[picodrive.git] / platform / uiq3 / engine / audio_mediaserver.cpp

/*******************************************************************\r
 *\r
 *	File:		Audio_mediaserver.cpp\r
 *\r
 *	Author:		Peter van Sebille (peter@yipton.net)\r
 *\r
 *  Modified/adapted for picodriveN by notaz, 2006\r
 *\r
 *  (c) Copyright 2006, notaz\r
 *	(c) Copyright 2001, Peter van Sebille\r
 *	All Rights Reserved\r
 *\r
 *******************************************************************/\r
\r
#include "audio_mediaserver.h"\r
#include "debug.h"\r
\r
//#define DEBUG_UNDERFLOWS\r
//#undef DEBUGPRINT\r
//#define DEBUGPRINT(x...)\r
\r
\r
const TInt KUpdatesPerSec = 10;\r
const TInt KBlockTime = 1000000 / KUpdatesPerSec;\r
const TInt KMaxLag = 200000; // max sound lag, lower values increase chance of underflow\r
const TInt KMaxUnderflows = 50; // max underflows/API errors we are going allow in a row (to prevent lockups)\r
\r
\r
/*******************************************\r
 *\r
 * CGameAudioMS\r
 *\r
 *******************************************/\r
\r
CGameAudioMS::CGameAudioMS(TInt aRate, TBool aStereo, TInt aWritesPerSec, TInt aVolume)\r
: iRate(aRate), iStereo(aStereo), iWritesPerSec(aWritesPerSec), iVolume(aVolume)\r
{\r
}\r
\r
\r
CGameAudioMS* CGameAudioMS::NewL(TInt aRate, TBool aStereo, TInt aWritesPerSec, TInt aVolume)\r
{\r
	DEBUGPRINT(_L("CGameAudioMS::NewL(%i, %i, %i, %i)"), aRate, aStereo, aWritesPerSec, aVolume);\r
	CGameAudioMS*		self = new(ELeave) CGameAudioMS(aRate, aStereo, aWritesPerSec, aVolume);\r
	CleanupStack::PushL(self);\r
	self->ConstructL();\r
	CleanupStack::Pop();		// self\r
	return self;\r
}\r
\r
\r
CGameAudioMS::~CGameAudioMS()\r
{\r
	DEBUGPRINT(_L("CGameAudioMS::~CGameAudioMS()"));\r
	if(iMdaAudioOutputStream) {\r
		iScheduler->Schedule(); // let it finish it's stuff\r
		iMdaAudioOutputStream->Stop();\r
		delete iMdaAudioOutputStream;\r
	}\r
	if(iServer) delete iServer;\r
\r
	for (TInt i=0; i<KSoundBuffers; i++)\r
		delete iSoundBuffers[i];\r
\r
	// Polled AS\r
	//if(iScheduler) delete iScheduler;\r
}\r
\r
\r
void CGameAudioMS::ConstructL()\r
{\r
	iServer = CMdaServer::NewL();\r
\r
	// iScheduler = CPolledActiveScheduler::NewL();\r
	iScheduler = CPolledActiveScheduler::Instance();\r
\r
	switch(iRate) {\r
		case 11025: iMdaAudioDataSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate11025Hz; break;\r
		case 16000: iMdaAudioDataSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate16000Hz; break;\r
		case 22050: iMdaAudioDataSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate22050Hz; break;\r
		case 44100: iMdaAudioDataSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate44100Hz; break;\r
		default:    iMdaAudioDataSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate8000Hz;  break;\r
	}\r
\r
	iMdaAudioDataSettings.iChannels   = (iStereo) ? TMdaAudioDataSettings::EChannelsStereo : TMdaAudioDataSettings::EChannelsMono;\r
	iMdaAudioDataSettings.iCaps       = TMdaAudioDataSettings::ESampleRateFixed | iMdaAudioDataSettings.iSampleRate;\r
