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vlc/modules/access/v4l2.c

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/*****************************************************************************
* v4l2.c : Video4Linux2 input module for vlc
*****************************************************************************
* Copyright (C) 2002-2009 the VideoLAN team
* $Id$
*
* Authors: Benjamin Pracht <bigben at videolan dot org>
* Richard Hosking <richard at hovis dot net>
* Antoine Cellerier <dionoea at videolan d.t org>
* Dennis Lou <dlou99 at yahoo dot com>
*
* 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
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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.
*****************************************************************************/
/*
* Sections based on the reference V4L2 capture example at
* http://v4l2spec.bytesex.org/spec/capture-example.html
*/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_access.h>
#include <vlc_demux.h>
#include <vlc_input.h>
#include <vlc_vout.h>
#include <ctype.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.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
#include <poll.h>
#ifdef HAVE_LIBV4L2
# include <libv4l2.h>
#else
# define v4l2_close close
# define v4l2_dup dup
# define v4l2_ioctl ioctl
# define v4l2_read read
# define v4l2_mmap mmap
# define v4l2_munmap munmap
#endif
/*****************************************************************************
* Module descriptior
*****************************************************************************/
static int DemuxOpen ( vlc_object_t * );
static void DemuxClose( vlc_object_t * );
static int AccessOpen ( vlc_object_t * );
static void AccessClose( vlc_object_t * );
#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 or I422 for raw images, MJPG for M-JPEG compressed input) " \
"(Complete list: GREY, I240, RV16, RV15, RV24, RV32, YUY2, YUYV, UYVY, " \
"I41N, I422, I420, I411, I410, MJPG)")
#define INPUT_TEXT N_( "Input" )
#define INPUT_LONGTEXT N_( \
"Input of the card to use (see debug)." )
#define AUDIO_INPUT_TEXT N_( "Audio input" )
#define AUDIO_INPUT_LONGTEXT N_( \
"Audio input of the card to use (see debug)." )
#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, 0 for driver default)." )
#define HEIGHT_TEXT N_( "Height" )
#define HEIGHT_LONGTEXT N_( \
"Force height (-1 for autodetect, 0 for driver default)." )
#define FPS_TEXT N_( "Framerate" )
#define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
"(0 for autodetect)." )
#define CTRL_RESET_TEXT N_( "Reset v4l2 controls" )
#define CTRL_RESET_LONGTEXT N_( \
"Reset controls to defaults provided by the v4l2 driver." )
#define BRIGHTNESS_TEXT N_( "Brightness" )
#define BRIGHTNESS_LONGTEXT N_( \
"Brightness of the video input (if supported by the v4l2 driver)." )
#define CONTRAST_TEXT N_( "Contrast" )
#define CONTRAST_LONGTEXT N_( \
"Contrast of the video input (if supported by the v4l2 driver)." )
#define SATURATION_TEXT N_( "Saturation" )
#define SATURATION_LONGTEXT N_( \
"Saturation of the video input (if supported by the v4l2 driver)." )
#define HUE_TEXT N_( "Hue" )
#define HUE_LONGTEXT N_( \
"Hue of the video input (if supported by the v4l2 driver)." )
#define BLACKLEVEL_TEXT N_( "Black level" )
#define BLACKLEVEL_LONGTEXT N_( \
"Black level of the video input (if supported by the v4l2 driver)." )
#define AUTOWHITEBALANCE_TEXT N_( "Auto white balance" )
#define AUTOWHITEBALANCE_LONGTEXT N_( \
"Automatically set the white balance of the video input " \
"(if supported by the v4l2 driver)." )
#define DOWHITEBALANCE_TEXT N_( "Do white balance" )
#define DOWHITEBALANCE_LONGTEXT N_( \
"Trigger a white balancing action, useless if auto white balance is " \
"activated (if supported by the v4l2 driver)." )
#define REDBALANCE_TEXT N_( "Red balance" )
#define REDBALANCE_LONGTEXT N_( \
"Red balance of the video input (if supported by the v4l2 driver)." )
#define BLUEBALANCE_TEXT N_( "Blue balance" )
#define BLUEBALANCE_LONGTEXT N_( \
"Blue balance of the video input (if supported by the v4l2 driver)." )
#define GAMMA_TEXT N_( "Gamma" )
#define GAMMA_LONGTEXT N_( \
"Gamma of the video input (if supported by the v4l2 driver)." )
#define EXPOSURE_TEXT N_( "Exposure" )
#define EXPOSURE_LONGTEXT N_( \
"Exposure of the video input (if supported by the v4L2 driver)." )
#define AUTOGAIN_TEXT N_( "Auto gain" )
#define AUTOGAIN_LONGTEXT N_( \
"Automatically set the video input's gain (if supported by the " \
"v4l2 driver)." )
#define GAIN_TEXT N_( "Gain" )
#define GAIN_LONGTEXT N_( \
"Video input's gain (if supported by the v4l2 driver)." )
#define HFLIP_TEXT N_( "Horizontal flip" )
#define HFLIP_LONGTEXT N_( \
"Flip the video horizontally (if supported by the v4l2 driver)." )
#define VFLIP_TEXT N_( "Vertical flip" )
#define VFLIP_LONGTEXT N_( \
"Flip the video vertically (if supported by the v4l2 driver)." )
#define HCENTER_TEXT N_( "Horizontal centering" )
#define HCENTER_LONGTEXT N_( \
"Set the camera's horizontal centering (if supported by the v4l2 driver)." )
#define VCENTER_TEXT N_( "Vertical centering" )
#define VCENTER_LONGTEXT N_( \
"Set the camera's vertical centering (if supported by the v4l2 driver)." )
#define AUDIO_VOLUME_TEXT N_( "Volume" )
#define AUDIO_VOLUME_LONGTEXT N_( \
"Volume of the audio input (if supported by the v4l2 driver)." )
#define AUDIO_BALANCE_TEXT N_( "Balance" )
#define AUDIO_BALANCE_LONGTEXT N_( \
"Balance of the audio input (if supported by the v4l2 driver)." )
#define AUDIO_MUTE_TEXT N_( "Mute" )
#define AUDIO_MUTE_LONGTEXT N_( \
"Mute audio input (if supported by the v4l2 driver)." )
#define AUDIO_BASS_TEXT N_( "Bass" )
#define AUDIO_BASS_LONGTEXT N_( \
"Bass level of the audio input (if supported by the v4l2 driver)." )
#define AUDIO_TREBLE_TEXT N_( "Treble" )
#define AUDIO_TREBLE_LONGTEXT N_( \
"Treble level of the audio input (if supported by the v4l2 driver)." )
#define AUDIO_LOUDNESS_TEXT N_( "Loudness" )
#define AUDIO_LOUDNESS_LONGTEXT N_( \
"Loudness of the audio input (if supported by the v4l2 driver)." )
#define CACHING_TEXT N_("Caching value in ms")
#define CACHING_LONGTEXT N_( \
"Caching value for V4L2 captures. This " \
"value should be set in milliseconds." )
#define S_CTRLS_TEXT N_("v4l2 driver controls")
#define S_CTRLS_LONGTEXT N_( \
"Set the v4l2 driver controls to the values specified using a comma " \
"separated list optionally encapsulated by curly braces " \
"(e.g.: {video_bitrate=6000000,audio_crc=0,stream_type=3} ). " \
"To list available controls, increase verbosity (-vvv) " \
"or use the v4l2-ctl application." )
#define TUNER_TEXT N_("Tuner id")
#define TUNER_LONGTEXT N_( \
"Tuner id (see debug output)." )
#define FREQUENCY_TEXT N_("Frequency")
#define FREQUENCY_LONGTEXT N_( \
"Tuner frequency in Hz or kHz (see debug output)" )
#define TUNER_AUDIO_MODE_TEXT N_("Audio mode")
#define TUNER_AUDIO_MODE_LONGTEXT N_( \
"Tuner audio mono/stereo and track selection." )
#define AUDIO_DEPRECATED_ERROR N_( \
"Alsa or OSS audio capture in the v4l2 access is deprecated. " \
"please use 'v4l2:/""/ :input-slave=alsa:/""/' or " \
"'v4l2:/""/ :input-slave=oss:/""/' instead." )
typedef enum {
IO_METHOD_READ,
IO_METHOD_MMAP,
IO_METHOD_USERPTR,
} io_method;
static const int i_standards_list[] =
{ V4L2_STD_UNKNOWN, V4L2_STD_SECAM, V4L2_STD_PAL, V4L2_STD_NTSC };
static const char *const psz_standards_list_text[] =
{ N_("Default"), N_("SECAM"), N_("PAL"), N_("NTSC") };
static const int i_iomethod_list[] =
{ IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR };
static const char *const psz_iomethod_list_text[] =
{ N_("READ"), N_("MMAP"), N_("USERPTR") };
static const int i_tuner_audio_modes_list[] =
{ V4L2_TUNER_MODE_MONO, V4L2_TUNER_MODE_STEREO,
V4L2_TUNER_MODE_LANG1, V4L2_TUNER_MODE_LANG2,
V4L2_TUNER_MODE_SAP, V4L2_TUNER_MODE_LANG1_LANG2 };
static const char *const psz_tuner_audio_modes_list_text[] =
{ N_( "Mono" ),
N_( "Stereo" ),
N_( "Primary language (Analog TV tuners only)" ),
N_( "Secondary language (Analog TV tuners only)" ),
N_( "Second audio program (Analog TV tuners only)" ),
N_( "Primary language left, Secondary language right" ) };
#define V4L2_DEFAULT "/dev/video0"
#define CFG_PREFIX "v4l2-"
vlc_module_begin ()
