/*****************************************************************************
* video.c : Video4Linux2 input module for vlc
*****************************************************************************
- * Copyright (C) 2002-2009 the VideoLAN team
- * $Id$
+ * Copyright (C) 2002-2009 VLC authors and VideoLAN
+ * Copyright (C) 2011-2012 Rémi Denis-Courmont
*
* 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 Lesser General Public License as published by
+ * 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
+ * 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
* 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 <errno.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
-#include <poll.h>
#include <vlc_common.h>
-#include <vlc_plugin.h>
-#include <vlc_demux.h>
+#include <vlc_block.h>
#include "v4l2.h"
-/*****************************************************************************
- * Module descriptior
- *****************************************************************************/
-
-#define DEVICE_TEXT N_( "Device" )
-#define DEVICE_LONGTEXT N_( \
- "Video device (Default: /dev/video0)." )
-#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_( "Framerate" )
-#define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
- "(0 for autodetect)." )
-
-#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 N_( "Backlight compensation." )
-#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 (-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 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" )
-};
-
-#define V4L2_DEFAULT "/dev/video0"
-
-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_loadfile( CFG_PREFIX "dev", "/dev/video0",
- DEVICE_TEXT, DEVICE_LONGTEXT, false )
- change_safe()
- add_string( CFG_PREFIX "standard", "",
- STANDARD_TEXT, STANDARD_LONGTEXT, false )
- change_string_list( standards_vlc, standards_user, NULL )
- 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_float( CFG_PREFIX "fps", 0, FPS_TEXT, FPS_LONGTEXT, true )
- change_safe()
- add_obsolete_bool( CFG_PREFIX "use-libv4l2" ) /* since 2.1.0 */
-
- set_section( N_( "Tuner" ), NULL )
- 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( "v4l2" )
- set_capability( "access_demux", 0 )
- set_callbacks( DemuxOpen, DemuxClose )
-
- add_submodule ()
- add_shortcut( "v4l2", "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 block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t );
-
-/**
- * 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 );
- }
-}
-
-static 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;
-}
-
static int SetupStandard (vlc_object_t *obj, int fd,
- const struct v4l2_input *restrict input)
+ const struct v4l2_input *restrict input,
+ v4l2_std_id *restrict std)
{
-#ifdef V4L2_IN_CAP_STD
if (!(input->capabilities & V4L2_IN_CAP_STD))
{
msg_Dbg (obj, "no video standard selection");
+ *std = V4L2_STD_UNKNOWN;
return 0;
}
-#else
- (void) input;
- msg_Dbg (obj, "video standard selection unknown");
-#endif
- v4l2_std_id std = var_InheritStandard (obj, CFG_PREFIX"standard");
- if (std == V4L2_STD_UNKNOWN)
+
+ *std = var_InheritStandard (obj, CFG_PREFIX"standard");
+ if (*std == V4L2_STD_UNKNOWN)
{
msg_Warn (obj, "video standard not set");
+
+ /* Grab the currently selected standard */
+ if (v4l2_ioctl (fd, VIDIOC_G_STD, std) < 0)
+ msg_Err (obj, "cannot get video standard");
return 0;
}
- if (v4l2_ioctl (fd, VIDIOC_S_STD, &std) < 0)
+ if (v4l2_ioctl (fd, VIDIOC_S_STD, std) < 0)
{
- msg_Err (obj, "cannot set video standard 0x%"PRIx64": %m", std);
+ msg_Err (obj, "cannot set video standard 0x%"PRIx64": %s",
+ (uint64_t)*std, vlc_strerror_c(errno));
return -1;
}
- msg_Dbg (obj, "video standard set to 0x%"PRIx64":", std);
+ msg_Dbg (obj, "video standard set to 0x%"PRIx64":", (uint64_t)*std);
return 0;
}
if (v4l2_ioctl (fd, VIDIOC_ENUMAUDIO, &enumaudio) < 0)
{
- msg_Err (obj, "cannot get audio input %"PRIu32" properties: %m", idx);
+ msg_Err (obj, "cannot get audio input %"PRIu32" properties: %s", idx,
+ vlc_strerror_c(errno));
return -1;
}
if (v4l2_ioctl (fd, VIDIOC_S_AUDIO, &audio) < 0)
{
- msg_Err (obj, "cannot select audio input %"PRIu32": %m", idx);
+ msg_Err (obj, "cannot select audio input %"PRIu32": %s", idx,
+ vlc_strerror_c(errno));
return -1;
}
msg_Dbg (obj, "selected audio input %"PRIu32, idx);
return 0;
}
-static int SetupTuner (vlc_object_t *obj, int fd,
- const struct v4l2_input *restrict input)
+int SetupTuner (vlc_object_t *obj, int fd, uint32_t idx)
{
- switch (input->type)
- {
- case V4L2_INPUT_TYPE_TUNER:
- msg_Dbg (obj, "tuning required: tuner %"PRIu32, input->tuner);
- break;
- case V4L2_INPUT_TYPE_CAMERA:
- msg_Dbg (obj, "no tuning required (analog baseband input)");
- return 0;
- default:
- msg_Err (obj, "unknown input tuning type %"PRIu32, input->type);
- return 0; // hopefully we can stream regardless...
