audio API changes to allow multiple injections of single sound

libraries/audio/src/AudioInjector.cpp

@@ -2,16 +2,10 @@
 //  AudioInjector.cpp
 //  hifi
 //
-//  Created by Stephen Birarda on 12/19/2013.
+//  Created by Stephen Birarda on 1/2/2014.
 //  Copyright (c) 2013 HighFidelity, Inc. All rights reserved.
 //
 
-#include <sys/time.h>
-
-#include <QtNetwork/QNetworkAccessManager>
-#include <QtNetwork/QNetworkReply>
-#include <QtNetwork/QNetworkRequest>
-
 #include <NodeList.h>
 #include <PacketHeaders.h>
 #include <SharedUtil.h>
@@ -24,13 +18,12 @@
 
 int abstractAudioPointerMeta = qRegisterMetaType<AbstractAudioInterface*>("AbstractAudioInterface*");
 
-AudioInjector::AudioInjector(const QUrl& sampleURL) :
-    _currentSendPosition(0),
-    _sourceURL(sampleURL),
-	_position(0,0,0),
-    _orientation(),
+AudioInjector::AudioInjector(Sound* sound) :
+    _sound(sound),
     _volume(1.0f),
-    _shouldLoopback(true)
+    _shouldLoopback(true),
+    _position(0.0f, 0.0f, 0.0f),
+    _orientation()
 {
     // we want to live on our own thread
     moveToThread(&_thread);
@@ -38,45 +31,30 @@ AudioInjector::AudioInjector(const QUrl& sampleURL) :
     _thread.start();
 }
 
-void AudioInjector::startDownload() {
-    // assume we have a QApplication or QCoreApplication instance and use the
-    // QNetworkAccess manager to grab the raw audio file at the given URL
-    
-    QNetworkAccessManager *manager = new QNetworkAccessManager(this);
-    connect(manager, SIGNAL(finished(QNetworkReply*)),
-            this, SLOT(replyFinished(QNetworkReply*)));
-    
-    manager->get(QNetworkRequest(_sourceURL));
-}
-
-void AudioInjector::replyFinished(QNetworkReply* reply) {
-    // replace our samples array with the downloaded data
-    _sampleByteArray = reply->readAll();
-}
-
 void AudioInjector::injectViaThread(AbstractAudioInterface* localAudioInterface) {
     // use Qt::AutoConnection so that this is called on our thread, if appropriate
     QMetaObject::invokeMethod(this, "injectAudio", Qt::AutoConnection, Q_ARG(AbstractAudioInterface*, localAudioInterface));
 }
 
+const uchar MAX_INJECTOR_VOLUME = 0xFF;
+
 void AudioInjector::injectAudio(AbstractAudioInterface* localAudioInterface) {
     
+    QByteArray soundByteArray = _sound->getByteArray();
+    
     // make sure we actually have samples downloaded to inject
-    if (_sampleByteArray.size()) {
+    if (soundByteArray.size()) {
         // give our sample byte array to the local audio interface, if we have it, so it can be handled locally
         if (localAudioInterface) {
             // assume that localAudioInterface could be on a separate thread, use Qt::AutoConnection to handle properly
             QMetaObject::invokeMethod(localAudioInterface, "handleAudioByteArray",
                                       Qt::AutoConnection,
-                                      Q_ARG(QByteArray, _sampleByteArray));
+                                      Q_ARG(QByteArray, soundByteArray));
             
         }
         
         NodeList* nodeList = NodeList::getInstance();
         
-        // reset the current send position to the beginning
-        _currentSendPosition = 0;
-        
         // setup the packet for injected audio
         unsigned char injectedAudioPacket[MAX_PACKET_SIZE];
         unsigned char* currentPacketPosition = injectedAudioPacket;
@@ -121,14 +99,16 @@ void AudioInjector::injectAudio(AbstractAudioInterface* localAudioInterface) {
         gettimeofday(&startTime, NULL);
         int nextFrame = 0;
         
+        int currentSendPosition = 0;
+        
         // loop to send off our audio in NETWORK_BUFFER_LENGTH_SAMPLES_PER_CHANNEL byte chunks
-        while (_currentSendPosition < _sampleByteArray.size()) {
+        while (currentSendPosition < soundByteArray.size()) {
             
             int bytesToCopy = std::min(NETWORK_BUFFER_LENGTH_BYTES_PER_CHANNEL,
-                                       _sampleByteArray.size() - _currentSendPosition);
+                                       soundByteArray.size() - currentSendPosition);
             
             // copy the next NETWORK_BUFFER_LENGTH_BYTES_PER_CHANNEL bytes to the packet
-            memcpy(currentPacketPosition, _sampleByteArray.data() + _currentSendPosition,
+            memcpy(currentPacketPosition, soundByteArray.data() + currentSendPosition,
                    bytesToCopy);
             
