diff options
Diffstat (limited to 'libopna/opnassg.h')
| -rw-r--r-- | libopna/opnassg.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/libopna/opnassg.h b/libopna/opnassg.h index 0321163..231db4d 100644 --- a/libopna/opnassg.h +++ b/libopna/opnassg.h @@ -8,6 +8,9 @@ extern "C" { #endif +#define OPNA_SSG_SINCTABLEBIT 7 +#define OPNA_SSG_SINCTABLELEN (1<<OPNA_SSG_SINCTABLEBIT) + struct opna_ssg_ch { uint16_t tone_counter; bool out; @@ -30,7 +33,7 @@ struct opna_ssg { }; struct opna_ssg_resampler { - int16_t buf[(1<<7)*3]; + int16_t buf[OPNA_SSG_SINCTABLELEN*3 * 2]; unsigned index; }; @@ -58,6 +61,14 @@ unsigned opna_ssg_readreg(const struct opna_ssg *ssg, unsigned reg); int opna_ssg_channel_level(const struct opna_ssg *ssg, int ch); unsigned opna_ssg_tone_period(const struct opna_ssg *ssg, int ch); +typedef void (*opna_ssg_sinc_calc_func_type)(unsigned resampler_index, + const int16_t *inbuf, int32_t *outbuf); +extern opna_ssg_sinc_calc_func_type opna_ssg_sinc_calc_func; +void opna_ssg_sinc_calc_c(unsigned resampler_index, + const int16_t *inbuf, int32_t *outbuf); + +extern const int16_t opna_ssg_sinctable[OPNA_SSG_SINCTABLELEN*2]; + #ifdef __cplusplus } #endif |