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/* This file is part of the KDE project.
Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2.1 or 3 of the License.
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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef PHONON_MMF_UTILS_H
#define PHONON_MMF_UTILS_H
#include <private/qcore_symbian_p.h>
#include <e32debug.h> // for RDebug
#include <QtCore/QCoreApplication> // for Q_DECLARE_TR_FUNCTIONS
#include <QColor>
#include "defs.h"
QT_BEGIN_NAMESPACE
namespace Phonon
{
namespace MMF
{
/**
* Panic codes for fatal errors
*/
enum PanicCode {
InvalidStatePanic = 1,
InvalidMediaTypePanic = 2,
InvalidBackendInterfaceClass = 3
};
class Utils
{
Q_DECLARE_TR_FUNCTIONS(Utils)
public:
/**
* Raise a fatal exception
*/
static void panic(PanicCode code);
/**
* Determines whether the provided MIME type is an audio or video
* type. If it is neither, the function returns MediaTypeUnknown.
*/
static MediaType mimeTypeToMediaType(const TDesC& mimeType);
/**
* Translates a Symbian error code into a user-readable string.
*/
static QString symbianErrorToString(int errorCode);
#ifndef QT_NO_DEBUG
/**
* Retrieve color of specified pixel from the screen.
*/
static QColor getScreenPixel(const QPoint& pos);
/**
* Samples a small number of pixels from the screen, and dumps their
* colors to the debug log.
*/
static void dumpScreenPixelSample();
#endif
};
/**
* Available trace categories;
*/
enum TTraceCategory {
/**
* Backend
*/
EBackend = 0x00000001,
/**
* Functions which map directly to the public Phonon audio API
*/
EAudioApi = 0x00000010,
/**
* Internal functions in the audio implementation
*/
EAudioInternal = 0x00000020,
/**
* Functions which map directly to the public Phonon video API
*/
EVideoApi = 0x00010000,
/**
* Internal functions in the video implementation
*/
EVideoInternal = 0x00020000
};
/**
* Mask indicating which trace categories are enabled
*
* Note that, at the moment, this is a compiled static constant. For
* runtime control over enabled trace categories, this could be replaced
* by a per-thread singleton object which owns the trace mask, and which
* exposes an API allowing it to be modified.
*/
static const TUint KTraceMask = 0xffffffff;
/**
* Data structure used by tracing macros
*/
class TTraceContext
{
public:
TTraceContext(const TText* aFunction, const TUint aAddr,
const TUint aCategory = 0)
: iFunction(aFunction),
iAddr(aAddr),
iCategory(aCategory) { }
/**
* Check whether iCategory appears in the trace mask
*/
TBool Enabled() const {
return (iCategory == 0) or(iCategory & KTraceMask);
}
const TText* iFunction; // Name of function
const TUint iAddr; // 'this' pointer
const TUint iCategory;
};
// Macros used internally by the trace system
#define _TRACE_PRINT RDebug::Print
#define _TRACE_TEXT(x) (TPtrC((const TText *)(x)))
#define _TRACE_MODULE Phonon::MMF
// Macros available for use by implementation code
#ifndef QT_NO_DEBUG
#define TRACE_CONTEXT(_fn, _cat) const ::Phonon::MMF::TTraceContext _tc((TText*)L ## #_fn, (TUint)this, _cat);
#define TRACE_ENTRY_0() { if (_tc.Enabled()) _TRACE_PRINT(_TRACE_TEXT(L ## "+ Phonon::MMF::%s [0x%08x]"), _tc.iFunction, _tc.iAddr); }
#define TRACE_ENTRY(string, args...) { if (_tc.Enabled()) _TRACE_PRINT(_TRACE_TEXT(L ## "+ Phonon::MMF::%s [0x%08x] " L ## string), _tc.iFunction, _tc.iAddr, args); }
#define TRACE_EXIT_0() { if (_tc.Enabled()) _TRACE_PRINT(_TRACE_TEXT(L ## "- Phonon::MMF::%s [0x%08x]"), _tc.iFunction, _tc.iAddr); }
#define TRACE_EXIT(string, args...) { if (_tc.Enabled()) _TRACE_PRINT(_TRACE_TEXT(L ## "- Phonon::MMF::%s [0x%08x] " L ## string), _tc.iFunction, _tc.iAddr, args); }
#define TRACE_RETURN(string, result) { if (_tc.Enabled()) _TRACE_PRINT(_TRACE_TEXT(L ## "r Phonon::MMF::%s [0x%08x] " L ## string), _tc.iFunction, _tc.iAddr, result); } return result;
#define TRACE_PANIC(code) { _TRACE_PRINT(_TRACE_TEXT(L ## "! Phonon::MMF::%s [0x%08x] panic %d"), _tc.iFunction, _tc.iAddr, code); } Utils::panic(code);
#define TRACE_0(string) { if (_tc.Enabled()) _TRACE_PRINT(_TRACE_TEXT(L ## " Phonon::MMF::%s [0x%08x] " L ## string), _tc.iFunction, _tc.iAddr); }
#define TRACE(string, args...) { if (_tc.Enabled()) _TRACE_PRINT(_TRACE_TEXT(L ## " Phonon::MMF::%s [0x%08x] " L ## string), _tc.iFunction, _tc.iAddr, args); }
#else
#define TRACE_CONTEXT(_fn, _cat)
#define TRACE_ENTRY_0()
#define TRACE_ENTRY(string, args...)
#define TRACE_EXIT_0()
#define TRACE_EXIT(string, args...)
#define TRACE_RETURN(string, result) return result;
#define TRACE_PANIC(code) Utils::panic(code);
#define TRACE_0(string)
#define TRACE(string, args...)
#endif
}
}
QT_END_NAMESPACE
#endif
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