- }
-
- struct v4l2_tuner tuner = { .index = input->tuner };
+ struct v4l2_tuner tuner = { .index = idx };
if (v4l2_ioctl (fd, VIDIOC_G_TUNER, &tuner) < 0)
{
- msg_Err (obj, "cannot get tuner %"PRIu32" properties: %m",
- input->tuner);
+ msg_Err (obj, "cannot get tuner %"PRIu32" properties: %s", idx,
+ vlc_strerror_c(errno));
return -1;
}
msg_Dbg (obj, "tuner %s (%"PRIu32") is %s", tuner.name, tuner.index,
typename);
- msg_Dbg (obj, " ranges from %u.%u %sHz to %u.%c %sHz",
+ msg_Dbg (obj, " ranges from %u.%u %sHz to %u.%u %sHz",
(tuner.rangelow * 125) >> 1, (tuner.rangelow & 1) * 5, mult,
(tuner.rangehigh * 125) >> 1, (tuner.rangehigh & 1) * 5,
mult);
if (v4l2_ioctl (fd, VIDIOC_S_TUNER, &tuner) < 0)
{
- msg_Err (obj, "cannot set tuner %"PRIu32" audio mode: %m",
- input->tuner);
+ msg_Err (obj, "cannot set tuner %"PRIu32" audio mode: %s", idx,
+ vlc_strerror_c(errno));
return -1;
}
- msg_Dbg (obj, "tuner %"PRIu32" audio mode %u set", input->tuner,
- tuner.audmode);
+ msg_Dbg (obj, "tuner %"PRIu32" audio mode %u set", idx, tuner.audmode);
/* Tune to the requested frequency */
uint32_t freq = var_InheritInteger (obj, CFG_PREFIX"tuner-frequency");
if (freq != (uint32_t)-1)
{
struct v4l2_frequency frequency = {
- .tuner = input->tuner,
- .type = V4L2_TUNER_ANALOG_TV,
- .frequency = freq * 125 / 2
+ .tuner = idx,
+ .type = tuner.type,
+ .frequency = freq * 2 / 125,
};
if (v4l2_ioctl (fd, VIDIOC_S_FREQUENCY, &frequency) < 0)
{
- msg_Err (obj, "cannot tuner tuner %u to frequency %u %sHz: %m",
- input->tuner, freq, mult);
+ msg_Err (obj, "cannot tune tuner %"PRIu32
+ " to frequency %u %sHz: %s", idx, freq, mult,
+ vlc_strerror_c(errno));
return -1;
}
+ msg_Dbg (obj, "tuner %"PRIu32" tuned to frequency %"PRIu32" %sHz",
+ idx, freq, mult);
}
- msg_Dbg (obj, "tuner %"PRIu32" tuned to frequency %"PRIu32" %sHz",
- input->tuner, freq, mult);
+ else
+ msg_Dbg (obj, "tuner not tuned");
return 0;
}
* In practice, it does not. */
if (v4l2_ioctl (fd, VIDIOC_CROPCAP, &cropcap) < 0)
{
- msg_Warn (obj, "cannot get cropping properties: %m");
- return -1;
+ msg_Dbg (obj, "cannot get cropping properties: %s",
+ vlc_strerror_c(errno));
+ return 0;
}
/* Reset to the default cropping rectangle */
if (v4l2_ioctl (fd, VIDIOC_S_CROP, &crop) < 0)
{
- msg_Warn (obj, "cannot reset cropping limits: %m");
+ msg_Warn (obj, "cannot reset cropping limits: %s",
+ vlc_strerror_c(errno));
return -1;
}
return 0;
}
-int SetupInput (vlc_object_t *obj, int fd)
+int SetupInput (vlc_object_t *obj, int fd, v4l2_std_id *std)
{
struct v4l2_input input;
input.index = var_InheritInteger (obj, CFG_PREFIX"input");
if (v4l2_ioctl (fd, VIDIOC_ENUMINPUT, &input) < 0)
{
- msg_Err (obj, "invalid video input %"PRIu32": %m", input.index);
+ msg_Err (obj, "invalid video input %"PRIu32": %s", input.index,
+ vlc_strerror_c(errno));
return -1;
}
/* Select input */
if (v4l2_ioctl (fd, VIDIOC_S_INPUT, &input.index) < 0)
{
- msg_Err (obj, "cannot select input %"PRIu32": %m", input.index);
