mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-07 18:14:16 +02:00
Trivial, Cosmetics
Originally committed as revision 15904 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reynaldo H. Verdejo Pinochet
parent
e178d7fd0f
commit
1b321c5c96
@ -56,7 +56,8 @@ static void weighted_vector_sumf(float *out, const float *in_a,
|
|||||||
*
|
*
|
||||||
* TIA/EIA/IS-733 2.4.9
|
* TIA/EIA/IS-733 2.4.9
|
||||||
*/
|
*/
|
||||||
static av_cold int qcelp_decode_init(AVCodecContext *avctx) {
|
static av_cold int qcelp_decode_init(AVCodecContext *avctx)
|
||||||
|
{
|
||||||
QCELPContext *q = avctx->priv_data;
|
QCELPContext *q = avctx->priv_data;
|
||||||
int i;
|
int i;
|
||||||
|
|
||||||
@ -79,22 +80,24 @@ static av_cold int qcelp_decode_init(AVCodecContext *avctx) {
|
|||||||
*
|
*
|
||||||
* TIA/EIA/IS-733 2.4.3.2.6.2-2, 2.4.8.7.3
|
* TIA/EIA/IS-733 2.4.3.2.6.2-2, 2.4.8.7.3
|
||||||
*/
|
*/
|
||||||
static int decode_lspf(QCELPContext *q,
|
static int decode_lspf(QCELPContext *q, float *lspf)
|
||||||
float *lspf) {
|
{
|
||||||
int i;
|
int i;
|
||||||
float tmp_lspf;
|
float tmp_lspf;
|
||||||
|
|
||||||
if (q->bitrate == RATE_OCTAVE ||
|
if(q->bitrate == RATE_OCTAVE || q->bitrate == I_F_Q)
|
||||||
q->bitrate == I_F_Q) {
|
{
|
||||||
float smooth;
|
float smooth;
|
||||||
const float *predictors = (q->prev_bitrate != RATE_OCTAVE &&
|
const float *predictors = (q->prev_bitrate != RATE_OCTAVE &&
|
||||||
q->prev_bitrate != I_F_Q ? q->prev_lspf
|
q->prev_bitrate != I_F_Q ? q->prev_lspf
|
||||||
: q->predictor_lspf);
|
: q->predictor_lspf);
|
||||||
|
|
||||||
if (q->bitrate == RATE_OCTAVE) {
|
if(q->bitrate == RATE_OCTAVE)
|
||||||
|
{
|
||||||
q->octave_count++;
|
q->octave_count++;
|
||||||
|
|
||||||
for (i = 0; i < 10; i++) {
|
for(i=0; i<10; i++)
|
||||||
|
{
|
||||||
q->predictor_lspf[i] =
|
q->predictor_lspf[i] =
|
||||||
lspf[i] = (q->lspv[i] ? QCELP_LSP_SPREAD_FACTOR
|
lspf[i] = (q->lspv[i] ? QCELP_LSP_SPREAD_FACTOR
|
||||||
: -QCELP_LSP_SPREAD_FACTOR)
|
: -QCELP_LSP_SPREAD_FACTOR)
|
||||||
@ -102,15 +105,17 @@ static int decode_lspf(QCELPContext *q,
|
|||||||
+ (i + 1) * ((1 - QCELP_LSP_OCTAVE_PREDICTOR)/11);
|
+ (i + 1) * ((1 - QCELP_LSP_OCTAVE_PREDICTOR)/11);
|
||||||
}
|
}
|
||||||
smooth = (q->octave_count < 10 ? .875 : 0.1);
|
smooth = (q->octave_count < 10 ? .875 : 0.1);
|
||||||
} else {
|
}else
|
||||||
|
{
|
||||||
float erasure_coeff = QCELP_LSP_OCTAVE_PREDICTOR;
|
float erasure_coeff = QCELP_LSP_OCTAVE_PREDICTOR;
|
||||||
|
|
||||||
assert(q->bitrate == I_F_Q);
|
assert(q->bitrate == I_F_Q);
|
||||||
|
|
||||||
if (q->erasure_count > 1)
|
if(q->erasure_count > 1)
|
||||||
erasure_coeff *= (q->erasure_count < 4 ? 0.9 : 0.7);
|
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] =
|
q->predictor_lspf[i] =
|
||||||
lspf[i] = (i + 1) * ( 1 - erasure_coeff)/11
|
lspf[i] = (i + 1) * ( 1 - erasure_coeff)/11
|
||||||
+ erasure_coeff * predictors[i];
|
+ erasure_coeff * predictors[i];
|
||||||
@ -120,35 +125,39 @@ static int decode_lspf(QCELPContext *q,
|
|||||||
|
|
||||||
// Check the stability of the LSP frequencies.
