3 files changed, 111 insertions, 118 deletions

diff --git a/src/audio/oal/stream.cpp b/src/audio/oal/stream.cpp
index 68847906..8b627e2a 100644
--- a/src/audio/oal/stream.cpp
+++ b/src/audio/oal/stream.cpp
@@ -1018,42 +1018,23 @@ CStream::FlagAsToBeProcessed(bool close)
 	gAudioThreadCv.notify_one();
 }
 
-extern CStream *aStream[];
 void audioFileOpsThread()
 {
-	std::queue<CStream*> m_streamsToDelete;
-
 	do
 	{
 		CStream *stream;
 		{
 			// Just a semaphore
 			std::unique_lock<std::mutex> queueMutex(gAudioThreadQueueMutex);
-			gAudioThreadCv.wait(queueMutex, [m_streamsToDelete] { return gStreamsToProcess.size() > 0 || m_streamsToDelete.size() > 0 || gAudioThreadTerm; });
+			gAudioThreadCv.wait(queueMutex, [] { return gStreamsToProcess.size() > 0 || gAudioThreadTerm; });
 			if (gAudioThreadTerm)
 				return;
 
 			if (!gStreamsToProcess.empty()) {
 				stream = gStreamsToProcess.front();
 				gStreamsToProcess.pop();
-			} else {
-				// End of streams. Perform deleting streams
-				while(!m_streamsToDelete.empty()) {
-					CStream *stream = m_streamsToDelete.front();
-					m_streamsToDelete.pop();
-					if (stream->m_pSoundFile) {
-						delete stream->m_pSoundFile;
-						stream->m_pSoundFile = nil;
-					}
-	
-					if (stream->m_pBuffer) {
-						free(stream->m_pBuffer);
-						stream->m_pBuffer = nil;
-					}
-					delete stream;
-				}
+			} else
 				continue;
-			}
 		}
 
 		std::unique_lock<std::mutex> lock(stream->m_mutex);
@@ -1062,16 +1043,21 @@ void audioFileOpsThread()
 		bool insertBufsAfterCheck = false;
 
 		do {
-			if (stream->m_nDeleteMe == 1) {
-				m_streamsToDelete.push(stream);
-				stream->m_nDeleteMe = 2;
-				break;
-			} else if (stream->m_nDeleteMe == 2) {
-				break;
-			}
+			if (!stream->IsOpened()) {
+				// We MUST do that here, because we release mutex for m_pSoundFile->Seek() and m_pSoundFile->Decode() since they're costly
+				if (stream->m_pSoundFile) {
+					delete stream->m_pSoundFile;
+					stream->m_pSoundFile = nil;
+				}
 
-			if (!stream->IsOpened())
+				if (stream->m_pBuffer) {
+					free(stream->m_pBuffer);
+					stream->m_pBuffer = nil;
+				}
+				lock.unlock();
+				stream->m_closeCv.notify_one();
 				break;
+			}
 
 			if (stream->m_bReset)
 				break;
@@ -1152,14 +1138,14 @@ void CStream::Terminate()
 #endif
 }
 
-CStream::CStream(char *filename, ALuint *sources, ALuint (&buffers)[NUM_STREAMBUFFERS], uint32 overrideSampleRate) :
+CStream::CStream(ALuint *sources, ALuint (&buffers)[NUM_STREAMBUFFERS]) :
 	m_pAlSources(sources),
 	m_alBuffers(buffers),
 	m_pBuffer(nil),
 	m_bPaused(false),
 	m_bActive(false),
 #ifdef MULTITHREADED_AUDIO
-	m_nDeleteMe(false),
+	m_bIExist(false),
 	m_bDoSeek(false),
 	m_SeekPos(0),
 #endif
@@ -1171,6 +1157,31 @@ CStream::CStream(char *filename, ALuint *sources, ALuint (&buffers)[NUM_STREAMBU
 	m_nLoopCount(1)
 	
