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00030 #include <stddef.h>
00031
00032 #include "avcodec.h"
00033 #include "internal.h"
00034 #include "get_bits.h"
00035
00036 #include "qcelpdata.h"
00037
00038 #include "celp_math.h"
00039 #include "celp_filters.h"
00040 #include "acelp_vectors.h"
00041 #include "lsp.h"
00042
00043 #undef NDEBUG
00044 #include <assert.h>
00045
00046 typedef enum
00047 {
00048 I_F_Q = -1,
00049 SILENCE,
00050 RATE_OCTAVE,
00051 RATE_QUARTER,
00052 RATE_HALF,
00053 RATE_FULL
00054 } qcelp_packet_rate;
00055
00056 typedef struct
00057 {
00058 GetBitContext gb;
00059 qcelp_packet_rate bitrate;
00060 QCELPFrame frame;
00062 uint8_t erasure_count;
00063 uint8_t octave_count;
00064 float prev_lspf[10];
00065 float predictor_lspf[10];
00066 float pitch_synthesis_filter_mem[303];
00067 float pitch_pre_filter_mem[303];
00068 float rnd_fir_filter_mem[180];
00069 float formant_mem[170];
00070 float last_codebook_gain;
00071 int prev_g1[2];
00072 int prev_bitrate;
00073 float pitch_gain[4];
00074 uint8_t pitch_lag[4];
00075 uint16_t first16bits;
00076 uint8_t warned_buf_mismatch_bitrate;
00077 } QCELPContext;
00078
00084 static av_cold int qcelp_decode_init(AVCodecContext *avctx)
00085 {
00086 QCELPContext *q = avctx->priv_data;
00087 int i;
00088
00089 avctx->sample_fmt = SAMPLE_FMT_FLT;
00090
00091 for(i=0; i<10; i++)
00092 q->prev_lspf[i] = (i+1)/11.;
00093
00094 return 0;
00095 }
00096
00108 static int decode_lspf(QCELPContext *q, float *lspf)
00109 {
00110 int i;
00111 float tmp_lspf, smooth, erasure_coeff;
00112 const float *predictors;
00113
00114 if(q->bitrate == RATE_OCTAVE || q->bitrate == I_F_Q)
00115 {
00116 predictors = (q->prev_bitrate != RATE_OCTAVE &&
00117 q->prev_bitrate != I_F_Q ?
00118 q->prev_lspf : q->predictor_lspf);
00119
00120 if(q->bitrate == RATE_OCTAVE)
00121 {
00122 q->octave_count++;
00123
00124 for(i=0; i<10; i++)
00125 {
00126 q->predictor_lspf[i] =
00127 lspf[i] = (q->frame.lspv[i] ? QCELP_LSP_SPREAD_FACTOR
00128 : -QCELP_LSP_SPREAD_FACTOR)
00129 + predictors[i] * QCELP_LSP_OCTAVE_PREDICTOR
00130 + (i + 1) * ((1 - QCELP_LSP_OCTAVE_PREDICTOR)/11);
00131 }
00132 smooth = (q->octave_count < 10 ? .875 : 0.1);
00133 }else
00134 {
00135 erasure_coeff = QCELP_LSP_OCTAVE_PREDICTOR;
00136
00137 assert(q->bitrate == I_F_Q);
00138
00139 if(q->erasure_count > 1)
00140 erasure_coeff *= (q->erasure_count < 4 ? 0.9 : 0.7);
00141
00142 for(i=0; i<10; i++)
00143 {
00144 q->predictor_lspf[i] =
00145 lspf[i] = (i + 1) * ( 1 - erasure_coeff)/11
00146 + erasure_coeff * predictors[i];
00147 }
00148 smooth = 0.125;
00149 }
00150
00151
00152 lspf[0] = FFMAX(lspf[0], QCELP_LSP_SPREAD_FACTOR);
00153 for(i=1; i<10; i++)
00154 lspf[i] = FFMAX(lspf[i], (lspf[i-1] + QCELP_LSP_SPREAD_FACTOR));
00155
00156 lspf[9] = FFMIN(lspf[9], (1.0 - QCELP_LSP_SPREAD_FACTOR));
00157 for(i=9; i>0; i--)
00158 lspf[i-1] = FFMIN(lspf[i-1], (lspf[i] - QCELP_LSP_SPREAD_FACTOR));
00159
00160
00161 ff_weighted_vector_sumf(lspf, lspf, q->prev_lspf, smooth, 1.0-smooth, 10);
