libsent/src/adin/adin_mic_sun4.c File Reference

Microphone input on Sun4. More...

#include <sent/stddefs.h>
#include <sent/adin.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <stropts.h>
#include <poll.h>
#include <multimedia/libaudio.h>
#include <multimedia/audio_device.h>

Go to the source code of this file.

Defines
#define	J_DEF_VOLUME   20
	Recording volume (range=0-99).
#define	DEFAULT_DEVICE   "/dev/audio"
	Default device name, can be overridden by AUDIODEV environment variable.
Functions
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 int	volume = J_DEF_VOLUME
	Default volume.
static int	afd
	Audio file descriptor.
static struct pollfd	pfd
	File descriptor for polling.
static audio_info_t	ainfo
	Audio info.

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Detailed Description

Microphone input on Sun4.

Low level I/O functions for microphone input on SunOS 4.x machines. This file is used as default on SunOS 4.x machines.

Tested on SunOS 4.1.3.

The microphone input device will be automatically selected by Julius on startup, and volume will be set to J_DEF_VOLUME.

The default device name is "/dev/audio", which can be changed by setting environment variable AUDIODEV.

Author:

Akinobu LEE

Date:

Sun Feb 13 18:56:13 2005

Revision

1.1.1.1

Definition in file adin_mic_sun4.c.

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Function Documentation

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 80 of file adin_mic_sun4.c.

boolean adin_mic_begin

(

)

Start recording.

Returns:

TRUE on success, FALSE on failure.

Definition at line 159 of file adin_mic_sun4.c.

boolean adin_mic_end

(

)

Stop recording.

Returns:

TRUE on success, FALSE on failure.

Definition at line 175 of file adin_mic_sun4.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 198 of file adin_mic_sun4.c.

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