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Fixes a few issues with PLC-based mode switching

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This commit is contained in:
Jean-Marc Valin 2011-03-07 23:53:53 -05:00
parent 0c0c5f940a
commit 1b16fec484
2 changed files with 13 additions and 10 deletions
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7
src/opus_decoder.c
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@ -152,7 +152,7 @@ int opus_decode(OpusDecoder *st, const unsigned char *data,
}
if (audiosize > frame_size)
{
fprintf(stderr, "PCM buffer too small");
fprintf(stderr, "PCM buffer too small: %d vs %d (mode = %d)\n", audiosize, frame_size, mode);
return -1;
} else {
frame_size = audiosize;
@ -302,14 +302,11 @@ int opus_decode(OpusDecoder *st, const unsigned char *data,
if (transition)
{
int plc_length, overlap;
if (mode == MODE_CELT_ONLY)
plc_length = IMIN(audiosize, 10+st->Fs/200);
else
plc_length = IMIN(audiosize, 10+st->Fs/400);
for (i=0;i<plc_length;i++)
pcm[i] = pcm_transition[i];
overlap = IMIN(st->Fs/100, IMAX(0, audiosize-plc_length));
overlap = IMIN(st->Fs/400, IMAX(0, audiosize-plc_length));
smooth_fade(pcm_transition+plc_length, pcm+plc_length, pcm+plc_length, overlap, st->channels);
}
#if OPUS_TEST_RANGE_CODER_STATE

10
src/opus_encoder.c
View file

@ -123,9 +123,15 @@ int opus_encode(OpusEncoder *st, const short *pcm, int frame_size,
redundancy = 1;
celt_to_silk = (st->mode != MODE_CELT_ONLY);
if (!celt_to_silk)
{
/* Switch to SILK/hybrid if frame size is 10 ms or more*/
if (frame_size >= st->Fs/100)
{
st->mode = st->prev_mode;
to_celt = 1;
} else {
redundancy=0;
}
}
}
@ -230,12 +236,12 @@ int opus_encode(OpusEncoder *st, const short *pcm, int frame_size,
celt_encoder_ctl(st->celt_enc, CELT_SET_BITRATE(510000));
if (st->prev_mode == MODE_SILK_ONLY)
{
unsigned char dummy[2];
unsigned char dummy[10];
celt_encoder_ctl(st->celt_enc, CELT_RESET_STATE);
celt_encoder_ctl(st->celt_enc, CELT_SET_START_BAND(0));
celt_encoder_ctl(st->celt_enc, CELT_SET_PREDICTION(0));
/* FIXME: This wastes CPU a bit compared to just prefilling the buffer */
celt_encode(st->celt_enc, &st->delay_buffer[(st->encoder_buffer-st->delay_compensation-120)*st->channels], 120, dummy, 10);
celt_encode(st->celt_enc, &st->delay_buffer[(st->encoder_buffer-st->delay_compensation-st->Fs/400)*st->channels], st->Fs/400, dummy, 10);
} else {
celt_encoder_ctl(st->celt_enc, CELT_SET_PREDICTION(2));
}