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/*
$Id: static_provider_wave.cpp,v 1.3 2001/12/11 20:44:24 mbn Exp $
------------------------------------------------------------------------
ClanLib, the platform independent game SDK.
This library is distributed under the GNU LIBRARY GENERAL PUBLIC LICENSE
version 2. See COPYING for details.
For a total list of contributers see CREDITS.
------------------------------------------------------------------------
File purpose:
Simple sample support.
*/
#ifdef WIN32
#pragma warning (disable:4786)
#endif
#include "API/Core/IOData/inputsource_provider.h"
#include "API/Core/IOData/inputsource.h"
#include "API/Core/System/cl_assert.h"
#include "API/Core/System/error.h"
#include "API/Sound/SoundProviders/static_provider_raw.h"
#include "API/Sound/SoundProviders/static_provider_wave.h"
CL_SoundBuffer *CL_Sample::create(const std::string &sample_id, CL_InputSourceProvider *provider)
{
return CL_SoundBuffer::create(new CL_Sample(sample_id, provider), true);
}
CL_Sample::CL_Sample(const std::string &s_id, CL_InputSourceProvider *_provider) : sample_id(s_id)
{
if (_provider == NULL)
{
provider = CL_InputSourceProvider::create_file_provider(".");
}
else
{
provider = _provider->clone();
}
sample_data = NULL;
}
CL_Sample::~CL_Sample()
{
delete[] sample_data;
delete provider;
}
void CL_Sample::load_data()
{
CL_InputSource *source = provider->open_source(sample_id.c_str());
cl_assert(source != NULL);
// Check to see if this is really a .wav-file
char temp[12];
source->read(temp, 4);
source->seek(4, CL_InputSource::seek_cur);
source->read(&temp[4], 8);
source->seek(4, CL_InputSource::seek_cur);
if (memcmp(temp, "RIFFWAVEfmt ", 12) != 0)
{
throw CL_Error("Invalid RIFF WAVE header!");
}
// cl_assert(!(memcmp(temp, "RIFFWAVEfmt ", 12)));
WAVE_FORMAT format;
source->read(&format, sizeof(WAVE_FORMAT));
// Another sanity check
source->read(temp, 4);
temp[4] = 0;
if (memcmp(temp, "data", 4) != 0)
{
throw CL_Error("Invalid RIFF data chunk!");
}
// cl_assert(!(memcmp(temp, "data", 4)));
sample_size = source->read_int32();
sample_freq = format.nSamplesPerSec;
int bytes_per_sample = format.nAvgBytesPerSec / format.nSamplesPerSec;
if (format.nChannels == 2 && bytes_per_sample == 4) sample_format = sf_16bit_signed_stereo;
else if (format.nChannels == 2 && bytes_per_sample == 2) sample_format = sf_8bit_signed_stereo;
else if (format.nChannels == 1 && bytes_per_sample == 2) sample_format = sf_16bit_signed;
else if (format.nChannels == 1 && bytes_per_sample == 1) sample_format = sf_8bit_signed;
else
{
std::cout <<" Invalid wave file format " <<std::endl;
std::cout <<"---------------------------------" <<std::endl;
std::cout <<"Sample size: " << sample_size <<std::endl;
std::cout <<"Sample frequency: " << sample_freq <<std::endl;
std::cout <<"Number of channels: " << format.nChannels <<std::endl;
std::cout <<"Number of bytes pr. sample: " << bytes_per_sample <<std::endl;
std::cout <<"---------------------------------" <<std::endl;
throw CL_Error("Invalid wave file format");
}
sample_data = new char[sample_size];
if (sample_format == sf_8bit_signed || sample_format == sf_8bit_signed_stereo)
{
unsigned char *temp = new unsigned char[sample_size];
source->read(temp, sample_size);
for (int i=0;i<sample_size;i++) sample_data[i] = char(short(temp[i])-128);
delete[] temp;
}
else
{
source->read(sample_data, sample_size);
}
delete source;
}
void CL_Sample::lock()
{
if (sample_data != NULL) return;
load_data();
}
void CL_Sample::unlock()
{
delete[] sample_data;
sample_data = NULL;
}
SoundFormat CL_Sample::get_format() const
{
return sample_format;
}
int CL_Sample::data_size() const
{
return sample_size;
}
void *CL_Sample::get_data() const
{
return sample_data;
}
int CL_Sample::get_frequency() const
{
return sample_freq;
}
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