2 files changed, 165 insertions, 11 deletions

diff --git a/src/audio/AudioManager.cpp b/src/audio/AudioManager.cpp
index 6df4c052..9e86aef0 100644
--- a/src/audio/AudioManager.cpp
+++ b/src/audio/AudioManager.cpp
@@ -91,10 +91,154 @@ enum eVehicleModel
 cAudioManager &AudioManager = *(cAudioManager *)0x880FC0;
 
 constexpr int totalAudioEntitiesSlots = 200;
+constexpr int maxVolume = 127;
 
 char &g_nMissionAudioPlayingStatus = *(char *)0x60ED88;
 
 void
+cAudioManager::AddSampleToRequestedQueue()
+{
+	int32 calculatedVolume;
+	tActiveSample *sample;
+	int32 unknown1;
+	uint8 unknown2;
+	bool bReflections;
+
+	if(m_sQueueSample.m_nSampleIndex < TOTAL_AUDIO_SAMPLES) {
+		calculatedVolume = m_sQueueSample.field_16 * (maxVolume - m_sQueueSample.m_bVolume);
+		unknown2 = m_bSampleRequestQueuesStatus[m_bActiveSampleQueue];
+		if(unknown2 >= m_bActiveSamples) {
+			unknown1 = 27 * m_bActiveSampleQueue;
+			unknown2 = *(&m_asSamples[53].field_91 + m_bActiveSamples + unknown1);
+			if(m_asSamples[unknown1 + unknown2].calculatedVolume <= calculatedVolume)
+				return;
+		} else {
+			++m_bSampleRequestQueuesStatus[m_bActiveSampleQueue];
+		}
+		m_sQueueSample.calculatedVolume = calculatedVolume;
+		m_sQueueSample.m_bLoopEnded = 0;
+		if(m_sQueueSample.m_bIsDistant) {
+			m_sQueueSample.m_bRequireReflection = 0;
+			m_sQueueSample.m_bLoopsRemaining = 0;
+		}
+		if(m_bDynamicAcousticModelingStatus && m_sQueueSample.m_nLoopCount) {
+			bReflections = m_sQueueSample.m_bRequireReflection;
+		} else {
+			bReflections = false;
+			m_sQueueSample.m_bLoopsRemaining = 0;
+		}
+		m_sQueueSample.m_bRequireReflection = 0;
+
+		if(!m_bDynamicAcousticModelingStatus) m_sQueueSample.m_bReverbFlag = 0;
+
+		sample = &m_asSamples[27 * m_bActiveSampleQueue + unknown2];
+		sample->m_nEntityIndex = m_sQueueSample.m_nEntityIndex;
+		sample->field_4 = m_sQueueSample.field_4;
+		sample->m_nSampleIndex = m_sQueueSample.m_nSampleIndex;
+		sample->m_bBankIndex = m_sQueueSample.m_bBankIndex;
+		sample->m_bIsDistant = m_sQueueSample.m_bIsDistant;
+		sample->field_16 = m_sQueueSample.field_16;
+		sample->m_nFrequency = m_sQueueSample.m_nFrequency;
+		sample->m_bVolume = m_sQueueSample.m_bVolume;
+		sample->m_fDistance = m_sQueueSample.m_fDistance;
+		sample->m_nLoopCount = m_sQueueSample.m_nLoopCount;
+		sample->m_nLoopStart = m_sQueueSample.m_nLoopStart;
+		sample->m_nLoopEnd = m_sQueueSample.m_nLoopEnd;
+		sample->m_bEmittingVolume = m_sQueueSample.m_bEmittingVolume;
+		sample->field_48 = m_sQueueSample.field_48;
+		sample->m_fSoundIntensity = m_sQueueSample.m_fSoundIntensity;
+		sample->field_56 = m_sQueueSample.field_56;
+		sample->m_vecPos = m_sQueueSample.m_vecPos;
+		sample->m_bReverbFlag = m_sQueueSample.m_bReverbFlag;
+		sample->m_bLoopsRemaining = m_sQueueSample.m_bLoopsRemaining;
+		sample->m_bRequireReflection = m_sQueueSample.m_bRequireReflection;
+		sample->m_bOffset = m_sQueueSample.m_bOffset;
+		sample->field_76 = m_sQueueSample.field_76;
+		sample->m_bIsProcessed = m_sQueueSample.m_bIsProcessed;
+		sample->m_bLoopEnded = m_sQueueSample.m_bLoopEnded;
+		sample->calculatedVolume = m_sQueueSample.calculatedVolume;
+		sample->field_88 = m_sQueueSample.field_88;
+
+		AddDetailsToRequestedOrderList(unknown2);
+		if(bReflections) AddReflectionsToRequestedQueue();
+	}
+}
+
+void
+cAudioManager::AddDetailsToRequestedOrderList(uint8 sample)
+{
+	int32 offset;
+	uint32 i = 0;
+	if(sample != 0) {
