[Scummvm-cvs-logs] scummvm master -> 356403233047e260e34887ba0144892be322f472

salty-horse ori at avtalion.name
Thu Apr 14 15:11:58 CEST 2016 

This automated email contains information about 1 new commit which have been
pushed to the 'scummvm' repo located at https://github.com/scummvm/scummvm .

Summary:
3564032330 JANITORIAL: Reduce audio header dependencies


Commit: 356403233047e260e34887ba0144892be322f472
    https://github.com/scummvm/scummvm/commit/356403233047e260e34887ba0144892be322f472
Author: Ori Avtalion (ori at avtalion.name)
Date: 2016-04-14T16:10:21+03:00

Commit Message:
JANITORIAL: Reduce audio header dependencies

Changed paths:
    audio/adlib.cpp
    audio/decoders/3do.cpp
    audio/decoders/3do.h
    audio/miles_adlib.cpp
    audio/mods/protracker.cpp
    audio/softsynth/fmtowns_pc98/towns_audio.h
    engines/access/sound.cpp
    engines/access/sound.h
    engines/access/video/movie_decoder.h
    engines/agi/agi.cpp
    engines/agi/preagi.cpp
    engines/agi/preagi.h
    engines/agi/sound_midi.cpp
    engines/agi/sound_sarien.cpp
    engines/avalanche/animation.cpp
    engines/avalanche/avalanche.cpp
    engines/avalanche/clock.cpp
    engines/avalanche/dialogs.cpp
    engines/avalanche/ghostroom.cpp
    engines/avalanche/graphics.cpp
    engines/avalanche/highscore.cpp
    engines/avalanche/mainmenu.cpp
    engines/avalanche/nim.cpp
    engines/avalanche/parser.cpp
    engines/avalanche/shootemup.cpp
    engines/avalanche/sound.cpp
    engines/avalanche/sound.h
    engines/bbvs/bbvs.cpp
    engines/bbvs/bbvs.h
    engines/bbvs/sound.cpp
    engines/bbvs/sound.h
    engines/cge/sound.cpp
    engines/cge/sound.h
    engines/cge2/saveload.cpp
    engines/cge2/sound.cpp
    engines/cge2/sound.h
    engines/composer/composer.cpp
    engines/composer/composer.h
    engines/cruise/sound.cpp
    engines/draci/music.cpp
    engines/drascula/drascula.cpp
    engines/dreamweb/detection.cpp
    engines/dreamweb/dreamweb.h
    engines/dreamweb/saveload.cpp
    engines/dreamweb/sound.cpp
    engines/dreamweb/stubs.cpp
    engines/dreamweb/vgagrafx.cpp
    engines/gob/inter_v2.cpp
    engines/gob/sound/adlib.h
    engines/gob/sound/bgatmosphere.h
    engines/gob/sound/pcspeaker.cpp
    engines/gob/sound/pcspeaker.h
    engines/gob/sound/protracker.cpp
    engines/gob/sound/protracker.h
    engines/gob/sound/soundblaster.h
    engines/gob/sound/sounddesc.cpp
    engines/groovie/groovie.cpp
    engines/groovie/music.h
    engines/groovie/player.cpp
    engines/groovie/player.h
    engines/groovie/roq.cpp
    engines/groovie/script.cpp
    engines/groovie/vdx.cpp
    engines/hopkins/sound.cpp
    engines/hopkins/sound.h
    engines/hugo/sound.cpp
    engines/hugo/sound.h
    engines/kyra/eobcommon.cpp
    engines/kyra/sound_adlib.cpp
    engines/lab/anim.cpp
    engines/lab/dispman.cpp
    engines/lab/engine.cpp
    engines/lab/intro.cpp
    engines/lab/lab.cpp
    engines/lab/map.cpp
    engines/lab/music.cpp
    engines/lab/music.h
    engines/lab/resource.cpp
    engines/lab/special.cpp
    engines/lure/lure.h
    engines/mads/nebular/sound_nebular.cpp
    engines/mads/nebular/sound_nebular.h
    engines/mads/sound.cpp
    engines/mads/sound.h
    engines/mohawk/sound.cpp
    engines/mohawk/sound.h
    engines/mortevielle/sound.cpp
    engines/mortevielle/sound.h
    engines/neverhood/neverhood.h
    engines/neverhood/sound.h
    engines/prince/prince.cpp
    engines/prince/sound.cpp
    engines/prince/sound.h
    engines/queen/sound.cpp
    engines/queen/sound.h
    engines/saga/music.cpp
    engines/saga/music.h
    engines/saga/shorten.cpp
    engines/saga/shorten.h
    engines/saga/sound.cpp
    engines/sci/sound/drivers/midi.cpp
    engines/sci/sound/music.h
    engines/sci/sound/soundcmd.cpp
    engines/scumm/dialogs.cpp
    engines/scumm/he/animation_he.cpp
    engines/scumm/he/animation_he.h
    engines/scumm/he/sound_he.cpp
    engines/scumm/imuse_digi/dimuse.h
    engines/scumm/imuse_digi/dimuse_sndmgr.cpp
    engines/scumm/imuse_digi/dimuse_sndmgr.h
    engines/scumm/imuse_digi/dimuse_track.h
    engines/scumm/midiparser_ro.cpp
    engines/scumm/players/player_ad.h
    engines/scumm/players/player_apple2.h
    engines/scumm/players/player_v2cms.cpp
    engines/scumm/players/player_v3m.h
    engines/scumm/players/player_v5m.h
    engines/scumm/saveload.cpp
    engines/scumm/smush/smush_mixer.cpp
    engines/scumm/smush/smush_mixer.h
    engines/scumm/smush/smush_player.cpp
    engines/scumm/smush/smush_player.h
    engines/scumm/sound.cpp
    engines/scumm/sound.h
    engines/sherlock/debugger.cpp
    engines/sherlock/music.cpp
    engines/sherlock/music.h
    engines/sherlock/scalpel/3do/movie_decoder.cpp
    engines/sherlock/scalpel/drivers/adlib.cpp
    engines/sherlock/scalpel/scalpel_debugger.cpp
    engines/sherlock/sound.h
    engines/sky/music/adlibchannel.cpp
    engines/sky/music/adlibchannel.h
    engines/sky/music/adlibmusic.cpp
    engines/sky/music/adlibmusic.h
    engines/sword1/logic.h
    engines/sword1/sound.cpp
    engines/sword2/music.cpp
    engines/sword25/sfx/soundengine.cpp
    engines/sword25/sfx/soundengine.h
    engines/teenagent/font.cpp
    engines/teenagent/resources.cpp
    engines/teenagent/teenagent.h
    engines/testbed/midi.cpp
    engines/testbed/midi.h
    engines/tinsel/bmv.cpp
    engines/tinsel/bmv.h
    engines/tinsel/music.cpp
    engines/tinsel/sound.cpp
    engines/toltecs/movie.cpp
    engines/toltecs/movie.h
    engines/touche/touche.cpp
    engines/touche/touche.h
    engines/tsage/sound.h
    engines/tsage/tsage.h
    engines/voyeur/animation.h
    engines/voyeur/sound.cpp
    engines/voyeur/sound.h
    engines/zvision/core/events.cpp
    engines/zvision/scripting/actions.h
    engines/zvision/sound/midi.cpp
    engines/zvision/sound/midi.h
    engines/zvision/zvision.cpp
    video/mpegps_decoder.cpp
    video/psx_decoder.cpp



diff --git a/audio/adlib.cpp b/audio/adlib.cpp
index f609164..3e3f5c0 100644
--- a/audio/adlib.cpp
+++ b/audio/adlib.cpp
@@ -20,7 +20,6 @@
  *
  */
 
-#include "audio/softsynth/emumidi.h"
 #include "common/debug.h"
 #include "common/error.h"
 #include "common/scummsys.h"
diff --git a/audio/decoders/3do.cpp b/audio/decoders/3do.cpp
index 6d558d4..60cc515 100644
--- a/audio/decoders/3do.cpp
+++ b/audio/decoders/3do.cpp
@@ -25,7 +25,6 @@
 #include "common/util.h"
 
 #include "audio/decoders/3do.h"
-#include "audio/decoders/raw.h"
 #include "audio/decoders/adpcm_intern.h"
 
 namespace Audio {
diff --git a/audio/decoders/3do.h b/audio/decoders/3do.h
index 7524358..7f617c6 100644
--- a/audio/decoders/3do.h
+++ b/audio/decoders/3do.h
@@ -31,19 +31,12 @@
 
 #include "common/scummsys.h"
 #include "common/types.h"
-#include "common/substream.h"
+#include "common/stream.h"
 
 #include "audio/audiostream.h"
-#include "audio/decoders/raw.h"
-
-namespace Common {
-class SeekableReadStream;
-}
 
 namespace Audio {
 
-class SeekableAudioStream;
-
 // amount of bytes to be used within the decoder classes as buffers
 #define AUDIO_3DO_CACHE_SIZE 1024
 
diff --git a/audio/miles_adlib.cpp b/audio/miles_adlib.cpp
index bf5c9d4..0693d1e 100644
--- a/audio/miles_adlib.cpp
+++ b/audio/miles_adlib.cpp
@@ -27,7 +27,6 @@
 #include "common/textconsole.h"
 
 #include "audio/fmopl.h"
-#include "audio/softsynth/emumidi.h"
 
 namespace Audio {
 
diff --git a/audio/mods/protracker.cpp b/audio/mods/protracker.cpp
index 2578e94..ce52b61 100644
--- a/audio/mods/protracker.cpp
+++ b/audio/mods/protracker.cpp
@@ -24,8 +24,6 @@
 #include "audio/mods/paula.h"
 #include "audio/mods/module.h"
 
-#include "audio/audiostream.h"
-
 #include "common/textconsole.h"
 
 namespace Modules {
diff --git a/audio/softsynth/fmtowns_pc98/towns_audio.h b/audio/softsynth/fmtowns_pc98/towns_audio.h
index 93eeafb..0003f02 100644
--- a/audio/softsynth/fmtowns_pc98/towns_audio.h
+++ b/audio/softsynth/fmtowns_pc98/towns_audio.h
@@ -23,7 +23,9 @@
 #ifndef TOWNS_AUDIO_H
 #define TOWNS_AUDIO_H
 
-#include "audio/mixer.h"
+namespace Audio {
+class Mixer;
+}
 
 class TownsAudioInterfaceInternal;
 
diff --git a/engines/access/sound.cpp b/engines/access/sound.cpp
index 38f544d..448f630 100644
--- a/engines/access/sound.cpp
+++ b/engines/access/sound.cpp
@@ -20,9 +20,11 @@
  *
  */
 
-#include "common/algorithm.h"
 #include "common/config-manager.h"
 #include "audio/mixer.h"
+#include "audio/audiostream.h"
+#include "audio/mididrv.h"
+#include "audio/midiparser.h"
 #include "audio/decoders/raw.h"
 #include "audio/decoders/wave.h"
 // Miles Audio
diff --git a/engines/access/sound.h b/engines/access/sound.h
index b372e56..d82ee95 100644
--- a/engines/access/sound.h
+++ b/engines/access/sound.h
@@ -24,14 +24,16 @@
 #define ACCESS_SOUND_H
 
 #include "common/scummsys.h"
-#include "audio/audiostream.h"
 #include "audio/mixer.h"
 #include "access/files.h"
 #include "audio/midiplayer.h"
-#include "audio/midiparser.h"
 
 #define MAX_SOUNDS 20
 
+namespace Audio {
+class AudioStream;
+}
+
 namespace Access {
 
 class AccessEngine;
diff --git a/engines/access/video/movie_decoder.h b/engines/access/video/movie_decoder.h
index fe8a89f..8b5d948 100644
--- a/engines/access/video/movie_decoder.h
+++ b/engines/access/video/movie_decoder.h
@@ -23,13 +23,8 @@
 #ifndef ACCESS_VIDEO_MOVIE_DECODER_H
 #define ACCESS_VIDEO_MOVIE_DECODER_H
 
-#include "common/rect.h"
 #include "video/video_decoder.h"
-#include "audio/decoders/raw.h"
-
-namespace Audio {
-class QueuingAudioStream;
-}
+#include "audio/audiostream.h"
 
 namespace Common {
 class SeekableReadStream;
diff --git a/engines/agi/agi.cpp b/engines/agi/agi.cpp
index 6e63cd3..e566ad1 100644
--- a/engines/agi/agi.cpp
+++ b/engines/agi/agi.cpp
@@ -37,7 +37,6 @@
 #include "graphics/cursorman.h"
 
