audio.hch

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#ifndef _AUDIO_HCH
#define _AUDIO_HCH 1

/*
 * Type definition of the shared memory to be used in various processes
 */
typedef struct {
        mpram {
                ram unsigned 7 write[256];      
                rom unsigned 7 read[256];
        } fft_info with { block = "BlockRAM"};
        mpram {
                ram unsigned 6 write[256];      
                rom unsigned 6 read[256];
        } ifft_info with { block = "BlockRAM"};
        unsigned 4 *equalizer_levels_ptr;
        unsigned 1 display_log;
} audiodata_t;




/*
 * States used to indicate wether audio data is sampled.
 */
#define AUDIO_NOT_READY 0
#define AUDIO_READY     1



/*
 * Line in or Mic in aliases for audio_init.
 */
#define LINE_IN RC200AudioInLineIn
#define MIC_IN  RC200AudioInMicrophone



/*
 * Sample Rate Aliases for audio_init.
 */
#define SR_8000         RC200AudioSampleRate8000
#define SR_11025        RC200AudioSampleRate11025
#define SR_16000        RC200AudioSampleRate16000
#define SR_22050        RC200AudioSampleRate22050
#define SR_44100        RC200AudioSampleRate44100
#define SR_48000        RC200AudioSampleRate48000



/*
 * Initialize the Audio sub-system. gain_level sets the internal amplifier to
 * passed level, input_source chooses between line in or mic in. The
 * sample_rate is set to supplied rate. Defines for these are mentioned above.
 */
macro proc audio_init(gain_level, input_source, sample_rate, AUDIOIN, AUDIOOUT);



/*
 * Main audiodriver loop. This procedure never returns! It handles audio io and
 * updates the shared memory. It needs Audio I/O handlers passed.
 */
macro proc audio_main(audiodata, AUDIOIN, AUDIOOUT);

#else
#error "ERROR file audio.hch multiple times included"
#endif /* --- _AUDIO_HCH --- */

---