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Move MIDI parsing up from ALSA driver to platform independent driver. 

Aims for more consistent MIDI support across Windows, MacOS, Linux and
to provide a base for adding MIDI drivers for other platforms.
Reworks the MIDIDriverALSAMidi MIDI parsing implementation as a platform
independent version in MIDIDriver::Parser.
Uses MIDIDriver::Parser to provide running status support in MacOS
MIDIDriverCoreMidi.
Collects connected input names at open, ensuring devices indices reported
in events match names in array returned from get_connected_inputs.

Fixes #77035.
Fixes #79811.

With code review changes by: A Thousand Ships (she/her)
<96648715+AThousandShips@users.noreply.github.com>
This commit is contained in:
Ibrahn Sahir 2024-04-10 10:50:28 +01:00
parent 6b281c0c07
commit 607c5ec49f
8 changed files with 335 additions and 319 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

209
core/os/midi_driver.cpp
View File

@ -38,88 +38,167 @@ MIDIDriver *MIDIDriver::get_singleton() {
return singleton;
}
void MIDIDriver::set_singleton() {
MIDIDriver::MIDIDriver() {
singleton = this;
}
void MIDIDriver::receive_input_packet(int device_index, uint64_t timestamp, uint8_t *data, uint32_t length) {
MIDIDriver::MessageCategory MIDIDriver::Parser::category(uint8_t p_midi_fragment) {
if (p_midi_fragment >= 0xf8) {
return MessageCategory::RealTime;
} else if (p_midi_fragment >= 0xf0) {
// System Exclusive begin/end are specified as System Common Category
// messages, but we separate them here and give them their own categories
// as their behavior is significantly different.
if (p_midi_fragment == 0xf0) {
return MessageCategory::SysExBegin;
} else if (p_midi_fragment == 0xf7) {
return MessageCategory::SysExEnd;
}
return MessageCategory::SystemCommon;
} else if (p_midi_fragment >= 0x80) {
return MessageCategory::Voice;
}
return MessageCategory::Data;
}
MIDIMessage MIDIDriver::Parser::status_to_msg_enum(uint8_t p_status_byte) {
if (p_status_byte & 0x80) {
if (p_status_byte < 0xf0) {
return MIDIMessage(p_status_byte >> 4);
} else {
return MIDIMessage(p_status_byte);
}
}
return MIDIMessage::NONE;
}
size_t MIDIDriver::Parser::expected_data(uint8_t p_status_byte) {
return expected_data(status_to_msg_enum(p_status_byte));
}
size_t MIDIDriver::Parser::expected_data(MIDIMessage p_msg_type) {
switch (p_msg_type) {
case MIDIMessage::NOTE_OFF:
case MIDIMessage::NOTE_ON:
case MIDIMessage::AFTERTOUCH:
case MIDIMessage::CONTROL_CHANGE:
case MIDIMessage::PITCH_BEND:
case MIDIMessage::SONG_POSITION_POINTER:
return 2;
case MIDIMessage::PROGRAM_CHANGE:
case MIDIMessage::CHANNEL_PRESSURE:
case MIDIMessage::QUARTER_FRAME:
case MIDIMessage::SONG_SELECT:
return 1;
default:
return 0;
}
}
uint8_t MIDIDriver::Parser::channel(uint8_t p_status_byte) {
if (category(p_status_byte) == MessageCategory::Voice) {
return p_status_byte & 0x0f;
}
return 0;
}
void MIDIDriver::send_event(int p_device_index, uint8_t p_status,
const uint8_t *p_data, size_t p_data_len) {
const MIDIMessage msg = Parser::status_to_msg_enum(p_status);
ERR_FAIL_COND(p_data_len < Parser::expected_data(msg));
Ref<InputEventMIDI> event;
event.instantiate();
event->set_device(device_index);
uint32_t param_position = 1;
if (length >= 1) {
if (data[0] >= 0xF0) {
// channel does not apply to system common messages
event->set_channel(0);
event->set_message(MIDIMessage(data[0]));
last_received_message = data[0];
} else if ((data[0] & 0x80) == 0x00) {
// running status
event->set_channel(last_received_message & 0xF);
event->set_message(MIDIMessage(last_received_message >> 4));
param_position = 0;
} else {
event->set_channel(data[0] & 0xF);
