mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
aacsbr: move some simdable loops to function pointers
This prepares for assembly optimisations by moving the most time-consuming loops to functions called through pointers in a new context. Signed-off-by: Mans Rullgard <mans@mansr.com>
This commit is contained in:
Mans Rullgard
parent
7181c4edee
commit
aac46e088d
@ -52,7 +52,8 @@ OBJS-$(CONFIG_VDPAU) += vdpau.o
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OBJS-$(CONFIG_A64MULTI_ENCODER) += a64multienc.o elbg.o
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OBJS-$(CONFIG_A64MULTI5_ENCODER) += a64multienc.o elbg.o
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OBJS-$(CONFIG_AAC_DECODER) += aacdec.o aactab.o aacsbr.o aacps.o \
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aacadtsdec.o mpeg4audio.o kbdwin.o
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aacadtsdec.o mpeg4audio.o kbdwin.o \
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sbrdsp.o
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OBJS-$(CONFIG_AAC_ENCODER) += aacenc.o aaccoder.o \
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aacpsy.o aactab.o \
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psymodel.o iirfilter.o \
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@ -32,6 +32,7 @@
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#include "aacsbrdata.h"
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#include "fft.h"
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#include "aacps.h"
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#include "sbrdsp.h"
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#include "libavutil/libm.h"
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#include <stdint.h>
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@ -140,6 +141,7 @@ av_cold void ff_aac_sbr_ctx_init(AACContext *ac, SpectralBandReplication *sbr)
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ff_mdct_init(&sbr->mdct, 7, 1, 1.0 / (64 * mdct_scale));
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ff_mdct_init(&sbr->mdct_ana, 7, 1, -2.0 * mdct_scale);
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ff_ps_ctx_init(&sbr->ps);
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ff_sbrdsp_init(&sbr->dsp);
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}
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av_cold void ff_aac_sbr_ctx_close(SpectralBandReplication *sbr)
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@ -1139,33 +1141,21 @@ static void sbr_dequant(SpectralBandReplication *sbr, int id_aac)
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* @param x pointer to the beginning of the first sample window
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* @param W array of complex-valued samples split into subbands
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*/
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static void sbr_qmf_analysis(DSPContext *dsp, FFTContext *mdct, const float *in, float *x,
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static void sbr_qmf_analysis(DSPContext *dsp, FFTContext *mdct,
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SBRDSPContext *sbrdsp, const float *in, float *x,
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float z[320], float W[2][32][32][2])
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{
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int i, k;
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int i;
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memcpy(W[0], W[1], sizeof(W[0]));
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memcpy(x , x+1024, (320-32)*sizeof(x[0]));
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memcpy(x+288, in, 1024*sizeof(x[0]));
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for (i = 0; i < 32; i++) { // numTimeSlots*RATE = 16*2 as 960 sample frames
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// are not supported
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dsp->vector_fmul_reverse(z, sbr_qmf_window_ds, x, 320);
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for (k = 0; k < 64; k++) {
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float f = z[k] + z[k + 64] + z[k + 128] + z[k + 192] + z[k + 256];
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z[k] = f;
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}
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//Shuffle to IMDCT
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z[64] = z[0];
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for (k = 1; k < 32; k++) {
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z[64+2*k-1] = z[ k];
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z[64+2*k ] = -z[64-k];
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}
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z[64+63] = z[32];
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sbrdsp->sum64x5(z);
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sbrdsp->qmf_pre_shuffle(z);
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mdct->imdct_half(mdct, z, z+64);
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for (k = 0; k < 32; k++) {
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W[1][i][k][0] = -z[63-k];
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W[1][i][k][1] = z[k];
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}
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sbrdsp->qmf_post_shuffle(W[1][i], z);
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x += 32;