	iMdaAudioDataSettings.iFlags      = TMdaAudioDataSettings::ENoNetworkRouting;\r
\r
	iMaxWriteSamples = iRate / iWritesPerSec;\r
	if (iRate % iWritesPerSec)\r
		iMaxWriteSamples++;\r
	int bufferedFrames = iWritesPerSec / KUpdatesPerSec;\r
\r
	iBufferSize = iMaxWriteSamples * (iStereo ? 4 : 2);\r
	iBufferSize *= bufferedFrames;\r
	for (TInt i=0 ; i<KSoundBuffers ; i++)\r
	{\r
		// it seems .SetLength(max) throws USER:23 panic,\r
		// so make them a bit larger\r
		iSoundBuffers[i] = HBufC8::NewL(iBufferSize+4);\r
		iSoundBuffers[i]->Des().FillZ  (iBufferSize+4);\r
	}\r
\r
	iCurrentBuffer = 0;\r
	iCurrentBufferSize = 0;\r
\r
	DEBUGPRINT(_L("sound: iMaxWriteSamples: %i, iBufferSize: %i"), iMaxWriteSamples, iBufferSize);\r
\r
	// here we actually test if we can create and open CMdaAudioOutputStream at all, but really create and use it later.\r
	iMdaAudioOutputStream = CMdaAudioOutputStream::NewL(iListener, iServer);\r
	if (iMdaAudioOutputStream) {\r
		if (iVolume < 0 || iVolume > iMdaAudioOutputStream->MaxVolume())\r
			iVolume = iMdaAudioOutputStream->MaxVolume();\r
		delete iMdaAudioOutputStream;\r
		iMdaAudioOutputStream = 0;\r
	}\r
}\r
\r
// returns a pointer to buffer for next frame,\r
// to be used when iSoundBuffers are used directly\r
TInt16 *CGameAudioMS::NextFrameL(TInt aPcmFrames)\r
{\r
	TInt mul = iStereo ? 4 : 2;\r
	TInt bytes = aPcmFrames * mul;\r
	iCurrentPosition   += bytes / 2;\r
	iCurrentBufferSize += bytes;\r
\r
	if (aPcmFrames > iMaxWriteSamples) {\r
		DEBUGPRINT(_L("too many samples: %i > %i"), aPcmFrames, iMaxWriteSamples);\r
	}\r
\r
	if (iCurrentBufferSize + iMaxWriteSamples * mul > iBufferSize)\r
	{\r
		//DEBUGPRINT(_L("write on iCurrentBufferSize %i"), iCurrentBufferSize);\r
		WriteBlockL();\r
	}\r
\r
	iScheduler->Schedule();\r
\r
	if(iListener.iUnderflowed) {\r
		if(iListener.iUnderflowed > KMaxUnderflows) {\r
			delete iMdaAudioOutputStream;\r
			iMdaAudioOutputStream = 0;\r
			return 0;\r
		}\r
		UnderflowedL(); // not again!\r
	}\r
\r
	return iCurrentPosition;\r
}\r
\r
void CGameAudioMS::WriteBlockL()\r
{\r
	iScheduler->Schedule();\r
	// do not write until stream is open\r
	if(!iListener.iIsOpen) WaitForOpenToCompleteL();\r
	//if(!iListener.iHasCopied) WaitForCopyToCompleteL(); // almost never happens anyway and sometimes even deadlocks?\r
	//iListener.iHasCopied = EFalse;\r
	\r
\r
	if(!iListener.iUnderflowed) {\r
		TInt64 delta;\r
		// don't write if sound is lagging too much\r
		delta = iTime - iMdaAudioOutputStream->Position().Int64();\r
		if (delta > MAKE_TINT64(0, KMaxLag))\r
			// another query sometimes returns very different result\r
			delta = iTime - iMdaAudioOutputStream->Position().Int64();\r
\r
		if(delta <= MAKE_TINT64(0, KMaxLag)) {\r
			//RDebug::Print(_L("delta: %i"), iTime.Low() - iMdaAudioOutputStream->Position().Int64().Low());\r
			iSoundBuffers[iCurrentBuffer]->Des().SetLength(iCurrentBufferSize);\r
			iMdaAudioOutputStream->WriteL(*iSoundBuffers[iCurrentBuffer]);\r
			iTime += KBlockTime;\r
		} else {\r
			DEBUGPRINT(_L("lag: %i"), I64LOW(delta));\r
		}\r
	}\r
\r
	if (++iCurrentBuffer == KSoundBuffers)\r
