/*****************************************************************************
* 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 $
+ * Copyright (C) 2002-2007 the VideoLAN team
+ * $Id$
*
* 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
+ *
+ * ALSA support based on parts of
+ * http://www.equalarea.com/paul/alsa-audio.html
+ * and hints taken from alsa-utils (aplay/arecord)
+ * http://www.alsa-project.org
+ */
+
+/*
+ * TODO: No mjpeg support yet.
+ * TODO: Tuner partial implementation.
+ * TODO: Alsa input support - experimental
+ */
/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
#include <vlc/vlc.h>
#include <vlc_access.h>
+#include <vlc_demux.h>
#include <vlc_input.h>
#include <vlc_vout.h>
#include <fcntl.h>
#include <unistd.h>
-#include <sys/types.h>
-#include <sys/time.h>
#include <sys/ioctl.h>
-#include <sys/errno.h>
-
-#include <asm/types.h> /* for videodev2.h */
+#include <sys/mman.h>
#include <linux/videodev2.h>
+#include <sys/soundcard.h>
+
+#ifdef HAVE_ALSA
+# define ALSA_PCM_NEW_HW_PARAMS_API
+# define ALSA_PCM_NEW_SW_PARAMS_API
+# include <alsa/asoundlib.h>
+#endif
+
/*****************************************************************************
* 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 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 WIDTH_TEXT N_( "Width" )
+#define WIDTH_LONGTEXT N_( \
+ "Force width (-1 for autodetect)." )
+#define HEIGHT_TEXT N_( "Height" )
+#define HEIGHT_LONGTEXT N_( \
+ "Force height (-1 for autodetect)." )
+#define FPS_TEXT N_( "Framerate" )
+#define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
+ "(-1 for autodetect)." )
+
+#define BRIGHTNESS_TEXT N_( "Brightness" )
+#define BRIGHTNESS_LONGTEXT N_( \
+ "Brightness of the video input." )
+#define CONTRAST_TEXT N_( "Contrast" )
+#define CONTRAST_LONGTEXT N_( \
+ "Contrast of the video input." )
+#define SATURATION_TEXT N_( "Saturation" )
+#define SATURATION_LONGTEXT N_( \
+ "Saturation of the video input." )
+#define HUE_TEXT N_( "Hue" )
+#define HUE_LONGTEXT N_( \
+ "Hue of the video input." )
+#define GAMMA_TEXT N_( "Gamma" )
+#define GAMMA_LONGTEXT N_( \
+ "Gamma of the video input." )
+
+#define ADEV_TEXT N_("Audio device name")
+#define ADEV_LONGTEXT N_( \
+ "Name of the audio device to use. " \
+ "If you don't specify anything, /dev/dsp will be used.")
+#define ALSA_TEXT N_( "Use Alsa" )
+#define ALSA_LONGTEXT N_( \
+ "Use ALSA instead of OSS for audio" )
+#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") );
set_category( CAT_INPUT );
set_subcategory( SUBCAT_INPUT_ACCESS );
+ set_section( N_( "Video input" ), NULL );
add_string( "v4l2-dev", "/dev/video0", 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_TRUE );
+ change_integer_list( i_iomethod_list, psz_iomethod_list_text, 0 );
+ add_integer( "v4l2-width", 0, NULL, WIDTH_TEXT,
+ WIDTH_LONGTEXT, VLC_TRUE );
+ add_integer( "v4l2-height", 0, NULL, HEIGHT_TEXT,
+ HEIGHT_LONGTEXT, VLC_TRUE );
+ add_float( "v4l2-fps", 0, NULL, FPS_TEXT, FPS_LONGTEXT, VLC_TRUE );
+
+ set_section( N_( "Video controls" ), NULL );
+ add_integer( "v4l2-brightness", -1, NULL, BRIGHTNESS_TEXT,
+ BRIGHTNESS_LONGTEXT, VLC_TRUE );
+ add_integer( "v4l2-contrast", -1, NULL, CONTRAST_TEXT,
+ CONTRAST_LONGTEXT, VLC_TRUE );
+ add_integer( "v4l2-saturation", -1, NULL, SATURATION_TEXT,
+ SATURATION_LONGTEXT, VLC_TRUE );
+ add_integer( "v4l2-hue", -1, NULL, HUE_TEXT,
+ HUE_LONGTEXT, VLC_TRUE );
+ add_integer( "v4l2-gamma", -1, NULL, GAMMA_TEXT,
+ GAMMA_LONGTEXT, VLC_TRUE );
+
+ set_section( N_( "Audio input" ), NULL );
+ add_string( "v4l2-adev", "/dev/dsp", 0, ADEV_TEXT, ADEV_LONGTEXT,
+ VLC_FALSE );
+#ifdef HAVE_ALSA
+ add_bool( "v4l2-alsa", VLC_FALSE, NULL, ALSA_TEXT, ALSA_LONGTEXT,
+ VLC_TRUE );
+#endif
+ 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 );
+
+vlc_bool_t IsPixelFormatSupported( demux_t *p_demux, unsigned int i_pixelformat );
+
+char* ResolveALSADeviceName( char *psz_device );
+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 block_t *GrabVideo( demux_t * );
+static int VideoControlList( demux_t *p_demux, int i_fd );
+static int VideoControl( demux_t *, int i_fd,
+ const char *psz_label, int i_cid, int i_value );
+static int VideoControlCallback( vlc_object_t *p_this,
+ const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
+ void *p_data );
+
+static struct
+{
+ 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 }
+};
+
+struct buffer_t
+{
+ void * start;
+ size_t length;
+ void * orig_userp;
+};
struct demux_sys_t
{
- char *psz_device;
+ char *psz_device; /* Main device from MRL, can be video or audio */
+
+ char *psz_vdev;
+ int i_fd_video;
- int i_fd_video;
+ char *psz_adev;
+ int i_fd_audio;
+
+ char *psz_requested_chroma;
+
+ /* Video */
+ io_method io;
+
+ int i_pts;
struct v4l2_capability dev_cap;
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 */
struct v4l2_audio p_audios[32];
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;
