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Diffstat (limited to 'soundserver/wavplayobject_impl.cpp')
| -rw-r--r-- | soundserver/wavplayobject_impl.cpp | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/soundserver/wavplayobject_impl.cpp b/soundserver/wavplayobject_impl.cpp new file mode 100644 index 0000000..8f5f2f1 --- /dev/null +++ b/soundserver/wavplayobject_impl.cpp @@ -0,0 +1,172 @@ + /* + + Copyright (C) 2000 Stefan Westerfeld + + 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 |