580b307fd7
Sync opus codec to upstream commit
02fed471a4568852d6618e041c4f2af0d7730ee2 (August 30 2013)
This brings in a lot of optimizations but also makes the diff
between our codec and the upstream much smaller as most of our
optimizations have been upstreamed or supeceded.
Speedups across the board for CELT mode files:
64kbps 128kbps
H300 9.82MHz 15.48MHz
c200 4.86MHz 9.63MHz
fuze v1 10.32MHz 15.92MHz
For the silk mode test file (16kbps) arm targets get a speedup
of about 2MHz while the H300 is 7.8MHz slower, likely because it's
now using the pseudostack more rather than the real stack which
is in iram. Patches to get around that are upcomming.
Change-Id: Ifecf963e461c51ac42e09dac1e91bc4bc3b12fa3
438 lines
14 KiB
C
438 lines
14 KiB
C
/* Copyright (c) 2007-2008 CSIRO
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Copyright (c) 2007-2009 Xiph.Org Foundation
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Copyright (c) 2008 Gregory Maxwell
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Written by Jean-Marc Valin and 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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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 COPYRIGHT OWNER
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OR 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 "celt.h"
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#include "modes.h"
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#include "rate.h"
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#include "os_support.h"
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#include "stack_alloc.h"
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#include "quant_bands.h"
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static const opus_int16 eband5ms[] = {
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/*0 200 400 600 800 1k 1.2 1.4 1.6 2k 2.4 2.8 3.2 4k 4.8 5.6 6.8 8k 9.6 12k 15.6 */
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0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 24, 28, 34, 40, 48, 60, 78, 100
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};
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/* Alternate tuning (partially derived from Vorbis) */
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#define BITALLOC_SIZE 11
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/* Bit allocation table in units of 1/32 bit/sample (0.1875 dB SNR) */
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static const unsigned char band_allocation[] = {
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/*0 200 400 600 800 1k 1.2 1.4 1.6 2k 2.4 2.8 3.2 4k 4.8 5.6 6.8 8k 9.6 12k 15.6 */
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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90, 80, 75, 69, 63, 56, 49, 40, 34, 29, 20, 18, 10, 0, 0, 0, 0, 0, 0, 0, 0,
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110,100, 90, 84, 78, 71, 65, 58, 51, 45, 39, 32, 26, 20, 12, 0, 0, 0, 0, 0, 0,
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118,110,103, 93, 86, 80, 75, 70, 65, 59, 53, 47, 40, 31, 23, 15, 4, 0, 0, 0, 0,
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126,119,112,104, 95, 89, 83, 78, 72, 66, 60, 54, 47, 39, 32, 25, 17, 12, 1, 0, 0,
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134,127,120,114,103, 97, 91, 85, 78, 72, 66, 60, 54, 47, 41, 35, 29, 23, 16, 10, 1,
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144,137,130,124,113,107,101, 95, 88, 82, 76, 70, 64, 57, 51, 45, 39, 33, 26, 15, 1,
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152,145,138,132,123,117,111,105, 98, 92, 86, 80, 74, 67, 61, 55, 49, 43, 36, 20, 1,
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162,155,148,142,133,127,121,115,108,102, 96, 90, 84, 77, 71, 65, 59, 53, 46, 30, 1,
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172,165,158,152,143,137,131,125,118,112,106,100, 94, 87, 81, 75, 69, 63, 56, 45, 20,
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200,200,200,200,200,200,200,200,198,193,188,183,178,173,168,163,158,153,148,129,104,
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};
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#ifndef CUSTOM_MODES_ONLY
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#ifdef FIXED_POINT
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#include "static_modes_fixed.h"
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#else
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#include "static_modes_float.h"
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#endif
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#endif /* CUSTOM_MODES_ONLY */
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#ifndef M_PI
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#define M_PI 3.141592653
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#endif
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#ifdef CUSTOM_MODES
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/* Defining 25 critical bands for the full 0-20 kHz audio bandwidth
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Taken from http://ccrma.stanford.edu/~jos/bbt/Bark_Frequency_Scale.html */
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#define BARK_BANDS 25
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static const opus_int16 bark_freq[BARK_BANDS+1] = {
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0, 100, 200, 300, 400,
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510, 630, 770, 920, 1080,
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1270, 1480, 1720, 2000, 2320,
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2700, 3150, 3700, 4400, 5300,
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6400, 7700, 9500, 12000, 15500,
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20000};
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static opus_int16 *compute_ebands(opus_int32 Fs, int frame_size, int res, int *nbEBands)
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{
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opus_int16 *eBands;
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int i, j, lin, low, high, nBark, offset=0;
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/* All modes that have 2.5 ms short blocks use the same definition */
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if (Fs == 400*(opus_int32)frame_size)
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{
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*nbEBands = sizeof(eband5ms)/sizeof(eband5ms[0])-1;
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eBands = opus_alloc(sizeof(opus_int16)*(*nbEBands+1));
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for (i=0;i<*nbEBands+1;i++)
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eBands[i] = eband5ms[i];
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return eBands;
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}
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/* Find the number of critical bands supported by our sampling rate */
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for (nBark=1;nBark<BARK_BANDS;nBark++)
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if (bark_freq[nBark+1]*2 >= Fs)
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break;
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/* Find where the linear part ends (i.e. where the spacing is more than min_width */
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for (lin=0;lin<nBark;lin++)
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if (bark_freq[lin+1]-bark_freq[lin] >= res)
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break;
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low = (bark_freq[lin]+res/2)/res;
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high = nBark-lin;
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*nbEBands = low+high;
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eBands = opus_alloc(sizeof(opus_int16)*(*nbEBands+2));
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if (eBands==NULL)
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return NULL;
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/* Linear spacing (min_width) */
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for (i=0;i<low;i++)
