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227 lines
6.8 KiB
C++
227 lines
6.8 KiB
C++
///////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2004, Industrial Light & Magic, a division of Lucas
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// Digital Ltd. LLC
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Industrial Light & Magic nor the names of
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// its contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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///////////////////////////////////////////////////////////////////////////
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#ifndef INCLUDED_IMF_TIME_CODE_H
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#define INCLUDED_IMF_TIME_CODE_H
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//-----------------------------------------------------------------------------
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//
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// class TimeCode
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//
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// A TimeCode object stores time and control codes as described
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// in SMPTE standard 12M-1999. A TimeCode object contains the
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// following fields:
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//
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// Time Address:
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//
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// hours integer, range 0 - 23
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// minutes integer, range 0 - 59
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// seconds integer, range 0 - 59
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// frame integer, range 0 - 29
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//
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// Flags:
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//
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// drop frame flag boolean
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// color frame flag boolean
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// field/phase flag boolean
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// bgf0 boolean
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// bgf1 boolean
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// bgf2 boolean
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//
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// Binary groups for user-defined data and control codes:
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//
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// binary group 1 integer, range 0 - 15
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// binary group 2 integer, range 0 - 15
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// ...
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// binary group 8 integer, range 0 - 15
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//
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// Class TimeCode contains methods to convert between the fields
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// listed above and a more compact representation where the fields
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// are packed into two unsigned 32-bit integers. In the packed
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// integer representations, bit 0 is the least significant bit,
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// and bit 31 is the most significant bit of the integer value.
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//
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// The time address and flags fields can be packed in three
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// different ways:
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//
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// bits packing for packing for packing for
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// 24-frame 60-field 50-field
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// film television television
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//
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// 0 - 3 frame units frame units frame units
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// 4 - 5 frame tens frame tens frame tens
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// 6 unused, set to 0 drop frame flag unused, set to 0
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// 7 unused, set to 0 color frame flag color frame flag
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// 8 - 11 seconds units seconds units seconds units
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// 12 - 14 seconds tens seconds tens seconds tens
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// 15 phase flag field/phase flag bgf0
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// 16 - 19 minutes units minutes units minutes units
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// 20 - 22 minutes tens minutes tens minutes tens
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// 23 bgf0 bgf0 bgf2
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// 24 - 27 hours units hours units hours units
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// 28 - 29 hours tens hours tens hours tens
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// 30 bgf1 bgf1 bgf1
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// 31 bgf2 bgf2 field/phase flag
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//
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// User-defined data and control codes are packed as follows:
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//
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// bits field
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//
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// 0 - 3 binary group 1
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// 4 - 7 binary group 2
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// 8 - 11 binary group 3
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// 12 - 15 binary group 4
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// 16 - 19 binary group 5
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// 20 - 23 binary group 6
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// 24 - 27 binary group 7
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// 28 - 31 binary group 8
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//
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//-----------------------------------------------------------------------------
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namespace Imf {
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class TimeCode
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{
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public:
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//---------------------
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// Bit packing variants
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//---------------------
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enum Packing
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{
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TV60_PACKING, // packing for 60-field television
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TV50_PACKING, // packing for 50-field television
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FILM24_PACKING // packing for 24-frame film
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};
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//-------------------------------------
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// Constructors and assignment operator
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//-------------------------------------
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TimeCode (); // all fields set to 0 or false
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TimeCode (int hours,
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int minutes,
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int seconds,
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int frame,
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bool dropFrame = false,
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bool colorFrame = false,
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bool fieldPhase = false,
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bool bgf0 = false,
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bool bgf1 = false,
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bool bgf2 = false,
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int binaryGroup1 = 0,
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int binaryGroup2 = 0,
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int binaryGroup3 = 0,
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int binaryGroup4 = 0,
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int binaryGroup5 = 0,
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int binaryGroup6 = 0,
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int binaryGroup7 = 0,
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int binaryGroup8 = 0);
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TimeCode (unsigned int timeAndFlags,
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unsigned int userData = 0,
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Packing packing = TV60_PACKING);
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TimeCode (const TimeCode &other);
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TimeCode & operator = (const TimeCode &other);
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//----------------------------
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// Access to individual fields
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//----------------------------
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int hours () const;
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void setHours (int value);
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int minutes () const;
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void setMinutes (int value);
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int seconds () const;
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void setSeconds (int value);
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int frame () const;
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void setFrame (int value);
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bool dropFrame () const;
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void setDropFrame (bool value);
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bool colorFrame () const;
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void setColorFrame (bool value);
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bool fieldPhase () const;
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void setFieldPhase (bool value);
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bool bgf0 () const;
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void setBgf0 (bool value);
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bool bgf1 () const;
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void setBgf1 (bool value);
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bool bgf2 () const;
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void setBgf2 (bool value);
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int binaryGroup (int group) const; // group must be between 1 and 8
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void setBinaryGroup (int group, int value);
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//---------------------------------
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// Access to packed representations
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//---------------------------------
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unsigned int timeAndFlags (Packing packing = TV60_PACKING) const;
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void setTimeAndFlags (unsigned int value,
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Packing packing = TV60_PACKING);
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unsigned int userData () const;
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void setUserData (unsigned int value);
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private:
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unsigned int _time;
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unsigned int _user;
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};
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} // namespace Imf
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#endif
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