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https://github.com/ZDoom/gzdoom-gles.git
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9b61ee9618
This was done after the players had already been created. To ensure that everything gets set properly it is necessary to pass the desired sample rate to the device's constructor and let it make sure that a proper sample rate gets set.
455 lines
11 KiB
C++
455 lines
11 KiB
C++
/*
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** music_softsynth_mididevice.cpp
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** Common base class for software synthesis MIDI devices.
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**
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**---------------------------------------------------------------------------
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** Copyright 2008-2010 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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#include "i_musicinterns.h"
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#include "templates.h"
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#include "doomdef.h"
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#include "m_swap.h"
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#include "w_wad.h"
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#include "v_text.h"
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#include "i_system.h"
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// MACROS ------------------------------------------------------------------
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// TYPES -------------------------------------------------------------------
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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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// PRIVATE DATA DEFINITIONS ------------------------------------------------
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// PUBLIC DATA DEFINITIONS -------------------------------------------------
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CVAR(Bool, synth_watch, false, 0)
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// CODE --------------------------------------------------------------------
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//==========================================================================
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//
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// SoftSynthMIDIDevice Constructor
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//
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//==========================================================================
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SoftSynthMIDIDevice::SoftSynthMIDIDevice(int samplerate, int minrate, int maxrate)
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{
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Stream = NULL;
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Tempo = 0;
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Division = 0;
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Events = NULL;
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Started = false;
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SampleRate = samplerate;
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if (SampleRate < minrate || SampleRate > maxrate) SampleRate = GSnd != NULL ? clamp((int)GSnd->GetOutputRate(), minrate, maxrate) : 44100;
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}
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//==========================================================================
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//
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// SoftSynthMIDIDevice Destructor
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//
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//==========================================================================
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SoftSynthMIDIDevice::~SoftSynthMIDIDevice()
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{
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Close();
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}
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//==========================================================================
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//
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// SoftSynthMIDIDevice :: OpenStream
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//
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//==========================================================================
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int SoftSynthMIDIDevice::OpenStream(int chunks, int flags, MidiCallback callback, void *userdata)
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{
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int chunksize = (SampleRate / chunks) * 4;
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if (!(flags & SoundStream::Mono))
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{
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chunksize *= 2;
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}
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Stream = GSnd->CreateStream(FillStream, chunksize, SoundStream::Float | flags, SampleRate, this);
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if (Stream == NULL)
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{
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return 2;
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}
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Callback = callback;
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CallbackData = userdata;
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Tempo = 500000;
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Division = 100;
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CalcTickRate();
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return 0;
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}
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//==========================================================================
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//
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// SoftSynthMIDIDevice :: Close
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//
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//==========================================================================
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void SoftSynthMIDIDevice::Close()
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{
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if (Stream != NULL)
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{
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delete Stream;
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Stream = NULL;
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}
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Started = false;
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}
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//==========================================================================
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//
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// SoftSynthMIDIDevice :: IsOpen
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//
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//==========================================================================
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bool SoftSynthMIDIDevice::IsOpen() const
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{
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return Stream != NULL;
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}
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//==========================================================================
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//
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// SoftSynthMIDIDevice :: GetTechnology
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//
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//==========================================================================
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int SoftSynthMIDIDevice::GetTechnology() const
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{
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return MIDIDEV_SWSYNTH;
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}
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//==========================================================================
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//
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// SoftSynthMIDIDevice :: SetTempo
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//
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//==========================================================================
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int SoftSynthMIDIDevice::SetTempo(int tempo)
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{
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Tempo = tempo;
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CalcTickRate();
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return 0;
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}
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//==========================================================================
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//
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// SoftSynthMIDIDevice :: SetTimeDiv
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//
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//==========================================================================
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int SoftSynthMIDIDevice::SetTimeDiv(int timediv)
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{
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Division = timediv;
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CalcTickRate();
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return 0;
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}
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//==========================================================================
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//
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// SoftSynthMIDIDevice :: CalcTickRate
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//
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// Tempo is the number of microseconds per quarter note.
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// Division is the number of ticks per quarter note.
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//
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//==========================================================================
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void SoftSynthMIDIDevice::CalcTickRate()
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{
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SamplesPerTick = SampleRate / (1000000.0 / Tempo) / Division;
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}
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//==========================================================================
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//
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// SoftSynthMIDIDevice :: Resume
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//
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//==========================================================================
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int SoftSynthMIDIDevice::Resume()
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{
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if (!Started)
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{
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if (Stream->Play(true, 1))
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{
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Started = true;
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return 0;
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}
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return 1;
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}
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return 0;
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}
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//==========================================================================
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//
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// SoftSynthMIDIDevice :: Stop
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//
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//==========================================================================
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void SoftSynthMIDIDevice::Stop()
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{
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if (Started)
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{
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Stream->Stop();
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Started = false;
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}
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}
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//==========================================================================
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//
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// SoftSynthMIDIDevice :: StreamOutSync
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//
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// This version is called from the main game thread and needs to
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// synchronize with the player thread.
