946 lines
28 KiB
C
946 lines
28 KiB
C
/* (C) 2007-2008 Jean-Marc Valin, CSIRO
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(C) 2008-2009 Gregory Maxwell */
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <math.h>
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#include "bands.h"
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#include "modes.h"
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#include "vq.h"
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#include "cwrs.h"
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#include "stack_alloc.h"
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#include "os_support.h"
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#include "mathops.h"
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#include "rate.h"
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const celt_word16_t sqrtC_1[2] = {QCONST16(1.f, 14), QCONST16(1.414214f, 14)};
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#ifdef FIXED_POINT
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/* Compute the amplitude (sqrt energy) in each of the bands */
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void compute_band_energies(const CELTMode *m, const celt_sig_t *X, celt_ener_t *bank)
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{
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int i, c, N;
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const celt_int16_t *eBands = m->eBands;
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const int C = CHANNELS(m);
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N = FRAMESIZE(m);
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for (c=0;c<C;c++)
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{
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for (i=0;i<m->nbEBands;i++)
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{
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int j;
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celt_word32_t maxval=0;
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celt_word32_t sum = 0;
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j=eBands[i]; do {
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maxval = MAX32(maxval, X[j+c*N]);
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maxval = MAX32(maxval, -X[j+c*N]);
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} while (++j<eBands[i+1]);
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if (maxval > 0)
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{
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int shift = celt_ilog2(maxval)-10;
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j=eBands[i]; do {
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sum = MAC16_16(sum, EXTRACT16(VSHR32(X[j+c*N],shift)),
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EXTRACT16(VSHR32(X[j+c*N],shift)));
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} while (++j<eBands[i+1]);
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/* We're adding one here to make damn sure we never end up with a pitch vector that's
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larger than unity norm */
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bank[i+c*m->nbEBands] = EPSILON+VSHR32(EXTEND32(celt_sqrt(sum)),-shift);
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} else {
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bank[i+c*m->nbEBands] = EPSILON;
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}
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/*printf ("%f ", bank[i+c*m->nbEBands]);*/
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}
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}
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/*printf ("\n");*/
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}
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/* Normalise each band such that the energy is one. */
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void normalise_bands(const CELTMode *m, const celt_sig_t * restrict freq, celt_norm_t * restrict X, const celt_ener_t *bank)
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{
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int i, c, N;
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const celt_int16_t *eBands = m->eBands;
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const int C = CHANNELS(m);
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N = FRAMESIZE(m);
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for (c=0;c<C;c++)
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{
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i=0; do {
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celt_word16_t g;
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int j,shift;
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celt_word16_t E;
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shift = celt_zlog2(bank[i+c*m->nbEBands])-13;
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E = VSHR32(bank[i+c*m->nbEBands], shift);
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g = EXTRACT16(celt_rcp(SHL32(E,3)));
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j=eBands[i]; do {
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X[j*C+c] = MULT16_16_Q15(VSHR32(freq[j+c*N],shift-1),g);
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} while (++j<eBands[i+1]);
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} while (++i<m->nbEBands);
