ref: b33ff7e96c5c410f722808314579810f23c86cd8
dir: /src/i_winmusic.c/
//
// Copyright(C) 2021-2022 Roman Fomin
// Copyright(C) 2022 ceski
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// DESCRIPTION:
// Windows native MIDI
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <mmsystem.h>
#include <mmreg.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "doomtype.h"
#include "i_sound.h"
#include "i_system.h"
#include "m_misc.h"
#include "memio.h"
#include "mus2mid.h"
#include "midifile.h"
#include "midifallback.h"
char *winmm_midi_device = NULL;
int winmm_reverb_level = -1;
int winmm_chorus_level = -1;
enum
{
RESET_TYPE_DEFAULT = -1,
RESET_TYPE_NONE,
RESET_TYPE_GS,
RESET_TYPE_GM,
RESET_TYPE_GM2,
RESET_TYPE_XG,
};
int winmm_reset_type = RESET_TYPE_DEFAULT;
int winmm_reset_delay = 0;
static const byte gs_reset[] = {
0xF0, 0x41, 0x10, 0x42, 0x12, 0x40, 0x00, 0x7F, 0x00, 0x41, 0xF7
};
static const byte gm_system_on[] = {
0xF0, 0x7E, 0x7F, 0x09, 0x01, 0xF7
};
static const byte gm2_system_on[] = {
0xF0, 0x7E, 0x7F, 0x09, 0x03, 0xF7
};
static const byte xg_system_on[] = {
0xF0, 0x43, 0x10, 0x4C, 0x00, 0x00, 0x7E, 0x00, 0xF7
};
static const byte ff_loopStart[] = {'l', 'o', 'o', 'p', 'S', 't', 'a', 'r', 't'};
static const byte ff_loopEnd[] = {'l', 'o', 'o', 'p', 'E', 'n', 'd'};
static boolean use_fallback;
#define DEFAULT_VOLUME 100
static int channel_volume[MIDI_CHANNELS_PER_TRACK];
static float volume_factor = 0.0f;
static boolean update_volume = false;
static DWORD timediv;
static DWORD tempo;
static UINT MidiDevice;
static HMIDISTRM hMidiStream;
static MIDIHDR MidiStreamHdr;
static HANDLE hBufferReturnEvent;
static HANDLE hExitEvent;
static HANDLE hPlayerThread;
// MS GS Wavetable Synth Device ID.
static int ms_gs_synth = MIDI_MAPPER;
// EMIDI device for track designation.
static int emidi_device;
// This is a reduced Windows MIDIEVENT structure for MEVT_F_SHORT
// type of events.
typedef struct
{
DWORD dwDeltaTime;
DWORD dwStreamID; // always 0
DWORD dwEvent;
} native_event_t;
typedef struct
{
midi_track_iter_t *iter;
unsigned int elapsed_time;
unsigned int saved_elapsed_time;
boolean end_of_track;
boolean saved_end_of_track;
unsigned int emidi_device_flags;
boolean emidi_designated;
boolean emidi_program;
boolean emidi_volume;
int emidi_loop_count;
} win_midi_track_t;
typedef struct
{
win_midi_track_t *tracks;
unsigned int elapsed_time;
unsigned int saved_elapsed_time;
unsigned int num_tracks;
boolean registered;
boolean looping;
boolean ff_loop;
boolean ff_restart;
boolean rpg_loop;
} win_midi_song_t;
static win_midi_song_t song;
#define BUFFER_INITIAL_SIZE 1024
typedef struct
{
byte *data;
unsigned int size;
unsigned int position;
} buffer_t;
static buffer_t buffer;
// Maximum of 4 events in the buffer for faster volume updates.
#define STREAM_MAX_EVENTS 4
#define MAKE_EVT(a, b, c, d) ((DWORD)((a) | ((b) << 8) | ((c) << 16) | ((d) << 24)))
#define PADDED_SIZE(x) (((x) + sizeof(DWORD) - 1) & ~(sizeof(DWORD) - 1))
static boolean initial_playback = false;
// Message box for midiStream errors.
static void MidiError(const char *prefix, DWORD dwError)
{
char szErrorBuf[MAXERRORLENGTH];
MMRESULT mmr;
mmr = midiOutGetErrorText(dwError, (LPSTR) szErrorBuf, MAXERRORLENGTH);
if (mmr == MMSYSERR_NOERROR)
{
char *msg = M_StringJoin(prefix, ": ", szErrorBuf, NULL);
MessageBox(NULL, msg, "midiStream Error", MB_ICONEXCLAMATION);
free(msg);
}
else
{
fprintf(stderr, "%s: Unknown midiStream error.\n", prefix);
}
}
// midiStream callback.
