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91024272cb
of the reference implementation it is possible to use proper libraries now. patch by Stanislav Brabec, sbrabec suse cz, changes and bug fixes by me Originally committed as revision 8717 to svn://svn.ffmpeg.org/ffmpeg/trunk
717 lines
18 KiB
C
717 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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/** @file
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* Adaptive Multi-Rate (AMR) Audio decoder stub.
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*
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* This code implements both an AMR-NarrowBand (AMR-NB) and an AMR-WideBand
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* (AMR-WB) audio encoder/decoder through external reference code from
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* http://www.3gpp.org/. The license 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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* at least 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 are supported for AMR-NB, but only float for
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* AMR-WB.
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*
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* \section AMR-NB
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*
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* \subsection Float
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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/26.104/26104-610.zip
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* Extract the source into \c "ffmpeg/libavcodec/amr_float".
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* Enable it by passing \c "--enable-amr-nb" to \c "./configure".
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*
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* \subsection Fixed-point
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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/26.073/26073-600.zip
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* Extract the source into \c "ffmpeg/libavcodec/amr".
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* Enable it by passing \c "--enable-amr-nb-fixed" to \c "./configure".
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*
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* \subsection Specification
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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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*
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* \section AMR-WB
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* \subsection Float
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* The reference code can be downloaded from:
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* http://www.3gpp.org/ftp/Specs/archive/26_series/26.204/26204-600.zip
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* It should be extracted to \c "ffmpeg/libavcodec/amrwb_float".
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* Enable it by passing \c "--enable-amr-wb" to \c "./configure".
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*
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* \subsection Fixed-point
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* If someone wants to use the fixed point version it can be downloaded from:
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* http://www.3gpp.org/ftp/Specs/archive/26_series/26.173/26173-571.zip.
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*
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* \subsection Specification
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* The specification for AMR-WB can be found in TS 26.171
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* (http://www.3gpp.org/ftp/Specs/html-info/26171.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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*
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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 <amrnb/interf_dec.h>
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#include <amrnb/interf_enc.h>
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#endif
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static const char *nb_bitrate_unsupported =
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"bitrate not supported: use one of 4.75k, 5.15k, 5.9k, 6.7k, 7.4k, 7.95k, 10.2k or 12.2k\n";
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static const char *wb_bitrate_unsupported =
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"bitrate not supported: use one of 6.6k, 8.85k, 12.65k, 14.25k, 15.85k, 18.25k, 19.85k, 23.05k, or 23.85k\n";
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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 rate;
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enum Mode mode;
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} AMR_bitrates;
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/* Match desired bitrate */
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static int getBitrateMode(int bitrate)
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{
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/* make the correspondance between bitrate and mode */
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AMR_bitrates rates[]={ {4750,MR475},
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{5150,MR515},
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{5900,MR59},
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{6700,MR67},
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{7400,MR74},
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{7950,MR795},
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{10200,MR102},
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{12200,MR122},
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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].rate==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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/* no bitrate matching, return an error */
