add an AudioInjectionManager to handle multiple injections, link eve to it

eve/src/main.cpp

@@ -15,6 +15,7 @@
 #include <PacketHeaders.h>
 #include <AgentList.h>
 #include <AvatarData.h>
+#include <AudioInjectionManager.h>
 #include <AudioInjector.h>
 
 const int EVE_AGENT_LISTEN_PORT = 55441;
@@ -106,20 +107,19 @@ int main(int argc, const char* argv[]) {
     // put her hand out so somebody can shake it
     eve.setHandPosition(glm::vec3(eve.getPosition()[0] - 0.2,
                                   0.5,
-                                  eve.getPosition()[2] + 0.1));    
+                                  eve.getPosition()[2] + 0.1));
+    
+    // prepare the audio injection manager by giving it a handle to our agent socket
+    AudioInjectionManager::setInjectorSocket(agentList->getAgentSocket());
+    
     // read eve's audio data
     AudioInjector eveAudioInjector("/etc/highfidelity/eve/resources/eve.raw");
     
     // lower Eve's volume by setting the attentuation modifier (this is a value out of 255)
-    eveAudioInjector.setAttenuationModifier(190);
+    eveAudioInjector.setVolume(190);
-    
-    // pass the agentList UDPSocket pointer to the audio injector
-    eveAudioInjector.setInjectorSocket(agentList->getAgentSocket());
     
     // set the position of the audio injector
-    float injectorPosition[3];
+    eveAudioInjector.setPosition(eve.getPosition());
-    memcpy(injectorPosition, &eve.getPosition(), sizeof(injectorPosition));
-    eveAudioInjector.setPosition(injectorPosition);
     
     // register the callback for agent data creation
     agentList->linkedDataCreateCallback = createAvatarDataForAgent;
@@ -165,15 +165,11 @@ int main(int argc, const char* argv[]) {
                         Agent* audioMixer = AgentList::getInstance()->soloAgentOfType(AGENT_TYPE_AUDIO_MIXER);
                         
                         if (audioMixer) {
-                            // until the audio mixer is setup for ping-reply, activate the public socket if it's not active
+                            // update the destination socket for the AIM, in case the mixer has changed
-                            if (!audioMixer->getActiveSocket()) {
+                            AudioInjectionManager::setDestinationSocket(*audioMixer->getPublicSocket());
-                                audioMixer->activatePublicSocket();
-                            }
-                            
-                            eveAudioInjector.setDestinationSocket(audioMixer->getActiveSocket());
                             
                             // we have an active audio mixer we can send data to
-                            eveAudioInjector.threadInjectionOfAudio();
+                            AudioInjectionManager::threadInjector(&eveAudioInjector);
                         }
                     }
                 }            

