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ifdef out the precompute-partition-sums and partition-escape-search stuff

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This commit is contained in:
Josh Coalson
2001-04-18 22:59:25 +00:00
parent f76a3618a5
commit afcd877c84
1 changed files with 42 additions and 2 deletions
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44
src/libFLAC/encoder.c
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@@ -88,7 +88,9 @@ static unsigned encoder_evaluate_fixed_subframe_(const int32 signal[], int32 res
static unsigned encoder_evaluate_lpc_subframe_(const int32 signal[], int32 residual[], uint32 abs_residual[], uint32 abs_residual_partition_sums[], unsigned bits_per_residual_sample[], const real lp_coeff[], unsigned blocksize, unsigned subframe_bps, unsigned order, unsigned qlp_coeff_precision, unsigned rice_parameter, unsigned max_partition_order, FLAC__Subframe *subframe);
static unsigned encoder_evaluate_verbatim_subframe_(const int32 signal[], unsigned blocksize, unsigned subframe_bps, FLAC__Subframe *subframe);
static unsigned encoder_find_best_partition_order_(const int32 residual[], uint32 abs_residual[], uint32 abs_residual_partition_sums[], unsigned bits_per_residual_sample[], unsigned residual_samples, unsigned predictor_order, unsigned rice_parameter, unsigned max_partition_order, unsigned *best_partition_order, unsigned best_parameters[], unsigned best_raw_bits[]);
#ifdef PRECOMPUTE_PARTITION_SUMS
static unsigned encoder_precompute_partition_sums_(uint32 abs_residual[], uint32 abs_residual_partition_sums[], unsigned residual_samples, unsigned predictor_order, unsigned max_partition_order);
#endif
static bool encoder_set_partitioned_rice_(const uint32 abs_residual[], const uint32 abs_residual_partition_sums[], const unsigned bits_per_residual_sample[], const unsigned residual_samples, const unsigned predictor_order, unsigned rice_parameter, const unsigned partition_order, unsigned parameters[], unsigned raw_bits[], unsigned *bits);
static unsigned encoder_get_wasted_bits_(int32 signal[], unsigned samples);
@@ -1131,9 +1133,14 @@ unsigned encoder_evaluate_verbatim_subframe_(const int32 signal[], unsigned bloc
unsigned encoder_find_best_partition_order_(const int32 residual[], uint32 abs_residual[], uint32 abs_residual_partition_sums[], unsigned bits_per_residual_sample[], unsigned residual_samples, unsigned predictor_order, unsigned rice_parameter, unsigned max_partition_order, unsigned *best_partition_order, unsigned best_parameters[], unsigned best_raw_bits[])
{
int32 r;
#ifdef PRECOMPUTE_PARTITION_SUMS
int partition_order;
unsigned sum;
#else
unsigned partition_order;
#endif
unsigned residual_bits, best_residual_bits = 0;
unsigned residual_sample, sum;
unsigned residual_sample;
unsigned best_parameters_index = 0, parameters[2][1 << FLAC__MAX_RICE_PARTITION_ORDER], raw_bits[2][1 << FLAC__MAX_RICE_PARTITION_ORDER];
/* compute abs(residual) for use later */
@@ -1142,11 +1149,14 @@ unsigned encoder_find_best_partition_order_(const int32 residual[], uint32 abs_r
abs_residual[residual_sample] = (uint32)(r<0? -r : r);
}
#ifdef SEARCH_FOR_ESCAPES
/* compute silog2(residual) for use later */
for(residual_sample = 0; residual_sample < residual_samples; residual_sample++) {
bits_per_residual_sample[residual_sample] = FLAC__bitmath_silog2(residual[residual_sample]);
}
#endif
#ifdef PRECOMPUTE_PARTITION_SUMS
max_partition_order = encoder_precompute_partition_sums_(abs_residual, abs_residual_partition_sums, residual_samples, predictor_order, max_partition_order);
for(partition_order = (int)max_partition_order, sum = 0; partition_order >= 0; partition_order--) {
@@ -1161,12 +1171,26 @@ unsigned encoder_find_best_partition_order_(const int32 residual[], uint32 abs_r
best_parameters_index = !best_parameters_index;
}
}
#else
for(partition_order = 0; partition_order <= max_partition_order; partition_order++) {
