summaryrefslogtreecommitdiff
path: root/src/libffmpeg/libavcodec/truespeech.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/libffmpeg/libavcodec/truespeech.c')
-rw-r--r--src/libffmpeg/libavcodec/truespeech.c381
1 files changed, 0 insertions, 381 deletions
diff --git a/src/libffmpeg/libavcodec/truespeech.c b/src/libffmpeg/libavcodec/truespeech.c
deleted file mode 100644
index d37aa9454..000000000
--- a/src/libffmpeg/libavcodec/truespeech.c
+++ /dev/null
@@ -1,381 +0,0 @@
-/*
- * DSP Group TrueSpeech compatible decoder
- * Copyright (c) 2005 Konstantin Shishkov
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-#include "avcodec.h"
-
-#include "truespeech_data.h"
-/**
- * @file truespeech.c
- * TrueSpeech decoder.
- */
-
-/**
- * TrueSpeech decoder context
- */
-typedef struct {
- /* input data */
- int16_t vector[8]; //< input vector: 5/5/4/4/4/3/3/3
- int offset1[2]; //< 8-bit value, used in one copying offset
- int offset2[4]; //< 7-bit value, encodes offsets for copying and for two-point filter
- int pulseoff[4]; //< 4-bit offset of pulse values block
- int pulsepos[4]; //< 27-bit variable, encodes 7 pulse positions
- int pulseval[4]; //< 7x2-bit pulse values
- int flag; //< 1-bit flag, shows how to choose filters
- /* temporary data */
- int filtbuf[146]; // some big vector used for storing filters
- int prevfilt[8]; // filter from previous frame
- int16_t tmp1[8]; // coefficients for adding to out
- int16_t tmp2[8]; // coefficients for adding to out
- int16_t tmp3[8]; // coefficients for adding to out
- int16_t cvector[8]; // correlated input vector
- int filtval; // gain value for one function
- int16_t newvec[60]; // tmp vector
- int16_t filters[32]; // filters for every subframe
-} TSContext;
-
-static int truespeech_decode_init(AVCodecContext * avctx)
-{
-// TSContext *c = avctx->priv_data;
-
- return 0;
-}
-
-static void truespeech_read_frame(TSContext *dec, uint8_t *input)
-{
- uint32_t t;
-
- /* first dword */
- t = AV_RL32(input);
- input += 4;
-
- dec->flag = t & 1;
-
- dec->vector[0] = ts_codebook[0][(t >> 1) & 0x1F];
- dec->vector[1] = ts_codebook[1][(t >> 6) & 0x1F];
- dec->vector[2] = ts_codebook[2][(t >> 11) & 0xF];
- dec->vector[3] = ts_codebook[3][(t >> 15) & 0xF];
- dec->vector[4] = ts_codebook[4][(t >> 19) & 0xF];
- dec->vector[5] = ts_codebook[5][(t >> 23) & 0x7];
- dec->vector[6] = ts_codebook[6][(t >> 26) & 0x7];
- dec->vector[7] = ts_codebook[7][(t >> 29) & 0x7];
-
- /* second dword */
- t = AV_RL32(input);
- input += 4;
-
- dec->offset2[0] = (t >> 0) & 0x7F;
- dec->offset2[1] = (t >> 7) & 0x7F;
- dec->offset2[2] = (t >> 14) & 0x7F;
- dec->offset2[3] = (t >> 21) & 0x7F;
-
- dec->offset1[0] = ((t >> 28) & 0xF) << 4;
-
- /* third dword */
- t = AV_RL32(input);
- input += 4;
-
- dec->pulseval[0] = (t >> 0) & 0x3FFF;
- dec->pulseval[1] = (t >> 14) & 0x3FFF;
-
- dec->offset1[1] = (t >> 28) & 0x0F;
-
- /* fourth dword */
- t = AV_RL32(input);
- input += 4;
-
- dec->pulseval[2] = (t >> 0) & 0x3FFF;
