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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 |