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}
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}
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#else /* FIXED_POINT */
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/* Compute the amplitude (sqrt energy) in each of the bands */
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void compute_band_energies(const CELTMode *m, const celt_sig_t *X, celt_ener_t *bank)
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{
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int i, c, N;
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const celt_int16_t *eBands = m->eBands;
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const int C = CHANNELS(m);
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N = FRAMESIZE(m);
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for (c=0;c<C;c++)
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{
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for (i=0;i<m->nbEBands;i++)
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{
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int j;
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celt_word32_t sum = 1e-10;
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for (j=eBands[i];j<eBands[i+1];j++)
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sum += X[j+c*N]*X[j+c*N];
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bank[i+c*m->nbEBands] = sqrt(sum);
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/*printf ("%f ", bank[i+c*m->nbEBands]);*/
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}
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}
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/*printf ("\n");*/
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}
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#ifdef EXP_PSY
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void compute_noise_energies(const CELTMode *m, const celt_sig_t *X, const celt_word16_t *tonality, celt_ener_t *bank)
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{
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int i, c, N;
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const celt_int16_t *eBands = m->eBands;
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const int C = CHANNELS(m);
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N = FRAMESIZE(m);
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for (c=0;c<C;c++)
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{
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for (i=0;i<m->nbEBands;i++)
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{
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int j;
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celt_word32_t sum = 1e-10;
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for (j=eBands[i];j<eBands[i+1];j++)
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sum += X[j*C+c]*X[j+c*N]*tonality[j];
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bank[i+c*m->nbEBands] = sqrt(sum);
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/*printf ("%f ", bank[i+c*m->nbEBands]);*/
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}
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}
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/*printf ("\n");*/
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}
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#endif
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/* Normalise each band such that the energy is one. */
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void normalise_bands(const CELTMode *m, const celt_sig_t * restrict freq, celt_norm_t * restrict X, const celt_ener_t *bank)
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{
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int i, c, N;
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const celt_int16_t *eBands = m->eBands;
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const int C = CHANNELS(m);
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N = FRAMESIZE(m);
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for (c=0;c<C;c++)
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{
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for (i=0;i<m->nbEBands;i++)
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{
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int j;
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celt_word16_t g = 1.f/(1e-10+bank[i+c*m->nbEBands]);
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for (j=eBands[i];j<eBands[i+1];j++)
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X[j*C+c] = freq[j+c*N]*g;
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}
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}
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}
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#endif /* FIXED_POINT */
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#ifndef DISABLE_STEREO
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void renormalise_bands(const CELTMode *m, celt_norm_t * restrict X)
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{
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int i, c;
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const celt_int16_t *eBands = m->eBands;
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const int C = CHANNELS(m);
