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/*
Copyright (C) 2010 Devin Anderson
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <memory>
#include <new>
#include "JackError.h"
#include "JackMidiRawOutputWriteQueue.h"
#include "JackMidiUtil.h"
using Jack::JackMidiRawOutputWriteQueue;
#define STILL_TIME(c, b) ((! (b)) || ((c) < (b)))
JackMidiRawOutputWriteQueue::
JackMidiRawOutputWriteQueue(JackMidiSendQueue *send_queue, size_t non_rt_size,
size_t max_non_rt_messages, size_t max_rt_messages)
{
non_rt_queue = new JackMidiAsyncQueue(non_rt_size, max_non_rt_messages);
std::auto_ptr<JackMidiAsyncQueue> non_rt_ptr(non_rt_queue);
rt_queue = new JackMidiAsyncQueue(max_rt_messages, max_rt_messages);
std::auto_ptr<JackMidiAsyncQueue> rt_ptr(rt_queue);
non_rt_event = 0;
rt_event = 0;
running_status = 0;
this->send_queue = send_queue;
rt_ptr.release();
non_rt_ptr.release();
}
JackMidiRawOutputWriteQueue::~JackMidiRawOutputWriteQueue()
{
delete non_rt_queue;
delete rt_queue;
}
void
JackMidiRawOutputWriteQueue::DequeueNonRealtimeEvent()
{
non_rt_event = non_rt_queue->DequeueEvent();
if (non_rt_event) {
non_rt_event_time = non_rt_event->time;
running_status = ApplyRunningStatus(non_rt_event, running_status);
}
}
void
JackMidiRawOutputWriteQueue::DequeueRealtimeEvent()
{
rt_event = rt_queue->DequeueEvent();
if (rt_event) {
rt_event_time = rt_event->time;
}
}
Jack::JackMidiWriteQueue::EnqueueResult
JackMidiRawOutputWriteQueue::EnqueueEvent(jack_nframes_t time, size_t size,
jack_midi_data_t *buffer)
{
JackMidiAsyncQueue *queue = (size == 1) && (*buffer >= 0xf8) ? rt_queue :
non_rt_queue;
return queue->EnqueueEvent(time, size, buffer);
}
void
JackMidiRawOutputWriteQueue::HandleWriteQueueBug(jack_nframes_t time,
jack_midi_data_t byte)
{
jack_error("JackMidiRawOutputWriteQueue::HandleWriteQueueBug - **BUG** "
"The write queue told us that it couldn't enqueue a 1-byte "
"MIDI event scheduled for frame '%d'. This is probably a bug "
"in the write queue implementation.", time);
}
jack_nframes_t
JackMidiRawOutputWriteQueue::Process(jack_nframes_t boundary_frame)
{
if (! non_rt_event) {
DequeueNonRealtimeEvent();
}
if (! rt_event) {
DequeueRealtimeEvent();
}
while (rt_event) {
jack_nframes_t current_frame = send_queue->GetNextScheduleFrame();
if ((rt_event_time > current_frame) && non_rt_event &&
(non_rt_event_time < rt_event_time)) {
if (! SendNonRTBytes(rt_event_time < boundary_frame ?
rt_event_time : boundary_frame)) {
return non_rt_event_time;
}
current_frame = send_queue->GetNextScheduleFrame();
}
if (! STILL_TIME(current_frame, boundary_frame)) {
return (! non_rt_event) ? rt_event_time :
non_rt_event_time < rt_event_time ? non_rt_event_time :
rt_event_time;
}
if (! SendByte(rt_event_time, *(rt_event->buffer))) {
return rt_event_time;
}
DequeueRealtimeEvent();
}
SendNonRTBytes(boundary_frame);
return non_rt_event ? non_rt_event_time : 0;
}
bool
JackMidiRawOutputWriteQueue::SendByte(jack_nframes_t time,
jack_midi_data_t byte)
{
switch (send_queue->EnqueueEvent(time, 1, &byte)) {
case BUFFER_TOO_SMALL:
HandleWriteQueueBug(time, byte);
case OK:
return true;
default:
// This is here to stop compilers from warning us about not handling
// enumeration values.
;
}
return false;
}
bool
JackMidiRawOutputWriteQueue::SendNonRTBytes(jack_nframes_t boundary_frame)
{
while (non_rt_event) {
for (; non_rt_event->size;
(non_rt_event->size)--, (non_rt_event->buffer)++) {
jack_nframes_t current_frame = send_queue->GetNextScheduleFrame();
if (! STILL_TIME(current_frame, boundary_frame)) {
return true;
}
if (! SendByte(non_rt_event_time, *(non_rt_event->buffer))) {
return false;
}
}
DequeueNonRealtimeEvent();
}
return true;
}
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