libraries/shared/src/AudioInjectionManager.cpp

@@ -0,0 +1,106 @@
+//
+//  AudioInjectionManager.cpp
+//  hifi
+//
+//  Created by Stephen Birarda on 5/16/13.
+//  Copyright (c) 2012 High Fidelity, Inc. All rights reserved.
+//
+
+#include <sys/time.h>
+
+#include "SharedUtil.h"
+#include "PacketHeaders.h"
+
+#include "AudioInjectionManager.h"
+
+UDPSocket* AudioInjectionManager::_injectorSocket = NULL;
+sockaddr AudioInjectionManager::_destinationSocket;
+AudioInjector* AudioInjectionManager::_injectors[50] = {};
+
+AudioInjector* AudioInjectionManager::injectorWithSamplesFromFile(const char* filename) {
+    for (int i = 0; i < MAX_CONCURRENT_INJECTORS; i++) {
+        if (!_injectors[i]) {
+            _injectors[i] = new AudioInjector(filename);
+            return _injectors[i];
+        }
+    }
+    
+    return NULL;
+}
+
+AudioInjector* AudioInjectionManager::injectorWithCapacity(int capacity) {
+    for (int i = 0; i < MAX_CONCURRENT_INJECTORS; i++) {
+        if (!_injectors[i]) {
+            _injectors[i] = new AudioInjector(capacity);
+            return _injectors[i];
+        }
+    }
+    
+    return NULL;
+}
+
+void* AudioInjectionManager::injectAudioViaThread(void* args) {
+    AudioInjector* injector = (AudioInjector*) args;
+    
+    if (injector->_audioSampleArray) {
+        injector->setIsInjectingAudio(true);
+        
+        timeval startTime;
+        
+        // one byte for header, 3 positional floats, 1 bearing float, 1 attenuation modifier byte
+        int leadingBytes = 1 + (sizeof(float) * 4) + 1;
+        unsigned char dataPacket[BUFFER_LENGTH_BYTES + leadingBytes];
+        
+        dataPacket[0] = PACKET_HEADER_INJECT_AUDIO;
+        unsigned char *currentPacketPtr = dataPacket + 1;
+        
+        memcpy(currentPacketPtr, &injector->getPosition(), sizeof(injector->getPosition()));
+        currentPacketPtr += sizeof(injector->getPosition());
+        
+        *currentPacketPtr = injector->getVolume();
+        currentPacketPtr++;
+        
+        memcpy(currentPacketPtr, &injector->_bearing, sizeof(injector->_bearing));
+        currentPacketPtr += sizeof(injector->_bearing);
+        
+        for (int i = 0; i < injector->_numTotalSamples; i += BUFFER_LENGTH_SAMPLES) {
+            gettimeofday(&startTime, NULL);
+            
+            int numSamplesToCopy = BUFFER_LENGTH_SAMPLES;
+            
+            if (injector->_numTotalSamples - i < BUFFER_LENGTH_SAMPLES) {
+                numSamplesToCopy = injector->_numTotalSamples - i;
+                memset(currentPacketPtr + numSamplesToCopy, 0, BUFFER_LENGTH_BYTES - (numSamplesToCopy * sizeof(int16_t)));
+            }
+            
+            memcpy(currentPacketPtr, injector->_audioSampleArray + i, numSamplesToCopy * sizeof(int16_t));
+            
+            _injectorSocket->send(&_destinationSocket, dataPacket, sizeof(dataPacket));
+            
+            double usecToSleep = BUFFER_SEND_INTERVAL_USECS - (usecTimestampNow() - usecTimestamp(&startTime));
+            if (usecToSleep > 0) {
+                usleep(usecToSleep);
+            }
+        }
+        
+        injector->_isInjectingAudio = false;
+    }
+    
+    // if this an injector inside the injection manager's array we're responsible for deletion
+    for (int i = 0; i < MAX_CONCURRENT_INJECTORS; i++) {
+        if (_injectors[i] == injector) {
+            // pointer matched - delete this injector
+            delete injector;
+            
+            // set the pointer to NULL so we can reuse this spot
+            _injectors[i] = NULL;
+        }
+    }
+    
+    pthread_exit(0);
+}
+
+void AudioInjectionManager::threadInjector(AudioInjector* injector) {
+    pthread_t audioInjectThread;
+    pthread_create(&audioInjectThread, NULL, injectAudioViaThread, (void*) injector);
+}

libraries/shared/src/AudioInjectionManager.h

@@ -0,0 +1,36 @@
+//
+//  AudioInjectionManager.h
+//  hifi
+//
+//  Created by Stephen Birarda on 5/16/13.
+//  Copyright (c) 2012 High Fidelity, Inc. All rights reserved.
+//
+
+#ifndef __hifi__AudioInjectionManager__
+#define __hifi__AudioInjectionManager__
+
+#include <iostream>
+
+#include "UDPSocket.h"
+#include "AudioInjector.h"
+
+const int MAX_CONCURRENT_INJECTORS = 50;
+
+class AudioInjectionManager {
+public:
+    static AudioInjector* injectorWithCapacity(int capacity);
+    static AudioInjector* injectorWithSamplesFromFile(const char* filename);
+    
+    static void threadInjector(AudioInjector* injector);
+    
+    static void setInjectorSocket(UDPSocket* injectorSocket) { _injectorSocket = injectorSocket;}
+    static void setDestinationSocket(sockaddr& destinationSocket) { _destinationSocket = destinationSocket; }
+private:
+    static void* injectAudioViaThread(void* args);
+    
+    static UDPSocket* _injectorSocket;
+    static sockaddr _destinationSocket;
+    static AudioInjector* _injectors[MAX_CONCURRENT_INJECTORS];
+};
+
+#endif /* defined(__hifi__AudioInjectionManager__) */