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for (c=0;c<C;c++)
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{
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i=0; do {
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renormalise_vector(X+C*eBands[i]+c, QCONST16(0.70711f, 15), eBands[i+1]-eBands[i], C);
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} while (++i<m->nbEBands);
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}
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}
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#endif /* DISABLE_STEREO */
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/* De-normalise the energy to produce the synthesis from the unit-energy bands */
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void denormalise_bands(const CELTMode *m, const celt_norm_t * restrict X, celt_sig_t * restrict freq, const celt_ener_t *bank)
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{
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int i, c, N;
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const celt_int16_t *eBands = m->eBands;
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const int C = CHANNELS(m);
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N = FRAMESIZE(m);
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if (C>2)
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celt_fatal("denormalise_bands() not implemented for >2 channels");
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for (c=0;c<C;c++)
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{
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for (i=0;i<m->nbEBands;i++)
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{
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int j;
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celt_word32_t g = SHR32(bank[i+c*m->nbEBands],1);
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j=eBands[i]; do {
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freq[j+c*N] = SHL32(MULT16_32_Q15(X[j*C+c], g),2);
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} while (++j<eBands[i+1]);
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}
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for (i=eBands[m->nbEBands];i<eBands[m->nbEBands+1];i++)
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freq[i+c*N] = 0;
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}
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}
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/* Compute the best gain for each "pitch band" */
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int compute_pitch_gain(const CELTMode *m, const celt_norm_t *X, const celt_norm_t *P, celt_pgain_t *gains)
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{
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int i;
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int gain_sum = 0;
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const celt_int16_t *pBands = m->pBands;
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const int C = CHANNELS(m);
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for (i=0;i<m->nbPBands;i++)
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{
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celt_word32_t Sxy=0, Sxx=0;
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int j;
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/* We know we're not going to overflow because Sxx can't be more than 1 (Q28) */
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for (j=C*pBands[i];j<C*pBands[i+1];j++)
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{
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Sxy = MAC16_16(Sxy, X[j], P[j]);
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Sxx = MAC16_16(Sxx, X[j], X[j]);
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}
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Sxy = SHR32(Sxy,2);
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Sxx = SHR32(Sxx,2);
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/* No negative gain allowed */
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if (Sxy < 0)
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Sxy = 0;
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/* Not sure how that would happen, just making sure */
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if (Sxy > Sxx)
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Sxy = Sxx;
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/* We need to be a bit conservative (multiply gain by 0.9), otherwise the
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residual doesn't quantise well */
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Sxy = MULT16_32_Q15(QCONST16(.99f, 15), Sxy);
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/* gain = Sxy/Sxx */
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gains[i] = EXTRACT16(celt_div(Sxy,ADD32(SHR32(Sxx, PGAIN_SHIFT),EPSILON)));
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if (gains[i]>QCONST16(.5,15))
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gain_sum++;
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}
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return gain_sum > 5;
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}
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#ifndef DISABLE_STEREO
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static void stereo_band_mix(const CELTMode *m, celt_norm_t *X, const celt_ener_t *bank, int stereo_mode, int bandID, int dir)
