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Code Issues Releases Activity

avfilter/vf_setparams: add alpha_mode parameter

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This commit is contained in:
Niklas Haas
2025-02-19 21:26:54 +01:00
parent e6ab7fe582
commit dc02514f6b
2 changed files with 32 additions and 0 deletions
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13
doc/filters.texi
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@@ -21758,6 +21758,19 @@ Keep the same chroma location (default).
@item bottomleft @item bottomleft
@item bottom @item bottom
@end table @end table
@item alpha_mode
Set the alpha moda.
Available values are:
@table @samp
@item auto
Keep the same alpha mode (default).
@item unspecified, unknown
@item premultiplied
@item straight
@end table
@end table @end table
@section shear @section shear

19
libavfilter/vf_setparams.c
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@@ -42,6 +42,7 @@ typedef struct SetParamsContext {
int color_trc; int color_trc;
int colorspace; int colorspace;
int chroma_location; int chroma_location;
int alpha_mode;
} SetParamsContext; } SetParamsContext;
#define OFFSET(x) offsetof(SetParamsContext, x) #define OFFSET(x) offsetof(SetParamsContext, x)
@@ -131,6 +132,13 @@ static const AVOption setparams_options[] = {
{"top", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_TOP}, 0, 0, FLAGS, .unit = "chroma_location"}, {"top", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_TOP}, 0, 0, FLAGS, .unit = "chroma_location"},
{"bottomleft", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_BOTTOMLEFT}, 0, 0, FLAGS, .unit = "chroma_location"}, {"bottomleft", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_BOTTOMLEFT}, 0, 0, FLAGS, .unit = "chroma_location"},
{"bottom", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_BOTTOM}, 0, 0, FLAGS, .unit = "chroma_location"}, {"bottom", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCHROMA_LOC_BOTTOM}, 0, 0, FLAGS, .unit = "chroma_location"},
{"alpha_mode", "select alpha moda", OFFSET(alpha_mode), AV_OPT_TYPE_INT, {.i64=-1}, -1, AVALPHA_MODE_NB-1, FLAGS, .unit = "alpha_mode"},
{"auto", "keep the same alpha mode", 0, AV_OPT_TYPE_CONST, {.i64=-1}, 0, 0, FLAGS, .unit = "alpha_mode"},
{"unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVALPHA_MODE_UNSPECIFIED}, 0, 0, FLAGS, .unit = "alpha_mode"},
{"unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVALPHA_MODE_UNSPECIFIED}, 0, 0, FLAGS, .unit = "alpha_mode"},
{"premultiplied", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVALPHA_MODE_PREMULTIPLIED}, 0, 0, FLAGS, .unit = "alpha_mode"},
{"straight", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVALPHA_MODE_STRAIGHT}, 0, 0, FLAGS, .unit = "alpha_mode"},
{NULL} {NULL}
}; };
@@ -157,6 +165,13 @@ static int query_formats(const AVFilterContext *ctx,
return ret; return ret;
} }
if (s->alpha_mode >= 0) {
ret = ff_formats_ref(ff_make_formats_list_singleton(s->alpha_mode),
&cfg_out[0]->alpha_modes);
if (ret < 0)
return ret;
}
return 0; return 0;
} }
@@ -187,6 +202,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
frame->colorspace = s->colorspace; frame->colorspace = s->colorspace;
if (s->chroma_location >= 0) if (s->chroma_location >= 0)
frame->chroma_location = s->chroma_location; frame->chroma_location = s->chroma_location;
if (s->alpha_mode >= 0)
frame->alpha_mode = s->alpha_mode;
return ff_filter_frame(ctx->outputs[0], frame); return ff_filter_frame(ctx->outputs[0], frame);
} }
@@ -237,6 +254,7 @@ static av_cold int init_setrange(AVFilterContext *ctx)
s->color_trc = -1; s->color_trc = -1;
s->colorspace = -1; s->colorspace = -1;
s->chroma_location = -1; s->chroma_location = -1;
s->alpha_mode = -1;
return 0; return 0;
} }
@@ -274,6 +292,7 @@ static av_cold int init_setfield(AVFilterContext *ctx)
s->color_trc = -1; s->color_trc = -1;
s->colorspace = -1; s->colorspace = -1;
s->chroma_location = -1; s->chroma_location = -1;
s->alpha_mode = -1;
return 0; return 0;
} }