00162 }else
00163 {
00164 q->octave_count = 0;
00165
00166 tmp_lspf = 0.;
00167 for(i=0; i<5 ; i++)
00168 {
00169 lspf[2*i+0] = tmp_lspf += qcelp_lspvq[i][q->frame.lspv[i]][0] * 0.0001;
00170 lspf[2*i+1] = tmp_lspf += qcelp_lspvq[i][q->frame.lspv[i]][1] * 0.0001;
00171 }
00172
00173
00174 if(q->bitrate == RATE_QUARTER)
00175 {
00176 if(lspf[9] <= .70 || lspf[9] >= .97)
00177 return -1;
00178 for(i=3; i<10; i++)
00179 if(fabs(lspf[i] - lspf[i-2]) < .08)
00180 return -1;
00181 }else
00182 {
00183 if(lspf[9] <= .66 || lspf[9] >= .985)
00184 return -1;
00185 for(i=4; i<10; i++)
00186 if (fabs(lspf[i] - lspf[i-4]) < .0931)
00187 return -1;
00188 }
00189 }
00190 return 0;
00191 }
00192
00201 static void decode_gain_and_index(QCELPContext *q,
00202 float *gain) {
00203 int i, subframes_count, g1[16];
00204 float slope;
00205
00206 if(q->bitrate >= RATE_QUARTER)
00207 {
00208 switch(q->bitrate)
00209 {
00210 case RATE_FULL: subframes_count = 16; break;
00211 case RATE_HALF: subframes_count = 4; break;
00212 default: subframes_count = 5;
00213 }
00214 for(i=0; i<subframes_count; i++)
00215 {
00216 g1[i] = 4 * q->frame.cbgain[i];
00217 if(q->bitrate == RATE_FULL && !((i+1) & 3))
00218 {
00219 g1[i] += av_clip((g1[i-1] + g1[i-2] + g1[i-3]) / 3 - 6, 0, 32);
00220 }
00221
00222 gain[i] = qcelp_g12ga[g1[i]];
00223
00224 if(q->frame.cbsign[i])
00225 {
00226 gain[i] = -gain[i];
00227 q->frame.cindex[i] = (q->frame.cindex[i]-89) & 127;
00228 }
00229 }
00230
00231 q->prev_g1[0] = g1[i-2];
00232 q->prev_g1[1] = g1[i-1];
00233 q->last_codebook_gain = qcelp_g12ga[g1[i-1]];
00234
00235 if(q->bitrate == RATE_QUARTER)
00236 {
00237
00238 gain[7] = gain[4];
00239 gain[6] = 0.4*gain[3] + 0.6*gain[4];
00240 gain[5] = gain[3];
00241 gain[4] = 0.8*gain[2] + 0.2*gain[3];
00242 gain[3] = 0.2*gain[1] + 0.8*gain[2];
00243 gain[2] = gain[1];
00244 gain[1] = 0.6*gain[0] + 0.4*gain[1];
00245 }
00246 }else if (q->bitrate != SILENCE)
00247 {
00248 if(q->bitrate == RATE_OCTAVE)
00249 {
00250 g1[0] = 2 * q->frame.cbgain[0]
00251 + av_clip((q->prev_g1[0] + q->prev_g1[1]) / 2 - 5, 0, 54);
00252 subframes_count = 8;
00253 }else
00254 {
00255 assert(q->bitrate == I_F_Q);
00256
00257 g1[0] = q->prev_g1[1];
00258 switch(q->erasure_count)
00259 {
00260 case 1 : break;
00261 case 2 : g1[0] -= 1; break;
00262 case 3 : g1[0] -= 2; break;
00263 default: g1[0] -= 6;
00264 }
00265 if(g1[0] < 0)
00266 g1[0] = 0;
00267 subframes_count = 4;
00268 }
00269
00270 slope = 0.5*(qcelp_g12ga[g1[0]] - q->last_codebook_gain) / subframes_count;
00271 for(i=1; i<=subframes_count; i++)
00272 gain[i-1] = q->last_codebook_gain + slope * i;
00273
00274 q->last_codebook_gain = gain[i-2];
00275 q->prev_g1[0] = q->prev_g1[1];
00276 q->prev_g1[1] = g1[0];
00277 }
00278 }
00279
00289 static int codebook_sanity_check_for_rate_quarter(const uint8_t *cbgain)
00290 {
00291 int i, diff, prev_diff=0;
00292
00293 for(i=1; i<5; i++)
00294 {
00295 diff = cbgain[i] - cbgain[i-1];
00296 if(FFABS(diff) > 10)
