v4l2.c
资源名称:vlc-1.0.5.zip [点击查看]
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上传日期:2020-07-06
资源大小:29949k
文件大小:117k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * v4l2.c : Video4Linux2 input module for vlc
- *****************************************************************************
- * Copyright (C) 2002-2009 the VideoLAN team
- * $Id: 2659b81508dd38b01076426bc93dd9ee49e660a5 $
- *
- * 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_charset.h>
- #include <vlc_demux.h>
- #include <vlc_input.h>
- #include <ctype.h>
- #include <fcntl.h>
- #include <sys/ioctl.h>
- #include <sys/mman.h>
- #include <linux/videodev2.h>
- #include <poll.h>
- #ifdef HAVE_LIBV4L2
- # include <libv4l2.h>
- #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)." )
- #ifdef HAVE_LIBV4L2
- #define LIBV4L2_TEXT N_( "Use libv4l2" )
- #define LIBV4L2_LONGTEXT N_(
- "Force usage of the libv4l2 wrapper." )
- #endif
- #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." )
- #define ASPECT_TEXT N_("Picture aspect-ratio n:m")
- #define ASPECT_LONGTEXT N_("Define input picture aspect-ratio to use. Default is 4:3" )
- typedef enum {
- IO_METHOD_AUTO,
- 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_AUTO, IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR };
- static const char *const psz_iomethod_list_text[] =
- { N_("AUTO"), 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_AUTO, 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_string( CFG_PREFIX "aspect-ratio", "4:3", NULL, ASPECT_TEXT,
- ASPECT_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 )
- #ifdef HAVE_LIBV4L2
- add_bool( CFG_PREFIX "use-libv4l2", false, NULL, LIBV4L2_TEXT, LIBV4L2_LONGTEXT, true );
- #endif
- 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( "v4l2" )
- 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 block_t *AccessRead( access_t * );
- static ssize_t AccessReadStream( access_t * p_access, uint8_t * p_buffer, size_t i_len );
- static block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys );
- static block_t* ProcessVideoFrame( vlc_object_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 *, demux_sys_t *, int , bool, bool );
- static int Control( vlc_object_t *, demux_sys_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 },
- { V4L2_PIX_FMT_JPEG, VLC_FOURCC('J','P','E','G'), 0, 0, 0 },
- #if 0
- { 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, V4L2_PIX_FMT_JPEG };
- 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;
- unsigned int i_aspect;
- 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;
- #ifdef HAVE_LIBV4L2
- /* */
- int (*pf_close)( int );
- int (*pf_dup)( int );
- int (*pf_ioctl)( int, unsigned long int, ... );
- ssize_t (*pf_read)( int, void *, size_t );
- void *(*pf_mmap)( void *, size_t, int, int, int, off_t );
- int (*pf_munmap)( void *, size_t );
- bool b_libv4l2;
- #endif
- };
- #ifdef HAVE_LIBV4L2
- static void use_kernel_v4l2( demux_sys_t *p_sys )
- {
- p_sys->pf_close = close;
- p_sys->pf_dup = dup;
- p_sys->pf_ioctl = ioctl;
- p_sys->pf_read = read;
- p_sys->pf_mmap = mmap;
- p_sys->pf_munmap = munmap;
- p_sys->b_libv4l2 = false;
- }
- static void use_libv4l2( demux_sys_t *p_sys )
- {
- p_sys->pf_close = v4l2_close;
- p_sys->pf_dup = v4l2_dup;
- p_sys->pf_ioctl = v4l2_ioctl;
- p_sys->pf_read = v4l2_read;
- p_sys->pf_mmap = v4l2_mmap;
- p_sys->pf_munmap = v4l2_munmap;
- p_sys->b_libv4l2 = true;
- }
- # define v4l2_close (p_sys->pf_close)
- # define v4l2_dup (p_sys->pf_dup)
- # define v4l2_ioctl (p_sys->pf_ioctl)
- # define v4l2_read (p_sys->pf_read)
- # define v4l2_mmap (p_sys->pf_mmap)
- # define v4l2_munmap (p_sys->pf_munmap)
- #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
- 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( strcmp( p_demux->psz_access, "v4l2" ) )
- 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 );
