mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
182 lines
7.3 KiB
C
182 lines
7.3 KiB
C
/*
|
|
* Copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
|
|
* Copyright (c) 2008 Peter Ross
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; 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
|
|
*/
|
|
|
|
/**
|
|
* @addtogroup lavu_audio
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @defgroup channel_masks 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.
|
|
#define AV_CH_WIDE_LEFT 0x0000000080000000ULL
|
|
#define AV_CH_WIDE_RIGHT 0x0000000100000000ULL
|
|
#define AV_CH_SURROUND_DIRECT_LEFT 0x0000000200000000ULL
|
|
#define AV_CH_SURROUND_DIRECT_RIGHT 0x0000000400000000ULL
|
|
|
|
/** 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 0x8000000000000000ULL
|
|
|
|
/**
|
|
* @}
|
|
* @defgroup channel_mask_c 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_2POINT1 (AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY)
|
|
#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_3POINT1 (AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY)
|
|
#define AV_CH_LAYOUT_4POINT0 (AV_CH_LAYOUT_SURROUND|AV_CH_BACK_CENTER)
|
|
#define AV_CH_LAYOUT_4POINT1 (AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY)
|
|
#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_6POINT0 (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_CENTER)
|
|
#define AV_CH_LAYOUT_6POINT0_FRONT (AV_CH_LAYOUT_2_2|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
|
|
#define AV_CH_LAYOUT_HEXAGONAL (AV_CH_LAYOUT_5POINT0_BACK|AV_CH_BACK_CENTER)
|
|
#define AV_CH_LAYOUT_6POINT1 (AV_CH_LAYOUT_5POINT1|AV_CH_BACK_CENTER)
|
|
#define AV_CH_LAYOUT_6POINT1_BACK (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_BACK_CENTER)
|
|
#define AV_CH_LAYOUT_6POINT1_FRONT (AV_CH_LAYOUT_6POINT0_FRONT|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_7POINT0_FRONT (AV_CH_LAYOUT_5POINT0|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
|
|
#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|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
|
|
#define AV_CH_LAYOUT_7POINT1_WIDE_BACK (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER)
|
|
#define AV_CH_LAYOUT_OCTAGONAL (AV_CH_LAYOUT_5POINT0|AV_CH_BACK_LEFT|AV_CH_BACK_CENTER|AV_CH_BACK_RIGHT)
|
|
#define AV_CH_LAYOUT_STEREO_DOWNMIX (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT)
|
|
|
|
enum AVMatrixEncoding {
|
|
AV_MATRIX_ENCODING_NONE,
|
|
AV_MATRIX_ENCODING_DOLBY,
|
|
AV_MATRIX_ENCODING_DPLII,
|
|
AV_MATRIX_ENCODING_NB
|
|
};
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* Return a channel layout id that matches name, or 0 if no match is found.
|
|
*
|
|
* name can be one or several of the following notations,
|
|
* separated by '+' or '|':
|
|
* - the name of an usual channel layout (mono, stereo, 4.0, quad, 5.0,
|
|
* 5.0(side), 5.1, 5.1(side), 7.1, 7.1(wide), downmix);
|
|
* - the name of a single channel (FL, FR, FC, LFE, BL, BR, FLC, FRC, BC,
|
|
* SL, SR, TC, TFL, TFC, TFR, TBL, TBC, TBR, DL, DR);
|
|
* - a number of channels, in decimal, optionally followed by 'c', yielding
|
|
* the default channel layout for that number of channels (@see
|
|
* av_get_default_channel_layout);
|
|
* - a channel layout mask, in hexadecimal starting with "0x" (see the
|
|
* AV_CH_* macros).
|
|
*
|
|
* Example: "stereo+FC" = "2+FC" = "2c+1c" = "0x7"
|
|
*/
|
|
uint64_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, uint64_t channel_layout);
|
|
|
|
/**
|
|
* Return the number of channels in the channel layout.
|
|
*/
|
|
int av_get_channel_layout_nb_channels(uint64_t channel_layout);
|
|
|
|
/**
|
|
* Return default channel layout for a given number of channels.
|
|
*/
|
|
uint64_t av_get_default_channel_layout(int nb_channels);
|
|
|
|
/**
|
|
* Get the index of a channel in channel_layout.
|
|
*
|
|
* @param channel a channel layout describing exactly one channel which must be
|
|
* present in channel_layout.
|
|
*
|
|
* @return index of channel in channel_layout on success, a negative AVERROR
|
|
* on error.
|
|
*/
|
|
int av_get_channel_layout_channel_index(uint64_t channel_layout,
|
|
uint64_t channel);
|
|
|
|
/**
|
|
* Get the channel with the given index in channel_layout.
|
|
*/
|
|
uint64_t av_channel_layout_extract_channel(uint64_t channel_layout, int index);
|
|
|
|
/**
|
|
* Get the name of a given channel.
|
|
*
|
|
* @return channel name on success, NULL on error.
|
|
*/
|
|
const char *av_get_channel_name(uint64_t channel);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /* AVUTIL_AUDIOCONVERT_H */
|