* v4l2.c : Video4Linux2 input module for vlc
*****************************************************************************
* Copyright (C) 2002-2004 the VideoLAN team
- * $Id: v4l.c 16084 2006-07-19 09:45:02Z zorglub $
+ * $Id: v4l2.c 16084 2006-07-19 09:45:02Z zorglub $
*
* Author: Benjamin Pracht <bigben at videolan dot org>
+ * Richard Hosking <richard at hovis dot net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+/*
+ * Sections based on the reference V4L2 capture example at
+ * http://v4l2spec.bytesex.org/spec/capture-example.html
+ */
+
+/*
+ * TODO: No mjpeg support yet.
+ * TODO: mmap untested.
+ * TODO: Tuner partial implementation.
+ * TODO: Alsa input support?
+ */
/*****************************************************************************
* Preamble
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
+#include <sys/mman.h>
#include <asm/types.h> /* for videodev2.h */
#include <linux/videodev2.h>
+#include <sys/soundcard.h>
+
/*****************************************************************************
* Module descriptior
- *****************************************************************************/
+ *****************************************************************************/
static int Open ( vlc_object_t * );
static void Close( vlc_object_t * );
#define DEV_LONGTEXT N_( \
"Name of the device to use. " \
"If you don't specify anything, /dev/video0 will be used.")
+#define ADEV_TEXT N_("Audio device name")
+#define ADEV_LONGTEXT N_( \
+ "Name of the audio device to use. " \
+ "If you don't specify anything, no audio device will be used.")
+#define STANDARD_TEXT N_( "Standard" )
+#define STANDARD_LONGTEXT N_( \
+ "Video standard (Default, SECAM, PAL, or NTSC)." )
+#define CHROMA_TEXT N_("Video input chroma format")
+#define CHROMA_LONGTEXT N_( \
+ "Force the Video4Linux2 video device to use a specific chroma format " \
+ "(eg. I420, RV24, etc.)")
#define INPUT_TEXT N_( "Input" )
#define INPUT_LONGTEXT N_( \
"Input of the card to use (Usually, 0 = tuner, " \
"1 = composite, 2 = svideo)." )
-
+#define IOMETHOD_TEXT N_( "IO Method" )
+#define IOMETHOD_LONGTEXT N_( \
+ "IO Method (READ, MMAP, USERPTR)." )
+#define FPS_TEXT N_( "Framerate" )
+#define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
+ "(-1 for autodetect)." )
+#define STEREO_TEXT N_( "Stereo" )
+#define STEREO_LONGTEXT N_( \
+ "Capture the audio stream in stereo." )
+#define SAMPLERATE_TEXT N_( "Samplerate" )
+#define SAMPLERATE_LONGTEXT N_( \
+ "Samplerate of the captured audio stream, in Hz (eg: 11025, 22050, 44100, 48000)" )
+#define CACHING_TEXT N_("Caching value in ms")
+#define CACHING_LONGTEXT N_( \
+ "Caching value for V4L2 captures. This " \
+ "value should be set in milliseconds." )
+
+typedef enum {
+ IO_METHOD_READ,
+ IO_METHOD_MMAP,
+ IO_METHOD_USERPTR,
+} io_method;
+
+static int i_standards_list[] =
+ { V4L2_STD_UNKNOWN, V4L2_STD_SECAM, V4L2_STD_PAL, V4L2_STD_NTSC };
+static const char *psz_standards_list_text[] =
+ { N_("Default"), N_("SECAM"), N_("PAL"), N_("NTSC") };
+
+static int i_iomethod_list[] =
+ { IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR };
+static const char *psz_iomethod_list_text[] =
+ { N_("READ"), N_("MMAP"), N_("USERPTR") };
vlc_module_begin();
set_shortname( _("Video4Linux2") );
add_string( "v4l2-dev", "/dev/video0", 0, DEV_TEXT, DEV_LONGTEXT,
VLC_FALSE );
+ add_string( "v4l2-adev", "/dev/dsp", 0, DEV_TEXT, DEV_LONGTEXT,
+ VLC_FALSE );
+ add_integer( "v4l2-standard", 0, NULL, STANDARD_TEXT, STANDARD_LONGTEXT,
+ VLC_FALSE );
+ change_integer_list( i_standards_list, psz_standards_list_text, 0 );
+ add_string( "v4l2-chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
+ VLC_TRUE );
add_integer( "v4l2-input", 0, NULL, INPUT_TEXT, INPUT_LONGTEXT,
VLC_TRUE );
+ add_integer( "v4l2-io", IO_METHOD_MMAP, NULL, IOMETHOD_TEXT, IOMETHOD_LONGTEXT,
+ VLC_FALSE );
+ change_integer_list( i_iomethod_list, psz_iomethod_list_text, 0 );
+ add_float( "v4l2-fps", 0, NULL, FPS_TEXT, FPS_LONGTEXT, VLC_TRUE );
+ add_bool( "v4l2-stereo", VLC_TRUE, NULL, STEREO_TEXT, STEREO_LONGTEXT,
+ VLC_TRUE );
+ add_integer( "v4l2-samplerate", 48000, NULL, SAMPLERATE_TEXT,
+ SAMPLERATE_LONGTEXT, VLC_TRUE );
+ add_integer( "v4l2-caching", DEFAULT_PTS_DELAY / 1000, NULL,
+ CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
add_shortcut( "v4l2" );
set_capability( "access_demux", 10 );
* Access: local prototypes
*****************************************************************************/
-static int DemuxMMAP( demux_t * );
+static void ParseMRL( demux_t * );
+
static int Control( demux_t *, int, va_list );
-static int ProbeDev( demux_t * );
-static int OpenVideoDev( demux_t * );
+static int Demux( demux_t * );
+static block_t* GrabVideo( demux_t *p_demux );
+static block_t* ProcessVideoFrame( demux_t *p_demux, uint8_t *p_frame );
+static block_t* GrabAudio( demux_t *p_demux );
-struct demux_sys_t
+vlc_bool_t IsChromaSupported( demux_t *p_demux, unsigned int i_v4l2 );
+unsigned int GetChromaFromFourcc( char *psz_fourcc );
+
+static int OpenVideoDev( demux_t *, char *psz_device );
+static int OpenAudioDev( demux_t *, char *psz_device );
+static vlc_bool_t ProbeVideoDev( demux_t *, char *psz_device );
+static vlc_bool_t ProbeAudioDev( demux_t *, char *psz_device );
+
+static struct
{
- char *psz_device;
+ unsigned int i_v4l2;
+ int i_fourcc;
+} v4l2chroma_to_fourcc[] =
+{
+ { V4L2_PIX_FMT_GREY, VLC_FOURCC( 'G', 'R', 'E', 'Y' ) },
+ { V4L2_PIX_FMT_HI240, VLC_FOURCC( 'I', '2', '4', '0' ) },