static void CALLBACK MidiStreamProc(HMIDIOUT hMidi, UINT uMsg,
DWORD_PTR dwInstance, DWORD_PTR dwParam1,
DWORD_PTR dwParam2)
{
if (uMsg == MOM_DONE)
{
SetEvent(hBufferReturnEvent);
}
}
static void AllocateBuffer(const unsigned int size)
{
MIDIHDR *hdr = &MidiStreamHdr;
MMRESULT mmr;
if (buffer.data)
{
mmr = midiOutUnprepareHeader((HMIDIOUT)hMidiStream, hdr, sizeof(MIDIHDR));
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiOutUnprepareHeader", mmr);
}
}
buffer.size = PADDED_SIZE(size);
buffer.data = I_Realloc(buffer.data, buffer.size);
hdr->lpData = (LPSTR)buffer.data;
hdr->dwBytesRecorded = 0;
hdr->dwBufferLength = buffer.size;
mmr = midiOutPrepareHeader((HMIDIOUT)hMidiStream, hdr, sizeof(MIDIHDR));
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiOutPrepareHeader", mmr);
}
}
static void WriteBufferPad(void)
{
unsigned int padding = PADDED_SIZE(buffer.position);
memset(buffer.data + buffer.position, 0, padding - buffer.position);
buffer.position = padding;
}
static void WriteBuffer(const byte *ptr, unsigned int size)
{
if (buffer.position + size >= buffer.size)
{
AllocateBuffer(size + buffer.size * 2);
}
memcpy(buffer.data + buffer.position, ptr, size);
buffer.position += size;
}
static void StreamOut(void)
{
MIDIHDR *hdr = &MidiStreamHdr;
MMRESULT mmr;
hdr->lpData = (LPSTR)buffer.data;
hdr->dwBytesRecorded = buffer.position;
mmr = midiStreamOut(hMidiStream, hdr, sizeof(MIDIHDR));
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiStreamOut", mmr);
}
}
static void SendShortMsg(int time, int status, int channel, int param1, int param2)
{
native_event_t native_event;
native_event.dwDeltaTime = time;
native_event.dwStreamID = 0;
native_event.dwEvent = MAKE_EVT(status | channel, param1, param2, MEVT_SHORTMSG);
WriteBuffer((byte *)&native_event, sizeof(native_event_t));
}
static void SendLongMsg(int time, const byte *ptr, int length)
{
native_event_t native_event;
native_event.dwDeltaTime = time;
native_event.dwStreamID = 0;
native_event.dwEvent = MAKE_EVT(length, 0, 0, MEVT_LONGMSG);
WriteBuffer((byte *)&native_event, sizeof(native_event_t));
WriteBuffer(ptr, length);
WriteBufferPad();
}
static void SendNOPMsg(int time)
{
native_event_t native_event;
native_event.dwDeltaTime = time;
native_event.dwStreamID = 0;
native_event.dwEvent = MAKE_EVT(0, 0, 0, MEVT_NOP);
WriteBuffer((byte *)&native_event, sizeof(native_event_t));
}
static void SendDelayMsg(int time_ms)
{
// Convert ms to ticks (see "Standard MIDI Files 1.0" page 14).
int time_ticks = (float)time_ms * 1000 * timediv / tempo + 0.5f;
SendNOPMsg(time_ticks);
}
static void UpdateTempo(int time, midi_event_t *event)
{
native_event_t native_event;
tempo = MAKE_EVT(event->data.meta.data[2], event->data.meta.data[1],
event->data.meta.data[0], 0);
native_event.dwDeltaTime = time;
native_event.dwStreamID = 0;
native_event.dwEvent = MAKE_EVT(tempo, 0, 0, MEVT_TEMPO);
WriteBuffer((byte *)&native_event, sizeof(native_event_t));
}
static void SendVolumeMsg(int time, int channel, int volume)
{
int scaled_volume = volume * volume_factor + 0.5f;
SendShortMsg(time, MIDI_EVENT_CONTROLLER, channel,
MIDI_CONTROLLER_VOLUME_MSB, scaled_volume);
channel_volume[channel] = volume;
}
static void UpdateVolume(void)
{
int i;
for (i = 0; i < MIDI_CHANNELS_PER_TRACK; ++i)
{
SendVolumeMsg(0, i, channel_volume[i]);
}
}
static void ResetVolume(void)
{
int i;
for (i = 0; i < MIDI_CHANNELS_PER_TRACK; ++i)
{
SendVolumeMsg(0, i, DEFAULT_VOLUME);
}
}
static void ResetReverb(int reset_type)
{
int i;
int reverb = winmm_reverb_level;
if (reverb == -1 && reset_type == RESET_TYPE_NONE)
{
// No reverb specified and no SysEx reset selected. Use GM default.
reverb = 40;
}
if (reverb > -1)
{
for (i = 0; i < MIDI_CHANNELS_PER_TRACK; ++i)
{
SendShortMsg(0, MIDI_EVENT_CONTROLLER, i, MIDI_CONTROLLER_REVERB, reverb);
}
}
}
static void ResetChorus(int reset_type)
{
int i;
int chorus = winmm_chorus_level;
if (chorus == -1 && reset_type == RESET_TYPE_NONE)
{
// No chorus specified and no SysEx reset selected. Use GM default.
chorus = 0;
}
if (chorus > -1)
{
for (i = 0; i < MIDI_CHANNELS_PER_TRACK; ++i)
{
SendShortMsg(0, MIDI_EVENT_CONTROLLER, i, MIDI_CONTROLLER_CHORUS, chorus);
}
}
}
static void ResetControllers(void)
{
int i;
for (i = 0; i < MIDI_CHANNELS_PER_TRACK; ++i)
{
// Reset commonly used controllers.
