* QCELP decoder
* Copyright (c) 2007 Reynaldo H. Verdejo Pinochet
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
* @file
* QCELP decoder
* @author Reynaldo H. Verdejo Pinochet
- * @remark FFmpeg merging spearheaded by Kenan Gillet
+ * @remark Libav merging spearheaded by Kenan Gillet
* @remark Development mentored by Benjamin Larson
*/
#include <stddef.h>
+#include "libavutil/channel_layout.h"
+#include "libavutil/float_dsp.h"
#include "avcodec.h"
#include "internal.h"
#include "get_bits.h"
-
#include "qcelpdata.h"
-
-#include "celp_math.h"
#include "celp_filters.h"
#include "acelp_filters.h"
#include "acelp_vectors.h"
#undef NDEBUG
#include <assert.h>
-typedef enum
-{
- I_F_Q = -1, /*!< insufficient frame quality */
+typedef enum {
+ I_F_Q = -1, /**< insufficient frame quality */
SILENCE,
RATE_OCTAVE,
RATE_QUARTER,
RATE_FULL
} qcelp_packet_rate;
-typedef struct
-{
+typedef struct QCELPContext {
GetBitContext gb;
qcelp_packet_rate bitrate;
- QCELPFrame frame; /*!< unpacked data frame */
+ QCELPFrame frame; /**< unpacked data frame */
uint8_t erasure_count;
- uint8_t octave_count; /*!< count the consecutive RATE_OCTAVE frames */
+ uint8_t octave_count; /**< count the consecutive RATE_OCTAVE frames */
float prev_lspf[10];
- float predictor_lspf[10];/*!< LSP predictor for RATE_OCTAVE and I_F_Q */
+ float predictor_lspf[10];/**< LSP predictor for RATE_OCTAVE and I_F_Q */
float pitch_synthesis_filter_mem[303];
float pitch_pre_filter_mem[303];
float rnd_fir_filter_mem[180];
QCELPContext *q = avctx->priv_data;
int i;
- avctx->sample_fmt = SAMPLE_FMT_FLT;
+ avctx->channels = 1;
+ avctx->channel_layout = AV_CH_LAYOUT_MONO;
+ avctx->sample_fmt = AV_SAMPLE_FMT_FLT;
- for(i=0; i<10; i++)
- q->prev_lspf[i] = (i+1)/11.;
+ for (i = 0; i < 10; i++)
+ q->prev_lspf[i] = (i + 1) / 11.0;
return 0;
}
float tmp_lspf, smooth, erasure_coeff;
const float *predictors;
- if(q->bitrate == RATE_OCTAVE || q->bitrate == I_F_Q)
- {
- predictors = (q->prev_bitrate != RATE_OCTAVE &&
- q->prev_bitrate != I_F_Q ?
- q->prev_lspf : q->predictor_lspf);
+ if (q->bitrate == RATE_OCTAVE || q->bitrate == I_F_Q) {
+ predictors = q->prev_bitrate != RATE_OCTAVE &&
+ q->prev_bitrate != I_F_Q ? q->prev_lspf
+ : q->predictor_lspf;
- if(q->bitrate == RATE_OCTAVE)
- {
+ if (q->bitrate == RATE_OCTAVE) {
q->octave_count++;
- for(i=0; i<10; i++)
- {
+ for (i = 0; i < 10; i++) {
q->predictor_lspf[i] =
lspf[i] = (q->frame.lspv[i] ? QCELP_LSP_SPREAD_FACTOR
- : -QCELP_LSP_SPREAD_FACTOR)
- + predictors[i] * QCELP_LSP_OCTAVE_PREDICTOR
- + (i + 1) * ((1 - QCELP_LSP_OCTAVE_PREDICTOR)/11);
+ : -QCELP_LSP_SPREAD_FACTOR) +
+ predictors[i] * QCELP_LSP_OCTAVE_PREDICTOR +
+ (i + 1) * ((1 - QCELP_LSP_OCTAVE_PREDICTOR) / 11);
}
- smooth = (q->octave_count < 10 ? .875 : 0.1);
- }else
- {
+ smooth = q->octave_count < 10 ? .875 : 0.1;
+ } else {
erasure_coeff = QCELP_LSP_OCTAVE_PREDICTOR;
assert(q->bitrate == I_F_Q);
- if(q->erasure_count > 1)
- erasure_coeff *= (q->erasure_count < 4 ? 0.9 : 0.7);
+ if (q->erasure_count > 1)
+ erasure_coeff *= q->erasure_count < 4 ? 0.9 : 0.7;
- for(i=0; i<10; i++)
- {
+ for (i = 0; i < 10; i++) {
q->predictor_lspf[i] =
- lspf[i] = (i + 1) * ( 1 - erasure_coeff)/11
- + erasure_coeff * predictors[i];
+ lspf[i] = (i + 1) * (1 - erasure_coeff) / 11 +
+ erasure_coeff * predictors[i];
}
smooth = 0.125;
}
// Check the stability of the LSP frequencies.
