151 lines
2.6 KiB
C++
151 lines
2.6 KiB
C++
/* $Id$ */
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#include <stdio.h>
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#include "loop.h"
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Loop::Loop()
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{
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m_length = 0;
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m_position = 0;
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m_state = LS_IDLE;
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}
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Loop::~Loop()
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{
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}
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void Loop::PlayFrame(void *port_buffer, jack_nframes_t frame)
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{
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if (m_state == LS_IDLE) return;
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if (m_state == LS_STOPPING) {
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printf("Stopping, so send all notes off!\n");
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uint8_t buffer[3];
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buffer[1] = 0x78;
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buffer[2] = 0;
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for (int i = 0; i < 16; i++) {
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buffer[0] = 0xB0 + i;
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jack_midi_event_write(port_buffer, frame, buffer, sizeof buffer);
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}
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m_state = LS_IDLE;
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return;
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}
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for (; m_iterator != m_events.end(); ++m_iterator) {
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jack_midi_event_t &event = (*m_iterator).first;
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jack_nframes_t position = (*m_iterator).second;
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if (event.time + position > m_position) break;
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jack_midi_event_write(port_buffer, frame, event.buffer, event.size);
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}
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m_position++;
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if (m_position == m_length) {
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if (m_state == LS_PLAY_ONCE) {
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m_state = LS_IDLE;
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}
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printf("Completed %u frames\n", m_position);
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m_position = 0;
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m_iterator = m_events.begin();
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}
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}
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void Loop::AddEvent(jack_nframes_t position, jack_midi_event_t *event)
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{
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Event e;
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e.first = *event;
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e.second = position;
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m_events.push_back(e);
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}
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void Loop::SetLength(jack_nframes_t length)
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{
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if (m_state != LS_IDLE) return;
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m_length = length;
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}
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void Loop::Start(bool loop)
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{
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if (m_state != LS_IDLE) return;
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if (m_length == 0) return;
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m_position = 0;
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m_iterator = m_events.begin();
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m_state = loop ? LS_PLAY_LOOP : LS_PLAY_ONCE;
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}
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void Loop::Stop()
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{
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if (m_state == LS_PLAY_ONCE || m_state == LS_PLAY_LOOP) {
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m_state = LS_STOPPING;
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}
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}
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void Loop::StartFromNoteCache(NoteCache &cache)
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{
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for (uint8_t c = 0; c < 16; c++) {
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for (uint8_t n = 0; n < 128; n++) {
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int8_t v = cache.GetNote(c, n);
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if (v > 0) {
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uint8_t *buffer = (uint8_t *)malloc(3);
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buffer[0] = 0x90 + c;
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buffer[1] = n;
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buffer[2] = v;
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jack_midi_event_t event;
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event.time = 0;
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event.buffer = buffer;
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event.size = 3;
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AddEvent(0, &event);
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}
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}
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}
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}
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void Loop::EndFromNoteCache(NoteCache &cache)
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{
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for (uint8_t c = 0; c < 16; c++) {
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for (uint8_t n = 0; n < 128; n++) {
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int8_t v = cache.GetNote(c, n);
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if (v > 0) {
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uint8_t *buffer = (uint8_t *)malloc(3);
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buffer[0] = 0x80 + c;
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buffer[1] = n;
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buffer[2] = 0;
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jack_midi_event_t event;
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event.time = 0;
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event.buffer = buffer;
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event.size = 3;
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AddEvent(m_length - 1, &event);
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}
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}
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}
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}
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void Loop::Empty()
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{
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if (m_state != LS_IDLE) return;
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m_length = 0;
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m_position = 0;
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for (m_iterator = m_events.begin(); m_iterator != m_events.end(); ++m_iterator) {
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jack_midi_event_t &event = (*m_iterator).first;
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free(event.buffer);
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}
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m_events.clear();
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}
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