/[svn]/linuxsampler/trunk/src/engines/common/Event.cpp
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Diff of /linuxsampler/trunk/src/engines/common/Event.cpp

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revision 906 by schoenebeck, Sun Jul 23 16:44:08 2006 UTC revision 2871 by schoenebeck, Sun Apr 10 18:22:23 2016 UTC
# Line 3  Line 3 
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
6   *   Copyright (C) 2005, 2006 Christian Schoenebeck                        *   *   Copyright (C) 2005 - 2016 Christian Schoenebeck                       *
7   *                                                                         *   *                                                                         *
8   *   This program is free software; you can redistribute it and/or modify  *   *   This program is free software; you can redistribute it and/or modify  *
9   *   it under the terms of the GNU General Public License as published by  *   *   it under the terms of the GNU General Public License as published by  *
# Line 35  namespace LinuxSampler { Line 35  namespace LinuxSampler {
35          uiSampleRate       = SampleRate;          uiSampleRate       = SampleRate;
36          uiSamplesProcessed = 0;          uiSamplesProcessed = 0;
37          FragmentTime.end   = RTMath::CreateTimeStamp();          FragmentTime.end   = RTMath::CreateTimeStamp();
38            uiTotalSamplesProcessed = 0;
39      }      }
40    
41      /**      /**
# Line 46  namespace LinuxSampler { Line 47  namespace LinuxSampler {
47       *                           audio fragment cycle       *                           audio fragment cycle
48       */       */
49      void EventGenerator::UpdateFragmentTime(uint SamplesToProcess) {      void EventGenerator::UpdateFragmentTime(uint SamplesToProcess) {
50            // update total amount of sample points being processed since this object was created
51            uiTotalSamplesProcessed += uiSamplesProcessed;
52          // update time stamp for this audio fragment cycle          // update time stamp for this audio fragment cycle
53          FragmentTime.begin = FragmentTime.end;          FragmentTime.begin = FragmentTime.end;
54          FragmentTime.end   = RTMath::CreateTimeStamp();          FragmentTime.end   = RTMath::CreateTimeStamp();
# Line 55  namespace LinuxSampler { Line 58  namespace LinuxSampler {
58          // store amount of samples to process for the next cycle          // store amount of samples to process for the next cycle
59          uiSamplesProcessed = SamplesToProcess;          uiSamplesProcessed = SamplesToProcess;
60      }      }
61        
62        /**
63         * Get the next scheduled MIDI event (the one with the lowest time value)
64         * for the current audio fragment cycle and remove it from the queue. This
65         * method will not return any event scheduled past the current audio
66         * fragment boundary.
67         *
68         * @param queue - where the MIDI events are scheduled on
69         * @param pool - used to allocate and deallocate ScheduledEvent objects
70         * @param end - you @b MUST always pass EventGenerator::schedTimeAtCurrentFragmentEnd()
71         *              here reflecting the current audio fragment's scheduler end time
72         */
73        RTList<ScheduledEvent>::Iterator EventGenerator::popNextScheduledEvent(RTAVLTree<ScheduledEvent>& queue, Pool<ScheduledEvent>& pool, sched_time_t end) {
74            if (queue.isEmpty())
75                return RTList<ScheduledEvent>::Iterator(); // return invalid iterator
76            ScheduledEvent& e = queue.lowest();
77            if (e.scheduleTime >= end)
78                return RTList<ScheduledEvent>::Iterator(); // no event scheduled before 'end'
79            RTList<ScheduledEvent>::Iterator itEvent = pool.fromPtr(&e);
80            queue.erase(e);
81            if (!itEvent || !itEvent->itEvent) {
82                dmsg(1,("EventGenerator::popNextScheduledEvent(): !itEvent\n"));
83                return itEvent; // should never happen at this point, but just to be sure
84            }
85            if (!itEvent->itEvent) {
86                dmsg(1,("EventGenerator::popNextScheduledEvent(): !itEvent->itEvent\n"));
87                return itEvent; // should never happen at this point, but just to be sure
88            }
89    
90            // update position of this event in the current audio fragment
91            // (since calling scheduleAheadMicroSec() will relate to this)
92            itEvent->itEvent->iFragmentPos = uiSamplesProcessed - (end - itEvent->scheduleTime);
93            // safety first: fragment boundary sanity checks
94            if (itEvent->itEvent->iFragmentPos < 0)
95                itEvent->itEvent->iFragmentPos = 0;
96            if (itEvent->itEvent->iFragmentPos >= uiSamplesProcessed)
97                itEvent->itEvent->iFragmentPos = uiSamplesProcessed - 1;
98    
99            return itEvent;
100        }
101    
102        /**
103         * Get the next instrument script event (the one with the lowest time value)
104         * for the current audio fragment cycle and remove it from the queue. This
105         * method will not return any event scheduled past the current audio
106         * fragment boundary.
107         *
108         * @param queue - where the instrument script events are scheduled on
109         * @param pool - used to allocate and deallocate ScriptEvent objects
110         * @param end - you @b MUST always pass EventGenerator::schedTimeAtCurrentFragmentEnd()
111         *              here reflecting the current audio fragment's scheduler end time
112         */
113        RTList<ScriptEvent>::Iterator EventGenerator::popNextScheduledScriptEvent(RTAVLTree<ScriptEvent>& queue, Pool<ScriptEvent>& pool, sched_time_t end) {
114            if (queue.isEmpty())
115                return RTList<ScriptEvent>::Iterator(); // return invalid iterator
116            ScriptEvent& e = queue.lowest();
117            if (e.scheduleTime >= end)
118                return RTList<ScriptEvent>::Iterator(); // no event scheduled before 'end'
119            RTList<ScriptEvent>::Iterator itEvent = pool.fromPtr(&e);
120            queue.erase(e);
121            if (!itEvent) { // should never happen at this point, but just to be sure
122                dmsg(1,("EventGenerator::popNextScheduledScriptEvent(): !itEvent\n"));
123                return itEvent;
124            }
125    
126            // update position of this event in the current audio fragment
127            // (since calling scheduleAheadMicroSec() will relate to this)
128            itEvent->cause.iFragmentPos = uiSamplesProcessed - (end - itEvent->scheduleTime);
129            // safety first: fragment boundary sanity checks
130            if (itEvent->cause.iFragmentPos < 0)
131                itEvent->cause.iFragmentPos = 0;
132            if (itEvent->cause.iFragmentPos >= uiSamplesProcessed)
133                itEvent->cause.iFragmentPos = uiSamplesProcessed - 1;
134    
135            return itEvent;
136        }
137    
138      /**      /**
139       * Create a new event with the current time as time stamp.       * Create a new event with the current time as time stamp.
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