/*
- Copyright (C) 2006 Paul Davis
+ Copyright (C) 2006 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include <iostream>
#include <algorithm>
-#include <ardour/types.h>
-#include <ardour/buffer.h>
-#include <ardour/event_type_map.h>
-#include <evoral/EventSink.hpp>
-#include <evoral/EventRingBuffer.hpp>
+
+#include "ardour/event_ring_buffer.h"
+#include "ardour/libardour_visibility.h"
+#include "ardour/types.h"
+#include "ardour/midi_state_tracker.h"
namespace ARDOUR {
+class MidiBuffer;
/** A RingBuffer for (MIDI) events.
*
*
* [timestamp][type][size][size bytes of raw MIDI][timestamp][type][size](etc...)
*/
-class MidiRingBuffer : public Evoral::EventRingBuffer {
+template<typename T>
+class /*LIBARDOUR_API*/ MidiRingBuffer : public EventRingBuffer<T> {
public:
- /** @param size Size in bytes.
- */
- MidiRingBuffer(size_t size)
- : Evoral::EventRingBuffer(size)
- , _channel_mask(0x0000FFFF)
- {}
-
- inline bool read_prefix(Evoral::EventTime* time, Evoral::EventType* type, uint32_t* size);
+ /** @param size Size in bytes. */
+ MidiRingBuffer(size_t size) : EventRingBuffer<T>(size) {}
+
+ inline bool read_prefix(T* time, Evoral::EventType* type, uint32_t* size);
inline bool read_contents(uint32_t size, uint8_t* buf);
- size_t read(MidiBuffer& dst, nframes_t start, nframes_t end, nframes_t offset=0);
-
- /** Set the channel filtering mode.
- * @param mask If mode is FilterChannels, each bit represents a midi channel:
- * bit 0 = channel 0, bit 1 = channel 1 etc. the read and write methods will only
- * process events whose channel bit is 1.
- * If mode is ForceChannel, mask is simply a channel number which all events will
- * be forced to while reading.
- */
- void set_channel_mode(ChannelMode mode, uint16_t mask) {
- g_atomic_int_set(&_channel_mask, ((uint16_t)mode << 16) | mask);
- }
+ size_t read(MidiBuffer& dst, framepos_t start, framepos_t end, framecnt_t offset=0, bool stop_on_overflow_in_destination=false);
+
+ void dump(std::ostream& dst);
+ void flush (framepos_t start, framepos_t end);
+
+ void reset_tracker ();
+ void loop_resolve (MidiBuffer& dst, framepos_t);
- ChannelMode get_channel_mode() const {
- return static_cast<ChannelMode>((g_atomic_int_get(&_channel_mask) & 0xFFFF0000) >> 16);
- }
-
- uint16_t get_channel_mask() const {
- return static_cast<ChannelMode>((g_atomic_int_get(&_channel_mask) & 0x0000FFFF));
- }
-
-protected:
- inline bool is_channel_event(uint8_t event_type_byte) {
- // mask out channel information
- event_type_byte &= 0xF0;
- // midi channel events range from 0x80 to 0xE0
- return (0x80 <= event_type_byte) && (event_type_byte <= 0xE0);
- }
-
private:
- volatile uint32_t _channel_mask; // 16 bits mode, 16 bits mask
+ MidiStateTracker _tracker;
};
/** Read the time and size of an event. This call MUST be immediately proceeded
- * by a call to read_contents (or the read pointer will be garabage).
+ * by a call to read_contents (or the read pointer will be garbage).
*/
+template<typename T>
inline bool
-MidiRingBuffer::read_prefix(Evoral::EventTime* time, Evoral::EventType* type, uint32_t* size)
+MidiRingBuffer<T>::read_prefix(T* time, Evoral::EventType* type, uint32_t* size)
{
- bool success = Evoral::EventRingBuffer::full_read(sizeof(Evoral::EventTime), (uint8_t*)time);
- if (success)
- success = Evoral::EventRingBuffer::full_read(sizeof(Evoral::EventType), (uint8_t*)type);
- if (success)
- success = Evoral::EventRingBuffer::full_read(sizeof(uint32_t), (uint8_t*)size);
+ if (PBD::RingBufferNPT<uint8_t>::read((uint8_t*)time, sizeof(T)) != sizeof (T)) {
+ return false;
+ }
- return success;
-}
+ if (PBD::RingBufferNPT<uint8_t>::read((uint8_t*)type, sizeof(Evoral::EventType)) != sizeof (Evoral::EventType)) {
+ return false;
+ }
+ if (PBD::RingBufferNPT<uint8_t>::read((uint8_t*)size, sizeof(uint32_t)) != sizeof (uint32_t)) {
+ return false;
+ }
-/** Read the contenst of an event. This call MUST be immediately preceeded
- * by a call to read_prefix (or the returned even will be garabage).
- */
-inline bool
-MidiRingBuffer::read_contents(uint32_t size, uint8_t* buf)
-{
- return Evoral::EventRingBuffer::full_read(size, buf);
+ return true;
}
-/** Read a block of MIDI events from buffer.
- *
- * Timestamps of events returned are relative to start (ie event with stamp 0
- * occurred at start), with offset added.
+/** Read the content of an event. This call MUST be immediately preceded
+ * by a call to read_prefix (or the returned even will be garbage).
*/
-inline size_t
-MidiRingBuffer::read(MidiBuffer& dst, nframes_t start, nframes_t end, nframes_t offset)
+template<typename T>
+inline bool
+MidiRingBuffer<T>::read_contents(uint32_t size, uint8_t* buf)
{
- 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;
+ return PBD::RingBufferNPT<uint8_t>::read(buf, size) == size;
}
-
} // namespace ARDOUR
#endif // __ardour_midi_ring_buffer_h__
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