/***************************************************************************** * v4l2.c : Video4Linux2 input module for VLC ***************************************************************************** * Copyright (C) 2002-2009 VLC authors and VideoLAN * Copyright (C) 2011-2012 Rémi Denis-Courmont * * Authors: Benjamin Pracht * Richard Hosking * Antoine Cellerier * Dennis Lou * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser 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. *****************************************************************************/ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include #include #include #include #include #include "v4l2.h" #define VIDEO_DEVICE_TEXT N_( "Video capture device" ) #define VIDEO_DEVICE_LONGTEXT N_("Video capture device node." ) #define VBI_DEVICE_TEXT N_("VBI capture device") #define VBI_DEVICE_LONGTEXT N_( \ "The device node where VBI data can be read " \ "(for closed captions)." ) #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 WIDTH_TEXT N_( "Width" ) #define HEIGHT_TEXT N_( "Height" ) #define SIZE_LONGTEXT N_( \ "The specified pixel resolution is forced " \ "(if both width and height are strictly positive)." ) #define FPS_TEXT N_( "Frame rate" ) #define FPS_LONGTEXT N_( "Maximum frame rate to use (0 = no limits)." ) #define RADIO_DEVICE_TEXT N_( "Radio device" ) #define RADIO_DEVICE_LONGTEXT N_("Radio tuner device node." ) #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 CTRL_RESET_TEXT N_( "Reset controls" ) #define CTRL_RESET_LONGTEXT N_( "Reset controls to defaults." ) #define BRIGHTNESS_TEXT N_( "Brightness" ) #define BRIGHTNESS_LONGTEXT N_( "Picture brightness or black level." ) #define BRIGHTNESS_AUTO_TEXT N_( "Automatic brightness" ) #define BRIGHTNESS_AUTO_LONGTEXT N_( \ "Automatically adjust the picture brightness." ) #define CONTRAST_TEXT N_( "Contrast" ) #define CONTRAST_LONGTEXT N_( "Picture contrast or luma gain." ) #define SATURATION_TEXT N_( "Saturation" ) #define SATURATION_LONGTEXT N_( "Picture saturation or chroma gain." ) #define HUE_TEXT N_( "Hue" ) #define HUE_LONGTEXT N_( "Hue or color balance." ) #define HUE_AUTO_TEXT N_( "Automatic hue" ) #define HUE_AUTO_LONGTEXT N_( \ "Automatically adjust the picture hue." ) #define WHITE_BALANCE_TEMP_TEXT N_( "White balance temperature (K)" ) #define WHITE_BALANCE_TEMP_LONGTEXT N_( \ "White balance temperature as a color temperation in Kelvin " \ "(2800 is minimum incandescence, 6500 is maximum daylight)." ) #define AUTOWHITEBALANCE_TEXT N_( "Automatic white balance" ) #define AUTOWHITEBALANCE_LONGTEXT N_( \ "Automatically adjust the picture white balance." ) #define REDBALANCE_TEXT N_( "Red balance" ) #define REDBALANCE_LONGTEXT N_( \ "Red chroma balance." ) #define BLUEBALANCE_TEXT N_( "Blue balance" ) #define BLUEBALANCE_LONGTEXT N_( \ "Blue chroma balance." ) #define GAMMA_TEXT N_( "Gamma" ) #define GAMMA_LONGTEXT N_( \ "Gamma