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 00022 #include "JackFFADOMidiInputPort.h" 00023 #include "JackMidiUtil.h" 00024 #include "JackError.h" 00025 00026 using Jack::JackFFADOMidiInputPort; 00027 00028 JackFFADOMidiInputPort::JackFFADOMidiInputPort(size_t max_bytes) 00029 { 00030 event = 0; 00031 receive_queue = new JackFFADOMidiReceiveQueue(); 00032 std::auto_ptr<JackFFADOMidiReceiveQueue> receive_queue_ptr(receive_queue); 00033 write_queue = new JackMidiBufferWriteQueue(); 00034 std::auto_ptr<JackMidiBufferWriteQueue> write_queue_ptr(write_queue); 00035 raw_queue = new JackMidiRawInputWriteQueue(write_queue, max_bytes, 00036 max_bytes); 00037 write_queue_ptr.release(); 00038 receive_queue_ptr.release(); 00039 } 00040 00041 JackFFADOMidiInputPort::~JackFFADOMidiInputPort() 00042 { 00043 delete raw_queue; 00044 delete receive_queue; 00045 delete write_queue; 00046 } 00047 00048 void 00049 JackFFADOMidiInputPort::Process(JackMidiBuffer *port_buffer, 00050 uint32_t *input_buffer, jack_nframes_t frames) 00051 { 00052 receive_queue->ResetInputBuffer(input_buffer, frames); 00053 write_queue->ResetMidiBuffer(port_buffer, frames); 00054 jack_nframes_t boundary_frame = GetLastFrame() + frames; 00055 if (! event) { 00056 event = receive_queue->DequeueEvent(); 00057 } 00058 for (; event; event = receive_queue->DequeueEvent()) { 00059 switch (raw_queue->EnqueueEvent(event)) { 00060 case JackMidiWriteQueue::BUFFER_FULL: 00061 00062 // Processing events early might free up some space in the raw 00063 // input queue. 00064 00065 raw_queue->Process(boundary_frame); 00066 switch (raw_queue->EnqueueEvent(event)) { 00067 case JackMidiWriteQueue::BUFFER_TOO_SMALL: 00068 // This shouldn't really happen. It indicates a bug if it 00069 // does. 00070 jack_error("JackFFADOMidiInputPort::Process - **BUG** " 00071 "JackMidiRawInputWriteQueue::EnqueueEvent returned " 00072 "`BUFFER_FULL`, and then returned " 00073 "`BUFFER_TOO_SMALL` after a `Process()` call."); 00074 // Fallthrough on purpose 00075 case JackMidiWriteQueue::OK: 00076 continue; 00077 default: 00078 return; 00079 } 00080 case JackMidiWriteQueue::BUFFER_TOO_SMALL: 00081 jack_error("JackFFADOMidiInputPort::Process - The write queue " 00082 "couldn't enqueue a %d-byte event. Dropping event.", 00083 event->size); 00084 // Fallthrough on purpose 00085 case JackMidiWriteQueue::OK: 00086 continue; 00087 default: 00088 // This is here to stop compliers from warning us about not 00089 // handling enumeration values. 00090 ; 00091 } 00092 break; 00093 } 00094 raw_queue->Process(boundary_frame); 00095 }