From 6857286b421aafcec79bbd9c0321e8d988ab09e8 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max.kellermann@gmail.com>
Date: Fri, 8 Jul 2022 16:18:31 +0200
Subject: [PATCH] decoder/Thread: don't scan for replay gain tags in PCM
 streams

This disables a long delay for playing songs from the cdio_paranoia
input plugin if ReplayGain is enabled.
---
 NEWS                   | 1 +
 src/decoder/Thread.cxx | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/NEWS b/NEWS
index 89bda0ed6..c9f5e3919 100644
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,7 @@ ver 0.23.8 (not yet released)
 * input
   - cdio_paranoia: fix crash if no drive was found
   - cdio_paranoia: faster cancellation
+  - cdio_paranoia: don't scan for replay gain tags
 * output
   - pipewire: fix crash with PipeWire 0.3.53
 * mixer
diff --git a/src/decoder/Thread.cxx b/src/decoder/Thread.cxx
index 4432c6605..c9635e70b 100644
--- a/src/decoder/Thread.cxx
+++ b/src/decoder/Thread.cxx
@@ -36,6 +36,7 @@
 #include "util/RuntimeError.hxx"
 #include "util/Domain.hxx"
 #include "util/ScopeExit.hxx"
+#include "util/StringCompare.hxx"
 #include "thread/Name.hxx"
 #include "tag/ApeReplayGain.hxx"
 #include "Log.hxx"
@@ -265,6 +266,13 @@ MaybeLoadReplayGain(DecoderBridge &bridge, InputStream &is)
 		/* ReplayGain is disabled */
 		return;
 
+	if (is.HasMimeType() &&
+	    StringStartsWith(is.GetMimeType(), "audio/x-mpd-"))
+		/* skip for (virtual) files (e.g. from the
+		   cdio_paranoia input plugin) which cannot possibly
+		   contain tags */
+		return;
+
 	LoadReplayGain(bridge, is);
 }