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Code Issues Releases Activity

lavfi/tile: add margin and padding options.

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This commit is contained in:
Clément Bœsch 2012-11-11 22:37:20 +01:00
parent aa5a029091
commit ecfaff350f
1 changed files with 33 additions and 8 deletions
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41
libavfilter/vf_tile.c
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@ -34,6 +34,8 @@
typedef struct {
const AVClass *class;
unsigned w, h;
unsigned margin;
unsigned padding;
unsigned current;
FFDrawContext draw;
FFDrawColor blank;
@ -47,6 +49,10 @@ typedef struct {
static const AVOption tile_options[] = {
{ "layout", "set grid size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE,
{.str = "6x5"}, 0, 0, FLAGS },
{ "margin", "set outer border margin in pixels", OFFSET(margin),
AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1024, FLAGS },
{ "padding", "set inner border thickness in pixels", OFFSET(padding),
AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1024, FLAGS },
{NULL},
};
@ -83,19 +89,21 @@ static int config_props(AVFilterLink *outlink)
AVFilterContext *ctx = outlink->src;
TileContext *tile = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
const unsigned total_margin_w = (tile->w - 1) * tile->padding + 2*tile->margin;
const unsigned total_margin_h = (tile->h - 1) * tile->padding + 2*tile->margin;
if (inlink->w > INT_MAX / tile->w) {
if (inlink->w > (INT_MAX - total_margin_w) / tile->w) {
av_log(ctx, AV_LOG_ERROR, "Total width %ux%u is too much.\n",
tile->w, inlink->w);
return AVERROR(EINVAL);
}
if (inlink->h > INT_MAX / tile->h) {
if (inlink->h > (INT_MAX - total_margin_h) / tile->h) {
av_log(ctx, AV_LOG_ERROR, "Total height %ux%u is too much.\n",
tile->h, inlink->h);
return AVERROR(EINVAL);
}
outlink->w = tile->w * inlink->w;
outlink->h = tile->h * inlink->h;
outlink->w = tile->w * inlink->w + total_margin_w;
outlink->h = tile->h * inlink->h + total_margin_h;
outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
outlink->frame_rate = av_mul_q(inlink->frame_rate,
(AVRational){ 1, tile->w * tile->h });
@ -123,17 +131,34 @@ static int start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
avfilter_copy_buffer_ref_props(outlink->out_buf, picref);
outlink->out_buf->video->w = outlink->w;
outlink->out_buf->video->h = outlink->h;
/* fill surface once for margin/padding */
if (tile->margin || tile->padding)
ff_fill_rectangle(&tile->draw, &tile->blank,
outlink->out_buf->data, outlink->out_buf->linesize,
0, 0, outlink->w, outlink->h);
return 0;
}
static void get_current_tile_pos(AVFilterContext *ctx, unsigned *x, unsigned *y)
{
TileContext *tile = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
const unsigned tx = tile->current % tile->w;
const unsigned ty = tile->current / tile->w;
*x = tile->margin + (inlink->w + tile->padding) * tx;
*y = tile->margin + (inlink->h + tile->padding) * ty;
}
static int draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
{
AVFilterContext *ctx = inlink->dst;
TileContext *tile = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
unsigned x0 = inlink->w * (tile->current % tile->w);
unsigned y0 = inlink->h * (tile->current / tile->w);
unsigned x0, y0;
get_current_tile_pos(ctx, &x0, &y0);
ff_copy_rectangle2(&tile->draw,
outlink->out_buf->data, outlink->out_buf->linesize,
inlink ->cur_buf->data, inlink ->cur_buf->linesize,
@ -147,9 +172,9 @@ static void draw_blank_frame(AVFilterContext *ctx, AVFilterBufferRef *out_buf)
{
TileContext *tile = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
unsigned x0 = inlink->w * (tile->current % tile->w);
unsigned y0 = inlink->h * (tile->current / tile->w);
unsigned x0, y0;
get_current_tile_pos(ctx, &x0, &y0);
ff_fill_rectangle(&tile->draw, &tile->blank,
out_buf->data, out_buf->linesize,
x0, y0, inlink->w, inlink->h);