a247ac640d
Given that the AVCodec.next pointer has now been removed, most of the AVCodecs are not modified at all any more and can therefore be made const (as this patch does); the only exceptions are the very few codecs for external libraries that have a init_static_data callback. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com> Signed-off-by: James Almer <jamrial@gmail.com>
164 lines
6.9 KiB
C
164 lines
6.9 KiB
C
/*
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* Float MPEG Audio decoder
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* Copyright (c) 2010 Michael Niedermayer
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#include "libavutil/samplefmt.h"
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#define USE_FLOATS 1
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#include "mpegaudio.h"
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#define SHR(a,b) ((a)*(1.0f/(1<<(b))))
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#define FIXR_OLD(a) ((int)((a) * FRAC_ONE + 0.5))
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#define FIXR(x) ((float)(x))
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#define FIXHR(x) ((float)(x))
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#define MULH3(x, y, s) ((s)*(y)*(x))
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#define MULLx(x, y, s) ((y)*(x))
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#define RENAME(a) a ## _float
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#define OUT_FMT AV_SAMPLE_FMT_FLT
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#define OUT_FMT_P AV_SAMPLE_FMT_FLTP
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/* Intensity stereo table. See commit b91d46614df189e7905538e7f5c4ed9c7ed0d274
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* (float based mp1/mp2/mp3 decoders.) for how they were created. */
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static const float is_table[2][16] = {
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{ 0.000000000000000000e+00, 2.113248705863952637e-01, 3.660253882408142090e-01,
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5.000000000000000000e-01, 6.339746117591857910e-01, 7.886751294136047363e-01,
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1.000000000000000000e+00 },
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{ 1.000000000000000000e+00, 7.886751294136047363e-01, 6.339746117591857910e-01,
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5.000000000000000000e-01, 3.660253882408142090e-01, 2.113248705863952637e-01,
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0.000000000000000000e+00 }
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};
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/* Antialiasing table. See commit 6f1ec38ce2193d3d4cacd87edb452c6d7ba751ec
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* (mpegaudio: clean up compute_antialias() definition) for how they were
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* created. */
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static const float csa_table[8][4] = {
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{ 8.574929237365722656e-01, -5.144957900047302246e-01,
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3.429971337318420410e-01, -1.371988654136657715e+00 },
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{ 8.817420005798339844e-01, -4.717319905757904053e-01,
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4.100100100040435791e-01, -1.353474020957946777e+00 },
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{ 9.496286511421203613e-01, -3.133774697780609131e-01,
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6.362511515617370605e-01, -1.263006091117858887e+00 },
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{ 9.833145737648010254e-01, -1.819131970405578613e-01,
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8.014013767242431641e-01, -1.165227770805358887e+00 },
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{ 9.955177903175354004e-01, -9.457419067621231079e-02,
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9.009436368942260742e-01, -1.090092062950134277e+00 },
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{ 9.991605877876281738e-01, -4.096558317542076111e-02,
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9.581949710845947266e-01, -1.040126085281372070e+00 },
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{ 9.998992085456848145e-01, -1.419856864959001541e-02,
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9.857006072998046875e-01, -1.014097809791564941e+00 },
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{ 9.999931454658508301e-01, -3.699974622577428818e-03,
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9.962931871414184570e-01, -1.003693103790283203e+00 }
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};
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#include "mpegaudiodec_template.c"
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#if CONFIG_MP1FLOAT_DECODER
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const AVCodec ff_mp1float_decoder = {
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.name = "mp1float",
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.long_name = NULL_IF_CONFIG_SMALL("MP1 (MPEG audio layer 1)"),
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.type = AVMEDIA_TYPE_AUDIO,
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.id = AV_CODEC_ID_MP1,
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.priv_data_size = sizeof(MPADecodeContext),
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.init = decode_init,
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.decode = decode_frame,
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.capabilities = AV_CODEC_CAP_CHANNEL_CONF |
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AV_CODEC_CAP_DR1,
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.flush = flush,
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.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
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AV_SAMPLE_FMT_FLT,
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AV_SAMPLE_FMT_NONE },
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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#endif
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#if CONFIG_MP2FLOAT_DECODER
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const AVCodec ff_mp2float_decoder = {
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.name = "mp2float",
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.long_name = NULL_IF_CONFIG_SMALL("MP2 (MPEG audio layer 2)"),
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.type = AVMEDIA_TYPE_AUDIO,
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.id = AV_CODEC_ID_MP2,
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.priv_data_size = sizeof(MPADecodeContext),
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.init = decode_init,
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.decode = decode_frame,
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.capabilities = AV_CODEC_CAP_CHANNEL_CONF |
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AV_CODEC_CAP_DR1,
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.flush = flush,
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.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
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AV_SAMPLE_FMT_FLT,
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AV_SAMPLE_FMT_NONE },
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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#endif
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#if CONFIG_MP3FLOAT_DECODER
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const AVCodec ff_mp3float_decoder = {
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.name = "mp3float",
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.long_name = NULL_IF_CONFIG_SMALL("MP3 (MPEG audio layer 3)"),
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.type = AVMEDIA_TYPE_AUDIO,
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.id = AV_CODEC_ID_MP3,
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.priv_data_size = sizeof(MPADecodeContext),
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.init = decode_init,
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.decode = decode_frame,
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.capabilities = AV_CODEC_CAP_CHANNEL_CONF |
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AV_CODEC_CAP_DR1,
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.flush = flush,
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.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
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AV_SAMPLE_FMT_FLT,
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AV_SAMPLE_FMT_NONE },
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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#endif
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#if CONFIG_MP3ADUFLOAT_DECODER
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const AVCodec ff_mp3adufloat_decoder = {
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.name = "mp3adufloat",
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.long_name = NULL_IF_CONFIG_SMALL("ADU (Application Data Unit) MP3 (MPEG audio layer 3)"),
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.type = AVMEDIA_TYPE_AUDIO,
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.id = AV_CODEC_ID_MP3ADU,
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.priv_data_size = sizeof(MPADecodeContext),
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.init = decode_init,
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.decode = decode_frame_adu,
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.capabilities = AV_CODEC_CAP_CHANNEL_CONF |
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AV_CODEC_CAP_DR1,
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.flush = flush,
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.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
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AV_SAMPLE_FMT_FLT,
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AV_SAMPLE_FMT_NONE },
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
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};
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#endif
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#if CONFIG_MP3ON4FLOAT_DECODER
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const AVCodec ff_mp3on4float_decoder = {
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.name = "mp3on4float",
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.long_name = NULL_IF_CONFIG_SMALL("MP3onMP4"),
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.type = AVMEDIA_TYPE_AUDIO,
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.id = AV_CODEC_ID_MP3ON4,
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.priv_data_size = sizeof(MP3On4DecodeContext),
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.init = decode_init_mp3on4,
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.close = decode_close_mp3on4,
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.decode = decode_frame_mp3on4,
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.capabilities = AV_CODEC_CAP_CHANNEL_CONF |
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AV_CODEC_CAP_DR1,
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.flush = flush_mp3on4,
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.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
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AV_SAMPLE_FMT_NONE },
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.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
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};
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#endif
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