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return -1;
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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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int 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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av_log(avctx, AV_LOG_ERROR, "Only 8000Hz sample rate supported\n");
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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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av_log(avctx, AV_LOG_ERROR, "Only mono supported\n");
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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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av_log(avctx, AV_LOG_ERROR, "Speech_Encode_Frame_init error\n");
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return -1;
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}
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if((s->enc_bitrate=getBitrateMode(avctx->bit_rate))<0)
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{
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av_log(avctx, AV_LOG_ERROR, nb_bitrate_unsupported);
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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_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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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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/* 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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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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int 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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av_log(avctx, AV_LOG_ERROR, "Only 8000Hz sample rate supported\n");
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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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av_log(avctx, AV_LOG_ERROR, "Only mono supported\n");
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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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av_log(avctx, AV_LOG_ERROR, "Encoder_Interface_init error\n");
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return -1;
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}
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if((s->enc_bitrate=getBitrateMode(avctx->bit_rate))<0)
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{
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av_log(avctx, AV_LOG_ERROR, nb_bitrate_unsupported);
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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_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 = 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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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 = avctx->priv_data;
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int written;
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if((s->enc_bitrate=getBitrateMode(avctx->bit_rate))<0)
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{
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av_log(avctx, AV_LOG_ERROR, nb_bitrate_unsupported);
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return -1;
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}
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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;
|
|
}
|
|
|
|
#endif
|
|
|
|
#if defined(CONFIG_AMR_NB) || defined(CONFIG_AMR_NB_FIXED)
|
|
|
|
AVCodec amr_nb_decoder =
|
|
{
|
|
"amr_nb",
|
|
CODEC_TYPE_AUDIO,
|
|
CODEC_ID_AMR_NB,
|
|
sizeof(AMRContext),
|
|
amr_nb_decode_init,
|
|
NULL,
|
|
amr_nb_decode_close,
|
|
amr_nb_decode_frame,
|
|
};
|
|
|
|
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/enc_if.h>
|
|
#include <amrwb/dec_if.h>
|
|
#include <amrwb/if_rom.h>
|
|
|
|
/* Common code for fixed and float version*/
|
|
typedef struct AMRWB_bitrates
|
|
{
|
|
int rate;
|
|
int mode;
|
|
} AMRWB_bitrates;
|
|
|
|
static int getWBBitrateMode(int bitrate)
|
|
{
|
|
/* make the correspondance between bitrate and mode */
|
|
AMRWB_bitrates rates[]={ {6600,0},
|
|
{8850,1},
|
|
{12650,2},
|
|
{14250,3},
|
|
{15850,4},
|
|
{18250,5},
|
|
{19850,6},
|
|
{23050,7},
|
|
{23850,8},
|
|
};
|
|
int i;
|
|
|
|
for(i=0;i<9;i++)
|
|
{
|
|
if(rates[i].rate==bitrate)
|
|
{
|
|
return(rates[i].mode);
|
|
}
|
|
}
|
|
/* no bitrate matching, return an error */
|
|
return -1;
|
|
}
|
|
|
|
|
|
typedef struct AMRWBContext {
|
|
int frameCount;
|
|
void *state;
|
|
int mode;
|
|
Word16 allow_dtx;
|
|
} AMRWBContext;
|
|
|
|
static int amr_wb_encode_init(AVCodecContext * avctx)
|
|
{
|
|
AMRWBContext *s = avctx->priv_data;
|
|
|
|
s->frameCount=0;
|
|
|
|
if(avctx->sample_rate!=16000)
|
|
{
|
|
av_log(avctx, AV_LOG_ERROR, "Only 16000Hz sample rate supported\n");
|
|
return -1;
|
|
}
|
|
|
|
if(avctx->channels!=1)
|
|
{
|
|
av_log(avctx, AV_LOG_ERROR, "Only mono supported\n");
|
|
return -1;
|
|
}
|
|
|
|
if((s->mode=getWBBitrateMode(avctx->bit_rate))<0)
|
|
{
|
|
av_log(avctx, AV_LOG_ERROR, wb_bitrate_unsupported);
|
|
return -1;
|
|
}
|
|
|
|
avctx->frame_size=320;
|
|
avctx->coded_frame= avcodec_alloc_frame();
|
|
|
|
s->state = E_IF_init();
|
|
s->allow_dtx=0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int amr_wb_encode_close(AVCodecContext * avctx)
|
|
{
|
|
AMRWBContext *s = 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 = avctx->priv_data;
|
|
int size;
|
|
|
|
if((s->mode=getWBBitrateMode(avctx->bit_rate))<0)
|
|
{
|
|
av_log(avctx, AV_LOG_ERROR, wb_bitrate_unsupported);
|
|
return -1;
|
|
}
|
|
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 = 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;
|
|
}
|
|
|
|
static int amr_wb_decode_frame(AVCodecContext * avctx,
|
|
void *data, int *data_size,
|
|
uint8_t * buf, int buf_size)
|
|
{
|
|
AMRWBContext *s = 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 = 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
|