		iCurrentBuffer = 0;\r
	iSoundBuffers[iCurrentBuffer]->Des().SetMax();\r
	iCurrentPosition = (TInt16*) iSoundBuffers[iCurrentBuffer]->Ptr();\r
	iCurrentBufferSize = 0;\r
}\r
\r
void CGameAudioMS::Pause()\r
{\r
	if(!iMdaAudioOutputStream) return;\r
\r
	iScheduler->Schedule(); // let it finish it's stuff\r
	iMdaAudioOutputStream->Stop();\r
	delete iMdaAudioOutputStream;\r
	iMdaAudioOutputStream = 0;\r
}\r
\r
// call this before doing any playback!\r
TInt16 *CGameAudioMS::ResumeL()\r
{\r
	DEBUGPRINT(_L("CGameAudioMS::Resume()"));\r
	iScheduler->Schedule();\r
\r
	// we act a bit strange here: simulate buffer underflow, which actually starts audio\r
	iListener.iIsOpen = ETrue;\r
	iListener.iUnderflowed = 1;\r
	iListener.iLastError = 0;\r
	iCurrentBufferSize = 0;\r
	iCurrentPosition = (TInt16*) iSoundBuffers[iCurrentBuffer]->Ptr();\r
	return iCurrentPosition;\r
}\r
\r
// handles underflow condition\r
void CGameAudioMS::UnderflowedL()\r
{\r
#ifdef DEBUG_UNDERFLOWS\r
	DEBUGPRINT(_L("UnderflowedL()"));\r
#endif\r
\r
	if (iListener.iLastError != KErrUnderflow)\r
	{\r
		// recreate the stream\r
		//iMdaAudioOutputStream->Stop();\r
		if(iMdaAudioOutputStream) delete iMdaAudioOutputStream;\r
		iMdaAudioOutputStream = CMdaAudioOutputStream::NewL(iListener, iServer);\r
		iMdaAudioOutputStream->Open(&iMdaAudioDataSettings);\r
		iMdaAudioOutputStream->SetAudioPropertiesL(iMdaAudioDataSettings.iSampleRate, iMdaAudioDataSettings.iChannels);\r
		iMdaAudioOutputStream->SetVolume(iVolume); // new in UIQ3\r
\r
		iListener.iIsOpen = EFalse;   // wait for it to open\r
		//iListener.iHasCopied = ETrue; // but don't wait for last copy to complete\r
		// let it open and feed some stuff to make it happy\r
		User::After(0);\r
		iScheduler->Schedule();\r
		iListener.iLastError = 0;\r
		if(!iListener.iIsOpen) WaitForOpenToCompleteL();\r
	} else {\r
		iListener.iLastError = iListener.iUnderflowed = 0;\r
	}\r
	iTime = iMdaAudioOutputStream->Position().Int64();\r
}\r
\r
void CGameAudioMS::WaitForOpenToCompleteL()\r
{\r
	DEBUGPRINT(_L("CGameAudioMS::WaitForOpenToCompleteL"));\r
	TInt	count = 20;		// 2 seconds\r
	TInt	waitPeriod = 100 * 1000;\r
\r
	if(!iListener.iIsOpen) {\r
		// it is often enough to do this\r
		User::After(0);\r
		iScheduler->Schedule();\r
	}\r
	while (!iListener.iIsOpen && --count)\r
	{\r
		User::After(waitPeriod);\r
		iScheduler->Schedule();\r
	}\r
	if (!iListener.iIsOpen)\r
		User::LeaveIfError(KErrNotSupported);\r
}\r
\r
TInt CGameAudioMS::ChangeVolume(TInt aUp)\r
{\r
	//DEBUGPRINT(_L("CGameAudioMS::ChangeVolume(%i)"), aUp);\r
\r
	if (iMdaAudioOutputStream) {\r
		if (aUp) {\r
			iVolume += 5;\r
			if (iVolume > iMdaAudioOutputStream->MaxVolume())\r
				iVolume = iMdaAudioOutputStream->MaxVolume();\r
		} else {\r
			iVolume -= 5;\r
			if (iVolume < 0) iVolume = 0;\r
		}\r
		iMdaAudioOutputStream->SetVolume(iVolume);\r
	}\r
\r
	return iVolume;\r
}\r
\r
void TGameAudioEventListener::MaoscOpenComplete(TInt aError)\r
{\r
#ifdef DEBUG_UNDERFLOWS\r
	DEBUGPRINT(_L("CGameAudioMS::MaoscOpenComplete, error=%d"), aError);\r
