+
+int ff_add_param_change(AVPacket *pkt, int32_t channels,
+ uint64_t channel_layout, int32_t sample_rate,
+ int32_t width, int32_t height)
+{
+ uint32_t flags = 0;
+ int size = 4;
+ uint8_t *data;
+ if (!pkt)
+ return AVERROR(EINVAL);
+ if (channels) {
+ size += 4;
+ flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT;
+ }
+ if (channel_layout) {
+ size += 8;
+ flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT;
+ }
+ if (sample_rate) {
+ size += 4;
+ flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE;
+ }
+ if (width || height) {
+ size += 8;
+ flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS;
+ }
+ data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size);
+ if (!data)
+ return AVERROR(ENOMEM);
+ bytestream_put_le32(&data, flags);
+ if (channels)
+ bytestream_put_le32(&data, channels);
+ if (channel_layout)
+ bytestream_put_le64(&data, channel_layout);
+ if (sample_rate)
+ bytestream_put_le32(&data, sample_rate);
+ if (width || height) {
+ bytestream_put_le32(&data, width);
+ bytestream_put_le32(&data, height);
+ }
+ return 0;
+}