blob: ddfa5e0daaa28db98afb5b4c5d3e57ea8225bb45
1 | /* |
2 | * Float MPEG Audio decoder |
3 | * Copyright (c) 2010 Michael Niedermayer |
4 | * |
5 | * This file is part of FFmpeg. |
6 | * |
7 | * FFmpeg is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU Lesser General Public |
9 | * License as published by the Free Software Foundation; either |
10 | * version 2.1 of the License, or (at your option) any later version. |
11 | * |
12 | * FFmpeg is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * Lesser General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU Lesser General Public |
18 | * License along with FFmpeg; if not, write to the Free Software |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 | */ |
21 | |
22 | #include "config.h" |
23 | #include "libavutil/samplefmt.h" |
24 | |
25 | #define USE_FLOATS 1 |
26 | |
27 | #include "mpegaudio.h" |
28 | |
29 | #define SHR(a,b) ((a)*(1.0f/(1<<(b)))) |
30 | #define FIXR_OLD(a) ((int)((a) * FRAC_ONE + 0.5)) |
31 | #define FIXR(x) ((float)(x)) |
32 | #define FIXHR(x) ((float)(x)) |
33 | #define MULH3(x, y, s) ((s)*(y)*(x)) |
34 | #define MULLx(x, y, s) ((y)*(x)) |
35 | #define RENAME(a) a ## _float |
36 | #define OUT_FMT AV_SAMPLE_FMT_FLT |
37 | #define OUT_FMT_P AV_SAMPLE_FMT_FLTP |
38 | |
39 | #include "mpegaudiodec_template.c" |
40 | |
41 | #if CONFIG_MP1FLOAT_DECODER |
42 | AVCodec ff_mp1float_decoder = { |
43 | .name = "mp1float", |
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 | .close = decode_close, |
50 | .decode = decode_frame, |
51 | .capabilities = AV_CODEC_CAP_DR1, |
52 | .flush = flush, |
53 | .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, |
54 | AV_SAMPLE_FMT_FLT, |
55 | AV_SAMPLE_FMT_NONE }, |
56 | }; |
57 | #endif |
58 | #if CONFIG_MP2FLOAT_DECODER |
59 | AVCodec ff_mp2float_decoder = { |
60 | .name = "mp2float", |
61 | .long_name = NULL_IF_CONFIG_SMALL("MP2 (MPEG audio layer 2)"), |
62 | .type = AVMEDIA_TYPE_AUDIO, |
63 | .id = AV_CODEC_ID_MP2, |
64 | .priv_data_size = sizeof(MPADecodeContext), |
65 | .init = decode_init, |
66 | .decode = decode_frame, |
67 | .close = decode_close, |
68 | .capabilities = AV_CODEC_CAP_DR1, |
69 | .flush = flush, |
70 | .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, |
71 | AV_SAMPLE_FMT_FLT, |
72 | AV_SAMPLE_FMT_NONE }, |
73 | }; |
74 | #endif |
75 | #if CONFIG_MP3FLOAT_DECODER |
76 | AVCodec ff_mp3float_decoder = { |
77 | .name = "mp3float", |
78 | .long_name = NULL_IF_CONFIG_SMALL("MP3 (MPEG audio layer 3)"), |
79 | .type = AVMEDIA_TYPE_AUDIO, |
80 | .id = AV_CODEC_ID_MP3, |
81 | .priv_data_size = sizeof(MPADecodeContext), |
82 | .init = decode_init, |
83 | .close = decode_close, |
84 | .decode = decode_frame, |
85 | .capabilities = AV_CODEC_CAP_DR1, |
86 | .flush = flush, |
87 | .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, |
88 | AV_SAMPLE_FMT_FLT, |
89 | AV_SAMPLE_FMT_NONE }, |
90 | }; |
91 | #endif |
92 | #if CONFIG_MP3ADUFLOAT_DECODER |
93 | AVCodec ff_mp3adufloat_decoder = { |
94 | .name = "mp3adufloat", |
95 | .long_name = NULL_IF_CONFIG_SMALL("ADU (Application Data Unit) MP3 (MPEG audio layer 3)"), |
96 | .type = AVMEDIA_TYPE_AUDIO, |
97 | .id = AV_CODEC_ID_MP3ADU, |
98 | .priv_data_size = sizeof(MPADecodeContext), |
99 | .init = decode_init, |
100 | .close = decode_close, |
101 | .decode = decode_frame_adu, |
102 | .capabilities = AV_CODEC_CAP_DR1, |
103 | .flush = flush, |
104 | .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, |
105 | AV_SAMPLE_FMT_FLT, |
106 | AV_SAMPLE_FMT_NONE }, |
107 | }; |
108 | #endif |
109 | #if CONFIG_MP3ON4FLOAT_DECODER |
110 | AVCodec ff_mp3on4float_decoder = { |
111 | .name = "mp3on4float", |
112 | .long_name = NULL_IF_CONFIG_SMALL("MP3onMP4"), |
113 | .type = AVMEDIA_TYPE_AUDIO, |
114 | .id = AV_CODEC_ID_MP3ON4, |
115 | .priv_data_size = sizeof(MP3On4DecodeContext), |
116 | .init = decode_init_mp3on4, |
117 | .close = decode_close_mp3on4, |
118 | .decode = decode_frame_mp3on4, |
119 | .capabilities = AV_CODEC_CAP_DR1, |
120 | .flush = flush_mp3on4, |
121 | .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP, |
122 | AV_SAMPLE_FMT_NONE }, |
123 | }; |
124 | #endif |
125 |