- #ifdef HAVE_LIBV4L2
- if( !config_GetInt( p_this, CFG_PREFIX "use-libv4l2" ) )
- {
- msg_Dbg( p_this, "Trying direct kernel v4l2" );
- use_kernel_v4l2( p_sys );
- if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
- return VLC_SUCCESS;
- }
- msg_Dbg( p_this, "Trying libv4l2 wrapper" );
- use_libv4l2( p_sys );
- #endif
- if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
- return VLC_SUCCESS;
- DemuxClose( p_this );
- return VLC_EGENERIC;
- }
- /*****************************************************************************
- * 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" );
- char *psz_aspect = var_CreateGetString( p_obj, "v4l2-aspect-ratio" );
- if( psz_aspect && *psz_aspect && strchr( psz_aspect, ':' ) )
- {
- char *psz_delim = strchr( psz_aspect, ':' );
- p_sys->i_aspect = atoi( psz_aspect ) * VOUT_ASPECT_FACTOR / atoi( psz_delim + 1 );
- }
- else
- {
- p_sys->i_aspect = 4 * VOUT_ASPECT_FACTOR / 3 ;
- }
- free( psz_aspect );
- 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++ = ' ';
- 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 = us_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 if( !strncmp( psz_parser, "auto", strlen( "auto" ) ) )
- {
- p_sys->io = IO_METHOD_AUTO;
- psz_parser += strlen( "auto" );
- }
- 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, "aspect-ratio=",
- strlen( "aspect-ratio=" ) ) )
- {
- unsigned int num,den;
- num = strtol( psz_parser + strlen( "aspect-ratio=" ),
- &psz_parser, 0 );
- den = strtol( psz_parser + strlen( ":" ),
- &psz_parser, 0 );
- if( num && den )
- p_sys->i_aspect = num * VOUT_ASPECT_FACTOR / den;
- }
- 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 == ' ' )
- {
- 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;
- default:
- 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;
- default:
- 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 == ' ' ) return VLC_EGENERIC;
- access_InitFields( p_access );
- p_sys = calloc( 1, sizeof( demux_sys_t ));
- if( !p_sys ) return VLC_ENOMEM;
- p_access->p_sys = (access_sys_t*)p_sys;
- GetV4L2Params( p_sys, (vlc_object_t *) p_access );
- ParseMRL( p_sys, p_access->psz_path, (vlc_object_t *) p_access );
- #ifdef HAVE_LIBV4L2
- if( !config_GetInt( p_this, CFG_PREFIX "use-libv4l2" ) )
- {
- msg_Dbg( p_this, "Trying direct kernel v4l2" );
- use_kernel_v4l2( p_sys );
- if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS)
- {
- if( p_sys->io == IO_METHOD_READ )
- {
- ACCESS_SET_CALLBACKS( AccessReadStream, NULL, AccessControl, NULL );
- }
- else
- {
- ACCESS_SET_CALLBACKS( NULL, AccessRead, AccessControl, NULL );
- }
- return VLC_SUCCESS;
- }
- }
- msg_Dbg( p_this, "Trying libv4l2 wrapper" );
- use_libv4l2( p_sys );
- #endif
- if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS )
- {
- if( p_sys->io == IO_METHOD_READ )
- {
- ACCESS_SET_CALLBACKS( AccessReadStream, NULL, AccessControl, NULL );
- }
- else
- {
- ACCESS_SET_CALLBACKS( NULL, AccessRead, AccessControl, NULL );
- }
- return VLC_SUCCESS;
- }
- AccessClose( p_this );
- return VLC_EGENERIC;
- }
- /*****************************************************************************
- * 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;
- 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_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 block_t *AccessRead( access_t * p_access )
- {
- demux_sys_t *p_sys = (demux_sys_t *)p_access->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) )
- {
- return GrabVideo( VLC_OBJECT(p_access), p_sys );
- }
- }
- return NULL;
- }
- static ssize_t AccessReadStream( 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( VLC_OBJECT(p_demux), p_sys );
- 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( vlc_object_t *p_demux, demux_sys_t *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;
- default:
