mirror of
https://github.com/FFmpeg/FFmpeg.git
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TrueSpeech compatible audio decoder by Konstantin Shishkov
Originally committed as revision 4803 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Diego Biurrun
parent
27c748b576
commit
bf3027c87b
@ -26,6 +26,7 @@ version <next>
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- ffserver fixed, it should now be usable again
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- QDM2 audio decoder
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- cook audio decoder
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- TrueSpeech audio decoder
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- wma2 audio decoder fixed, now all files should play correctly
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- JPEG-LS decoder (unfinished)
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- build system improvements
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@ -161,6 +161,9 @@ endif
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ifeq ($(CONFIG_TRUEMOTION2_DECODER),yes)
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OBJS+= truemotion2.o
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endif
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ifeq ($(CONFIG_TRUESPEECH_DECODER),yes)
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OBJS+= truespeech.o
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endif
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ifeq ($(CONFIG_TSCC_DECODER),yes)
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OBJS+= tscc.o
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endif
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@ -497,6 +497,9 @@ void avcodec_register_all(void)
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#ifdef CONFIG_COOK_DECODER
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register_avcodec(&cook_decoder);
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#endif //CONFIG_COOK_DECODER
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#ifdef CONFIG_TRUESPEECH_DECODER
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register_avcodec(&truespeech_decoder);
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#endif //CONFIG_TRUESPEECH_DECODER
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#ifdef CONFIG_RAWVIDEO_DECODER
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register_avcodec(&rawvideo_decoder);
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#endif //CONFIG_RAWVIDEO_DECODER
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@ -189,6 +189,7 @@ enum CodecID {
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CODEC_ID_GSM,
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CODEC_ID_QDM2,
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CODEC_ID_COOK,
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CODEC_ID_TRUESPEECH,
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CODEC_ID_OGGTHEORA= 0x16000,
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@ -2134,6 +2135,7 @@ extern AVCodec mp3adu_decoder;
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extern AVCodec mp3on4_decoder;
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extern AVCodec qdm2_decoder;
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extern AVCodec cook_decoder;
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extern AVCodec truespeech_decoder;
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extern AVCodec mace3_decoder;
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extern AVCodec mace6_decoder;
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extern AVCodec huffyuv_decoder;
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377
libavcodec/truespeech.c
Normal file
377
libavcodec/truespeech.c
Normal file
@ -0,0 +1,377 @@
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/*
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* DSP Group TrueSpeech compatible decoder
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* Copyright (c) 2005 Konstantin Shishkov
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*
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* This library 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 of the License, or (at your option) any later version.
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*
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* This library 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 this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "avcodec.h"
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#include "truespeech_data.h"
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/**
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* @file truespeech.c
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* TrueSpeech decoder.
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*/
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/**
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* TrueSpeech decoder context
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*/
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typedef struct {
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/* input data */
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int16_t vector[8]; //< input vector: 5/5/4/4/4/3/3/3
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int offset1[2]; //< 8-bit value, used in one copying offset
