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>

Include dependency graph for adin_mic_sp.c:

Go to the source code of this file.

Functions
boolean	adin_mic_standby (int sfreq, void *dummy)
boolean	adin_mic_start ()
boolean	adin_mic_stop ()
int	adin_mic_read (SP16 *buf, int sampnum)
	Read samples from the daemon.
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.

Author:

Akinobu LEE

Date:

Sun Feb 13 19:16:43 2005

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

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.

Parameters:

	sfreq	[in] required sampling frequency.
	dummy	[in] a dummy data

Returns:

TRUE on success, FALSE on failure.

Definition at line 62 of file adin_mic_sp.c.

boolean adin_mic_start

(

)

Start recording.

Returns:

TRUE on success, FALSE on failure.

Definition at line 76 of file adin_mic_sp.c.

boolean adin_mic_stop

(

)

Stop recording.

Returns:

TRUE on success, FALSE on failure.

Definition at line 102 of file adin_mic_sp.c.

int adin_mic_read	(	SP16 *	buf,
		int	sampnum
	)

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 121 of file adin_mic_sp.c.

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