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avfilter/overlay_vaapi: precalculate blend_state, enable pixel alpha 

Signed-off-by: softworkz <softworkz@hotmail.com>
This commit is contained in:
softworkz 2022-10-31 06:20:04 +00:00 committed by Haihao Xiang
parent 916447bf4c
commit ff075f5abb
1 changed files with 42 additions and 2 deletions
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44
libavfilter/vf_overlay_vaapi.c
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@ -36,6 +36,8 @@ typedef struct OverlayVAAPIContext {
int overlay_ow;
int overlay_oh;
float alpha;
unsigned int blend_flags;
float blend_alpha;
} OverlayVAAPIContext;
static int overlay_vaapi_build_filter_params(AVFilterContext *avctx)
@ -246,8 +248,8 @@ static int overlay_vaapi_blend(FFFrameSync *fs)
memcpy(&subpic_params, &params, sizeof(subpic_params));
blend_state.flags = VA_BLEND_GLOBAL_ALPHA;
blend_state.global_alpha = ctx->alpha;
blend_state.flags = ctx->blend_flags;
blend_state.global_alpha = ctx->blend_alpha;
subpic_params.blend_state = &blend_state;
subpic_params.surface = (VASurfaceID)(uintptr_t)input_overlay->data[3];
@ -269,6 +271,43 @@ fail:
return err;
}
static int have_alpha_planar(AVFilterLink *link)
{
enum AVPixelFormat pix_fmt = link->format;
const AVPixFmtDescriptor *desc;
AVHWFramesContext *fctx;
if (link->format == AV_PIX_FMT_VAAPI) {
fctx = (AVHWFramesContext *)link->hw_frames_ctx->data;
pix_fmt = fctx->sw_format;
}
desc = av_pix_fmt_desc_get(pix_fmt);
if (!desc)
return 0;
return !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA);
}
static int overlay_vaapi_config_input_overlay(AVFilterLink *inlink)
{
AVFilterContext *avctx = inlink->dst;
OverlayVAAPIContext *ctx = avctx->priv;
ctx->blend_flags = 0;
ctx->blend_alpha = 1.0f;
if (ctx->alpha < 1.0f) {
ctx->blend_flags |= VA_BLEND_GLOBAL_ALPHA;
ctx->blend_alpha = ctx->alpha;
}
if (have_alpha_planar(inlink))
ctx->blend_flags |= VA_BLEND_PREMULTIPLIED_ALPHA;
return 0;
}
static int overlay_vaapi_config_output(AVFilterLink *outlink)
{
AVFilterContext *avctx = outlink->src;
@ -353,6 +392,7 @@ static const AVFilterPad overlay_vaapi_inputs[] = {
{
.name = "overlay",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = overlay_vaapi_config_input_overlay,
},
};