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int offset2[4]; //< 7-bit value, encodes offsets for copying and for two-point filter
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int pulseoff[4]; //< 4-bit offset of pulse values block
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int pulsepos[4]; //< 27-bit variable, encodes 7 pulse positions
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int pulseval[4]; //< 7x2-bit pulse values
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int flag; //< 1-bit flag, shows how to choose filters
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/* temporary data */
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int filtbuf[146]; // some big vector used for storing filters
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int prevfilt[8]; // filter from previous frame
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int16_t tmp1[8]; // coefficients for adding to out
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int16_t tmp2[8]; // coefficients for adding to out
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int16_t tmp3[8]; // coefficients for adding to out
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int16_t cvector[8]; // correlated input vector
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int filtval; // gain value for one function
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int16_t newvec[60]; // tmp vector
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int16_t filters[32]; // filters for every subframe
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} TSContext;
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static int truespeech_decode_init(AVCodecContext * avctx)
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{
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// TSContext *c = avctx->priv_data;
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return 0;
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}
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static void truespeech_read_frame(TSContext *dec, uint8_t *input)
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{
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uint32_t t;
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/* first dword */
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t = LE_32(input);
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input += 4;
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dec->flag = t & 1;
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dec->vector[0] = ts_codebook[0][(t >> 1) & 0x1F];
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dec->vector[1] = ts_codebook[1][(t >> 6) & 0x1F];
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dec->vector[2] = ts_codebook[2][(t >> 11) & 0xF];
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dec->vector[3] = ts_codebook[3][(t >> 15) & 0xF];
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dec->vector[4] = ts_codebook[4][(t >> 19) & 0xF];
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dec->vector[5] = ts_codebook[5][(t >> 23) & 0x7];
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dec->vector[6] = ts_codebook[6][(t >> 26) & 0x7];
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dec->vector[7] = ts_codebook[7][(t >> 29) & 0x7];
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/* second dword */
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t = LE_32(input);
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input += 4;
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dec->offset2[0] = (t >> 0) & 0x7F;
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dec->offset2[1] = (t >> 7) & 0x7F;
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dec->offset2[2] = (t >> 14) & 0x7F;
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dec->offset2[3] = (t >> 21) & 0x7F;
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dec->offset1[0] = ((t >> 28) & 0xF) << 4;
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/* third dword */
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t = LE_32(input);
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input += 4;
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dec->pulseval[0] = (t >> 0) & 0x3FFF;
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dec->pulseval[1] = (t >> 14) & 0x3FFF;
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dec->offset1[1] = (t >> 28) & 0x0F;
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/* fourth dword */
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t = LE_32(input);
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input += 4;
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dec->pulseval[2] = (t >> 0) & 0x3FFF;
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dec->pulseval[3] = (t >> 14) & 0x3FFF;
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dec->offset1[1] |= ((t >> 28) & 0x0F) << 4;
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/* fifth dword */
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t = LE_32(input);
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input += 4;
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dec->pulsepos[0] = (t >> 4) & 0x7FFFFFF;
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dec->pulseoff[0] = (t >> 0) & 0xF;
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dec->offset1[0] |= (t >> 31) & 1;
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/* sixth dword */
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t = LE_32(input);
