Browse Source

Added very basic support for sound (via AL), also uses CDOpenALSupport

master
Joshua Moerman 10 years ago
parent
commit
029347619b
  1. 31
      J.xcodeproj/project.pbxproj
  2. 77
      J/CDOpenALSupport.h
  3. 250
      J/CDOpenALSupport.m
  4. 115
      J/sound.h

31
J.xcodeproj/project.pbxproj

@ -11,12 +11,17 @@
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425E9DFB140A846700A81A65 /* QuartzCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 425E9DFA140A846700A81A65 /* QuartzCore.framework */; };
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425E9E02140A96C400A81A65 /* J.h in Headers */ = {isa = PBXBuildFile; fileRef = 4268136D140A321800CBF943 /* J.h */; settings = {ATTRIBUTES = (); }; };
42681369140A321800CBF943 /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 42681368140A321800CBF943 /* Foundation.framework */; };
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4283A4641411707700036A5D /* array.h in Headers */ = {isa = PBXBuildFile; fileRef = 4283A4631411707700036A5D /* array.h */; };
429E3BAB159616FD0044306C /* texture_objc.mm in Sources */ = {isa = PBXBuildFile; fileRef = 429E3BAA159616FD0044306C /* texture_objc.mm */; };
42C7D6C016B31E7200DA372A /* sound.h in Headers */ = {isa = PBXBuildFile; fileRef = 42C7D6BF16B31E7200DA372A /* sound.h */; };
42C7D6C316B31E8B00DA372A /* CDOpenALSupport.h in Headers */ = {isa = PBXBuildFile; fileRef = 42C7D6C116B31E8B00DA372A /* CDOpenALSupport.h */; };
42C7D6C416B31E8B00DA372A /* CDOpenALSupport.m in Sources */ = {isa = PBXBuildFile; fileRef = 42C7D6C216B31E8B00DA372A /* CDOpenALSupport.m */; };
42C7D6CA16B31F1900DA372A /* OpenAL.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 42C7D6C616B31EE200DA372A /* OpenAL.framework */; };
42C7D6CB16B31F1E00DA372A /* AudioToolbox.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 42C7D6C816B31EE800DA372A /* AudioToolbox.framework */; };
42ED6A6B140A380000402F76 /* fbo.h in Headers */ = {isa = PBXBuildFile; fileRef = 42ED6A68140A380000402F76 /* fbo.h */; };
42ED6A6C140A380000402F76 /* shader.h in Headers */ = {isa = PBXBuildFile; fileRef = 42ED6A69140A380000402F76 /* shader.h */; };
42ED6A6D140A380000402F76 /* to_string.h in Headers */ = {isa = PBXBuildFile; fileRef = 42ED6A6A140A380000402F76 /* to_string.h */; };
@ -37,6 +42,11 @@
429E3BA715960FCA0044306C /* texture.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = texture.h; sourceTree = "<group>"; };
429E3BA9159616C00044306C /* texture_objc.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = texture_objc.h; sourceTree = "<group>"; };
429E3BAA159616FD0044306C /* texture_objc.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = texture_objc.mm; sourceTree = "<group>"; };
42C7D6BF16B31E7200DA372A /* sound.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = sound.h; sourceTree = "<group>"; };
42C7D6C116B31E8B00DA372A /* CDOpenALSupport.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = CDOpenALSupport.h; sourceTree = "<group>"; };
42C7D6C216B31E8B00DA372A /* CDOpenALSupport.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = CDOpenALSupport.m; sourceTree = "<group>"; };
42C7D6C616B31EE200DA372A /* OpenAL.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = OpenAL.framework; path = System/Library/Frameworks/OpenAL.framework; sourceTree = SDKROOT; };
42C7D6C816B31EE800DA372A /* AudioToolbox.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = AudioToolbox.framework; path = System/Library/Frameworks/AudioToolbox.framework; sourceTree = SDKROOT; };
42ED6A68140A380000402F76 /* fbo.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = fbo.h; sourceTree = "<group>"; };
42ED6A69140A380000402F76 /* shader.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = shader.h; sourceTree = "<group>"; };
42ED6A6A140A380000402F76 /* to_string.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = to_string.h; sourceTree = "<group>"; };
@ -47,6 +57,8 @@
isa = PBXFrameworksBuildPhase;
buildActionMask = 2147483647;
files = (
42C7D6CB16B31F1E00DA372A /* AudioToolbox.framework in Frameworks */,
42C7D6CA16B31F1900DA372A /* OpenAL.framework in Frameworks */,
425E9DFB140A846700A81A65 /* QuartzCore.framework in Frameworks */,
42681369140A321800CBF943 /* Foundation.framework in Frameworks */,
);
@ -87,6 +99,8 @@
42681367140A321800CBF943 /* Frameworks */ = {
isa = PBXGroup;
children = (
42C7D6C816B31EE800DA372A /* AudioToolbox.framework */,
42C7D6C616B31EE200DA372A /* OpenAL.framework */,
425E9DFA140A846700A81A65 /* QuartzCore.framework */,
42681368140A321800CBF943 /* Foundation.framework */,
);
@ -96,6 +110,7 @@
4268136A140A321800CBF943 /* J */ = {
isa = PBXGroup;
children = (
42C7D6BE16B31E5400DA372A /* AL */,
4283A46114115AD400036A5D /* GL */,
4283A46214116ECB00036A5D /* utils */,
4268136D140A321800CBF943 /* J.h */,
@ -136,6 +151,16 @@
name = utils;
sourceTree = "<group>";
};
42C7D6BE16B31E5400DA372A /* AL */ = {
isa = PBXGroup;
children = (
42C7D6C116B31E8B00DA372A /* CDOpenALSupport.h */,
42C7D6C216B31E8B00DA372A /* CDOpenALSupport.m */,
42C7D6BF16B31E7200DA372A /* sound.h */,
);
name = AL;
sourceTree = "<group>";
};
/* End PBXGroup section */
/* Begin PBXHeadersBuildPhase section */
@ -150,6 +175,8 @@
425E9DF2140A74DA00A81A65 /* basic.h in Headers */,
4283A45F14115AC400036A5D /* interpolator.h in Headers */,
4283A4641411707700036A5D /* array.h in Headers */,
42C7D6C016B31E7200DA372A /* sound.h in Headers */,
42C7D6C316B31E8B00DA372A /* CDOpenALSupport.h in Headers */,
);
runOnlyForDeploymentPostprocessing = 0;
};
@ -207,6 +234,8 @@
4268136F140A321800CBF943 /* J.mm in Sources */,
425E9DF6140A774D00A81A65 /* basic.cpp in Sources */,
425E9DF9140A7EB400A81A65 /* fbo.mm in Sources */,
429E3BAB159616FD0044306C /* texture_objc.mm in Sources */,
42C7D6C416B31E8B00DA372A /* CDOpenALSupport.m in Sources */,
);
runOnlyForDeploymentPostprocessing = 0;
};