+
+ int i_brightness;
+ int i_contrast;
+ int i_saturation;
+ int i_hue;
+ int i_gamma;
+
+ picture_t pic;
+ int i_video_frame_size;
+
+ es_out_id_t *p_es_video;
+
+ /* Audio */
+ unsigned 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;
+
+#ifdef HAVE_ALSA
+ /* ALSA Audio */
+ vlc_bool_t b_use_alsa;
+ snd_pcm_t *p_alsa_pcm;
+ int i_alsa_frame_size;
+ int i_alsa_chunk_size;
+#endif
};
/*****************************************************************************
- * Open: opens v4l device
+ * Open: opens v4l2 device
*****************************************************************************
*
* url: <video device>::::
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys;
- demux_sys_t sys;
+ vlc_value_t val;
+
+ /* Only when selected */
+ 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 = calloc( 1, sizeof( demux_sys_t ) );
+ if( p_sys == NULL ) return VLC_ENOMEM;
+
+ 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" );
+
+ p_sys->i_width = var_CreateGetInteger( p_demux, "v4l2-width" );
+ p_sys->i_height = var_CreateGetInteger( p_demux, "v4l2-height" );
+
+ p_sys->i_brightness =
+ var_CreateGetIntegerCommand( p_demux, "v4l2-brightness" );
+ p_sys->i_contrast =
+ var_CreateGetIntegerCommand( p_demux, "v4l2-contrast" );
+ p_sys->i_saturation =
+ var_CreateGetIntegerCommand( p_demux, "v4l2-saturation" );
+ p_sys->i_hue =
+ var_CreateGetIntegerCommand( p_demux, "v4l2-hue" );
+ p_sys->i_gamma =
+ var_CreateGetIntegerCommand( p_demux, "v4l2-gamma" );
+
+ var_AddCallback( p_demux, "v4l2-brightness", VideoControlCallback, NULL );
+ var_AddCallback( p_demux, "v4l2-contrast", VideoControlCallback, NULL );
+ var_AddCallback( p_demux, "v4l2-saturation", VideoControlCallback, NULL );
+ var_AddCallback( p_demux, "v4l2-hue", VideoControlCallback, NULL );
+ var_AddCallback( p_demux, "v4l2-gamma", VideoControlCallback, NULL );
+
+ var_Create( p_demux, "videocontrol", VLC_VAR_STRING | VLC_VAR_ISCOMMAND );
+ var_AddCallback( p_demux, "videocontrol", VideoControlCallback, NULL );
+
+ 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;
+
+ p_sys->psz_requested_chroma = var_CreateGetString( p_demux, "v4l2-chroma" );
+
+#ifdef HAVE_ALSA
+ var_Create( p_demux, "v4l2-alsa", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
+ var_Get( p_demux, "v4l2-alsa", &val );
+ p_sys->b_use_alsa = val.b_bool;
+#endif
+
+ 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 );
+
+#ifdef HAVE_ALSA
+ /* Alsa support available? */
+ msg_Dbg( p_demux, "ALSA input support available" );
+#endif
+
+ /* 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 );
+
+ /* 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 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;
+ }
+ }
+
+ /* 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" );
+ }
+
+ msg_Dbg( p_demux, "opening '%s' as video", p_sys->psz_vdev );
+ 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" );
+ }
+
+ msg_Dbg( p_demux, "opening '%s' as audio", p_sys->psz_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 );
+ }
+
+ if( p_sys->psz_requested_chroma ) free( p_sys->psz_requested_chroma );
+ p_sys->psz_requested_chroma = strndup( psz_parser, i_len );
+
+ 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, "width=",
+ strlen( "width=" ) ) )
+ {
+ p_sys->i_width =
+ strtol( psz_parser + strlen( "width=" ),
+ &psz_parser, 0 );
+ }
+ else if( !strncmp( psz_parser, "height=",
+ strlen( "height=" ) ) )
+ {
+ p_sys->i_height =
+ strtol( psz_parser + strlen( "height=" ),
+ &psz_parser, 0 );
+ }
+ else if( !strncmp( psz_parser, "brightness=",
+ strlen( "brightness=" ) ) )
+ {
+ p_sys->i_brightness =
+ strtol( psz_parser + strlen( "brightness=" ),
+ &psz_parser, 0 );
+ }
+ else if( !strncmp( psz_parser, "contrast=",
+ strlen( "contrast=" ) ) )
+ {
+ p_sys->i_contrast =
+ strtol( psz_parser + strlen( "contrast=" ),
+ &psz_parser, 0 );
+ }
+ else if( !strncmp( psz_parser, "saturation=",
+ strlen( "saturation=" ) ) )
+ {
+ p_sys->i_saturation =
+ strtol( psz_parser + strlen( "saturation=" ),
+ &psz_parser, 0 );
+ }
+ else if( !strncmp( psz_parser, "hue=",
+ strlen( "hue=" ) ) )
+ {
+ p_sys->i_hue =
+ strtol( psz_parser + strlen( "hue=" ),
+ &psz_parser, 0 );
+ }
+ else if( !strncmp( psz_parser, "gamma=",
+ strlen( "gamma=" ) ) )
+ {
+ p_sys->i_gamma =
+ strtol( psz_parser + strlen( "gamma=" ),
+ &psz_parser, 0 );
+ }
+ else if( !strncmp( psz_parser, "samplerate=",
+ strlen( "samplerate=" ) ) )
+ {
+ p_sys->i_sample_rate =
+ strtol( psz_parser + strlen( "samplerate=" ),
+ &psz_parser, 0 );
+ }
+#ifdef HAVE_ALSA
+ else if( !strncmp( psz_parser, "alsa", strlen( "alsa" ) ) )
+ {
+ psz_parser += strlen( "alsa" );
+ p_sys->b_use_alsa = VLC_TRUE;
+ }
+#endif
+ 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, 0 );
+ }
+ 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;
+ 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 = ( p_sys->io == IO_METHOD_USERPTR ) ?
