1 files changed, 99 insertions, 0 deletions
diff --git a/examples/playtofile_impl.cpp b/examples/playtofile_impl.cpp
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+    /*
+
+    Copyright (C) 2000 Stefan Westerfeld
+                       stefan@space.twc.de
+
+    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 "playtofile.h"
+#include "flowsystem.h"
+#include "stdsynthmodule.h"
+#include "convert.h"
+#include "stdio.h"
+
+using namespace Arts;
+using namespace std;
+
+namespace Arts {
+	class PlayToFile_impl : virtual public PlayToFile_skel,
+							virtual public StdSynthModule
+	{
+		typedef unsigned char uchar;
+		unsigned char *outblock;
+		unsigned long maxsamples;
+		string _filename;
+		FILE *out;
+	public:
+		PlayToFile_impl()  : _filename("-")
+		{
+		}
+		void filename(const string& newfilename) {
+			_filename = newfilename;
+			filename_changed(_filename);
+		}
+
+		string filename() { return _filename; }
+
+		void streamInit() {
+			maxsamples = 0;
+			outblock = 0;
+			if(_filename == "-")
+				out = stdout;
+			else
+				out = fopen(_filename.c_str(),"w");
+		}
+		void streamEnd() {
+			if(outblock)
+			{
+				delete[] outblock;
+				outblock = 0;
+			}
+			if(out != stdout)
+			{
+				fclose(out);
+			}
+		}
+
+		void calculateBlock(unsigned long samples)
+		{
+			if(samples > maxsamples)
+			{
+				maxsamples = samples;
+
+				if(outblock) delete[] outblock;
+				outblock = new uchar[maxsamples * 4]; // 2 channels, 16 bit
+			}
+
+			convert_stereo_2float_i16le(samples,left,right, outblock);
+			fwrite(outblock, 1, 4 * samples,out);
+		}
+
+		/*
+		 * this is the most tricky part here - since we will run in a context
+		 * where no audio hardware will play the "give me more data role",
+		 * we'll have to request things ourselves (requireFlow() tells the
+		 * flowsystem that more signal flow should happen, so that
+		 * calculateBlock will get called
+		 */
+		void goOn()
+		{
+			_node()->requireFlow();
+		}
+	};
+	REGISTER_IMPLEMENTATION(PlayToFile_impl);
+};