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/*****************************************************************************
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* v4l.c : Video4Linux input module for vlc
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*****************************************************************************
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* Copyright (C) 2002-2004 the VideoLAN team
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* $Id: 3d7602ef23e6addd0241011d4851351668c5c46d $
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* Author: Laurent Aimar <fenrir@via.ecp.fr>
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* Paul Forgey <paulf at aphrodite dot com>
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* Gildas Bazin <gbazin@videolan.org>
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* Benjamin Pracht <bigben at videolan dot org>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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/*****************************************************************************
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*****************************************************************************/
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#include <vlc/input.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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/* From GStreamer's v4l plugin:
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* Because of some really cool feature in video4linux1, also known as
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* 'not including sys/types.h and sys/time.h', we had to include it
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* ourselves. In all their intelligence, these people decided to fix
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* this in the next version (video4linux2) in such a cool way that it
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* breaks all compilations of old stuff...
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* The real problem is actually that linux/time.h doesn't use proper
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* macro checks before defining types like struct timeval. The proper
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* fix here is to either fuck the kernel header (which is what we do
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* by defining _LINUX_TIME_H, an innocent little hack) or by fixing it
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* upstream, which I'll consider doing later on. If you get compiler
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* errors here, check your linux/time.h && sys/time.h header setup.
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#include <linux/videodev.h>
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#include "videodev_mjpeg.h"
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#include <sys/soundcard.h>
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/*****************************************************************************
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*****************************************************************************/
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static int Open ( vlc_object_t * );
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static void Close( vlc_object_t * );
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#define CACHING_TEXT N_("Caching value in ms")
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#define CACHING_LONGTEXT N_( \
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"Caching value for V4L captures. This " \
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"value should be set in milliseconds." )
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#define VDEV_TEXT N_("Video device name")
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#define VDEV_LONGTEXT N_( \
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"Name of the video device to use. " \
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"If you don't specify anything, no video device will be used.")
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#define ADEV_TEXT N_("Audio device name")
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#define ADEV_LONGTEXT N_( \
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"Name of the audio device to use. " \
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"If you don't specify anything, no audio device will be used.")
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#define CHROMA_TEXT N_("Video input chroma format")
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#define CHROMA_LONGTEXT N_( \
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"Force the Video4Linux video device to use a specific chroma format " \
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"(eg. I420 (default), RV24, etc.)")
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#define FREQUENCY_TEXT N_( "Frequency" )
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#define FREQUENCY_LONGTEXT N_( \
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"Frequency to capture (in kHz), if applicable." )
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#define CHANNEL_TEXT N_( "Channel" )
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#define CHANNEL_LONGTEXT N_( \
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"Channel of the card to use (Usually, 0 = tuner, " \
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"1 = composite, 2 = svideo)." )
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#define NORM_TEXT N_( "Norm" )
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#define NORM_LONGTEXT N_( \
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"Norm of the stream (Automatic, SECAM, PAL, or NTSC)." )
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#define AUDIO_TEXT N_( "Audio Channel" )
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#define AUDIO_LONGTEXT N_( \
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"Audio Channel to use, if there are several audio inputs." )
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#define WIDTH_TEXT N_( "Width" )
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#define WIDTH_LONGTEXT N_( "Width of the stream to capture " \
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"(-1 for autodetect)." )
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#define HEIGHT_TEXT N_( "Height" )
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#define HEIGHT_LONGTEXT N_( "Height of the stream to capture " \
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"(-1 for autodetect)." )
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#define BRIGHTNESS_TEXT N_( "Brightness" )
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#define BRIGHTNESS_LONGTEXT N_( \
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"Brightness of the video input." )
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#define HUE_TEXT N_( "Hue" )