- 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( vlc_object_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( vlc_object_t *p_demux, demux_sys_t *p_sys, unsigned int i_buffer_size )
- {
- (void)p_demux;
- 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( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd )
- {
- 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( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd, unsigned int i_buffer_size )
- {
- 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
- #ifdef HAVE_LIBV4L2
- demux_sys_t *p_sys = p_demux->p_sys;
- #endif
- /* This is new in Linux 2.6.19 */
- struct v4l2_frmivalenum frmival;
- memset( &frmival, 0, sizeof(frmival) );
- 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
- #ifdef HAVE_LIBV4L2
- demux_sys_t *p_sys = p_demux->p_sys;
- #endif
- /* This is new in Linux 2.6.19 */
- struct v4l2_frmsizeenum frmsize;
- memset( &frmsize, 0, sizeof(frmsize) );
- 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
- #ifdef HAVE_LIBV4L2
- demux_sys_t *p_sys = p_demux->p_sys;
- #endif
- /* This is new in Linux 2.6.19 */
- struct v4l2_frmsizeenum frmsize;
- memset( &frmsize, 0, sizeof(frmsize) );
- 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;
- 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. */
- if( p_sys->b_libv4l2 )
- {
- int libv4l2_fd;
- libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
- if( libv4l2_fd != -1 )
- i_fd = libv4l2_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, p_sys, i_fd,
- var_GetBool( p_obj, "v4l2-controls-reset" ), b_demux );
- SetAvailControlsByString( p_obj, p_sys, i_fd );
- /* 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_obj, "device does not support read i/o" );
- goto open_failed;
- }
- msg_Dbg( p_obj, "using read i/o" );
- break;
- case IO_METHOD_MMAP:
- case IO_METHOD_USERPTR:
- if( !(p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING) )
- {
- msg_Err( p_obj, "device does not support streaming i/o" );
- goto open_failed;
- }
- if( p_sys->io == IO_METHOD_MMAP )
- msg_Dbg( p_obj, "using streaming i/o (mmap)" );
- else
- msg_Dbg( p_obj, "using streaming i/o (userptr)" );
- break;
- default:
- msg_Err( p_obj, "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( crop.c.width > 0 && crop.c.height > 0 ) /* Fix for fm tuners */
- {
- 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_obj, "Cannot get default width and height." );
- goto open_failed;
- }
- msg_Dbg( p_obj, "found default width and height of %ux%u",
- fmt.fmt.pix.width, fmt.fmt.pix.height );
- if( p_sys->i_width < 0 || p_sys->i_height < 0 )
- {
- msg_Dbg( p_obj, "will try to find optimal width and height." );
- }
- }
- else
- {
- /* Use user specified width and height */
- msg_Dbg( p_obj, "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_NONE;
- if (b_demux)
- {
- demux_t *p_demux = (demux_t *) p_obj;
- /* Test and set Chroma */
- fmt.fmt.pix.pixelformat = 0;
- if( p_sys->psz_requested_chroma && *p_sys->psz_requested_chroma )
- {
- /* User specified chroma */
- 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 */
- bool b_error = !IsPixelFormatSupported( p_demux, fmt.fmt.pix.pixelformat );
- if( !b_error && fmt.fmt.pix.pixelformat )
- {
- if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
- {
- fmt.fmt.pix.field = V4L2_FIELD_ANY;
- if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
- {
- fmt.fmt.pix.field = V4L2_FIELD_NONE;
- b_error = true;
- }
- }
- }
- if( b_error )
- {
- 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 ) )
- {
- if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
- break;
- fmt.fmt.pix.field = V4L2_FIELD_ANY;
- if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) >= 0 )
- break;
- fmt.fmt.pix.field = V4L2_FIELD_NONE;
- }
- }
- 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 );
- }
- uint32_t i_width, i_height;