+ { V4L2_PIX_FMT_RGB565, VLC_FOURCC( 'R', 'V', '1', '6' ) },
+ { V4L2_PIX_FMT_RGB555, VLC_FOURCC( 'R', 'V', '1', '5' ) },
+ { V4L2_PIX_FMT_BGR24, VLC_FOURCC( 'R', 'V', '2', '4' ) },
+ { V4L2_PIX_FMT_BGR32, VLC_FOURCC( 'R', 'V', '3', '2' ) },
+ { V4L2_PIX_FMT_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', '2' ) },
+ { V4L2_PIX_FMT_YUYV, VLC_FOURCC( 'Y', 'U', 'Y', 'V' ) },
+ { V4L2_PIX_FMT_UYVY, VLC_FOURCC( 'U', 'Y', 'V', 'Y' ) },
+ { V4L2_PIX_FMT_Y41P, VLC_FOURCC( 'I', '4', '1', 'N' ) },
+ { V4L2_PIX_FMT_YUV422P, VLC_FOURCC( 'I', '4', '2', '2' ) },
+ { V4L2_PIX_FMT_YVU420, VLC_FOURCC( 'I', '4', '2', '0' ) },
+ { V4L2_PIX_FMT_YUV411P, VLC_FOURCC( 'I', '4', '1', '1' ) },
+ { V4L2_PIX_FMT_YUV410, VLC_FOURCC( 'I', '4', '1', '0' ) },
+ { 0, 0 }
+};
- int i_fd_video;
+struct buffer_t
+{
+ void * start;
+ size_t length;
+};
+
+struct demux_sys_t
+{
+ char *psz_device; /* Main device from MRL, can be video or audio */
+
+ char *psz_vdev;
+ int i_fd_video;
+
+ char *psz_adev;
+ int i_fd_audio;
+
+ /* Video */
+ io_method io;
+
+ int i_pts;
struct v4l2_capability dev_cap;
int i_input;
struct v4l2_input *p_inputs;
int i_selected_input;
+
+ int i_standard;
+ struct v4l2_standard *p_standards;
+ v4l2_std_id i_selected_standard_id;
int i_audio;
/* V4L2 devices cannot have more than 32 audio inputs */
int i_codec;
struct v4l2_fmtdesc *p_codecs;
+
+ struct buffer_t *p_buffers;
+ unsigned int i_nbuffers;
+
+ int i_width;
+ int i_height;
+ float f_fps; /* <= 0.0 mean to grab at full rate */
+ mtime_t i_video_pts; /* only used when f_fps > 0 */
+ int i_fourcc;
+
+ picture_t pic;
+ int i_video_frame_size;
+
+ es_out_id_t *p_es_video;
+
+ /* Audio */
+ int i_sample_rate;
+ vlc_bool_t b_stereo;
+ int i_audio_max_frame_size;
+ block_t *p_block_audio;
+ es_out_id_t *p_es_audio;
};
/*****************************************************************************
- * Open: opens v4l device
+ * Open: opens v4l2 device
*****************************************************************************
*
* url: <video device>::::
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys;
-
+ vlc_value_t val;
+ char *psz;
+
/* Only when selected */
- if( *p_demux->psz_access == '\0' )
- return VLC_EGENERIC;
+ if( *p_demux->psz_access == '\0' ) return VLC_EGENERIC;
/* Set up p_demux */
p_demux->pf_control = Control;
+ p_demux->pf_demux = Demux;
p_demux->info.i_update = 0;
p_demux->info.i_title = 0;
p_demux->info.i_seekpoint = 0;
p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
if( p_sys == NULL ) return VLC_ENOMEM;
memset( p_sys, 0, sizeof( demux_sys_t ) );
+
+ p_sys->i_video_pts = -1;
+
+ var_Create( p_demux, "v4l2-standard", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
+ var_Get( p_demux, "v4l2-standard", &val );
+ p_sys->i_selected_standard_id = i_standards_list[val.i_int];
+
+ p_sys->i_selected_input = var_CreateGetInteger( p_demux, "v4l2-input" );
+
+ p_sys->io = var_CreateGetInteger( p_demux, "v4l2-io" );
+
+ var_Create( p_demux, "v4l2-fps", VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
+ var_Get( p_demux, "v4l2-fps", &val );
+ p_sys->f_fps = val.f_float;
+
+ var_Create( p_demux, "v4l2-samplerate", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
+ var_Get( p_demux, "v4l2-samplerate", &val );
+ p_sys->i_sample_rate = val.i_int;
+
+ psz = var_CreateGetString( p_demux, "v4l2-chroma" );
+ p_sys->i_fourcc = GetChromaFromFourcc( psz );
+ free( psz );
+
+ var_Create( p_demux, "v4l2-stereo", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
+ var_Get( p_demux, "v4l2-stereo", &val );
+ p_sys->b_stereo = val.b_bool;
+
+ p_sys->i_pts = var_CreateGetInteger( p_demux, "v4l2-caching" );
+
+ p_sys->psz_device = p_sys->psz_vdev = p_sys->psz_adev = NULL;
+ p_sys->i_fd_video = -1;
+ p_sys->i_fd_audio = -1;
+
+ p_sys->p_es_video = p_sys->p_es_audio = 0;
+ p_sys->p_block_audio = 0;
+
+ ParseMRL( p_demux );
+
+ /* Find main device (video or audio) */
+ if( p_sys->psz_device && *p_sys->psz_device )
+ {
+ msg_Dbg( p_demux, "main device='%s'", p_sys->psz_device );
- p_sys->psz_device = var_CreateGetString( p_demux, "v4l2-dev" );
+ /* Try to open as video device */
+ msg_Dbg( p_demux, "trying device '%s' as video", p_sys->psz_device );
+ if( ProbeVideoDev( p_demux, p_sys->psz_device ) )
+ {
+ msg_Dbg( p_demux, "'%s' is a video device", p_sys->psz_device );
+ /* Device was a video device */
+ if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
+ p_sys->psz_vdev = p_sys->psz_device;
+ p_sys->psz_device = NULL;
+ p_sys->i_fd_video = OpenVideoDev( p_demux, p_sys->psz_vdev );
+ if( p_sys->i_fd_video < 0 )
+ {
+ Close( p_this );
+ return VLC_EGENERIC;
+ }
+ }
+ else
+ {
+ /* Try to open as audio device */
+ msg_Dbg( p_demux, "trying device '%s' as audio", p_sys->psz_device );
+ if( ProbeAudioDev( p_demux, p_sys->psz_device ) )
+ {
+ msg_Dbg( p_demux, "'%s' is an audio device", p_sys->psz_device );
+ /* Device was an audio device */
+ if( p_sys->psz_adev ) free( p_sys->psz_adev );
+ p_sys->psz_adev = p_sys->psz_device;
+ p_sys->psz_device = NULL;
+ p_sys->i_fd_audio = OpenAudioDev( p_demux, p_sys->psz_adev );
+ if( p_sys->i_fd_audio < 0 )
+ {
+ Close( p_this );
+ return VLC_EGENERIC;
+ }
+ }
+ }
+ }
- if( ProbeDev( p_demux ) < 0 ) return VLC_EGENERIC;
+ /* If no device opened, only continue if the access was forced */
+ if( p_sys->i_fd_video < 0 && p_sys->i_fd_audio < 0 )
+ {
+ if( strcmp( p_demux->psz_access, "v4l2" ) )
+ {
+ Close( p_this );
+ return VLC_EGENERIC;
+ }
+ }