 #include "audio/mididrv.h"
-#include "audio/mixer.h"
 
 #include "agi/agi.h"
 #include "agi/font.h"
diff --git a/engines/agi/preagi.cpp b/engines/agi/preagi.cpp
index bb5d3b8..7e2e65a 100644
--- a/engines/agi/preagi.cpp
+++ b/engines/agi/preagi.cpp
@@ -20,16 +20,14 @@
  *
  */
 
-#include "common/config-manager.h"
+#include "audio/softsynth/pcspk.h"
+
 #include "common/debug-channels.h"
 #include "common/events.h"
 #include "common/random.h"
-#include "common/textconsole.h"
 
 #include "agi/preagi.h"
 #include "agi/graphics.h"
-#include "agi/keyboard.h"
-#include "agi/text.h"
 
 namespace Agi {
 
diff --git a/engines/agi/preagi.h b/engines/agi/preagi.h
index 289b5ec..d6026a5 100644
--- a/engines/agi/preagi.h
+++ b/engines/agi/preagi.h
@@ -25,7 +25,9 @@
 
 #include "agi/agi.h"
 
-#include "audio/softsynth/pcspk.h"
+namespace Audio {
+class PCSpeaker;
+}
 
 namespace Agi {
 
diff --git a/engines/agi/sound_midi.cpp b/engines/agi/sound_midi.cpp
index f5c48b3..6998df6 100644
--- a/engines/agi/sound_midi.cpp
+++ b/engines/agi/sound_midi.cpp
@@ -46,7 +46,6 @@
 #include "common/file.h"
 #include "common/memstream.h"
 #include "common/stream.h"
-#include "common/textconsole.h"
 
 #include "agi/agi.h"
 
diff --git a/engines/agi/sound_sarien.cpp b/engines/agi/sound_sarien.cpp
index c8a7042..939c3d2 100644
--- a/engines/agi/sound_sarien.cpp
+++ b/engines/agi/sound_sarien.cpp
@@ -22,8 +22,6 @@
 
 #include "common/random.h"
 
-#include "audio/mididrv.h"
-
 #include "agi/agi.h"
 
 #include "agi/sound_sarien.h"
diff --git a/engines/avalanche/animation.cpp b/engines/avalanche/animation.cpp
index 451b4a1..6946e44 100644
--- a/engines/avalanche/animation.cpp
+++ b/engines/avalanche/animation.cpp
@@ -27,6 +27,7 @@
 
 /* TRIP5	Trippancy V - the sprite animation subsystem */
 
+#include "common/system.h"
 #include "avalanche/avalanche.h"
 #include "avalanche/animation.h"
 
diff --git a/engines/avalanche/avalanche.cpp b/engines/avalanche/avalanche.cpp
index 6cfe4df..8726ef7 100644
--- a/engines/avalanche/avalanche.cpp
+++ b/engines/avalanche/avalanche.cpp
@@ -29,6 +29,7 @@
 
 #include "common/random.h"
 #include "common/savefile.h"
+#include "common/system.h"
 #include "graphics/thumbnail.h"
 
 namespace Avalanche {
diff --git a/engines/avalanche/clock.cpp b/engines/avalanche/clock.cpp
index 6d398d9..4276e41 100644
--- a/engines/avalanche/clock.cpp
+++ b/engines/avalanche/clock.cpp
@@ -28,6 +28,8 @@
 #include "avalanche/clock.h"
 #include "avalanche/avalanche.h"
 
+#include "common/system.h"
+
 namespace Avalanche {
 
 Clock::Clock(AvalancheEngine *vm) {
diff --git a/engines/avalanche/dialogs.cpp b/engines/avalanche/dialogs.cpp
index f954409..d1a7234 100644
--- a/engines/avalanche/dialogs.cpp
+++ b/engines/avalanche/dialogs.cpp
@@ -30,6 +30,7 @@
 #include "avalanche/avalanche.h"
 #include "avalanche/dialogs.h"
 
+#include "common/system.h"
 #include "common/random.h"
 
 namespace Avalanche {
diff --git a/engines/avalanche/ghostroom.cpp b/engines/avalanche/ghostroom.cpp
index 047a367..254bf5e 100644
--- a/engines/avalanche/ghostroom.cpp
+++ b/engines/avalanche/ghostroom.cpp
@@ -29,6 +29,7 @@
 #include "avalanche/ghostroom.h"
 
 #include "common/random.h"
+#include "common/system.h"
 
 namespace Avalanche {
 
diff --git a/engines/avalanche/graphics.cpp b/engines/avalanche/graphics.cpp
index 60c2359..03c9e9e 100644
--- a/engines/avalanche/graphics.cpp
+++ b/engines/avalanche/graphics.cpp
@@ -28,6 +28,7 @@
 #include "avalanche/avalanche.h"
 #include "avalanche/graphics.h"
 
+#include "common/system.h"
 #include "engines/util.h"
 #include "graphics/palette.h"
 
diff --git a/engines/avalanche/highscore.cpp b/engines/avalanche/highscore.cpp
index 5f47aeb..b977e2f 100644
--- a/engines/avalanche/highscore.cpp
+++ b/engines/avalanche/highscore.cpp
@@ -29,6 +29,7 @@
 #include "avalanche/highscore.h"
 
 #include "common/savefile.h"
+#include "common/system.h"
 
 namespace Avalanche {
 
diff --git a/engines/avalanche/mainmenu.cpp b/engines/avalanche/mainmenu.cpp
index 5436845..ff24b37 100644
--- a/engines/avalanche/mainmenu.cpp
+++ b/engines/avalanche/mainmenu.cpp
@@ -28,6 +28,8 @@
 #include "avalanche/avalanche.h"
 #include "avalanche/mainmenu.h"
 
+#include "common/system.h"
+
 namespace Avalanche {
 
 MainMenu::MainMenu(AvalancheEngine *vm) {
diff --git a/engines/avalanche/nim.cpp b/engines/avalanche/nim.cpp
index b17af87..a0a1756 100644
--- a/engines/avalanche/nim.cpp
+++ b/engines/avalanche/nim.cpp
@@ -28,6 +28,8 @@
 #include "avalanche/avalanche.h"
 #include "avalanche/nim.h"
 
+#include "common/system.h"
+
 namespace Avalanche {
 
 const char * const Nim::kNames[2] = {"Avalot", "Dogfood"};
diff --git a/engines/avalanche/parser.cpp b/engines/avalanche/parser.cpp
index 7c6d254..112dce9 100644
--- a/engines/avalanche/parser.cpp
+++ b/engines/avalanche/parser.cpp
@@ -30,6 +30,7 @@
 #include "avalanche/nim.h"
 
 #include "gui/saveload.h"
+#include "common/system.h"
 #include "common/translation.h"
 
 namespace Avalanche {
diff --git a/engines/avalanche/shootemup.cpp b/engines/avalanche/shootemup.cpp
index e5e44ed..7f6cf99 100644
--- a/engines/avalanche/shootemup.cpp
+++ b/engines/avalanche/shootemup.cpp
@@ -29,6 +29,7 @@
 #include "avalanche/shootemup.h"
 
 #include "common/random.h"
+#include "common/system.h"
 
 namespace Avalanche {
 
diff --git a/engines/avalanche/sound.cpp b/engines/avalanche/sound.cpp
index 0223bea..a441121 100644
--- a/engines/avalanche/sound.cpp
+++ b/engines/avalanche/sound.cpp
@@ -23,7 +23,7 @@
 #include "avalanche/avalanche.h"
 #include "avalanche/sound.h"
 
-#include "audio/audiostream.h"
+#include "audio/softsynth/pcspk.h"
 #include "common/config-manager.h"
 
 namespace Avalanche {
diff --git a/engines/avalanche/sound.h b/engines/avalanche/sound.h
index a67016a..f977565 100644
--- a/engines/avalanche/sound.h
+++ b/engines/avalanche/sound.h
@@ -24,7 +24,10 @@
 #define AVALANCHE_SOUND_H
 
 #include "audio/mixer.h"
-#include "audio/softsynth/pcspk.h"
+
+namespace Audio {
+class PCSpeaker;
+}
 
 namespace Avalanche {
 
diff --git a/engines/bbvs/bbvs.cpp b/engines/bbvs/bbvs.cpp
index 6ae6634..e7b2051 100644
--- a/engines/bbvs/bbvs.cpp
+++ b/engines/bbvs/bbvs.cpp
@@ -34,6 +34,7 @@
 #include "bbvs/minigames/minigame.h"
 
 #include "audio/audiostream.h"
+#include "audio/decoders/aiff.h"
 #include "common/config-manager.h"
 #include "common/debug-channels.h"
 #include "common/error.h"
diff --git a/engines/bbvs/bbvs.h b/engines/bbvs/bbvs.h
index ff4afe9..8d9550d 100644
--- a/engines/bbvs/bbvs.h
+++ b/engines/bbvs/bbvs.h
@@ -24,7 +24,6 @@
 #define BBVS_BBVS_H
 
 #include "audio/mixer.h"
-#include "audio/decoders/aiff.h"
 #include "common/array.h"
 #include "common/events.h"
 #include "common/file.h"
diff --git a/engines/bbvs/sound.cpp b/engines/bbvs/sound.cpp
index 7f9c00a..587868f 100644
--- a/engines/bbvs/sound.cpp
+++ b/engines/bbvs/sound.cpp
@@ -21,6 +21,7 @@
  */
 
 #include "bbvs/sound.h"
+#include "audio/audiostream.h"
 #include "audio/decoders/aiff.h"
 #include "common/debug.h"
 #include "common/file.h"
diff --git a/engines/bbvs/sound.h b/engines/bbvs/sound.h
index 4d3253c..a21d97b 100644
--- a/engines/bbvs/sound.h
+++ b/engines/bbvs/sound.h
@@ -23,10 +23,13 @@
 #ifndef BBVS_SOUND_H
 #define BBVS_SOUND_H
 
-#include "audio/audiostream.h"
 #include "audio/mixer.h"
 #include "common/array.h"
 
+namespace Audio {
+class RewindableAudioStream;
+}
+
 namespace Bbvs {
 
 class Sound {
diff --git a/engines/cge/sound.cpp b/engines/cge/sound.cpp
index 370b768..3af094e 100644
--- a/engines/cge/sound.cpp
+++ b/engines/cge/sound.cpp
@@ -30,8 +30,10 @@
 #include "cge/cge_main.h"
 #include "common/config-manager.h"
 #include "common/memstream.h"
-#include "audio/decoders/raw.h"
 #include "audio/audiostream.h"
+#include "audio/decoders/wave.h"
+#include "audio/mididrv.h"
+#include "audio/midiparser.h"
 
 namespace CGE {
 
diff --git a/engines/cge/sound.h b/engines/cge/sound.h
index dc67f94..8e624ee 100644
--- a/engines/cge/sound.h
+++ b/engines/cge/sound.h
@@ -29,15 +29,14 @@
 #define CGE_SOUND_H
 
 #include "cge/fileio.h"
-#include "audio/audiostream.h"
-#include "audio/decoders/wave.h"
-#include "audio/fmopl.h"
-#include "audio/mididrv.h"
-#include "audio/midiparser.h"
 #include "audio/midiplayer.h"
 #include "audio/mixer.h"
 #include "common/memstream.h"
 
+namespace Audio {
+class RewindableAudioStream;
+}
+
 namespace CGE {
 
 class CGEEngine;
diff --git a/engines/cge2/saveload.cpp b/engines/cge2/saveload.cpp
index 7735c07..cd0be84 100644
--- a/engines/cge2/saveload.cpp
+++ b/engines/cge2/saveload.cpp
@@ -25,7 +25,7 @@
  * Copyright (c) 1994-1997 Janus B. Wisniewski and L.K. Avalon
  */
 
-#include "common/config-manager.h"
+#include "common/memstream.h"
 #include "common/savefile.h"
 #include "common/system.h"
 #include "graphics/thumbnail.h"
@@ -36,8 +36,6 @@
 #include "cge2/snail.h"
 #include "cge2/hero.h"
 #include "cge2/text.h"
-#include "cge2/sound.h"
-#include "cge2/cge2_main.h"
 
 namespace CGE2 {
 
diff --git a/engines/cge2/sound.cpp b/engines/cge2/sound.cpp
index 57ec598..691414d 100644
--- a/engines/cge2/sound.cpp
+++ b/engines/cge2/sound.cpp
@@ -26,10 +26,11 @@
  */
 