|
// Check the stability of the LSP frequencies.
|
||||||
lspf[0] = FFMAX(lspf[0], QCELP_LSP_SPREAD_FACTOR);
|
lspf[0] = FFMAX(lspf[0], QCELP_LSP_SPREAD_FACTOR);
|
||||||
for (i = 1; i < 10; i++)
|
for(i=1; i<10; i++)
|
||||||
lspf[i] = FFMAX(lspf[i], (lspf[i-1] + QCELP_LSP_SPREAD_FACTOR));
|
lspf[i] = FFMAX(lspf[i], (lspf[i-1] + QCELP_LSP_SPREAD_FACTOR));
|
||||||
|
|
||||||
lspf[9] = FFMIN(lspf[9], (1.0 - QCELP_LSP_SPREAD_FACTOR));
|
lspf[9] = FFMIN(lspf[9], (1.0 - QCELP_LSP_SPREAD_FACTOR));
|
||||||
for (i = 9; i > 0; i--)
|
for(i=9; i>0; i--)
|
||||||
lspf[i-1] = FFMIN(lspf[i-1], (lspf[i] - QCELP_LSP_SPREAD_FACTOR));
|
lspf[i-1] = FFMIN(lspf[i-1], (lspf[i] - QCELP_LSP_SPREAD_FACTOR));
|
||||||
|
|
||||||
// Low-pass filter the LSP frequencies.
|
// Low-pass filter the LSP frequencies.
|
||||||
weighted_vector_sumf(lspf, lspf, q->prev_lspf, smooth, 1.0 - smooth, 10);
|
weighted_vector_sumf(lspf, lspf, q->prev_lspf, smooth, 1.0-smooth, 10);
|
||||||
} else {
|
}else
|
||||||
|
{
|
||||||
q->octave_count = 0;
|
q->octave_count = 0;
|
||||||
|
|
||||||
tmp_lspf = 0.;
|
tmp_lspf = 0.;
|
||||||
for (i = 0; i < 5 ; i++) {
|
for(i=0; i<5 ; i++)
|
||||||
|
{
|
||||||
lspf[2*i+0] = tmp_lspf += qcelp_lspvq[i][q->lspv[i]][0] * 0.0001;
|
lspf[2*i+0] = tmp_lspf += qcelp_lspvq[i][q->lspv[i]][0] * 0.0001;
|
||||||
lspf[2*i+1] = tmp_lspf += qcelp_lspvq[i][q->lspv[i]][1] * 0.0001;
|
lspf[2*i+1] = tmp_lspf += qcelp_lspvq[i][q->lspv[i]][1] * 0.0001;
|
||||||
}
|
}
|
||||||
|
|
||||||
// Check for badly received packets.
|
// Check for badly received packets.
|
||||||
if (q->bitrate == RATE_QUARTER) {
|
if(q->bitrate == RATE_QUARTER)
|
||||||
if (lspf[9] <= .70 || lspf[9] >= .97)
|
{
|
||||||
|
if(lspf[9] <= .70 || lspf[9] >= .97)
|
||||||
return -1;
|
return -1;
|
||||||
for (i = 3; i < 10; i++)
|
for(i=3; i<10; i++)
|
||||||
if (fabs(lspf[i] - lspf[i-2]) < .08)
|
if(fabs(lspf[i] - lspf[i-2]) < .08)
|
||||||
return -1;
|
return -1;
|
||||||
} else {
|
}else
|
||||||
if (lspf[9] <= .66 || lspf[9] >= .985)
|
{
|
||||||
|
if(lspf[9] <= .66 || lspf[9] >= .985)
|
||||||
return -1;
|
return -1;
|
||||||
for (i = 4; i < 10; i++)
|
for(i=4; i<10; i++)
|
||||||
if (fabs(lspf[i] - lspf[i-4]) < .0931)
|
if (fabs(lspf[i] - lspf[i-4]) < .0931)
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
@ -157,23 +166,26 @@ static int decode_lspf(QCELPContext *q,
|
|||||||
}
|
}
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* If the received packet is Rate 1/4 a further sanity check is made of the codebook gain.
|
* If the received packet is Rate 1/4 a further sanity check is made of the
|
||||||
|
* codebook gain.
