mirror of
https://github.com/dborth/snes9xgx.git
synced 2024-11-27 21:14:21 +01:00
445 lines
8.8 KiB
C++
445 lines
8.8 KiB
C++
/*****************************************************************************\
|
|
Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
|
|
This file is licensed under the Snes9x License.
|
|
For further information, consult the LICENSE file in the root directory.
|
|
\*****************************************************************************/
|
|
|
|
#include "snes9x.h"
|
|
#include "memmap.h"
|
|
#include "display.h"
|
|
#include "msu1.h"
|
|
#include "apu/blargg_endian.h"
|
|
#include <fstream>
|
|
#include <sys/stat.h>
|
|
|
|
STREAM dataStream = NULL;
|
|
STREAM audioStream = NULL;
|
|
uint32 audioLoopPos;
|
|
size_t partial_frames;
|
|
|
|
// Sample buffer
|
|
int16 *bufPos, *bufBegin, *bufEnd;
|
|
|
|
#ifdef UNZIP_SUPPORT
|
|
static int unzFindExtension(unzFile &file, const char *ext, bool restart = TRUE, bool print = TRUE, bool allowExact = FALSE)
|
|
{
|
|
unz_file_info info;
|
|
int port, l = strlen(ext), e = allowExact ? 0 : 1;
|
|
|
|
if (restart)
|
|
port = unzGoToFirstFile(file);
|
|
else
|
|
port = unzGoToNextFile(file);
|
|
|
|
while (port == UNZ_OK)
|
|
{
|
|
int len;
|
|
char name[132];
|
|
|
|
unzGetCurrentFileInfo(file, &info, name, 128, NULL, 0, NULL, 0);
|
|
len = strlen(name);
|
|
|
|
if (len >= l + e && strcasecmp(name + len - l, ext) == 0 && unzOpenCurrentFile(file) == UNZ_OK)
|
|
{
|
|
if (print)
|
|
printf("Using msu file %s", name);
|
|
|
|
return (port);
|
|
}
|
|
|
|
port = unzGoToNextFile(file);
|
|
}
|
|
|
|
return (port);
|
|
}
|
|
#endif
|
|
|
|
STREAM S9xMSU1OpenFile(const char *msu_ext, bool skip_unpacked)
|
|
{
|
|
#ifdef GEKKO
|
|
char filename[1024];
|
|
sprintf(filename, "%s%s%s", Memory.ROMFilePath, Memory.ROMFilename, msu_ext);
|
|
#else
|
|
const char *filename = S9xGetFilename(msu_ext, ROMFILENAME_DIR);
|
|
#endif
|
|
|
|
STREAM file = 0;
|
|
|
|
if (!skip_unpacked)
|
|
{
|
|
file = OPEN_STREAM(filename, "rb");
|
|
if (file)
|
|
printf("Using msu file %s.\n", filename);
|
|
}
|
|
|
|
#ifdef UNZIP_SUPPORT
|
|
// look for msu1 pack file in the rom or patch dir if msu data file not found in rom dir
|
|
if (!file)
|
|
{
|
|
const char *zip_filename = S9xGetFilename(".msu1", ROMFILENAME_DIR);
|
|
unzFile unzFile = unzOpen(zip_filename);
|
|
|
|
if (!unzFile)
|
|
{
|
|
zip_filename = S9xGetFilename(".msu1", PATCH_DIR);