77
J/CDOpenALSupport.h

@ -0,0 +1,77 @@
/*
Disclaimer: IMPORTANT: This Apple software is supplied to you by
Apple Inc. ("Apple") in consideration of your agreement to the
following terms, and your use, installation, modification or
redistribution of this Apple software constitutes acceptance of these
terms. If you do not agree with these terms, please do not use,
install, modify or redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and
subject to these terms, Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this original Apple software (the
"Apple Software"), to use, reproduce, modify and redistribute the Apple
Software, with or without modifications, in source and/or binary forms;
provided that if you redistribute the Apple Software in its entirety and
without modifications, you must retain this notice and the following
text and disclaimers in all such redistributions of the Apple Software.
Neither the name, trademarks, service marks or logos of Apple Inc.
may be used to endorse or promote products derived from the Apple
Software without specific prior written permission from Apple. Except
as expressly stated in this notice, no other rights or licenses, express
or implied, are granted by Apple herein, including but not limited to
any patent rights that may be infringed by your derivative works or by
other works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Copyright (C) 2009 Apple Inc. All Rights Reserved.
$Id$
*/
/*
This file contains code from version 1.1 and 1.4 of MyOpenALSupport.h taken from Apple's oalTouch version.
The 1.4 version code is used for loading IMA4 files, however, this code causes very noticeable clicking
when used to load wave files that are looped so the 1.1 version code is used specifically for loading
wav files.
*/
#ifndef __CD_OPENAL_H
#define __CD_OPENAL_H
#ifdef __cplusplus
extern "C" {
#endif
#include <OpenAL/al.h>
#include <OpenAL/alc.h>
#include <CoreFoundation/CFURL.h>
//Taken from oalTouch MyOpenALSupport 1.1
void* CDloadWaveAudioData(CFURLRef inFileURL, ALsizei *outDataSize, ALenum *outDataFormat, ALsizei* outSampleRate);
void* CDloadCafAudioData(CFURLRef inFileURL, ALsizei *outDataSize, ALenum *outDataFormat, ALsizei* outSampleRate);
void* CDGetOpenALAudioData(CFURLRef inFileURL, ALsizei *outDataSize, ALenum *outDataFormat, ALsizei* outSampleRate);
#ifdef __cplusplus
}
#endif
#endif

