_DSP_SPEED,
1375 &p_sys->i_sample_rate ) < 0 )
1377 msg_Err( p_demux, "cannot set audio sample rate (%m)" );
1381 msg_Dbg( p_demux, "opened adev=`%s' %s %dHz",
1382 psz_device, p_sys->b_stereo ? "stereo" : "mono",
1383 p_sys->i_sample_rate );
1385 p_sys->i_audio_max_frame_size = 6 * 1024;
1391 if( i_fd >= 0 ) close( i_fd );
1395 /*****************************************************************************
1396 * GrabAudio: grab audio
1397 *****************************************************************************/
1398 static block_t *GrabAudio( demux_t *p_demux )
1400 demux_sys_t *p_sys = p_demux->p_sys;
1401 struct audio_buf_info buf_info;
1402 int i_read, i_correct;
1405 if( p_sys->p_block_audio ) p_block = p_sys->p_block_audio;
1406 else p_block = block_New( p_demux, p_sys->i_audio_max_frame_size );
1410 msg_Warn( p_demux, "cannot get block" );
1414 p_sys->p_block_audio = p_block;
1416 i_read = read( p_sys->fd_audio, p_block->p_buffer,
1417 p_sys->i_audio_max_frame_size );
1419 if( i_read <= 0 ) return 0;
1421 p_block->i_buffer = i_read;
1422 p_sys->p_block_audio = 0;
1424 /* Correct the date because of kernel buffering */
1426 if( ioctl( p_sys->fd_audio, SNDCTL_DSP_GETISPACE, &buf_info ) == 0 )
1428 i_correct += buf_info.bytes;
1431 p_block->i_pts = p_block->i_dts =
1432 mdate() - INT64_C(1000000) * (mtime_t)i_correct /
1433 2 / ( p_sys->b_stereo ? 2 : 1) / p_sys->i_sample_rate;
1438 /*****************************************************************************
1440 *****************************************************************************/
1441 static uint8_t *GrabCapture( demux_t *p_demux )
1443 demux_sys_t *p_sys = p_demux->p_sys;
1444 int i_captured_frame = p_sys->i_frame_pos;
1446 p_sys->vid_mmap.frame = (p_sys->i_frame_pos + 1) % p_sys->vid_mbuf.frames;
1448 while( ioctl( p_sys->fd_video, VIDIOCMCAPTURE, &p_sys->vid_mmap ) < 0 )
1450 if( errno != EAGAIN )
1452 msg_Err( p_demux, "failed capturing new frame" );
1456 if( !vlc_object_alive (p_demux) )
1461 msg_Dbg( p_demux, "grab failed, trying again" );
1464 while( ioctl(p_sys->fd_video, VIDIOCSYNC, &p_sys->i_frame_pos) < 0 )
1466 if( errno != EAGAIN && errno != EINTR )
1468 msg_Err( p_demux, "failed syncing new frame" );
1473 p_sys->i_frame_pos = p_sys->vid_mmap.frame;
1474 /* leave i_video_frame_size alone */
1475 return p_sys->p_video_mmap + p_sys->vid_mbuf.offsets[i_captured_frame];
1478 static uint8_t *GrabMJPEG( demux_t *p_demux )
1480 demux_sys_t *p_sys = p_demux->p_sys;
1481 struct mjpeg_sync sync;
1482 uint8_t *p_frame, *p_field, *p;
1485 struct quicktime_mjpeg_app1 *p_app1 = NULL;
1487 /* re-queue the last frame we sync'd */
1488 if( p_sys->i_frame_pos != -1 )
1490 while( ioctl( p_sys->fd_video, MJPIOC_QBUF_CAPT,
1491 &p_sys->i_frame_pos ) < 0 )
1493 if( errno != EAGAIN && errno != EINTR )
1495 msg_Err( p_demux, "failed capturing new frame" );
1501 /* sync on the next frame */
1502 while( ioctl( p_sys->fd_video, MJPIOC_SYNC, &sync ) < 0 )
1504 if( errno != EAGAIN && errno != EINTR )
1506 msg_Err( p_demux, "failed syncing new frame" );
1511 p_sys->i_frame_pos = sync.frame;
1512 p_frame = p_sys->p_video_mmap + p_sys->mjpeg_buffers.size * sync.frame;
1514 /* p_frame now points to the data. fix up the Quicktime APP1 marker */
1516 tag = hton16( tag );
1520 p = memmem( p_field, sync.length, &tag, 2 );
1524 p += 2; /* data immediately following EOI */
1526 p_app1 = (struct quicktime_mjpeg_app1 *)(p_field + 6);
1528 i_size = ((uint32_t)(p - p_field));
1529 i_size = hton32( i_size );
1530 memcpy( &p_app1->i_field_size, &i_size, 4 );
1532 while( *p == 0xff && *(p+1) == 0xff )
1535 i_size = ((uint32_t)(p - p_field));
1536 i_size = hton32( i_size );
1537 memcpy( &p_app1->i_padded_field_size, &i_size, 4 );
1541 tag = hton16( tag );
1542 p_field = memmem( p, sync.length - (size_t)(p - p_frame), &tag, 2 );
1546 i_size = (uint32_t)(p_field - p_frame);
1547 i_size = hton32( i_size );
1548 memcpy( &p_app1->i_next_field, &i_size, 4 );
1551 p_app1 = (struct quicktime_mjpeg_app1 *)(p_field + 6);
1553 tag = hton16( tag );
1554 p = memmem( p_field, sync.length - (size_t)(p_field - p_frame),
1559 /* sometimes the second field doesn't have the EOI. just put it
1562 p = p_frame + sync.length;
1563 memcpy( p, &tag, 2 );
1568 i_size = (uint32_t)(p - p_field);
1569 i_size = hton32( i_size );
1570 memcpy( &p_app1->i_field_size, &i_size, 4 );
1571 i_size = (uint32_t)(sync.length - (uint32_t)(p_field - p_frame));
1572 i_size = hton32( i_size );
1573 memcpy( &p_app1->i_padded_field_size, &i_size, 4 );
1576 p_sys->i_video_frame_size = sync.length;
1580 static block_t *GrabVideo( demux_t *p_demux )
1582 demux_sys_t *p_sys = p_demux->p_sys;
1586 if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
1588 mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
1590 /* Did we wait long enough ? (frame rate reduction) */
1591 if( p_sys->i_video_pts + i_dur > mdate() ) return 0;
1594 if( p_sys->b_mjpeg ) p_frame = GrabMJPEG( p_demux );
1595 else p_frame = GrabCapture( p_demux );
1597 if( !p_frame ) return 0;
1599 if( !( p_block = block_New( p_demux, p_sys->i_video_frame_size ) ) )
1601 msg_Warn( p_demux, "cannot get block" );
1605 memcpy( p_block->p_buffer, p_frame, p_sys->i_video_frame_size );
1606 p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();