diff options
Diffstat (limited to 'drivers/opus/celt/modes.c')
| -rw-r--r-- | drivers/opus/celt/modes.c | 439 |
1 files changed, 0 insertions, 439 deletions
diff --git a/drivers/opus/celt/modes.c b/drivers/opus/celt/modes.c deleted file mode 100644 index d628f1468b..0000000000 --- a/drivers/opus/celt/modes.c +++ /dev/null @@ -1,439 +0,0 @@ -/* Copyright (c) 2007-2008 CSIRO - Copyright (c) 2007-2009 Xiph.Org Foundation - Copyright (c) 2008 Gregory Maxwell - Written by Jean-Marc Valin and Gregory Maxwell */ -/* - 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. -*/ -#include "opus/opus_config.h" - -#include "opus/celt/celt.h" -#include "opus/celt/modes.h" -#include "opus/celt/rate.h" -#include "opus/celt/os_support.h" -#include "opus/celt/stack_alloc.h" -#include "opus/celt/quant_bands.h" -#include "opus/celt/cpu_support.h" - -static const opus_int16 eband5ms[] = { -/*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 */ - 0, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 16, 20, 24, 28, 34, 40, 48, 60, 78, 100 -}; - -/* Alternate tuning (partially derived from Vorbis) */ -#define BITALLOC_SIZE 11 -/* Bit allocation table in units of 1/32 bit/sample (0.1875 dB SNR) */ -static const unsigned char band_allocation[] = { -/*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 */ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 90, 80, 75, 69, 63, 56, 49, 40, 34, 29, 20, 18, 10, 0, 0, 0, 0, 0, 0, 0, 0, -110,100, 90, 84, 78, 71, 65, 58, 51, 45, 39, 32, 26, 20, 12, 0, 0, 0, 0, 0, 0, -118,110,103, 93, 86, 80, 75, 70, 65, 59, 53, 47, 40, 31, 23, 15, 4, 0, 0, 0, 0, -126,119,112,104, 95, 89, 83, 78, 72, 66, 60, 54, 47, 39, 32, 25, 17, 12, 1, 0, 0, -134,127,120,114,103, 97, 91, 85, 78, 72, 66, 60, 54, 47, 41, 35, 29, 23, 16, 10, 1, -144,137,130,124,113,107,101, 95, 88, 82, 76, 70, 64, 57, 51, 45, 39, 33, 26, 15, 1, -152,145,138,132,123,117,111,105, 98, 92, 86, 80, 74, 67, 61, 55, 49, 43, 36, 20, 1, -162,155,148,142,133,127,121,115,108,102, 96, 90, 84, 77, 71, 65, 59, 53, 46, 30, 1, -172,165,158,152,143,137,131,125,118,112,106,100, 94, 87, 81, 75, 69, 63, 56, 45, 20, -200,200,200,200,200,200,200,200,198,193,188,183,178,173,168,163,158,153,148,129,104, -}; - -#ifndef CUSTOM_MODES_ONLY - #ifdef OPUS_FIXED_POINT - #include "opus/celt/static_modes_fixed.h" - #else - #include "opus/celt/static_modes_float.h" - #endif -#endif /* CUSTOM_MODES_ONLY */ - -#ifndef M_PI -#define M_PI 3.141592653 -#endif - -#ifdef CUSTOM_MODES - -/* Defining 25 critical bands for the full 0-20 kHz audio bandwidth - Taken from http://ccrma.stanford.edu/~jos/bbt/Bark_Frequency_Scale.html */ -#define BARK_BANDS 25 -static const opus_int16 bark_freq[BARK_BANDS+1] = { - 0, 100, 200, 300, 400, - 510, 630, 770, 920, 1080, - 1270, 1480, 1720, 2000, 2320, - 2700, 3150, 3700, 4400, 5300, - 6400, 7700, 9500, 12000, 15500, - 20000}; - -static opus_int16 *compute_ebands(opus_int32 Fs, int frame_size, int res, int *nbEBands) -{ - opus_int16 *eBands; - int