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MSVC optimization in process calls

This commit is contained in:
Josh Coalson 2007-04-04 01:07:40 +00:00
parent dca2d1a1d5
commit a0206629d3
1 changed files with 2 additions and 14 deletions
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16
src/libFLAC/stream_encoder.c
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@ -1967,23 +1967,11 @@ FLAC_API FLAC__bool FLAC__stream_encoder_process(FLAC__StreamEncoder *encoder, c
memcpy(&encoder->private_->integer_signal[channel][encoder->private_->current_sample_number], &buffer[channel][j], sizeof(buffer[channel][0]) * n);
if(encoder->protected_->do_mid_side_stereo) {
#ifdef _MSC_VER
FLAC__int32 x, mid, side;
#endif
FLAC__ASSERT(channels == 2);
/* "i <= blocksize" to overread 1 sample; see comment in OVERREAD_ decl */
for(i = encoder->private_->current_sample_number; i <= blocksize && j < samples; i++, j++) {
#ifdef _MSC_VER /* OPT: @@@@@@ make sure this is really faster on MSVC6, else drop it, make appropriate change in ..._interleaved() too */
mid = side = buffer[0][j];
x = buffer[1][j];
mid += x;
side -= x;
encoder->private_->integer_signal_mid_side[1][i] = side;
encoder->private_->integer_signal_mid_side[0][i] = mid >> 1; /* NOTE: not the same as 'mid = (buffer[0][j] + buffer[1][j]) / 2' ! */
#else
encoder->private_->integer_signal_mid_side[1][i] = buffer[0][j] - buffer[1][j];
encoder->private_->integer_signal_mid_side[0][i] = (buffer[0][j] + buffer[1][j]) >> 1; /* NOTE: not the same as 'mid = (buffer[0][j] + buffer[1][j]) / 2' ! */
#endif
}
}
else
@ -3913,7 +3901,7 @@ FLAC__bool set_partitioned_rice_(
raw_bits = partitioned_rice_contents->raw_bits;
if(partition_order == 0) {
best_partition_bits = 0xffffffff;
best_partition_bits = (unsigned)(-1);
#ifdef ENABLE_RICE_PARAMETER_SEARCH
if(rice_parameter_search_dist) {
if(suggested_rice_parameter < rice_parameter_search_dist)
@ -3989,7 +3977,7 @@ FLAC__bool set_partitioned_rice_(
rice_parameter = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER - 1;
}
best_partition_bits = 0xffffffff;
best_partition_bits = (unsigned)(-1);
#ifdef ENABLE_RICE_PARAMETER_SEARCH
if(rice_parameter_search_dist) {
if(rice_parameter < rice_parameter_search_dist)