+ V4L2_MEMORY_USERPTR : V4L2_MEMORY_MMAP;
+ 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;
+ }
+ }
+
+ /* 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].orig_userp );
+ }
+ break;
+ }
+ free( p_sys->p_buffers );
+ }
+
+ /* Close */
+ if( p_sys->i_fd_video >= 0 ) close( p_sys->i_fd_video );
+#ifdef HAVE_ALSA
+ if( p_sys->b_use_alsa )
+ {
+ if( p_sys->p_alsa_pcm ) snd_pcm_close( p_sys->p_alsa_pcm );
+ }
+ else
+#endif
+ {
+ if( p_sys->i_fd_audio >= 0 ) close( p_sys->i_fd_audio );
+ }
+
+ 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 );
+ if( p_sys->psz_requested_chroma ) free( p_sys->psz_requested_chroma );
+
+ free( p_sys );
+}
+
+/*****************************************************************************
+ * Control:
+ *****************************************************************************/
+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: Processes the audio or video frame
+ *****************************************************************************/
+static int Demux( demux_t *p_demux )
+{
+ 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;
+
+ 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;
+
+#ifdef HAVE_ALSA
+ if( p_sys->b_use_alsa )
+ {
+ /* ALSA */
+ i_read = snd_pcm_readi( p_sys->p_alsa_pcm, p_block->p_buffer, p_sys->i_alsa_chunk_size );
+ /* TODO: ALSA ERROR HANDLING?? xrun?? */
+ }
+ else
+#endif
+ {
+ /* OSS */
+ 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;
+#ifdef HAVE_ALSA
+ if( !p_sys->b_use_alsa )
+#endif
+ {
+ if( ioctl( p_sys->i_fd_audio, SNDCTL_DSP_GETISPACE, &buf_info ) == 0 )
+ {
+ i_correct += buf_info.bytes;
+ }
+ }
+#ifdef HAVE_ALSA
+ else
+ {
+ /* TODO: ALSA timing */
+ /* Very experimental code... */
+ int i_err;
+ snd_pcm_sframes_t delay = 0;
+ if( ( i_err = snd_pcm_delay( p_sys->p_alsa_pcm, &delay ) ) >= 0 )
+ {
+ int i_correction_delta = delay * p_sys->i_alsa_frame_size;
+ /* Test for overrun */
+ if( i_correction_delta>p_sys->i_audio_max_frame_size )
+ {
+ msg_Warn( p_demux, "ALSA read overrun" );
+ i_correction_delta = p_sys->i_audio_max_frame_size;
+ snd_pcm_prepare( p_sys->p_alsa_pcm );
+ }
+ i_correct += i_correction_delta;
+ }
+ else
+ {
+ /* delay failed so reset */
+ msg_Warn( p_demux, "ALSA snd_pcm_delay failed (%s)", snd_strerror( i_err ) );
+ snd_pcm_prepare( p_sys->p_alsa_pcm );
+ }
+ }
+#endif
+
+ /* 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, i_fd, buf.m.offset );
+
+ if( p_sys->p_buffers[p_sys->i_nbuffers].start == MAP_FAILED )
+ {
+ msg_Err( p_demux, "mmap failed (%m)" );
+ 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;
+ unsigned int i_page_size;
+
+ i_page_size = getpagesize();
+ i_buffer_size = ( i_buffer_size + i_page_size - 1 ) & ~( i_page_size - 1);
+
+ 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 =
+ vlc_memalign( &p_sys->p_buffers[p_sys->i_nbuffers].orig_userp,
+ /* boundary */ i_page_size, 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;
+
+}
+
+/*****************************************************************************
+ * IsPixelFormatSupported: returns true if the specified V4L2 pixel format is
+ * in the array of supported formats returned by the driver
+ *****************************************************************************/
+vlc_bool_t IsPixelFormatSupported( demux_t *p_demux, unsigned int i_pixelformat )
+{
+ 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_pixelformat ) return VLC_TRUE;
+ }
+
+ return VLC_FALSE;
+}
+
+/*****************************************************************************
+ * OpenVideoDev: open and set up the video device and probe for capabilities
+ *****************************************************************************/
+int OpenVideoDev( demux_t *p_demux, char *psz_device )
+{
+ int i_fd;
+ demux_sys_t *p_sys = p_demux->p_sys;
+ 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;
+ }
+
+ /* 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 standard (%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" );
+ p_sys->i_selected_input = 0;
+ }
+
+ if( ioctl( i_fd, VIDIOC_S_INPUT, &p_sys->i_selected_input ) < 0 )
+ {
+ msg_Err( p_demux, "cannot set input (%m)" );
+ goto open_failed;
+ }
+
+ /* Verify device support for the various IO methods */
+ switch( p_sys->io )
+ {
+ case IO_METHOD_READ:
+ if( !(p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE) )
+ {
+ 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 */
+ memset( &fmt, 0, sizeof(fmt) );
+ fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ if( p_sys->i_width <= 0 || p_sys->i_height <= 0 )
+ {
+ 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;
+ }
+ }
+ else
+ {
+ msg_Dbg( p_demux, "trying specified size %dx%d", p_sys->i_width, p_sys->i_height );
+ }
+
+ 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->psz_requested_chroma && strlen( p_sys->psz_requested_chroma ) > 0 )
+ {
+ /* User specified chroma */
+ if( strlen( p_sys->psz_requested_chroma ) >= 4 )
