- if (read_space() == 0) {
- //std::cerr << "MRB: NO READ SPACE" << std::endl;
- return 0;
- }
-
- Evoral::EventTime ev_time;
- Evoral::EventType ev_type;
- uint32_t ev_size;
-
- size_t count = 0;
-
- //std::cerr << "MRB read " << start << " .. " << end << " + " << offset << std::endl;
-
- while (read_space() >= sizeof(Evoral::EventTime) + sizeof(Evoral::EventType) + sizeof(uint32_t)) {
-
- full_peek(sizeof(Evoral::EventTime), (uint8_t*)&ev_time);
-
- if (ev_time > end) {
- //std::cerr << "MRB: PAST END (" << ev_time << " : " << end << ")" << std::endl;
- break;
- } else if (ev_time < start) {
- //std::cerr << "MRB (start " << start << ") - Skipping event at (too early) time " << ev_time << std::endl;
- break;
- }
-
- bool success = read_prefix(&ev_time, &ev_type, &ev_size);
- if (!success) {
- std::cerr << "WARNING: error reading event prefix from MIDI ring" << std::endl;
- continue;
- }
-
- // This event marks a loop happening. this means that
- // the next events timestamp will be non-monotonic.
- if (ev_type == LoopEventType) {
- ev_time -= start;
- ev_time += offset;
- Evoral::MIDIEvent loopevent(LoopEventType, ev_time);
- dst.push_back(loopevent);
-
-
- // We can safely return, without reading the data, because
- // a LoopEvent does not have data.
- return count + 1;
- }
-
- uint8_t status;
- success = full_peek(sizeof(uint8_t), &status);
- assert(success); // If this failed, buffer is corrupt, all hope is lost
-
- // Ignore event if it doesn't match channel filter
- if (is_channel_event(status) && get_channel_mode() == FilterChannels) {
- const uint8_t channel = status & 0x0F;
- if ( !(get_channel_mask() & (1L << channel)) ) {
- //std::cerr << "MRB skipping event due to channel mask" << std::endl;
- skip(ev_size); // Advance read pointer to next event
- continue;
- }
- }
-
- //std::cerr << "MRB " << this << " - Reading event, time = "
- // << ev_time << " - " << start << " => " << ev_time - start
- // << ", size = " << ev_size << std::endl;
-
- assert(ev_time >= start);
- ev_time -= start;
- ev_time += offset;
-
- uint8_t* write_loc = dst.reserve(ev_time, ev_size);
- if (write_loc == NULL) {
- //std::cerr << "MRB: Unable to reserve space in buffer, event skipped";
- continue;
- }
-
- success = Evoral::EventRingBuffer::full_read(ev_size, write_loc);
-
- if (success) {
- if (is_channel_event(status) && get_channel_mode() == ForceChannel) {
- write_loc[0] = (write_loc[0] & 0xF0) | (get_channel_mask() & 0x0F);
- }
- ++count;
- //std::cerr << "MRB - read event at time " << ev_time << std::endl;
- } else {
- std::cerr << "WARNING: error reading event contents from MIDI ring" << std::endl;
- }
- }
-
- //std::cerr << "MTB read space: " << read_space() << std::endl;
-
- return count;