From 625a0dff3aa48eda08e120e04cc6d4ef71499fcd Mon Sep 17 00:00:00 2001
From: Andrzej Rybczak <electricityispower@gmail.com>
Date: Sun, 12 Mar 2017 12:34:45 +0100
Subject: [PATCH] Use volume command for relative volume changes instead of
 setvol

---
 src/actions.cpp | 6 ++----
 src/mpdpp.cpp   | 8 ++++++++
 src/mpdpp.h     | 3 ++-
 3 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/src/actions.cpp b/src/actions.cpp
index 86b49a7b..dcea819f 100644
--- a/src/actions.cpp
+++ b/src/actions.cpp
@@ -623,14 +623,12 @@ void SlaveScreen::run()
 
 void VolumeUp::run()
 {
-	int volume = std::min(Status::State::volume()+Config.volume_change_step, 100u);
-	Mpd.SetVolume(volume);
+	Mpd.ChangeVolume(static_cast<int>(Config.volume_change_step));
 }
 
 void VolumeDown::run()
 {
-	int volume = std::max(int(Status::State::volume()-Config.volume_change_step), 0);
-	Mpd.SetVolume(volume);
+	Mpd.ChangeVolume(-static_cast<int>(Config.volume_change_step));
 }
 
 bool AddItemToPlaylist::canBeRun()
diff --git a/src/mpdpp.cpp b/src/mpdpp.cpp
index 177340ba..906ed909 100644
--- a/src/mpdpp.cpp
+++ b/src/mpdpp.cpp
@@ -472,6 +472,14 @@ void Connection::SetVolume(unsigned vol)
 	checkErrors();
 }
 
+void Connection::ChangeVolume(int change)
+{
+	prechecksNoCommandsList();
+	mpd_run_change_volume(m_connection.get(), change);
+	checkErrors();
+}
+
+
 std::string Connection::GetReplayGainMode()
 {
 	prechecksNoCommandsList();
diff --git a/src/mpdpp.h b/src/mpdpp.h
index bf1fcb9c..db336760 100644
--- a/src/mpdpp.h
+++ b/src/mpdpp.h
@@ -536,7 +536,8 @@ struct Connection
 	void SetConsume(bool);
 	void SetCrossfade(unsigned);
 	void SetVolume(unsigned int vol);
-	
+	void ChangeVolume(int change);
+
 	std::string GetReplayGainMode();
 	void SetReplayGainMode(ReplayGainMode);