Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// File: quicktime_common.h
//
// QuickTime limits and constants shared among all QuickTime functions
//
//=============================================================================
#ifndef QUICKTIME_COMMON_H
#define QUICKTIME_COMMON_H
#ifdef _WIN32
#pragma once
#endif
#ifdef OSX
// The OSX 10.7 SDK dropped support for the functions below, so we manually pull them in
#include <dlfcn.h>
typedef PixMapHandle
(*PFNGetGWorldPixMap)(GWorldPtr offscreenGWorld);
typedef Ptr
(*PFNGetPixBaseAddr)(PixMapHandle pm);
typedef Boolean
(*PFNLockPixels)(PixMapHandle pm);
typedef void
(*PFNUnlockPixels)(PixMapHandle pm);
typedef void
(*PFNDisposeGWorld)(GWorldPtr offscreenGWorld);
typedef void
(*PFNSetGWorld)(CGrafPtr port,GDHandle gdh);
typedef SInt32
(*PFNGetPixRowBytes)(PixMapHandle pm);
extern PFNGetGWorldPixMap GetGWorldPixMap;
extern PFNGetPixBaseAddr GetPixBaseAddr;
extern PFNLockPixels LockPixels;
extern PFNUnlockPixels UnlockPixels;
extern PFNDisposeGWorld DisposeGWorld;
extern PFNSetGWorld SetGWorld;
extern PFNGetPixRowBytes GetPixRowBytes;
#endif
// constant that define the bounds of various inputs
static const int cMinVideoFrameWidth = 16;
static const int cMinVideoFrameHeight = 16;
static const int cMaxVideoFrameWidth = 2 * 2048;
static const int cMaxVideoFrameHeight = 2 * 2048;
static const int cMinFPS = 1;
static const int cMaxFPS = 600;
static const float cMinDuration = 0.016666666f; // 1/60th second
static const float cMaxDuration = 3600.0f; // 1 Hour
static const int cMinSampleRate = 11025; // 1/4 CD sample rate
static const int cMaxSampleRate = 88200; // 2x CD rate
#define NO_MORE_INTERESTING_TIMES -2
#define END_OF_QUICKTIME_MOVIE -1
// ===========================================================================
// Macros & Utility functions
// ===========================================================================
#define SAFE_DISPOSE_HANDLE( _handle ) if ( _handle != nullptr ) { DisposeHandle( (Handle) _handle ); _handle = nullptr; }
#define SAFE_DISPOSE_GWORLD( _gworld ) if ( _gworld != nullptr ) { DisposeGWorld( _gworld ); _gworld = nullptr; }
#define SAFE_DISPOSE_MOVIE( _movie ) if ( _movie != nullptr ) { DisposeMovie( _movie ); ThreadSleep(10); Assert( GetMoviesError() == noErr ); _movie = nullptr; }
#define SAFE_RELEASE_AUDIOCONTEXT( _cxt ) if ( _cxt != nullptr ) { QTAudioContextRelease( _cxt ); _cxt = nullptr; }
#define SAFE_RELEASE_CFREF( _ref ) if ( _ref != nullptr ) { CFRelease( _ref ); _ref = nullptr; }
// Utility functions
extern char *COPY_STRING( const char *pString );
bool MovieGetStaticFrameRate( Movie inMovie, VideoFrameRate_t &theFrameRate );
bool SetGWorldDecodeGamma( CGrafPtr theGWorld, VideoPlaybackGamma_t gamma );
bool CreateMovieAudioContext( bool enableAudio, Movie inMovie, QTAudioContextRef *pAudioConectext, bool setVolume = false, float *pCurrentVolume = nullptr );
VideoPlaybackGamma_t GetSystemPlaybackGamma();
//-----------------------------------------------------------------------------
// Computes a power of two at least as big as the passed-in number
//-----------------------------------------------------------------------------
static inline int ComputeGreaterPowerOfTwo( int n )
{
int i = 1;
while ( i < n )
{
i <<= 1;
}
return i;
}
#endif // QUICKTIME_COMMON_H