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audio: removed conditional from simple resampler's inner loop.

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We never seem to overflow the source buffer now; this might have been a
leftover from a bug that was covered by Vitaly's fixes?

Removing this conditional makes the resampler 10-20% faster. Left an
assert in there for debug builds, in case this still happens.
This commit is contained in:
Ryan C. Gordon 2017-01-20 16:26:24 -05:00
parent 4f981df37f
commit 83454c821f
1 changed files with 3 additions and 2 deletions
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5
src/audio/SDL_audiocvt.c
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@ -209,9 +209,10 @@ SDL_ResampleAudioSimple(const int chans, const double rate_incr,
SDL_assert((dest_samples * framelen) <= outbuflen); SDL_assert((dest_samples * framelen) <= outbuflen);
SDL_assert((inbuflen % framelen) == 0); SDL_assert((inbuflen % framelen) == 0);
while(dst < target) { while (dst < target) {
const int pos = ((int)idx) * chans; const int pos = ((int)idx) * chans;
const float *src = &inbuf[(pos >= finalpos) ? finalpos : pos]; const float *src = &inbuf[pos];
SDL_assert(pos <= finalpos);
for (i = 0; i < chans; i++) { for (i = 0; i < chans; i++) {
const float val = *(src++); const float val = *(src++);
*(dst++) = (val + last_sample[i]) * 0.5f; *(dst++) = (val + last_sample[i]) * 0.5f;