SendShortMsg(0, MIDI_EVENT_CONTROLLER, i, MIDI_CONTROLLER_RESET_ALL_CTRLS, 0);
SendShortMsg(0, MIDI_EVENT_CONTROLLER, i, MIDI_CONTROLLER_PAN, 64);
SendShortMsg(0, MIDI_EVENT_CONTROLLER, i, MIDI_CONTROLLER_BANK_SELECT_MSB, 0);
SendShortMsg(0, MIDI_EVENT_CONTROLLER, i, MIDI_CONTROLLER_BANK_SELECT_LSB, 0);
SendShortMsg(0, MIDI_EVENT_PROGRAM_CHANGE, i, 0, 0);
}
}
static void ResetPitchBendSensitivity(void)
{
int i;
for (i = 0; i < MIDI_CHANNELS_PER_TRACK; ++i)
{
// Set RPN MSB/LSB to pitch bend sensitivity.
SendShortMsg(0, MIDI_EVENT_CONTROLLER, i, MIDI_CONTROLLER_RPN_LSB, 0);
SendShortMsg(0, MIDI_EVENT_CONTROLLER, i, MIDI_CONTROLLER_RPN_MSB, 0);
// Reset pitch bend sensitivity to +/- 2 semitones and 0 cents.
SendShortMsg(0, MIDI_EVENT_CONTROLLER, i, MIDI_CONTROLLER_DATA_ENTRY_MSB, 2);
SendShortMsg(0, MIDI_EVENT_CONTROLLER, i, MIDI_CONTROLLER_DATA_ENTRY_LSB, 0);
// Set RPN MSB/LSB to null value after data entry.
SendShortMsg(0, MIDI_EVENT_CONTROLLER, i, MIDI_CONTROLLER_RPN_LSB, 127);
SendShortMsg(0, MIDI_EVENT_CONTROLLER, i, MIDI_CONTROLLER_RPN_MSB, 127);
}
}
static void ResetDevice(void)
{
int i;
int reset_type;
for (i = 0; i < MIDI_CHANNELS_PER_TRACK; ++i)
{
// Stop sound prior to reset to prevent volume spikes.
SendShortMsg(0, MIDI_EVENT_CONTROLLER, i, MIDI_CONTROLLER_ALL_NOTES_OFF, 0);
SendShortMsg(0, MIDI_EVENT_CONTROLLER, i, MIDI_CONTROLLER_ALL_SOUND_OFF, 0);
}
if (MidiDevice == ms_gs_synth)
{
// MS GS Wavetable Synth lacks instrument fallback in GS mode which can
// cause wrong or silent notes (MAYhem19.wad D_DM2TTL). It also responds
// to XG System On when it should ignore it.
switch (winmm_reset_type)
{
case RESET_TYPE_NONE:
reset_type = RESET_TYPE_NONE;
break;
case RESET_TYPE_GS:
reset_type = RESET_TYPE_GS;
break;
default:
reset_type = RESET_TYPE_GM;
break;
}
}
else // Unknown device
{
// Most devices support GS mode. Exceptions are some older hardware and
// a few older VSTis. Some devices lack instrument fallback in GS mode.
switch (winmm_reset_type)
{
case RESET_TYPE_NONE:
case RESET_TYPE_GM:
case RESET_TYPE_GM2:
case RESET_TYPE_XG:
reset_type = winmm_reset_type;
break;
default:
reset_type = RESET_TYPE_GS;
break;
}
}
// Use instrument fallback in GS mode.
MIDI_ResetFallback();
use_fallback = (reset_type == RESET_TYPE_GS);
// Assign EMIDI device for track designation.
emidi_device = (reset_type == RESET_TYPE_GS);
switch (reset_type)
{
case RESET_TYPE_NONE:
ResetControllers();
break;
case RESET_TYPE_GS:
SendLongMsg(0, gs_reset, sizeof(gs_reset));
break;
case RESET_TYPE_GM:
SendLongMsg(0, gm_system_on, sizeof(gm_system_on));
break;
case RESET_TYPE_GM2:
SendLongMsg(0, gm2_system_on, sizeof(gm2_system_on));
break;
case RESET_TYPE_XG:
SendLongMsg(0, xg_system_on, sizeof(xg_system_on));
break;
}
if (reset_type == RESET_TYPE_NONE || MidiDevice == ms_gs_synth)
{
// MS GS Wavetable Synth doesn't reset pitch bend sensitivity, even
// when sending a GM/GS reset, so do it manually.