|
|
unzFile = unzOpen(zip_filename);
|
|
}
|
|
|
|
if (unzFile)
|
|
{
|
|
int port = unzFindExtension(unzFile, msu_ext, true, true, true);
|
|
if (port == UNZ_OK)
|
|
{
|
|
printf(" in %s.\n", zip_filename);
|
|
file = new unzStream(unzFile);
|
|
}
|
|
else
|
|
unzClose(unzFile);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return file;
|
|
}
|
|
|
|
static void AudioClose()
|
|
{
|
|
if (audioStream)
|
|
{
|
|
CLOSE_STREAM(audioStream);
|
|
audioStream = NULL;
|
|
}
|
|
}
|
|
|
|
static bool AudioOpen()
|
|
{
|
|
MSU1.MSU1_STATUS |= AudioError;
|
|
|
|
AudioClose();
|
|
|
|
char ext[_MAX_EXT];
|
|
snprintf(ext, _MAX_EXT, "-%d.pcm", MSU1.MSU1_CURRENT_TRACK);
|
|
|
|
audioStream = S9xMSU1OpenFile(ext);
|
|
if (audioStream)
|
|
{
|
|
if (GETC_STREAM(audioStream) != 'M')
|
|
return false;
|
|
if (GETC_STREAM(audioStream) != 'S')
|
|
return false;
|
|
if (GETC_STREAM(audioStream) != 'U')
|
|
return false;
|
|
if (GETC_STREAM(audioStream) != '1')
|
|
return false;
|
|
|
|
READ_STREAM((char *)&audioLoopPos, 4, audioStream);
|
|
audioLoopPos = GET_LE32(&audioLoopPos);
|
|
audioLoopPos <<= 2;
|
|
audioLoopPos += 8;
|
|
|
|
MSU1.MSU1_AUDIO_POS = 8;
|
|
|
|
MSU1.MSU1_STATUS &= ~AudioError;
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
static void DataClose()
|
|
{
|
|
if (dataStream)
|
|
{
|
|
CLOSE_STREAM(dataStream);
|
|
dataStream = NULL;
|
|
}
|
|
}
|
|
|
|
static bool DataOpen()
|
|
{
|
|
DataClose();
|
|
|
|
dataStream = S9xMSU1OpenFile(".msu");
|
|
|
|
if(!dataStream)
|
|
dataStream = S9xMSU1OpenFile("msu1.rom");
|
|
|
|
return dataStream != NULL;
|
|
}
|
|
|
|
void S9xResetMSU(void)
|
|
{
|
|
MSU1.MSU1_STATUS = 0;
|
|
MSU1.MSU1_DATA_SEEK = 0;
|
|
MSU1.MSU1_DATA_POS = 0;
|
|
MSU1.MSU1_TRACK_SEEK = 0;
|
|
MSU1.MSU1_CURRENT_TRACK = 0;
|
|
MSU1.MSU1_RESUME_TRACK = 0;
|
|
MSU1.MSU1_VOLUME = 0;
|
|
MSU1.MSU1_CONTROL = 0;
|
|
MSU1.MSU1_AUDIO_POS = 0;
|
|
MSU1.MSU1_RESUME_POS = 0;
|
|
|
|
|
|
bufPos = 0;
|
|
bufBegin = 0;
|
|
bufEnd = 0;
|
|
|
|
partial_frames = 0;
|
|
|
|
DataClose();
|
|
|
|
AudioClose();
|
|
|
|
Settings.MSU1 = S9xMSU1ROMExists();
|
|
}
|
|
|
|
void S9xMSU1Init(void)
|
|
{
|
|
DataOpen();
|
|
}
|
|
|
|
void S9xMSU1DeInit(void)
|
|
{
|
|
DataClose();
|
|
AudioClose();
|
|
}
|
|
|
|
bool S9xMSU1ROMExists(void)
|
|
{
|
|
STREAM s = S9xMSU1OpenFile(".msu");
|
|
if (s)
|
|
{
|
|
CLOSE_STREAM(s);
|
|
return true;
|
|
}
|
|
#ifdef UNZIP_SUPPORT
|
|
