fpc/packages/univint/src/CVBase.pas

{
 *  CVBase.h
 *  CoreVideo
 *
 *  Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
 *
 }

{	 Pascal Translation:  Gale R Paeper, <[email protected]>, 2008 }

{
    Modified for use with Free Pascal
    Version 210
    Please report any bugs to <[email protected]>
}

{$mode macpas}
{$packenum 1}
{$macro on}
{$inline on}
{$calling mwpascal}

unit CVBase;
interface
{$setc UNIVERSAL_INTERFACES_VERSION := $0342}
{$setc GAP_INTERFACES_VERSION := $0210}

{$ifc not defined USE_CFSTR_CONSTANT_MACROS}
    {$setc USE_CFSTR_CONSTANT_MACROS := TRUE}
{$endc}

{$ifc defined CPUPOWERPC and defined CPUI386}
	{$error Conflicting initial definitions for CPUPOWERPC and CPUI386}
{$endc}
{$ifc defined FPC_BIG_ENDIAN and defined FPC_LITTLE_ENDIAN}
	{$error Conflicting initial definitions for FPC_BIG_ENDIAN and FPC_LITTLE_ENDIAN}
{$endc}

{$ifc not defined __ppc__ and defined CPUPOWERPC}
	{$setc __ppc__ := 1}
{$elsec}
	{$setc __ppc__ := 0}
{$endc}
{$ifc not defined __i386__ and defined CPUI386}
	{$setc __i386__ := 1}
{$elsec}
	{$setc __i386__ := 0}
{$endc}

{$ifc defined __ppc__ and __ppc__ and defined __i386__ and __i386__}
	{$error Conflicting definitions for __ppc__ and __i386__}
{$endc}

{$ifc defined __ppc__ and __ppc__}
	{$setc TARGET_CPU_PPC := TRUE}
	{$setc TARGET_CPU_X86 := FALSE}
{$elifc defined __i386__ and __i386__}
	{$setc TARGET_CPU_PPC := FALSE}
	{$setc TARGET_CPU_X86 := TRUE}
{$elsec}
	{$error Neither __ppc__ nor __i386__ is defined.}
{$endc}
{$setc TARGET_CPU_PPC_64 := FALSE}

{$ifc defined FPC_BIG_ENDIAN}
	{$setc TARGET_RT_BIG_ENDIAN := TRUE}
	{$setc TARGET_RT_LITTLE_ENDIAN := FALSE}
{$elifc defined FPC_LITTLE_ENDIAN}
	{$setc TARGET_RT_BIG_ENDIAN := FALSE}
	{$setc TARGET_RT_LITTLE_ENDIAN := TRUE}
{$elsec}
	{$error Neither FPC_BIG_ENDIAN nor FPC_LITTLE_ENDIAN are defined.}
{$endc}
{$setc ACCESSOR_CALLS_ARE_FUNCTIONS := TRUE}
{$setc CALL_NOT_IN_CARBON := FALSE}
{$setc OLDROUTINENAMES := FALSE}
{$setc OPAQUE_TOOLBOX_STRUCTS := TRUE}
{$setc OPAQUE_UPP_TYPES := TRUE}
{$setc OTCARBONAPPLICATION := TRUE}
{$setc OTKERNEL := FALSE}
{$setc PM_USE_SESSION_APIS := TRUE}
{$setc TARGET_API_MAC_CARBON := TRUE}
{$setc TARGET_API_MAC_OS8 := FALSE}
{$setc TARGET_API_MAC_OSX := TRUE}
{$setc TARGET_CARBON := TRUE}
{$setc TARGET_CPU_68K := FALSE}
{$setc TARGET_CPU_MIPS := FALSE}
{$setc TARGET_CPU_SPARC := FALSE}
{$setc TARGET_OS_MAC := TRUE}
{$setc TARGET_OS_UNIX := FALSE}
{$setc TARGET_OS_WIN32 := FALSE}
{$setc TARGET_RT_MAC_68881 := FALSE}
{$setc TARGET_RT_MAC_CFM := FALSE}
{$setc TARGET_RT_MAC_MACHO := TRUE}
{$setc TYPED_FUNCTION_POINTERS := TRUE}
{$setc TYPE_BOOL := FALSE}
{$setc TYPE_EXTENDED := FALSE}
{$setc TYPE_LONGLONG := TRUE}
uses MacTypes, CFBase;
{$ALIGN POWER}

 
 {! @header CVBase.h
	@copyright 2004 Apple Computer, Inc. All rights reserved.
	@availability Mac OS X 10.4 or later
    @discussion Here you can find the type declarations for CoreVideo. CoreVideo uses a CVTimeStamp structure to store video display time stamps.
}

{!
    @typedef	CVOptionFlags
    @abstract   Flags to be used for the display and render call back functions.
    @discussion ***Values to be defined***
}
type
	CVOptionFlags = UInt64;

{!
    @struct         CVSMPTETime
    @abstract       A structure for holding a SMPTE time.
    @field          subframes
                        The number of subframes in the full message.
    @field          subframeDivisor
                        The number of subframes per frame (typically 80).
    @field          counter
                        The total number of messages received.
    @field          type
                        The kind of SMPTE time using the SMPTE time type constants.
    @field          flags
                        A set of flags that indicate the SMPTE state.
    @field          hours
                        The number of hourse in the full message.
    @field          minutes
                        The number of minutes in the full message.
    @field          seconds
                        The number of seconds in the full message.
    @field          frames
                        The number of frames in the full message.
}
type
	CVSMPTETime = record
		subframes:       SInt16;
		subframeDivisor: SInt16;
		counter:         UInt32;
		typ:             UInt32;
		flags:           UInt32;
		hours:           SInt16;
		minutes:         SInt16;
		seconds:         SInt16;
		frames:          SInt16;
	end;