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input += 4;
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dec->pulsepos[1] = (t >> 4) & 0x7FFFFFF;
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dec->pulseoff[1] = (t >> 0) & 0xF;
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dec->offset1[0] |= ((t >> 31) & 1) << 1;
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/* seventh dword */
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t = LE_32(input);
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input += 4;
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dec->pulsepos[2] = (t >> 4) & 0x7FFFFFF;
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dec->pulseoff[2] = (t >> 0) & 0xF;
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dec->offset1[0] |= ((t >> 31) & 1) << 2;
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/* eighth dword */
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t = LE_32(input);
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input += 4;
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dec->pulsepos[3] = (t >> 4) & 0x7FFFFFF;
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dec->pulseoff[3] = (t >> 0) & 0xF;
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dec->offset1[0] |= ((t >> 31) & 1) << 3;
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}
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static void truespeech_correlate_filter(TSContext *dec)
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{
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int16_t tmp[8];
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int i, j;
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for(i = 0; i < 8; i++){
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if(i > 0){
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memcpy(tmp, dec->cvector, i * 2);
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for(j = 0; j < i; j++)
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dec->cvector[j] = ((tmp[i - j - 1] * dec->vector[i]) +
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(dec->cvector[j] << 15) + 0x4000) >> 15;
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}
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dec->cvector[i] = (8 - dec->vector[i]) >> 3;
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}
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for(i = 0; i < 8; i++)
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dec->cvector[i] = (dec->cvector[i] * ts_230[i]) >> 15;
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dec->filtval = dec->vector[0];
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}
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static void truespeech_filters_merge(TSContext *dec)
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{
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int i;
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if(!dec->flag){
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for(i = 0; i < 8; i++){
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dec->filters[i + 0] = dec->prevfilt[i];
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dec->filters[i + 8] = dec->prevfilt[i];
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}
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}else{
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for(i = 0; i < 8; i++){
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dec->filters[i + 0]=(dec->cvector[i] * 21846 + dec->prevfilt[i] * 10923 + 16384) >> 15;
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dec->filters[i + 8]=(dec->cvector[i] * 10923 + dec->prevfilt[i] * 21846 + 16384) >> 15;
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}
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}
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for(i = 0; i < 8; i++){
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dec->filters[i + 16] = dec->cvector[i];
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dec->filters[i + 24] = dec->cvector[i];
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}
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}
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static void truespeech_apply_twopoint_filter(TSContext *dec, int quart)
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{
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int16_t tmp[146 + 60], *ptr0, *ptr1, *filter;
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int i, t, off;
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t = dec->offset2[quart];
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if(t == 127){
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memset(dec->newvec, 0, 60 * 2);
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return;
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}
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for(i = 0; i < 146; i++)
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tmp[i] = dec->filtbuf[i];
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off = (t / 25) + dec->offset1[quart >> 1] + 18;
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ptr0 = tmp + 145 - off;
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ptr1 = tmp + 146;
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filter = ts_240 + (t % 25) * 2;
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for(i = 0; i < 60; i++){
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t = (ptr0[0] * filter[0] + ptr0[1] * filter[1] + 0x2000) >> 14;