lspf[0] = FFMAX(lspf[0], QCELP_LSP_SPREAD_FACTOR);
- for(i=1; i<10; i++)
- lspf[i] = FFMAX(lspf[i], (lspf[i-1] + QCELP_LSP_SPREAD_FACTOR));
+ for (i = 1; i < 10; i++)
+ lspf[i] = FFMAX(lspf[i], lspf[i - 1] + QCELP_LSP_SPREAD_FACTOR);
- lspf[9] = FFMIN(lspf[9], (1.0 - QCELP_LSP_SPREAD_FACTOR));
- for(i=9; i>0; i--)
- lspf[i-1] = FFMIN(lspf[i-1], (lspf[i] - QCELP_LSP_SPREAD_FACTOR));
+ lspf[9] = FFMIN(lspf[9], 1.0 - QCELP_LSP_SPREAD_FACTOR);
+ for (i = 9; i > 0; i--)
+ lspf[i - 1] = FFMIN(lspf[i - 1], lspf[i] - QCELP_LSP_SPREAD_FACTOR);
// Low-pass filter the LSP frequencies.
- ff_weighted_vector_sumf(lspf, lspf, q->prev_lspf, smooth, 1.0-smooth, 10);
- }else
- {
+ ff_weighted_vector_sumf(lspf, lspf, q->prev_lspf, smooth, 1.0 - smooth, 10);
+ } else {
q->octave_count = 0;
- tmp_lspf = 0.;
- for(i=0; i<5 ; i++)
- {
- lspf[2*i+0] = tmp_lspf += qcelp_lspvq[i][q->frame.lspv[i]][0] * 0.0001;
- lspf[2*i+1] = tmp_lspf += qcelp_lspvq[i][q->frame.lspv[i]][1] * 0.0001;
+ tmp_lspf = 0.0;
+ for (i = 0; i < 5; i++) {
+ lspf[2 * i + 0] = tmp_lspf += qcelp_lspvq[i][q->frame.lspv[i]][0] * 0.0001;
+ lspf[2 * i + 1] = tmp_lspf += qcelp_lspvq[i][q->frame.lspv[i]][1] * 0.0001;
}
// Check for badly received packets.
- if(q->bitrate == RATE_QUARTER)
- {
- if(lspf[9] <= .70 || lspf[9] >= .97)
+ if (q->bitrate == RATE_QUARTER) {
+ if (lspf[9] <= .70 || lspf[9] >= .97)
return -1;
- for(i=3; i<10; i++)
- if(fabs(lspf[i] - lspf[i-2]) < .08)
+ for (i = 3; i < 10; i++)
+ if (fabs(lspf[i] - lspf[i - 2]) < .08)
return -1;
- }else
- {
- if(lspf[9] <= .66 || lspf[9] >= .985)
+ } else {
+ if (lspf[9] <= .66 || lspf[9] >= .985)
return -1;
- for(i=4; i<10; i++)
- if (fabs(lspf[i] - lspf[i-4]) < .0931)
+ for (i = 4; i < 10; i++)
+ if (fabs(lspf[i] - lspf[i - 4]) < .0931)
return -1;
}
}
*
* TIA/EIA/IS-733 2.4.6.2
*/
-static void decode_gain_and_index(QCELPContext *q,
- float *gain) {
- int i, subframes_count, g1[16];
+static void decode_gain_and_index(QCELPContext *q, float *gain)
+{
+ int i, subframes_count, g1[16];
float slope;
- if(q->bitrate >= RATE_QUARTER)
- {
- switch(q->bitrate)
- {
- case RATE_FULL: subframes_count = 16; break;
- case RATE_HALF: subframes_count = 4; break;
- default: subframes_count = 5;
+ if (q->bitrate >= RATE_QUARTER) {
+ switch (q->bitrate) {
+ case RATE_FULL: subframes_count = 16; break;
+ case RATE_HALF: subframes_count = 4; break;
+ default: subframes_count = 5;
}
- for(i=0; i<subframes_count; i++)
- {
+ for (i = 0; i < subframes_count; i++) {
g1[i] = 4 * q->frame.cbgain[i];
- if(q->bitrate == RATE_FULL && !((i+1) & 3))
- {
- g1[i] += av_clip((g1[i-1] + g1[i-2] + g1[i-3]) / 3 - 6, 0, 32);
+ if (q->bitrate == RATE_FULL && !((i + 1) & 3)) {
+ g1[i] += av_clip((g1[i - 1] + g1[i - 2] + g1[i - 3]) / 3 - 6, 0, 32);
}
gain[i] = qcelp_g12ga[g1[i]];
- if(q->frame.cbsign[i])
- {
+ if (q->frame.cbsign[i]) {
gain[i] = -gain[i];
- q->frame.cindex[i] = (q->frame.cindex[i]-89) & 127;
+ q->frame.cindex[i] = (q->frame.cindex[i] - 89) & 127;
}
}
- q->prev_g1[0] = g1[i-2];
- q->prev_g1[1] = g1[i-1];
- q->last_codebook_gain = qcelp_g12ga[g1[i-1]];
+ q->prev_g1[0] = g1[i - 2];
+ q->prev_g1[1] = g1[i - 1];
+ q->last_codebook_gain = qcelp_g12ga[g1[i - 1]];
- if(q->bitrate == RATE_QUARTER)
- {
+ if (q->bitrate == RATE_QUARTER) {
// Provide smoothing of the unvoiced excitation energy.