+ {
+ int i_requested_fourcc = VLC_FOURCC(
+ p_sys->psz_requested_chroma[0], p_sys->psz_requested_chroma[1],
+ p_sys->psz_requested_chroma[2], p_sys->psz_requested_chroma[3] );
+ for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
+ {
+ if( v4l2chroma_to_fourcc[i].i_fourcc == i_requested_fourcc )
+ {
+ fmt.fmt.pix.pixelformat = v4l2chroma_to_fourcc[i].i_v4l2;
+ break;
+ }
+ }
+ }
+ /* Try and set user chroma */
+ if( !IsPixelFormatSupported( 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 %s. Trying defaults.", p_sys->psz_requested_chroma );
+ fmt.fmt.pix.pixelformat = 0;
+ }
+ }
+
+ /* If no user specified chroma, find best */
+ if( !fmt.fmt.pix.pixelformat )
+ {
+ fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YVU420;
+ if( !IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat ) || ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
+ {
+ fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUV422P;
+ if( !IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat ) || ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
+ {
+ fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
+ if( !IsPixelFormatSupported( 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;
+
+#ifdef VIDIOC_ENUM_FRAMEINTERVALS
+ /* This is new in Linux 2.6.19 */
+ /* List supported frame rates */
+ struct v4l2_frmivalenum frmival;
+ frmival.index = 0;
+ frmival.pixel_format = fmt.fmt.pix.pixelformat;
+ frmival.width = p_sys->i_width;
+ frmival.height = p_sys->i_height;
+ if( ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
+ {
+ char sz_fourcc[5];
+ memset( &sz_fourcc, 0, sizeof( sz_fourcc ) );
+ vlc_fourcc_to_char( p_sys->i_fourcc, &sz_fourcc );
+ msg_Dbg( p_demux, "supported frame intervals for %4s, %dx%d:",
+ sz_fourcc, frmival.width, frmival.height );
+ switch( frmival.type )
+ {
+ case V4L2_FRMIVAL_TYPE_DISCRETE:
+ do
+ {
+ msg_Dbg( p_demux, " supported frame interval: %d/%d",
+ frmival.discrete.numerator,
+ frmival.discrete.denominator );
+ frmival.index++;
+ } while( ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 );
+ break;
+ case V4L2_FRMIVAL_TYPE_STEPWISE:
+ msg_Dbg( p_demux, " supported frame intervals: %d/%d to "
+ "%d/%d using %d/%d increments",
+ frmival.stepwise.min.numerator,
+ frmival.stepwise.min.denominator,
+ frmival.stepwise.max.numerator,
+ frmival.stepwise.max.denominator,
+ frmival.stepwise.step.numerator,
+ frmival.stepwise.step.denominator );
+ break;
+ case V4L2_FRMIVAL_TYPE_CONTINUOUS:
+ msg_Dbg( p_demux, " supported frame intervals: %d/%d to %d/%d",
+ frmival.stepwise.min.numerator,
+ frmival.stepwise.min.denominator,
+ frmival.stepwise.max.numerator,
+ frmival.stepwise.max.denominator );
+ break;
+ }
+ }
+#endif
+
+ VideoControlList( p_demux, i_fd );
+
+ VideoControl( p_demux, i_fd,
+ "brightness", V4L2_CID_BRIGHTNESS, p_sys->i_brightness );
+ VideoControl( p_demux, i_fd,
+ "contrast", V4L2_CID_CONTRAST, p_sys->i_contrast );
+ VideoControl( p_demux, i_fd,
+ "saturation", V4L2_CID_SATURATION, p_sys->i_saturation );
+ VideoControl( p_demux, i_fd, "hue", V4L2_CID_HUE, p_sys->i_hue );
+ VideoControl( p_demux, i_fd, "gamma", V4L2_CID_GAMMA, p_sys->i_gamma );
+
+ /* 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;
+ }
+
+ 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;
+ }
+ }
- /* Set up p_demux */
- p_demux->pf_control = Control;
- p_demux->info.i_update = 0;
- p_demux->info.i_title = 0;
- p_demux->info.i_seekpoint = 0;
+ 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;
+ }
- 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 ) );
+ break;
- p_sys->psz_device = var_CreateGetString( p_demux, "v4l2-dev" );
+ case IO_METHOD_USERPTR:
+ for( unsigned int i = 0; i < p_sys->i_nbuffers; ++i )
+ {
+ struct v4l2_buffer buf;
- if( ProbeDev( p_demux ) < 0 ) return VLC_EGENERIC;
+ 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( OpenVideoDev( p_demux ) < 0 ) return VLC_EGENERIC;
+ if( ioctl( i_fd, VIDIOC_QBUF, &buf ) < 0 )
+ {
+ msg_Err( p_demux, "VIDIOC_QBUF failed" );
+ goto open_failed;
+ }
+ }
- return VLC_SUCCESS;
-}
+ 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;
+ }
-/*****************************************************************************
- * 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;
+ break;
+ }
- if( p_sys->i_fd_video >= 0 ) close( p_sys->i_fd_video );
+ /* report fps */
+ if( p_sys->f_fps >= 0.1 )
+ {
+ msg_Dbg( p_demux, "User set fps=%f", p_sys->f_fps );
+ }
- if( p_sys->psz_device ) free( p_sys->psz_device );
- 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 );
+ return i_fd;
- free( p_sys );
-}
+open_failed:
+ if( i_fd >= 0 ) close( i_fd );
+ return -1;
-/*****************************************************************************
- * Control:
- *****************************************************************************/
-static int Control( demux_t *p_demux, int i_query, va_list args )
-{
}
+#ifdef HAVE_ALSA
