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mpegaudiodec_float.c
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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,
50  .capabilities = CODEC_CAP_DR1,
51  .flush = flush,
52  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
55 };
56 #endif
57 #if CONFIG_MP2FLOAT_DECODER
58 AVCodec ff_mp2float_decoder = {
59  .name = "mp2float",
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,
66  .capabilities = CODEC_CAP_DR1,
67  .flush = flush,
68  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
71 };
72 #endif
73 #if CONFIG_MP3FLOAT_DECODER
74 AVCodec ff_mp3float_decoder = {
75  .name = "mp3float",
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,
82  .capabilities = CODEC_CAP_DR1,
83  .flush = flush,
84  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
87 };
88 #endif
89 #if CONFIG_MP3ADUFLOAT_DECODER
90 AVCodec ff_mp3adufloat_decoder = {
91  .name = "mp3adufloat",
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_FLTP,
103 };
104 #endif
105 #if CONFIG_MP3ON4FLOAT_DECODER
106 AVCodec ff_mp3on4float_decoder = {
107  .name = "mp3on4float",
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_FLTP,
119 };
120 #endif