Factor duplicated ff_fast_malloc() out into mem_internal.h

internal.h is difficult to use due to circular dependancies
mem.h is a public header ff_* is not public
Alternative solutions probably are possible too

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

1 files changed, 42 insertions, 0 deletions

diff --git a/libavutil/mem_internal.h b/libavutil/mem_internal.h
new file mode 100644
index 0000000000..54e14ac7b6
--- /dev/null
+++ b/libavutil/mem_internal.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2002 Fabrice Bellard
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVUTIL_MEM_INTERNAL_H
+#define AVUTIL_MEM_INTERNAL_H
+
+static inline int ff_fast_malloc(void *ptr, unsigned int *size, size_t min_size, int zero_realloc)
+{
+    void *val;
+
+    memcpy(&val, ptr, sizeof(val));
+    if (min_size <= *size) {
+        av_assert0(val || !min_size);
+        return 0;
+    }
+    min_size = FFMAX(min_size + min_size / 16 + 32, min_size);
+    av_freep(ptr);
+    val = zero_realloc ? av_mallocz(min_size) : av_malloc(min_size);
+    memcpy(ptr, &val, sizeof(val));
+    if (!val)
+        min_size = 0;
+    *size = min_size;
+    return 1;
+}
+#endif /* AVUTIL_MEM_INTERNAL_H */