 {
+}
+
+bool CStream::Open(const char* filename, uint32 overrideSampleRate)
+{
+	if (IsOpened()) return false;
+
+#ifdef MULTITHREADED_AUDIO
+	std::unique_lock<std::mutex> lock(m_mutex);
+
+	CStream *stream = this;
+	// Wait for thread to close old one. We can't close it here, because the thread might be running Decode() or Seek(), while mutex is released
+	m_closeCv.wait(lock, [this] { return m_pSoundFile == nil && m_pBuffer == nil; });
+
+	m_bDoSeek = false;
+	m_SeekPos = 0;
+#endif
+
+	m_bPaused = false;
+	m_bActive = false;
+	m_bReset = false;
+	m_nVolume = 0;
+	m_nPan = 0;
+	m_nPosBeforeReset = 0;
+	m_nLoopCount = 1;
+
 // Be case-insensitive on linux (from https://github.com/OneSadCookie/fcaseopen/)
 #if !defined(_WIN32)
 	char *real = casepath(filename);
@@ -1205,7 +1216,7 @@ CStream::CStream(char *filename, ALuint *sources, ALuint (&buffers)[NUM_STREAMBU
 	else 
 		m_pSoundFile = nil;
 
-	if ( IsOpened() )
+	if ( m_pSoundFile && m_pSoundFile->IsOpened() )
 	{
 		uint32 bufSize = m_pSoundFile->GetBufferSize();
 		if(bufSize != 0) { // Otherwise it's deferred
@@ -1220,8 +1231,12 @@ CStream::CStream(char *filename, ALuint *sources, ALuint (&buffers)[NUM_STREAMBU
 			DEV("Buffer sec: %f\n",       (float(m_pSoundFile->GetBufferSamples()) / float(m_pSoundFile->GetChannels())/ float(m_pSoundFile->GetSampleRate())));
 			DEV("Length MS: %02d:%02d\n", (m_pSoundFile->GetLength() / 1000) / 60, (m_pSoundFile->GetLength() / 1000) % 60);
 		}
-		return;
+#ifdef MULTITHREADED_AUDIO
+		m_bIExist = true;
+#endif
+		return true;
 	}
+	return false;
 }
 
 CStream::~CStream()
@@ -1231,18 +1246,21 @@ CStream::~CStream()
 
 void CStream::Close()
 {
+	if(!IsOpened()) return;
+
 #ifdef MULTITHREADED_AUDIO
 	{
 		std::lock_guard<std::mutex> lock(m_mutex);
 
 		Stop();
 		ClearBuffers();
-		m_nDeleteMe = true;
-		// clearing buffer queues are not needed. after m_nDeleteMe set, this stream is ded 
+		m_bIExist = false;
+		// clearing buffer queues are not needed. after m_bIExist is cleared, this stream is ded 
 	}
 
 	FlagAsToBeProcessed(true);
 #else
+
 	Stop();
 	ClearBuffers();
 
@@ -1265,9 +1283,14 @@ bool CStream::HasSource()
 	return (m_pAlSources[0] != AL_NONE) && (m_pAlSources[1] != AL_NONE);
 }
 
+// m_bIExist only written in main thread, thus mutex is not needed on main thread
 bool CStream::IsOpened()
 {
+#ifdef MULTITHREADED_AUDIO
+	return m_bIExist;
+#else
 	return m_pSoundFile && m_pSoundFile->IsOpened();
+#endif
 }
 
 bool CStream::IsPlaying()
diff --git a/src/audio/oal/stream.h b/src/audio/oal/stream.h
index bdbf19e0..10b595c1 100644
--- a/src/audio/oal/stream.h
+++ b/src/audio/oal/stream.h
@@ -127,9 +127,10 @@ public:
 	std::mutex	m_mutex;
 	std::queue<std::pair<ALuint, ALuint>> m_fillBuffers; // left and right buffer
 	tsQueue<std::pair<ALuint, ALuint>> m_queueBuffers;
+	std::condition_variable m_closeCv;
 	bool     m_bDoSeek;
 	uint32   m_SeekPos;
-	uint8	 m_nDeleteMe; // 1: add to delete list 2: already on delete list
+	bool	 m_bIExist;
 #endif
 
 	void    *m_pBuffer;
@@ -163,8 +164,10 @@ public:
 	static void Initialise();
 	static void Terminate();
 	
-	CStream(char *filename, ALuint *sources, ALuint (&buffers)[NUM_STREAMBUFFERS], uint32 overrideSampleRate = 32000);
+	CStream(ALuint *sources, ALuint (&buffers)[NUM_STREAMBUFFERS]);
 	~CStream();
+	void   Delete();
+	bool   Open(const char *filename, uint32 overrideSampleRate = 32000);
 	void   Close();
 	
 	bool   IsOpened();
diff --git a/src/audio/sampman_oal.cpp b/src/audio/sampman_oal.cpp
index d546acf2..6c25cf79 100644
--- a/src/audio/sampman_oal.cpp
+++ b/src/audio/sampman_oal.cpp
@@ -39,6 +39,7 @@
 #ifdef MULTITHREADED_AUDIO
 #include <mutex>
 #include <queue>
+#include <condition_variable>
 #endif
 #include "oal/stream.h"
 