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}
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}
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@ -1175,6 +1165,7 @@ static void sbr_qmf_analysis(DSPContext *dsp, FFTContext *mdct, const float *in,
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* (14496-3 sp04 p206)
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*/
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static void sbr_qmf_synthesis(DSPContext *dsp, FFTContext *mdct,
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SBRDSPContext *sbrdsp,
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float *out, float X[2][38][64],
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float mdct_buf[2][64],
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float *v0, int *v_off, const unsigned int div)
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@ -1198,20 +1189,12 @@ static void sbr_qmf_synthesis(DSPContext *dsp, FFTContext *mdct,
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X[0][i][32+n] = X[1][i][31-n];
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}
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mdct->imdct_half(mdct, mdct_buf[0], X[0][i]);
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for (n = 0; n < 32; n++) {
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v[ n] = mdct_buf[0][63 - 2*n];
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v[63 - n] = -mdct_buf[0][62 - 2*n];
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}
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sbrdsp->qmf_deint_neg(v, mdct_buf[0]);
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} else {
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for (n = 1; n < 64; n+=2) {
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X[1][i][n] = -X[1][i][n];
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}
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sbrdsp->neg_odd_64(X[1][i]);
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mdct->imdct_half(mdct, mdct_buf[0], X[0][i]);
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mdct->imdct_half(mdct, mdct_buf[1], X[1][i]);
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for (n = 0; n < 64; n++) {
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v[ n] = -mdct_buf[0][63 - n] + mdct_buf[1][ n ];
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v[127 - n] = mdct_buf[0][63 - n] + mdct_buf[1][ n ];
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}
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sbrdsp->qmf_deint_bfly(v, mdct_buf[1], mdct_buf[0]);
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}
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dsp->vector_fmul_add(out, v , sbr_qmf_window , zero64, 64 >> div);
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dsp->vector_fmul_add(out, v + ( 192 >> div), sbr_qmf_window + ( 64 >> div), out , 64 >> div);
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@ -1227,45 +1210,19 @@ static void sbr_qmf_synthesis(DSPContext *dsp, FFTContext *mdct,
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}
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}
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static void autocorrelate(const float x[40][2], float phi[3][2][2], int lag)
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{
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int i;
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float real_sum = 0.0f;
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float imag_sum = 0.0f;
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if (lag) {
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for (i = 1; i < 38; i++) {
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real_sum += x[i][0] * x[i+lag][0] + x[i][1] * x[i+lag][1];
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imag_sum += x[i][0] * x[i+lag][1] - x[i][1] * x[i+lag][0];
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}
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phi[2-lag][1][0] = real_sum + x[ 0][0] * x[lag][0] + x[ 0][1] * x[lag][1];
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phi[2-lag][1][1] = imag_sum + x[ 0][0] * x[lag][1] - x[ 0][1] * x[lag][0];
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if (lag == 1) {
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phi[0][0][0] = real_sum + x[38][0] * x[39][0] + x[38][1] * x[39][1];
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phi[0][0][1] = imag_sum + x[38][0] * x[39][1] - x[38][1] * x[39][0];
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}
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} else {
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for (i = 1; i < 38; i++) {
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real_sum += x[i][0] * x[i][0] + x[i][1] * x[i][1];
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}
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phi[2][1][0] = real_sum + x[ 0][0] * x[ 0][0] + x[ 0][1] * x[ 0][1];
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phi[1][0][0] = real_sum + x[38][0] * x[38][0] + x[38][1] * x[38][1];
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}
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}
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/** High Frequency Generation (14496-3 sp04 p214+) and Inverse Filtering
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* (14496-3 sp04 p214)
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* Warning: This routine does not seem numerically stable.
