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VBR tuning

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This commit is contained in:
Jean-Marc Valin 2011-11-28 14:17:47 -05:00
parent a20545781e
commit 70d90d115d
2 changed files with 19 additions and 14 deletions
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30
celt/celt.c
View file

@ -823,7 +823,7 @@ static int alloc_trim_analysis(const CELTMode *m, const celt_norm *X,
trim_index-=1; trim_index-=1;
#ifndef FIXED_POINT #ifndef FIXED_POINT
trim += MAX16(-QCONST16(4.f, 8), .75f*log2(1.001-sum*sum)); trim += MAX16(-QCONST16(4.f, 8), .75f*log2(1.001-sum*sum));
*stereo_saving = -.5*log2(1.01-sum*sum); *stereo_saving = -.25*log2(1.01-sum*sum);
/*printf("%f\n", *stereo_saving);*/ /*printf("%f\n", *stereo_saving);*/
#else #else
*stereo_saving = 0; *stereo_saving = 0;
@ -854,17 +854,18 @@ static int alloc_trim_analysis(const CELTMode *m, const celt_norm *X,
if (analysis->valid) if (analysis->valid)
{ {
trim -= MAX16(-QCONST16(2.f, 8), MIN16(QCONST16(2.f, 8), 2*(analysis->tonality_slope+.05))); trim -= MAX16(-QCONST16(2.f, 8), MIN16(QCONST16(2.f, 8), 2*(analysis->tonality_slope+.05)));
if (analysis->tonality_slope > .15) /*if (analysis->tonality_slope > .15)
trim_index--; trim_index--;
if (analysis->tonality_slope > .3) if (analysis->tonality_slope > .3)
trim_index--; trim_index--;
if (analysis->tonality_slope < -.15) if (analysis->tonality_slope < -.15)
trim_index++; trim_index++;
if (analysis->tonality_slope < -.3) if (analysis->tonality_slope < -.3)
trim_index++; trim_index++;*/
} }
#endif #endif
trim_index = floor(.5+trim); /*printf("%d %f\n", trim_index, trim);*/
/*trim_index = floor(.5+trim);*/
if (trim_index<0) if (trim_index<0)
trim_index = 0; trim_index = 0;
if (trim_index>10) if (trim_index>10)
@ -1316,10 +1317,10 @@ int celt_encode_with_ec(CELTEncoder * restrict st, const opus_val16 * pcm, int f
} else { } else {
if (st->analysis.valid) if (st->analysis.valid)
{ {
static const opus_val16 spread_thresholds[3] = {-QCONST16(.7f, 15), -QCONST16(.3f, 15), -QCONST16(.1f, 15)}; static const opus_val16 spread_thresholds[3] = {-QCONST16(.6f, 15), -QCONST16(.2f, 15), -QCONST16(.07f, 15)};
static const opus_val16 spread_histeresis[3] = {QCONST16(.2f, 15), QCONST16(.1f, 15), QCONST16(.05f, 15)}; static const opus_val16 spread_histeresis[3] = {QCONST16(.15f, 15), QCONST16(.07f, 15), QCONST16(.02f, 15)};
static const opus_val16 tapset_thresholds[2] = {QCONST16(.0f, 15), QCONST16(.15f, 15)}; static const opus_val16 tapset_thresholds[2] = {QCONST16(.0f, 15), QCONST16(.15f, 15)};
static const opus_val16 tapset_histeresis[2] = {QCONST16(.05f, 15), QCONST16(.05f, 15)}; static const opus_val16 tapset_histeresis[2] = {QCONST16(.1f, 15), QCONST16(.05f, 15)};
st->spread_decision = hysteresis_decision(-st->analysis.tonality, spread_thresholds, spread_histeresis, 3, st->spread_decision); st->spread_decision = hysteresis_decision(-st->analysis.tonality, spread_thresholds, spread_histeresis, 3, st->spread_decision);
st->tapset_decision = hysteresis_decision(st->analysis.tonality_slope, tapset_thresholds, tapset_histeresis, 2, st->tapset_decision); st->tapset_decision = hysteresis_decision(st->analysis.tonality_slope, tapset_thresholds, tapset_histeresis, 2, st->tapset_decision);
} else { } else {
@ -1327,6 +1328,7 @@ int celt_encode_with_ec(CELTEncoder * restrict st, const opus_val16 * pcm, int f
&st->tonal_average, st->spread_decision, &st->hf_average, &st->tonal_average, st->spread_decision, &st->hf_average,
&st->tapset_decision, pf_on&&!shortBlocks, effEnd, C, M); &st->tapset_decision, pf_on&&!shortBlocks, effEnd, C, M);
} }
/*printf("%d %d\n", st->tapset_decision, st->spread_decision);*/
/*printf("%f %d %f %d\n\n", st->analysis.tonality, st->spread_decision, st->analysis.tonality_slope, st->tapset_decision);*/ /*printf("%f %d %f %d\n\n", st->analysis.tonality, st->spread_decision, st->analysis.tonality_slope, st->tapset_decision);*/
} }
ec_enc_icdf(enc, st->spread_decision, spread_icdf, 5); ec_enc_icdf(enc, st->spread_decision, spread_icdf, 5);
@ -1482,11 +1484,12 @@ int celt_encode_with_ec(CELTEncoder * restrict st, const opus_val16 * pcm, int f
if (st->constrained_vbr) if (st->constrained_vbr)
target += (st->vbr_offset>>lm_diff); target += (st->vbr_offset>>lm_diff);
/*printf("%f %f %f\n", st->analysis.activity, st->analysis.tonality, tf_estimate);*/
#ifndef FIXED_POINT #ifndef FIXED_POINT
if (st->analysis.valid && st->analysis.activity<.4) if (st->analysis.valid && st->analysis.activity<.4)
target -= (coded_bins<<BITRES)*2*(.4-st->analysis.activity); target -= (coded_bins<<BITRES)*1*(.4-st->analysis.activity);
if (C==2)
target -= MIN32(target/3, stereo_saving*(st->mode->eBands[intensity]<<LM<<BITRES)); target -= MIN32(target/3, stereo_saving*(st->mode->eBands[intensity]<<LM<<BITRES));
#endif #endif
#ifdef FIXED_POINT #ifdef FIXED_POINT
@ -1499,9 +1502,10 @@ int celt_encode_with_ec(CELTEncoder * restrict st, const opus_val16 * pcm, int f
if (st->analysis.valid) { if (st->analysis.valid) {
int tonal_target; int tonal_target;
float tonal; float tonal;
tonal = st->analysis.tonality; tonal = st->analysis.tonality*st->analysis.tonality;
tonal -= .06; tonal -= .08;
tonal_target = target + (coded_bins<<BITRES)*1.55*tonal; tonal_target = target + (coded_bins<<BITRES)*1.5f*tonal;
/*printf("%f %d\n", tonal, tonal_target);*/
new_target = IMAX(tonal_target,new_target); new_target = IMAX(tonal_target,new_target);
} }
#endif #endif