 #include "cge2/sound.h"
-#include "common/config-manager.h"
 #include "common/memstream.h"
-#include "audio/decoders/raw.h"
 #include "audio/audiostream.h"
+#include "audio/decoders/wave.h"
+#include "audio/mididrv.h"
+#include "audio/midiparser.h"
 #include "cge2/cge2.h"
 
 namespace CGE2 {
diff --git a/engines/cge2/sound.h b/engines/cge2/sound.h
index 02afe61..8c16f06 100644
--- a/engines/cge2/sound.h
+++ b/engines/cge2/sound.h
@@ -28,19 +28,17 @@
 #ifndef CGE2_SOUND_H
 #define CGE2_SOUND_H
 
-#include "cge2/fileio.h"
-#include "audio/audiostream.h"
-#include "audio/decoders/wave.h"
-#include "audio/fmopl.h"
-#include "audio/mididrv.h"
-#include "audio/midiparser.h"
 #include "audio/midiplayer.h"
 #include "audio/mixer.h"
-#include "common/memstream.h"
+
+namespace Audio {
+class RewindableAudioStream;
+}
 
 namespace CGE2 {
 
 class CGE2Engine;
+class EncryptedStream;
 
 // sample info
 struct SmpInfo {
diff --git a/engines/composer/composer.cpp b/engines/composer/composer.cpp
index f070338..73d97e1 100644
--- a/engines/composer/composer.cpp
+++ b/engines/composer/composer.cpp
@@ -21,13 +21,9 @@
  */
 #include "common/scummsys.h"
 
-#include "common/config-manager.h"
 #include "common/events.h"
-#include "common/file.h"
 #include "common/random.h"
-#include "common/fs.h"
 #include "common/keyboard.h"
-#include "common/substream.h"
 
 #include "graphics/cursorman.h"
 #include "graphics/surface.h"
@@ -35,9 +31,6 @@
 #include "graphics/wincursor.h"
 
 #include "engines/util.h"
-#include "engines/advancedDetector.h"
-
-#include "audio/audiostream.h"
 
 #include "composer/composer.h"
 #include "composer/graphics.h"
diff --git a/engines/composer/composer.h b/engines/composer/composer.h
index 47398fe..234494e 100644
--- a/engines/composer/composer.h
+++ b/engines/composer/composer.h
@@ -28,6 +28,7 @@
 #include "common/system.h"
 #include "common/debug.h"
 #include "common/debug-channels.h"
+#include "common/error.h"
 #include "common/textconsole.h"
 #include "common/rect.h"
 
diff --git a/engines/cruise/sound.cpp b/engines/cruise/sound.cpp
index f57435f..b477dcd 100644
--- a/engines/cruise/sound.cpp
+++ b/engines/cruise/sound.cpp
@@ -29,10 +29,11 @@
 #include "cruise/sound.h"
 #include "cruise/volume.h"
 
-#include "audio/audiostream.h"
 #include "audio/fmopl.h"
-#include "audio/mixer.h"
-#include "audio/mods/soundfx.h"
+
+namespace Audio {
+class Mixer;
+}
 
 namespace Cruise {
 
diff --git a/engines/draci/music.cpp b/engines/draci/music.cpp
index cda2007..3fa3801 100644
--- a/engines/draci/music.cpp
+++ b/engines/draci/music.cpp
@@ -22,10 +22,8 @@
 
 // MIDI and digital music class
 
-#include "audio/audiostream.h"
 #include "audio/mididrv.h"
 #include "audio/midiparser.h"
-#include "common/config-manager.h"
 #include "common/debug.h"
 #include "common/file.h"
 
diff --git a/engines/drascula/drascula.cpp b/engines/drascula/drascula.cpp
index c2ea761..75a81c2 100644
--- a/engines/drascula/drascula.cpp
+++ b/engines/drascula/drascula.cpp
@@ -23,19 +23,13 @@
 #include "common/events.h"
 #include "common/keyboard.h"
 #include "common/file.h"
-#include "common/savefile.h"
 #include "common/config-manager.h"
 #include "common/textconsole.h"
 
 #include "backends/audiocd/audiocd.h"
 
-#include "base/plugins.h"
-#include "base/version.h"
-
 #include "engines/util.h"
 
-#include "audio/mixer.h"
-
 #include "drascula/drascula.h"
 #include "drascula/console.h"
 
diff --git a/engines/dreamweb/detection.cpp b/engines/dreamweb/detection.cpp
index 764171b..8e24c44 100644
--- a/engines/dreamweb/detection.cpp
+++ b/engines/dreamweb/detection.cpp
@@ -23,6 +23,7 @@
 #include "base/plugins.h"
 
 #include "common/algorithm.h"
+#include "common/savefile.h"
 #include "common/system.h"
 #include "common/translation.h"
 
diff --git a/engines/dreamweb/dreamweb.h b/engines/dreamweb/dreamweb.h
index e39f8c0..2e5fb42 100644
--- a/engines/dreamweb/dreamweb.h
+++ b/engines/dreamweb/dreamweb.h
@@ -24,17 +24,12 @@
 #define DREAMWEB_H
 
 #include "common/error.h"
-#include "common/file.h"
 #include "common/keyboard.h"
 #include "common/random.h"
 #include "common/rect.h"
-#include "common/savefile.h"
 #include "common/scummsys.h"
 #include "common/system.h"
 
-#include "audio/audiostream.h"
-#include "audio/mixer.h"
-
 #include "engines/engine.h"
 
 #include "dreamweb/console.h"
@@ -45,6 +40,10 @@
 #define SCUMMVM_BLOCK_MAGIC_SIZE 0x1234
 #define SAVEGAME_VERSION 1
 
+namespace Common {
+class File;
+}
+
 namespace DreamWeb {
 
 const unsigned int kNumReelRoutines = 57;
diff --git a/engines/dreamweb/saveload.cpp b/engines/dreamweb/saveload.cpp
index ce89dae..a104ba7 100644
--- a/engines/dreamweb/saveload.cpp
+++ b/engines/dreamweb/saveload.cpp
@@ -28,6 +28,7 @@
 #include "gui/saveload.h"
 #include "common/config-manager.h"
 #include "common/translation.h"
+#include "common/savefile.h"
 #include "common/serializer.h"
 
 namespace DreamWeb {
diff --git a/engines/dreamweb/sound.cpp b/engines/dreamweb/sound.cpp
index d3b417d..2a4cd9c 100644
--- a/engines/dreamweb/sound.cpp
+++ b/engines/dreamweb/sound.cpp
@@ -25,6 +25,8 @@
 #include "common/debug.h"
 #include "common/file.h"
 
+#include "audio/audiostream.h"
+
 #include "dreamweb/dreamweb.h"
 #include "dreamweb/sound.h"
 
diff --git a/engines/dreamweb/stubs.cpp b/engines/dreamweb/stubs.cpp
index 68b2233..4aa487d 100644
--- a/engines/dreamweb/stubs.cpp
+++ b/engines/dreamweb/stubs.cpp
@@ -23,6 +23,7 @@
 #include "dreamweb/sound.h"
 #include "dreamweb/dreamweb.h"
 #include "common/config-manager.h"
+#include "common/file.h"
 
 namespace DreamWeb {
 
diff --git a/engines/dreamweb/vgagrafx.cpp b/engines/dreamweb/vgagrafx.cpp
index c59d3e3..4a7acd2 100644
--- a/engines/dreamweb/vgagrafx.cpp
+++ b/engines/dreamweb/vgagrafx.cpp
@@ -21,6 +21,7 @@
  */
 
 #include "dreamweb/dreamweb.h"
+#include "common/file.h"
 #include "engines/util.h"
 #include "graphics/surface.h"
 #include "image/pcx.h"
diff --git a/engines/gob/inter_v2.cpp b/engines/gob/inter_v2.cpp
index 3aa7ad1..4b58819 100644
--- a/engines/gob/inter_v2.cpp
+++ b/engines/gob/inter_v2.cpp
@@ -26,9 +26,6 @@
 
 #include "gui/message.h"
 
-#include "audio/mixer.h"
-#include "audio/mods/infogrames.h"
-
 #include "gob/gob.h"
 #include "gob/inter.h"
 #include "gob/global.h"
diff --git a/engines/gob/sound/adlib.h b/engines/gob/sound/adlib.h
index d604582..9d6b305 100644
--- a/engines/gob/sound/adlib.h
+++ b/engines/gob/sound/adlib.h
@@ -25,7 +25,6 @@
 
 #include "common/mutex.h"
 
-#include "audio/audiostream.h"
 #include "audio/mixer.h"
 
 namespace OPL {
diff --git a/engines/gob/sound/bgatmosphere.h b/engines/gob/sound/bgatmosphere.h
index 1cfc63c..c838a2c 100644
--- a/engines/gob/sound/bgatmosphere.h
+++ b/engines/gob/sound/bgatmosphere.h
@@ -23,13 +23,16 @@
 #ifndef GOB_SOUND_BGATMOSPHERE_H
 #define GOB_SOUND_BGATMOSPHERE_H
 
-#include "audio/mixer.h"
 #include "common/array.h"
 #include "common/mutex.h"
 #include "common/random.h"
 
 #include "gob/sound/soundmixer.h"
 
+namespace Audio {
+class Mixer;
+}
+
 namespace Gob {
 
 class SoundDesc;
diff --git a/engines/gob/sound/pcspeaker.cpp b/engines/gob/sound/pcspeaker.cpp
index d0dcb9a..7ba9fa7 100644
--- a/engines/gob/sound/pcspeaker.cpp
+++ b/engines/gob/sound/pcspeaker.cpp
@@ -20,6 +20,7 @@
  *
  */
 
+#include "audio/softsynth/pcspk.h"
 #include "gob/sound/pcspeaker.h"
 
 namespace Gob {
diff --git a/engines/gob/sound/pcspeaker.h b/engines/gob/sound/pcspeaker.h
index ba2e00c..2c3a12a 100644
--- a/engines/gob/sound/pcspeaker.h
+++ b/engines/gob/sound/pcspeaker.h
@@ -24,7 +24,10 @@
 #define GOB_SOUND_PCSPEAKER_H
 
 #include "audio/mixer.h"
-#include "audio/softsynth/pcspk.h"
+
+namespace Audio {
+class PCSpeaker;
+}
 
 namespace Gob {
 
diff --git a/engines/gob/sound/protracker.cpp b/engines/gob/sound/protracker.cpp
index ce29100..7cf8dbb 100644
--- a/engines/gob/sound/protracker.cpp
+++ b/engines/gob/sound/protracker.cpp
@@ -22,6 +22,7 @@
 
 #include "common/file.h"
 
+#include "audio/audiostream.h"
 #include "audio/mods/protracker.h"
 
 #include "gob/sound/protracker.h"
diff --git a/engines/gob/sound/protracker.h b/engines/gob/sound/protracker.h
index ccd0d51..17d9093 100644
--- a/engines/gob/sound/protracker.h
+++ b/engines/gob/sound/protracker.h
@@ -24,7 +24,10 @@
 #define GOB_SOUND_PROTRACKER_H
 
 #include "audio/mixer.h"
-#include "audio/audiostream.h"
+
+namespace Audio {
+class AudioStream;
+}
 
 namespace Gob {
 
diff --git a/engines/gob/sound/soundblaster.h b/engines/gob/sound/soundblaster.h
index 6a732db..8abed62 100644
--- a/engines/gob/sound/soundblaster.h
+++ b/engines/gob/sound/soundblaster.h
@@ -24,10 +24,13 @@
 #define GOB_SOUND_SOUNDBLASTER_H
 
 #include "common/mutex.h"
-#include "audio/mixer.h"
 
 #include "gob/sound/soundmixer.h"
 
+namespace Audio {
+class Mixer;
+}
+
 namespace Gob {
 
 class SoundDesc;
diff --git a/engines/gob/sound/sounddesc.cpp b/engines/gob/sound/sounddesc.cpp
index f981d0b..d563870 100644
--- a/engines/gob/sound/sounddesc.cpp
+++ b/engines/gob/sound/sounddesc.cpp
@@ -24,7 +24,6 @@
 #include "common/memstream.h"
 #include "common/textconsole.h"
 
