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Re: Help with AudioFileGetProperty
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Re: Help with AudioFileGetProperty


  • Subject: Re: Help with AudioFileGetProperty
  • From: Gilbert Mackall <email@hidden>
  • Date: Wed, 26 Feb 2003 15:24:03 -0500

Tommy,

Thanks for the help. After a few changes here are the results of opening an AIFF formated file created with QuickTime and the code used to get them.


PATH = /Users/gilbertmackall/Desktop/VAM_greeting.aif
SampleRate 44100.000000
FormatID 1819304813
FormatFlags 14
BytesPerPacket 2
FramesPerPacket 1
BytesPerFrame 2
ChannelsPerFrame 1



- (IBAction)getFile:(id)sender
{

int result;
NSString *path;
FSRef fileRef;
AudioFileID fileID;
UInt32 theSize;
UInt32 isWritable;
OSStatus osStatus = noErr;

AudioStreamBasicDescription basicDescription;

NSArray *fileTypes = [NSArray arrayWithObjects:@"AIFF",@"aif",@"AIFC",@"WAVE",@"wav",nil];

NSOpenPanel *oPanel = [NSOpenPanel openPanel];

[oPanel setAllowsMultipleSelection:NO];
result = [oPanel runModalForTypes:fileTypes];

if (result == NSOKButton)
{
NSArray *filesToOpen = [oPanel filenames];
path = [filesToOpen objectAtIndex:0];

printf("%s \n",[path cString]);

FSPathMakeRef([path fileSystemRepresentation],&fileRef,NULL);

AudioFileOpen(&fileRef, fsRdPerm, 0, &fileID);
osStatus = AudioFileGetPropertyInfo(fileID, kAudioFilePropertyDataFormat, &theSize, & isWritable);
if( osStatus == noErr )
{
// basicDescription = (AudioStreamBasicDescription * )malloc(sizeof(AudioStreamBasicDescription));
osStatus = AudioFileGetProperty(fileID,kAudioFilePropertyDataFormat,&theSize,&basic Description);
if( osStatus == noErr )
{
printf("SampleRate %f\n",basicDescription.mSampleRate);
printf("FormatID %ld\n",basicDescription.mFormatID);
printf("FormatFlags %ld\n",basicDescription.mFormatFlags);
printf("BytesPerPacket %ld\n",basicDescription.mBytesPerPacket);
printf("FramesPerPacket %ld\n",basicDescription.mFramesPerPacket);
printf("BytesPerFrame %ld\n",basicDescription.mBytesPerFrame);
printf("ChannelsPerFrame %ld\n",basicDescription.mChannelsPerFrame);
}
}
}
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References: 
 >Re: Help with AudioFileGetProperty (From: Tommy Braas <email@hidden>)

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