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eBands[i] = i;
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if (low>0)
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offset = eBands[low-1]*res - bark_freq[lin-1];
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/* Spacing follows critical bands */
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for (i=0;i<high;i++)
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{
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int target = bark_freq[lin+i];
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/* Round to an even value */
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eBands[i+low] = (target+offset/2+res)/(2*res)*2;
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offset = eBands[i+low]*res - target;
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}
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/* Enforce the minimum spacing at the boundary */
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for (i=0;i<*nbEBands;i++)
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if (eBands[i] < i)
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eBands[i] = i;
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/* Round to an even value */
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eBands[*nbEBands] = (bark_freq[nBark]+res)/(2*res)*2;
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if (eBands[*nbEBands] > frame_size)
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eBands[*nbEBands] = frame_size;
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for (i=1;i<*nbEBands-1;i++)
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{
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if (eBands[i+1]-eBands[i] < eBands[i]-eBands[i-1])
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{
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eBands[i] -= (2*eBands[i]-eBands[i-1]-eBands[i+1])/2;
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}
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}
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/* Remove any empty bands. */
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for (i=j=0;i<*nbEBands;i++)
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if(eBands[i+1]>eBands[j])
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eBands[++j]=eBands[i+1];
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*nbEBands=j;
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for (i=1;i<*nbEBands;i++)
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{
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/* Every band must be smaller than the last band. */
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celt_assert(eBands[i]-eBands[i-1]<=eBands[*nbEBands]-eBands[*nbEBands-1]);
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/* Each band must be no larger than twice the size of the previous one. */
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celt_assert(eBands[i+1]-eBands[i]<=2*(eBands[i]-eBands[i-1]));
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}
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return eBands;
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}
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static void compute_allocation_table(CELTMode *mode)
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{
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int i, j;
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unsigned char *allocVectors;
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int maxBands = sizeof(eband5ms)/sizeof(eband5ms[0])-1;
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mode->nbAllocVectors = BITALLOC_SIZE;
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allocVectors = opus_alloc(sizeof(unsigned char)*(BITALLOC_SIZE*mode->nbEBands));
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if (allocVectors==NULL)
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return;
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/* Check for standard mode */
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if (mode->Fs == 400*(opus_int32)mode->shortMdctSize)
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{
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for (i=0;i<BITALLOC_SIZE*mode->nbEBands;i++)
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allocVectors[i] = band_allocation[i];
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mode->allocVectors = allocVectors;
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return;
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}
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/* If not the standard mode, interpolate */
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/* Compute per-codec-band allocation from per-critical-band matrix */
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for (i=0;i<BITALLOC_SIZE;i++)
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{
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for (j=0;j<mode->nbEBands;j++)
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{
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int k;
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for (k=0;k<maxBands;k++)
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{
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if (400*(opus_int32)eband5ms[k] > mode->eBands[j]*(opus_int32)mode->Fs/mode->shortMdctSize)
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break;
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}
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if (k>maxBands-1)
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allocVectors[i*mode->nbEBands+j] = band_allocation[i*maxBands + maxBands-1];
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else {
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opus_int32 a0, a1;
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a1 = mode->eBands[j]*(opus_int32)mode->Fs/mode->shortMdctSize - 400*(opus_int32)eband5ms[k-1];
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a0 = 400*(opus_int32)eband5ms[k] - mode->eBands[j]*(opus_int32)mode->Fs/mode->shortMdctSize;
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allocVectors[i*mode->nbEBands+j] = (a0*band_allocation[i*maxBands+k-1]
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+ a1*band_allocation[i*maxBands+k])/(a0+a1);
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}
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}
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}
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/*printf ("\n");
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for (i=0;i<BITALLOC_SIZE;i++)
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{
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for (j=0;j<mode->nbEBands;j++)
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printf ("%d ", allocVectors[i*mode->nbEBands+j]);
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printf ("\n");
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}
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exit(0);*/
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mode->allocVectors = allocVectors;
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}
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#endif /* CUSTOM_MODES */
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CELTMode *opus_custom_mode_create(opus_int32 Fs, int frame_size, int *error)
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{
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int i;
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#ifdef CUSTOM_MODES
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CELTMode *mode=NULL;
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int res;
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opus_val16 *window;
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opus_int16 *logN;
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int LM;
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ALLOC_STACK;
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#if !defined(VAR_ARRAYS) && !defined(USE_ALLOCA)
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if (global_stack==NULL)
