SCUMM: Save/load music/sfx data in AD player.

This makes sure that the currently playing music and sfx are resumed when
loading a save game.

2 files changed, 50 insertions, 7 deletions

diff --git a/engines/scumm/players/player_ad.cpp b/engines/scumm/players/player_ad.cpp
index 08519b42cf..5ed50ab65c 100644
--- a/engines/scumm/players/player_ad.cpp
+++ b/engines/scumm/players/player_ad.cpp
@@ -185,8 +185,51 @@ void Player_AD::saveLoadWithSerializer(Serializer *ser) {
 		return;
 	}
 
-	// TODO: Be nicer than the original and save the data to continue the
-	// currently played sound resources on load?
+	if (ser->getVersion() >= VER(96)) {
+		int32 res[4] = {
+			_soundPlaying, _sfx[0].resource, _sfx[1].resource, _sfx[2].resource
+		};
+
+		// The first thing we save is a list of sound resources being played
+		// at the moment.
+		ser->saveLoadArrayOf(res, 4, sizeof(res[0]), sleInt32);
+
+		// If we are loading start the music again at this point.
+		if (ser->isLoading()) {
+			if (res[0] != -1) {
+				startSound(res[0]);
+			}
+		}
+
+		uint32 musicOffset = _curOffset;
+
+		static const SaveLoadEntry musicData[] = {
+			MKLINE(Player_AD, _engineMusicTimer, sleInt32, VER(96)),
+			MKLINE(Player_AD, _musicTimer, sleUint32, VER(96)),
+			MKLINE(Player_AD, _internalMusicTimer, sleUint32, VER(96)),
+			MKLINE(Player_AD, _curOffset, sleUint32, VER(96)),
+			MKLINE(Player_AD, _nextEventTimer, sleUint32, VER(96)),
+			MKEND()
+		};
+
+		ser->saveLoadEntries(this, musicData);
+
+		// We seek back to the old music position.
+		if (ser->isLoading()) {
+			SWAP(musicOffset, _curOffset);
+			musicSeekTo(musicOffset);
+		}
+
+		// Finally start up the SFX. This makes sure that they are not
+		// accidently stopped while seeking to the old music position.
+		if (ser->isLoading()) {
+			for (int i = 1; i < ARRAYSIZE(res); ++i) {
+				if (res[i] != -1) {
+					startSound(res[i]);
+				}
+			}
+		}
+	}
 }
 
 int Player_AD::readBuffer(int16 *buffer, const int numSamples) {
diff --git a/engines/scumm/players/player_ad.h b/engines/scumm/players/player_ad.h
index f5e7ecccbc..63a8503f47 100644
--- a/engines/scumm/players/player_ad.h
+++ b/engines/scumm/players/player_ad.h
@@ -81,7 +81,7 @@ private:
 	int _samplesTillCallbackRemainder;
 
 	int _soundPlaying;
-	int _engineMusicTimer;
+	int32 _engineMusicTimer;
 
 	struct SfxSlot;
 
@@ -120,8 +120,8 @@ private:
 	const byte *_musicData;
 	uint _timerLimit;
 	uint _musicTicks;
-	uint _musicTimer;
-	uint _internalMusicTimer;
+	uint32 _musicTimer;
+	uint32 _internalMusicTimer;
 	bool _loopFlag;
 	uint _musicLoopStart;
 	uint _instrumentOffset[16];
@@ -138,8 +138,8 @@ private:
 
 	uint _mdvdrState;
 
-	uint _curOffset;
-	uint _nextEventTimer;
+	uint32 _curOffset;
+	uint32 _nextEventTimer;
 
 	static const uint _noteFrequencies[12];
 	static const uint _mdvdrTable[6];