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avfilter/vf_drawbox: add alpha pixel formats support 

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2016-02-15 11:38:22 +01:00
parent f6492a2ea8
commit 5589698e0b
1 changed files with 57 additions and 0 deletions
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57
libavfilter/vf_drawbox.c
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@ -79,6 +79,7 @@ typedef struct DrawBoxContext {
char *x_expr, *y_expr; ///< expression for x and y
char *w_expr, *h_expr; ///< expression for width and height
char *t_expr; ///< expression for thickness
int have_alpha;
} DrawBoxContext;
static const int NUM_EXPR_EVALS = 5;
@ -110,6 +111,7 @@ static int query_formats(AVFilterContext *ctx)
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
AV_PIX_FMT_NONE
};
AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
@ -130,6 +132,7 @@ static int config_input(AVFilterLink *inlink)
s->hsub = desc->log2_chroma_w;
s->vsub = desc->log2_chroma_h;
s->have_alpha = desc->flags & AV_PIX_FMT_FLAG_ALPHA;
var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h;
var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w;
@ -210,6 +213,33 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
int plane, x, y, xb = s->x, yb = s->y;
unsigned char *row[4];
if (s->have_alpha) {
for (y = FFMAX(yb, 0); y < frame->height && y < (yb + s->h); y++) {
row[0] = frame->data[0] + y * frame->linesize[0];
row[3] = frame->data[3] + y * frame->linesize[3];
for (plane = 1; plane < 3; plane++)
row[plane] = frame->data[plane] +
frame->linesize[plane] * (y >> s->vsub);
if (s->invert_color) {
for (x = FFMAX(xb, 0); x < xb + s->w && x < frame->width; x++)
if ((y - yb < s->thickness) || (yb + s->h - 1 - y < s->thickness) ||
(x - xb < s->thickness) || (xb + s->w - 1 - x < s->thickness))
row[0][x] = 0xff - row[0][x];
} else {
for (x = FFMAX(xb, 0); x < xb + s->w && x < frame->width; x++) {
if ((y - yb < s->thickness) || (yb + s->h - 1 - y < s->thickness) ||
(x - xb < s->thickness) || (xb + s->w - 1 - x < s->thickness)) {
row[0][x ] = s->yuv_color[Y];
row[1][x >> s->hsub] = s->yuv_color[U];
row[2][x >> s->hsub] = s->yuv_color[V];
row[3][x ] = s->yuv_color[A];
}
}
}
}
} else {
for (y = FFMAX(yb, 0); y < frame->height && y < (yb + s->h); y++) {
row[0] = frame->data[0] + y * frame->linesize[0];
@ -235,6 +265,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
}
}
}
}
return ff_filter_frame(inlink->dst->outputs[0], frame);
}
@ -323,6 +354,31 @@ static int drawgrid_filter_frame(AVFilterLink *inlink, AVFrame *frame)
int plane, x, y;
uint8_t *row[4];
if (drawgrid->have_alpha) {
for (y = 0; y < frame->height; y++) {
row[0] = frame->data[0] + y * frame->linesize[0];
row[3] = frame->data[3] + y * frame->linesize[3];
for (plane = 1; plane < 3; plane++)
row[plane] = frame->data[plane] +
frame->linesize[plane] * (y >> drawgrid->vsub);
if (drawgrid->invert_color) {
for (x = 0; x < frame->width; x++)
if (pixel_belongs_to_grid(drawgrid, x, y))
row[0][x] = 0xff - row[0][x];
} else {
for (x = 0; x < frame->width; x++) {
if (pixel_belongs_to_grid(drawgrid, x, y)) {
row[0][x ] = drawgrid->yuv_color[Y];
row[1][x >> drawgrid->hsub] = drawgrid->yuv_color[U];
row[2][x >> drawgrid->hsub] = drawgrid->yuv_color[V];
row[3][x ] = drawgrid->yuv_color[A];
}
}
}
}
} else {
for (y = 0; y < frame->height; y++) {
row[0] = frame->data[0] + y * frame->linesize[0];
@ -346,6 +402,7 @@ static int drawgrid_filter_frame(AVFilterLink *inlink, AVFrame *frame)
}
}
}
}
return ff_filter_frame(inlink->dst->outputs[0], frame);
}