i, j, lin, low, high, nBark, offset=0; - - /* All modes that have 2.5 ms short blocks use the same definition */ - if (Fs == 400*(opus_int32)frame_size) - { - *nbEBands = sizeof(eband5ms)/sizeof(eband5ms[0])-1; - eBands = opus_alloc(sizeof(opus_int16)*(*nbEBands+1)); - for (i=0;i<*nbEBands+1;i++) - eBands[i] = eband5ms[i]; - return eBands; - } - /* Find the number of critical bands supported by our sampling rate */ - for (nBark=1;nBark<BARK_BANDS;nBark++) - if (bark_freq[nBark+1]*2 >= Fs) - break; - - /* Find where the linear part ends (i.e. where the spacing is more than min_width */ - for (lin=0;lin<nBark;lin++) - if (bark_freq[lin+1]-bark_freq[lin] >= res) - break; - - low = (bark_freq[lin]+res/2)/res; - high = nBark-lin; - *nbEBands = low+high; - eBands = opus_alloc(sizeof(opus_int16)*(*nbEBands+2)); - - if (eBands==NULL) - return NULL; - - /* Linear spacing (min_width) */ - for (i=0;i<low;i++) - eBands[i] = i; - if (low>0) - offset = eBands[low-1]*res - bark_freq[lin-1]; - /* Spacing follows critical bands */ - for (i=0;i<high;i++) - { - int target = bark_freq[lin+i]; - /* Round to an even value */ - eBands[i+low] = (target+offset/2+res)/(2*res)*2; - offset = eBands[i+low]*res - target; - } - /* Enforce the minimum spacing at the boundary */ - for (i=0;i<*nbEBands;i++) - if (eBands[i] < i) - eBands[i] = i; - /* Round to an even value */ - eBands[*nbEBands] = (bark_freq[nBark]+res)/(2*res)*2; - if (eBands[*nbEBands] > frame_size) - eBands[*nbEBands] = frame_size; - for (i=1;i<*nbEBands-1;i++) - { - if (eBands[i+1]-eBands[i] < eBands[i]-eBands[i-1]) - { - eBands[i] -= (2*eBands[i]-eBands[i-1]-eBands[i+1])/2; - } - } - /* Remove any empty bands. */ - for (i=j=0;i<*nbEBands;i++) - if(eBands[i+1]>eBands[j]) - eBands[++j]=eBands[i+1]; - *nbEBands=j; - - for (i=1;i<*nbEBands;i++) - { - /* Every band must be smaller than the last band. */ - celt_assert(eBands[i]-eBands[i-1]<=eBands[*nbEBands]-eBands[*nbEBands-1]); - /* Each band must be no larger than twice the size of the previous one. */ - celt_assert(eBands[i+1]-eBands[i]<=2*(eBands[i]-eBands[i-1])); - } - - return eBands; -} - -static void compute_allocation_table(CELTMode *mode) -{ - int i, j; - unsigned char *allocVectors; - int maxBands = sizeof(eband5ms)/sizeof(eband5ms[0])-1; - - mode->nbAllocVectors = BITALLOC_SIZE; - allocVectors = opus_alloc(sizeof(unsigned char)*(BITALLOC_SIZE*mode->nbEBands)); - if (allocVectors==NULL) - return; - - /* Check for standard mode */ - if (mode->Fs == 400*(opus_int32)mode->shortMdctSize) - { - for (i=0;i<BITALLOC_SIZE*mode->nbEBands;i++) - allocVectors[i] = band_allocation[i]; - mode->allocVectors = allocVectors; - return; - } - /* If not the standard mode, interpolate */ - /* Compute per-codec-band allocation from per-critical-band matrix */ - for (i=0;i<BITALLOC_SIZE;i++) - { - for (j=0;j<mode->nbEBands;j++) - { - int k; - for (k=0;k<maxBands;k++) - { - if (400*(opus_int32)eband5ms[k] > mode->eBands[j]*(opus_int32)mode->Fs/mode->shortMdctSize) - break; - } - if (k>maxBands-1) - allocVectors[i*mode->nbEBands+j] = band_allocation[i*maxBands + maxBands-1]; - else { - opus_int32 a0, a1; - a1 = mode->eBands[j]*(opus_int32)mode->Fs/mode->shortMdctSize - 400*(opus_int32)eband5ms[k-1]; - a0 = 400*(opus_int32)eband5ms[k] - mode->eBands[j]*(opus_int32)mode->Fs/mode->shortMdctSize; - allocVectors[i*mode->nbEBands+j] = (a0*band_allocation[i*maxBands+k-1] - + a1*band_allocation[i*maxBands+k])/(a0+a1); - } - } - } - - /*printf ("\n"); - for (i=0;i<BITALLOC_SIZE;i++) - { - for (j=0;j<mode->nbEBands;j++) - printf ("%d ", allocVectors[i*mode->nbEBands+j]); - printf ("\n"); - } - exit(0);*/ - - mode->allocVectors = allocVectors; -} - -#endif /* CUSTOM_MODES */ - -CELTMode *opus_custom_mode_create(opus_int32 Fs, int frame_size, int *error) -{ - int i; -#ifdef CUSTOM_MODES - CELTMode *mode=NULL; - int res; - opus_val16 *window; - opus_int16 *logN; - int LM; - int arch = opus_select_arch(); - ALLOC_STACK; -#if !defined(VAR_ARRAYS) && !defined(USE_ALLOCA) - if (global_stack==NULL) - goto failure; -#endif -#endif - -#ifndef CUSTOM_MODES_ONLY - for (i=0;i<TOTAL_MODES;i++) - { - int j; - for (j=0;j<4;j++) - { - if (Fs == static_mode_list[i]->Fs && - (frame_size<<j) == static_mode_list[i]->shortMdctSize*static_mode_list[i]->nbShortMdcts) - { - if (error) - *error = OPUS_OK; - return (CELTMode*)static_mode_list[i]; - } - } - } -#endif /* CUSTOM_MODES_ONLY */ - -#ifndef CUSTOM_MODES - if (error) - *error = OPUS_BAD_ARG; - return NULL; -#else - - /* The good thing here is that permutation of the arguments will automatically be invalid */ - - if (Fs < 8000 || Fs > 96000) - { - if (error) - *error = OPUS_BAD_ARG; - return NULL; - } - if (frame_size < 40 || frame_size > 1024 || frame_size%2!=0) - { - if (error) - *error = OPUS_BAD_ARG; - return NULL; - } - /* Frames of less than 1ms are not supported. */ - if ((opus_int32)frame_size*1000 < Fs) - { - if (error) - *error = OPUS_BAD_ARG; - return NULL; - } - - if ((opus_int32)frame_size*75 >= Fs && (frame_size%16)==0) - { - LM = 3; - } else if ((opus_int32)frame_size*150 >= Fs && (frame_size%8)==0) - { - LM = 2; - } else if ((opus_int32)frame_size*300 >= Fs && (frame_size%4)==0) - { - LM = 1; - } else - { - LM = 0; - } - - /* Shorts longer than 3.3ms are not supported. */ - if ((opus_int32)(frame_size>>LM)*300 > Fs) - { - if (error) - *error = OPUS_BAD_ARG; - return NULL; - } - - mode = opus_alloc(sizeof(CELTMode)); - if (mode==NULL) - goto failure; - mode->Fs = Fs; - - /* Pre/de-emphasis depends on sampling rate. The "standard" pre-emphasis - is defined as A(z) = 1 - 0.85*z^-1 at 48 kHz. Other rates should - approximate that. */ - if(Fs < 12000) /* 8 kHz */ - { - mode->preemph[0] = QCONST16(0.3500061035f, 15); - mode->preemph[1] = -QCONST16(0.1799926758f, 15); - mode->preemph[2] = QCONST16(0.2719968125f, SIG_SHIFT); /* exact 1/preemph[3] */ - mode->preemph[3] = QCONST16(3.6765136719f, 13); - } else if(Fs < 24000) /* 16 kHz */ - { - mode->preemph[0] = QCONST16(0.6000061035f, 