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Code Issues Releases Activity

avfilter/vf_premultiply: add planes option

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-04-23 18:19:40 +02:00
parent 9d1f9ba582
commit 710c97d5f6
2 changed files with 20 additions and 1 deletions
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8
doc/filters.texi
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@ -11077,6 +11077,14 @@ of second stream as alpha.
Both streams must have same dimensions and same pixel format.
The filter accepts the following option:
@table @option
@item planes
Set which planes will be processed, unprocessed planes will be copied.
By default value 0xf, all planes will be processed.
@end table
@section prewitt
Apply prewitt operator to input video stream.

13
libavfilter/vf_premultiply.c
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@ -30,6 +30,7 @@
typedef struct PreMultiplyContext {
const AVClass *class;
int width[4], height[4];
int linesize[4];
int nb_planes;
int planes;
int half, depth, offset;
@ -47,6 +48,7 @@ typedef struct PreMultiplyContext {
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption premultiply_options[] = {
{ "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
{ NULL }
};
@ -269,6 +271,12 @@ static int process_frame(FFFrameSync *fs)
}
for (p = 0; p < s->nb_planes; p++) {
if (!((1 << p) & s->planes)) {
av_image_copy_plane(out->data[p], out->linesize[p], base->data[p], base->linesize[p],
s->linesize[p], s->height[p]);
continue;
}
s->premultiply[p](base->data[p], alpha->data[0],
out->data[p],
base->linesize[p], alpha->linesize[0],
@ -287,10 +295,13 @@ static int config_input(AVFilterLink *inlink)
AVFilterContext *ctx = inlink->dst;
PreMultiplyContext *s = ctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int vsub, hsub;
int vsub, hsub, ret;
s->nb_planes = av_pix_fmt_count_planes(inlink->format);
if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
return ret;
hsub = desc->log2_chroma_w;
vsub = desc->log2_chroma_h;
s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);