IOS: added audio output

CMakeLists.txt

@@ -428,8 +428,10 @@ elseif(IOS)
 		ios/AppDelegate.m
 		ios/AppDelegate.h
 		ios/ViewController.mm
-		ios/ViewController.h)
-	set(nativeExtraLibs ${nativeExtraLibs} "-framework Foundation -framework AudioToolbox -framework CoreGraphics -framework QuartzCore -framework OpenGLES -framework UIKit -framework GLKit")
+		ios/ViewController.h
+        ios/AudioEngine.mm
+        ios/AudioEngine.h)
+	set(nativeExtraLibs ${nativeExtraLibs} "-framework Foundation -framework AudioToolbox -framework CoreGraphics -framework QuartzCore -framework OpenGLES -framework UIKit -framework GLKit -framework AudioToolbox -framework OpenAL")
 	set(TargetBin PPSSPP)
 elseif(USING_QT_UI)
 	# Currently unused

ios/AudioEngine.h

@@ -0,0 +1,13 @@
+//
+//  AudioEngine.h
+//  PPSSPP
+//
+//  Created by rock88 on 15/03/2013.
+//  Copyright (c) 2013 Homebrew. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface AudioEngine : NSObject
+
+@end

ios/AudioEngine.mm

@@ -0,0 +1,138 @@
+//
+//  AudioEngine.mm
+//  PPSSPP
+//
+//  Created by rock88 on 15/03/2013.
+//  Copyright (c) 2013 Homebrew. All rights reserved.
+//
+
+#import "AudioEngine.h"
+#import <OpenAL/al.h>
+#import <OpenAL/alc.h>
+#import <AudioToolbox/AudioToolbox.h>
+#import <AVFoundation/AVFoundation.h>
+
+#import <string>
+
+static volatile BOOL done = 0;
+
+#define SAMPLE_SIZE 44100/6
+static short stream[SAMPLE_SIZE];
+
+void NativeMix(short *audio, int num_samples);
+
+@interface AudioEngine ()
+
+@property (nonatomic,assign) ALCdevice *alcDevice;
+@property (nonatomic,assign) ALCcontext *alContext;
+@property (nonatomic,assign) ALuint buffer;
+@property (nonatomic,assign) ALuint source;
+
+@end
+
+@implementation AudioEngine
+@synthesize alcDevice,alContext,buffer,source;
+
+- (id)init
+{
+    self = [super init];
+    if (self)
+    {
+        [self audioInit];
+        [self audioLoop];
+    }
+    return self;
+}
+
+- (void)dealloc
+{
+    [self audioShutdown];
+    [super dealloc];
+}
+
+- (void)checkALError
+{
+    ALenum ErrCode;
+    std::string Err = "OpenAL error: ";
+    if ((ErrCode = alGetError()) != AL_NO_ERROR)
+    {
+        Err += (char *)alGetString(ErrCode);
+        printf("%s\n",Err.c_str());
+    }
+}
+
+- (void)audioInit
+{
+    done = 0;
+    alcDevice = alcOpenDevice(NULL);
+    
+    if (alcDevice)
+    {
+        NSLog(@"OpenAL device opened: %s",alcGetString(alcDevice, ALC_DEVICE_SPECIFIER));
+    }
+    else
+    {
+        NSLog(@"WARNING: could not open OpenAL device");
+        return;
+    }
+    
+    alContext = alcCreateContext(alcDevice, NULL);
+    
+    if (alContext)
+    {
+        alcMakeContextCurrent(alContext);
+    }
+    else
+    {
+        NSLog(@"ERROR: no OpenAL context");
+        return;
+    }
+    
+    alGenSources(1, &source);
+    alGenBuffers(1, &buffer);
+}
+
+- (void)audioShutdown
+{
+    done = 1;
+    alcMakeContextCurrent(NULL);
+    
+    if (alContext)
+    {
+        alcDestroyContext(alContext);
+        alContext = NULL;
+    }
+    
+    if (alcDevice)
+    {
+        alcCloseDevice(alcDevice);
+        alcDevice = NULL;
+    }
+}
+
+- (bool)playing
+{
+    ALenum state;
+    alGetSourcei(source, AL_SOURCE_STATE, &state);
+    return (state == AL_PLAYING);
+}
+
+- (void)audioLoop
+{
+    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(void){
+        while (!done)
+        {
+            if (![self playing])
+            {
+                NativeMix(stream, SAMPLE_SIZE/2);
+                
+                alSourcei(source, AL_BUFFER, 0);
+                alBufferData(buffer, AL_FORMAT_STEREO16, stream, SAMPLE_SIZE, 44100);
+                alSourcei(source, AL_BUFFER, buffer);
+                alSourcePlay(source);
+            }
+        }
+    });
+}
+
+@end

ios/ViewController.mm

@@ -6,6 +6,7 @@
 //
 
 #import "ViewController.h"
+#import "AudioEngine.h"
 #import <GLKit/GLKit.h>
 
 #include "base/display.h"
@@ -41,11 +42,12 @@ ViewController* sharedViewController;
 @property (nonatomic,retain) NSString* documentsPath;
 @property (nonatomic,retain) NSString* bundlePath;
 @property (nonatomic,retain) NSMutableArray* touches;
+@property (nonatomic,retain) AudioEngine* audioEngine;
 
 @end
 
 @implementation ViewController
-@synthesize documentsPath,bundlePath,touches;
+@synthesize documentsPath,bundlePath,touches,audioEngine;
 
 - (id)init
 {
@@ -104,7 +106,9 @@ ViewController* sharedViewController;
 
 	dp_xscale = (float)dp_xres / (float)pixel_xres;
 	dp_yscale = (float)dp_yres / (float)pixel_yres;
-
+    
+    if (g_Config.bEnableSound)
+        self.audioEngine = [[[AudioEngine alloc] init] autorelease];
 /*
 	UISwipeGestureRecognizer* gesture = [[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)] autorelease];
 	[self.view addGestureRecognizer:gesture];
@@ -129,7 +133,8 @@ ViewController* sharedViewController;
 - (void)dealloc
 {
 	[self viewDidUnload];
-
+    
+    self.audioEngine = nil;
 	self.touches = nil;
 	self.documentsPath = nil;
 	self.bundlePath = nil;