SpeakHere example produces different number of samples
SpeakHere example produces different number of samples
- Subject: SpeakHere example produces different number of samples
- From: On Lee <email@hidden>
- Date: Fri, 11 Jun 2010 00:52:48 +0000
- Importance: Normal
I am looking at the SpeakHere example and added the following:
// Overriding the output audio route
UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;
AudioSessionSetProperty(kAudioSessionProperty_OverrideAudioRoute, sizeof (audioRouteOverride), &audioRouteOverride);
assert(status == noErr);
// Changing the default output route. The new output route remains in effect unless you change the audio session category. This option is available starting in iPhone OS 3.1.
UInt32 doChangeDefaultRoute = 1;
status = AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryDefaultToSpeaker, sizeof(doChangeDefaultRoute), &doChangeDefaultRoute);
assert(status == noErr);
// Enable Bluetooth. See audioRouteOverride & doChangeDefaultRoute above
// http://developer.apple.com/iphone/library/documentation/Audio/Conceptual/AudioSessionProgrammingGuide/Cookbook/Cookbook.html#//apple_ref/doc/uid/TP40007875-CH6-SW2
UInt32 allowBluetoothInput = 1;
status = AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryEnableBluetoothInput, sizeof(allowBluetoothInput), &allowBluetoothInput);
assert(status == noErr);
Also,
void AQRecorder::handleInputBufferCallback(void *aqData, ...
...
if (inNumPackets > 0) {
NSLog(@"Number of samples = %d", inBuffer->mAudioDataByteSize/2); // print out the number of sample
status = AudioFileWritePackets(aqr->mAudioFile,
FALSE,
inBuffer->mAudioDataByteSize,
inPacketDesc,
aqr->mCurrentPacket,
&inNumPackets,
inBuffer->mAudioData);
assert(status == noErr);
aqr->mCurrentPacket += inNumPackets;
}
...
Notice the "NSLog(@"Number of samples = %d", inBuffer->mAudioDataByteSize/2); //
print out the number of sample" statement above.
I am using iPhone SDK 3.1.3.
I got the following results
- The number of samples is around 44,100 on Simulator
- The number of samples is around 22,000 on iPhone
- The number of samples is around 4,000 on iPhone using Jawbone Bluetooth
I am new on this. Why do they produce different number of samples?
Thanks in advance for your help.
Best, -- On Lee
The New Busy think 9 to 5 is a cute idea. Combine multiple calendars with Hotmail. Get busy.
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