libsent/src/adin/adin_mic_o2.c File Reference

Microphone input on SGI IRIX machine. More...

#include <sent/stddefs.h>
#include <sent/adin.h>
#include <audio.h>

Go to the source code of this file.

Functions
static boolean	adin_o2_setup_global (double rate)
	Initialize global audio interface to use microphone input.
boolean	adin_mic_standby (int sfreq, void *dummy)
	Device initialization: check device capability and open for recording.
boolean	adin_mic_begin ()
	Start recording.
boolean	adin_mic_end ()
	Stop recording.
int	adin_mic_read (SP16 *buf, int sampnum)
	Read samples from device.
Variables
static ALconfig	ac
	Local port settings.
static ALport	aport
	Audio port.

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Detailed Description

Microphone input on SGI IRIX machine.

Low level I/O functions for microphone input on a SGI IRIX machine. This file is used as default on IRIX machines.

Tested on IRIX 6.3, SGI O2 Workstation.

The microphone input device will be automatically selected by Julius on startup. Please note that the recoding volue will not be altered by Julius, and appropriate value should be set by another tool such as apanel.

Author:

Akinobu LEE

Date:

Sun Feb 13 18:42:22 2005

Revision

1.1.1.1

Definition in file adin_mic_o2.c.

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Function Documentation

static boolean adin_o2_setup_global

(

double

rate

)

[static]

Initialize global audio interface to use microphone input.

Parameters:

rate

[in] sampling rate in Hz

Returns:

TRUE on success, FALSE on failure.

Definition at line 58 of file adin_mic_o2.c.

Referenced by adin_mic_standby().

boolean adin_mic_standby	(	int	sfreq,
		void *	dummy
	)

Device initialization: check device capability and open for recording.

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 86 of file adin_mic_o2.c.

boolean adin_mic_begin

(

)

Start recording.

Returns:

TRUE on success, FALSE on failure.

Definition at line 120 of file adin_mic_o2.c.

boolean adin_mic_end

(

)

Stop recording.

Returns:

TRUE on success, FALSE on failure.

Definition at line 138 of file adin_mic_o2.c.

int adin_mic_read	(	SP16 *	buf,
		int	sampnum
	)

Read samples from device.

Read samples from the daemon.

Try to read sampnum samples and returns actual number of recorded samples currently available. This function will block until at least one sample can be obtained.

Parameters:

	buf	[out] samples obtained in this function
	sampnum	[in] wanted number of samples to be read

Returns:

actural number of read samples, -2 if an error occured.

Definition at line 158 of file adin_mic_o2.c.

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