diff options
Diffstat (limited to 'libavutil/buffer.c')
-rw-r--r-- | libavutil/buffer.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/libavutil/buffer.c b/libavutil/buffer.c index e9bf54b96c..e8ec2c97e0 100644 --- a/libavutil/buffer.c +++ b/libavutil/buffer.c @@ -117,6 +117,35 @@ void av_buffer_unref(AVBufferRef **buf) } } +int av_buffer_release(AVBufferRef **buf, uint8_t **data) +{ + AVBuffer *b; + int ret = 0; + + if (data) + *data = NULL; + if (!buf || !*buf) + return 0; + b = (*buf)->buffer; + av_freep(buf); + + if (data && avpriv_atomic_int_get(&b->refcount) > 1) { + *data = av_memdup(b->data, b->size); + if (!*data) + ret = AVERROR(ENOMEM); + } + + if (!avpriv_atomic_int_add_and_fetch(&b->refcount, -1)) { + if (data && !*data) { + ret = 0; + *data = b->data; + } else + b->free(b->opaque, b->data); + av_freep(&b); + } + return ret; +} + int av_buffer_is_writable(const AVBufferRef *buf) { if (buf->buffer->flags & AV_BUFFER_FLAG_READONLY) |