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Darcy Liu
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add oalTouch
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‎README.md‎

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@@ -1212,4 +1212,12 @@ Demonstrates how to implement and customize the 2 UIView properties of UITableVi
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[URL](https://developer.apple.com/library/ios/#samplecode/HeaderFooter/Introduction/Intro.html#//apple_ref/doc/uid/DTS40007989)
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Last Revision: Version 1.3, 2010-06-29
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Last Revision: Version 1.3, 2010-06-29
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#oalTouch#
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The code uses OpenAL to play a single audio source. Move source or listener position by dragging icons around on the grid. Turn accelerometer functionality on to set listener orientation by tilting the device.
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[URL](https://developer.apple.com/library/ios/#samplecode/oalTouch/Introduction/Intro.html#//apple_ref/doc/uid/DTS40007769)
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Last Revision: Version 1.9, 2010-06-29

‎oalTouch.zip‎

1.51 MB
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‎oalTouch/Classes/MyOpenALSupport.c‎

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/*
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File: MyOpenALSupport.c
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Abstract: OpenAL-related support functions
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Version: 1.9
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Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
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Inc. ("Apple") in consideration of your agreement to the following
9+
terms, and your use, installation, modification or redistribution of
10+
this Apple software constitutes acceptance of these terms. If you do
11+
not agree with these terms, please do not use, install, modify or
12+
redistribute this Apple software.
13+
14+
In consideration of your agreement to abide by the following terms, and
15+
subject to these terms, Apple grants you a personal, non-exclusive
16+
license, under Apple's copyrights in this original Apple software (the
17+
"Apple Software"), to use, reproduce, modify and redistribute the Apple
18+
Software, with or without modifications, in source and/or binary forms;
19+
provided that if you redistribute the Apple Software in its entirety and
20+
without modifications, you must retain this notice and the following
21+
text and disclaimers in all such redistributions of the Apple Software.
22+
Neither the name, trademarks, service marks or logos of Apple Inc. may
23+
be used to endorse or promote products derived from the Apple Software
24+
without specific prior written permission from Apple. Except as
25+
expressly stated in this notice, no other rights or licenses, express or
26+
implied, are granted by Apple herein, including but not limited to any
27+
patent rights that may be infringed by your derivative works or by other
28+
works in which the Apple Software may be incorporated.
29+
30+
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
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MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
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THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
33+
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
34+
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
35+
36+
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
37+
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
38+
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
39+
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
40+
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
41+
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
42+
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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Copyright (C) 2010 Apple Inc. All Rights Reserved.
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*/
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#include "MyOpenALSupport.h"
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ALvoid alBufferDataStaticProc(const ALint bid, ALenum format, ALvoid* data, ALsizei size, ALsizei freq)
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{
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static alBufferDataStaticProcPtr proc = NULL;
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if (proc == NULL) {
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proc = (alBufferDataStaticProcPtr) alcGetProcAddress(NULL, (const ALCchar*) "alBufferDataStatic");
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}
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if (proc)
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proc(bid, format, data, size, freq);
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return;
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}
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void* MyGetOpenALAudioData(CFURLRef inFileURL, ALsizei *outDataSize, ALenum *outDataFormat, ALsizei* outSampleRate)
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{
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OSStatus err = noErr;
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SInt64 theFileLengthInFrames = 0;
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AudioStreamBasicDescription theFileFormat;
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UInt32 thePropertySize = sizeof(theFileFormat);
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ExtAudioFileRef extRef = NULL;
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void* theData = NULL;
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AudioStreamBasicDescription theOutputFormat;
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// Open a file with ExtAudioFileOpen()
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err = ExtAudioFileOpenURL(inFileURL, &extRef);
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if(err) { printf("MyGetOpenALAudioData: ExtAudioFileOpenURL FAILED, Error = %ld\n", err); goto Exit; }
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// Get the audio data format
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err = ExtAudioFileGetProperty(extRef, kExtAudioFileProperty_FileDataFormat, &thePropertySize, &theFileFormat);
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if(err) { printf("MyGetOpenALAudioData: ExtAudioFileGetProperty(kExtAudioFileProperty_FileDataFormat) FAILED, Error = %ld\n", err); goto Exit; }
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if (theFileFormat.mChannelsPerFrame > 2) { printf("MyGetOpenALAudioData - Unsupported Format, channel count is greater than stereo\n"); goto Exit;}
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// Set the client format to 16 bit signed integer (native-endian) data
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// Maintain the channel count and sample rate of the original source format
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theOutputFormat.mSampleRate = theFileFormat.mSampleRate;
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theOutputFormat.mChannelsPerFrame = theFileFormat.mChannelsPerFrame;
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theOutputFormat.mFormatID = kAudioFormatLinearPCM;
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theOutputFormat.mBytesPerPacket = 2 * theOutputFormat.mChannelsPerFrame;
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theOutputFormat.mFramesPerPacket = 1;
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theOutputFormat.mBytesPerFrame = 2 * theOutputFormat.mChannelsPerFrame;
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theOutputFormat.mBitsPerChannel = 16;
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theOutputFormat.mFormatFlags = kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsPacked | kAudioFormatFlagIsSignedInteger;
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// Set the desired client (output) data format
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err = ExtAudioFileSetProperty(extRef, kExtAudioFileProperty_ClientDataFormat, sizeof(theOutputFormat), &theOutputFormat);
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if(err) { printf("MyGetOpenALAudioData: ExtAudioFileSetProperty(kExtAudioFileProperty_ClientDataFormat) FAILED, Error = %ld\n", err); goto Exit; }
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// Get the total frame count
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thePropertySize = sizeof(theFileLengthInFrames);
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err = ExtAudioFileGetProperty(extRef, kExtAudioFileProperty_FileLengthFrames, &thePropertySize, &theFileLengthInFrames);
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if(err) { printf("MyGetOpenALAudioData: ExtAudioFileGetProperty(kExtAudioFileProperty_FileLengthFrames) FAILED, Error = %ld\n", err); goto Exit; }
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// Read all the data into memory
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UInt32 dataSize = theFileLengthInFrames * theOutputFormat.mBytesPerFrame;;
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theData = malloc(dataSize);
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if (theData)
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{
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AudioBufferList theDataBuffer;
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theDataBuffer.mNumberBuffers = 1;
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theDataBuffer.mBuffers[0].mDataByteSize = dataSize;
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theDataBuffer.mBuffers[0].mNumberChannels = theOutputFormat.mChannelsPerFrame;
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theDataBuffer.mBuffers[0].mData = theData;
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// Read the data into an AudioBufferList
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err = ExtAudioFileRead(extRef, (UInt32*)&theFileLengthInFrames, &theDataBuffer);
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if(err == noErr)
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{
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// success
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*outDataSize = (ALsizei)dataSize;
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*outDataFormat = (theOutputFormat.mChannelsPerFrame > 1) ? AL_FORMAT_STEREO16 : AL_FORMAT_MONO16;
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*outSampleRate = (ALsizei)theOutputFormat.mSampleRate;
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}
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else
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{
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// failure
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free (theData);
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theData = NULL; // make sure to return NULL
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printf("MyGetOpenALAudioData: ExtAudioFileRead FAILED, Error = %ld\n", err); goto Exit;
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}
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}
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Exit:
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// Dispose the ExtAudioFileRef, it is no longer needed
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if (extRef) ExtAudioFileDispose(extRef);
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return theData;
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}
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‎oalTouch/Classes/MyOpenALSupport.h‎

