summaryrefslogtreecommitdiff
path: root/src/opus-1.1/celt/quant_bands.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/opus-1.1/celt/quant_bands.c')
-rw-r--r--src/opus-1.1/celt/quant_bands.c556
1 files changed, 0 insertions, 556 deletions
diff --git a/src/opus-1.1/celt/quant_bands.c b/src/opus-1.1/celt/quant_bands.c
deleted file mode 100644
index ac6952c2..00000000
--- a/src/opus-1.1/celt/quant_bands.c
+++ /dev/null
@@ -1,556 +0,0 @@
-/* Copyright (c) 2007-2008 CSIRO
- Copyright (c) 2007-2009 Xiph.Org Foundation
- Written by Jean-Marc Valin */
-/*
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
-
- - Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
-
- - Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "quant_bands.h"
-#include "laplace.h"
-#include <math.h>
-#include "os_support.h"
-#include "arch.h"
-#include "mathops.h"
-#include "stack_alloc.h"
-#include "rate.h"
-
-#ifdef FIXED_POINT
-/* Mean energy in each band quantized in Q4 */
-const signed char eMeans[25] = {
- 103,100, 92, 85, 81,
- 77, 72, 70, 78, 75,
- 73, 71, 78, 74, 69,
- 72, 70, 74, 76, 71,
- 60, 60, 60, 60, 60
-};
-#else
-/* Mean energy in each band quantized in Q4 and converted back to float */
-const opus_val16 eMeans[25] = {
- 6.437500f, 6.250000f, 5.750000f, 5.312500f, 5.062500f,
- 4.812500f, 4.500000f, 4.375000f, 4.875000f, 4.687500f,
- 4.562500f, 4.437500f, 4.875000f, 4.625000f, 4.312500f,
- 4.500000f, 4.375000f, 4.625000f, 4.750000f, 4.437500f,
- 3.750000f, 3.750000f, 3.750000f, 3.750000f, 3.750000f
-};
-#endif
-/* prediction coefficients: 0.9, 0.8, 0.65, 0.5 */
-#ifdef FIXED_POINT
-static const opus_val16 pred_coef[4] = {29440, 26112, 21248, 16384};
-static const opus_val16 beta_coef[4] = {30147, 22282, 12124, 6554};
-static const opus_val16 beta_intra = 4915;
-#else
-static const opus_val16 pred_coef[4] = {29440/32768., 26112/32768., 21248/32768., 16384/32768.};
-static const opus_val16 beta_coef[4] = {30147/32768., 22282/32768., 12124/32768., 6554/32768.};
-static const opus_val16 beta_intra = 4915/32768.;
-#endif
-
-/*Parameters of the Laplace-like probability models used for the coarse energy.
- There is one pair of parameters for each frame size, prediction type
- (inter/intra), and band number.
- The first number of each pair is the probability of 0, and the second is the
- decay rate, both in Q8 precision.*/
-static const unsigned char e_prob_model[4][2][42] = {
- /*120 sample frames.*/
- {
- /*Inter*/
- {
- 72, 127, 65, 129, 66, 128, 65, 128, 64, 128, 62, 128, 64, 128,
- 64, 128, 92, 78, 92, 79, 92, 78, 90, 79, 116, 41, 115, 40,
- 114, 40, 132, 26, 132, 26, 145, 17, 161, 12, 176, 10, 177, 11
- },
- /*Intra*/
- {
- 24, 179, 48, 138, 54, 135, 54, 132, 53, 134, 56, 133, 55, 132,
- 55, 132, 61, 114, 70, 96, 74, 88, 75, 88, 87, 74, 89, 66,
- 91, 67, 100, 59, 108, 50, 120, 40, 122, 37, 97, 43, 78, 50
- }
- },
- /*240 sample frames.*/
- {
- /*Inter*/
- {
- 83, 78, 84, 81, 88, 75, 86, 74, 87, 71, 90, 73, 93, 74,
- 93, 74, 109, 40, 114, 36, 117, 34, 117, 34, 143, 17, 145, 18,
- 146, 19, 162, 12, 165, 10, 178, 7, 189, 6, 190, 8, 177, 9
- },
- /*Intra*/
- {