#endif\r
\r
	iIsOpen = ETrue;\r
	if(aError) {\r
		iLastError = aError;\r
		iUnderflowed++;\r
	}\r
	else iUnderflowed = 0;\r
}\r
\r
void TGameAudioEventListener::MaoscBufferCopied(TInt aError, const TDesC8& aBuffer)\r
{\r
	if (aError)\r
		DEBUGPRINT(_L("CGameAudioMS::MaoscBufferCopied, error=%d"), aError);\r
\r
//	iHasCopied = ETrue;\r
\r
	if(aError) { // shit!\r
		iLastError = aError;\r
		iUnderflowed++;\r
	}\r
}\r
\r
void TGameAudioEventListener::MaoscPlayComplete(TInt aError)\r
{\r
#ifdef DEBUG_UNDERFLOWS\r
	DEBUGPRINT(_L("CGameAudioMS::MaoscPlayComplete: %i"), aError);\r
#endif\r
	if(aError) {\r
		iLastError = aError;\r
		iUnderflowed++; // never happened to me while testing, but just in case\r
	}\r
}\r
\r
Commit	Line	Data
cc68a136	1	/*******************************************************************\r
	2	*\r
	3	* File: Audio_mediaserver.cpp\r
	4	*\r
	5	* Author: Peter van Sebille (peter@yipton.net)\r
	6	*\r
	7	* Modified/adapted for picodriveN by notaz, 2006\r
	8	*\r
	9	* (c) Copyright 2006, notaz\r
	10	* (c) Copyright 2001, Peter van Sebille\r
	11	* All Rights Reserved\r
	12	*\r
	13	*******************************************************************/\r
	14	\r
	15	#include "audio_mediaserver.h"\r
	16	#include "debug.h"\r
	17	\r
ca482e5d	18	//#define DEBUG_UNDERFLOWS\r
cc68a136	19	//#undef DEBUGPRINT\r
	20	//#define DEBUGPRINT(x...)\r
	21	\r
	22	\r
	23	const TInt KUpdatesPerSec = 10;\r
	24	const TInt KBlockTime = 1000000 / KUpdatesPerSec;\r
	25	const TInt KMaxLag = 200000; // max sound lag, lower values increase chance of underflow\r
	26	const TInt KMaxUnderflows = 50; // max underflows/API errors we are going allow in a row (to prevent lockups)\r
	27	\r
	28	\r
	29	/*******************************************\r
	30	*\r
	31	* CGameAudioMS\r
	32	*\r
	33	*******************************************/\r
	34	\r
ca482e5d	35	CGameAudioMS::CGameAudioMS(TInt aRate, TBool aStereo, TInt aWritesPerSec, TInt aVolume)\r
ca482e5d	36	: iRate(aRate), iStereo(aStereo), iWritesPerSec(aWritesPerSec), iVolume(aVolume)\r
cc68a136	37	{\r
	38	}\r
	39	\r
	40	\r
ca482e5d	41	CGameAudioMS* CGameAudioMS::NewL(TInt aRate, TBool aStereo, TInt aWritesPerSec, TInt aVolume)\r
cc68a136	42	{\r
ca482e5d	43	DEBUGPRINT(_L("CGameAudioMS::NewL(%i, %i, %i, %i)"), aRate, aStereo, aWritesPerSec, aVolume);\r
ca482e5d	44	CGameAudioMS* self = new(ELeave) CGameAudioMS(aRate, aStereo, aWritesPerSec, aVolume);\r
cc68a136	45	CleanupStack::PushL(self);\r
	46	self->ConstructL();\r
	47	CleanupStack::Pop(); // self\r
	48	return self;\r
	49	}\r
	50	\r
	51	\r
	52	CGameAudioMS::~CGameAudioMS()\r
	53	{\r
	54	DEBUGPRINT(_L("CGameAudioMS::~CGameAudioMS()"));\r
	55	if(iMdaAudioOutputStream) {\r
	56	iScheduler->Schedule(); // let it finish it's stuff\r
	57	iMdaAudioOutputStream->Stop();\r
	58	delete iMdaAudioOutputStream;\r
	59	}\r
	60	if(iServer) delete iServer;\r
	61	\r
	62	for (TInt i=0; i<KSoundBuffers; i++)\r
	63	delete iSoundBuffers[i];\r
	64	\r
	65	// Polled AS\r
	66	//if(iScheduler) delete iScheduler;\r
	67	}\r
	68	\r
	69	\r