ResetPitchBendSensitivity();
}
ResetReverb(reset_type);
ResetChorus(reset_type);
// Reset volume (initial playback or on shutdown if no SysEx reset).
if (initial_playback || reset_type == RESET_TYPE_NONE)
{
// Scale by slider on initial playback, max on shutdown.
volume_factor = initial_playback ? volume_factor : 1.0f;
ResetVolume();
}
// Send delay after reset. This is for hardware devices only (e.g. SC-55).
if (winmm_reset_delay > 0)
{
SendDelayMsg(winmm_reset_delay);
}
}
static boolean IsSysExReset(const byte *msg, int length)
{
if (length < 5)
{
return false;
}
switch (msg[0])
{
case 0x41: // Roland
switch (msg[2])
{
case 0x42: // GS
switch (msg[3])
{
case 0x12: // DT1
if (length == 10 &&
msg[4] == 0x00 && // Address MSB
msg[5] == 0x00 && // Address
msg[6] == 0x7F && // Address LSB
((msg[7] == 0x00 && // Data (MODE-1)
msg[8] == 0x01) || // Checksum (MODE-1)
(msg[7] == 0x01 && // Data (MODE-2)
msg[8] == 0x00))) // Checksum (MODE-2)
{
// SC-88 System Mode Set
// 41 <dev> 42 12 00 00 7F 00 01 F7 (MODE-1)
// 41 <dev> 42 12 00 00 7F 01 00 F7 (MODE-2)
return true;
}
else if (length == 10 &&
msg[4] == 0x40 && // Address MSB
msg[5] == 0x00 && // Address
msg[6] == 0x7F && // Address LSB
msg[7] == 0x00 && // Data (GS Reset)
msg[8] == 0x41) // Checksum
{
// GS Reset
// 41 <dev> 42 12 40 00 7F 00 41 F7
return true;
}
break;
}
break;
}
break;
case 0x43: // Yamaha
switch (msg[2])
{
case 0x2B: // TG300
if (length == 9 &&
msg[3] == 0x00 && // Start Address b20 - b14
msg[4] == 0x00 && // Start Address b13 - b7
msg[5] == 0x7F && // Start Address b6 - b0
msg[6] == 0x00 && // Data
msg[7] == 0x01) // Checksum
{
// TG300 All Parameter Reset
// 43 <dev> 2B 00 00 7F 00 01 F7
return true;
}
break;
case 0x4C: // XG
if (length == 8 &&
msg[3] == 0x00 && // Address High
msg[4] == 0x00 && // Address Mid
(msg[5] == 0x7E || // Address Low (System On)
msg[5] == 0x7F) && // Address Low (All Parameter Reset)
msg[6] == 0x00) // Data
{
// XG System On, XG All Parameter Reset
// 43 <dev> 4C 00 00 7E 00 F7
// 43 <dev> 4C 00 00 7F 00 F7
return true;
}
break;
}
break;
case 0x7E: // Universal Non-Real Time
switch (msg[2])
{
case 0x09: // General Midi
if (length == 5 &&
(msg[3] == 0x01 || // GM System On
msg[3] == 0x02 || // GM System Off
msg[3] == 0x03)) // GM2 System On
{
// GM System On/Off, GM2 System On
// 7E <dev> 09 01 F7
// 7E <dev> 09 02 F7
// 7E <dev> 09 03 F7
return true;
}
break;
}
break;
}
return false;
}
static void SendSysExMsg(int time, const byte *data, int length)
{
native_event_t native_event;
boolean is_sysex_reset;
const byte event_type = MIDI_EVENT_SYSEX;
is_sysex_reset = IsSysExReset(data, length);
if (is_sysex_reset && MidiDevice == ms_gs_synth)
{
// Ignore SysEx reset from MIDI file for MS GS Wavetable Synth.
SendNOPMsg(time);
return;
}
// Send the SysEx message.
native_event.dwDeltaTime = time;
native_event.dwStreamID = 0;
native_event.dwEvent = MAKE_EVT(length + sizeof(byte), 0, 0, MEVT_LONGMSG);
WriteBuffer((byte *)&native_event, sizeof(native_event_t));
WriteBuffer(&event_type, sizeof(byte));
WriteBuffer(data, length);
WriteBufferPad();
if (is_sysex_reset)
{
// SysEx reset also resets volume. Take the default channel volumes
// and scale them by the user's volume slider.
ResetVolume();
// Disable instrument fallback and give priority to MIDI file. Fallback
// assumes GS (SC-55 level) and the MIDI file could be GM, GM2, XG, or
// GS (SC-88 or higher). Preserve the composer's intent.
MIDI_ResetFallback();
use_fallback = false;
// Use default device for EMIDI.
