libsent/src/adin/adin_mic_darwin_coreaudio.c File Reference

adin microphone library for CoreAudio API More...

#include <CoreAudio/CoreAudio.h>
#include <AudioUnit/AudioUnit.h>
#include <AudioUnit/AudioOutputUnit.h>
#include <AudioToolbox/AudioConverter.h>
#include <pthread.h>
#include <stdio.h>

Go to the source code of this file.

Defines
#define	DEVICE_NAME_LEN   128
#define	BUF_SAMPLES   4096
#define	BITS_PER_BYTE   8
Typedefs
typedef SInt16	Sample
typedef unsigned char	boolean
Functions
static void	printStreamInfo (AudioStreamBasicDescription *desc)
static void	printAudioBuffer (AudioBuffer *buf)
static AudioBufferList *	allocateAudioBufferList (UInt32 data_bytes, UInt32 nsamples, UInt32 nchan)
static OSStatus	ConvInputProc (AudioConverterRef inConv, UInt32 *ioNumDataPackets, AudioBufferList *ioData, AudioStreamPacketDescription **outDataPacketDesc, void *inUserData)
static OSStatus	InputProc (void *inRefCon, AudioUnitRenderActionFlags *ioActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, UInt32 inNumberFrames, AudioBufferList *ioData)
boolean	adin_mic_standby (int sfreq, void *dummy)
	Connection initialization: check connectivity and open for recording.
boolean	adin_mic_begin ()
	Start recording.
boolean	adin_mic_end ()
	Stop recording.
int	adin_mic_read (void *buffer, int nsamples)
void	adin_mic_pause ()
Variables
static UInt32	ConvQuality = kAudioConverterQuality_Medium
static UInt32	BytesPerSample = sizeof(Sample)
static AudioDeviceID	InputDeviceID
static AudioUnit	InputUnit
static AudioConverterRef	Converter
static pthread_mutex_t	MutexInput
static pthread_cond_t	CondInput
static bool	CoreAudioRecordStarted = FALSE
static bool	CoreAudioHasInputDevice = FALSE
static bool	CoreAudioInit = FALSE
static UInt32	NumSamplesAvailable = 0
static UInt32	InputDeviceBufferSamples = 0
static UInt32	InputBytesPerPacket = 0
static UInt32	InputFramesPerPacket = 0
static UInt32	InputSamplesPerPacket = 0
static UInt32	OutputBitsPerChannel = 0
static UInt32	OutputBytesPerPacket = 0
static UInt32	OutputSamplesPerPacket = 0
static AudioBufferList *	BufList
static AudioBufferList	BufListBackup
static AudioBufferList *	BufListConverted

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Detailed Description

adin microphone library for CoreAudio API

by Masatomo Hashimoto <m.hashimoto@aist.go.jp>

Tested on Mac OS X v10.3.9 and v10.4.1

This file has been contributed from the Ubiquitous Software Group, Information Technology Research Institute, AIST.

Author:

Masatomo Hashimoto

Date:

Wed Oct 12 11:31:27 2005

Revision

1.1.1.1

Definition in file adin_mic_darwin_coreaudio.c.

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Function Documentation

boolean adin_mic_standby	(	int	sfreq,
		void *	dummy
	)

Connection initialization: check connectivity and open for recording.

Parameters:

	sfreq	[in] required sampling frequency
	dummy	[in] a dummy data

Returns:

TRUE on success, FALSE on failure.

Definition at line 285 of file adin_mic_darwin_coreaudio.c.

boolean adin_mic_begin

(

)

Start recording.

Returns:

TRUE on success, FALSE on failure.

Definition at line 571 of file adin_mic_darwin_coreaudio.c.

boolean adin_mic_end

(

)

Stop recording.

Returns:

TRUE on success, FALSE on failure.

Definition at line 572 of file adin_mic_darwin_coreaudio.c.

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