output/PipeWire: ignore SPA_PROP_channelVolumes if n_values==0

After connecting, PipeWire sometimes sends SPA_PROP_channelVolumes with no values, and this led to "volume=-NaN".

output/PipeWire: ignore SPA_PROP_channelVolumes if n_values==0
e807ed58 · Max Kellermann · f0894425 · e807ed58
Commit e807ed58 authored Jul 08, 2022 by Max Kellermann
Hide whitespace changes
Inline Side-by-side

Showing with 3 additions and 0 deletions

PipeWireOutputPlugin.cxx src/output/plugins/PipeWireOutputPlugin.cxx +3 -0

No files found.
--- a/src/output/plugins/PipeWireOutputPlugin.cxx
+++ b/src/output/plugins/PipeWireOutputPlugin.cxx
@@ -223,6 +223,9 @@ private:
 	}

 	void OnChannelVolumes(const struct pw_stream_control &control) noexcept {
+		if (control.n_values < 1)
+			return;
+
 		float sum = std::accumulate(control.values,
 					    control.values + control.n_values,
 					    0.0f);