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goto failure;
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#endif
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#endif
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#ifndef CUSTOM_MODES_ONLY
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for (i=0;i<TOTAL_MODES;i++)
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{
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int j;
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for (j=0;j<4;j++)
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{
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if (Fs == static_mode_list[i]->Fs &&
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(frame_size<<j) == static_mode_list[i]->shortMdctSize*static_mode_list[i]->nbShortMdcts)
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{
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if (error)
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*error = OPUS_OK;
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return (CELTMode*)static_mode_list[i];
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}
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}
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}
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#endif /* CUSTOM_MODES_ONLY */
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#ifndef CUSTOM_MODES
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if (error)
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*error = OPUS_BAD_ARG;
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return NULL;
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#else
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/* The good thing here is that permutation of the arguments will automatically be invalid */
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if (Fs < 8000 || Fs > 96000)
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{
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if (error)
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*error = OPUS_BAD_ARG;
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return NULL;
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}
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if (frame_size < 40 || frame_size > 1024 || frame_size%2!=0)
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{
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if (error)
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*error = OPUS_BAD_ARG;
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return NULL;
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}
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/* Frames of less than 1ms are not supported. */
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if ((opus_int32)frame_size*1000 < Fs)
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{
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if (error)
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*error = OPUS_BAD_ARG;
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return NULL;
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}
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if ((opus_int32)frame_size*75 >= Fs && (frame_size%16)==0)
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{
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LM = 3;
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} else if ((opus_int32)frame_size*150 >= Fs && (frame_size%8)==0)
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{
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LM = 2;
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} else if ((opus_int32)frame_size*300 >= Fs && (frame_size%4)==0)
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{
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LM = 1;
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} else
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{
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LM = 0;
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}
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/* Shorts longer than 3.3ms are not supported. */
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if ((opus_int32)(frame_size>>LM)*300 > Fs)
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{
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if (error)
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*error = OPUS_BAD_ARG;
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return NULL;
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}
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mode = opus_alloc(sizeof(CELTMode));
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if (mode==NULL)
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goto failure;
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mode->Fs = Fs;
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/* Pre/de-emphasis depends on sampling rate. The "standard" pre-emphasis
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is defined as A(z) = 1 - 0.85*z^-1 at 48 kHz. Other rates should
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approximate that. */
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if(Fs < 12000) /* 8 kHz */
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{
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mode->preemph[0] = QCONST16(0.3500061035f, 15);
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mode->preemph[1] = -QCONST16(0.1799926758f, 15);
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mode->preemph[2] = QCONST16(0.2719968125f, SIG_SHIFT); /* exact 1/preemph[3] */
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mode->preemph[3] = QCONST16(3.6765136719f, 13);
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} else if(Fs < 24000) /* 16 kHz */
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{
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mode->preemph[0] = QCONST16(0.6000061035f, 15);
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mode->preemph[1] = -QCONST16(0.1799926758f, 15);
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mode->preemph[2] = QCONST16(0.4424998650f, SIG_SHIFT); /* exact 1/preemph[3] */
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mode->preemph[3] = QCONST16(2.2598876953f, 13);
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} else if(Fs < 40000) /* 32 kHz */
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{
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mode->preemph[0] = QCONST16(0.7799987793f, 15);
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mode->preemph[1] = -QCONST16(0.1000061035f, 15);
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mode->preemph[2] = QCONST16(0.7499771125f, SIG_SHIFT); /* exact 1/preemph[3] */
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mode->preemph[3] = QCONST16(1.3333740234f, 13);
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} else /* 48 kHz */
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{
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mode->preemph[0] = QCONST16(0.8500061035f, 15);
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mode->preemph[1] = QCONST16(0.0f, 15);
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mode->preemph[2] = QCONST16(1.f, SIG_SHIFT);
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mode->preemph[3] = QCONST16(1.f, 13);
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}
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mode->maxLM = LM;
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mode->nbShortMdcts = 1<<LM;
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mode->shortMdctSize = frame_size/mode->nbShortMdcts;
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res = (mode->Fs+mode->shortMdctSize)/(2*mode->shortMdctSize);
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mode->eBands = compute_ebands(Fs, mode->shortMdctSize, res, &mode->nbEBands);
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if (mode->eBands==NULL)
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goto failure;
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#if !defined(SMALL_FOOTPRINT)
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/* Make sure we don't allocate a band larger than our PVQ table.