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#define HUE_LONGTEXT N_( \
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"Hue of the video input." )
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#define COLOUR_TEXT N_( "Color" )
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#define COLOUR_LONGTEXT N_( \
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"Color of the video input." )
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#define CONTRAST_TEXT N_( "Contrast" )
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#define CONTRAST_LONGTEXT N_( \
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"Contrast of the video input." )
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#define TUNER_TEXT N_( "Tuner" )
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#define TUNER_LONGTEXT N_( "Tuner to use, if there are several ones." )
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#define SAMPLERATE_TEXT N_( "Samplerate" )
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#define SAMPLERATE_LONGTEXT N_( \
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"Samplerate of the captured audio stream, in Hz (eg: 11025, 22050, 44100)" )
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#define STEREO_TEXT N_( "Stereo" )
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#define STEREO_LONGTEXT N_( \
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"Capture the audio stream in stereo." )
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#define MJPEG_TEXT N_( "MJPEG" )
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#define MJPEG_LONGTEXT N_( \
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"Set this option if the capture device outputs MJPEG" )
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#define DECIMATION_TEXT N_( "Decimation" )
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#define DECIMATION_LONGTEXT N_( \
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"Decimation level for MJPEG streams" )
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#define QUALITY_TEXT N_( "Quality" )
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#define QUALITY_LONGTEXT N_( "Quality of the stream." )
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#define FPS_TEXT N_( "Framerate" )
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#define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
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"(-1 for autodetect)." )
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static int i_norm_list[] =
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{ VIDEO_MODE_AUTO, VIDEO_MODE_SECAM, VIDEO_MODE_PAL, VIDEO_MODE_NTSC };
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static char *psz_norm_list_text[] =
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{ N_("Automatic"), N_("SECAM"), N_("PAL"), N_("NTSC") };
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set_shortname( _("Video4Linux") );
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set_description( _("Video4Linux input") );
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set_category( CAT_INPUT );
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set_subcategory( SUBCAT_INPUT_ACCESS );
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add_integer( "v4l-caching", DEFAULT_PTS_DELAY / 1000, NULL,
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CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
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add_string( "v4l-vdev", "/dev/video", 0, VDEV_TEXT, VDEV_LONGTEXT,
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add_string( "v4l-adev", "/dev/dsp", 0, ADEV_TEXT, ADEV_LONGTEXT,
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add_string( "v4l-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
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add_float( "v4l-fps", -1.0, NULL, FPS_TEXT, FPS_LONGTEXT, VLC_TRUE );
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add_integer( "v4l-samplerate", 44100, NULL, SAMPLERATE_TEXT,
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SAMPLERATE_LONGTEXT, VLC_TRUE );
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add_integer( "v4l-channel", 0, NULL, CHANNEL_TEXT, CHANNEL_LONGTEXT,
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add_integer( "v4l-tuner", -1, NULL, TUNER_TEXT, TUNER_LONGTEXT, VLC_TRUE );
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add_integer( "v4l-norm", VIDEO_MODE_AUTO, NULL, NORM_TEXT, NORM_LONGTEXT,
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change_integer_list( i_norm_list, psz_norm_list_text, 0 );
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add_integer( "v4l-frequency", -1, NULL, FREQUENCY_TEXT, FREQUENCY_LONGTEXT,
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add_integer( "v4l-audio", -1, NULL, AUDIO_TEXT, AUDIO_LONGTEXT, VLC_TRUE );
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add_bool( "v4l-stereo", VLC_TRUE, NULL, STEREO_TEXT, STEREO_LONGTEXT,
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add_integer( "v4l-width", 0, NULL, WIDTH_TEXT, WIDTH_LONGTEXT, VLC_TRUE );
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add_integer( "v4l-height", 0, NULL, HEIGHT_TEXT, HEIGHT_LONGTEXT,
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add_integer( "v4l-brightness", -1, NULL, BRIGHTNESS_TEXT,
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BRIGHTNESS_LONGTEXT, VLC_TRUE );
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add_integer( "v4l-colour", -1, NULL, COLOUR_TEXT, COLOUR_LONGTEXT,
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add_integer( "v4l-hue", -1, NULL, HUE_TEXT, HUE_LONGTEXT, VLC_TRUE );
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add_integer( "v4l-contrast", -1, NULL, CONTRAST_TEXT, CONTRAST_LONGTEXT,
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add_bool( "v4l-mjpeg", VLC_FALSE, NULL, MJPEG_TEXT, MJPEG_LONGTEXT,
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add_integer( "v4l-decimation", 1, NULL, DECIMATION_TEXT,
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DECIMATION_LONGTEXT, VLC_TRUE );
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add_integer( "v4l-quality", 100, NULL, QUALITY_TEXT, QUALITY_LONGTEXT,
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add_shortcut( "v4l" );
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set_capability( "access_demux", 10 );
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set_callbacks( Open, Close );
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/*****************************************************************************
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* Access: local prototypes
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*****************************************************************************/
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static int Demux ( demux_t * );
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static int Control( demux_t *, int, va_list );
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static void ParseMRL ( demux_t * );