+ msg_Err (obj, "cannot select input %"PRIu32": %s", input.index,
+ vlc_strerror_c(errno));
return -1;
}
msg_Dbg (obj, "selected input %"PRIu32, input.index);
- SetupStandard (obj, fd, &input);
- SetupTuner (obj, fd, &input);
+ SetupStandard (obj, fd, &input, std);
+
+ switch (input.type)
+ {
+ case V4L2_INPUT_TYPE_TUNER:
+ msg_Dbg (obj, "tuning required: tuner %"PRIu32, input.tuner);
+ SetupTuner (obj, fd, input.tuner);
+ break;
+ case V4L2_INPUT_TYPE_CAMERA:
+ msg_Dbg (obj, "no tuning required (analog baseband input)");
+ break;
+ default:
+ msg_Err (obj, "unknown input tuning type %"PRIu32, input.type);
+ break; // hopefully we can stream regardless...
+ }
+
SetupAudio (obj, fd, &input);
return 0;
}
}
static const struct v4l2_fract infinity = { 1, 0 };
+static const struct v4l2_fract zero = { 0, 1 };
/**
- * Finds the highest frame rate possible of a certain V4L2 format.
+ * Finds the highest frame rate up to a specific limit possible with a certain
+ * V4L2 format.
* @param fmt V4L2 capture format [IN]
+ * @param min_it minimum frame internal [IN]
* @param it V4L2 frame interval [OUT]
* @return 0 on success, -1 on error.
*/
static int FindMaxRate (vlc_object_t *obj, int fd,
const struct v4l2_format *restrict fmt,
+ const struct v4l2_fract *restrict min_it,
struct v4l2_fract *restrict it)
{
struct v4l2_frmivalenum fie = {
if (v4l2_ioctl (fd, VIDIOC_ENUM_FRAMEINTERVALS, &fie) < 0)
{
- msg_Dbg (obj, " unknown frame intervals: %m");
+ msg_Dbg (obj, " unknown frame intervals: %s", vlc_strerror_c(errno));
/* Frame intervals cannot be enumerated. Set the format and then
* get the streaming parameters to figure out the default frame
* interval. This is not necessarily the maximum though. */
*it = infinity;
do
{
- if (fcmp (&fie.discrete, it) < 0)
+ if (fcmp (&fie.discrete, min_it) >= 0
+ && fcmp (&fie.discrete, it) < 0)
*it = fie.discrete;
fie.index++;
}
case V4L2_FRMIVAL_TYPE_STEPWISE:
case V4L2_FRMIVAL_TYPE_CONTINUOUS:
msg_Dbg (obj, " frame intervals from %"PRIu32"/%"PRIu32
- "to %"PRIu32"/%"PRIu32" supported",
+ " to %"PRIu32"/%"PRIu32" supported",
fie.stepwise.min.numerator, fie.stepwise.min.denominator,
fie.stepwise.max.numerator, fie.stepwise.max.denominator);
if (fie.type == V4L2_FRMIVAL_TYPE_STEPWISE)
msg_Dbg (obj, " with %"PRIu32"/%"PRIu32" step",
fie.stepwise.step.numerator,
fie.stepwise.step.denominator);
- *it = fie.stepwise.min;
+
+ if (fcmp (&fie.stepwise.max, min_it) < 0)
+ {
+ *it = infinity;
+ return -1;
+ }
+
+ if (fcmp (&fie.stepwise.min, min_it) >= 0)
+ {
+ *it = fie.stepwise.min;
+ break;
+ }
+
+ if (fie.type == V4L2_FRMIVAL_TYPE_CONTINUOUS)
+ {
+ *it = *min_it;
+ break;
+ }
+
+ it->numerator *= fie.stepwise.step.denominator;
+ it->denominator *= fie.stepwise.step.denominator;
+ while (fcmp (it, min_it) < 0)
+ it->numerator += fie.stepwise.step.numerator;
break;
}
return 0;
if (v4l2_ioctl (fd, VIDIOC_G_FMT, fmt) < 0)
{
- msg_Err (obj, "cannot get default format: %m");
+ msg_Err (obj, "cannot get default format: %s", vlc_strerror_c(errno));
