2 * Float MPEG Audio decoder
3 * Copyright (c) 2010 Michael Niedermayer
5 * This file is part of FFmpeg.
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.
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.
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
23 #include "libavutil/samplefmt.h"
27 #include "mpegaudio.h"
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
39 #include "mpegaudiodec_template.c"
41 #if CONFIG_MP1FLOAT_DECODER
42 AVCodec ff_mp1float_decoder
= {
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
),
49 .close
= decode_close
,
50 .decode
= decode_frame
,
51 .capabilities
= CODEC_CAP_DR1
,
53 .sample_fmts
= (const enum AVSampleFormat
[]) { AV_SAMPLE_FMT_FLTP
,
58 #if CONFIG_MP2FLOAT_DECODER
59 AVCodec ff_mp2float_decoder
= {
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
),
66 .decode
= decode_frame
,
67 .close
= decode_close
,
68 .capabilities
= CODEC_CAP_DR1
,
70 .sample_fmts
= (const enum AVSampleFormat
[]) { AV_SAMPLE_FMT_FLTP
,
75 #if CONFIG_MP3FLOAT_DECODER
76 AVCodec ff_mp3float_decoder
= {
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
),
83 .close
= decode_close
,
84 .decode
= decode_frame
,
85 .capabilities
= CODEC_CAP_DR1
,
87 .sample_fmts
= (const enum AVSampleFormat
[]) { AV_SAMPLE_FMT_FLTP
,
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
),
100 .close
= decode_close
,
101 .decode
= decode_frame_adu
,
102 .capabilities
= CODEC_CAP_DR1
,
104 .sample_fmts
= (const enum AVSampleFormat
[]) { AV_SAMPLE_FMT_FLTP
,
106 AV_SAMPLE_FMT_NONE
},
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
= CODEC_CAP_DR1
,
120 .flush
= flush_mp3on4
,
121 .sample_fmts
= (const enum AVSampleFormat
[]) { AV_SAMPLE_FMT_FLTP
,
122 AV_SAMPLE_FMT_NONE
},