event->set_message(MIDIMessage(data[0] >> 4));
param_position = 1;
last_received_message = data[0];
}
}
switch (event->get_message()) {
case MIDIMessage::AFTERTOUCH:
if (length >= 2 + param_position) {
event->set_pitch(data[param_position]);
event->set_pressure(data[param_position + 1]);
}
break;
case MIDIMessage::CONTROL_CHANGE:
if (length >= 2 + param_position) {
event->set_controller_number(data[param_position]);
event->set_controller_value(data[param_position + 1]);
}
break;
case MIDIMessage::NOTE_ON:
event->set_device(p_device_index);
event->set_channel(Parser::channel(p_status));
event->set_message(msg);
switch (msg) {
case MIDIMessage::NOTE_OFF:
if (length >= 2 + param_position) {
event->set_pitch(data[param_position]);
event->set_velocity(data[param_position + 1]);
}
case MIDIMessage::NOTE_ON:
event->set_pitch(p_data[0]);
event->set_velocity(p_data[1]);
break;
case MIDIMessage::PITCH_BEND:
if (length >= 2 + param_position) {
event->set_pitch((data[param_position + 1] << 7) | data[param_position]);
}
case MIDIMessage::AFTERTOUCH:
event->set_pitch(p_data[0]);
event->set_pressure(p_data[1]);
break;
case MIDIMessage::CONTROL_CHANGE:
event->set_controller_number(p_data[0]);
event->set_controller_value(p_data[1]);
break;
case MIDIMessage::PROGRAM_CHANGE:
if (length >= 1 + param_position) {
event->set_instrument(data[param_position]);
}
event->set_instrument(p_data[0]);
break;
case MIDIMessage::CHANNEL_PRESSURE:
if (length >= 1 + param_position) {
event->set_pressure(data[param_position]);
}
event->set_pressure(p_data[0]);
break;
case MIDIMessage::PITCH_BEND:
event->set_pitch((p_data[1] << 7) | p_data[0]);
break;
// QUARTER_FRAME, SONG_POSITION_POINTER, and SONG_SELECT not yet implemented.
default:
break;
}
Input *id = Input::get_singleton();
id->parse_input_event(event);
Input::get_singleton()->parse_input_event(event);
}
PackedStringArray MIDIDriver::get_connected_inputs() {
PackedStringArray list;
return list;
void MIDIDriver::Parser::parse_fragment(uint8_t p_fragment) {
switch (category(p_fragment)) {
case MessageCategory::RealTime:
// Real-Time messages are single byte messages that can
// occur at any point and do not interrupt other messages.
// We pass them straight through.
MIDIDriver::send_event(device_index, p_fragment);
break;
case MessageCategory::SysExBegin:
status_byte = p_fragment;
skipping_sys_ex = true;
break;
case MessageCategory::SysExEnd:
status_byte = 0;
skipping_sys_ex = false;
break;
case MessageCategory::Voice:
case MessageCategory::SystemCommon:
skipping_sys_ex = false; // If we were in SysEx, assume it was aborted.
received_data_len = 0;
status_byte = 0;
ERR_FAIL_COND(expected_data(p_fragment) > DATA_BUFFER_SIZE);
if (expected_data(p_fragment) == 0) {
// No data bytes needed, post it now.
MIDIDriver::send_event(device_index, p_fragment);
} else {
status_byte = p_fragment;
}
break;
case MessageCategory::Data:
// We don't currently process SysEx messages, so ignore their data.
if (!skipping_sys_ex) {
const size_t expected = expected_data(status_byte);
if (received_data_len < expected) {
data_buffer[received_data_len] = p_fragment;
received_data_len++;
if (received_data_len == expected) {
MIDIDriver::send_event(device_index, status_byte,
data_buffer, expected);
received_data_len = 0;
// Voice messages can use 'running status', sending further
// messages without resending their status byte.
// For other messages types we clear the cached status byte.
if (category(status_byte) != MessageCategory::Voice) {
status_byte = 0;
}
}
}
}
break;
}
}
MIDIDriver::MIDIDriver() {
set_singleton();
PackedStringArray MIDIDriver::get_connected_inputs() const {
return connected_input_names;
}