250
J/CDOpenALSupport.m

@ -0,0 +1,250 @@
/*
Disclaimer: IMPORTANT: This Apple software is supplied to you by
Apple Inc. ("Apple") in consideration of your agreement to the
following terms, and your use, installation, modification or
redistribution of this Apple software constitutes acceptance of these
terms. If you do not agree with these terms, please do not use,
install, modify or redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and
subject to these terms, Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this original Apple software (the
"Apple Software"), to use, reproduce, modify and redistribute the Apple
Software, with or without modifications, in source and/or binary forms;
provided that if you redistribute the Apple Software in its entirety and
without modifications, you must retain this notice and the following
text and disclaimers in all such redistributions of the Apple Software.
Neither the name, trademarks, service marks or logos of Apple Inc.
may be used to endorse or promote products derived from the Apple
Software without specific prior written permission from Apple. Except
as expressly stated in this notice, no other rights or licenses, express
or implied, are granted by Apple herein, including but not limited to
any patent rights that may be infringed by your derivative works or by
other works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Copyright (C) 2009 Apple Inc. All Rights Reserved.
$Id: CDOpenALSupport.h 16 2010-03-11 06:22:10Z steveoldmeadow $
*/
#include <UIKit/UIKit.h>
#include "CDOpenALSupport.h"
#include <AudioToolbox/AudioToolbox.h>
#include <AudioToolbox/ExtendedAudioFile.h>
//Taken from oalTouch MyOpenALSupport 1.1
void* CDloadWaveAudioData(CFURLRef inFileURL, ALsizei *outDataSize, ALenum *outDataFormat, ALsizei* outSampleRate)
{
OSStatus err = noErr;
UInt64 fileDataSize = 0;
AudioStreamBasicDescription theFileFormat;
UInt32 thePropertySize = sizeof(theFileFormat);
AudioFileID afid = 0;
void* theData = NULL;
// Open a file with ExtAudioFileOpen()
err = AudioFileOpenURL(inFileURL, kAudioFileReadPermission, 0, &afid);
if(err) { NSLog(@"MyGetOpenALAudioData: AudioFileOpenURL FAILED, Error = %ld\n", err); goto Exit; }
// Get the audio data format
err = AudioFileGetProperty(afid, kAudioFilePropertyDataFormat, &thePropertySize, &theFileFormat);
if(err) { NSLog(@"MyGetOpenALAudioData: AudioFileGetProperty(kAudioFileProperty_DataFormat) FAILED, Error = %ld\n", err); goto Exit; }
if (theFileFormat.mChannelsPerFrame > 2) {
NSLog(@"MyGetOpenALAudioData - Unsupported Format, channel count is greater than stereo\n"); goto Exit;
}
if ((theFileFormat.mFormatID != kAudioFormatLinearPCM) || (!TestAudioFormatNativeEndian(theFileFormat))) {
NSLog(@"MyGetOpenALAudioData - Unsupported Format, must be little-endian PCM\n"); goto Exit;
}
if ((theFileFormat.mBitsPerChannel != 8) && (theFileFormat.mBitsPerChannel != 16)) {
NSLog(@"MyGetOpenALAudioData - Unsupported Format, must be 8 or 16 bit PCM\n"); goto Exit;
}
thePropertySize = sizeof(fileDataSize);
err = AudioFileGetProperty(afid, kAudioFilePropertyAudioDataByteCount, &thePropertySize, &fileDataSize);
if(err) { NSLog(@"MyGetOpenALAudioData: AudioFileGetProperty(kAudioFilePropertyAudioDataByteCount) FAILED, Error = %ld\n", err); goto Exit; }
// Read all the data into memory
UInt32 dataSize = (UInt32)fileDataSize;
theData = malloc(dataSize);
if (theData)
{
memset(theData, 0, dataSize);
AudioFileReadBytes(afid, false, 0, &dataSize, theData);
if(err == noErr)
{
// success
*outDataSize = (ALsizei)dataSize;
//This fix was added by me, however, 8 bit sounds have a clipping sound at the end so aren't really usable (SO)
if (theFileFormat.mBitsPerChannel == 16) {
*outDataFormat = (theFileFormat.mChannelsPerFrame > 1) ? AL_FORMAT_STEREO16 : AL_FORMAT_MONO16;
} else {
*outDataFormat = (theFileFormat.mChannelsPerFrame > 1) ? AL_FORMAT_STEREO8 : AL_FORMAT_MONO8;
}
*outSampleRate = (ALsizei)theFileFormat.mSampleRate;
}
else
{
// failure
free (theData);
theData = NULL; // make sure to return NULL
NSLog(@"MyGetOpenALAudioData: ExtAudioFileRead FAILED, Error = %ld\n", err); goto Exit;
}
}
Exit:
// Dispose the ExtAudioFileRef, it is no longer needed
if (afid) AudioFileClose(afid);
return theData;
}
