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4ec0ccb1a4
Patch by Martin % marthi A graphics P cs P uni - sb P de % Original thread: date: Nov 20, 2006 6:20 PM subject: Re: [Ffmpeg-devel] [PATCH] Re: AMR bitrate Originally committed as revision 7139 to svn://svn.ffmpeg.org/ffmpeg/trunk
715 lines
18 KiB
C
715 lines
18 KiB
C
/*
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* AMR Audio decoder stub
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* Copyright (c) 2003 the ffmpeg project
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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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/*
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This code implements amr-nb and amr-wb audio encoder/decoder through external reference
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code from www.3gpp.org. The licence of the code from 3gpp is unclear so you
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have to download the code separately. Two versions exists: One fixed-point
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and one with floats. For some reason the float-encoder is significant faster
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atleast on a P4 1.5GHz (0.9s instead of 9.9s on a 30s audio clip at MR102).
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Both float and fixed point is supported for amr-nb, but only float for
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amr-wb.
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--AMR-NB--
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The fixed-point (TS26.073) can be downloaded from:
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http://www.3gpp.org/ftp/Specs/archive/26_series/26.073/26073-510.zip
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Extract the soure into ffmpeg/libavcodec/amr
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To use the fixed version run "./configure" with "--enable-amr_nb-fixed"
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The float version (default) can be downloaded from:
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http://www.3gpp.org/ftp/Specs/archive/26_series/26.104/26104-510.zip
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Extract the soure into ffmpeg/libavcodec/amr_float
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The specification for amr-nb can be found in TS 26.071
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(http://www.3gpp.org/ftp/Specs/html-info/26071.htm) and some other
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info at http://www.3gpp.org/ftp/Specs/html-info/26-series.htm
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--AMR-WB--
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The reference code can be downloaded from:
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http://www.3gpp.org/ftp/Specs/archive/26_series/26.204/26204-510.zip
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It should be extracted to "libavcodec/amrwb_float". Enable it with
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"--enable-amr_wb".
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The specification for amr-wb can be downloaded from:
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http://www.3gpp.org/ftp/Specs/archive/26_series/26.171/26171-500.zip
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If someone want to use the fixed point version it can be downloaded
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from: http://www.3gpp.org/ftp/Specs/archive/26_series/26.173/26173-571.zip
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*/
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#include "avcodec.h"
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#ifdef CONFIG_AMR_NB_FIXED
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#define MMS_IO
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#include "amr/sp_dec.h"
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#include "amr/d_homing.h"
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#include "amr/typedef.h"
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#include "amr/sp_enc.h"
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#include "amr/sid_sync.h"
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#include "amr/e_homing.h"
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#else
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#include "amr_float/interf_dec.h"
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#include "amr_float/interf_enc.h"
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#endif
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/* Common code for fixed and float version*/
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typedef struct AMR_bitrates
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{
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int startrate;
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int stoprate;
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enum Mode mode;
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} AMR_bitrates;
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/* Match desired bitrate with closest one*/
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static enum Mode getBitrateMode(int bitrate)
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{
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/* Adjusted so that all bitrates can be used from commandline where
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only a multiple of 1000 can be specified*/
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AMR_bitrates rates[]={ {0,4999,MR475}, //4
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{5000,5899,MR515},//5
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{5900,6699,MR59},//6
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{6700,7000,MR67},//7
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{7001,7949,MR74},//8
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{7950,9999,MR795},//9
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{10000,11999,MR102},//10
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{12000,64000,MR122},//12
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};
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int i;
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for(i=0;i<8;i++)
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{
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if(rates[i].startrate<=bitrate && rates[i].stoprate>=bitrate)
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{
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return(rates[i].mode);
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}
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}
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/*Return highest possible*/
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return(MR122);
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}
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static void amr_decode_fix_avctx(AVCodecContext * avctx)
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{
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const int is_amr_wb = 1 + (avctx->codec_id == CODEC_ID_AMR_WB);
