Tom Coxon / Mbed 2 deprecated EA_WavPlayer

Demo of Embedded Artists LPCXpresso baseboard SD card reader and audio facilities. Updated to put wav file player in a separate library and use the high capacity SD card library provided by Klaus Bu.

Dependencies:   mbed

wavplayer.h@2:affcc36a50b4, 2010-07-25 (annotated)

Committer:
tom_coxon
Date:
Sun Jul 25 17:51:19 2010 +0000
Revision:
2:affcc36a50b4

        

        
Who changed what in which revision?

        

            
                
UserRevisionLine numberNew contents of line

            
            


tom_coxon

2:affcc36a50b4


     1

/*





tom_coxon

2:affcc36a50b4


     2

 Library wave file player by Tom Coxon





tom_coxon

2:affcc36a50b4


     3







tom_coxon

2:affcc36a50b4


     4

 Based on WAVEplayer by Vlad Cazan/Stephan Rochon modified by Tom Coxon to:





tom_coxon

2:affcc36a50b4


     5







tom_coxon

2:affcc36a50b4


     6

 1. Run correctly on the Embedded Artists LPCXpresso baseboard.





tom_coxon

2:affcc36a50b4


     7

 2. To play 8 bit sample size in addition to original 16 bit





tom_coxon

2:affcc36a50b4


     8

 3. To be more fault tolerant when playing wav files.





tom_coxon

2:affcc36a50b4


     9

*/





tom_coxon

2:affcc36a50b4


    10







tom_coxon

2:affcc36a50b4


    11

#ifndef WAVPLAYER_H





tom_coxon

2:affcc36a50b4


    12

#define WAVPLAYER_H





tom_coxon

2:affcc36a50b4


    13







tom_coxon

2:affcc36a50b4


    14

#include "mbed.h"





tom_coxon

2:affcc36a50b4


    15







tom_coxon

2:affcc36a50b4


    16

#define SAMPLE_FREQ 40000





tom_coxon

2:affcc36a50b4


    17

#define BUF_SIZE (SAMPLE_FREQ/10)





tom_coxon

2:affcc36a50b4


    18

#define SLICE_BUF_SIZE 1





tom_coxon

2:affcc36a50b4


    19







tom_coxon

2:affcc36a50b4


    20

typedef struct uFMT_STRUCT {





tom_coxon

2:affcc36a50b4


    21

    short comp_code;





tom_coxon

2:affcc36a50b4


    22

    short num_channels;





tom_coxon

2:affcc36a50b4


    23

    unsigned sample_rate;





tom_coxon

2:affcc36a50b4


    24

    unsigned avg_Bps;





tom_coxon

2:affcc36a50b4


    25

    short block_align;





tom_coxon

2:affcc36a50b4


    26

    short sig_bps;





tom_coxon

2:affcc36a50b4


    27

} FMT_STRUCT;





tom_coxon

2:affcc36a50b4


    28







tom_coxon

2:affcc36a50b4


    29

class WavPlayer {





tom_coxon

2:affcc36a50b4


    30







tom_coxon

2:affcc36a50b4


    31

public:





tom_coxon

2:affcc36a50b4


    32







tom_coxon

2:affcc36a50b4


    33

    void play_wave(char *wavname);





tom_coxon

2:affcc36a50b4


    34







tom_coxon

2:affcc36a50b4


    35

private:





tom_coxon

2:affcc36a50b4


    36







tom_coxon

2:affcc36a50b4


    37

    void cleanup(char *);





tom_coxon

2:affcc36a50b4


    38

    void fill_adc_buf(short *, unsigned);





tom_coxon

2:affcc36a50b4


    39

    void swapword(unsigned *);





tom_coxon

2:affcc36a50b4


    40







tom_coxon

2:affcc36a50b4


    41

// a FIFO for the DAC





tom_coxon

2:affcc36a50b4


    42

    short DAC_fifo[256];





tom_coxon

2:affcc36a50b4


    43

    short DAC_wptr;





tom_coxon

2:affcc36a50b4


    44

    short DAC_rptr;





tom_coxon

2:affcc36a50b4


    45

    short DAC_on;





tom_coxon

2:affcc36a50b4


    46







tom_coxon

2:affcc36a50b4


    47

    void dac_out();





tom_coxon

2:affcc36a50b4


    48







tom_coxon

2:affcc36a50b4


    49

};





tom_coxon

2:affcc36a50b4


    50







tom_coxon

2:affcc36a50b4


    51

#endif