	70	void CGameAudioMS::ConstructL()\r
	71	{\r
	72	iServer = CMdaServer::NewL();\r
	73	\r
	74	// iScheduler = CPolledActiveScheduler::NewL();\r
	75	iScheduler = CPolledActiveScheduler::Instance();\r
	76	\r
	77	switch(iRate) {\r
	78	case 11025: iMdaAudioDataSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate11025Hz; break;\r
	79	case 16000: iMdaAudioDataSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate16000Hz; break;\r
	80	case 22050: iMdaAudioDataSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate22050Hz; break;\r
	81	case 44100: iMdaAudioDataSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate44100Hz; break;\r
	82	default: iMdaAudioDataSettings.iSampleRate = TMdaAudioDataSettings::ESampleRate8000Hz; break;\r
	83	}\r
	84	\r
	85	iMdaAudioDataSettings.iChannels = (iStereo) ? TMdaAudioDataSettings::EChannelsStereo : TMdaAudioDataSettings::EChannelsMono;\r
	86	iMdaAudioDataSettings.iCaps = TMdaAudioDataSettings::ESampleRateFixed \| iMdaAudioDataSettings.iSampleRate;\r
	87	iMdaAudioDataSettings.iFlags = TMdaAudioDataSettings::ENoNetworkRouting;\r
	88	\r
ca482e5d	89	iMaxWriteSamples = iRate / iWritesPerSec;\r
	90	if (iRate % iWritesPerSec)\r
	91	iMaxWriteSamples++;\r
	92	int bufferedFrames = iWritesPerSec / KUpdatesPerSec;\r
cc68a136	93	\r
ca482e5d	94	iBufferSize = iMaxWriteSamples * (iStereo ? 4 : 2);\r
ca482e5d	95	iBufferSize *= bufferedFrames;\r
cc68a136	96	for (TInt i=0 ; i<KSoundBuffers ; i++)\r
cc68a136	97	{\r
6a13ef3f	98	// it seems .SetLength(max) throws USER:23 panic,\r
	99	// so make them a bit larger\r
	100	iSoundBuffers[i] = HBufC8::NewL(iBufferSize+4);\r
	101	iSoundBuffers[i]->Des().FillZ (iBufferSize+4);\r
cc68a136	102	}\r
	103	\r
	104	iCurrentBuffer = 0;\r
	105	iCurrentBufferSize = 0;\r
	106	\r
ca482e5d	107	DEBUGPRINT(_L("sound: iMaxWriteSamples: %i, iBufferSize: %i"), iMaxWriteSamples, iBufferSize);\r
ca482e5d	108	\r
cc68a136	109	// here we actually test if we can create and open CMdaAudioOutputStream at all, but really create and use it later.\r
cc68a136	110	iMdaAudioOutputStream = CMdaAudioOutputStream::NewL(iListener, iServer);\r
ca482e5d	111	if (iMdaAudioOutputStream) {\r
	112	if (iVolume < 0 \|\| iVolume > iMdaAudioOutputStream->MaxVolume())\r
	113	iVolume = iMdaAudioOutputStream->MaxVolume();\r
cc68a136	114	delete iMdaAudioOutputStream;\r
	115	iMdaAudioOutputStream = 0;\r
	116	}\r
	117	}\r
	118	\r
	119	// returns a pointer to buffer for next frame,\r
	120	// to be used when iSoundBuffers are used directly\r
	121	TInt16 *CGameAudioMS::NextFrameL(TInt aPcmFrames)\r
	122	{\r
ca482e5d	123	TInt mul = iStereo ? 4 : 2;\r
	124	TInt bytes = aPcmFrames * mul;\r
	125	iCurrentPosition += bytes / 2;\r
	126	iCurrentBufferSize += bytes;\r
cc68a136	127	\r
ca482e5d	128	if (aPcmFrames > iMaxWriteSamples) {\r
	129	DEBUGPRINT(_L("too many samples: %i > %i"), aPcmFrames, iMaxWriteSamples);\r
	130	}\r
	131	\r
	132	if (iCurrentBufferSize + iMaxWriteSamples * mul > iBufferSize)\r
cc68a136	133	{\r
ca482e5d	134	//DEBUGPRINT(_L("write on iCurrentBufferSize %i"), iCurrentBufferSize);\r