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*/
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static void sbr_hf_inverse_filter(float (*alpha0)[2], float (*alpha1)[2],
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static void sbr_hf_inverse_filter(SBRDSPContext *dsp,
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float (*alpha0)[2], float (*alpha1)[2],
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const float X_low[32][40][2], int k0)
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{
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int k;
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for (k = 0; k < k0; k++) {
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float phi[3][2][2], dk;
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autocorrelate(X_low[k], phi, 0);
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autocorrelate(X_low[k], phi, 1);
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autocorrelate(X_low[k], phi, 2);
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dsp->autocorrelate(X_low[k], phi);
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dk = phi[2][1][0] * phi[1][0][0] -
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(phi[1][1][0] * phi[1][1][0] + phi[1][1][1] * phi[1][1][1]) / 1.000001f;
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@ -1361,12 +1318,11 @@ static int sbr_hf_gen(AACContext *ac, SpectralBandReplication *sbr,
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const float bw_array[5], const uint8_t *t_env,
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int bs_num_env)
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{
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int i, j, x;
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int j, x;
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int g = 0;
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int k = sbr->kx[1];
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for (j = 0; j < sbr->num_patches; j++) {
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for (x = 0; x < sbr->patch_num_subbands[j]; x++, k++) {
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float alpha[4];
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const int p = sbr->patch_start_subband[j] + x;
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while (g <= sbr->n_q && k >= sbr->f_tablenoise[g])
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g++;
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@ -1378,26 +1334,10 @@ static int sbr_hf_gen(AACContext *ac, SpectralBandReplication *sbr,
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return -1;
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}
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alpha[0] = alpha1[p][0] * bw_array[g] * bw_array[g];
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alpha[1] = alpha1[p][1] * bw_array[g] * bw_array[g];
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alpha[2] = alpha0[p][0] * bw_array[g];
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alpha[3] = alpha0[p][1] * bw_array[g];
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for (i = 2 * t_env[0]; i < 2 * t_env[bs_num_env]; i++) {
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const int idx = i + ENVELOPE_ADJUSTMENT_OFFSET;
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X_high[k][idx][0] =
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X_low[p][idx - 2][0] * alpha[0] -
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X_low[p][idx - 2][1] * alpha[1] +
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X_low[p][idx - 1][0] * alpha[2] -
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X_low[p][idx - 1][1] * alpha[3] +
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X_low[p][idx][0];
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X_high[k][idx][1] =
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X_low[p][idx - 2][1] * alpha[0] +
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X_low[p][idx - 2][0] * alpha[1] +
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X_low[p][idx - 1][1] * alpha[2] +
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X_low[p][idx - 1][0] * alpha[3] +
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X_low[p][idx][1];
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}
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sbr->dsp.hf_gen(X_high[k] + ENVELOPE_ADJUSTMENT_OFFSET,
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X_low[p] + ENVELOPE_ADJUSTMENT_OFFSET,
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alpha0[p], alpha1[p], bw_array[g],
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2 * t_env[0], 2 * t_env[bs_num_env]);
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}
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}
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if (k < sbr->m[1] + sbr->kx[1])
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@ -1497,7 +1437,8 @@ static void sbr_mapping(AACContext *ac, SpectralBandReplication *sbr,
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static void sbr_env_estimate(float (*e_curr)[48], float X_high[64][40][2],
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SpectralBandReplication *sbr, SBRData *ch_data)
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{
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int e, i, m;
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int e, m;
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int kx1 = sbr->kx[1];
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if (sbr->bs_interpol_freq) {
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for (e = 0; e < ch_data->bs_num_env; e++) {
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@ -1506,12 +1447,7 @@ static void sbr_env_estimate(float (*e_curr)[48], float X_high[64][40][2],
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int iub = ch_data->t_env[e + 1] * 2 + ENVELOPE_ADJUSTMENT_OFFSET;
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for (m = 0; m < sbr->m[1]; m++) {