char drive[_MAX_DRIVE + 1], dir[_MAX_DIR + 1], def[_MAX_FNAME + 1], ext[_MAX_EXT + 1];
|
|
_splitpath(Memory.ROMFilename, drive, dir, def, ext);
|
|
if (!strcasecmp(ext, ".msu1"))
|
|
return true;
|
|
|
|
unzFile unzFile = unzOpen(S9xGetFilename(".msu1", ROMFILENAME_DIR));
|
|
|
|
if(!unzFile)
|
|
unzFile = unzOpen(S9xGetFilename(".msu1", PATCH_DIR));
|
|
|
|
if (unzFile)
|
|
{
|
|
unzClose(unzFile);
|
|
return true;
|
|
}
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
void S9xMSU1Generate(size_t sample_count)
|
|
{
|
|
partial_frames += 4410 * (sample_count / 2);
|
|
|
|
while ((bufPos < (bufEnd - 2)) && partial_frames >= 3204)
|
|
{
|
|
if (MSU1.MSU1_STATUS & AudioPlaying && audioStream)
|
|
{
|
|
int32 sample;
|
|
int16* left = (int16*)&sample;
|
|
int16* right = left + 1;
|
|
|
|
int bytes_read = READ_STREAM((char *)&sample, 4, audioStream);
|
|
if (bytes_read == 4)
|
|
{
|
|
*left = ((int32)(int16)GET_LE16(left) * MSU1.MSU1_VOLUME / 255);
|
|
*right = ((int32)(int16)GET_LE16(right) * MSU1.MSU1_VOLUME / 255);
|
|
|
|
|
|
*(bufPos++) = *left;
|
|
*(bufPos++) = *right;
|
|
MSU1.MSU1_AUDIO_POS += 4;
|
|
partial_frames -= 3204;
|
|
}
|
|
else
|
|
if (bytes_read >= 0)
|
|
{
|
|
if (MSU1.MSU1_STATUS & AudioRepeating)
|
|
{
|
|
MSU1.MSU1_AUDIO_POS = audioLoopPos;
|
|
REVERT_STREAM(audioStream, MSU1.MSU1_AUDIO_POS, 0);
|
|
}
|
|
else
|
|
{
|
|
MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating);
|
|
REVERT_STREAM(audioStream, 8, 0);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating);
|
|
partial_frames -= 3204;
|
|
*(bufPos++) = 0;
|
|
*(bufPos++) = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
uint8 S9xMSU1ReadPort(uint8 port)
|
|
{
|
|
switch (port)
|
|
{
|
|
case 0:
|
|
return MSU1.MSU1_STATUS | MSU1_REVISION;
|
|
case 1:
|
|
{
|
|
if (MSU1.MSU1_STATUS & DataBusy)
|
|
return 0;
|
|
if (!dataStream)
|
|
return 0;
|
|
int data = GETC_STREAM(dataStream);
|
|
if (data >= 0)
|
|
{
|
|
MSU1.MSU1_DATA_POS++;
|
|
return data;
|
|
}
|
|
return 0;
|
|
}
|
|
case 2:
|
|
return 'S';
|
|
case 3:
|
|
return '-';
|
|
case 4:
|
|
return 'M';
|
|
case 5:
|
|
return 'S';
|
|
case 6:
|
|
return 'U';
|
|
case 7:
|
|
return '1';
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
void S9xMSU1WritePort(uint8 port, uint8 byte)
|
|
{
|
|
switch (port)
|
|
{
|
|
case 0:
|
|
MSU1.MSU1_DATA_SEEK &= 0xFFFFFF00;
|
|
MSU1.MSU1_DATA_SEEK |= byte << 0;
|
|
break;
|
|
case 1:
|
|
MSU1.MSU1_DATA_SEEK &= 0xFFFF00FF;
