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42f732798d
Mono streams could be erroneously treated as stereo, doubling their playback speed https://forum.zdoom.org/viewtopic.php?t=66939
152 lines
4.5 KiB
C++
152 lines
4.5 KiB
C++
/*
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** music_opl.cpp
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** Plays raw OPL formats
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**
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**---------------------------------------------------------------------------
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** Copyright 1998-2008 Randy Heit
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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*/
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#include "streamsource.h"
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#include "oplsynth/opl.h"
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#include "oplsynth/opl_mus_player.h"
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#include "../../libraries/music_common/fileio.h"
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#include "zmusic/midiconfig.h"
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//==========================================================================
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//
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// OPL file played by a software OPL2 synth and streamed through the sound system
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//
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//==========================================================================
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class OPLMUSSong : public StreamSource
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{
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public:
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OPLMUSSong (MusicIO::FileInterface *reader, OPLConfig *config);
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~OPLMUSSong ();
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bool Start() override;
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void ChangeSettingInt(const char *name, int value) override;
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SoundStreamInfo GetFormat() override;
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protected:
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bool GetData(void *buffer, size_t len) override;
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OPLmusicFile *Music;
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int current_opl_core;
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};
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//==========================================================================
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//
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//
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//
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//==========================================================================
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OPLMUSSong::OPLMUSSong(MusicIO::FileInterface* reader, OPLConfig* config)
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{
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const char* error = nullptr;
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reader->seek(0, SEEK_END);
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auto fs = reader->tell();
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reader->seek(0, SEEK_SET);
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std::vector<uint8_t> data(fs);
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reader->read(data.data(), (int)data.size());
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Music = new OPLmusicFile(data.data(), data.size(), config->core, config->numchips, error);
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if (error)
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{
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delete Music;
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throw std::runtime_error(error);
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}
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current_opl_core = config->core;
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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SoundStreamInfo OPLMUSSong::GetFormat()
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{
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int samples = int(OPL_SAMPLE_RATE / 14);
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return { samples * 4, int(OPL_SAMPLE_RATE), current_opl_core == 0? 1:2 };
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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OPLMUSSong::~OPLMUSSong ()
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{
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if (Music != NULL)
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{
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delete Music;
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}
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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void OPLMUSSong::ChangeSettingInt(const char * name, int val)
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{
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if (!strcmp(name, "opl.numchips"))
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Music->ResetChips (val);
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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bool OPLMUSSong::Start()
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{
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Music->SetLooping (m_Looping);
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Music->Restart ();
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return true;
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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bool OPLMUSSong::GetData(void *buffer, size_t len)
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{
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return Music->ServiceStream(buffer, int(len)) ? len : 0;
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}
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StreamSource *OPL_OpenSong(MusicIO::FileInterface* reader, OPLConfig *config)
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{
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return new OPLMUSSong(reader, config);
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}
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