d9a291f641
Took the opportunity to undo the Godot changed made to the opus source. The opus module should eventually be built in its own environment to avoid polluting others with too many include dirs and defines. TODO: Fix the platform/ stuff for opus.
299 lines
8.1 KiB
C
299 lines
8.1 KiB
C
/* Copyright (c) 2007-2008 CSIRO
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Copyright (c) 2007-2010 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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#define CELT_C
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#include "os_support.h"
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#include "mdct.h"
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#include <math.h>
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#include "celt.h"
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#include "pitch.h"
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#include "bands.h"
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#include "modes.h"
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#include "entcode.h"
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#include "quant_bands.h"
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#include "rate.h"
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#include "stack_alloc.h"
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#include "mathops.h"
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#include "float_cast.h"
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#include <stdarg.h>
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#include "celt_lpc.h"
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#include "vq.h"
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#ifndef PACKAGE_VERSION
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#define PACKAGE_VERSION "unknown"
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#endif
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#if defined(MIPSr1_ASM)
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#include "mips/celt_mipsr1.h"
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#endif
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int resampling_factor(opus_int32 rate)
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{
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int ret;
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switch (rate)
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{
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case 48000:
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ret = 1;
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break;
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case 24000:
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ret = 2;
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break;
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case 16000:
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ret = 3;
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break;
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case 12000:
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ret = 4;
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break;
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case 8000:
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ret = 6;
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break;
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default:
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#ifndef CUSTOM_MODES
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celt_assert(0);
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#endif
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ret = 0;
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break;
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}
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return ret;
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}
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#if !defined(OVERRIDE_COMB_FILTER_CONST) || defined(NON_STATIC_COMB_FILTER_CONST_C)
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/* This version should be faster on ARM */
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#ifdef OPUS_ARM_ASM
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#ifndef NON_STATIC_COMB_FILTER_CONST_C
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static
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#endif
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void comb_filter_const_c(opus_val32 *y, opus_val32 *x, int T, int N,
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opus_val16 g10, opus_val16 g11, opus_val16 g12)
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{
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opus_val32 x0, x1, x2, x3, x4;
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int i;
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x4 = SHL32(x[-T-2], 1);
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x3 = SHL32(x[-T-1], 1);
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x2 = SHL32(x[-T], 1);
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x1 = SHL32(x[-T+1], 1);
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for (i=0;i<N-4;i+=5)
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{
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opus_val32 t;
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x0=SHL32(x[i-T+2],1);
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t = MAC16_32_Q16(x[i], g10, x2);
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t = MAC16_32_Q16(t, g11, ADD32(x1,x3));
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t = MAC16_32_Q16(t, g12, ADD32(x0,x4));
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y[i] = t;
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x4=SHL32(x[i-T+3],1);
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t = MAC16_32_Q16(x[i+1], g10, x1);
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t = MAC16_32_Q16(t, g11, ADD32(x0,x2));
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t = MAC16_32_Q16(t, g12, ADD32(x4,x3));
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y[i+1] = t;
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x3=SHL32(x[i-T+4],1);
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t = MAC16_32_Q16(x[i+2], g10, x0);
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t = MAC16_32_Q16(t, g11, ADD32(x4,x1));
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t = MAC16_32_Q16(t, g12, ADD32(x3,x2));
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y[i+2] = t;
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x2=SHL32(x[i-T+5],1);
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t = MAC16_32_Q16(x[i+3], g10, x4);
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t = MAC16_32_Q16(t, g11, ADD32(x3,x0));
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t = MAC16_32_Q16(t, g12, ADD32(x2,x1));
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y[i+3] = t;
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x1=SHL32(x[i-T+6],1);
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t = MAC16_32_Q16(x[i+4], g10, x3);
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t = MAC16_32_Q16(t, g11, ADD32(x2,x4));
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t = MAC16_32_Q16(t, g12, ADD32(x1,x0));
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y[i+4] = t;
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}
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#ifdef CUSTOM_MODES
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for (;i<N;i++)
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{
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opus_val32 t;
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x0=SHL32(x[i-T+2],1);
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t = MAC16_32_Q16(x[i], g10, x2);
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t = MAC16_32_Q16(t, g11, ADD32(x1,x3));
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t = MAC16_32_Q16(t, g12, ADD32(x0,x4));
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y[i] = t;
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x4=x3;
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x3=x2;
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x2=x1;
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x1=x0;
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}
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#endif
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}
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#else
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#ifndef NON_STATIC_COMB_FILTER_CONST_C
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static
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#endif
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void comb_filter_const_c(opus_val32 *y, opus_val32 *x, int T, int N,
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opus_val16 g10, opus_val16 g11, opus_val16 g12)
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{
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opus_val32 x0, x1, x2, x3, x4;
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int i;
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x4 = x[-T-2];
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x3 = x[-T-1];
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x2 = x[-T];
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x1 = x[-T+1];
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for (i=0;i<N;i++)
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{
