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- Getting/setting MPEG playback position also includes the end offset. Hopefully will fix save states from crashing when reloaded sometimes in DSB1 and DSB2 games.

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This commit is contained in:
Bart Trzynadlowski 2011-09-22 18:04:39 +00:00
parent a1346b57f5
commit 4527014e75
3 changed files with 50 additions and 30 deletions
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45
Src/Model3/DSB.cpp
View file

@ -347,20 +347,23 @@ void CDSB1::IOWrite8(UINT32 addr, UINT8 data)
UINT8 CDSB1::IORead8(UINT32 addr)
{
int progress;
int progress, end;
switch ((addr&0xFF))
{
case 0xE2: // MPEG position, high byte
progress = MPEG_GetProgress() + mpegStart; // byte address currently playing
MPEG_GetPlayPosition(&progress, &end);
progress += mpegStart; // byte address currently playing
return (progress>>16)&0xFF;
case 0xE3: // MPEG position, middle byte
progress = MPEG_GetProgress() + mpegStart;
MPEG_GetPlayPosition(&progress, &end);
progress += mpegStart;
return (progress>>8)&0xFF;
case 0xE4: // MPEG position, low byte
progress = MPEG_GetProgress() + mpegStart;
MPEG_GetPlayPosition(&progress, &end);
progress += mpegStart;
return progress&0xFF;
case 0xF0: // Latch
@ -475,16 +478,20 @@ void CDSB1::Reset(void)
void CDSB1::SaveState(CBlockFile *StateFile)
{
UINT32 mpegPos;
int i, j;
UINT32 playOffset, endOffset;
UINT8 isPlaying;
StateFile->NewBlock("DSB1", __FILE__);
// MPEG playback state
isPlaying = (UINT8) MPEG_IsPlaying();
mpegPos = MPEG_GetProgress();
MPEG_GetPlayPosition(&i, &j);
playOffset = (UINT32) i; // in case sizeof(int) != sizeof(INT32)
endOffset = (UINT32) j;
StateFile->Write(&isPlaying, sizeof(isPlaying));
StateFile->Write(&mpegPos, sizeof(mpegPos));
StateFile->Write(&playOffset, sizeof(playOffset));
StateFile->Write(&endOffset, sizeof(endOffset));
StateFile->Write(&usingMPEGStart, sizeof(usingMPEGStart));
StateFile->Write(&usingMPEGEnd, sizeof(usingMPEGEnd));
StateFile->Write(&usingLoopStart, sizeof(usingLoopStart));
@ -511,7 +518,7 @@ void CDSB1::SaveState(CBlockFile *StateFile)
void CDSB1::LoadState(CBlockFile *StateFile)
{
UINT32 mpegPos;
UINT32 playOffset, endOffset;
UINT8 isPlaying;
if (OKAY != StateFile->FindBlock("DSB1"))
@ -521,7 +528,8 @@ void CDSB1::LoadState(CBlockFile *StateFile)
}
StateFile->Read(&isPlaying, sizeof(isPlaying));
StateFile->Read(&mpegPos, sizeof(mpegPos));
StateFile->Read(&playOffset, sizeof(playOffset));
StateFile->Read(&endOffset, sizeof(endOffset));
StateFile->Read(&usingMPEGStart, sizeof(usingMPEGStart));
StateFile->Read(&usingMPEGEnd, sizeof(usingMPEGEnd));
StateFile->Read(&usingLoopStart, sizeof(usingLoopStart));
@ -548,7 +556,7 @@ void CDSB1::LoadState(CBlockFile *StateFile)
MPEG_PlayMemory((const char *) &mpegROM[usingMPEGStart], usingMPEGEnd-usingMPEGStart);
if (usingLoopEnd != 0) // only if looping was actually enabled
MPEG_SetLoop((const char *) &mpegROM[usingLoopStart], usingLoopEnd);
MPEG_SetOffset(mpegPos);
MPEG_SetPlayPosition(playOffset, endOffset);
}
else
MPEG_StopPlaying();
@ -1036,16 +1044,20 @@ void CDSB2::Reset(void)
void CDSB2::SaveState(CBlockFile *StateFile)
{
UINT32 mpegPos;
int i, j;
UINT32 playOffset, endOffset;
UINT8 isPlaying;
StateFile->NewBlock("DSB2", __FILE__);
// MPEG playback state
isPlaying = (UINT8) MPEG_IsPlaying();
mpegPos = MPEG_GetProgress();
MPEG_GetPlayPosition(&i, &j);
playOffset = (UINT32) i; // in case sizeof(int) != sizeof(INT32)
endOffset = (UINT32) j;
StateFile->Write(&isPlaying, sizeof(isPlaying));
StateFile->Write(&mpegPos, sizeof(mpegPos));
StateFile->Write(&playOffset, sizeof(playOffset));
StateFile->Write(&endOffset, sizeof(endOffset));
StateFile->Write(&usingMPEGStart, sizeof(usingMPEGStart));
StateFile->Write(&usingMPEGEnd, sizeof(usingMPEGEnd));
StateFile->Write(&usingLoopStart, sizeof(usingLoopStart));
@ -1076,7 +1088,7 @@ void CDSB2::SaveState(CBlockFile *StateFile)
void CDSB2::LoadState(CBlockFile *StateFile)
{
UINT32 mpegPos;
UINT32 playOffset, endOffset;
UINT8 isPlaying;
if (OKAY != StateFile->FindBlock("DSB2"))
@ -1086,7 +1098,8 @@ void CDSB2::LoadState(CBlockFile *StateFile)
}
StateFile->Read(&isPlaying, sizeof(isPlaying));
StateFile->Read(&mpegPos, sizeof(mpegPos));
StateFile->Read(&playOffset, sizeof(playOffset));
StateFile->Read(&endOffset, sizeof(endOffset));
StateFile->Read(&usingMPEGStart, sizeof(usingMPEGStart));
StateFile->Read(&usingMPEGEnd, sizeof(usingMPEGEnd));
StateFile->Read(&usingLoopStart, sizeof(usingLoopStart));
@ -1113,7 +1126,7 @@ void CDSB2::LoadState(CBlockFile *StateFile)
MPEG_PlayMemory((const char *) &mpegROM[usingMPEGStart], usingMPEGEnd-usingMPEGStart);
if (usingLoopEnd != 0) // only if looping was actually enabled
MPEG_SetLoop((const char *) &mpegROM[usingLoopStart], usingLoopEnd);
MPEG_SetOffset(mpegPos);
MPEG_SetPlayPosition(playOffset, endOffset);
}
else
MPEG_StopPlaying();