set_shortname( N_("Video4Linux2") )
set_description( N_("Video4Linux2 input") )
set_category( CAT_INPUT )
set_subcategory( SUBCAT_INPUT_ACCESS )
set_section( N_( "Video input" ), NULL )
add_integer( CFG_PREFIX "standard", 0, NULL, STANDARD_TEXT,
STANDARD_LONGTEXT, false );
change_integer_list( i_standards_list, psz_standards_list_text, NULL );
add_string( CFG_PREFIX "chroma", NULL, NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
true );
add_integer( CFG_PREFIX "input", 0, NULL, INPUT_TEXT, INPUT_LONGTEXT,
true );
add_integer( CFG_PREFIX "audio-input", 0, NULL, AUDIO_INPUT_TEXT,
AUDIO_INPUT_LONGTEXT, true );
add_integer( CFG_PREFIX "io", IO_METHOD_MMAP, NULL, IOMETHOD_TEXT,
IOMETHOD_LONGTEXT, true );
change_integer_list( i_iomethod_list, psz_iomethod_list_text, NULL );
add_integer( CFG_PREFIX "width", -1, NULL, WIDTH_TEXT,
WIDTH_LONGTEXT, true );
add_integer( CFG_PREFIX "height", -1, NULL, HEIGHT_TEXT,
HEIGHT_LONGTEXT, true );
add_float( CFG_PREFIX "fps", 0, NULL, FPS_TEXT, FPS_LONGTEXT, true )
add_integer( CFG_PREFIX "caching", DEFAULT_PTS_DELAY / 1000, NULL,
CACHING_TEXT, CACHING_LONGTEXT, true );
set_section( N_( "Tuner" ), NULL )
add_integer( CFG_PREFIX "tuner", 0, NULL, TUNER_TEXT, TUNER_LONGTEXT,
true );
add_integer( CFG_PREFIX "tuner-frequency", -1, NULL, FREQUENCY_TEXT,
FREQUENCY_LONGTEXT, true );
add_integer( CFG_PREFIX "tuner-audio-mode", -1, NULL, TUNER_AUDIO_MODE_TEXT,
TUNER_AUDIO_MODE_LONGTEXT, true );
change_integer_list( i_tuner_audio_modes_list,
psz_tuner_audio_modes_list_text, 0 );
set_section( N_( "Controls" ),
N_( "v4l2 driver controls, if supported by your v4l2 driver." ) );
add_bool( CFG_PREFIX "controls-reset", false, NULL, CTRL_RESET_TEXT,
CTRL_RESET_LONGTEXT, true );
add_integer( CFG_PREFIX "brightness", -1, NULL, BRIGHTNESS_TEXT,
BRIGHTNESS_LONGTEXT, true );
add_integer( CFG_PREFIX "contrast", -1, NULL, CONTRAST_TEXT,
CONTRAST_LONGTEXT, true );
add_integer( CFG_PREFIX "saturation", -1, NULL, SATURATION_TEXT,
SATURATION_LONGTEXT, true );
add_integer( CFG_PREFIX "hue", -1, NULL, HUE_TEXT,
HUE_LONGTEXT, true );
add_integer( CFG_PREFIX "black-level", -1, NULL, BLACKLEVEL_TEXT,
BLACKLEVEL_LONGTEXT, true );
add_integer( CFG_PREFIX "auto-white-balance", -1, NULL,
AUTOWHITEBALANCE_TEXT, AUTOWHITEBALANCE_LONGTEXT, true );
add_integer( CFG_PREFIX "do-white-balance", -1, NULL, DOWHITEBALANCE_TEXT,
DOWHITEBALANCE_LONGTEXT, true );
add_integer( CFG_PREFIX "red-balance", -1, NULL, REDBALANCE_TEXT,
REDBALANCE_LONGTEXT, true );
add_integer( CFG_PREFIX "blue-balance", -1, NULL, BLUEBALANCE_TEXT,
BLUEBALANCE_LONGTEXT, true );
add_integer( CFG_PREFIX "gamma", -1, NULL, GAMMA_TEXT,
GAMMA_LONGTEXT, true );
add_integer( CFG_PREFIX "exposure", -1, NULL, EXPOSURE_TEXT,
EXPOSURE_LONGTEXT, true );
add_integer( CFG_PREFIX "autogain", -1, NULL, AUTOGAIN_TEXT,
AUTOGAIN_LONGTEXT, true );
add_integer( CFG_PREFIX "gain", -1, NULL, GAIN_TEXT,
GAIN_LONGTEXT, true );
add_integer( CFG_PREFIX "hflip", -1, NULL, HFLIP_TEXT,
HFLIP_LONGTEXT, true );
add_integer( CFG_PREFIX "vflip", -1, NULL, VFLIP_TEXT,
VFLIP_LONGTEXT, true );
add_integer( CFG_PREFIX "hcenter", -1, NULL, HCENTER_TEXT,
HCENTER_LONGTEXT, true );
add_integer( CFG_PREFIX "vcenter", -1, NULL, VCENTER_TEXT,
VCENTER_LONGTEXT, true );
add_integer( CFG_PREFIX "audio-volume", -1, NULL, AUDIO_VOLUME_TEXT,
AUDIO_VOLUME_LONGTEXT, true );
add_integer( CFG_PREFIX "audio-balance", -1, NULL, AUDIO_BALANCE_TEXT,
AUDIO_BALANCE_LONGTEXT, true );
add_bool( CFG_PREFIX "audio-mute", false, NULL, AUDIO_MUTE_TEXT,
AUDIO_MUTE_LONGTEXT, true );
add_integer( CFG_PREFIX "audio-bass", -1, NULL, AUDIO_BASS_TEXT,
AUDIO_BASS_LONGTEXT, true );
add_integer( CFG_PREFIX "audio-treble", -1, NULL, AUDIO_TREBLE_TEXT,
AUDIO_TREBLE_LONGTEXT, true );
add_integer( CFG_PREFIX "audio-loudness", -1, NULL, AUDIO_LOUDNESS_TEXT,
AUDIO_LOUDNESS_LONGTEXT, true );
add_string( CFG_PREFIX "set-ctrls", NULL, NULL, S_CTRLS_TEXT,
S_CTRLS_LONGTEXT, true );
add_obsolete_string( CFG_PREFIX "dev" );
add_obsolete_string( CFG_PREFIX "adev" );
add_obsolete_integer( CFG_PREFIX "audio-method" );
add_obsolete_bool( CFG_PREFIX "stereo" );
add_obsolete_integer( CFG_PREFIX "samplerate" );
add_shortcut( "v4l2" )
set_capability( "access_demux", 10 )
set_callbacks( DemuxOpen, DemuxClose )
add_submodule ()
add_shortcut( "v4l2c" )
set_description( N_("Video4Linux2 Compressed A/V") )
set_capability( "access", 0 )
/* use these when open as access_demux fails; VLC will use another demux */
set_callbacks( AccessOpen, AccessClose )
vlc_module_end ()
/*****************************************************************************
* Access: local prototypes
*****************************************************************************/
static void CommonClose( vlc_object_t *, demux_sys_t * );
static void ParseMRL( demux_sys_t *, char *, vlc_object_t * );
static void GetV4L2Params( demux_sys_t *, vlc_object_t * );
static void SetAvailControlsByString( vlc_object_t *, demux_sys_t *, int );
static int DemuxControl( demux_t *, int, va_list );
static int AccessControl( access_t *, int, va_list );
static int Demux( demux_t * );
static ssize_t AccessRead( access_t *, uint8_t *, size_t );
static block_t* GrabVideo( demux_t *p_demux );
static block_t* ProcessVideoFrame( demux_t *p_demux, uint8_t *p_frame, size_t );
static bool IsPixelFormatSupported( demux_t *p_demux,
unsigned int i_pixelformat );
static int OpenVideoDev( vlc_object_t *, demux_sys_t *, bool );
static bool ProbeVideoDev( vlc_object_t *, demux_sys_t *,
const char *psz_device );
static int ControlList( vlc_object_t *, int , bool, bool );
static int Control( vlc_object_t *, int i_fd,
const char *psz_name, int i_cid, int i_value );
static int DemuxControlCallback( vlc_object_t *p_this, const char *psz_var,
vlc_value_t oldval, vlc_value_t newval,
void *p_data );
static int DemuxControlResetCallback( vlc_object_t *p_this, const char *psz_var,
vlc_value_t oldval, vlc_value_t newval,
void *p_data );
static int AccessControlCallback( vlc_object_t *p_this, const char *psz_var,
vlc_value_t oldval, vlc_value_t newval,
void *p_data );
static int AccessControlResetCallback( vlc_object_t *p_this,
const char *psz_var, vlc_value_t oldval,
vlc_value_t newval, void *p_data );
static const struct
{
unsigned int i_v4l2;
int i_fourcc;
int i_rmask;
int i_gmask;
int i_bmask;
} v4l2chroma_to_fourcc[] =
{
/* Raw data types */
{ V4L2_PIX_FMT_GREY, VLC_FOURCC('G','R','E','Y'), 0, 0, 0 },
{ V4L2_PIX_FMT_HI240, VLC_FOURCC('I','2','4','0'), 0, 0, 0 },
{ V4L2_PIX_FMT_RGB555, VLC_FOURCC('R','V','1','5'), 0x001f,0x03e0,0x7c00 },
{ V4L2_PIX_FMT_RGB565, VLC_FOURCC('R','V','1','6'), 0x001f,0x07e0,0xf800 },
/* Won't work since we don't know how to handle such gmask values
* correctly
{ V4L2_PIX_FMT_RGB555X, VLC_FOURCC('R','V','1','5'), 0x007c,0xe003,0x1f00 },
{ V4L2_PIX_FMT_RGB565X, VLC_FOURCC('R','V','1','6'), 0x00f8,0xe007,0x1f00 },
*/
{ V4L2_PIX_FMT_BGR24, VLC_FOURCC('R','V','2','4'), 0xff0000,0xff00,0xff },
{ V4L2_PIX_FMT_RGB24, VLC_FOURCC('R','V','2','4'), 0xff,0xff00,0xff0000 },
{ V4L2_PIX_FMT_BGR32, VLC_FOURCC('R','V','3','2'), 0xff0000,0xff00,0xff },
{ V4L2_PIX_FMT_RGB32, VLC_FOURCC('R','V','3','2'), 0xff,0xff00,0xff0000 },
{ V4L2_PIX_FMT_YUYV, VLC_FOURCC('Y','U','Y','2'), 0, 0, 0 },
{ V4L2_PIX_FMT_YUYV, VLC_FOURCC('Y','U','Y','V'), 0, 0, 0 },
{ V4L2_PIX_FMT_UYVY, VLC_FOURCC('U','Y','V','Y'), 0, 0, 0 },
{ V4L2_PIX_FMT_Y41P, VLC_FOURCC('I','4','1','N'), 0, 0, 0 },
{ V4L2_PIX_FMT_YUV422P, VLC_FOURCC('I','4','2','2'), 0, 0, 0 },
{ V4L2_PIX_FMT_YVU420, VLC_FOURCC('Y','V','1','2'), 0, 0, 0 },
{ V4L2_PIX_FMT_YUV411P, VLC_FOURCC('I','4','1','1'), 0, 0, 0 },
{ V4L2_PIX_FMT_YUV410, VLC_FOURCC('I','4','1','0'), 0, 0, 0 },
/* Raw data types, not in V4L2 spec but still in videodev2.h and supported
* by VLC */
{ V4L2_PIX_FMT_YUV420, VLC_FOURCC('I','4','2','0'), 0, 0, 0 },
/* FIXME { V4L2_PIX_FMT_RGB444, VLC_FOURCC('R','V','3','2') }, */
/* Compressed data types */
{ V4L2_PIX_FMT_MJPEG, VLC_FOURCC('M','J','P','G'), 0, 0, 0 },
#if 0
{ V4L2_PIX_FMT_JPEG, VLC_FOURCC('J','P','E','G') },
{ V4L2_PIX_FMT_DV, VLC_FOURCC('?','?','?','?') },
{ V4L2_PIX_FMT_MPEG, VLC_FOURCC('?','?','?','?') },
#endif
{ 0, 0, 0, 0, 0 }
};
/**
* List of V4L2 chromas were confident enough to use as fallbacks if the
* user hasn't provided a --v4l2-chroma value.