adjust." ) #define AUTOGAIN_TEXT N_( "Automatic gain" ) #define AUTOGAIN_LONGTEXT N_( \ "Automatically set the video gain." ) #define GAIN_TEXT N_( "Gain" ) #define GAIN_LONGTEXT N_( \ "Picture gain." ) #define SHARPNESS_TEXT N_( "Sharpness" ) #define SHARPNESS_LONGTEXT N_( "Sharpness filter adjust." ) #define CHROMA_GAIN_TEXT N_( "Chroma gain" ) #define CHROMA_GAIN_LONGTEXT N_( "Chroma gain control." ) #define CHROMA_GAIN_AUTO_TEXT N_( "Automatic chroma gain" ) #define CHROMA_GAIN_AUTO_LONGTEXT N_( \ "Automatically control the chroma gain." ) #define POWER_FREQ_TEXT N_( "Power line frequency" ) #define POWER_FREQ_LONGTEXT N_( \ "Power line frequency anti-flicker filter." ) static const int power_freq_vlc[] = { -1, V4L2_CID_POWER_LINE_FREQUENCY_DISABLED, V4L2_CID_POWER_LINE_FREQUENCY_50HZ, V4L2_CID_POWER_LINE_FREQUENCY_60HZ, V4L2_CID_POWER_LINE_FREQUENCY_AUTO, }; static const char *const power_freq_user[] = { N_("Unspecified"), N_("Off"), N_("50 Hz"), N_("60 Hz"), N_("Automatic"), }; #define BKLT_COMPENSATE_TEXT N_( "Backlight compensation" ) #define BKLT_COMPENSATE_LONGTEXT BKLT_COMPENSATE_TEXT #define BAND_STOP_FILTER_TEXT N_( "Band-stop filter" ) #define BAND_STOP_FILTER_LONGTEXT N_( \ "Cut a light band induced by fluorescent lighting (unit undocumented)." ) #define HFLIP_TEXT N_( "Horizontal flip" ) #define HFLIP_LONGTEXT N_( \ "Flip the picture horizontally." ) #define VFLIP_TEXT N_( "Vertical flip" ) #define VFLIP_LONGTEXT N_( \ "Flip the picture vertically." ) #define ROTATE_TEXT N_( "Rotate (degrees)" ) #define ROTATE_LONGTEXT N_( "Picture rotation angle (in degrees)." ) #define COLOR_KILLER_TEXT N_( "Color killer" ) #define COLOR_KILLER_LONGTEXT N_( \ "Enable the color killer, i.e. switch to black & white picture " \ "whenever the signal is weak." ) #define COLOR_EFFECT_TEXT N_( "Color effect" ) #define COLOR_EFFECT_LONGTEXT N_( "Select a color effect." ) static const int colorfx_vlc[] = { -1, V4L2_COLORFX_NONE, V4L2_COLORFX_BW, V4L2_COLORFX_SEPIA, V4L2_COLORFX_NEGATIVE, V4L2_COLORFX_EMBOSS, V4L2_COLORFX_SKETCH, V4L2_COLORFX_SKY_BLUE, V4L2_COLORFX_GRASS_GREEN, V4L2_COLORFX_SKIN_WHITEN, V4L2_COLORFX_VIVID, }; static const char *const colorfx_user[] = { N_("Unspecified"), N_("None"), N_("Black & white"), N_("Sepia"), N_("Negative"), N_("Emboss"), N_("Sketch"), N_("Sky blue"), N_("Grass green"), N_("Skin whiten"), N_("Vivid"), }; #define AUDIO_VOLUME_TEXT N_( "Audio volume" ) #define AUDIO_VOLUME_LONGTEXT N_( \ "Volume of the audio input." ) #define AUDIO_BALANCE_TEXT N_( "Audio balance" ) #define AUDIO_BALANCE_LONGTEXT N_( \ "Balance of the audio input." ) #define AUDIO_BASS_TEXT N_( "Bass level" ) #define AUDIO_BASS_LONGTEXT N_( \ "Bass adjustment of the audio input." ) #define AUDIO_TREBLE_TEXT N_( "Treble level" ) #define AUDIO_TREBLE_LONGTEXT N_( \ "Treble adjustment of the audio input." ) #define AUDIO_MUTE_TEXT N_( "Mute" ) #define AUDIO_MUTE_LONGTEXT N_( \ "Mute the