- gain[7] = gain[4];
- gain[6] = 0.4*gain[3] + 0.6*gain[4];
- gain[5] = gain[3];
- gain[4] = 0.8*gain[2] + 0.2*gain[3];
- gain[3] = 0.2*gain[1] + 0.8*gain[2];
- gain[2] = gain[1];
- gain[1] = 0.6*gain[0] + 0.4*gain[1];
+ gain[7] = gain[4];
+ gain[6] = 0.4 * gain[3] + 0.6 * gain[4];
+ gain[5] = gain[3];
+ gain[4] = 0.8 * gain[2] + 0.2 * gain[3];
+ gain[3] = 0.2 * gain[1] + 0.8 * gain[2];
+ gain[2] = gain[1];
+ gain[1] = 0.6 * gain[0] + 0.4 * gain[1];
}
- }else if (q->bitrate != SILENCE)
- {
- if(q->bitrate == RATE_OCTAVE)
- {
- g1[0] = 2 * q->frame.cbgain[0]
- + av_clip((q->prev_g1[0] + q->prev_g1[1]) / 2 - 5, 0, 54);
+ } else if (q->bitrate != SILENCE) {
+ if (q->bitrate == RATE_OCTAVE) {
+ g1[0] = 2 * q->frame.cbgain[0] +
+ av_clip((q->prev_g1[0] + q->prev_g1[1]) / 2 - 5, 0, 54);
subframes_count = 8;
- }else
- {
+ } else {
assert(q->bitrate == I_F_Q);
g1[0] = q->prev_g1[1];
- switch(q->erasure_count)
- {
- case 1 : break;
- case 2 : g1[0] -= 1; break;
- case 3 : g1[0] -= 2; break;
- default: g1[0] -= 6;
+ switch (q->erasure_count) {
+ case 1 : break;
+ case 2 : g1[0] -= 1; break;
+ case 3 : g1[0] -= 2; break;
+ default: g1[0] -= 6;
}
- if(g1[0] < 0)
+ if (g1[0] < 0)
g1[0] = 0;
subframes_count = 4;
}
// This interpolation is done to produce smoother background noise.
- slope = 0.5*(qcelp_g12ga[g1[0]] - q->last_codebook_gain) / subframes_count;
- for(i=1; i<=subframes_count; i++)
- gain[i-1] = q->last_codebook_gain + slope * i;
+ slope = 0.5 * (qcelp_g12ga[g1[0]] - q->last_codebook_gain) / subframes_count;
+ for (i = 1; i <= subframes_count; i++)
+ gain[i - 1] = q->last_codebook_gain + slope * i;
- q->last_codebook_gain = gain[i-2];
- q->prev_g1[0] = q->prev_g1[1];
- q->prev_g1[1] = g1[0];
+ q->last_codebook_gain = gain[i - 2];
+ q->prev_g1[0] = q->prev_g1[1];
+ q->prev_g1[1] = g1[0];
}
}
*/
static int codebook_sanity_check_for_rate_quarter(const uint8_t *cbgain)
{
- int i, diff, prev_diff=0;
+ int i, diff, prev_diff = 0;
- for(i=1; i<5; i++)
- {
+ for (i = 1; i < 5; i++) {
diff = cbgain[i] - cbgain[i-1];
- if(FFABS(diff) > 10)
+ if (FFABS(diff) > 10)
return -1;
- else if(FFABS(diff - prev_diff) > 12)
+ else if (FFABS(diff - prev_diff) > 12)
return -1;
prev_diff = diff;
}
static void compute_svector(QCELPContext *q, const float *gain,
float *cdn_vector)
{
- int i, j, k;
+ int i, j, k;
uint16_t cbseed, cindex;
- float *rnd, tmp_gain, fir_filter_value;
-
- switch(q->bitrate)
- {
- case RATE_FULL:
- for(i=0; i<16; i++)
- {
- tmp_gain = gain[i] * QCELP_RATE_FULL_CODEBOOK_RATIO;
- cindex = -q->frame.cindex[i];
- for(j=0; j<10; j++)
- *cdn_vector++ = tmp_gain * qcelp_rate_full_codebook[cindex++ & 127];