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float sum = 0.0f;
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for (i = ilb; i < iub; i++) {
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sum += X_high[m + sbr->kx[1]][i][0] * X_high[m + sbr->kx[1]][i][0] +
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X_high[m + sbr->kx[1]][i][1] * X_high[m + sbr->kx[1]][i][1];
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}
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float sum = sbr->dsp.sum_square(X_high[m+kx1] + ilb, iub - ilb);
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e_curr[e][m] = sum * recip_env_size;
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}
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}
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@ -1529,14 +1465,11 @@ static void sbr_env_estimate(float (*e_curr)[48], float X_high[64][40][2],
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const int den = env_size * (table[p + 1] - table[p]);
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for (k = table[p]; k < table[p + 1]; k++) {
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for (i = ilb; i < iub; i++) {
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sum += X_high[k][i][0] * X_high[k][i][0] +
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X_high[k][i][1] * X_high[k][i][1];
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}
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sum += sbr->dsp.sum_square(X_high[k] + ilb, iub - ilb);
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}
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sum /= den;
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for (k = table[p]; k < table[p + 1]; k++) {
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e_curr[e][k - sbr->kx[1]] = sum;
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e_curr[e][k - kx1] = sum;
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}
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}
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}
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@ -1647,55 +1580,34 @@ static void sbr_hf_assemble(float Y[2][38][64][2], const float X_high[64][40][2]
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for (e = 0; e < ch_data->bs_num_env; e++) {
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for (i = 2 * ch_data->t_env[e]; i < 2 * ch_data->t_env[e + 1]; i++) {
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int phi_sign = (1 - 2*(kx & 1));
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float g_filt_tab[48], *g_filt;
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float q_filt_tab[48], *q_filt;
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if (h_SL && e != e_a[0] && e != e_a[1]) {
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g_filt = g_filt_tab;
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q_filt = q_filt_tab;
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for (m = 0; m < m_max; m++) {
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const int idx1 = i + h_SL;
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float g_filt = 0.0f;
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for (j = 0; j <= h_SL; j++)
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g_filt += g_temp[idx1 - j][m] * h_smooth[j];
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Y[1][i][m + kx][0] =
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X_high[m + kx][i + ENVELOPE_ADJUSTMENT_OFFSET][0] * g_filt;
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Y[1][i][m + kx][1] =
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X_high[m + kx][i + ENVELOPE_ADJUSTMENT_OFFSET][1] * g_filt;
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g_filt[m] = 0.0f;
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q_filt[m] = 0.0f;
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for (j = 0; j <= h_SL; j++) {
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g_filt[m] += g_temp[idx1 - j][m] * h_smooth[j];
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q_filt[m] += q_temp[idx1 - j][m] * h_smooth[j];
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}
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}
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} else {
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for (m = 0; m < m_max; m++) {
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const float g_filt = g_temp[i + h_SL][m];
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Y[1][i][m + kx][0] =
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X_high[m + kx][i + ENVELOPE_ADJUSTMENT_OFFSET][0] * g_filt;
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Y[1][i][m + kx][1] =
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X_high[m + kx][i + ENVELOPE_ADJUSTMENT_OFFSET][1] * g_filt;
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}
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g_filt = g_temp[i + h_SL];
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q_filt = q_temp[i];
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}
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sbr->dsp.hf_g_filt(Y[1][i] + kx, X_high + kx, g_filt, m_max,
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i + ENVELOPE_ADJUSTMENT_OFFSET);
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if (e != e_a[0] && e != e_a[1]) {
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for (m = 0; m < m_max; m++) {
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indexnoise = (indexnoise + 1) & 0x1ff;
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if (sbr->s_m[e][m]) {
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Y[1][i][m + kx][0] +=
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sbr->s_m[e][m] * phi[0][indexsine];
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Y[1][i][m + kx][1] +=
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sbr->s_m[e][m] * (phi[1][indexsine] * phi_sign);
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} else {
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float q_filt;
