DREAMWEB: Blacklist and reimplement cancelch0() and cancelch1()

Now any sound playing on the channels is stopped immediately. This
fixes missing voice-overs in the intro, makes it possible to skip
lines of conversation, and fixes a problem where the sound effect
from the Altar Room would keep playing after leaving the room.
Possibly other glitches as well.

6 files changed, 84 insertions, 27 deletions

diff --git a/engines/dreamweb/dreamgen.cpp b/engines/dreamweb/dreamgen.cpp
index b8a5e5122b..3c10ea69d1 100644
--- a/engines/dreamweb/dreamgen.cpp
+++ b/engines/dreamweb/dreamgen.cpp
@@ -1,5 +1,29 @@
 /* PLEASE DO NOT MODIFY THIS FILE. ALL CHANGES WILL BE LOST! LOOK FOR README FOR DETAILS */
 
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+
+
 #include "dreamgen.h"
 
 namespace DreamGen {
@@ -16570,19 +16594,6 @@ endlessloop:
 	data.word(kCh0blockstocopy) = ax;
 }
 
-void DreamGenContext::cancelch0() {
-	STACK_CHECK;
-	data.byte(kCh0repeat) = 0;
-	data.word(kCh0blockstocopy) = 0;
-	data.byte(kCh0playing) = 255;
-}
-
-void DreamGenContext::cancelch1() {
-	STACK_CHECK;
-	data.word(kCh1blockstocopy) = 0;
-	data.byte(kCh1playing) = 255;
-}
-
 void DreamGenContext::channel0tran() {
 	STACK_CHECK;
 	_cmp(data.byte(kVolume), 0);
@@ -21922,8 +21933,6 @@ void DreamGenContext::__dispatch_call(uint16 addr) {
 		case addr_makenextblock: makenextblock(); break;
 		case addr_volumeadjust: volumeadjust(); break;
 		case addr_loopchannel0: loopchannel0(); break;
-		case addr_cancelch0: cancelch0(); break;
-		case addr_cancelch1: cancelch1(); break;
 		case addr_channel0only: channel0only(); break;
 		case addr_channel1only: channel1only(); break;
 		case addr_channel0tran: channel0tran(); break;
diff --git a/engines/dreamweb/dreamgen.h b/engines/dreamweb/dreamgen.h
index 032ad5847c..88ecfd53d4 100644
--- a/engines/dreamweb/dreamgen.h
+++ b/engines/dreamweb/dreamgen.h
@@ -3,6 +3,30 @@
 
 /* PLEASE DO NOT MODIFY THIS FILE. ALL CHANGES WILL BE LOST! LOOK FOR README FOR DETAILS */
 
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+
+
 
 #include "dreamweb/runtime.h"
 