- }
+ float *rnd, tmp_gain, fir_filter_value;
+
+ switch (q->bitrate) {
+ case RATE_FULL:
+ for (i = 0; i < 16; i++) {
+ tmp_gain = gain[i] * QCELP_RATE_FULL_CODEBOOK_RATIO;
+ cindex = -q->frame.cindex[i];
+ for (j = 0; j < 10; j++)
+ *cdn_vector++ = tmp_gain * qcelp_rate_full_codebook[cindex++ & 127];
+ }
break;
- case RATE_HALF:
- for(i=0; i<4; i++)
- {
- tmp_gain = gain[i] * QCELP_RATE_HALF_CODEBOOK_RATIO;
- cindex = -q->frame.cindex[i];
- for (j = 0; j < 40; j++)
+ case RATE_HALF:
+ for (i = 0; i < 4; i++) {
+ tmp_gain = gain[i] * QCELP_RATE_HALF_CODEBOOK_RATIO;
+ cindex = -q->frame.cindex[i];
+ for (j = 0; j < 40; j++)
*cdn_vector++ = tmp_gain * qcelp_rate_half_codebook[cindex++ & 127];
- }
+ }
break;
- case RATE_QUARTER:
- cbseed = (0x0003 & q->frame.lspv[4])<<14 |
- (0x003F & q->frame.lspv[3])<< 8 |
- (0x0060 & q->frame.lspv[2])<< 1 |
- (0x0007 & q->frame.lspv[1])<< 3 |
- (0x0038 & q->frame.lspv[0])>> 3 ;
- rnd = q->rnd_fir_filter_mem + 20;
- for(i=0; i<8; i++)
- {
- tmp_gain = gain[i] * (QCELP_SQRT1887 / 32768.0);
- for(k=0; k<20; k++)
- {
- cbseed = 521 * cbseed + 259;
- *rnd = (int16_t)cbseed;
+ case RATE_QUARTER:
+ cbseed = (0x0003 & q->frame.lspv[4]) << 14 |
+ (0x003F & q->frame.lspv[3]) << 8 |
+ (0x0060 & q->frame.lspv[2]) << 1 |
+ (0x0007 & q->frame.lspv[1]) << 3 |
+ (0x0038 & q->frame.lspv[0]) >> 3;
+ rnd = q->rnd_fir_filter_mem + 20;
+ for (i = 0; i < 8; i++) {
+ tmp_gain = gain[i] * (QCELP_SQRT1887 / 32768.0);
+ for (k = 0; k < 20; k++) {
+ cbseed = 521 * cbseed + 259;
+ *rnd = (int16_t) cbseed;
// FIR filter
- fir_filter_value = 0.0;
- for(j=0; j<10; j++)
- fir_filter_value += qcelp_rnd_fir_coefs[j ]
- * (rnd[-j ] + rnd[-20+j]);
-
- fir_filter_value += qcelp_rnd_fir_coefs[10] * rnd[-10];
- *cdn_vector++ = tmp_gain * fir_filter_value;
- rnd++;
- }
+ fir_filter_value = 0.0;
+ for (j = 0; j < 10; j++)
+ fir_filter_value += qcelp_rnd_fir_coefs[j] *
+ (rnd[-j] + rnd[-20+j]);
+
+ fir_filter_value += qcelp_rnd_fir_coefs[10] * rnd[-10];
+ *cdn_vector++ = tmp_gain * fir_filter_value;
+ rnd++;
}
- memcpy(q->rnd_fir_filter_mem, q->rnd_fir_filter_mem + 160, 20 * sizeof(float));
+ }
+ memcpy(q->rnd_fir_filter_mem, q->rnd_fir_filter_mem + 160,
+ 20 * sizeof(float));
break;
- case RATE_OCTAVE:
- cbseed = q->first16bits;
- for(i=0; i<8; i++)
- {
- tmp_gain = gain[i] * (QCELP_SQRT1887 / 32768.0);
- for(j=0; j<20; j++)
- {
- cbseed = 521 * cbseed + 259;
- *cdn_vector++ = tmp_gain * (int16_t)cbseed;
- }
+ case RATE_OCTAVE:
+ cbseed = q->first16bits;
+ for (i = 0; i < 8; i++) {
+ tmp_gain = gain[i] * (QCELP_SQRT1887 / 32768.0);
+ for (j = 0; j < 20; j++) {
+ cbseed = 521 * cbseed + 259;