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if (h_SL) {
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const int idx1 = i + h_SL;
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q_filt = 0.0f;
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for (j = 0; j <= h_SL; j++)
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q_filt += q_temp[idx1 - j][m] * h_smooth[j];
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} else {
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q_filt = q_temp[i][m];
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}
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Y[1][i][m + kx][0] +=
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q_filt * sbr_noise_table[indexnoise][0];
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Y[1][i][m + kx][1] +=
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q_filt * sbr_noise_table[indexnoise][1];
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}
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phi_sign = -phi_sign;
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}
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sbr->dsp.hf_apply_noise[indexsine](Y[1][i] + kx, sbr->s_m[e],
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q_filt, indexnoise,
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kx, m_max);
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} else {
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indexnoise = (indexnoise + m_max) & 0x1ff;
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for (m = 0; m < m_max; m++) {
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Y[1][i][m + kx][0] +=
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sbr->s_m[e][m] * phi[0][indexsine];
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@ -1704,6 +1616,7 @@ static void sbr_hf_assemble(float Y[2][38][64][2], const float X_high[64][40][2]
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phi_sign = -phi_sign;
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}
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}
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indexnoise = (indexnoise + m_max) & 0x1ff;
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indexsine = (indexsine + 1) & 3;
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}
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}
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@ -1723,12 +1636,12 @@ void ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int id_aac,
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}
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for (ch = 0; ch < nch; ch++) {
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/* decode channel */
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sbr_qmf_analysis(&ac->dsp, &sbr->mdct_ana, ch ? R : L, sbr->data[ch].analysis_filterbank_samples,
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sbr_qmf_analysis(&ac->dsp, &sbr->mdct_ana, &sbr->dsp, ch ? R : L, sbr->data[ch].analysis_filterbank_samples,
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(float*)sbr->qmf_filter_scratch,
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sbr->data[ch].W);
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sbr_lf_gen(ac, sbr, sbr->X_low, sbr->data[ch].W);
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if (sbr->start) {
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sbr_hf_inverse_filter(sbr->alpha0, sbr->alpha1, sbr->X_low, sbr->k[0]);
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sbr_hf_inverse_filter(&sbr->dsp, sbr->alpha0, sbr->alpha1, sbr->X_low, sbr->k[0]);
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sbr_chirp(sbr, &sbr->data[ch]);
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sbr_hf_gen(ac, sbr, sbr->X_high, sbr->X_low, sbr->alpha0, sbr->alpha1,
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sbr->data[ch].bw_array, sbr->data[ch].t_env,
|
||||
@ -1755,12 +1668,12 @@ void ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int id_aac,
|
||||
nch = 2;
|
||||
}
|
||||
|
||||
sbr_qmf_synthesis(&ac->dsp, &sbr->mdct, L, sbr->X[0], sbr->qmf_filter_scratch,
|
||||
sbr_qmf_synthesis(&ac->dsp, &sbr->mdct, &sbr->dsp, L, sbr->X[0], sbr->qmf_filter_scratch,
|
||||
sbr->data[0].synthesis_filterbank_samples,
|
||||
&sbr->data[0].synthesis_filterbank_samples_offset,
|
||||
downsampled);
|
||||
if (nch == 2)
|
||||
sbr_qmf_synthesis(&ac->dsp, &sbr->mdct, R, sbr->X[1], sbr->qmf_filter_scratch,
|
||||
sbr_qmf_synthesis(&ac->dsp, &sbr->mdct, &sbr->dsp, R, sbr->X[1], sbr->qmf_filter_scratch,
|
||||
sbr->data[1].synthesis_filterbank_samples,
|
||||
&sbr->data[1].synthesis_filterbank_samples_offset,
|
||||
downsampled);
|
||||
|
||||
@ -352,7 +352,7 @@ static DECLARE_ALIGNED(16, float, sbr_qmf_window_us)[640] = {
|
||||
0.8537385600,
|
||||
};
|
||||
|
||||
static const float sbr_noise_table[512][2] = {
|
||||
const float ff_sbr_noise_table[512][2] = {
|
||||
{-0.99948153278296, -0.59483417516607}, { 0.97113454393991, -0.67528515225647},
|
||||
{ 0.14130051758487, -0.95090983575689}, {-0.47005496701697, -0.37340549728647},
|
||||
{ 0.80705063769351, 0.29653668284408}, {-0.38981478896926, 0.89572605717087},
|
||||
|
||||
@ -32,6 +32,7 @@
|
||||
#include <stdint.h>
|
||||
#include "fft.h"
|
||||
#include "aacps.h"
|
||||
#include "sbrdsp.h"
|
||||
|
||||
/**
|
||||
* Spectral Band Replication header - spectrum parameters that invoke a reset if they differ from the previous header.
|
||||
@ -180,6 +181,7 @@ typedef struct {
|
||||
DECLARE_ALIGNED(16, float, qmf_filter_scratch)[5][64];
|
||||
FFTContext mdct_ana;
|
||||
FFTContext mdct;
|
||||
SBRDSPContext dsp;
|
||||
} SpectralBandReplication;
|
||||
|
||||
#endif /* AVCODEC_SBR_H */
|
||||
|
||||
237
libavcodec/sbrdsp.c
Normal file
237
libavcodec/sbrdsp.c
Normal file
@ -0,0 +1,237 @@
|
||||
/*
|
||||
* AAC Spectral Band Replication decoding functions
|
||||
* Copyright (c) 2008-2009 Robert Swain ( rob opendot cl )
|
||||
* Copyright (c) 2009-2010 Alex Converse <alex.converse@gmail.com>
|
||||
*
|
||||
* This file is part of Libav.