emidi_device = EMIDI_DEVICE_GENERAL_MIDI;
}
}
static void SendProgramMsg(int time, int channel, int program,
midi_fallback_t *fallback)
{
switch ((int)fallback->type)
{
case FALLBACK_BANK_MSB:
SendShortMsg(time, MIDI_EVENT_CONTROLLER, channel,
MIDI_CONTROLLER_BANK_SELECT_MSB, fallback->value);
SendShortMsg(0, MIDI_EVENT_PROGRAM_CHANGE, channel, program, 0);
break;
case FALLBACK_DRUMS:
SendShortMsg(time, MIDI_EVENT_PROGRAM_CHANGE, channel,
fallback->value, 0);
break;
default:
SendShortMsg(time, MIDI_EVENT_PROGRAM_CHANGE, channel, program, 0);
break;
}
}
static void SetLoopPoint(void)
{
unsigned int i;
for (i = 0; i < song.num_tracks; ++i)
{
MIDI_SetLoopPoint(song.tracks[i].iter);
song.tracks[i].saved_end_of_track = song.tracks[i].end_of_track;
song.tracks[i].saved_elapsed_time = song.tracks[i].elapsed_time;
}
song.saved_elapsed_time = song.elapsed_time;
}
static void CheckFFLoop(midi_event_t *event)
{
if (event->data.meta.length == sizeof(ff_loopStart) &&
!memcmp(event->data.meta.data, ff_loopStart, sizeof(ff_loopStart)))
{
SetLoopPoint();
song.ff_loop = true;
}
else if (song.ff_loop && event->data.meta.length == sizeof(ff_loopEnd) &&
!memcmp(event->data.meta.data, ff_loopEnd, sizeof(ff_loopEnd)))
{
song.ff_restart = true;
}
}
static boolean AddToBuffer(unsigned int delta_time, midi_event_t *event,
win_midi_track_t *track)
{
unsigned int i;
unsigned int flag;
int count;
midi_fallback_t fallback = {FALLBACK_NONE, 0};
if (use_fallback)
{
MIDI_CheckFallback(event, &fallback);
}
switch ((int)event->event_type)
{
case MIDI_EVENT_SYSEX:
SendSysExMsg(delta_time, event->data.sysex.data,
event->data.sysex.length);
return false;
case MIDI_EVENT_META:
switch (event->data.meta.type)
{
case MIDI_META_END_OF_TRACK:
track->end_of_track = true;
SendNOPMsg(delta_time);
break;
case MIDI_META_SET_TEMPO:
UpdateTempo(delta_time, event);
break;
case MIDI_META_MARKER:
CheckFFLoop(event);
SendNOPMsg(delta_time);
break;
default:
SendNOPMsg(delta_time);
break;
}
return true;
}
if (track->emidi_designated && (emidi_device & ~track->emidi_device_flags))
{
// Send NOP if this device has been excluded from this track.
SendNOPMsg(delta_time);
return true;
}
switch ((int)event->event_type)
{
case MIDI_EVENT_CONTROLLER:
switch (event->data.channel.param1)
{
case MIDI_CONTROLLER_VOLUME_MSB:
if (track->emidi_volume)
{
SendNOPMsg(delta_time);
}
else
{
SendVolumeMsg(delta_time, event->data.channel.channel,
event->data.channel.param2);
}
break;
case MIDI_CONTROLLER_VOLUME_LSB:
SendNOPMsg(delta_time);
break;
case MIDI_CONTROLLER_BANK_SELECT_LSB:
if (fallback.type == FALLBACK_BANK_LSB)
{
SendShortMsg(delta_time, MIDI_EVENT_CONTROLLER,
event->data.channel.channel,
MIDI_CONTROLLER_BANK_SELECT_LSB,
fallback.value);
}
else
{
SendShortMsg(delta_time, MIDI_EVENT_CONTROLLER,
event->data.channel.channel,
MIDI_CONTROLLER_BANK_SELECT_LSB,
event->data.channel.param2);
}
break;
case EMIDI_CONTROLLER_TRACK_DESIGNATION:
if (track->elapsed_time < timediv)
{
flag = event->data.channel.param2;
if (flag == EMIDI_DEVICE_ALL)
{
track->emidi_device_flags = UINT_MAX;
track->emidi_designated = true;
}
else if (flag <= EMIDI_DEVICE_ULTRASOUND)
{
track->emidi_device_flags |= 1 << flag;
track->emidi_designated = true;
}
}
SendNOPMsg(delta_time);
break;
case EMIDI_CONTROLLER_TRACK_EXCLUSION:
if (song.rpg_loop)
{
SetLoopPoint();
}
else if (track->elapsed_time < timediv)
{
flag = event->data.channel.param2;
if (!track->emidi_designated)
{
track->emidi_device_flags = UINT_MAX;
track->emidi_designated = true;
}
if (flag <= EMIDI_DEVICE_ULTRASOUND)
{
track->emidi_device_flags &= ~(1 << flag);
}
}
SendNOPMsg(delta_time);
break;
case EMIDI_CONTROLLER_PROGRAM_CHANGE:
if (track->emidi_program || track->elapsed_time < timediv)
{
track->emidi_program = true;
SendProgramMsg(delta_time, event->data.channel.channel,
event->data.channel.param2, &fallback);
}
else
{
SendNOPMsg(delta_time);
}
break;
case EMIDI_CONTROLLER_VOLUME:
if (track->emidi_volume || track->elapsed_time < timediv)
{
track->emidi_volume = true;
SendVolumeMsg(delta_time, event->data.channel.channel,
event->data.channel.param2);
}
else
{
SendNOPMsg(delta_time);
}
break;
case EMIDI_CONTROLLER_LOOP_BEGIN:
