Implemented a simple non-blocking fadeOutAndPlay system.

It's currently used when changing maps.

Resolves: TMW-Mantis: #750.

Reviewed-by: Thorbjorn.

Conflicts:

	src/game.cpp
	src/sound.cpp
	src/sound.h

1 files changed, 25 insertions, 3 deletions

diff --git a/src/sound.h b/src/sound.h
index 0de9f0636..6a509a574 100644
--- a/src/sound.h
+++ b/src/sound.h
@@ -73,16 +73,25 @@ class Sound : public ConfigListener
          * @param path The full path to the music file.
          * @param ms   Duration of fade-in effect (ms)
          */
-        void fadeInMusic(const std::string &path, int ms = 2000);
+        void fadeInMusic(const std::string &path, int ms = 1000);
 
         /**
          * Fades out currently running background music track.
          *
          * @param ms   Duration of fade-out effect (ms)
          */
-        void fadeOutMusic(int ms);
+        void fadeOutMusic(int ms = 1000);
 
-        int getMaxVolume() const;
+        /**
+         * Fades out a background music and play a new one.
+         *
+         * @param path The full path to the fade in music file.
+         * @param ms   Duration of fade-out effect (ms)
+         */
+        void fadeOutAndPlayMusic(const std::string &path, int ms = 1000);
+
+        int getMaxVolume() const
+        { return MIX_MAX_VOLUME; }
 
         void setMusicVolume(int volume);
         void setSfxVolume(int volume);
@@ -110,6 +119,13 @@ class Sound : public ConfigListener
         std::string getCurrentMusicFile()
         { return mCurrentMusicFile; }
 
+        /**
+         * The sound logic.
+         * Currently used to check whether the music file can be freed after
+         * a fade out, and whether new music has to be played.
+         */
+        void logic();
+
     private:
         /** Logs various info about sound device. */
         void info();
@@ -117,6 +133,12 @@ class Sound : public ConfigListener
         /** Halts and frees currently playing music. */
         void haltMusic();
 
+        /**
+         * When calling fadeOutAndPlayMusic(),
+         * the music file below will then be played
+         */
+        std::string mNextMusicPath;
+
         bool mInstalled;
 
         int mSfxVolume;