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Using overlap=shortMdctSize even for 2.5 ms frames.

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And fixed a post-filter bug for that special case.
This commit is contained in:
Jean-Marc Valin 2010-12-13 13:50:29 -05:00
parent 546dfa1959
commit 70d30ffc09
2 changed files with 36 additions and 13 deletions
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27
libcelt/celt.c
View file

@ -84,6 +84,10 @@ struct CELTEncoder {
int prefilter_period;
celt_word16 prefilter_gain;
#ifdef RESYNTH
int prefilter_period_old;
celt_word16 prefilter_gain_old;
#endif
/* VBR-related parameters */
celt_int32 vbr_reservoir;
@ -863,6 +867,7 @@ int celt_encode_with_ec_float(CELTEncoder * restrict st, const celt_sig * pcm, i
#endif /* ENABLE_POSTFILTER */
c=0; do {
st->prefilter_period=IMAX(st->prefilter_period, COMBFILTER_MINPERIOD);
CELT_COPY(in+c*(N+st->overlap), st->in_mem+c*(st->overlap), st->overlap);
#ifdef ENABLE_POSTFILTER
comb_filter(in+c*(N+st->overlap)+st->overlap, pre[c]+COMBFILTER_MAXPERIOD,
@ -1179,14 +1184,24 @@ int celt_encode_with_ec_float(CELTEncoder * restrict st, const celt_sig * pcm, i
#ifdef ENABLE_POSTFILTER
c=0; do {
st->prefilter_period=IMAX(st->prefilter_period, COMBFILTER_MINPERIOD);
st->prefilter_period_old=IMAX(st->prefilter_period_old, COMBFILTER_MINPERIOD);
if (LM!=0)
{
comb_filter(out_mem[c], out_mem[c], st->prefilter_period, st->prefilter_period, st->overlap, C,
st->prefilter_gain, st->prefilter_gain, NULL, 0);
comb_filter(out_mem[c]+st->overlap, out_mem[c]+st->overlap, st->prefilter_period, pitch_index, N-st->overlap, C,
st->prefilter_gain, gain1, st->mode->window, st->mode->overlap);
} else {
comb_filter(out_mem[c], out_mem[c], st->prefilter_period_old, st->prefilter_period, N, C,
st->prefilter_gain_old, st->prefilter_gain, st->mode->window, st->mode->overlap);
}
} while (++c<C);
#endif /* ENABLE_POSTFILTER */
deemphasis(out_mem, (celt_word16*)pcm, N, C, st->mode->preemph, st->preemph_memD);
st->prefilter_period_old = st->prefilter_period;
st->prefilter_gain_old = st->prefilter_gain;
}
#endif
@ -1407,7 +1422,9 @@ struct CELTDecoder {
int last_pitch_index;
int loss_count;
int postfilter_period;
int postfilter_period_old;
celt_word16 postfilter_gain;
celt_word16 postfilter_gain_old;
celt_sig preemph_memD[2];
@ -1889,11 +1906,21 @@ int celt_decode_with_ec_float(CELTDecoder * restrict st, const unsigned char *da
#ifdef ENABLE_POSTFILTER
c=0; do {
st->postfilter_period=IMAX(st->postfilter_period, COMBFILTER_MINPERIOD);
st->postfilter_period_old=IMAX(st->postfilter_period_old, COMBFILTER_MINPERIOD);
if (LM!=0)
{
comb_filter(out_syn[c], out_syn[c], st->postfilter_period, st->postfilter_period, st->overlap, C,
st->postfilter_gain, st->postfilter_gain, NULL, 0);
comb_filter(out_syn[c]+st->overlap, out_syn[c]+st->overlap, st->postfilter_period, postfilter_pitch, N-st->overlap, C,
st->postfilter_gain, postfilter_gain, st->mode->window, st->mode->overlap);
} else {
comb_filter(out_syn[c], out_syn[c], st->postfilter_period_old, st->postfilter_period, N-st->overlap, C,
st->postfilter_gain_old, st->postfilter_gain, st->mode->window, st->mode->overlap);
}
} while (++c<C);
st->postfilter_period_old = st->postfilter_period;
st->postfilter_gain_old = st->postfilter_gain;
st->postfilter_period = postfilter_pitch;
st->postfilter_gain = postfilter_gain;
#endif /* ENABLE_POSTFILTER */

6
libcelt/modes.c
View file

@ -365,11 +365,7 @@ CELTMode *celt_mode_create(celt_int32 Fs, int frame_size, int *error)
mode->effEBands--;
/* Overlap must be divisible by 4 */
if (mode->nbShortMdcts > 1)
mode->overlap = (mode->shortMdctSize>>2)<<2;
else
mode->overlap = (frame_size>>3)<<2;
mode->overlap = ((mode->shortMdctSize>>2)<<2);
compute_allocation_table(mode, res);
if (mode->allocVectors==NULL)