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avfilter/vf_lut: add support for commands

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While here remove excessive log and uninit() call in negate_init().
This commit is contained in:
Paul B Mahol 2021-02-08 16:31:21 +01:00
parent dd01165f19
commit a00ff56321
2 changed files with 25 additions and 9 deletions
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8
doc/filters.texi
View File

@ -14114,6 +14114,10 @@ expression
All expressions default to "val".
@subsection Commands
This filter supports same @ref{commands} as options.
@subsection Examples
@itemize
@ -14776,6 +14780,10 @@ It accepts the following option:
With value 1, it negates the alpha component, if present. Default value is 0.
@end table
@subsection Commands
This filter supports same @ref{commands} as options.
@anchor{nlmeans}
@section nlmeans

26
libavfilter/vf_lut.c
View File

@ -81,7 +81,7 @@ typedef struct LutContext {
#define A 3
#define OFFSET(x) offsetof(LutContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption options[] = {
{ "c0", "set component #0 expression", OFFSET(comp_expr_str[0]), AV_OPT_TYPE_STRING, { .str = "clipval" }, .flags = FLAGS },
@ -566,6 +566,17 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
return ff_filter_frame(outlink, out);
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
int ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
if (ret < 0)
return ret;
return config_props(ctx->inputs[0]);
}
static const AVFilterPad inputs[] = {
{ .name = "default",
.type = AVMEDIA_TYPE_VIDEO,
@ -592,7 +603,9 @@ static const AVFilterPad outputs[] = {
.query_formats = query_formats, \
.inputs = inputs, \
.outputs = outputs, \
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS, \
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | \
AVFILTER_FLAG_SLICE_THREADS, \
.process_command = process_command, \
}
#if CONFIG_LUT_FILTER
@ -654,17 +667,12 @@ AVFILTER_DEFINE_CLASS(negate);
static av_cold int negate_init(AVFilterContext *ctx)
{
LutContext *s = ctx->priv;
int i;
av_log(ctx, AV_LOG_DEBUG, "negate_alpha:%d\n", s->negate_alpha);
for (i = 0; i < 4; i++) {
for (int i = 0; i < 4; i++) {
s->comp_expr_str[i] = av_strdup((i == 3 && !s->negate_alpha) ?
"val" : "negval");
if (!s->comp_expr_str[i]) {
uninit(ctx);
if (!s->comp_expr_str[i])
return AVERROR(ENOMEM);
}
}
return 0;