SOUND: Add a packetized PCM stream

src/sound/decoders/pcm.cpp

@@ -152,4 +152,24 @@ RewindableAudioStream *makePCMStream(Common::SeekableReadStream *stream,
 	}
 }
 
+class PacketizedPCMStream : public StatelessPacketizedAudioStream {
+public:
+	PacketizedPCMStream(int rate, byte flags, int channels) :
+		StatelessPacketizedAudioStream(rate, channels), _flags(flags) {}
+
+protected:
+	AudioStream *makeStream(Common::SeekableReadStream *data);
+
+private:
+	byte _flags;
+};
+
+AudioStream *PacketizedPCMStream::makeStream(Common::SeekableReadStream *data) {
+	return makePCMStream(data, getRate(), _flags, getChannels());
+}
+
+PacketizedAudioStream *makePacketizedPCMStream(int rate, byte flags, int channels) {
+	return new PacketizedPCMStream(rate, flags, channels);
+}
+
 } // End of namespace Sound

src/sound/decoders/pcm.h

@@ -52,6 +52,9 @@
 
 namespace Sound {
 
+class PacketizedAudioStream;
+class RewindableAudioStream;
+
 /**
  * Various flags which can be bit-ORed and then passed to
  * makeRawMemoryStream and some other AudioStream factories
@@ -88,6 +91,17 @@ RewindableAudioStream *makePCMStream(Common::SeekableReadStream *stream,
                                    int rate, byte flags, int channels,
                                    bool disposeAfterUse = true);
 
+/**
+ * Creates a PacketizedAudioStream that will automatically queue
+ * packets as individual AudioStreams like returned by makePCMStream.
+ *
+ * @param rate   Rate of the sound data.
+ * @param flags	 Audio flags combination.
+ * @see PCMFlags
+ * @return The new PacketizedAudioStream.
+ */
+PacketizedAudioStream *makePacketizedPCMStream(int rate, byte flags, int channels);
+
 } // End of namespace Sound
 
 #endif // SOUND_DECODERS_RAW_H