return -1;
}
fmt->fmt.pix.pixelformat = fourcc;
struct v4l2_frmsizeenum fse = {
.pixel_format = fourcc,
};
- struct v4l2_fract best_it = infinity;
+ struct v4l2_fract best_it = infinity, min_it;
uint64_t best_area = 0;
+ if (var_InheritURational(obj, &min_it.denominator, &min_it.numerator,
+ CFG_PREFIX"fps") == VLC_SUCCESS)
+ msg_Dbg (obj, " requested frame internal: %"PRIu32"/%"PRIu32,
+ min_it.numerator, min_it.denominator);
+ else
+ min_it = zero;
+
uint32_t width = var_InheritInteger (obj, CFG_PREFIX"width");
uint32_t height = var_InheritInteger (obj, CFG_PREFIX"height");
if (width > 0 && height > 0)
fmt->fmt.pix.height = height;
msg_Dbg (obj, " requested frame size: %"PRIu32"x%"PRIu32,
width, height);
- FindMaxRate (obj, fd, fmt, &best_it);
+ FindMaxRate (obj, fd, fmt, &min_it, &best_it);
}
else
if (v4l2_ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &fse) < 0)
{
/* Fallback to current format, try to maximize frame rate */
- msg_Dbg (obj, " unknown frame sizes: %m");
+ msg_Dbg (obj, " unknown frame sizes: %s", vlc_strerror_c(errno));
msg_Dbg (obj, " current frame size: %"PRIu32"x%"PRIu32,
fmt->fmt.pix.width, fmt->fmt.pix.height);
- FindMaxRate (obj, fd, fmt, &best_it);
+ FindMaxRate (obj, fd, fmt, &min_it, &best_it);
}
else
switch (fse.type)
msg_Dbg (obj, " frame size %"PRIu32"x%"PRIu32,
fse.discrete.width, fse.discrete.height);
- FindMaxRate (obj, fd, fmt, &cur_it);
+ FindMaxRate (obj, fd, fmt, &min_it, &cur_it);
int64_t c = fcmp (&cur_it, &best_it);
uint64_t area = fse.discrete.width * fse.discrete.height;
{
struct v4l2_fract cur_it;
- FindMaxRate (obj, fd, fmt, &cur_it);
+ FindMaxRate (obj, fd, fmt, &min_it, &cur_it);
int64_t c = fcmp (&cur_it, &best_it);
uint64_t area = width * height;
/* Set the final format */
if (v4l2_ioctl (fd, VIDIOC_S_FMT, fmt) < 0)
{
- msg_Err (obj, "cannot set format: %m");
+ msg_Err (obj, "cannot set format: %s", vlc_strerror_c(errno));
return -1;
}
/* Now that the final format is set, fetch and override parameters */
if (v4l2_ioctl (fd, VIDIOC_G_PARM, parm) < 0)
{
- msg_Err (obj, "cannot get streaming parameters: %m");
- return -1;
+ msg_Err (obj, "cannot get streaming parameters: %s",
+ vlc_strerror_c(errno));
+ memset (parm, 0, sizeof (*parm));
+ parm->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
}
parm->parm.capture.capturemode = 0; /* normal video mode */
parm->parm.capture.extendedmode = 0;
if (best_it.denominator != 0)
parm->parm.capture.timeperframe = best_it;
if (v4l2_ioctl (fd, VIDIOC_S_PARM, parm) < 0)
- msg_Warn (obj, "cannot set streaming parameters: %m");
+ msg_Warn (obj, "cannot set streaming parameters: %s",
+ vlc_strerror_c(errno));
ResetCrop (obj, fd); /* crop depends on frame size */
return 0;
}
+mtime_t GetBufferPTS (const struct v4l2_buffer *buf)
+{
+ mtime_t pts;
+
+ switch (buf->flags & V4L2_BUF_FLAG_TIMESTAMP_MASK)
+ {
+ case V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC:
+ pts = (buf->timestamp.tv_sec * CLOCK_FREQ)
