eden-emu/opus
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Splitting the resampler buffering between encode and decode

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This commit is contained in:
Jean-Marc Valin 2011-02-21 14:05:10 -05:00
parent e3de5057b6
commit de32a5bf61
4 changed files with 30 additions and 5 deletions
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27
src/opus_decoder.c
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@ -36,7 +36,7 @@
#include "entdec.h"
#include "modes.h"
#include "SKP_Silk_SDK_API.h"
#include "SKP_Silk_SigProc_FIX.h"
OpusDecoder *opus_decoder_create(int Fs, int channels)
{
@ -166,6 +166,12 @@ int opus_decode(OpusDecoder *st, const unsigned char *data,
DecControl.internalSampleRate = 16000;
}
if (transition)
{
/*SKP_Silk_resampler_state_struct state;
SKP_Silk_resampler_init( &state, st->Fs, 16000);
*/
}
lost_flag = data == NULL ? 1 : 2 * decode_fec;
decoded_samples = 0;
do {
@ -219,8 +225,23 @@ int opus_decode(OpusDecoder *st, const unsigned char *data,
celt_decoder_ctl(st->celt_dec, CELT_RESET_STATE);
/* Decode CELT */
celt_ret = celt_decode_with_ec(st->celt_dec, decode_fec?NULL:data, len, pcm_celt, frame_size, &dec);
for (i=0;i<frame_size*st->channels;i++)
pcm[i] = ADD_SAT16(pcm[i], pcm_celt[i]);
/* Mix and add resampler delay compensation to CELT */
for (i=0;i<DECODER_DELAY*st->channels;i++)
pcm[i] = ADD_SAT16(pcm[i], st->delay_buffer[i+(DECODER_BUFFER-DECODER_DELAY)*st->channels]);
for (;i<frame_size*st->channels;i++)
pcm[i] = ADD_SAT16(pcm[i], pcm_celt[i-DECODER_DELAY*st->channels]);
if (frame_size>DECODER_BUFFER)
{
for (i=0;i<DECODER_BUFFER*st->channels;i++)
st->delay_buffer[i] = pcm_celt[(frame_size-DECODER_BUFFER)*st->channels+i];
} else {
int tmp = DECODER_BUFFER-frame_size;
for (i=0;i<tmp*st->channels;i++)
st->delay_buffer[i] = st->delay_buffer[i+frame_size*st->channels];
for (i=0;i<frame_size*st->channels;i++)
st->delay_buffer[tmp*st->channels+i] = pcm_celt[i];
}
}
if (transition)