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aacenc: Merge quantize_band_cost() with quantize_and_encode_band().
If these two functions aren't matched results may be unexpected. Originally committed as revision 22655 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Alex Converse
parent
d692850bbb
commit
508f092a78
@ -100,7 +100,8 @@ static const uint8_t aac_cb_maxval[12] = {0, 1, 1, 2, 2, 4, 4, 7, 7, 12, 12, 16}
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*
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* @return quantization distortion
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*/
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static float quantize_band_cost(struct AACEncContext *s, const float *in,
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static float quantize_and_encode_band_cost(struct AACEncContext *s,
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PutBitContext *pb, const float *in,
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const float *scaled, int size, int scale_idx,
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int cb, const float lambda, const float uplim,
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int *bits)
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@ -130,120 +131,10 @@ static float quantize_band_cost(struct AACEncContext *s, const float *in,
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offs[0] = 1;
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for (i = 1; i < dim; i++)
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offs[i] = offs[i-1]*range;
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quantize_bands(s->qcoefs, in, scaled, size, Q34, !IS_CODEBOOK_UNSIGNED(cb), maxval);
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#endif /* USE_REALLY_FULL_SEARCH */
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for (i = 0; i < size; i += dim) {
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float mincost;
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int minidx = 0;
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int minbits = 0;
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const float *vec;
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#ifndef USE_REALLY_FULL_SEARCH
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int (*quants)[2] = &s->qcoefs[i];
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mincost = 0.0f;
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for (j = 0; j < dim; j++)
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mincost += in[i+j]*in[i+j];
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minidx = IS_CODEBOOK_UNSIGNED(cb) ? 0 : 40;
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minbits = ff_aac_spectral_bits[cb-1][minidx];
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mincost = mincost * lambda + minbits;
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for (j = 0; j < (1<<dim); j++) {
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float rd = 0.0f;
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int curbits;
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int curidx = IS_CODEBOOK_UNSIGNED(cb) ? 0 : 40;
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int same = 0;
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for (k = 0; k < dim; k++) {
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if ((j & (1 << k)) && quants[k][0] == quants[k][1]) {
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same = 1;
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break;
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}
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}
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if (same)
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continue;
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for (k = 0; k < dim; k++)
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curidx += quants[k][!!(j & (1 << k))] * offs[dim - 1 - k];
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curbits = ff_aac_spectral_bits[cb-1][curidx];
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vec = &ff_aac_codebook_vectors[cb-1][curidx*dim];
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#else
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mincost = INFINITY;
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vec = ff_aac_codebook_vectors[cb-1];
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for (j = 0; j < ff_aac_spectral_sizes[cb-1]; j++, vec += dim) {
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float rd = 0.0f;
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int curbits = ff_aac_spectral_bits[cb-1][j];
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#endif /* USE_REALLY_FULL_SEARCH */
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if (IS_CODEBOOK_UNSIGNED(cb)) {
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for (k = 0; k < dim; k++) {
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float t = fabsf(in[i+k]);
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float di;
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if (vec[k] == 64.0f) { //FIXME: slow
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//do not code with escape sequence small values
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if (t < 39.0f*IQ) {
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rd = INFINITY;
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break;
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}
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if (t >= CLIPPED_ESCAPE) {
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di = t - CLIPPED_ESCAPE;
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curbits += 21;
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} else {
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int c = av_clip(quant(t, Q), 0, 8191);
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di = t - c*cbrtf(c)*IQ;
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curbits += av_log2(c)*2 - 4 + 1;
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}
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} else {
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di = t - vec[k]*IQ;
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}
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if (vec[k] != 0.0f)
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curbits++;
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rd += di*di;
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}
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} else {
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for (k = 0; k < dim; k++) {
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float di = in[i+k] - vec[k]*IQ;
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rd += di*di;
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}
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}
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rd = rd * lambda + curbits;
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if (rd < mincost) {
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mincost = rd;
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minidx = j;
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minbits = curbits;
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}
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}
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cost += mincost;
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resbits += minbits;