*
* Try YUV chromas first, then RGB little endian and MJPEG as last resort.
*/
static const __u32 p_chroma_fallbacks[] =
{ V4L2_PIX_FMT_YUV420, V4L2_PIX_FMT_YVU420, V4L2_PIX_FMT_YUV422P,
V4L2_PIX_FMT_YUYV, V4L2_PIX_FMT_UYVY, V4L2_PIX_FMT_BGR24,
V4L2_PIX_FMT_BGR32, V4L2_PIX_FMT_MJPEG };
static const struct
{
const char *psz_name;
unsigned int i_cid;
} controls[] =
{
{ "brightness", V4L2_CID_BRIGHTNESS },
{ "contrast", V4L2_CID_CONTRAST },
{ "saturation", V4L2_CID_SATURATION },
{ "hue", V4L2_CID_HUE },
{ "audio-volume", V4L2_CID_AUDIO_VOLUME },
{ "audio-balance", V4L2_CID_AUDIO_BALANCE },
{ "audio-bass", V4L2_CID_AUDIO_BASS },
{ "audio-treble", V4L2_CID_AUDIO_TREBLE },
{ "audio-mute", V4L2_CID_AUDIO_MUTE },
{ "audio-loudness", V4L2_CID_AUDIO_LOUDNESS },
{ "black-level", V4L2_CID_BLACK_LEVEL },
{ "auto-white-balance", V4L2_CID_AUTO_WHITE_BALANCE },
{ "do-white-balance", V4L2_CID_DO_WHITE_BALANCE },
{ "red-balance", V4L2_CID_RED_BALANCE },
{ "blue-balance", V4L2_CID_BLUE_BALANCE },
{ "gamma", V4L2_CID_GAMMA },
{ "exposure", V4L2_CID_EXPOSURE },
{ "autogain", V4L2_CID_AUTOGAIN },
{ "gain", V4L2_CID_GAIN },
{ "hflip", V4L2_CID_HFLIP },
{ "vflip", V4L2_CID_VFLIP },
{ "hcenter", V4L2_CID_HCENTER },
{ "vcenter", V4L2_CID_VCENTER },
{ NULL, 0 }
};
struct buffer_t
{
void * start;
size_t length;
};
struct demux_sys_t
{
char *psz_device; /* Main device from MRL */
int i_fd;
char *psz_requested_chroma;
/* Video */
io_method io;
int i_cache;
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 */
struct v4l2_audio p_audios[32];
int i_selected_audio_input;
int i_tuner;
struct v4l2_tuner *p_tuners;
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;
es_out_id_t *p_es;
/* Tuner */
int i_cur_tuner;
int i_frequency;
int i_audio_mode;
/* Controls */
char *psz_set_ctrls;
};
static int FindMainDevice( vlc_object_t *p_this, demux_sys_t *p_sys,
bool b_demux )
{
/* TODO: if using default device, loop through all /dev/video* until
* one works */
msg_Dbg( p_this, "opening device '%s'", p_sys->psz_device );
if( ProbeVideoDev( p_this, p_sys, p_sys->psz_device ) )
{
msg_Dbg( p_this, "'%s' is a video device", p_sys->psz_device );
p_sys->i_fd = OpenVideoDev( p_this, p_sys, b_demux );
}
if( p_sys->i_fd < 0 ) return VLC_EGENERIC;
return VLC_SUCCESS;
}
/*****************************************************************************
* DemuxOpen: opens v4l2 device, access_demux callback
*****************************************************************************
*
* url: <video device>::::
*
*****************************************************************************/
static int DemuxOpen( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys;
/* Only when selected */
if( *p_demux->psz_access == '\0' ) return VLC_EGENERIC;
/* Set up p_demux */
p_demux->pf_control = DemuxControl;
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;
GetV4L2Params(p_sys, (vlc_object_t *) p_demux);
ParseMRL( p_sys, p_demux->psz_path, (vlc_object_t *) p_demux );
if( FindMainDevice( p_this, p_sys, true ) != VLC_SUCCESS)
{
DemuxClose( p_this );
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
/*****************************************************************************
* GetV4L2Params: fill in p_sys parameters (shared by DemuxOpen and AccessOpen)
*****************************************************************************/
static void GetV4L2Params( demux_sys_t *p_sys, vlc_object_t *p_obj )
{
p_sys->i_video_pts = -1;
p_sys->i_selected_standard_id =
i_standards_list[var_CreateGetInteger( p_obj, "v4l2-standard" )];
p_sys->i_selected_input = var_CreateGetInteger( p_obj, "v4l2-input" );
p_sys->i_selected_audio_input =
var_CreateGetInteger( p_obj, "v4l2-audio-input" );
p_sys->io = var_CreateGetInteger( p_obj, "v4l2-io" );
p_sys->i_width = var_CreateGetInteger( p_obj, "v4l2-width" );
p_sys->i_height = var_CreateGetInteger( p_obj, "v4l2-height" );
var_Create( p_obj, "v4l2-controls-reset", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
p_sys->f_fps = var_CreateGetFloat( p_obj, "v4l2-fps" );
p_sys->psz_requested_chroma = var_CreateGetString( p_obj, "v4l2-chroma" );
p_sys->i_cache = var_CreateGetInteger( p_obj, "v4l2-caching" );
p_sys->i_cur_tuner = var_CreateGetInteger( p_obj, "v4l2-tuner" );
p_sys->i_frequency = var_CreateGetInteger( p_obj, "v4l2-tuner-frequency" );
p_sys->i_audio_mode = var_CreateGetInteger( p_obj, "v4l2-tuner-audio-mode" );
p_sys->psz_set_ctrls = var_CreateGetString( p_obj, "v4l2-set-ctrls" );
p_sys->psz_device = NULL;
p_sys->i_fd = -1;
p_sys->p_es = NULL;
}
/*****************************************************************************
* ParseMRL: parse the options contained in the MRL
*****************************************************************************/
static void ParseMRL( demux_sys_t *p_sys, char *psz_path, vlc_object_t *p_obj )
{
char *psz_dup = strdup( 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, "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 );
}
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, "audio-input=", strlen( "audio-input=" ) ) )
{
p_sys->i_selected_audio_input = strtol( psz_parser + strlen( "audio-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, "controls-reset",
strlen( "controls-reset" ) ) )
{
var_SetBool( p_obj, "v4l2-controls-reset", true );
psz_parser += strlen( "controls-reset" );
}
#if 0
else if( !strncmp( psz_parser, "brightness=",
strlen( "brightness=" ) ) )
{
var_SetInteger( p_obj, "brightness",
strtol( psz_parser + strlen( "brightness=" ),
&psz_parser, 0 ) );
}
else if( !strncmp( psz_parser, "contrast=",
strlen( "contrast=" ) ) )
{
var_SetInteger( p_obj, "contrast",
strtol( psz_parser + strlen( "contrast=" ),
&psz_parser, 0 ) );
}
else if( !strncmp( psz_parser, "saturation=",
strlen( "saturation=" ) ) )
{
var_SetInteger( p_obj, "saturation",
strtol( psz_parser + strlen( "saturation=" ),
&psz_parser, 0 ) );
}
else if( !strncmp( psz_parser, "hue=",
strlen( "hue=" ) ) )
{
var_SetInteger( p_obj, "hue",
strtol( psz_parser + strlen( "hue=" ),
&psz_parser, 0 ) );
}
else if( !strncmp( psz_parser, "gamma=",
strlen( "gamma=" ) ) )
{
var_SetInteger( p_obj, "gamma",
strtol( psz_parser + strlen( "gamma=" ),
&psz_parser, 0 ) );
}
#endif
else if( !strncmp( psz_parser, "caching=", strlen( "caching=" ) ) )
{
p_sys->i_cache = strtol( psz_parser + strlen( "caching=" ),
&psz_parser, 0 );
}
else if( !strncmp( psz_parser, "tuner=", strlen( "tuner=" ) ) )
{
p_sys->i_cur_tuner = strtol( psz_parser + strlen( "tuner=" ),
&psz_parser, 0 );
}
else if( !strncmp( psz_parser, "tuner-frequency=", strlen( "tuner-frequency=" ) ) )
{
p_sys->i_frequency = strtol( psz_parser
+ strlen( "tuner-frequency=" ),
&psz_parser, 0 );
}
else if( !strncmp( psz_parser, "tuner-audio-mode=", strlen( "tuner-audio-mode=" ) ) )
{
p_sys->i_audio_mode = strtol( psz_parser
+ strlen( "tuner-audio-mode=" ),
&psz_parser, 0 );
}
else if( !strncmp( psz_parser, "set-ctrls=", strlen( "set-ctrls=" )) )
{
int i_len;
psz_parser += strlen( "set-ctrls=" );
if( strchr( psz_parser, ':' ) )
{
i_len = strchr( psz_parser, ':' ) - psz_parser;
}
else
{
i_len = strlen( psz_parser );
}
p_sys->psz_set_ctrls = strndup( psz_parser, i_len );
psz_parser += i_len;
}
else if( !strncmp( psz_parser, "adev=", strlen( "adev=" ) )
|| !strncmp( psz_parser, "samplerate=", strlen( "samplerate=" ) )
|| !strncmp( psz_parser, "audio-method", strlen( "audio-method" ) )
|| !strncmp( psz_parser, "stereo", strlen( "stereo" ) )
|| !strncmp( psz_parser, "mono", strlen( "mono" ) ) )
{
if( strchr( psz_parser, ':' ) )
{
psz_parser = strchr( psz_parser, ':' );
}
else
{
psz_parser += strlen( psz_parser );
}
msg_Err( p_obj, AUDIO_DEPRECATED_ERROR );
}
else
{
char *psz_unk = strchr( psz_parser, ':' );
if (psz_unk)
psz_unk = strndup( psz_parser, psz_unk - psz_parser );
else
psz_unk = strdup( psz_parser);
msg_Warn( p_obj, "unknown option %s", psz_unk );
free (psz_unk);
}
while( *psz_parser && *psz_parser != ':' )
{
psz_parser++;
}
if( *psz_parser == '\0' )
{
break;
}
}
}
/* Main device */
if( *psz_dup )
p_sys->psz_device = strdup( psz_dup );
else
p_sys->psz_device = strdup( V4L2_DEFAULT );
free( psz_dup );
}
/*****************************************************************************
* Close: close device, free resources
*****************************************************************************/
static void AccessClose( vlc_object_t *p_this )
{
access_t *p_access = (access_t *)p_this;
demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
CommonClose( p_this, p_sys );
}
static void DemuxClose( vlc_object_t *p_this )