+ + buf->timestamp.tv_usec;
+ static_assert (CLOCK_FREQ == 1000000, "Clock unit mismatch");
+ break;
+ case V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN:
+ default:
+ pts = mdate ();
+ break;
+ }
+ return pts;
+}
/*****************************************************************************
* GrabVideo: Grab a video frame
*****************************************************************************/
-block_t* GrabVideo (vlc_object_t *demux, demux_sys_t *sys)
+block_t *GrabVideo (vlc_object_t *demux, int fd,
+ const struct buffer_t *restrict bufv)
{
struct v4l2_buffer buf = {
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
};
/* Wait for next frame */
- if (v4l2_ioctl (sys->i_fd, VIDIOC_DQBUF, &buf) < 0)
+ if (v4l2_ioctl (fd, VIDIOC_DQBUF, &buf) < 0)
{
switch (errno)
{
/* Could ignore EIO, see spec. */
/* fall through */
default:
- msg_Err (demux, "dequeue error: %m");
+ msg_Err (demux, "dequeue error: %s", vlc_strerror_c(errno));
return NULL;
}
}
- if (buf.index >= sys->i_nbuffers) {
- msg_Err (demux, "Failed capturing new frame as i>=nbuffers");
- return NULL;
- }
-
- block_t *block = ProcessVideoFrame(demux, sys->p_buffers[buf.index].start,
- buf.bytesused);
- if (block == NULL)
+ /* Copy frame */
+ block_t *block = block_Alloc (buf.bytesused);
+ if (unlikely(block == NULL))
return NULL;
+ block->i_pts = block->i_dts = GetBufferPTS (&buf);
+ memcpy (block->p_buffer, bufv[buf.index].start, buf.bytesused);
/* Unlock */
- if (v4l2_ioctl (sys->i_fd, VIDIOC_QBUF, &buf) < 0)
+ if (v4l2_ioctl (fd, VIDIOC_QBUF, &buf) < 0)
{
- msg_Err (demux, "queue error: %m");
+ msg_Err (demux, "queue error: %s", vlc_strerror_c(errno));
block_Release (block);
return NULL;
}
return 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 )
+/**
+ * Allocates user pointer buffers, and start streaming.
+ */
+int StartUserPtr (vlc_object_t *obj, int fd)
{
- block_t *p_block;
-
- if( !p_frame ) return NULL;
+ struct v4l2_requestbuffers reqbuf = {
+ .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ .memory = V4L2_MEMORY_USERPTR,
+ .count = 2,
+ };
- /* New block */
- if( !( p_block = block_New( p_demux, i_size ) ) )
+ if (v4l2_ioctl (fd, VIDIOC_REQBUFS, &reqbuf) < 0)
{
- msg_Warn( p_demux, "Cannot get new block" );
- return NULL;
+ msg_Dbg (obj, "cannot reserve user buffers: %s",
+ vlc_strerror_c(errno));
+ return -1;
}
-
- /* Copy frame */
- memcpy( p_block->p_buffer, p_frame, i_size );
-
- return p_block;
+ if (v4l2_ioctl (fd, VIDIOC_STREAMON, &reqbuf.type) < 0)
+ {
+ msg_Err (obj, "cannot start streaming: %s", vlc_strerror_c(errno));
+ return -1;
+ }
+ return 0;
}
-/*****************************************************************************
- * Helper function to initalise video IO using the mmap method
- *****************************************************************************/
-int InitMmap( vlc_object_t *p_demux, demux_sys_t *p_sys, int i_fd )
+/**
+ * Allocates memory-mapped buffers, queues them and start streaming.
