mirror of
https://github.com/opencv/opencv.git
synced 2024-12-09 13:23:57 +08:00
96 lines
4.2 KiB
C
96 lines
4.2 KiB
C
|
/*
|
||
|
* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
|
||
|
* Copyright (c) 2008 Peter Ross
|
||
|
*
|
||
|
* This file is part of FFmpeg.
|
||
|
*
|
||
|
* FFmpeg 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.
|
||
|
*
|
||
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
||
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
*/
|
||
|
|
||
|
#ifndef AVUTIL_AUDIOCONVERT_H
|
||
|
#define AVUTIL_AUDIOCONVERT_H
|
||
|
|
||
|
#include <stdint.h>
|
||
|
|
||
|
/**
|
||
|
* @file
|
||
|
* audio conversion routines
|
||
|
*/
|
||
|
|
||
|
/* Audio channel masks */
|
||
|
#define AV_CH_FRONT_LEFT 0x00000001
|
||
|
#define AV_CH_FRONT_RIGHT 0x00000002
|
||
|
#define AV_CH_FRONT_CENTER 0x00000004
|
||
|
#define AV_CH_LOW_FREQUENCY 0x00000008
|
||
|
#define AV_CH_BACK_LEFT 0x00000010
|
||
|
#define AV_CH_BACK_RIGHT 0x00000020
|
||
|
#define AV_CH_FRONT_LEFT_OF_CENTER 0x00000040
|
||
|
#define AV_CH_FRONT_RIGHT_OF_CENTER 0x00000080
|
||
|
#define AV_CH_BACK_CENTER 0x00000100
|
||
|
#define AV_CH_SIDE_LEFT 0x00000200
|
||
|
#define AV_CH_SIDE_RIGHT 0x00000400
|
||
|
#define AV_CH_TOP_CENTER 0x00000800
|
||
|
#define AV_CH_TOP_FRONT_LEFT 0x00001000
|
||
|
#define AV_CH_TOP_FRONT_CENTER 0x00002000
|
||
|
#define AV_CH_TOP_FRONT_RIGHT 0x00004000
|
||
|
#define AV_CH_TOP_BACK_LEFT 0x00008000
|
||
|
#define AV_CH_TOP_BACK_CENTER 0x00010000
|
||
|
#define AV_CH_TOP_BACK_RIGHT 0x00020000
|
||
|
#define AV_CH_STEREO_LEFT 0x20000000 ///< Stereo downmix.
|
||
|
#define AV_CH_STEREO_RIGHT 0x40000000 ///< See AV_CH_STEREO_LEFT.
|
||
|
|
||
|
/** Channel mask value used for AVCodecContext.request_channel_layout
|
||
|
to indicate that the user requests the channel order of the decoder output
|
||
|
to be the native codec channel order. */
|
||
|
#define AV_CH_LAYOUT_NATIVE 0x8000000000000000LL
|
||
|
|
||
|
/* Audio channel convenience macros */
|
||
|
#define AV_CH_LAYOUT_MONO (AV_CH_FRONT_CENTER)
|
||
|
#define AV_CH_LAYOUT_STEREO (AV_CH_FRONT_LEFT|AV_CH_FRONT_RIGHT)
|
||
|
#define AV_CH_LAYOUT_2_1 (AV_CH_LAYOUT_STEREO|AV_CH_BACK_CENTER)
|
||
|
#define AV_CH_LAYOUT_SURROUND (AV_CH_LAYOUT_STEREO|AV_CH_FRONT_CENTER)
|
||
|
#define AV_CH_LAYOUT_4POINT0 (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_CENTER)
|
||
|
#define AV_CH_LAYOUT_2_2 (AV_CH_LAYOUT_STEREO|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
|
||
|
#define AV_CH_LAYOUT_QUAD (AV_CH_LAYOUT_STEREO|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
|
||
|
#define AV_CH_LAYOUT_5POINT0 (AV_CH_LAYOUT_SURROUND|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT)
|
||
|
#define AV_CH_LAYOUT_5POINT1 (AV_CH_LAYOUT_5POINT0|AV_CH_LOW_FREQUENCY)
|
||
|
#define AV_CH_LAYOUT_5POINT0_BACK (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
|
||
|
#define AV_CH_LAYOUT_5POINT1_BACK (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_LOW_FREQUENCY)
|
||
|
#define AV_CH_LAYOUT_7POINT0 (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
|
||
|
#define AV_CH_LAYOUT_7POINT1 (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_LEFT|AV_CH_BACK_RIGHT)
|
||
|
#define AV_CH_LAYOUT_7POINT1_WIDE (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
|
||
|
#define AV_CH_LAYOUT_STEREO_DOWNMIX (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT)
|
||
|
|
||
|
/**
|
||
|
* Return a channel layout id that matches name, 0 if no match.
|
||
|
*/
|
||
|
int64_t av_get_channel_layout(const char *name);
|
||
|
|
||
|
/**
|
||
|
* Return a description of a channel layout.
|
||
|
* If nb_channels is <= 0, it is guessed from the channel_layout.
|
||
|
*
|
||
|
* @param buf put here the string containing the channel layout
|
||
|
* @param buf_size size in bytes of the buffer
|
||
|
*/
|
||
|
void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, int64_t channel_layout);
|
||
|
|
||
|
/**
|
||
|
* Return the number of channels in the channel layout.
|
||
|
*/
|
||
|
int av_get_channel_layout_nb_channels(int64_t channel_layout);
|
||
|
|
||
|
#endif /* AVUTIL_AUDIOCONVERT_H */
|