count = event->data.channel.param2;
count = (count == 0) ? (-1) : count;
track->emidi_loop_count = count;
MIDI_SetLoopPoint(track->iter);
SendNOPMsg(delta_time);
break;
case EMIDI_CONTROLLER_LOOP_END:
if (event->data.channel.param2 == EMIDI_LOOP_FLAG)
{
if (track->emidi_loop_count != 0)
{
MIDI_RestartAtLoopPoint(track->iter);
}
if (track->emidi_loop_count > 0)
{
track->emidi_loop_count--;
}
}
SendNOPMsg(delta_time);
break;
case EMIDI_CONTROLLER_GLOBAL_LOOP_BEGIN:
count = event->data.channel.param2;
count = (count == 0) ? (-1) : count;
for (i = 0; i < song.num_tracks; ++i)
{
song.tracks[i].emidi_loop_count = count;
MIDI_SetLoopPoint(song.tracks[i].iter);
}
SendNOPMsg(delta_time);
break;
case EMIDI_CONTROLLER_GLOBAL_LOOP_END:
if (event->data.channel.param2 == EMIDI_LOOP_FLAG)
{
for (i = 0; i < song.num_tracks; ++i)
{
if (song.tracks[i].emidi_loop_count != 0)
{
MIDI_RestartAtLoopPoint(song.tracks[i].iter);
}
if (song.tracks[i].emidi_loop_count > 0)
{
song.tracks[i].emidi_loop_count--;
}
}
}
SendNOPMsg(delta_time);
break;
default:
SendShortMsg(delta_time, MIDI_EVENT_CONTROLLER,
event->data.channel.channel,
event->data.channel.param1,
event->data.channel.param2);
break;
}
break;
case MIDI_EVENT_NOTE_OFF:
case MIDI_EVENT_NOTE_ON:
case MIDI_EVENT_AFTERTOUCH:
case MIDI_EVENT_PITCH_BEND:
SendShortMsg(delta_time, event->event_type,
event->data.channel.channel,
event->data.channel.param1,
event->data.channel.param2);
break;
case MIDI_EVENT_PROGRAM_CHANGE:
if (track->emidi_program)
{
SendNOPMsg(delta_time);
}
else
{
SendProgramMsg(delta_time, event->data.channel.channel,
event->data.channel.param1, &fallback);
}
break;
case MIDI_EVENT_CHAN_AFTERTOUCH:
SendShortMsg(delta_time, MIDI_EVENT_CHAN_AFTERTOUCH,
event->data.channel.channel,
event->data.channel.param1, 0);
break;
default:
SendNOPMsg(delta_time);
break;
}
return true;
}
static void RestartLoop(void)
{
unsigned int i;
for (i = 0; i < song.num_tracks; ++i)
{
MIDI_RestartAtLoopPoint(song.tracks[i].iter);
song.tracks[i].end_of_track = song.tracks[i].saved_end_of_track;
song.tracks[i].elapsed_time = song.tracks[i].saved_elapsed_time;
}
song.elapsed_time = song.saved_elapsed_time;
}
static void RestartTracks(void)
{
unsigned int i;
for (i = 0; i < song.num_tracks; ++i)
{
MIDI_RestartIterator(song.tracks[i].iter);
song.tracks[i].elapsed_time = 0;
song.tracks[i].end_of_track = false;
song.tracks[i].emidi_device_flags = 0;
song.tracks[i].emidi_designated = false;
song.tracks[i].emidi_program = false;
song.tracks[i].emidi_volume = false;
song.tracks[i].emidi_loop_count = 0;
}
song.elapsed_time = 0;
}
static boolean IsRPGLoop(void)
{
unsigned int i;
unsigned int num_rpg_events = 0;
unsigned int num_emidi_events = 0;
midi_event_t *event = NULL;
for (i = 0; i < song.num_tracks; ++i)
{
while (MIDI_GetNextEvent(song.tracks[i].iter, &event))
{
if (event->event_type == MIDI_EVENT_CONTROLLER)
{
switch (event->data.channel.param1)
{
case EMIDI_CONTROLLER_TRACK_EXCLUSION:
num_rpg_events++;
break;
case EMIDI_CONTROLLER_TRACK_DESIGNATION:
case EMIDI_CONTROLLER_PROGRAM_CHANGE:
case EMIDI_CONTROLLER_VOLUME:
case EMIDI_CONTROLLER_LOOP_BEGIN:
case EMIDI_CONTROLLER_LOOP_END:
case EMIDI_CONTROLLER_GLOBAL_LOOP_BEGIN:
case EMIDI_CONTROLLER_GLOBAL_LOOP_END:
num_emidi_events++;
break;
}
}
}
MIDI_RestartIterator(song.tracks[i].iter);
}
return (num_rpg_events == 1 && num_emidi_events == 0);
}
static void FillBuffer(void)
{
unsigned int i;
int num_events;
buffer.position = 0;
if (initial_playback)
{
ResetDevice();
StreamOut();
song.rpg_loop = IsRPGLoop();
initial_playback = false;
return;
}
if (update_volume)
{
update_volume = false;
UpdateVolume();
StreamOut();
return;
}
for (num_events = 0; num_events < STREAM_MAX_EVENTS; )
{
midi_event_t *event = NULL;
win_midi_track_t *track = NULL;
unsigned int min_time = UINT_MAX;
unsigned int delta_time;
// Find next event across all tracks.
for (i = 0; i < song.num_tracks; ++i)
{
if (!song.tracks[i].end_of_track)
{
unsigned int time = song.tracks[i].elapsed_time +
MIDI_GetDeltaTime(song.tracks[i].iter);
if (time < min_time)
{
min_time = time;
track = &song.tracks[i];
}
}
}
// No more events. Restart or stop song.