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{
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int i = bandID;
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const celt_int16_t *eBands = m->eBands;
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const int C = CHANNELS(m);
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int j;
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celt_word16_t a1, a2;
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if (stereo_mode==0)
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{
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/* Do mid-side when not doing intensity stereo */
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a1 = QCONST16(.70711f,14);
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a2 = dir*QCONST16(.70711f,14);
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} else {
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celt_word16_t left, right;
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celt_word16_t norm;
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#ifdef FIXED_POINT
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int shift = celt_zlog2(MAX32(bank[i], bank[i+m->nbEBands]))-13;
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#endif
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left = VSHR32(bank[i],shift);
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right = VSHR32(bank[i+m->nbEBands],shift);
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norm = EPSILON + celt_sqrt(EPSILON+MULT16_16(left,left)+MULT16_16(right,right));
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a1 = DIV32_16(SHL32(EXTEND32(left),14),norm);
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a2 = dir*DIV32_16(SHL32(EXTEND32(right),14),norm);
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}
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for (j=eBands[i];j<eBands[i+1];j++)
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{
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celt_norm_t r, l;
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l = X[j*C];
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r = X[j*C+1];
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X[j*C] = MULT16_16_Q14(a1,l) + MULT16_16_Q14(a2,r);
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X[j*C+1] = MULT16_16_Q14(a1,r) - MULT16_16_Q14(a2,l);
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}
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}
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void interleave(celt_norm_t *x, int N)
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{
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int i;
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VARDECL(celt_norm_t, tmp);
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SAVE_STACK;
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ALLOC(tmp, N, celt_norm_t);
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for (i=0;i<N;i++)
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tmp[i] = x[i];
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for (i=0;i<N>>1;i++)
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{
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x[i<<1] = tmp[i];
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x[(i<<1)+1] = tmp[i+(N>>1)];
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}
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RESTORE_STACK;
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}
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void deinterleave(celt_norm_t *x, int N)
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{
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int i;
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VARDECL(celt_norm_t, tmp);
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SAVE_STACK;
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ALLOC(tmp, N, celt_norm_t);
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for (i=0;i<N;i++)
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tmp[i] = x[i];
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for (i=0;i<N>>1;i++)
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{
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x[i] = tmp[i<<1];
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x[i+(N>>1)] = tmp[(i<<1)+1];
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}
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RESTORE_STACK;
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}
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#endif /* DISABLE_STEREO */
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int folding_decision(const CELTMode *m, celt_norm_t *X, celt_word16_t *average, int *last_decision)
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{
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int i;
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int NR=0;
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celt_word32_t ratio = EPSILON;
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const celt_int16_t * restrict eBands = m->eBands;
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for (i=0;i<m->nbEBands;i++)
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{
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int j, N;
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int max_i=0;
