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Encoding the tf parameters after coarse energy

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Also a minor cleanup to the recombining/division
This commit is contained in:
Jean-Marc Valin 2010-06-05 23:12:19 -04:00
parent 47ad4a0938
commit 0a571ef92a
2 changed files with 32 additions and 31 deletions
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13
libcelt/bands.c
View file

@ -808,6 +808,8 @@ static void quant_band(int encode, const CELTMode *m, int i, celt_norm *X, celt_
if (resynth)
{
int k;
if (split)
{
int j;
@ -831,9 +833,7 @@ static void quant_band(int encode, const CELTMode *m, int i, celt_norm *X, celt_
if (lowband)
interleave_vector(lowband, N_B, spread0);
}
if (time_divide)
{
int k;
N_B = N_B0;
spread = spread0;
for (k=0;k<time_divide;k++)
@ -844,13 +844,7 @@ static void quant_band(int encode, const CELTMode *m, int i, celt_norm *X, celt_
if (lowband)
haar1(lowband, N_B, spread);
}
}
if (!stereo && level == 0)
{
int k;
spread = spread0;
N_B = N_B0;
for (k=0;k<recombine;k++)
{
haar1(X, N_B, spread);
@ -859,7 +853,6 @@ static void quant_band(int encode, const CELTMode *m, int i, celt_norm *X, celt_
N_B>>=1;
spread <<= 1;
}
}
if (lowband_out && !stereo)
{

20
libcelt/celt.c
View file

@ -536,9 +536,9 @@ static void mdct_shape(const CELTMode *mode, celt_norm *X, int start,
renormalise_bands(mode, X, C, M);
}
static void tf_encode(celt_word16 *bandLogE, celt_word16 *oldBandE, int len, int C, int isTransient, int *tf_res, int nbCompressedBytes, ec_enc *enc)
static void tf_analysis(celt_word16 *bandLogE, celt_word16 *oldBandE, int len, int C, int isTransient, int *tf_res, int nbCompressedBytes)
{
int i, curr;
int i;
celt_word16 threshold;
VARDECL(celt_word32, metric);
celt_word32 cost0;
@ -614,6 +614,12 @@ static void tf_encode(celt_word16 *bandLogE, celt_word16 *oldBandE, int len, int
else
tf_res[i] = path0[i+1];
}
RESTORE_STACK
}
static void tf_encode(int len, int isTransient, int *tf_res, ec_enc *enc)
{
int curr, i;
ec_enc_bit_prob(enc, tf_res[0], isTransient ? 16384 : 4096);
curr = tf_res[0];
for (i=1;i<len;i++)
@ -621,7 +627,6 @@ static void tf_encode(celt_word16 *bandLogE, celt_word16 *oldBandE, int len, int
ec_enc_bit_prob(enc, tf_res[i] ^ curr, 4096);
curr = tf_res[i];
}
RESTORE_STACK
}
static void tf_decode(int len, int C, int isTransient, int *tf_res, ec_dec *dec)
@ -905,7 +910,7 @@ int celt_encode_with_ec_float(CELTEncoder * restrict st, const celt_sig * pcm, c
}
ALLOC(tf_res, st->mode->nbEBands, int);
tf_encode(bandLogE, st->oldBandE, st->mode->nbEBands, C, isTransient, tf_res, nbCompressedBytes, enc);
tf_analysis(bandLogE, st->oldBandE, st->mode->nbEBands, C, isTransient, tf_res, nbCompressedBytes);
/* Bit allocation */
ALLOC(error, C*st->mode->nbEBands, celt_word16);
@ -970,6 +975,8 @@ int celt_encode_with_ec_float(CELTEncoder * restrict st, const celt_sig * pcm, c
ec_byte_shrink(&buf, nbCompressedBytes);
}
tf_encode(st->mode->nbEBands, isTransient, tf_res, enc);
ALLOC(offsets, st->mode->nbEBands, int);
ALLOC(fine_priority, st->mode->nbEBands, int);
@ -1691,13 +1698,14 @@ int celt_decode_with_ec_float(CELTDecoder * restrict st, const unsigned char *da
pitch_index = 0;
}
ALLOC(tf_res, st->mode->nbEBands, int);
tf_decode(st->mode->nbEBands, C, isTransient, tf_res, dec);
ALLOC(fine_quant, st->mode->nbEBands, int);
/* Get band energies */
unquant_coarse_energy(st->mode, st->start, bandE, st->oldBandE, len*4-8, intra_ener, st->mode->prob, dec, C);
ALLOC(tf_res, st->mode->nbEBands, int);
tf_decode(st->mode->nbEBands, C, isTransient, tf_res, dec);
ALLOC(pulses, st->mode->nbEBands, int);
ALLOC(offsets, st->mode->nbEBands, int);
ALLOC(fine_priority, st->mode->nbEBands, int);