Added support for the CMake build system

git-svn-id: https://sfml.svn.sourceforge.net/svnroot/sfml/branches/sfml2@1550 4e206d99-4929-0410-ac5d-dfc041789085

examples/voip/Server.cpp

@@ -0,0 +1,200 @@
+
+////////////////////////////////////////////////////////////
+// Headers
+////////////////////////////////////////////////////////////
+#include <SFML/Audio.hpp>
+#include <SFML/Network.hpp>
+#include <iomanip>
+#include <iostream>
+#include <iterator>
+
+
+const sf::Uint8 audioData   = 1;
+const sf::Uint8 endOfStream = 2;
+
+
+////////////////////////////////////////////////////////////
+/// Customized sound stream for acquiring audio data
+/// from the network
+////////////////////////////////////////////////////////////
+class NetworkAudioStream : public sf::SoundStream
+{
+public :
+
+    ////////////////////////////////////////////////////////////
+    /// Default constructor
+    ///
+    ////////////////////////////////////////////////////////////
+    NetworkAudioStream() :
+    myOffset     (0),
+    myHasFinished(false)
+    {
+        // Set the sound parameters
+        Initialize(1, 44100);
+    }
+
+    ////////////////////////////////////////////////////////////
+    /// Run the server, stream audio data from the client
+    ///
+    ////////////////////////////////////////////////////////////
+    void Start(unsigned short port)
+    {
+        if (!myHasFinished)
+        {
+            // Listen to the given port for incoming connections
+            if (myListener.Listen(port) != sf::Socket::Done)
+                return;
+            std::cout << "Server is listening to port " << port << ", waiting for connections... " << std::endl;
+
+            // Wait for a connection
+            if (myListener.Accept(myClient) != sf::Socket::Done)
+                return;
+            std::cout << "Client connected: " << myClient.GetRemoteAddress() << std::endl;
+
+            // Start playback
+            Play();
+
+            // Start receiving audio data
+            ReceiveLoop();
+        }
+        else
+        {
+            // Start playback
+            Play();
+        }
+    }
+
+private :
+
+    ////////////////////////////////////////////////////////////
+    /// /see SoundStream::OnGetData
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual bool OnGetData(sf::SoundStream::Chunk& data)
+    {
+        // We have reached the end of the buffer and all audio data have been played : we can stop playback
+        if ((myOffset >= mySamples.size()) && myHasFinished)
+            return false;
+
+        // No new data has arrived since last update : wait until we get some
+        while ((myOffset >= mySamples.size()) && !myHasFinished)
+            sf::Sleep(0.01f);
+
+        // Copy samples into a local buffer to avoid synchronization problems
+        // (don't forget that we run in two separate threads)
+        {
+            sf::Lock lock(myMutex);
+            myTempBuffer.assign(mySamples.begin() + myOffset, mySamples.end());
+        }
+
+        // Fill audio data to pass to the stream
+        data.Samples   = &myTempBuffer[0];
+        data.NbSamples = myTempBuffer.size();
+
+        // Update the playing offset
+        myOffset += myTempBuffer.size();
+
+        return true;
+    }
+
+    ////////////////////////////////////////////////////////////
+    /// /see SoundStream::OnSeek
+    ///
+    ////////////////////////////////////////////////////////////
+    virtual void OnSeek(float timeOffset)
+    {
+        myOffset = static_cast<std::size_t>(timeOffset * GetSampleRate() * GetChannelsCount());
+    }
+
+    ////////////////////////////////////////////////////////////
+    /// Get audio data from the client until playback is stopped
+    ///
+    ////////////////////////////////////////////////////////////
+    void ReceiveLoop()
+    {
+        while (!myHasFinished)
+        {
+            // Get waiting audio data from the network
+            sf::Packet packet;
+            if (myClient.Receive(packet) != sf::Socket::Done)
+                break;
+
+            // Extract the message ID
+            sf::Uint8 id;
+            packet >> id;
+
+            if (id == audioData)
+            {
+                // Extract audio samples from the packet, and append it to our samples buffer
+                const sf::Int16* samples   = reinterpret_cast<const sf::Int16*>(packet.GetData() + 1);
+                std::size_t      nbSamples = (packet.GetDataSize() - 1) / sizeof(sf::Int16);
+
+                // Don't forget that the other thread can access the samples array at any time
+                // (so we protect any operation on it with the mutex)
+                {
+                    sf::Lock lock(myMutex);
+                    std::copy(samples, samples + nbSamples, std::back_inserter(mySamples));
+                }
+            }
+            else if (id == endOfStream)
+            {
+                // End of stream reached : we stop receiving audio data
+                std::cout << "Audio data has been 100% received!" << std::endl;
+                myHasFinished = true;
+            }
+            else
+            {
+                // Something's wrong...
+                std::cout << "Invalid packet received..." << std::endl;
+                myHasFinished = true;
+            }
+        }
+    }
+
+    ////////////////////////////////////////////////////////////
+    // Member data
+    ////////////////////////////////////////////////////////////
+    sf::TcpListener        myListener;
+    sf::TcpSocket          myClient;
+    sf::Mutex              myMutex;
+    std::vector<sf::Int16> mySamples;
+    std::vector<sf::Int16> myTempBuffer;
+    std::size_t            myOffset;
+    bool                   myHasFinished;
+};
+
+
+////////////////////////////////////////////////////////////
+/// Launch a server and wait for incoming audio data from
+/// a connected client
+///
+////////////////////////////////////////////////////////////
+void DoServer(unsigned short port)
+{
+    // Build an audio stream to play sound data as it is received through the network
+    NetworkAudioStream audioStream;
+    audioStream.Start(port);
+
+    // Loop until the sound playback is finished
+    while (audioStream.GetStatus() != sf::SoundStream::Stopped)
+    {
+        // Leave some CPU time for other threads
+        sf::Sleep(0.1f);
+    }
+
+    std::cin.ignore(10000, '\n');
+
+    // Wait until the user presses 'enter' key
+    std::cout << "Press enter to replay the sound..." << std::endl;
+    std::cin.ignore(10000, '\n');
+
+    // Replay the sound (just to make sure replaying the received data is OK)
+    audioStream.Play();
+
+    // Loop until the sound playback is finished
+    while (audioStream.GetStatus() != sf::SoundStream::Stopped)
+    {
+        // Leave some CPU time for other threads
+        sf::Sleep(0.1f);
+    }
+}