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if(avctx->sample_rate == 0)
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{
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avctx->sample_rate = 8000 * is_amr_wb;
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}
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if(avctx->channels == 0)
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{
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avctx->channels = 1;
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}
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avctx->frame_size = 160 * is_amr_wb;
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}
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#ifdef CONFIG_AMR_NB_FIXED
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/* fixed point version*/
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/* frame size in serial bitstream file (frame type + serial stream + flags) */
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#define SERIAL_FRAMESIZE (1+MAX_SERIAL_SIZE+5)
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typedef struct AMRContext {
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int frameCount;
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Speech_Decode_FrameState *speech_decoder_state;
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enum RXFrameType rx_type;
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enum Mode mode;
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Word16 reset_flag;
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Word16 reset_flag_old;
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enum Mode enc_bitrate;
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Speech_Encode_FrameState *enstate;
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sid_syncState *sidstate;
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enum TXFrameType tx_frametype;
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} AMRContext;
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static int amr_nb_decode_init(AVCodecContext * avctx)
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{
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AMRContext *s = avctx->priv_data;
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s->frameCount=0;
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s->speech_decoder_state=NULL;
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s->rx_type = (enum RXFrameType)0;
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s->mode= (enum Mode)0;
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s->reset_flag=0;
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s->reset_flag_old=1;
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if(Speech_Decode_Frame_init(&s->speech_decoder_state, "Decoder"))
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{
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av_log(avctx, AV_LOG_ERROR, "Speech_Decode_Frame_init error\n");
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return -1;
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}
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amr_decode_fix_avctx(avctx);
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if(avctx->channels > 1)
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{
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av_log(avctx, AV_LOG_ERROR, "amr_nb: multichannel decoding not supported\n");
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return -1;
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}
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return 0;
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}
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static int amr_nb_encode_init(AVCodecContext * avctx)
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{
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AMRContext *s = avctx->priv_data;
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s->frameCount=0;
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s->speech_decoder_state=NULL;
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s->rx_type = (enum RXFrameType)0;
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s->mode= (enum Mode)0;
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s->reset_flag=0;
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s->reset_flag_old=1;
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if(avctx->sample_rate!=8000)
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{
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if(avctx->debug)
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{
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av_log(avctx, AV_LOG_DEBUG, "Only 8000Hz sample rate supported\n");
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}
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return -1;
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}
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if(avctx->channels!=1)
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{
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if(avctx->debug)
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{
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av_log(avctx, AV_LOG_DEBUG, "Only mono supported\n");
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}
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return -1;
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}
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avctx->frame_size=160;
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avctx->coded_frame= avcodec_alloc_frame();
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if(Speech_Encode_Frame_init(&s->enstate, 0, "encoder") || sid_sync_init (&s->sidstate))
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{
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if(avctx->debug)
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{
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av_log(avctx, AV_LOG_DEBUG, "Speech_Encode_Frame_init error\n");
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}
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return -1;
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}
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s->enc_bitrate=getBitrateMode(avctx->bit_rate);
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return 0;
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}
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static int amr_nb_encode_close(AVCodecContext * avctx)
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{
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AMRContext *s = avctx->priv_data;
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Speech_Encode_Frame_exit(&s->enstate);
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sid_sync_exit (&s->sidstate);
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av_freep(&avctx->coded_frame);
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return 0;
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}
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static int amr_nb_decode_close(AVCodecContext * avctx)
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{
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AMRContext *s = avctx->priv_data;