- 23, 178, 54, 115, 63, 102, 66, 98, 69, 99, 74, 89, 71, 91,
- 73, 91, 78, 89, 86, 80, 92, 66, 93, 64, 102, 59, 103, 60,
- 104, 60, 117, 52, 123, 44, 138, 35, 133, 31, 97, 38, 77, 45
- }
- },
- /*480 sample frames.*/
- {
- /*Inter*/
- {
- 61, 90, 93, 60, 105, 42, 107, 41, 110, 45, 116, 38, 113, 38,
- 112, 38, 124, 26, 132, 27, 136, 19, 140, 20, 155, 14, 159, 16,
- 158, 18, 170, 13, 177, 10, 187, 8, 192, 6, 175, 9, 159, 10
- },
- /*Intra*/
- {
- 21, 178, 59, 110, 71, 86, 75, 85, 84, 83, 91, 66, 88, 73,
- 87, 72, 92, 75, 98, 72, 105, 58, 107, 54, 115, 52, 114, 55,
- 112, 56, 129, 51, 132, 40, 150, 33, 140, 29, 98, 35, 77, 42
- }
- },
- /*960 sample frames.*/
- {
- /*Inter*/
- {
- 42, 121, 96, 66, 108, 43, 111, 40, 117, 44, 123, 32, 120, 36,
- 119, 33, 127, 33, 134, 34, 139, 21, 147, 23, 152, 20, 158, 25,
- 154, 26, 166, 21, 173, 16, 184, 13, 184, 10, 150, 13, 139, 15
- },
- /*Intra*/
- {
- 22, 178, 63, 114, 74, 82, 84, 83, 92, 82, 103, 62, 96, 72,
- 96, 67, 101, 73, 107, 72, 113, 55, 118, 52, 125, 52, 118, 52,
- 117, 55, 135, 49, 137, 39, 157, 32, 145, 29, 97, 33, 77, 40
- }
- }
-};
-
-static const unsigned char small_energy_icdf[3]={2,1,0};
-
-static opus_val32 loss_distortion(const opus_val16 *eBands, opus_val16 *oldEBands, int start, int end, int len, int C)
-{
- int c, i;
- opus_val32 dist = 0;
- c=0; do {
- for (i=start;i<end;i++)
- {
- opus_val16 d = SUB16(SHR16(eBands[i+c*len], 3), SHR16(oldEBands[i+c*len], 3));
- dist = MAC16_16(dist, d,d);
- }
- } while (++c<C);
- return MIN32(200,SHR32(dist,2*DB_SHIFT-6));
-}
-
-static int quant_coarse_energy_impl(const CELTMode *m, int start, int end,
- const opus_val16 *eBands, opus_val16 *oldEBands,
- opus_int32 budget, opus_int32 tell,
- const unsigned char *prob_model, opus_val16 *error, ec_enc *enc,
- int C, int LM, int intra, opus_val16 max_decay, int lfe)
-{
- int i, c;
- int badness = 0;
- opus_val32 prev[2] = {0,0};
- opus_val16 coef;
- opus_val16 beta;
-
- if (tell+3 <= budget)
- ec_enc_bit_logp(enc, intra, 3);
- if (intra)
- {
- coef = 0;
- beta = beta_intra;
- } else {
- beta = beta_coef[LM];
- coef = pred_coef[LM];
- }
-
- /* Encode at a fixed coarse resolution */
- for (i=start;i<end;i++)
- {
- c=0;
- do {
- int bits_left;
- int qi, qi0;
- opus_val32 q;
- opus_val16 x;
- opus_val32 f, tmp;
- opus_val16 oldE;
- opus_val16 decay_bound;
- x = eBands[i+c*m->nbEBands];
- oldE = MAX16(-QCONST16(9.f,DB_SHIFT), oldEBands[i+c*m->nbEBands]);
-#ifdef FIXED_POINT
- f = SHL32(EXTEND32(x),7) - PSHR32(MULT16_16(coef,oldE), 8) - prev[c];
- /* Rounding to nearest integer here is really important! */
- qi = (f+QCONST32(.5f,DB_SHIFT+7))>>(DB_SHIFT+7);
- decay_bound = EXTRACT16(MAX32(-QCONST16(28.f,DB_SHIFT),
- SUB32((opus_val32)oldEBands[i+c*m->nbEBands],max_decay)));
-#else
- f = x-coef*oldE-prev[c];
- /* Rounding to nearest integer here is really important! */
- qi = (int)floor(.5f+f);
- decay_bound = MAX16(-QCONST16(28.f,DB_SHIFT), oldEBands[i+c*m->nbEBands]) - max_decay;
-#endif
- /* Prevent the energy from going down too quickly (e.g. for bands
- that have just one bin) */
- if (qi < 0 && x < decay_bound)
- {
- qi += (int)SHR16(SUB16(decay_bound,x), DB_SHIFT);
