Function pool_alloc_buffer

libavutil/buffer.c:361–388

allocate a new buffer and override its free() callback so that * it is returned to the pool on free */

/* allocate a new buffer and override its free() callback so that
 * it is returned to the pool on free */
static AVBufferRef *pool_alloc_buffer(AVBufferPool *pool)
{
    BufferPoolEntry *buf;
    AVBufferRef     *ret;

    av_assert0(pool->alloc || pool->alloc2);

    ret = pool->alloc2 ? pool->alloc2(pool->opaque, pool->size) :
                         pool->alloc(pool->size);
    if (!ret)
        return NULL;

    buf = av_mallocz(sizeof(*buf));
    if (!buf) {
        av_buffer_unref(&ret);
        return NULL;
    }

    buf->data   = ret->buffer->data;
    buf->opaque = ret->buffer->opaque;
    buf->free   = ret->buffer->free;
    buf->pool   = pool;

    ret->buffer->opaque = buf;
    ret->buffer->free   = pool_release_buffer;

    return ret;
}

AVBufferRef *av_buffer_pool_get(AVBufferPool *pool)
{