libraries/shared/src/AudioInjector.cpp

@@ -3,27 +3,20 @@
 //  hifi
 //
 //  Created by Stephen Birarda on 4/23/13.
-//
+//  Copyright (c) 2012 High Fidelity, Inc. All rights reserved.
 //
 
-#include <sys/time.h>
 #include <fstream>
 #include <cstring>
 
 #include "SharedUtil.h"
-#include "PacketHeaders.h"
 
 #include "AudioInjector.h"
 
-const int BUFFER_LENGTH_BYTES = 512;
-const int BUFFER_LENGTH_SAMPLES = BUFFER_LENGTH_BYTES / sizeof(int16_t);
-const float SAMPLE_RATE = 22050.0f;
-const float BUFFER_SEND_INTERVAL_USECS = (BUFFER_LENGTH_SAMPLES / SAMPLE_RATE) * 1000000;
-
 AudioInjector::AudioInjector(const char* filename) :
     _position(),
     _bearing(0),
-    _attenuationModifier(255),
+    _volume(0xFF),
     _indexOfNextSlot(0),
     _isInjectingAudio(false)
 {
@@ -50,7 +43,7 @@ AudioInjector::AudioInjector(int maxNumSamples) :
     _numTotalSamples(maxNumSamples),
     _position(),
     _bearing(0),
-    _attenuationModifier(255),
+    _volume(0xFF),
     _indexOfNextSlot(0),
     _isInjectingAudio(false)
 {
@@ -62,12 +55,6 @@ AudioInjector::~AudioInjector() {
     delete[] _audioSampleArray;
 }
 
-void AudioInjector::setPosition(float* position) {
-    _position[0] = position[0];
-    _position[1] = position[1];
-    _position[2] = position[2];
-}
-
 void AudioInjector::addSample(const int16_t sample) {
     if (_indexOfNextSlot != _numTotalSamples) {
         // only add this sample if we actually have space for it
@@ -82,63 +69,3 @@ void AudioInjector::addSamples(int16_t* sampleBuffer, int numSamples) {
         _indexOfNextSlot += numSamples;
     }
 }
-
-void AudioInjector::injectAudio() {
-    if (_audioSampleArray) {
-        _isInjectingAudio = true;
-        
-        timeval startTime;
-        
-        // one byte for header, 3 positional floats, 1 bearing float, 1 attenuation modifier byte
-        int leadingBytes = 1 + (sizeof(float) * 4) + 1;
-        unsigned char dataPacket[BUFFER_LENGTH_BYTES + leadingBytes];
-        
-        dataPacket[0] = PACKET_HEADER_INJECT_AUDIO;
-        unsigned char *currentPacketPtr = dataPacket + 1;
-        
-        for (int i = 0; i < 3; i++) {
-            memcpy(currentPacketPtr, &_position[i], sizeof(float));
-            currentPacketPtr += sizeof(float);
-        }
-        
-        *currentPacketPtr = _attenuationModifier;
-        currentPacketPtr++;
-        
-        memcpy(currentPacketPtr, &_bearing, sizeof(float));
-        currentPacketPtr += sizeof(float);
-        
-        for (int i = 0; i < _numTotalSamples; i += BUFFER_LENGTH_SAMPLES) {
-            gettimeofday(&startTime, NULL);
-            
-            int numSamplesToCopy = BUFFER_LENGTH_SAMPLES;
-            
-            if (_numTotalSamples - i < BUFFER_LENGTH_SAMPLES) {
-                numSamplesToCopy = _numTotalSamples - i;
-                memset(currentPacketPtr + numSamplesToCopy, 0, BUFFER_LENGTH_BYTES - (numSamplesToCopy * sizeof(int16_t)));
-            }
-            
-            memcpy(currentPacketPtr, _audioSampleArray + i, numSamplesToCopy * sizeof(int16_t));
-            
-            _injectorSocket->send(&_destinationSocket, dataPacket, sizeof(dataPacket));
-            
-            double usecToSleep = BUFFER_SEND_INTERVAL_USECS - (usecTimestampNow() - usecTimestamp(&startTime));
-            if (usecToSleep > 0) {
-                usleep(usecToSleep);
-            }
-        }
-        
-        _isInjectingAudio = false;
-    }
-}
-
-void* injectAudioViaThread(void* args) {
-    AudioInjector* parentInjector = (AudioInjector*) args;
-    parentInjector->injectAudio();
-    
-    pthread_exit(0);
-}
-
-void AudioInjector::threadInjectionOfAudio() {
-    pthread_t audioInjectThread;
-    pthread_create(&audioInjectThread, NULL, injectAudioViaThread, (void*) this);
-}