68
core/os/midi_driver.h
View File

@ -42,19 +42,73 @@ class MIDIDriver {
static MIDIDriver *singleton;
static uint8_t last_received_message;
protected:
// Categories of message for parser logic.
enum class MessageCategory {
Data,
Voice,
SysExBegin,
SystemCommon, // excluding System Exclusive Begin/End
SysExEnd,
RealTime,
};
// Convert midi data to InputEventMIDI and send it to Input.
// p_data_len is the length of the buffer passed at p_data, this must be
// at least equal to the data required by the passed message type, but
// may be larger. Only the required data will be read.
static void send_event(int p_device_index, uint8_t p_status,
const uint8_t *p_data = nullptr, size_t p_data_len = 0);
class Parser {
public:
Parser() = default;
Parser(int p_device_index) :
device_index{ p_device_index } {}
virtual ~Parser() = default;
// Push a byte of MIDI stream. Any completed messages will be
// forwarded to MIDIDriver::send_event.
void parse_fragment(uint8_t p_fragment);
static MessageCategory category(uint8_t p_midi_fragment);
// If the byte is a Voice Message status byte return the contained
// channel number, otherwise zero.
static uint8_t channel(uint8_t p_status_byte);
// If the byte is a status byte for a message with a fixed number of
// additional data bytes, return the number expected, otherwise zero.
static size_t expected_data(uint8_t p_status_byte);
static size_t expected_data(MIDIMessage p_msg_type);
// If the fragment is a status byte return the message type
// represented, otherwise MIDIMessage::NONE.
static MIDIMessage status_to_msg_enum(uint8_t p_status_byte);
private:
int device_index = 0;
static constexpr size_t DATA_BUFFER_SIZE = 2;
uint8_t status_byte = 0;
uint8_t data_buffer[DATA_BUFFER_SIZE] = { 0 };
size_t received_data_len = 0;
bool skipping_sys_ex = false;
};
PackedStringArray connected_input_names;
public:
static MIDIDriver *get_singleton();
void set_singleton();
MIDIDriver();
virtual ~MIDIDriver() = default;
virtual Error open() = 0;
virtual void close() = 0;
virtual PackedStringArray get_connected_inputs();
static void receive_input_packet(int device_index, uint64_t timestamp, uint8_t *data, uint32_t length);
MIDIDriver();
virtual ~MIDIDriver() {}
PackedStringArray get_connected_inputs() const;
};
#endif // MIDI_DRIVER_H

