241 lines
7.3 KiB
C++
241 lines
7.3 KiB
C++
/***************************************************************************
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alienBlaster
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Copyright (C) 2004
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Paul Grathwohl, Arne Hormann, Daniel Kuehn, Soenke Schwardt
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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***************************************************************************/
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using namespace std;
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#include "mixer.h"
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#include "SDL_mixer.h"
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#include <string>
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#include <fstream>
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#include <iostream>
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#ifdef ANDROID
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#include <android/log.h>
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#endif
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Mixer * mixerInstance = NULL;
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Mixer & Mixer::mixer()
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{
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if( mixerInstance == NULL )
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mixerInstance = new Mixer();
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return *mixerInstance;
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}
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Mixer::Mixer() {
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__android_log_print(ANDROID_LOG_INFO, "Alien Blaster", "Initializing audio");
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if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0) {
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printf("Couldn't initialize SDL audio subsystem: %s\n", SDL_GetError());
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__android_log_print(ANDROID_LOG_ERROR, "Alien Blaster", "Couldn't initialize SDL audio subsystem: %s", SDL_GetError());
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exit(1);
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}
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__android_log_print(ANDROID_LOG_INFO, "Alien Blaster", "Initializing audio 2");
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mixChunks = MixChunks(0);
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musics = Musics(0);
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enabled = false;
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__android_log_print(ANDROID_LOG_INFO, "Alien Blaster", "Initializing audio 3");
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initMixer();
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lastUsedReservedChannel = 0;
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reservedChannels = 0;
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musicPlaying = MUSIC_NONE;
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__android_log_print(ANDROID_LOG_INFO, "Alien Blaster", "Initializing audio done");
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}
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Mixer::~Mixer() {
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if (enabled) {
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freeMixer();
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}
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}
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void Mixer::initMixer() {
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__android_log_print(ANDROID_LOG_INFO, "Alien Blaster", "Initializing audio 4");
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enabled = (Mix_OpenAudio(MIX_DEFAULT_FREQUENCY, MIX_DEFAULT_FORMAT, 1, 1024) >= 0);
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if (enabled) {
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Mix_AllocateChannels(MIXER_NUMBER_CHANNELS);
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reservedChannels = Mix_ReserveChannels( MIXER_RESERVED_CHANNELS );
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if ( MIXER_RESERVED_CHANNELS != reservedChannels )
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cout << "reserve channels not successfull: reserved: " << reservedChannels << endl;
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lastUsedReservedChannel = 0;
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fn2snd.clear();
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fn2mus.clear();
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playsOn.clear();
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}
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__android_log_print(ANDROID_LOG_INFO, "Alien Blaster", "Initializing audio 5");
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}
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void Mixer::freeMixer() {
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if (enabled) {
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Mix_ExpireChannel(-1, 0);
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for (unsigned int index = 0; index < mixChunks.size(); index++) {
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Mix_FreeChunk(mixChunks[index]);
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}
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for (unsigned int index = 0; index < musics.size(); index++) {
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Mix_FreeMusic(musics[index]);
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}
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}
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}
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int Mixer::loadSample(string fileName, int volume) {
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if (enabled) {
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if (fn2snd.find(fileName) == fn2snd.end()) {
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string fn = fileName;
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string fn1 = fn;
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__android_log_print(ANDROID_LOG_INFO, "Alien Blaster", (string( "Loading sound " ) + fn).c_str() );
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// Check if file exist
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FILE * inputFile = fopen( fn1.c_str(), "rb");
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if (!inputFile) {
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if( fn1.size() > 4 && fn1.find(".wav") != string::npos ) {
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fn1 = fn1.substr( 0, fn1.size() - 4 ) + ".ogg";
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inputFile = fopen( fn1.c_str(), "rb");
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}
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if (!inputFile) {
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cout << "ERROR: file " << fn1 << " does not exist!" << endl;
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#ifdef ANDROID
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__android_log_print(ANDROID_LOG_ERROR, "Alien Blaster", (string( "Cannot load sound " ) + fn1).c_str() );
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#endif
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exit(1);
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}
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}
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fclose(inputFile);
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// TODO: error-handling
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Mix_Chunk *newSound = Mix_LoadWAV(fn1.c_str());
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if( !newSound ) {
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cout << "ERROR: file " << fn1 << " cannot be loaded!" << endl;
