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

1.2

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.

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.

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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