{
struct v4l2_buffer buf;
enum v4l2_buf_type buf_type;
unsigned int i;
demux_t *p_demux = (demux_t *)p_this;
demux_sys_t *p_sys = p_demux->p_sys;
/* Stop video capture */
if( p_sys->i_fd >= 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;
v4l2_ioctl( p_sys->i_fd, VIDIOC_DQBUF, &buf ); /* ignore result */
}
buf_type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if( v4l2_ioctl( p_sys->i_fd, VIDIOC_STREAMOFF, &buf_type ) < 0 ) {
msg_Err( p_this, "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( v4l2_munmap( p_sys->p_buffers[i].start, p_sys->p_buffers[i].length ) )
{
msg_Err( p_this, "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 );
}
CommonClose( p_this, p_sys );
}
static void CommonClose( vlc_object_t *p_this, demux_sys_t *p_sys )
{
(void)p_this;
/* Close */
if( p_sys->i_fd >= 0 ) v4l2_close( p_sys->i_fd );
free( p_sys->psz_device );
free( p_sys->p_standards );
free( p_sys->p_inputs );
free( p_sys->p_tuners );
free( p_sys->p_codecs );
free( p_sys->psz_requested_chroma );
free( p_sys->psz_set_ctrls );
free( p_sys );
}
/*****************************************************************************
* AccessOpen: opens v4l2 device, access callback
*****************************************************************************
*
* url: <video device>::::
*
*****************************************************************************/
static int AccessOpen( vlc_object_t * p_this )
{
access_t *p_access = (access_t*) p_this;
demux_sys_t * p_sys;
/* Only when selected */
if( *p_access->psz_access == '\0' ) return VLC_EGENERIC;
p_access->pf_read = AccessRead;
p_access->pf_block = NULL;
p_access->pf_seek = NULL;
p_access->pf_control = AccessControl;
p_access->info.i_update = 0;
p_access->info.i_size = 0;
p_access->info.i_pos = 0;
p_access->info.b_eof = false;
p_access->info.i_title = 0;
p_access->info.i_seekpoint = 0;
p_sys = calloc( 1, sizeof( demux_sys_t ) );
p_access->p_sys = (access_sys_t *) p_sys;
if( p_sys == NULL ) return VLC_ENOMEM;
GetV4L2Params( p_sys, (vlc_object_t *) p_access );
ParseMRL( p_sys, p_access->psz_path, (vlc_object_t *) p_access );
if( FindMainDevice( p_this, p_sys, false ) != VLC_SUCCESS )
{
AccessClose( p_this );
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
/*****************************************************************************
* DemuxControl:
*****************************************************************************/
static int DemuxControl( demux_t *p_demux, int i_query, va_list args )
{
demux_sys_t *p_sys = p_demux->p_sys;
bool *pb;
int64_t *pi64;
switch( i_query )
{
/* Special for access_demux */
case DEMUX_CAN_PAUSE:
case DEMUX_CAN_SEEK:
case DEMUX_SET_PAUSE_STATE:
case DEMUX_CAN_CONTROL_PACE:
pb = (bool*)va_arg( args, bool * );
*pb = false;
return VLC_SUCCESS;
case DEMUX_GET_PTS_DELAY:
pi64 = (int64_t*)va_arg( args, int64_t * );
*pi64 = (int64_t)p_sys->i_cache * 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;
}
/*****************************************************************************
* AccessControl: access callback
*****************************************************************************/
static int AccessControl( access_t *p_access, int i_query, va_list args )
{
bool *pb_bool;
int *pi_int;
int64_t *pi_64;
demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
switch( i_query )
{
/* */
case ACCESS_CAN_SEEK:
case ACCESS_CAN_FASTSEEK:
pb_bool = (bool*)va_arg( args, bool* );
*pb_bool = false;
break;
case ACCESS_CAN_PAUSE:
pb_bool = (bool*)va_arg( args, bool* );
*pb_bool = false;
break;
case ACCESS_CAN_CONTROL_PACE:
pb_bool = (bool*)va_arg( args, bool* );
*pb_bool = false;
break;
/* */
case ACCESS_GET_MTU:
pi_int = (int*)va_arg( args, int * );
*pi_int = 0;
break;
case ACCESS_GET_PTS_DELAY:
pi_64 = (int64_t*)va_arg( args, int64_t * );
*pi_64 = (int64_t) p_sys->i_cache * 1000;
break;
/* */
case ACCESS_SET_PAUSE_STATE:
/* Nothing to do */
break;
case ACCESS_GET_TITLE_INFO:
case ACCESS_SET_TITLE:
case ACCESS_SET_SEEKPOINT:
case ACCESS_SET_PRIVATE_ID_STATE:
case ACCESS_GET_CONTENT_TYPE:
case ACCESS_GET_META:
return VLC_EGENERIC;
default:
msg_Warn( p_access, "Unimplemented query in control(%d).", i_query);
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
/*****************************************************************************
* AccessRead: access callback
******************************************************************************/
static ssize_t AccessRead( access_t * p_access, uint8_t * p_buffer, size_t i_len )
{
demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
struct pollfd ufd;
int i_ret;
ufd.fd = p_sys->i_fd;
ufd.events = POLLIN;
if( p_access->info.b_eof )
return 0;
do
{
if( !vlc_object_alive (p_access) )
return 0;
ufd.revents = 0;
}
while( ( i_ret = poll( &ufd, 1, 500 ) ) == 0 );
if( i_ret < 0 )
{
msg_Err( p_access, "Polling error (%m)." );
return -1;
}
i_ret = v4l2_read( p_sys->i_fd, p_buffer, i_len );
if( i_ret == 0 )
{
p_access->info.b_eof = true;
}
else if( i_ret > 0 )
{
p_access->info.i_pos += i_ret;
}
return i_ret;
}
/*****************************************************************************
* Demux: Processes the audio or video frame
*****************************************************************************/
static int Demux( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
struct pollfd fd;
fd.fd = p_sys->i_fd;
fd.events = POLLIN|POLLPRI;
fd.revents = 0;
/* Wait for data */
if( poll( &fd, 1, 500 ) ) /* Timeout after 0.5 seconds since I don't know if pf_demux can be blocking. */
{
if( fd.revents & (POLLIN|POLLPRI) )
{
block_t *p_block = GrabVideo( p_demux );
if( p_block )
{
es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
es_out_Send( p_demux->out, p_sys->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;
ssize_t i_ret;
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:
i_ret = v4l2_read( p_sys->i_fd, p_sys->p_buffers[0].start, p_sys->p_buffers[0].length );
if( i_ret == -1 )
{
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, i_ret );
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 (v4l2_ioctl( p_sys->i_fd, 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, buf.bytesused );
if( !p_block ) return 0;
/* Unlock */
if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
{
msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
block_Release( p_block );
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 (v4l2_ioctl( p_sys->i_fd, 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, buf.bytesused );
if( !p_block ) return 0;
/* Unlock */
if( v4l2_ioctl( p_sys->i_fd, VIDIOC_QBUF, &buf ) < 0 )
{
msg_Err( p_demux, "Failed to unlock (VIDIOC_QBUF)" );
block_Release( p_block );
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, size_t i_size )
{
block_t *p_block;
if( !p_frame ) return 0;
/* New block */
if( !( p_block = block_New( p_demux, i_size ) ) )
{
msg_Warn( p_demux, "Cannot get new block" );
return 0;
}
/* Copy frame */
memcpy( p_block->p_buffer, p_frame, i_size );
return p_block;
}
/*****************************************************************************
* Helper function to initalise video IO using the Read method
*****************************************************************************/
static int InitRead( demux_t *p_demux, 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 )
return VLC_EGENERIC;
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 )
return VLC_ENOMEM;
return VLC_SUCCESS;
}
/*****************************************************************************
* 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( v4l2_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 )
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( v4l2_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 =
v4l2_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 = sysconf(_SC_PAGESIZE);
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( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
{
msg_Err( p_demux, "device does not support user pointer i/o" );
return VLC_EGENERIC;
}
p_sys->p_buffers = calloc( 4, sizeof( *p_sys->p_buffers ) );
if( !p_sys->p_buffers )
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;
if( posix_memalign( &p_sys->p_buffers[p_sys->i_nbuffers].start,
/* boundary */ i_page_size, i_buffer_size ) )
goto open_failed;
}
return VLC_SUCCESS;
open_failed:
free( p_sys->p_buffers );
return VLC_EGENERIC;
}
/*****************************************************************************
* IsPixelFormatSupported: returns true if the specified V4L2 pixel format is
