andrewm@11: /*
andrewm@11:   TouchKeys: multi-touch musical keyboard control software
andrewm@11:   Copyright (c) 2013 Andrew McPherson
andrewm@11: 
andrewm@11:   This program is free software: you can redistribute it and/or modify
andrewm@11:   it under the terms of the GNU General Public License as published by
andrewm@11:   the Free Software Foundation, either version 3 of the License, or
andrewm@11:   (at your option) any later version.
andrewm@11:  
andrewm@11:   This program is distributed in the hope that it will be useful,
andrewm@11:   but WITHOUT ANY WARRANTY; without even the implied warranty of
andrewm@11:   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
andrewm@11:   GNU General Public License for more details.
andrewm@11: 
andrewm@11:   You should have received a copy of the GNU General Public License
andrewm@11:   along with this program.  If not, see <http://www.gnu.org/licenses/>.
andrewm@11:  
andrewm@11:   =====================================================================
andrewm@11:  
andrewm@11:   TouchkeyEntropyGenerator.cpp: generate random TouchKeys data for testing
andrewm@11: */
andrewm@11: 
andrewm@11: #include "TouchkeyEntropyGenerator.h"
andrewm@13: #include <cstdlib>
andrewm@11: 
andrewm@11: TouchkeyEntropyGenerator::TouchkeyEntropyGenerator(PianoKeyboard& keyboard)
andrewm@11: : Thread("TouchkeyEntropyGenerator"), keyboard_(keyboard),
andrewm@11:   waitableEvent_(true), isRunning_(false),
andrewm@11:   keyboardRangeLow_(36), keyboardRangeHigh_(60),
andrewm@11:   dataInterval_(milliseconds_to_timestamp(5.0))
andrewm@11: {
andrewm@13:     srand(time(NULL));
andrewm@11: }
andrewm@11: 
andrewm@11: // Start the thread handling the scheduling.
andrewm@11: void TouchkeyEntropyGenerator::start() {
andrewm@11: 	if(isRunning_)
andrewm@11: 		return;
andrewm@11:     // Initialize the touch data before starting
andrewm@11:     for(int i = 0; i <= 127; i++) {
andrewm@11:         clearTouchData(i);
andrewm@11:         nextOnOffFrameCount_[i] = abs(rand()) % 8192;
andrewm@11:     }
andrewm@11:     isRunning_ = true;
andrewm@11:     startThread();
andrewm@11: }
andrewm@11: 
andrewm@11: // Stop the scheduler thread if it is currently running.
andrewm@11: void TouchkeyEntropyGenerator::stop() {
andrewm@11: 	if(!isRunning_)
andrewm@11: 		return;
andrewm@11:     
andrewm@11:     // Tell the thread to quit and signal the event it waits on
andrewm@11:     signalThreadShouldExit();
andrewm@11:     stopThread(-1);
andrewm@11:     
andrewm@11: 	isRunning_ = false;
andrewm@11: }
andrewm@11: 
andrewm@11: // Run the entropy generator in its own thread
andrewm@11: void TouchkeyEntropyGenerator::run() {
andrewm@11:     timestamp_type lastDataTime = keyboard_.schedulerCurrentTimestamp();
andrewm@11:     timestamp_type currentTime;
andrewm@11:     
andrewm@11:     while(!threadShouldExit()) {
andrewm@11:         // Generate random data at regular intervals
andrewm@11:         currentTime = keyboard_.schedulerCurrentTimestamp();
andrewm@11:         while(currentTime - lastDataTime < dataInterval_ && !threadShouldExit()) {
andrewm@11:             waitableEvent_.wait(1);
andrewm@11:             currentTime = keyboard_.schedulerCurrentTimestamp();
andrewm@11:         }
andrewm@11:         
andrewm@11:         for(int i = keyboardRangeLow_; i <= keyboardRangeHigh_; i++) {
andrewm@11:             if(touchFrames_[i].count != 0) {
andrewm@11:                 // This key is on. Check if it should go off; otherwise generate new data
andrewm@11:                 if(--nextOnOffFrameCount_[i] <= 0) {
andrewm@11:                     clearTouchData(i);
andrewm@11:                     if(keyboard_.key(i) != 0)
andrewm@11:                         keyboard_.key(i)->touchOff(currentTime);
andrewm@11:                     nextOnOffFrameCount_[i] = abs(rand()) % 8192;
andrewm@11:                 }
andrewm@11:                 else {
andrewm@11:                     generateRandomFrame(i);
andrewm@11:                     if(keyboard_.key(i) != 0) {
andrewm@11:                         KeyTouchFrame copyFrame(touchFrames_[i]);
andrewm@11:                         keyboard_.key(i)->touchInsertFrame(copyFrame, currentTime);
andrewm@11:                     }
andrewm@11:                 }
andrewm@11:             }
andrewm@11:             else {
andrewm@11:                 // This key is off. Check if it should go on
andrewm@11:                 if(--nextOnOffFrameCount_[i] <= 0) {
andrewm@11:                     generateRandomFrame(i);
andrewm@11:                     if(keyboard_.key(i) != 0) {
andrewm@11:                         KeyTouchFrame copyFrame(touchFrames_[i]);
andrewm@11:                         keyboard_.key(i)->touchInsertFrame(copyFrame, currentTime);
andrewm@11:                     }
andrewm@11:                     nextOnOffFrameCount_[i] = abs(rand()) % 8192;
andrewm@11:                 }
andrewm@11:             }
andrewm@11:         }
andrewm@11:     }
andrewm@11:     
andrewm@11:     // Tell all currently enabled notes to turn off
andrewm@11:     for(int i = 0; i < 128; i++) {
andrewm@11:         if(touchFrames_[i].count > 0 && keyboard_.key(i) != 0)
andrewm@11:             keyboard_.key(i)->touchOff(currentTime);
andrewm@11:     }
andrewm@11: }
andrewm@11: 
andrewm@11: // Clear touch data for a particular key
andrewm@11: void TouchkeyEntropyGenerator::clearTouchData(int i) {
andrewm@11:     touchFrames_[i].count = 0;
andrewm@11:     touchFrames_[i].locH = -1.0;
andrewm@11:     touchFrames_[i].nextId = 0;
andrewm@11:     for(int j = 0; j < 3; j++) {
andrewm@11:         touchFrames_[i].ids[j] = -1;
andrewm@11:         touchFrames_[i].locs[j] = -1.0;
andrewm@11:         touchFrames_[i].sizes[j] = 0;
andrewm@11:     }
andrewm@11:     int key = i % 12;
andrewm@11:     if(key == 1 || key == 3 || key == 6 || key == 8 || key == 10)
andrewm@11:         touchFrames_[i].white = false;
andrewm@11:     else
andrewm@11:         touchFrames_[i].white = true;
andrewm@11: }
andrewm@11: 
andrewm@11: // Generate a random frame of touch data on this key
andrewm@11: void TouchkeyEntropyGenerator::generateRandomFrame(int key) {
andrewm@11:     touchFrames_[key].count = 1;
andrewm@11:     touchFrames_[key].locH = (float)abs(rand()) / (float)RAND_MAX;
andrewm@11:     touchFrames_[key].locs[0] = (float)abs(rand()) / (float)RAND_MAX;
andrewm@11:     touchFrames_[key].sizes[0] = (float)abs(rand()) / (float)RAND_MAX;
andrewm@11: }