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24
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1 #ifndef AUDIO_H_
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2 #define AUDIO_H_
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3
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4 #define NUM_CHANNELS 4
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5
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6 typedef struct {
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7 int16_t *writebuffer;
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8 int16_t *playbuffer;
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9
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10 uint64_t buffer_fraction;
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11 uint64_t buffer_inc;
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12 uint32_t buffer_pos;
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13 uint32_t buffer_size;
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14
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15 uint32_t cycles;
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16 uint32_t clock_inc;
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17
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18 uint16_t timer_load[NUM_CHANNELS];
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19 uint16_t timer_cur[NUM_CHANNELS];
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20 int16_t value[NUM_CHANNELS];
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21 uint8_t volume[NUM_CHANNELS];
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22
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23 int16_t buffer[];
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24 } audio;
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25
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26 audio *alloc_audio(uint32_t master_clock, uint32_t clock_div, int sample_rate, int buffer_size);
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27 void audio_run(audio *context, uint32_t target);
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28 void audio_write_freq(audio *context, int channel, uint16_t value);
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29 void audio_write_vol(audio *context, int pair, uint16_t value);
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30
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31 #endif //AUDIO_H_
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