1 files changed, 82 insertions, 0 deletions
diff --git a/psxdev/xadecode.h b/psxdev/xadecode.h
new file mode 100644
index 0000000..264012c
--- /dev/null
+++ b/psxdev/xadecode.h
@@ -0,0 +1,82 @@
+/*
+	author: unknown, probably bitmaster?
+	slightly modified by dbalster
+*/
+
+#ifndef XADECODE_H
+#define XADECODE_H
+
+#define USE_FXD 1
+
+#define kNumOfSamples   224
+#define kNumOfSGs       18
+
+#define XAFile			0
+#define XAChannel		1
+#define XAType			2
+#define XAFlags			3
+/* bits in XAFlags byte */
+#define XAFStereo		1<<0
+#define XAFHalfHz		1<<2
+
+#define XAAUDIO		0x64
+#define XAVIDEO		0x48
+#define XABREAK		0xE4
+#define XACURRENT	0x100	/* for application use only! */
+#define XANONE		0x200	/* for application use only! */
+#define XAAV		0x400	/* for application use only! */
+
+#define max(a,b) (a<b?b:a)
+#define min(a,b) (a>b?b:a)
+
+#define FXD_FxdToPCM(dt)			(max(min((short)((dt)>>16), 32767), -32768))
+#define DblToPCM(dt)				(short)(max(min((dt), 32767), -32768))
+
+#define WHP_READ68_AUTO(fp, dt)		WHP_Read68(dt, sizeof(*(dt)), 1, fp)
+#define WHP_WRITE68_AUTO(fp, dt)	WHP_Write68(dt, sizeof(*(dt)), 1, fp)
+
+#define WHP_CNV_SHORT68(dt, ndt)	WHP_CnvEndianShort((dt), (ndt))
+#define WHP_CNV_LONG68(dt, ndt)		WHP_CnvEndianLong((dt), (ndt))
+
+#if USE_FXD
+#define FXD_FxdToPcm16(dt)			(max(min((dt)/2, 32767), -32768))
+#define FXD_Pcm16ToFxd(dt)			((long)dt*2)
+#endif
+
+#define XAWAVBUFSIZE (kNumOfSamples*kNumOfSGs*2)
+
+typedef char SoundGroup[128];
+
+typedef struct SoundSector {
+	char            sectorFiller[8];
+	SoundGroup      SoundGroups[kNumOfSGs];
+} __attribute__((packed)) SoundSector;
+
+typedef unsigned long DWORD;
+typedef unsigned short WORD;
+
+#if USE_FXD
+typedef long FXD;
+#endif
+
+long decodeSoundSect(SoundSector *ssct, char *wav);
+long decodeSoundSect1(SoundSector *ssct, char *wav);
+long convXaToWave(char *adp, char *wav, int cn, int fn_s, int fn_e);
+void initXaDecode(void);
+void switchXaDecode(int channel);
+void saveXaDecode(int channel);
+void reinitXaDecode(int channel);
+signed char getSoundData(char *buf, long unit, long sample);
+signed char getFilter(char *buf, long unit);
+signed char getRange(char *buf, long unit);
+char xachannel(SoundSector *ss);
+unsigned char xatype(SoundSector *ss);
+char xafileno(SoundSector *ss);
+char xastereo(SoundSector *ss);
+char xahalfhz(SoundSector *ss);
+
+#if USE_FXD
+FXD FXD_FixMul(FXD a, FXD b);
+#endif
+
+#endif