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Code Issues Releases Activity

avfilter/avf_showcwt: optimize multiplication with kernel

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This commit is contained in:
Paul B Mahol 2023-07-10 12:08:13 +02:00
parent 587189cdb9
commit 2f2f76def7
1 changed files with 61 additions and 12 deletions
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73
libavfilter/avf_showcwt.c
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@ -25,6 +25,7 @@
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/float_dsp.h"
#include "libavutil/cpu.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
@ -89,6 +90,9 @@ typedef struct ShowCWTContext {
AVFrame *outpicref;
AVFrame *fft_in;
AVFrame *fft_out;
AVFrame *dst_x;
AVFrame *src_x;
AVFrame *kernel_x;
AVFrame *ifft_in;
AVFrame *ifft_out;
AVFrame *ch_out;
@ -114,6 +118,8 @@ typedef struct ShowCWTContext {
float minimum_frequency;
float maximum_frequency;
float deviation;
AVFloatDSPContext *fdsp;
} ShowCWTContext;
#define OFFSET(x) offsetof(ShowCWTContext, x)
@ -172,6 +178,9 @@ static av_cold void uninit(AVFilterContext *ctx)
av_frame_free(&s->outpicref);
av_frame_free(&s->fft_in);
av_frame_free(&s->fft_out);
av_frame_free(&s->dst_x);
av_frame_free(&s->src_x);
av_frame_free(&s->kernel_x);
av_frame_free(&s->ifft_in);
av_frame_free(&s->ifft_out);
av_frame_free(&s->ch_out);
@ -187,6 +196,8 @@ static av_cold void uninit(AVFilterContext *ctx)
av_tx_uninit(&s->ifft[n]);
av_freep(&s->ifft);
}
av_freep(&s->fdsp);
}
static int query_formats(AVFilterContext *ctx)
@ -483,18 +494,27 @@ static int run_channel_cwt(AVFilterContext *ctx, void *arg, int jobnr, int nb_jo
AVComplexFloat *isrc = (AVComplexFloat *)s->ifft_in->extended_data[y];
AVComplexFloat *idst = (AVComplexFloat *)s->ifft_out->extended_data[y];
AVComplexFloat *chout = ((AVComplexFloat *)s->ch_out->extended_data[ch]) + y * ihop_size;
const float *kernel = (const float *)s->kernel->extended_data[y];
AVComplexFloat *dstx = (AVComplexFloat *)s->dst_x->extended_data[jobnr];
AVComplexFloat *srcx = (AVComplexFloat *)s->src_x->extended_data[jobnr];
AVComplexFloat *kernelx = (AVComplexFloat *)s->kernel_x->extended_data[jobnr];
const AVComplexFloat *kernel = (const AVComplexFloat *)s->kernel->extended_data[y];
const unsigned *index = (const unsigned *)s->index;
const int kernel_start = s->kernel_start[y];
const int kernel_stop = s->kernel_stop[y];
const int kernel_range = kernel_stop - kernel_start;
memcpy(kernelx, kernel + kernel_start, sizeof(*kernel) * kernel_range);
memcpy(srcx, dst + kernel_start, sizeof(*dst) * kernel_range);
s->fdsp->vector_fmul((float *)dstx, (const float *)srcx,
(const float *)kernelx, FFALIGN(kernel_range * 2, 16));
memset(isrc, 0, sizeof(*isrc) * output_sample_count);
for (int i = kernel_start; i < kernel_stop; i++) {
const unsigned n = index[i];
const float ff = kernel[i];
for (int i = 0; i < kernel_range; i++) {
const unsigned n = index[i + kernel_start];
isrc[n].re += ff * dst[i].re;
isrc[n].im += ff * dst[i].im;
isrc[n].re += dstx[i].re;
isrc[n].im += dstx[i].im;
}
s->itx_fn(s->ifft[jobnr], idst, isrc, sizeof(*isrc));