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static int OpenVideoDev( demux_t *, char * );
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static int OpenAudioDev( demux_t *, char * );
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static block_t *GrabAudio( demux_t * );
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static block_t *GrabVideo( demux_t * );
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#define MJPEG_BUFFER_SIZE (256*1024)
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struct quicktime_mjpeg_app1
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uint32_t i_reserved; /* set to 0 */
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uint32_t i_tag; /* 'mjpg' */
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uint32_t i_field_size; /* offset following EOI */
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uint32_t i_padded_field_size; /* offset following EOI+pad */
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uint32_t i_next_field; /* offset to next field */
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uint32_t i_DQT_offset;
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uint32_t i_DHT_offset;
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uint32_t i_SOF_offset;
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uint32_t i_SOS_offset;
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uint32_t i_data_offset; /* following SOS marker data */
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} v4lchroma_to_fourcc[] =
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{ VIDEO_PALETTE_GREY, VLC_FOURCC( 'G', 'R', 'E', 'Y' ) },
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{ VIDEO_PALETTE_HI240, VLC_FOURCC( 'I', '2', '4', '0' ) },
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{ VIDEO_PALETTE_RGB565, VLC_FOURCC( 'R', 'V', '1', '6' ) },
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{ VIDEO_PALETTE_RGB555, VLC_FOURCC( 'R', 'V', '1', '5' ) },
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{ VIDEO_PALETTE_RGB24, VLC_FOURCC( 'R', 'V', '2', '4' ) },
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{ VIDEO_PALETTE_RGB32, VLC_FOURCC( 'R', 'V', '3', '2' ) },
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{ VIDEO_PALETTE_YUV422, VLC_FOURCC( 'I', '4', '2', '2' ) },
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{ VIDEO_PALETTE_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', 'V' ) },
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{ VIDEO_PALETTE_UYVY, VLC_FOURCC( 'U', 'Y', 'V', 'Y' ) },
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{ VIDEO_PALETTE_YUV420, VLC_FOURCC( 'I', '4', '2', 'N' ) },
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{ VIDEO_PALETTE_YUV411, VLC_FOURCC( 'I', '4', '1', 'N' ) },
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{ VIDEO_PALETTE_RAW, VLC_FOURCC( 'G', 'R', 'A', 'W' ) },
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{ VIDEO_PALETTE_YUV422P, VLC_FOURCC( 'I', '4', '2', '2' ) },
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{ VIDEO_PALETTE_YUV420P, VLC_FOURCC( 'I', '4', '2', '0' ) },
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{ VIDEO_PALETTE_YUV411P, VLC_FOURCC( 'I', '4', '1', '1' ) },
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char *psz_device; /* Main device from MRL, can be video or audio */
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/* Video properties */
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float f_fps; /* <= 0.0 mean to grab at full rate */
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mtime_t i_video_pts; /* only used when f_fps > 0 */
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struct video_capability vid_cap;
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struct video_mbuf vid_mbuf;
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struct mjpeg_requestbuffers mjpeg_buffers;
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uint8_t *p_video_mmap;
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struct video_mmap vid_mmap;
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struct video_picture vid_picture;
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int i_video_frame_size;
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es_out_id_t *p_es_video;
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/* Audio properties */
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vlc_fourcc_t i_acodec_raw;
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int i_audio_max_frame_size;
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block_t *p_block_audio;
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es_out_id_t *p_es_audio;
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/*****************************************************************************
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* Open: opens v4l device
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*****************************************************************************
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* url: <video device>::::
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*****************************************************************************/
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static int Open( vlc_object_t *p_this )
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demux_t *p_demux = (demux_t*)p_this;
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/* Only when selected */
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if( *p_demux->psz_access == '\0' )
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p_demux->pf_demux = Demux;
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p_demux->pf_control = Control;
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p_demux->info.i_update = 0;
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p_demux->info.i_title = 0;
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p_demux->info.i_seekpoint = 0;
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p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
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memset( p_sys, 0, sizeof( demux_sys_t ) );
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var_Create( p_demux, "v4l-audio", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
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var_Get( p_demux, "v4l-audio", &val );
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p_sys->i_audio = val.i_int;
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var_Create( p_demux, "v4l-channel", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
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var_Get( p_demux, "v4l-channel", &val );
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p_sys->i_channel = val.i_int;
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var_Create( p_demux, "v4l-norm", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
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var_Get( p_demux, "v4l-norm", &val );
