sink-input: Add a format-lost event

This event is emitted if the sink-input could not be moved to a new sink
because it doesn't support the format of the sink-input. Clients can
reconnect their stream with a different format if they wish or
gracefully exit.

2 files changed, 9 insertions, 1 deletions

diff --git a/src/pulse/def.h b/src/pulse/def.h
index 91a027e3..e01e667f 100644
--- a/src/pulse/def.h
+++ b/src/pulse/def.h
@@ -912,6 +912,13 @@ typedef void (*pa_free_cb_t)(void *p);
  * information, \since 0.9.15 */
 #define PA_STREAM_EVENT_REQUEST_UNCORK "request-uncork"
 
+/** A stream event notifying that the stream is going to be
+ * disconnected because the underlying sink changed and no longer
+ * supports the format that was originally negotiated. Clients need
+ * to connect a new stream to renegotiate a format and continue
+ * playback, \since 1.0 */
+#define PA_STREAM_EVENT_FORMAT_LOST "format-lost"
+
 PA_C_DECL_END
 
 #endif
diff --git a/src/pulsecore/sink-input.c b/src/pulsecore/sink-input.c
index 196d7712..f0558f40 100644
--- a/src/pulsecore/sink-input.c
+++ b/src/pulsecore/sink-input.c
@@ -1594,7 +1594,8 @@ int pa_sink_input_finish_move(pa_sink_input *i, pa_sink *dest, pa_bool_t save) {
         return -PA_ERR_NOTSUPPORTED;
 
     if (pa_sink_input_is_passthrough(i) && !pa_sink_check_format(dest, i->format)) {
-        /* FIXME: Fire a message here so the client can renegotiate */
+        pa_log_debug("New sink doesn't support stream format, sending format-changed and killing");
+        pa_sink_input_send_event(i, PA_STREAM_EVENT_FORMAT_LOST, NULL);
         return -PA_ERR_NOTSUPPORTED;
     }