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https://github.com/FFmpeg/FFmpeg.git
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121 lines
4.6 KiB
C
121 lines
4.6 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 Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 CONFIG_FLOAT 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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#include "mpegaudiodec_template.c"
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#if CONFIG_MP1FLOAT_DECODER
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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 = 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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};
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#endif
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#if CONFIG_MP2FLOAT_DECODER
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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 = 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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};
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#endif
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#if CONFIG_MP3FLOAT_DECODER
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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 = 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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};
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#endif
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#if CONFIG_MP3ADUFLOAT_DECODER
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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 = 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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};
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#endif
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#if CONFIG_MP3ON4FLOAT_DECODER
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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 = 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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};
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#endif
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