|
||||||
*
|
*
|
||||||
* @param cbgain the unpacked cbgain array
|
* @param cbgain the unpacked cbgain array
|
||||||
* @return -1 if the sanity check fails, 0 otherwise
|
* @return -1 if the sanity check fails, 0 otherwise
|
||||||
*
|
*
|
||||||
* TIA/EIA/IS-733 2.4.8.7.3
|
* TIA/EIA/IS-733 2.4.8.7.3
|
||||||
*/
|
*/
|
||||||
static int codebook_sanity_check_for_rate_quarter(const uint8_t *cbgain) {
|
static int codebook_sanity_check_for_rate_quarter(const uint8_t *cbgain)
|
||||||
|
{
|
||||||
int i, prev_diff=0;
|
int i, prev_diff=0;
|
||||||
|
|
||||||
for (i = 1; i < 5; i++) {
|
for(i=1; i<5; i++)
|
||||||
int diff = cbgain[i] - cbgain[i-1];
|
{
|
||||||
if (FFABS(diff) > 10)
|
int diff = cbgain[i] - cbgain[i-1];
|
||||||
return -1;
|
if(FFABS(diff) > 10)
|
||||||
else if (FFABS(diff - prev_diff) > 12)
|
return -1;
|
||||||
return -1;
|
else if(FFABS(diff - prev_diff) > 12)
|
||||||
prev_diff = diff;
|
return -1;
|
||||||
|
prev_diff = diff;
|
||||||
}
|
}
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
@ -199,72 +211,81 @@ static int codebook_sanity_check_for_rate_quarter(const uint8_t *cbgain) {
|
|||||||
* @param gain array holding the 4 pitch subframe gain values
|
* @param gain array holding the 4 pitch subframe gain values
|
||||||
* @param cdn_vector array for the generated scaled codebook vector
|
* @param cdn_vector array for the generated scaled codebook vector
|
||||||
*/
|
*/
|
||||||
static void compute_svector(const QCELPContext *q,
|
static void compute_svector(const QCELPContext *q, const float *gain,
|
||||||
const float *gain,
|
float *cdn_vector)
|
||||||
float *cdn_vector) {
|
{
|
||||||
int i, j, k;
|
int i, j, k;
|
||||||
uint16_t cbseed, cindex;
|
uint16_t cbseed, cindex;
|
||||||
float *rnd, tmp_gain, fir_filter_value;
|
float *rnd, tmp_gain, fir_filter_value;
|
||||||
|
|
||||||
switch (q->bitrate) {
|
switch(q->bitrate)
|
||||||
case RATE_FULL:
|
{
|
||||||
for (i = 0; i < 16; i++) {
|
case RATE_FULL:
|
||||||
tmp_gain = gain[i] * QCELP_RATE_FULL_CODEBOOK_RATIO;
|
for(i=0; i<16; i++)
|
||||||
cindex = -q->cindex[i];
|
{
|
||||||
for (j = 0; j < 10; j++)
|
tmp_gain = gain[i] * QCELP_RATE_FULL_CODEBOOK_RATIO;
|
||||||
*cdn_vector++ = tmp_gain * qcelp_rate_full_codebook[cindex++ & 127];
|
cindex = -q->cindex[i];
|
||||||
}
|
for(j=0; j<10; j++)
|
||||||
|
*cdn_vector++ = tmp_gain * qcelp_rate_full_codebook[cindex++ & 127];
|
||||||
|
}
|
||||||
break;
|
break;
|
||||||
case RATE_HALF:
|
case RATE_HALF:
|
||||||
for (i = 0; i < 4; i++) {
|
for(i=0; i<4; i++)
|
||||||
tmp_gain = gain[i] * QCELP_RATE_HALF_CODEBOOK_RATIO;
|
{
|
||||||
cindex = -q->cindex[i];
|
tmp_gain = gain[i] * QCELP_RATE_HALF_CODEBOOK_RATIO;
|
||||||
for (j = 0; j < 40; j++)
|
cindex = -q->cindex[i];
|
||||||
|
for (j = 0; j < 40; j++)
|
||||||
*cdn_vector++ = tmp_gain * qcelp_rate_half_codebook[cindex++ & 127];
|
*cdn_vector++ = tmp_gain * qcelp_rate_half_codebook[cindex++ & 127];
|
||||||
}
|
|
||||||
break;
|
|
||||||
case RATE_QUARTER:
|
|
||||||
cbseed = (0x0003 & q->lspv[4])<<14 |
|
|
||||||
(0x003F & q->lspv[3])<< 8 |
|
|
||||||
(0x0060 & q->lspv[2])<< 1 |
|
|
||||||
(0x0007 & q->lspv[1])<< 3 |
|
|
||||||
(0x0038 & q->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++;
|
|
||||||
}
|
}
|
||||||
}
|
|
||||||