15); - mode->preemph[1] = -QCONST16(0.1799926758f, 15); - mode->preemph[2] = QCONST16(0.4424998650f, SIG_SHIFT); /* exact 1/preemph[3] */ - mode->preemph[3] = QCONST16(2.2598876953f, 13); - } else if(Fs < 40000) /* 32 kHz */ - { - mode->preemph[0] = QCONST16(0.7799987793f, 15); - mode->preemph[1] = -QCONST16(0.1000061035f, 15); - mode->preemph[2] = QCONST16(0.7499771125f, SIG_SHIFT); /* exact 1/preemph[3] */ - mode->preemph[3] = QCONST16(1.3333740234f, 13); - } else /* 48 kHz */ - { - mode->preemph[0] = QCONST16(0.8500061035f, 15); - mode->preemph[1] = QCONST16(0.0f, 15); - mode->preemph[2] = QCONST16(1.f, SIG_SHIFT); - mode->preemph[3] = QCONST16(1.f, 13); - } - - mode->maxLM = LM; - mode->nbShortMdcts = 1<<LM; - mode->shortMdctSize = frame_size/mode->nbShortMdcts; - res = (mode->Fs+mode->shortMdctSize)/(2*mode->shortMdctSize); - - mode->eBands = compute_ebands(Fs, mode->shortMdctSize, res, &mode->nbEBands); - if (mode->eBands==NULL) - goto failure; -#if !defined(SMALL_FOOTPRINT) - /* Make sure we don't allocate a band larger than our PVQ table. - 208 should be enough, but let's be paranoid. */ - if ((mode->eBands[mode->nbEBands] - mode->eBands[mode->nbEBands-1])<<LM > - 208) { - goto failure; - } -#endif - - mode->effEBands = mode->nbEBands; - while (mode->eBands[mode->effEBands] > mode->shortMdctSize) - mode->effEBands--; - - /* Overlap must be divisible by 4 */ - mode->overlap = ((mode->shortMdctSize>>2)<<2); - - compute_allocation_table(mode); - if (mode->allocVectors==NULL) - goto failure; - - window = (opus_val16*)opus_alloc(mode->overlap*sizeof(opus_val16)); - if (window==NULL) - goto failure; - -#ifndef OPUS_FIXED_POINT - for (i=0;i<mode->overlap;i++) - window[i] = Q15ONE*sin(.5*M_PI* sin(.5*M_PI*(i+.5)/mode->overlap) * sin(.5*M_PI*(i+.5)/mode->overlap)); -#else - for (i=0;i<mode->overlap;i++) - 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)))); -#endif - mode->window = window; - - logN = (opus_int16*)opus_alloc(mode->nbEBands*sizeof(opus_int16)); - if (logN==NULL) - goto failure; - - for (i=0;i<mode->nbEBands;i++) - logN[i] = log2_frac(mode->eBands[i+1]-mode->eBands[i], BITRES); - mode->logN = logN; - - compute_pulse_cache(mode, mode->maxLM); - - if (clt_mdct_init(&mode->mdct, 2*mode->shortMdctSize*mode->nbShortMdcts, - mode->maxLM, arch) == 0) - goto failure; - - if (error) - *error = OPUS_OK; - - return mode; -failure: - if (error) - *error = OPUS_ALLOC_FAIL; - if (mode!=NULL) - opus_custom_mode_destroy(mode); - return NULL; -#endif /* !CUSTOM_MODES */ -} - -#ifdef CUSTOM_MODES -void opus_custom_mode_destroy(CELTMode *mode) -{ - int arch = opus_select_arch(); - - if (mode == NULL) - return; -#ifndef CUSTOM_MODES_ONLY - { - int i; - for (i=0;i<TOTAL_MODES;i++) - { - if (mode == static_mode_list[i]) - { - return; - } - } - } -#endif /* CUSTOM_MODES_ONLY */ - opus_free((opus_int16*)mode->eBands); - 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, arch); - - opus_free((CELTMode *)mode); -} -#endif |