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avutil/buffer: factor buffer_replace() out

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-01-15 00:40:35 +01:00
parent ecd39520b8
commit b4f5da2651
1 changed files with 16 additions and 5 deletions
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21
libavutil/buffer.c
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@ -103,14 +103,17 @@ AVBufferRef *av_buffer_ref(AVBufferRef *buf)
return ret; return ret;
} }
void av_buffer_unref(AVBufferRef **buf) static void buffer_replace(AVBufferRef **dst, AVBufferRef **src)
{ {
AVBuffer *b; AVBuffer *b;
if (!buf || !*buf) b = (*dst)->buffer;
return;
b = (*buf)->buffer; if (src) {
av_freep(buf); **dst = **src;
av_freep(src);
} else
av_freep(dst);
if (!avpriv_atomic_int_add_and_fetch(&b->refcount, -1)) { if (!avpriv_atomic_int_add_and_fetch(&b->refcount, -1)) {
b->free(b->opaque, b->data); b->free(b->opaque, b->data);
@ -118,6 +121,14 @@ void av_buffer_unref(AVBufferRef **buf)
} }
} }
void av_buffer_unref(AVBufferRef **buf)
{
if (!buf || !*buf)
return;
buffer_replace(buf, NULL);
}
int av_buffer_is_writable(const AVBufferRef *buf) int av_buffer_is_writable(const AVBufferRef *buf)
{ {
if (buf->buffer->flags & AV_BUFFER_FLAG_READONLY) if (buf->buffer->flags & AV_BUFFER_FLAG_READONLY)