cc68a136	135	WriteBlockL();\r
	136	}\r
	137	\r
	138	iScheduler->Schedule();\r
	139	\r
	140	if(iListener.iUnderflowed) {\r
	141	if(iListener.iUnderflowed > KMaxUnderflows) {\r
	142	delete iMdaAudioOutputStream;\r
	143	iMdaAudioOutputStream = 0;\r
	144	return 0;\r
	145	}\r
	146	UnderflowedL(); // not again!\r
	147	}\r
	148	\r
	149	return iCurrentPosition;\r
	150	}\r
	151	\r
	152	void CGameAudioMS::WriteBlockL()\r
	153	{\r
	154	iScheduler->Schedule();\r
	155	// do not write until stream is open\r
	156	if(!iListener.iIsOpen) WaitForOpenToCompleteL();\r
	157	//if(!iListener.iHasCopied) WaitForCopyToCompleteL(); // almost never happens anyway and sometimes even deadlocks?\r
	158	//iListener.iHasCopied = EFalse;\r
	159	\r
	160	\r
	161	if(!iListener.iUnderflowed) {\r
	162	TInt64 delta;\r
	163	// don't write if sound is lagging too much\r
	164	delta = iTime - iMdaAudioOutputStream->Position().Int64();\r
	165	if (delta > MAKE_TINT64(0, KMaxLag))\r
	166	// another query sometimes returns very different result\r
	167	delta = iTime - iMdaAudioOutputStream->Position().Int64();\r
	168	\r
	169	if(delta <= MAKE_TINT64(0, KMaxLag)) {\r
	170	//RDebug::Print(_L("delta: %i"), iTime.Low() - iMdaAudioOutputStream->Position().Int64().Low());\r
	171	iSoundBuffers[iCurrentBuffer]->Des().SetLength(iCurrentBufferSize);\r
	172	iMdaAudioOutputStream->WriteL(*iSoundBuffers[iCurrentBuffer]);\r
	173	iTime += KBlockTime;\r
	174	} else {\r
	175	DEBUGPRINT(_L("lag: %i"), I64LOW(delta));\r
	176	}\r
	177	}\r
	178	\r
cc68a136	179	if (++iCurrentBuffer == KSoundBuffers)\r
cc68a136	180	iCurrentBuffer = 0;\r
ca482e5d	181	iSoundBuffers[iCurrentBuffer]->Des().SetMax();\r
cc68a136	182	iCurrentPosition = (TInt16*) iSoundBuffers[iCurrentBuffer]->Ptr();\r
	183	iCurrentBufferSize = 0;\r
	184	}\r
	185	\r
	186	void CGameAudioMS::Pause()\r
	187	{\r
	188	if(!iMdaAudioOutputStream) return;\r
	189	\r
	190	iScheduler->Schedule(); // let it finish it's stuff\r
	191	iMdaAudioOutputStream->Stop();\r
	192	delete iMdaAudioOutputStream;\r
	193	iMdaAudioOutputStream = 0;\r
	194	}\r
	195	\r
	196	// call this before doing any playback!\r
	197	TInt16 *CGameAudioMS::ResumeL()\r
	198	{\r
	199	DEBUGPRINT(_L("CGameAudioMS::Resume()"));\r
	200	iScheduler->Schedule();\r
	201	\r
	202	// we act a bit strange here: simulate buffer underflow, which actually starts audio\r
	203	iListener.iIsOpen = ETrue;\r
	204	iListener.iUnderflowed = 1;\r
	205	iListener.iLastError = 0;\r
cc68a136	206	iCurrentBufferSize = 0;\r
	207	iCurrentPosition = (TInt16*) iSoundBuffers[iCurrentBuffer]->Ptr();\r
	208	return iCurrentPosition;\r
	209	}\r
	210	\r
	211	// handles underflow condition\r
	212	void CGameAudioMS::UnderflowedL()\r
	213	{\r
ca482e5d	214	#ifdef DEBUG_UNDERFLOWS\r
cc68a136	215	DEBUGPRINT(_L("UnderflowedL()"));\r
ca482e5d	216	#endif\r
cc68a136	217	\r
	218	if (iListener.iLastError != KErrUnderflow)\r
	219	{\r
	220	// recreate the stream\r
	221	//iMdaAudioOutputStream->Stop();\r
	222	if(iMdaAudioOutputStream) delete iMdaAudioOutputStream;\r