//Taken from oalTouch MyOpenALSupport 1.4
void* CDloadCafAudioData(CFURLRef inFileURL, ALsizei *outDataSize, ALenum *outDataFormat, ALsizei* outSampleRate)
{
OSStatus status = noErr;
BOOL abort = NO;
SInt64 theFileLengthInFrames = 0;
AudioStreamBasicDescription theFileFormat;
UInt32 thePropertySize = sizeof(theFileFormat);
ExtAudioFileRef extRef = NULL;
void* theData = NULL;
AudioStreamBasicDescription theOutputFormat;
UInt32 dataSize = 0;
// Open a file with ExtAudioFileOpen()
status = ExtAudioFileOpenURL(inFileURL, &extRef);
if (status != noErr)
{
NSLog(@"MyGetOpenALAudioData: ExtAudioFileOpenURL FAILED, Error = %ld\n", status);
abort = YES;
}
if (abort)
goto Exit;
// Get the audio data format
status = ExtAudioFileGetProperty(extRef, kExtAudioFileProperty_FileDataFormat, &thePropertySize, &theFileFormat);
if (status != noErr)
{
NSLog(@"MyGetOpenALAudioData: ExtAudioFileGetProperty(kExtAudioFileProperty_FileDataFormat) FAILED, Error = %ld\n", status);
abort = YES;
}
if (abort)
goto Exit;
if (theFileFormat.mChannelsPerFrame > 2)
{
NSLog(@"MyGetOpenALAudioData - Unsupported Format, channel count is greater than stereo\n");
abort = YES;
}
if (abort)
goto Exit;
// Set the client format to 16 bit signed integer (native-endian) data
// Maintain the channel count and sample rate of the original source format
theOutputFormat.mSampleRate = theFileFormat.mSampleRate;
theOutputFormat.mChannelsPerFrame = theFileFormat.mChannelsPerFrame;
theOutputFormat.mFormatID = kAudioFormatLinearPCM;
theOutputFormat.mBytesPerPacket = 2 * theOutputFormat.mChannelsPerFrame;
theOutputFormat.mFramesPerPacket = 1;
theOutputFormat.mBytesPerFrame = 2 * theOutputFormat.mChannelsPerFrame;
theOutputFormat.mBitsPerChannel = 16;
theOutputFormat.mFormatFlags = kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsPacked | kAudioFormatFlagIsSignedInteger;
// Set the desired client (output) data format
status = ExtAudioFileSetProperty(extRef, kExtAudioFileProperty_ClientDataFormat, sizeof(theOutputFormat), &theOutputFormat);
if (status != noErr)
{
NSLog(@"MyGetOpenALAudioData: ExtAudioFileSetProperty(kExtAudioFileProperty_ClientDataFormat) FAILED, Error = %ld\n", status);
abort = YES;
}
if (abort)
goto Exit;
// Get the total frame count
thePropertySize = sizeof(theFileLengthInFrames);
status = ExtAudioFileGetProperty(extRef, kExtAudioFileProperty_FileLengthFrames, &thePropertySize, &theFileLengthInFrames);
if (status != noErr)
{
NSLog(@"MyGetOpenALAudioData: ExtAudioFileGetProperty(kExtAudioFileProperty_FileLengthFrames) FAILED, Error = %ld\n", status);
abort = YES;
}
if (abort)
goto Exit;
// Read all the data into memory
dataSize = (UInt32) theFileLengthInFrames * theOutputFormat.mBytesPerFrame;
theData = malloc(dataSize);
if (theData)
{
memset(theData, 0, dataSize);
AudioBufferList theDataBuffer;
theDataBuffer.mNumberBuffers = 1;
theDataBuffer.mBuffers[0].mDataByteSize = dataSize;
theDataBuffer.mBuffers[0].mNumberChannels = theOutputFormat.mChannelsPerFrame;
theDataBuffer.mBuffers[0].mData = theData;
// Read the data into an AudioBufferList
status = ExtAudioFileRead(extRef, (UInt32*)&theFileLengthInFrames, &theDataBuffer);
if(status == noErr)
{
// success
*outDataSize = (ALsizei)dataSize;
*outDataFormat = (theOutputFormat.mChannelsPerFrame > 1) ? AL_FORMAT_STEREO16 : AL_FORMAT_MONO16;
*outSampleRate = (ALsizei)theOutputFormat.mSampleRate;
}
else
{
// failure
free (theData);
theData = NULL; // make sure to return NULL
NSLog(@"MyGetOpenALAudioData: ExtAudioFileRead FAILED, Error = %ld\n", status);
abort = YES;
}
}
if (abort)
goto Exit;
Exit:
// Dispose the ExtAudioFileRef, it is no longer needed
if (extRef) ExtAudioFileDispose(extRef);
return theData;
}
void* CDGetOpenALAudioData(CFURLRef inFileURL, ALsizei *outDataSize, ALenum *outDataFormat, ALsizei* outSampleRate) {
CFStringRef extension = CFURLCopyPathExtension(inFileURL);
CFComparisonResult isWavFile = 0;
if (extension != NULL) {
isWavFile = CFStringCompare (extension,(CFStringRef)@"wav", kCFCompareCaseInsensitive);
CFRelease(extension);
}
if (isWavFile == kCFCompareEqualTo) {
return CDloadWaveAudioData(inFileURL, outDataSize, outDataFormat, outSampleRate);
} else {
return CDloadCafAudioData(inFileURL, outDataSize, outDataFormat, outSampleRate);
}
}