-#include "audio/mixer.h"
 #include "audio/decoders/raw.h"
 #include "audio/decoders/wave.h"
 
diff --git a/engines/groovie/groovie.cpp b/engines/groovie/groovie.cpp
index bbc290e..ac77ec3 100644
--- a/engines/groovie/groovie.cpp
+++ b/engines/groovie/groovie.cpp
@@ -20,9 +20,6 @@
  *
  */
 
-#include "audio/mididrv.h"
-#include "audio/mixer.h"
-
 #include "groovie/groovie.h"
 #include "groovie/cursor.h"
 #include "groovie/detection.h"
diff --git a/engines/groovie/music.h b/engines/groovie/music.h
index dcb91d4..c549527 100644
--- a/engines/groovie/music.h
+++ b/engines/groovie/music.h
@@ -25,6 +25,8 @@
 
 #include "common/array.h"
 #include "common/mutex.h"
+#include "audio/mididrv.h"
+#include "audio/mixer.h"
 
 class MidiParser;
 
diff --git a/engines/groovie/player.cpp b/engines/groovie/player.cpp
index c1b90fb..dea3238 100644
--- a/engines/groovie/player.cpp
+++ b/engines/groovie/player.cpp
@@ -21,6 +21,7 @@
  */
 
 #include "common/debug.h"
+#include "audio/audiostream.h"
 
 #include "groovie/player.h"
 #include "groovie/groovie.h"
diff --git a/engines/groovie/player.h b/engines/groovie/player.h
index b1aac96..952d3ac 100644
--- a/engines/groovie/player.h
+++ b/engines/groovie/player.h
@@ -24,7 +24,10 @@
 #define GROOVIE_PLAYER_H
 
 #include "common/system.h"
-#include "audio/audiostream.h"
+
+namespace Audio {
+class QueuingAudioStream;
+}
 
 namespace Groovie {
 
diff --git a/engines/groovie/roq.cpp b/engines/groovie/roq.cpp
index f14cacd..c1b6c44 100644
--- a/engines/groovie/roq.cpp
+++ b/engines/groovie/roq.cpp
@@ -40,6 +40,7 @@
 // Required for the YUV to RGB conversion
 #include "graphics/conversion.h"
 #endif
+#include "audio/audiostream.h"
 #include "audio/mixer.h"
 #include "audio/decoders/raw.h"
 
diff --git a/engines/groovie/script.cpp b/engines/groovie/script.cpp
index eef97b6..47fdaac 100644
--- a/engines/groovie/script.cpp
+++ b/engines/groovie/script.cpp
@@ -21,7 +21,6 @@
  */
 
 #include "audio/mididrv.h"
-#include "audio/mixer.h"
 
 #include "groovie/script.h"
 #include "groovie/cell.h"
diff --git a/engines/groovie/vdx.cpp b/engines/groovie/vdx.cpp
index 09c2e0d..94b6aa0 100644
--- a/engines/groovie/vdx.cpp
+++ b/engines/groovie/vdx.cpp
@@ -28,6 +28,7 @@
 #include "common/debug.h"
 #include "common/debug-channels.h"
 #include "common/textconsole.h"
+#include "audio/audiostream.h"
 #include "audio/mixer.h"
 #include "audio/decoders/raw.h"
 #include "graphics/palette.h"
diff --git a/engines/hopkins/sound.cpp b/engines/hopkins/sound.cpp
index 6660233..3030636 100644
--- a/engines/hopkins/sound.cpp
+++ b/engines/hopkins/sound.cpp
@@ -26,6 +26,8 @@
 #include "hopkins/hopkins.h"
 
 #include "audio/decoders/adpcm_intern.h"
+#include "audio/decoders/wave.h"
+#include "audio/softsynth/pcspk.h"
 #include "common/system.h"
 #include "common/config-manager.h"
 #include "common/file.h"
diff --git a/engines/hopkins/sound.h b/engines/hopkins/sound.h
index 1fb4f9a..49c5846 100644
--- a/engines/hopkins/sound.h
+++ b/engines/hopkins/sound.h
@@ -25,10 +25,16 @@
 
 #include "common/scummsys.h"
 #include "common/str.h"
-#include "audio/audiostream.h"
-#include "audio/decoders/wave.h"
 #include "audio/mixer.h"
 
+namespace Audio {
+class RewindableAudioStream;
+}
+
+namespace Common {
+class SeekableReadStream;
+}
+
 namespace Hopkins {
 
 class VoiceItem {
diff --git a/engines/hugo/sound.cpp b/engines/hugo/sound.cpp
index 8591709..09de256 100644
--- a/engines/hugo/sound.cpp
+++ b/engines/hugo/sound.cpp
@@ -37,6 +37,7 @@
 #include "audio/decoders/raw.h"
 #include "audio/audiostream.h"
 #include "audio/midiparser.h"
+#include "audio/softsynth/pcspk.h"
 
 #include "hugo/hugo.h"
 #include "hugo/game.h"
diff --git a/engines/hugo/sound.h b/engines/hugo/sound.h
index 6c34209..a623569 100644
--- a/engines/hugo/sound.h
+++ b/engines/hugo/sound.h
@@ -32,7 +32,10 @@
 
 #include "audio/mixer.h"
 #include "audio/midiplayer.h"
-#include "audio/softsynth/pcspk.h"
+
+namespace Audio {
+class PCSpeaker;
+}
 
 namespace Hugo {
 
diff --git a/engines/kyra/eobcommon.cpp b/engines/kyra/eobcommon.cpp
index 38a5ab8..2264d99 100644
--- a/engines/kyra/eobcommon.cpp
+++ b/engines/kyra/eobcommon.cpp
@@ -24,7 +24,8 @@
 
 #include "kyra/kyra_rpg.h"
 #include "kyra/resource.h"
-#include "kyra/sound_intern.h"
+#include "engines/kyra/sound.h"
+#include "engines/kyra/sound_adlib.h"
 #include "kyra/script_eob.h"
 #include "kyra/timer.h"
 #include "kyra/debugger.h"
@@ -32,9 +33,6 @@
 #include "common/config-manager.h"
 #include "common/translation.h"
 
-#include "audio/mididrv.h"
-#include "audio/mixer.h"
-
 #include "backends/keymapper/keymapper.h"
 
 namespace Kyra {
diff --git a/engines/kyra/sound_adlib.cpp b/engines/kyra/sound_adlib.cpp
index 1d741d8..1703fb9 100644
--- a/engines/kyra/sound_adlib.cpp
+++ b/engines/kyra/sound_adlib.cpp
@@ -44,15 +44,17 @@
 #include "common/mutex.h"
 #include "common/config-manager.h"
 
-#include "audio/mixer.h"
 #include "audio/fmopl.h"
-#include "audio/audiostream.h"
 
 // Basic AdLib Programming:
 // http://www.gamedev.net/reference/articles/article446.asp
 
 #define CALLBACKS_PER_SECOND 72
 
+namespace Audio {
+class Mixer;
+}
+
 namespace Kyra {
 
 class AdLibDriver {
diff --git a/engines/lab/anim.cpp b/engines/lab/anim.cpp
index f2e6992..1190f03 100644
--- a/engines/lab/anim.cpp
+++ b/engines/lab/anim.cpp
@@ -28,6 +28,8 @@
  *
  */
 
+#include "common/file.h"
+
 #include "lab/lab.h"
 
 #include "lab/anim.h"
diff --git a/engines/lab/dispman.cpp b/engines/lab/dispman.cpp
index af235f2..d642f2f 100644
--- a/engines/lab/dispman.cpp
+++ b/engines/lab/dispman.cpp
@@ -28,6 +28,7 @@
  *
  */
 
+#include "common/file.h"
 #include "graphics/palette.h"
 
 #include "lab/lab.h"
diff --git a/engines/lab/engine.cpp b/engines/lab/engine.cpp
index 6ba4053..4f0a0da 100644
--- a/engines/lab/engine.cpp
+++ b/engines/lab/engine.cpp
@@ -29,6 +29,7 @@
  */
 
 #include "common/config-manager.h"
+#include "common/file.h"
 
 #include "gui/message.h"
 
diff --git a/engines/lab/intro.cpp b/engines/lab/intro.cpp
index 01e8cac..0184ff7 100644
--- a/engines/lab/intro.cpp
+++ b/engines/lab/intro.cpp
@@ -28,6 +28,8 @@
  *
  */
 
+#include "common/file.h"
+
 #include "lab/lab.h"
 
 #include "lab/anim.h"
diff --git a/engines/lab/lab.cpp b/engines/lab/lab.cpp
index 9b0ebfc..39b2feb 100644
--- a/engines/lab/lab.cpp
+++ b/engines/lab/lab.cpp
@@ -31,6 +31,7 @@
 #include "common/config-manager.h"
 #include "common/debug-channels.h"
 #include "common/error.h"
+#include "common/file.h"
 
 #include "engines/util.h"
 
diff --git a/engines/lab/map.cpp b/engines/lab/map.cpp
index 5c6bb07..057cac3 100644
--- a/engines/lab/map.cpp
+++ b/engines/lab/map.cpp
@@ -28,6 +28,8 @@
  *
  */
 
+#include "common/file.h"
+
 #include "lab/lab.h"
 
 #include "lab/dispman.h"
diff --git a/engines/lab/music.cpp b/engines/lab/music.cpp
index b58d6dc..579f450 100644
--- a/engines/lab/music.cpp
+++ b/engines/lab/music.cpp
@@ -28,6 +28,8 @@
  *
  */
 
+#include "common/file.h"
+#include "audio/audiostream.h"
 #include "audio/decoders/raw.h"
 
 #include "lab/lab.h"
diff --git a/engines/lab/music.h b/engines/lab/music.h
index 472fe4f..8175e35 100644
--- a/engines/lab/music.h
+++ b/engines/lab/music.h
@@ -31,9 +31,11 @@
 #ifndef LAB_MUSIC_H
 #define LAB_MUSIC_H
 
-#include "common/file.h"
 #include "audio/mixer.h"
-#include "audio/audiostream.h"
+
+namespace Common {
+class File;
+}
 
 namespace Lab {
 
diff --git a/engines/lab/resource.cpp b/engines/lab/resource.cpp
index aae369f..9cb35d1 100644
--- a/engines/lab/resource.cpp
+++ b/engines/lab/resource.cpp
@@ -28,6 +28,8 @@
  *
  */
 
+#include "common/file.h"
+
 #include "lab/lab.h"
 
 #include "lab/dispman.h"
diff --git a/engines/lab/special.cpp b/engines/lab/special.cpp
index 9f9b993..7c3cb39 100644
--- a/engines/lab/special.cpp
+++ b/engines/lab/special.cpp
@@ -28,6 +28,8 @@
  *
  */
 
+#include "common/file.h"
+
 #include "lab/lab.h"
 
 #include "lab/anim.h"
diff --git a/engines/lure/lure.h b/engines/lure/lure.h
index b6eb912..af00197 100644
--- a/engines/lure/lure.h
+++ b/engines/lure/lure.h
@@ -25,7 +25,6 @@
 
 #include "engines/engine.h"
 #include "common/rect.h"
-#include "audio/mixer.h"
 #include "common/file.h"
 #include "common/savefile.h"
 #include "common/util.h"
diff --git a/engines/mads/nebular/sound_nebular.cpp b/engines/mads/nebular/sound_nebular.cpp
index 4c360b2..5f71c99 100644
--- a/engines/mads/nebular/sound_nebular.cpp
+++ b/engines/mads/nebular/sound_nebular.cpp
@@ -20,16 +20,15 @@
  *
  */
 
-#include "audio/audiostream.h"
 #include "audio/fmopl.h"
-#include "audio/decoders/raw.h"
 #include "common/algorithm.h"
-#include "common/debug.h"
 #include "common/md5.h"
-#include "common/memstream.h"
-#include "mads/sound.h"
 #include "mads/nebular/sound_nebular.h"
 
+namespace Audio {
+class Mixer;
+}
+
 namespace MADS {
 
 namespace Nebular {
diff --git a/engines/mads/nebular/sound_nebular.h b/engines/mads/nebular/sound_nebular.h
index 2b80b08..a9e1493 100644
--- a/engines/mads/nebular/sound_nebular.h
+++ b/engines/mads/nebular/sound_nebular.h
@@ -27,8 +27,14 @@
 #include "common/file.h"
 #include "common/mutex.h"
 #include "common/queue.h"
-#include "audio/audiostream.h"
-#include "audio/mixer.h"
+
+namespace Audio {
+class Mixer;
+}
+
+namespace Common {
+class SeekableReadStream;
+}
 
 namespace OPL {
 class OPL;
@@ -36,8 +42,6 @@ class OPL;
 
 namespace MADS {
 
-class SoundManager;
-
 namespace Nebular {
 
 class ASound;
diff --git a/engines/mads/sound.cpp b/engines/mads/sound.cpp
index c96fd01..5f2c9ac 100644
--- a/engines/mads/sound.cpp
+++ b/engines/mads/sound.cpp
@@ -20,14 +20,16 @@
  *
  */
 