- if( OpenVideoDev( p_demux ) < 0 ) return VLC_EGENERIC;
+ /* Find video device */
+ if( p_sys->i_fd_video < 0 )
+ {
+ if( !p_sys->psz_vdev || !*p_sys->psz_vdev )
+ {
+ if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
+ p_sys->psz_vdev = var_CreateGetString( p_demux, "v4l2-dev" );;
+ }
+
+ if( p_sys->psz_vdev && *p_sys->psz_vdev && ProbeVideoDev( p_demux, p_sys->psz_vdev ) )
+ {
+ p_sys->i_fd_video = OpenVideoDev( p_demux, p_sys->psz_vdev );
+ }
+ }
+
+ /* Find audio device */
+ if( p_sys->i_fd_audio < 0 )
+ {
+ if( !p_sys->psz_adev || !*p_sys->psz_adev )
+ {
+ if( p_sys->psz_adev ) free( p_sys->psz_adev );
+ p_sys->psz_adev = var_CreateGetString( p_demux, "v4l2-adev" );;
+ }
+
+ if( p_sys->psz_adev && *p_sys->psz_adev && ProbeAudioDev( p_demux, p_sys->psz_adev ) )
+ {
+ p_sys->i_fd_audio = OpenAudioDev( p_demux, p_sys->psz_adev );
+ }
+ }
+
+ if( p_sys->i_fd_video < 0 && p_sys->i_fd_audio < 0 )
+ {
+ Close( p_this );
+ return VLC_EGENERIC;
+ }
return VLC_SUCCESS;
}
+/*****************************************************************************
+ * ParseMRL: parse the options contained in the MRL
+ *****************************************************************************/
+static void ParseMRL( demux_t *p_demux )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ char *psz_dup = strdup( p_demux->psz_path );
+ char *psz_parser = psz_dup;
+
+ while( *psz_parser && *psz_parser != ':' )
+ {
+ psz_parser++;
+ }
+
+ if( *psz_parser == ':' )
+ {
+ /* read options */
+ for( ;; )
+ {
+ *psz_parser++ = '\0';
+
+ if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) ) )
+ {
+ int i_len;
+
+ psz_parser += strlen( "adev=" );
+ if( strchr( psz_parser, ':' ) )
+ {
+ i_len = strchr( psz_parser, ':' ) - psz_parser;
+ }
+ else
+ {
+ i_len = strlen( psz_parser );
+ }
+
+ p_sys->psz_adev = strndup( psz_parser, i_len );
+
+ psz_parser += i_len;
+ }
+ else if( !strncmp( psz_parser, "standard=", strlen( "standard=" ) ) )
+ {
+ psz_parser += strlen( "standard=" );
+ if( !strncmp( psz_parser, "pal", strlen( "pal" ) ) )
+ {
+ p_sys->i_selected_standard_id = V4L2_STD_PAL;
+ psz_parser += strlen( "pal" );
+ }
+ else if( !strncmp( psz_parser, "ntsc", strlen( "ntsc" ) ) )
+ {
+ p_sys->i_selected_standard_id = V4L2_STD_NTSC;
+ psz_parser += strlen( "ntsc" );
+ }
+ else if( !strncmp( psz_parser, "secam", strlen( "secam" ) ) )
+ {
+ p_sys->i_selected_standard_id = V4L2_STD_SECAM;
+ psz_parser += strlen( "secam" );
+ }
+ else if( !strncmp( psz_parser, "default", strlen( "default" ) ) )
+ {
+ p_sys->i_selected_standard_id = V4L2_STD_UNKNOWN;
+ psz_parser += strlen( "default" );
+ }
+ else
+ {
+ p_sys->i_selected_standard_id = i_standards_list[strtol( psz_parser, &psz_parser, 0 )];
+ }
+ }
+ else if( !strncmp( psz_parser, "chroma=", strlen( "chroma=" ) ) )
+ {
+ int i_len;
+
+ psz_parser += strlen( "chroma=" );
+ if( strchr( psz_parser, ':' ) )
+ {
+ i_len = strchr( psz_parser, ':' ) - psz_parser;
+ }
+ else
+ {
+ i_len = strlen( psz_parser );
+ }
+
+ char* chroma = strndup( psz_parser, i_len );
+ p_sys->i_fourcc = GetChromaFromFourcc( chroma );
+ free( chroma );
+
+ psz_parser += i_len;
+ }
+ else if( !strncmp( psz_parser, "input=", strlen( "input=" ) ) )
+ {
+ p_sys->i_selected_input = strtol( psz_parser + strlen( "input=" ),
+ &psz_parser, 0 );
+ }
+ else if( !strncmp( psz_parser, "fps=", strlen( "fps=" ) ) )
+ {
+ p_sys->f_fps = strtof( psz_parser + strlen( "fps=" ),
+ &psz_parser );
+ }
+ else if( !strncmp( psz_parser, "io=", strlen( "io=" ) ) )
+ {
+ psz_parser += strlen( "io=" );
+ if( !strncmp( psz_parser, "read", strlen( "read" ) ) )
+ {
+ p_sys->io = IO_METHOD_READ;
+ psz_parser += strlen( "read" );
+ }
+ else if( !strncmp( psz_parser, "mmap", strlen( "mmap" ) ) )
+ {
+ p_sys->io = IO_METHOD_MMAP;
+ psz_parser += strlen( "mmap" );
+ }
+ else if( !strncmp( psz_parser, "userptr", strlen( "userptr" ) ) )
+ {
+ p_sys->io = IO_METHOD_USERPTR;
+ psz_parser += strlen( "userptr" );
+ }
+ else
+ {
+ p_sys->io = strtol( psz_parser, &psz_parser, 0 );
+ }
+ }
+ else if( !strncmp( psz_parser, "samplerate=",
+ strlen( "samplerate=" ) ) )
+ {
+ p_sys->i_sample_rate =
+ strtol( psz_parser + strlen( "samplerate=" ),
+ &psz_parser, 0 );
+ }
+ else if( !strncmp( psz_parser, "stereo", strlen( "stereo" ) ) )
+ {
+ psz_parser += strlen( "stereo" );
+ p_sys->b_stereo = VLC_TRUE;
+ }
+ else if( !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
+ {
+ psz_parser += strlen( "mono" );
+ p_sys->b_stereo = VLC_FALSE;
+ }
+ else if( !strncmp( psz_parser, "caching=", strlen( "caching=" ) ) )
+ {
+ p_sys->i_pts = strtol( psz_parser + strlen( "caching=" ),
+ &psz_parser, DEFAULT_PTS_DELAY / 1000 );
+ }
+ else
+ {
+ msg_Warn( p_demux, "unknown option" );
+ }
+
+ while( *psz_parser && *psz_parser != ':' )
+ {
+ psz_parser++;
+ }
+
+ if( *psz_parser == '\0' )
+ {
+ break;
+ }
+ }
+ }
+
+ /* Main device */
+ if( *psz_dup )
+ {
+ p_sys->psz_device = strdup( psz_dup );
+ }
+ if( psz_dup ) free( psz_dup );
+}
+
/*****************************************************************************
* Close: close device, free resources
*****************************************************************************/
static void Close( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t *)p_this;
- demux_sys_t *p_sys = p_demux->p_sys;
+ demux_sys_t *p_sys = p_demux->p_sys;
+ struct v4l2_buffer buf;
+ enum v4l2_buf_type buf_type;
+ unsigned int i;
+
+ /* Stop video capture */
+ if( p_sys->i_fd_video >= 0 )
+ {
+ switch( p_sys->io )
+ {
+ case IO_METHOD_READ:
