avfilter/vf_tile: add overlap option

Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2017-11-07 19:41:06 +01:00
parent a7e7abf849
commit 7a060867f3
2 changed files with 49 additions and 9 deletions

View File

@ -14441,6 +14441,10 @@ refer to the pad video filter.
Specify the color of the unused area. For the syntax of this option, check the
"Color" section in the ffmpeg-utils manual. The default value of @var{color}
is "black".
@item overlap
Set the number of frames to overlap when tiling several successive frames together.
The value must be between @code{0} and @var{nb_frames - 1}.
@end table
@subsection Examples

View File

@ -37,11 +37,13 @@ typedef struct TileContext {
unsigned w, h;
unsigned margin;
unsigned padding;
unsigned overlap;
unsigned current;
unsigned nb_frames;
FFDrawContext draw;
FFDrawColor blank;
AVFrame *out_ref;
AVFrame *prev_out_ref;
uint8_t rgba_color[4];
} TileContext;
@ -58,6 +60,8 @@ static const AVOption tile_options[] = {
{ "padding", "set inner border thickness in pixels", OFFSET(padding),
AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1024, FLAGS },
{ "color", "set the color of the unused area", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str = "black"}, .flags = FLAGS },
{ "overlap", "set how many frames to overlap for each render", OFFSET(overlap),
AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
{ NULL }
};
@ -90,6 +94,11 @@ static av_cold int init(AVFilterContext *ctx)
return AVERROR(EINVAL);
}
if (tile->overlap >= tile->nb_frames) {
av_log(ctx, AV_LOG_WARNING, "overlap must be less than %d\n", tile->nb_frames);
tile->overlap = tile->nb_frames - 1;
}
return 0;
}
@ -120,19 +129,19 @@ static int config_props(AVFilterLink *outlink)
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,
av_make_q(1, tile->nb_frames));
av_make_q(1, tile->nb_frames - tile->overlap));
ff_draw_init(&tile->draw, inlink->format, 0);
ff_draw_color(&tile->draw, &tile->blank, tile->rgba_color);
return 0;
}
static void get_current_tile_pos(AVFilterContext *ctx, unsigned *x, unsigned *y)
static void get_tile_pos(AVFilterContext *ctx, unsigned *x, unsigned *y, unsigned current)
{
TileContext *tile = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
const unsigned tx = tile->current % tile->w;
const unsigned ty = tile->current / tile->w;
const unsigned tx = current % tile->w;
const unsigned ty = current / tile->w;
*x = tile->margin + (inlink->w + tile->padding) * tx;
*y = tile->margin + (inlink->h + tile->padding) * ty;
@ -144,7 +153,7 @@ static void draw_blank_frame(AVFilterContext *ctx, AVFrame *out_buf)
AVFilterLink *inlink = ctx->inputs[0];
unsigned x0, y0;
get_current_tile_pos(ctx, &x0, &y0);
get_tile_pos(ctx, &x0, &y0, tile->current);
ff_fill_rectangle(&tile->draw, &tile->blank,
out_buf->data, out_buf->linesize,
x0, y0, inlink->w, inlink->h);
@ -160,8 +169,13 @@ static int end_last_frame(AVFilterContext *ctx)
while (tile->current < tile->nb_frames)
draw_blank_frame(ctx, out_buf);
tile->current = tile->overlap;
if (tile->current) {
av_frame_free(&tile->prev_out_ref);
tile->prev_out_ref = av_frame_clone(out_buf);
}
ret = ff_filter_frame(outlink, out_buf);
tile->current = 0;
tile->out_ref = NULL;
return ret;
}
@ -176,7 +190,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
AVFilterLink *outlink = ctx->outputs[0];
unsigned x0, y0;
if (!tile->current) {
if (!tile->out_ref) {
tile->out_ref = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!tile->out_ref) {
av_frame_free(&picref);
@ -194,7 +208,21 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
0, 0, outlink->w, outlink->h);
}
get_current_tile_pos(ctx, &x0, &y0);
if (tile->prev_out_ref) {
unsigned x1, y1, i;
for (i = tile->nb_frames - tile->overlap; i < tile->nb_frames; i++) {
get_tile_pos(ctx, &x1, &y1, i);
get_tile_pos(ctx, &x0, &y0, i - (tile->nb_frames - tile->overlap));
ff_copy_rectangle2(&tile->draw,
tile->out_ref->data, tile->out_ref->linesize,
tile->prev_out_ref->data, tile->prev_out_ref->linesize,
x0, y0, x1, y1, inlink->w, inlink->h);
}
}
get_tile_pos(ctx, &x0, &y0, tile->current);
ff_copy_rectangle2(&tile->draw,
tile->out_ref->data, tile->out_ref->linesize,
picref->data, picref->linesize,
@ -215,11 +243,18 @@ static int request_frame(AVFilterLink *outlink)
int r;
r = ff_request_frame(inlink);
if (r == AVERROR_EOF && tile->current)
if (r == AVERROR_EOF && tile->current && tile->out_ref)
r = end_last_frame(ctx);
return r;
}
static av_cold void uninit(AVFilterContext *ctx)
{
TileContext *tile = ctx->priv;
av_frame_free(&tile->prev_out_ref);
}
static const AVFilterPad tile_inputs[] = {
{
.name = "default",
@ -243,6 +278,7 @@ AVFilter ff_vf_tile = {
.name = "tile",
.description = NULL_IF_CONFIG_SMALL("Tile several successive frames together."),
.init = init,
.uninit = uninit,
.query_formats = query_formats,
.priv_size = sizeof(TileContext),
.inputs = tile_inputs,