177
drivers/alsamidi/midi_driver_alsamidi.cpp
View File

@ -37,137 +37,36 @@
#include <errno.h>
MIDIDriverALSAMidi::MessageCategory MIDIDriverALSAMidi::msg_category(uint8_t msg_part) {
if (msg_part >= 0xf8) {
return MessageCategory::RealTime;
} else if (msg_part >= 0xf0) {
// System Exclusive begin/end are specified as System Common Category messages,
// but we separate them here and give them their own categories as their
// behavior is significantly different.
if (msg_part == 0xf0) {
return MessageCategory::SysExBegin;
} else if (msg_part == 0xf7) {
return MessageCategory::SysExEnd;
}
return MessageCategory::SystemCommon;
} else if (msg_part >= 0x80) {
return MessageCategory::Voice;
}
return MessageCategory::Data;
}
MIDIDriverALSAMidi::InputConnection::InputConnection(int p_device_index,
snd_rawmidi_t *p_rawmidi) :
parser(p_device_index), rawmidi_ptr(p_rawmidi) {}
size_t MIDIDriverALSAMidi::msg_expected_data(uint8_t status_byte) {
if (msg_category(status_byte) == MessageCategory::Voice) {
// Voice messages have a channel number in the status byte, mask it out.
status_byte &= 0xf0;
}
switch (status_byte) {
case 0x80: // Note Off
case 0x90: // Note On
case 0xA0: // Polyphonic Key Pressure (Aftertouch)
case 0xB0: // Control Change (CC)
case 0xE0: // Pitch Bend Change
case 0xF2: // Song Position Pointer
return 2;
case 0xC0: // Program Change
case 0xD0: // Channel Pressure (Aftertouch)
case 0xF1: // MIDI Time Code Quarter Frame
case 0xF3: // Song Select
return 1;
}
return 0;
}
void MIDIDriverALSAMidi::InputConnection::parse_byte(uint8_t byte, MIDIDriverALSAMidi &driver,
uint64_t timestamp, int device_index) {
switch (msg_category(byte)) {
case MessageCategory::RealTime:
// Real-Time messages are single byte messages that can
// occur at any point.
// We pass them straight through.
driver.receive_input_packet(device_index, timestamp, &byte, 1);
break;
case MessageCategory::Data:
// We don't currently forward System Exclusive messages so skip their data.
// Collect any expected data for other message types.
if (!skipping_sys_ex && expected_data > received_data) {
buffer[received_data + 1] = byte;
received_data++;
// Forward a complete message and reset relevant state.
if (received_data == expected_data) {
driver.receive_input_packet(device_index, timestamp, buffer, received_data + 1);
received_data = 0;
if (msg_category(buffer[0]) != MessageCategory::Voice) {
// Voice Category messages can be sent with "running status".
// This means they don't resend the status byte until it changes.
// For other categories, we reset expected data, to require a new status byte.
expected_data = 0;
}
}
}
break;
case MessageCategory::SysExBegin:
buffer[0] = byte;
skipping_sys_ex = true;
break;
case MessageCategory::SysExEnd:
expected_data = 0;
skipping_sys_ex = false;
break;
case MessageCategory::Voice:
case MessageCategory::SystemCommon:
buffer[0] = byte;
received_data = 0;
expected_data = msg_expected_data(byte);
skipping_sys_ex = false;
if (expected_data == 0) {
driver.receive_input_packet(device_index, timestamp, &byte, 1);
}
break;
}
}
int MIDIDriverALSAMidi::InputConnection::read_in(MIDIDriverALSAMidi &driver, uint64_t timestamp, int device_index) {
int ret;
void MIDIDriverALSAMidi::InputConnection::read() {
int read_count;
do {
uint8_t byte = 0;
ret = snd_rawmidi_read(rawmidi_ptr, &byte, 1);
uint8_t buffer[32];
read_count = snd_rawmidi_read(rawmidi_ptr, buffer, sizeof(buffer));
if (ret < 0) {
if (ret != -EAGAIN) {
ERR_PRINT("snd_rawmidi_read error: " + String(snd_strerror(ret)));
if (read_count < 0) {
if (read_count != -EAGAIN) {
ERR_PRINT("snd_rawmidi_read error: " + String(snd_strerror(read_count)));
}
} else {
parse_byte(byte, driver, timestamp, device_index);
for (int i = 0; i < read_count; i++) {
parser.parse_fragment(buffer[i]);
}
} while (ret > 0);
return ret;
}
} while (read_count > 0);
}
void MIDIDriverALSAMidi::thread_func(void *p_udata) {
MIDIDriverALSAMidi *md = static_cast<MIDIDriverALSAMidi *>(p_udata);
uint64_t timestamp = 0;
while (!md->exit_thread.is_set()) {
md->lock();
InputConnection *connections = md->connected_inputs.ptrw();
size_t connection_count = md->connected_inputs.size();
for (size_t i = 0; i < connection_count; i++) {
connections[i].read_in(*md, timestamp, (int)i);
for (InputConnection &conn : md->connected_inputs) {
conn.read();
}
md->unlock();
OS::get_singleton()->delay_usec(1000);
@ -181,15 +80,25 @@ Error MIDIDriverALSAMidi::open() {
return ERR_CANT_OPEN;
}
int i = 0;
for (void **n = hints; *n != nullptr; n++) {
char *name = snd_device_name_get_hint(*n, "NAME");
lock();
int device_index = 0;
for (void **h = hints; *h != nullptr; h++) {
char *name = snd_device_name_get_hint(*h, "NAME");
if (name != nullptr) {
snd_rawmidi_t *midi_in;
int ret = snd_rawmidi_open(&midi_in, nullptr, name, SND_RAWMIDI_NONBLOCK);
if (ret >= 0) {
connected_inputs.insert(i++, InputConnection(midi_in));
// Get display name.
snd_rawmidi_info_t *info;
snd_rawmidi_info_malloc(&info);
snd_rawmidi_info(midi_in, info);
connected_input_names.push_back(snd_rawmidi_info_get_name(info));
snd_rawmidi_info_free(info);
connected_inputs.push_back(InputConnection(device_index, midi_in));
// Only increment device_index for successfully connected devices.
device_index++;
}
}
@ -198,6 +107,7 @@ Error MIDIDriverALSAMidi::open() {
}
}
snd_device_name_free_hint(hints);
unlock();
exit_thread.clear();
thread.start(MIDIDriverALSAMidi::thread_func, this);
@ -211,11 +121,12 @@ void MIDIDriverALSAMidi::close() {
thread.wait_to_finish();
}
for (int i = 0; i < connected_inputs.size(); i++) {
snd_rawmidi_t *midi_in = connected_inputs[i].rawmidi_ptr;
snd_rawmidi_close(midi_in);
for (const InputConnection &conn : connected_inputs) {
snd_rawmidi_close(conn.rawmidi_ptr);
}
connected_inputs.clear();
connected_input_names.clear();
}
void MIDIDriverALSAMidi::lock() const {
@ -226,24 +137,6 @@ void MIDIDriverALSAMidi::unlock() const {
mutex.unlock();
}
PackedStringArray MIDIDriverALSAMidi::get_connected_inputs() {
PackedStringArray list;
lock();
for (int i = 0; i < connected_inputs.size(); i++) {
snd_rawmidi_t *midi_in = connected_inputs[i].rawmidi_ptr;
snd_rawmidi_info_t *info;
snd_rawmidi_info_malloc(&info);
snd_rawmidi_info(midi_in, info);
list.push_back(snd_rawmidi_info_get_name(info));
snd_rawmidi_info_free(info);
}
unlock();
return list;
}
MIDIDriverALSAMidi::MIDIDriverALSAMidi() {
exit_thread.clear();
}

