/////////////////////////////////////////////////////////////////////////////
// Initialisation
/////////////////////////////////////////////////////////////////////////////
s32 SEQ_Init(u32 mode)
{
// initialize the Notestack
#if 0
NOTESTACK_Init(¬estack, NOTESTACK_MODE_PUSH_TOP, ¬estack_items[0], NOTESTACK_SIZE);
#else
// for an arpeggiator we prefer sorted mode
// activate hold mode as well. Stack will be cleared whenever no note is played anymore
NOTESTACK_Init(¬estack, NOTESTACK_MODE_SORT_HOLD, ¬estack_items[0], NOTESTACK_SIZE);
#endif
// and the arp counter
arp_counter = 0;
// reset sequencer
SEQ_Reset();
// init BPM generator
SEQ_BPM_Init(0);
SEQ_BPM_PPQN_Set(384);
SEQ_BPM_Set(120.0);
return 0; // no error
}
/////////////////////////////////////////////////////////////////////////////
// Resets song position of sequencer
/////////////////////////////////////////////////////////////////////////////
s32 SEQ_Reset(u8 play_off_events)
{
// since timebase has been changed, ensure that Off-Events are played
// (otherwise they will be played much later...)
if( play_off_events )
SEQ_PlayOffEvents();
// release pause and FFWD mode
seq_pause = 0;
ffwd_silent_mode = 0;
next_prefetch = 0;
prefetch_offset = 0;
// restart song
MID_PARSER_RestartSong();
// set initial BPM (according to MIDI file spec)
SEQ_BPM_PPQN_Set(384); // not specified
SEQ_BPM_Set(120.0);
// reset BPM tick
SEQ_BPM_TickSet(0);
return 0; // no error
}
void Clocks_Init(void) {
SEQ_BPM_TickSet(0); // reset sequencer
SEQ_BPM_Init(0); // initialize SEQ module sequencer
SEQ_BPM_PPQN_Set(VXPPQN); // set internal clock resolution as per the define (usually 384)
MClock_SetBPM(100.0); // Master BPM
mClock.status.all = 0; // bit 7 is run/stop
mClock.ticked = 0; // we haven't gotten that far yet
mClock.timesigu = 4; // Upper value of the Master Time Signature, min 2
mClock.timesigl = 4; // Lower value of the Master Time Signature, min 2
mClock.res = SEQ_BPM_PPQN_Get(); // fill this from the SEQ_BPM module to be safe
mClock.rt_latency = VXLATENCY; // initialise from define
MClock_Init(); // init the vX master clock
MClock_Reset();
}
/////////////////////////////////////////////////////////////////////////////
// called when a Meta event should be played/processed at a given tick
/////////////////////////////////////////////////////////////////////////////
static s32 SEQ_PlayMeta(u8 track, u8 meta, u32 len, u8 *buffer, u32 tick)
{
switch( meta ) {
case 0x00: // Sequence Number
if( len == 2 ) {
u32 seq_number = (buffer[0] << 8) | buffer[1];
#if DEBUG_VERBOSE_LEVEL >= 2
DEBUG_MSG("[SEQ:%d:%u] Meta - Sequence Number %u\n", track, tick, seq_number);
#endif
} else {
#if DEBUG_VERBOSE_LEVEL >= 2
DEBUG_MSG("[SEQ:%d:%u] Meta - Sequence Number with %d bytes -- ERROR: expecting 2 bytes!\n", track, tick, len);
#endif
}
break;
case 0x01: // Text Event
#if DEBUG_VERBOSE_LEVEL >= 2
DEBUG_MSG("[SEQ:%d:%u] Meta - Text: %s\n", track, tick, buffer);
#endif
break;
case 0x02: // Copyright Notice
#if DEBUG_VERBOSE_LEVEL >= 2
DEBUG_MSG("[SEQ:%d:%u] Meta - Copyright: %s\n", track, tick, buffer);
#endif
break;
case 0x03: // Sequence/Track Name
#if DEBUG_VERBOSE_LEVEL >= 2
DEBUG_MSG("[SEQ:%d:%u] Meta - Track Name: %s\n", track, tick, buffer);
#endif
break;
case 0x04: // Instrument Name
#if DEBUG_VERBOSE_LEVEL >= 2
DEBUG_MSG("[SEQ:%d:%u] Meta - Instr. Name: %s\n", track, tick, buffer);
#endif
break;
case 0x05: // Lyric
#if DEBUG_VERBOSE_LEVEL >= 2
DEBUG_MSG("[SEQ:%d:%u] Meta - Lyric: %s\n", track, tick, buffer);
#endif
break;
case 0x06: // Marker
#if DEBUG_VERBOSE_LEVEL >= 2
DEBUG_MSG("[SEQ:%d:%u] Meta - Marker: %s\n", track, tick, buffer);
#endif
break;
case 0x07: // Cue Point
#if DEBUG_VERBOSE_LEVEL >= 2
DEBUG_MSG("[SEQ:%d:%u] Meta - Cue Point: %s\n", track, tick, buffer);
#endif
break;
case 0x20: // Channel Prefix
if( len == 1 ) {
u32 prefix = *buffer;
#if DEBUG_VERBOSE_LEVEL >= 2
DEBUG_MSG("[SEQ:%d:%u] Meta - Channel Prefix %u\n", track, tick, prefix);
#endif
} else {
#if DEBUG_VERBOSE_LEVEL >= 2
DEBUG_MSG("[SEQ:%d:%u] Meta - Channel Prefix with %d bytes -- ERROR: expecting 1 byte!\n", track, tick, len);
#endif
}
break;
case 0x2f: // End of Track
#if DEBUG_VERBOSE_LEVEL >= 2
DEBUG_MSG("[SEQ:%d:%u] Meta - End of Track\n", track, tick, meta);
#endif
break;
case 0x51: // Set Tempo
if( len == 3 ) {
u32 tempo_us = (buffer[0] << 16) | (buffer[1] << 8) | buffer[2];
float bpm = 60.0 * (1E6 / (float)tempo_us);
SEQ_BPM_PPQN_Set(MIDI_PARSER_PPQN_Get());
// set tempo immediately on first tick
if( tick == 0 ) {
SEQ_BPM_Set(bpm);
} else {
// put tempo change request into the queue
mios32_midi_package_t tempo_package; // or Softis?
tempo_package.ALL = (u32)bpm;
SEQ_MIDI_OUT_Send(DEFAULT, tempo_package, SEQ_MIDI_OUT_TempoEvent, tick, 0);
}
#if DEBUG_VERBOSE_LEVEL >= 2
DEBUG_MSG("[SEQ:%d:%u] Meta - Tempo to %u uS -> %u BPM\n", track, tick, tempo_us, (u32)bpm);
#endif
} else {
#if DEBUG_VERBOSE_LEVEL >= 2
DEBUG_MSG("[SEQ:%d:%u] Meta - Tempo with %u bytes -- ERROR: expecting 3 bytes!\n", track, tick, len);
#endif
}
break;
// other known events which are not handled here:
// 0x54: SMPTE offset
// 0x58: Time Signature
// 0x59: Key Signature
// 0x7f: Sequencer Specific Meta Event
#if DEBUG_VERBOSE_LEVEL >= 2
default:
DEBUG_MSG("[SEQ:%d:%u] Meta Event 0x%02x with length %u not processed\n", track, tick, meta, len);
#endif
}
return 0;
}
