From d83a092ae6271c78a66e1ef3de6e6f6eb40a566e Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Sat, 21 Apr 2012 03:26:29 +0300
Subject: Add audio frequency and audio channels settings.

---
 src/defaults.cpp        |  2 ++
 src/gui/setup_audio.cpp | 16 +++++++++++++++-
 src/gui/setup_audio.h   |  3 +++
 src/sound.cpp           | 17 +++++++++++++++--
 4 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/src/defaults.cpp b/src/defaults.cpp
index 5b4641f1a..6933c7356 100644
--- a/src/defaults.cpp
+++ b/src/defaults.cpp
@@ -247,6 +247,8 @@ DefaultsData* getConfigDefaults()
 #if defined(WIN32) || defined(__APPLE__)
     AddDEF(configData, "centerwindow", true);
 #endif
+    AddDEF(configData, "audioFrequency", 22010);
+    AddDEF(configData, "audioChannels", 2);
     return configData;
 }
 
diff --git a/src/gui/setup_audio.cpp b/src/gui/setup_audio.cpp
index 69ca4e759..c5efa63ad 100644
--- a/src/gui/setup_audio.cpp
+++ b/src/gui/setup_audio.cpp
@@ -31,7 +31,6 @@
 #include "gui/widgets/layouthelper.h"
 #include "gui/widgets/namesmodel.h"
 #include "gui/widgets/scrollarea.h"
-#include "gui/widgets/setupitem.h"
 
 #include "utils/gettext.h"
 
@@ -80,6 +79,18 @@ Setup_Audio::Setup_Audio()
     new SetupItemSlider(_("Music volume"), "", "musicVolume",
         this, "musicVolumeEvent", 0, sound.getMaxVolume(), 150, true);
 
+    new SetupItemIntTextField(_("Audio frequency"), "",
+        "audioFrequency", this, "audioFrequencyEvent", 14000, 192000);
+
+    mChannelsList = new SetupItemNames();
+    mChannelsList->push_back(_("mono"));
+    mChannelsList->push_back(_("stereo"));
+    mChannelsList->push_back(_("surround"));
+    mChannelsList->push_back(_("surround+center+lfe"));
+    new SetupItemSlider2(_("Audio channels"), "", "audioChannels", this,
+        "audioChannels", 1, 4, mChannelsList);
+
+
     new SetupItemLabel(_("Sound effects"), "", this);
 
     new SetupItemSound(_("Information dialog sound"), "",
@@ -121,6 +132,9 @@ Setup_Audio::~Setup_Audio()
 {
     delete mSoundModel;
     mSoundModel = nullptr;
+
+    delete mChannelsList;
+    mChannelsList = nullptr;
 }
 
 void Setup_Audio::apply()
diff --git a/src/gui/setup_audio.h b/src/gui/setup_audio.h
index 21b661bcb..e79beaab0 100644
--- a/src/gui/setup_audio.h
+++ b/src/gui/setup_audio.h
@@ -25,6 +25,7 @@
 
 #include "guichanfwd.h"
 
+#include "gui/widgets/setupitem.h"
 #include "gui/widgets/setuptabscroll.h"
 
 #include <guichan/actionlistener.hpp>
@@ -40,6 +41,8 @@ class Setup_Audio : public SetupTabScroll
 
     private:
         gcn::ListModel *mSoundModel;
+
+        SetupItemNames *mChannelsList;
 };
 
 #endif
diff --git a/src/sound.cpp b/src/sound.cpp
index 5b7f1201d..bc3953127 100644
--- a/src/sound.cpp
+++ b/src/sound.cpp
@@ -110,9 +110,22 @@ void Sound::init()
     }
 
     const size_t audioBuffer = 4096;
+    int channels = config.getIntValue("audioChannels");
+    switch (channels)
+    {
+        case 3:
+            channels = 4;
+            break;
+        case 4:
+            channels = 6;
+            break;
+        default:
+            break;
+    }
+
+    const int res = Mix_OpenAudio(config.getIntValue("audioFrequency"),
+        MIX_DEFAULT_FORMAT, channels, audioBuffer);
 
-    const int res = Mix_OpenAudio(MIX_DEFAULT_FREQUENCY, MIX_DEFAULT_FORMAT,
-                                  MIX_DEFAULT_CHANNELS, audioBuffer);
     if (res < 0)
     {
         logger->log("Sound::init Could not initialize audio: %s",
-- 
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