/*****************************************************************************
- * Demux:
+ * ResolveALSADeviceName: Change any . to : in the ALSA device name
*****************************************************************************/
-static int DemuxMMAP( demux_t *p_demux )
+char* ResolveALSADeviceName( char *psz_device )
{
+ char* psz_alsa_name = strdup( psz_device );
+ for( unsigned int i = 0; i < strlen( psz_device ); i++ )
+ {
+ if( psz_alsa_name[i] == '.' ) psz_alsa_name[i] = ':';
+ }
+ return psz_alsa_name;
}
-
+#endif
/*****************************************************************************
- * OpenVideoDev: open and set up the video device and probe for capabilities
+ * OpenAudioDev: open and set up the audio device and probe for capabilities
*****************************************************************************/
-int OpenVideoDev( demux_t *p_demux )
+int OpenAudioDev( 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 )
+ int i_fd = 0;
+ int i_format;
+#ifdef HAVE_ALSA
+ p_sys->p_alsa_pcm = NULL;
+ char* psz_alsa_device_name = ResolveALSADeviceName( psz_device );
+ snd_pcm_hw_params_t *p_hw_params = NULL;
+ snd_pcm_uframes_t buffer_size;
+ snd_pcm_uframes_t chunk_size;
+#endif
+
+#ifdef HAVE_ALSA
+ if( p_sys->b_use_alsa )
{
- msg_Err( p_demux, "cannot open device (%s)", strerror( errno ) );
- goto open_failed;
- }
+ /* ALSA */
- p_sys->i_fd_video = i_fd;
+ int i_err;
- if( p_sys->i_selected_input = var_CreateGetInteger( p_demux, "v4l2-input" )
- > p_sys->i_input )
- {
- msg_Warn( p_demux, "invalid input. Using the default one" );
- p_sys->i_selected_input = 0;
- }
+ if( ( i_err = snd_pcm_open( &p_sys->p_alsa_pcm, psz_alsa_device_name,
+ SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK ) ) < 0)
+ {
+ msg_Err( p_demux, "Cannot open ALSA audio device %s (%s)",
+ psz_alsa_device_name,
+ snd_strerror( i_err ) );
+ goto adev_fail;
+ }
- if( ioctl( i_fd, VIDIOC_S_INPUT, &p_sys->i_selected_input ) < 0 )
- {
- msg_Err( p_demux, "cannot set input (%s)", strerror( errno ) );
- goto open_failed;
- }
+ if( ( i_err = snd_pcm_nonblock( p_sys->p_alsa_pcm, 1 ) ) < 0)
+ {
+ msg_Err( p_demux, "Cannot set ALSA nonblock (%s)",
+ snd_strerror( i_err ) );
+ goto adev_fail;
+ }
- if( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING )
- {
- struct v4l2_requestbuffers reqbuf;
+ /* Begin setting hardware parameters */
+
+ if( ( i_err = snd_pcm_hw_params_malloc( &p_hw_params ) ) < 0 )
+ {
+ msg_Err( p_demux, "ALSA: cannot allocate hardware parameter structure (%s)",
+ snd_strerror( i_err ) );
+ goto adev_fail;
+ }
- reqbuf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- reqbuf.memory = V4L2_MEMORY_MMAP;
- reqbuf.count = 0;
+ if( ( i_err = snd_pcm_hw_params_any( p_sys->p_alsa_pcm, p_hw_params ) ) < 0 )
+ {
+ msg_Err( p_demux, "ALSA: cannot initialize hardware parameter structure (%s)",
+ snd_strerror( i_err ) );
+ goto adev_fail;
+ }
- if( ioctl( i_fd, VIDIOC_REQBUFS, &reqbuf ) < 0 )
+ /* Set Interleaved access */
+ if( ( i_err = snd_pcm_hw_params_set_access( p_sys->p_alsa_pcm, p_hw_params, SND_PCM_ACCESS_RW_INTERLEAVED ) ) < 0 )
{
- msg_Err( p_demux, "cannot initiate I/O operation (%s). "
- "Only MMAP is supported at the moment", strerror( errno ) );
- goto open_failed;
+ msg_Err( p_demux, "ALSA: cannot set access type (%s)",
+ snd_strerror( i_err ) );
+ goto adev_fail;
+ }
+
+ /* Set 16 bit little endian */
+ if( ( i_err = snd_pcm_hw_params_set_format( p_sys->p_alsa_pcm, p_hw_params, SND_PCM_FORMAT_S16_LE ) ) < 0 )
+ {
+ msg_Err( p_demux, "ALSA: cannot set sample format (%s)",
+ snd_strerror( i_err ) );
+ goto adev_fail;
+ }
+
+ /* Set sample rate */
+#ifdef HAVE_ALSA_NEW_API
+ i_err = snd_pcm_hw_params_set_rate_near( p_sys->p_alsa_pcm, p_hw_params, &p_sys->i_sample_rate, NULL );
+#else
+ i_err = snd_pcm_hw_params_set_rate_near( p_sys->p_alsa_pcm, p_hw_params, p_sys->i_sample_rate, NULL );
+#endif
+ if( i_err < 0 )
+ {
+ msg_Err( p_demux, "ALSA: cannot set sample rate (%s)",
+ snd_strerror( i_err ) );
+ goto adev_fail;
+ }
+
+ /* Set channels */
+ unsigned int channels = p_sys->b_stereo ? 2 : 1;
+ if( ( i_err = snd_pcm_hw_params_set_channels( p_sys->p_alsa_pcm, p_hw_params, channels ) ) < 0 )
+ {
+ channels = ( channels==1 ) ? 2 : 1;
+ msg_Warn( p_demux, "ALSA: cannot set channel count (%s). Trying with channels=%d",
+ snd_strerror( i_err ),
+ channels );
+ if( ( i_err = snd_pcm_hw_params_set_channels( p_sys->p_alsa_pcm, p_hw_params, channels ) ) < 0 )
+ {
+ msg_Err( p_demux, "ALSA: cannot set channel count (%s)",
+ snd_strerror( i_err ) );
+ goto adev_fail;
+ }
+ p_sys->b_stereo = ( channels == 2 );
+ }
+
+ /* Set metrics for buffer calculations later */
+ unsigned int buffer_time;
+ if( ( i_err = snd_pcm_hw_params_get_buffer_time_max(p_hw_params, &buffer_time, 0) ) < 0 )
+ {
+ msg_Err( p_demux, "ALSA: cannot get buffer time max (%s)",
+ snd_strerror( i_err ) );
+ goto adev_fail;
+ }