- dec->pulseval[3] = (t >> 14) & 0x3FFF;
-
- dec->offset1[1] |= ((t >> 28) & 0x0F) << 4;
-
- /* fifth dword */
- t = AV_RL32(input);
- input += 4;
-
- dec->pulsepos[0] = (t >> 4) & 0x7FFFFFF;
-
- dec->pulseoff[0] = (t >> 0) & 0xF;
-
- dec->offset1[0] |= (t >> 31) & 1;
-
- /* sixth dword */
- t = AV_RL32(input);
- input += 4;
-
- dec->pulsepos[1] = (t >> 4) & 0x7FFFFFF;
-
- dec->pulseoff[1] = (t >> 0) & 0xF;
-
- dec->offset1[0] |= ((t >> 31) & 1) << 1;
-
- /* seventh dword */
- t = AV_RL32(input);
- input += 4;
-
- dec->pulsepos[2] = (t >> 4) & 0x7FFFFFF;
-
- dec->pulseoff[2] = (t >> 0) & 0xF;
-
- dec->offset1[0] |= ((t >> 31) & 1) << 2;
-
- /* eighth dword */
- t = AV_RL32(input);
- input += 4;
-
- dec->pulsepos[3] = (t >> 4) & 0x7FFFFFF;
-
- dec->pulseoff[3] = (t >> 0) & 0xF;
-
- dec->offset1[0] |= ((t >> 31) & 1) << 3;
-
-}
-
-static void truespeech_correlate_filter(TSContext *dec)
-{
- int16_t tmp[8];
- int i, j;
-
- for(i = 0; i < 8; i++){
- if(i > 0){
- memcpy(tmp, dec->cvector, i * 2);
- for(j = 0; j < i; j++)
- dec->cvector[j] = ((tmp[i - j - 1] * dec->vector[i]) +
- (dec->cvector[j] << 15) + 0x4000) >> 15;
- }
- dec->cvector[i] = (8 - dec->vector[i]) >> 3;
- }
- for(i = 0; i < 8; i++)
- dec->cvector[i] = (dec->cvector[i] * ts_230[i]) >> 15;
-
- dec->filtval = dec->vector[0];
-}
-
-static void truespeech_filters_merge(TSContext *dec)
-{
- int i;
-
- if(!dec->flag){
- for(i = 0; i < 8; i++){
- dec->filters[i + 0] = dec->prevfilt[i];
- dec->filters[i + 8] = dec->prevfilt[i];
- }
- }else{
- for(i = 0; i < 8; i++){
- dec->filters[i + 0]=(dec->cvector[i] * 21846 + dec->prevfilt[i] * 10923 + 16384) >> 15;
- dec->filters[i + 8]=(dec->cvector[i] * 10923 + dec->prevfilt[i] * 21846 + 16384) >> 15;
- }
- }
- for(i = 0; i < 8; i++){
- dec->filters[i + 16] = dec->cvector[i];
- dec->filters[i + 24] = dec->cvector[i];
- }
-}
-
-static void truespeech_apply_twopoint_filter(TSContext *dec, int quart)
-{
- int16_t tmp[146 + 60], *ptr0, *ptr1;
- const int16_t *filter;
- int i, t, off;
-
- t = dec->offset2[quart];
- if(t == 127){
- memset(dec->newvec, 0, 60 * 2);
- return;
- }
- for(i = 0; i < 146; i++)
- tmp[i] = dec->filtbuf[i];
- off = (t / 25) + dec->offset1[quart >> 1] + 18;
- ptr0 = tmp + 145 - off;
- ptr1 = tmp + 146;
- filter = (const int16_t*)ts_240 + (t % 25) * 2;
- for(i = 0; i < 60; i++){
- t = (ptr0[0] * filter[0] + ptr0[1] * filter[1] + 0x2000) >> 14;
- ptr0++;
- dec->newvec[i] = t;
- ptr1[i] = t;
- }
-}
-
-static void truespeech_place_pulses(TSContext *dec, int16_t *out, int quart)
-{
- int16_t tmp[7];
- int i, j, t;
- const int16_t *ptr1;
- int16_t *ptr2;
- int coef;
-
- memset(out, 0, 60 * 2);
- for(i = 0; i < 7; i++) {
- t = dec->pulseval[quart] & 3;
- dec->pulseval[quart] >>= 2;
- tmp[6 - i] = ts_562[dec->pulseoff[quart] * 4 + t];
- }
-
- coef = dec->pulsepos[quart] >> 15;
- ptr1 = (const int16_t*)ts_140 + 30;
- ptr2 = tmp;
- for(i = 0, j = 3; (i < 30) && (j > 0); i++){
- t = *ptr1++;
- if(coef >= t)
- coef -= t;
- else{
- out[i] = *ptr2++;
- ptr1 += 30;