- GetMaxDimensions( p_demux, i_fd,
- fmt.fmt.pix.pixelformat, p_sys->f_fps,
- &i_width, &i_height );
- if( i_width || i_height )
- {
- msg_Dbg( p_demux, "Found optimal dimensions for framerate %f "
- "of %ux%u", p_sys->f_fps, i_width, i_height );
- fmt.fmt.pix.width = i_width;
- fmt.fmt.pix.height = i_height;
- if( v4l2_ioctl( i_fd, VIDIOC_S_FMT, &fmt ) < 0 )
- {
- msg_Err( p_obj, "Cannot set size to optimal dimensions "
- "%ux%u", i_width, i_height );
- goto open_failed;
- }
- }
- else
- {
- msg_Warn( p_obj, "Could not find optimal width and height, "
- "falling back to driver default." );
- }
- }
- }
- p_sys->i_width = fmt.fmt.pix.width;
- p_sys->i_height = fmt.fmt.pix.height;
- if( v4l2_ioctl( i_fd, VIDIOC_G_FMT, &fmt ) < 0 ) {;}
- /* Print extra info */
- msg_Dbg( p_obj, "Driver requires at most %d bytes to store a complete image", fmt.fmt.pix.sizeimage );
- /* Check interlacing */
- switch( fmt.fmt.pix.field )
- {
- case V4L2_FIELD_NONE:
- msg_Dbg( p_obj, "Interlacing setting: progressive" );
- break;
- case V4L2_FIELD_TOP:
- msg_Dbg( p_obj, "Interlacing setting: top field only" );
- break;
- case V4L2_FIELD_BOTTOM:
- msg_Dbg( p_obj, "Interlacing setting: bottom field only" );
- break;
- case V4L2_FIELD_INTERLACED:
- msg_Dbg( p_obj, "Interlacing setting: interleaved (bottom top if M/NTSC, top bottom otherwise)" );
- break;
- case V4L2_FIELD_SEQ_TB:
- msg_Dbg( p_obj, "Interlacing setting: sequential top bottom" );
- break;
- case V4L2_FIELD_SEQ_BT:
- msg_Dbg( p_obj, "Interlacing setting: sequential bottom top" );
- break;
- case V4L2_FIELD_ALTERNATE:
- msg_Dbg( p_obj, "Interlacing setting: alternate fields" );
- p_sys->i_height = p_sys->i_height * 2;
- break;
- case V4L2_FIELD_INTERLACED_TB:
- msg_Dbg( p_obj, "Interlacing setting: interleaved top bottom" );
- break;
- case V4L2_FIELD_INTERLACED_BT:
- msg_Dbg( p_obj, "Interlacing setting: interleaved bottom top" );
- break;
- default:
- msg_Warn( p_obj, "Interlacing setting: unknown type (%d)",
- fmt.fmt.pix.field );
- break;
- }
- if( fmt.fmt.pix.field != V4L2_FIELD_NONE )
- msg_Warn( p_obj, "Interlaced inputs haven't been tested. Please report any issue." );
- /* 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;
- memset( &frmival, 0, sizeof(frmival) );
- 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_obj, "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_obj, " 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_obj, " 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_obj, " 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( b_demux )
- if( InitRead( p_obj, p_sys, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
- break;
- case IO_METHOD_MMAP:
- if( InitMmap( p_obj, p_sys, i_fd ) != VLC_SUCCESS ) goto open_failed;
- break;
- case IO_METHOD_USERPTR:
- if( InitUserP( p_obj, p_sys, i_fd, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
- break;
- default:
- goto open_failed;
- break;
- }
- if( b_demux )
- {
- /* Add */
- es_fmt.video.i_width = p_sys->i_width;
- es_fmt.video.i_height = p_sys->i_height;
- /* Get aspect-ratio */
- es_fmt.video.i_aspect = p_sys->i_aspect;
- demux_t *p_demux = (demux_t *) p_obj;
- 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_obj, "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_obj, "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_obj, "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_obj, "VIDIOC_STREAMON failed" );
- goto open_failed;
- }
- break;
- default:
- goto open_failed;
- break;
- }
- /* report fps */
- if( p_sys->f_fps >= 0.1 )
- {
- msg_Dbg( p_obj, "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;
- 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. */
- if( p_sys->b_libv4l2 )
- {
- int libv4l2_fd;
- libv4l2_fd = v4l2_fd_open( i_fd, V4L2_ENABLE_ENUM_FMT_EMULATION );
- if( libv4l2_fd != -1 )