+ *cdn_vector++ = tmp_gain * (int16_t) cbseed;
}
+ }
break;
- case I_F_Q:
- cbseed = -44; // random codebook index
- for(i=0; i<4; i++)
- {
- tmp_gain = gain[i] * QCELP_RATE_FULL_CODEBOOK_RATIO;
- for(j=0; j<40; j++)
- *cdn_vector++ = tmp_gain * qcelp_rate_full_codebook[cbseed++ & 127];
- }
+ case I_F_Q:
+ cbseed = -44; // random codebook index
+ for (i = 0; i < 4; i++) {
+ tmp_gain = gain[i] * QCELP_RATE_FULL_CODEBOOK_RATIO;
+ for (j = 0; j < 40; j++)
+ *cdn_vector++ = tmp_gain * qcelp_rate_full_codebook[cbseed++ & 127];
+ }
break;
- case SILENCE:
- memset(cdn_vector, 0, 160 * sizeof(float));
+ case SILENCE:
+ memset(cdn_vector, 0, 160 * sizeof(float));
break;
}
}
*
* TIA/EIA/IS-733 2.4.8.3, 2.4.8.6
*/
-static void apply_gain_ctrl(float *v_out, const float *v_ref,
- const float *v_in)
+static void apply_gain_ctrl(float *v_out, const float *v_ref, const float *v_in)
{
int i;
- for (i = 0; i < 160; i += 40)
- ff_scale_vector_to_given_sum_of_squares(v_out + i, v_in + i,
- ff_dot_productf(v_ref + i,
- v_ref + i, 40),
- 40);
+ for (i = 0; i < 160; i += 40) {
+ float res = avpriv_scalarproduct_float_c(v_ref + i, v_ref + i, 40);
+ ff_scale_vector_to_given_sum_of_squares(v_out + i, v_in + i, res, 40);
+ }
}
/**
const float gain[4], const uint8_t *lag,
const uint8_t pfrac[4])
{
- int i, j;
- float *v_lag, *v_out;
+ int i, j;
+ float *v_lag, *v_out;
const float *v_len;
v_out = memory + 143; // Output vector starts at memory[143].
- for(i=0; i<4; i++)
- {
- if(gain[i])
- {
+ for (i = 0; i < 4; i++) {
+ if (gain[i]) {
v_lag = memory + 143 + 40 * i - lag[i];
- for(v_len=v_in+40; v_in<v_len; v_in++)
- {
- if(pfrac[i]) // If it is a fractional lag...
- {
- for(j=0, *v_out=0.; j<4; j++)
- *v_out += qcelp_hammsinc_table[j] * (v_lag[j-4] + v_lag[3-j]);
- }else
+ for (v_len = v_in + 40; v_in < v_len; v_in++) {
+ if (pfrac[i]) { // If it is a fractional lag...
+ for (j = 0, *v_out = 0.0; j < 4; j++)
+ *v_out += qcelp_hammsinc_table[j] * (v_lag[j - 4] + v_lag[3 - j]);
+ } else
*v_out = *v_lag;
*v_out = *v_in + gain[i] * *v_out;
v_lag++;
v_out++;
}
- }else
- {
+ } else {
memcpy(v_out, v_in, 40 * sizeof(float));
v_in += 40;
v_out += 40;
*/
static void apply_pitch_filters(QCELPContext *q, float *cdn_vector)
{
- int i;
+ int i;
const float *v_synthesis_filtered, *v_pre_filtered;
- if(q->bitrate >= RATE_HALF ||
- q->bitrate == SILENCE ||
- (q->bitrate == I_F_Q && (q->prev_bitrate >= RATE_HALF)))
- {
-
- if(q->bitrate >= RATE_HALF)
- {
+ if (q->bitrate >= RATE_HALF || q->bitrate == SILENCE ||
+ (q->bitrate == I_F_Q && (q->prev_bitrate >= RATE_HALF))) {
+ if (q->bitrate >= RATE_HALF) {
// Compute gain & lag for the whole frame.