+ /* Nothing to do */
+ break;
+
+ case IO_METHOD_MMAP:
+ case IO_METHOD_USERPTR:
+ /* Some drivers 'hang' internally if this is not done before streamoff */
+ for( unsigned int i = 0; i < p_sys->i_nbuffers; i++ )
+ {
+ memset( &buf, 0, sizeof(buf) );
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_USERPTR;
+ ioctl( p_sys->i_fd_video, VIDIOC_DQBUF, &buf ); /* ignore result */
+ }
+
+ buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ if( ioctl( p_sys->i_fd_video, VIDIOC_STREAMOFF, &buf_type ) < 0 ) {
+ msg_Err( p_demux, "VIDIOC_STREAMOFF failed" );
+ }
+
+ break;
+ }
+ }
+ /* Close */
if( p_sys->i_fd_video >= 0 ) close( p_sys->i_fd_video );
+ if( p_sys->i_fd_audio >= 0 ) close( p_sys->i_fd_audio );
+
+ /* Free Video Buffers */
+ if( p_sys->p_buffers ) {
+ switch( p_sys->io )
+ {
+ case IO_METHOD_READ:
+ free( p_sys->p_buffers[0].start );
+ break;
+
+ case IO_METHOD_MMAP:
+ for( i = 0; i < p_sys->i_nbuffers; ++i )
+ {
+ if( munmap( p_sys->p_buffers[i].start, p_sys->p_buffers[i].length ) )
+ {
+ msg_Err( p_demux, "munmap failed" );
+ }
+ }
+ break;
+
+ case IO_METHOD_USERPTR:
+ for( i = 0; i < p_sys->i_nbuffers; ++i )
+ {
+ free( p_sys->p_buffers[i].start );
+ }
+ break;
+ }
+ free( p_sys->p_buffers );
+ }
+ if( p_sys->p_block_audio ) block_Release( p_sys->p_block_audio );
if( p_sys->psz_device ) free( p_sys->psz_device );
+ if( p_sys->psz_vdev ) free( p_sys->psz_vdev );
+ if( p_sys->psz_adev ) free( p_sys->psz_adev );
+ if( p_sys->p_standards ) free( p_sys->p_standards );
if( p_sys->p_inputs ) free( p_sys->p_inputs );
if( p_sys->p_tuners ) free( p_sys->p_tuners );
if( p_sys->p_codecs ) free( p_sys->p_codecs );
*****************************************************************************/
static int Control( demux_t *p_demux, int i_query, va_list args )
{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ vlc_bool_t *pb;
+ int64_t *pi64;
+
+ switch( i_query )
+ {
+ /* Special for access_demux */
+ case DEMUX_CAN_PAUSE:
+ case DEMUX_SET_PAUSE_STATE:
+ case DEMUX_CAN_CONTROL_PACE:
+ pb = (vlc_bool_t*)va_arg( args, vlc_bool_t * );
+ *pb = VLC_FALSE;
+ return VLC_SUCCESS;
+
+ case DEMUX_GET_PTS_DELAY:
+ pi64 = (int64_t*)va_arg( args, int64_t * );
+ *pi64 = (int64_t)p_sys->i_pts * 1000;
+ return VLC_SUCCESS;
+
+ case DEMUX_GET_TIME:
+ pi64 = (int64_t*)va_arg( args, int64_t * );
+ *pi64 = mdate();
+ return VLC_SUCCESS;
+
+ /* TODO implement others */
+ default:
+ return VLC_EGENERIC;
+ }
+
return VLC_EGENERIC;
}
/*****************************************************************************
- * Demux:
+ * Demux: Processes the audio or video frame
*****************************************************************************/
-static int DemuxMMAP( demux_t *p_demux )
+static int Demux( demux_t *p_demux )
{
- msleep( 40000 );
+ demux_sys_t *p_sys = p_demux->p_sys;
+ es_out_id_t *p_es = p_sys->p_es_audio;
+ block_t *p_block = NULL;
+
+ /* Try grabbing audio frames first */
+ if( p_sys->i_fd_audio < 0 || !( p_block = GrabAudio( p_demux ) ) )
+ {
+ /* Try grabbing video frame */
+ p_es = p_sys->p_es_video;
+ if( p_sys->i_fd_video > 0 ) p_block = GrabVideo( p_demux );
+ }
+
+ if( !p_block )
+ {
+ /* Sleep so we do not consume all the cpu, 10ms seems
+ * like a good value (100fps) */
+ msleep( 10 );
+ return 1;
+ }
+
+ es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
+ es_out_Send( p_demux->out, p_es, p_block );
+
return 1;
}
+/*****************************************************************************
+ * GrabVideo: Grab a video frame
+ *****************************************************************************/
+static block_t* GrabVideo( demux_t *p_demux )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ block_t *p_block = NULL;
+ struct v4l2_buffer buf;
+
+ if( p_sys->f_fps >= 0.1 && p_sys->i_video_pts > 0 )
+ {
+ mtime_t i_dur = (mtime_t)((double)1000000 / (double)p_sys->f_fps);
+
+ /* Did we wait long enough ? (frame rate reduction) */
+ if( p_sys->i_video_pts + i_dur > mdate() ) return 0;
+ }
+
+ /* Grab Video Frame */
+ switch( p_sys->io )
+ {
+ case IO_METHOD_READ:
+ if( read( p_sys->i_fd_video, p_sys->p_buffers[0].start, p_sys->p_buffers[0].length ) )
+ {
+ switch( errno )
+ {
+ case EAGAIN:
+ return 0;
+ case EIO:
+ /* Could ignore EIO, see spec. */
+ /* fall through */
+ default:
+ msg_Err( p_demux, "Failed to read frame" );
+ return 0;
+ }
+ }
+
+ p_block = ProcessVideoFrame( p_demux, (uint8_t*)p_sys->p_buffers[0].start );
+ if( !p_block ) return 0;
+
+ break;
+
+ case IO_METHOD_MMAP:
+ memset( &buf, 0, sizeof(buf) );
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+
+ /* Wait for next frame */
+ if (ioctl( p_sys->i_fd_video, VIDIOC_DQBUF, &buf ) < 0 )
+ {
+ switch( errno )
+ {
+ case EAGAIN:
+ return 0;
+ case EIO:
+ /* Could ignore EIO, see spec. */
+ /* fall through */
+ default:
+ msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
+ return 0;
+ }
+ }
+
+ if( buf.index >= p_sys->i_nbuffers ) {
+ msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
+ return 0;
+ }
+
+ p_block = ProcessVideoFrame( p_demux, p_sys->p_buffers[buf.index].start );
+ if( !p_block ) return 0;
+
+ /* Unlock */
+ if( ioctl( p_sys->i_fd_video, VIDIOC_QBUF, &buf ) < 0 )
+ {
+ msg_Err (p_demux, "Failed to unlock (VIDIOC_QBUF)");
+ return 0;
+ }
+
+ break;
+
+ case IO_METHOD_USERPTR:
+ memset( &buf, 0, sizeof(buf) );
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_USERPTR;
+
+ /* Wait for next frame */
+ if (ioctl( p_sys->i_fd_video, VIDIOC_DQBUF, &buf ) < 0 )
+ {
+ switch( errno )
