0be6d925dc
Which means that reduz' beloved style which we all became used to will now be changed automatically to remove the first empty line. This makes us lean closer to 1TBS (the one true brace style) instead of hybridating it with some Allman-inspired spacing. There's still the case of braces around single-statement blocks that needs to be addressed (but clang-format can't help with that, but clang-tidy may if we agree about it). Part of #33027.
209 lines
6.0 KiB
C++
209 lines
6.0 KiB
C++
/*************************************************************************/
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/* midi_driver_alsamidi.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifdef ALSAMIDI_ENABLED
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#include "midi_driver_alsamidi.h"
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#include "core/os/os.h"
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#include "core/print_string.h"
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#include <errno.h>
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static int get_message_size(uint8_t message) {
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switch (message & 0xF0) {
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case 0x80: // note off
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case 0x90: // note on
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case 0xA0: // aftertouch
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case 0xB0: // continuous controller
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case 0xE0: // pitch bend
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case 0xF2: // song position pointer
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return 3;
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case 0xC0: // patch change
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case 0xD0: // channel pressure
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case 0xF1: // time code quarter frame
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case 0xF3: // song select
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return 2;
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case 0xF0: // SysEx start
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case 0xF4: // reserved
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case 0xF5: // reserved
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case 0xF6: // tune request
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case 0xF7: // SysEx end
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case 0xF8: // timing clock
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case 0xF9: // reserved
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case 0xFA: // start
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case 0xFB: // continue
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case 0xFC: // stop
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case 0xFD: // reserved
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case 0xFE: // active sensing
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case 0xFF: // reset
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return 1;
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}
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return 256;
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}
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void MIDIDriverALSAMidi::thread_func(void *p_udata) {
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MIDIDriverALSAMidi *md = (MIDIDriverALSAMidi *)p_udata;
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uint64_t timestamp = 0;
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uint8_t buffer[256];
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int expected_size = 255;
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int bytes = 0;
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while (!md->exit_thread) {
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int ret;
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md->lock();
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for (int i = 0; i < md->connected_inputs.size(); i++) {
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snd_rawmidi_t *midi_in = md->connected_inputs[i];
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do {
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uint8_t byte = 0;
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ret = snd_rawmidi_read(midi_in, &byte, 1);
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if (ret < 0) {
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if (ret != -EAGAIN) {
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ERR_PRINT("snd_rawmidi_read error: " + String(snd_strerror(ret)));
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}
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} else {
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if (byte & 0x80) {
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// Flush previous packet if there is any
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if (bytes) {
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md->receive_input_packet(timestamp, buffer, bytes);
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bytes = 0;
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}
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expected_size = get_message_size(byte);
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// After a SysEx start, all bytes are data until a SysEx end, so
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// we're going to end the command at the SES, and let the common
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// driver ignore the following data bytes.
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}
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if (bytes < 256) {
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buffer[bytes++] = byte;
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// If we know the size of the current packet receive it if it reached the expected size
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if (bytes >= expected_size) {
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md->receive_input_packet(timestamp, buffer, bytes);
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bytes = 0;
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}
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}
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}
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} while (ret > 0);
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}
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md->unlock();
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OS::get_singleton()->delay_usec(1000);
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}
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}
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Error MIDIDriverALSAMidi::open() {
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void **hints;
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if (snd_device_name_hint(-1, "rawmidi", &hints) < 0)
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return ERR_CANT_OPEN;
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int i = 0;
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for (void **n = hints; *n != nullptr; n++) {
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char *name = snd_device_name_get_hint(*n, "NAME");
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if (name != nullptr) {
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snd_rawmidi_t *midi_in;
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int ret = snd_rawmidi_open(&midi_in, nullptr, name, SND_RAWMIDI_NONBLOCK);
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if (ret >= 0) {
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connected_inputs.insert(i++, midi_in);
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}
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}
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if (name != nullptr)
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free(name);
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}
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snd_device_name_free_hint(hints);
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exit_thread = false;
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thread = Thread::create(MIDIDriverALSAMidi::thread_func, this);
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return OK;
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}
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void MIDIDriverALSAMidi::close() {
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if (thread) {
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exit_thread = true;
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Thread::wait_to_finish(thread);
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memdelete(thread);
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thread = nullptr;
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}
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for (int i = 0; i < connected_inputs.size(); i++) {
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snd_rawmidi_t *midi_in = connected_inputs[i];
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snd_rawmidi_close(midi_in);
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}
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connected_inputs.clear();
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}
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void MIDIDriverALSAMidi::lock() const {
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mutex.lock();
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}
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void MIDIDriverALSAMidi::unlock() const {
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mutex.unlock();
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}
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PackedStringArray MIDIDriverALSAMidi::get_connected_inputs() {
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PackedStringArray list;
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lock();
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for (int i = 0; i < connected_inputs.size(); i++) {
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snd_rawmidi_t *midi_in = connected_inputs[i];
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snd_rawmidi_info_t *info;
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snd_rawmidi_info_malloc(&info);
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snd_rawmidi_info(midi_in, info);
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list.push_back(snd_rawmidi_info_get_name(info));
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snd_rawmidi_info_free(info);
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}
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unlock();
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return list;
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}
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MIDIDriverALSAMidi::MIDIDriverALSAMidi() {
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thread = nullptr;
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exit_thread = false;
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}
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MIDIDriverALSAMidi::~MIDIDriverALSAMidi() {
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close();
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}
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#endif // ALSAMIDI_ENABLED
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