qzdoom/src/oplsynth/music_opldumper_mididevice.cpp

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/*
** music_opl_mididevice.cpp
** Writes raw OPL commands from the emulated OPL MIDI output to disk.
**
**---------------------------------------------------------------------------
** Copyright 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.
**---------------------------------------------------------------------------
**
*/
// HEADER FILES ------------------------------------------------------------
#include "i_musicinterns.h"
#include "templates.h"
#include "doomdef.h"
#include "m_swap.h"
#include "w_wad.h"
#include "fmopl.h"
// MACROS ------------------------------------------------------------------
// TYPES -------------------------------------------------------------------
// EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
// PUBLIC FUNCTION PROTOTYPES ----------------------------------------------
// PRIVATE FUNCTION PROTOTYPES ---------------------------------------------
// EXTERNAL DATA DECLARATIONS ----------------------------------------------
// PRIVATE DATA DEFINITIONS ------------------------------------------------
// PUBLIC DATA DEFINITIONS -------------------------------------------------
// CODE --------------------------------------------------------------------
//==========================================================================
//
// OPLDumperMIDIDevice Constructor
//
//==========================================================================
OPLDumperMIDIDevice::OPLDumperMIDIDevice(const char *filename)
{
// Replace the standard OPL device with a disk writer.
delete io;
io = new DiskWriterIO(filename);
}
//==========================================================================
//
// OPLDumperMIDIDevice Destructor
//
//==========================================================================
OPLDumperMIDIDevice::~OPLDumperMIDIDevice()
{
}
//==========================================================================
//
// OPLDumperMIDIDevice :: Resume
//
//==========================================================================
int OPLDumperMIDIDevice::Resume()
{
int time;
time = PlayTick();
while (time != 0)
{
io->WriteDelay(time);
time = PlayTick();
}
return 0;
}
//==========================================================================
//
// OPLDumperMIDIDevice :: Stop
//
//==========================================================================
void OPLDumperMIDIDevice::Stop()
{
}
//==========================================================================
//
// DiskWriterIO Constructor
//
//==========================================================================
DiskWriterIO::DiskWriterIO(const char *filename)
: Filename(filename)
{
}
//==========================================================================
//
// DiskWriterIO Destructor
//
//==========================================================================
DiskWriterIO::~DiskWriterIO()
{
OPLdeinit();
}
//==========================================================================
//
// DiskWriterIO :: OPLinit
//
//==========================================================================
int DiskWriterIO::OPLinit(uint numchips)
{
// If the file extension is unknown or not present, the default format
// is RAW. Otherwise, you can use DRO.
if (Filename.Len() < 5 || stricmp(&Filename[Filename.Len() - 4], ".dro") != 0)
{
Format = FMT_RDOS;
}
else
{
Format = FMT_DOSBOX;
}
File = fopen(Filename, "wb");
if (File == NULL)
{
Printf("Could not open %s for writing.\n", Filename.GetChars());
return -1;
}
if (Format == FMT_RDOS)
{
fwrite("RAWADATA\0", 1, 10, File);
NeedClockRate = true;
}
else
{
fwrite("DBRAWOPL"
"\0\0" // Minor version number
"\1\0" // Major version number
"\0\0\0\0" // Total milliseconds
"\0\0\0", // Total data
1, 20, File);
if (numchips == 1)
{