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celt_word16_t max_val=EPSILON;
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celt_word32_t floor_ener=EPSILON;
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celt_norm_t * restrict x = X+eBands[i];
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N = eBands[i+1]-eBands[i];
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for (j=0;j<N;j++)
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{
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if (ABS16(x[j])>max_val)
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{
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max_val = ABS16(x[j]);
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max_i = j;
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}
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}
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#if 0
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for (j=0;j<N;j++)
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{
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if (abs(j-max_i)>2)
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floor_ener += x[j]*x[j];
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}
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#else
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floor_ener = QCONST32(1.,28)-MULT16_16(max_val,max_val);
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if (max_i < N-1)
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floor_ener -= MULT16_16(x[max_i+1], x[max_i+1]);
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if (max_i < N-2)
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floor_ener -= MULT16_16(x[max_i+2], x[max_i+2]);
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if (max_i > 0)
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floor_ener -= MULT16_16(x[max_i-1], x[max_i-1]);
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if (max_i > 1)
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floor_ener -= MULT16_16(x[max_i-2], x[max_i-2]);
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floor_ener = MAX32(floor_ener, EPSILON);
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#endif
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if (N>7 && eBands[i] >= m->pitchEnd)
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{
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celt_word16_t r;
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celt_word16_t den = celt_sqrt(floor_ener);
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den = MAX32(QCONST16(.02, 15), den);
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r = DIV32_16(SHL32(EXTEND32(max_val),8),den);
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ratio = ADD32(ratio, EXTEND32(r));
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NR++;
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}
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}
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if (NR>0)
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ratio = DIV32_16(ratio, NR);
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ratio = ADD32(HALF32(ratio), HALF32(*average));
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if (!*last_decision)
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{
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*last_decision = (ratio < QCONST16(1.8,8));
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} else {
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*last_decision = (ratio < QCONST16(3.,8));
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}
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*average = EXTRACT16(ratio);
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return *last_decision;
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}
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/* Quantisation of the residual */
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void quant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, celt_mask_t *W, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int shortBlocks, int fold, int total_bits, ec_enc *enc)
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{
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int i, j, remaining_bits, balance;
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const celt_int16_t * restrict eBands = m->eBands;
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celt_norm_t * restrict norm;
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VARDECL(celt_norm_t, _norm); const celt_int16_t *pBands = m->pBands;
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int pband=-1;
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int B;
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SAVE_STACK;
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B = shortBlocks ? m->nbShortMdcts : 1;
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ALLOC(_norm, eBands[m->nbEBands+1], celt_norm_t);
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norm = _norm;
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balance = 0;
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for (i=0;i<m->nbEBands;i++)
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{
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int tell;
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int N;
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int q;