115
J/sound.h

@ -0,0 +1,115 @@
//
// Sound.h
// SoundDrop2
//
// Created by Joshua Moerman on 1/9/13.
// Copyright (c) 2013 Vadovas. All rights reserved.
//
#ifndef SoundDrop2_Sound_h
#define SoundDrop2_Sound_h
#include <iostream>
#include <OpenAL/al.h>
#include <OpenAL/alc.h>
#include "CDOpenALSupport.h"
namespace J {
struct AL {
ALCdevice * device{nullptr};
ALCcontext * context{nullptr};
AL(){
// Initializing sound:
// NULL for the default device
device = alcOpenDevice(NULL);
if (device) {
// NULL for no attributes
context = alcCreateContext(device, NULL);
alcMakeContextCurrent(context);
}
}
~AL(){
alcMakeContextCurrent(NULL);
alcDestroyContext(context);
alcCloseDevice(device);
}
};
struct Buffer {
ALuint buffer;
Buffer(Buffer const &) = delete;
Buffer & operator=(Buffer const &) = delete;
Buffer(Buffer && b){
std::swap(buffer, b.buffer);
}
Buffer & operator=(Buffer && b){
std::swap(buffer, b.buffer);
return *this;
}
Buffer(){
alGenBuffers(1, &buffer);
}
~Buffer(){
alDeleteBuffers(1, &buffer);
}
};
inline Buffer load_wav(std::string filename){
Buffer b;
void *data;
ALenum format;
ALsizei sizeInBytes;
ALsizei frequencyInHertz;
data = CDGetOpenALAudioData((CFURLRef)[NSURL fileURLWithPath: [NSString stringWithUTF8String: filename.c_str()]], &sizeInBytes, &format, &frequencyInHertz);
alBufferData(b.buffer, format, data, sizeInBytes, frequencyInHertz);
free(data);
return b;
}
struct Source {
ALuint source;
Source(Source const &) = delete;
Source & operator=(Source const &) = delete;
Source(Buffer const & buffer){
int r = rand() % 10;
float pitch = 0.5 + r*0.5;
alGenSources(1, &source);
alSourcei(source, AL_BUFFER, buffer.buffer);
alSourcef(source, AL_PITCH, pitch); //?
}
void play(){
// will restart if already playing
alSourcePlay(source);
}
~Source(){
// TODO: find out if this is needed
// NOTE: Buffers which are attached to a source can not be deleted
alSourcei(source, AL_BUFFER, 0);
// this will stop the playing
alDeleteSources(1, &source);
}
};
} // namespace J
#endif