Made sure SoundStream adhered to its documented behavior, added a hint to SoundStream and Sound documentation regarding setting the offset while stopped.

include/SFML/Audio/Sound.hpp

@@ -144,7 +144,9 @@ public :
     /// \brief Change the current playing position of the sound
     ///
     /// The playing position can be changed when the sound is
-    /// either paused or playing.
+    /// either paused or playing. Changing the playing position
+    /// when the sound is stopped has no effect, since playing
+    /// the sound would reset its position.
     ///
     /// \param timeOffset New playing position, from the beginning of the sound
     ///

include/SFML/Audio/SoundStream.hpp

@@ -132,7 +132,9 @@ public :
     /// \brief Change the current playing position of the stream
     ///
     /// The playing position can be changed when the stream is
-    /// either paused or playing.
+    /// either paused or playing. Changing the playing position
+    /// when the stream is stopped has no effect, since playing
+    /// the stream would reset its position.
     ///
     /// \param timeOffset New playing position, from the beginning of the stream
     ///

src/SFML/Audio/SoundStream.cpp

@@ -92,17 +92,29 @@ void SoundStream::play()
         return;
     }
 
+    bool isStreaming = false;
+    Status threadStartState = Stopped;
+
     {
         Lock lock(m_threadMutex);
 
-        // If the sound is already playing (probably paused), just resume it
+        isStreaming = m_isStreaming;
-        if (m_isStreaming)
+        threadStartState = m_threadStartState;
+    }
+
+
+    if (isStreaming && (threadStartState == Paused))
     {
+        // If the sound is paused, resume it
+        Lock lock(m_threadMutex);
+        m_threadStartState = Playing;
         alCheck(alSourcePlay(m_source));
         return;
     }
-
+    else if (isStreaming && (threadStartState == Playing))
-        m_isStreaming = true;
+    {
+        // If the sound is playing, stop it and continue as if it was stopped
+        stop();
     }
 
     // Move to the beginning
@@ -110,6 +122,7 @@ void SoundStream::play()
 
     // Start updating the stream in a separate thread to avoid blocking the application
     m_samplesProcessed = 0;
+    m_isStreaming = true;
     m_threadStartState = Playing;
     m_thread.launch();
 }
@@ -121,6 +134,10 @@ void SoundStream::pause()
     // Handle pause() being called before the thread has started
     {
         Lock lock(m_threadMutex);
+
+        if (!m_isStreaming)
+            return;
+
         m_threadStartState = Paused;
     }
 
@@ -139,6 +156,12 @@ void SoundStream::stop()
 
     // Wait for the thread to terminate
     m_thread.wait();
+
+    // Move to the beginning
+    onSeek(Time::Zero);
+
+    // Reset the playing position
+    m_samplesProcessed = 0;
 }