Lines changed: 60 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,60 @@
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/*
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File: MyOpenALSupport.h
4+
Abstract: OpenAL-related support functions
5+
Version: 1.9
6+
7+
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
8+
Inc. ("Apple") in consideration of your agreement to the following
9+
terms, and your use, installation, modification or redistribution of
10+
this Apple software constitutes acceptance of these terms. If you do
11+
not agree with these terms, please do not use, install, modify or
12+
redistribute this Apple software.
13+
14+
In consideration of your agreement to abide by the following terms, and
15+
subject to these terms, Apple grants you a personal, non-exclusive
16+
license, under Apple's copyrights in this original Apple software (the
17+
"Apple Software"), to use, reproduce, modify and redistribute the Apple
18+
Software, with or without modifications, in source and/or binary forms;
19+
provided that if you redistribute the Apple Software in its entirety and
20+
without modifications, you must retain this notice and the following
21+
text and disclaimers in all such redistributions of the Apple Software.
22+
Neither the name, trademarks, service marks or logos of Apple Inc. may
23+
be used to endorse or promote products derived from the Apple Software
24+
without specific prior written permission from Apple. Except as
25+
expressly stated in this notice, no other rights or licenses, express or
26+
implied, are granted by Apple herein, including but not limited to any
27+
patent rights that may be infringed by your derivative works or by other
28+
works in which the Apple Software may be incorporated.
29+
30+
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
31+
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
32+
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
33+
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
34+
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
35+
36+
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
37+
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
38+
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
39+
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
40+
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
41+
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
42+
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
43+
POSSIBILITY OF SUCH DAMAGE.
44+
45+
Copyright (C) 2010 Apple Inc. All Rights Reserved.
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47+
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*/
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#import <OpenAL/al.h>
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#import <OpenAL/alc.h>
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#import <AudioToolbox/AudioToolbox.h>
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#import <AudioToolbox/ExtendedAudioFile.h>
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typedef ALvoid AL_APIENTRY (*alBufferDataStaticProcPtr) (const ALint bid, ALenum format, ALvoid* data, ALsizei size, ALsizei freq);
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ALvoid alBufferDataStaticProc(const ALint bid, ALenum format, ALvoid* data, ALsizei size, ALsizei freq);
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void* MyGetOpenALAudioData(CFURLRef inFileURL, ALsizei *outDataSize, ALenum *outDataFormat, ALsizei* outSampleRate);
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‎oalTouch/Classes/oalPlayback.h‎

