repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * copyright (c) 2001 Fabrice Bellard | |
| 3 | * | |
| 4 | * This file is part of FFmpeg. | |
| 5 | * | |
| 6 | * FFmpeg is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU Lesser General Public | |
| 8 | * License as published by the Free Software Foundation; either | |
| 9 | * version 2.1 of the License, or (at your option) any later version. | |
| 10 | * | |
| 11 | * FFmpeg is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | * Lesser General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU Lesser General Public | |
| 17 | * License along with FFmpeg; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 19 | */ | |
| 20 | ||
| 21 | /** | |
| 22 | * @file | |
| 23 | * mpeg audio declarations for both encoder and decoder. | |
| 24 | */ | |
| 25 | ||
| 26 | #ifndef AVCODEC_MPEGAUDIO_H | |
| 27 | #define AVCODEC_MPEGAUDIO_H | |
| 28 | ||
| 29 | #ifndef USE_FLOATS | |
| 30 | # define USE_FLOATS 0 | |
| 31 | #endif | |
| 32 | ||
| 33 | #include <stdint.h> | |
| 34 | ||
| 35 | /* max frame size, in samples */ | |
| 36 | #define MPA_FRAME_SIZE 1152 | |
| 37 | ||
| 38 | /* max compressed frame size */ | |
| 39 | #define MPA_MAX_CODED_FRAME_SIZE 1792 | |
| 40 | ||
| 41 | #define MPA_MAX_CHANNELS 2 | |
| 42 | ||
| 43 | #define SBLIMIT 32 /* number of subbands */ | |
| 44 | ||
| 45 | #define MPA_STEREO 0 | |
| 46 | #define MPA_JSTEREO 1 | |
| 47 | #define MPA_DUAL 2 | |
| 48 | #define MPA_MONO 3 | |
| 49 | ||
| 50 | #ifndef FRAC_BITS | |
| 51 | #define FRAC_BITS 23 /* fractional bits for sb_samples and dct */ | |
| 52 | #define WFRAC_BITS 16 /* fractional bits for window */ | |
| 53 | #endif | |
| 54 | ||
| 55 | #define IMDCT_SCALAR 1.759 | |
| 56 | ||
| 57 | #define FRAC_ONE (1 << FRAC_BITS) | |
| 58 | ||
| 59 | #define FIX(a) ((int)((a) * FRAC_ONE)) | |
| 60 | ||
| 61 | #if USE_FLOATS | |
| 62 | # define INTFLOAT float | |
| 63 | typedef float MPA_INT; | |
| 64 | typedef float OUT_INT; | |
| 65 | #elif FRAC_BITS <= 15 | |
| 66 | # define INTFLOAT int | |
| 67 | typedef int16_t MPA_INT; | |
| 68 | typedef int16_t OUT_INT; | |
| 69 | #else | |
| 70 | # define INTFLOAT int | |
| 71 | typedef int32_t MPA_INT; | |
| 72 | typedef int16_t OUT_INT; | |
| 73 | #endif | |
| 74 | ||
| 75 | int ff_mpa_l2_select_table(int bitrate, int nb_channels, int freq, int lsf); | |
| 76 | ||
| 77 | #endif /* AVCODEC_MPEGAUDIO_H */ |