Added looping background noise to the IHNM intro. I don't know if it's the

correct sound or the correct volume, but the small extension to allow the
engine to start looping sounds is worthwhile enough in itself, I think.

svn-id: r15895

7 files changed, 36 insertions, 8 deletions

diff --git a/saga/events.cpp b/saga/events.cpp
index 435256517f..f377b444d1 100644
--- a/saga/events.cpp
+++ b/saga/events.cpp
@@ -309,6 +309,11 @@ int Events::handleOneShot(EVENT *event) {
 		}
 
 		break;
+	case SOUND_EVENT:
+		_vm->_sound->stopSound();
+		if (event->op == EVENT_PLAY)
+			_vm->_sndRes->playSound(event->param, event->param2, event->param3 != 0);
+		break;
 	case VOICE_EVENT:
 		_vm->_sndRes->playVoice(event->param);
 		break;
diff --git a/saga/ihnm_introproc.cpp b/saga/ihnm_introproc.cpp
index 0ceba8545c..45ea1e1dee 100644
--- a/saga/ihnm_introproc.cpp
+++ b/saga/ihnm_introproc.cpp
@@ -339,11 +339,30 @@ int Scene::IHNMHateProc(int param, SCENE_INFO *scene_info) {
 
 		q_event = _vm->_events->queue(&event);
 
+		// Background sound
+		event.type = ONESHOT_EVENT;
+		event.code = SOUND_EVENT;
+		event.op = EVENT_PLAY;
+		event.param = 260;	// FIXME: Verify sound
+		event.param2 = 255;	// FIXME: Verify volume
+		event.param3 = SOUND_LOOP;
+		event.time = 0;
+
+		q_event = _vm->_events->queue(&event);
+
+		// End background sound after the voice has finished
+		event.type = ONESHOT_EVENT;
+		event.code = SOUND_EVENT;
+		event.op = EVENT_STOP;
+		event.time = _vm->_sndRes->getVoiceLength(0);
+
+		q_event = _vm->_events->chain(q_event, &event);
+
 		// End scene after the voice has finished
 		event.type = ONESHOT_EVENT;
 		event.code = SCENE_EVENT;
 		event.op = EVENT_END;
-		event.time = _vm->_sndRes->getVoiceLength(0);
+		event.time = 0;
 
 		q_event = _vm->_events->chain(q_event, &event);
 		break;
diff --git a/saga/sfuncs.cpp b/saga/sfuncs.cpp
index 1963444a4e..398d075e13 100644
--- a/saga/sfuncs.cpp
+++ b/saga/sfuncs.cpp
@@ -1156,7 +1156,7 @@ int Script::SF_playSound(SCRIPTFUNC_PARAMS) {
 	SDataWord_T param = thread->pop() - 13;
 
 	if (/* param >= 0 && */ param < ARRAYSIZE(sfxTable))
-		_vm->_sndRes->playSound(sfxTable[param].res, sfxTable[param].vol);
+		_vm->_sndRes->playSound(sfxTable[param].res, sfxTable[param].vol, false);
 	else
 		_vm->_sound->stopSound();
 
diff --git a/saga/sndres.cpp b/saga/sndres.cpp
index 13426fa91e..5c7b583123 100644
--- a/saga/sndres.cpp
+++ b/saga/sndres.cpp
@@ -53,7 +53,7 @@ SndRes::SndRes(SagaEngine *vm) : _vm(vm) {
 	_init = 1;
 }
 
-int SndRes::playSound(uint32 sound_rn, int volume) {
+int SndRes::playSound(uint32 sound_rn, int volume, bool loop) {
 	SOUNDBUFFER snd_buffer;
 
 	debug(0, "SndRes::playSound(%ld)", sound_rn);
@@ -63,7 +63,7 @@ int SndRes::playSound(uint32 sound_rn, int volume) {
 		return FAILURE;
 	}
 
-	_vm->_sound->playSound(&snd_buffer, volume);
+	_vm->_sound->playSound(&snd_buffer, volume, loop);
 
 	return SUCCESS;
 }
diff --git a/saga/sndres.h b/saga/sndres.h
index ec823a8673..b5bdd65c48 100644
--- a/saga/sndres.h
+++ b/saga/sndres.h
@@ -67,7 +67,7 @@ public:
 	SndRes(SagaEngine *vm);
 
 	int loadSound(uint32 sound_rn);
-	int playSound(uint32 sound_rn, int volume);
+	int playSound(uint32 sound_rn, int volume, bool loop);
 	int playVoice(uint32 voice_rn);
 	int getVoiceLength(uint32 voice_rn);
 
diff --git a/saga/sound.cpp b/saga/sound.cpp
index e63f675ca0..e68b71384f 100644
--- a/saga/sound.cpp
+++ b/saga/sound.cpp
@@ -190,8 +190,8 @@ int Sound::playSoundBuffer(PlayingSoundHandle *handle, SOUNDBUFFER *buf, int vol
 	return SUCCESS;
 }
 
-int Sound::playSound(SOUNDBUFFER *buf, int volume) {
-	return playSoundBuffer(&_effectHandle, buf, 2 * volume, false);
+int Sound::playSound(SOUNDBUFFER *buf, int volume, bool loop) {
+	return playSoundBuffer(&_effectHandle, buf, 2 * volume, loop);
 }
 
 int Sound::pauseSound() {
diff --git a/saga/sound.h b/saga/sound.h
index 06292c2099..1f339b2f5a 100644
--- a/saga/sound.h
+++ b/saga/sound.h
@@ -32,6 +32,10 @@
 
 namespace Saga {
 
+enum SOUND_FLAGS {
+	SOUND_LOOP = 1
+};
+
 struct SOUNDBUFFER {
 	uint16 s_freq;
 	int s_samplebits;
@@ -48,7 +52,7 @@ public:
 	Sound(SagaEngine *vm, SoundMixer *mixer, int enabled);
 	~Sound();
 
-	int playSound(SOUNDBUFFER *buf, int volume);
+	int playSound(SOUNDBUFFER *buf, int volume, bool loop);
 	int pauseSound();
 	int resumeSound();
 	int stopSound();