if (track == NULL)
{
if (song.elapsed_time)
{
if (song.ff_restart || song.rpg_loop)
{
song.ff_restart = false;
RestartLoop();
continue;
}
else if (song.looping)
{
RestartTracks();
continue;
}
}
break;
}
track->elapsed_time = min_time;
delta_time = min_time - song.elapsed_time;
song.elapsed_time = min_time;
if (!MIDI_GetNextEvent(track->iter, &event))
{
track->end_of_track = true;
continue;
}
// Restart FF loop after sending all events that share same timediv.
if (song.ff_restart && MIDI_GetDeltaTime(track->iter) > 0)
{
song.ff_restart = false;
RestartLoop();
continue;
}
if (!AddToBuffer(delta_time, event, track))
{
StreamOut();
return;
}
num_events++;
}
if (num_events)
{
StreamOut();
}
}
// The Windows API documentation states: "Applications should not call any
// multimedia functions from inside the callback function, as doing so can
// cause a deadlock." We use thread to avoid possible deadlocks.
static DWORD WINAPI PlayerProc(void)
{
HANDLE events[2] = { hBufferReturnEvent, hExitEvent };
while (1)
{
switch (WaitForMultipleObjects(2, events, FALSE, INFINITE))
{
case WAIT_OBJECT_0:
FillBuffer();
break;
case WAIT_OBJECT_0 + 1:
return 0;
}
}
return 0;
}
static boolean I_WIN_InitMusic(void)
{
int all_devices;
int i;
MIDIOUTCAPS mcaps;
MMRESULT mmr;
// find the midi device that matches the saved one
if (winmm_midi_device != NULL)
{
all_devices = midiOutGetNumDevs() + 1; // include MIDI_MAPPER
for (i = 0; i < all_devices; ++i)
{
// start from device id -1 (MIDI_MAPPER)
mmr = midiOutGetDevCaps(i - 1, &mcaps, sizeof(mcaps));
if (mmr == MMSYSERR_NOERROR)
{
if (strstr(winmm_midi_device, mcaps.szPname))
{
MidiDevice = i - 1;
break;
}
}
if (i == all_devices - 1)
{
// give up and use MIDI_MAPPER
free(winmm_midi_device);
winmm_midi_device = NULL;
}
}
}
if (winmm_midi_device == NULL)
{
MidiDevice = MIDI_MAPPER;
mmr = midiOutGetDevCaps(MIDI_MAPPER, &mcaps, sizeof(mcaps));
if (mmr == MMSYSERR_NOERROR)
{
winmm_midi_device = M_StringDuplicate(mcaps.szPname);
}
}
// Is this device MS GS Synth?
{
const char pname[] = "Microsoft GS Wavetable";
if (!strncasecmp(pname, mcaps.szPname, sizeof(pname) - 1))
{
ms_gs_synth = MidiDevice;
}
}
mmr = midiStreamOpen(&hMidiStream, &MidiDevice, (DWORD)1,
(DWORD_PTR)MidiStreamProc, (DWORD_PTR)NULL,
CALLBACK_FUNCTION);
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiStreamOpen", mmr);
return false;
}
AllocateBuffer(BUFFER_INITIAL_SIZE);
hBufferReturnEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
hExitEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
MIDI_InitFallback();
return true;
}
static void I_WIN_SetMusicVolume(int volume)
{
static int last_volume = -1;
if (last_volume == volume)
{
// Ignore holding key down in volume menu.
return;
}
last_volume = volume;
volume_factor = sqrtf((float)volume / 120);
update_volume = song.registered;
}
static void I_WIN_StopSong(void)
{
MMRESULT mmr;
if (!hPlayerThread)
{
return;
}
SetEvent(hExitEvent);
WaitForSingleObject(hPlayerThread, INFINITE);
CloseHandle(hPlayerThread);
hPlayerThread = NULL;
mmr = midiStreamStop(hMidiStream);
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiStreamStop", mmr);
}
}
static void I_WIN_PlaySong(void *handle, boolean looping)
{
MMRESULT mmr;
song.looping = looping;
hPlayerThread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)PlayerProc,
0, 0, 0);
SetThreadPriority(hPlayerThread, THREAD_PRIORITY_TIME_CRITICAL);
initial_playback = true;
SetEvent(hBufferReturnEvent);
mmr = midiStreamRestart(hMidiStream);
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiStreamRestart", mmr);
}
}
static void I_WIN_PauseSong(void)
{
MMRESULT mmr;
mmr = midiStreamPause(hMidiStream);
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiStreamPause", mmr);
}
}
static void I_WIN_ResumeSong(void)
{
MMRESULT mmr;
mmr = midiStreamRestart(hMidiStream);
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiStreamRestart", mmr);
}
}
// Determine whether memory block is a .mid file
static boolean IsMid(byte *mem, int len)
{
return len > 4 && !memcmp(mem, "MThd", 4);
}
static boolean ConvertMus(byte *musdata, int len, const char *filename)
{
MEMFILE *instream;
MEMFILE *outstream;
void *outbuf;
size_t outbuf_len;
int result;
instream = mem_fopen_read(musdata, len);
outstream = mem_fopen_write();
result = mus2mid(instream, outstream);
if (result == 0)
{
mem_get_buf(outstream, &outbuf, &outbuf_len);
M_WriteFile(filename, outbuf, outbuf_len);
}
mem_fclose(instream);
mem_fclose(outstream);
return result;
}
static void *I_WIN_RegisterSong(void *data, int len)
{
unsigned int i;
char *filename;
midi_file_t *file;
MIDIPROPTIMEDIV prop_timediv;
MIDIPROPTEMPO prop_tempo;
MMRESULT mmr;
// MUS files begin with "MUS"
// Reject anything which doesnt have this signature
filename = M_TempFile("doom.mid");
if (IsMid(data, len))
{
M_WriteFile(filename, data, len);
}
else
{
// Assume a MUS file and try to convert
ConvertMus(data, len, filename);
}
file = MIDI_LoadFile(filename);
M_remove(filename);
free(filename);
if (file == NULL)
{
fprintf(stderr, "I_WIN_RegisterSong: Failed to load MID.\n");
return NULL;
}
prop_timediv.cbStruct = sizeof(MIDIPROPTIMEDIV);
prop_timediv.dwTimeDiv = MIDI_GetFileTimeDivision(file);
mmr = midiStreamProperty(hMidiStream, (LPBYTE)&prop_timediv,
MIDIPROP_SET | MIDIPROP_TIMEDIV);
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiStreamProperty", mmr);
return NULL;
}
timediv = prop_timediv.dwTimeDiv;
// Set initial tempo.