41
drivers/alsamidi/midi_driver_alsamidi.h
View File

@ -51,24 +51,15 @@ class MIDIDriverALSAMidi : public MIDIDriver {
Thread thread;
Mutex mutex;
class InputConnection {
public:
struct InputConnection {
InputConnection() = default;
InputConnection(snd_rawmidi_t *midi_in) :
rawmidi_ptr{ midi_in } {}
// Read in and parse available data, forwarding any complete messages through the driver.
int read_in(MIDIDriverALSAMidi &driver, uint64_t timestamp, int device_index);
InputConnection(int p_device_index, snd_rawmidi_t *p_rawmidi);
Parser parser;
snd_rawmidi_t *rawmidi_ptr = nullptr;
private:
static const size_t MSG_BUFFER_SIZE = 3;
uint8_t buffer[MSG_BUFFER_SIZE] = { 0 };
size_t expected_data = 0;
size_t received_data = 0;
bool skipping_sys_ex = false;
void parse_byte(uint8_t byte, MIDIDriverALSAMidi &driver, uint64_t timestamp, int device_index);
// Read in and parse available data, forwarding complete events to Input.
void read();
};
Vector<InputConnection> connected_inputs;
@ -77,30 +68,12 @@ class MIDIDriverALSAMidi : public MIDIDriver {
static void thread_func(void *p_udata);
enum class MessageCategory {
Data,
Voice,
SysExBegin,
SystemCommon, // excluding System Exclusive Begin/End
SysExEnd,
RealTime,
};
// If the passed byte is a status byte, return the associated message category,
// else return MessageCategory::Data.
static MessageCategory msg_category(uint8_t msg_part);
// Return the number of data bytes expected for the provided status byte.
static size_t msg_expected_data(uint8_t status_byte);
void lock() const;
void unlock() const;
public:
virtual Error open();
virtual void close();
virtual PackedStringArray get_connected_inputs();
virtual Error open() override;
virtual void close() override;
MIDIDriverALSAMidi();
virtual ~MIDIDriverALSAMidi();

