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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 "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);
}
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