-#include "audio/audiostream.h"
 #include "audio/fmopl.h"
-#include "audio/decoders/raw.h"
 #include "common/memstream.h"
 #include "mads/sound.h"
 #include "mads/mads.h"
 #include "mads/nebular/sound_nebular.h"
 
+namespace Audio {
+class Mixer;
+}
+
 namespace MADS {
 
 SoundManager::SoundManager(MADSEngine *vm, Audio::Mixer *mixer) {
diff --git a/engines/mads/sound.h b/engines/mads/sound.h
index 2c4de6f..9674d41 100644
--- a/engines/mads/sound.h
+++ b/engines/mads/sound.h
@@ -25,12 +25,21 @@
 
 #include "common/scummsys.h"
 #include "common/queue.h"
-#include "audio/audiostream.h"
-#include "audio/mixer.h"
-#include "mads/nebular/sound_nebular.h"
+
+namespace Audio {
+class Mixer;
+}
+
+namespace OPL {
+class OPL;
+}
 
 namespace MADS {
 
+namespace Nebular {
+class ASound;
+}
+
 class MADSEngine;
 
 class SoundManager {
diff --git a/engines/mohawk/sound.cpp b/engines/mohawk/sound.cpp
index a2c08d4..38cb0b3 100644
--- a/engines/mohawk/sound.cpp
+++ b/engines/mohawk/sound.cpp
@@ -23,12 +23,12 @@
 #include "common/debug.h"
 #include "common/events.h"
 #include "common/system.h"
-#include "common/util.h"
 #include "common/textconsole.h"
 
+#include "audio/mididrv.h"
 #include "audio/midiparser.h"
-#include "audio/musicplugin.h"
 #include "audio/audiostream.h"
+#include "audio/decoders/adpcm.h"
 #include "audio/decoders/mp3.h"
 #include "audio/decoders/raw.h"
 #include "audio/decoders/wave.h"
diff --git a/engines/mohawk/sound.h b/engines/mohawk/sound.h
index c62e6e9..f09706e 100644
--- a/engines/mohawk/sound.h
+++ b/engines/mohawk/sound.h
@@ -26,9 +26,7 @@
 #include "common/scummsys.h"
 #include "common/str.h"
 
-#include "audio/audiostream.h"
 #include "audio/mixer.h"
-#include "audio/decoders/adpcm.h"
 
 #include "mohawk/mohawk.h"
 #include "mohawk/resource.h"
@@ -36,6 +34,10 @@
 class MidiDriver;
 class MidiParser;
 
+namespace Audio {
+class RewindableAudioStream;
+}
+
 namespace Mohawk {
 
 #define MAX_CHANNELS 2         // Can there be more than 2?
diff --git a/engines/mortevielle/sound.cpp b/engines/mortevielle/sound.cpp
index f02ccb6..77eba4c 100644
--- a/engines/mortevielle/sound.cpp
+++ b/engines/mortevielle/sound.cpp
@@ -28,6 +28,7 @@
 #include "mortevielle/mortevielle.h"
 #include "mortevielle/sound.h"
 
+#include "audio/audiostream.h"
 #include "audio/decoders/raw.h"
 #include "common/scummsys.h"
 
diff --git a/engines/mortevielle/sound.h b/engines/mortevielle/sound.h
index d913684..15b4667 100644
--- a/engines/mortevielle/sound.h
+++ b/engines/mortevielle/sound.h
@@ -28,11 +28,14 @@
 #ifndef MORTEVIELLE_SOUND_H
 #define MORTEVIELLE_SOUND_H
 
-#include "audio/audiostream.h"
 #include "audio/mixer.h"
 #include "common/mutex.h"
 #include "common/queue.h"
 
+namespace Audio {
+class QueuingAudioStream;
+}
+
 namespace Mortevielle {
 class MortevielleEngine;
 
diff --git a/engines/neverhood/neverhood.h b/engines/neverhood/neverhood.h
index 0661bcb..9eac4ff 100644
--- a/engines/neverhood/neverhood.h
+++ b/engines/neverhood/neverhood.h
@@ -30,7 +30,6 @@
 #include "common/savefile.h"
 #include "common/str-array.h"
 #include "common/system.h"
-#include "audio/mixer.h"
 #include "engines/engine.h"
 #include "gui/debugger.h"
 #include "neverhood/console.h"
diff --git a/engines/neverhood/sound.h b/engines/neverhood/sound.h
index 512b0fe..24947f0 100644
--- a/engines/neverhood/sound.h
+++ b/engines/neverhood/sound.h
@@ -24,6 +24,7 @@
 #define NEVERHOOD_SOUND_H
 
 #include "audio/audiostream.h"
+#include "audio/mixer.h"
 #include "common/array.h"
 #include "graphics/surface.h"
 #include "neverhood/neverhood.h"
diff --git a/engines/prince/prince.cpp b/engines/prince/prince.cpp
index 55f12a6..b39d26e 100644
--- a/engines/prince/prince.cpp
+++ b/engines/prince/prince.cpp
@@ -41,6 +41,7 @@
 #include "engines/advancedDetector.h"
 
 #include "audio/audiostream.h"
+#include "audio/decoders/wave.h"
 
 #include "prince/prince.h"
 #include "prince/font.h"
diff --git a/engines/prince/sound.cpp b/engines/prince/sound.cpp
index 032297e..c974684 100644
--- a/engines/prince/sound.cpp
+++ b/engines/prince/sound.cpp
@@ -20,15 +20,13 @@
  *
  */
 
-#include "prince/prince.h"
 #include "prince/sound.h"
 #include "prince/musNum.h"
 
-#include "common/config-manager.h"
-#include "common/memstream.h"
 #include "common/archive.h"
-#include "audio/decoders/raw.h"
-#include "audio/audiostream.h"
+#include "common/debug.h"
+#include "audio/mididrv.h"
+#include "audio/midiparser.h"
 
 namespace Prince {
 
diff --git a/engines/prince/sound.h b/engines/prince/sound.h
index cc44b0a..4257a4a 100644
--- a/engines/prince/sound.h
+++ b/engines/prince/sound.h
@@ -23,13 +23,7 @@
 #ifndef PRINCE_SOUND_H
 #define PRINCE_SOUND_H
 
-#include "audio/audiostream.h"
-#include "audio/decoders/wave.h"
-#include "audio/fmopl.h"
-#include "audio/mididrv.h"
-#include "audio/midiparser.h"
 #include "audio/midiplayer.h"
-#include "audio/mixer.h"
 #include "common/memstream.h"
 
 namespace Prince {
diff --git a/engines/queen/sound.cpp b/engines/queen/sound.cpp
index 63e2445..d715d37 100644
--- a/engines/queen/sound.cpp
+++ b/engines/queen/sound.cpp
@@ -35,10 +35,10 @@
 
 #include "audio/audiostream.h"
 #include "audio/decoders/flac.h"
-#include "audio/mididrv.h"
 #include "audio/decoders/mp3.h"
 #include "audio/decoders/raw.h"
 #include "audio/decoders/vorbis.h"
+#include "audio/mods/rjp1.h"
 
 #define	SB_HEADER_SIZE_V104 110
 #define	SB_HEADER_SIZE_V110 122
diff --git a/engines/queen/sound.h b/engines/queen/sound.h
index d06d93b..f5d3970 100644
--- a/engines/queen/sound.h
+++ b/engines/queen/sound.h
@@ -23,10 +23,11 @@
 #ifndef QUEEN_SOUND_H
 #define QUEEN_SOUND_H
 
-#include "common/util.h"
 #include "audio/mixer.h"
-#include "audio/mods/rjp1.h"
-#include "queen/defs.h"
+
+namespace Audio {
+class AudioStream;
+}
 
 namespace Common {
 class File;
diff --git a/engines/saga/music.cpp b/engines/saga/music.cpp
index cd48eba..0bc1e8a 100644
--- a/engines/saga/music.cpp
+++ b/engines/saga/music.cpp
@@ -32,7 +32,10 @@
 #include "audio/midiparser.h"
 #include "audio/midiparser_qt.h"
 #include "audio/miles.h"
+#include "audio/decoders/flac.h"
+#include "audio/decoders/mp3.h"
 #include "audio/decoders/raw.h"
+#include "audio/decoders/vorbis.h"
 #include "common/config-manager.h"
 #include "common/file.h"
 #include "common/substream.h"
diff --git a/engines/saga/music.h b/engines/saga/music.h
index 2e7cc4c..0213f41 100644
--- a/engines/saga/music.h
+++ b/engines/saga/music.h
@@ -25,13 +25,10 @@
 #ifndef SAGA_MUSIC_H
 #define SAGA_MUSIC_H
 
+#include "audio/mididrv.h"
 #include "audio/midiplayer.h"
 #include "audio/midiparser.h"
 #include "audio/mixer.h"
-#include "audio/decoders/mp3.h"
-#include "audio/decoders/vorbis.h"
-#include "audio/decoders/flac.h"
-#include "common/mutex.h"
 
 namespace Saga {
 
diff --git a/engines/saga/shorten.cpp b/engines/saga/shorten.cpp
index 1e1c397..db67d51 100644
--- a/engines/saga/shorten.cpp
+++ b/engines/saga/shorten.cpp
@@ -21,7 +21,9 @@
  */
 
 #include "common/scummsys.h"
+#include "common/stream.h"
 #include "common/textconsole.h"
+#include "audio/audiostream.h"
 
 #include "saga/shorten.h"
 
diff --git a/engines/saga/shorten.h b/engines/saga/shorten.h
index 556abaf..4d4ec32 100644
--- a/engines/saga/shorten.h
+++ b/engines/saga/shorten.h
@@ -30,9 +30,14 @@
 #define SOUND_SHORTEN_H
 
 #include "common/scummsys.h"
-#include "common/stream.h"
 
-#include "audio/audiostream.h"
+namespace Audio {
+class AudioStream;
+}
+
+namespace Common {
+class ReadStream;
+}
 
 namespace Saga {
 
diff --git a/engines/saga/sound.cpp b/engines/saga/sound.cpp
index 0eb6f8a..f4e3154 100644
--- a/engines/saga/sound.cpp
+++ b/engines/saga/sound.cpp
@@ -27,8 +27,6 @@
 
 #include "audio/audiostream.h"
 #include "audio/mixer.h"
-#include "audio/decoders/adpcm.h"
-#include "audio/decoders/raw.h"
 
 namespace Saga {
 
diff --git a/engines/sci/sound/drivers/midi.cpp b/engines/sci/sound/drivers/midi.cpp
index aa464cd..5e82e4a 100644
--- a/engines/sci/sound/drivers/midi.cpp
+++ b/engines/sci/sound/drivers/midi.cpp
@@ -27,7 +27,7 @@
 #include "common/memstream.h"
 #include "common/system.h"
 
-#include "audio/fmopl.h"
+#include "audio/mididrv.h"
 
 #include "sci/resource.h"
 #include "sci/engine/features.h"
diff --git a/engines/sci/sound/music.h b/engines/sci/sound/music.h
index a610f32..047f63b 100644
--- a/engines/sci/sound/music.h
+++ b/engines/sci/sound/music.h
@@ -27,12 +27,16 @@
 #include "common/mutex.h"
 
 #include "audio/mixer.h"
-#include "audio/audiostream.h"
 
 #include "sci/sci.h"
 #include "sci/resource.h"
 #include "sci/sound/drivers/mididriver.h"
 
+namespace Audio {
+class LoopingAudioStream;
+class RewindableAudioStream;
+}
+
 namespace Sci {
 
 enum SoundStatus {
diff --git a/engines/sci/sound/soundcmd.cpp b/engines/sci/sound/soundcmd.cpp
index e7b25eb..fe33ea1 100644
--- a/engines/sci/sound/soundcmd.cpp
+++ b/engines/sci/sound/soundcmd.cpp
@@ -21,6 +21,8 @@
  */
 
