ffmpeg/libavcodec/mpegaudiodec_float.c

   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,
  49     .close          = decode_close,
  50     .decode         = decode_frame,
  51     .capabilities   = CODEC_CAP_DR1,
  52     .flush          = flush,
  53     .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
  54                                                       AV_SAMPLE_FMT_FLT,
  55                                                       AV_SAMPLE_FMT_NONE },
  56 };
  57 #endif
  58 #if CONFIG_MP2FLOAT_DECODER
  59 AVCodec ff_mp2float_decoder = {
  60     .name           = "mp2float",
  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),
  65     .init           = decode_init,
  66     .decode         = decode_frame,
  67     .close          = decode_close,
  68     .capabilities   = CODEC_CAP_DR1,
  69     .flush          = flush,
  70     .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
  71                                                       AV_SAMPLE_FMT_FLT,
  72                                                       AV_SAMPLE_FMT_NONE },
  73 };
  74 #endif
  75 #if CONFIG_MP3FLOAT_DECODER
  76 AVCodec ff_mp3float_decoder = {
  77     .name           = "mp3float",
  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),
  82     .init           = decode_init,
  83     .close          = decode_close,
  84     .decode         = decode_frame,
  85     .capabilities   = CODEC_CAP_DR1,
  86     .flush          = flush,
  87     .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
  88                                                       AV_SAMPLE_FMT_FLT,
  89                                                       AV_SAMPLE_FMT_NONE },
  90 };
  91 #endif
  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),
  99     .init           = decode_init,
 100     .close          = decode_close,
 101     .decode         = decode_frame_adu,
 102     .capabilities   = CODEC_CAP_DR1,
 103     .flush          = flush,
 104     .sample_fmts    = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
 105                                                       AV_SAMPLE_FMT_FLT,
 106                                                       AV_SAMPLE_FMT_NONE },
 107 };
 108 #endif
 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 },
 123 };
 124 #endif