1 files changed, 119 insertions, 0 deletions
diff --git a/flow/bytestreamtoaudio_impl.cpp b/flow/bytestreamtoaudio_impl.cpp
new file mode 100644
index 0000000..de9ef7c
--- /dev/null
+++ b/flow/bytestreamtoaudio_impl.cpp
@@ -0,0 +1,119 @@
+    /*
+
+    Copyright (C) 2000 Stefan Westerfeld
+                       [email protected]
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+
+    */
+
+#include "artsflow.h"
+#include "stdsynthmodule.h"
+#include "resample.h"
+
+#include <cstring>
+
+using namespace std;
+using namespace Arts;
+
+namespace Arts {
+
+class PacketRefiller : public Refiller {
+protected:
+	queue< DataPacket<mcopbyte>* > inqueue;
+	int pos;
+
+public:
+	PacketRefiller() : pos(0)
+	{
+	}
+	void process(DataPacket<mcopbyte>* packet)
+	{
+		inqueue.push(packet);
+	}
+	unsigned long read(unsigned char *buffer, unsigned long bytes)
+	{
+		unsigned long done = 0;
+		while(!inqueue.empty())
+		{
+			long tocopy = bytes - done;
+			if(tocopy == 0) return bytes;			/* complete? */
+
+			DataPacket<mcopbyte> *packet = inqueue.front();
+			if(tocopy > (packet->size - pos))
+				tocopy = (packet->size - pos);
+
+			memcpy(&buffer[done],&packet->contents[pos],tocopy);
+			pos += tocopy;
+			done += tocopy;
+
+			if(pos == packet->size) {
+				packet->processed();
+				pos = 0;
+				inqueue.pop();
+			}
+		}
+		return done;
+	}
+};
+
+class ByteStreamToAudio_impl : public ByteStreamToAudio_skel,
+                               public StdSynthModule
+{
+	PacketRefiller refiller;
+	Resampler resampler;
+	long _samplingRate, _channels, _bits;
+public:
+	ByteStreamToAudio_impl() :resampler(&refiller),
+			_samplingRate(44100), _channels(2), _bits(16)
+	{
+		//
+	}
+
+	long samplingRate() { return _samplingRate; }
+	void samplingRate(long newRate) {
+		_samplingRate = newRate;
+		resampler.setStep((float)_samplingRate / samplingRateFloat);
+	}
+
+	long channels() { return _channels; }
+	void channels(long newChannels) {
+		_channels = newChannels;
+		resampler.setChannels(_channels);
+	}
+
+	long bits() { return _bits; }
+	void bits(long newBits) {
+		_bits = newBits;
+		resampler.setBits(_bits);
+	}
+
+	bool running() { return !resampler.underrun(); }
+
+	void process_indata(DataPacket<mcopbyte> *packet)
+	{
+		refiller.process(packet);
+	}
+
+	void calculateBlock(unsigned long samples)
+	{
+		resampler.run(left,right,samples);
+	}
+};
+
+REGISTER_IMPLEMENTATION(ByteStreamToAudio_impl);
+
+}