491 lines
15 KiB
C
491 lines
15 KiB
C
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/*
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* Copyright (C) 2016 foo86
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/mem.h"
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#include "dcadsp.h"
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#include "dcamath.h"
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static void decode_hf_c(int32_t **dst,
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const int32_t *vq_index,
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const int8_t hf_vq[1024][32],
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int32_t scale_factors[32][2],
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ptrdiff_t sb_start, ptrdiff_t sb_end,
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ptrdiff_t ofs, ptrdiff_t len)
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{
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int i, j;
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for (i = sb_start; i < sb_end; i++) {
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const int8_t *coeff = hf_vq[vq_index[i]];
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int32_t scale = scale_factors[i][0];
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for (j = 0; j < len; j++)
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dst[i][j + ofs] = clip23(coeff[j] * scale + (1 << 3) >> 4);
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}
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}
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static void decode_joint_c(int32_t **dst, int32_t **src,
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const int32_t *scale_factors,
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ptrdiff_t sb_start, ptrdiff_t sb_end,
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ptrdiff_t ofs, ptrdiff_t len)
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{
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int i, j;
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for (i = sb_start; i < sb_end; i++) {
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int32_t scale = scale_factors[i];
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for (j = 0; j < len; j++)
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dst[i][j + ofs] = clip23(mul17(src[i][j + ofs], scale));
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}
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}
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static void lfe_fir_float_c(float *pcm_samples, int32_t *lfe_samples,
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const float *filter_coeff, ptrdiff_t npcmblocks,
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int dec_select)
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{
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// Select decimation factor
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int factor = 64 << dec_select;
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int ncoeffs = 8 >> dec_select;
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int nlfesamples = npcmblocks >> (dec_select + 1);
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int i, j, k;
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for (i = 0; i < nlfesamples; i++) {
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// One decimated sample generates 64 or 128 interpolated ones
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for (j = 0; j < factor / 2; j++) {
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float a = 0;
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float b = 0;
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for (k = 0; k < ncoeffs; k++) {
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a += filter_coeff[ j * ncoeffs + k] * lfe_samples[-k];
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b += filter_coeff[255 - j * ncoeffs - k] * lfe_samples[-k];
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}
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pcm_samples[ j] = a;
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pcm_samples[factor / 2 + j] = b;
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}
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lfe_samples++;
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pcm_samples += factor;
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}
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}
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static void lfe_fir0_float_c(float *pcm_samples, int32_t *lfe_samples,
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const float *filter_coeff, ptrdiff_t npcmblocks)
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{
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lfe_fir_float_c(pcm_samples, lfe_samples, filter_coeff, npcmblocks, 0);
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}
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static void lfe_fir1_float_c(float *pcm_samples, int32_t *lfe_samples,
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const float *filter_coeff, ptrdiff_t npcmblocks)
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{
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lfe_fir_float_c(pcm_samples, lfe_samples, filter_coeff, npcmblocks, 1);
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}
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static void lfe_x96_float_c(float *dst, const float *src,
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float *hist, ptrdiff_t len)
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{
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float prev = *hist;
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int i;
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for (i = 0; i < len; i++) {
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float a = 0.25f * src[i] + 0.75f * prev;
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float b = 0.75f * src[i] + 0.25f * prev;
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prev = src[i];
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*dst++ = a;
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*dst++ = b;
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}
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*hist = prev;
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}
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static void sub_qmf32_float_c(SynthFilterContext *synth,
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FFTContext *imdct,
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float *pcm_samples,
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int32_t **subband_samples_lo,
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int32_t **subband_samples_hi,
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float *hist1, int *offset, float *hist2,
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const float *filter_coeff, ptrdiff_t npcmblocks,
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float scale)
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{
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LOCAL_ALIGNED_32(float, input, [32]);