- for(i=0; i<4; i++)
- {
+ for (i = 0; i < 4; i++) {
q->pitch_gain[i] = q->frame.plag[i] ? (q->frame.pgain[i] + 1) * 0.25 : 0.0;
q->pitch_lag[i] = q->frame.plag[i] + 16;
}
- }else
- {
+ } else {
float max_pitch_gain;
- if (q->bitrate == I_F_Q)
- {
+ if (q->bitrate == I_F_Q) {
if (q->erasure_count < 3)
max_pitch_gain = 0.9 - 0.3 * (q->erasure_count - 1);
else
max_pitch_gain = 0.0;
- }else
- {
+ } else {
assert(q->bitrate == SILENCE);
max_pitch_gain = 1.0;
}
- for(i=0; i<4; i++)
+ for (i = 0; i < 4; i++)
q->pitch_gain[i] = FFMIN(q->pitch_gain[i], max_pitch_gain);
memset(q->frame.pfrac, 0, sizeof(q->frame.pfrac));
q->pitch_lag, q->frame.pfrac);
// pitch prefilter update
- for(i=0; i<4; i++)
+ for (i = 0; i < 4; i++)
q->pitch_gain[i] = 0.5 * FFMIN(q->pitch_gain[i], 1.0);
- v_pre_filtered = do_pitchfilter(q->pitch_pre_filter_mem,
- v_synthesis_filtered,
- q->pitch_gain, q->pitch_lag,
- q->frame.pfrac);
+ v_pre_filtered = do_pitchfilter(q->pitch_pre_filter_mem,
+ v_synthesis_filtered,
+ q->pitch_gain, q->pitch_lag,
+ q->frame.pfrac);
apply_gain_ctrl(cdn_vector, v_synthesis_filtered, v_pre_filtered);
- }else
- {
- memcpy(q->pitch_synthesis_filter_mem, cdn_vector + 17,
- 143 * sizeof(float));
+ } else {
+ memcpy(q->pitch_synthesis_filter_mem, cdn_vector + 17, 143 * sizeof(float));
memcpy(q->pitch_pre_filter_mem, cdn_vector + 17, 143 * sizeof(float));
memset(q->pitch_gain, 0, sizeof(q->pitch_gain));
memset(q->pitch_lag, 0, sizeof(q->pitch_lag));
{
double lsp[10];
double bandwidth_expansion_coeff = QCELP_BANDWIDTH_EXPANSION_COEFF;
- int i;
+ int i;
- for (i=0; i<10; i++)
+ for (i = 0; i < 10; i++)
lsp[i] = cos(M_PI * lspf[i]);
ff_acelp_lspd2lpc(lsp, lpc, 5);
- for (i=0; i<10; i++)
- {
- lpc[i] *= bandwidth_expansion_coeff;
+ for (i = 0; i < 10; i++) {
+ lpc[i] *= bandwidth_expansion_coeff;
bandwidth_expansion_coeff *= QCELP_BANDWIDTH_EXPANSION_COEFF;
}
}
/**
- * Interpolate LSP frequencies and computes LPC coefficients
+ * Interpolate LSP frequencies and compute LPC coefficients
* for a given bitrate & pitch subframe.
*
* TIA/EIA/IS-733 2.4.3.3.4, 2.4.8.7.2
float interpolated_lspf[10];
float weight;
- if(q->bitrate >= RATE_QUARTER)
+ if (q->bitrate >= RATE_QUARTER)
weight = 0.25 * (subframe_num + 1);
- else if(q->bitrate == RATE_OCTAVE && !subframe_num)
+ else if (q->bitrate == RATE_OCTAVE && !subframe_num)
weight = 0.625;
else
weight = 1.0;
- if(weight != 1.0)
- {
+ if (weight != 1.0) {
ff_weighted_vector_sumf(interpolated_lspf, curr_lspf, q->prev_lspf,
weight, 1.0 - weight, 10);
lspf2lpc(interpolated_lspf, lpc);
- }else if(q->bitrate >= RATE_QUARTER ||
- (q->bitrate == I_F_Q && !subframe_num))
+ } else if (q->bitrate >= RATE_QUARTER ||
+ (q->bitrate == I_F_Q && !subframe_num))
lspf2lpc(curr_lspf, lpc);
- else if(q->bitrate == SILENCE && !subframe_num)
+ else if (q->bitrate == SILENCE && !subframe_num)
lspf2lpc(q->prev_lspf, lpc);
}
static qcelp_packet_rate buf_size2bitrate(const int buf_size)
{
- switch(buf_size)
- {
- case 35: return RATE_FULL;
- case 17: return RATE_HALF;
- case 8: return RATE_QUARTER;
- case 4: return RATE_OCTAVE;
- case 1: return SILENCE;
+ switch (buf_size) {
+ case 35: return RATE_FULL;
+ case 17: return RATE_HALF;
+ case 8: return RATE_QUARTER;
+ case 4: return RATE_OCTAVE;
+ case 1: return SILENCE;
}
return I_F_Q;
*
* TIA/EIA/IS-733 2.4.8.7.1
*/
-static qcelp_packet_rate determine_bitrate(AVCodecContext *avctx, const int buf_size,
- const uint8_t **buf)
+static qcelp_packet_rate determine_bitrate(AVCodecContext *avctx,
+ const int buf_size,
+ const uint8_t **buf)
{
qcelp_packet_rate bitrate;
- if((bitrate = buf_size2bitrate(buf_size)) >= 0)
- {
- if(bitrate > **buf)
- {
+ if ((bitrate = buf_size2bitrate(buf_size)) >= 0) {
+ if (bitrate > **buf) {
QCELPContext *q = avctx->priv_data;
- if (!q->warned_buf_mismatch_bitrate)
- {
+ if (!q->warned_buf_mismatch_bitrate) {
av_log(avctx, AV_LOG_WARNING,
"Claimed bitrate and buffer size mismatch.\n");
q->warned_buf_mismatch_bitrate = 1;
}
bitrate = **buf;
- }else if(bitrate < **buf)
- {
+ } else if (bitrate < **buf) {
av_log(avctx, AV_LOG_ERROR,
"Buffer is too small for the claimed bitrate.\n");
return I_F_Q;
}
(*buf)++;
- }else if((bitrate = buf_size2bitrate(buf_size + 1)) >= 0)
- {
+ } else if ((bitrate = buf_size2bitrate(buf_size + 1)) >= 0) {
av_log(avctx, AV_LOG_WARNING,
"Bitrate byte is missing, guessing the bitrate from packet size.\n");
- }else
+ } else
return I_F_Q;
- if(bitrate == SILENCE)
- {
- //FIXME: Remove experimental warning when tested with samples.