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208 should be enough, but let's be paranoid. */
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if ((mode->eBands[mode->nbEBands] - mode->eBands[mode->nbEBands-1])<<LM >
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208) {
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goto failure;
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}
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#endif
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mode->effEBands = mode->nbEBands;
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while (mode->eBands[mode->effEBands] > mode->shortMdctSize)
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mode->effEBands--;
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/* Overlap must be divisible by 4 */
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mode->overlap = ((mode->shortMdctSize>>2)<<2);
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compute_allocation_table(mode);
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if (mode->allocVectors==NULL)
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goto failure;
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window = (opus_val16*)opus_alloc(mode->overlap*sizeof(opus_val16));
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if (window==NULL)
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goto failure;
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#ifndef FIXED_POINT
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for (i=0;i<mode->overlap;i++)
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window[i] = Q15ONE*sin(.5*M_PI* sin(.5*M_PI*(i+.5)/mode->overlap) * sin(.5*M_PI*(i+.5)/mode->overlap));
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#else
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for (i=0;i<mode->overlap;i++)
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window[i] = MIN32(32767,floor(.5+32768.*sin(.5*M_PI* sin(.5*M_PI*(i+.5)/mode->overlap) * sin(.5*M_PI*(i+.5)/mode->overlap))));
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#endif
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mode->window = window;
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logN = (opus_int16*)opus_alloc(mode->nbEBands*sizeof(opus_int16));
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if (logN==NULL)
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goto failure;
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for (i=0;i<mode->nbEBands;i++)
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logN[i] = log2_frac(mode->eBands[i+1]-mode->eBands[i], BITRES);
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mode->logN = logN;
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compute_pulse_cache(mode, mode->maxLM);
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if (clt_mdct_init(&mode->mdct, 2*mode->shortMdctSize*mode->nbShortMdcts,
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mode->maxLM) == 0)
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goto failure;
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if (error)
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*error = OPUS_OK;
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return mode;
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failure:
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if (error)
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*error = OPUS_ALLOC_FAIL;
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if (mode!=NULL)
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opus_custom_mode_destroy(mode);
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return NULL;
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#endif /* !CUSTOM_MODES */
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}
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#ifdef CUSTOM_MODES
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void opus_custom_mode_destroy(CELTMode *mode)
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{
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if (mode == NULL)
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return;
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#ifndef CUSTOM_MODES_ONLY
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{
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int i;
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for (i=0;i<TOTAL_MODES;i++)
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{
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if (mode == static_mode_list[i])
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{
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return;
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}
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}
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}
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#endif /* CUSTOM_MODES_ONLY */
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opus_free((opus_int16*)mode->eBands);
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opus_free((opus_int16*)mode->allocVectors);
|
|
|
|
opus_free((opus_val16*)mode->window);
|
|
opus_free((opus_int16*)mode->logN);
|
|
|
|
opus_free((opus_int16*)mode->cache.index);
|
|
opus_free((unsigned char*)mode->cache.bits);
|
|
opus_free((unsigned char*)mode->cache.caps);
|
|
clt_mdct_clear(&mode->mdct);
|
|
|
|
opus_free((CELTMode *)mode);
|
|
}
|
|
#endif
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