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Doing a best for "unprotected" switches to 2.5 ms frames

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This commit is contained in:
Jean-Marc Valin 2011-10-13 12:39:15 -04:00
parent e2f1aac572
commit eb17b5e00e
1 changed files with 17 additions and 6 deletions
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13
src/opus_decoder.c
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@ -450,13 +450,24 @@ static int opus_decode_frame(OpusDecoder *st, const unsigned char *data,
pcm+st->channels*F2_5, F2_5, st->channels, window, st->Fs); pcm+st->channels*F2_5, F2_5, st->channels, window, st->Fs);
} }
if (transition) if (transition)
{
if (audiosize >= F5)
{ {
for (i=0;i<st->channels*F2_5;i++) for (i=0;i<st->channels*F2_5;i++)
pcm[i] = pcm_transition[i]; pcm[i] = pcm_transition[i];
if (audiosize >= F5)
smooth_fade(pcm_transition+st->channels*F2_5, pcm+st->channels*F2_5, smooth_fade(pcm_transition+st->channels*F2_5, pcm+st->channels*F2_5,
pcm+st->channels*F2_5, F2_5, pcm+st->channels*F2_5, F2_5,
st->channels, window, st->Fs); st->channels, window, st->Fs);
} else {
/* Not enough time to do a clean transition, but we do it anyway
This will not preserve amplitude perfectly and may introduce
a bit of temporal aliasing, but it shouldn't be too bad and
that's pretty much the best we can do. In any case, generating this
transition it pretty silly in the first place */
smooth_fade(pcm_transition, pcm,
pcm, F2_5,
st->channels, window, st->Fs);
}
} }
if (len <= 1) if (len <= 1)