mirror of https://git.ffmpeg.org/ffmpeg.git
239 lines
10 KiB
C
239 lines
10 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_CHANNEL_LAYOUT_H
|
|
#define AVUTIL_CHANNEL_LAYOUT_H
|
|
|
|
#include <stdint.h>
|
|
|
|
/**
|
|
* @file
|
|
* audio channel layout utility functions
|
|
*/
|
|
|
|
/**
|
|
* @addtogroup lavu_audio
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @defgroup channel_masks Audio channel masks
|
|
*
|
|
* A channel layout is a 64-bits integer with a bit set for every channel.
|
|
* The number of bits set must be equal to the number of channels.
|
|
* The value 0 means that the channel layout is not known.
|
|
* @note this data structure is not powerful enough to handle channels
|
|
* combinations that have the same channel multiple times, such as
|
|
* dual-mono.
|
|
*
|
|
* @{
|
|
*/
|
|
#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
|
|
#define AV_CH_LOW_FREQUENCY_2 0x0000000800000000ULL
|
|
#define AV_CH_TOP_SIDE_LEFT 0x0000001000000000ULL
|
|
#define AV_CH_TOP_SIDE_RIGHT 0x0000002000000000ULL
|
|
#define AV_CH_BOTTOM_FRONT_CENTER 0x0000004000000000ULL
|
|
#define AV_CH_BOTTOM_FRONT_LEFT 0x0000008000000000ULL
|
|
#define AV_CH_BOTTOM_FRONT_RIGHT 0x0000010000000000ULL
|
|
|
|
/** 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 layouts
|
|
* @{
|
|
* */
|
|
#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_HEXADECAGONAL (AV_CH_LAYOUT_OCTAGONAL|AV_CH_WIDE_LEFT|AV_CH_WIDE_RIGHT|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT|AV_CH_TOP_BACK_CENTER|AV_CH_TOP_FRONT_CENTER|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT)
|
|
#define AV_CH_LAYOUT_STEREO_DOWNMIX (AV_CH_STEREO_LEFT|AV_CH_STEREO_RIGHT)
|
|
#define AV_CH_LAYOUT_22POINT2 (AV_CH_LAYOUT_5POINT1_BACK|AV_CH_FRONT_LEFT_OF_CENTER|AV_CH_FRONT_RIGHT_OF_CENTER|AV_CH_BACK_CENTER|AV_CH_LOW_FREQUENCY_2|AV_CH_SIDE_LEFT|AV_CH_SIDE_RIGHT|AV_CH_TOP_FRONT_LEFT|AV_CH_TOP_FRONT_RIGHT|AV_CH_TOP_FRONT_CENTER|AV_CH_TOP_CENTER|AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_RIGHT|AV_CH_TOP_SIDE_LEFT|AV_CH_TOP_SIDE_RIGHT|AV_CH_TOP_BACK_CENTER|AV_CH_BOTTOM_FRONT_CENTER|AV_CH_BOTTOM_FRONT_LEFT|AV_CH_BOTTOM_FRONT_RIGHT)
|
|
|
|
enum AVMatrixEncoding {
|
|
AV_MATRIX_ENCODING_NONE,
|
|
AV_MATRIX_ENCODING_DOLBY,
|
|
AV_MATRIX_ENCODING_DPLII,
|
|
AV_MATRIX_ENCODING_DPLIIX,
|
|
AV_MATRIX_ENCODING_DPLIIZ,
|
|
AV_MATRIX_ENCODING_DOLBYEX,
|
|
AV_MATRIX_ENCODING_DOLBYHEADPHONE,
|
|
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, 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" = "2c+FC" = "2c+1c" = "0x7"
|
|
*/
|
|
uint64_t av_get_channel_layout(const char *name);
|
|
|
|
/**
|
|
* Return a channel layout and the number of channels based on the specified name.
|
|
*
|
|
* This function is similar to (@see av_get_channel_layout), but can also parse
|
|
* unknown channel layout specifications.
|
|
*
|
|
* @param[in] name channel layout specification string
|
|
* @param[out] channel_layout parsed channel layout (0 if unknown)
|
|
* @param[out] nb_channels number of channels
|
|
*
|
|
* @return 0 on success, AVERROR(EINVAL) if the parsing fails.
|
|
*/
|
|
int av_get_extended_channel_layout(const char *name, uint64_t* channel_layout, int* nb_channels);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
struct AVBPrint;
|
|
/**
|
|
* Append a description of a channel layout to a bprint buffer.
|
|
*/
|
|
void av_bprint_channel_layout(struct AVBPrint *bp, 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.
|
|
*/
|
|
int64_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);
|
|
|
|
/**
|
|
* Get the description of a given channel.
|
|
*
|
|
* @param channel a channel layout with a single channel
|
|
* @return channel description on success, NULL on error
|
|
*/
|
|
const char *av_get_channel_description(uint64_t channel);
|
|
|
|
/**
|
|
* Get the value and name of a standard channel layout.
|
|
*
|
|
* @param[in] index index in an internal list, starting at 0
|
|
* @param[out] layout channel layout mask
|
|
* @param[out] name name of the layout
|
|
* @return 0 if the layout exists,
|
|
* <0 if index is beyond the limits
|
|
*/
|
|
int av_get_standard_channel_layout(unsigned index, uint64_t *layout,
|
|
const char **name);
|
|
|
|
/**
|
|
* @}
|
|
* @}
|
|
*/
|
|
|
|
#endif /* AVUTIL_CHANNEL_LAYOUT_H */
|