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More recombining "infrastructure"

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This commit is contained in:
Jean-Marc Valin 2010-05-25 23:54:56 -04:00
parent cee66b512e
commit 9d069846ee
1 changed files with 15 additions and 10 deletions
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25
libcelt/bands.c
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@ -492,7 +492,7 @@ static void quant_band(int encode, const CELTMode *m, int i, celt_norm *X, celt_
if (!stereo && spread > 1 && level == 0 && tf_change>0)
{
while (spread>1 && recombine<2)
while (spread>1 && tf_change>0)
{
spread>>=1;
N_B<<=1;
@ -501,6 +501,7 @@ static void quant_band(int encode, const CELTMode *m, int i, celt_norm *X, celt_
if (lowband)
haar1(lowband, N_B, spread);
recombine++;
tf_change--;
}
spread0=spread;
N_B0 = N_B;
@ -508,22 +509,26 @@ static void quant_band(int encode, const CELTMode *m, int i, celt_norm *X, celt_
if (!stereo && spread>1 && level==0)
{
if ((N_B&1) == 0 && tf_change<0)
while ((N_B&1) == 0 && tf_change<0 && spread <= (1<<LM))
{
if (encode)
haar1(X, N_B0, spread0);
haar1(X, N_B, spread);
if (lowband)
haar1(lowband, N_B0, spread0);
haar1(lowband, N_B, spread);
spread <<= 1;
N_B >>= 1;
time_divide++;
spread0 = spread;
N_B0 = N_B;
tf_change++;
}
spread0 = spread;
N_B0 = N_B;
if (spread0>1)
{
if (encode)
deinterleave_vector(X, N_B, spread0);
if (lowband)
deinterleave_vector(lowband, N_B, spread0);
}
if (encode)
deinterleave_vector(X, N_B, spread0);
if (lowband)
deinterleave_vector(lowband, N_B, spread0);
}
/* If we need more than 32 bits, try splitting the band in two. */