[FFmpeg-cvslog] r15904 - trunk/libavcodec/qcelpdec.c
reynaldo
subversion
Sat Nov 22 01:27:26 CET 2008
Author: reynaldo
Date: Sat Nov 22 01:27:26 2008
New Revision: 15904
Log:
Trivial, Cosmetics
Modified:
trunk/libavcodec/qcelpdec.c
Modified: trunk/libavcodec/qcelpdec.c
==============================================================================
--- trunk/libavcodec/qcelpdec.c (original)
+++ trunk/libavcodec/qcelpdec.c Sat Nov 22 01:27:26 2008
@@ -56,7 +56,8 @@ static void weighted_vector_sumf(float *
*
* 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;
int i;
@@ -79,22 +80,24 @@ static av_cold int qcelp_decode_init(AVC
*
* TIA/EIA/IS-733 2.4.3.2.6.2-2, 2.4.8.7.3
*/
-static int decode_lspf(QCELPContext *q,
- float *lspf) {
+static int decode_lspf(QCELPContext *q, float *lspf)
+{
int i;
float tmp_lspf;
- if (q->bitrate == RATE_OCTAVE ||
- q->bitrate == I_F_Q) {
+ if(q->bitrate == RATE_OCTAVE || q->bitrate == I_F_Q)
+ {
float smooth;
const float *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->lspv[i] ? 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);
}
smooth = (q->octave_count < 10 ? .875 : 0.1);
- } else {
+ }else
+ {
float erasure_coeff = QCELP_LSP_OCTAVE_PREDICTOR;
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);
- 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];
@@ -120,35 +125,39 @@ static int decode_lspf(QCELPContext *q,
// Check the stability of the LSP frequencies.
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[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));
// Low-pass filter the LSP frequencies.
- weighted_vector_sumf(lspf, lspf, q->prev_lspf, smooth, 1.0 - smooth, 10);
- } else {
+ 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++) {
+ for(i=0; i<5 ; i++)
+ {
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;
}
// 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++)
+ for(i=4; i<10; i++)
if (fabs(lspf[i] - lspf[i-4]) < .0931)
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
* @return -1 if the sanity check fails, 0 otherwise
*
* 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;
- for (i = 1; i < 5; i++) {
- int diff = cbgain[i] - cbgain[i-1];
- if (FFABS(diff) > 10)
- return -1;
- else if (FFABS(diff - prev_diff) > 12)
- return -1;
- prev_diff = diff;
+ for(i=1; i<5; i++)
+ {
+ int diff = cbgain[i] - cbgain[i-1];
+ if(FFABS(diff) > 10)
+ return -1;
+ else if(FFABS(diff - prev_diff) > 12)
+ return -1;
+ prev_diff = diff;
}
return 0;
}
@@ -199,72 +211,81 @@ static int codebook_sanity_check_for_rat
* @param gain array holding the 4 pitch subframe gain values
* @param cdn_vector array for the generated scaled codebook vector
*/
-static void compute_svector(const QCELPContext *q,
- const float *gain,
- float *cdn_vector) {
+static void compute_svector(const QCELPContext *q, const float *gain,
+ float *cdn_vector)
+{
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->cindex[i];
- for (j = 0; j < 10; j++)
- *cdn_vector++ = tmp_gain * qcelp_rate_full_codebook[cindex++ & 127];
- }
+ switch(q->bitrate)
+ {
+ case RATE_FULL:
+ for(i=0; i<16; i++)
+ {
+ tmp_gain = gain[i] * QCELP_RATE_FULL_CODEBOOK_RATIO;
+ cindex = -q->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->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->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->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;
+ 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];
+ // 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]);
- *cdn_vector++ = tmp_gain * fir_filter_value;
- rnd++;
+ 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;
}
}
@@ -282,19 +303,21 @@ static void compute_svector(const QCELPC
*
* TIA/EIA/IS-733 2.4.8.3-2/3/4/5, 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, j, len;
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);
- if (scalefactor)
- scalefactor = sqrt(ff_dot_productf(v_ref + j, v_ref + j, 40) / scalefactor);
+ if(scalefactor)
+ scalefactor = sqrt(ff_dot_productf(v_ref + j, v_ref + j, 40)
+ / scalefactor);
else
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];
}
}
@@ -311,7 +334,8 @@ static void apply_gain_ctrl(float *v_out
* @param lag per-subframe lag array, each element is
* - between 16 and 143 if its corresponding pfrac is 0,
* - 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
*/
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