mirror of https://github.com/ZDoom/qzdoom.git
359 lines
8.8 KiB
C++
359 lines
8.8 KiB
C++
/*
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** music_gme.cpp
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** General game music player, using Game Music Emu for decoding.
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**
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**---------------------------------------------------------------------------
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** Copyright 2009 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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*/
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// HEADER FILES ------------------------------------------------------------
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// Uncomment if you are using the DLL version of GME.
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//#define GME_DLL
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#include "i_musicinterns.h"
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#include "c_cvars.h"
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#include "critsec.h"
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#include "gme.h"
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#include "v_text.h"
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// MACROS ------------------------------------------------------------------
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// TYPES -------------------------------------------------------------------
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class GMESong : public StreamSong
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{
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public:
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GMESong(Music_Emu *emu, int sample_rate);
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~GMESong();
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bool SetSubsong(int subsong);
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void Play(bool looping, int subsong);
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FString GetStats();
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protected:
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FCriticalSection CritSec;
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Music_Emu *Emu;
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gme_info_t *TrackInfo;
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int SampleRate;
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int CurrTrack;
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bool StartTrack(int track, bool getcritsec=true);
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bool GetTrackInfo();
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int CalcSongLength();
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static bool Read(SoundStream *stream, void *buff, int len, void *userdata);
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};
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// EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
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// PUBLIC FUNCTION PROTOTYPES ----------------------------------------------
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// PRIVATE FUNCTION PROTOTYPES ---------------------------------------------
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// EXTERNAL DATA DECLARATIONS ----------------------------------------------
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// PUBLIC DATA DEFINITIONS -------------------------------------------------
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// Currently not used.
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CVAR (Float, spc_amp, 1.875f, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
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// PRIVATE DATA DEFINITIONS ------------------------------------------------
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// CODE --------------------------------------------------------------------
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//==========================================================================
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//
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// GME_CheckFormat
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//
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//==========================================================================
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const char *GME_CheckFormat(uint32 id)
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{
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return gme_identify_header(&id);
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}
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//==========================================================================
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//
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// GME_OpenSong
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//
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//==========================================================================
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MusInfo *GME_OpenSong(FILE *file, BYTE *musiccache, int len, const char *fmt)
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{
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gme_type_t type;
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gme_err_t err;
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BYTE *song;
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Music_Emu *emu;
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int sample_rate;
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type = gme_identify_extension(fmt);
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if (type == NULL)
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{
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return NULL;
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}
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sample_rate = (int)GSnd->GetOutputRate();
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emu = gme_new_emu(type, sample_rate);
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if (emu == NULL)
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{
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return NULL;
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}
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if (musiccache != NULL)
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{
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song = musiccache;
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}
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else
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{
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song = new BYTE[len];
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if (fread(song, 1, len, file) != (size_t)len)
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{
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delete[] song;
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gme_delete(emu);
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return NULL;
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}
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}
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err = gme_load_data(emu, song, len);
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if (song != musiccache)
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{
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delete[] song;
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}
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if (err != NULL)
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{
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Printf("Failed loading song: %s\n", err);
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gme_delete(emu);
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return NULL;
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}
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return new GMESong(emu, sample_rate);
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}
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//==========================================================================
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//
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// GMESong - Constructor
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//
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//==========================================================================
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GMESong::GMESong(Music_Emu *emu, int sample_rate)
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{
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Emu = emu;
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SampleRate = sample_rate;
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CurrTrack = 0;
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TrackInfo = NULL;
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m_Stream = GSnd->CreateStream(Read, 32*1024, 0, sample_rate, this);
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}
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//==========================================================================
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//
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// GMESong - Destructor
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//
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//==========================================================================
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GMESong::~GMESong()
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{
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Stop();
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if (m_Stream != NULL)
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{
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delete m_Stream;
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m_Stream = NULL;
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}
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if (TrackInfo != NULL)
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{
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gme_free_info(TrackInfo);
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}
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if (Emu != NULL)
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{
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gme_delete(Emu);
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}
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}
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//==========================================================================
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//
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// GMESong :: Play
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//
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//==========================================================================
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void GMESong::Play(bool looping, int track)
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{
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m_Status = STATE_Stopped;
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m_Looping = looping;
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if (StartTrack(track) && m_Stream->Play(looping, 1))
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{
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m_Status = STATE_Playing;
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}
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}
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//==========================================================================
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//
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// GMESong :: SetSubsong
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//
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//==========================================================================
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bool GMESong::SetSubsong(int track)
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{
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if (CurrTrack == track)
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{
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return false;
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}
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return StartTrack(track);
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}
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//==========================================================================
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//
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// GMESong :: StartTrack
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//
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//==========================================================================
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bool GMESong::StartTrack(int track, bool getcritsec)
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{
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gme_err_t err;
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if (getcritsec)
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{
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CritSec.Enter();
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}
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err = gme_start_track(Emu, track);
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if (getcritsec)
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{
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CritSec.Leave();
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}
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if (err != NULL)
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{
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Printf("Could not start track %d: %s\n", track, err);
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return false;
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}
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CurrTrack = track;
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GetTrackInfo();
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if (!m_Looping)
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{
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gme_set_fade(Emu, CalcSongLength());
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}
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return true;
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}
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//==========================================================================
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//
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// GMESong :: GetStats
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//
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//==========================================================================
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FString GMESong::GetStats()
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{
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FString out;
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if (TrackInfo != NULL)
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{
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int time = gme_tell(Emu);
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out.Format(
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"Track: " TEXTCOLOR_YELLOW "%d" TEXTCOLOR_NORMAL
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" Time:" TEXTCOLOR_YELLOW "%3d:%02d:%03d" TEXTCOLOR_NORMAL
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" System: " TEXTCOLOR_YELLOW "%s" TEXTCOLOR_NORMAL,
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CurrTrack,
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time/60000,
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(time/1000) % 60,
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time % 1000,
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TrackInfo->system);
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}
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return out;
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}
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//==========================================================================
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//
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// GMESong :: GetTrackInfo
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//
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//==========================================================================
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bool GMESong::GetTrackInfo()
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{
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gme_err_t err;
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if (TrackInfo != NULL)
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{
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gme_free_info(TrackInfo);
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TrackInfo = NULL;
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}
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err = gme_track_info(Emu, &TrackInfo, CurrTrack);
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if (err != NULL)
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{
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Printf("Could not get track %d info: %s\n", CurrTrack, err);
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return false;
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}
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return true;
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}
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//==========================================================================
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//
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// GMESong :: CalcSongLength
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//
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//==========================================================================
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int GMESong::CalcSongLength()
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{
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if (TrackInfo == NULL)
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{
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return 150000;
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}
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if (TrackInfo->length > 0)
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{
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return TrackInfo->length;
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}
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if (TrackInfo->loop_length > 0)
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{
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return TrackInfo->intro_length + TrackInfo->loop_length * 2;
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}
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return 150000;
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}
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//==========================================================================
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//
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// GMESong :: Read STATIC
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//
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//==========================================================================
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bool GMESong::Read(SoundStream *stream, void *buff, int len, void *userdata)
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{
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gme_err_t err;
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GMESong *song = (GMESong *)userdata;
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song->CritSec.Enter();
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if (gme_track_ended(song->Emu))
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{
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if (song->m_Looping)
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{
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song->StartTrack(song->CurrTrack, false);
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}
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else
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{
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memset(buff, 0, len);
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return false;
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}
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}
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err = gme_play(song->Emu, len >> 1, (short *)buff);
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song->CritSec.Leave();
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return (err == NULL);
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}
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