2 * Fixed-point MPEG audio decoder
4 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavutil/samplefmt.h"
26 #include "mpegaudio.h"
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
39 #include "mpegaudiodec_template.c"
41 #if CONFIG_MP1_DECODER
42 AVCodec ff_mp1_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 .decode = decode_frame,
50 .capabilities = AV_CODEC_CAP_CHANNEL_CONF |
53 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
58 #if CONFIG_MP2_DECODER
59 AVCodec ff_mp2_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 .capabilities = AV_CODEC_CAP_CHANNEL_CONF |
70 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
75 #if CONFIG_MP3_DECODER
76 AVCodec ff_mp3_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 .decode = decode_frame,
84 .capabilities = AV_CODEC_CAP_CHANNEL_CONF |
87 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
92 #if CONFIG_MP3ADU_DECODER
93 AVCodec ff_mp3adu_decoder = {
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 .decode = decode_frame_adu,
101 .capabilities = AV_CODEC_CAP_CHANNEL_CONF |
104 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
106 AV_SAMPLE_FMT_NONE },
109 #if CONFIG_MP3ON4_DECODER
110 AVCodec ff_mp3on4_decoder = {
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_CHANNEL_CONF |
121 .flush = flush_mp3on4,
122 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P,
123 AV_SAMPLE_FMT_NONE },
124 .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,