Jack2
1.9.8
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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 "JackEngineControl.h" 00021 #include "JackFrameTimer.h" 00022 #include "JackGlobals.h" 00023 #include "JackMidiUtil.h" 00024 #include "JackTime.h" 00025 00026 jack_midi_data_t 00027 Jack::ApplyRunningStatus(size_t *size, jack_midi_data_t **buffer, 00028 jack_midi_data_t running_status) 00029 { 00030 00031 // Stolen and modified from alsa/midi_pack.h 00032 00033 jack_midi_data_t status = **buffer; 00034 if ((status >= 0x80) && (status < 0xf0)) { 00035 if (status == running_status) { 00036 (*buffer)++; 00037 (*size)--; 00038 } else { 00039 running_status = status; 00040 } 00041 } else if (status < 0xf8) { 00042 running_status = 0; 00043 } 00044 return running_status; 00045 } 00046 00047 jack_midi_data_t 00048 Jack::ApplyRunningStatus(jack_midi_event_t *event, 00049 jack_midi_data_t running_status) 00050 { 00051 return ApplyRunningStatus(&(event->size), &(event->buffer), 00052 running_status); 00053 } 00054 00055 jack_nframes_t 00056 Jack::GetCurrentFrame() 00057 { 00058 jack_time_t time = GetMicroSeconds(); 00059 JackEngineControl *control = GetEngineControl(); 00060 JackTimer timer; 00061 control->ReadFrameTime(&timer); 00062 return timer.Time2Frames(time, control->fBufferSize); 00063 } 00064 00065 jack_nframes_t 00066 Jack::GetFramesFromTime(jack_time_t time) 00067 { 00068 JackEngineControl* control = GetEngineControl(); 00069 JackTimer timer; 00070 control->ReadFrameTime(&timer); 00071 return timer.Time2Frames(time, control->fBufferSize); 00072 } 00073 00074 jack_nframes_t 00075 Jack::GetLastFrame() 00076 { 00077 return GetEngineControl()->fFrameTimer.ReadCurrentState()->CurFrame(); 00078 } 00079 00080 int 00081 Jack::GetMessageLength(jack_midi_data_t status_byte) 00082 { 00083 switch (status_byte & 0xf0) { 00084 case 0x80: 00085 case 0x90: 00086 case 0xa0: 00087 case 0xb0: 00088 case 0xe0: 00089 return 3; 00090 case 0xc0: 00091 case 0xd0: 00092 return 2; 00093 case 0xf0: 00094 switch (status_byte) { 00095 case 0xf0: 00096 return 0; 00097 case 0xf1: 00098 case 0xf3: 00099 return 2; 00100 case 0xf2: 00101 return 3; 00102 case 0xf4: 00103 case 0xf5: 00104 case 0xf7: 00105 case 0xfd: 00106 break; 00107 default: 00108 return 1; 00109 } 00110 } 00111 return -1; 00112 } 00113 00114 jack_time_t 00115 Jack::GetTimeFromFrames(jack_nframes_t frames) 00116 { 00117 JackEngineControl* control = GetEngineControl(); 00118 JackTimer timer; 00119 control->ReadFrameTime(&timer); 00120 return timer.Frames2Time(frames, control->fBufferSize); 00121 }