+ {
+ case EAGAIN:
+ return 0;
+ case EIO:
+ /* Could ignore EIO, see spec. */
+ /* fall through */
+ default:
+ msg_Err( p_demux, "Failed to wait (VIDIOC_DQBUF)" );
+ return 0;
+ }
+ }
+
+ /* Find frame? */
+ unsigned int i;
+ for( i = 0; i < p_sys->i_nbuffers; i++ )
+ {
+ if( buf.m.userptr == (unsigned long)p_sys->p_buffers[i].start &&
+ buf.length == p_sys->p_buffers[i].length ) break;
+ }
+
+ if( i >= p_sys->i_nbuffers ) {
+ msg_Err( p_demux, "Failed capturing new frame as i>=nbuffers" );
+ return 0;
+ }
+
+ p_block = ProcessVideoFrame( p_demux, (uint8_t*)buf.m.userptr );
+ if( !p_block ) return 0;
+
+ /* Unlock */
+ if( ioctl( p_sys->i_fd_video, VIDIOC_QBUF, &buf ) < 0 )
+ {
+ msg_Err (p_demux, "Failed to unlock (VIDIOC_QBUF)");
+ return 0;
+ }
+
+ break;
+
+ }
+
+ /* Timestamp */
+ p_sys->i_video_pts = p_block->i_pts = p_block->i_dts = mdate();
+
+ return p_block;
+}
+
+/*****************************************************************************
+ * ProcessVideoFrame: Helper function to take a buffer and copy it into
+ * a new block
+ *****************************************************************************/
+static block_t* ProcessVideoFrame( demux_t *p_demux, uint8_t *p_frame )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ block_t *p_block;
+
+ if( !p_frame ) return 0;
+
+ /* New block */
+ if( !( p_block = block_New( p_demux, p_sys->i_video_frame_size ) ) )
+ {
+ msg_Warn( p_demux, "Cannot get new block" );
+ return 0;
+ }
+
+ /* Copy frame */
+ memcpy( p_block->p_buffer, p_frame, p_sys->i_video_frame_size );
+
+ return p_block;
+}
+
+/*****************************************************************************
+ * GrabAudio: Grab an audio frame
+ *****************************************************************************/
+static block_t* GrabAudio( demux_t *p_demux )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ struct audio_buf_info buf_info;
+ int i_read, i_correct;
+ block_t *p_block;
+
+ /* Copied from v4l.c */
+
+ if( p_sys->p_block_audio ) p_block = p_sys->p_block_audio;
+ else p_block = block_New( p_demux, p_sys->i_audio_max_frame_size );
+
+ if( !p_block )
+ {
+ msg_Warn( p_demux, "cannot get block" );
+ return 0;
+ }
+
+ p_sys->p_block_audio = p_block;
+
+ i_read = read( p_sys->i_fd_audio, p_block->p_buffer,
+ p_sys->i_audio_max_frame_size );
+
+ if( i_read <= 0 ) return 0;
+
+ p_block->i_buffer = i_read;
+ p_sys->p_block_audio = 0;
+
+ /* Correct the date because of kernel buffering */
+ i_correct = i_read;
+ if( ioctl( p_sys->i_fd_audio, SNDCTL_DSP_GETISPACE, &buf_info ) == 0 )
+ {
+ i_correct += buf_info.bytes;
+ }
+
+ /* Timestamp */
+ p_block->i_pts = p_block->i_dts =
+ mdate() - I64C(1000000) * (mtime_t)i_correct /
+ 2 / ( p_sys->b_stereo ? 2 : 1) / p_sys->i_sample_rate;
+
+ return p_block;
+}
+
+/*****************************************************************************
+ * Helper function to initalise video IO using the Read method
+ *****************************************************************************/
+static int InitRead( demux_t *p_demux, int i_fd, unsigned int i_buffer_size )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ p_sys->p_buffers = calloc( 1, sizeof( *p_sys->p_buffers ) );
+ if( !p_sys->p_buffers )
+ {
+ msg_Err( p_demux, "Out of memory" );
+ goto open_failed;
+ }
+
+ p_sys->p_buffers[0].length = i_buffer_size;
+ p_sys->p_buffers[0].start = malloc( i_buffer_size );
+ if( !p_sys->p_buffers[0].start )
+ {
+ msg_Err( p_demux, "Out of memory" );
+ goto open_failed;
+ }
+
+ return VLC_SUCCESS;
+
+open_failed:
+ return VLC_EGENERIC;
+
+}
+
+/*****************************************************************************
+ * Helper function to initalise video IO using the mmap method
+ *****************************************************************************/
+static int InitMmap( demux_t *p_demux, int i_fd )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ struct v4l2_requestbuffers req;
+
+ memset( &req, 0, sizeof(req) );
+ req.count = 4;
+ req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ req.memory = V4L2_MEMORY_MMAP;
+
+ if( ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
+ {
+ msg_Err( p_demux, "device does not support mmap i/o" );
+ goto open_failed;
+ }
+
+ if( req.count < 2 )
+ {
+ msg_Err( p_demux, "Insufficient buffer memory" );
+ goto open_failed;
+ }
+
+ p_sys->p_buffers = calloc( req.count, sizeof( *p_sys->p_buffers ) );
+ if( !p_sys->p_buffers )
+ {
+ msg_Err( p_demux, "Out of memory" );
+ goto open_failed;
+ }
+
+ for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < req.count; ++p_sys->i_nbuffers )
+ {
+ struct v4l2_buffer buf;
+
+ memset( &buf, 0, sizeof(buf) );
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+ buf.index = p_sys->i_nbuffers;
+
+ if( ioctl( i_fd, VIDIOC_QUERYBUF, &buf ) < 0 )
+ {
+ msg_Err( p_demux, "VIDIOC_QUERYBUF" );
+ goto open_failed;
+ }
+
+ p_sys->p_buffers[p_sys->i_nbuffers].length = buf.length;
+ p_sys->p_buffers[p_sys->i_nbuffers].start =
+ mmap( NULL, buf.length, PROT_READ | PROT_WRITE, MAP_SHARED, p_sys->i_fd_video, buf.m.offset );
+
+ if( p_sys->p_buffers[p_sys->i_nbuffers].start == MAP_FAILED )
+ {
+ msg_Err( p_demux, "mmap failed" );
+ goto open_failed;
+ }
+ }
+
+ return VLC_SUCCESS;
+
+open_failed:
+ return VLC_EGENERIC;
+
+}
+
+/*****************************************************************************
+ * Helper function to initalise video IO using the userbuf method
+ *****************************************************************************/
