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Diffstat (limited to 'media/libopus/silk/quant_LTP_gains.c')
-rw-r--r--media/libopus/silk/quant_LTP_gains.c67
1 files changed, 35 insertions, 32 deletions
diff --git a/media/libopus/silk/quant_LTP_gains.c b/media/libopus/silk/quant_LTP_gains.c
index 513a8c4468..d6b8eff8d1 100644
--- a/media/libopus/silk/quant_LTP_gains.c
+++ b/media/libopus/silk/quant_LTP_gains.c
@@ -33,14 +33,15 @@ POSSIBILITY OF SUCH DAMAGE.
#include "tuning_parameters.h"
void silk_quant_LTP_gains(
- opus_int16 B_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* I/O (un)quantized LTP gains */
+ opus_int16 B_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* O Quantized LTP gains */
opus_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook Index */
opus_int8 *periodicity_index, /* O Periodicity Index */
opus_int32 *sum_log_gain_Q7, /* I/O Cumulative max prediction gain */
- const opus_int32 W_Q18[ MAX_NB_SUBFR*LTP_ORDER*LTP_ORDER ], /* I Error Weights in Q18 */
- opus_int mu_Q9, /* I Mu value (R/D tradeoff) */
- opus_int lowComplexity, /* I Flag for low complexity */
- const opus_int nb_subfr, /* I number of subframes */
+ opus_int *pred_gain_dB_Q7, /* O LTP prediction gain */
+ const opus_int32 XX_Q17[ MAX_NB_SUBFR*LTP_ORDER*LTP_ORDER ], /* I Correlation matrix in Q18 */
+ const opus_int32 xX_Q17[ MAX_NB_SUBFR*LTP_ORDER ], /* I Correlation vector in Q18 */
+ const opus_int subfr_len, /* I Number of samples per subframe */
+ const opus_int nb_subfr, /* I Number of subframes */
int arch /* I Run-time architecture */
)
{
@@ -49,16 +50,16 @@ void silk_quant_LTP_gains(
const opus_uint8 *cl_ptr_Q5;
const opus_int8 *cbk_ptr_Q7;
const opus_uint8 *cbk_gain_ptr_Q7;
- const opus_int16 *b_Q14_ptr;
- const opus_int32 *W_Q18_ptr;
- opus_int32 rate_dist_Q14_subfr, rate_dist_Q14, min_rate_dist_Q14;
- opus_int32 sum_log_gain_tmp_Q7, best_sum_log_gain_Q7, max_gain_Q7, gain_Q7;
+ const opus_int32 *XX_Q17_ptr, *xX_Q17_ptr;
+ opus_int32 res_nrg_Q15_subfr, res_nrg_Q15, rate_dist_Q7_subfr, rate_dist_Q7, min_rate_dist_Q7;
+ opus_int32 sum_log_gain_tmp_Q7, best_sum_log_gain_Q7, max_gain_Q7;
+ opus_int gain_Q7;
/***************************************************/
/* iterate over different codebooks with different */
/* rates/distortions, and choose best */
/***************************************************/
- min_rate_dist_Q14 = silk_int32_MAX;
+ min_rate_dist_Q7 = silk_int32_MAX;
best_sum_log_gain_Q7 = 0;
for( k = 0; k < 3; k++ ) {
/* Safety margin for pitch gain control, to take into account factors
@@ -70,53 +71,47 @@ void silk_quant_LTP_gains(
cbk_gain_ptr_Q7 = silk_LTP_vq_gain_ptrs_Q7[ k ];
cbk_size = silk_LTP_vq_sizes[ k ];
- /* Set up pointer to first subframe */
- W_Q18_ptr = W_Q18;
- b_Q14_ptr = B_Q14;
