mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-27 01:42:20 +00:00
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
/*
|
|
* copyright (c) 2001 Fabrice Bellard
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* mpeg audio declarations for both encoder and decoder.
|
|
*/
|
|
|
|
#ifndef AVCODEC_MPEGAUDIO_H
|
|
#define AVCODEC_MPEGAUDIO_H
|
|
|
|
#ifndef CONFIG_FLOAT
|
|
# define CONFIG_FLOAT 0
|
|
#endif
|
|
|
|
#include <stdint.h>
|
|
|
|
/* max frame size, in samples */
|
|
#define MPA_FRAME_SIZE 1152
|
|
|
|
/* max compressed frame size */
|
|
#define MPA_MAX_CODED_FRAME_SIZE 1792
|
|
|
|
#define MPA_MAX_CHANNELS 2
|
|
|
|
#define SBLIMIT 32 /* number of subbands */
|
|
|
|
#define MPA_STEREO 0
|
|
#define MPA_JSTEREO 1
|
|
#define MPA_DUAL 2
|
|
#define MPA_MONO 3
|
|
|
|
#ifndef FRAC_BITS
|
|
#define FRAC_BITS 23 /* fractional bits for sb_samples and dct */
|
|
#define WFRAC_BITS 16 /* fractional bits for window */
|
|
#endif
|
|
|
|
#define FRAC_ONE (1 << FRAC_BITS)
|
|
|
|
#define FIX(a) ((int)((a) * FRAC_ONE))
|
|
|
|
#if CONFIG_FLOAT
|
|
# define INTFLOAT float
|
|
typedef float MPA_INT;
|
|
typedef float OUT_INT;
|
|
#elif FRAC_BITS <= 15
|
|
# define INTFLOAT int
|
|
typedef int16_t MPA_INT;
|
|
typedef int16_t OUT_INT;
|
|
#else
|
|
# define INTFLOAT int
|
|
typedef int32_t MPA_INT;
|
|
typedef int16_t OUT_INT;
|
|
#endif
|
|
|
|
int ff_mpa_l2_select_table(int bitrate, int nb_channels, int freq, int lsf);
|
|
|
|
#endif /* AVCODEC_MPEGAUDIO_H */
|