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// converter.C
/******************************************************************************
*
* MiXViews - an X window system based sound & data editor/processor
*
* Copyright (c) 1993, 1994 Regents of the University of California
*
* Author: Douglas Scott
* Date: December 13, 1994
*
* Permission to use, copy and modify this software and its documentation
* for research and/or educational purposes and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation. The author reserves the right to distribute this
* software and its documentation. The University of California and the author
* make no representations about the suitability of this software for any
* purpose, and in no event shall University of California be liable for any
* damage, loss of data, or profits resulting from its use.
* It is provided "as is" without express or implied warranty.
*
******************************************************************************/
#ifdef __GNUG__
#pragma implementation
#endif
#include <InterViews/action.h>
#include "application.h"
#include "converter.h"
#include "localdefs.h"
#include "requester.h"
#include "sound.h"
// global initializations
Converter* Converter::converterInstance = nil;
// Create converter appropriate for platform, check for successful
// initialization. NullConverter instance is returned if init failed.
Converter *
Converter::getInstance() {
if(converterInstance == nil) {
converterInstance = create();
if(converterInstance->ready() == false) {
destroyInstance();
converterInstance = new NullConverter;
}
converterInstance->ref();
}
return converterInstance;
}
void
Converter::destroyInstance() {
Resource::unref(converterInstance);
converterInstance = nil;
}
void
Converter::useNative(boolean b) {
if(usingNative != b) {
usingNative = b;
destroyInstance();
}
}
// methods for base class for "real" (associated with hardware) converters
// global initializations
Action* RealConverter::recordDoneAction = nil;
RealConverter::Status RealConverter::theStatus = Stopped;
RealConverter::RealConverter() : mySound(nil), goingTo(Play) {
initialize();
}
RealConverter::~RealConverter() {
setSound(nil);
setRecordDoneAction(nil);
}
void
RealConverter::initialize() {
setStatus(Stopped); // static, so reset for each ctor call
}
boolean
RealConverter::hasPlayableFormat(Sound *snd) {
return isPlayableFormat(snd->dataType());
}
boolean
RealConverter::ready() const { return good(); }
boolean
RealConverter::running() {
return playing() || recording();
}
void
RealConverter::reset() {
if(!running()) // dont do reset if currently running
initialize();
}
void
RealConverter::setSound(Sound* sound) {
if(sound != mySound) {
Resource::unref(mySound);
mySound = sound;
if(mySound != nil)
mySound->ref();
}
}
int
RealConverter::sampleRate() { return mySound->sRate(); }
int
RealConverter::channels() { return mySound->nChans(); }
DataType
RealConverter::dataType() { return mySound->dataType(); }
const void *
RealConverter::pointerToData() { return mySound->getDataPointer(); }
INT32
RealConverter::dataSize() { return mySound->sizeInBytes(); }
double
RealConverter::peakAmplitude() { return mySound->peakAmp(); }
int
RealConverter::checkLength(int nsamps) {
int status = true;
if(nsamps == 0) {
Application::alert("Play/Record error:", "Zero length sound.");
status = false;
}
return status;
}
void
RealConverter::setRecordDoneAction(Action *a) {
if(a != recordDoneAction) {
Resource::unref(recordDoneAction);
recordDoneAction = a;
if(recordDoneAction != nil)
recordDoneAction->ref();
}
}
int
RealConverter::configure(Sound* sound, GoingTo wantTo) {
int status = false;
if(!running()) {
goingTo = wantTo;
reset();
setSound(sound);
if(checkLength(sound->nSamps()) &&
checkDataType(sound->dataType()) &&
checkChannels(sound->nChans()) &&
checkSampleRate(sound->sRate())
) {
status = doConfigure();
}
else fail();
}
else
Application::alert("Converter is currently in use.");
return status;
}
int
RealConverter::start(StatusAction *askedToStop, Action* whenDone) {
int status = (good() && soundIsLoaded());
if(status) {
ignoreSignals(true);
status = willPlay() ?
startPlaying(askedToStop) : startRecording(askedToStop, whenDone);
ignoreSignals(false);
}
goingTo = Play; // always reset to play -- next config will set
return status;
}
int
RealConverter::stop() {
if(recording())
doRecordDoneAction();
setStatus(Stopped);
return true;
};
void
RealConverter::configureHardware(Controller* controller) {
Requester* requester = nil;
if((requester = configRequester()) != nil)
requester->queryForValues(controller);
}
void
RealConverter::doRecordDoneAction() {
if(recordDoneAction != nil)
recordDoneAction->execute();
}
int
RealConverter::startPlaying(StatusAction *askedToStop) {
setStatus(Playing);
return doConversion(askedToStop);
}
int
RealConverter::startRecording(StatusAction *askedToStop, Action* whenDone) {
setRecordDoneAction(whenDone);
setStatus(Recording);
return doRecording(askedToStop);
}
int
RealConverter::error(const char* msg1, const char* msg2) {
fail();
Application::error(msg1, msg2);
return false;
}
boolean
RealConverter::notImplemented() const {
Application::alert("This command is not implemented for this converter.");
return false;
}
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