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p_sys->i_norm = val.i_int;
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var_Create( p_demux, "v4l-tuner", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
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var_Get( p_demux, "v4l-tuner", &val );
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p_sys->i_tuner = val.i_int;
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var_Create( p_demux, "v4l-frequency",
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VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
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var_Get( p_demux, "v4l-frequency", &val );
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p_sys->i_frequency = val.i_int;
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var_Create( p_demux, "v4l-fps", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
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var_Get( p_demux, "v4l-fps", &val );
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p_sys->f_fps = val.f_float;
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var_Create( p_demux, "v4l-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
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var_Get( p_demux, "v4l-width", &val );
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p_sys->i_width = val.i_int;
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var_Create( p_demux, "v4l-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
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var_Get( p_demux, "v4l-height", &val );
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p_sys->i_height = val.i_int;
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p_sys->i_video_pts = -1;
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var_Create( p_demux, "v4l-brightness", VLC_VAR_INTEGER |
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var_Get( p_demux, "v4l-brightness", &val );
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p_sys->i_brightness = val.i_int;
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var_Create( p_demux, "v4l-hue", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
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var_Get( p_demux, "v4l-hue", &val );
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var_Create( p_demux, "v4l-colour", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
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var_Get( p_demux, "v4l-colour", &val );
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p_sys->i_colour = val.i_int;
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var_Create( p_demux, "v4l-contrast", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
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var_Get( p_demux, "v4l-contrast", &val );
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p_sys->i_contrast = val.i_int;
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var_Create( p_demux, "v4l-mjpeg", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
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var_Get( p_demux, "v4l-mjpeg", &val );
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p_sys->b_mjpeg = val.b_bool;
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var_Create( p_demux, "v4l-decimation", VLC_VAR_INTEGER |
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var_Get( p_demux, "v4l-decimation", &val );
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p_sys->i_decimation = val.i_int;
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var_Create( p_demux, "v4l-quality", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
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var_Get( p_demux, "v4l-quality", &val );
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p_sys->i_quality = val.i_int;
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var_Create( p_demux, "v4l-samplerate",
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VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
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var_Get( p_demux, "v4l-samplerate", &val );
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p_sys->i_sample_rate = val.i_int;
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var_Create( p_demux, "v4l-stereo", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
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var_Get( p_demux, "v4l-stereo", &val );
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p_sys->b_stereo = val.b_bool;
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p_sys->psz_device = p_sys->psz_vdev = p_sys->psz_adev = NULL;
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p_sys->fd_video = -1;
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p_sys->fd_audio = -1;
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p_sys->p_es_video = p_sys->p_es_audio = 0;
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p_sys->p_block_audio = 0;
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/* Find main device (video or audio) */
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if( p_sys->psz_device && *p_sys->psz_device )
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msg_Dbg( p_demux, "main device=`%s'", p_sys->psz_device );
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/* Try to open as video device */
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p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_device );
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if( p_sys->fd_video < 0 )
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/* Try to open as audio device */
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p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_device );
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if( p_sys->fd_audio >= 0 )
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if( p_sys->psz_adev ) free( p_sys->psz_adev );
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p_sys->psz_adev = p_sys->psz_device;
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p_sys->psz_device = NULL;
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if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
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p_sys->psz_vdev = p_sys->psz_device;
438
p_sys->psz_device = NULL;
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/* If no device opened, only continue if the access was forced */
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if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
445
if( strcmp( p_demux->psz_access, "v4l" ) )
452
/* Find video device */
453
if( p_sys->fd_video < 0 )
455
if( !p_sys->psz_vdev || !*p_sys->psz_vdev )
457
if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
458
p_sys->psz_vdev = var_CreateGetString( p_demux, "v4l-vdev" );;
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if( p_sys->psz_vdev && *p_sys->psz_vdev )
463
p_sys->fd_video = OpenVideoDev( p_demux, p_sys->psz_vdev );
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/* Find audio device */
468
if( p_sys->fd_audio < 0 )
470
