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authortpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2010-01-05 00:01:18 +0000
committertpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2010-01-05 00:01:18 +0000
commit42995d7bf396933ee60c5f89c354ea89cf13df0d (patch)
treecfdcea0ac57420e7baf570bfe435e107bb842541 /examples/playtofile_impl.cc
downloadarts-42995d7bf396933ee60c5f89c354ea89cf13df0d.tar.gz
arts-42995d7bf396933ee60c5f89c354ea89cf13df0d.zip
Copy of aRts for Trinity modifications
git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/dependencies/arts@1070145 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
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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., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, 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);
+};