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int i, j;
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for (j = 0; j < npcmblocks; j++) {
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// Load in one sample from each subband
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for (i = 0; i < 32; i++) {
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if ((i - 1) & 2)
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input[i] = -subband_samples_lo[i][j];
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else
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input[i] = subband_samples_lo[i][j];
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}
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// One subband sample generates 32 interpolated ones
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synth->synth_filter_float(imdct, hist1, offset,
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hist2, filter_coeff,
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pcm_samples, input, scale);
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pcm_samples += 32;
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}
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}
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static void sub_qmf64_float_c(SynthFilterContext *synth,
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FFTContext *imdct,
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float *pcm_samples,
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int32_t **subband_samples_lo,
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int32_t **subband_samples_hi,
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float *hist1, int *offset, float *hist2,
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const float *filter_coeff, ptrdiff_t npcmblocks,
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float scale)
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{
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LOCAL_ALIGNED_32(float, input, [64]);
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int i, j;
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if (!subband_samples_hi)
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memset(&input[32], 0, sizeof(input[0]) * 32);
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for (j = 0; j < npcmblocks; j++) {
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// Load in one sample from each subband
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if (subband_samples_hi) {
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// Full 64 subbands, first 32 are residual coded
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for (i = 0; i < 32; i++) {
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if ((i - 1) & 2)
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input[i] = -subband_samples_lo[i][j] - subband_samples_hi[i][j];
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else
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input[i] = subband_samples_lo[i][j] + subband_samples_hi[i][j];
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}
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for (i = 32; i < 64; i++) {
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if ((i - 1) & 2)
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input[i] = -subband_samples_hi[i][j];
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else
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input[i] = subband_samples_hi[i][j];
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}
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} else {
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// Only first 32 subbands
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for (i = 0; i < 32; i++) {
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if ((i - 1) & 2)
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input[i] = -subband_samples_lo[i][j];
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else
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input[i] = subband_samples_lo[i][j];
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}
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}
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// One subband sample generates 64 interpolated ones
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synth->synth_filter_float_64(imdct, hist1, offset,
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hist2, filter_coeff,
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pcm_samples, input, scale);
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pcm_samples += 64;
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}
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}
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static void lfe_fir_fixed_c(int32_t *pcm_samples, int32_t *lfe_samples,
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const int32_t *filter_coeff, ptrdiff_t npcmblocks)
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{
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// Select decimation factor
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int nlfesamples = npcmblocks >> 1;
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int i, j, k;
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for (i = 0; i < nlfesamples; i++) {
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// One decimated sample generates 64 interpolated ones
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for (j = 0; j < 32; j++) {
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int64_t a = 0;
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int64_t b = 0;
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for (k = 0; k < 8; k++) {
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a += (int64_t)filter_coeff[ j * 8 + k] * lfe_samples[-k];
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b += (int64_t)filter_coeff[255 - j * 8 - k] * lfe_samples[-k];
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}
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pcm_samples[ j] = clip23(norm23(a));
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pcm_samples[32 + j] = clip23(norm23(b));
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}
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lfe_samples++;
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pcm_samples += 64;
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}
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}
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static void lfe_x96_fixed_c(int32_t *dst, const int32_t *src,
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int32_t *hist, ptrdiff_t len)
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{
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int32_t prev = *hist;
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int i;
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for (i = 0; i < len; i++) {
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int64_t a = INT64_C(2097471) * src[i] + INT64_C(6291137) * prev;
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int64_t b = INT64_C(6291137) * src[i] + INT64_C(2097471) * prev;
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prev = src[i];
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*dst++ = clip23(norm23(a));