- if (qi > 0)
- qi = 0;
- }
- qi0 = qi;
- /* If we don't have enough bits to encode all the energy, just assume
- something safe. */
- tell = ec_tell(enc);
- bits_left = budget-tell-3*C*(end-i);
- if (i!=start && bits_left < 30)
- {
- if (bits_left < 24)
- qi = IMIN(1, qi);
- if (bits_left < 16)
- qi = IMAX(-1, qi);
- }
- if (lfe && i>=2)
- qi = IMIN(qi, 0);
- if (budget-tell >= 15)
- {
- int pi;
- pi = 2*IMIN(i,20);
- ec_laplace_encode(enc, &qi,
- prob_model[pi]<<7, prob_model[pi+1]<<6);
- }
- else if(budget-tell >= 2)
- {
- qi = IMAX(-1, IMIN(qi, 1));
- ec_enc_icdf(enc, 2*qi^-(qi<0), small_energy_icdf, 2);
- }
- else if(budget-tell >= 1)
- {
- qi = IMIN(0, qi);
- ec_enc_bit_logp(enc, -qi, 1);
- }
- else
- qi = -1;
- error[i+c*m->nbEBands] = PSHR32(f,7) - SHL16(qi,DB_SHIFT);
- badness += abs(qi0-qi);
- q = (opus_val32)SHL32(EXTEND32(qi),DB_SHIFT);
-
- tmp = PSHR32(MULT16_16(coef,oldE),8) + prev[c] + SHL32(q,7);
-#ifdef FIXED_POINT
- tmp = MAX32(-QCONST32(28.f, DB_SHIFT+7), tmp);
-#endif
- oldEBands[i+c*m->nbEBands] = PSHR32(tmp, 7);
- prev[c] = prev[c] + SHL32(q,7) - MULT16_16(beta,PSHR32(q,8));
- } while (++c < C);
- }
- return lfe ? 0 : badness;
-}
-
-void quant_coarse_energy(const CELTMode *m, int start, int end, int effEnd,
- const opus_val16 *eBands, opus_val16 *oldEBands, opus_uint32 budget,
- opus_val16 *error, ec_enc *enc, int C, int LM, int nbAvailableBytes,
- int force_intra, opus_val32 *delayedIntra, int two_pass, int loss_rate, int lfe)
-{
- int intra;
- opus_val16 max_decay;
- VARDECL(opus_val16, oldEBands_intra);
- VARDECL(opus_val16, error_intra);
- ec_enc enc_start_state;
- opus_uint32 tell;
- int badness1=0;
- opus_int32 intra_bias;
- opus_val32 new_distortion;
- SAVE_STACK;
-
- intra = force_intra || (!two_pass && *delayedIntra>2*C*(end-start) && nbAvailableBytes > (end-start)*C);
- intra_bias = (opus_int32)((budget**delayedIntra*loss_rate)/(C*512));
- new_distortion = loss_distortion(eBands, oldEBands, start, effEnd, m->nbEBands, C);
-
- tell = ec_tell(enc);
- if (tell+3 > budget)
- two_pass = intra = 0;
-
- max_decay = QCONST16(16.f,DB_SHIFT);
- if (end-start>10)
- {
-#ifdef FIXED_POINT
- max_decay = MIN32(max_decay, SHL32(EXTEND32(nbAvailableBytes),DB_SHIFT-3));
-#else
- max_decay = MIN32(max_decay, .125f*nbAvailableBytes);
-#endif
- }
- if (lfe)
- max_decay=3;
- enc_start_state = *enc;
-
- ALLOC(oldEBands_intra, C*m->nbEBands, opus_val16);
- ALLOC(error_intra, C*m->nbEBands, opus_val16);
- OPUS_COPY(oldEBands_intra, oldEBands, C*m->nbEBands);
-
- if (two_pass || intra)
- {
- badness1 = quant_coarse_energy_impl(m, start, end, eBands, oldEBands_intra, budget,
- tell, e_prob_model[LM][1], error_intra, enc, C, LM, 1, max_decay, lfe);
- }
-
- if (!intra)
- {
- unsigned char *intra_buf;
- ec_enc enc_intra_state;
- opus_int32 tell_intra;
- opus_uint32 nstart_bytes;
- opus_uint32 nintra_bytes;
- opus_uint32 save_bytes;
- int badness2;
- VARDECL(unsigned char, intra_bits);
-
- tell_intra = ec_tell_frac(enc);
-
- enc_intra_state = *enc;
-
- nstart_bytes = ec_range_bytes(&enc_start_state);
- nintra_bytes = ec_range_bytes(&enc_intra_state);