+static int InitUserP( demux_t *p_demux, int i_fd, unsigned int i_buffer_size )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ struct v4l2_requestbuffers req;
+
+ memset( &req, 0, sizeof(req) );
+ req.count = 4;
+ req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ req.memory = V4L2_MEMORY_USERPTR;
+
+ if( ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
+ {
+ msg_Err( p_demux, "device does not support user pointer i/o" );
+ goto open_failed;
+ }
+
+ p_sys->p_buffers = calloc( 4, sizeof( *p_sys->p_buffers ) );
+ if( !p_sys->p_buffers )
+ {
+ msg_Err( p_demux, "Out of memory" );
+ goto open_failed;
+ }
+
+ for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < 4; ++p_sys->i_nbuffers )
+ {
+ p_sys->p_buffers[p_sys->i_nbuffers].length = i_buffer_size;
+ p_sys->p_buffers[p_sys->i_nbuffers].start = malloc( i_buffer_size );
+
+ if( !p_sys->p_buffers[p_sys->i_nbuffers].start )
+ {
+ msg_Err( p_demux, "out of memory" );
+ goto open_failed;
+ }
+ }
+
+ return VLC_SUCCESS;
+
+open_failed:
+ return VLC_EGENERIC;
+
+}
+
+/*****************************************************************************
+ * GetChromaFromFourcc: Returns the fourcc code from the given string
+ *****************************************************************************/
+unsigned int GetChromaFromFourcc( char *psz_fourcc )
+{
+ if( strlen( psz_fourcc ) >= 4 )
+ {
+ int i_chroma = VLC_FOURCC( psz_fourcc[0], psz_fourcc[1], psz_fourcc[2], psz_fourcc[3] );
+
+ /* Find out v4l2 chroma code */
+ for( int i = 0; v4l2chroma_to_fourcc[i].i_fourcc != 0; i++ )
+ {
+ if( v4l2chroma_to_fourcc[i].i_fourcc == i_chroma )
+ {
+ return v4l2chroma_to_fourcc[i].i_fourcc;
+ }
+ }
+ }
+
+ return 0;
+}
+
+/*****************************************************************************
+ * IsChromaSupported: returns true if the specified V4L2 chroma constant is
+ * in the array of supported chromas returned by the driver
+ *****************************************************************************/
+vlc_bool_t IsChromaSupported( demux_t *p_demux, unsigned int i_chroma )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ for( int i_index = 0; i_index < p_sys->i_codec; i_index++ )
+ {
+ if( p_sys->p_codecs[i_index].pixelformat == i_chroma ) return VLC_TRUE;
+ }
+
+ return VLC_FALSE;
+}
/*****************************************************************************
* OpenVideoDev: open and set up the video device and probe for capabilities
*****************************************************************************/
-int OpenVideoDev( demux_t *p_demux )
+int OpenVideoDev( demux_t *p_demux, char *psz_device )
{
int i_fd;
demux_sys_t *p_sys = p_demux->p_sys;
-
- if( ( i_fd = open( p_sys->psz_device, O_RDWR ) ) < 0 )
+ struct v4l2_cropcap cropcap;
+ struct v4l2_crop crop;
+ struct v4l2_format fmt;
+ unsigned int i_min;
+ enum v4l2_buf_type buf_type;
+
+ if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
{
msg_Err( p_demux, "cannot open device (%m)" );
goto open_failed;
}
- p_sys->i_fd_video = i_fd;
- p_sys->i_selected_input = var_CreateGetInteger( p_demux, "v4l2-input" );
+ /* Select standard */
+
+ if( p_sys->i_selected_standard_id != V4L2_STD_UNKNOWN )
+ {
+ if( ioctl( i_fd, VIDIOC_S_STD, &p_sys->i_selected_standard_id ) < 0 )
+ {
+ msg_Err( p_demux, "cannot set input (%m)" );
+ goto open_failed;
+ }
+ msg_Dbg( p_demux, "Set standard" );
+ }
+ /* Select input */
+
if( p_sys->i_selected_input > p_sys->i_input )
{
msg_Warn( p_demux, "invalid input. Using the default one" );
goto open_failed;
}
- if( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING )
+ /* Verify device support for the various IO methods */
+ switch( p_sys->io )
{
- struct v4l2_requestbuffers reqbuf;
-
- reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- reqbuf.memory = V4L2_MEMORY_MMAP;
- reqbuf.count = 0;
-
- if( ioctl( i_fd, VIDIOC_REQBUFS, &reqbuf ) < 0 )
+ case IO_METHOD_READ:
+ if( !(p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE) )
{
- msg_Err( p_demux, "cannot initiate I/O operation (%m). "
- "Only MMAP is supported at the moment" );
+ msg_Err( p_demux, "device does not support read i/o" );
+ goto open_failed;
+ }
+ break;
+
+ case IO_METHOD_MMAP:
+ case IO_METHOD_USERPTR:
+ if( !(p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING) )
+ {
+ msg_Err( p_demux, "device does not support streaming i/o" );
+ goto open_failed;
+ }
+ break;
+
+ default:
+ msg_Err( p_demux, "io method not supported" );
+ goto open_failed;
+ }
+
+ /* Reset Cropping */
+ memset( &cropcap, 0, sizeof(cropcap) );
+ cropcap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ if( ioctl( i_fd, VIDIOC_CROPCAP, &cropcap ) >= 0 )
+ {
+ crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ crop.c = cropcap.defrect; /* reset to default */
+ if( ioctl( i_fd, VIDIOC_S_CROP, &crop ) < 0 )
+ {
+ switch( errno )
+ {
+ case EINVAL:
+ /* Cropping not supported. */
+ break;
+ default:
+ /* Errors ignored. */
+ break;
+ }
+ }
+ }
+
+ /* Try and find default resolution if not specified */
+ if( !p_sys->i_width && !p_sys->i_height ) {
+ memset( &fmt, 0, sizeof(fmt) );
+ fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ if ( ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 )
+ {
+ msg_Err( p_demux, "Cannot get default width and height." );
goto open_failed;
+ }
+
+ p_sys->i_width = fmt.fmt.pix.width;
+ p_sys->i_height = fmt.fmt.pix.height;
+
+ if( fmt.fmt.pix.field == V4L2_FIELD_ALTERNATE )
+ {
+ p_sys->i_height = p_sys->i_height * 2;
+ }