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x0=x[i-T+2];
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y[i] = x[i]
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+ MULT16_32_Q15(g10,x2)
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+ MULT16_32_Q15(g11,ADD32(x1,x3))
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+ MULT16_32_Q15(g12,ADD32(x0,x4));
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x4=x3;
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x3=x2;
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x2=x1;
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x1=x0;
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}
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}
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#endif
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#endif
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#ifndef OVERRIDE_comb_filter
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void comb_filter(opus_val32 *y, opus_val32 *x, int T0, int T1, int N,
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opus_val16 g0, opus_val16 g1, int tapset0, int tapset1,
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const opus_val16 *window, int overlap, int arch)
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{
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int i;
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/* printf ("%d %d %f %f\n", T0, T1, g0, g1); */
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opus_val16 g00, g01, g02, g10, g11, g12;
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opus_val32 x0, x1, x2, x3, x4;
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static const opus_val16 gains[3][3] = {
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{QCONST16(0.3066406250f, 15), QCONST16(0.2170410156f, 15), QCONST16(0.1296386719f, 15)},
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{QCONST16(0.4638671875f, 15), QCONST16(0.2680664062f, 15), QCONST16(0.f, 15)},
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{QCONST16(0.7998046875f, 15), QCONST16(0.1000976562f, 15), QCONST16(0.f, 15)}};
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if (g0==0 && g1==0)
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{
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/* OPT: Happens to work without the OPUS_MOVE(), but only because the current encoder already copies x to y */
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if (x!=y)
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OPUS_MOVE(y, x, N);
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return;
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}
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g00 = MULT16_16_P15(g0, gains[tapset0][0]);
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g01 = MULT16_16_P15(g0, gains[tapset0][1]);
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g02 = MULT16_16_P15(g0, gains[tapset0][2]);
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g10 = MULT16_16_P15(g1, gains[tapset1][0]);
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g11 = MULT16_16_P15(g1, gains[tapset1][1]);
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g12 = MULT16_16_P15(g1, gains[tapset1][2]);
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x1 = x[-T1+1];
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x2 = x[-T1 ];
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x3 = x[-T1-1];
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x4 = x[-T1-2];
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/* If the filter didn't change, we don't need the overlap */
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if (g0==g1 && T0==T1 && tapset0==tapset1)
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overlap=0;
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for (i=0;i<overlap;i++)
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{
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opus_val16 f;
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x0=x[i-T1+2];
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f = MULT16_16_Q15(window[i],window[i]);
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y[i] = x[i]
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+ MULT16_32_Q15(MULT16_16_Q15((Q15ONE-f),g00),x[i-T0])
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+ MULT16_32_Q15(MULT16_16_Q15((Q15ONE-f),g01),ADD32(x[i-T0+1],x[i-T0-1]))
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+ MULT16_32_Q15(MULT16_16_Q15((Q15ONE-f),g02),ADD32(x[i-T0+2],x[i-T0-2]))
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+ MULT16_32_Q15(MULT16_16_Q15(f,g10),x2)
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+ MULT16_32_Q15(MULT16_16_Q15(f,g11),ADD32(x1,x3))
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+ MULT16_32_Q15(MULT16_16_Q15(f,g12),ADD32(x0,x4));
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x4=x3;
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x3=x2;
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x2=x1;
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x1=x0;
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}
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if (g1==0)
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{
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/* OPT: Happens to work without the OPUS_MOVE(), but only because the current encoder already copies x to y */
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if (x!=y)
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OPUS_MOVE(y+overlap, x+overlap, N-overlap);
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return;
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}
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/* Compute the part with the constant filter. */
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comb_filter_const(y+i, x+i, T1, N-i, g10, g11, g12, arch);
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}
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#endif /* OVERRIDE_comb_filter */
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const signed char tf_select_table[4][8] = {
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{0, -1, 0, -1, 0,-1, 0,-1},
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{0, -1, 0, -2, 1, 0, 1,-1},
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{0, -2, 0, -3, 2, 0, 1,-1},
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{0, -2, 0, -3, 3, 0, 1,-1},
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};
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void init_caps(const CELTMode *m,int *cap,int LM,int C)
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{
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int i;
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for (i=0;i<m->nbEBands;i++)
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{
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int N;
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N=(m->eBands[i+1]-m->eBands[i])<<LM;
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cap[i] = (m->cache.caps[m->nbEBands*(2*LM+C-1)+i]+64)*C*N>>2;
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}
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}
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const char *opus_strerror(int error)
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{
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static const char * const error_strings[8] = {
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"success",
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"invalid argument",
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"buffer too small",
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"internal error",
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"corrupted stream",
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"request not implemented",
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"invalid state",
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"memory allocation failed"
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};
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if (error > 0 || error < -7)
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return "unknown error";
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else
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return error_strings[-error];
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}
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const char *opus_get_version_string(void)
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{
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return "libopus " PACKAGE_VERSION
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/* Applications may rely on the presence of this substring in the version
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string to determine if they have a fixed-point or floating-point build
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at runtime. */
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#ifdef FIXED_POINT
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"-fixed"
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#endif
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#ifdef FUZZING
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"-fuzzing"
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#endif
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;
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}
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