prop_tempo.cbStruct = sizeof(MIDIPROPTIMEDIV);
prop_tempo.dwTempo = 500000; // 120 BPM
mmr = midiStreamProperty(hMidiStream, (LPBYTE)&prop_tempo,
MIDIPROP_SET | MIDIPROP_TEMPO);
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiStreamProperty", mmr);
return NULL;
}
tempo = prop_tempo.dwTempo;
song.num_tracks = MIDI_NumTracks(file);
song.tracks = calloc(song.num_tracks, sizeof(win_midi_track_t));
for (i = 0; i < song.num_tracks; ++i)
{
song.tracks[i].iter = MIDI_IterateTrack(file, i);
}
song.registered = true;
ResetEvent(hBufferReturnEvent);
ResetEvent(hExitEvent);
return file;
}
static void I_WIN_UnRegisterSong(void *handle)
{
if (song.tracks)
{
int i;
for (i = 0; i < song.num_tracks; ++i)
{
MIDI_FreeIterator(song.tracks[i].iter);
song.tracks[i].iter = NULL;
}
free(song.tracks);
song.tracks = NULL;
}
if (handle)
{
MIDI_FreeFile(handle);
}
song.elapsed_time = 0;
song.saved_elapsed_time = 0;
song.num_tracks = 0;
song.registered = false;
song.looping = false;
song.ff_loop = false;
song.ff_restart = false;
song.rpg_loop = false;
}
static void I_WIN_ShutdownMusic(void)
{
MMRESULT mmr;
if (!hMidiStream)
{
return;
}
I_WIN_StopSong();
I_WIN_UnRegisterSong(NULL);
// Reset device at shutdown.
buffer.position = 0;
ResetDevice();
StreamOut();
mmr = midiStreamRestart(hMidiStream);
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiStreamRestart", mmr);
}
WaitForSingleObject(hBufferReturnEvent, INFINITE);
mmr = midiStreamStop(hMidiStream);
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiStreamStop", mmr);
}
if (buffer.data)
{
// Windows doesn't always immediately clear the MHDR_INQUEUE flag, even
// after midiStreamStop() is called. There doesn't seem to be any side
// effect to just forcing the flag off.
MidiStreamHdr.dwFlags &= ~MHDR_INQUEUE;
mmr = midiOutUnprepareHeader((HMIDIOUT)hMidiStream, &MidiStreamHdr,
sizeof(MIDIHDR));
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiOutUnprepareHeader", mmr);
}
free(buffer.data);
buffer.data = NULL;
buffer.size = 0;
buffer.position = 0;
}
mmr = midiStreamClose(hMidiStream);
if (mmr != MMSYSERR_NOERROR)
{
MidiError("midiStreamClose", mmr);
}
hMidiStream = NULL;
CloseHandle(hBufferReturnEvent);
CloseHandle(hExitEvent);
}
static boolean I_WIN_MusicIsPlaying(void)
{
return (song.num_tracks > 0);
}
static snddevice_t music_win_devices[] =
{
SNDDEVICE_PAS,
SNDDEVICE_WAVEBLASTER,
SNDDEVICE_SOUNDCANVAS,
SNDDEVICE_GENMIDI,
SNDDEVICE_AWE32,
};
music_module_t music_win_module =
{
music_win_devices,
arrlen(music_win_devices),
I_WIN_InitMusic,
I_WIN_ShutdownMusic,
I_WIN_SetMusicVolume,
I_WIN_PauseSong,
I_WIN_ResumeSong,
I_WIN_RegisterSong,
I_WIN_UnRegisterSong,
I_WIN_PlaySong,
I_WIN_StopSong,
I_WIN_MusicIsPlaying,
NULL, // Poll
};
#endif