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Speech_Decode_Frame_exit(&s->speech_decoder_state);
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return 0;
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}
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static int amr_nb_decode_frame(AVCodecContext * avctx,
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void *data, int *data_size,
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uint8_t * buf, int buf_size)
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{
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AMRContext *s = avctx->priv_data;
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uint8_t*amrData=buf;
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int offset=0;
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UWord8 toc, q, ft;
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Word16 serial[SERIAL_FRAMESIZE]; /* coded bits */
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Word16 *synth;
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UWord8 *packed_bits;
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static Word16 packed_size[16] = {12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0};
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int i;
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//printf("amr_decode_frame data_size=%i buf=0x%X buf_size=%d frameCount=%d!!\n",*data_size,buf,buf_size,s->frameCount);
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synth=data;
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// while(offset<buf_size)
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{
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toc=amrData[offset];
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/* read rest of the frame based on ToC byte */
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q = (toc >> 2) & 0x01;
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ft = (toc >> 3) & 0x0F;
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//printf("offset=%d, packet_size=%d amrData= 0x%X %X %X %X\n",offset,packed_size[ft],amrData[offset],amrData[offset+1],amrData[offset+2],amrData[offset+3]);
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offset++;
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packed_bits=amrData+offset;
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offset+=packed_size[ft];
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//Unsort and unpack bits
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s->rx_type = UnpackBits(q, ft, packed_bits, &s->mode, &serial[1]);
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//We have a new frame
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s->frameCount++;
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if (s->rx_type == RX_NO_DATA)
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{
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s->mode = s->speech_decoder_state->prev_mode;
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}
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else {
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s->speech_decoder_state->prev_mode = s->mode;
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}
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/* if homed: check if this frame is another homing frame */
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if (s->reset_flag_old == 1)
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{
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/* only check until end of first subframe */
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s->reset_flag = decoder_homing_frame_test_first(&serial[1], s->mode);
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}
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/* produce encoder homing frame if homed & input=decoder homing frame */
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if ((s->reset_flag != 0) && (s->reset_flag_old != 0))
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{
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for (i = 0; i < L_FRAME; i++)
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{
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synth[i] = EHF_MASK;
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}
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}
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else
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{
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/* decode frame */
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Speech_Decode_Frame(s->speech_decoder_state, s->mode, &serial[1], s->rx_type, synth);
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}
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//Each AMR-frame results in 160 16-bit samples
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*data_size+=160*2;
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synth+=160;
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/* if not homed: check whether current frame is a homing frame */
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if (s->reset_flag_old == 0)
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{
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/* check whole frame */
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s->reset_flag = decoder_homing_frame_test(&serial[1], s->mode);
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}
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/* reset decoder if current frame is a homing frame */
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if (s->reset_flag != 0)
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{
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Speech_Decode_Frame_reset(s->speech_decoder_state);
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}
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s->reset_flag_old = s->reset_flag;
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}
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return offset;
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}
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static int amr_nb_encode_frame(AVCodecContext *avctx,
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unsigned char *frame/*out*/, int buf_size, void *data/*in*/)
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{
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short serial_data[250] = {0};
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AMRContext *s = avctx->priv_data;
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int written;
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s->reset_flag = encoder_homing_frame_test(data);
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Speech_Encode_Frame(s->enstate, s->enc_bitrate, data, &serial_data[1], &s->mode);
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/* add frame type and mode */
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sid_sync (s->sidstate, s->mode, &s->tx_frametype);
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written = PackBits(s->mode, s->enc_bitrate, s->tx_frametype, &serial_data[1], frame);
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if (s->reset_flag != 0)