+ if (buffer_time > 500000) buffer_time = 500000;
+
+ /* Set period time */
+ unsigned int period_time = buffer_time / 4;
+#ifdef HAVE_ALSA_NEW_API
+ i_err = snd_pcm_hw_params_set_period_time_near( p_sys->p_alsa_pcm, p_hw_params, &period_time, 0 );
+#else
+ i_err = snd_pcm_hw_params_set_period_time_near( p_sys->p_alsa_pcm, p_hw_params, period_time, 0 );
+#endif
+ if( i_err < 0 )
+ {
+ msg_Err( p_demux, "ALSA: cannot set period time (%s)",
+ snd_strerror( i_err ) );
+ goto adev_fail;
+ }
+
+ /* Set buffer time */
+#ifdef HAVE_ALSA_NEW_API
+ i_err = snd_pcm_hw_params_set_buffer_time_near( p_sys->p_alsa_pcm, p_hw_params, &buffer_time, 0 );
+#else
+ i_err = snd_pcm_hw_params_set_buffer_time_near( p_sys->p_alsa_pcm, p_hw_params, buffer_time, 0 );
+#endif
+ if( i_err < 0 )
+ {
+ msg_Err( p_demux, "ALSA: cannot set buffer time (%s)",
+ snd_strerror( i_err ) );
+ goto adev_fail;
+ }
+
+ /* Apply new hardware parameters */
+ if( ( i_err = snd_pcm_hw_params( p_sys->p_alsa_pcm, p_hw_params ) ) < 0 )
+ {
+ msg_Err( p_demux, "ALSA: cannot set hw parameters (%s)",
+ snd_strerror( i_err ) );
+ goto adev_fail;
+ }
+
+ /* Get various buffer metrics */
+ snd_pcm_hw_params_get_period_size( p_hw_params, &chunk_size, 0 );
+ snd_pcm_hw_params_get_buffer_size( p_hw_params, &buffer_size );
+ if (chunk_size == buffer_size)
+ {
+ msg_Err( p_demux, "ALSA: period cannot equal buffer size (%lu == %lu)",
+ chunk_size, buffer_size);
+ goto adev_fail;
+ }
+
+ int bits_per_sample = snd_pcm_format_physical_width(SND_PCM_FORMAT_S16_LE);
+ int bits_per_frame = bits_per_sample * channels;
+
+ p_sys->i_alsa_chunk_size = chunk_size;
+ p_sys->i_alsa_frame_size = (bits_per_sample / 8) * channels;
+ p_sys->i_audio_max_frame_size = chunk_size * bits_per_frame / 8;
+
+ snd_pcm_hw_params_free( p_hw_params );
+ p_hw_params = NULL;
+
+ /* Prep device */
+ if( ( i_err = snd_pcm_prepare( p_sys->p_alsa_pcm ) ) < 0 )
+ {
+ msg_Err( p_demux, "ALSA: cannot prepare audio interface for use (%s)",
+ snd_strerror( i_err ) );
+ goto adev_fail;
}
- p_demux->pf_demux = DemuxMMAP;
+
+ /* Return a fake handle so other tests work */
+ i_fd = 1;
+
}
else
+#endif /* HAVE_ALSA */
{
- msg_Warn( p_demux, "I/O method not supported at the moment" );
- goto open_failed;
+ /* OSS */
+
+ if( (i_fd = open( psz_device, O_RDONLY | O_NONBLOCK )) < 0 )
+ {
+ msg_Err( p_demux, "cannot open OSS 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;
+ }
+
+ p_sys->i_audio_max_frame_size = 6 * 1024;
}
- return VLC_SUCCESS;
+ msg_Dbg( p_demux, "opened adev=`%s' %s %dHz",
+ psz_device, p_sys->b_stereo ? "stereo" : "mono",
+ p_sys->i_sample_rate );
-open_failed:
- if( i_fd ) close( i_fd );
- p_sys->i_fd_video = 0;
- return VLC_EGENERIC;
+ 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;
+ 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 );
+
+#ifdef HAVE_ALSA
+ free( psz_alsa_device_name );
+#endif
+
+ return i_fd;
+
+ adev_fail:
+
+ if( i_fd >= 0 ) close( i_fd );
+
+#ifdef HAVE_ALSA
+ if( p_hw_params ) snd_pcm_hw_params_free( p_hw_params );
+ if( p_sys->p_alsa_pcm ) snd_pcm_close( p_sys->p_alsa_pcm );
+ free( psz_alsa_device_name );
+#endif
+
+ return -1;
}
/*****************************************************************************
- * ProbeDev: probe for capabilities
+ * ProbeVideoDev: probe video for capabilities
*****************************************************************************/
-int ProbeDev( demux_t *p_demux )
+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;
- 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 (%s)", strerror( errno ) );
+ 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 (%s)", strerror( errno ) );
+ 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,
p_sys->i_input++;
}
- p_sys->p_inputs = malloc( p_sys->i_input * sizeof( struct v4l2_input ) );
+ p_sys->p_inputs = calloc( 1, p_sys->i_input * sizeof( struct v4l2_input ) );
if( !p_sys->p_inputs ) goto open_failed;
- memset( p_sys->p_inputs, 0, sizeof( struct v4l2_input ) );
for( i_index = 0; i_index < p_sys->i_input; i_index++ )
{
if( ioctl( i_fd, VIDIOC_ENUMINPUT, &p_sys->p_inputs[i_index] ) )
{
- msg_Err( p_demux, "cannot get video input characteristics (%s)",
- strerror( errno ) );
+ msg_Err( p_demux, "cannot get video input characteristics (%m)" );
goto open_failed;
}
msg_Dbg( p_demux, "video input %i (%s) has type: %s",
}
}
+ /* 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 = calloc( 1, p_sys->i_standard * sizeof( struct v4l2_standard ) );
+ if( !p_sys->p_standards ) goto open_failed;
+
+ 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 (%s)",
- strerror( errno ) );
+ msg_Err( p_demux, "cannot get audio input characteristics (%m)" );
goto open_failed;
}
if( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER )
{
- struct v4l2_tuner tuner = {};
+ struct v4l2_tuner tuner;
+ memset( &tuner, 0, sizeof(tuner) );
while( ioctl( i_fd, VIDIOC_S_TUNER, &tuner ) >= 0 )
{
p_sys->i_tuner++;