+ * @param n requested buffers count [IN], allocated buffers count [OUT]
+ * @return array of allocated buffers (use free()), or NULL on error.
+ */
+struct buffer_t *StartMmap (vlc_object_t *obj, int fd, uint32_t *restrict n)
{
- struct v4l2_requestbuffers req;
-
- memset( &req, 0, sizeof(req) );
- req.count = 4;
- req.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- req.memory = V4L2_MEMORY_MMAP;
+ struct v4l2_requestbuffers req = {
+ .count = *n,
+ .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ .memory = V4L2_MEMORY_MMAP,
+ };
- if( v4l2_ioctl( i_fd, VIDIOC_REQBUFS, &req ) < 0 )
+ if (v4l2_ioctl (fd, VIDIOC_REQBUFS, &req) < 0)
{
- msg_Err( p_demux, "device does not support mmap I/O" );
- return -1;
+ msg_Err (obj, "cannot allocate buffers: %s", vlc_strerror_c(errno));
+ return NULL;
}
- if( req.count < 2 )
+ if (req.count < 2)
{
- msg_Err( p_demux, "insufficient buffers" );
- return -1;
+ msg_Err (obj, "cannot allocate enough buffers");
+ return NULL;
}
- p_sys->p_buffers = calloc( req.count, sizeof( *p_sys->p_buffers ) );
- if( unlikely(!p_sys->p_buffers) )
- return -1;
+ struct buffer_t *bufv = malloc (req.count * sizeof (*bufv));
+ if (unlikely(bufv == NULL))
+ return NULL;
- for( p_sys->i_nbuffers = 0; p_sys->i_nbuffers < req.count; ++p_sys->i_nbuffers )
+ uint32_t bufc = 0;
+ while (bufc < req.count)
{
- 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;
+ struct v4l2_buffer buf = {
+ .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ .memory = V4L2_MEMORY_MMAP,
+ .index = bufc,
+ };
- if( v4l2_ioctl( i_fd, VIDIOC_QUERYBUF, &buf ) < 0 )
+ if (v4l2_ioctl (fd, VIDIOC_QUERYBUF, &buf) < 0)
{
- msg_Err( p_demux, "VIDIOC_QUERYBUF: %m" );
- return -1;
+ msg_Err (obj, "cannot query buffer %"PRIu32": %s", bufc,
+ vlc_strerror_c(errno));
+ goto error;
}
- 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 );
+ bufv[bufc].start = v4l2_mmap (NULL, buf.length, PROT_READ | PROT_WRITE,
+ MAP_SHARED, fd, buf.m.offset);
+ if (bufv[bufc].start == MAP_FAILED)
+ {
+ msg_Err (obj, "cannot map buffer %"PRIu32": %s", bufc,
+ vlc_strerror_c(errno));
+ goto error;
+ }
+ bufv[bufc].length = buf.length;
+ bufc++;
- if( p_sys->p_buffers[p_sys->i_nbuffers].start == MAP_FAILED )
+ /* Some drivers refuse to queue buffers before they are mapped. Bug? */
+ if (v4l2_ioctl (fd, VIDIOC_QBUF, &buf) < 0)
{
- msg_Err( p_demux, "mmap failed: %m" );
- return -1;
+ msg_Err (obj, "cannot queue buffer %"PRIu32": %s", bufc,
+ vlc_strerror_c(errno));
+ goto error;
}
}
- return 0;
+ enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ if (v4l2_ioctl (fd, VIDIOC_STREAMON, &type) < 0)
+ {
+ msg_Err (obj, "cannot start streaming: %s", vlc_strerror_c(errno));
+ goto error;
+ }
+ *n = bufc;
+ return bufv;
+error:
+ StopMmap (fd, bufv, bufc);
+ return NULL;
+}
+
+void StopMmap (int fd, struct buffer_t *bufv, uint32_t bufc)
+{
+ enum v4l2_buf_type type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ /* STREAMOFF implicitly dequeues all buffers */
+ v4l2_ioctl (fd, VIDIOC_STREAMOFF, &type);
+ for (uint32_t i = 0; i < bufc; i++)
+ v4l2_munmap (bufv[i].start, bufv[i].length);
+ free (bufv);
}
projects / vlc / blobdiff