- intra_buf = ec_get_buffer(&enc_intra_state) + nstart_bytes;
- save_bytes = nintra_bytes-nstart_bytes;
- if (save_bytes == 0)
- save_bytes = ALLOC_NONE;
- ALLOC(intra_bits, save_bytes, unsigned char);
- /* Copy bits from intra bit-stream */
- OPUS_COPY(intra_bits, intra_buf, nintra_bytes - nstart_bytes);
-
- *enc = enc_start_state;
-
- badness2 = quant_coarse_energy_impl(m, start, end, eBands, oldEBands, budget,
- tell, e_prob_model[LM][intra], error, enc, C, LM, 0, max_decay, lfe);
-
- if (two_pass && (badness1 < badness2 || (badness1 == badness2 && ((opus_int32)ec_tell_frac(enc))+intra_bias > tell_intra)))
- {
- *enc = enc_intra_state;
- /* Copy intra bits to bit-stream */
- OPUS_COPY(intra_buf, intra_bits, nintra_bytes - nstart_bytes);
- OPUS_COPY(oldEBands, oldEBands_intra, C*m->nbEBands);
- OPUS_COPY(error, error_intra, C*m->nbEBands);
- intra = 1;
- }
- } else {
- OPUS_COPY(oldEBands, oldEBands_intra, C*m->nbEBands);
- OPUS_COPY(error, error_intra, C*m->nbEBands);
- }
-
- if (intra)
- *delayedIntra = new_distortion;
- else
- *delayedIntra = ADD32(MULT16_32_Q15(MULT16_16_Q15(pred_coef[LM], pred_coef[LM]),*delayedIntra),
- new_distortion);
-
- RESTORE_STACK;
-}
-
-void quant_fine_energy(const CELTMode *m, int start, int end, opus_val16 *oldEBands, opus_val16 *error, int *fine_quant, ec_enc *enc, int C)
-{
- int i, c;
-
- /* Encode finer resolution */
- for (i=start;i<end;i++)
- {
- opus_int16 frac = 1<<fine_quant[i];
- if (fine_quant[i] <= 0)
- continue;
- c=0;
- do {
- int q2;
- opus_val16 offset;
-#ifdef FIXED_POINT
- /* Has to be without rounding */
- q2 = (error[i+c*m->nbEBands]+QCONST16(.5f,DB_SHIFT))>>(DB_SHIFT-fine_quant[i]);
-#else
- q2 = (int)floor((error[i+c*m->nbEBands]+.5f)*frac);
-#endif
- if (q2 > frac-1)
- q2 = frac-1;
- if (q2<0)
- q2 = 0;
- ec_enc_bits(enc, q2, fine_quant[i]);
-#ifdef FIXED_POINT
- offset = SUB16(SHR32(SHL32(EXTEND32(q2),DB_SHIFT)+QCONST16(.5f,DB_SHIFT),fine_quant[i]),QCONST16(.5f,DB_SHIFT));
-#else
- offset = (q2+.5f)*(1<<(14-fine_quant[i]))*(1.f/16384) - .5f;
-#endif
- oldEBands[i+c*m->nbEBands] += offset;
- error[i+c*m->nbEBands] -= offset;
- /*printf ("%f ", error[i] - offset);*/
- } while (++c < C);
- }
-}
-
-void quant_energy_finalise(const CELTMode *m, int start, int end, opus_val16 *oldEBands, opus_val16 *error, int *fine_quant, int *fine_priority, int bits_left, ec_enc *enc, int C)
-{
- int i, prio, c;
-
- /* Use up the remaining bits */
- for (prio=0;prio<2;prio++)
- {
- for (i=start;i<end && bits_left>=C ;i++)
- {
- if (fine_quant[i] >= MAX_FINE_BITS || fine_priority[i]!=prio)
- continue;
- c=0;
- do {
- int q2;
- opus_val16 offset;
- q2 = error[i+c*m->nbEBands]<0 ? 0 : 1;
- ec_enc_bits(enc, q2, 1);
-#ifdef FIXED_POINT
- offset = SHR16(SHL16(q2,DB_SHIFT)-QCONST16(.5f,DB_SHIFT),fine_quant[i]+1);
-#else
- offset = (q2-.5f)*(1<<(14-fine_quant[i]-1))*(1.f/16384);
-#endif
- oldEBands[i+c*m->nbEBands] += offset;
- bits_left--;
- } while (++c < C);
- }
- }
-}
-
-void unquant_coarse_energy(const CELTMode *m, int start, int end, opus_val16 *oldEBands, int intra, ec_dec *dec, int C, int LM)
-{
- const unsigned char *prob_model = e_prob_model[LM][intra];
