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120 lines
2.8 KiB
120 lines
2.8 KiB
/*
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Copyright (C) 2000 Stefan Westerfeld
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stefan@space.twc.de
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#include "artsflow.h"
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#include "stdsynthmodule.h"
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#include "resample.h"
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#include <cstring>
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using namespace std;
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using namespace Arts;
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namespace Arts {
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class PacketRefiller : public Refiller {
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protected:
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queue< DataPacket<mcopbyte>* > inqueue;
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int pos;
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public:
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PacketRefiller() : pos(0)
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{
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}
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void process(DataPacket<mcopbyte>* packet)
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{
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inqueue.push(packet);
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}
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unsigned long read(unsigned char *buffer, unsigned long bytes)
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{
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unsigned long done = 0;
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while(!inqueue.empty())
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{
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long tocopy = bytes - done;
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if(tocopy == 0) return bytes; /* complete? */
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DataPacket<mcopbyte> *packet = inqueue.front();
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if(tocopy > (packet->size - pos))
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tocopy = (packet->size - pos);
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memcpy(&buffer[done],&packet->contents[pos],tocopy);
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pos += tocopy;
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done += tocopy;
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if(pos == packet->size) {
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packet->processed();
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pos = 0;
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inqueue.pop();
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}
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}
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return done;
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}
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};
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class ByteStreamToAudio_impl : public ByteStreamToAudio_skel,
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public StdSynthModule
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{
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PacketRefiller refiller;
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Resampler resampler;
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long _samplingRate, _channels, _bits;
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public:
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ByteStreamToAudio_impl() :resampler(&refiller),
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_samplingRate(44100), _channels(2), _bits(16)
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{
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//
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}
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long samplingRate() { return _samplingRate; }
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void samplingRate(long newRate) {
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_samplingRate = newRate;
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resampler.setStep((float)_samplingRate / samplingRateFloat);
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}
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long channels() { return _channels; }
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void channels(long newChannels) {
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_channels = newChannels;
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resampler.setChannels(_channels);
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}
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long bits() { return _bits; }
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void bits(long newBits) {
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_bits = newBits;
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resampler.setBits(_bits);
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}
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bool running() { return !resampler.underrun(); }
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void process_indata(DataPacket<mcopbyte> *packet)
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{
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refiller.process(packet);
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}
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void calculateBlock(unsigned long samples)
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{
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resampler.run(left,right,samples);
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}
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};
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REGISTER_IMPLEMENTATION(ByteStreamToAudio_impl);
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}
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