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avfilter/vf_colorchannelmixer: add support for commands

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This commit is contained in:
Paul B Mahol 2019-10-08 21:54:30 +02:00
parent 953b1c7b12
commit 4568e54cc5
1 changed files with 23 additions and 8 deletions
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31
libavfilter/vf_colorchannelmixer.c
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@ -52,7 +52,8 @@ typedef struct ColorChannelMixerContext {
} ColorChannelMixerContext;
#define OFFSET(x) offsetof(ColorChannelMixerContext, 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 colorchannelmixer_options[] = {
{ "rr", "set the red gain for the red channel", OFFSET(rr), AV_OPT_TYPE_DOUBLE, {.dbl=1}, -2, 2, FLAGS },
{ "rg", "set the green gain for the red channel", OFFSET(rg), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -2, 2, FLAGS },
@ -408,18 +409,20 @@ static int config_output(AVFilterLink *outlink)
ColorChannelMixerContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
const int depth = desc->comp[0].depth;
int i, j, size, *buffer;
int i, j, size, *buffer = s->buffer;
ff_fill_rgba_map(s->rgba_map, outlink->format);
size = 1 << depth;
s->buffer = buffer = av_malloc(16 * size * sizeof(*s->buffer));
if (!s->buffer)
return AVERROR(ENOMEM);
if (!s->buffer) {
s->buffer = buffer = av_malloc(16 * size * sizeof(*s->buffer));
if (!s->buffer)
return AVERROR(ENOMEM);
for (i = 0; i < 4; i++)
for (j = 0; j < 4; j++, buffer += size)
s->lut[i][j] = buffer;
for (i = 0; i < 4; i++)
for (j = 0; j < 4; j++, buffer += size)
s->lut[i][j] = buffer;
}
for (i = 0; i < size; i++) {
s->lut[R][R][i] = lrint(i * s->rr);
@ -531,6 +534,17 @@ 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_output(ctx->outputs[0]);
}
static av_cold void uninit(AVFilterContext *ctx)
{
ColorChannelMixerContext *s = ctx->priv;
@ -566,4 +580,5 @@ AVFilter ff_vf_colorchannelmixer = {
.inputs = colorchannelmixer_inputs,
.outputs = colorchannelmixer_outputs,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
.process_command = process_command,
};