@@ -521,14 +522,10 @@ _FindMP3s(void)
 						continue;
 					}
 				}
-				aStream[0] = new CStream(filepath, ALStreamSources[0], ALStreamBuffers[0]);
-
-				if (aStream[0] && aStream[0]->IsOpened())
+				if (aStream[0] && aStream[0]->Open(filepath))
 				{
 					total_ms = aStream[0]->GetLengthMS();
 					aStream[0]->Close();
-					aStream[0] = NULL;
-
 					OutputDebugString(fd.cFileName);
 
 					_pMP3List = new tMP3Entry;
@@ -579,13 +576,10 @@ _FindMP3s(void)
 				else
 					bShortcut = FALSE;
 				
-				aStream[0] = new CStream(filepath, ALStreamSources[0], ALStreamBuffers[0]);
-
-				if (aStream[0] && aStream[0]->IsOpened())
+				if (aStream[0] && aStream[0]->Open(filepath))
 				{
 					total_ms = aStream[0]->GetLengthMS();
 					aStream[0]->Close();
-					aStream[0] = NULL;
 
 					pList->pNext = new tMP3Entry;
 					
@@ -739,6 +733,9 @@ cSampleManager::Initialise(void)
 
 	EFXInit();
 
+	for(int i = 0; i < MAX_STREAMS; i++)
+		aStream[i] = new CStream(ALStreamSources[i], ALStreamBuffers[i]);
+
 	CStream::Initialise();
 
 	{
@@ -892,14 +889,12 @@ cSampleManager::Initialise(void)
 		debug("Cannot load audio cache\n");
 #endif
 
-		for(int32 i = 0; i < TOTAL_STREAMED_SOUNDS; i++) {
-			aStream[0] = new CStream(StreamedNameTable[i], ALStreamSources[0], ALStreamBuffers[0], IsThisTrackAt16KHz(i) ? 16000 : 32000);
-
-			if(aStream[0] && aStream[0]->IsOpened()) {
+		for ( int32 i = 0; i < TOTAL_STREAMED_SOUNDS; i++ )
+		{	
+			if ( aStream[0] && aStream[0]->Open(StreamedNameTable[i], IsThisTrackAt16KHz(i) ? 16000 : 32000) )
+			{
 				uint32 tatalms = aStream[0]->GetLengthMS();
 				aStream[0]->Close();
-				aStream[0] = NULL;
-
 				nStreamLength[i] = tatalms;
 			} else
 				USERERROR("Can't open '%s'\n", StreamedNameTable[i]);
@@ -941,7 +936,8 @@ cSampleManager::Initialise(void)
 	{
 		for ( int32 i = 0; i < MAX_STREAMS; i++ )
 		{
-			aStream[i]       = NULL;
+			aStream[i]->Close();
+
 			nStreamVolume[i] = 100;
 			nStreamPan[i]    = 63;
 		}
@@ -1028,15 +1024,8 @@ void
 cSampleManager::Terminate(void)
 {
 	for (int32 i = 0; i < MAX_STREAMS; i++)
-	{
-		CStream *stream = aStream[i];
-		if (stream)
-		{
-			stream->Close();
-			aStream[i] = NULL;
-		}
-	}
-	
+		aStream[i]->Close();
+
 	for ( int32 i = 0; i < NUM_CHANNELS; i++ )
 		aChannel[i].Term();
 	
@@ -1086,6 +1075,9 @@ cSampleManager::Terminate(void)
 
 	CStream::Terminate();
 
+	for(int32 i = 0; i < MAX_STREAMS; i++)
+		delete aStream[i];
+
 	if ( nSampleBankMemoryStartAddress[SFX_BANK_0] != 0 )
 	{
 		free((void *)nSampleBankMemoryStartAddress[SFX_BANK_0]);
@@ -1612,22 +1604,16 @@ cSampleManager::PreloadStreamedFile(uint8 nFile, uint8 nStream)
 
 	if ( nFile < TOTAL_STREAMED_SOUNDS )
 	{
-		if ( aStream[nStream] )
-		{
-			aStream[nStream]->Close();
-			aStream[nStream] = NULL;
-		}
-		
+		CStream *stream = aStream[nStream];
+
+		stream->Close();
+
 		strcpy(filename, StreamedNameTable[nFile]);
 		