if( !p_sys->psz_adev || !*p_sys->psz_adev )
472
if( p_sys->psz_adev ) free( p_sys->psz_adev );
473
p_sys->psz_adev = var_CreateGetString( p_demux, "v4l-adev" );;
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if( p_sys->psz_adev && *p_sys->psz_adev )
478
p_sys->fd_audio = OpenAudioDev( p_demux, p_sys->psz_adev );
482
if( p_sys->fd_video < 0 && p_sys->fd_audio < 0 )
488
msg_Dbg( p_demux, "v4l grabbing started" );
490
/* Declare elementary streams */
491
if( p_sys->fd_video >= 0 )
494
es_format_Init( &fmt, VIDEO_ES, p_sys->i_fourcc );
495
fmt.video.i_width = p_sys->i_width;
496
fmt.video.i_height = p_sys->i_height;
497
fmt.video.i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
499
/* Setup rgb mask for RGB formats */
500
if( p_sys->i_fourcc == VLC_FOURCC('R','V','2','4') )
502
/* This is in BGR format */
503
fmt.video.i_bmask = 0x00ff0000;
504
fmt.video.i_gmask = 0x0000ff00;
505
fmt.video.i_rmask = 0x000000ff;
508
msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
509
(char*)&fmt.i_codec, fmt.video.i_width, fmt.video.i_height );
510
p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
513
if( p_sys->fd_audio >= 0 )
516
es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC('a','r','a','w') );
518
fmt.audio.i_channels = p_sys->b_stereo ? 2 : 1;
519
fmt.audio.i_rate = p_sys->i_sample_rate;
520
fmt.audio.i_bitspersample = 16; // FIXME ?
521
fmt.audio.i_blockalign = fmt.audio.i_channels *
522
fmt.audio.i_bitspersample / 8;
523
fmt.i_bitrate = fmt.audio.i_channels * fmt.audio.i_rate *
524
fmt.audio.i_bitspersample;
526
msg_Dbg( p_demux, "new audio es %d channels %dHz",
527
fmt.audio.i_channels, fmt.audio.i_rate );
529
p_sys->p_es_audio = es_out_Add( p_demux->out, &fmt );
532
/* Update default_pts to a suitable value for access */
533
var_Create( p_demux, "v4l-caching", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
538
/*****************************************************************************
539
* Close: close device, free resources
540
*****************************************************************************/
541
static void Close( vlc_object_t *p_this )
543
demux_t *p_demux = (demux_t *)p_this;
544
demux_sys_t *p_sys = p_demux->p_sys;
546
if( p_sys->psz_device ) free( p_sys->psz_device );
547
if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
548
if( p_sys->psz_adev ) free( p_sys->psz_adev );
549
if( p_sys->fd_video >= 0 ) close( p_sys->fd_video );
550
if( p_sys->fd_audio >= 0 ) close( p_sys->fd_audio );
551
if( p_sys->p_block_audio ) block_Release( p_sys->p_block_audio );
556
ioctl( p_sys->fd_video, MJPIOC_QBUF_CAPT, &i_noframe );
559
if( p_sys->p_video_mmap && p_sys->p_video_mmap != MAP_FAILED )
562
munmap( p_sys->p_video_mmap, p_sys->mjpeg_buffers.size *
563
p_sys->mjpeg_buffers.count );
565
munmap( p_sys->p_video_mmap, p_sys->vid_mbuf.size );
571
/*****************************************************************************
573
*****************************************************************************/
574
static int Control( demux_t *p_demux, int i_query, va_list args )
581
/* Special for access_demux */
582
case DEMUX_CAN_PAUSE:
583
case DEMUX_SET_PAUSE_STATE:
584
case DEMUX_CAN_CONTROL_PACE:
585
pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
589
case DEMUX_GET_PTS_DELAY:
590
pi64 = (int64_t*)va_arg( args, int64_t * );
591
*pi64 = (int64_t)var_GetInteger( p_demux, "v4l-caching" ) * 1000;
595
pi64 = (int64_t*)va_arg( args, int64_t * );
599
/* TODO implement others */
607
/*****************************************************************************
609
*****************************************************************************/
610
static int Demux( demux_t *p_demux )
612
demux_sys_t *p_sys = p_demux->p_sys;
613
es_out_id_t *p_es = p_sys->p_es_audio;
614
block_t *p_block = NULL;
616
/* Try grabbing audio frames first */
617
if( p_sys->fd_audio < 0 || !( p_block = GrabAudio( p_demux ) ) )
619
/* Try grabbing video frame */
620
p_es = p_sys->p_es_video;
621
if( p_sys->fd_video > 0 ) p_block = GrabVideo( p_demux );
626
/* Sleep so we do not consume all the cpu, 10ms seems
627
* like a good value (100fps) */
632
es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
633
es_out_Send( p_demux->out, p_es, p_block );
638
/*****************************************************************************
639
* ParseMRL: parse the options contained in the MRL
640
*****************************************************************************/
641
static void ParseMRL( demux_t *p_demux )
643
demux_sys_t *p_sys = p_demux->p_sys;
645
char *psz_dup = strdup( p_demux->psz_path );
646
char *psz_parser = psz_dup;
648
while( *psz_parser && *psz_parser != ':' )
653
if( *psz_parser == ':' )
658
*psz_parser++ = '\0';
659
if( !strncmp( psz_parser, "channel=", strlen( "channel=" ) ) )
661
p_sys->i_channel = strtol( psz_parser + strlen( "channel=" ),
664
else if( !strncmp( psz_parser, "norm=", strlen( "norm=" ) ) )
666
psz_parser += strlen( "norm=" );
667
if( !strncmp( psz_parser, "pal", strlen( "pal" ) ) )
669
p_sys->i_norm = VIDEO_MODE_PAL;
670
psz_parser += strlen( "pal" );
672
else if( !strncmp( psz_parser, "ntsc", strlen( "ntsc" ) ) )
674
p_sys->i_norm = VIDEO_MODE_NTSC;
675
psz_parser += strlen( "ntsc" );
677
else if( !strncmp( psz_parser, "secam", strlen( "secam" ) ) )
679
p_sys->i_norm = VIDEO_MODE_SECAM;
680
psz_parser += strlen( "secam" );
682
else if( !strncmp( psz_parser, "auto", strlen( "auto" ) ) )
684
p_sys->i_norm = VIDEO_MODE_AUTO;
685
psz_parser += strlen( "auto" );
689
p_sys->i_norm = strtol( psz_parser, &psz_parser, 0 );
692
else if( !strncmp( psz_parser, "frequency=",
693
strlen( "frequency=" ) ) )
696
strtol( psz_parser + strlen( "frequency=" ),
698
if( p_sys->i_frequency < 30000 )
700
msg_Warn( p_demux, "v4l syntax has changed : "
701
"'frequency' is now channel frequency in kHz");
704
else if( !strncmp( psz_parser, "audio=", strlen( "audio=" ) ) )
706
p_sys->i_audio = strtol( psz_parser + strlen( "audio=" ),
709
else if( !strncmp( psz_parser, "size=", strlen( "size=" ) ) )
711
psz_parser += strlen( "size=" );
712
if( !strncmp( psz_parser, "subqcif", strlen( "subqcif" ) ) )
714
p_sys->i_width = 128;
715
p_sys->i_height = 96;
717
else if( !strncmp( psz_parser, "qsif", strlen( "qsif" ) ) )
719
p_sys->i_width = 160;
720
p_sys->i_height = 120;
722
else if( !strncmp( psz_parser, "qcif", strlen( "qcif" ) ) )
724
p_sys->i_width = 176;
725
p_sys->i_height = 144;
727
else if( !strncmp( psz_parser, "sif", strlen( "sif" ) ) )
729
p_sys->i_width = 320;
730
p_sys->i_height = 244;
732
else if( !strncmp( psz_parser, "cif", strlen( "cif" ) ) )
734
p_sys->i_width = 352;
735
p_sys->i_height = 288;
737
else if( !strncmp( psz_parser, "vga", strlen( "vga" ) ) )
739
p_sys->i_width = 640;
740
p_sys->i_height = 480;
745
p_sys->i_width = strtol( psz_parser, &psz_parser, 0 );
746
if( *psz_parser == 'x' || *psz_parser == 'X')
748
p_sys->i_height = strtol( psz_parser + 1,
751
msg_Dbg( p_demux, "WxH %dx%d", p_sys->i_width,
755
else if( !strncmp( psz_parser, "brightness=", strlen( "brightness=" ) ) )
757
p_sys->i_brightness = strtol( psz_parser + strlen( "brightness=" ),
760