77
drivers/coremidi/midi_driver_coremidi.cpp
View File

@ -37,16 +37,30 @@
#import <CoreAudio/HostTime.h>
#import <CoreServices/CoreServices.h>
Mutex MIDIDriverCoreMidi::mutex;
bool MIDIDriverCoreMidi::core_midi_closed = false;
MIDIDriverCoreMidi::InputConnection::InputConnection(int p_device_index, MIDIEndpointRef p_source) :
parser(p_device_index), source(p_source) {}
void MIDIDriverCoreMidi::read(const MIDIPacketList *packet_list, void *read_proc_ref_con, void *src_conn_ref_con) {
MIDIPacket *packet = const_cast<MIDIPacket *>(packet_list->packet);
int *device_index = static_cast<int *>(src_conn_ref_con);
for (UInt32 i = 0; i < packet_list->numPackets; i++) {
receive_input_packet(*device_index, packet->timeStamp, packet->data, packet->length);
MutexLock lock(mutex);
if (!core_midi_closed) {
InputConnection *source = static_cast<InputConnection *>(src_conn_ref_con);
const MIDIPacket *packet = packet_list->packet;
for (UInt32 packet_index = 0; packet_index < packet_list->numPackets; packet_index++) {
for (UInt16 data_index = 0; data_index < packet->length; data_index++) {
source->parser.parse_fragment(packet->data[data_index]);
}
packet = MIDIPacketNext(packet);
}
}
}
Error MIDIDriverCoreMidi::open() {
ERR_FAIL_COND_V_MSG(client || core_midi_closed, FAILED,
"MIDIDriverCoreMidi cannot be reopened.");
CFStringRef name = CFStringCreateWithCString(nullptr, "Godot", kCFStringEncodingASCII);
OSStatus result = MIDIClientCreate(name, nullptr, nullptr, &client);
CFRelease(name);
@ -61,12 +75,27 @@ Error MIDIDriverCoreMidi::open() {
return ERR_CANT_OPEN;
}
int sources = MIDIGetNumberOfSources();
for (int i = 0; i < sources; i++) {
int source_count = MIDIGetNumberOfSources();
int connection_index = 0;
for (int i = 0; i < source_count; i++) {
MIDIEndpointRef source = MIDIGetSource(i);
if (source) {
MIDIPortConnectSource(port_in, source, static_cast<void *>(&i));
connected_sources.insert(i, source);
InputConnection *conn = memnew(InputConnection(connection_index, source));
const OSStatus res = MIDIPortConnectSource(port_in, source, static_cast<void *>(conn));
if (res != noErr) {
memdelete(conn);
} else {
connected_sources.push_back(conn);
CFStringRef nameRef = nullptr;
char name[256];
MIDIObjectGetStringProperty(source, kMIDIPropertyDisplayName, &nameRef);
CFStringGetCString(nameRef, name, sizeof(name), kCFStringEncodingUTF8);
CFRelease(nameRef);
connected_input_names.push_back(name);
connection_index++; // Contiguous index for successfully connected inputs.
}
}
}
@ -74,11 +103,17 @@ Error MIDIDriverCoreMidi::open() {
}
void MIDIDriverCoreMidi::close() {
for (int i = 0; i < connected_sources.size(); i++) {
MIDIEndpointRef source = connected_sources[i];
MIDIPortDisconnectSource(port_in, source);
mutex.lock();
core_midi_closed = true;
mutex.unlock();
for (InputConnection *conn : connected_sources) {
MIDIPortDisconnectSource(port_in, conn->source);
memdelete(conn);
}
connected_sources.clear();
connected_input_names.clear();
if (port_in != 0) {
MIDIPortDispose(port_in);
@ -91,26 +126,6 @@ void MIDIDriverCoreMidi::close() {
}
}
PackedStringArray MIDIDriverCoreMidi::get_connected_inputs() {
PackedStringArray list;
for (int i = 0; i < connected_sources.size(); i++) {
MIDIEndpointRef source = connected_sources[i];
CFStringRef ref = nullptr;
char name[256];
MIDIObjectGetStringProperty(source, kMIDIPropertyDisplayName, &ref);
CFStringGetCString(ref, name, sizeof(name), kCFStringEncodingUTF8);
CFRelease(ref);
list.push_back(name);
}
return list;
}
MIDIDriverCoreMidi::MIDIDriverCoreMidi() {}
MIDIDriverCoreMidi::~MIDIDriverCoreMidi() {
close();
}

21
drivers/coremidi/midi_driver_coremidi.h
View File

@ -34,6 +34,7 @@
#ifdef COREMIDI_ENABLED
#include "core/os/midi_driver.h"
#include "core/os/mutex.h"
#include "core/templates/vector.h"
#import <CoreMIDI/CoreMIDI.h>
@ -43,17 +44,25 @@ class MIDIDriverCoreMidi : public MIDIDriver {
MIDIClientRef client = 0;
MIDIPortRef port_in;
Vector<MIDIEndpointRef> connected_sources;
struct InputConnection {
InputConnection() = default;
InputConnection(int p_device_index, MIDIEndpointRef p_source);
Parser parser;
MIDIEndpointRef source;
};
Vector<InputConnection *> connected_sources;
static Mutex mutex;
static bool core_midi_closed;
static void read(const MIDIPacketList *packet_list, void *read_proc_ref_con, void *src_conn_ref_con);
public:
virtual Error open();
virtual void close();
virtual Error open() override;
virtual void close() override;
PackedStringArray get_connected_inputs();
MIDIDriverCoreMidi();
MIDIDriverCoreMidi() = default;
virtual ~MIDIDriverCoreMidi();
};

