musicplayer.cpp

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/***************************************************************************

    file                 : musicplayer.cpp
    created              : Fri Dec 23 17:35:18 CET 2011
    copyright            : (C) 2011 Bernhard Wymann
    email                : berniw@bluewin.ch
    version              : $Id$

 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#include "musicplayer.h"

#include <GL/glut.h>
#include <string.h>
#include <tgf.h>
#include <portability.h>

#include "OggSoundStream.h"
#include "OpenALMusicPlayer.h"


static bool isEnabled()
{
    const int BUFSIZE = 1024;
    char buf[BUFSIZE];
    snprintf(buf, BUFSIZE, "%s%s", GetLocalDir(), MM_SOUND_PARM_CFG);
    bool enabled = false;
    
    void *handle = GfParmReadFile(buf, GFPARM_RMODE_STD | GFPARM_RMODE_CREAT);
    const char* s = GfParmGetStr(handle, MM_SCT_SOUND, MM_ATT_SOUND_ENABLE, MM_VAL_SOUND_DISABLED);
    
    if (strcmp(s, MM_VAL_SOUND_ENABLED) == 0) {
        enabled = true;
    }
    
    GfParmReleaseHandle(handle);
    return enabled;
}


// Path relative to CWD, e.g "data/music/torcs1.ogg"
static SoundStream* getMenuSoundStream(char* oggFilePath)
{
    static OggSoundStream stream(oggFilePath);
    return &stream;
}


static OpenALMusicPlayer* getMusicPlayer()
{
    const int BUFSIZE = 1024;
    char oggFilePath[BUFSIZE];
    strncpy(oggFilePath, "data/music/torcs1.ogg", BUFSIZE);

    static OpenALMusicPlayer player(getMenuSoundStream(oggFilePath));
    return &player;
}


static void playMenuMusic(int /* value */)
{
    const int nextcallinms = 100;
    
    OpenALMusicPlayer* player = getMusicPlayer();
    if (player->playAndManageBuffer()) {
        glutTimerFunc(nextcallinms, playMenuMusic, 0);
    }
}


void startMenuMusic()
{
    if (isEnabled()) {
        OpenALMusicPlayer* player = getMusicPlayer();
        player->start();
        playMenuMusic(0);
    }
}


void stopMenuMusic()
{
    OpenALMusicPlayer* player = getMusicPlayer();
    player->stop();
    player->rewind();
}