 #include "common/config-manager.h"
+#include "audio/audiostream.h"
+#include "audio/mixer.h"
 #include "sci/sound/audio.h"
 #include "sci/sound/music.h"
 #include "sci/sound/soundcmd.h"
diff --git a/engines/scumm/dialogs.cpp b/engines/scumm/dialogs.cpp
index 178c6b7..8a6b545 100644
--- a/engines/scumm/dialogs.cpp
+++ b/engines/scumm/dialogs.cpp
@@ -43,8 +43,6 @@
 #include "scumm/imuse/imuse.h"
 #include "scumm/imuse_digi/dimuse.h"
 #include "scumm/verbs.h"
-#include "audio/mididrv.h"
-#include "audio/mixer.h"
 
 #ifndef DISABLE_HELP
 #include "scumm/help.h"
diff --git a/engines/scumm/he/animation_he.cpp b/engines/scumm/he/animation_he.cpp
index 8483a8a..0a3a56c 100644
--- a/engines/scumm/he/animation_he.cpp
+++ b/engines/scumm/he/animation_he.cpp
@@ -22,16 +22,21 @@
 
 #ifdef ENABLE_HE
 
+#include "common/scummsys.h"
+
 #include "scumm/he/animation_he.h"
 #include "scumm/he/intern_he.h"
 
-#include "audio/audiostream.h"
 #include "video/smk_decoder.h"
 
 #ifdef USE_BINK
 #include "video/bink_decoder.h"
 #endif
 
+namespace Audio {
+class Mixer;
+}
+
 namespace Scumm {
 
 MoviePlayer::MoviePlayer(ScummEngine_v90he *vm, Audio::Mixer *mixer) : _vm(vm) {
diff --git a/engines/scumm/he/animation_he.h b/engines/scumm/he/animation_he.h
index 677a4b4..6891ed8 100644
--- a/engines/scumm/he/animation_he.h
+++ b/engines/scumm/he/animation_he.h
@@ -23,7 +23,9 @@
 #if !defined(SCUMM_HE_ANIMATION_H) && defined(ENABLE_HE)
 #define SCUMM_HE_ANIMATION_H
 
-#include "audio/mixer.h"
+namespace Audio {
+class Mixer;
+}
 
 namespace Common {
 class String;
diff --git a/engines/scumm/he/sound_he.cpp b/engines/scumm/he/sound_he.cpp
index b806a9f..9a456b8 100644
--- a/engines/scumm/he/sound_he.cpp
+++ b/engines/scumm/he/sound_he.cpp
@@ -34,14 +34,10 @@
 #include "common/timer.h"
 #include "common/util.h"
 
+#include "audio/audiostream.h"
 #include "audio/decoders/adpcm.h"
-#include "audio/decoders/flac.h"
-#include "audio/mididrv.h"
 #include "audio/mixer.h"
-#include "audio/decoders/mp3.h"
 #include "audio/decoders/raw.h"
-#include "audio/decoders/voc.h"
-#include "audio/decoders/vorbis.h"
 #include "audio/decoders/wave.h"
 
 namespace Scumm {
diff --git a/engines/scumm/imuse_digi/dimuse.h b/engines/scumm/imuse_digi/dimuse.h
index f04c2f7..11b1ea6 100644
--- a/engines/scumm/imuse_digi/dimuse.h
+++ b/engines/scumm/imuse_digi/dimuse.h
@@ -34,8 +34,10 @@
 #include "scumm/music.h"
 #include "scumm/sound.h"
 
-#include "audio/mixer.h"
-#include "audio/audiostream.h"
+namespace Audio {
+class AudioStream;
+class Mixer;
+}
 
 namespace Scumm {
 
diff --git a/engines/scumm/imuse_digi/dimuse_sndmgr.cpp b/engines/scumm/imuse_digi/dimuse_sndmgr.cpp
index 78d05c2..b2ff3aa 100644
--- a/engines/scumm/imuse_digi/dimuse_sndmgr.cpp
+++ b/engines/scumm/imuse_digi/dimuse_sndmgr.cpp
@@ -22,8 +22,8 @@
 
 
 #include "common/scummsys.h"
-#include "common/util.h"
 
+#include "audio/audiostream.h"
 #include "audio/decoders/flac.h"
 #include "audio/decoders/voc.h"
 #include "audio/decoders/vorbis.h"
@@ -31,8 +31,6 @@
 
 #include "scumm/resource.h"
 #include "scumm/scumm.h"
-#include "scumm/util.h"
-#include "scumm/imuse_digi/dimuse.h"
 #include "scumm/imuse_digi/dimuse_bndmgr.h"
 #include "scumm/imuse_digi/dimuse_codecs.h"
 #include "scumm/imuse_digi/dimuse_sndmgr.h"
diff --git a/engines/scumm/imuse_digi/dimuse_sndmgr.h b/engines/scumm/imuse_digi/dimuse_sndmgr.h
index aebf4d7..2f91405 100644
--- a/engines/scumm/imuse_digi/dimuse_sndmgr.h
+++ b/engines/scumm/imuse_digi/dimuse_sndmgr.h
@@ -25,13 +25,20 @@
 
 
 #include "common/scummsys.h"
-#include "audio/audiostream.h"
-#include "scumm/imuse_digi/dimuse_bndmgr.h"
+
+namespace Audio {
+class SeekableAudioStream;
+}
+
+namespace Common {
+class SeekableReadStream;
+}
 
 namespace Scumm {
 
 class ScummEngine;
 class BundleMgr;
+class BundleDirCache;
 
 class ImuseDigiSndMgr {
 public:
diff --git a/engines/scumm/imuse_digi/dimuse_track.h b/engines/scumm/imuse_digi/dimuse_track.h
index 7e36026..a007903 100644
--- a/engines/scumm/imuse_digi/dimuse_track.h
+++ b/engines/scumm/imuse_digi/dimuse_track.h
@@ -24,6 +24,11 @@
 #define SCUMM_IMUSE_DIGI_TRACK_H
 
 #include "common/scummsys.h"
+#include "audio/mixer.h"
+
+namespace Audio {
+class QueuingAudioStream;
+}
 
 namespace Scumm {
 
diff --git a/engines/scumm/midiparser_ro.cpp b/engines/scumm/midiparser_ro.cpp
index 35eb9f7..5fc1ae4 100644
--- a/engines/scumm/midiparser_ro.cpp
+++ b/engines/scumm/midiparser_ro.cpp
@@ -22,9 +22,7 @@
 
 
 #include "audio/midiparser.h"
-#include "audio/mididrv.h"
 #include "common/textconsole.h"
-#include "common/util.h"
 
 namespace Scumm {
 
diff --git a/engines/scumm/players/player_ad.h b/engines/scumm/players/player_ad.h
index 9cd1a06..1e665e8 100644
--- a/engines/scumm/players/player_ad.h
+++ b/engines/scumm/players/player_ad.h
@@ -25,8 +25,6 @@
 
 #include "scumm/music.h"
 
-#include "audio/audiostream.h"
-
 #include "common/mutex.h"
 
 namespace OPL {
@@ -36,6 +34,7 @@ class OPL;
 namespace Scumm {
 
 class ScummEngine;
+class Serializer;
 
 /**
  * Sound output for v3/v4 AdLib data.
diff --git a/engines/scumm/players/player_apple2.h b/engines/scumm/players/player_apple2.h
index 8efb951..2e897d5 100644
--- a/engines/scumm/players/player_apple2.h
+++ b/engines/scumm/players/player_apple2.h
@@ -25,11 +25,9 @@
 
 #include "common/mutex.h"
 #include "common/scummsys.h"
-#include "common/memstream.h"
 #include "scumm/music.h"
 #include "audio/audiostream.h"
 #include "audio/mixer.h"
-#include "audio/softsynth/sid.h"
 
 namespace Scumm {
 
diff --git a/engines/scumm/players/player_v2cms.cpp b/engines/scumm/players/player_v2cms.cpp
index 0832193..1a1cd1e 100644
--- a/engines/scumm/players/player_v2cms.cpp
+++ b/engines/scumm/players/player_v2cms.cpp
@@ -22,7 +22,6 @@
 
 #include "scumm/players/player_v2cms.h"
 #include "scumm/scumm.h"
-#include "audio/mididrv.h"
 #include "audio/mixer.h"
 #include "audio/softsynth/cms.h"
 
diff --git a/engines/scumm/players/player_v3m.h b/engines/scumm/players/player_v3m.h
index 81dda80..645f1fb 100644
--- a/engines/scumm/players/player_v3m.h
+++ b/engines/scumm/players/player_v3m.h
@@ -28,10 +28,10 @@
 #include "common/mutex.h"
 #include "scumm/music.h"
 #include "scumm/players/player_mac.h"
-#include "audio/audiostream.h"
-#include "audio/mixer.h"
 
+namespace Audio {
 class Mixer;
+}
 
 namespace Scumm {
 
diff --git a/engines/scumm/players/player_v5m.h b/engines/scumm/players/player_v5m.h
index f60a3f9..152aa15 100644
--- a/engines/scumm/players/player_v5m.h
+++ b/engines/scumm/players/player_v5m.h
@@ -28,10 +28,10 @@
 #include "common/mutex.h"
 #include "scumm/music.h"
 #include "scumm/players/player_mac.h"
-#include "audio/audiostream.h"
-#include "audio/mixer.h"
 
+namespace Audio {
 class Mixer;
+}
 
 namespace Scumm {
 
diff --git a/engines/scumm/saveload.cpp b/engines/scumm/saveload.cpp
index f3df24f..40dc83c 100644
--- a/engines/scumm/saveload.cpp
+++ b/engines/scumm/saveload.cpp
@@ -41,8 +41,6 @@
 #include "scumm/he/sprite_he.h"
 #include "scumm/verbs.h"
 
-#include "audio/mixer.h"
-
 #include "backends/audiocd/audiocd.h"
 
 #include "graphics/thumbnail.h"
diff --git a/engines/scumm/smush/smush_mixer.cpp b/engines/scumm/smush/smush_mixer.cpp
index 42e8f64..445186d 100644
--- a/engines/scumm/smush/smush_mixer.cpp
+++ b/engines/scumm/smush/smush_mixer.cpp
@@ -21,14 +21,11 @@
  */
 
 
-#include "common/util.h"
-
 #include "scumm/smush/smush_mixer.h"
 #include "scumm/smush/channel.h"
 #include "scumm/scumm.h"
-#include "scumm/sound.h"
-#include "scumm/imuse/imuse.h"
 
+#include "audio/audiostream.h"
 #include "audio/mixer.h"
 #include "audio/decoders/raw.h"
 
diff --git a/engines/scumm/smush/smush_mixer.h b/engines/scumm/smush/smush_mixer.h
index 18ec7f9..1bd6ada 100644
--- a/engines/scumm/smush/smush_mixer.h
+++ b/engines/scumm/smush/smush_mixer.h
@@ -28,6 +28,10 @@
 #include "common/mutex.h"
 #include "scumm/sound.h"
 
+namespace Audio {
+class QueuingAudioStream;
+}
+
 namespace Scumm {
 
 class SmushChannel;
diff --git a/engines/scumm/smush/smush_player.cpp b/engines/scumm/smush/smush_player.cpp
index 05c7ff2..2ca2579 100644
--- a/engines/scumm/smush/smush_player.cpp
+++ b/engines/scumm/smush/smush_player.cpp
@@ -20,8 +20,6 @@
  *
  */
 
-#include "engines/engine.h"
-
 #include "common/config-manager.h"
 #include "common/file.h"
 #include "common/system.h"
@@ -30,14 +28,11 @@
 #include "graphics/cursorman.h"
 #include "graphics/palette.h"
 
-#include "scumm/bomp.h"
 #include "scumm/file.h"
 #include "scumm/imuse_digi/dimuse.h"
-#include "scumm/imuse/imuse.h"
 #include "scumm/scumm.h"
 #include "scumm/scumm_v7.h"
 #include "scumm/sound.h"
-#include "scumm/util.h"
 #include "scumm/smush/channel.h"
 #include "scumm/smush/codec37.h"
 #include "scumm/smush/codec47.h"
@@ -47,6 +42,7 @@
 
 #include "scumm/insane/insane.h"
 
+#include "audio/audiostream.h"
 #include "audio/mixer.h"
 #include "audio/decoders/mp3.h"
 #include "audio/decoders/raw.h"
diff --git a/engines/scumm/smush/smush_player.h b/engines/scumm/smush/smush_player.h
index 81c498a..b0d6e6a 100644
--- a/engines/scumm/smush/smush_player.h
+++ b/engines/scumm/smush/smush_player.h
@@ -26,6 +26,10 @@
 #include "common/util.h"
 #include "scumm/sound.h"
 
