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Code Issues Releases Activity

avfilter/vf_tonemap: add slice threading

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This commit is contained in:
Paul B Mahol 2019-04-30 11:59:51 +02:00
parent a7fa89fa0b
commit d3d1d5936f
1 changed files with 34 additions and 5 deletions
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39
libavfilter/vf_tonemap.c
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@ -191,10 +191,36 @@ static void tonemap(TonemapContext *s, AVFrame *out, const AVFrame *in,
*b_out *= sig / sig_orig;
}
typedef struct ThreadData {
AVFrame *in, *out;
const AVPixFmtDescriptor *desc;
double peak;
} ThreadData;
static int tonemap_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
{
TonemapContext *s = ctx->priv;
ThreadData *td = arg;
AVFrame *in = td->in;
AVFrame *out = td->out;
const AVPixFmtDescriptor *desc = td->desc;
const int slice_start = (in->height * jobnr) / nb_jobs;
const int slice_end = (in->height * (jobnr+1)) / nb_jobs;
double peak = td->peak;
for (int y = slice_start; y < slice_end; y++)
for (int x = 0; x < out->width; x++)
tonemap(s, out, in, desc, x, y, peak);
return 0;
}
static int filter_frame(AVFilterLink *link, AVFrame *in)
{
TonemapContext *s = link->dst->priv;
AVFilterLink *outlink = link->dst->outputs[0];
AVFilterContext *ctx = link->dst;
TonemapContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
ThreadData td;
AVFrame *out;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(link->format);
const AVPixFmtDescriptor *odesc = av_pix_fmt_desc_get(outlink->format);
@ -245,9 +271,11 @@ static int filter_frame(AVFilterLink *link, AVFrame *in)
}
/* do the tone map */
for (y = 0; y < out->height; y++)
for (x = 0; x < out->width; x++)
tonemap(s, out, in, desc, x, y, peak);
td.out = out;
td.in = in;
td.desc = desc;
td.peak = peak;
ctx->internal->execute(ctx, tonemap_slice, &td, NULL, FFMIN(in->height, ff_filter_get_nb_threads(ctx)));
/* copy/generate alpha if needed */
if (desc->flags & AV_PIX_FMT_FLAG_ALPHA && odesc->flags & AV_PIX_FMT_FLAG_ALPHA) {
@ -315,4 +343,5 @@ AVFilter ff_vf_tonemap = {
.priv_class = &tonemap_class,
.inputs = tonemap_inputs,
.outputs = tonemap_outputs,
.flags = AVFILTER_FLAG_SLICE_THREADS,
};