zmusic/source/streamsources/music_opl.cpp

152 lines
4.5 KiB
C++

/*
** music_opl.cpp
** Plays raw OPL formats
**
**---------------------------------------------------------------------------
** Copyright 1998-2008 Randy Heit
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
*/
#include "streamsource.h"
#include "oplsynth/opl.h"
#include "oplsynth/opl_mus_player.h"
#include "fileio.h"
#include "zmusic/midiconfig.h"
#ifdef HAVE_OPL
//==========================================================================
//
// OPL file played by a software OPL2 synth and streamed through the sound system
//
//==========================================================================
class OPLMUSSong : public StreamSource
{
public:
OPLMUSSong (MusicIO::FileInterface *reader, OPLConfig *config);
~OPLMUSSong ();
bool Start() override;
void ChangeSettingInt(const char *name, int value) override;
SoundStreamInfo GetFormat() override;
protected:
bool GetData(void *buffer, size_t len) override;
OPLmusicFile *Music;
int current_opl_core;
};
//==========================================================================
//
//
//
//==========================================================================
OPLMUSSong::OPLMUSSong(MusicIO::FileInterface* reader, OPLConfig* config)
{
const char* error = nullptr;
reader->seek(0, SEEK_END);
auto fs = reader->tell();
reader->seek(0, SEEK_SET);
std::vector<uint8_t> data(fs);
reader->read(data.data(), (int)data.size());
Music = new OPLmusicFile(data.data(), data.size(), config->core, config->numchips, error);
if (error)
{
delete Music;
throw std::runtime_error(error);
}
}
//==========================================================================
//
//
//
//==========================================================================
SoundStreamInfo OPLMUSSong::GetFormat()
{
int samples = int(OPL_SAMPLE_RATE / 14);
return { samples * 4, int(OPL_SAMPLE_RATE), current_opl_core == 0? 1:2 };
}
//==========================================================================
//
//
//
//==========================================================================
OPLMUSSong::~OPLMUSSong ()
{
if (Music != NULL)
{
delete Music;
}
}
//==========================================================================
//
//
//
//==========================================================================
void OPLMUSSong::ChangeSettingInt(const char * name, int val)
{
if (!strcmp(name, "opl.numchips"))
Music->ResetChips (val);
}
//==========================================================================
//
//
//
//==========================================================================
bool OPLMUSSong::Start()
{
Music->SetLooping (m_Looping);
Music->Restart ();
return true;
}
//==========================================================================
//
//
//
//==========================================================================
bool OPLMUSSong::GetData(void *buffer, size_t len)
{
return Music->ServiceStream(buffer, int(len)) ? len : 0;
}
StreamSource *OPL_OpenSong(MusicIO::FileInterface* reader, OPLConfig *config)
{
return new OPLMUSSong(reader, config);
}
#endif