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if (cost >= uplim)
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return uplim;
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if (!scaled) {
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abs_pow34_v(s->scoefs, in, size);
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scaled = s->scoefs;
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}
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if (bits)
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*bits = resbits;
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return cost;
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}
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static void quantize_and_encode_band(struct AACEncContext *s, PutBitContext *pb,
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const float *in, int size, int scale_idx,
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int cb, const float lambda)
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{
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const float IQ = ff_aac_pow2sf_tab[200 + scale_idx - SCALE_ONE_POS + SCALE_DIV_512];
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const float Q = ff_aac_pow2sf_tab[200 - scale_idx + SCALE_ONE_POS - SCALE_DIV_512];
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const float CLIPPED_ESCAPE = 165140.0f*IQ;
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const int dim = (cb < FIRST_PAIR_BT) ? 4 : 2;
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int i, j, k;
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#ifndef USE_REALLY_FULL_SEARCH
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const float Q34 = sqrtf(Q * sqrtf(Q));
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const int range = aac_cb_range[cb];
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const int maxval = aac_cb_maxval[cb];
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int offs[4];
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float *scaled = s->scoefs;
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#endif /* USE_REALLY_FULL_SEARCH */
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//START_TIMER
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if (!cb)
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return;
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#ifndef USE_REALLY_FULL_SEARCH
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offs[0] = 1;
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for (i = 1; i < dim; i++)
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offs[i] = offs[i-1]*range;
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abs_pow34_v(scaled, in, size);
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quantize_bands(s->qcoefs, in, scaled, size, Q34, !IS_CODEBOOK_UNSIGNED(cb), maxval);
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#endif /* USE_REALLY_FULL_SEARCH */
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for (i = 0; i < size; i += dim) {
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@ -277,12 +168,12 @@ static void quantize_and_encode_band(struct AACEncContext *s, PutBitContext *pb,
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curbits = ff_aac_spectral_bits[cb-1][curidx];
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vec = &ff_aac_codebook_vectors[cb-1][curidx*dim];
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#else
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vec = ff_aac_codebook_vectors[cb-1];
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mincost = INFINITY;
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vec = ff_aac_codebook_vectors[cb-1];
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for (j = 0; j < ff_aac_spectral_sizes[cb-1]; j++, vec += dim) {
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float rd = 0.0f;
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int curbits = ff_aac_spectral_bits[cb-1][j];
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int curidx = j;
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int curidx = j;
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#endif /* USE_REALLY_FULL_SEARCH */
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if (IS_CODEBOOK_UNSIGNED(cb)) {
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for (k = 0; k < dim; k++) {
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@ -322,6 +213,11 @@ static void quantize_and_encode_band(struct AACEncContext *s, PutBitContext *pb,
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minbits = curbits;
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}
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}
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cost += mincost;
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resbits += minbits;
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if (cost >= uplim)
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return uplim;
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if (pb) {
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put_bits(pb, ff_aac_spectral_bits[cb-1][minidx], ff_aac_spectral_codes[cb-1][minidx]);
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if (IS_CODEBOOK_UNSIGNED(cb))
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for (j = 0; j < dim; j++)
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@ -338,8 +234,28 @@ static void quantize_and_encode_band(struct AACEncContext *s, PutBitContext *pb,
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}
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}
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}
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}
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}
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//STOP_TIMER("quantize_and_encode")
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if (bits)
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*bits = resbits;
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return cost;
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}
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static float quantize_band_cost(struct AACEncContext *s, const float *in,
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const float *scaled, int size, int scale_idx,
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int cb, const float lambda, const float uplim,
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int *bits)
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{
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return quantize_and_encode_band_cost(s, NULL, in, scaled, size, scale_idx,
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cb, lambda, uplim, bits);
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}
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static void quantize_and_encode_band(struct AACEncContext *s, PutBitContext *pb,
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const float *in, int size, int scale_idx,
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int cb, const float lambda)
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{
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quantize_and_encode_band_cost(s, pb, in, NULL, size, scale_idx, cb, lambda,
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INFINITY, NULL);
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}
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/**
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