+		for(; i < sample; i++) {
+			offset = 27 * m_bActiveSampleQueue;
+			if(m_asSamples[offset + m_abSampleQueueIndexTable[i + offset]]
+			       .calculatedVolume > m_asSamples[offset + sample].calculatedVolume)
+				break;
+		}
+		if(i < sample) {
+			memmove(&m_abSampleQueueIndexTable[offset + 1 + i],
+			        &m_abSampleQueueIndexTable[offset + i], m_bActiveSamples - i - 1);
+		}
+	}
+	m_abSampleQueueIndexTable[27 * m_bActiveSampleQueue + i] = sample;
+}
+
+void
+cAudioManager::AddReflectionsToRequestedQueue()
+{
+	float reflectionDistance;
+	int32 noise;
+	uint8 emittingVolume = emittingVolume =
+	    (m_sQueueSample.m_bVolume >> 1) + (m_sQueueSample.m_bVolume >> 3);
+
+	for(uint32 i = 0; i < 5u; i++) {
+		reflectionDistance = m_afReflectionsDistances[i];
+		if(reflectionDistance > 0.0f && reflectionDistance < 100.f &&
+		   reflectionDistance < m_sQueueSample.m_fSoundIntensity) {
+			m_sQueueSample.m_bLoopsRemaining = (reflectionDistance * 0.38873f); // @todo assert value
+			if(m_sQueueSample.m_bLoopsRemaining > 5u) {
+				m_sQueueSample.m_fDistance = m_afReflectionsDistances[i];
+				m_sQueueSample.m_bEmittingVolume = emittingVolume;
+				m_sQueueSample.m_bVolume =
+				    ComputeVolume(emittingVolume, m_sQueueSample.m_fSoundIntensity,
+				                  m_sQueueSample.m_fDistance);
+				if(m_sQueueSample.m_bVolume > emittingVolume >> 4) {
+					m_sQueueSample.field_4 += ((i + 1) << 8);
+					if(m_sQueueSample.m_nLoopCount) {
+						noise = RandomDisplacement(
+						    m_sQueueSample.m_nFrequency >> 5);
+						if(noise <= 0)
+							m_sQueueSample.m_nFrequency += noise;
+						else
+							m_sQueueSample.m_nFrequency -= noise;
+					}
+					m_sQueueSample.field_16 += 20;
+					m_sQueueSample.m_vecPos.x = m_avecReflectionsPos[i].x;
+					m_sQueueSample.m_vecPos.y = m_avecReflectionsPos[i].y;
+					m_sQueueSample.m_vecPos.z = m_avecReflectionsPos[i].z;
+					AddSampleToRequestedQueue();
+				}
+			}
+		}
+	}
+}
+
+uint32
+cAudioManager::ComputeVolume(int emittingVolume, float soundIntensity, float distance)
+{
+	float newSoundIntensity;
+	if(soundIntensity <= 0.0f) return 0;
+	if((soundIntensity * 0.2f) <= distance) {
+		newSoundIntensity = soundIntensity * 0.2f;
+		emittingVolume =
+		    sq((soundIntensity - distance) / (soundIntensity - newSoundIntensity)) *
+		    emittingVolume;
+	}
+	return emittingVolume;
+}
+
+void
 cAudioManager::Initialise()
 {
 	if(!m_bIsInitialised) {
@@ -409,7 +553,7 @@ cAudioManager::ResetPoliceRadio()
 void
 cAudioManager::InterrogateAudioEntities()
 {
-	for(uint32 i = 0; i < m_nAudioEntitiesTotal; i++) {
+	for(int32 i = 0; i < m_nAudioEntitiesTotal; i++) {
 		ProcessEntity(m_anAudioEntityIndices[i]);
 		m_asAudioEntities[m_anAudioEntityIndices[i]].field_24 = 0;
 	}
@@ -418,7 +562,7 @@ cAudioManager::InterrogateAudioEntities()
 void
 cAudioManager::ClearRequestedQueue()
 {
-	for(uint32 i = 0; i < m_bActiveSamples; i++) {
+	for(int32 i = 0; i < m_bActiveSamples; i++) {
 		m_abSampleQueueIndexTable[i + 27 * m_bActiveSampleQueue] = m_bActiveSamples;
 	}
 	m_bSampleRequestQueuesStatus[m_bActiveSampleQueue] = 0;
@@ -432,14 +576,14 @@ cAudioManager::ClearRequestedQueue()
 bool
 cAudioManager::UsesReverseWarning(int32 model)
 {
-	return model == LINERUN || fabs(model - FIRETRUK) <= 1 || model == BUS ||
+	return model == LINERUN || model == FIRETRUK || model == TRASH || model == BUS ||
 	       model == COACH; // fix
 }
 
