+ pa_return_val_if_fail(!data->sync_base || (data->sync_base->sink == data->sink
+ && pa_sink_input_get_state(data->sync_base) == PA_SINK_INPUT_CORKED),
+ -PA_ERR_INVALID);
+
+ /* Routing is done. We have a sink and a format. */
+
+ if (data->volume_is_set && pa_format_info_is_pcm(data->format)) {
+ /* If volume is set, we need to save the original data->channel_map,
+ * so that we can remap the volume from the original channel map to the
+ * final channel map of the stream in case data->channel_map gets
+ * modified in pa_format_info_to_sample_spec2(). */
+ r = pa_stream_get_volume_channel_map(&data->volume, data->channel_map_is_set ? &data->channel_map : NULL, data->format, &volume_map);
+ if (r < 0)
+ return r;
+ }
+
+ /* Now populate the sample spec and channel map according to the final
+ * format that we've negotiated */
+ r = pa_format_info_to_sample_spec2(data->format, &data->sample_spec, &data->channel_map, &data->sink->sample_spec,
+ &data->sink->channel_map);
+ if (r < 0)
+ return r;