memcpy(q->rnd_fir_filter_mem, q->rnd_fir_filter_mem + 160, 20 * sizeof(float));
|
|
||||||
break;
|
break;
|
||||||
case RATE_OCTAVE:
|
case RATE_QUARTER:
|
||||||
cbseed = q->first16bits;
|
cbseed = (0x0003 & q->lspv[4])<<14 |
|
||||||
for (i = 0; i < 8; i++) {
|
(0x003F & q->lspv[3])<< 8 |
|
||||||
tmp_gain = gain[i] * (QCELP_SQRT1887 / 32768.0);
|
(0x0060 & q->lspv[2])<< 1 |
|
||||||
for (j = 0; j < 20; j++) {
|
(0x0007 & q->lspv[1])<< 3 |
|
||||||
cbseed = 521 * cbseed + 259;
|
(0x0038 & q->lspv[0])>> 3 ;
|
||||||
*cdn_vector++ = tmp_gain * (int16_t)cbseed;
|
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++;
|
||||||
|
}
|
||||||
}
|
}
|
||||||
}
|
memcpy(q->rnd_fir_filter_mem, q->rnd_fir_filter_mem + 160, 20 * sizeof(float));
|
||||||
break;
|
break;
|
||||||
case I_F_Q:
|
case RATE_OCTAVE:
|
||||||
cbseed = -44; // random codebook index
|
cbseed = q->first16bits;
|
||||||
for (i = 0; i < 4; i++) {
|
for(i=0; i<8; i++)
|
||||||
tmp_gain = gain[i] * QCELP_RATE_FULL_CODEBOOK_RATIO;
|
{
|
||||||
for (j = 0; j < 40; j++)
|
tmp_gain = gain[i] * (QCELP_SQRT1887 / 32768.0);
|
||||||
*cdn_vector++ = tmp_gain * qcelp_rate_full_codebook[cbseed++ & 127];
|
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];
|
||||||
|
}
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
@ -282,19 +303,21 @@ static void compute_svector(const QCELPContext *q,
|
|||||||
*
|
*
|
||||||
* TIA/EIA/IS-733 2.4.8.3-2/3/4/5, 2.4.8.6
|
* TIA/EIA/IS-733 2.4.8.3-2/3/4/5, 2.4.8.6
|
||||||
*/
|
*/
|
||||||
static void apply_gain_ctrl(float *v_out,
|
static void apply_gain_ctrl(float *v_out, const float *v_ref,
|
||||||
const float *v_ref,
|
const float *v_in)
|
||||||
const float *v_in) {
|
{
|
||||||
int i, j, len;
|
int i, j, len;
|
||||||
float scalefactor;
|
float scalefactor;
|
||||||
|
|
||||||
for (i = 0, j = 0; i < 4; i++) {
|
for(i=0, j=0; i<4; i++)
|
||||||
|
{
|
||||||
scalefactor = ff_dot_productf(v_in + j, v_in + j, 40);
|
scalefactor = ff_dot_productf(v_in + j, v_in + j, 40);
|
||||||
if (scalefactor)
|
if(scalefactor)
|
||||||
scalefactor = sqrt(ff_dot_productf(v_ref + j, v_ref + j, 40) / scalefactor);
|
scalefactor = sqrt(ff_dot_productf(v_ref + j, v_ref + j, 40)
|
||||||
|
/ scalefactor);
|
||||||
else
|
else
|
||||||
av_log_missing_feature(NULL, "Zero energy for gain control", 1);
|
av_log_missing_feature(NULL, "Zero energy for gain control", 1);
|
||||||
for (len = j + 40; j < len; j++)
|
for(len=j+40; j<len; j++)
|
||||||
v_out[j] = scalefactor * v_in[j];
|
v_out[j] = scalefactor * v_in[j];
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
@ -311,7 +334,8 @@ static void apply_gain_ctrl(float *v_out,
|
|||||||
* @param lag per-subframe lag array, each element is
|
* @param lag per-subframe lag array, each element is
|
||||||
* - between 16 and 143 if its corresponding pfrac is 0,
|
* - between 16 and 143 if its corresponding pfrac is 0,
|
||||||
* - between 16 and 139 otherwise
|
* - between 16 and 139 otherwise
|
||||||
* @param pfrac per-subframe boolean array, 1 if the lag is fractional, 0 otherwise
|
* @param pfrac per-subframe boolean array, 1 if the lag is fractional, 0
|
||||||
|
* otherwise
|
||||||
*
|
*
|
||||||
* @return filter output vector
|
* @return filter output vector
|
||||||
*/
|
*/
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user