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chromakey: Use the pixel descriptor API for chroma subsampling info

This commit is contained in:
Timothy Gu 2015-10-13 21:31:47 -07:00
parent a8e86b0e3f
commit ed53c14a3c
1 changed files with 17 additions and 8 deletions
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25
libavfilter/vf_chromakey.c
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@ -35,6 +35,9 @@ typedef struct ChromakeyContext {
float blend;
int is_yuv;
int hsub_log2;
int vsub_log2;
} ChromakeyContext;
static uint8_t do_chromakey_pixel(ChromakeyContext *ctx, uint8_t u[9], uint8_t v[9])
@ -79,24 +82,17 @@ static int do_chromakey_slice(AVFilterContext *avctx, void *arg, int jobnr, int
ChromakeyContext *ctx = avctx->priv;
int hsub_log2 = 0, vsub_log2 = 0;
int x, y, xo, yo;
uint8_t u[9], v[9];
memset(u, ctx->chromakey_uv[0], sizeof(u));
memset(v, ctx->chromakey_uv[1], sizeof(v));
if (frame->format == AV_PIX_FMT_YUVA420P || frame->format == AV_PIX_FMT_YUVA422P)
hsub_log2 = 1;
if (frame->format == AV_PIX_FMT_YUVA420P)
vsub_log2 = 1;
for (y = slice_start; y < slice_end; ++y) {
for (x = 0; x < frame->width; ++x) {
for (yo = 0; yo < 3; ++yo) {
for (xo = 0; xo < 3; ++xo) {
get_pixel_uv(frame, hsub_log2, vsub_log2, x + xo - 1, y + yo - 1, &u[yo * 3 + xo], &v[yo * 3 + xo]);
get_pixel_uv(frame, ctx->hsub_log2, ctx->vsub_log2, x + xo - 1, y + yo - 1, &u[yo * 3 + xo], &v[yo * 3 + xo]);
}
}
@ -155,12 +151,25 @@ static av_cold int query_formats(AVFilterContext *avctx)
return ff_set_common_formats(avctx, formats);
}
static av_cold int config_input(AVFilterLink *inlink)
{
AVFilterContext *avctx = inlink->dst;
ChromakeyContext *ctx = avctx->priv;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
ctx->hsub_log2 = desc->log2_chroma_w;
ctx->vsub_log2 = desc->log2_chroma_h;
return 0;
}
static const AVFilterPad chromakey_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.needs_writable = 1,
.filter_frame = filter_frame,
.config_props = config_input,
},
{ NULL }
};