X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavfilter%2Fformats.c;h=fa2c1be4bb897df6e95254769a79c4f19d6826e8;hb=4478e9d8db65ca827f2b3ef3ef6ee806bffdba45;hp=46698ef990b113c0ce8f88ed6988d0589014b0ee;hpb=fae714a9fbff876c4cacfe7d437c940d557b44ce;p=ffmpeg

diff --git a/libavfilter/formats.c b/libavfilter/formats.c
index 46698ef990b..fa2c1be4bb8 100644
--- a/libavfilter/formats.c
+++ b/libavfilter/formats.c
@@ -56,8 +56,15 @@ AVFilterFormats *avfilter_merge_formats(AVFilterFormats *a, AVFilterFormats *b)
                                                            b->format_count));
     for (i = 0; i < a->format_count; i++)
         for (j = 0; j < b->format_count; j++)
-            if (a->formats[i] == b->formats[j])
+            if (a->formats[i] == b->formats[j]){
+                if(k >= FFMIN(a->format_count, b->format_count)){
+                    av_log(0, AV_LOG_ERROR, "Duplicate formats in avfilter_merge_formats() detected\n");
+                    av_free(ret->formats);
+                    av_free(ret);
+                    return NULL;
+                }
                 ret->formats[k++] = a->formats[i];
+            }
 
     ret->format_count = k;
     /* check that there was at least one common format */
@@ -86,6 +93,32 @@ int ff_fmt_is_in(int fmt, const int *fmts)
     return 0;
 }
 
+#define COPY_INT_LIST(list_copy, list, type) {                          \
+    int count = 0;                                                      \
+    if (list)                                                           \
+        for (count = 0; list[count] != -1; count++)                     \
+            ;                                                           \
+    list_copy = av_calloc(count+1, sizeof(type));                       \
+    if (list_copy) {                                                    \
+        memcpy(list_copy, list, sizeof(type) * count);                  \
+        list_copy[count] = -1;                                          \
+    }                                                                   \
+}
+
+int *ff_copy_int_list(const int * const list)
+{
+    int *ret = NULL;
+    COPY_INT_LIST(ret, list, int);
+    return ret;
+}
+
+int64_t *ff_copy_int64_list(const int64_t * const list)
+{
+    int64_t *ret = NULL;
+    COPY_INT_LIST(ret, list, int64_t);
+    return ret;
+}
+
 #define MAKE_FORMAT_LIST()                                              \
     AVFilterFormats *formats;                                           \
     int count = 0;                                                      \
@@ -172,7 +205,7 @@ AVFilterFormats *avfilter_make_all_channel_layouts(void)
 
 AVFilterFormats *avfilter_make_all_packing_formats(void)
 {
-    static int packing[] = {
+    static const int packing[] = {
         AVFILTER_PACKED,
         AVFILTER_PLANAR,
         -1,