libsent/src/adin/adin_mic_sp.c File Reference

Microphone input using spAudio library. More...

#include <sp/spAudioLib.h>
#include <sent/stddefs.h>
#include <sent/adin.h>

Go to the source code of this file.

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 spAudio	audio = NULL
	Audio descriptor.
static long	buffer_length = 256
	Buffer length.
static float	rate
	Sampling rate specified in adin_mic_standby().

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Detailed Description

Microphone input using spAudio library.

Low level I/O functions for microphone input using spAudio library. To use, please specify "--with-mictype=sp" options to configure script.

Julius does not alter any mixer device setting at all on Linux. You should configure the mixer for recording source (mic/line) and recording volume correctly using other audio tool such as xmixer.

This code has been contributed by Hideaki Banno.

See also:

http://www.sp.m.is.nagoya-u.ac.jp/people/banno/spLibs/index.html

Author:

Akinobu LEE

Date:

Sun Feb 13 19:16:43 2005

Revision

1.1.1.1

Definition in file adin_mic_sp.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 63 of file adin_mic_sp.c.

boolean adin_mic_begin

(

)

Start recording.

Returns:

TRUE on success, FALSE on failure.

Definition at line 77 of file adin_mic_sp.c.

boolean adin_mic_end

(

)

Stop recording.

Returns:

TRUE on success, FALSE on failure.

Definition at line 103 of file adin_mic_sp.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 some samples are 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 122 of file adin_mic_sp.c.

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