{!
    @enum           SMPTE Time Types
    @abstract       Constants that describe the type of SMPTE time.
    @constant       kCVSMPTETimeType24
                        24 Frame
    @constant       kCVSMPTETimeType25
                        25 Frame
    @constant       kCVSMPTETimeType30Drop
                        30 Drop Frame
    @constant       kCVSMPTETimeType30
                        30 Frame
    @constant       kCVSMPTETimeType2997
                        29.97 Frame
    @constant       kCVSMPTETimeType2997Drop
                        29.97 Drop Frame
    @constant       kCVSMPTETimeType60
                        60 Frame
    @constant       kCVSMPTETimeType5994
                        59.94 Frame
}
const
	kCVSMPTETimeType24       = 0;
	kCVSMPTETimeType25       = 1;
	kCVSMPTETimeType30Drop   = 2;
	kCVSMPTETimeType30       = 3;
	kCVSMPTETimeType2997     = 4;
	kCVSMPTETimeType2997Drop = 5;
	kCVSMPTETimeType60       = 6;
	kCVSMPTETimeType5994     = 7;

{!
    @enum           SMPTE State Flags
    @abstract       Flags that describe the SMPTE time state.
    @constant       kCVSMPTETimeValid
                        The full time is valid.
    @constant       kCVSMPTETimeRunning
                        Time is running.
}
const
	kCVSMPTETimeValid   = 1 shl 0;
	kCVSMPTETimeRunning = 1 shl 1;


const
	kCVTimeIsIndefinite = 1 shl 0;

type
	CVTime = record
		timeValue: SInt64;
		timeScale: SInt32;
		flags:     SInt32;
	end;

{!
    @struct CVTimeStamp
    @abstract CoreVideo uses a CVTimeStamp structure to store video display time stamps.
    @discussion This structure is purposely very similar to AudioTimeStamp defined in the CoreAudio framework. 
		Most of the CVTimeStamp struct should be fairly self-explanatory. However, it is probably worth pointing out that unlike the audio time stamps, floats are not used to represent the video equivalent of sample times. This was done partly to avoid precision issues, and partly because QuickTime still uses integers for time values and time scales. In the actual implementation it has turned out to be very convenient to use integers, and we can represent framerates like NTSC (30000/1001 fps) exactly. The mHostTime structure field uses the same Mach absolute time base that is used in CoreAudio, so that clients of the CoreVideo API can synchronize between the two subsystems.
    @field videoTimeScale The scale (in units per second) of the videoTime and videoPeriod values
    @field videoTime This represents the start of a frame (or field for interlaced)
    @field hostTime Host root timebase time
    @field rateScalar This is the current rate of the device as measured by the timestamps, divided by the nominal rate
    @field videoPeriod This is the nominal update period of the current output device
    @field smpteTime SMPTE time representation of the time stamp. 
    @field flags Possible values are:		
		kCVTimeStampVideoTimeValid
		kCVTimeStampHostTimeValid
		kCVTimeStampSMPTETimeValid
		kCVTimeStampVideoPeriodValid
		kCVTimeStampRateScalarValid
		There are flags for each field to make it easier to detect interlaced vs progressive output
		kCVTimeStampTopField
		kCVTimeStampBottomField
		Some commonly used combinations of timestamp flags
		kCVTimeStampVideoHostTimeValid
		kCVTimeStampIsInterlaced
    @field version The current CVTimeStamp is version 0.
    @field reserved Reserved. Do not use.

}
type
	CVTimeStamp = record
		version:            UInt32;		// Currently will be 0.
		videoTimeScale:     SInt32;     // Video timescale (units per second)
		videoTime:          SInt64;		// This represents the start of a frame (or field for interlaced) .. think vsync  - still not 100% sure on the name
		hostTime:           UInt64;		// Host root timebase time
		rateScalar:         Float64;	// Current rate as measured by the timestamps divided by the nominal rate
		videoRefreshPeriod: SInt64;    	// Hint for nominal output rate
		smpteTime:          CVSMPTETime;
		flags:              UInt64;
		reserved:           UInt64;
	end; 

// Flags for the CVTimeStamp structure
const
	kCVTimeStampVideoTimeValid          = 1 shl 0;
	kCVTimeStampHostTimeValid           = 1 shl 1;
	kCVTimeStampSMPTETimeValid          = 1 shl 2;
	kCVTimeStampVideoRefreshPeriodValid = 1 shl 3;
	kCVTimeStampRateScalarValid         = 1 shl 4;
    
    // There are flags for each field to make it easier to detect interlaced vs progressive output
	kCVTimeStampTopField    = 1 shl 16;
	kCVTimeStampBottomField = 1 shl 17;

//	Some commonly used combinations of timestamp flags
const
	kCVTimeStampVideoHostTimeValid = kCVTimeStampVideoTimeValid or kCVTimeStampHostTimeValid;
	kCVTimeStampIsInterlaced       = kCVTimeStampTopField or kCVTimeStampBottomField;

var kCVZeroTime:       CVTime; external name '_kCVZeroTime'; (* attribute const *)
var kCVIndefiniteTime: CVTime; external name '_kCVIndefiniteTime'; (* attribute const *)


end.