From 0006f4d8cd65eeaaf66517c02f987b0c40282c65 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Sat, 3 Jun 2023 19:08:20 +0200
Subject: [PATCH] Dummy: add MMC test sequence

---
 libs/backends/dummy/dummy_audiobackend.cc | 40 ++++++++++++++++++++++-
 libs/backends/dummy/dummy_midi_seq.h      | 10 ++++--
 2 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/libs/backends/dummy/dummy_audiobackend.cc b/libs/backends/dummy/dummy_audiobackend.cc
index ffae6273ae..9c757d95ab 100644
--- a/libs/backends/dummy/dummy_audiobackend.cc
+++ b/libs/backends/dummy/dummy_audiobackend.cc
@@ -1738,7 +1738,45 @@ void DummyMidiPort::midi_generate (const pframes_t n_samples)
 		return;
 	}
 
-	if (_midi_seq_dat[0].beat_time < -1) {
+	if (_midi_seq_dat[0].beat_time < -2) {
+		static const uint8_t mmc_seq[][14] = {
+			{13, 0xf0, 0x7f, 0x7f, 0x06, 0x44, 0x06, 0x01,  // Locate to 00:01:02:03
+			     /*H*/ 0x00, /*M*/ 0x01, /*S*/ 0x02, /*F*/ 0x03, /*SF*/ 0x00, 0xf7},
+			{ 6, 0xf0, 0x7f, 0x7f, 0x06, 0x01, 0xf7}, // Stop
+			{ 6, 0xf0, 0x7f, 0x7f, 0x06, 0x02, 0xf7}, // Play
+			{ 6, 0xf0, 0x7f, 0x7f, 0x06, 0x01, 0xf7}, // Stop
+			{ 6, 0xf0, 0x7f, 0x7f, 0x06, 0x04, 0xf7}, // Fast Foward
+			{ 6, 0xf0, 0x7f, 0x7f, 0x06, 0x02, 0xf7}, // Roll
+			{ 6, 0xf0, 0x7f, 0x7f, 0x06, 0x05, 0xf7}, // Rewind
+			{ 6, 0xf0, 0x7f, 0x7f, 0x06, 0x01, 0xf7}, // Stop
+			{13, 0xf0, 0x7f, 0x7f, 0x06, 0x44, 0x06, 0x01,  // Locate to 00:00:00:00
+			     /*H*/ 0x00, /*M*/ 0x00, /*S*/ 0x00, /*F*/ 0x00, /*SF*/ 0x00, 0xf7},
+			{ 6, 0xf0, 0x7f, 0x7f, 0x06, 0x03, 0xf7}, // Deferred Play
+			{ 6, 0xf0, 0x7f, 0x7f, 0x06, 0x09, 0xf7}, // Pause
+			{ 6, 0xf0, 0x7f, 0x7f, 0x06, 0x06, 0xf7}, // Record Strobe (implies play)
+			{ 6, 0xf0, 0x7f, 0x7f, 0x06, 0x07, 0xf7}, // Record Exit (keeps rolling)
+			{ 6, 0xf0, 0x7f, 0x7f, 0x06, 0x08, 0xf7}, // Record Pause (rec again)
+			{ 6, 0xf0, 0x7f, 0x7f, 0x06, 0x09, 0xf7}, // Pause
+			{ 6, 0xf0, 0x7f, 0x7f, 0x06, 0x01, 0xf7}, // Stop
+			{10, 0xf0, 0x7f, 0x7f, 0x06, 0x47, 0x03,  // Shuttle (set speed)
+			     /*SH*/ 0x02, /*SM*/ 0x40, /*SL*/ 0x00, 0xf7}, // 2 + 8192 / 16384
+			{ 6, 0xf0, 0x7f, 0x7f, 0x06, 0x02, 0xf7}, // Play
+			// TODO cmdStep(0x48), cmdWrite(0x40/0x41)+recArm(0x4f), cmdWrite(0x40/0x41)+mute(0x62)
+		};
+		/* MMC */
+		pframes_t pp = pulse_position ();
+		if (pp < n_samples - 1) {
+			static const int dly_sec = 3;
+			int n_cmds = sizeof (mmc_seq) / sizeof (mmc_seq[0]);
+			if (0 == (_midi_seq_time % dly_sec)) {
+				int seq = _midi_seq_time / dly_sec;
+				_buffer.push_back (std::shared_ptr<DummyMidiEvent>(new DummyMidiEvent (pp, &mmc_seq[seq][1], mmc_seq[seq][0])));
+			}
+			_midi_seq_time = (_midi_seq_time + 1) % (dly_sec * n_cmds);
+		}
+		return;
+
+	} else if (_midi_seq_dat[0].beat_time < -1) {
 		/* MTC generator */
 		const int audio_samples_per_video_frame = _midi_seq_spb; // sample-rate / 25
 		const int audio_samples_per_qf =  audio_samples_per_video_frame / 4;
diff --git a/libs/backends/dummy/dummy_midi_seq.h b/libs/backends/dummy/dummy_midi_seq.h
index 94a5b9cda7..69b348238c 100644
--- a/libs/backends/dummy/dummy_midi_seq.h
+++ b/libs/backends/dummy/dummy_midi_seq.h
@@ -787,8 +787,13 @@ static const MIDISequence s9[] = {
 	{-1.0, 0, {0} }, // MClk Generator
 };
 
+static const MIDISequence s10[] = {
+	{-3.0, 0, {0} }, // MMC Generator
+};
+
+
 static const MIDISequence *sequences[] = {
-	s0, s1, s2, s3, s4, s5, s6, s7, s8, s9
+	s0, s1, s2, s3, s4, s5, s6, s7, s8, s9, s10
 };
 
 static const char *sequence_names[] = {
@@ -801,7 +806,8 @@ static const char *sequence_names[] = {
 	"Aftertouch",
 	"Nonsense, Dups",
 	"MTC 25fps",
-	"MClk 120 BPM"
+	"MClk 120 BPM",
+	"MMC SysEx"
 };
 
 }} // namespace