00297 return -1;
00298 else if(FFABS(diff - prev_diff) > 12)
00299 return -1;
00300 prev_diff = diff;
00301 }
00302 return 0;
00303 }
00304
00326 static void compute_svector(QCELPContext *q, const float *gain,
00327 float *cdn_vector)
00328 {
00329 int i, j, k;
00330 uint16_t cbseed, cindex;
00331 float *rnd, tmp_gain, fir_filter_value;
00332
00333 switch(q->bitrate)
00334 {
00335 case RATE_FULL:
00336 for(i=0; i<16; i++)
00337 {
00338 tmp_gain = gain[i] * QCELP_RATE_FULL_CODEBOOK_RATIO;
00339 cindex = -q->frame.cindex[i];
00340 for(j=0; j<10; j++)
00341 *cdn_vector++ = tmp_gain * qcelp_rate_full_codebook[cindex++ & 127];
00342 }
00343 break;
00344 case RATE_HALF:
00345 for(i=0; i<4; i++)
00346 {
00347 tmp_gain = gain[i] * QCELP_RATE_HALF_CODEBOOK_RATIO;
00348 cindex = -q->frame.cindex[i];
00349 for (j = 0; j < 40; j++)
00350 *cdn_vector++ = tmp_gain * qcelp_rate_half_codebook[cindex++ & 127];
00351 }
00352 break;
00353 case RATE_QUARTER:
00354 cbseed = (0x0003 & q->frame.lspv[4])<<14 |
00355 (0x003F & q->frame.lspv[3])<< 8 |
00356 (0x0060 & q->frame.lspv[2])<< 1 |
00357 (0x0007 & q->frame.lspv[1])<< 3 |
00358 (0x0038 & q->frame.lspv[0])>> 3 ;
00359 rnd = q->rnd_fir_filter_mem + 20;
00360 for(i=0; i<8; i++)
00361 {
00362 tmp_gain = gain[i] * (QCELP_SQRT1887 / 32768.0);
00363 for(k=0; k<20; k++)
00364 {
00365 cbseed = 521 * cbseed + 259;
00366 *rnd = (int16_t)cbseed;
00367
00368
00369 fir_filter_value = 0.0;
00370 for(j=0; j<10; j++)
00371 fir_filter_value += qcelp_rnd_fir_coefs[j ]
00372 * (rnd[-j ] + rnd[-20+j]);
00373
00374 fir_filter_value += qcelp_rnd_fir_coefs[10] * rnd[-10];
00375 *cdn_vector++ = tmp_gain * fir_filter_value;
00376 rnd++;
00377 }
00378 }
00379 memcpy(q->rnd_fir_filter_mem, q->rnd_fir_filter_mem + 160, 20 * sizeof(float));
00380 break;
00381 case RATE_OCTAVE:
00382 cbseed = q->first16bits;
00383 for(i=0; i<8; i++)
00384 {
00385 tmp_gain = gain[i] * (QCELP_SQRT1887 / 32768.0);
00386 for(j=0; j<20; j++)
00387 {
00388 cbseed = 521 * cbseed + 259;
00389 *cdn_vector++ = tmp_gain * (int16_t)cbseed;
00390 }
00391 }
00392 break;
00393 case I_F_Q:
00394 cbseed = -44;
00395 for(i=0; i<4; i++)
00396 {
00397 tmp_gain = gain[i] * QCELP_RATE_FULL_CODEBOOK_RATIO;
00398 for(j=0; j<40; j++)
00399 *cdn_vector++ = tmp_gain * qcelp_rate_full_codebook[cbseed++ & 127];
00400 }
00401 break;
00402 case SILENCE:
00403 memset(cdn_vector, 0, 160 * sizeof(float));
00404 break;
00405 }
00406 }
00407
00417 static void apply_gain_ctrl(float *v_out, const float *v_ref,
00418 const float *v_in)
00419 {
00420 int i;
00421
00422 for (i = 0; i < 160; i += 40)
00423 ff_scale_vector_to_given_sum_of_squares(v_out + i, v_in + i,
00424 ff_dot_productf(v_ref + i,
00425 v_ref + i, 40),
00426 40);
00427 }
00428
00446 static const float *do_pitchfilter(float memory[303], const float v_in[160],
00447 const float gain[4], const uint8_t *lag,
00448 const uint8_t pfrac[4])
00449 {
00450 int i, j;
00451 float *v_lag, *v_out;
00452 const float *v_len;
00453