@@ -180,8 +204,6 @@ public:
 	static const uint16 addr_channel0tran = 0xc920;
 	static const uint16 addr_channel1only = 0xc91c;
 	static const uint16 addr_channel0only = 0xc918;
-	static const uint16 addr_cancelch1 = 0xc914;
-	static const uint16 addr_cancelch0 = 0xc910;
 	static const uint16 addr_loopchannel0 = 0xc90c;
 	static const uint16 addr_volumeadjust = 0xc908;
 	static const uint16 addr_makenextblock = 0xc904;
@@ -1325,7 +1347,6 @@ public:
 	void clearbuffers();
 	void neterror();
 	void storeit();
-	void lockeddoorway();
 	void isitworn();
 	void putundertimed();
 	void dumpmap();
@@ -1454,10 +1475,10 @@ public:
 	void dumpkeypad();
 	void dumpzoom();
 	void endgameseq();
-	void cancelch0();
+	//void cancelch0();
 	void setbotleft();
 	void findfirstpath();
-	void showallfree();
+	void fadescreenup();
 	void loadold();
 	void loadtempcharset();
 	void useslab();
@@ -1512,7 +1533,7 @@ public:
 	void loadspeech();
 	//void cls();
 	//void printsprites();
-	void dumptimedtext();
+	void checkifperson();
 	void showallobs();
 	void getnumber();
 	void adjustleft();
@@ -1580,7 +1601,7 @@ public:
 	void folderhints();
 	void openhoteldoor();
 	void removesetobject();
-	void checkifperson();
+	void dumptimedtext();
 	//void frameoutfx();
 	void blank();
 	void drinker();
@@ -1634,7 +1655,6 @@ public:
 	void fadetowhite();
 	void textformonk();
 	void loadsavebox();
-	void fadescreenup();
 	void soundend();
 	void redes();
 	void errormessage1();
@@ -1682,9 +1702,8 @@ public:
 	void showmonk();
 	void diarykeyn();
 	void set16colpalette();
-	void convicons();
-	void interviewer();
 	void sparky();
+	void interviewer();
 	void purgeanitem();
 	void madman();
 	void createpanel();
@@ -1813,6 +1832,7 @@ public:
 	void pickupob();
 	void error();
 	void showopbox();
+	//void cancelch1();
 	void clearbeforeload();
 	void biblequote();
 	void doload();
@@ -1964,7 +1984,7 @@ public:
 	void initialmoncols();
 	void checkforshake();
 	void usebuttona();
-	void cancelch1();
+	void showallfree();
 	//void getnextword();
 	void generalerror();
 	void actualload();
@@ -1979,12 +1999,14 @@ public:
 	void usechurchgate();
 	void monkandryan();
 	void allocatebuffers();
+	void convicons();
 	void swapwithinv();
 	void usecontrol();
 	void buttonseven();
 	void redrawmainscrn();
 	void finishedwalking();
 	void findallryan();
+	void lockeddoorway();
 	void channel0tran();
 	void buttonpress();
 	void parseblaster();
diff --git a/engines/dreamweb/dreamweb.cpp b/engines/dreamweb/dreamweb.cpp
index a5a6c9096a..caf3a987c4 100644
--- a/engines/dreamweb/dreamweb.cpp
+++ b/engines/dreamweb/dreamweb.cpp
@@ -477,6 +477,16 @@ void DreamWebEngine::playSound(uint8 channel, uint8 id, uint8 loops) {
 	_mixer->playStream(type, &_channelHandle[channel], stream);
 }
 
+void DreamWebEngine::stopSound(uint8 channel) {
+	debug(1, "stopSound(%u)", channel);
+	assert(channel == 0 || channel == 1);
+	_mixer->stopHandle(_channelHandle[channel]);
+	if (channel == 0)
+		_channel0 = 0;
+	else
+		_channel1 = 0;
+}
+
 bool DreamWebEngine::loadSpeech(const Common::String &filename) {
 	if (ConfMan.getBool("speech_mute"))
 		return false;
diff --git a/engines/dreamweb/dreamweb.h b/engines/dreamweb/dreamweb.h
index 1bc2f19d1c..6ada207496 100644
--- a/engines/dreamweb/dreamweb.h
+++ b/engines/dreamweb/dreamweb.h
@@ -111,6 +111,8 @@ public:
 	Common::Language getLanguage() const { return _language; }
 	uint8 modifyChar(uint8 c) const;
 
+	void stopSound(uint8 channel);
+
 private:
 	void keyPressed(uint16 ascii);
 	void setSpeed(uint speed);
diff --git a/engines/dreamweb/stubs.cpp b/engines/dreamweb/stubs.cpp
index 96d46110f9..54685a018a 100644
--- a/engines/dreamweb/stubs.cpp
+++ b/engines/dreamweb/stubs.cpp
@@ -1241,5 +1241,18 @@ void DreamGenContext::lockmon() {
 	}
 }
 
+void DreamGenContext::cancelch0() {
+	data.byte(kCh0repeat) = 0;
+	data.word(kCh0blockstocopy) = 0;
+	data.byte(kCh0playing) = 255;
+	engine->stopSound(0);
+}
+
+void DreamGenContext::cancelch1() {
+	data.word(kCh1blockstocopy) = 0;
+	data.byte(kCh1playing) = 255;
+	engine->stopSound(1);
+}
+
 } /*namespace dreamgen */
 
diff --git a/engines/dreamweb/stubs.h b/engines/dreamweb/stubs.h
index a113bf79cd..a3cb680cca 100644
--- a/engines/dreamweb/stubs.h
+++ b/engines/dreamweb/stubs.h
@@ -69,4 +69,5 @@
 	void turnpathoffCPP(uint8 param);
 	void modifychar();
 	void lockmon();
-
+	void cancelch0();
+	void cancelch1();