|
||||
*
|
||||
* Libav is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* Libav is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with Libav; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#include "libavutil/attributes.h"
|
||||
#include "sbrdsp.h"
|
||||
|
||||
static void sbr_sum64x5_c(float *z)
|
||||
{
|
||||
int k;
|
||||
for (k = 0; k < 64; k++) {
|
||||
float f = z[k] + z[k + 64] + z[k + 128] + z[k + 192] + z[k + 256];
|
||||
z[k] = f;
|
||||
}
|
||||
}
|
||||
|
||||
static float sbr_sum_square_c(float (*x)[2], int n)
|
||||
{
|
||||
float sum = 0.0f;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < n; i++)
|
||||
sum += x[i][0] * x[i][0] + x[i][1] * x[i][1];
|
||||
|
||||
return sum;
|
||||
}
|
||||
|
||||
static void sbr_neg_odd_64_c(float *x)
|
||||
{
|
||||
int i;
|
||||
for (i = 1; i < 64; i += 2)
|
||||
x[i] = -x[i];
|
||||
}
|
||||
|
||||
static void sbr_qmf_pre_shuffle_c(float *z)
|
||||
{
|
||||
int k;
|
||||
z[64] = z[0];
|
||||
z[65] = z[1];
|
||||
for (k = 1; k < 32; k++) {
|
||||
z[64+2*k ] = -z[64 - k];
|
||||
z[64+2*k+1] = z[ k + 1];
|
||||
}
|
||||
}
|
||||
|
||||
static void sbr_qmf_post_shuffle_c(float W[32][2], const float *z)
|
||||
{
|
||||
int k;
|
||||
for (k = 0; k < 32; k++) {
|
||||
W[k][0] = -z[63-k];
|
||||
W[k][1] = z[k];
|
||||
}
|
||||
}
|
||||
|
||||
static void sbr_qmf_deint_neg_c(float *v, const float *src)
|
||||
{
|
||||
int i;
|
||||
for (i = 0; i < 32; i++) {
|
||||
v[ i] = src[63 - 2*i ];
|
||||
v[63 - i] = -src[63 - 2*i - 1];
|
||||
}
|
||||
}
|
||||
|
||||
static void sbr_qmf_deint_bfly_c(float *v, const float *src0, const float *src1)
|
||||
{
|
||||
int i;
|
||||
for (i = 0; i < 64; i++) {
|
||||
v[ i] = src0[i] - src1[63 - i];
|
||||
v[127 - i] = src0[i] + src1[63 - i];
|
||||
}
|
||||
}
|
||||
|
||||
static av_always_inline void autocorrelate(const float x[40][2],
|
||||
float phi[3][2][2], int lag)
|
||||
{
|
||||
int i;
|
||||
float real_sum = 0.0f;
|
||||
float imag_sum = 0.0f;
|
||||
if (lag) {
|
||||
for (i = 1; i < 38; i++) {
|
||||
real_sum += x[i][0] * x[i+lag][0] + x[i][1] * x[i+lag][1];
|
||||
imag_sum += x[i][0] * x[i+lag][1] - x[i][1] * x[i+lag][0];
|
||||
}
|
||||
phi[2-lag][1][0] = real_sum + x[ 0][0] * x[lag][0] + x[ 0][1] * x[lag][1];
|
||||
phi[2-lag][1][1] = imag_sum + x[ 0][0] * x[lag][1] - x[ 0][1] * x[lag][0];
|
||||
if (lag == 1) {
|
||||
phi[0][0][0] = real_sum + x[38][0] * x[39][0] + x[38][1] * x[39][1];
|
||||
phi[0][0][1] = imag_sum + x[38][0] * x[39][1] - x[38][1] * x[39][0];
|
||||
}
|
||||
} else {
|
||||
for (i = 1; i < 38; i++) {
|
||||
real_sum += x[i][0] * x[i][0] + x[i][1] * x[i][1];
|
||||
}
|
||||
phi[2][1][0] = real_sum + x[ 0][0] * x[ 0][0] + x[ 0][1] * x[ 0][1];
