Function MidiThreadProc

src/music/dmusic.cpp:576–826

}

static void MidiThreadProc()
{
	Debug(driver, 2, "DMusic: Entering playback thread");

	REFERENCE_TIME last_volume_time = 0; // timestamp of the last volume change
	REFERENCE_TIME block_time = 0;       // timestamp of the last block sent to the port
	REFERENCE_TIME playback_start_time;  // timestamp current file began playback
	MidiFile current_file;               // file currently being played from
	PlaybackSegment current_segment;     // segment info for current playback
	size_t current_block = 0;            // next block index to send
	uint8_t current_volume = 0;             // current effective volume setting
	std::array<uint8_t, 16> channel_volumes; // last seen volume controller values in raw data

	/* Get pointer to the reference clock of our output port. */
	IReferenceClock *clock;
	_port->GetLatencyClock(&clock);

	REFERENCE_TIME cur_time;
	clock->GetTime(&cur_time);

	_port->PlayBuffer(_buffer);
	_buffer->Flush();

	DWORD next_timeout = 1000;
	while (true) {
		/* Wait for a signal from the GUI thread or until the time for the next event has come. */
		DWORD wfso = WaitForSingleObject(_thread_event, next_timeout);

		if (_playback.shutdown) {
			_playback.playing = false;
			break;
		}

		if (_playback.do_stop) {
			Debug(driver, 2, "DMusic thread: Stopping playback");

			/* Turn all notes off and wait a bit to allow the messages to be handled. */
			clock->GetTime(&cur_time);
			TransmitNotesOff(_buffer, block_time, cur_time);

			_playback.playing = false;
			_playback.do_stop = false;
			block_time = 0;
			next_timeout = 1000;
			continue;
		}

		if (wfso == WAIT_OBJECT_0) {
			if (_playback.do_start) {
				Debug(driver, 2, "DMusic thread: Starting playback");
				{
					/* New scope to limit the time the mutex is locked. */
					std::lock_guard<std::mutex> lock(_thread_mutex);

					current_file.MoveFrom(_playback.next_file);
					std::swap(_playback.next_segment, current_segment);
					current_segment.start_block = 0;
					current_block = 0;