 bool
 cAudioManager::HasAirBrakes(int32 model)
 {
-	return model == LINERUN || fabs(model - FIRETRUK) <= 1 || model == BUS ||
+	return model == LINERUN || model == FIRETRUK || model == TRASH || model == BUS ||
 	       model == COACH; // fix
 }
 
@@ -594,7 +738,7 @@ cAudioManager::DestroyEntity(int32 id)
 	if(m_bIsInitialised && id >= 0 && id < totalAudioEntitiesSlots &&
 	   m_asAudioEntities[id].m_bIsUsed) {
 		m_asAudioEntities[id].m_bIsUsed = 0;
-		for(uint32 i = 0; i < m_nAudioEntitiesTotal; ++i) {
+		for(int32 i = 0; i < m_nAudioEntitiesTotal; ++i) {
 			if(id == m_anAudioEntityIndices[i]) {
 				if(i < totalAudioEntitiesSlots - 1)
 					memmove(&m_anAudioEntityIndices[i],
@@ -2816,6 +2960,11 @@ cAudioManager::Service()
 }
 
 STARTPATCHES
+InjectHook(0x57B070, &cAudioManager::AddSampleToRequestedQueue, PATCH_JUMP);
+InjectHook(0x57B210, &cAudioManager::AddDetailsToRequestedOrderList, PATCH_JUMP);
+InjectHook(0x57B300, &cAudioManager::AddReflectionsToRequestedQueue, PATCH_JUMP);
+InjectHook(0x57ABB0, &cAudioManager::ComputeVolume, PATCH_JUMP);
+
 InjectHook(0x57A0E0, &cAudioManager::Initialise, PATCH_JUMP);
 InjectHook(0x569420, &cAudioManager::PostInitialiseGameSpecificSetup, PATCH_JUMP);
 //InjectHook(0x57EAC0, &cAudioManager::InitialisePoliceRadioZones, PATCH_JUMP);
diff --git a/src/audio/AudioManager.h b/src/audio/AudioManager.h
index 9796c1c8..7a2dc9c5 100644
--- a/src/audio/AudioManager.h
+++ b/src/audio/AudioManager.h
@@ -44,7 +44,7 @@ public:
 	char m_bLoopEnded;
 	char field_82;
 	char field_83;
-	int field_84;
+	int calculatedVolume;
 	char field_88;
 	char field_89;
 	char field_90;
@@ -218,15 +218,20 @@ public:
 	char field_19195;
 	int m_nTimeOfRecentCrime;
 
+	void AddSampleToRequestedQueue();
+
+	void AddDetailsToRequestedOrderList(uint8 sample);
+	void AddReflectionsToRequestedQueue();
+
+	uint32 ComputeVolume(int emittingVolume, float soundIntensity, float distance);
+
 	void Initialise();
 	void PostInitialiseGameSpecificSetup();
-	void InitialisePoliceRadioZones(); // @todo
+	void InitialisePoliceRadioZones();       // @todo
 	void ResetAudioLogicTimers(int32 timer); // @todo
 
 	void Terminate();
 
-	// done
-
 	char GetMissionScriptPoliceAudioPlayingStatus();
 	bool GetMissionAudioLoadingStatus();
 
@@ -270,7 +275,7 @@ public:
 	void InterrogateAudioEntities();
 
 	void ClearRequestedQueue();
-//	void AgeCrimes();
+	//	void AgeCrimes(); //todo
 
 	bool UsesReverseWarning(int32 model);
 	bool HasAirBrakes(int32 model);
@@ -283,7 +288,7 @@ public:
 	void ProcessPlane(void *);        // todo
 
 	void ClearMissionAudio();
-//	void ProcessReverb();
+	//	void ProcessReverb(); // todo
 
 	bool IsMissionAudioSampleFinished();