+ buf_descriptor = av_malloc(sizeof(struct buff_data));
+ if (buf_descriptor == NULL) {
+ /* Something went wrong... Since av_malloc() failed, we cannot even
+ * allocate a buffer for memcpying into it
+ */
+ av_log(ctx, AV_LOG_ERROR, "Failed to allocate a buffer descriptor\n");
+ res = ioctl(s->fd, VIDIOC_QBUF, &buf);
+
+ return AVERROR(ENOMEM);
+ }
+ buf_descriptor->fd = s->fd;
+ buf_descriptor->index = buf.index;
+ buf_descriptor->s = s;
+
+ pkt->buf = av_buffer_create(pkt->data, pkt->size, mmap_release_buffer,
+ buf_descriptor, 0);
+ if (!pkt->buf) {
+ av_freep(&buf_descriptor);
+ return AVERROR(ENOMEM);
+ }