- int i, c;
- opus_val32 prev[2] = {0, 0};
- opus_val16 coef;
- opus_val16 beta;
- opus_int32 budget;
- opus_int32 tell;
-
- if (intra)
- {
- coef = 0;
- beta = beta_intra;
- } else {
- beta = beta_coef[LM];
- coef = pred_coef[LM];
- }
-
- budget = dec->storage*8;
-
- /* Decode at a fixed coarse resolution */
- for (i=start;i<end;i++)
- {
- c=0;
- do {
- int qi;
- opus_val32 q;
- opus_val32 tmp;
- /* It would be better to express this invariant as a
- test on C at function entry, but that isn't enough
- to make the static analyzer happy. */
- celt_assert(c<2);
- tell = ec_tell(dec);
- if(budget-tell>=15)
- {
- int pi;
- pi = 2*IMIN(i,20);
- qi = ec_laplace_decode(dec,
- prob_model[pi]<<7, prob_model[pi+1]<<6);
- }
- else if(budget-tell>=2)
- {
- qi = ec_dec_icdf(dec, small_energy_icdf, 2);
- qi = (qi>>1)^-(qi&1);
- }
- else if(budget-tell>=1)
- {
- qi = -ec_dec_bit_logp(dec, 1);
- }
- else
- qi = -1;
- q = (opus_val32)SHL32(EXTEND32(qi),DB_SHIFT);
-
- oldEBands[i+c*m->nbEBands] = MAX16(-QCONST16(9.f,DB_SHIFT), oldEBands[i+c*m->nbEBands]);
- tmp = PSHR32(MULT16_16(coef,oldEBands[i+c*m->nbEBands]),8) + prev[c] + SHL32(q,7);
-#ifdef FIXED_POINT
- tmp = MAX32(-QCONST32(28.f, DB_SHIFT+7), tmp);
-#endif
- oldEBands[i+c*m->nbEBands] = PSHR32(tmp, 7);
- prev[c] = prev[c] + SHL32(q,7) - MULT16_16(beta,PSHR32(q,8));
- } while (++c < C);
- }
-}
-
-void unquant_fine_energy(const CELTMode *m, int start, int end, opus_val16 *oldEBands, int *fine_quant, ec_dec *dec, int C)
-{
- int i, c;
- /* Decode finer resolution */
- for (i=start;i<end;i++)
- {
- if (fine_quant[i] <= 0)
- continue;
- c=0;
- do {
- int q2;
- opus_val16 offset;
- q2 = ec_dec_bits(dec, fine_quant[i]);
-#ifdef FIXED_POINT
- offset = SUB16(SHR32(SHL32(EXTEND32(q2),DB_SHIFT)+QCONST16(.5f,DB_SHIFT),fine_quant[i]),QCONST16(.5f,DB_SHIFT));
-#else
- offset = (q2+.5f)*(1<<(14-fine_quant[i]))*(1.f/16384) - .5f;
-#endif
- oldEBands[i+c*m->nbEBands] += offset;
- } while (++c < C);
- }
-}
-
-void unquant_energy_finalise(const CELTMode *m, int start, int end, opus_val16 *oldEBands, int *fine_quant, int *fine_priority, int bits_left, ec_dec *dec, int C)
-{
- int i, prio, c;
-
- /* Use up the remaining bits */
- for (prio=0;prio<2;prio++)
- {
- for (i=start;i<end && bits_left>=C ;i++)
- {
- if (fine_quant[i] >= MAX_FINE_BITS || fine_priority[i]!=prio)
- continue;
- c=0;
- do {
- int q2;
- opus_val16 offset;
- q2 = ec_dec_bits(dec, 1);
-#ifdef FIXED_POINT
- offset = SHR16(SHL16(q2,DB_SHIFT)-QCONST16(.5f,DB_SHIFT),fine_quant[i]+1);
-#else
- offset = (q2-.5f)*(1<<(14-fine_quant[i]-1))*(1.f/16384);
-#endif
- oldEBands[i+c*m->nbEBands] += offset;
- bits_left--;
- } while (++c < C);
- }
- }
-}
-
-void amp2Log2(const CELTMode *m, int effEnd, int end,
- celt_ener *bandE, opus_val16 *bandLogE, int C)
-{
- int c, i;
- c=0;
- do {
- for (i=0;i<effEnd;i++)
- bandLogE[i+c*m->nbEBands] =
- celt_log2(SHL32(bandE[i+c*m->nbEBands],2))
- - SHL16((opus_val16)eMeans[i],6);
- for (i=effEnd;i<end;i++)
- bandLogE[c*m->nbEBands+i] = -QCONST16(14.f,DB_SHIFT);
- } while (++c < C);
-}
generated by cgit (git 2.34.1) at 2024-11-15 17:33:21 +0000