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//
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//==========================================================================
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int SoftSynthMIDIDevice::StreamOutSync(MidiHeader *header)
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{
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CritSec.Enter();
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StreamOut(header);
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CritSec.Leave();
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return 0;
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}
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//==========================================================================
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//
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// SoftSynthMIDIDevice :: StreamOut
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//
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// This version is called from the player thread so does not need to
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// arbitrate for access to the Events pointer.
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//
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//==========================================================================
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int SoftSynthMIDIDevice::StreamOut(MidiHeader *header)
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{
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header->lpNext = NULL;
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if (Events == NULL)
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{
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Events = header;
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NextTickIn = SamplesPerTick * *(uint32_t *)header->lpData;
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Position = 0;
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}
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else
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{
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MidiHeader **p;
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for (p = &Events; *p != NULL; p = &(*p)->lpNext)
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{ }
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*p = header;
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}
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return 0;
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}
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//==========================================================================
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//
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// SoftSynthMIDIDevice :: Pause
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//
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//==========================================================================
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bool SoftSynthMIDIDevice::Pause(bool paused)
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{
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if (Stream != NULL)
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{
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return Stream->SetPaused(paused);
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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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// SoftSynthMIDIDevice :: PlayTick
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//
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// event[0] = delta time
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// event[1] = unused
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// event[2] = event
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//
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//==========================================================================
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int SoftSynthMIDIDevice::PlayTick()
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{
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uint32_t delay = 0;
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while (delay == 0 && Events != NULL)
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{
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uint32_t *event = (uint32_t *)(Events->lpData + Position);
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if (MEVENT_EVENTTYPE(event[2]) == MEVENT_TEMPO)
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{
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SetTempo(MEVENT_EVENTPARM(event[2]));
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}
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else if (MEVENT_EVENTTYPE(event[2]) == MEVENT_LONGMSG)
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{
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HandleLongEvent((uint8_t *)&event[3], MEVENT_EVENTPARM(event[2]));
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}
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else if (MEVENT_EVENTTYPE(event[2]) == 0)
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{ // Short MIDI event
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int status = event[2] & 0xff;
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int parm1 = (event[2] >> 8) & 0x7f;
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int parm2 = (event[2] >> 16) & 0x7f;
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HandleEvent(status, parm1, parm2);
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if (synth_watch)
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{
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static const char *const commands[8] =
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{
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"Note off",
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"Note on",
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"Poly press",
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"Ctrl change",
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"Prgm change",
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"Chan press",
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"Pitch bend",
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"SysEx"
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};
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char buffer[128];
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mysnprintf(buffer, countof(buffer), "C%02d: %11s %3d %3d\n", (status & 15) + 1, commands[(status >> 4) & 7], parm1, parm2);
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#ifdef _WIN32
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I_DebugPrint(buffer);
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#else
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fputs(buffer, stderr);
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#endif
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}
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}
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// Advance to next event.
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if (event[2] < 0x80000000)
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{ // Short message
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Position += 12;
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}
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else
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{ // Long message
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Position += 12 + ((MEVENT_EVENTPARM(event[2]) + 3) & ~3);
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}
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// Did we use up this buffer?
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if (Position >= Events->dwBytesRecorded)
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{
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Events = Events->lpNext;
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Position = 0;
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if (Callback != NULL)
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{
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Callback(CallbackData);
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}
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}
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if (Events == NULL)
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{ // No more events. Just return something to keep the song playing
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// while we wait for more to be submitted.
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return int(Division);
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}
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delay = *(uint32_t *)(Events->lpData + Position);
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}
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return delay;
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}
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//==========================================================================
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//
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// SoftSynthMIDIDevice :: ServiceStream
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//
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//==========================================================================
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bool SoftSynthMIDIDevice::ServiceStream (void *buff, int numbytes)
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{
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float *samples = (float *)buff;
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float *samples1;
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int numsamples = numbytes / sizeof(float) / 2;
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bool prev_ended = false;
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bool res = true;
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samples1 = samples;
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memset(buff, 0, numbytes);
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CritSec.Enter();
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while (Events != NULL && numsamples > 0)
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{
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double ticky = NextTickIn;
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int tick_in = int(NextTickIn);
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int samplesleft = MIN(numsamples, tick_in);
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if (samplesleft > 0)
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{
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ComputeOutput(samples1, samplesleft);
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assert(NextTickIn == ticky);
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NextTickIn -= samplesleft;
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assert(NextTickIn >= 0);
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numsamples -= samplesleft;
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samples1 += samplesleft * 2;
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}
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if (NextTickIn < 1)
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{
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int next = PlayTick();
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assert(next >= 0);
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if (next == 0)
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{ // end of song
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if (numsamples > 0)
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{
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ComputeOutput(samples1, numsamples);
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}
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res = false;
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break;
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}
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else
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{
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NextTickIn += SamplesPerTick * next;
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assert(NextTickIn >= 0);
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}
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}
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}
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if (Events == NULL)
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{
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res = false;
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}
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CritSec.Leave();
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return res;
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}
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//==========================================================================
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//
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// SoftSynthMIDIDevice :: FillStream static
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//
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//==========================================================================
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bool SoftSynthMIDIDevice::FillStream(SoundStream *stream, void *buff, int len, void *userdata)
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{
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SoftSynthMIDIDevice *device = (SoftSynthMIDIDevice *)userdata;
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return device->ServiceStream(buff, len);
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}
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