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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., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "config.h"
#ifdef HAVE_LIBAUDIOFILE
#include "soundserver.h"
#include "cachedwav.h"
#include "stdsynthmodule.h"
#include "convert.h"
#include "debug.h"
#include <math.h>
using namespace std;
using namespace Arts;
class WavPlayObject_impl :public WavPlayObject_skel, public StdSynthModule {
protected:
CachedWav *wav;
double flpos;
poState _state;
int sampleCount()
{
if(!wav) return 0;
return wav->bufferSize / wav->channelCount / (wav->sampleWidth/8);
}
public:
/*
* construction, destruction
*/
WavPlayObject_impl() :wav(0), flpos(0.0), _state(posIdle)
{
arts_debug("WavPlayObject_impl");
}
virtual ~WavPlayObject_impl()
{
arts_debug("~WavPlayObject_impl");
if(wav) wav->decRef();
}
/*
* KMedia2 private interface
*/
bool loadMedia(const string &filename) {
arts_debug("Wav: loadMedia %s", filename.c_str());
wav = CachedWav::load(Cache::the(), filename);
return (wav != 0);
}
/*
* KMedia2 interface
*/
string description() {
return "no description (see "__FILE__")";
}
poTime currentTime() {
if(!wav) return poTime(0,0,0,"samples");
float timesec = flpos / (float)wav->samplingRate;
float timems = (timesec - floor(timesec)) * 1000.0;
return poTime( int( timesec ), int( timems ), (int)flpos, "samples" );
}
poTime overallTime() {
float timesec = (float)sampleCount() / (float)wav->samplingRate;
float timems = (timesec - floor(timesec)) * 1000.0;
return poTime( int( timesec ), int( timems ), sampleCount(), "samples" );
}
poCapabilities capabilities() {
return static_cast<poCapabilities>(capPause+capSeek);
}
string mediaName() {
return wav ? wav->mediaName() : "";
}
poState state() {
return _state;
}
void play() {
_state = posPlaying;
}
void halt() {
_state = posIdle;
flpos = 0.0;
}
void seek(const class poTime &newTime) {
if(!wav) return;
float fnewsamples = -1;
if(newTime.seconds != -1 && newTime.ms != -1)
{
float flnewtime = (float)newTime.seconds+((float)newTime.ms/1000.0);
fnewsamples = flnewtime * (float)wav->samplingRate;
}
else if(newTime.custom >= 0 && newTime.customUnit == "samples")
{
fnewsamples = newTime.custom;
}
if(fnewsamples > (float)sampleCount())
fnewsamples = (float)sampleCount();
if(fnewsamples >= 0) flpos = fnewsamples;
}
void pause() {
arts_debug("pause");
_state = posPaused;
}
void calculateBlock(unsigned long samples) {
unsigned long haveSamples = 0;
if(wav && _state == posPlaying)
{
double speed = wav->samplingRate / samplingRateFloat;
haveSamples = uni_convert_stereo_2float(samples, wav->buffer,
wav->bufferSize,wav->channelCount,wav->sampleWidth,
left,right,speed,flpos);
flpos += (double)haveSamples * speed;
}
if(haveSamples != samples)
{
unsigned long i;
for(i=haveSamples;i<samples;i++)
left[i] = right[i] = 0.0;
if(_state == posPlaying) {
_state = posIdle;
flpos = 0.0;
}
}
}
};
REGISTER_IMPLEMENTATION(WavPlayObject_impl);
#endif
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