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>

Include dependency graph for adin_mic_darwin_coreaudio.c:

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
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)
bool	adin_mic_standby (int sfreq, void *dummy)
bool	adin_mic_start ()
bool	adin_mic_stop ()
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

Author:

Masatomo Hashimoto

Date:

Wed Oct 12 11:31:27 2005

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.

Revision

1.1.1.1

Definition in file adin_mic_darwin_coreaudio.c.

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Function Documentation

bool 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 281 of file adin_mic_darwin_coreaudio.c.

bool adin_mic_start (   )

Start recording. Returns: TRUE on success, FALSE on failure. Definition at line 565 of file adin_mic_darwin_coreaudio.c.

bool adin_mic_stop (   )

Stop recording. Returns: TRUE on success, FALSE on failure. Definition at line 566 of file adin_mic_darwin_coreaudio.c.

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