else if( !strncmp( psz_parser, "colour=", strlen( "colour=" ) ) )
762
p_sys->i_colour = strtol( psz_parser + strlen( "colour=" ),
765
else if( !strncmp( psz_parser, "hue=", strlen( "hue=" ) ) )
767
p_sys->i_hue = strtol( psz_parser + strlen( "hue=" ),
770
else if( !strncmp( psz_parser, "contrast=", strlen( "contrast=" ) ) )
772
p_sys->i_contrast = strtol( psz_parser + strlen( "contrast=" ),
775
else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
777
p_sys->i_tuner = strtol( psz_parser + strlen( "tuner=" ),
780
else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) ) )
784
psz_parser += strlen( "adev=" );
785
if( strchr( psz_parser, ':' ) )
787
i_len = strchr( psz_parser, ':' ) - psz_parser;
791
i_len = strlen( psz_parser );
794
p_sys->psz_adev = strndup( psz_parser, i_len );
798
else if( !strncmp( psz_parser, "samplerate=",
799
strlen( "samplerate=" ) ) )
801
p_sys->i_sample_rate =
802
strtol( psz_parser + strlen( "samplerate=" ),
805
else if( !strncmp( psz_parser, "stereo", strlen( "stereo" ) ) )
807
psz_parser += strlen( "stereo" );
809
p_sys->b_stereo = VLC_TRUE;
811
else if( !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
813
psz_parser += strlen( "mono" );
815
p_sys->b_stereo = VLC_FALSE;
817
else if( !strncmp( psz_parser, "mjpeg", strlen( "mjpeg" ) ) )
819
psz_parser += strlen( "mjpeg" );
821
p_sys->b_mjpeg = VLC_TRUE;
823
else if( !strncmp( psz_parser, "decimation=",
824
strlen( "decimation=" ) ) )
826
p_sys->i_decimation =
827
strtol( psz_parser + strlen( "decimation=" ),
830
else if( !strncmp( psz_parser, "quality=",
831
strlen( "quality=" ) ) )
834
strtol( psz_parser + strlen( "quality=" ),
837
else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
839
p_sys->f_fps = strtof( psz_parser + strlen( "fps=" ),
844
msg_Warn( p_demux, "unknown option" );
847
while( *psz_parser && *psz_parser != ':' )
852
if( *psz_parser == '\0' )
861
p_sys->psz_device = strdup( psz_dup );
863
if( psz_dup ) free( psz_dup );
866
/*****************************************************************************
868
*****************************************************************************/
869
static int OpenVideoDev( demux_t *p_demux, char *psz_device )
871
demux_sys_t *p_sys = p_demux->p_sys;
874
struct video_channel vid_channel;
875
struct mjpeg_params mjpeg;
878
if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
880
msg_Err( p_demux, "cannot open device (%s)", strerror( errno ) );
884
if( ioctl( i_fd, VIDIOCGCAP, &p_sys->vid_cap ) < 0 )
886
msg_Err( p_demux, "cannot get capabilities (%s)", strerror( errno ) );
891
"V4L device %s %d channels %d audios %d < w < %d %d < h < %d",
893
p_sys->vid_cap.channels,
894
p_sys->vid_cap.audios,
895
p_sys->vid_cap.minwidth, p_sys->vid_cap.maxwidth,
896
p_sys->vid_cap.minheight, p_sys->vid_cap.maxheight );
898
if( p_sys->i_channel < 0 || p_sys->i_channel >= p_sys->vid_cap.channels )
900
msg_Dbg( p_demux, "invalid channel, falling back on channel 0" );
901
p_sys->i_channel = 0;
903
if( p_sys->vid_cap.audios && p_sys->i_audio >= p_sys->vid_cap.audios )
905
msg_Dbg( p_demux, "invalid audio, falling back with no audio" );
909
if( p_sys->i_width < p_sys->vid_cap.minwidth ||
910
p_sys->i_width > p_sys->vid_cap.maxwidth )
912
msg_Dbg( p_demux, "invalid width %i", p_sys->i_width );
915
if( p_sys->i_height < p_sys->vid_cap.minheight ||
916
p_sys->i_height > p_sys->vid_cap.maxheight )
918
msg_Dbg( p_demux, "invalid height %i", p_sys->i_height );
922
if( !( p_sys->vid_cap.type & VID_TYPE_CAPTURE ) )
924
msg_Err( p_demux, "cannot grab" );
928
vid_channel.channel = p_sys->i_channel;
929
if( ioctl( i_fd, VIDIOCGCHAN, &vid_channel ) < 0 )
931
msg_Err( p_demux, "cannot get channel infos (%s)",
936
"setting channel %s(%d) %d tuners flags=0x%x type=0x%x norm=0x%x",
937
vid_channel.name, vid_channel.channel, vid_channel.tuners,
938
vid_channel.flags, vid_channel.type, vid_channel.norm );
940
if( p_sys->i_tuner >= vid_channel.tuners )
942
msg_Dbg( p_demux, "invalid tuner, falling back on tuner 0" );
946
vid_channel.norm = p_sys->i_norm;
947
if( ioctl( i_fd, VIDIOCSCHAN, &vid_channel ) < 0 )
949
msg_Err( p_demux, "cannot set channel (%s)", strerror( errno ) );
953
if( vid_channel.flags & VIDEO_VC_TUNER )
958
struct video_tuner vid_tuner;
959
if( p_sys->i_tuner >= 0 )
961
vid_tuner.tuner = p_sys->i_tuner;
962
if( ioctl( i_fd, VIDIOCGTUNER, &vid_tuner ) < 0 )
964
msg_Err( p_demux, "cannot get tuner (%s)", strerror( errno ) );
967
msg_Dbg( p_demux, "tuner %s low=%d high=%d, flags=0x%x "
968
"mode=0x%x signal=0x%x",
969
vid_tuner.name, vid_tuner.rangelow, vid_tuner.rangehigh,
970
vid_tuner.flags, vid_tuner.mode, vid_tuner.signal );
972
msg_Dbg( p_demux, "setting tuner %s (%d)",
973
vid_tuner.name, vid_tuner.tuner );
975
/* FIXME FIXME to be checked FIXME FIXME */
976
//vid_tuner.mode = p_sys->i_norm;
977
if( ioctl( i_fd, VIDIOCSTUNER, &vid_tuner ) < 0 )
979
msg_Err( p_demux, "cannot set tuner (%s)", strerror( errno ) );
985
/* Show a warning if frequency is < than 30000.
986
* User is certainly usint old syntax. */
990
if( p_sys->i_frequency >= 0 )
992
int driver_frequency = p_sys->i_frequency * 16 /1000;
993
if( ioctl( i_fd, VIDIOCSFREQ, &driver_frequency ) < 0 )
995
msg_Err( p_demux, "cannot set frequency (%s)",
999
msg_Dbg( p_demux, "frequency %d (%d)", p_sys->i_frequency,
1005
if( vid_channel.flags & VIDEO_VC_AUDIO )
1007
struct video_audio vid_audio;
1009
/* XXX TODO volume, balance, ... */
1010
if( p_sys->i_audio >= 0 )
1012
vid_audio.audio = p_sys->i_audio;
1013
if( ioctl( i_fd, VIDIOCGAUDIO, &vid_audio ) < 0 )
1015
msg_Err( p_demux, "cannot get audio (%s)", strerror( errno ) );
1020
vid_audio.flags &= ~VIDEO_AUDIO_MUTE;
1022
if( ioctl( i_fd, VIDIOCSAUDIO, &vid_audio ) < 0 )
1024
msg_Err( p_demux, "cannot set audio (%s)", strerror( errno ) );
1031
/* establish basic params with input and norm before feeling width
1033
if( p_sys->b_mjpeg )
1035
struct quicktime_mjpeg_app1 *p_app1;
1038
if( ioctl( i_fd, MJPIOC_G_PARAMS, &mjpeg ) < 0 )
1040
msg_Err( p_demux, "cannot get mjpeg params (%s)",
1041
strerror( errno ) );
1044
mjpeg.input = p_sys->i_channel;
1045
mjpeg.norm = p_sys->i_norm;
1046
mjpeg.decimation = p_sys->i_decimation;
1048
if( p_sys->i_width )
1049
mjpeg.img_width = p_sys->i_width / p_sys->i_decimation;
1050
if( p_sys->i_height )
1051
mjpeg.img_height = p_sys->i_height / p_sys->i_decimation;
1053
/* establish Quicktime APP1 marker while we are here */
1058
p_app1 = (struct quicktime_mjpeg_app1 *)mjpeg.APP_data;
1059
p_app1->i_reserved = 0;
1060
p_app1->i_tag = VLC_FOURCC( 'm','j','p','g' );
1061
p_app1->i_field_size = 0;
1062
p_app1->i_padded_field_size = 0;
1063
p_app1->i_next_field = 0;
1064
/* XXX WARNING XXX */
1065
/* these's nothing magic about these values. We are dangerously
1066
* assuming the encoder card is encoding mjpeg-a and is not throwing
1067
* in marker tags we aren't expecting. It's bad enough we have to
1068
* search through the jpeg output for every frame we grab just to
1069
* find the first field's end marker, so we take this risk to boost
1071
* This is really something the driver could do for us because this
1072
* does conform to standards outside of Apple Quicktime.