-		CStream *stream = new CStream(filename, ALStreamSources[nStream], ALStreamBuffers[nStream], IsThisTrackAt16KHz(nFile) ? 16000 : 32000);
-		ASSERT(stream != NULL);
-		
-		aStream[nStream] = stream;
+		stream->Open(filename, IsThisTrackAt16KHz(nFile) ? 16000 : 32000);
 		if ( !stream->Setup() )
 		{
 			stream->Close();
-			aStream[nStream] = NULL;
 		}
 	}
 }
@@ -1639,7 +1625,7 @@ cSampleManager::PauseStream(bool8 nPauseFlag, uint8 nStream)
 	
 	CStream *stream = aStream[nStream];
 	
-	if ( stream )
+	if ( stream->IsOpened() )
 	{
 		stream->SetPause(nPauseFlag != FALSE);
 	}
@@ -1652,12 +1638,9 @@ cSampleManager::StartPreloadedStreamedFile(uint8 nStream)
 	
 	CStream *stream = aStream[nStream];
 	
-	if ( stream )
+	if ( stream->IsOpened() )
 	{
-		if ( stream->IsOpened() )
-		{
-			stream->Start();
-		}
+		stream->Start();
 	}
 }
 
@@ -1671,11 +1654,8 @@ cSampleManager::StartStreamedFile(uint8 nFile, uint32 nPos, uint8 nStream)
 	if ( nFile >= TOTAL_STREAMED_SOUNDS )
 		return FALSE;
 
-	if ( aStream[nStream] )
-	{
-		aStream[nStream]->Close();
-		aStream[nStream] = NULL;
-	}
+	aStream[nStream]->Close();
+
 	if ( nFile == STREAMED_SOUND_RADIO_MP3_PLAYER )
 	{
 		do
@@ -1691,12 +1671,10 @@ cSampleManager::StartStreamedFile(uint8 nFile, uint32 nPos, uint8 nStream)
 				if(!_GetMP3PosFromStreamPos(&position, &e) && !e) {
 					nFile = 0;
 					strcpy(filename, StreamedNameTable[nFile]);
-					
-					CStream* stream = new CStream(filename, ALStreamSources[nStream], ALStreamBuffers[nStream], IsThisTrackAt16KHz(nFile) ? 16000 : 32000);
 
-					aStream[nStream] = stream;
-
-					if (stream->Setup()) {
+					CStream *stream = aStream[nStream];
+					stream->Open(filename, IsThisTrackAt16KHz(nFile) ? 16000 : 32000);
+					if ( stream->Setup() ) {
 						if (position != 0)
 							stream->SetPosMS(position);
 
@@ -1705,18 +1683,17 @@ cSampleManager::StartStreamedFile(uint8 nFile, uint32 nPos, uint8 nStream)
 						return TRUE;
 					} else {
 						stream->Close();
-						aStream[nStream] = NULL;
 					}
 					return FALSE;
 
 				} else {
-					if ( e->pLinkPath != NULL )
-						aStream[nStream] = new CStream(e->pLinkPath, ALStreamSources[nStream], ALStreamBuffers[nStream], IsThisTrackAt16KHz(nFile) ? 16000 : 32000);
+					if (e->pLinkPath != NULL)
+						aStream[nStream]->Open(e->pLinkPath, IsThisTrackAt16KHz(nFile) ? 16000 : 32000);
 					else {
 						strcpy(filename, _mp3DirectoryPath);
 						strcat(filename, e->aFilename);
-					
-						aStream[nStream] = new CStream(filename, ALStreamSources[nStream], ALStreamBuffers[nStream]);
+
+						aStream[nStream]->Open(filename);
 					}
 					
 					if (aStream[nStream]->Setup()) {
@@ -1729,7 +1706,6 @@ cSampleManager::StartStreamedFile(uint8 nFile, uint32 nPos, uint8 nStream)
 						return TRUE;
 					} else {
 						aStream[nStream]->Close();
-						aStream[nStream] = NULL;
 					}
 					// fall through, start playing from another song
 				}
@@ -1748,9 +1724,8 @@ cSampleManager::StartStreamedFile(uint8 nFile, uint32 nPos, uint8 nStream)
 						_bIsMp3Active = 0;
 						strcpy(filename, StreamedNameTable[nFile]);
 
