wavplayer.c File Reference

Plays 16-bit, 32ksps, mono .wav files in the root directory of a microSD card. More...

#include "simpletools.h"
#include "wavplayer.h"

Functions
void	play (void)
void	wav_reader (void *par)
void	audio_dac (void *par)
void	spooler (void *par)
void	wav_play (const char *wavFilename)
	Play a .wav file.
int	wav_playing ()
	Check if wav file is currently playing.
void	wav_volume (int vol)
	Set wav play volume 0 to 10. 0 is lowest, 10 is highest.
void	wav_stop (void)
	Stop wav file reading but leave audio output open so that you can play another track without a click at the start. Recommended over wav_close unless your application needs to recover both the wav reading and audio output cogs for other uses.
void	wav_close (void)
	Stop wav file reading and close audio output. Only recommended if your application needs to recover two cogs for other purposes. Otherwise, use wave_stop. It will stop the cog that reads the wav file, but leave the audio output cog open, which will prevent a click at the start of the next track your application plays.

Variables
char	wavDacBufferL [512]
char	wavDacBufferH [512]
volatile const char *	track
FILE *	fp

Detailed Description

Plays 16-bit, 32ksps, mono .wav files in the root directory of a microSD card.

Author

Andy Lindsay

Copyright

Copyright (C) Parallax, Inc. 2012. All Rights MIT Licensed.

Currently supports LMM and CMM memory models.

WAV file info sources, thanks to:
http://blogs.msdn.com/b/dawate/archive/2009/06/23/intro-to-audio-programming-part-2-demystifying-the-wav-format.aspx
http://www.sonicspot.com/guide/wavefiles.html

Function Documentation

void wav_play

(

const char *

wavFilename

)

Play a .wav file.

Parameters

wavFilename

Pointer to character array with filename.

int wav_playing

(

)

Check if wav file is currently playing.

Returns

1 if playing, 0 if not.

void wav_volume

(

int

vol

)

Set wav play volume 0 to 10. 0 is lowest, 10 is highest.

Parameters

vol	wav playback volume.