1075
p_app1->i_DQT_offset = hton32( i_offset );
1077
p_app1->i_DHT_offset = hton32( i_offset );
1079
p_app1->i_SOF_offset = hton32( i_offset );
1081
p_app1->i_SOS_offset = hton32( i_offset );
1083
p_app1->i_data_offset = hton32( i_offset );
1085
/* SOF and SOS aren't specified by the mjpeg API because they aren't
1086
* optional. They will be present in the output. */
1087
mjpeg.jpeg_markers = JPEG_MARKER_DHT | JPEG_MARKER_DQT;
1089
if( ioctl( i_fd, MJPIOC_S_PARAMS, &mjpeg ) < 0 )
1091
msg_Err( p_demux, "cannot set mjpeg params (%s)",
1092
strerror( errno ) );
1096
p_sys->i_width = mjpeg.img_width * mjpeg.HorDcm;
1097
p_sys->i_height = mjpeg.img_height * mjpeg.VerDcm *
1098
mjpeg.field_per_buff;
1101
/* fix width/height */
1102
if( !p_sys->b_mjpeg && ( p_sys->i_width == 0 || p_sys->i_height == 0 ) )
1104
struct video_window vid_win;
1106
if( ioctl( i_fd, VIDIOCGWIN, &vid_win ) < 0 )
1108
msg_Err( p_demux, "cannot get win (%s)", strerror( errno ) );
1111
p_sys->i_width = vid_win.width;
1112
p_sys->i_height = vid_win.height;
1114
if( !p_sys->i_width || !p_sys->i_height )
1116
p_sys->i_width = p_sys->vid_cap.maxwidth;
1117
p_sys->i_height = p_sys->vid_cap.maxheight;
1120
if( !p_sys->i_width || !p_sys->i_height )
1122
msg_Err( p_demux, "invalid video size (%ix%i)",
1123
p_sys->i_width, p_sys->i_height );
1127
msg_Dbg( p_demux, "will use %dx%d", p_sys->i_width, p_sys->i_height );
1130
if( !p_sys->b_mjpeg )
1132
/* set hue/color/.. */
1133
if( ioctl( i_fd, VIDIOCGPICT, &p_sys->vid_picture ) == 0 )
1135
struct video_picture vid_picture = p_sys->vid_picture;
1137
if( p_sys->i_brightness >= 0 && p_sys->i_brightness < 65536 )
1139
vid_picture.brightness = p_sys->i_brightness;
1141
if( p_sys->i_colour >= 0 && p_sys->i_colour < 65536 )
1143
vid_picture.colour = p_sys->i_colour;
1145
if( p_sys->i_hue >= 0 && p_sys->i_hue < 65536 )
1147
vid_picture.hue = p_sys->i_hue;
1149
if( p_sys->i_contrast >= 0 && p_sys->i_contrast < 65536 )
1151
vid_picture.contrast = p_sys->i_contrast;
1153
if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1155
msg_Dbg( p_demux, "v4l device uses brightness: %d",
1156
vid_picture.brightness );
1157
msg_Dbg( p_demux, "v4l device uses colour: %d",
1158
vid_picture.colour );
1159
msg_Dbg( p_demux, "v4l device uses hue: %d", vid_picture.hue );
1160
msg_Dbg( p_demux, "v4l device uses contrast: %d",
1161
vid_picture.contrast );
1162
p_sys->vid_picture = vid_picture;
1166
/* Find out video format used by device */
1167
if( ioctl( i_fd, VIDIOCGPICT, &p_sys->vid_picture ) == 0 )
1169
struct video_picture vid_picture = p_sys->vid_picture;
1173
vid_picture.palette = 0;
1174
p_sys->i_fourcc = 0;
1176
psz = var_CreateGetString( p_demux, "v4l-chroma" );
1177
if( strlen( psz ) >= 4 )
1179
int i_chroma = VLC_FOURCC( psz[0], psz[1], psz[2], psz[3] );
1181
/* Find out v4l chroma code */
1182
for( i = 0; v4lchroma_to_fourcc[i].i_v4l != 0; i++ )
1184
if( v4lchroma_to_fourcc[i].i_fourcc == i_chroma )
1186
vid_picture.palette = v4lchroma_to_fourcc[i].i_v4l;
1193
if( vid_picture.palette &&
1194
!ioctl( i_fd, VIDIOCSPICT, &vid_picture ) )
1196
p_sys->vid_picture = vid_picture;
1200
/* Try to set the format to something easy to encode */
1201
vid_picture.palette = VIDEO_PALETTE_YUV420P;
1202
if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1204
p_sys->vid_picture = vid_picture;
1208
vid_picture.palette = VIDEO_PALETTE_YUV422P;
1209
if( ioctl( i_fd, VIDIOCSPICT, &vid_picture ) == 0 )
1211
p_sys->vid_picture = vid_picture;
