blob: ad7ceb20b66c12cdf531a24c15b0a255164b2428
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) (((int)(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((int)(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 = AV_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 = AV_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 = AV_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 = AV_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 = AV_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 |
121 |