- av_log_ask_for_sample(avctx, "'Blank frame handling is experimental.");
+ if (bitrate == SILENCE) {
+ // FIXME: Remove this warning when tested with samples.
+ avpriv_request_sample(avctx, "Blank frame handling");
}
return bitrate;
}
static void warn_insufficient_frame_quality(AVCodecContext *avctx,
const char *message)
{
- av_log(avctx, AV_LOG_WARNING, "Frame #%d, IFQ: %s\n", avctx->frame_number,
- message);
+ av_log(avctx, AV_LOG_WARNING, "Frame #%d, IFQ: %s\n",
+ avctx->frame_number, message);
}
static void postfilter(QCELPContext *q, float *samples, float *lpc)
ff_celp_lp_zero_synthesis_filterf(zero_out, lpc_s,
q->formant_mem + 10, 160, 10);
- memcpy(pole_out, q->postfilter_synth_mem, sizeof(float) * 10);
+ memcpy(pole_out, q->postfilter_synth_mem, sizeof(float) * 10);
ff_celp_lp_synthesis_filterf(pole_out + 10, lpc_p, zero_out, 160, 10);
memcpy(q->postfilter_synth_mem, pole_out + 160, sizeof(float) * 10);
ff_tilt_compensation(&q->postfilter_tilt_mem, 0.3, pole_out + 10, 160);
ff_adaptive_gain_control(samples, pole_out + 10,
- ff_dot_productf(q->formant_mem + 10, q->formant_mem + 10, 160),
- 160, 0.9375, &q->postfilter_agc_mem);
+ avpriv_scalarproduct_float_c(q->formant_mem + 10,
+ q->formant_mem + 10,
+ 160),
+ 160, 0.9375, &q->postfilter_agc_mem);
}
-static int qcelp_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
- AVPacket *avpkt)
+static int qcelp_decode_frame(AVCodecContext *avctx, void *data,
+ int *got_frame_ptr, AVPacket *avpkt)
{
const uint8_t *buf = avpkt->data;
- int buf_size = avpkt->size;
- QCELPContext *q = avctx->priv_data;
- float *outbuffer = data;
- int i;
+ int buf_size = avpkt->size;
+ QCELPContext *q = avctx->priv_data;
+ AVFrame *frame = data;
+ float *outbuffer;
+ int i, ret;
float quantized_lspf[10], lpc[10];
float gain[16];
float *formant_mem;
- if((q->bitrate = determine_bitrate(avctx, buf_size, &buf)) == I_F_Q)
- {
+ /* get output buffer */
+ frame->nb_samples = 160;
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
+ outbuffer = (float *)frame->data[0];
+
+ if ((q->bitrate = determine_bitrate(avctx, buf_size, &buf)) == I_F_Q) {
warn_insufficient_frame_quality(avctx, "bitrate cannot be determined.");
goto erasure;
}
- if(q->bitrate == RATE_OCTAVE &&
- (q->first16bits = AV_RB16(buf)) == 0xFFFF)
- {
+ if (q->bitrate == RATE_OCTAVE &&
+ (q->first16bits = AV_RB16(buf)) == 0xFFFF) {
warn_insufficient_frame_quality(avctx, "Bitrate is 1/8 and first 16 bits are on.");
goto erasure;
}
- if(q->bitrate > SILENCE)
- {
+ if (q->bitrate > SILENCE) {
const QCELPBitmap *bitmaps = qcelp_unpacking_bitmaps_per_rate[q->bitrate];
- const QCELPBitmap *bitmaps_end = qcelp_unpacking_bitmaps_per_rate[q->bitrate]
- + qcelp_unpacking_bitmaps_lengths[q->bitrate];
- uint8_t *unpacked_data = (uint8_t *)&q->frame;
+ const QCELPBitmap *bitmaps_end = qcelp_unpacking_bitmaps_per_rate[q->bitrate] +
+ qcelp_unpacking_bitmaps_lengths[q->bitrate];
+ uint8_t *unpacked_data = (uint8_t *)&q->frame;
- init_get_bits(&q->gb, buf, 8*buf_size);
+ init_get_bits(&q->gb, buf, 8 * buf_size);
memset(&q->frame, 0, sizeof(QCELPFrame));
- for(; bitmaps < bitmaps_end; bitmaps++)
+ for (; bitmaps < bitmaps_end; bitmaps++)
unpacked_data[bitmaps->index] |= get_bits(&q->gb, bitmaps->bitlen) << bitmaps->bitpos;
// Check for erasures/blanks on rates 1, 1/4 and 1/8.