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celt_word16_t n;
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const celt_int16_t * const *BPbits;
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int curr_balance, curr_bits;
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N = eBands[i+1]-eBands[i];
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BPbits = m->bits;
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tell = (int)ec_enc_tell(enc, 4);
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if (i != 0)
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balance -= tell;
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remaining_bits = (total_bits<<BITRES)-tell-1;
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curr_balance = (m->nbEBands-i);
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if (curr_balance > 3)
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curr_balance = 3;
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curr_balance = balance / curr_balance;
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q = bits2pulses(m, BPbits[i], N, pulses[i]+curr_balance);
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curr_bits = pulses2bits(BPbits[i], N, q);
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remaining_bits -= curr_bits;
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while (remaining_bits < 0 && q > 0)
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{
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remaining_bits += curr_bits;
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q--;
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curr_bits = pulses2bits(BPbits[i], N, q);
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remaining_bits -= curr_bits;
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}
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balance += pulses[i] + tell;
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n = SHL16(celt_sqrt(eBands[i+1]-eBands[i]),11);
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/* If pitch is in use and this eBand begins a pitch band, encode the pitch gain flag */
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if (pitch_used && eBands[i]< m->pitchEnd && eBands[i] == pBands[pband+1])
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{
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int enabled = 1;
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|
pband++;
|
|
if (remaining_bits >= 1<<BITRES) {
|
|
enabled = pgains[pband] > QCONST16(.5,15);
|
|
ec_enc_bits(enc, enabled, 1);
|
|
balance += 1<<BITRES;
|
|
}
|
|
if (enabled)
|
|
pgains[pband] = QCONST16(.9,15);
|
|
else
|
|
pgains[pband] = 0;
|
|
}
|
|
|
|
/* If pitch isn't available, use intra-frame prediction */
|
|
if ((eBands[i] >= m->pitchEnd && fold) || q<=0)
|
|
{
|
|
intra_fold(m, X+eBands[i], eBands[i+1]-eBands[i], &q, norm, P+eBands[i], eBands[i], B);
|
|
} else if (pitch_used && eBands[i] < m->pitchEnd) {
|
|
for (j=eBands[i];j<eBands[i+1];j++)
|
|
P[j] = MULT16_16_Q15(pgains[pband], P[j]);
|
|
} else {
|
|
for (j=eBands[i];j<eBands[i+1];j++)
|
|
P[j] = 0;
|
|
}
|
|
|
|
if (q > 0)
|
|
{
|
|
alg_quant(X+eBands[i], W+eBands[i], eBands[i+1]-eBands[i], q, P+eBands[i], enc);
|
|
} else {
|
|
for (j=eBands[i];j<eBands[i+1];j++)
|
|
X[j] = P[j];
|
|
}
|
|
for (j=eBands[i];j<eBands[i+1];j++)
|
|
norm[j] = MULT16_16_Q15(n,X[j]);
|
|
}
|
|
RESTORE_STACK;
|
|
}
|
|
|
|
#ifndef DISABLE_STEREO
|
|
|
|
void quant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, celt_mask_t *W, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int shortBlocks, int fold, int total_bits, ec_enc *enc)
|
|
{
|
|
int i, j, remaining_bits, balance;
|
|
const celt_int16_t * restrict eBands = m->eBands;
|
|
celt_norm_t * restrict norm;
|
|
VARDECL(celt_norm_t, _norm);
|
|
const int C = CHANNELS(m);
|
|
const celt_int16_t *pBands = m->pBands;
|
|
int pband=-1;
|
|
int B;
|
|
celt_word16_t mid, side;
|
|
SAVE_STACK;
|
|
|
|
B = shortBlocks ? m->nbShortMdcts : 1;
|
|
ALLOC(_norm, C*eBands[m->nbEBands+1], celt_norm_t);
|
|
norm = _norm;
|
|
|
|
balance = 0;
|
|
for (i=0;i<m->nbEBands;i++)
|
|
{
|
|
int c;
|
|
int tell;
|
|
int q1, q2;
|
|
celt_word16_t n;
|
|
const celt_int16_t * const *BPbits;
|
|
int b, qb;
|
|
int N;
|
|
int curr_balance, curr_bits;
|
|
int imid, iside, itheta;
|
|
int mbits, sbits, delta;
|
|
int qalloc;
|
|
|
|
BPbits = m->bits;
|
|
|
|
N = eBands[i+1]-eBands[i];
|
|
tell = (int)ec_enc_tell(enc, 4);
|
|
if (i != 0)
|
|
balance -= tell;
|
|
remaining_bits = (total_bits<<BITRES)-tell-1;
|
|
curr_balance = (m->nbEBands-i);
|
|
if (curr_balance > 3)
|
|
curr_balance = 3;
|
|
curr_balance = balance / curr_balance;
|
|
b = IMIN(remaining_bits+1,pulses[i]+curr_balance);
|
|
if (b<0)
|
|
b = 0;
|
|
|
|
qb = (b-2*(N-1)*(40-log2_frac(N,4)))/(32*(N-1));
|
|
if (qb > (b>>BITRES)-1)
|
|
qb = (b>>BITRES)-1;
|
|
if (qb<0)
|
|
qb = 0;
|
|
if (qb>14)
|
|
qb = 14;
|
|
|
|
stereo_band_mix(m, X, bandE, qb==0, i, 1);
|
|
|
|
mid = renormalise_vector(X+C*eBands[i], Q15ONE, N, C);
|
|
side = renormalise_vector(X+C*eBands[i]+1, Q15ONE, N, C);
|
|
#ifdef FIXED_POINT
|
|
itheta = MULT16_16_Q15(QCONST16(0.63662,15),celt_atan2p(side, mid));
|
|
#else
|
|
itheta = floor(.5+16384*0.63662*atan2(side,mid));
|
|
#endif
|
|
qalloc = log2_frac((1<<qb)+1,4);
|
|
if (qb==0)
|
|
{
|
|
itheta=0;
|
|
} else {
|
|
int shift;
|
|
shift = 14-qb;
|
|
itheta = (itheta+(1<<shift>>1))>>shift;
|
|