audio." ) #define AUDIO_LOUDNESS_TEXT N_( "Loudness mode" ) #define AUDIO_LOUDNESS_LONGTEXT N_( \ "Loudness mode a.k.a. bass boost." ) #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 (-vv) " \ "or use the v4l2-ctl application." ) #define ASPECT_TEXT N_("Picture aspect-ratio n:m") #define ASPECT_LONGTEXT N_("Define input picture aspect-ratio to use. Default is 4:3" ) static const int tristate_vlc[] = { -1, 0, 1 }; static const char *const tristate_user[] = { N_("Unspecified"), N_("Off"), N_("On") }; static const v4l2_std_id standards_v4l2[] = { V4L2_STD_UNKNOWN, V4L2_STD_ALL, V4L2_STD_PAL, V4L2_STD_PAL_BG, V4L2_STD_PAL_DK, V4L2_STD_NTSC, V4L2_STD_SECAM, V4L2_STD_SECAM_DK, V4L2_STD_MTS, V4L2_STD_525_60, V4L2_STD_625_50, V4L2_STD_ATSC, V4L2_STD_B, V4L2_STD_G, V4L2_STD_H, V4L2_STD_L, V4L2_STD_GH, V4L2_STD_DK, V4L2_STD_BG, V4L2_STD_MN, V4L2_STD_PAL_B, V4L2_STD_PAL_B1, V4L2_STD_PAL_G, V4L2_STD_PAL_H, V4L2_STD_PAL_I, V4L2_STD_PAL_D, V4L2_STD_PAL_D1, V4L2_STD_PAL_K, V4L2_STD_PAL_M, V4L2_STD_PAL_N, V4L2_STD_PAL_Nc, V4L2_STD_PAL_60, V4L2_STD_NTSC_M, V4L2_STD_NTSC_M_JP,V4L2_STD_NTSC_443, V4L2_STD_NTSC_M_KR, V4L2_STD_SECAM_B, V4L2_STD_SECAM_D, V4L2_STD_SECAM_G, V4L2_STD_SECAM_H, V4L2_STD_SECAM_K, V4L2_STD_SECAM_K1, V4L2_STD_SECAM_L, V4L2_STD_SECAM_LC, V4L2_STD_ATSC_8_VSB, V4L2_STD_ATSC_16_VSB, }; static const char *const standards_vlc[] = { "", "ALL", /* Pseudo standards */ "PAL", "PAL_BG", "PAL_DK", "NTSC", "SECAM", "SECAM_DK", "MTS", "525_60", "625_50", "ATSC", /* Chroma-agnostic ITU standards (PAL/NTSC or PAL/SECAM) */ "B", "G", "H", "L", "GH", "DK", "BG", "MN", /* Individual standards */ "PAL_B", "PAL_B1", "PAL_G", "PAL_H", "PAL_I", "PAL_D", "PAL_D1", "PAL_K", "PAL_M", "PAL_N", "PAL_Nc", "PAL_60", "NTSC_M", "NTSC_M_JP", "NTSC_443", "NTSC_M_KR", "SECAM_B", "SECAM_D", "SECAM_G", "SECAM_H", "SECAM_K", "SECAM_K1", "SECAM_L", "SECAM_LC", "ATSC_8_VSB", "ATSC_16_VSB", }; static const char *const standards_user[] = { N_("Undefined"), N_("All"), "PAL", "PAL B/G", "PAL D/K", "NTSC", "SECAM", "SECAM D/K", N_("Multichannel television sound (MTS)"), N_("525 lines / 60 Hz"), N_("625 lines / 50 Hz"), "ATSC", "PAL/SECAM B", "PAL/SECAM G", "PAL/SECAM H", "PAL/SECAM L", "PAL/SECAM G/H", "PAL/SECAM D/K", "PAL/SECAM B/G", "PAL/NTSC M/N", "PAL B", "PAL B1", "PAL G", "PAL H", "PAL I", "PAL D", "PAL D1", "PAL K", "PAL M", "PAL N", N_("PAL N Argentina"), "PAL 60", "NTSC M", N_("NTSC M Japan"), "NTSC 443", N_("NTSC M South Korea"), "SECAM B", "SECAM D", "SECAM G", "SECAM H", "SECAM K", "SECAM K1", "SECAM L", "SECAM L/C", "ATSC 8-VSB", "ATSC 16-VSB", }; 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_LANG1_LANG2 }; static const char *const psz_tuner_audio_modes_list_text[] = { N_("Mono"), N_("Stereo"), N_("Primary language"), N_("Secondary language or program"), N_("Dual mono" ) }; vlc_module_begin () set_shortname( N_("V4L") ) set_description( N_("Video4Linux input") ) set_category( CAT_INPUT ) set_subcategory( SUBCAT_INPUT_ACCESS ) set_section( N_( "Video input" ), NULL ) add_loadfile( CFG_PREFIX "dev", "/dev/video0", VIDEO_DEVICE_TEXT, VIDEO_DEVICE_LONGTEXT, false ) change_safe() #ifdef ZVBI_COMPILED add_loadfile( CFG_PREFIX "vbidev", NULL, VBI_DEVICE_TEXT, VBI_DEVICE_LONGTEXT, false ) #endif add_string( CFG_PREFIX "standard", "", STANDARD_TEXT, STANDARD_LONGTEXT, false ) change_string_list( standards_vlc, standards_user ) change_safe() add_string( CFG_PREFIX "chroma", NULL, CHROMA_TEXT, CHROMA_LONGTEXT, true ) change_safe() add_integer( CFG_PREFIX "input", 0, INPUT_TEXT, INPUT_LONGTEXT, true ) change_integer_range( 0, 0xFFFFFFFE ) change_safe() add_integer( CFG_PREFIX "audio-input", -1, AUDIO_INPUT_TEXT, AUDIO_INPUT_LONGTEXT, true ) change_integer_range( -1, 0xFFFFFFFE ) change_safe() add_obsolete_integer( CFG_PREFIX "io" ) /* since 2.0.0 */ add_integer( CFG_PREFIX "width", 0, WIDTH_TEXT, SIZE_LONGTEXT, false ) change_integer_range( 0, VOUT_MAX_WIDTH ) change_safe() add_integer( CFG_PREFIX "height", 0, HEIGHT_TEXT, SIZE_LONGTEXT, false ) change_integer_range( 0, VOUT_MAX_WIDTH ) change_safe() add_string( CFG_PREFIX "aspect-ratio", "4:3", ASPECT_TEXT, ASPECT_LONGTEXT, true ) change_safe() add_string( CFG_PREFIX "fps", "60", FPS_TEXT, FPS_LONGTEXT, false ) change_safe() add_obsolete_bool( CFG_PREFIX "use-libv4l2" ) /* since 2.1.0 */ set_section( N_( "Tuner" ), NULL ) add_loadfile( CFG_PREFIX "radio-dev", "/dev/radio0", RADIO_DEVICE_TEXT, RADIO_DEVICE_LONGTEXT, false ) change_safe() add_obsolete_integer( CFG_PREFIX "tuner" ) /* since 2.1.0 */ add_integer( CFG_PREFIX "tuner-frequency", -1, FREQUENCY_TEXT, FREQUENCY_LONGTEXT, true ) change_integer_range( -1, 0xFFFFFFFE ) change_safe() add_integer( CFG_PREFIX "tuner-audio-mode", V4L2_TUNER_MODE_LANG1, TUNER_AUDIO_MODE_TEXT, TUNER_AUDIO_MODE_LONGTEXT, true ) change_integer_list( i_tuner_audio_modes_list, psz_tuner_audio_modes_list_text ) change_safe() set_section( N_( "Controls" ), N_( "Video capture controls (if supported by the device)" ) ) add_bool( CFG_PREFIX "controls-reset", false, CTRL_RESET_TEXT, CTRL_RESET_LONGTEXT, true ) change_safe() add_integer( CFG_PREFIX "brightness", -1, BRIGHTNESS_TEXT, BRIGHTNESS_LONGTEXT, true ) add_integer( CFG_PREFIX "brightness-auto", -1, BRIGHTNESS_AUTO_TEXT, BRIGHTNESS_AUTO_LONGTEXT, true ) change_integer_list( tristate_vlc, tristate_user ) add_integer( CFG_PREFIX "contrast", -1, CONTRAST_TEXT, CONTRAST_LONGTEXT, true ) add_integer( CFG_PREFIX "saturation", -1, SATURATION_TEXT, SATURATION_LONGTEXT, true ) add_integer( CFG_PREFIX "hue", -1, HUE_TEXT, HUE_LONGTEXT, true ) add_integer( CFG_PREFIX "hue-auto", -1, HUE_AUTO_TEXT, HUE_AUTO_LONGTEXT, true ) change_integer_list( tristate_vlc, tristate_user ) add_obsolete_integer( CFG_PREFIX "black-level" ) /* since Linux 2.6.26 */ add_integer( CFG_PREFIX "white-balance-temperature", -1, WHITE_BALANCE_TEMP_TEXT, WHITE_BALANCE_TEMP_LONGTEXT, true ) /* Ideally, the range should be 2800-6500 */ change_integer_range( -1, 6500 ) add_integer( CFG_PREFIX "auto-white-balance", -1, AUTOWHITEBALANCE_TEXT, AUTOWHITEBALANCE_LONGTEXT, true ) change_integer_list( tristate_vlc, tristate_user ) add_obsolete_integer( CFG_PREFIX"do-white-balance" ) /* since 2.0.0 */ add_integer( CFG_PREFIX "red-balance", -1, REDBALANCE_TEXT, REDBALANCE_LONGTEXT, true ) add_integer( CFG_PREFIX "blue-balance", -1, BLUEBALANCE_TEXT, BLUEBALANCE_LONGTEXT, true ) add_integer( CFG_PREFIX "gamma", -1, GAMMA_TEXT, GAMMA_LONGTEXT, true ) add_integer( CFG_PREFIX "autogain", -1, AUTOGAIN_TEXT, AUTOGAIN_LONGTEXT, true ) change_integer_list( tristate_vlc, tristate_user ) add_integer( CFG_PREFIX "gain", -1, GAIN_TEXT, GAIN_LONGTEXT, true ) add_integer( CFG_PREFIX "sharpness", -1, SHARPNESS_TEXT, SHARPNESS_LONGTEXT, true ) add_integer( CFG_PREFIX "chroma-gain", -1, CHROMA_GAIN_TEXT, CHROMA_GAIN_LONGTEXT, true ) add_integer( CFG_PREFIX "chroma-gain-auto", -1, CHROMA_GAIN_AUTO_TEXT, CHROMA_GAIN_AUTO_LONGTEXT, true ) add_integer( CFG_PREFIX"power-line-frequency", -1, POWER_FREQ_TEXT, POWER_FREQ_LONGTEXT, true ) change_integer_list( power_freq_vlc, power_freq_user ) add_integer( CFG_PREFIX"backlight-compensation", -1, BKLT_COMPENSATE_TEXT, BKLT_COMPENSATE_LONGTEXT, true ) add_integer( CFG_PREFIX "band-stop-filter", -1, BAND_STOP_FILTER_TEXT, BAND_STOP_FILTER_LONGTEXT, true ) add_bool( CFG_PREFIX "hflip", false, HFLIP_TEXT, HFLIP_LONGTEXT, true ) add_bool( CFG_PREFIX "vflip", false, VFLIP_TEXT, VFLIP_LONGTEXT, true ) add_integer( CFG_PREFIX "rotate", -1, ROTATE_TEXT, ROTATE_LONGTEXT, true ) change_integer_range( -1, 359 ) add_obsolete_integer( CFG_PREFIX "hcenter" ) /* since Linux 2.6.26 */ add_obsolete_integer( CFG_PREFIX "vcenter" ) /* since Linux 2.6.26 */ add_integer( CFG_PREFIX"color-killer", -1, COLOR_KILLER_TEXT, COLOR_KILLER_LONGTEXT, true ) change_integer_list( tristate_vlc, tristate_user ) add_integer( CFG_PREFIX"color-effect", -1, COLOR_EFFECT_TEXT, COLOR_EFFECT_LONGTEXT, true ) change_integer_list( colorfx_vlc, colorfx_user ) add_integer( CFG_PREFIX "audio-volume", -1, AUDIO_VOLUME_TEXT, AUDIO_VOLUME_LONGTEXT, true ) add_integer( CFG_PREFIX "audio-balance", -1, AUDIO_BALANCE_TEXT, AUDIO_BALANCE_LONGTEXT, true ) add_bool( CFG_PREFIX "audio-mute", false, AUDIO_MUTE_TEXT, AUDIO_MUTE_LONGTEXT, true ) add_integer( CFG_PREFIX "audio-bass", -1, AUDIO_BASS_TEXT, AUDIO_BASS_LONGTEXT, true ) add_integer( CFG_PREFIX "audio-treble", -1, AUDIO_TREBLE_TEXT, AUDIO_TREBLE_LONGTEXT, true ) add_bool( CFG_PREFIX "audio-loudness", false, AUDIO_LOUDNESS_TEXT, AUDIO_LOUDNESS_LONGTEXT, true ) add_string( CFG_PREFIX "set-ctrls", NULL, S_CTRLS_TEXT, S_CTRLS_LONGTEXT, true ) change_safe() 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( "v4l", "v4l2" ) set_capability( "access_demux", 0 ) set_callbacks( DemuxOpen, DemuxClose ) add_submodule () add_shortcut( "v4l", "v4l2", "v4l2c" ) set_description( N_("Video4Linux