	223	iMdaAudioOutputStream = CMdaAudioOutputStream::NewL(iListener, iServer);\r
	224	iMdaAudioOutputStream->Open(&iMdaAudioDataSettings);\r
	225	iMdaAudioOutputStream->SetAudioPropertiesL(iMdaAudioDataSettings.iSampleRate, iMdaAudioDataSettings.iChannels);\r
	226	iMdaAudioOutputStream->SetVolume(iVolume); // new in UIQ3\r
	227	\r
	228	iListener.iIsOpen = EFalse; // wait for it to open\r
	229	//iListener.iHasCopied = ETrue; // but don't wait for last copy to complete\r
	230	// let it open and feed some stuff to make it happy\r
	231	User::After(0);\r
	232	iScheduler->Schedule();\r
	233	iListener.iLastError = 0;\r
	234	if(!iListener.iIsOpen) WaitForOpenToCompleteL();\r
	235	} else {\r
	236	iListener.iLastError = iListener.iUnderflowed = 0;\r
	237	}\r
	238	iTime = iMdaAudioOutputStream->Position().Int64();\r
	239	}\r
	240	\r
	241	void CGameAudioMS::WaitForOpenToCompleteL()\r
	242	{\r
	243	DEBUGPRINT(_L("CGameAudioMS::WaitForOpenToCompleteL"));\r
	244	TInt count = 20; // 2 seconds\r
	245	TInt waitPeriod = 100 * 1000;\r
	246	\r
	247	if(!iListener.iIsOpen) {\r
	248	// it is often enough to do this\r
	249	User::After(0);\r
	250	iScheduler->Schedule();\r
	251	}\r
	252	while (!iListener.iIsOpen && --count)\r
	253	{\r
	254	User::After(waitPeriod);\r
	255	iScheduler->Schedule();\r
	256	}\r
	257	if (!iListener.iIsOpen)\r
	258	User::LeaveIfError(KErrNotSupported);\r
	259	}\r
	260	\r
ca482e5d	261	TInt CGameAudioMS::ChangeVolume(TInt aUp)\r
cc68a136	262	{\r
	263	//DEBUGPRINT(_L("CGameAudioMS::ChangeVolume(%i)"), aUp);\r
	264	\r
	265	if (iMdaAudioOutputStream) {\r
	266	if (aUp) {\r
ca482e5d	267	iVolume += 5;\r
	268	if (iVolume > iMdaAudioOutputStream->MaxVolume())\r
	269	iVolume = iMdaAudioOutputStream->MaxVolume();\r
cc68a136	270	} else {\r
ca482e5d	271	iVolume -= 5;\r
ca482e5d	272	if (iVolume < 0) iVolume = 0;\r
cc68a136	273	}\r
	274	iMdaAudioOutputStream->SetVolume(iVolume);\r
	275	}\r
ca482e5d	276	\r
ca482e5d	277	return iVolume;\r
cc68a136	278	}\r
	279	\r
	280	void TGameAudioEventListener::MaoscOpenComplete(TInt aError)\r
	281	{\r
ca482e5d	282	#ifdef DEBUG_UNDERFLOWS\r
cc68a136	283	DEBUGPRINT(_L("CGameAudioMS::MaoscOpenComplete, error=%d"), aError);\r
ca482e5d	284	#endif\r
cc68a136	285	\r
	286	iIsOpen = ETrue;\r
	287	if(aError) {\r
	288	iLastError = aError;\r
	289	iUnderflowed++;\r
	290	}\r
	291	else iUnderflowed = 0;\r
	292	}\r
	293	\r
	294	void TGameAudioEventListener::MaoscBufferCopied(TInt aError, const TDesC8& aBuffer)\r
	295	{\r
	296	if (aError)\r
	297	DEBUGPRINT(_L("CGameAudioMS::MaoscBufferCopied, error=%d"), aError);\r
	298	\r
	299	// iHasCopied = ETrue;\r
	300	\r
	301	if(aError) { // shit!\r
	302	iLastError = aError;\r
	303	iUnderflowed++;\r
	304	}\r
	305	}\r
	306	\r
	307	void TGameAudioEventListener::MaoscPlayComplete(TInt aError)\r
	308	{\r
ca482e5d	309	#ifdef DEBUG_UNDERFLOWS\r
cc68a136	310	DEBUGPRINT(_L("CGameAudioMS::MaoscPlayComplete: %i"), aError);\r
ca482e5d	311	#endif\r
cc68a136	312	if(aError) {\r
	313	iLastError = aError;\r
	314	iUnderflowed++; // never happened to me while testing, but just in case\r
	315	}\r
	316	}\r
	317	\r