* in the array of supported formats returned by the driver
*****************************************************************************/
static bool 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 true;
}
return false;
}
static float GetMaxFrameRate( demux_t *p_demux, int i_fd,
uint32_t i_pixel_format,
uint32_t i_width, uint32_t i_height )
{
(void)p_demux;
#ifdef VIDIOC_ENUM_FRAMEINTERVALS
/* This is new in Linux 2.6.19 */
struct v4l2_frmivalenum frmival;
frmival.index = 0;
frmival.pixel_format = i_pixel_format;
frmival.width = i_width;
frmival.height = i_height;
if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
{
switch( frmival.type )
{
case V4L2_FRMIVAL_TYPE_DISCRETE:
{
float f_fps_max = -1;
do
{
float f_fps = (float)frmival.discrete.denominator
/ (float)frmival.discrete.numerator;
if( f_fps > f_fps_max ) f_fps_max = f_fps;
frmival.index++;
} while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS,
&frmival ) >= 0 );
return f_fps_max;
}
case V4L2_FRMSIZE_TYPE_STEPWISE:
case V4L2_FRMIVAL_TYPE_CONTINUOUS:
return __MAX( (float)frmival.stepwise.max.denominator
/ (float)frmival.stepwise.max.numerator,
(float)frmival.stepwise.min.denominator
/ (float)frmival.stepwise.min.numerator );
}
}
#endif
return -1.;
}
static float GetAbsoluteMaxFrameRate( demux_t *p_demux, int i_fd,
uint32_t i_pixel_format )
{
float f_fps_max = -1.;
#ifdef VIDIOC_ENUM_FRAMESIZES
/* This is new in Linux 2.6.19 */
struct v4l2_frmsizeenum frmsize;
frmsize.index = 0;
frmsize.pixel_format = i_pixel_format;
if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
{
switch( frmsize.type )
{
case V4L2_FRMSIZE_TYPE_DISCRETE:
do
{
frmsize.index++;
float f_fps = GetMaxFrameRate( p_demux, i_fd,
i_pixel_format,
frmsize.discrete.width,
frmsize.discrete.height );
if( f_fps > f_fps_max ) f_fps_max = f_fps;
} while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
&frmsize ) >= 0 );
break;
case V4L2_FRMSIZE_TYPE_STEPWISE:
{
uint32_t i_width = frmsize.stepwise.min_width;
uint32_t i_height = frmsize.stepwise.min_height;
for( ;
i_width <= frmsize.stepwise.max_width &&
i_height <= frmsize.stepwise.max_width;
i_width += frmsize.stepwise.step_width,
i_height += frmsize.stepwise.step_height )
{
float f_fps = GetMaxFrameRate( p_demux, i_fd,
i_pixel_format,
i_width, i_height );
if( f_fps > f_fps_max ) f_fps_max = f_fps;
}
break;
}
case V4L2_FRMSIZE_TYPE_CONTINUOUS:
/* FIXME */
msg_Err( p_demux, "GetAbsoluteMaxFrameRate implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
f_fps_max = GetMaxFrameRate( p_demux, i_fd,
i_pixel_format,
frmsize.stepwise.max_width,
frmsize.stepwise.max_height );
break;
}
}
#endif
return f_fps_max;
}
static void GetMaxDimensions( demux_t *p_demux, int i_fd,
uint32_t i_pixel_format, float f_fps_min,
uint32_t *pi_width, uint32_t *pi_height )
{
*pi_width = 0;
*pi_height = 0;
#ifdef VIDIOC_ENUM_FRAMESIZES
/* This is new in Linux 2.6.19 */
struct v4l2_frmsizeenum frmsize;
frmsize.index = 0;
frmsize.pixel_format = i_pixel_format;
if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 )
{
switch( frmsize.type )
{
case V4L2_FRMSIZE_TYPE_DISCRETE:
do
{
frmsize.index++;
float f_fps = GetMaxFrameRate( p_demux, i_fd,
i_pixel_format,
frmsize.discrete.width,
frmsize.discrete.height );
if( f_fps >= f_fps_min &&
frmsize.discrete.width > *pi_width )
{
*pi_width = frmsize.discrete.width;
*pi_height = frmsize.discrete.height;
}
} while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES,
&frmsize ) >= 0 );
break;
case V4L2_FRMSIZE_TYPE_STEPWISE:
{
uint32_t i_width = frmsize.stepwise.min_width;
uint32_t i_height = frmsize.stepwise.min_height;
for( ;
i_width <= frmsize.stepwise.max_width &&
i_height <= frmsize.stepwise.max_width;
i_width += frmsize.stepwise.step_width,
i_height += frmsize.stepwise.step_height )
{
float f_fps = GetMaxFrameRate( p_demux, i_fd,
i_pixel_format,
i_width, i_height );
if( f_fps >= f_fps_min && i_width > *pi_width )
{
*pi_width = i_width;
*pi_height = i_height;
}
}
break;
}
case V4L2_FRMSIZE_TYPE_CONTINUOUS:
/* FIXME */
msg_Err( p_demux, "GetMaxDimension implementation for V4L2_FRMSIZE_TYPE_CONTINUOUS isn't correct" );
float f_fps = GetMaxFrameRate( p_demux, i_fd,
i_pixel_format,
frmsize.stepwise.max_width,
frmsize.stepwise.max_height );
if( f_fps >= f_fps_min &&
frmsize.stepwise.max_width > *pi_width )
{
*pi_width = frmsize.stepwise.max_width;
*pi_height = frmsize.stepwise.max_height;
}
break;
}
}
#endif
}
/*****************************************************************************
* OpenVideoDev: open and set up the video device and probe for capabilities
*****************************************************************************/
static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
{
int i_fd;
struct v4l2_cropcap cropcap;
struct v4l2_crop crop;
struct v4l2_format fmt;
unsigned int i_min;
enum v4l2_buf_type buf_type;
const char *psz_device = p_sys->psz_device;
es_format_t es_fmt;
int libv4l2_fd;
if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
{
msg_Err( p_obj, "cannot open device (%m)" );
goto open_failed;
}
#ifdef HAVE_LIBV4L2
/* Note the v4l2_xxx functions are designed so that if they get passed an
unknown fd, the will behave exactly as their regular xxx counterparts,
so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
custom cam format to normal formats conversion). Chances are big we will
still fail then though, as normally v4l2_fd_open only fails if the
device is not a v4l2 device. */
libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
if( libv4l2_fd != -1 )
i_fd = libv4l2_fd;
#else
libv4l2_fd = i_fd;
#endif
/* Tune the tuner */
if( p_sys->i_frequency >= 0 )
{
if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
{
msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
goto open_failed;
}
struct v4l2_frequency frequency;
memset( &frequency, 0, sizeof( frequency ) );
frequency.tuner = p_sys->i_cur_tuner;
frequency.type = p_sys->p_tuners[p_sys->i_cur_tuner].type;
frequency.frequency = p_sys->i_frequency / 62.5;
if( v4l2_ioctl( i_fd, VIDIOC_S_FREQUENCY, &frequency ) < 0 )
{
msg_Err( p_obj, "cannot set tuner frequency (%m)" );
goto open_failed;
}
msg_Dbg( p_obj, "Tuner frequency set" );
}
/* Set the tuner's audio mode */
if( p_sys->i_audio_mode >= 0 )
{
if( p_sys->i_cur_tuner < 0 || p_sys->i_cur_tuner >= p_sys->i_tuner )
{
msg_Err( p_obj, "invalid tuner %d.", p_sys->i_cur_tuner );
goto open_failed;
}
struct v4l2_tuner tuner;
memset( &tuner, 0, sizeof( tuner ) );
tuner.index = p_sys->i_cur_tuner;
tuner.audmode = p_sys->i_audio_mode;
if( v4l2_ioctl( i_fd, VIDIOC_S_TUNER, &tuner ) < 0 )
{
msg_Err( p_obj, "cannot set tuner audio mode (%m)" );
goto open_failed;
}
msg_Dbg( p_obj, "Tuner audio mode set" );
}
/* Select standard */
if( p_sys->i_selected_standard_id != V4L2_STD_UNKNOWN )
{
if( v4l2_ioctl( i_fd, VIDIOC_S_STD, &p_sys->i_selected_standard_id ) < 0 )
{
msg_Err( p_obj, "cannot set standard (%m)" );
goto open_failed;
}
msg_Dbg( p_obj, "Set standard" );
}
/* Select input */
if( p_sys->i_selected_input >= p_sys->i_input )
{
msg_Warn( p_obj, "invalid input. Using the default one" );
p_sys->i_selected_input = 0;
}
if( v4l2_ioctl( i_fd, VIDIOC_S_INPUT, &p_sys->i_selected_input ) < 0 )
{
msg_Err( p_obj, "cannot set input (%m)" );
goto open_failed;
}
/* Set audio input */
if( p_sys->i_audio > 0 )
{
if( p_sys->i_selected_audio_input < 0
|| p_sys->i_selected_audio_input >= p_sys->i_audio )
{
msg_Warn( p_obj, "invalid audio input. Using the default one" );
p_sys->i_selected_audio_input = 0;
}
if( v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_selected_audio_input] ) < 0 )
{
msg_Err( p_obj, "cannot set audio input (%m)" );
goto open_failed;
}
msg_Dbg( p_obj, "Audio input set to %d", p_sys->i_selected_audio_input );
}
/* TODO: Move the resolution stuff up here */
/* if MPEG encoder card, no need to do anything else after this */
ControlList( p_obj, i_fd,
var_GetBool( p_obj, "v4l2-controls-reset" ), b_demux );
SetAvailControlsByString( p_obj, p_sys, i_fd );
if( false == b_demux)
{
return i_fd;
}
demux_t *p_demux = (demux_t *) p_obj;
/* 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( v4l2_ioctl( i_fd, VIDIOC_CROPCAP, &cropcap ) >= 0 )
{
crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
crop.c = cropcap.defrect; /* reset to default */
if( v4l2_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 )
{
/* Use current width and height settings */
if( v4l2_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 if( p_sys->i_width < 0 || p_sys->i_height < 0 )
{
msg_Dbg( p_demux, "will try to find optimal width and height." );
