Ticket #5636: cache.patch

libavformat/cache.c

@@ -63 +63 @@
     URLContext *inner;
     int64_t cache_hit, cache_miss;
     int read_ahead_limit;
+    char* cache_path;
 } Context;
 
 static int cmp(const void *key, const void *node)
@@ -77 +78 @@
 
     av_strstart(arg, "cache:", &arg);
 
-    c->fd = avpriv_tempfile("ffcache", &buffername, 0, h);
+#   ifndef O_BINARY
+#       define O_BINARY 0
+#   endif
+    if (c->cache_path)
+      c->fd = open(c->cache_path, O_RDWR | O_BINARY | O_CREAT | O_EXCL, 0600);
+    else
+      c->fd = av_tempfile("ffcache", &buffername, 0, h);
+    
     if (c->fd < 0){
         av_log(h, AV_LOG_ERROR, "Failed to create tempfile\n");
         return c->fd;
     }
 
+    if (!c->cache_path)
+    {
     unlink(buffername);
     av_freep(&buffername);
+    }
 
     return ffurl_open_whitelist(&c->inner, arg, flags, &h->interrupt_callback,
                                 options, h->protocol_whitelist, h->protocol_blacklist, h);
@@ -309 +320 @@
 
 static const AVOption options[] = {
     { "read_ahead_limit", "Amount in bytes that may be read ahead when seeking isn't supported, -1 for unlimited", OFFSET(read_ahead_limit), AV_OPT_TYPE_INT, { .i64 = 65536 }, -1, INT_MAX, D },
+    {"cache_path", "cache path", offsetof(Context, cache_path), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, D},
     {NULL},
 };