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ptr0++;
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dec->newvec[i] = t;
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ptr1[i] = t;
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}
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}
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static void truespeech_place_pulses(TSContext *dec, int16_t *out, int quart)
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{
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int16_t tmp[7];
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int i, j, t;
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int16_t *ptr1, *ptr2;
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int coef;
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memset(out, 0, 60 * 2);
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for(i = 0; i < 7; i++) {
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t = dec->pulseval[quart] & 3;
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dec->pulseval[quart] >>= 2;
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tmp[6 - i] = ts_562[dec->pulseoff[quart] * 4 + t];
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}
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coef = dec->pulsepos[quart] >> 15;
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ptr1 = ts_140 + 30;
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ptr2 = tmp;
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for(i = 0, j = 3; (i < 30) && (j > 0); i++){
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t = *ptr1++;
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if(coef >= t)
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coef -= t;
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else{
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out[i] = *ptr2++;
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ptr1 += 30;
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j--;
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}
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}
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coef = dec->pulsepos[quart] & 0x7FFF;
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ptr1 = ts_140;
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for(i = 30, j = 4; (i < 60) && (j > 0); i++){
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t = *ptr1++;
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if(coef >= t)
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coef -= t;
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else{
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out[i] = *ptr2++;
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ptr1 += 30;
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j--;
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}
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}
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}
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static void truespeech_update_filters(TSContext *dec, int16_t *out, int quart)
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{
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int i;
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for(i = 0; i < 86; i++)
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dec->filtbuf[i] = dec->filtbuf[i + 60];
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for(i = 0; i < 60; i++){
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dec->filtbuf[i + 86] = out[i] + dec->newvec[i] - (dec->newvec[i] >> 3);
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out[i] += dec->newvec[i];
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}
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}
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static void truespeech_synth(TSContext *dec, int16_t *out, int quart)
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{
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int i,k;
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int t[8];
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int16_t *ptr0, *ptr1;
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ptr0 = dec->tmp1;
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ptr1 = dec->filters + quart * 8;
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for(i = 0; i < 60; i++){
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int sum = 0;
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for(k = 0; k < 8; k++)
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sum += ptr0[k] * ptr1[k];
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sum = (sum + (out[i] << 12) + 0x800) >> 12;
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out[i] = clip(sum, -0x7FFE, 0x7FFE);
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for(k = 7; k > 0; k--)
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ptr0[k] = ptr0[k - 1];
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ptr0[0] = out[i];
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}
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for(i = 0; i < 8; i++)
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t[i] = (ts_5E2[i] * ptr1[i]) >> 15;
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ptr0 = dec->tmp2;
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for(i = 0; i < 60; i++){
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int sum = 0;
