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/*
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 "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);
};
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