00454 v_out = memory + 143;
00455
00456 for(i=0; i<4; i++)
00457 {
00458 if(gain[i])
00459 {
00460 v_lag = memory + 143 + 40 * i - lag[i];
00461 for(v_len=v_in+40; v_in<v_len; v_in++)
00462 {
00463 if(pfrac[i])
00464 {
00465 for(j=0, *v_out=0.; j<4; j++)
00466 *v_out += qcelp_hammsinc_table[j] * (v_lag[j-4] + v_lag[3-j]);
00467 }else
00468 *v_out = *v_lag;
00469
00470 *v_out = *v_in + gain[i] * *v_out;
00471
00472 v_lag++;
00473 v_out++;
00474 }
00475 }else
00476 {
00477 memcpy(v_out, v_in, 40 * sizeof(float));
00478 v_in += 40;
00479 v_out += 40;
00480 }
00481 }
00482
00483 memmove(memory, memory + 160, 143 * sizeof(float));
00484 return memory + 143;
00485 }
00486
00494 static void apply_pitch_filters(QCELPContext *q, float *cdn_vector)
00495 {
00496 int i;
00497 const float *v_synthesis_filtered, *v_pre_filtered;
00498
00499 if(q->bitrate >= RATE_HALF ||
00500 q->bitrate == SILENCE ||
00501 (q->bitrate == I_F_Q && (q->prev_bitrate >= RATE_HALF)))
00502 {
00503
00504 if(q->bitrate >= RATE_HALF)
00505 {
00506
00507
00508 for(i=0; i<4; i++)
00509 {
00510 q->pitch_gain[i] = q->frame.plag[i] ? (q->frame.pgain[i] + 1) * 0.25 : 0.0;
00511
00512 q->pitch_lag[i] = q->frame.plag[i] + 16;
00513 }
00514 }else
00515 {
00516 float max_pitch_gain;
00517
00518 if (q->bitrate == I_F_Q)
00519 {
00520 if (q->erasure_count < 3)
00521 max_pitch_gain = 0.9 - 0.3 * (q->erasure_count - 1);
00522 else
00523 max_pitch_gain = 0.0;
00524 }else
00525 {
00526 assert(q->bitrate == SILENCE);
00527 max_pitch_gain = 1.0;
00528 }
00529 for(i=0; i<4; i++)
00530 q->pitch_gain[i] = FFMIN(q->pitch_gain[i], max_pitch_gain);
00531
00532 memset(q->frame.pfrac, 0, sizeof(q->frame.pfrac));
00533 }
00534
00535
00536 v_synthesis_filtered = do_pitchfilter(q->pitch_synthesis_filter_mem,
00537 cdn_vector, q->pitch_gain,
00538 q->pitch_lag, q->frame.pfrac);
00539
00540
00541 for(i=0; i<4; i++)
00542 q->pitch_gain[i] = 0.5 * FFMIN(q->pitch_gain[i], 1.0);
00543
00544 v_pre_filtered = do_pitchfilter(q->pitch_pre_filter_mem,
00545 v_synthesis_filtered,
00546 q->pitch_gain, q->pitch_lag,
00547 q->frame.pfrac);
00548
00549 apply_gain_ctrl(cdn_vector, v_synthesis_filtered, v_pre_filtered);
00550 }else
00551 {
00552 memcpy(q->pitch_synthesis_filter_mem, cdn_vector + 17,
00553 143 * sizeof(float));
00554 memcpy(q->pitch_pre_filter_mem, cdn_vector + 17, 143 * sizeof(float));
00555 memset(q->pitch_gain, 0, sizeof(q->pitch_gain));
00556 memset(q->pitch_lag, 0, sizeof(q->pitch_lag));
00557 }
00558 }
00559
00572 static void lspf2lpc(const float *lspf, float *lpc)
00573 {
00574 double lsp[10];
00575 double bandwidth_expansion_coeff = QCELP_BANDWIDTH_EXPANSION_COEFF;
00576 int i;
00577
00578 for (i=0; i<10; i++)
00579 lsp[i] = cos(M_PI * lspf[i]);
00580
00581 ff_acelp_lspd2lpc(lsp, lpc, 5);
00582
00583 for (i=0; i<10; i++)
00584 {
00585 lpc[i] *= bandwidth_expansion_coeff;
00586 bandwidth_expansion_coeff *= QCELP_BANDWIDTH_EXPANSION_COEFF;
00587 }
00588 }
00589
00601 static void interpolate_lpc(QCELPContext *q, const float *curr_lspf,