             
@@ -143,11 +123,11 @@ void AudioInjector::injectAudio(AbstractAudioInterface* localAudioInterface) {
                                                         audioMixer->getActiveSocket()->getPort());
             }
             
-            _currentSendPosition += bytesToCopy;
+            currentSendPosition += bytesToCopy;
             
             // send two packets before the first sleep so the mixer can start playback right away
             
-            if (_currentSendPosition != bytesToCopy && _currentSendPosition < _sampleByteArray.size()) {
+            if (currentSendPosition != bytesToCopy && currentSendPosition < soundByteArray.size()) {
                 // not the first packet and not done
                 // sleep for the appropriate time
                 int usecToSleep = usecTimestamp(&startTime) + (++nextFrame * BUFFER_SEND_INTERVAL_USECS) - usecTimestampNow();

libraries/audio/src/AudioInjector.h

@@ -2,7 +2,7 @@
 //  AudioInjector.h
 //  hifi
 //
-//  Created by Stephen Birarda on 12/19/2013.
+//  Created by Stephen Birarda on 1/2/2014.
 //  Copyright (c) 2013 HighFidelity, Inc. All rights reserved.
 //
 
@@ -11,22 +11,15 @@
 
 #include <QtCore/QObject>
 #include <QtCore/QThread>
-#include <QtCore/QUrl>
 
 #include <glm/glm.hpp>
 #include <glm/gtx/quaternion.hpp>
 
-class AbstractAudioInterface;
-class QNetworkReply;
-
-const uchar MAX_INJECTOR_VOLUME = 0xFF;
+#include "Sound.h"
 
 class AudioInjector : public QObject {
-    Q_OBJECT
 public:
-    AudioInjector(const QUrl& sampleURL);
-    
-    int size() const { return _sampleByteArray.size(); }
+    AudioInjector(Sound* sound);
     
     void setPosition(const glm::vec3& position) { _position = position; }
     void setOrientation(const glm::quat& orientation) { _orientation = orientation; }
@@ -34,20 +27,14 @@ public:
     void setShouldLoopback(bool shouldLoopback) { _shouldLoopback = shouldLoopback; }
 public slots:
     void injectViaThread(AbstractAudioInterface* localAudioInterface = NULL);
-    
 private:
-    QByteArray _sampleByteArray;
-    int _currentSendPosition;
     QThread _thread;
-    QUrl _sourceURL;
-    glm::vec3 _position;
-    glm::quat _orientation;
+    Sound* _sound;
     float _volume;
     uchar _shouldLoopback;
-    
+    glm::vec3 _position;
+    glm::quat _orientation;
 private slots:
-    void startDownload();
-    void replyFinished(QNetworkReply* reply);
     void injectAudio(AbstractAudioInterface* localAudioInterface);
 };
 

libraries/audio/src/Sound.cpp

@@ -0,0 +1,29 @@
+//
+//  Sound.cpp
+//  hifi
+//
+//  Created by Stephen Birarda on 1/2/2014.
+//  Copyright (c) 2013 HighFidelity, Inc. All rights reserved.
+//
+
+#include <QtNetwork/QNetworkAccessManager>
+#include <QtNetwork/QNetworkRequest>
+#include <QtNetwork/QNetworkReply>
+
+#include "Sound.h"
+
+Sound::Sound(const QUrl& sampleURL) {
+    // assume we have a QApplication or QCoreApplication instance and use the
+    // QNetworkAccess manager to grab the raw audio file at the given URL
+    
+    QNetworkAccessManager *manager = new QNetworkAccessManager(this);
+    connect(manager, SIGNAL(finished(QNetworkReply*)),
+            this, SLOT(replyFinished(QNetworkReply*)));
+    
+    manager->get(QNetworkRequest(sampleURL));
+}
+
+void Sound::replyFinished(QNetworkReply* reply) {
+    // replace our samples array with the downloaded data
+    _sampleByteArray = reply->readAll();
+}

libraries/audio/src/Sound.h

@@ -0,0 +1,27 @@
+//
+//  Sound.h
+//  hifi
+//
+//  Created by Stephen Birarda on 1/2/2014.
+//  Copyright (c) 2013 HighFidelity, Inc. All rights reserved.
+//
+
+#ifndef __hifi__Sound__
+#define __hifi__Sound__
+
+#include <QtCore/QObject>
+
+class QNetworkReply;
+
+class Sound : public QObject {
+public:
+    Sound(const QUrl& sampleURL);
+    
+    const QByteArray& getByteArray() { return _byteArray; }
+private:
+    QByteArray _byteArray;
+private slots:
+    void replyFinished(QNetworkReply* reply);
+};
+
+#endif /* defined(__hifi__Sound__) */