fwrite("\0\0\0", 1, 4, File); // Single OPL-2
}
else
{
fwrite("\2\0\0", 1, 4, File); // Dual OPL-2
}
NeedClockRate = false;
}
TimePerTick = 0;
TickMul = 1;
CurTime = 0;
CurIntTime = 0;
CurChip = 0;
OPLchannels = OPL2CHANNELS * numchips;
OPLwriteInitState();
return 0;
}
//==========================================================================
//
// DiskWriterIO :: OPLdeinit
//
//==========================================================================
void DiskWriterIO::OPLdeinit()
{
if (File != NULL)
{
if (Format == FMT_RDOS)
{
WORD endmark = 65535;
fwrite(&endmark, 2, 1, File);
}
else
{
long where_am_i = ftell(File);
DWORD len[2];
fseek(File, 12, SEEK_SET);
len[0] = LittleLong(CurIntTime);
len[1] = LittleLong(where_am_i - 24);
fwrite(len, 4, 2, File);
}
fclose(File);
File = NULL;
}
}
//==========================================================================
//
// DiskWriterIO :: OPLwriteReg
//
//==========================================================================
void DiskWriterIO::OPLwriteReg(int which, uint reg, uchar data)
{
SetChip(which);
if (Format == FMT_RDOS)
{
if (reg != 0 && reg != 2 && (reg != 255 || data != 255))
{
BYTE cmd[2] = { data, reg };
fwrite(cmd, 1, 2, File);
}
}
else
{
BYTE cmd[3] = { 4, reg, data };
fwrite (cmd + (reg > 4), 1, 3 - (reg > 4), File);
}
}
//==========================================================================
//
// DiskWriterIO :: SetChip
//
//==========================================================================
void DiskWriterIO :: SetChip(int chipnum)
{
assert(chipnum == 0 || chipnum == 1);
if (chipnum != CurChip)
{
CurChip = chipnum;
if (Format == FMT_RDOS)
{
BYTE switcher[2] = { chipnum + 1, 2 };
fwrite(switcher, 1, 2, File);
}
else
{
BYTE switcher = chipnum + 2;
fwrite(&switcher, 1, 1, File);
}
}
}
//==========================================================================
//
// DiskWriterIO :: SetClockRate
//
//==========================================================================
void DiskWriterIO::SetClockRate(double samples_per_tick)
{
TimePerTick = samples_per_tick / OPL_SAMPLE_RATE * 1000.0;
if (Format == FMT_RDOS)
{
double clock_rate;
int clock_mul;
WORD clock_word;
clock_rate = samples_per_tick * ADLIB_CLOCK_MUL;
clock_mul = 1;
// The RDos raw format's clock rate is stored in a word. Therefore,
// the longest tick that can be stored is only ~55 ms.
while (clock_rate / clock_mul + 0.5 > 65535.0)
{
clock_mul++;
}
clock_word = WORD(clock_rate / clock_mul + 0.5);
if (NeedClockRate)
{ // Set the initial clock rate.
clock_word = LittleShort(clock_word);
fseek(File, 8, SEEK_SET);
fwrite(&clock_word, 2, 1, File);
fseek(File, 0, SEEK_END);
NeedClockRate = false;
}
else
{ // Change the clock rate in the middle of the song.
BYTE clock_change[4] = { 0, 2, clock_word & 255, clock_word >> 8 };
fwrite(clock_change, 1, 4, File);
}
}
}
//==========================================================================
//
// DiskWriterIO :: WriteDelay
//
//==========================================================================
void DiskWriterIO :: WriteDelay(int ticks)
{
if (ticks <= 0)
{
return;
}
if (Format == FMT_RDOS)
{ // RDos raw has very precise delays but isn't very efficient at
// storing long delays.
BYTE delay[2];
ticks *= TickMul;
delay[1] = 0;
while (ticks > 255)
{
ticks -= 255;
delay[0] = 255;
fwrite(delay, 1, 2, File);
}
delay[0] = BYTE(ticks);
fwrite(delay, 1, 2, File);
}
else
{ // DosBox only has millisecond-precise delays.
int delay;
CurTime += TimePerTick * ticks;
delay = int(CurTime + 0.5) - CurIntTime;
CurIntTime += delay;
while (delay > 65536)
{
BYTE cmd[3] = { 1, 255, 255 };
fwrite(cmd, 1, 2, File);
delay -= 65536;
}
delay--;
if (delay <= 255)
{
BYTE cmd[2] = { 0, BYTE(delay) };
fwrite(cmd, 1, 2, File);
}
else
{
assert(delay <= 65535);
BYTE cmd[3] = { 1, BYTE(delay & 255), BYTE(delay >> 8) };
fwrite(cmd, 1, 3, File);
}
}
}