|
||||
phi[1][0][0] = real_sum + x[38][0] * x[38][0] + x[38][1] * x[38][1];
|
||||
}
|
||||
}
|
||||
|
||||
static void sbr_autocorrelate_c(const float x[40][2], float phi[3][2][2])
|
||||
{
|
||||
autocorrelate(x, phi, 0);
|
||||
autocorrelate(x, phi, 1);
|
||||
autocorrelate(x, phi, 2);
|
||||
}
|
||||
|
||||
static void sbr_hf_gen_c(float (*X_high)[2], const float (*X_low)[2],
|
||||
const float alpha0[2], const float alpha1[2],
|
||||
float bw, int start, int end)
|
||||
{
|
||||
float alpha[4];
|
||||
int i;
|
||||
|
||||
alpha[0] = alpha1[0] * bw * bw;
|
||||
alpha[1] = alpha1[1] * bw * bw;
|
||||
alpha[2] = alpha0[0] * bw;
|
||||
alpha[3] = alpha0[1] * bw;
|
||||
|
||||
for (i = start; i < end; i++) {
|
||||
X_high[i][0] =
|
||||
X_low[i - 2][0] * alpha[0] -
|
||||
X_low[i - 2][1] * alpha[1] +
|
||||
X_low[i - 1][0] * alpha[2] -
|
||||
X_low[i - 1][1] * alpha[3] +
|
||||
X_low[i][0];
|
||||
X_high[i][1] =
|
||||
X_low[i - 2][1] * alpha[0] +
|
||||
X_low[i - 2][0] * alpha[1] +
|
||||
X_low[i - 1][1] * alpha[2] +
|
||||
X_low[i - 1][0] * alpha[3] +
|
||||
X_low[i][1];
|
||||
}
|
||||
}
|
||||
|
||||
static void sbr_hf_g_filt_c(float (*Y)[2], const float (*X_high)[40][2],
|
||||
const float *g_filt, int m_max, int ixh)
|
||||
{
|
||||
int m;
|
||||
|
||||
for (m = 0; m < m_max; m++) {
|
||||
Y[m][0] = X_high[m][ixh][0] * g_filt[m];
|
||||
Y[m][1] = X_high[m][ixh][1] * g_filt[m];
|
||||
}
|
||||
}
|
||||
|
||||
static av_always_inline void sbr_hf_apply_noise(float (*Y)[2],
|
||||
const float *s_m,
|
||||
const float *q_filt,
|
||||
int noise,
|
||||
float phi_sign0,
|
||||
float phi_sign1,
|
||||
int m_max)
|
||||
{
|
||||
int m;
|
||||
|
||||
for (m = 0; m < m_max; m++) {
|
||||
float y0 = Y[m][0];
|
||||
float y1 = Y[m][1];
|
||||
noise = (noise + 1) & 0x1ff;
|
||||
if (s_m[m]) {
|
||||
y0 += s_m[m] * phi_sign0;
|
||||
y1 += s_m[m] * phi_sign1;
|
||||
} else {
|
||||
y0 += q_filt[m] * ff_sbr_noise_table[noise][0];
|
||||
y1 += q_filt[m] * ff_sbr_noise_table[noise][1];
|
||||
}
|
||||
Y[m][0] = y0;
|
||||
Y[m][1] = y1;
|
||||
phi_sign1 = -phi_sign1;
|
||||
}
|
||||
}
|
||||
|
||||
static void sbr_hf_apply_noise_0(float (*Y)[2], const float *s_m,
|
||||
const float *q_filt, int noise,
|
||||
int kx, int m_max)
|
||||
{
|
||||
sbr_hf_apply_noise(Y, s_m, q_filt, noise, 1.0, 0.0, m_max);
|
||||
}
|
||||
|
||||
static void sbr_hf_apply_noise_1(float (*Y)[2], const float *s_m,
|
||||
const float *q_filt, int noise,
|
||||
int kx, int m_max)
|
||||
{
|
||||
float phi_sign = 1 - 2 * (kx & 1);
|
||||
sbr_hf_apply_noise(Y, s_m, q_filt, noise, 0.0, phi_sign, m_max);
|
||||
}
|
||||
|
||||
static void sbr_hf_apply_noise_2(float (*Y)[2], const float *s_m,
