| 1 | /* |
| 2 | * Fixed-point MPEG audio decoder |
| 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 | #include "config.h" |
| 22 | #include "libavutil/samplefmt.h" |
| 23 | |
| 24 | #define USE_FLOATS 0 |
| 25 | |
| 26 | #include "mpegaudio.h" |
| 27 | |
| 28 | #define SHR(a,b) ((a)>>(b)) |
| 29 | /* WARNING: only correct for positive numbers */ |
| 30 | #define FIXR_OLD(a) ((int)((a) * FRAC_ONE + 0.5)) |
| 31 | #define FIXR(a) ((int)((a) * FRAC_ONE + 0.5)) |
| 32 | #define FIXHR(a) ((int)((a) * (1LL<<32) + 0.5)) |
| 33 | #define MULH3(x, y, s) MULH((s)*(x), y) |
| 34 | #define MULLx(x, y, s) MULL(x,y,s) |
| 35 | #define RENAME(a) a ## _fixed |
| 36 | #define OUT_FMT AV_SAMPLE_FMT_S16 |
| 37 | #define OUT_FMT_P AV_SAMPLE_FMT_S16P |
| 38 | |
| 39 | #include "mpegaudiodec_template.c" |
| 40 | |
| 41 | #if CONFIG_MP1_DECODER |
| 42 | AVCodec ff_mp1_decoder = { |
| 43 | .name = "mp1", |
| 44 | .long_name = NULL_IF_CONFIG_SMALL("MP1 (MPEG audio layer 1)"), |
| 45 | .type = AVMEDIA_TYPE_AUDIO, |
| 46 | .id = AV_CODEC_ID_MP1, |
| 47 | .priv_data_size = sizeof(MPADecodeContext), |
| 48 | .init = decode_init, |
| 49 | .decode = decode_frame, |
| 50 | .capabilities = CODEC_CAP_DR1, |
| 51 | .flush = flush, |
| 52 | .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P, |
| 53 | AV_SAMPLE_FMT_S16, |
| 54 | AV_SAMPLE_FMT_NONE }, |
| 55 | }; |
| 56 | #endif |
| 57 | #if CONFIG_MP2_DECODER |
| 58 | AVCodec ff_mp2_decoder = { |
| 59 | .name = "mp2", |
| 60 | .long_name = NULL_IF_CONFIG_SMALL("MP2 (MPEG audio layer 2)"), |
| 61 | .type = AVMEDIA_TYPE_AUDIO, |
| 62 | .id = AV_CODEC_ID_MP2, |
| 63 | .priv_data_size = sizeof(MPADecodeContext), |
| 64 | .init = decode_init, |
| 65 | .decode = decode_frame, |
| 66 | .capabilities = CODEC_CAP_DR1, |
| 67 | .flush = flush, |
| 68 | .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P, |
| 69 | AV_SAMPLE_FMT_S16, |
| 70 | AV_SAMPLE_FMT_NONE }, |
| 71 | }; |
| 72 | #endif |
| 73 | #if CONFIG_MP3_DECODER |
| 74 | AVCodec ff_mp3_decoder = { |
| 75 | .name = "mp3", |
| 76 | .long_name = NULL_IF_CONFIG_SMALL("MP3 (MPEG audio layer 3)"), |
| 77 | .type = AVMEDIA_TYPE_AUDIO, |
| 78 | .id = AV_CODEC_ID_MP3, |
| 79 | .priv_data_size = sizeof(MPADecodeContext), |
| 80 | .init = decode_init, |
| 81 | .decode = decode_frame, |
| 82 | .capabilities = CODEC_CAP_DR1, |
| 83 | .flush = flush, |
| 84 | .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P, |
| 85 | AV_SAMPLE_FMT_S16, |
| 86 | AV_SAMPLE_FMT_NONE }, |
| 87 | }; |
| 88 | #endif |
| 89 | #if CONFIG_MP3ADU_DECODER |
| 90 | AVCodec ff_mp3adu_decoder = { |
| 91 | .name = "mp3adu", |
| 92 | .long_name = NULL_IF_CONFIG_SMALL("ADU (Application Data Unit) MP3 (MPEG audio layer 3)"), |
| 93 | .type = AVMEDIA_TYPE_AUDIO, |
| 94 | .id = AV_CODEC_ID_MP3ADU, |
| 95 | .priv_data_size = sizeof(MPADecodeContext), |
| 96 | .init = decode_init, |
| 97 | .decode = decode_frame_adu, |
| 98 | .capabilities = CODEC_CAP_DR1, |
| 99 | .flush = flush, |
| 100 | .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P, |
| 101 | AV_SAMPLE_FMT_S16, |
| 102 | AV_SAMPLE_FMT_NONE }, |
| 103 | }; |
| 104 | #endif |
| 105 | #if CONFIG_MP3ON4_DECODER |
| 106 | AVCodec ff_mp3on4_decoder = { |
| 107 | .name = "mp3on4", |
| 108 | .long_name = NULL_IF_CONFIG_SMALL("MP3onMP4"), |
| 109 | .type = AVMEDIA_TYPE_AUDIO, |
| 110 | .id = AV_CODEC_ID_MP3ON4, |
| 111 | .priv_data_size = sizeof(MP3On4DecodeContext), |
| 112 | .init = decode_init_mp3on4, |
| 113 | .close = decode_close_mp3on4, |
| 114 | .decode = decode_frame_mp3on4, |
| 115 | .capabilities = CODEC_CAP_DR1, |
| 116 | .flush = flush_mp3on4, |
| 117 | .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P, |
| 118 | AV_SAMPLE_FMT_NONE }, |
| 119 | }; |
| 120 | #endif |