diff options
author | Anton Khirnov <anton@khirnov.net> | 2020-06-05 11:17:49 +0200 |
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committer | Anton Khirnov <anton@khirnov.net> | 2020-09-28 11:33:35 +0200 |
commit | 68918d3b7fda9e75d436a27705c54b77dcb41ba9 (patch) | |
tree | 66fea07125274cf4107ebc07b9dacfeb517f2359 /libavutil/buffer.c | |
parent | 5bbf58ab876279ca1a5a2f30563f271c99b93e62 (diff) |
lavu/buffer: add a convenience function for replacing buffers
A common pattern e.g. in libavcodec is replacing/updating buffer
references: unref old one, ref new one. This function allows simplifying
such code and avoiding unnecessary refs+unrefs if the references are
already equivalent.
Diffstat (limited to 'libavutil/buffer.c')
-rw-r--r-- | libavutil/buffer.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/libavutil/buffer.c b/libavutil/buffer.c index 08e6079139..d67b4bbdaf 100644 --- a/libavutil/buffer.c +++ b/libavutil/buffer.c @@ -216,6 +216,32 @@ int av_buffer_realloc(AVBufferRef **pbuf, int size) return 0; } +int av_buffer_replace(AVBufferRef **pdst, AVBufferRef *src) +{ + AVBufferRef *dst = *pdst; + AVBufferRef *tmp; + + if (!src) { + av_buffer_unref(pdst); + return 0; + } + + if (dst && dst->buffer == src->buffer) { + /* make sure the data pointers match */ + dst->data = src->data; + dst->size = src->size; + return 0; + } + + tmp = av_buffer_ref(src); + if (!tmp) + return AVERROR(ENOMEM); + + av_buffer_unref(pdst); + *pdst = tmp; + return 0; +} + AVBufferPool *av_buffer_pool_init2(int size, void *opaque, AVBufferRef* (*alloc)(void *opaque, int size), void (*pool_free)(void *opaque)) |