libraries/shared/src/AudioInjector.h

@@ -3,45 +3,50 @@
 //  hifi
 //
 //  Created by Stephen Birarda on 4/23/13.
-//
+//  Copyright (c) 2012 High Fidelity, Inc. All rights reserved.
 //
 
 #ifndef __hifi__AudioInjector__
 #define __hifi__AudioInjector__
 
 #include <iostream>
-#include <netinet/in.h>
 
-#include "UDPSocket.h"
+#include <glm/glm.hpp>
+
+const int BUFFER_LENGTH_BYTES = 512;
+const int BUFFER_LENGTH_SAMPLES = BUFFER_LENGTH_BYTES / sizeof(int16_t);
+const float SAMPLE_RATE = 22050.0f;
+const float BUFFER_SEND_INTERVAL_USECS = (BUFFER_LENGTH_SAMPLES / SAMPLE_RATE) * 1000000;
 
 class AudioInjector {
+    friend class AudioInjectionManager;
+    
 public:
     AudioInjector(const char* filename);
     AudioInjector(int maxNumSamples);
     ~AudioInjector();
     
     bool isInjectingAudio() const { return _isInjectingAudio; }
+    void setIsInjectingAudio(bool isInjectingAudio) { _isInjectingAudio = isInjectingAudio; }
     
-    void setPosition(float* position);
+    unsigned char getVolume() const  { return _volume; }
+    void setVolume(unsigned char volume) { _volume = volume; }
+    
+    const glm::vec3& getPosition() const { return _position; }
+    void setPosition(const glm::vec3& position) { _position = position; }
+    
+    float getBearing() const { return _bearing; }
     void setBearing(float bearing) { _bearing = bearing; }
-    void setAttenuationModifier(unsigned char attenuationModifier) { _attenuationModifier = attenuationModifier; }
-    void setInjectorSocket(UDPSocket* injectorSocket) { _injectorSocket = injectorSocket; }
-    void setDestinationSocket(sockaddr* destinationSocket) { _destinationSocket = *destinationSocket; }
     
     void addSample(const int16_t sample);
     void addSamples(int16_t* sampleBuffer, int numSamples);
-    
-    void injectAudio();
-    void threadInjectionOfAudio();
 private:
     int16_t* _audioSampleArray;
     int _numTotalSamples;
-    float _position[3];
+    glm::vec3 _position;
     float _bearing;
-    unsigned char _attenuationModifier;
+    unsigned char _volume;
     int _indexOfNextSlot;
-    UDPSocket* _injectorSocket;
-    sockaddr _destinationSocket;
     bool _isInjectingAudio;
 };