}
else
{
/* Use user specified width and height */
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 && v4l2_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 */
/* This also decides if MPEG encoder card or not */
if( !fmt.fmt.pix.pixelformat )
{
unsigned int i;
for( i = 0; i < ARRAY_SIZE( p_chroma_fallbacks ); i++ )
{
fmt.fmt.pix.pixelformat = p_chroma_fallbacks[i];
if( IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat )
&& v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
break;
}
if( i == ARRAY_SIZE( p_chroma_fallbacks ) )
{
msg_Warn( p_demux, "Could not select any of the default chromas; attempting to open as MPEG encoder card (access)" );
goto open_failed;
}
}
if( p_sys->i_width < 0 || p_sys->i_height < 0 )
{
if( p_sys->f_fps <= 0 )
{
p_sys->f_fps = GetAbsoluteMaxFrameRate( p_demux, i_fd,
fmt.fmt.pix.pixelformat );
msg_Dbg( p_demux, "Found maximum framerate of %f", p_sys->f_fps );
}
GetMaxDimensions( p_demux, i_fd,
fmt.fmt.pix.pixelformat, p_sys->f_fps,
&fmt.fmt.pix.width, &fmt.fmt.pix.height );
msg_Dbg( p_demux, "Found optimal dimensions for framerate %f of %dx%d",
p_sys->f_fps, fmt.fmt.pix.width, fmt.fmt.pix.height );
if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 ) {;}
}
/* 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;
es_format_Init( &es_fmt, VIDEO_ES, p_sys->i_fourcc );
es_fmt.video.i_rmask = v4l2chroma_to_fourcc[i].i_rmask;
es_fmt.video.i_gmask = v4l2chroma_to_fourcc[i].i_gmask;
es_fmt.video.i_bmask = v4l2chroma_to_fourcc[i].i_bmask;
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( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMEINTERVALS, &frmival ) >= 0 )
{
char psz_fourcc[5];
memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
vlc_fourcc_to_char( p_sys->i_fourcc, &psz_fourcc );
msg_Dbg( p_demux, "supported frame intervals for %4s, %dx%d:",
psz_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( v4l2_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
/* Init IO method */
switch( p_sys->io )
{
case IO_METHOD_READ:
if( InitRead( p_demux, 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_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;
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 = 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( v4l2_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( v4l2_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( v4l2_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( v4l2_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 >= 0 ) v4l2_close( i_fd );
return -1;
}
/*****************************************************************************
* ProbeVideoDev: probe video for capabilities
*****************************************************************************/
static bool ProbeVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys,
const char *psz_device )
{
int i_index;
int i_standard;
int i_fd;
int libv4l2_fd;
if( ( i_fd = open( psz_device, O_RDWR ) ) < 0 )
{
msg_Err( p_obj, "cannot open video device '%s' (%m)", psz_device );
goto open_failed;
}
#ifdef HAVE_LIBV4L2
/* Note the v4l2_xxx functions are designed so that if they get passed an
unknown fd, the will behave exactly as their regular xxx counterparts,
so if v4l2_fd_open fails, we continue as normal (missing the libv4l2
custom cam format to normal formats conversion). Chances are big we will
still fail then though, as normally v4l2_fd_open only fails if the
device is not a v4l2 device. */
libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
if( libv4l2_fd != -1 )
i_fd = libv4l2_fd;
#else
libv4l2_fd = i_fd;
#endif
/* Get device capabilites */
if( v4l2_ioctl( i_fd, VIDIOC_QUERYCAP, &p_sys->dev_cap ) < 0 )
{
msg_Err( p_obj, "cannot get video capabilities (%m)" );
goto open_failed;
}
msg_Dbg( p_obj, "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->dev_cap.version >> 8) & 0xFF,
p_sys->dev_cap.version & 0xFF,
p_sys->dev_cap.bus_info );
msg_Dbg( p_obj, "the device has the capabilities: (%c) Video Capure, "
"(%c) Audio, "
"(%c) Tuner",
( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE ? 'X':' '),
( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO ? 'X':' '),
( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER ? 'X':' ') );
msg_Dbg( p_obj, "supported I/O methods are: (%c) Read/Write, "
"(%c) Streaming, "
"(%c) Asynchronous",
( p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE ? 'X':' ' ),
( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING ? 'X':' ' ),
( p_sys->dev_cap.capabilities & V4L2_CAP_ASYNCIO ? 'X':' ' ) );
/* Now, enumerate all the video inputs. This is useless at the moment
since we have no way to present that info to the user except with
debug messages */
if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
{
struct v4l2_input t_input;
t_input.index = 0;
while( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &t_input ) >= 0 )
{
p_sys->i_input++;
t_input.index = p_sys->i_input;
}
p_sys->p_inputs = calloc( 1, p_sys->i_input * sizeof( struct v4l2_input ) );
if( !p_sys->p_inputs ) goto open_failed;
for( i_index = 0; i_index < p_sys->i_input; i_index++ )
{
p_sys->p_inputs[i_index].index = i_index;
if( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &p_sys->p_inputs[i_index] ) )
{
msg_Err( p_obj, "cannot get video input characteristics (%m)" );
goto open_failed;
}
msg_Dbg( p_obj, "video input %i (%s) has type: %s %c",
i_index,
p_sys->p_inputs[i_index].name,
p_sys->p_inputs[i_index].type
== V4L2_INPUT_TYPE_TUNER ?
"Tuner adapter" :
"External analog input",
i_index == p_sys->i_selected_input ? '*' : ' ' );
}
}
/* Probe video standards */
if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
{
struct v4l2_standard t_standards;
t_standards.index = 0;
while( v4l2_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( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &p_sys->p_standards[i_standard] ) )
{
msg_Err( p_obj, "cannot get video input standards (%m)" );
goto open_failed;
}
msg_Dbg( p_obj, "video standard %i is: %s %c",
i_standard,
p_sys->p_standards[i_standard].name,
(unsigned)i_standard == p_sys->i_selected_standard_id ? '*' : ' ' );
}
}
/* initialize the structures for the ioctls */
for( i_index = 0; i_index < 32; i_index++ )
{
p_sys->p_audios[i_index].index = i_index;
}
/* Probe audio inputs */
if( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO )
{
while( p_sys->i_audio < 32 &&
v4l2_ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_audio] ) >= 0 )
{
if( v4l2_ioctl( i_fd, VIDIOC_G_AUDIO, &p_sys->p_audios[ p_sys->i_audio] ) < 0 )
{
msg_Err( p_obj, "cannot get audio input characteristics (%m)" );
goto open_failed;
}
msg_Dbg( p_obj, "audio input %i (%s) is %s %s %c",
p_sys->i_audio,
p_sys->p_audios[p_sys->i_audio].name,
p_sys->p_audios[p_sys->i_audio].capability &
V4L2_AUDCAP_STEREO ?
"Stereo" : "Mono",
p_sys->p_audios[p_sys->i_audio].capability &
V4L2_AUDCAP_AVL ?
"(Automatic Volume Level supported)" : "",
p_sys->i_audio == p_sys->i_selected_audio_input ? '*' : ' ' );
p_sys->i_audio++;
}
}
/* List tuner caps */
if( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER )
{
struct v4l2_tuner tuner;
memset( &tuner, 0, sizeof(tuner) );
while( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &tuner ) >= 0 )
{
p_sys->i_tuner++;
memset( &tuner, 0, sizeof(tuner) );
tuner.index = p_sys->i_tuner;
}
p_sys->p_tuners = calloc( 1, p_sys->i_tuner * sizeof( struct v4l2_tuner ) );
if( !p_sys->p_tuners ) goto open_failed;
for( i_index = 0; i_index < p_sys->i_tuner; i_index++ )
{
p_sys->p_tuners[i_index].index = i_index;
if( v4l2_ioctl( i_fd, VIDIOC_G_TUNER, &p_sys->p_tuners[i_index] ) )
{
msg_Err( p_obj, "cannot get tuner characteristics (%m)" );
goto open_failed;
}
msg_Dbg( p_obj, "tuner %i (%s) has type: %s, "
"frequency range: %.1f %s -> %.1f %s",
i_index,
p_sys->p_tuners[i_index].name,
p_sys->p_tuners[i_index].type
== V4L2_TUNER_RADIO ?
"Radio" : "Analog TV",
p_sys->p_tuners[i_index].rangelow * 62.5,
p_sys->p_tuners[i_index].capability &
V4L2_TUNER_CAP_LOW ?
"Hz" : "kHz",
p_sys->p_tuners[i_index].rangehigh * 62.5,
p_sys->p_tuners[i_index].capability &
V4L2_TUNER_CAP_LOW ?
"Hz" : "kHz" );
struct v4l2_frequency frequency;
memset( &frequency, 0, sizeof( frequency ) );
if( v4l2_ioctl( i_fd, VIDIOC_G_FREQUENCY, &frequency ) < 0 )
{
msg_Err( p_obj, "cannot get tuner frequency (%m)" );
goto open_failed;
}
msg_Dbg( p_obj, "tuner %i (%s) frequency: %.1f %s",
i_index,
p_sys->p_tuners[i_index].name,
frequency.frequency * 62.5,
p_sys->p_tuners[i_index].capability &
V4L2_TUNER_CAP_LOW ?