+ /* Set up pointers to first subframe */
+ XX_Q17_ptr = XX_Q17;
+ xX_Q17_ptr = xX_Q17;
- rate_dist_Q14 = 0;
+ res_nrg_Q15 = 0;
+ rate_dist_Q7 = 0;
sum_log_gain_tmp_Q7 = *sum_log_gain_Q7;
for( j = 0; j < nb_subfr; j++ ) {
max_gain_Q7 = silk_log2lin( ( SILK_FIX_CONST( MAX_SUM_LOG_GAIN_DB / 6.0, 7 ) - sum_log_gain_tmp_Q7 )
+ SILK_FIX_CONST( 7, 7 ) ) - gain_safety;
-
silk_VQ_WMat_EC(
&temp_idx[ j ], /* O index of best codebook vector */
- &rate_dist_Q14_subfr, /* O best weighted quantization error + mu * rate */
+ &res_nrg_Q15_subfr, /* O residual energy */
+ &rate_dist_Q7_subfr, /* O best weighted quantization error + mu * rate */
&gain_Q7, /* O sum of absolute LTP coefficients */
- b_Q14_ptr, /* I input vector to be quantized */
- W_Q18_ptr, /* I weighting matrix */
+ XX_Q17_ptr, /* I correlation matrix */
+ xX_Q17_ptr, /* I correlation vector */
cbk_ptr_Q7, /* I codebook */
cbk_gain_ptr_Q7, /* I codebook effective gains */
cl_ptr_Q5, /* I code length for each codebook vector */
- mu_Q9, /* I tradeoff between weighted error and rate */
+ subfr_len, /* I number of samples per subframe */
max_gain_Q7, /* I maximum sum of absolute LTP coefficients */
cbk_size, /* I number of vectors in codebook */
arch /* I Run-time architecture */
);
- rate_dist_Q14 = silk_ADD_POS_SAT32( rate_dist_Q14, rate_dist_Q14_subfr );
+ res_nrg_Q15 = silk_ADD_POS_SAT32( res_nrg_Q15, res_nrg_Q15_subfr );
+ rate_dist_Q7 = silk_ADD_POS_SAT32( rate_dist_Q7, rate_dist_Q7_subfr );
sum_log_gain_tmp_Q7 = silk_max(0, sum_log_gain_tmp_Q7
+ silk_lin2log( gain_safety + gain_Q7 ) - SILK_FIX_CONST( 7, 7 ));
- b_Q14_ptr += LTP_ORDER;
- W_Q18_ptr += LTP_ORDER * LTP_ORDER;
+ XX_Q17_ptr += LTP_ORDER * LTP_ORDER;
+ xX_Q17_ptr += LTP_ORDER;
}
- /* Avoid never finding a codebook */
- rate_dist_Q14 = silk_min( silk_int32_MAX - 1, rate_dist_Q14 );
-
- if( rate_dist_Q14 < min_rate_dist_Q14 ) {
- min_rate_dist_Q14 = rate_dist_Q14;
+ if( rate_dist_Q7 <= min_rate_dist_Q7 ) {
+ min_rate_dist_Q7 = rate_dist_Q7;
*periodicity_index = (opus_int8)k;
silk_memcpy( cbk_index, temp_idx, nb_subfr * sizeof( opus_int8 ) );
best_sum_log_gain_Q7 = sum_log_gain_tmp_Q7;
}
-
- /* Break early in low-complexity mode if rate distortion is below threshold */
- if( lowComplexity && ( rate_dist_Q14 < silk_LTP_gain_middle_avg_RD_Q14 ) ) {
- break;
- }
}
cbk_ptr_Q7 = silk_LTP_vq_ptrs_Q7[ *periodicity_index ];
@@ -125,5 +120,13 @@ void silk_quant_LTP_gains(
B_Q14[ j * LTP_ORDER + k ] = silk_LSHIFT( cbk_ptr_Q7[ cbk_index[ j ] * LTP_ORDER + k ], 7 );
}
}
+
+ if( nb_subfr == 2 ) {
+ res_nrg_Q15 = silk_RSHIFT32( res_nrg_Q15, 1 );
+ } else {
+ res_nrg_Q15 = silk_RSHIFT32( res_nrg_Q15, 2 );
+ }
+
*sum_log_gain_Q7 = best_sum_log_gain_Q7;
+ *pred_gain_dB_Q7 = (opus_int)silk_SMULBB( -3, silk_lin2log( res_nrg_Q15 ) - ( 15 << 7 ) );
}