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229 lines
9.1 KiB
Plaintext
229 lines
9.1 KiB
Plaintext
//------------------------------------------------------------------------------
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// File: MedParam.idl
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//
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// Desc: Definition of the IMediaParams and associated interfaces. These
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// interfaces are designed to allow communication of curve-following
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// behaviors for parameters of objects which require dynamic changes
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// to their parameters at run time. All changes are specified by
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// timestamp and curve type to ensure the parameters can be set
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// at sufficient accuracy with predictable behavior on subsequent
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// playback of the same curves.
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//
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// Copyright (c) 1999 - 2002, Microsoft Corporation. All rights reserved.
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//------------------------------------------------------------------------------
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import "oaidl.idl";
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import "ocidl.idl";
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import "strmif.idl";
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//------------------------------------------------------------------------------
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// Define the semantic type to be used for each parameter. All values passed
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// into this interface are 32-bit floats, but the interface can specify that
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// the values must be integer, booleans, or enumerated types
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//------------------------------------------------------------------------------
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typedef float MP_DATA; // All data is 32-bit floats
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typedef enum _MP_Type {
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MPT_INT, // data is signed 23 bit integer (mantissa)
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MPT_FLOAT, // data is 32bit IEEE float
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MPT_BOOL, // data is true or false (using ANSI C++ definition)
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MPT_ENUM, // data is a set (represented by consecutive integers)
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MPT_MAX,
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} MP_TYPE;
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const MP_DATA MPBOOL_TRUE = 1.0; // Value of true
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const MP_DATA MPBOOL_FALSE = 0.0; // Value of false
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//------------------------------------------------------------------------------
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// Define the types of curves which are supported
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//------------------------------------------------------------------------------
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typedef enum _MP_CURVE_TYPE {
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MP_CURVE_JUMP = 0x0001, // No interpolation, just jump to next point
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MP_CURVE_LINEAR = 0x0002, // Linear interpolation (y follows x from 0.0 to 1.0)
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MP_CURVE_SQUARE = 0x0004, // y follow x^2 from 0.0 to 1.0
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MP_CURVE_INVSQUARE = 0x0008, // y follows 1-(x^2) from 0.0 to 1.0
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MP_CURVE_SINE = 0x0010, // y follows sin(x) from -pi/2 to pi/2
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} MP_CURVE_TYPE;
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//------------------------------------------------------------------------------
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// Capability bits. Used by the object to specify what capabilities it has.
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//------------------------------------------------------------------------------
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typedef DWORD MP_CAPS;
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// Curve capabilities - If the cap bit is set, that type of curve is supported
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const MP_CAPS MP_CAPS_CURVE_JUMP = MP_CURVE_JUMP;
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const MP_CAPS MP_CAPS_CURVE_LINEAR = MP_CURVE_LINEAR;
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const MP_CAPS MP_CAPS_CURVE_SQUARE = MP_CURVE_SQUARE;
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const MP_CAPS MP_CAPS_CURVE_INVSQUARE = MP_CURVE_INVSQUARE;
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const MP_CAPS MP_CAPS_CURVE_SINE = MP_CURVE_SINE;
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//------------------------------------------------------------------------------
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// Structure used to return information about the type and limits of a parameter
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//------------------------------------------------------------------------------
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typedef struct _MP_PARAMINFO {
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MP_TYPE mpType; // One of MP_TYPE_xxx codes
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MP_CAPS mopCaps; // A collection of MP_CAPS flags
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// Minimum and maximum values
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MP_DATA mpdMinValue; // minimum legal value
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MP_DATA mpdMaxValue; // maximum legal value
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MP_DATA mpdNeutralValue; // default or 'center' value
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// Defualt Unit and Label text. These strings will ALWAYS be English
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// strings in the UNICODE character set. For international text
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// use the GetParamText member function
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WCHAR szUnitText[32]; // units of the parameter
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WCHAR szLabel[32]; // name of the parameter
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} MP_PARAMINFO;
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//------------------------------------------------------------------------------
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// Parameter Index types
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//------------------------------------------------------------------------------
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typedef DWORD DWORD;
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const DWORD DWORD_ALLPARAMS = -1; // Apply this operation to all params
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//------------------------------------------------------------------------------
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// Defined list of timestamp types
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//------------------------------------------------------------------------------
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typedef DWORD MP_TIMEDATA; // Extra data to further define type
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// REFERENCE_TIME (1 tick = 100 nanoseconds, MP_TIMEDATA ignored)
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cpp_quote("DEFINE_GUID(GUID_TIME_REFERENCE,")
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cpp_quote("0x93ad712b, 0xdaa0, 0x4ffe, 0xbc, 0x81, 0xb0, 0xce, 0x50, 0xf, 0xcd, 0xd9);")
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// Music Time (MP_TIMEDATA = parts/quarter note)
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cpp_quote("DEFINE_GUID(GUID_TIME_MUSIC,")
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cpp_quote("0x574c49d, 0x5b04, 0x4b15, 0xa5, 0x42, 0xae, 0x28, 0x20, 0x30, 0x11, 0x7b);")
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// Time is measures in samples. MP_TIMEDATA = Samples/sec)
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cpp_quote("DEFINE_GUID(GUID_TIME_SAMPLES,")
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cpp_quote("0xa8593d05, 0xc43, 0x4984, 0x9a, 0x63, 0x97, 0xaf, 0x9e, 0x2, 0xc4, 0xc0);")
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//------------------------------------------------------------------------------