- j--;
- }
- }
- coef = dec->pulsepos[quart] & 0x7FFF;
- ptr1 = (const int16_t*)ts_140;
- for(i = 30, j = 4; (i < 60) && (j > 0); i++){
- t = *ptr1++;
- if(coef >= t)
- coef -= t;
- else{
- out[i] = *ptr2++;
- ptr1 += 30;
- j--;
- }
- }
-
-}
-
-static void truespeech_update_filters(TSContext *dec, int16_t *out, int quart)
-{
- int i;
-
- for(i = 0; i < 86; i++)
- dec->filtbuf[i] = dec->filtbuf[i + 60];
- for(i = 0; i < 60; i++){
- dec->filtbuf[i + 86] = out[i] + dec->newvec[i] - (dec->newvec[i] >> 3);
- out[i] += dec->newvec[i];
- }
-}
-
-static void truespeech_synth(TSContext *dec, int16_t *out, int quart)
-{
- int i,k;
- int t[8];
- int16_t *ptr0, *ptr1;
-
- ptr0 = dec->tmp1;
- ptr1 = dec->filters + quart * 8;
- for(i = 0; i < 60; i++){
- int sum = 0;
- for(k = 0; k < 8; k++)
- sum += ptr0[k] * ptr1[k];
- sum = (sum + (out[i] << 12) + 0x800) >> 12;
- out[i] = clip(sum, -0x7FFE, 0x7FFE);
- for(k = 7; k > 0; k--)
- ptr0[k] = ptr0[k - 1];
- ptr0[0] = out[i];
- }
-
- for(i = 0; i < 8; i++)
- t[i] = (ts_5E2[i] * ptr1[i]) >> 15;
-
- ptr0 = dec->tmp2;
- for(i = 0; i < 60; i++){
- int sum = 0;
- for(k = 0; k < 8; k++)
- sum += ptr0[k] * t[k];
- for(k = 7; k > 0; k--)
- ptr0[k] = ptr0[k - 1];
- ptr0[0] = out[i];
- out[i] = ((out[i] << 12) - sum) >> 12;
- }
-
- for(i = 0; i < 8; i++)
- t[i] = (ts_5F2[i] * ptr1[i]) >> 15;
-
- ptr0 = dec->tmp3;
- for(i = 0; i < 60; i++){
- int sum = out[i] << 12;
- for(k = 0; k < 8; k++)
- sum += ptr0[k] * t[k];
- for(k = 7; k > 0; k--)
- ptr0[k] = ptr0[k - 1];
- ptr0[0] = clip((sum + 0x800) >> 12, -0x7FFE, 0x7FFE);
-
- sum = ((ptr0[1] * (dec->filtval - (dec->filtval >> 2))) >> 4) + sum;
- sum = sum - (sum >> 3);
- out[i] = clip((sum + 0x800) >> 12, -0x7FFE, 0x7FFE);
- }
-}
-
-static void truespeech_save_prevvec(TSContext *c)
-{
- int i;
-
- for(i = 0; i < 8; i++)
- c->prevfilt[i] = c->cvector[i];
-}
-
-static int truespeech_decode_frame(AVCodecContext *avctx,
- void *data, int *data_size,
- uint8_t *buf, int buf_size)
-{
- TSContext *c = avctx->priv_data;
-
- int i;
- short *samples = data;
- int consumed = 0;
- int16_t out_buf[240];
-
- if (!buf_size)
- return 0;
-
- while (consumed < buf_size) {
- truespeech_read_frame(c, buf + consumed);
- consumed += 32;
-
- truespeech_correlate_filter(c);
- truespeech_filters_merge(c);
-
- memset(out_buf, 0, 240 * 2);
- for(i = 0; i < 4; i++) {
- truespeech_apply_twopoint_filter(c, i);
- truespeech_place_pulses(c, out_buf + i * 60, i);
- truespeech_update_filters(c, out_buf + i * 60, i);
- truespeech_synth(c, out_buf + i * 60, i);
- }
-
- truespeech_save_prevvec(c);
-
- /* finally output decoded frame */
- for(i = 0; i < 240; i++)
- *samples++ = out_buf[i];
-
- }
-
- *data_size = consumed * 15;
-
- return buf_size;
-}
-
-AVCodec truespeech_decoder = {
- "truespeech",
- CODEC_TYPE_AUDIO,
- CODEC_ID_TRUESPEECH,
- sizeof(TSContext),
- truespeech_decode_init,
- NULL,
- NULL,
- truespeech_decode_frame,
-};
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-25 14:07:10 +0000