compressed A/V input") ) set_capability( "access", 0 ) /* use these when open as access_demux fails; VLC will use another demux */ set_callbacks( AccessOpen, AccessClose ) add_submodule () add_shortcut ("radio" /*, "fm", "am" */) set_description (N_("Video4Linux radio tuner")) set_capability ("access_demux", 0) set_callbacks (RadioOpen, RadioClose) vlc_module_end () /** * Parses a V4L2 MRL into VLC object variables. */ void ParseMRL( vlc_object_t *obj, const char *mrl ) { const char *p = strchr( mrl, ':' ); char *dev = NULL; if( p != NULL ) { var_LocationParse( obj, p + 1, CFG_PREFIX ); if( p > mrl ) dev = strndup( mrl, p - mrl ); } else { if( mrl[0] ) dev = strdup( mrl ); } if( dev != NULL ) { var_Create( obj, CFG_PREFIX"dev", VLC_VAR_STRING ); var_SetString( obj, CFG_PREFIX"dev", dev ); free( dev ); } } int OpenDevice (vlc_object_t *obj, const char *path, uint32_t *restrict caps) { msg_Dbg (obj, "opening device '%s'", path); int rawfd = vlc_open (path, O_RDWR); if (rawfd == -1) { msg_Err (obj, "cannot open device '%s': %s", path, vlc_strerror_c(errno)); return -1; } int fd = v4l2_fd_open (rawfd, 0); if (fd == -1) { msg_Warn (obj, "cannot initialize user-space library: %s", vlc_strerror_c(errno)); /* fallback to direct kernel mode anyway */ fd = rawfd; } /* Get device capabilities */ struct v4l2_capability cap; if (v4l2_ioctl (fd, VIDIOC_QUERYCAP, &cap) < 0) { msg_Err (obj, "cannot get device capabilities: %s", vlc_strerror_c(errno)); v4l2_close (fd); return -1; } msg_Dbg (obj, "device %s using driver %s (version %u.%u.%u) on %s", cap.card, cap.driver, (cap.version >> 16) & 0xFF, (cap.version >> 8) & 0xFF, cap.version & 0xFF, cap.bus_info); if (cap.capabilities & V4L2_CAP_DEVICE_CAPS) { msg_Dbg (obj, " with capabilities 0x%08"PRIX32" " "(overall 0x%08"PRIX32")", cap.device_caps, cap.capabilities); *caps = cap.device_caps; } else { msg_Dbg (obj, " with unknown capabilities " "(overall 0x%08"PRIX32")", cap.capabilities); *caps = cap.capabilities; } return fd; } v4l2_std_id var_InheritStandard (vlc_object_t *obj, const char *varname) { char *name = var_InheritString (obj, varname); if (name == NULL) return V4L2_STD_UNKNOWN; const size_t n = sizeof (standards_vlc) / sizeof (*standards_vlc); static_assert (sizeof (standards_vlc) / sizeof (*standards_vlc) == sizeof (standards_v4l2) / sizeof (*standards_v4l2), "Inconsistent standards tables"); static_assert (sizeof (standards_vlc) / sizeof (*standards_vlc) == sizeof (standards_user) / sizeof (*standards_user), "Inconsistent standards tables"); for (size_t i = 0; i < n; i++) if (strcasecmp (name, standards_vlc[i]) == 0) { free (name); return standards_v4l2[i]; } /* Backward compatibility with old versions using V4L2 magic numbers */ char *end; v4l2_std_id std = strtoull (name, &end, 0); if (*end != '\0') { msg_Err (obj, "unknown video standard \"%s\"", name); std = V4L2_STD_UNKNOWN; } free (name); return std; }