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// The value of a given parameter at a specific point in time
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//------------------------------------------------------------------------------
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typedef DWORD MP_FLAGS;
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const MP_FLAGS MPF_ENVLP_STANDARD = 0x0000; // Use all data provided
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const MP_FLAGS MPF_ENVLP_BEGIN_CURRENTVAL = 0x0001;
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// Ignore valStart value, use current value as the staring point
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const MP_FLAGS MPF_ENVLP_BEGIN_NEUTRALVAL = 0x0002;
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// Ignore valStart value, use neutral value as the staring point
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typedef struct _MP_ENVELOPE_SEGMENT {
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REFERENCE_TIME rtStart; // Start time in current time format
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REFERENCE_TIME rtEnd; // End time in current time format
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MP_DATA valStart; // Initial Value
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MP_DATA valEnd; // Final Value
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MP_CURVE_TYPE iCurve; // One of MP_CURVE_TYPE codes
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MP_FLAGS flags; // Special cases
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} MP_ENVELOPE_SEGMENT;
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//------------------------------------------------------------------------------
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// Define flags for Punch-in timing
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//------------------------------------------------------------------------------
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const MP_FLAGS MPF_PUNCHIN_REFTIME = 0; // Use the reference time as the PI time
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const MP_FLAGS MPF_PUNCHIN_NOW = 0x0001; // Punch in at the current clock time
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const MP_FLAGS MPF_PUNCHIN_STOPPED = 0x0002; // Return change notifications during
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// author time
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//------------------------------------------------------------------------------
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// IMediaParamInfo - Interface used to determine the names, data types and
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// units of the parameters which are exposed by the object. This interface
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// is used at discovery time, and is not required during run-time since the
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// objects parameters are a fixed set and this data can be cached by the
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// calling applicaiton.
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//------------------------------------------------------------------------------
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[
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object,
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uuid(6d6cbb60-a223-44aa-842f-a2f06750be6d),
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version(1.0)
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]
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interface IMediaParamInfo : IUnknown
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{
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HRESULT GetParamCount (
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[out] DWORD * pdwParams
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);
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HRESULT GetParamInfo (
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[in] DWORD dwParamIndex,
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[out] MP_PARAMINFO * pInfo
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);
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// returns a series of null terminated strings. strings are in the
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// following order:
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// Param Label, Units Text, 1st Enum Text, 2nd Enum Text, etc...
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HRESULT GetParamText (
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[in] DWORD dwParamIndex, // which param to get text for
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[out] WCHAR **ppwchText // returns ptr to CoTaskMemAlloc'd string
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);
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// Returns the number of diffrent time formats this object understands
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HRESULT GetNumTimeFormats (
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[out] DWORD * pdwNumTimeFormats
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);
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// Returns the GUID for the ith supported time format
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HRESULT GetSupportedTimeFormat(
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[in] DWORD dwFormatIndex,
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[out] GUID *pguidTimeFormat
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);
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// Returns the current time format
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HRESULT GetCurrentTimeFormat (
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[out] GUID *pguidTimeFormat,
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[out] MP_TIMEDATA *pTimeData
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);
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}
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//------------------------------------------------------------------------------
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// IMediaParams - Interfaes used to actually set the media params and the
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// envelopes to follow
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//------------------------------------------------------------------------------
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[
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object,
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uuid(6d6cbb61-a223-44aa-842f-a2f06750be6e),
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version(1.0)
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]
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interface IMediaParams : IUnknown
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{
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// Single param Get/Set methods
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HRESULT GetParam (
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[in] DWORD dwParamIndex,
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[out] MP_DATA *pValue
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);
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HRESULT SetParam (
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[in] DWORD dwParamIndex,
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[in] MP_DATA value
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);
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// Envelope methods (param change over time)
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HRESULT AddEnvelope (
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[in] DWORD dwParamIndex,
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[in] DWORD cSegments,
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[in] MP_ENVELOPE_SEGMENT * pEnvelopeSegments
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);
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// Flush all of the envelope information for the given paramter between
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// the timestamps specified
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HRESULT FlushEnvelope (
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[in] DWORD dwParamIndex,
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[in] REFERENCE_TIME refTimeStart,
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[in] REFERENCE_TIME refTimeEnd
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);
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// Change the time format being used by the object
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HRESULT SetTimeFormat (
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[in] GUID guidTimeFormat,
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[in] MP_TIMEDATA mpTimeData
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);
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}
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