1216
/* Find out final format */
1217
for( i = 0; v4lchroma_to_fourcc[i].i_v4l != 0; i++ )
1219
if( v4lchroma_to_fourcc[i].i_v4l == p_sys->vid_picture.palette)
1221
p_sys->i_fourcc = v4lchroma_to_fourcc[i].i_fourcc;
1228
msg_Err( p_demux, "ioctl VIDIOCGPICT failed" );
1233
if( p_sys->b_mjpeg )
1237
p_sys->mjpeg_buffers.count = 8;
1238
p_sys->mjpeg_buffers.size = MJPEG_BUFFER_SIZE;
1240
if( ioctl( i_fd, MJPIOC_REQBUFS, &p_sys->mjpeg_buffers ) < 0 )
1242
msg_Err( p_demux, "mmap unsupported" );
1246
p_sys->p_video_mmap = mmap( 0,
1247
p_sys->mjpeg_buffers.size * p_sys->mjpeg_buffers.count,
1248
PROT_READ | PROT_WRITE, MAP_SHARED, i_fd, 0 );
1249
if( p_sys->p_video_mmap == MAP_FAILED )
1251
msg_Err( p_demux, "mmap failed" );
1255
p_sys->i_fourcc = VLC_FOURCC( 'm','j','p','g' );
1256
p_sys->i_frame_pos = -1;
1258
/* queue up all the frames */
1259
for( i = 0; i < (int)p_sys->mjpeg_buffers.count; i++ )
1261
if( ioctl( i_fd, MJPIOC_QBUF_CAPT, &i ) < 0 )
1263
msg_Err( p_demux, "unable to queue frame" );
1270
/* Fill in picture_t fields */
1271
vout_InitPicture( VLC_OBJECT(p_demux), &p_sys->pic, p_sys->i_fourcc,
1272
p_sys->i_width, p_sys->i_height, p_sys->i_width *
1273
VOUT_ASPECT_FACTOR / p_sys->i_height );
1274
if( !p_sys->pic.i_planes )
1276
msg_Err( p_demux, "unsupported chroma" );
1279
p_sys->i_video_frame_size = 0;
1280
for( i = 0; i < p_sys->pic.i_planes; i++ )
1282
p_sys->i_video_frame_size += p_sys->pic.p[i].i_visible_lines *
1283
p_sys->pic.p[i].i_visible_pitch;
1286
msg_Dbg( p_demux, "v4l device uses frame size: %i",
1287
p_sys->i_video_frame_size );
1288
msg_Dbg( p_demux, "v4l device uses chroma: %4.4s",
1289
(char*)&p_sys->i_fourcc );
1291
/* Allocate mmap buffer */
1292
if( ioctl( i_fd, VIDIOCGMBUF, &p_sys->vid_mbuf ) < 0 )
1294
msg_Err( p_demux, "mmap unsupported" );
1298
p_sys->p_video_mmap = mmap( 0, p_sys->vid_mbuf.size,
1299
PROT_READ|PROT_WRITE, MAP_SHARED,
1301
if( p_sys->p_video_mmap == MAP_FAILED )
1303
/* FIXME -> normal read */
1304
msg_Err( p_demux, "mmap failed" );
1309
p_sys->vid_mmap.frame = 0;
1310
p_sys->vid_mmap.width = p_sys->i_width;
1311
p_sys->vid_mmap.height = p_sys->i_height;
1312
p_sys->vid_mmap.format = p_sys->vid_picture.palette;
1313
if( ioctl( i_fd, VIDIOCMCAPTURE, &p_sys->vid_mmap ) < 0 )
1315
msg_Warn( p_demux, "%4.4s refused", (char*)&p_sys->i_fourcc );
1316
msg_Err( p_demux, "chroma selection failed" );
1324
if( i_fd >= 0 ) close( i_fd );
1328
/*****************************************************************************
1330
*****************************************************************************/
1331
static int OpenAudioDev( demux_t *p_demux, char *psz_device )
1333
demux_sys_t *p_sys = p_demux->p_sys;
1336
if( (i_fd = open( psz_device, O_RDONLY | O_NONBLOCK )) < 0 )
1338
msg_Err( p_demux, "cannot open audio device (%s)", strerror( errno ) );
1342
i_format = AFMT_S16_LE;
1343
if( ioctl( i_fd, SNDCTL_DSP_SETFMT, &i_format ) < 0
1344
|| i_format != AFMT_S16_LE )
1346
msg_Err( p_demux, "cannot set audio format (16b little endian) "
1347
"(%s)", strerror( errno ) );
1351
if( ioctl( i_fd, SNDCTL_DSP_STEREO,
1352
&p_sys->b_stereo ) < 0 )
1354
msg_Err( p_demux, "cannot set audio channels count (%s)",
1355
strerror( errno ) );
1359
if( ioctl( i_fd, SNDCTL_DSP_SPEED,
1360
&p_sys->i_sample_rate ) < 0 )
1362
msg_Err( p_demux, "cannot set audio sample rate (%s)",
1363
strerror( errno ) );
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();
added
removed
modules/access/v4l/v4l.c