3
src/analysis.c
View file

@ -70,7 +70,7 @@ static const int tbands[NB_TBANDS+1] = {
2, 4, 6, 8, 10, 12, 14, 16, 20, 24, 28, 32, 40, 48, 56, 68, 80, 96, 120 2, 4, 6, 8, 10, 12, 14, 16, 20, 24, 28, 32, 40, 48, 56, 68, 80, 96, 120
}; };
#define NB_TONAL_SKIP_BANDS 8 #define NB_TONAL_SKIP_BANDS 0
typedef struct { typedef struct {
float angle[240]; float angle[240];
@ -260,6 +260,7 @@ void tonality_analysis(TonalityAnalysisState *tonal, AnalysisInfo *info, CELTEnc
if (b>=NB_TONAL_SKIP_BANDS) if (b>=NB_TONAL_SKIP_BANDS)
frame_tonality += band_tonality[b]; frame_tonality += band_tonality[b];
slope += band_tonality[b]*(b-8); slope += band_tonality[b]*(b-8);
/*printf("%f %f ", band_tonality[b], stationarity);*/
if (band_tonality[b] > info->boost_amount[1] && b>=7 && b < NB_TBANDS-1) if (band_tonality[b] > info->boost_amount[1] && b>=7 && b < NB_TBANDS-1)
{ {
if (band_tonality[b] > info->boost_amount[0]) if (band_tonality[b] > info->boost_amount[0])