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libvgm: Add exception handling, and move buffer

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Move the player buffer off the stack, as well as adding exception
handlers to the init, playback, and shutdown code.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
This commit is contained in:
Christopher Snowhill 2025-07-15 06:50:03 -07:00
parent 0263367639
commit 5b51e664e2
2 changed files with 111 additions and 85 deletions
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1
Plugins/libvgmPlayer/libvgmDecoder.h
View file

@ -19,6 +19,7 @@
DATA_LOADER* dLoad;
PlayerA* mainPlr;
id<CogSource> source;
UINT8* sampleBuffer;
double sampleRate;
long loopCount;
double fadeTime;

45
Plugins/libvgmPlayer/libvgmDecoder.mm
View file

@ -24,6 +24,8 @@
@implementation libvgmDecoder
enum { bufferSize = 1024 };
#ifdef _DEBUG
const int logLevel = DEVLOG_DEBUG;
#else
@ -99,6 +101,7 @@ const int masterVol = 0x10000; // Fixed point 16.16
fileData = NULL;
dLoad = NULL;
mainPlr = NULL;
sampleBuffer = NULL;
}
return self;
}
@ -130,6 +133,7 @@ const int masterVol = 0x10000; // Fixed point 16.16
BOOL repeatOne = IsRepeatOneSet();
uint32_t maxLoops = repeatOne ? 0 : (uint32_t)loopCount;
try {
mainPlr = new PlayerA;
mainPlr->RegisterPlayerEngine(new VGMPlayer);
mainPlr->RegisterPlayerEngine(new S98Player);
@ -186,6 +190,14 @@ const int masterVol = 0x10000; // Fixed point 16.16
[self setTrackEnded:NO];
mainPlr->Start();
} catch(std::exception& e) {
ALog(@"Exception caught opening file: %s\n", e.what());
return NO;
}
sampleBuffer = (UINT8*) malloc(bufferSize * numChannels * (numBitsPerSample / 8));
if(!sampleBuffer)
return NO;
[self willChangeValueForKey:@"properties"];
[self didChangeValueForKey:@"properties"];
@ -215,15 +227,18 @@ const int masterVol = 0x10000; // Fixed point 16.16
id audioChunkClass = NSClassFromString(@"AudioChunk");
AudioChunk* chunk = [[audioChunkClass alloc] initWithProperties:[self properties]];
int frames = 1024;
const size_t bytesPerFrame = [chunk format].mBytesPerFrame;
uint8_t buffer[frames * bytesPerFrame];
int frames = bufferSize;
const int bytesPerFrame = [chunk format].mBytesPerFrame;
void* buf = (void*)buffer;
void* buf = (void*)sampleBuffer;
BOOL repeatOne = IsRepeatOneSet();
uint32_t maxLoops = repeatOne ? 0 : (uint32_t)loopCount;
double streamTimestamp;
UInt32 framesDone = 0;
try {
PlayerBase* player = mainPlr->GetPlayer();
mainPlr->SetLoopCount(maxLoops);
if(player->GetPlayerType() == FCC_VGM) {
@ -231,31 +246,33 @@ const int masterVol = 0x10000; // Fixed point 16.16
mainPlr->SetLoopCount(vgmplay->GetModifiedLoopCount(maxLoops));
}
double streamTimestamp = mainPlr->GetCurTime(0);
UInt32 framesDone = 0;
streamTimestamp = mainPlr->GetCurTime(0);
while(framesDone < frames) {
UInt32 framesToDo = frames - framesDone;
if(framesToDo > smplAlloc)
framesToDo = smplAlloc;
int numSamples = framesToDo * numChannels * (numBitsPerSample / 8);
int numSamples = framesToDo * bytesPerFrame;
UINT32 numRendered = mainPlr->Render(numSamples, buf);
buf = (void*)(((uint8_t*)buf) + numRendered);
UINT32 framesRendered = numRendered / (numChannels * (numBitsPerSample / 8));
UINT32 framesRendered = numRendered / bytesPerFrame;
framesDone += framesRendered;
if(framesRendered < framesToDo)
break;
}
} catch(std::exception& e) {
ALog(@"Exception caught while playing track: %s\n", e.what());
return nil;
}
[chunk setStreamTimestamp:streamTimestamp];
[chunk assignSamples:buffer frameCount:framesDone];
[chunk assignSamples:sampleBuffer frameCount:framesDone];
return chunk;
}
@ -269,6 +286,11 @@ const int masterVol = 0x10000; // Fixed point 16.16
}
- (void)close {
if(sampleBuffer) {
free(sampleBuffer);
sampleBuffer = NULL;
}
try {
if(mainPlr) {
mainPlr->Stop();
mainPlr->UnloadFile();
@ -280,6 +302,9 @@ const int masterVol = 0x10000; // Fixed point 16.16
DataLoader_Deinit(dLoad);
dLoad = NULL;
}
} catch(std::exception& e) {
ALog(@"Exception caught cleaning up player: %s\n", e.what());
}
if(fileData) {
free(fileData);
fileData = NULL;