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Re: AudioFile.h
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Re: AudioFile.h

On Wednesday, April 23, 2003, at 03:19 PM, matt ingalls wrote:

this is what i am seeing.

BUT
i am STILL not able to get aiff and wav files to work:

AudioFileOpen returns no error

but then AudioFileGetProperty() calls for
kAudioFilePropertyDataFormat,
kAudioFilePropertyAudioDataByteCount,
and kAudioFilePropertyAudioDataPacketCount
all set the propertyData to zero.

Sd2 files work fine. Any idea why this may be happening?
[i am running 10.2.5 with a macho carbon codewarrior 8.3 proj]


Try this program. Works on my 10.2.5 system. I used project builder.

//---

#include <AudioToolbox/AudioToolbox.h>


bool FSRefFromPath(FSRef* outFSRef, CFStringRef inAbsolutePath)
{
CFURLRef url = CFURLCreateWithString(0, inAbsolutePath, 0);
bool result = CFURLGetFSRef(url, outFSRef);
CFRelease(url);
return result;
}

int main (int argc, const char * argv[])
{
FSRef fsRef;
if (!FSRefFromPath(&fsRef, CFSTR("/System/Library/Sounds/Submarine.aiff")))
return 1;

AudioFileID afid;
OSStatus err = AudioFileOpen(&fsRef, fsRdPerm, 0, &afid);
printf("err %lu %4.4s\n", err, (char*)&err);
if (err) return 2;


AudioStreamBasicDescription srcFmt;
UInt32 propertySize = sizeof(srcFmt);
err = AudioFileGetProperty(afid, kAudioFilePropertyDataFormat, &propertySize, &srcFmt);
printf("kAudioFilePropertyDataFormat err %lu %4.4s\n", err, (char*)&err);
if (err) return 3;
printf("mFormatID %4.4s\n", (char*)&srcFmt.mFormatID);
printf("mFormatFlags 0xlX\n", srcFmt.mFormatFlags);
printf("mSampleRate %g\n", srcFmt.mSampleRate);
printf("mBitsPerChannel %lu\n", srcFmt.mBitsPerChannel);
printf("mChannelsPerFrame %lu\n", srcFmt.mChannelsPerFrame);
printf("mBytesPerPacket %lu\n", srcFmt.mBytesPerPacket);
printf("mFramesPerPacket %lu\n", srcFmt.mFramesPerPacket);
printf("mBytesPerFrame %lu\n", srcFmt.mBytesPerFrame);


UInt64 numBytes;
propertySize = sizeof(numBytes);
err = AudioFileGetProperty(afid, kAudioFilePropertyAudioDataByteCount, &propertySize, &numBytes);
printf("kAudioFilePropertyAudioDataByteCount err %lu %4.4s\n", err, (char*)&err);
if (err) return 4;
printf("numBytes %llu\n", numBytes);

UInt64 numPackets;
propertySize = sizeof(numPackets);
err = AudioFileGetProperty(afid, kAudioFilePropertyAudioDataPacketCount, &propertySize, &numPackets);
printf("kAudioFilePropertyAudioDataPacketCount err %lu %4.4s\n", err, (char*)&err);
if (err) return 5;
printf("numPackets %llu\n", numPackets);

err = AudioFileClose(afid);
printf("err %lu %4.4s\n", err, (char*)&err);
if (err) return 6;

return 0;
}


//---

---
James McCartney email@hidden
Apple CoreAudio
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References: 
 >Re: AudioFile.h (From: matt ingalls <email@hidden>)



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