00602 float *lpc, const int subframe_num)
00603 {
00604 float interpolated_lspf[10];
00605 float weight;
00606
00607 if(q->bitrate >= RATE_QUARTER)
00608 weight = 0.25 * (subframe_num + 1);
00609 else if(q->bitrate == RATE_OCTAVE && !subframe_num)
00610 weight = 0.625;
00611 else
00612 weight = 1.0;
00613
00614 if(weight != 1.0)
00615 {
00616 ff_weighted_vector_sumf(interpolated_lspf, curr_lspf, q->prev_lspf,
00617 weight, 1.0 - weight, 10);
00618 lspf2lpc(interpolated_lspf, lpc);
00619 }else if(q->bitrate >= RATE_QUARTER ||
00620 (q->bitrate == I_F_Q && !subframe_num))
00621 lspf2lpc(curr_lspf, lpc);
00622 else if(q->bitrate == SILENCE && !subframe_num)
00623 lspf2lpc(q->prev_lspf, lpc);
00624 }
00625
00626 static qcelp_packet_rate buf_size2bitrate(const int buf_size)
00627 {
00628 switch(buf_size)
00629 {
00630 case 35: return RATE_FULL;
00631 case 17: return RATE_HALF;
00632 case 8: return RATE_QUARTER;
00633 case 4: return RATE_OCTAVE;
00634 case 1: return SILENCE;
00635 }
00636
00637 return I_F_Q;
00638 }
00639
00652 static qcelp_packet_rate determine_bitrate(AVCodecContext *avctx, const int buf_size,
00653 const uint8_t **buf)
00654 {
00655 qcelp_packet_rate bitrate;
00656
00657 if((bitrate = buf_size2bitrate(buf_size)) >= 0)
00658 {
00659 if(bitrate > **buf)
00660 {
00661 QCELPContext *q = avctx->priv_data;
00662 if (!q->warned_buf_mismatch_bitrate)
00663 {
00664 av_log(avctx, AV_LOG_WARNING,
00665 "Claimed bitrate and buffer size mismatch.\n");
00666 q->warned_buf_mismatch_bitrate = 1;
00667 }
00668 bitrate = **buf;
00669 }else if(bitrate < **buf)
00670 {
00671 av_log(avctx, AV_LOG_ERROR,
00672 "Buffer is too small for the claimed bitrate.\n");
00673 return I_F_Q;
00674 }
00675 (*buf)++;
00676 }else if((bitrate = buf_size2bitrate(buf_size + 1)) >= 0)
00677 {
00678 av_log(avctx, AV_LOG_WARNING,
00679 "Bitrate byte is missing, guessing the bitrate from packet size.\n");
00680 }else
00681 return I_F_Q;
00682
00683 if(bitrate == SILENCE)
00684 {
00685
00686 av_log_ask_for_sample(avctx, "'Blank frame handling is experimental.");
00687 }
00688 return bitrate;
00689 }
00690
00691 static void warn_insufficient_frame_quality(AVCodecContext *avctx,
00692 const char *message)
00693 {
00694 av_log(avctx, AV_LOG_WARNING, "Frame #%d, IFQ: %s\n", avctx->frame_number,
00695 message);
00696 }
00697
00698 static int qcelp_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
00699 AVPacket *avpkt)
00700 {
00701 const uint8_t *buf = avpkt->data;
00702 int buf_size = avpkt->size;
00703 QCELPContext *q = avctx->priv_data;
00704 float *outbuffer = data;
00705 int i;
00706 float quantized_lspf[10], lpc[10];
00707 float gain[16];
00708 float *formant_mem;
00709
00710 if((q->bitrate = determine_bitrate(avctx, buf_size, &buf)) == I_F_Q)
00711 {
00712 warn_insufficient_frame_quality(avctx, "bitrate cannot be determined.");
00713 goto erasure;
00714 }
00715
00716 if(q->bitrate == RATE_OCTAVE &&
00717 (q->first16bits = AV_RB16(buf)) == 0xFFFF)