+namespace Audio {
+class QueuingAudioStream;
+}
+
 namespace Scumm {
 
 class ScummEngine_v7;
diff --git a/engines/scumm/sound.cpp b/engines/scumm/sound.cpp
index 404bdd0..f66452e 100644
--- a/engines/scumm/sound.cpp
+++ b/engines/scumm/sound.cpp
@@ -35,9 +35,9 @@
 #include "scumm/resource.h"
 #include "scumm/scumm.h"
 #include "scumm/sound.h"
-#include "scumm/util.h"
 
-#include "audio/decoders/adpcm.h"
+#include "audio/audiostream.h"
+#include "audio/timestamp.h"
 #include "audio/decoders/flac.h"
 #include "audio/mididrv.h"
 #include "audio/mixer.h"
@@ -45,7 +45,6 @@
 #include "audio/decoders/raw.h"
 #include "audio/decoders/voc.h"
 #include "audio/decoders/vorbis.h"
-#include "audio/decoders/wave.h"
 
 namespace Scumm {
 
diff --git a/engines/scumm/sound.h b/engines/scumm/sound.h
index a479ad5..8c11c7b 100644
--- a/engines/scumm/sound.h
+++ b/engines/scumm/sound.h
@@ -24,23 +24,17 @@
 #define SCUMM_SOUND_H
 
 #include "common/scummsys.h"
-#include "audio/audiostream.h"
+#include "common/str.h"
 #include "audio/mididrv.h"
 #include "audio/mixer.h"
 #include "backends/audiocd/audiocd.h"
 #include "scumm/saveload.h"
 
-namespace Audio {
-class Mixer;
-}
-
 namespace Scumm {
 
 class ScummEngine;
-class BaseScummFile;
 
 struct MP3OffsetTable;
-struct SaveLoadEntry;
 
 enum {
 	kTalkSoundID = 10000
diff --git a/engines/sherlock/debugger.cpp b/engines/sherlock/debugger.cpp
index 39f8da3..55243c4 100644
--- a/engines/sherlock/debugger.cpp
+++ b/engines/sherlock/debugger.cpp
@@ -26,9 +26,6 @@
 #include "sherlock/scalpel/scalpel.h"
 #include "sherlock/scalpel/scalpel_debugger.h"
 #include "sherlock/tattoo/tattoo_debugger.h"
-#include "audio/mixer.h"
-#include "audio/decoders/aiff.h"
-#include "audio/decoders/wave.h"
 #include "common/str-array.h"
 
 namespace Sherlock {
diff --git a/engines/sherlock/music.cpp b/engines/sherlock/music.cpp
index 5ea3318..c52c301 100644
--- a/engines/sherlock/music.cpp
+++ b/engines/sherlock/music.cpp
@@ -26,6 +26,7 @@
 #include "sherlock/sherlock.h"
 #include "sherlock/music.h"
 #include "sherlock/scalpel/drivers/mididriver.h"
+#include "audio/audiostream.h"
 // for Miles Audio (Sherlock Holmes 2)
 #include "audio/miles.h"
 // for 3DO digital music
diff --git a/engines/sherlock/music.h b/engines/sherlock/music.h
index 186e2aa..b1eba1d 100644
--- a/engines/sherlock/music.h
+++ b/engines/sherlock/music.h
@@ -23,12 +23,9 @@
 #ifndef SHERLOCK_MUSIC_H
 #define SHERLOCK_MUSIC_H
 
-#include "audio/midiplayer.h"
 #include "audio/midiparser.h"
-//#include "audio/mididrv.h"
-#include "sherlock/scalpel/drivers/mididriver.h"
+#include "audio/mididrv.h"
 // for 3DO digital music
-#include "audio/audiostream.h"
 #include "audio/mixer.h"
 #include "common/mutex.h"
 #include "common/str-array.h"
diff --git a/engines/sherlock/scalpel/3do/movie_decoder.cpp b/engines/sherlock/scalpel/3do/movie_decoder.cpp
index da4d08c..da0d16c 100644
--- a/engines/sherlock/scalpel/3do/movie_decoder.cpp
+++ b/engines/sherlock/scalpel/3do/movie_decoder.cpp
@@ -25,7 +25,6 @@
 #include "common/textconsole.h"
 
 #include "audio/audiostream.h"
-#include "audio/decoders/raw.h"
 #include "audio/decoders/3do.h"
 
 #include "sherlock/scalpel/3do/movie_decoder.h"
diff --git a/engines/sherlock/scalpel/drivers/adlib.cpp b/engines/sherlock/scalpel/drivers/adlib.cpp
index 29a39f0..3d29d0c 100644
--- a/engines/sherlock/scalpel/drivers/adlib.cpp
+++ b/engines/sherlock/scalpel/drivers/adlib.cpp
@@ -21,14 +21,12 @@
  */
 
 #include "sherlock/sherlock.h"
-#include "sherlock/scalpel/drivers/mididriver.h"
 
-#include "common/file.h"
 #include "common/system.h"
 #include "common/textconsole.h"
 
 #include "audio/fmopl.h"
-#include "audio/softsynth/emumidi.h"
+#include "audio/mididrv.h"
 
 namespace Sherlock {
 
diff --git a/engines/sherlock/scalpel/scalpel_debugger.cpp b/engines/sherlock/scalpel/scalpel_debugger.cpp
index 1495c76..02b39ad 100644
--- a/engines/sherlock/scalpel/scalpel_debugger.cpp
+++ b/engines/sherlock/scalpel/scalpel_debugger.cpp
@@ -22,10 +22,9 @@
 
 #include "sherlock/scalpel/scalpel_debugger.h"
 #include "sherlock/sherlock.h"
+#include "audio/audiostream.h"
 #include "audio/mixer.h"
-#include "audio/decoders/3do.h"
 #include "audio/decoders/aiff.h"
-#include "audio/decoders/wave.h"
 
 namespace Sherlock {
 
diff --git a/engines/sherlock/sound.h b/engines/sherlock/sound.h
index 0a0ff83..a82aaf6 100644
--- a/engines/sherlock/sound.h
+++ b/engines/sherlock/sound.h
@@ -25,11 +25,8 @@
 
 #include "common/scummsys.h"
 #include "common/str.h"
-#include "audio/audiostream.h"
 #include "audio/mixer.h"
 #include "access/files.h"
-#include "audio/midiplayer.h"
-#include "audio/midiparser.h"
 
 namespace Sherlock {
 
diff --git a/engines/sky/music/adlibchannel.cpp b/engines/sky/music/adlibchannel.cpp
index c7acb9b..2f44add 100644
--- a/engines/sky/music/adlibchannel.cpp
+++ b/engines/sky/music/adlibchannel.cpp
@@ -23,7 +23,7 @@
 
 #include "common/endian.h"
 #include "common/textconsole.h"
-#include "common/util.h"
+#include "audio/fmopl.h"
 #include "sky/music/adlibchannel.h"
 #include "sky/sky.h"
 
diff --git a/engines/sky/music/adlibchannel.h b/engines/sky/music/adlibchannel.h
index 4504e3b..b190ba2 100644
--- a/engines/sky/music/adlibchannel.h
+++ b/engines/sky/music/adlibchannel.h
@@ -24,7 +24,10 @@
 #define SKY_MUSIC_ADLIBCHANNEL_H
 
 #include "sky/music/musicbase.h"
-#include "audio/fmopl.h"
+
+namespace OPL {
+class OPL;
+}
 
 namespace Sky {
 
diff --git a/engines/sky/music/adlibmusic.cpp b/engines/sky/music/adlibmusic.cpp
index be5e7b2..1a2a91c 100644
--- a/engines/sky/music/adlibmusic.cpp
+++ b/engines/sky/music/adlibmusic.cpp
@@ -26,9 +26,13 @@
 
 #include "sky/music/adlibmusic.h"
 #include "sky/music/adlibchannel.h"
-#include "audio/mixer.h"
+#include "audio/fmopl.h"
 #include "sky/sky.h"
 
+namespace Audio {
+class Mixer;
+}
+
 namespace Sky {
 
 AdLibMusic::AdLibMusic(Audio::Mixer *pMixer, Disk *pDisk) : MusicBase(pMixer, pDisk) {
diff --git a/engines/sky/music/adlibmusic.h b/engines/sky/music/adlibmusic.h
index 7b51f2d..ebfa038 100644
--- a/engines/sky/music/adlibmusic.h
+++ b/engines/sky/music/adlibmusic.h
@@ -24,7 +24,10 @@
 #define SKY_MUSIC_ADLIBMUSIC_H
 
 #include "sky/music/musicbase.h"
-#include "audio/audiostream.h"
+
+namespace Audio {
+class Mixer;
+}
 
 namespace OPL {
 class OPL;
diff --git a/engines/sword1/logic.h b/engines/sword1/logic.h
index 94da2b3..005846d 100644
--- a/engines/sword1/logic.h
+++ b/engines/sword1/logic.h
@@ -28,10 +28,13 @@
 #include "sword1/objectman.h"
 #include "common/util.h"
 #include "common/random.h"
-#include "audio/mixer.h"
 
 class OSystem;
 
+namespace Audio {
+class Mixer;
+}
+
 namespace Sword1 {
 
 #define NON_ZERO_SCRIPT_VARS 95
diff --git a/engines/sword1/sound.cpp b/engines/sword1/sound.cpp
index 4deaf06..a37f7d2 100644
--- a/engines/sword1/sound.cpp
+++ b/engines/sword1/sound.cpp
@@ -37,7 +37,6 @@
 #include "audio/decoders/mp3.h"
 #include "audio/decoders/raw.h"
 #include "audio/decoders/vorbis.h"
-#include "audio/decoders/wave.h"
 #include "audio/decoders/xa.h"
 
 namespace Sword1 {
diff --git a/engines/sword2/music.cpp b/engines/sword2/music.cpp
index 62fb3d2..462a490 100644
--- a/engines/sword2/music.cpp
+++ b/engines/sword2/music.cpp
@@ -35,10 +35,11 @@
 #include "common/system.h"
 #include "common/textconsole.h"
 
+#include "audio/audiostream.h"
+#include "audio/mixer.h"
 #include "audio/decoders/mp3.h"
 #include "audio/decoders/vorbis.h"
 #include "audio/decoders/flac.h"
-#include "audio/decoders/wave.h"
 #include "audio/decoders/xa.h"
 #include "audio/rate.h"
 
diff --git a/engines/sword25/sfx/soundengine.cpp b/engines/sword25/sfx/soundengine.cpp
index dcb29cb..46f27b0 100644
--- a/engines/sword25/sfx/soundengine.cpp
+++ b/engines/sword25/sfx/soundengine.cpp
@@ -36,6 +36,7 @@
 #include "sword25/kernel/inputpersistenceblock.h"
 #include "sword25/kernel/outputpersistenceblock.h"
 
+#include "audio/audiostream.h"
 #include "audio/decoders/vorbis.h"
 
 #include "common/system.h"
diff --git a/engines/sword25/sfx/soundengine.h b/engines/sword25/sfx/soundengine.h
index 1dd7ba0..9bf251b 100644
--- a/engines/sword25/sfx/soundengine.h
+++ b/engines/sword25/sfx/soundengine.h
@@ -49,7 +49,6 @@
 #include "sword25/kernel/resservice.h"
 #include "sword25/kernel/persistable.h"
 
-#include "audio/audiostream.h"
 #include "audio/mixer.h"
 
 namespace Sword25 {
diff --git a/engines/teenagent/font.cpp b/engines/teenagent/font.cpp
index ab75a45..f691ace 100644
--- a/engines/teenagent/font.cpp
+++ b/engines/teenagent/font.cpp
@@ -25,6 +25,7 @@
 #include "teenagent/pack.h"
 #include "teenagent/teenagent.h"
 
+#include "common/debug.h"
 #include "common/endian.h"
 #include "common/stream.h"
 #include "common/textconsole.h"
diff --git a/engines/teenagent/resources.cpp b/engines/teenagent/resources.cpp
index 8d8f705..3cf566a 100644
--- a/engines/teenagent/resources.cpp
+++ b/engines/teenagent/resources.cpp
@@ -22,6 +22,7 @@
 