|
||||
const float *q_filt, int noise,
|
||||
int kx, int m_max)
|
||||
{
|
||||
sbr_hf_apply_noise(Y, s_m, q_filt, noise, -1.0, 0.0, m_max);
|
||||
}
|
||||
|
||||
static void sbr_hf_apply_noise_3(float (*Y)[2], const float *s_m,
|
||||
const float *q_filt, int noise,
|
||||
int kx, int m_max)
|
||||
{
|
||||
float phi_sign = 1 - 2 * (kx & 1);
|
||||
sbr_hf_apply_noise(Y, s_m, q_filt, noise, 0.0, -phi_sign, m_max);
|
||||
}
|
||||
|
||||
av_cold void ff_sbrdsp_init(SBRDSPContext *s)
|
||||
{
|
||||
s->sum64x5 = sbr_sum64x5_c;
|
||||
s->sum_square = sbr_sum_square_c;
|
||||
s->neg_odd_64 = sbr_neg_odd_64_c;
|
||||
s->qmf_pre_shuffle = sbr_qmf_pre_shuffle_c;
|
||||
s->qmf_post_shuffle = sbr_qmf_post_shuffle_c;
|
||||
s->qmf_deint_neg = sbr_qmf_deint_neg_c;
|
||||
s->qmf_deint_bfly = sbr_qmf_deint_bfly_c;
|
||||
s->autocorrelate = sbr_autocorrelate_c;
|
||||
s->hf_gen = sbr_hf_gen_c;
|
||||
s->hf_g_filt = sbr_hf_g_filt_c;
|
||||
|
||||
s->hf_apply_noise[0] = sbr_hf_apply_noise_0;
|
||||
s->hf_apply_noise[1] = sbr_hf_apply_noise_1;
|
||||
s->hf_apply_noise[2] = sbr_hf_apply_noise_2;
|
||||
s->hf_apply_noise[3] = sbr_hf_apply_noise_3;
|
||||
}
|
||||
47
libavcodec/sbrdsp.h
Normal file
47
libavcodec/sbrdsp.h
Normal file
@ -0,0 +1,47 @@
|
||||
/*
|
||||
* Copyright (c) 2012 Mans Rullgard
|
||||
*
|
||||
* This file is part of Libav.
|
||||
*
|
||||
* Libav is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* Libav is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with Libav; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#ifndef LIBAVCODEC_SBRDSP_H
|
||||
#define LIBAVCODEC_SBRDSP_H
|
||||
|
||||
typedef struct SBRDSPContext {
|
||||
void (*sum64x5)(float *z);
|
||||
float (*sum_square)(float (*x)[2], int n);
|
||||
void (*neg_odd_64)(float *x);
|
||||
void (*qmf_pre_shuffle)(float *z);
|
||||
void (*qmf_post_shuffle)(float W[32][2], const float *z);
|
||||
void (*qmf_deint_neg)(float *v, const float *src);
|
||||
void (*qmf_deint_bfly)(float *v, const float *src0, const float *src1);
|
||||
void (*autocorrelate)(const float x[40][2], float phi[3][2][2]);
|
||||
void (*hf_gen)(float (*X_high)[2], const float (*X_low)[2],
|
||||
const float alpha0[2], const float alpha1[2],
|
||||
float bw, int start, int end);
|
||||
void (*hf_g_filt)(float (*Y)[2], const float (*X_high)[40][2],
|
||||
const float *g_filt, int m_max, int ixh);
|
||||
void (*hf_apply_noise[4])(float (*Y)[2], const float *s_m,
|
||||
const float *q_filt, int noise,
|
||||
int kx, int m_max);
|
||||
} SBRDSPContext;
|
||||
|
||||
extern const float ff_sbr_noise_table[][2];
|
||||
|
||||
void ff_sbrdsp_init(SBRDSPContext *s);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user