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avfilter/vf_convolve: add threading for complex multiplication

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-12-25 15:46:04 +01:00
parent c59e49f9b2
commit e712d30173
1 changed files with 32 additions and 14 deletions
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46
libavfilter/vf_convolve.c
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@ -377,6 +377,35 @@ static void get_output(ConvolveContext *s, AVFrame *out,
}
}
static int complex_multiply(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
ThreadData *td = arg;
FFTComplex *input = td->hdata;
FFTComplex *filter = td->vdata;
const int n = td->n;
int start = (n * jobnr ) / nb_jobs;
int end = (n * (jobnr+1)) / nb_jobs;
int y, x;
for (y = start; y < end; y++) {
int yn = y * n;
for (x = 0; x < n; x++) {
FFTSample re, im, ire, iim;
re = input[yn + x].re;
im = input[yn + x].im;
ire = filter[yn + x].re;
iim = filter[yn + x].im;
input[yn + x].re = ire * re - iim * im;
input[yn + x].im = iim * re + ire * im;
}
}
return 0;
}
static int do_convolve(FFFrameSync *fs)
{
AVFilterContext *ctx = fs->parent;
@ -442,21 +471,10 @@ static int do_convolve(FFFrameSync *fs)
s->got_impulse[plane] = 1;
}
for (y = 0; y < n; y++) {
int yn = y * n;
td.hdata = input;
td.vdata = filter;
for (x = 0; x < n; x++) {
FFTSample re, im, ire, iim;
re = input[yn + x].re;
im = input[yn + x].im;
ire = filter[yn + x].re;
iim = filter[yn + x].im;
input[yn + x].re = ire * re - iim * im;
input[yn + x].im = iim * re + ire * im;
}
}
ctx->internal->execute(ctx, complex_multiply, &td, NULL, FFMIN3(MAX_THREADS, n, ff_filter_get_nb_threads(ctx)));
td.hdata = s->fft_hdata[plane];
td.vdata = s->fft_vdata[plane];