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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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include "artsflow.h"
#include "debug.h"
#include "convert.h"
#include "objectmanager.h"
#include "audiosubsys.h"
#include "dispatcher.h"
#include "iomanager.h"
#include "flowsystem.h"
#include "stdsynthmodule.h"
#include <stdio.h>
#include <iostream>
#include <cstring>
#undef DEBUG_WAVEFORM
#ifdef DEBUG_WAVEFORM
#include <fstream>
#endif
using namespace std;
using namespace Arts;
namespace Arts {
class Synth_RECORD_impl : virtual public Synth_RECORD_skel,
virtual public ASConsumer,
virtual public StdSynthModule
{
#ifdef DEBUG_WAVEFORM
ofstream plotfile;
#endif
protected:
AudioSubSystem *as;
bool haveSubSys;
typedef unsigned char uchar;
unsigned char *inblock;
unsigned long maxsamples;
unsigned long channels;
int format;
int bits;
public:
#ifdef DEBUG_WAVEFORM
Synth_RECORD_impl()
: plotfile( "/dev/shm/synth_record.plot" )
{
}
#endif
/*
* functions from the SynthModule interface (which is inherited by
* SynthPlay)
*/
void streamInit() {
as = AudioSubSystem::the();
channels = as->channels();
format = as->format();
bits = as->bits();
maxsamples = 0;
inblock = 0;
haveSubSys = as->attachConsumer(this);
if(!haveSubSys)
{
arts_info("Synth_RECORD: audio subsystem is already used");
return;
}
}
void streamEnd() {
arts_debug("Synth_RECORD: detaching");
if(haveSubSys) as->detachConsumer();
if(inblock)
{
delete[] inblock;
inblock = 0;
}
}
AutoSuspendState autoSuspend()
{
return static_cast<AutoSuspendState>(asSuspend|asProducer);
}
void calculateBlock(unsigned long samples)
{
// no audio subsystem, no play
if(!as->running() || !haveSubSys) return;
if(samples > maxsamples)
{
maxsamples = samples;
if(inblock) delete[] inblock;
inblock = new uchar[maxsamples * channels * bits / 8];
}
assert(channels);
as->read(inblock,channels * (bits/8) * samples);
arts_assert(format == 8 || format == 16 || format == 17 || format == 32);
if(format == 8)
{
if(channels == 1)
convert_mono_8_float(samples,inblock,left);
if(channels == 2)
convert_stereo_i8_2float(samples,inblock,left,right);
}
else if(format == 16)
{
if(channels == 1)
convert_mono_16le_float(samples,inblock,left);
if(channels == 2)
convert_stereo_i16le_2float(samples,inblock,left,right);
}
else if(format == 17)
{
if(channels == 1)
convert_mono_16be_float(samples,inblock,left);
if(channels == 2)
convert_stereo_i16be_2float(samples,inblock,left,right);
}
else if(format == 32)
{
if(channels == 2)
{
float * end = (float *)(inblock + 8 * samples);
float * floatbuffer = (float *)inblock;
while(floatbuffer < end)
{
#ifdef DEBUG_WAVEFORM
plotfile << *floatbuffer << "\n";
#endif
*left++ = *floatbuffer++;
*right++ = *floatbuffer++;
}
}
else if(channels == 1)
memcpy(left, inblock, samples);
}
}
/**
* havemore from the ASConsumer interface (AudioSubSystem)
*/
void haveMore()
{
_node()->requireFlow();
}
};
REGISTER_IMPLEMENTATION(Synth_RECORD_impl);
}
// vim: sw=4 ts=4
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