From a3291ef360f3d16212252005f181c49e6efcef3e Mon Sep 17 00:00:00 2001
From: Chris Robinson <chris.kcat@gmail.com>
Date: Wed, 28 Mar 2012 05:19:35 -0700
Subject: [PATCH] Add a sound method to update the volume

---
 apps/openmw/mwsound/openal_output.cpp | 16 ++++++++++++++++
 apps/openmw/mwsound/sound.hpp         |  1 +
 2 files changed, 17 insertions(+)

diff --git a/apps/openmw/mwsound/openal_output.cpp b/apps/openmw/mwsound/openal_output.cpp
index 6e5806ee3..032d79ab8 100644
--- a/apps/openmw/mwsound/openal_output.cpp
+++ b/apps/openmw/mwsound/openal_output.cpp
@@ -89,6 +89,7 @@ public:
 
     virtual void stop();
     virtual bool isPlaying();
+    virtual void setVolume(float volume);
     virtual void update(const float *pos);
 
     void play();
@@ -252,6 +253,13 @@ bool OpenAL_SoundStream::isPlaying()
     return !mIsFinished;
 }
 
+void OpenAL_SoundStream::setVolume(float volume)
+{
+    alSourcef(mSource, AL_GAIN, volume*mBaseVolume);
+    throwALerror();
+    mVolume = volume;
+}
+
 void OpenAL_SoundStream::update(const float *pos)
 {
     alSource3f(mSource, AL_POSITION, pos[0], pos[2], -pos[1]);
@@ -329,6 +337,7 @@ public:
 
     virtual void stop();
     virtual bool isPlaying();
+    virtual void setVolume(float volume);
     virtual void update(const float *pos);
 };
 
@@ -361,6 +370,13 @@ bool OpenAL_Sound::isPlaying()
     return state==AL_PLAYING;
 }
 
+void OpenAL_Sound::setVolume(float volume)
+{
+    alSourcef(mSource, AL_GAIN, volume*mBaseVolume);
+    throwALerror();
+    mVolume = volume;
+}
+
 void OpenAL_Sound::update(const float *pos)
 {
     alSource3f(mSource, AL_POSITION, pos[0], pos[2], -pos[1]);
diff --git a/apps/openmw/mwsound/sound.hpp b/apps/openmw/mwsound/sound.hpp
index a5617bc5a..b5d010aa0 100644
--- a/apps/openmw/mwsound/sound.hpp
+++ b/apps/openmw/mwsound/sound.hpp
@@ -7,6 +7,7 @@ namespace MWSound
     {
         virtual void stop() = 0;
         virtual bool isPlaying() = 0;
+        virtual void setVolume(float volume) = 0;
         virtual void update(const float *pos) = 0;
 
         Sound& operator=(const Sound &rhs);