avcodec: Add av_fast_padded_malloc().

Wrapper around av_fast_malloc() that keeps FF_INPUT_BUFFER_PADDING_SIZE
zero-padded bytes at the end of the used buffer.

Based on a patch by Reimar Döffinger <Reimar.Doeffinger@gmx.de>.

1 files changed, 9 insertions, 0 deletions

diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index c70eb85..fcbb68a 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -4071,6 +4071,15 @@ void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size);
 void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size);
 
 /**
+ * Allocate a buffer with padding, reusing the given one if large enough.
+ *
+ * Same behaviour av_fast_malloc but the buffer has additional
+ * FF_INPUT_PADDING_SIZE at the end which will always memset to 0.
+ *
+ */
+void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size);
+
+/**
  * Copy image src to dst. Wraps av_picture_data_copy() above.
  */
 void av_picture_copy(AVPicture *dst, const AVPicture *src,