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From 547a084c7ed95c09136159623240b7c92f6a2f5e Mon Sep 17 00:00:00 2001
From: Max Kellermann <max.kellermann@gmail.com>
Date: Fri, 8 Jul 2022 23:38:45 +0200
Subject: [PATCH] output/PipeWire: call pw_stream_flush() in Cancel()

Clear not only MPD's ring buffer, but also libpipewire's buffers, to
avoid playing some audio from the previous song after a manual song
change.

Fixes part 1 of https://github.com/MusicPlayerDaemon/MPD/issues/1354

Upstream-Status: Backport [https://github.com/MusicPlayerDaemon/MPD/commit/547a084c7ed95c09136159623240b7c92f6a2f5e]
Signed-off-by: Scott Murray <scott.murray@konsulko.com>

---
diff --git a/src/output/plugins/PipeWireOutputPlugin.cxx b/src/output/plugins/PipeWireOutputPlugin.cxx
index 7184edfa5..0f8550d41 100644
--- a/src/output/plugins/PipeWireOutputPlugin.cxx
+++ b/src/output/plugins/PipeWireOutputPlugin.cxx
@@ -895,7 +895,12 @@ PipeWireOutput::Cancel() noexcept
 	if (drained)
 		return;
 
+	/* clear MPD's ring buffer */
 	ring_buffer->reset();
+
+	/* clear libpipewire's buffer */
+	pw_stream_flush(stream, false);
+	drained = true;
 }
 
 bool
-- 
2.39.0