ec_enc_uint(enc, itheta, (1<<qb)+1);
|
|
itheta <<= shift;
|
|
}
|
|
if (itheta == 0)
|
|
{
|
|
imid = 32767;
|
|
iside = 0;
|
|
delta = -10000;
|
|
} else if (itheta == 16384)
|
|
{
|
|
imid = 0;
|
|
iside = 32767;
|
|
delta = 10000;
|
|
} else {
|
|
imid = bitexact_cos(itheta);
|
|
iside = bitexact_cos(16384-itheta);
|
|
delta = (N-1)*(log2_frac(iside,6)-log2_frac(imid,6))>>2;
|
|
}
|
|
mbits = (b-qalloc/2-delta)/2;
|
|
if (mbits > b-qalloc)
|
|
mbits = b-qalloc;
|
|
if (mbits<0)
|
|
mbits=0;
|
|
sbits = b-qalloc-mbits;
|
|
q1 = bits2pulses(m, BPbits[i], N, mbits);
|
|
q2 = bits2pulses(m, BPbits[i], N, sbits);
|
|
curr_bits = pulses2bits(BPbits[i], N, q1)+pulses2bits(BPbits[i], N, q2)+qalloc;
|
|
remaining_bits -= curr_bits;
|
|
while (remaining_bits < 0 && (q1 > 0 || q2 > 0))
|
|
{
|
|
remaining_bits += curr_bits;
|
|
if (q1>q2)
|
|
{
|
|
q1--;
|
|
curr_bits = pulses2bits(BPbits[i], N, q1)+pulses2bits(BPbits[i], N, q2)+qalloc;
|
|
} else {
|
|
q2--;
|
|
curr_bits = pulses2bits(BPbits[i], N, q1)+pulses2bits(BPbits[i], N, q2)+qalloc;
|
|
}
|
|
remaining_bits -= curr_bits;
|
|
}
|
|
balance += pulses[i] + tell;
|
|
|
|
n = SHL16(celt_sqrt((eBands[i+1]-eBands[i])),11);
|
|
|
|
/* If pitch is in use and this eBand begins a pitch band, encode the pitch gain flag */
|
|
if (pitch_used && eBands[i]< m->pitchEnd && eBands[i] == pBands[pband+1])
|
|
{
|
|
int enabled = 1;
|
|
pband++;
|
|
if (remaining_bits >= 1<<BITRES) {
|
|
enabled = pgains[pband] > QCONST16(.5,15);
|
|
ec_enc_bits(enc, enabled, 1);
|
|
balance += 1<<BITRES;
|
|
}
|
|
if (enabled)
|
|
pgains[pband] = QCONST16(.9,15);
|
|
else
|
|
pgains[pband] = 0;
|
|
}
|
|
|
|
|
|
/* If pitch isn't available, use intra-frame prediction */
|
|
if ((eBands[i] >= m->pitchEnd && fold) || (q1+q2)<=0)
|
|
{
|
|
int K[2] = {q1, q2};
|
|
intra_fold(m, X+C*eBands[i], eBands[i+1]-eBands[i], K, norm, P+C*eBands[i], eBands[i], B);
|
|
deinterleave(P+C*eBands[i], C*N);
|
|
} else if (pitch_used && eBands[i] < m->pitchEnd) {
|
|
stereo_band_mix(m, P, bandE, qb==0, i, 1);
|
|
renormalise_vector(P+C*eBands[i], Q15ONE, N, C);
|
|
renormalise_vector(P+C*eBands[i]+1, Q15ONE, N, C);
|
|
deinterleave(P+C*eBands[i], C*N);
|
|
for (j=C*eBands[i];j<C*eBands[i+1];j++)
|
|
P[j] = MULT16_16_Q15(pgains[pband], P[j]);
|
|
} else {
|
|
for (j=C*eBands[i];j<C*eBands[i+1];j++)
|
|
P[j] = 0;
|
|
}
|
|
deinterleave(X+C*eBands[i], C*N);
|
|
if (q1 > 0)
|
|
alg_quant(X+C*eBands[i], W+C*eBands[i], N, q1, P+C*eBands[i], enc);
|
|
else
|
|
for (j=C*eBands[i];j<C*eBands[i]+N;j++)
|
|
X[j] = P[j];
|
|
if (q2 > 0)
|
|
alg_quant(X+C*eBands[i]+N, W+C*eBands[i], N, q2, P+C*eBands[i]+N, enc);
|
|
else
|
|
for (j=C*eBands[i]+N;j<C*eBands[i+1];j++)
|
|
X[j] = 0;
|
|
|
|
#ifdef FIXED_POINT
|
|
mid = imid;
|
|
side = iside;
|
|
#else
|
|
mid = (1./32768)*imid;
|
|
side = (1./32768)*iside;
|
|
#endif
|
|
for (c=0;c<C;c++)
|
|
for (j=0;j<N;j++)
|
|
norm[C*(eBands[i]+j)+c] = MULT16_16_Q15(n,X[C*eBands[i]+c*N+j]);
|
|
|
|
for (j=0;j<N;j++)
|
|
X[C*eBands[i]+j] = MULT16_16_Q15(X[C*eBands[i]+j], mid);
|
|
for (j=0;j<N;j++)
|
|
X[C*eBands[i]+N+j] = MULT16_16_Q15(X[C*eBands[i]+N+j], side);
|
|
|
|
interleave(X+C*eBands[i], C*N);
|
|
|
|
|
|
stereo_band_mix(m, X, bandE, 0, i, -1);
|
|
renormalise_vector(X+C*eBands[i], Q15ONE, N, C);
|
|
renormalise_vector(X+C*eBands[i]+1, Q15ONE, N, C);
|
|
}
|
|
RESTORE_STACK;
|
|
}
|
|
#endif /* DISABLE_STEREO */
|
|
|
|
/* Decoding of the residual */
|
|
void unquant_bands(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int shortBlocks, int fold, int total_bits, ec_dec *dec)
|
|
{
|
|
int i, j, remaining_bits, balance;
|
|
const celt_int16_t * restrict eBands = m->eBands;
|
|
celt_norm_t * restrict norm;
|
|
VARDECL(celt_norm_t, _norm);
|
|
const celt_int16_t *pBands = m->pBands;
|
|
int pband=-1;
|
|
int B;
|
|
SAVE_STACK;
|
|
|
|
B = shortBlocks ? m->nbShortMdcts : 1;
|
|
ALLOC(_norm, eBands[m->nbEBands+1], celt_norm_t);
|
|
norm = _norm;
|
|
|
|
balance = 0;
|
|
for (i=0;i<m->nbEBands;i++)
|
|
{
|
|
int tell;
|
|
int N;
|
|
int q;
|
|
celt_word16_t n;
|
|
const celt_int16_t * const *BPbits;
|
|
|
|
int curr_balance, curr_bits;
|
|
|
|
N = eBands[i+1]-eBands[i];
|
|
BPbits = m->bits;
|
|
|
|
tell = (int)ec_dec_tell(dec, 4);
|
|
if (i != 0)
|
|
balance -= tell;
|
|
remaining_bits = (total_bits<<BITRES)-tell-1;
|
|
curr_balance = (m->nbEBands-i);
|
|
if (curr_balance > 3)
|
|
curr_balance = 3;
|
|
curr_balance = balance / curr_balance;
|
|
q = bits2pulses(m, BPbits[i], N, pulses[i]+curr_balance);
|
|
curr_bits = pulses2bits(BPbits[i], N, q);
|
|
remaining_bits -= curr_bits;
|
|
while (remaining_bits < 0 && q > 0)
|
|
{
|
|
remaining_bits += curr_bits;
|
|
q--;
|
|
curr_bits = pulses2bits(BPbits[i], N, q);
|
|
remaining_bits -= curr_bits;
|
|
}
|
|
balance += pulses[i] + tell;
|
|
|
|
n = SHL16(celt_sqrt(eBands[i+1]-eBands[i]),11);
|
|
|
|
/* If pitch is in use and this eBand begins a pitch band, encode the pitch gain flag */
|
|
if (pitch_used && eBands[i] < m->pitchEnd && eBands[i] == pBands[pband+1])
|
|
{
|
|
int enabled = 1;
|
|
pband++;
|
|
if (remaining_bits >= 1<<BITRES) {
|
|
enabled = ec_dec_bits(dec, 1);
|
|
balance += 1<<BITRES;
|
|
}
|
|
if (enabled)
|
|
pgains[pband] = QCONST16(.9,15);
|
|
else
|
|
pgains[pband] = 0;
|
|
}
|
|
|
|
/* If pitch isn't available, use intra-frame prediction */
|
|
if ((eBands[i] >= m->pitchEnd && fold) || q<=0)
|
|
{
|
|
intra_fold(m, X+eBands[i], eBands[i+1]-eBands[i], &q, norm, P+eBands[i], eBands[i], B);
|
|
} else if (pitch_used && eBands[i] < m->pitchEnd) {
