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Always use the max of the decaying PLC energy and the background noise

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Should no longer cause discontinuities in the noise after 5 packets
This commit is contained in:
Jean-Marc Valin 2015-12-03 13:32:10 -05:00
parent eda57aa386
commit 1970d5becd
1 changed files with 9 additions and 16 deletions
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25
celt/celt_decoder.c
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@ -457,10 +457,9 @@ static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, int N, int LM)
VARDECL(celt_norm, X);
#endif
opus_uint32 seed;
opus_val16 *plcLogE;
int end;
int effEnd;
opus_val16 decay;
end = st->end;
effEnd = IMAX(start, IMIN(end, mode->effEBands));
@ -472,19 +471,13 @@ static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, int N, int LM)
ALLOC(X, C*N, celt_norm); /**< Interleaved normalised MDCTs */
#endif
if (loss_count >= 5)
plcLogE = backgroundLogE;
else {
/* Energy decay */
opus_val16 decay = loss_count==0 ?
QCONST16(1.5f, DB_SHIFT) : QCONST16(.5f, DB_SHIFT);
c=0; do
{
for (i=start;i<end;i++)
oldBandE[c*nbEBands+i] -= decay;
} while (++c<C);
plcLogE = oldBandE;
}
/* Energy decay */
decay = loss_count==0 ? QCONST16(1.5f, DB_SHIFT) : QCONST16(.5f, DB_SHIFT);
c=0; do
{
for (i=start;i<end;i++)
oldBandE[c*nbEBands+i] = MAX16(backgroundLogE[c*nbEBands+i], oldBandE[c*nbEBands+i] - decay);
} while (++c<C);
seed = st->rng;
for (c=0;c<C;c++)
{
@ -510,7 +503,7 @@ static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, int N, int LM)
DECODE_BUFFER_SIZE-N+(overlap>>1));
} while (++c<C);
celt_synthesis(mode, X, out_syn, plcLogE, start, effEnd, C, C, 0, LM, st->downsample, 0, st->arch);
celt_synthesis(mode, X, out_syn, oldBandE, start, effEnd, C, C, 0, LM, st->downsample, 0, st->arch);
} else {
/* Pitch-based PLC */
const opus_val16 *window;