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49 lines
1.7 KiB
C
49 lines
1.7 KiB
C
#include <pico/sound/ym2612.h>
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// max 16 jobs, lower num means higher prio
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enum _940_job_t {
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JOB940_INITALL = 1,
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JOB940_INVALIDATE_DCACHE,
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JOB940_YM2612RESETCHIP,
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JOB940_YM2612UPDATEONE,
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JOB940_MP3DECODE,
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JOB940_PICOSTATELOAD,
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JOB940_PICOSTATESAVE2,
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JOB940_PICOSTATELOAD2_PREP,
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JOB940_PICOSTATELOAD2,
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JOB940_MP3RESET,
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};
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//#define MAX_940JOBS 2
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typedef struct
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{
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YM2612 ym2612; /* current state of the emulated YM2612 */
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void *mp3dec; /* mp3 decoder's handle */
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int ym_buffer[44100/50*2]; /* this is where the YM2612 samples will be mixed to */
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short mp3_buffer[2][1152*2]; /* buffers for mp3 decoder's output */
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} _940_data_t;
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typedef struct
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{
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int vstarts[8]; /* debug: 00: number of starts from each of 8 vectors */
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int last_lr; /* debug: 20: last exception's lr */
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// int jobs[MAX_940JOBS]; /* jobs for second core */
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// int busy_; /* unused */
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int length; /* number of samples to mix (882 max) */
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int stereo; /* mix samples as stereo, doubles sample count automatically */
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int baseclock; /* ym2612 settings */
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int rate;
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int writebuffsel; /* which write buffer to use (from 940 side) */
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UINT16 writebuff0[2048]; /* list of writes to ym2612, 1024 for savestates, 1024 extra */
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UINT16 writebuff1[2048];
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int ym_active_chs;
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int mp3_len; /* data len of loaded mp3 */
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int mp3_offs; /* current playback offset (just after last decoded frame) */
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int mp3_buffsel; /* which output buffer to decode to */
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int loopc; /* debug: main loop counter */
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int mp3_errors; /* debug: mp3 decoder's error counter */
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int mp3_lasterr; /* debug: mp3 decoder's last error */
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int lastjob; /* debug: last job id */
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} _940_ctl_t;
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