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authorPaul B Mahol <onemda@gmail.com>2017-10-10 21:18:03 +0200
committerPaul B Mahol <onemda@gmail.com>2017-11-03 21:15:42 +0100
commit1f24b33d9af83a02ed06a644797028b139281096 (patch)
tree08d1d1eec905ce4722cd29d703d1b4ed8e9cb4f1 /libavfilter/vf_tile.c
parent6a50a8f340161a0b65feb3537591b0381a6a6b38 (diff)
downloadffmpeg-1f24b33d9af83a02ed06a644797028b139281096.tar.gz
avfilter/vf_tile: remove limit of max tile size
Signed-off-by: Paul B Mahol <onemda@gmail.com>
Diffstat (limited to 'libavfilter/vf_tile.c')
-rw-r--r--libavfilter/vf_tile.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/libavfilter/vf_tile.c b/libavfilter/vf_tile.c
index 87e0b940cf..e9d246fc73 100644
--- a/libavfilter/vf_tile.c
+++ b/libavfilter/vf_tile.c
@@ -23,6 +23,7 @@
* tile video filter
*/
+#include "libavutil/imgutils.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
@@ -44,8 +45,6 @@ typedef struct TileContext {
uint8_t rgba_color[4];
} TileContext;
-#define REASONABLE_SIZE 1024
-
#define OFFSET(x) offsetof(TileContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
@@ -68,12 +67,21 @@ static av_cold int init(AVFilterContext *ctx)
{
TileContext *tile = ctx->priv;
- if (tile->w > REASONABLE_SIZE || tile->h > REASONABLE_SIZE) {
+ if (tile->w > UINT_MAX / tile->h) {
av_log(ctx, AV_LOG_ERROR, "Tile size %ux%u is insane.\n",
tile->w, tile->h);
return AVERROR(EINVAL);
}
+ if (tile->padding) {
+ if ((tile->w - 1 > (UINT32_MAX - 2 * tile->margin) / tile->padding) ||
+ (tile->h - 1 > (UINT32_MAX - 2 * tile->margin) / tile->padding)) {
+ av_log(ctx, AV_LOG_ERROR, "Combination of Tile size %ux%u, padding %d and margin %d overflows.\n",
+ tile->w, tile->h, tile->padding, tile->margin);
+ return AVERROR(EINVAL);
+ }
+ }
+
if (tile->nb_frames == 0) {
tile->nb_frames = tile->w * tile->h;
} else if (tile->nb_frames > tile->w * tile->h) {
@@ -142,6 +150,7 @@ static void draw_blank_frame(AVFilterContext *ctx, AVFrame *out_buf)
x0, y0, inlink->w, inlink->h);
tile->current++;
}
+
static int end_last_frame(AVFilterContext *ctx)
{
TileContext *tile = ctx->priv;