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for(k = 0; k < 8; k++)
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sum += ptr0[k] * t[k];
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for(k = 7; k > 0; k--)
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ptr0[k] = ptr0[k - 1];
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ptr0[0] = out[i];
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out[i] = ((out[i] << 12) - sum) >> 12;
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}
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for(i = 0; i < 8; i++)
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t[i] = (ts_5F2[i] * ptr1[i]) >> 15;
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ptr0 = dec->tmp3;
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for(i = 0; i < 60; i++){
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int sum = out[i] << 12;
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for(k = 0; k < 8; k++)
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sum += ptr0[k] * t[k];
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for(k = 7; k > 0; k--)
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ptr0[k] = ptr0[k - 1];
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ptr0[0] = clip((sum + 0x800) >> 12, -0x7FFE, 0x7FFE);
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sum = ((ptr0[1] * (dec->filtval - (dec->filtval >> 2))) >> 4) + sum;
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sum = sum - (sum >> 3);
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out[i] = clip((sum + 0x800) >> 12, -0x7FFE, 0x7FFE);
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}
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}
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static void truespeech_save_prevvec(TSContext *c)
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{
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int i;
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for(i = 0; i < 8; i++)
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c->prevfilt[i] = c->cvector[i];
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}
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static int truespeech_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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TSContext *c = avctx->priv_data;
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int i;
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short *samples = data;
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int consumed = 0;
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int16_t out_buf[240];
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if (!buf_size)
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return 0;
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while (consumed < buf_size) {
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truespeech_read_frame(c, buf + consumed);
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consumed += 32;
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truespeech_correlate_filter(c);
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truespeech_filters_merge(c);
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memset(out_buf, 0, 240 * 2);
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for(i = 0; i < 4; i++) {
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truespeech_apply_twopoint_filter(c, i);
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truespeech_place_pulses(c, out_buf + i * 60, i);
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truespeech_update_filters(c, out_buf + i * 60, i);
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truespeech_synth(c, out_buf + i * 60, i);
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}
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truespeech_save_prevvec(c);
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/* finally output decoded frame */
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for(i = 0; i < 240; i++)
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*samples++ = out_buf[i];
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}
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*data_size = consumed * 15;
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return buf_size;
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}
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AVCodec truespeech_decoder = {
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"truespeech",
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CODEC_TYPE_AUDIO,
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CODEC_ID_TRUESPEECH,
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sizeof(TSContext),
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truespeech_decode_init,
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NULL,
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NULL,
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truespeech_decode_frame,
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};
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136
libavcodec/truespeech_data.h
Normal file
136
libavcodec/truespeech_data.h
Normal file
@ -0,0 +1,136 @@
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#ifndef __TRUESPEECH_DATA__
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#define __TRUESPEECH_DATA__
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/* codebooks fo expanding input filter */