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{
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Speech_Encode_Frame_reset(s->enstate);
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sid_sync_reset(s->sidstate);
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}
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return written;
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}
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#elif defined(CONFIG_AMR_NB) /* Float point version*/
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typedef struct AMRContext {
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int frameCount;
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void * decState;
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int *enstate;
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enum Mode enc_bitrate;
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} AMRContext;
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static int amr_nb_decode_init(AVCodecContext * avctx)
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{
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AMRContext *s = avctx->priv_data;
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s->frameCount=0;
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s->decState=Decoder_Interface_init();
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if(!s->decState)
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{
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av_log(avctx, AV_LOG_ERROR, "Decoder_Interface_init error\r\n");
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return -1;
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}
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amr_decode_fix_avctx(avctx);
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if(avctx->channels > 1)
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{
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av_log(avctx, AV_LOG_ERROR, "amr_nb: multichannel decoding not supported\n");
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return -1;
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}
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return 0;
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}
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static int amr_nb_encode_init(AVCodecContext * avctx)
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{
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AMRContext *s = avctx->priv_data;
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s->frameCount=0;
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if(avctx->sample_rate!=8000)
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{
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if(avctx->debug)
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{
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av_log(avctx, AV_LOG_DEBUG, "Only 8000Hz sample rate supported\n");
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}
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return -1;
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}
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if(avctx->channels!=1)
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{
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if(avctx->debug)
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{
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av_log(avctx, AV_LOG_DEBUG, "Only mono supported\n");
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}
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return -1;
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}
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avctx->frame_size=160;
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avctx->coded_frame= avcodec_alloc_frame();
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s->enstate=Encoder_Interface_init(0);
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if(!s->enstate)
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{
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if(avctx->debug)
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{
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av_log(avctx, AV_LOG_DEBUG, "Encoder_Interface_init error\n");
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}
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return -1;
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}
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s->enc_bitrate=getBitrateMode(avctx->bit_rate);
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return 0;
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}
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static int amr_nb_decode_close(AVCodecContext * avctx)
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{
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AMRContext *s = avctx->priv_data;
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Decoder_Interface_exit(s->decState);
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return 0;
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}
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static int amr_nb_encode_close(AVCodecContext * avctx)
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{
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AMRContext *s = avctx->priv_data;
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Encoder_Interface_exit(s->enstate);
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av_freep(&avctx->coded_frame);
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return 0;
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}
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static int amr_nb_decode_frame(AVCodecContext * avctx,
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void *data, int *data_size,
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uint8_t * buf, int buf_size)
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{
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AMRContext *s = (AMRContext*)avctx->priv_data;
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uint8_t*amrData=buf;
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static short block_size[16]={ 12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0 };
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enum Mode dec_mode;
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int packet_size;
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/* av_log(NULL,AV_LOG_DEBUG,"amr_decode_frame buf=%p buf_size=%d frameCount=%d!!\n",buf,buf_size,s->frameCount); */
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if(buf_size==0) {
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/* nothing to do */
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return 0;
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}
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dec_mode = (buf[0] >> 3) & 0x000F;
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packet_size = block_size[dec_mode]+1;
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if(packet_size > buf_size) {
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av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n", buf_size, packet_size);