- i_fd = libv4l2_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, "
- "(%c) Radio",
- ( 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':' '),
- ( p_sys->dev_cap.capabilities & V4L2_CAP_RADIO ? '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':' ' ) );
- if( p_sys->io == IO_METHOD_AUTO )
- {
- if( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING )
- p_sys->io = IO_METHOD_MMAP;
- else if( p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE )
- p_sys->io = IO_METHOD_READ;
- else
- msg_Err( p_obj, "No known I/O method supported" );
- }
- if( p_sys->dev_cap.capabilities & V4L2_CAP_RDS_CAPTURE )
- msg_Dbg( p_obj, "device supports RDS" );
- #ifdef V4L2_CAP_HW_FREQ_SEEK
- if( p_sys->dev_cap.capabilities & V4L2_CAP_HW_FREQ_SEEK )
- msg_Dbg( p_obj, "device supports hardware frequency seeking" );
- #endif
- if( p_sys->dev_cap.capabilities & V4L2_CAP_VBI_CAPTURE )
- msg_Dbg( p_obj, "device support raw VBI capture" );
- if( p_sys->dev_cap.capabilities & V4L2_CAP_SLICED_VBI_CAPTURE )
- msg_Dbg( p_obj, "device support sliced VBI capture" );
- /* 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;
- memset( &t_input, 0, sizeof(t_input) );
- p_sys->i_input = 0;
- while( v4l2_ioctl( i_fd, VIDIOC_ENUMINPUT, &t_input ) >= 0 )
- {
- p_sys->i_input++;
- t_input.index = p_sys->i_input;
- }
- free( p_sys->p_inputs );
- 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;
- p_sys->i_standard = 0;
- while( v4l2_ioctl( i_fd, VIDIOC_ENUMSTD, &t_standards ) >=0 )
- {
- p_sys->i_standard++;
- t_standards.index = p_sys->i_standard;
- }
- free( p_sys->p_standards );
- 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) );
- p_sys->i_tuner = 0;
- 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;
- }
- free( p_sys->p_tuners );
- 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;
- free( p_sys->p_codecs );
- 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;
- memset( &frmsize, 0, sizeof(frmsize) );
- 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, demux_sys_t *p_sys, 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, p_sys, i_fd, psz_name,
- queryctrl.id, queryctrl.default_value );
- }
- }
- else
- {
- Control( p_obj, p_sys, 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, demux_sys_t *p_sys, 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, p_sys, 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, p_sys, 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, p_sys, 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, p_sys, i_fd, psz_name, i_cid,
- strtol( ++psz_assign, &psz_parser, 0) );
- }
- free( name.psz_string );
- }
- 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;
- }
- }
- var_Change( p_obj, "allcontrols", VLC_VAR_FREELIST, &val, &text );
- }
- /*****************************************************************************
- * Reset all user-class v4l2 controls to their default value
- *****************************************************************************/
- static int ControlReset( vlc_object_t *p_obj, demux_sys_t *p_sys, 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, p_sys, i_fd,
- controls[i].psz_name ? 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, p_sys, i_fd,
- controls[i].psz_name ? 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, p_sys, 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, demux_sys_t *p_sys, int i_fd,
- const char *psz_name, int i_cid, int i_value )
- {
- (void)p_sys;
- 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 >= queryctrl.minimum && i_value <= queryctrl.maximum )
- {
- 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, p_sys, 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, p_sys, 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, p_sys, 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, p_sys, i_fd );
- return VLC_EGENERIC;
- }