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Code Issues Releases Activity

lavfi/vf_tile: switch to filter_frame.

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Also add error check on buffer allocation.
This commit is contained in:
Nicolas George 2012-11-29 17:08:30 +01:00
parent 8be18ffd6a
commit 6f3d2fb18b
1 changed files with 33 additions and 50 deletions
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83
libavfilter/vf_tile.c
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@ -126,32 +126,6 @@ static int config_props(AVFilterLink *outlink)
return 0;
}
/* Note: direct rendering is not possible since there is no guarantee that
* buffers are fed to start_frame in the order they were obtained from
* get_buffer (think B-frames). */
static int start_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
{
AVFilterContext *ctx = inlink->dst;
TileContext *tile = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
if (tile->current)
return 0;
outlink->out_buf = ff_get_video_buffer(outlink, AV_PERM_WRITE,
outlink->w, outlink->h);
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;
@ -163,23 +137,6 @@ static void get_current_tile_pos(AVFilterContext *ctx, unsigned *x, unsigned *y)
*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, 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,
x0, y0 + y, 0, y, inlink->cur_buf->video->w, h);
/* TODO if tile->w == 1 && slice_dir is always 1, we could draw_slice
* immediately. */
return 0;
}
static void draw_blank_frame(AVFilterContext *ctx, AVFilterBufferRef *out_buf)
{
TileContext *tile = ctx->priv;
@ -199,22 +156,50 @@ static void end_last_frame(AVFilterContext *ctx)
AVFilterBufferRef *out_buf = outlink->out_buf;
outlink->out_buf = NULL;
ff_start_frame(outlink, out_buf);
while (tile->current < tile->nb_frames)
draw_blank_frame(ctx, out_buf);
ff_draw_slice(outlink, 0, out_buf->video->h, 1);
ff_end_frame(outlink);
ff_filter_frame(outlink, out_buf);
tile->current = 0;
}
static int end_frame(AVFilterLink *inlink)
/* Note: direct rendering is not possible since there is no guarantee that
* buffers are fed to filter_frame in the order they were obtained from
* get_buffer (think B-frames). */
static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *picref)
{
AVFilterContext *ctx = inlink->dst;
TileContext *tile = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
unsigned x0, y0;
if (!tile->current) {
outlink->out_buf = ff_get_video_buffer(outlink, AV_PERM_WRITE,
outlink->w, outlink->h);
if (!outlink->out_buf)
return AVERROR(ENOMEM);
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);
}
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,
x0, y0, 0, 0, inlink->w, inlink->h);
avfilter_unref_bufferp(&inlink->cur_buf);
if (++tile->current == tile->nb_frames)
end_last_frame(ctx);
return 0;
}
@ -244,9 +229,7 @@ static const AVFilterPad tile_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.start_frame = start_frame,
.draw_slice = draw_slice,
.end_frame = end_frame,
.filter_frame= filter_frame,
.min_perms = AV_PERM_READ,
},
{ NULL }