mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-30 19:32:13 +00:00
105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
|
/*
|
||
|
|
* Common AC-3 definitions
|
||
|
|
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
|
||
|
|
*
|
||
|
|
* 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 AVCODEC_AC3DEFS_H
|
||
|
|
#define AVCODEC_AC3DEFS_H
|
||
|
|
|
||
|
|
#define EAC3_MAX_CHANNELS 16 /**< maximum number of channels in EAC3 */
|
||
|
|
#define AC3_MAX_CHANNELS 7 /**< maximum number of channels, including coupling channel */
|
||
|
|
#define CPL_CH 0 /**< coupling channel index */
|
||
|
|
|
||
|
|
#define AC3_MAX_COEFS 256
|
||
|
|
#define AC3_BLOCK_SIZE 256
|
||
|
|
#define AC3_MAX_BLOCKS 6
|
||
|
|
#define AC3_FRAME_SIZE (AC3_MAX_BLOCKS * 256)
|
||
|
|
#define AC3_WINDOW_SIZE (AC3_BLOCK_SIZE * 2)
|
||
|
|
#define AC3_CRITICAL_BANDS 50
|
||
|
|
#define AC3_MAX_CPL_BANDS 18
|
||
|
|
|
||
|
|
/* exponent encoding strategy */
|
||
|
|
#define EXP_REUSE 0
|
||
|
|
#define EXP_NEW 1
|
||
|
|
|
||
|
|
#define EXP_D15 1
|
||
|
|
#define EXP_D25 2
|
||
|
|
#define EXP_D45 3
|
||
|
|
|
||
|
|
/** Delta bit allocation strategy */
|
||
|
|
typedef enum {
|
||
|
|
DBA_REUSE = 0,
|
||
|
|
DBA_NEW,
|
||
|
|
DBA_NONE,
|
||
|
|
DBA_RESERVED
|
||
|
|
} AC3DeltaStrategy;
|
||
|
|
|
||
|
|
/** Channel mode (audio coding mode) */
|
||
|
|
typedef enum {
|
||
|
|
AC3_CHMODE_DUALMONO = 0,
|
||
|
|
AC3_CHMODE_MONO,
|
||
|
|
AC3_CHMODE_STEREO,
|
||
|
|
AC3_CHMODE_3F,
|
||
|
|
AC3_CHMODE_2F1R,
|
||
|
|
AC3_CHMODE_3F1R,
|
||
|
|
AC3_CHMODE_2F2R,
|
||
|
|
AC3_CHMODE_3F2R
|
||
|
|
} AC3ChannelMode;
|
||
|
|
|
||
|
|
/** Dolby Surround mode */
|
||
|
|
typedef enum AC3DolbySurroundMode {
|
||
|
|
AC3_DSURMOD_NOTINDICATED = 0,
|
||
|
|
AC3_DSURMOD_OFF,
|
||
|
|
AC3_DSURMOD_ON,
|
||
|
|
AC3_DSURMOD_RESERVED
|
||
|
|
} AC3DolbySurroundMode;
|
||
|
|
|
||
|
|
/** Dolby Surround EX mode */
|
||
|
|
typedef enum AC3DolbySurroundEXMode {
|
||
|
|
AC3_DSUREXMOD_NOTINDICATED = 0,
|
||
|
|
AC3_DSUREXMOD_OFF,
|
||
|
|
AC3_DSUREXMOD_ON,
|
||
|
|
AC3_DSUREXMOD_PLIIZ
|
||
|
|
} AC3DolbySurroundEXMode;
|
||
|
|
|
||
|
|
/** Dolby Headphone mode */
|
||
|
|
typedef enum AC3DolbyHeadphoneMode {
|
||
|
|
AC3_DHEADPHONMOD_NOTINDICATED = 0,
|
||
|
|
AC3_DHEADPHONMOD_OFF,
|
||
|
|
AC3_DHEADPHONMOD_ON,
|
||
|
|
AC3_DHEADPHONMOD_RESERVED
|
||
|
|
} AC3DolbyHeadphoneMode;
|
||
|
|
|
||
|
|
/** Preferred Stereo Downmix mode */
|
||
|
|
typedef enum AC3PreferredStereoDownmixMode {
|
||
|
|
AC3_DMIXMOD_NOTINDICATED = 0,
|
||
|
|
AC3_DMIXMOD_LTRT,
|
||
|
|
AC3_DMIXMOD_LORO,
|
||
|
|
AC3_DMIXMOD_DPLII // reserved value in A/52, but used by encoders to indicate DPL2
|
||
|
|
} AC3PreferredStereoDownmixMode;
|
||
|
|
|
||
|
|
typedef enum {
|
||
|
|
EAC3_FRAME_TYPE_INDEPENDENT = 0,
|
||
|
|
EAC3_FRAME_TYPE_DEPENDENT,
|
||
|
|
EAC3_FRAME_TYPE_AC3_CONVERT,
|
||
|
|
EAC3_FRAME_TYPE_RESERVED
|
||
|
|
} EAC3FrameType;
|
||
|
|
|
||
|
|
#endif /* AVCODEC_AC3DEFS_H */
|