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Taking into account TF decisions for VBR

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This commit is contained in:
Jean-Marc Valin 2010-10-13 01:11:55 -04:00
parent 0f8fc0bead
commit ccd5a61a69
1 changed files with 13 additions and 7 deletions
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20
libcelt/celt.c
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@ -392,7 +392,8 @@ static const signed char tf_select_table[4][8] = {
};
static int tf_analysis(const CELTMode *m, celt_word16 *bandLogE, celt_word16 *oldBandE,
int len, int C, int isTransient, int *tf_res, int nbCompressedBytes, celt_norm *X, int N0, int LM)
int len, int C, int isTransient, int *tf_res, int nbCompressedBytes, celt_norm *X,
int N0, int LM, int *tf_sum)
{
int i;
VARDECL(int, metric);
@ -426,6 +427,7 @@ static int tf_analysis(const CELTMode *m, celt_word16 *bandLogE, celt_word16 *ol
ALLOC(path0, len, int);
ALLOC(path1, len, int);
*tf_sum = 0;
for (i=0;i<len;i++)
{
int j, k, N;
@ -470,6 +472,7 @@ static int tf_analysis(const CELTMode *m, celt_word16 *bandLogE, celt_word16 *ol
metric[i] = best_level;
else
metric[i] = -best_level;
*tf_sum += metric[i];
}
/*printf("\n");*/
/* FIXME: Figure out how to set this */
@ -589,6 +592,7 @@ int celt_encode_with_ec_float(CELTEncoder * restrict st, const celt_sig * pcm, c
int nbFilledBytes, nbAvailableBytes;
int effEnd;
int codedBands;
int tf_sum;
int alloc_trim;
SAVE_STACK;
@ -756,7 +760,7 @@ int celt_encode_with_ec_float(CELTEncoder * restrict st, const celt_sig * pcm, c
ALLOC(tf_res, st->mode->nbEBands, int);
/* Needs to be before coarse energy quantization because otherwise the energy gets modified */
tf_select = tf_analysis(st->mode, bandLogE, oldBandE, effEnd, C, isTransient, tf_res, nbAvailableBytes, X, N, LM);
tf_select = tf_analysis(st->mode, bandLogE, oldBandE, effEnd, C, isTransient, tf_res, nbAvailableBytes, X, N, LM, &tf_sum);
for (i=effEnd;i<st->end;i++)
tf_res[i] = tf_res[effEnd-1];
@ -873,15 +877,17 @@ int celt_encode_with_ec_float(CELTEncoder * restrict st, const celt_sig * pcm, c
target=vbr_rate;
/* Shortblocks get a large boost in bitrate, but since they
are uncommon long blocks are not greatly effected */
if (shortBlocks)
target*=2;
are uncommon long blocks are not greatly affected */
if (shortBlocks || tf_sum < -2*(st->end-st->start))
target*=2;
else if (tf_sum < -(st->end-st->start))
target = 3*target/2;
else if (M > 1)
target-=(target+14)/28;
target-=(target+14)/28;
/* The average energy is removed from the target and the actual
energy added*/
target=target+st->vbr_offset-588+ec_enc_tell(enc, BITRES);
target=target+st->vbr_offset-(50<<BITRES)+ec_enc_tell(enc, BITRES);
/* In VBR mode the frame size must not be reduced so much that it would result in the coarse energy busting its budget */
target=IMIN(nbAvailableBytes,target);