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// ==============================================================
// This file is part of Glest Shared Library (www.glest.org)
//
// Copyright (C) 2001-2008 Martio Figueroa
//
// You can redistribute this code 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 "sound_file_loader.h"
#include <vorbis/codec.h>
#include <vorbis/vorbisfile.h>
#include "sound.h"
#include "leak_dumper.h"
using namespace Shared::Platform;
using namespace std;
namespace Shared{ namespace Sound{
// =====================================================
// class WavSoundFileLoader
// =====================================================
void WavSoundFileLoader::open(const string &path, SoundInfo *soundInfo){
char chunkId[]={'-', '-', '-', '-', '\0'};
uint32 size32= 0;
uint16 size16= 0;
int count;
f.open(path.c_str(), ios_base::in | ios_base::binary);
if(!f.is_open()){
throw runtime_error("Error opening wav file: "+ string(path));
}
//RIFF chunk - Id
f.read(chunkId, 4);
if(strcmp(chunkId, "RIFF")!=0){
throw runtime_error("Not a valid wav file (first four bytes are not RIFF):" + path);
}
//RIFF chunk - Size
f.read((char*) &size32, 4);
//RIFF chunk - Data (WAVE string)
f.read(chunkId, 4);
if(strcmp(chunkId, "WAVE")!=0){
throw runtime_error("Not a valid wav file (wave data don't start by WAVE): " + path);
}
// === HEADER ===
//first sub-chunk (header) - Id
f.read(chunkId, 4);
if(strcmp(chunkId, "fmt ")!=0){
throw runtime_error("Not a valid wav file (first sub-chunk Id is not fmt): "+ path);
}
//first sub-chunk (header) - Size
f.read((char*) &size32, 4);
//first sub-chunk (header) - Data (encoding type) - Ignore
f.read((char*) &size16, 2);
//first sub-chunk (header) - Data (nChannels)
f.read((char*) &size16, 2);
soundInfo->setChannels(size16);
//first sub-chunk (header) - Data (nsamplesPerSecond)
f.read((char*) &size32, 4);
soundInfo->setsamplesPerSecond(size32);
//first sub-chunk (header) - Data (nAvgBytesPerSec) - Ignore
f.read((char*) &size32, 4);
//first sub-chunk (header) - Data (blockAlign) - Ignore
f.read((char*) &size16, 2);
//first sub-chunk (header) - Data (nsamplesPerSecond)
f.read((char*) &size16, 2);
soundInfo->setBitsPerSample(size16);
if (soundInfo->getBitsPerSample() != 8 && soundInfo->getBitsPerSample()!=16){
throw runtime_error("Bits per sample must be 8 or 16: " + path);
}
bytesPerSecond= soundInfo->getBitsPerSample()*8*soundInfo->getSamplesPerSecond()*soundInfo->getChannels();
count=0;
do{
count++;
// === DATA ===
//second sub-chunk (samples) - Id
f.read(chunkId, 4);
if(strncmp(chunkId, "data", 4)!=0){
continue;
}
//second sub-chunk (samples) - Size
f.read((char*) &size32, 4);
dataSize= size32;
soundInfo->setSize(dataSize);
}
while(strncmp(chunkId, "data", 4)!=0 && count<maxDataRetryCount);
if(f.bad() || count==maxDataRetryCount){
throw runtime_error("Error reading samples: "+ path);
}
dataOffset= f.tellg();
}
uint32 WavSoundFileLoader::read(int8 *samples, uint32 size){
f.read(reinterpret_cast<char*> (samples), size);
return f.gcount();
}
void WavSoundFileLoader::close(){
f.close();
}
void WavSoundFileLoader::restart(){
f.seekg(dataOffset, ios_base::beg);
}
// =======================================
// Ogg Sound File Loader
// =======================================
void OggSoundFileLoader::open(const string &path, SoundInfo *soundInfo){
f= fopen(path.c_str(), "rb");
if(f==NULL){
throw runtime_error("Can't open ogg file: "+path);
}
vf= new OggVorbis_File();
ov_open(f, vf, NULL, 0);
vorbis_info *vi= ov_info(vf, -1);
soundInfo->setChannels(vi->channels);
soundInfo->setsamplesPerSecond(vi->rate);
soundInfo->setBitsPerSample(16);
soundInfo->setSize(static_cast<uint32>(ov_pcm_total(vf, -1))*2);
}
uint32 OggSoundFileLoader::read(int8 *samples, uint32 size){
int section;
int totalBytesRead= 0;
while(size>0){
int bytesRead= ov_read(vf, reinterpret_cast<char*> (samples), size,
0, 2, 1, §ion);
if(bytesRead==0){
break;
}
size-= bytesRead;
samples+= bytesRead;
totalBytesRead+= bytesRead;
}
return totalBytesRead;
}
void OggSoundFileLoader::close(){
if(vf!=NULL){
ov_clear(vf);
delete vf;
vf= 0;
}
}
void OggSoundFileLoader::restart(){
ov_raw_seek(vf, 0);
}
// =====================================================
// class SoundFileLoaderFactory
// =====================================================
SoundFileLoaderFactory::SoundFileLoaderFactory(){
registerClass<WavSoundFileLoader>("wav");
registerClass<OggSoundFileLoader>("ogg");
}
SoundFileLoaderFactory *SoundFileLoaderFactory::getInstance(){
static SoundFileLoaderFactory soundFileLoaderFactory;
return &soundFileLoaderFactory;
}
}}//end namespace
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