00718 {
00719 warn_insufficient_frame_quality(avctx, "Bitrate is 1/8 and first 16 bits are on.");
00720 goto erasure;
00721 }
00722
00723 if(q->bitrate > SILENCE)
00724 {
00725 const QCELPBitmap *bitmaps = qcelp_unpacking_bitmaps_per_rate[q->bitrate];
00726 const QCELPBitmap *bitmaps_end = qcelp_unpacking_bitmaps_per_rate[q->bitrate]
00727 + qcelp_unpacking_bitmaps_lengths[q->bitrate];
00728 uint8_t *unpacked_data = (uint8_t *)&q->frame;
00729
00730 init_get_bits(&q->gb, buf, 8*buf_size);
00731
00732 memset(&q->frame, 0, sizeof(QCELPFrame));
00733
00734 for(; bitmaps < bitmaps_end; bitmaps++)
00735 unpacked_data[bitmaps->index] |= get_bits(&q->gb, bitmaps->bitlen) << bitmaps->bitpos;
00736
00737
00738 if(q->frame.reserved)
00739 {
00740 warn_insufficient_frame_quality(avctx, "Wrong data in reserved frame area.");
00741 goto erasure;
00742 }
00743 if(q->bitrate == RATE_QUARTER &&
00744 codebook_sanity_check_for_rate_quarter(q->frame.cbgain))
00745 {
00746 warn_insufficient_frame_quality(avctx, "Codebook gain sanity check failed.");
00747 goto erasure;
00748 }
00749
00750 if(q->bitrate >= RATE_HALF)
00751 {
00752 for(i=0; i<4; i++)
00753 {
00754 if(q->frame.pfrac[i] && q->frame.plag[i] >= 124)
00755 {
00756 warn_insufficient_frame_quality(avctx, "Cannot initialize pitch filter.");
00757 goto erasure;
00758 }
00759 }
00760 }
00761 }
00762
00763 decode_gain_and_index(q, gain);
00764 compute_svector(q, gain, outbuffer);
00765
00766 if(decode_lspf(q, quantized_lspf) < 0)
00767 {
00768 warn_insufficient_frame_quality(avctx, "Badly received packets in frame.");
00769 goto erasure;
00770 }
00771
00772
00773 apply_pitch_filters(q, outbuffer);
00774
00775 if(q->bitrate == I_F_Q)
00776 {
00777 erasure:
00778 q->bitrate = I_F_Q;
00779 q->erasure_count++;
00780 decode_gain_and_index(q, gain);
00781 compute_svector(q, gain, outbuffer);
00782 decode_lspf(q, quantized_lspf);
00783 apply_pitch_filters(q, outbuffer);
00784 }else
00785 q->erasure_count = 0;
00786
00787 formant_mem = q->formant_mem + 10;
00788 for(i=0; i<4; i++)
00789 {
00790 interpolate_lpc(q, quantized_lspf, lpc, i);
00791 ff_celp_lp_synthesis_filterf(formant_mem, lpc, outbuffer + i * 40, 40,
00792 10);
00793 formant_mem += 40;
00794 }
00795 memcpy(q->formant_mem, q->formant_mem + 160, 10 * sizeof(float));
00796
00797
00798
00799
00800 formant_mem = q->formant_mem + 10;
00801 for(i=0; i<160; i++)
00802 *outbuffer++ = av_clipf(*formant_mem++, QCELP_CLIP_LOWER_BOUND,
00803 QCELP_CLIP_UPPER_BOUND);
00804
00805 memcpy(q->prev_lspf, quantized_lspf, sizeof(q->prev_lspf));
00806 q->prev_bitrate = q->bitrate;
00807
00808 *data_size = 160 * sizeof(*outbuffer);
00809
00810 return *data_size;
00811 }
00812
00813 AVCodec qcelp_decoder =
00814 {
00815 .name = "qcelp",
00816 .type = AVMEDIA_TYPE_AUDIO,
00817 .id = CODEC_ID_QCELP,
00818 .init = qcelp_decode_init,
00819 .decode = qcelp_decode_frame,
00820 .priv_data_size = sizeof(QCELPContext),
00821 .long_name = NULL_IF_CONFIG_SMALL("QCELP / PureVoice"),
00822 };