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const int16_t ts_cb_0[32] = {
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0x8240, 0x8364, 0x84CE, 0x865D, 0x8805, 0x89DE, 0x8BD7, 0x8DF4,
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0x9051, 0x92E2, 0x95DE, 0x990F, 0x9C81, 0xA079, 0xA54C, 0xAAD2,
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0xB18A, 0xB90A, 0xC124, 0xC9CC, 0xD339, 0xDDD3, 0xE9D6, 0xF893,
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0x096F, 0x1ACA, 0x29EC, 0x381F, 0x45F9, 0x546A, 0x63C3, 0x73B5,
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};
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const int16_t ts_cb_1[32] = {
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0x9F65, 0xB56B, 0xC583, 0xD371, 0xE018, 0xEBB4, 0xF61C, 0xFF59,
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0x085B, 0x1106, 0x1952, 0x214A, 0x28C9, 0x2FF8, 0x36E6, 0x3D92,
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||||
0x43DF, 0x49BB, 0x4F46, 0x5467, 0x5930, 0x5DA3, 0x61EC, 0x65F9,
|
||||
0x69D4, 0x6D5A, 0x709E, 0x73AD, 0x766B, 0x78F0, 0x7B5A, 0x7DA5,
|
||||
};
|
||||
|
||||
const int16_t ts_cb_2[16] = {
|
||||
0x96F8, 0xA3B4, 0xAF45, 0xBA53, 0xC4B1, 0xCECC, 0xD86F, 0xE21E,
|
||||
0xEBF3, 0xF640, 0x00F7, 0x0C20, 0x1881, 0x269A, 0x376B, 0x4D60,
|
||||
};
|
||||
|
||||
const int16_t ts_cb_3[16] = {
|
||||
0xC654, 0xDEF2, 0xEFAA, 0xFD94, 0x096A, 0x143F, 0x1E7B, 0x282C,
|
||||
0x3176, 0x3A89, 0x439F, 0x4CA2, 0x557F, 0x5E50, 0x6718, 0x6F8D,
|
||||
};
|
||||
|
||||
const int16_t ts_cb_4[16] = {
|
||||
0xABE7, 0xBBA8, 0xC81C, 0xD326, 0xDD0E, 0xE5D4, 0xEE22, 0xF618,
|
||||
0xFE28, 0x064F, 0x0EB7, 0x17B8, 0x21AA, 0x2D8B, 0x3BA2, 0x4DF9,
|
||||
};
|
||||
|
||||
const int16_t ts_cb_5[8] = {
|
||||
0xD51B, 0xF12E, 0x042E, 0x13C7, 0x2260, 0x311B, 0x40DE, 0x5385,
|
||||
};
|
||||
|
||||
const int16_t ts_cb_6[8] = {
|
||||
0xB550, 0xC825, 0xD980, 0xE997, 0xF883, 0x0752, 0x1811, 0x2E18,
|
||||
};
|
||||
|
||||
const int16_t ts_cb_7[8] = {
|
||||
0xCEF0, 0xE4F9, 0xF6BB, 0x0646, 0x14F5, 0x23FF, 0x356F, 0x4A8D,
|
||||
};
|
||||
|
||||
const int16_t *ts_codebook[8] = {
|
||||
ts_cb_0, ts_cb_1, ts_cb_2, ts_cb_3, ts_cb_4, ts_cb_5, ts_cb_6, ts_cb_7
|
||||
};
|
||||
|
||||
/* table used for decoding pulse positions */
|
||||
const int16_t ts_140[120] = {
|
||||
0x0E46, 0x0CCC, 0x0B6D, 0x0A28, 0x08FC, 0x07E8, 0x06EB, 0x0604,
|
||||
0x0532, 0x0474, 0x03C9, 0x0330, 0x02A8, 0x0230, 0x01C7, 0x016C,
|
||||
0x011E, 0x00DC, 0x00A5, 0x0078, 0x0054, 0x0038, 0x0023, 0x0014,
|
||||
0x000A, 0x0004, 0x0001, 0x0000, 0x0000, 0x0000,
|
||||
|
||||
0x0196, 0x017A, 0x015F, 0x0145, 0x012C, 0x0114, 0x00FD, 0x00E7,
|
||||
0x00D2, 0x00BE, 0x00AB, 0x0099, 0x0088, 0x0078, 0x0069, 0x005B,
|
||||
0x004E, 0x0042, 0x0037, 0x002D, 0x0024, 0x001C, 0x0015, 0x000F,
|
||||
0x000A, 0x0006, 0x0003, 0x0001, 0x0000, 0x0000,
|
||||
|
||||
0x001D, 0x001C, 0x001B, 0x001A, 0x0019, 0x0018, 0x0017, 0x0016,
|
||||
0x0015, 0x0014, 0x0013, 0x0012, 0x0011, 0x0010, 0x000F, 0x000E,
|
||||
0x000D, 0x000C, 0x000B, 0x000A, 0x0009, 0x0008, 0x0007, 0x0006,
|
||||
0x0005, 0x0004, 0x0003, 0x0002, 0x0001, 0x0000,
|
||||
|
||||
0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001,
|
||||
0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001,
|
||||
0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001,
|
||||
0x0001, 0x0001, 0x0001, 0x0001, 0x0001, 0x0001
|
||||
};
|
||||
|
||||
/* filter for correlated input filter */
|
||||
const int16_t ts_230[8] =
|
||||
{ 0x7F3B, 0x7E78, 0x7DB6, 0x7CF5, 0x7C35, 0x7B76, 0x7AB8, 0x79FC };
|
||||
|
||||
/* two-point filters table */
|
||||
const int16_t ts_240[25 * 2] = {
|
||||
0xED2F, 0x5239,
|
||||
0x54F1, 0xE4A9,
|
||||
0x2620, 0xEE3E,
|
||||
0x09D6, 0x2C40,
|
||||
0xEFB5, 0x2BE0,
|
||||
|
||||
0x3FE1, 0x3339,
|
||||
0x442F, 0xE6FE,
|
||||
0x4458, 0xF9DF,
|
||||
0xF231, 0x43DB,
|
||||
0x3DB0, 0xF705,
|
||||
|
||||
0x4F7B, 0xFEFB,
|
||||
0x26AD, 0x0CDC,
|
||||
0x33C2, 0x0739,
|
||||
0x12BE, 0x43A2,
|
||||
0x1BDF, 0x1F3E,
|
||||
|
||||
0x0211, 0x0796,
|
||||
0x2AEB, 0x163F,
|
||||
0x050D, 0x3A38,
|
||||
0x0D1E, 0x0D78,
|
||||
0x150F, 0x3346,
|
||||
|
||||
0x38A4, 0x0B7D,
|
||||
0x2D5D, 0x1FDF,
|
||||
0x19B7, 0x2822,
|
||||
0x0D99, 0x1F12,
|
||||
0x194C, 0x0CE6
|
||||
};
|
||||
|
||||
/* possible pulse values */
|
||||
const int16_t ts_562[64] = {
|
||||
0x0002, 0x0006, 0xFFFE, 0xFFFA,
|
||||
0x0004, 0x000C, 0xFFFC, 0xFFF4,
|
||||
0x0006, 0x0012, 0xFFFA, 0xFFEE,
|
||||
0x000A, 0x001E, 0xFFF6, 0xFFE2,
|
||||
0x0010, 0x0030, 0xFFF0, 0xFFD0,
|
||||
0x0019, 0x004B, 0xFFE7, 0xFFB5,
|
||||
0x0028, 0x0078, 0xFFD8, 0xFF88,
|
||||
0x0040, 0x00C0, 0xFFC0, 0xFF40,
|
||||
0x0065, 0x012F, 0xFF9B, 0xFED1,
|
||||
0x00A1, 0x01E3, 0xFF5F, 0xFE1D,
|
||||
0x0100, 0x0300, 0xFF00, 0xFD00,
|
||||
0x0196, 0x04C2, 0xFE6A, 0xFB3E,
|
||||
0x0285, 0x078F, 0xFD7B, 0xF871,
|
||||
0x0400, 0x0C00, 0xFC00, 0xF400,
|
||||
0x0659, 0x130B, 0xF9A7, 0xECF5,
|
||||
0x0A14, 0x1E3C, 0xF5EC, 0xE1C4
|
||||
};
|
||||
|
||||
/* filters used in final output calculations */
|
||||
const int16_t ts_5E2[8] =
|
||||
{ 0x4666, 0x26B8, 0x154C, 0x0BB6, 0x0671, 0x038B, 0x01F3, 0x0112 };
|
||||
const int16_t ts_5F2[8] =
|
||||
{ 0x6000, 0x4800, 0x3600, 0x2880, 0x1E60, 0x16C8, 0x1116, 0x0CD1 };
|
||||
|
||||
#endif
|
||||
@ -44,6 +44,7 @@ const CodecTag codec_wav_tags[] = {
|
||||
{ CODEC_ID_SONIC_LS, 0x2048 },
|
||||
{ CODEC_ID_ADPCM_CT, 0x200 },
|
||||
{ CODEC_ID_ADPCM_SWF, ('S'<<8)+'F' },
|
||||
{ CODEC_ID_TRUESPEECH, 0x22 },
|
||||
{ 0, 0 },
|
||||
};
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user