@ -515,7 +535,7 @@ static void compute_kernel(AVFilterContext *ctx)
unsigned *index = s->index;
for (int y = 0; y < fsize; y++) {
float *kernel = (float *)s->kernel->extended_data[y];
AVComplexFloat *kernel = (AVComplexFloat *)s->kernel->extended_data[y];
int *kernel_start = s->kernel_start;
int *kernel_stop = s->kernel_stop;
float frequency = s->frequency_band[y*2];
@ -527,18 +547,19 @@ static void compute_kernel(AVFilterContext *ctx)
f = size - fabsf(f - size);
ff = expf(-f*f*deviation) * scale_factor;
kernel[n] = ff;
kernel[n].re = ff;
kernel[n].im = ff;
}
for (int n = 0; n < size; n++) {
if (kernel[n] != 0.f) {
if (kernel[n].re != 0.f) {
kernel_start[y] = n;
break;
}
}
for (int n = 0; n < size; n++) {
if (kernel[size - n - 1] != 0.f) {
if (kernel[size - n - 1].re != 0.f) {
kernel_stop[y] = size - n;
break;
}
@ -561,6 +582,10 @@ static int config_output(AVFilterLink *outlink)
uninit(ctx);
s->fdsp = avpriv_float_dsp_alloc(0);
if (!s->fdsp)
return AVERROR(ENOMEM);
switch (s->direction) {
case DIRECTION_LR:
case DIRECTION_RL:
@ -622,6 +647,9 @@ static int config_output(AVFilterLink *outlink)
s->outpicref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
s->fft_in = ff_get_audio_buffer(inlink, s->fft_in_size * 2);
s->fft_out = ff_get_audio_buffer(inlink, s->fft_out_size * 2);
s->dst_x = av_frame_alloc();
s->src_x = av_frame_alloc();
s->kernel_x = av_frame_alloc();
s->cache = ff_get_audio_buffer(inlink, s->fft_in_size * 2);
s->ch_out = ff_get_audio_buffer(inlink, s->frequency_band_count * 2 * s->ihop_size);
s->ifft_in = av_frame_alloc();
@ -630,7 +658,7 @@ static int config_output(AVFilterLink *outlink)
s->index = av_calloc(s->input_padding_size, sizeof(*s->index));
s->kernel_start = av_calloc(s->frequency_band_count, sizeof(*s->kernel_start));
s->kernel_stop = av_calloc(s->frequency_band_count, sizeof(*s->kernel_stop));
if (!s->outpicref || !s->fft_in || !s->fft_out ||
if (!s->outpicref || !s->fft_in || !s->fft_out || !s->src_x || !s->dst_x || !s->kernel_x ||
!s->ifft_in || !s->ifft_out || !s->kernel_start || !s->kernel_stop ||
!s->frequency_band || !s->kernel || !s->cache || !s->index)
return AVERROR(ENOMEM);
@ -650,12 +678,33 @@ static int config_output(AVFilterLink *outlink)
return ret;
s->kernel->format = inlink->format;
s->kernel->nb_samples = s->input_padding_size;
s->kernel->nb_samples = s->input_padding_size * 2;
s->kernel->ch_layout.nb_channels = s->frequency_band_count;
ret = av_frame_get_buffer(s->kernel, 0);
if (ret < 0)
return ret;
s->src_x->format = inlink->format;
s->src_x->nb_samples = s->fft_out_size * 2;
s->src_x->ch_layout.nb_channels = s->nb_threads;
ret = av_frame_get_buffer(s->src_x, 0);
if (ret < 0)
return ret;
s->dst_x->format = inlink->format;
s->dst_x->nb_samples = s->fft_out_size * 2;
s->dst_x->ch_layout.nb_channels = s->nb_threads;
ret = av_frame_get_buffer(s->dst_x, 0);
if (ret < 0)
return ret;
s->kernel_x->format = inlink->format;
s->kernel_x->nb_samples = s->fft_out_size * 2;
s->kernel_x->ch_layout.nb_channels = s->nb_threads;
ret = av_frame_get_buffer(s->kernel_x, 0);
if (ret < 0)
return ret;
s->outpicref->sample_aspect_ratio = (AVRational){1,1};
for (int y = 0; y < outlink->h; y++) {