55
drivers/winmidi/midi_driver_winmidi.cpp
View File

@ -36,26 +36,42 @@
void MIDIDriverWinMidi::read(HMIDIIN hMidiIn, UINT wMsg, DWORD_PTR dwInstance, DWORD_PTR dwParam1, DWORD_PTR dwParam2) {
if (wMsg == MIM_DATA) {
receive_input_packet((int)dwInstance, (uint64_t)dwParam2, (uint8_t *)&dwParam1, 3);
// For MIM_DATA: dwParam1 = wMidiMessage, dwParam2 = dwTimestamp.
// Windows implementation has already unpacked running status and dropped any SysEx,
// so we can just forward straight to the event.
const uint8_t *midi_msg = (uint8_t *)&dwParam1;
send_event((int)dwInstance, midi_msg[0], &midi_msg[1], 2);
}
}
Error MIDIDriverWinMidi::open() {
int device_index = 0;
for (UINT i = 0; i < midiInGetNumDevs(); i++) {
HMIDIIN midi_in;
MIDIINCAPS caps;
MMRESULT res = midiInOpen(&midi_in, i, (DWORD_PTR)read, (DWORD_PTR)i, CALLBACK_FUNCTION);
if (res == MMSYSERR_NOERROR) {
MMRESULT open_res = midiInOpen(&midi_in, i, (DWORD_PTR)read,
(DWORD_PTR)device_index, CALLBACK_FUNCTION);
MMRESULT caps_res = midiInGetDevCaps(i, &caps, sizeof(MIDIINCAPS));
if (open_res == MMSYSERR_NOERROR) {
midiInStart(midi_in);
connected_sources.insert(i, midi_in);
connected_sources.push_back(midi_in);
if (caps_res == MMSYSERR_NOERROR) {
connected_input_names.push_back(caps.szPname);
} else {
// Should push something even if we don't get a name,
// so that the IDs line up correctly on the script side.
connected_input_names.push_back("ERROR");
}
// Only increment device index for successfully connected devices.
device_index++;
} else {
char err[256];
midiInGetErrorText(res, err, 256);
midiInGetErrorText(open_res, err, 256);
ERR_PRINT("midiInOpen error: " + String(err));
MIDIINCAPS caps;
res = midiInGetDevCaps(i, &caps, sizeof(MIDIINCAPS));
if (res == MMSYSERR_NOERROR) {
if (caps_res == MMSYSERR_NOERROR) {
ERR_PRINT("Can't open MIDI device \"" + String(caps.szPname) + "\", is it being used by another application?");
}
}
@ -64,25 +80,6 @@ Error MIDIDriverWinMidi::open() {
return OK;
}
PackedStringArray MIDIDriverWinMidi::get_connected_inputs() {
PackedStringArray list;
for (int i = 0; i < connected_sources.size(); i++) {
HMIDIIN midi_in = connected_sources[i];
UINT id = 0;
MMRESULT res = midiInGetID(midi_in, &id);
if (res == MMSYSERR_NOERROR) {
MIDIINCAPS caps;
res = midiInGetDevCaps(i, &caps, sizeof(MIDIINCAPS));
if (res == MMSYSERR_NOERROR) {
list.push_back(caps.szPname);
}
}
}
return list;
}
void MIDIDriverWinMidi::close() {
for (int i = 0; i < connected_sources.size(); i++) {
HMIDIIN midi_in = connected_sources[i];
@ -90,9 +87,7 @@ void MIDIDriverWinMidi::close() {
midiInClose(midi_in);
}
connected_sources.clear();
}
MIDIDriverWinMidi::MIDIDriverWinMidi() {
connected_input_names.clear();
}
MIDIDriverWinMidi::~MIDIDriverWinMidi() {

8
drivers/winmidi/midi_driver_winmidi.h
View File

@ -48,12 +48,10 @@ class MIDIDriverWinMidi : public MIDIDriver {
static void CALLBACK read(HMIDIIN hMidiIn, UINT wMsg, DWORD_PTR dwInstance, DWORD_PTR dwParam1, DWORD_PTR dwParam2);
public:
virtual Error open();
virtual void close();
virtual Error open() override;
virtual void close() override;
virtual PackedStringArray get_connected_inputs();
MIDIDriverWinMidi();
MIDIDriverWinMidi() = default;
virtual ~MIDIDriverWinMidi();
};