[FFmpeg-devel] [PATCH 2/2] avformat/matroskadec: use av_fast_realloc to reallocate ebml list arrays

[James Almer]

Speeds up the process considerably.

Fixes ticket #8109.

Suggested-by: nevcairiel
Suggested-by: cehoyos
Signed-off-by: James Almer <jamrial at gmail.com>
---
 libavformat/matroskadec.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index 439ee462a5..fe45c4fd7f 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -110,6 +110,7 @@ typedef const struct EbmlSyntax {
 
 typedef struct EbmlList {
     int nb_elem;
+    unsigned int alloc_elem_size;
     void *elem;
 } EbmlList;
 
@@ -1236,8 +1237,9 @@ static int ebml_parse(MatroskaDemuxContext *matroska,
         data = (char *) data + syntax->data_offset;
         if (syntax->list_elem_size) {
             EbmlList *list = data;
-            void *newelem = av_realloc_array(list->elem, list->nb_elem + 1,
-                                                   syntax->list_elem_size);
+            void *newelem = av_fast_realloc(list->elem,
+                                            &list->alloc_elem_size,
+                                            (list->nb_elem + 1) * syntax->list_elem_size);
             if (!newelem)
                 return AVERROR(ENOMEM);
             list->elem = newelem;
-- 
2.22.0