www.pudn.com > gspmidi101src.zip > gspmidi_a.c

#include "win_inc.h" 
 
#include "config.h" 
#include "output.h" 
 
int OpenOutput(void); /* 0=success, 1=warning, -1=fatal error */ 
void CloseOutput(void); 
void OutputData(int32 *buf, int32 count); 
void FlushOutput(void); 
void PurgeOutput(void); 
 
#define dpm gsp_play_mode 
 
PlayMode dpm = { 
    DEFAULT_RATE, PE_16BIT | PE_SIGNED, 
    -1, 
	{16}, 
    "Windows wave mapper", 'd', 
    NULL, 
    OpenOutput, 
    CloseOutput, 
    OutputData, 
    FlushOutput, 
    PurgeOutput 
}; 
 
extern WAVEHDR* g_pHdr; 
 
__inline void s32tos16_2(int32 *lp, int16 *sp, int32 c) 
{ 
    int32 l; 
    while (c--) { 
        l = (*lp++) >> (32 - 16 - GUARD_BITS); 
        if (l > 32767) l= 32767; 
        else if (l < -32768) l= -32768; 
        *sp++ = (int16)(l); 
    } 
} 
 
__inline void s32tou8_2(int32 *lp, uint8 *cp, int32 c) 
{ 
    int32 l; 
    while (c--) { 
        l = (*lp++) >> (32 - 8 - GUARD_BITS); 
        if (l > 127) l= 127; 
        else if (l < -128) l= -128; 
        *cp++ = 0x80 ^ ((uint8)l); 
    } 
} 
 
int OpenOutput(void) 
{ 
	return 0; 
} 
 
 
void OutputData(int32 *buf, int32 count) 
{ 
	int converted; 
	if (dpm.encoding & PE_16BIT) 
		converted = count * 2; 
	else 
		converted = count; 
	if (!(dpm.encoding & PE_MONO)) 
		converted *= 2; 
 
	if (dpm.encoding & PE_16BIT) { 
		/* Convert data to signed 16-bit PCM */ 
		if (dpm.encoding & PE_MONO) 
			s32tos16_2(buf, (int16*)(g_pHdr->lpData + g_pHdr->dwBytesRecorded), count); 
		else 
			s32tos16_2(buf, (int16*)(g_pHdr->lpData + g_pHdr->dwBytesRecorded), count * 2); 
	} 
	else { 
		/* Convert to 8-bit unsigned. */ 
		if (dpm.encoding & PE_MONO) 
			s32tou8_2(buf, (uint8*)(g_pHdr->lpData + g_pHdr->dwBytesRecorded), count); 
		else 
			s32tou8_2(buf, (uint8*)(g_pHdr->lpData + g_pHdr->dwBytesRecorded), count * 2); 
	} 
 
	g_pHdr->dwBytesRecorded += converted; 
} 
 
void CloseOutput(void) 
{ 
} 
 
void FlushOutput(void) 
{ 
} 
 
void PurgeOutput(void) 
{ 
} 
 
int GetSampleCount(int len) 
{ 
	int ret = len; 
	if (dpm.encoding & PE_16BIT) 
		ret /= 2; 
 
	if (!(dpm.encoding & PE_MONO)) 
		ret /= 2; 
 
	return ret; 
}