tuner.index = p_sys->i_tuner;
}
- p_sys->p_tuners = malloc( p_sys->i_tuner * sizeof( struct v4l2_tuner ) );
+ p_sys->p_tuners = calloc( 1, p_sys->i_tuner * sizeof( struct v4l2_tuner ) );
if( !p_sys->p_tuners ) goto open_failed;
- memset( p_sys->p_tuners, 0, sizeof( struct v4l2_tuner ) );
for( i_index = 0; i_index < p_sys->i_tuner; i_index++ )
{
if( ioctl( i_fd, VIDIOC_G_TUNER, &p_sys->p_tuners[i_index] ) )
{
- msg_Err( p_demux, "cannot get tuner characteristics (%s)",
- strerror( errno ) );
+ msg_Err( p_demux, "cannot get tuner characteristics (%m)" );
goto open_failed;
}
msg_Dbg( p_demux, "tuner %i (%s) has type: %s, "
/* Probe for available chromas */
if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
{
- struct v4l2_fmtdesc codec = {};
+ struct v4l2_fmtdesc codec;
i_index = 0;
+ memset( &codec, 0, sizeof(codec) );
codec.index = i_index;
codec.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
p_sys->i_codec = i_index;
- p_sys->p_codecs = malloc( p_sys->i_codec * sizeof( struct v4l2_fmtdesc ) );
- memset( p_sys->p_codecs, 0, p_sys->i_codec * sizeof( struct v4l2_fmtdesc ) );
+ p_sys->p_codecs = calloc( 1, p_sys->i_codec * sizeof( struct v4l2_fmtdesc ) );
for( i_index = 0; i_index < p_sys->i_codec; i_index++ )
{
if( ioctl( i_fd, VIDIOC_ENUM_FMT, &p_sys->p_codecs[i_index] ) < 0 )
{
- msg_Err( p_demux, "cannot get codec description (%s)", strerror( errno ) );
+ msg_Err( p_demux, "cannot get codec description (%m)" );
goto open_failed;
}
- msg_Dbg( p_demux, "device supports Codec %s",
+ /* only print if vlc supports the format */
+ vlc_bool_t b_codec_supported = VLC_FALSE;
+ for( int i = 0; v4l2chroma_to_fourcc[i].i_v4l2 != 0; i++ )
+ {
+ if( v4l2chroma_to_fourcc[i].i_v4l2 == p_sys->p_codecs[i_index].pixelformat )
+ {
+ b_codec_supported = VLC_TRUE;
+
+ char sz_fourcc[5];
+ memset( &sz_fourcc, 0, sizeof( sz_fourcc ) );
+ vlc_fourcc_to_char( v4l2chroma_to_fourcc[i].i_fourcc, &sz_fourcc );
+ msg_Dbg( p_demux, "device supports chroma %4s [%s]",
+ sz_fourcc,
p_sys->p_codecs[i_index].description );
+
+#ifdef VIDIOC_ENUM_FRAMESIZES
+ /* This is new in Linux 2.6.19 */
+ /* List valid frame sizes for this format */
+ struct v4l2_frmsizeenum frmsize;
+ frmsize.index = 0;
+ frmsize.pixel_format = p_sys->p_codecs[i_index].pixelformat;
+ if( ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) < 0 )
+ {
+ msg_Err( p_demux, "Error while querying for frame size" );
+ }
+ else
+ {
+ switch( frmsize.type )
+ {
+ case V4L2_FRMSIZE_TYPE_DISCRETE:
+ do
+ {
+ msg_Dbg( p_demux,
+ " device supports size %dx%d",
+ frmsize.discrete.width, frmsize.discrete.height );
+ frmsize.index++;
+ } while( ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 );
+ break;
+ case V4L2_FRMSIZE_TYPE_STEPWISE:
+ msg_Dbg( p_demux,
+ " device supports sizes %dx%d to %dx%d using %dx%d increments",
+ frmsize.stepwise.min_width, frmsize.stepwise.min_height,
+ frmsize.stepwise.max_width, frmsize.stepwise.max_height,
+ frmsize.stepwise.step_width, frmsize.stepwise.step_height );
+ break;
+ case V4L2_FRMSIZE_TYPE_CONTINUOUS:
+ msg_Dbg( p_demux,
+ " device supports all sizes %dx%d to %dx%d",
+ frmsize.stepwise.min_width, frmsize.stepwise.min_height,
+ frmsize.stepwise.max_width, frmsize.stepwise.max_height );
+ break;
+ }
+ }
+#endif
+ }
+ }
+ if( !b_codec_supported )
+ {
+ msg_Dbg( p_demux, "device codec %s not supported",
+ p_sys->p_codecs[i_index].description );
+ }
+
}
}
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;
+
+#ifdef HAVE_ALSA
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ if( p_sys->b_use_alsa )
+ {
+ /* ALSA */
+
+ int i_err;
+ snd_pcm_t *p_alsa_pcm;
+ char* psz_alsa_device_name = ResolveALSADeviceName( psz_device );
+
+ if( ( i_err = snd_pcm_open( &p_alsa_pcm, psz_alsa_device_name, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK ) ) < 0 )
+ {
+ msg_Err( p_demux, "cannot open device %s for ALSA audio (%s)", psz_alsa_device_name, snd_strerror( i_err ) );
+ free( psz_alsa_device_name );
+ goto open_failed;
+ }
+
+ snd_pcm_close( p_alsa_pcm );
+ free( psz_alsa_device_name );
+ }
+ else
+#endif /* HAVE_ALSA */
+ {
+ /* OSS */
+
+ if( ( i_fd = open( psz_device, O_RDONLY | O_NONBLOCK ) ) < 0 )
+ {
+ msg_Err( p_demux, "cannot open device %s for OSS audio (%m)", psz_device );
+ 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 >= 0 ) close( i_fd );
+ }
+
+ return VLC_TRUE;
+
+open_failed:
+ if( i_fd >= 0 ) close( i_fd );
+ return VLC_FALSE;
+
+}
+
+/*****************************************************************************
+ * List available controls
+ *****************************************************************************/
+static void VideoControlListPrint( demux_t *p_demux, int i_fd,
+ struct v4l2_queryctrl queryctrl )
+{
+ struct v4l2_querymenu querymenu;
+ if( queryctrl.flags & V4L2_CTRL_FLAG_GRABBED )
+ msg_Dbg( p_demux, " control is busy" );
+ if( queryctrl.flags & V4L2_CTRL_FLAG_READ_ONLY )