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#ifdef ANDROID
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__android_log_print(ANDROID_LOG_ERROR, "Alien Blaster", (string( "Cannot load sound " ) + fn1).c_str() );
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#endif
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exit(1);
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}
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mixChunks.push_back(newSound);
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fn2snd[ fileName ] = mixChunks.size() - 1;
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if ( 0 <= volume && volume < 128 ) {
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Mix_VolumeChunk( mixChunks[ mixChunks.size() - 1 ], volume );
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}
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return mixChunks.size() - 1;
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}
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return fn2snd[ fileName ];
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}
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return 0;
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}
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bool Mixer::playSample( int sampleId, int loop, bool withPriority ) {
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int ret = -1;
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if (enabled) {
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if ( !withPriority || reservedChannels == 0 ) {
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ret = Mix_PlayChannel(-1, mixChunks[sampleId], loop);
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playsOn[ sampleId ] = ret;
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} else {
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lastUsedReservedChannel = (lastUsedReservedChannel+1) % reservedChannels;
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ret = Mix_PlayChannel( lastUsedReservedChannel, mixChunks[sampleId], loop );
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playsOn[ sampleId ] = ret;
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}
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//if ( ret == -1 ) cout << "playSample: error: " << Mix_GetError() << endl;
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return ret != -1;
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}
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return true;
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}
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bool Mixer::stopSample(int sampleId) {
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if (enabled) {
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return Mix_HaltChannel( playsOn[sampleId] ) != -1;
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}
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return true;
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}
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void Mixer::reset() {
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freeMixer();
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if (enabled) {
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initMixer();
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}
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}
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void Mixer::fadeOut(int mSecs) {
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if (enabled) {
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Mix_FadeOutChannel(-1, mSecs);
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}
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}
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int Mixer::loadMusic( string fn ) {
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if (enabled) {
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if (fn2mus.find(fn) == fn2mus.end()) {
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__android_log_print(ANDROID_LOG_INFO, "Alien Blaster", (string( "Loading sound " ) + fn).c_str() );
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string fn1 = fn;
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// Check if file exist
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FILE * inputFile = fopen( fn1.c_str(), "rb");
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if (!inputFile) {
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if( fn1.size() > 4 && fn1.find(".wav") != string::npos ) {
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fn1 = fn1.substr( 0, fn1.size() - 4 ) + ".ogg";
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inputFile = fopen( fn1.c_str(), "rb");
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}
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if (!inputFile) {
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cout << "ERROR: file " << fn1 << " does not exist!" << endl;
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#ifdef ANDROID
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__android_log_print(ANDROID_LOG_ERROR, "Alien Blaster", (string( "Cannot load sound " ) + fn1).c_str() );
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#endif
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exit(1);
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}
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}
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fclose(inputFile);
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// TODO: error-handling
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Mix_Music *newSound = Mix_LoadMUS(fn1.c_str());
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if( !newSound ) {
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cout << "ERROR: file " << fn1 << " cannot be loaded!" << endl;
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#ifdef ANDROID
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__android_log_print(ANDROID_LOG_ERROR, "Alien Blaster", (string( "Cannot load sound " ) + fn1).c_str() );
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#endif
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exit(1);
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}
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musics.push_back(newSound);
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fn2mus[ fn ] = musics.size() - 1;
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return musics.size() - 1;
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}
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return fn2mus[ fn ];
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}
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return 0;
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}
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void Mixer::playMusic( MusicTracks musNum, int loop, int fadeInTime ) {
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if (enabled) {
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if ( musNum < NR_MUSIC_TRACKS ) {
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Mix_FadeInMusic( musics[ loadMusic( FN_MUSIC[ (int)musNum ] ) ], loop, fadeInTime );
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musicPlaying = musNum;
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}
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}
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}
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void Mixer::stopMusic( int fadeOutTime ) {
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if (enabled) {
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Mix_FadeOutMusic( fadeOutTime );
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}
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}
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MusicTracks Mixer::whichMusicPlaying() {
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return musicPlaying;
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}
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