"Hz" : "kHz" );
}
}
/* Probe for available chromas */
if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
{
struct v4l2_fmtdesc codec;
i_index = 0;
memset( &codec, 0, sizeof(codec) );
codec.index = i_index;
codec.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &codec ) >= 0 )
{
i_index++;
codec.index = i_index;
}
p_sys->i_codec = i_index;
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++ )
{
p_sys->p_codecs[i_index].index = i_index;
p_sys->p_codecs[i_index].type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
if( v4l2_ioctl( i_fd, VIDIOC_ENUM_FMT, &p_sys->p_codecs[i_index] ) < 0 )
{
msg_Err( p_obj, "cannot get codec description (%m)" );
goto open_failed;
}
/* only print if vlc supports the format */
char psz_fourcc_v4l2[5];
memset( &psz_fourcc_v4l2, 0, sizeof( psz_fourcc_v4l2 ) );
vlc_fourcc_to_char( p_sys->p_codecs[i_index].pixelformat,
&psz_fourcc_v4l2 );
bool b_codec_supported = 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 = true;
char psz_fourcc[5];
memset( &psz_fourcc, 0, sizeof( psz_fourcc ) );
vlc_fourcc_to_char( v4l2chroma_to_fourcc[i].i_fourcc,
&psz_fourcc );
msg_Dbg( p_obj, "device supports chroma %4s [%s, %s]",
psz_fourcc,
p_sys->p_codecs[i_index].description,
psz_fourcc_v4l2 );
#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( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) < 0 )
{
/* Not all devices support this ioctl */
msg_Warn( p_obj, "Unable to query for frame sizes" );
}
else
{
switch( frmsize.type )
{
case V4L2_FRMSIZE_TYPE_DISCRETE:
do
{
msg_Dbg( p_obj,
" device supports size %dx%d",
frmsize.discrete.width, frmsize.discrete.height );
frmsize.index++;
} while( v4l2_ioctl( i_fd, VIDIOC_ENUM_FRAMESIZES, &frmsize ) >= 0 );
break;
case V4L2_FRMSIZE_TYPE_STEPWISE:
msg_Dbg( p_obj,
" 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_obj,
" 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_obj,
"device codec %4s (%s) not supported",
psz_fourcc_v4l2,
p_sys->p_codecs[i_index].description );
}
}
}
if( i_fd >= 0 ) v4l2_close( i_fd );
return true;
open_failed:
if( i_fd >= 0 ) v4l2_close( i_fd );
return false;
}
static void name2var( unsigned char *name )
{
for( ; *name; name++ )
*name = (*name == ' ') ? '_' : tolower( *name );
}
/*****************************************************************************
* Print a user-class v4l2 control's details, create the relevant variable,
* change the value if needed.
*****************************************************************************/
static void ControlListPrint( vlc_object_t *p_obj, int i_fd,
struct v4l2_queryctrl queryctrl,
bool b_reset, bool b_demux )
{
struct v4l2_querymenu querymenu;
unsigned int i_mid;
int i;
int i_val;
char *psz_name;
vlc_value_t val, val2;
if( queryctrl.flags & V4L2_CTRL_FLAG_GRABBED )
msg_Dbg( p_obj, " control is busy" );
if( queryctrl.flags & V4L2_CTRL_FLAG_READ_ONLY )
msg_Dbg( p_obj, " control is read-only" );
for( i = 0; controls[i].psz_name != NULL; i++ )
if( controls[i].i_cid == queryctrl.id ) break;
if( controls[i].psz_name )
{
psz_name = strdup( controls[i].psz_name );
char psz_cfg_name[40];
sprintf( psz_cfg_name, CFG_PREFIX "%s", psz_name );
i_val = var_CreateGetInteger( p_obj, psz_cfg_name );
var_Destroy( p_obj, psz_cfg_name );
}
else
{
psz_name = strdup( (const char *)queryctrl.name );
name2var( (unsigned char *)psz_name );
i_val = -1;
}
switch( queryctrl.type )
{
case V4L2_CTRL_TYPE_INTEGER:
msg_Dbg( p_obj, " integer control" );
msg_Dbg( p_obj,
" valid values: %d to %d by steps of %d",
queryctrl.minimum, queryctrl.maximum,
queryctrl.step );
var_Create( p_obj, psz_name,
VLC_VAR_INTEGER | VLC_VAR_HASMIN | VLC_VAR_HASMAX
| VLC_VAR_HASSTEP | VLC_VAR_ISCOMMAND );
val.i_int = queryctrl.minimum;
var_Change( p_obj, psz_name, VLC_VAR_SETMIN, &val, NULL );
val.i_int = queryctrl.maximum;
var_Change( p_obj, psz_name, VLC_VAR_SETMAX, &val, NULL );
val.i_int = queryctrl.step;
var_Change( p_obj, psz_name, VLC_VAR_SETSTEP, &val, NULL );
break;
case V4L2_CTRL_TYPE_BOOLEAN:
msg_Dbg( p_obj, " boolean control" );
var_Create( p_obj, psz_name,
VLC_VAR_BOOL | VLC_VAR_ISCOMMAND );
break;
case V4L2_CTRL_TYPE_MENU:
msg_Dbg( p_obj, " menu control" );
var_Create( p_obj, psz_name,
VLC_VAR_INTEGER | VLC_VAR_HASCHOICE
| VLC_VAR_ISCOMMAND );
memset( &querymenu, 0, sizeof( querymenu ) );
for( i_mid = queryctrl.minimum;
i_mid <= (unsigned)queryctrl.maximum;
i_mid++ )
{
querymenu.index = i_mid;
querymenu.id = queryctrl.id;
if( v4l2_ioctl( i_fd, VIDIOC_QUERYMENU, &querymenu ) >= 0 )
{
msg_Dbg( p_obj, " %d: %s",
querymenu.index, querymenu.name );
val.i_int = querymenu.index;
val2.psz_string = (char *)querymenu.name;
var_Change( p_obj, psz_name,
VLC_VAR_ADDCHOICE, &val, &val2 );
}
}
break;
case V4L2_CTRL_TYPE_BUTTON:
msg_Dbg( p_obj, " button control" );
var_Create( p_obj, psz_name,
VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
break;
case V4L2_CTRL_TYPE_CTRL_CLASS:
msg_Dbg( p_obj, " control class" );
var_Create( p_obj, psz_name, VLC_VAR_VOID );
break;
default:
msg_Dbg( p_obj, " unknown control type (FIXME)" );
/* FIXME */
break;
}
switch( queryctrl.type )
{
case V4L2_CTRL_TYPE_INTEGER:
case V4L2_CTRL_TYPE_BOOLEAN:
case V4L2_CTRL_TYPE_MENU:
{
struct v4l2_control control;
msg_Dbg( p_obj, " default value: %d",
queryctrl.default_value );
memset( &control, 0, sizeof( control ) );
control.id = queryctrl.id;
if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0 )
{
msg_Dbg( p_obj, " current value: %d", control.value );
}
if( i_val == -1 )
{
i_val = control.value;
if( b_reset && queryctrl.default_value != control.value )
{
msg_Dbg( p_obj, " reset value to default" );
Control( p_obj, i_fd, psz_name,
queryctrl.id, queryctrl.default_value );
}
}
else
{
Control( p_obj, i_fd, psz_name,
queryctrl.id, i_val );
}
}
break;
default:
break;
}
val.psz_string = (char *)queryctrl.name;
var_Change( p_obj, psz_name, VLC_VAR_SETTEXT, &val, NULL );
val.i_int = queryctrl.id;
val2.psz_string = (char *)psz_name;
var_Change( p_obj, "allcontrols", VLC_VAR_ADDCHOICE, &val, &val2 );
/* bad things happen changing MPEG mid-stream
* so don't add to Ext Settings GUI */
if( V4L2_CTRL_ID2CLASS( queryctrl.id ) != V4L2_CTRL_CLASS_MPEG )
var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
{
case VLC_VAR_BOOL:
var_SetBool( p_obj, psz_name, i_val );
break;
case VLC_VAR_INTEGER:
var_SetInteger( p_obj, psz_name, i_val );
break;
case VLC_VAR_VOID:
break;
default:
msg_Warn( p_obj, "FIXME: %s %s %d", __FILE__, __func__,
__LINE__ );
break;
}
if( b_demux )
var_AddCallback( p_obj, psz_name,
DemuxControlCallback, (void*)(intptr_t)queryctrl.id );
else
var_AddCallback( p_obj, psz_name,
AccessControlCallback, (void*)(intptr_t)queryctrl.id );
free( psz_name );
}
/*****************************************************************************
* List all user-class v4l2 controls, set them to the user specified
* value and create the relevant variables to enable runtime changes
*****************************************************************************/
static int ControlList( vlc_object_t *p_obj, int i_fd,
bool b_reset, bool b_demux )
{
struct v4l2_queryctrl queryctrl;
int i_cid;
memset( &queryctrl, 0, sizeof( queryctrl ) );
/* A list of available controls (aka the variable name) will be
* stored as choices in the "allcontrols" variable. We'll thus be able
* to use those to create an appropriate interface
* A list of available controls that can be changed mid-stream will
* be stored in the "controls" variable */
var_Create( p_obj, "controls", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
var_Create( p_obj, "allcontrols", VLC_VAR_INTEGER | VLC_VAR_HASCHOICE );
var_Create( p_obj, "controls-update", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
/* Add a control to reset all controls to their default values */
vlc_value_t val, val2;
var_Create( p_obj, "controls-reset", VLC_VAR_VOID | VLC_VAR_ISCOMMAND );
val.psz_string = _( "Reset controls to default" );
var_Change( p_obj, "controls-reset", VLC_VAR_SETTEXT, &val, NULL );
val.i_int = -1;
val2.psz_string = (char *)"controls-reset";
var_Change( p_obj, "controls", VLC_VAR_ADDCHOICE, &val, &val2 );
if (b_demux)
var_AddCallback( p_obj, "controls-reset", DemuxControlResetCallback, NULL );
else
var_AddCallback( p_obj, "controls-reset", AccessControlResetCallback, NULL );
queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
{
msg_Dbg( p_obj, "Extended control API supported by v4l2 driver" );
/* List extended controls */
queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
{
if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS )
{
msg_Dbg( p_obj, "%s", queryctrl.name );
queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
continue;
}
switch( V4L2_CTRL_ID2CLASS( queryctrl.id ) )
{
case V4L2_CTRL_CLASS_USER:
msg_Dbg( p_obj, "Available control: %s (%x)",
queryctrl.name, queryctrl.id );
break;
case V4L2_CTRL_CLASS_MPEG:
name2var( queryctrl.name );
msg_Dbg( p_obj, "Available MPEG control: %s (%x)",
queryctrl.name, queryctrl.id );
break;
default:
msg_Dbg( p_obj, "Available private control: %s (%x)",
queryctrl.name, queryctrl.id );
break;
}
ControlListPrint( p_obj, i_fd, queryctrl, b_reset, b_demux );
queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
}
}
else
{
msg_Dbg( p_obj, "Extended control API not supported by v4l2 driver" );
/* List public controls */
for( i_cid = V4L2_CID_BASE;
i_cid < V4L2_CID_LASTP1;
i_cid ++ )
{
queryctrl.id = i_cid;
if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
{
if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
continue;
msg_Dbg( p_obj, "Available control: %s (%x)",
queryctrl.name, queryctrl.id );
ControlListPrint( p_obj, i_fd, queryctrl, b_reset, b_demux );
}
}
/* List private controls */
for( i_cid = V4L2_CID_PRIVATE_BASE;
;
i_cid ++ )
{
queryctrl.id = i_cid;
if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
{
if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
continue;
msg_Dbg( p_obj, "Available private control: %s (%x)",
queryctrl.name, queryctrl.id );
ControlListPrint( p_obj, i_fd, queryctrl, b_reset, b_demux );
}
else
break;
}
}
return VLC_SUCCESS;
}
static void SetAvailControlsByString( vlc_object_t *p_obj, demux_sys_t *p_sys,
int i_fd )
{
char *psz_parser = p_sys->psz_set_ctrls;
vlc_value_t val, text, name;
if( psz_parser == NULL )
return;
if( *psz_parser == '{' )
psz_parser++;
int i_ret = var_Change( p_obj, "allcontrols", VLC_VAR_GETCHOICES,
&val, &text );
if( i_ret < 0 )
{
msg_Err( p_obj, "Oops, can't find 'allcontrols' variable." );
return;
}
while( *psz_parser && *psz_parser != '}' )
{
char *psz_delim, *psz_assign;
while( *psz_parser == ',' || *psz_parser == ' ' )
psz_parser++;
psz_delim = strchr( psz_parser, ',' );
if( psz_delim == NULL )
psz_delim = strchr( psz_parser, '}' );
if( psz_delim == NULL )
psz_delim = psz_parser + strlen( psz_parser );
psz_assign = memchr( psz_parser, '=', psz_delim - psz_parser );
if( psz_assign == NULL )
{
char *psz_name = strndup( psz_parser, psz_delim - psz_parser );
msg_Err( p_obj, "%s missing '='", psz_name );
free( psz_name );
psz_parser = psz_delim + 1;
continue;
}
for( int i = 0;
i < val.p_list->i_count ;//&& psz_parser < psz_assign;
i++ )
{
const char *psz_var = text.p_list->p_values[i].psz_string;
int i_cid = val.p_list->p_values[i].i_int;
var_Change( p_obj, psz_var, VLC_VAR_GETTEXT, &name, NULL );
const char *psz_name = name.psz_string;
int i_availstrlen = strlen( psz_name );
int i_parsestrlen = psz_assign - psz_parser;
int i_maxstrlen = __MAX( i_availstrlen, i_parsestrlen);
if( !strncasecmp( psz_name, psz_parser, i_maxstrlen ) )
{
Control( p_obj, i_fd, psz_name, i_cid,
strtol( ++psz_assign, &psz_parser, 0) );
}
}
if( psz_parser < psz_assign )
{
char *psz_name = strndup( psz_parser, psz_assign - psz_parser );
msg_Err( p_obj, "Control %s not available", psz_name );
free( psz_name );
psz_parser = ( *psz_delim ) ? ( psz_delim + 1 ) : psz_delim;
}
}
}
/*****************************************************************************
* Reset all user-class v4l2 controls to their default value
*****************************************************************************/
static int ControlReset( vlc_object_t *p_obj, int i_fd )
{
struct v4l2_queryctrl queryctrl;
int i_cid;
memset( &queryctrl, 0, sizeof( queryctrl ) );
queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
{
/* Extended control API supported */
queryctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
while( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
{
if( queryctrl.type == V4L2_CTRL_TYPE_CTRL_CLASS
|| V4L2_CTRL_ID2CLASS( queryctrl.id ) == V4L2_CTRL_CLASS_MPEG )
{
queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
continue;
}
struct v4l2_control control;
memset( &control, 0, sizeof( control ) );
control.id = queryctrl.id;
if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
&& queryctrl.default_value != control.value )
{
int i;
for( i = 0; controls[i].psz_name != NULL; i++ )
if( controls[i].i_cid == queryctrl.id ) break;
name2var( queryctrl.name );
Control( p_obj, i_fd,
controls[i].psz_name ? : (const char *)queryctrl.name,
queryctrl.id, queryctrl.default_value );
}
queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
}
}
else
{
/* public controls */
for( i_cid = V4L2_CID_BASE;
i_cid < V4L2_CID_LASTP1;
i_cid ++ )
{
queryctrl.id = i_cid;
if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
{
struct v4l2_control control;
if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
continue;
memset( &control, 0, sizeof( control ) );
control.id = queryctrl.id;
if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
&& queryctrl.default_value != control.value )
{
int i;
for( i = 0; controls[i].psz_name != NULL; i++ )
if( controls[i].i_cid == queryctrl.id ) break;
name2var( queryctrl.name );
Control( p_obj, i_fd,
controls[i].psz_name ? : (const char *)queryctrl.name,
queryctrl.id, queryctrl.default_value );
}
}
}
/* private controls */
for( i_cid = V4L2_CID_PRIVATE_BASE;
;
i_cid ++ )
{
queryctrl.id = i_cid;
if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) >= 0 )
{
struct v4l2_control control;
if( queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
continue;
memset( &control, 0, sizeof( control ) );
control.id = queryctrl.id;
if( v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control ) >= 0
&& queryctrl.default_value != control.value )
{
name2var( queryctrl.name );
Control( p_obj, i_fd, (const char *)queryctrl.name,
queryctrl.id, queryctrl.default_value );
}
}
else
break;
}
}
return VLC_SUCCESS;
}
/*****************************************************************************
* Issue user-class v4l2 controls
*****************************************************************************/
static int Control( vlc_object_t *p_obj, int i_fd,
const char *psz_name, int i_cid, int i_value )
{
struct v4l2_queryctrl queryctrl;
struct v4l2_control control;
struct v4l2_ext_control ext_control;
struct v4l2_ext_controls ext_controls;
if( i_value == -1 )
return VLC_SUCCESS;
memset( &queryctrl, 0, sizeof( queryctrl ) );
queryctrl.id = i_cid;
if( v4l2_ioctl( i_fd, VIDIOC_QUERYCTRL, &queryctrl ) < 0
|| queryctrl.flags & V4L2_CTRL_FLAG_DISABLED )
{
msg_Dbg( p_obj, "%s (%x) control is not supported.", psz_name, i_cid );
return VLC_EGENERIC;
}
memset( &control, 0, sizeof( control ) );
memset( &ext_control, 0, sizeof( ext_control ) );
memset( &ext_controls, 0, sizeof( ext_controls ) );
control.id = i_cid;
ext_control.id = i_cid;
ext_controls.ctrl_class = V4L2_CTRL_ID2CLASS( i_cid );
ext_controls.count = 1;
ext_controls.controls = &ext_control;
int i_ret = -1;
if( i_value >= 0 )
{
ext_control.value = i_value;
if( v4l2_ioctl( i_fd, VIDIOC_S_EXT_CTRLS, &ext_controls ) < 0 )
{
control.value = i_value;
if( v4l2_ioctl( i_fd, VIDIOC_S_CTRL, &control ) < 0 )
{
msg_Err( p_obj, "unable to set %s (%x) to %d (%m)",
psz_name, i_cid, i_value );
return VLC_EGENERIC;
}
i_ret = v4l2_ioctl( i_fd, VIDIOC_G_CTRL, &control );
}
else
{
i_ret = v4l2_ioctl( i_fd, VIDIOC_G_EXT_CTRLS, &ext_controls );
control.value = ext_control.value;
}
}
if( i_ret >= 0 )
{
vlc_value_t val;
msg_Dbg( p_obj, "video %s: %d", psz_name, control.value );
switch( var_Type( p_obj, psz_name ) & VLC_VAR_TYPE )
{
case VLC_VAR_BOOL:
val.b_bool = control.value;
var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
var_SetVoid( p_obj, "controls-update" );
break;
case VLC_VAR_INTEGER:
val.i_int = control.value;
var_Change( p_obj, psz_name, VLC_VAR_SETVALUE, &val, NULL );
var_SetVoid( p_obj, "controls-update" );
break;
}
}
return VLC_SUCCESS;
}
/*****************************************************************************
* On the fly change settings callback
*****************************************************************************/
static int DemuxControlCallback( vlc_object_t *p_this,
const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
void *p_data )
{
(void)oldval;
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys = p_demux->p_sys;
int i_cid = (long int)p_data;
int i_fd = p_sys->i_fd;
if( i_fd < 0 )
return VLC_EGENERIC;
Control( p_this, i_fd, psz_var, i_cid, newval.i_int );
return VLC_EGENERIC;
}
static int DemuxControlResetCallback( vlc_object_t *p_this,
const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
(void)psz_var; (void)oldval; (void)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;
if( i_fd < 0 )
return VLC_EGENERIC;
ControlReset( p_this, i_fd );
return VLC_EGENERIC;
}
static int AccessControlCallback( vlc_object_t *p_this,
const char *psz_var, vlc_value_t oldval, vlc_value_t newval,
void *p_data )
{
(void)oldval;
access_t *p_access = (access_t *)p_this;
demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
int i_cid = (long int)p_data;
int i_fd = p_sys->i_fd;
if( i_fd < 0 )
return VLC_EGENERIC;
Control( p_this, i_fd, psz_var, i_cid, newval.i_int );
return VLC_EGENERIC;
}
static int AccessControlResetCallback( vlc_object_t *p_this,
const char *psz_var, vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
(void)psz_var; (void)oldval; (void)newval; (void)p_data;
access_t *p_access = (access_t *)p_this;
demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
int i_fd = p_sys->i_fd;
if( i_fd < 0 )
return VLC_EGENERIC;
ControlReset( p_this, i_fd );
return VLC_EGENERIC;
}
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