+ }
+
+ fmt.fmt.pix.width = p_sys->i_width;
+ fmt.fmt.pix.height = p_sys->i_height;
+ fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
+
+ /* Test and set Chroma */
+ fmt.fmt.pix.pixelformat = 0;
+ if( p_sys->i_fourcc )
+ {
+ /* User specified chroma */
+ for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
+ {
+ if( v4l2chroma_to_fourcc[i].i_fourcc == p_sys->i_fourcc )
+ {
+ fmt.fmt.pix.pixelformat = v4l2chroma_to_fourcc[i].i_v4l2;
+ break;
+ }
+ }
+ /* Try and set user chroma */
+ if( !IsChromaSupported( p_demux, fmt.fmt.pix.pixelformat ) || ( fmt.fmt.pix.pixelformat && ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 ) )
+ {
+ msg_Warn( p_demux, "Driver is unable to use specified chroma. Using defaults." );
+ fmt.fmt.pix.pixelformat = 0;
}
- p_demux->pf_demux = DemuxMMAP;
}
- else
+
+ /* If no user specified chroma, find best */
+ if( !fmt.fmt.pix.pixelformat )
{
- msg_Warn( p_demux, "I/O method not supported at the moment" );
+ fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YVU420;
+ if( !IsChromaSupported( p_demux, fmt.fmt.pix.pixelformat ) || ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
+ {
+ fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
+ if( !IsChromaSupported( p_demux, fmt.fmt.pix.pixelformat ) || ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
+ {
+ fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
+ if( !IsChromaSupported( p_demux, fmt.fmt.pix.pixelformat ) || ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
+ {
+ msg_Err( p_demux, "Could not select any of the default chromas!" );
+ goto open_failed;
+ }
+ }
+ }
+ }
+
+ /* Reassign width, height and chroma incase driver override */
+ p_sys->i_width = fmt.fmt.pix.width;
+ p_sys->i_height = fmt.fmt.pix.height;
+
+ /* Look up final fourcc */
+ p_sys->i_fourcc = 0;
+ for( int i = 0; v4l2chroma_to_fourcc[i].i_fourcc != 0; i++ )
+ {
+ if( v4l2chroma_to_fourcc[i].i_v4l2 == fmt.fmt.pix.pixelformat )
+ {
+ p_sys->i_fourcc = v4l2chroma_to_fourcc[i].i_fourcc;
+ break;
+ }
+ }
+
+ /* Buggy driver paranoia */
+ i_min = fmt.fmt.pix.width * 2;
+ if( fmt.fmt.pix.bytesperline < i_min )
+ fmt.fmt.pix.bytesperline = i_min;
+ i_min = fmt.fmt.pix.bytesperline * fmt.fmt.pix.height;
+ if( fmt.fmt.pix.sizeimage < i_min )
+ fmt.fmt.pix.sizeimage = i_min;
+
+ /* Init vout Picture */
+ vout_InitPicture( VLC_OBJECT(p_demux), &p_sys->pic, p_sys->i_fourcc,
+ p_sys->i_width, p_sys->i_height, p_sys->i_width *
+ VOUT_ASPECT_FACTOR / p_sys->i_height );
+ if( !p_sys->pic.i_planes )
+ {
+ msg_Err( p_demux, "unsupported chroma" );
goto open_failed;
}
+ p_sys->i_video_frame_size = 0;
+ for( int i = 0; i < p_sys->pic.i_planes; i++ )
+ {
+ p_sys->i_video_frame_size += p_sys->pic.p[i].i_visible_lines * p_sys->pic.p[i].i_visible_pitch;
+ }
+
+ /* Init IO method */
+ switch( p_sys->io )
+ {
+ case IO_METHOD_READ:
+ if( InitRead( p_demux, i_fd, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
+ break;
+
+ case IO_METHOD_MMAP:
+ if( InitMmap( p_demux, i_fd ) != VLC_SUCCESS ) goto open_failed;
+ break;
+
+ case IO_METHOD_USERPTR:
+ if( InitUserP( p_demux, i_fd, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
+ break;
+
+ }
+
+ /* Add */
+ es_format_t es_fmt;
+ es_format_Init( &es_fmt, VIDEO_ES, p_sys->i_fourcc );
+ es_fmt.video.i_width = p_sys->i_width;
+ es_fmt.video.i_height = p_sys->i_height;
+ es_fmt.video.i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
+
+ /* Setup rgb mask for RGB formats */
+ if( p_sys->i_fourcc == VLC_FOURCC( 'R','V','2','4' ) )
+ {
+ /* This is in BGR format */
+ es_fmt.video.i_bmask = 0x00ff0000;
+ es_fmt.video.i_gmask = 0x0000ff00;
+ es_fmt.video.i_rmask = 0x000000ff;
+ }
- return VLC_SUCCESS;
+ msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
+ (char*)&es_fmt.i_codec, es_fmt.video.i_width, es_fmt.video.i_height );
+ p_sys->p_es_video = es_out_Add( p_demux->out, &es_fmt );
+
+ /* Start Capture */
+
+ switch( p_sys->io )
+ {
+ case IO_METHOD_READ:
+ /* Nothing to do */
+ break;
+
+ case IO_METHOD_MMAP:
+ for (unsigned int i = 0; i < p_sys->i_nbuffers; ++i)
+ {
+ struct v4l2_buffer buf;
+
+ memset( &buf, 0, sizeof(buf) );
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_MMAP;
+ buf.index = i;
+
+ if( ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 ) {
+ msg_Err( p_demux, "VIDIOC_QBUF failed" );
+ goto open_failed;
+ }
+ }
+
+ buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ if( ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 ) {
+ msg_Err( p_demux, "VIDIOC_STREAMON failed" );
+ goto open_failed;
+ }
+
+ break;
+
+ case IO_METHOD_USERPTR:
+ for( unsigned int i = 0; i < p_sys->i_nbuffers; ++i )
+ {
+ struct v4l2_buffer buf;
+
+ memset( &buf, 0, sizeof(buf) );
+ buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ buf.memory = V4L2_MEMORY_USERPTR;
+ buf.index = i;
+ buf.m.userptr = (unsigned long)p_sys->p_buffers[i].start;
+ buf.length = p_sys->p_buffers[i].length;
+
+ if( ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 ) {
+ msg_Err( p_demux, "VIDIOC_QBUF failed" );
+ goto open_failed;
+ }
+ }
+
+ buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ if( ioctl( i_fd, VIDIOC_STREAMON, &buf_type ) < 0 ) {
+ msg_Err( p_demux, "VIDIOC_STREAMON failed" );
+ goto open_failed;
+ }
+
+ break;
+ }
+
+ /* report fps */
+ if( p_sys->f_fps >= 0.1 )
+ {
+ msg_Dbg( p_demux, "User set fps=%f", p_sys->f_fps );
+ }
+
+ return i_fd;
open_failed:
if( i_fd ) close( i_fd );
- p_sys->i_fd_video = 0;
- return VLC_EGENERIC;
+ return -1;
}
