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Moves CELT PLC pitch search to a separate function to reduce peak stack

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This commit is contained in:
Jean-Marc Valin 2014-01-07 15:02:43 -05:00
parent c25836205d
commit b63e7110cb
1 changed files with 17 additions and 9 deletions
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26
celt/celt_decoder.c
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@ -403,6 +403,22 @@ 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 int celt_plc_pitch_search(celt_sig *decode_mem[2], int C, int arch)
{
int pitch_index;
SAVE_STACK;
VARDECL( opus_val16, lp_pitch_buf );
ALLOC( lp_pitch_buf, DECODE_BUFFER_SIZE>>1, opus_val16 );
pitch_downsample(decode_mem, lp_pitch_buf,
DECODE_BUFFER_SIZE, C, arch);
pitch_search(lp_pitch_buf+(PLC_PITCH_LAG_MAX>>1), lp_pitch_buf,
DECODE_BUFFER_SIZE-PLC_PITCH_LAG_MAX,
PLC_PITCH_LAG_MAX-PLC_PITCH_LAG_MIN, &pitch_index, arch);
pitch_index = PLC_PITCH_LAG_MAX-pitch_index;
RESTORE_STACK;
return pitch_index;
}
static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, int N, int LM)
{
int c;
@ -512,15 +528,7 @@ static void celt_decode_lost(CELTDecoder * OPUS_RESTRICT st, int N, int LM)
if (loss_count == 0)
{
VARDECL( opus_val16, lp_pitch_buf );
ALLOC( lp_pitch_buf, DECODE_BUFFER_SIZE>>1, opus_val16 );
pitch_downsample(decode_mem, lp_pitch_buf,
DECODE_BUFFER_SIZE, C, st->arch);
pitch_search(lp_pitch_buf+(PLC_PITCH_LAG_MAX>>1), lp_pitch_buf,
DECODE_BUFFER_SIZE-PLC_PITCH_LAG_MAX,
PLC_PITCH_LAG_MAX-PLC_PITCH_LAG_MIN, &pitch_index, st->arch);
pitch_index = PLC_PITCH_LAG_MAX-pitch_index;
st->last_pitch_index = pitch_index;
st->last_pitch_index = pitch_index = celt_plc_pitch_search(decode_mem, C, st->arch);
} else {
pitch_index = st->last_pitch_index;
fade = QCONST16(.8f,15);