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Fix 40/60ms zero-length frame decode failure

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Decoding failed with OPUS_BAD_ARG on a packet containing a 40ms or
60ms zero-length frame when it followed a hybrid or MDCT frame.
It now invokes the PLC for the duration of the packet as expected.

Signed-off-by: Jean-Marc Valin <jmvalin@jmvalin.ca>
This commit is contained in:
Mark Harris 2013-10-07 18:50:59 -07:00 • committed by Jean-Marc Valin
parent dbc83d316c
commit b88a3ad396
1 changed files with 18 additions and 8 deletions
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26
src/opus_decoder.c
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@ -257,24 +257,34 @@ static int opus_decode_frame(OpusDecoder *st, const unsigned char *data,
ec_dec_init(&dec,(unsigned char*)data,len);
} else {
audiosize = frame_size;
mode = st->prev_mode;
if (st->prev_mode == 0)
if (mode == 0)
{
/* If we haven't got any packet yet, all we can do is return zeros */
for (i=0;i<audiosize*st->channels;i++)
pcm[i] = 0;
RESTORE_STACK;
return audiosize;
} else {
mode = st->prev_mode;
}
if (mode != MODE_SILK_ONLY && audiosize > F20)
{
do {
int ret = opus_decode_frame(st, NULL, 0, pcm, IMIN(audiosize, F20), 0);
if (ret<0)
{
RESTORE_STACK;
return ret;
}
pcm += ret*st->channels;
audiosize -= ret;
} while (audiosize > 0);
RESTORE_STACK;
return frame_size;
}
}
/* For CELT/hybrid PLC of more than 20 ms, opus_decode_native() will do
multiple calls */
if (data==NULL && mode != MODE_SILK_ONLY)
frame_size = IMIN(frame_size, F20);
pcm_transition_silk_size = 0;
pcm_transition_celt_size = 0;
if (data!=NULL && st->prev_mode > 0 && (