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Moves deemphasis() call out of celt_decode_lost() to reduce peak stack

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Jean-Marc Valin 2014-01-07 04:32:41 -05:00
parent dce69d2b9b
commit 9d1b6fef2a
1 changed files with 7 additions and 11 deletions
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18
celt/celt_decoder.c
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@ -403,8 +403,7 @@ static void tf_decode(int start, int end, int isTransient, int *tf_res, int LM,
pitch of 480 Hz. */
#define PLC_PITCH_LAG_MIN (100)
static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, opus_val16 * OPUS_RESTRICT pcm,
int N, int LM, int accum)
static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, int N, int LM)
{
int c;
int i;
@ -417,7 +416,6 @@ static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, opus_val16 * OPUS_R
int nbEBands;
int overlap;
int start;
int downsample;
int loss_count;
int noise_based;
const opus_int16 *eBands;
@ -440,7 +438,6 @@ static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, opus_val16 * OPUS_R
loss_count = st->loss_count;
start = st->start;
downsample = st->downsample;
noise_based = loss_count >= 5 || start != 0;
if (noise_based)
{
@ -706,8 +703,6 @@ static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, opus_val16 * OPUS_R
} while (++c<C);
}
deemphasis(out_syn, pcm, N, C, downsample, mode->preemph, st->preemph_memD, accum);
st->loss_count = loss_count+1;
RESTORE_STACK;
@ -774,9 +769,6 @@ int celt_decode_with_ec(CELTDecoder * OPUS_RESTRICT st, const unsigned char *dat
end = st->end;
frame_size *= st->downsample;
c=0; do {
decode_mem[c] = st->_decode_mem + c*(DECODE_BUFFER_SIZE+overlap);
} while (++c<CC);
lpc = (opus_val16*)(st->_decode_mem+(DECODE_BUFFER_SIZE+overlap)*CC);
oldBandE = lpc+CC*LPC_ORDER;
oldLogE = oldBandE + 2*nbEBands;
@ -821,6 +813,10 @@ int celt_decode_with_ec(CELTDecoder * OPUS_RESTRICT st, const unsigned char *dat
return OPUS_BAD_ARG;
N = M*mode->shortMdctSize;
c=0; do {
decode_mem[c] = st->_decode_mem + c*(DECODE_BUFFER_SIZE+overlap);
out_syn[c] = decode_mem[c]+DECODE_BUFFER_SIZE-N;
} while (++c<CC);
effEnd = end;
if (effEnd > mode->effEBands)
@ -828,7 +824,8 @@ int celt_decode_with_ec(CELTDecoder * OPUS_RESTRICT st, const unsigned char *dat
if (data == NULL || len<=1)
{
celt_decode_lost(st, pcm, N, LM, accum);
celt_decode_lost(st, N, LM);
deemphasis(out_syn, pcm, N, CC, st->downsample, mode->preemph, st->preemph_memD, accum);
RESTORE_STACK;
return frame_size/st->downsample;
}
@ -962,7 +959,6 @@ int celt_decode_with_ec(CELTDecoder * OPUS_RESTRICT st, const unsigned char *dat
c=0; do {
OPUS_MOVE(decode_mem[c], decode_mem[c]+N, DECODE_BUFFER_SIZE-N+overlap/2);
out_syn[c] = decode_mem[c]+DECODE_BUFFER_SIZE-N;
} while (++c<CC);
/* Decode fixed codebook */