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55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
#include "dolphin/sipriv.h"
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#include "dolphin/vi.h"
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#pragma dont_inline on
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static u32 SamplingRate;
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typedef struct XY {
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u16 line;
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u8 count;
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} XY;
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static XY XYNTSC[12] = {
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{263 - 17, 2}, {15, 18}, {30, 9}, {44, 6}, {52, 5}, {65, 4},
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{87, 3}, {87, 3}, {87, 3}, {131, 2}, {131, 2}, {131, 2},
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};
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static XY XYPAL[12] = {
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{313 - 17, 2}, {15, 21}, {29, 11}, {45, 7}, {52, 6}, {63, 5},
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{78, 4}, {104, 3}, {104, 3}, {104, 3}, {104, 3}, {156, 2},
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};
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void SISetSamplingRate(u32 msec) {
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XY* xy;
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BOOL enabled;
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if (msec > 11) {
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msec = 11;
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}
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enabled = OSDisableInterrupts();
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SamplingRate = msec;
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switch (VIGetTvFormat()) {
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case VI_NTSC:
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case VI_MPAL:
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case VI_EURGB60:
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xy = XYNTSC;
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break;
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case VI_PAL:
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xy = XYPAL;
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break;
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default:
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OSReport("SISetSamplingRate: unknown TV format. Use default.");
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msec = 0;
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xy = XYNTSC;
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break;
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}
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SISetXY((__VIRegs[54] & 1 ? 2u : 1u) * xy[msec].line, xy[msec].count);
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OSRestoreInterrupts(enabled);
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}
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void SIRefreshSamplingRate() { SISetSamplingRate(SamplingRate); }
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#pragma dont_inline reset
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