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*dst++ = clip23(norm23(b));
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}
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*hist = prev;
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}
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static void sub_qmf32_fixed_c(SynthFilterContext *synth,
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DCADCTContext *imdct,
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int32_t *pcm_samples,
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int32_t **subband_samples_lo,
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int32_t **subband_samples_hi,
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int32_t *hist1, int *offset, int32_t *hist2,
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const int32_t *filter_coeff, ptrdiff_t npcmblocks)
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{
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LOCAL_ALIGNED_32(int32_t, input, [32]);
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int i, j;
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for (j = 0; j < npcmblocks; j++) {
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// Load in one sample from each subband
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for (i = 0; i < 32; i++)
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input[i] = subband_samples_lo[i][j];
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// One subband sample generates 32 interpolated ones
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synth->synth_filter_fixed(imdct, hist1, offset,
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hist2, filter_coeff,
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pcm_samples, input);
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pcm_samples += 32;
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}
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}
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static void sub_qmf64_fixed_c(SynthFilterContext *synth,
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DCADCTContext *imdct,
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int32_t *pcm_samples,
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int32_t **subband_samples_lo,
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int32_t **subband_samples_hi,
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int32_t *hist1, int *offset, int32_t *hist2,
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const int32_t *filter_coeff, ptrdiff_t npcmblocks)
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{
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LOCAL_ALIGNED_32(int32_t, input, [64]);
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int i, j;
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if (!subband_samples_hi)
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memset(&input[32], 0, sizeof(input[0]) * 32);
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for (j = 0; j < npcmblocks; j++) {
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// Load in one sample from each subband
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if (subband_samples_hi) {
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// Full 64 subbands, first 32 are residual coded
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for (i = 0; i < 32; i++)
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input[i] = subband_samples_lo[i][j] + subband_samples_hi[i][j];
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for (i = 32; i < 64; i++)
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input[i] = subband_samples_hi[i][j];
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} else {
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// Only first 32 subbands
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for (i = 0; i < 32; i++)
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input[i] = subband_samples_lo[i][j];
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}
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// One subband sample generates 64 interpolated ones
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synth->synth_filter_fixed_64(imdct, hist1, offset,
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hist2, filter_coeff,
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pcm_samples, input);
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pcm_samples += 64;
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}
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}
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static void decor_c(int32_t *dst, const int32_t *src, int coeff, ptrdiff_t len)
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{
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int i;
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for (i = 0; i < len; i++)
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dst[i] += (SUINT)((int)(src[i] * (SUINT)coeff + (1 << 2)) >> 3);
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}
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static void dmix_sub_xch_c(int32_t *dst1, int32_t *dst2,
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const int32_t *src, ptrdiff_t len)
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{
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int i;
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for (i = 0; i < len; i++) {
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int32_t cs = mul23(src[i], 5931520 /* M_SQRT1_2 * (1 << 23) */);
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dst1[i] -= cs;
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dst2[i] -= cs;
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}
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}
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static void dmix_sub_c(int32_t *dst, const int32_t *src, int coeff, ptrdiff_t len)
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{
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int i;
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for (i = 0; i < len; i++)
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dst[i] -= (unsigned)mul15(src[i], coeff);
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}
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static void dmix_add_c(int32_t *dst, const int32_t *src, int coeff, ptrdiff_t len)
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{
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int i;
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for (i = 0; i < len; i++)
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dst[i] += mul15(src[i], coeff);
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}
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static void dmix_scale_c(int32_t *dst, int scale, ptrdiff_t len)
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{
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int i;
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for (i = 0; i < len; i++)
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dst[i] = mul15(dst[i], scale);
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}
