- added initial radio chatter sfx, still not fully correct

- remove obsolete mixerStreamRunning track variable

svn-id: r35801

3 files changed, 26 insertions, 2 deletions

diff --git a/engines/scumm/imuse_digi/dimuse.cpp b/engines/scumm/imuse_digi/dimuse.cpp
index 2d9ce251a4..54c8c041c4 100644
--- a/engines/scumm/imuse_digi/dimuse.cpp
+++ b/engines/scumm/imuse_digi/dimuse.cpp
@@ -98,6 +98,7 @@ void IMuseDigital::resetState() {
 	memset(_attributes, 0, sizeof(_attributes));
 	_nextSeqToPlay = 0;
 	_stopingSequence = 0;
+	_radioChatterSFX = 0;
 	_triggerUsed = false;
 }
 
@@ -112,6 +113,7 @@ void IMuseDigital::saveOrLoad(Serializer *ser) {
 		MKLINE(IMuseDigital, _curMusicSeq, sleInt32, VER(31)),
 		MKLINE(IMuseDigital, _curMusicCue, sleInt32, VER(31)),
 		MKLINE(IMuseDigital, _nextSeqToPlay, sleInt32, VER(31)),
+		MKLINE(IMuseDigital, _radioChatterSFX, sleByte, VER(76)),
 		MKARRAY(IMuseDigital, _attributes[0], sleInt32, 188, VER(31)),
 		MKEND()
 	};
@@ -128,7 +130,7 @@ void IMuseDigital::saveOrLoad(Serializer *ser) {
 		MKLINE(Track, used, sleByte, VER(31)),
 		MKLINE(Track, toBeRemoved, sleByte, VER(31)),
 		MKLINE(Track, souStreamUsed, sleByte, VER(31)),
-		MKLINE(Track, mixerStreamRunning, sleByte, VER(31)),	// FIXME: OBSOLETE, remove this!
+		MK_OBSOLETE(Track, mixerStreamRunning, sleByte, VER(31), VER(76)),
 		MKLINE(Track, soundPriority, sleInt32, VER(31)),
 		MKLINE(Track, regionOffset, sleInt32, VER(31)),
 		MK_OBSOLETE(Track, trackOffset, sleInt32, VER(31), VER(31)),
@@ -309,6 +311,25 @@ void IMuseDigital::callback() {
 						}
 					} else if (bits == 8) {
 						curFeedSize = _sound->getDataFromRegion(track->soundDesc, track->curRegion, &tmpSndBufferPtr, track->regionOffset, feedSize);
+						if (_radioChatterSFX && track->volGroupId == IMUSE_VOLGRP_VOICE) {
+							byte *buf = new byte[curFeedSize];
+							int index = 0;
+							int count = curFeedSize;
+							byte *ptr_1 = tmpSndBufferPtr;
+							byte *ptr_2 = tmpSndBufferPtr + 4;
+							int value = ptr_1[0] - 0x80;
+							value += ptr_1[1] - 0x80;
+							value += ptr_1[2] - 0x80;
+							value += ptr_1[3] - 0x80;
+							do {
+								int t = *ptr_1++;
+								int v = t - (value / 4);
+								value = (int)(*(ptr_2++) - 0x80) + (value - t + 128);
+								buf[index++] = (byte)v * 4;
+							} while (--count);
+							delete[] tmpSndBufferPtr;
+							tmpSndBufferPtr = buf;
+						}
 						if (channels == 2) {
 							curFeedSize &= ~1;
 						}
diff --git a/engines/scumm/imuse_digi/dimuse.h b/engines/scumm/imuse_digi/dimuse.h
index bcd6e45244..76fb8483ac 100644
--- a/engines/scumm/imuse_digi/dimuse.h
+++ b/engines/scumm/imuse_digi/dimuse.h
@@ -85,6 +85,7 @@ private:
 	int32 _curMusicSeq;		// current or previous id of sequence music
 	int32 _curMusicCue;		// current cue for current music. used in FT
 	int _stopingSequence;
+	bool _radioChatterSFX;
 
 	int32 makeMixerFlags(int32 flags);
 	static void timer_handler(void *refConf);
@@ -136,6 +137,9 @@ public:
 
 	void saveOrLoad(Serializer *ser);
 	void resetState();
+	void setRadioChatterSFX(bool state) {
+		_radioChatterSFX = state;
+	}
 
 	void setPriority(int soundId, int priority);
 	void setVolume(int soundId, int volume);
diff --git a/engines/scumm/imuse_digi/dimuse_track.h b/engines/scumm/imuse_digi/dimuse_track.h
index 2d4c673cf6..c2ed64a556 100644
--- a/engines/scumm/imuse_digi/dimuse_track.h
+++ b/engines/scumm/imuse_digi/dimuse_track.h
@@ -61,7 +61,6 @@ struct Track {
 	char soundName[15]; // sound name but also filename of sound in bundle data
 	bool used;			// flag mean that track is used
 	bool toBeRemoved;   // flag mean that track need to be free
-	bool mixerStreamRunning;	// flag mean sound mixer's stream is running OBSOLETE
 	bool souStreamUsed;	// flag mean that track use stream from sou file
 	bool sndDataExtComp;// flag mean that sound data is compressed by scummvm tools
 	int32 soundPriority;// priority level of played sound (0-127)