/*****************************************************************************
- * ProbeDev: probe for capabilities
+ * OpenAudioDev: open and set up the audio device and probe for capabilities
*****************************************************************************/
-int ProbeDev( demux_t *p_demux )
+int OpenAudioDev( demux_t *p_demux, char *psz_device )
+{
+ demux_sys_t *p_sys = p_demux->p_sys;
+ int i_fd, i_format;
+
+ if( (i_fd = open( psz_device, O_RDONLY | O_NONBLOCK )) < 0 )
+ {
+ msg_Err( p_demux, "cannot open audio device (%m)" );
+ goto adev_fail;
+ }
+
+ i_format = AFMT_S16_LE;
+ if( ioctl( i_fd, SNDCTL_DSP_SETFMT, &i_format ) < 0
+ || i_format != AFMT_S16_LE )
+ {
+ msg_Err( p_demux, "cannot set audio format (16b little endian) "
+ "(%m)" );
+ goto adev_fail;
+ }
+
+ if( ioctl( i_fd, SNDCTL_DSP_STEREO,
+ &p_sys->b_stereo ) < 0 )
+ {
+ msg_Err( p_demux, "cannot set audio channels count (%m)" );
+ goto adev_fail;
+ }
+
+ if( ioctl( i_fd, SNDCTL_DSP_SPEED,
+ &p_sys->i_sample_rate ) < 0 )
+ {
+ msg_Err( p_demux, "cannot set audio sample rate (%m)" );
+ goto adev_fail;
+ }
+
+ msg_Dbg( p_demux, "opened adev=`%s' %s %dHz",
+ psz_device, p_sys->b_stereo ? "stereo" : "mono",
+ p_sys->i_sample_rate );
+
+ p_sys->i_audio_max_frame_size = 6 * 1024;
+
+ es_format_t fmt;
+ es_format_Init( &fmt, AUDIO_ES, VLC_FOURCC('a','r','a','w') );
+
+ fmt.audio.i_channels = p_sys->b_stereo ? 2 : 1;
+ fmt.audio.i_rate = p_sys->i_sample_rate;
+ fmt.audio.i_bitspersample = 16; /* FIXME ? */
+ fmt.audio.i_blockalign = fmt.audio.i_channels * fmt.audio.i_bitspersample / 8;
+ fmt.i_bitrate = fmt.audio.i_channels * fmt.audio.i_rate * fmt.audio.i_bitspersample;
+
+ msg_Dbg( p_demux, "new audio es %d channels %dHz",
+ fmt.audio.i_channels, fmt.audio.i_rate );
+
+ p_sys->p_es_audio = es_out_Add( p_demux->out, &fmt );
+
+ return i_fd;
+
+ adev_fail:
+
+ if( i_fd >= 0 ) close( i_fd );
+ return -1;
+
+}
+
+/*****************************************************************************
+ * ProbeVideoDev: probe video for capabilities
+ *****************************************************************************/
+vlc_bool_t ProbeVideoDev( demux_t *p_demux, char *psz_device )
{
int i_index;
+ int i_standard;
int i_fd;
demux_sys_t *p_sys = p_demux->p_sys;
+
+/* msg_Dbg( p_demux, "main device='%s'", p_sys->psz_device ); */
- if( ( i_fd = open( p_sys->psz_device, O_RDWR ) ) < 0 )
+ if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
{
- msg_Err( p_demux, "cannot open device (%m)" );
+ msg_Err( p_demux, "cannot open video device (%m)" );
goto open_failed;
}
if( ioctl( i_fd, VIDIOC_QUERYCAP, &p_sys->dev_cap ) < 0 )
{
- msg_Err( p_demux, "cannot get capabilities (%m)" );
+ msg_Err( p_demux, "cannot get video capabilities (%m)" );
goto open_failed;
}
- msg_Dbg( p_demux, "V4L2 device: %s using driver: %s (version: %u.%u.%u) on %s",
+ msg_Dbg( p_demux, "V4L2 device: %s using driver: %s (version: %u.%u.%u) on %s",
p_sys->dev_cap.card,
p_sys->dev_cap.driver,
(p_sys->dev_cap.version >> 16) & 0xFF,
if( ioctl( i_fd, VIDIOC_ENUMINPUT, &p_sys->p_inputs[i_index] ) )
{
- msg_Err( p_demux,
- "cannot get video input characteristics (%m)" );
+ msg_Err( p_demux, "cannot get video input characteristics (%m)" );
goto open_failed;
}
msg_Dbg( p_demux, "video input %i (%s) has type: %s",
"External analog input" );
}
}
+
+ /* Probe video standards */
+ if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
+ {
+ struct v4l2_standard t_standards;
+ t_standards.index = 0;
+ while( ioctl( i_fd, VIDIOC_ENUMSTD, &t_standards ) >=0 )
+ {
+ p_sys->i_standard++;
+ t_standards.index = p_sys->i_standard;
+ }
+
+ p_sys->p_standards = malloc( p_sys->i_standard * sizeof( struct v4l2_standard ) );
+ if( !p_sys->p_standards ) goto open_failed;
+ memset( p_sys->p_standards, 0, sizeof( struct v4l2_standard ) );
+
+ for( i_standard = 0; i_standard < p_sys->i_standard; i_standard++ )
+ {
+ p_sys->p_standards[i_standard].index = i_standard;
+
+ if( ioctl( i_fd, VIDIOC_ENUMSTD, &p_sys->p_standards[i_standard] ) )
+ {
+ msg_Err( p_demux, "cannot get video input standards (%m)" );
+ goto open_failed;
+ }
+ msg_Dbg( p_demux, "video standard %i is: %s",
+ i_standard,
+ p_sys->p_standards[i_standard].name);
+ }
+ }
/* initialize the structures for the ioctls */
for( i_index = 0; i_index < 32; i_index++ )
{
if( ioctl( i_fd, VIDIOC_G_AUDIO, &p_sys->p_audios[ p_sys->i_audio] ) < 0 )
{
- msg_Err( p_demux,
- "cannot get video input characteristics (%m)" );
+ msg_Err( p_demux, "cannot get video input characteristics (%m)" );
goto open_failed;
}
if( i_fd >= 0 ) close( i_fd );
- return VLC_SUCCESS;
+ return VLC_TRUE;
open_failed:
-
+
if( i_fd >= 0 ) close( i_fd );
- return VLC_EGENERIC;
+ return VLC_FALSE;
}
+
+/*****************************************************************************
+ * ProbeAudioDev: probe audio for capabilities
+ *****************************************************************************/
+vlc_bool_t ProbeAudioDev( demux_t *p_demux, char *psz_device )
+{
+ int i_fd = 0;
+ int i_caps;
+
+ if( ( i_fd = open( psz_device, O_RDONLY | O_NONBLOCK ) ) < 0 )
+ {
+ msg_Err( p_demux, "cannot open audio device (%m)" );
+ goto open_failed;
+ }
+
+ /* this will fail if the device is video */
+ if( ioctl( i_fd, SNDCTL_DSP_GETCAPS, &i_caps ) < 0 )
+ {
+ msg_Err( p_demux, "cannot get audio caps (%m)" );
+ goto open_failed;
+ }
+
+ if( i_fd ) close( i_fd );
+ return VLC_TRUE;
+
+open_failed:
+ if( i_fd ) close( i_fd );
+ return VLC_FALSE;
+
+}
+
projects / vlc / commitdiff