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static void dmix_scale_inv_c(int32_t *dst, int scale_inv, ptrdiff_t len)
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{
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int i;
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for (i = 0; i < len; i++)
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dst[i] = mul16(dst[i], scale_inv);
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}
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static void filter0(SUINT32 *dst, const int32_t *src, int32_t coeff, ptrdiff_t len)
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{
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int i;
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for (i = 0; i < len; i++)
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dst[i] -= mul22(src[i], coeff);
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}
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static void filter1(SUINT32 *dst, const int32_t *src, int32_t coeff, ptrdiff_t len)
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{
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int i;
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for (i = 0; i < len; i++)
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dst[i] -= mul23(src[i], coeff);
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}
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static void assemble_freq_bands_c(int32_t *dst, int32_t *src0, int32_t *src1,
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const int32_t *coeff, ptrdiff_t len)
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{
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int i;
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filter0(src0, src1, coeff[0], len);
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filter0(src1, src0, coeff[1], len);
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filter0(src0, src1, coeff[2], len);
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filter0(src1, src0, coeff[3], len);
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for (i = 0; i < 8; i++, src0--) {
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filter1(src0, src1, coeff[i + 4], len);
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filter1(src1, src0, coeff[i + 12], len);
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filter1(src0, src1, coeff[i + 4], len);
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}
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for (i = 0; i < len; i++) {
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*dst++ = *src1++;
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*dst++ = *++src0;
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}
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}
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static void lbr_bank_c(float output[32][4], float **input,
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const float *coeff, ptrdiff_t ofs, ptrdiff_t len)
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{
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float SW0 = coeff[0];
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float SW1 = coeff[1];
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float SW2 = coeff[2];
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float SW3 = coeff[3];
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float C1 = coeff[4];
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float C2 = coeff[5];
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|
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float C3 = coeff[6];
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float C4 = coeff[7];
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|
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float AL1 = coeff[8];
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float AL2 = coeff[9];
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|
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|
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|
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int i;
|
||
|
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|
||
|
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// Short window and 8 point forward MDCT
|
||
|
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for (i = 0; i < len; i++) {
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float *src = input[i] + ofs;
|
||
|
|
|
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|
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float a = src[-4] * SW0 - src[-1] * SW3;
|
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|
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float b = src[-3] * SW1 - src[-2] * SW2;
|
||
|
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float c = src[ 2] * SW1 + src[ 1] * SW2;
|
||
|
|
float d = src[ 3] * SW0 + src[ 0] * SW3;
|
||
|
|
|
||
|
|
output[i][0] = C1 * b - C2 * c + C4 * a - C3 * d;
|
||
|
|
output[i][1] = C1 * d - C2 * a - C4 * b - C3 * c;
|
||
|
|
output[i][2] = C3 * b + C2 * d - C4 * c + C1 * a;
|
||
|
|
output[i][3] = C3 * a - C2 * b + C4 * d - C1 * c;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Aliasing cancellation for high frequencies
|
||
|
|
for (i = 12; i < len - 1; i++) {
|
||
|
|
float a = output[i ][3] * AL1;
|
||
|
|
float b = output[i+1][0] * AL1;
|
||
|
|
output[i ][3] += b - a;
|
||
|
|
output[i+1][0] -= b + a;
|
||
|
|
a = output[i ][2] * AL2;
|
||
|
|
b = output[i+1][1] * AL2;
|
||
|
|
output[i ][2] += b - a;
|
||
|
|
output[i+1][1] -= b + a;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void lfe_iir_c(float *output, const float *input,
|
||
|
|
const float iir[5][4], float hist[5][2],
|
||
|
|
ptrdiff_t factor)
|
||
|
|
{
|
||
|
|
float res, tmp;
|
||
|
|
int i, j, k;
|
||
|
|
|
||
|
|
for (i = 0; i < 64; i++) {
|
||
|
|
res = *input++;
|
||
|
|
|
||
|
|
for (j = 0; j < factor; j++) {
|
||
|
|
for (k = 0; k < 5; k++) {
|
||
|
|
tmp = hist[k][0] * iir[k][0] + hist[k][1] * iir[k][1] + res;
|
||
|
|
res = hist[k][0] * iir[k][2] + hist[k][1] * iir[k][3] + tmp;
|
||
|
|
|
||
|
|
hist[k][0] = hist[k][1];
|
||
|
|
hist[k][1] = tmp;
|
||
|
|
}
|
||
|
|
|
||
|
|
*output++ = res;
|
||
|
|
res = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
av_cold void ff_dcadsp_init(DCADSPContext *s)
|
||
|
|
{
|
||
|
|
s->decode_hf = decode_hf_c;
|
||
|
|
s->decode_joint = decode_joint_c;
|
||
|
|
|
||
|
|
s->lfe_fir_float[0] = lfe_fir0_float_c;
|
||
|
|
s->lfe_fir_float[1] = lfe_fir1_float_c;
|
||
|
|
s->lfe_x96_float = lfe_x96_float_c;
|
||
|
|
s->sub_qmf_float[0] = sub_qmf32_float_c;
|
||
|
|
s->sub_qmf_float[1] = sub_qmf64_float_c;
|
||
|
|
|
||
|
|
s->lfe_fir_fixed = lfe_fir_fixed_c;
|
||
|
|
s->lfe_x96_fixed = lfe_x96_fixed_c;
|
||
|
|
s->sub_qmf_fixed[0] = sub_qmf32_fixed_c;
|
||
|
|
s->sub_qmf_fixed[1] = sub_qmf64_fixed_c;
|
||
|
|
|
||
|
|
s->decor = decor_c;
|
||
|
|
|
||
|
|
s->dmix_sub_xch = dmix_sub_xch_c;
|
||
|
|
s->dmix_sub = dmix_sub_c;
|
||
|
|
s->dmix_add = dmix_add_c;
|
||
|
|
s->dmix_scale = dmix_scale_c;
|
||
|
|
s->dmix_scale_inv = dmix_scale_inv_c;
|
||
|
|
|
||
|
|
s->assemble_freq_bands = assemble_freq_bands_c;
|
||
|
|
|
||
|
|
s->lbr_bank = lbr_bank_c;
|
||
|
|
s->lfe_iir = lfe_iir_c;
|
||
|
|
|
||
|
|
if (ARCH_X86)
|
||
|
|
ff_dcadsp_init_x86(s);
|
||
|
|
}
|