libs/CocosDenshion/CDOpenALSupport.m


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.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */#ifndef GAME_DATA_H_9C42AC51
#define GAME_DATA_H_9C42AC51

#include <map>
#include <optional>
#include <string>
#include <vector>

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 $Id: CDOpenALSupport.h 16 2010-03-11 06:22:10Z steveoldmeadow $
 */

#import "CDOpenALSupport.h"
#import "CocosDenshion.h"
#import <AudioToolbox/AudioToolbox.h>
#import <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) { CDLOG(@"MyGetOpenALAudioData: AudioFileOpenURL FAILED, Error = %ld\n", err); goto Exit; }
	
	// Get the audio data format
	err = AudioFileGetProperty(afid, kAudioFilePropertyDataFormat, &thePropertySize, &theFileFormat);
	if(err) { CDLOG(@"MyGetOpenALAudioData: AudioFileGetProperty(kAudioFileProperty_DataFormat) FAILED, Error = %ld\n", err); goto Exit; }
	
	if (theFileFormat.mChannelsPerFrame > 2)  { 
		CDLOG(@"MyGetOpenALAudioData - Unsupported Format, channel count is greater than stereo\n"); goto Exit;
	}
	
	if ((theFileFormat.mFormatID != kAudioFormatLinearPCM) || (!TestAudioFormatNativeEndian(theFileFormat))) { 
		CDLOG(@"MyGetOpenALAudioData - Unsupported Format, must be little-endian PCM\n"); goto Exit;
	}
	
	if ((theFileFormat.mBitsPerChannel != 8) && (theFileFormat.mBitsPerChannel != 16)) { 
		CDLOG(@"MyGetOpenALAudioData - Unsupported Format, must be 8 or 16 bit PCM\n"); goto Exit;
	}
	
	
	thePropertySize = sizeof(fileDataSize);
	err = AudioFileGetProperty(afid, kAudioFilePropertyAudioDataByteCount, &thePropertySize, &fileDataSize);
	if(err) { CDLOG(@"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)
	{
		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
			CDLOG(@"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)
	{
		CDLOG(@"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)
	{
		CDLOG(@"MyGetOpenALAudioData: ExtAudioFileGetProperty(kExtAudioFileProperty_FileDataFormat) FAILED, Error = %ld\n", status);
		abort = YES;
	}
	if (abort)
		goto Exit;
	
	if (theFileFormat.mChannelsPerFrame > 2)
	{
		CDLOG(@"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)
	{
		CDLOG(@"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)
	{
		CDLOG(@"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)
	{
		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
			CDLOG(@"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);		
	}
}