From ac6b4d3830b1ed1a1446ecb57009456306ef008d Mon Sep 17 00:00:00 2001
From: Ray <raysan5@gmail.com>
Date: Mon, 6 Feb 2017 00:44:54 +0100
Subject: [PATCH] Added audio function: SetMasterVolume()

---
 src/audio.c  | 33 ++++++++++++++++++++++-----------
 src/raylib.h |  1 +
 2 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/src/audio.c b/src/audio.c
index 22da74be..e669eceb 100644
--- a/src/audio.c
+++ b/src/audio.c
@@ -177,9 +177,11 @@ void InitAudioDevice(void)
             TraceLog(INFO, "Audio device and context initialized successfully: %s", alcGetString(device, ALC_DEVICE_SPECIFIER));
 
             // Listener definition (just for 2D)
-            alListener3f(AL_POSITION, 0, 0, 0);
-            alListener3f(AL_VELOCITY, 0, 0, 0);
-            alListener3f(AL_ORIENTATION, 0, 0, -1);
+            alListener3f(AL_POSITION, 0.0f, 0.0f, 0.0f);
+            alListener3f(AL_VELOCITY, 0.0f, 0.0f, 0.0f);
+            alListener3f(AL_ORIENTATION, 0.0f, 0.0f, -1.0f);
+            
+            alListenerf(AL_GAIN, 1.0f);
         }
     }
 }
@@ -216,6 +218,15 @@ bool IsAudioDeviceReady(void)
     }
 }
 
+// Set master volume (listener)
+void SetMasterVolume(float volume)
+{
+    if (volume < 0.0f) volume = 0.0f;
+    else if (volume > 1.0f) volume = 1.0f;
+    
+    alListenerf(AL_GAIN, volume);
+}
+
 //----------------------------------------------------------------------------------
 // Module Functions Definition - Sounds loading and playing (.WAV)
 //----------------------------------------------------------------------------------
@@ -313,10 +324,10 @@ Sound LoadSoundFromWave(Wave wave)
         ALuint source;
         alGenSources(1, &source);            // Generate pointer to audio source
 
-        alSourcef(source, AL_PITCH, 1);
-        alSourcef(source, AL_GAIN, 1);
-        alSource3f(source, AL_POSITION, 0, 0, 0);
-        alSource3f(source, AL_VELOCITY, 0, 0, 0);
+        alSourcef(source, AL_PITCH, 1.0f);
+        alSourcef(source, AL_GAIN, 1.0f);
+        alSource3f(source, AL_POSITION, 0.0f, 0.0f, 0.0f);
+        alSource3f(source, AL_VELOCITY, 0.0f, 0.0f, 0.0f);
         alSourcei(source, AL_LOOPING, AL_FALSE);
 
         // Convert loaded data to OpenAL buffer
@@ -899,10 +910,10 @@ AudioStream InitAudioStream(unsigned int sampleRate, unsigned int sampleSize, un
 
     // Create an audio source
     alGenSources(1, &stream.source);
-    alSourcef(stream.source, AL_PITCH, 1);
-    alSourcef(stream.source, AL_GAIN, 1);
-    alSource3f(stream.source, AL_POSITION, 0, 0, 0);
-    alSource3f(stream.source, AL_VELOCITY, 0, 0, 0);
+    alSourcef(stream.source, AL_PITCH, 1.0f);
+    alSourcef(stream.source, AL_GAIN, 1.0f);
+    alSource3f(stream.source, AL_POSITION, 0.0f, 0.0f, 0.0f);
+    alSource3f(stream.source, AL_VELOCITY, 0.0f, 0.0f, 0.0f);
 
     // Create Buffers (double buffering)
     alGenBuffers(MAX_STREAM_BUFFERS, stream.buffers);
diff --git a/src/raylib.h b/src/raylib.h
index 5a1304fc..85cad6c3 100644
--- a/src/raylib.h
+++ b/src/raylib.h
@@ -947,6 +947,7 @@ RLAPI void ToggleVrMode(void);                    // Enable/Disable VR experienc
 RLAPI void InitAudioDevice(void);                                     // Initialize audio device and context
 RLAPI void CloseAudioDevice(void);                                    // Close the audio device and context
 RLAPI bool IsAudioDeviceReady(void);                                  // Check if audio device has been initialized successfully
+RLAPI void SetMasterVolume(float volume);                             // Set master volume (listener)
 
 RLAPI Wave LoadWave(const char *fileName);                            // Load wave data from file
 RLAPI Wave LoadWaveEx(void *data, int sampleCount, int sampleRate, int sampleSize, int channels); // Load wave data from raw array data