 #include "teenagent/resources.h"
 #include "teenagent/teenagent.h"
+#include "common/debug.h"
 #include "common/textconsole.h"
 #include "common/translation.h"
 #include "common/zlib.h"
diff --git a/engines/teenagent/teenagent.h b/engines/teenagent/teenagent.h
index a06f8db..234bfb1 100644
--- a/engines/teenagent/teenagent.h
+++ b/engines/teenagent/teenagent.h
@@ -25,11 +25,9 @@
 
 #include "engines/engine.h"
 
-#include "audio/audiostream.h"
 #include "audio/mixer.h"
 
 #include "common/random.h"
-#include "common/rect.h"
 #include "common/array.h"
 
 #include "gui/debugger.h"
@@ -39,6 +37,14 @@
 
 struct ADGameDescription;
 
+namespace Audio {
+class AudioStream;
+}
+
+namespace Common {
+struct Point;
+}
+
 /**
  * This is the namespace of the TeenAgent engine.
  *
@@ -53,7 +59,6 @@ struct Object;
 struct UseHotspot;
 class Scene;
 class MusicPlayer;
-class Dialog;
 class Resources;
 class Inventory;
 
diff --git a/engines/testbed/midi.cpp b/engines/testbed/midi.cpp
index daa5f1c..5ede21f 100644
--- a/engines/testbed/midi.cpp
+++ b/engines/testbed/midi.cpp
@@ -27,6 +27,7 @@
 #include "graphics/cursorman.h"
 
 #include "audio/mididrv.h"
+#include "audio/midiparser.h"
 
 #include "testbed/midi.h"
 #include "testbed/testbed.h"
diff --git a/engines/testbed/midi.h b/engines/testbed/midi.h
index b9f3e82..5ed0a73 100644
--- a/engines/testbed/midi.h
+++ b/engines/testbed/midi.h
@@ -23,12 +23,16 @@
 #ifndef TESTBED_MIDI_H
 #define TESTBED_MIDI_H
 
-#include "common/stream.h"
-#include "audio/midiparser.h"
 #include "testbed/testsuite.h"
 
 // This file can be used as template for header files of other newer testsuites.
 
+class MidiParser;
+
+namespace Common {
+class WriteStream;
+}
+
 namespace Testbed {
 
 namespace MidiTests {
diff --git a/engines/tinsel/bmv.cpp b/engines/tinsel/bmv.cpp
index f28cd68..22c3798 100644
--- a/engines/tinsel/bmv.cpp
+++ b/engines/tinsel/bmv.cpp
@@ -39,6 +39,7 @@
 #include "tinsel/tinlib.h"
 #include "tinsel/tinsel.h"
 
+#include "audio/audiostream.h"
 #include "audio/decoders/raw.h"
 
 #include "common/textconsole.h"
diff --git a/engines/tinsel/bmv.h b/engines/tinsel/bmv.h
index e52297f..888f910 100644
--- a/engines/tinsel/bmv.h
+++ b/engines/tinsel/bmv.h
@@ -27,12 +27,15 @@
 #include "common/coroutines.h"
 #include "common/file.h"
 
-#include "audio/audiostream.h"
 #include "audio/mixer.h"
 
 #include "tinsel/object.h"
 #include "tinsel/palette.h"
 
+namespace Audio {
+class QueuingAudioStream;
+}
+
 namespace Tinsel {
 
 
diff --git a/engines/tinsel/music.cpp b/engines/tinsel/music.cpp
index e0c1f8d..32d5abb 100644
--- a/engines/tinsel/music.cpp
+++ b/engines/tinsel/music.cpp
@@ -29,7 +29,6 @@
 #include "audio/midiparser.h"
 // Miles Audio for Discworld 1
 #include "audio/miles.h"
-#include "audio/decoders/adpcm.h"
 
 #include "backends/audiocd/audiocd.h"
 
diff --git a/engines/tinsel/sound.cpp b/engines/tinsel/sound.cpp
index 3d87a17..a13e91f 100644
--- a/engines/tinsel/sound.cpp
+++ b/engines/tinsel/sound.cpp
@@ -27,7 +27,6 @@
 #include "tinsel/dw.h"
 #include "tinsel/config.h"
 #include "tinsel/music.h"
-#include "tinsel/strres.h"
 #include "tinsel/tinsel.h"
 #include "tinsel/sysvar.h"
 #include "tinsel/background.h"
@@ -37,7 +36,6 @@
 #include "common/system.h"
 
 #include "audio/mixer.h"
-#include "audio/decoders/adpcm.h"
 #include "audio/decoders/flac.h"
 #include "audio/decoders/mp3.h"
 #include "audio/decoders/raw.h"
diff --git a/engines/toltecs/movie.cpp b/engines/toltecs/movie.cpp
index 0aa0a99..b64903e 100644
--- a/engines/toltecs/movie.cpp
+++ b/engines/toltecs/movie.cpp
@@ -20,6 +20,7 @@
  *
  */
 
+#include "audio/audiostream.h"
 #include "audio/mixer.h"
 #include "audio/decoders/raw.h"
 
diff --git a/engines/toltecs/movie.h b/engines/toltecs/movie.h
index 9404e5f..8c6348d 100644
--- a/engines/toltecs/movie.h
+++ b/engines/toltecs/movie.h
@@ -23,9 +23,12 @@
 #ifndef TOLTECS_MOVIE_H
 #define TOLTECS_MOVIE_H
 
-#include "audio/audiostream.h"
 #include "audio/mixer.h"	// for Audio::SoundHandle
 
+namespace Audio {
+class QueuingAudioStream;
+}
+
 namespace Toltecs {
 
 class MoviePlayer {
diff --git a/engines/touche/touche.cpp b/engines/touche/touche.cpp
index ff4f41f..bb21f39 100644
--- a/engines/touche/touche.cpp
+++ b/engines/touche/touche.cpp
@@ -32,6 +32,7 @@
 #include "common/keyboard.h"
 #include "common/textconsole.h"
 
+#include "audio/audiostream.h"
 #include "audio/mixer.h"
 
 #include "engines/util.h"
diff --git a/engines/touche/touche.h b/engines/touche/touche.h
index 3de5b8c..33c415d 100644
--- a/engines/touche/touche.h
+++ b/engines/touche/touche.h
@@ -31,7 +31,6 @@
 #include "common/util.h"
 
 #include "audio/mixer.h"
-#include "audio/audiostream.h"
 
 #include "engines/engine.h"
 
diff --git a/engines/tsage/sound.h b/engines/tsage/sound.h
index 68755a4..da56c8b 100644
--- a/engines/tsage/sound.h
+++ b/engines/tsage/sound.h
@@ -26,12 +26,15 @@
 #include "common/scummsys.h"
 #include "common/mutex.h"
 #include "common/queue.h"
-#include "audio/audiostream.h"
 #include "audio/mixer.h"
 #include "common/list.h"
 #include "tsage/saveload.h"
 #include "tsage/core.h"
 
+namespace Audio {
+class QueuingAudioStream;
+}
+
 namespace OPL {
 class OPL;
 }
diff --git a/engines/tsage/tsage.h b/engines/tsage/tsage.h
index 1a29700..dd077e5 100644
--- a/engines/tsage/tsage.h
+++ b/engines/tsage/tsage.h
@@ -24,9 +24,6 @@
 #define TSAGE_H
 
 #include "engines/engine.h"
-#include "common/rect.h"
-#include "audio/mixer.h"
-#include "common/file.h"
 #include "gui/debugger.h"
 
 #include "tsage/core.h"
diff --git a/engines/voyeur/animation.h b/engines/voyeur/animation.h
index bc6d8a3..c20ccf7 100644
--- a/engines/voyeur/animation.h
+++ b/engines/voyeur/animation.h
@@ -26,13 +26,16 @@
 #include "video/video_decoder.h"
 #include "audio/audiostream.h"
 #include "audio/mixer.h"
-#include "audio/timestamp.h"
 #include "common/array.h"
 #include "common/list.h"
 #include "common/rect.h"
 #include "common/stream.h"
 #include "voyeur/files.h"
 
+namespace Audio {
+class Timestamp;
+}
+
 namespace Voyeur {
 
 class VoyeurEngine;
diff --git a/engines/voyeur/sound.cpp b/engines/voyeur/sound.cpp
index f47fdde..483dfc7 100644
--- a/engines/voyeur/sound.cpp
+++ b/engines/voyeur/sound.cpp
@@ -22,6 +22,8 @@
 
 #include "audio/audiostream.h"
 #include "audio/decoders/raw.h"
+#include "audio/decoders/voc.h"
+#include "common/file.h"
 #include "common/memstream.h"
 #include "voyeur/sound.h"
 #include "voyeur/staticres.h"
diff --git a/engines/voyeur/sound.h b/engines/voyeur/sound.h
index af1d0b1..fd1d126 100644
--- a/engines/voyeur/sound.h
+++ b/engines/voyeur/sound.h
@@ -26,8 +26,6 @@
 #include "common/scummsys.h"
 #include "common/str.h"
 #include "audio/mixer.h"
-#include "audio/decoders/voc.h"
-#include "voyeur/files.h"
 
 namespace Voyeur {
 
diff --git a/engines/zvision/core/events.cpp b/engines/zvision/core/events.cpp
index cc1c00b..767101b 100644
--- a/engines/zvision/core/events.cpp
+++ b/engines/zvision/core/events.cpp
@@ -35,6 +35,7 @@
 #include "common/events.h"
 #include "common/system.h"
 #include "common/rational.h"
+#include "audio/mixer.h"
 
 #include "engines/util.h"
 
diff --git a/engines/zvision/scripting/actions.h b/engines/zvision/scripting/actions.h
index bde1baa..98d216a 100644
--- a/engines/zvision/scripting/actions.h
+++ b/engines/zvision/scripting/actions.h
@@ -26,8 +26,6 @@
 #include "common/str.h"
 #include "common/rect.h"
 
-#include "audio/mixer.h"
-
 namespace ZVision {
 
 // Forward declaration of ZVision. This file is included before ZVision is declared
diff --git a/engines/zvision/sound/midi.cpp b/engines/zvision/sound/midi.cpp
index 3dd66ff..9366f9e 100644
--- a/engines/zvision/sound/midi.cpp
+++ b/engines/zvision/sound/midi.cpp
@@ -22,6 +22,7 @@
 
 #include "common/scummsys.h"
 #include "common/textconsole.h"
+#include "audio/mididrv.h"
 
 #include "zvision/sound/midi.h"
 
diff --git a/engines/zvision/sound/midi.h b/engines/zvision/sound/midi.h
index a3bac19..020c65c 100644
--- a/engines/zvision/sound/midi.h
+++ b/engines/zvision/sound/midi.h
@@ -23,7 +23,7 @@
 #ifndef ZVISION_MIDI_H
 #define ZVISION_MIDI_H
 
-#include "audio/mididrv.h"
+class MidiDriver;
 
 namespace ZVision {
 
diff --git a/engines/zvision/zvision.cpp b/engines/zvision/zvision.cpp
index b0d69c5..05db284 100644
--- a/engines/zvision/zvision.cpp
+++ b/engines/zvision/zvision.cpp
@@ -34,13 +34,13 @@
 #include "zvision/text/text.h"
 #include "zvision/text/truetype_font.h"
 #include "zvision/sound/midi.h"
-#include "zvision/file/zfs_archive.h"
 
 #include "common/config-manager.h"
 #include "common/str.h"
 #include "common/debug.h"
 #include "common/debug-channels.h"
 #include "common/textconsole.h"
+#include "common/timer.h"
 #include "common/error.h"
 #include "common/system.h"
 #include "common/file.h"
diff --git a/video/mpegps_decoder.cpp b/video/mpegps_decoder.cpp
index 6942efb..d2e9554 100644
--- a/video/mpegps_decoder.cpp
+++ b/video/mpegps_decoder.cpp
@@ -21,7 +21,6 @@
  */
 
 #include "audio/audiostream.h"
-#include "audio/decoders/raw.h"
 #include "audio/decoders/mp3.h"
 #include "common/debug.h"
 #include "common/endian.h"
diff --git a/video/psx_decoder.cpp b/video/psx_decoder.cpp
index 91f8e1d..4f14e2e 100644
--- a/video/psx_decoder.cpp
+++ b/video/psx_decoder.cpp
@@ -24,7 +24,6 @@
 // MDEC video emulation based on http://kenai.com/downloads/jpsxdec/Old/PlayStation1_STR_format1-00.txt
 
 #include "audio/audiostream.h"
-#include "audio/mixer.h"
 #include "audio/decoders/raw.h"
 #include "common/bitstream.h"
 #include "common/huffman.h"

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