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avfilter: add link negotiation for AVAlphaMode

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This commit is contained in:
Niklas Haas
2025-08-13 11:27:32 +02:00
parent 8b375b2ffd
commit eea99a77ed
8 changed files with 158 additions and 5 deletions
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32
libavfilter/avfiltergraph.c
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@@ -303,7 +303,8 @@ static int filter_link_check_formats(void *log, AVFilterLink *link, AVFilterForm
case AVMEDIA_TYPE_VIDEO:
if ((ret = ff_formats_check_pixel_formats(log, cfg->formats)) < 0 ||
(ret = ff_formats_check_color_spaces(log, cfg->color_spaces)) < 0 ||
(ret = ff_formats_check_color_ranges(log, cfg->color_ranges)) < 0)
(ret = ff_formats_check_color_ranges(log, cfg->color_ranges)) < 0 ||
(ret = ff_formats_check_alpha_modes(log, cfg->alpha_modes)) < 0)
return ret;
break;
@@ -418,7 +419,8 @@ static int formats_declared(AVFilterContext *f)
return 0;
if (f->inputs[i]->type == AVMEDIA_TYPE_VIDEO &&
!(f->inputs[i]->outcfg.color_ranges &&
f->inputs[i]->outcfg.color_spaces))
f->inputs[i]->outcfg.color_spaces &&
f->inputs[i]->outcfg.alpha_modes))
return 0;
if (f->inputs[i]->type == AVMEDIA_TYPE_AUDIO &&
!(f->inputs[i]->outcfg.samplerates &&
@@ -430,7 +432,8 @@ static int formats_declared(AVFilterContext *f)
return 0;
if (f->outputs[i]->type == AVMEDIA_TYPE_VIDEO &&
!(f->outputs[i]->incfg.color_ranges &&
f->outputs[i]->incfg.color_spaces))
f->outputs[i]->incfg.color_spaces &&
f->outputs[i]->incfg.alpha_modes))
return 0;
if (f->outputs[i]->type == AVMEDIA_TYPE_AUDIO &&
!(f->outputs[i]->incfg.samplerates &&
@@ -641,6 +644,10 @@ retry:
av_assert0( inlink->outcfg.color_ranges->refcount > 0);
av_assert0(outlink-> incfg.color_ranges->refcount > 0);
av_assert0(outlink->outcfg.color_ranges->refcount > 0);
av_assert0( inlink-> incfg.alpha_modes->refcount > 0);
av_assert0( inlink->outcfg.alpha_modes->refcount > 0);
av_assert0(outlink-> incfg.alpha_modes->refcount > 0);
av_assert0(outlink->outcfg.alpha_modes->refcount > 0);
} else if (outlink->type == AVMEDIA_TYPE_AUDIO) {
av_assert0( inlink-> incfg.samplerates->refcount > 0);
av_assert0( inlink->outcfg.samplerates->refcount > 0);
@@ -820,8 +827,8 @@ static int pick_format(AVFilterLink *link, AVFilterLink *ref)
swfmt = AV_PIX_FMT_YUV420P;
}
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(swfmt);
if (!ff_fmt_is_regular_yuv(swfmt)) {
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(swfmt);
/* These fields are explicitly documented as affecting YUV only,
* so set them to sane values for other formats. */
if (desc->flags & AV_PIX_FMT_FLAG_FLOAT)
@@ -856,6 +863,19 @@ static int pick_format(AVFilterLink *link, AVFilterLink *ref)
link->color_range = link->incfg.color_ranges->formats[0];
}
}
if (desc->flags & AV_PIX_FMT_FLAG_ALPHA) {
if (!link->incfg.alpha_modes->nb_formats) {
av_log(link->src, AV_LOG_ERROR, "Cannot select alpha mode for"
" the link between filters %s and %s.\n", link->src->name,
link->dst->name);
return AVERROR(EINVAL);
}
link->incfg.alpha_modes->nb_formats = 1;
link->alpha_mode = link->incfg.alpha_modes->formats[0];
} else {
link->alpha_mode = AVALPHA_MODE_UNSPECIFIED;
}
} else if (link->type == AVMEDIA_TYPE_AUDIO) {
int ret;
@@ -894,6 +914,8 @@ static int pick_format(AVFilterLink *link, AVFilterLink *ref)
ff_formats_unref(&link->outcfg.color_spaces);
ff_formats_unref(&link->incfg.color_ranges);
ff_formats_unref(&link->outcfg.color_ranges);
ff_formats_unref(&link->incfg.alpha_modes);
ff_formats_unref(&link->outcfg.alpha_modes);
return 0;
}
@@ -947,6 +969,8 @@ static int reduce_formats_on_filter(AVFilterContext *filter)
nb_formats, ff_add_format);
REDUCE_FORMATS(int, AVFilterFormats, color_ranges, formats,
nb_formats, ff_add_format);
REDUCE_FORMATS(int, AVFilterFormats, alpha_modes, formats,
nb_formats, ff_add_format);
/* reduce channel layouts */
for (i = 0; i < filter->nb_inputs; i++) {