|
|
MSU1.MSU1_DATA_SEEK |= byte << 8;
|
|
break;
|
|
case 2:
|
|
MSU1.MSU1_DATA_SEEK &= 0xFF00FFFF;
|
|
MSU1.MSU1_DATA_SEEK |= byte << 16;
|
|
break;
|
|
case 3:
|
|
MSU1.MSU1_DATA_SEEK &= 0x00FFFFFF;
|
|
MSU1.MSU1_DATA_SEEK |= byte << 24;
|
|
MSU1.MSU1_DATA_POS = MSU1.MSU1_DATA_SEEK;
|
|
if (dataStream)
|
|
{
|
|
REVERT_STREAM(dataStream, MSU1.MSU1_DATA_POS, 0);
|
|
}
|
|
break;
|
|
case 4:
|
|
MSU1.MSU1_TRACK_SEEK &= 0xFF00;
|
|
MSU1.MSU1_TRACK_SEEK |= byte;
|
|
break;
|
|
case 5:
|
|
MSU1.MSU1_TRACK_SEEK &= 0x00FF;
|
|
MSU1.MSU1_TRACK_SEEK |= (byte << 8);
|
|
MSU1.MSU1_CURRENT_TRACK = MSU1.MSU1_TRACK_SEEK;
|
|
|
|
MSU1.MSU1_STATUS &= ~AudioPlaying;
|
|
MSU1.MSU1_STATUS &= ~AudioRepeating;
|
|
|
|
if (AudioOpen())
|
|
{
|
|
if (MSU1.MSU1_CURRENT_TRACK == MSU1.MSU1_RESUME_TRACK)
|
|
{
|
|
MSU1.MSU1_AUDIO_POS = MSU1.MSU1_RESUME_POS;
|
|
MSU1.MSU1_RESUME_POS = 0;
|
|
MSU1.MSU1_RESUME_TRACK = ~0;
|
|
}
|
|
else
|
|
{
|
|
MSU1.MSU1_AUDIO_POS = 8;
|
|
}
|
|
|
|
REVERT_STREAM(audioStream, MSU1.MSU1_AUDIO_POS, 0);
|
|
}
|
|
break;
|
|
case 6:
|
|
MSU1.MSU1_VOLUME = byte;
|
|
break;
|
|
case 7:
|
|
if (MSU1.MSU1_STATUS & (AudioBusy | AudioError))
|
|
break;
|
|
|
|
MSU1.MSU1_STATUS = (MSU1.MSU1_STATUS & ~0x30) | ((byte & 0x03) << 4);
|
|
|
|
if ((byte & (Play | Resume)) == Resume)
|
|
{
|
|
MSU1.MSU1_RESUME_TRACK = MSU1.MSU1_CURRENT_TRACK;
|
|
MSU1.MSU1_RESUME_POS = MSU1.MSU1_AUDIO_POS;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
size_t S9xMSU1Samples(void)
|
|
{
|
|
return bufPos - bufBegin;
|
|
}
|
|
|
|
void S9xMSU1SetOutput(int16 * out, size_t size)
|
|
{
|
|
bufPos = bufBegin = out;
|
|
bufEnd = out + size;
|
|
}
|
|
|
|
void S9xMSU1PostLoadState(void)
|
|
{
|
|
if (DataOpen())
|
|
{
|
|
REVERT_STREAM(dataStream, MSU1.MSU1_DATA_POS, 0);
|
|
}
|
|
|
|
if (MSU1.MSU1_STATUS & AudioPlaying)
|
|
{
|
|
uint32 savedPosition = MSU1.MSU1_AUDIO_POS;
|
|
|
|
if (AudioOpen())
|
|
{
|
|
REVERT_STREAM(audioStream, 4, 0);
|
|
READ_STREAM((char *)&audioLoopPos, 4, audioStream);
|
|
audioLoopPos = GET_LE32(&audioLoopPos);
|
|
audioLoopPos <<= 2;
|
|
audioLoopPos += 8;
|
|
|
|
MSU1.MSU1_AUDIO_POS = savedPosition;
|
|
REVERT_STREAM(audioStream, MSU1.MSU1_AUDIO_POS, 0);
|
|
}
|
|
else
|
|
{
|
|
MSU1.MSU1_STATUS &= ~(AudioPlaying | AudioRepeating);
|
|
MSU1.MSU1_STATUS |= AudioError;
|
|
}
|
|
}
|
|
|
|
bufPos = 0;
|
|
bufBegin = 0;
|
|
bufEnd = 0;
|
|
|
|
partial_frames = 0;
|
|
}
|