audio.hcc File Reference

#include <stdlib.hch>
#include "pal_master.hch"
#include "configuration.hch"
#include "audio.hch"

Include dependency graph for audio.hcc:

Go to the source code of this file.

Functions
macro proc	audio_init (gain_level, input_source, sample_rate, AUDIOIN, AUDIOOUT)
	Set some inital values to the audio hardware.
macro proc	audio_main (audiodata, AUDIOIN, AUDIOOUT)
	Main audiodriver. This function never returns! It calls the audiohandlers and stores samples into a global array. Once 64 Samples are collected it raises a signal AUDIO_READY to let other processes know it's ready. We use quadruple buffering for audio input and double buffering for audio output.

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Detailed Description

Graphic Equalizer API

Project information.

Project Graphic Equalizer

Author:

O.M. Schinagl

Date:

20041011

Version:

0.1

Copyright

Copyright ©2004 Koninklijke Philips Electronics N.V. All rights reserved

Change history

20041011:
Initial version

Definition in file audio.hcc.

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Function Documentation

macro proc audio_init (  gain_level  , input_source  , sample_rate  , AUDIOIN  , AUDIOOUT  )

Set some inital values to the audio hardware. Parameters: gain_level  Set the input amplifier to this amplification level. input_source  Choose between microphone input or linein input. sample_rate  Set the sample rate between 8000 and 48000 Returns: void Return values: void  Definition at line 45 of file audio.hcc. Referenced by main().

macro proc audio_main (  audiodata  , AUDIOIN  , AUDIOOUT  )

Main audiodriver. This function never returns! It calls the audiohandlers and stores samples into a global array. Once 64 Samples are collected it raises a signal AUDIO_READY to let other processes know it's ready. We use quadruple buffering for audio input and double buffering for audio output. Parameters: *audiodata  pointer to audio information structure. AUDIOIN  Audio Input Handler AUDIOOUT  Audio Output Handler Returns: Never Returns. Return values: void  Definition at line 76 of file audio.hcc. Referenced by main().

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