- if(q->frame.reserved)
- {
+ if (q->frame.reserved) {
warn_insufficient_frame_quality(avctx, "Wrong data in reserved frame area.");
goto erasure;
}
- if(q->bitrate == RATE_QUARTER &&
- codebook_sanity_check_for_rate_quarter(q->frame.cbgain))
- {
+ if (q->bitrate == RATE_QUARTER &&
+ codebook_sanity_check_for_rate_quarter(q->frame.cbgain)) {
warn_insufficient_frame_quality(avctx, "Codebook gain sanity check failed.");
goto erasure;
}
- if(q->bitrate >= RATE_HALF)
- {
- for(i=0; i<4; i++)
- {
- if(q->frame.pfrac[i] && q->frame.plag[i] >= 124)
- {
+ if (q->bitrate >= RATE_HALF) {
+ for (i = 0; i < 4; i++) {
+ if (q->frame.pfrac[i] && q->frame.plag[i] >= 124) {
warn_insufficient_frame_quality(avctx, "Cannot initialize pitch filter.");
goto erasure;
}
decode_gain_and_index(q, gain);
compute_svector(q, gain, outbuffer);
- if(decode_lspf(q, quantized_lspf) < 0)
- {
+ if (decode_lspf(q, quantized_lspf) < 0) {
warn_insufficient_frame_quality(avctx, "Badly received packets in frame.");
goto erasure;
}
-
apply_pitch_filters(q, outbuffer);
- if(q->bitrate == I_F_Q)
- {
+ if (q->bitrate == I_F_Q) {
erasure:
q->bitrate = I_F_Q;
q->erasure_count++;
compute_svector(q, gain, outbuffer);
decode_lspf(q, quantized_lspf);
apply_pitch_filters(q, outbuffer);
- }else
+ } else
q->erasure_count = 0;
formant_mem = q->formant_mem + 10;
- for(i=0; i<4; i++)
- {
+ for (i = 0; i < 4; i++) {
interpolate_lpc(q, quantized_lspf, lpc, i);
- ff_celp_lp_synthesis_filterf(formant_mem, lpc, outbuffer + i * 40, 40,
- 10);
+ ff_celp_lp_synthesis_filterf(formant_mem, lpc, outbuffer + i * 40, 40, 10);
formant_mem += 40;
}
memcpy(q->formant_mem, q->formant_mem + 160, 10 * sizeof(float));
memcpy(q->prev_lspf, quantized_lspf, sizeof(q->prev_lspf));
- q->prev_bitrate = q->bitrate;
+ q->prev_bitrate = q->bitrate;
- *data_size = 160 * sizeof(*outbuffer);
+ *got_frame_ptr = 1;
- return *data_size;
+ return buf_size;
}
-AVCodec qcelp_decoder =
-{
- .name = "qcelp",
- .type = AVMEDIA_TYPE_AUDIO,
- .id = CODEC_ID_QCELP,
- .init = qcelp_decode_init,
- .decode = qcelp_decode_frame,
+AVCodec ff_qcelp_decoder = {
+ .name = "qcelp",
+ .long_name = NULL_IF_CONFIG_SMALL("QCELP / PureVoice"),
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_QCELP,
+ .init = qcelp_decode_init,
+ .decode = qcelp_decode_frame,
+ .capabilities = CODEC_CAP_DR1,
.priv_data_size = sizeof(QCELPContext),
- .long_name = NULL_IF_CONFIG_SMALL("QCELP / PureVoice"),
};
projects / ffmpeg / blobdiff