Jack2
1.9.10
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00001 /* 00002 Copyright (C) 2010 Devin Anderson 00003 00004 This program is free software; you can redistribute it and/or modify 00005 it under the terms of the GNU Lesser General Public License as published by 00006 the Free Software Foundation; either version 2.1 of the License, or 00007 (at your option) any later version. 00008 00009 This program is distributed in the hope that it will be useful, 00010 but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 GNU Lesser General Public License for more details. 00013 00014 You should have received a copy of the GNU Lesser General Public License 00015 along with this program; if not, write to the Free Software 00016 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 00017 00018 */ 00019 00020 #include <memory> 00021 #include <new> 00022 00023 #include "JackError.h" 00024 #include "JackMidiRawOutputWriteQueue.h" 00025 #include "JackMidiUtil.h" 00026 00027 using Jack::JackMidiRawOutputWriteQueue; 00028 00029 #define STILL_TIME(c, b) ((! (b)) || ((c) < (b))) 00030 00031 JackMidiRawOutputWriteQueue:: 00032 JackMidiRawOutputWriteQueue(JackMidiSendQueue *send_queue, size_t non_rt_size, 00033 size_t max_non_rt_messages, size_t max_rt_messages) 00034 { 00035 non_rt_queue = new JackMidiAsyncQueue(non_rt_size, max_non_rt_messages); 00036 std::auto_ptr<JackMidiAsyncQueue> non_rt_ptr(non_rt_queue); 00037 rt_queue = new JackMidiAsyncQueue(max_rt_messages, max_rt_messages); 00038 std::auto_ptr<JackMidiAsyncQueue> rt_ptr(rt_queue); 00039 non_rt_event = 0; 00040 rt_event = 0; 00041 running_status = 0; 00042 this->send_queue = send_queue; 00043 rt_ptr.release(); 00044 non_rt_ptr.release(); 00045 } 00046 00047 JackMidiRawOutputWriteQueue::~JackMidiRawOutputWriteQueue() 00048 { 00049 delete non_rt_queue; 00050 delete rt_queue; 00051 } 00052 00053 void 00054 JackMidiRawOutputWriteQueue::DequeueNonRealtimeEvent() 00055 { 00056 non_rt_event = non_rt_queue->DequeueEvent(); 00057 if (non_rt_event) { 00058 non_rt_event_time = non_rt_event->time; 00059 running_status = ApplyRunningStatus(non_rt_event, running_status); 00060 } 00061 } 00062 00063 void 00064 JackMidiRawOutputWriteQueue::DequeueRealtimeEvent() 00065 { 00066 rt_event = rt_queue->DequeueEvent(); 00067 if (rt_event) { 00068 rt_event_time = rt_event->time; 00069 } 00070 } 00071 00072 Jack::JackMidiWriteQueue::EnqueueResult 00073 JackMidiRawOutputWriteQueue::EnqueueEvent(jack_nframes_t time, size_t size, 00074 jack_midi_data_t *buffer) 00075 { 00076 JackMidiAsyncQueue *queue = (size == 1) && (*buffer >= 0xf8) ? rt_queue : 00077 non_rt_queue; 00078 return queue->EnqueueEvent(time, size, buffer); 00079 } 00080 00081 void 00082 JackMidiRawOutputWriteQueue::HandleWriteQueueBug(jack_nframes_t time, 00083 jack_midi_data_t byte) 00084 { 00085 jack_error("JackMidiRawOutputWriteQueue::HandleWriteQueueBug - **BUG** " 00086 "The write queue told us that it couldn't enqueue a 1-byte " 00087 "MIDI event scheduled for frame '%d'. This is probably a bug " 00088 "in the write queue implementation.", time); 00089 } 00090 00091 jack_nframes_t 00092 JackMidiRawOutputWriteQueue::Process(jack_nframes_t boundary_frame) 00093 { 00094 if (! non_rt_event) { 00095 DequeueNonRealtimeEvent(); 00096 } 00097 if (! rt_event) { 00098 DequeueRealtimeEvent(); 00099 } 00100 while (rt_event) { 00101 jack_nframes_t current_frame = send_queue->GetNextScheduleFrame(); 00102 if ((rt_event_time > current_frame) && non_rt_event && 00103 (non_rt_event_time < rt_event_time)) { 00104 if (! SendNonRTBytes(rt_event_time < boundary_frame ? 00105 rt_event_time : boundary_frame)) { 00106 return non_rt_event_time; 00107 } 00108 current_frame = send_queue->GetNextScheduleFrame(); 00109 } 00110 if (! STILL_TIME(current_frame, boundary_frame)) { 00111 return (! non_rt_event) ? rt_event_time : 00112 non_rt_event_time < rt_event_time ? non_rt_event_time : 00113 rt_event_time; 00114 } 00115 if (! SendByte(rt_event_time, *(rt_event->buffer))) { 00116 return rt_event_time; 00117 } 00118 DequeueRealtimeEvent(); 00119 } 00120 SendNonRTBytes(boundary_frame); 00121 return non_rt_event ? non_rt_event_time : 0; 00122 } 00123 00124 bool 00125 JackMidiRawOutputWriteQueue::SendByte(jack_nframes_t time, 00126 jack_midi_data_t byte) 00127 { 00128 switch (send_queue->EnqueueEvent(time, 1, &byte)) { 00129 case BUFFER_TOO_SMALL: 00130 HandleWriteQueueBug(time, byte); 00131 case OK: 00132 return true; 00133 default: 00134 // This is here to stop compilers from warning us about not handling 00135 // enumeration values. 00136 ; 00137 } 00138 return false; 00139 } 00140 00141 bool 00142 JackMidiRawOutputWriteQueue::SendNonRTBytes(jack_nframes_t boundary_frame) 00143 { 00144 while (non_rt_event) { 00145 for (; non_rt_event->size; 00146 (non_rt_event->size)--, (non_rt_event->buffer)++) { 00147 jack_nframes_t current_frame = send_queue->GetNextScheduleFrame(); 00148 if (! STILL_TIME(current_frame, boundary_frame)) { 00149 return true; 00150 } 00151 if (! SendByte(non_rt_event_time, *(non_rt_event->buffer))) { 00152 return false; 00153 } 00154 } 00155 DequeueNonRealtimeEvent(); 00156 } 00157 return true; 00158 }