if(!encoder_set_partitioned_rice_(abs_residual, abs_residual_partition_sums, bits_per_residual_sample, residual_samples, predictor_order, rice_parameter, partition_order, parameters[!best_parameters_index], raw_bits[!best_parameters_index], &residual_bits)) {
assert(best_residual_bits != 0);
break;
}
if(best_residual_bits == 0 || residual_bits < best_residual_bits) {
best_residual_bits = residual_bits;
*best_partition_order = partition_order;
best_parameters_index = !best_parameters_index;
}
}
#endif
memcpy(best_parameters, parameters[best_parameters_index], sizeof(unsigned)*(1<<(*best_partition_order)));
memcpy(best_raw_bits, raw_bits[best_parameters_index], sizeof(unsigned)*(1<<(*best_partition_order)));
return best_residual_bits;
}
#ifdef PRECOMPUTE_PARTITION_SUMS
unsigned encoder_precompute_partition_sums_(uint32 abs_residual[], uint32 abs_residual_partition_sums[], unsigned residual_samples, unsigned predictor_order, unsigned max_partition_order)
{
int partition_order;
@@ -1213,6 +1237,7 @@ unsigned encoder_precompute_partition_sums_(uint32 abs_residual[], uint32 abs_re
return max_partition_order;
}
#endif
#ifdef VARIABLE_RICE_BITS
#undef VARIABLE_RICE_BITS
@@ -1221,7 +1246,10 @@ unsigned encoder_precompute_partition_sums_(uint32 abs_residual[], uint32 abs_re
bool encoder_set_partitioned_rice_(const uint32 abs_residual[], const uint32 abs_residual_partition_sums[], const unsigned bits_per_residual_sample[], const unsigned residual_samples, const unsigned predictor_order, unsigned rice_parameter, const unsigned partition_order, unsigned parameters[], unsigned raw_bits[], unsigned *bits)
{
unsigned partition_bits, flat_bits, partition_max_bits_per_residual_sample;
unsigned partition_bits;
#ifdef SEARCH_FOR_ESCAPES
unsigned flat_bits, partition_max_bits_per_residual_sample;
#endif
unsigned bits_ = FLAC__ENTROPY_CODING_METHOD_TYPE_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN;
if(rice_parameter >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER)
@@ -1243,7 +1271,9 @@ bool encoder_set_partitioned_rice_(const uint32 abs_residual[], const uint32 abs
#endif
parameters[0] = rice_parameter;
partition_bits += FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
#ifdef SEARCH_FOR_ESCAPES
partition_max_bits_per_residual_sample = 0;
#endif
for(i = 0; i < residual_samples; i++) {
#ifdef VARIABLE_RICE_BITS
#ifdef SYMMETRIC_RICE
@@ -1254,15 +1284,19 @@ bool encoder_set_partitioned_rice_(const uint32 abs_residual[], const uint32 abs
#else
partition_bits += FLAC__bitbuffer_rice_bits(residual[i], rice_parameter); /* NOTE: we will need to pass in residual[] instead of abs_residual[] */
#endif
#ifdef SEARCH_FOR_ESCAPES
if(bits_per_residual_sample[i] > partition_max_bits_per_residual_sample)
partition_max_bits_per_residual_sample = bits_per_residual_sample[i];
#endif
}
#ifdef SEARCH_FOR_ESCAPES
flat_bits = partition_max_bits_per_residual_sample * residual_samples + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN;
if(flat_bits < partition_bits) {
parameters[0] = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
raw_bits[0] = partition_max_bits_per_residual_sample;
partition_bits = flat_bits;
}
#endif
}
bits_ += partition_bits;
}
@@ -1313,7 +1347,9 @@ mean>>=1;
--parameter;
#endif
#endif
#ifdef SEARCH_FOR_ESCAPES
partition_max_bits_per_residual_sample = 0;
#endif
for(k = 0; k < partition_samples; j++, k++) {
#ifdef VARIABLE_RICE_BITS
#ifdef SYMMETRIC_RICE
@@ -1324,15 +1360,19 @@ mean>>=1;
#else
partition_bits += FLAC__bitbuffer_rice_bits(residual[j], parameter); /* NOTE: we will need to pass in residual[] instead of abs_residual[] */
#endif
#ifdef SEARCH_FOR_ESCAPES
if(bits_per_residual_sample[j] > partition_max_bits_per_residual_sample)
partition_max_bits_per_residual_sample = bits_per_residual_sample[j];
#endif
}
#ifdef SEARCH_FOR_ESCAPES
flat_bits = partition_max_bits_per_residual_sample * partition_samples + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN;
if(flat_bits < partition_bits) {
parameters[i] = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
raw_bits[i] = partition_max_bits_per_residual_sample;
partition_bits = flat_bits;
}
#endif
bits_ += partition_bits;
}
}