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/*
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File: oalPlayback.h
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Abstract: An Obj-C class which wraps an OpenAL playback environment
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Version: 1.9
6+
7+
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
8+
Inc. ("Apple") in consideration of your agreement to the following
9+
terms, and your use, installation, modification or redistribution of
10+
this Apple software constitutes acceptance of these terms. If you do
11+
not agree with these terms, please do not use, install, modify or
12+
redistribute this Apple software.
13+
14+
In consideration of your agreement to abide by the following terms, and
15+
subject to these terms, Apple grants you a personal, non-exclusive
16+
license, under Apple's copyrights in this original Apple software (the
17+
"Apple Software"), to use, reproduce, modify and redistribute the Apple
18+
Software, with or without modifications, in source and/or binary forms;
19+
provided that if you redistribute the Apple Software in its entirety and
20+
without modifications, you must retain this notice and the following
21+
text and disclaimers in all such redistributions of the Apple Software.
22+
Neither the name, trademarks, service marks or logos of Apple Inc. may
23+
be used to endorse or promote products derived from the Apple Software
24+
without specific prior written permission from Apple. Except as
25+
expressly stated in this notice, no other rights or licenses, express or
26+
implied, are granted by Apple herein, including but not limited to any
27+
patent rights that may be infringed by your derivative works or by other
28+
works in which the Apple Software may be incorporated.
29+
30+
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
31+
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
32+
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
33+
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
34+
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
35+
36+
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
37+
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
38+
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
39+
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
40+
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
41+
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
42+
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
43+
POSSIBILITY OF SUCH DAMAGE.
44+
45+
Copyright (C) 2010 Apple Inc. All Rights Reserved.
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47+
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*/
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#import <UIKit/UIKit.h>
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#import <AVFoundation/AVFoundation.h>
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#import <OpenAL/al.h>
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#import <OpenAL/alc.h>
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#define kDefaultDistance 25.0
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@interface oalPlayback : NSObject
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{
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IBOutlet UISwitch* musicSwitch;
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ALuint source;
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ALuint buffer;
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ALCcontext* context;
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ALCdevice* device;
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void* data;
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CGPoint sourcePos;
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CGPoint listenerPos;
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CGFloat listenerRotation;
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ALfloat sourceVolume;
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BOOL isPlaying;
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BOOL wasInterrupted;
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NSURL* bgURL;
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AVAudioPlayer* bgPlayer;
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UInt32 iPodIsPlaying;
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}
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@property (nonatomic, assign) BOOL isPlaying; // Whether the sound is playing or stopped
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@property (nonatomic, assign) UInt32 iPodIsPlaying; // Whether the iPod is playing
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@property (nonatomic, assign) BOOL wasInterrupted; // Whether playback was interrupted by the system
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@property (nonatomic, assign) CGPoint sourcePos; // The coordinates of the sound source
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@property (nonatomic, assign) CGPoint listenerPos; // The coordinates of the listener
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@property (nonatomic, assign) CGFloat listenerRotation; // The rotation angle of the listener in radians
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- (IBAction)toggleMusic:(UISwitch*)sender;
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- (void)checkForMusic;
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- (void)initOpenAL;
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- (void)teardownOpenAL;
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- (void)startSound;
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- (void)stopSound;
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@end

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