|
|
for (j=eBands[i];j<eBands[i+1];j++)
|
|
P[j] = MULT16_16_Q15(pgains[pband], P[j]);
|
|
} else {
|
|
for (j=eBands[i];j<eBands[i+1];j++)
|
|
P[j] = 0;
|
|
}
|
|
|
|
if (q > 0)
|
|
{
|
|
alg_unquant(X+eBands[i], eBands[i+1]-eBands[i], q, P+eBands[i], dec);
|
|
} else {
|
|
for (j=eBands[i];j<eBands[i+1];j++)
|
|
X[j] = P[j];
|
|
}
|
|
for (j=eBands[i];j<eBands[i+1];j++)
|
|
norm[j] = MULT16_16_Q15(n,X[j]);
|
|
}
|
|
RESTORE_STACK;
|
|
}
|
|
|
|
#ifndef DISABLE_STEREO
|
|
|
|
void unquant_bands_stereo(const CELTMode *m, celt_norm_t * restrict X, celt_norm_t *P, int pitch_used, celt_pgain_t *pgains, const celt_ener_t *bandE, int *pulses, int shortBlocks, int fold, int total_bits, ec_dec *dec)
|
|
{
|
|
int i, j, remaining_bits, balance;
|
|
const celt_int16_t * restrict eBands = m->eBands;
|
|
celt_norm_t * restrict norm;
|
|
VARDECL(celt_norm_t, _norm);
|
|
const int C = CHANNELS(m);
|
|
const celt_int16_t *pBands = m->pBands;
|
|
int pband=-1;
|
|
int B;
|
|
celt_word16_t mid, side;
|
|
SAVE_STACK;
|
|
|
|
B = shortBlocks ? m->nbShortMdcts : 1;
|
|
ALLOC(_norm, C*eBands[m->nbEBands+1], celt_norm_t);
|
|
norm = _norm;
|
|
|
|
balance = 0;
|
|
for (i=0;i<m->nbEBands;i++)
|
|
{
|
|
int c;
|
|
int tell;
|
|
int q1, q2;
|
|
celt_word16_t n;
|
|
const celt_int16_t * const *BPbits;
|
|
int b, qb;
|
|
int N;
|
|
int curr_balance, curr_bits;
|
|
int imid, iside, itheta;
|
|
int mbits, sbits, delta;
|
|
int qalloc;
|
|
|
|
BPbits = m->bits;
|
|
|
|
N = eBands[i+1]-eBands[i];
|
|
tell = (int)ec_dec_tell(dec, 4);
|
|
if (i != 0)
|
|
balance -= tell;
|
|
remaining_bits = (total_bits<<BITRES)-tell-1;
|
|
curr_balance = (m->nbEBands-i);
|
|
if (curr_balance > 3)
|
|
curr_balance = 3;
|
|
curr_balance = balance / curr_balance;
|
|
b = IMIN(remaining_bits+1,pulses[i]+curr_balance);
|
|
if (b<0)
|
|
b = 0;
|
|
|
|
qb = (b-2*(N-1)*(40-log2_frac(N,4)))/(32*(N-1));
|
|
if (qb > (b>>BITRES)-1)
|
|
qb = (b>>BITRES)-1;
|
|
if (qb>14)
|
|
qb = 14;
|
|
if (qb<0)
|
|
qb = 0;
|
|
qalloc = log2_frac((1<<qb)+1,4);
|
|
if (qb==0)
|
|
{
|
|
itheta=0;
|
|
} else {
|
|
int shift;
|
|
shift = 14-qb;
|
|
itheta = ec_dec_uint(dec, (1<<qb)+1);
|
|
itheta <<= shift;
|
|
}
|
|
if (itheta == 0)
|
|
{
|
|
imid = 32767;
|
|
iside = 0;
|
|
delta = -10000;
|
|
} else if (itheta == 16384)
|
|
{
|
|
imid = 0;
|
|
iside = 32767;
|
|
delta = 10000;
|
|
} else {
|
|
imid = bitexact_cos(itheta);
|
|
iside = bitexact_cos(16384-itheta);
|
|
delta = (N-1)*(log2_frac(iside,6)-log2_frac(imid,6))>>2;
|
|
}
|
|
mbits = (b-qalloc/2-delta)/2;
|
|
if (mbits > b-qalloc)
|
|
mbits = b-qalloc;
|
|
if (mbits<0)
|
|
mbits=0;
|
|
sbits = b-qalloc-mbits;
|
|
q1 = bits2pulses(m, BPbits[i], N, mbits);
|
|
q2 = bits2pulses(m, BPbits[i], N, sbits);
|
|
curr_bits = pulses2bits(BPbits[i], N, q1)+pulses2bits(BPbits[i], N, q2)+qalloc;
|
|
remaining_bits -= curr_bits;
|
|
while (remaining_bits < 0 && (q1 > 0 || q2 > 0))
|
|
{
|
|
remaining_bits += curr_bits;
|
|
if (q1>q2)
|
|
{
|
|
q1--;
|
|
curr_bits = pulses2bits(BPbits[i], N, q1)+pulses2bits(BPbits[i], N, q2)+qalloc;
|
|
} else {
|
|
q2--;
|
|
curr_bits = pulses2bits(BPbits[i], N, q1)+pulses2bits(BPbits[i], N, q2)+qalloc;
|
|
}
|
|
remaining_bits -= curr_bits;
|
|
}
|
|
balance += pulses[i] + tell;
|
|
|
|
n = SHL16(celt_sqrt((eBands[i+1]-eBands[i])),11);
|
|
|
|
/* If pitch is in use and this eBand begins a pitch band, encode the pitch gain flag */
|
|
if (pitch_used && eBands[i]< m->pitchEnd && eBands[i] == pBands[pband+1])
|
|
{
|
|
int enabled = 1;
|
|
pband++;
|
|
if (remaining_bits >= 1<<BITRES) {
|
|
enabled = ec_dec_bits(dec, 1);
|
|
balance += 1<<BITRES;
|
|
}
|
|
if (enabled)
|
|
pgains[pband] = QCONST16(.9,15);
|
|
else
|
|
pgains[pband] = 0;
|
|
}
|
|
|
|
/* If pitch isn't available, use intra-frame prediction */
|
|
if ((eBands[i] >= m->pitchEnd && fold) || (q1+q2)<=0)
|
|
{
|
|
int K[2] = {q1, q2};
|
|
intra_fold(m, X+C*eBands[i], eBands[i+1]-eBands[i], K, norm, P+C*eBands[i], eBands[i], B);
|
|
deinterleave(P+C*eBands[i], C*N);
|
|
} else if (pitch_used && eBands[i] < m->pitchEnd) {
|
|
stereo_band_mix(m, P, bandE, qb==0, i, 1);
|
|
renormalise_vector(P+C*eBands[i], Q15ONE, N, C);
|
|
renormalise_vector(P+C*eBands[i]+1, Q15ONE, N, C);
|
|
deinterleave(P+C*eBands[i], C*N);
|
|
for (j=C*eBands[i];j<C*eBands[i+1];j++)
|
|
P[j] = MULT16_16_Q15(pgains[pband], P[j]);
|
|
} else {
|
|
for (j=C*eBands[i];j<C*eBands[i+1];j++)
|
|
P[j] = 0;
|
|
}
|
|
deinterleave(X+C*eBands[i], C*N);
|
|
if (q1 > 0)
|
|
alg_unquant(X+C*eBands[i], N, q1, P+C*eBands[i], dec);
|
|
else
|
|
for (j=C*eBands[i];j<C*eBands[i]+N;j++)
|
|
X[j] = P[j];
|
|
if (q2 > 0)
|
|
alg_unquant(X+C*eBands[i]+N, N, q2, P+C*eBands[i]+N, dec);
|
|
else
|
|
for (j=C*eBands[i]+N;j<C*eBands[i+1];j++)
|
|
X[j] = 0;
|
|
/*orthogonalize(X+C*eBands[i], X+C*eBands[i]+N, N);*/
|
|
|
|
#ifdef FIXED_POINT
|
|
mid = imid;
|
|
side = iside;
|
|
#else
|
|
mid = (1./32768)*imid;
|
|
side = (1./32768)*iside;
|
|
#endif
|
|
for (c=0;c<C;c++)
|
|
for (j=0;j<N;j++)
|
|
norm[C*(eBands[i]+j)+c] = MULT16_16_Q15(n,X[C*eBands[i]+c*N+j]);
|
|
|
|
for (j=0;j<N;j++)
|
|
X[C*eBands[i]+j] = MULT16_16_Q15(X[C*eBands[i]+j], mid);
|
|
for (j=0;j<N;j++)
|
|
X[C*eBands[i]+N+j] = MULT16_16_Q15(X[C*eBands[i]+N+j], side);
|
|
|
|
interleave(X+C*eBands[i], C*N);
|
|
|
|
stereo_band_mix(m, X, bandE, 0, i, -1);
|
|
renormalise_vector(X+C*eBands[i], Q15ONE, N, C);
|
|
renormalise_vector(X+C*eBands[i]+1, Q15ONE, N, C);
|
|
}
|
|
RESTORE_STACK;
|
|
}
|
|
|
|
#endif /* DISABLE_STEREO */
|