20
Src/Sound/MPEG/MPEG.h
View file

@ -48,23 +48,27 @@
extern bool MPEG_IsPlaying(void);
/*
* MPEG_GetProgress(void):
* MPEG_GetPlayPosition(playOffset, endOffset):
*
* Returns:
* The current byte offset within the MPEG stream, relative to the start.
* Obtains the current playback and end offsets of the MPEG stream.
*
* Parameters:
* playOffset Pointer to which playback byte offset will be written.
* endOffset Pointer to which end offset will be written.
*/
extern int MPEG_GetProgress(void);
extern void MPEG_GetPlayPosition(int *playOffset, int *endOffset);
/*
* MPEG_SetOffset(pos):
* MPEG_SetPlayPosition(playOffset, endOffset):
*
* Sets the playback position within an MPEG stream.
*
* Parameters:
* pos Byte offset relative to the beginning of the current MPEG
* stream.
* playOffset Playback byte offset (relative to beginning of the current
* MPEG stream).
* endOffset End offset.
*/
extern void MPEG_SetOffset(int pos);
extern void MPEG_SetPlayPosition(int playOffset, int endOffset);
/*
* MPEG_SetLoop(loop, loopend):

15
Src/Sound/MPEG/getbits.cpp
View file

@ -48,16 +48,19 @@
static const char *fstart, *lstart;
static int offset, end, eof, lend;
int MPEG_GetProgress(void)
void MPEG_GetPlayPosition(int *playOffset, int *endOffset)
{
if (in_file) return ftell(in_file);
return offset;
if (in_file)
*playOffset = ftell(in_file);
else
*playOffset = offset;
*endOffset = end;
}
void MPEG_SetOffset(int pos)
void MPEG_SetPlayPosition(int playOffset, int endOffset)
{
offset = pos;
offset = playOffset;
end = endOffset;
}
void m1setfile(const char *mstart, int mend)