+ msg_Dbg( p_demux, " control is read-only" );
+ switch( queryctrl.type )
+ {
+ case V4L2_CTRL_TYPE_INTEGER:
+ msg_Dbg( p_demux, " integer control" );
+ msg_Dbg( p_demux,
+ " valid values: %d to %d by steps of %d",
+ queryctrl.minimum, queryctrl.maximum,
+ queryctrl.step );
+ msg_Dbg( p_demux, " default value: %d",
+ queryctrl.default_value );
+ break;
+ case V4L2_CTRL_TYPE_BOOLEAN:
+ msg_Dbg( p_demux, " boolean control" );
+ msg_Dbg( p_demux, " default value: %d",
+ queryctrl.default_value );
+ break;
+ case V4L2_CTRL_TYPE_MENU:
+ msg_Dbg( p_demux, " menu control" );
+ memset( &querymenu, 0, sizeof( querymenu ) );
+ for( querymenu.index = queryctrl.minimum;
+ querymenu.index <= (unsigned)queryctrl.maximum;
+ querymenu.index++ )
+ {
+ if( ioctl( i_fd, VIDIOC_QUERYMENU, &querymenu ) >= 0 )
+ {
+ msg_Dbg( p_demux, " %d: %s",
+ querymenu.index, querymenu.name );
+ }
+ }
+ msg_Dbg( p_demux, " default value: %d",
+ queryctrl.default_value );
+ break;
+ case V4L2_CTRL_TYPE_BUTTON:
+ msg_Dbg( p_demux, " button control" );
+ break;
+ default:
+ msg_Dbg( p_demux, " unknown control type (FIXME)" );
+ /* FIXME */
+ break;
+ }
+}
+
+static int VideoControlList( demux_t *p_demux, int i_fd )
+{
+ struct v4l2_queryctrl queryctrl;
+
+ memset( &queryctrl, 0, sizeof( queryctrl ) );
+
+ /* List public controls */
+ for( queryctrl.id = V4L2_CID_BASE;
+ queryctrl.id < V4L2_CID_LASTP1;
+ queryctrl.id ++ )
+ {
+ if( ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
+ {
+ if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
+ continue;
+ msg_Dbg( p_demux, "Available control: %s (%x)",
+ queryctrl.name, queryctrl.id );
+ VideoControlListPrint( p_demux, i_fd, queryctrl );
+ }
+ }
+
+ /* List private controls */
+ for( queryctrl.id = V4L2_CID_PRIVATE_BASE;
+ ;
+ queryctrl.id ++ )
+ {
+ if( ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
+ {
+ if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
+ continue;
+ msg_Dbg( p_demux, "Available private control: %s (%x)",
+ queryctrl.name, queryctrl.id );
+ VideoControlListPrint( p_demux, i_fd, queryctrl );
+ }
+ else
+ break;
+ }
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * Issue video controls
+ *****************************************************************************/
+static int VideoControl( demux_t *p_demux, int i_fd,
+ const char *psz_label, int i_cid, int i_value )
+{
+ struct v4l2_queryctrl queryctrl;
+ struct v4l2_control control;
+
+ if( i_value == -1 )
+ return VLC_SUCCESS;
+
+ memset( &queryctrl, 0, sizeof( queryctrl ) );
+
+ queryctrl.id = i_cid;
+
+ if( ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) < 0
+ || queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
+ {
+ msg_Err( p_demux, "%s (%x) control is not supported.", psz_label,
+ i_cid );
+ return VLC_EGENERIC;
+ }
+ if( !psz_label )
+ psz_label = (const char*)queryctrl.name;
+
+ memset( &control, 0, sizeof( control ) );
+ control.id = i_cid;
+
+ if( i_value >= 0 )
+ {
+ control.value = i_value;
+ if( ioctl( i_fd, VIDIOC_S_CTRL, &control ) < 0 )
+ {
+ msg_Err( p_demux, "unable to set %s to %d (%m)", psz_label,
+ i_value );
+ return VLC_EGENERIC;
+ }
+ }
+ if( ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0 )
+ {
+ msg_Dbg( p_demux, "video %s: %d", psz_label, control.value );
+ }
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * On the fly change settings callback
+ *****************************************************************************/
+static int VideoControlCallback( vlc_object_t *p_this,
+ const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
+ void *p_data )
+{
+ demux_t *p_demux = (demux_t*)p_this;
+ demux_sys_t *p_sys = p_demux->p_sys;
+
+ int i_fd = p_sys->i_fd_video;
+
+ if( i_fd < 0 )
+ return VLC_EGENERIC;
+
+ if( !strcmp( psz_var, "v4l2-brightness" ) )
+ {
+ p_sys->i_brightness = newval.i_int;
+ return VideoControl( p_demux, i_fd,
+ "brightness", V4L2_CID_BRIGHTNESS, p_sys->i_brightness );
+ }
+ else if( !strcmp( psz_var, "v4l2-contrast" ) )
+ {
+ p_sys->i_contrast = newval.i_int;
+ return VideoControl( p_demux, i_fd,
+ "contrast", V4L2_CID_CONTRAST, p_sys->i_contrast );
+ }
+ else if( !strcmp( psz_var, "v4l2-saturation" ) )
+ {
+ p_sys->i_saturation = newval.i_int;
+ return VideoControl( p_demux, i_fd,
+ "saturation", V4L2_CID_SATURATION, p_sys->i_saturation );
+ }
+ else if( !strcmp( psz_var, "v4l2-hue" ) )
+ {
+ p_sys->i_hue = newval.i_int;
+ return VideoControl( p_demux, i_fd,
+ "hue", V4L2_CID_HUE, p_sys->i_hue );
+ }
+ else if( !strcmp( psz_var, "v4l2-gamma" ) )
+ {
+ p_sys->i_gamma = newval.i_int;
+ return VideoControl( p_demux, i_fd,
+ "gamma", V4L2_CID_HUE, p_sys->i_gamma );
+ }
+ else if( !strcmp( psz_var, "videocontrol" ) )
+ {
+ char *psz_var = newval.psz_string;
+ int i_cid = strtol( psz_var, &psz_var, 16 );
+ int i_value = strtol( psz_var, &psz_var, 0 );
+ return VideoControl( p_demux, i_fd, NULL, i_cid, i_value );
+ }
+
+ return VLC_EGENERIC;
}
projects / vlc / blobdiff