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return -1;
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}
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s->frameCount++;
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/* av_log(NULL,AV_LOG_DEBUG,"packet_size=%d amrData= 0x%X %X %X %X\n",packet_size,amrData[0],amrData[1],amrData[2],amrData[3]); */
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/* call decoder */
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Decoder_Interface_Decode(s->decState, amrData, data, 0);
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*data_size=160*2;
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return packet_size;
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}
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static int amr_nb_encode_frame(AVCodecContext *avctx,
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unsigned char *frame/*out*/, int buf_size, void *data/*in*/)
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{
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AMRContext *s = (AMRContext*)avctx->priv_data;
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int written;
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s->enc_bitrate=getBitrateMode(avctx->bit_rate);
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written = Encoder_Interface_Encode(s->enstate,
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s->enc_bitrate,
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data,
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frame,
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0);
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/* av_log(NULL,AV_LOG_DEBUG,"amr_nb_encode_frame encoded %u bytes, bitrate %u, first byte was %#02x\n",written, s->enc_bitrate, frame[0] ); */
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return written;
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}
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#endif
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#if defined(CONFIG_AMR_NB) || defined(CONFIG_AMR_NB_FIXED)
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AVCodec amr_nb_decoder =
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{
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"amr_nb",
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CODEC_TYPE_AUDIO,
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CODEC_ID_AMR_NB,
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sizeof(AMRContext),
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amr_nb_decode_init,
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NULL,
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amr_nb_decode_close,
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amr_nb_decode_frame,
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};
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|
AVCodec amr_nb_encoder =
|
|
{
|
|
"amr_nb",
|
|
CODEC_TYPE_AUDIO,
|
|
CODEC_ID_AMR_NB,
|
|
sizeof(AMRContext),
|
|
amr_nb_encode_init,
|
|
amr_nb_encode_frame,
|
|
amr_nb_encode_close,
|
|
NULL,
|
|
};
|
|
|
|
#endif
|
|
|
|
/* -----------AMR wideband ------------*/
|
|
#ifdef CONFIG_AMR_WB
|
|
|
|
#ifdef _TYPEDEF_H
|
|
//To avoid duplicate typedefs from typdef in amr-nb
|
|
#define typedef_h
|
|
#endif
|
|
|
|
#include "amrwb_float/enc_if.h"
|
|
#include "amrwb_float/dec_if.h"
|
|
|
|
/* Common code for fixed and float version*/
|
|
typedef struct AMRWB_bitrates
|
|
{
|
|
int startrate;
|
|
int stoprate;
|
|
int mode;
|
|
|
|
} AMRWB_bitrates;
|
|
|
|
static int getWBBitrateMode(int bitrate)
|
|
{
|
|
/* Adjusted so that all bitrates can be used from commandline where
|
|
only a multiple of 1000 can be specified*/
|
|
AMRWB_bitrates rates[]={ {0,7999,0}, //6.6kHz
|
|
{8000,9999,1},//8.85
|
|
{10000,13000,2},//12.65
|
|
{13001,14999,3},//14.25
|
|
{15000,17000,4},//15.85
|
|
{17001,18000,5},//18.25
|
|
{18001,22000,6},//19.85
|
|
{22001,23000,7},//23.05
|
|
{23001,24000,8},//23.85
|
|
|
|
};
|
|
int i;
|
|
|
|
for(i=0;i<9;i++)
|
|
{
|
|
if(rates[i].startrate<=bitrate && rates[i].stoprate>=bitrate)
|
|
{
|
|
return(rates[i].mode);
|
|
}
|
|
}
|
|
/*Return highest possible*/
|
|
return(8);
|
|
}
|
|
|
|
|
|
typedef struct AMRWBContext {
|
|
int frameCount;
|
|
void *state;
|
|
int mode;
|
|
Word16 allow_dtx;
|
|
} AMRWBContext;
|
|
|
|
static int amr_wb_encode_init(AVCodecContext * avctx)
|
|
{
|
|
AMRWBContext *s = (AMRWBContext*)avctx->priv_data;
|
|
s->frameCount=0;
|
|
|
|
if(avctx->sample_rate!=16000)
|
|
{
|
|
if(avctx->debug)
|
|
{
|
|
av_log(avctx, AV_LOG_DEBUG, "Only 16000Hz sample rate supported\n");
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
if(avctx->channels!=1)
|
|
{
|
|
if(avctx->debug)
|
|
{
|
|
av_log(avctx, AV_LOG_DEBUG, "Only mono supported\n");
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
avctx->frame_size=320;
|
|
avctx->coded_frame= avcodec_alloc_frame();
|
|
|
|
s->state = E_IF_init();
|
|
s->mode=getWBBitrateMode(avctx->bit_rate);
|
|
s->allow_dtx=0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int amr_wb_encode_close(AVCodecContext * avctx)
|
|
{
|
|
AMRWBContext *s = (AMRWBContext*) avctx->priv_data;
|
|
E_IF_exit(s->state);
|
|
av_freep(&avctx->coded_frame);
|
|
s->frameCount++;
|
|
return 0;
|
|
}
|
|
|
|
static int amr_wb_encode_frame(AVCodecContext *avctx,
|
|
unsigned char *frame/*out*/, int buf_size, void *data/*in*/)
|
|
{
|
|
AMRWBContext *s = (AMRWBContext*) avctx->priv_data;
|
|
int size;
|
|
s->mode=getWBBitrateMode(avctx->bit_rate);
|
|
size = E_IF_encode(s->state, s->mode, data, frame, s->allow_dtx);
|
|
return size;
|
|
}
|
|
|
|
static int amr_wb_decode_init(AVCodecContext * avctx)
|
|
{
|
|
AMRWBContext *s = (AMRWBContext *)avctx->priv_data;
|
|
s->frameCount=0;
|
|
s->state = D_IF_init();
|
|
|
|
amr_decode_fix_avctx(avctx);
|
|
|
|
if(avctx->channels > 1)
|
|
{
|
|
av_log(avctx, AV_LOG_ERROR, "amr_wb: multichannel decoding not supported\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
extern const UWord8 block_size[];
|
|
|
|
static int amr_wb_decode_frame(AVCodecContext * avctx,
|
|
void *data, int *data_size,
|
|
uint8_t * buf, int buf_size)
|
|
{
|
|
AMRWBContext *s = (AMRWBContext*)avctx->priv_data;
|
|
|
|
uint8_t*amrData=buf;
|
|
int mode;
|
|
int packet_size;
|
|
|
|
if(buf_size==0) {
|
|
/* nothing to do */
|
|
return 0;
|
|
}
|
|
|
|
mode = (amrData[0] >> 3) & 0x000F;
|
|
packet_size = block_size[mode];
|
|
|
|
if(packet_size > buf_size) {
|
|
av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n", buf_size, packet_size+1);
|
|
return -1;
|
|
}
|
|
|
|
s->frameCount++;
|
|
D_IF_decode( s->state, amrData, data, _good_frame);
|
|
*data_size=320*2;
|
|
return packet_size;
|
|
}
|
|
|
|
static int amr_wb_decode_close(AVCodecContext * avctx)
|
|
{
|
|
AMRWBContext *s = (AMRWBContext *)avctx->priv_data;
|
|
D_IF_exit(s->state);
|
|
return 0;
|
|
}
|
|
|
|
AVCodec amr_wb_decoder =
|
|
{
|
|
"amr_wb",
|
|
CODEC_TYPE_AUDIO,
|
|
CODEC_ID_AMR_WB,
|
|
sizeof(AMRWBContext),
|
|
amr_wb_decode_init,
|
|
NULL,
|
|
amr_wb_decode_close,
|
|
amr_wb_decode_frame,
|
|
};
|
|
|
|
AVCodec amr_wb_encoder =
|
|
{
|
|
"amr_wb",
|
|
CODEC_TYPE_AUDIO,
|
|
CODEC_ID_AMR_WB,
|
|
sizeof(AMRWBContext),
|
|
amr_wb_encode_init,
|
|
amr_wb_encode_frame,
|
|
amr_wb_encode_close,
|
|
NULL,
|
|
};
|
|
|
|
#endif //CONFIG_AMR_WB
|