-						CStream* stream = new CStream(filename, ALStreamSources[nStream], ALStreamBuffers[nStream], IsThisTrackAt16KHz(nFile) ? 16000 : 32000);
-
-						aStream[nStream] = stream;
+						CStream* stream = aStream[nStream];
+						stream->Open(filename, IsThisTrackAt16KHz(nFile) ? 16000 : 32000);
 
 						if (stream->Setup()) {
 							if (position != 0)
@@ -1761,18 +1736,16 @@ cSampleManager::StartStreamedFile(uint8 nFile, uint32 nPos, uint8 nStream)
 							return TRUE;
 						} else {
 							stream->Close();
-							aStream[nStream] = NULL;
 						}
 						return FALSE;
 					}
 				}
-				if(mp3->pLinkPath != NULL)
-					aStream[nStream] = new CStream(mp3->pLinkPath, ALStreamSources[nStream], ALStreamBuffers[nStream], IsThisTrackAt16KHz(nFile) ? 16000 : 32000);
+				if (mp3->pLinkPath != NULL)
+					aStream[nStream]->Open(mp3->pLinkPath, IsThisTrackAt16KHz(nFile) ? 16000 : 32000);
 				else {
 					strcpy(filename, _mp3DirectoryPath);
 					strcat(filename, mp3->aFilename);
-
-					aStream[nStream] = new CStream(filename, ALStreamSources[nStream], ALStreamBuffers[nStream]);
+					aStream[nStream]->Open(filename, IsThisTrackAt16KHz(nFile) ? 16000 : 32000);
 				}
 
 				if (aStream[nStream]->Setup()) {
@@ -1783,7 +1756,6 @@ cSampleManager::StartStreamedFile(uint8 nFile, uint32 nPos, uint8 nStream)
 					return TRUE;
 				} else {
 					aStream[nStream]->Close();
-					aStream[nStream] = NULL;
 				}
 
 			}
@@ -1795,9 +1767,9 @@ cSampleManager::StartStreamedFile(uint8 nFile, uint32 nPos, uint8 nStream)
 	}
 	strcpy(filename, StreamedNameTable[nFile]);
 	
-	CStream *stream = new CStream(filename, ALStreamSources[nStream], ALStreamBuffers[nStream], IsThisTrackAt16KHz(nFile) ? 16000 : 32000);
+	CStream *stream = aStream[nStream];
 
-	aStream[nStream] = stream;
+	aStream[nStream]->Open(filename, IsThisTrackAt16KHz(nFile) ? 16000 : 32000);
 	
 	if ( stream->Setup() ) {
 		if (position != 0)
@@ -1808,7 +1780,6 @@ cSampleManager::StartStreamedFile(uint8 nFile, uint32 nPos, uint8 nStream)
 		return TRUE;
 	} else {
 		stream->Close();
-		aStream[nStream] = NULL;
 	}
 	return FALSE;
 }
@@ -1820,14 +1791,10 @@ cSampleManager::StopStreamedFile(uint8 nStream)
 
 	CStream *stream = aStream[nStream];
 	
-	if ( stream )
-	{
-		stream->Close();
-		aStream[nStream] = NULL;
+	stream->Close();
 
-		if ( nStream == 0 )
-			_bIsMp3Active = FALSE;
-	}
+	if ( nStream == 0 )
+		_bIsMp3Active = FALSE;
 }
 
 int32
@@ -1837,7 +1804,7 @@ cSampleManager::GetStreamedFilePosition(uint8 nStream)
 	
 	CStream *stream = aStream[nStream];
 	
-	if ( stream )
+	if ( stream->IsOpened() )
 	{
 		if ( _bIsMp3Active )
 		{
@@ -1875,7 +1842,7 @@ cSampleManager::SetStreamedVolumeAndPan(uint8 nVolume, uint8 nPan, uint8 nEffect
 	
 	CStream *stream = aStream[nStream];
 	
-	if ( stream )
+	if ( stream->IsOpened() )
 	{
 		if ( nEffectFlag )
 			stream->SetVolume(m_nEffectsFadeVolume*nVolume*m_nEffectsVolume >> 14);
@@ -1901,7 +1868,7 @@ cSampleManager::IsStreamPlaying(uint8 nStream)
 	
 	CStream *stream = aStream[nStream];
 	
-	if ( stream )
+	if ( stream->IsOpened() )
 	{
 		if ( stream->IsPlaying() )
 			return TRUE;
@@ -1917,7 +1884,7 @@ cSampleManager::Service(void)
 	{
 		CStream *stream = aStream[i];
 		
-		if ( stream )
+		if ( stream->IsOpened() )
 			stream->Update();
 	}
 	int refCount = CChannel::channelsThatNeedService;