smpte.cpp
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- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: smpte.cpp,v 1.4.32.3 2004/07/09 01:48:16 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file,
- * are subject to the current version of the RealNetworks Public
- * Source License (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (the "RCSL") available at
- * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
- * will apply. You may also obtain the license terms directly from
- * RealNetworks. You may not use this file except in compliance with
- * the RPSL or, if you have a valid RCSL with RealNetworks applicable
- * to this file, the RCSL. Please see the applicable RPSL or RCSL for
- * the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the
- * portions it created.
- *
- * This file, and the files included with this file, is distributed
- * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
- * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
- * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
- * ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "hxtypes.h"
- //#include "hlxclib/stdio.h"
- #include "safestring.h"
- #include "hlxclib/stdlib.h"
- #include "hxstring.h"
- #include "smpte.h"
- #include "hxheap.h"
- #ifdef _DEBUG
- #undef HX_THIS_FILE
- static const char HX_THIS_FILE[] = __FILE__;
- #endif
- const UINT32 MSEC_PER_HOUR = (UINT32)60 * 60 * 1000;
- const UINT32 MSEC_PER_MIN = (UINT32)60 * 1000;
- const UINT32 MSEC_PER_SEC = 1000;
- SMPTETimeCode::SMPTETimeCode():
- m_hour(0),
- m_minute(0),
- m_second(0),
- m_frame(0),
- m_mSecs(0),
- m_dropFrame(DROP_FRAME),
- m_framesPerSec(FPS_30)
- {
- }
- SMPTETimeCode::SMPTETimeCode(UINT32 mSec):
- m_mSecs(mSec),
- m_dropFrame(DROP_FRAME),
- m_framesPerSec(FPS_30)
- {
- fromMSec();
- }
- SMPTETimeCode::SMPTETimeCode(int hour, int minute, int second, int frame):
- m_hour(hour),
- m_minute(minute),
- m_second(second),
- m_frame(frame),
- m_dropFrame(DROP_FRAME),
- m_framesPerSec(FPS_30)
- {
- toMSec();
- }
- SMPTETimeCode::SMPTETimeCode(const char* pTimeCodeStr):
- m_dropFrame(DROP_FRAME),
- m_framesPerSec(FPS_30)
- {
- fromString(pTimeCodeStr);
- }
- SMPTETimeCode::SMPTETimeCode(const SMPTETimeCode& lhs)
- {
- m_hour = lhs.m_hour;
- m_minute = lhs.m_minute;
- m_second = lhs.m_second;
- m_frame = lhs.m_frame;
- m_dropFrame = lhs.m_dropFrame;
- m_framesPerSec = lhs.m_framesPerSec;
- m_mSecs = lhs.m_mSecs;
- }
- SMPTETimeCode&
- SMPTETimeCode::operator=(const SMPTETimeCode& lhs)
- {
- m_hour = lhs.m_hour;
- m_minute = lhs.m_minute;
- m_second = lhs.m_second;
- m_frame = lhs.m_frame;
- m_dropFrame = lhs.m_dropFrame;
- m_framesPerSec = lhs.m_framesPerSec;
- m_mSecs = lhs.m_mSecs;
- return *this;
- }
- int
- SMPTETimeCode::compare(const SMPTETimeCode& lhs) const
- {
- return HX_SAFEINT(m_mSecs - lhs.m_mSecs);
- }
- void
- SMPTETimeCode::toMSec()
- {
- m_mSecs = m_hour * MSEC_PER_HOUR
- + m_minute * MSEC_PER_MIN
- + m_second * MSEC_PER_SEC;
- if(m_framesPerSec == FPS_30)
- {
- if(m_frame > 29)
- {
- m_frame = 0;
- }
- else
- {
- if(m_dropFrame == DROP_FRAME)
- {
- // each frame is 33.367 ms (29.97 Hz)
- m_mSecs += (int)(((double)m_frame * 33.367) + 0.5);
- }
- else
- {
- // each frame is 33.333 ms
- m_mSecs += (int)(((double)m_frame * 33.333) + 0.5);
- }
- }
- }
- else if(m_framesPerSec == FPS_25)
- {
- // each frame is 40ms
- if(m_frame > 24)
- {
- m_frame = 0;
- }
- else
- {
- m_mSecs += m_frame * 40;
- }
- }
- }
- void
- SMPTETimeCode::fromMSec()
- {
- int fps = (m_framesPerSec == FPS_30) ? 30: 25;
- UINT32 ttlFrames = (m_mSecs * fps) / 1000;
- m_hour = HX_SAFEINT(ttlFrames / (fps * 60 * 60));
- UINT32 hourRem = ttlFrames - (m_hour * fps * 60 * 60);
- m_minute = HX_SAFEINT(hourRem / (fps * 60));
- UINT32 minRem = hourRem - (m_minute * fps * 60);
- m_second = HX_SAFEINT(minRem / fps);
- UINT32 secRem = minRem - (m_second * fps);
- m_frame = HX_SAFEINT(ttlFrames % fps);
- }
- const char*
- SMPTETimeCode::toString()
- {
- char strBuf[12]; /* Flawfinder: ignore */
- SafeSprintf(strBuf, sizeof(strBuf), "%02d:%02d:%02d",
- m_hour, m_minute, m_second);
- if(m_frame > 0)
- SafeSprintf(&strBuf[8], sizeof(strBuf)-8, ".%02d", m_frame);
- m_asString = strBuf;
- return m_asString;
- }
- void
- SMPTETimeCode::fromString(const char* pTimeCodeString)
- {
- // format is [H]H:[M]M:[S]S[.FF]
- m_hour = m_minute = m_second = m_frame = 0;
- char* token = 0;
- if(pTimeCodeString && strlen(pTimeCodeString) > 0)
- {
- char *tmpStr = new char[strlen(pTimeCodeString)+1];
- strcpy(tmpStr, pTimeCodeString); /* Flawfinder: ignore */
- token = strtok(tmpStr, ":");
- if(token)
- {
- m_hour = HX_SAFEINT(strtol(token, 0, 10));
- token = strtok(NULL, ":");
- if(token)
- {
- m_minute = HX_SAFEINT(strtol(token, 0, 10));
- token = strtok(NULL, ".");
- if(token)
- {
- m_second = HX_SAFEINT(strtol(token, 0, 10));
- token = strtok(NULL, " ");
- if(token)
- {
- m_frame = HX_SAFEINT(strtol(token, 0, 10));
- }
- }
- }
- }
- }
- toMSec();
- fromMSec(); // normalize just in case of a badly formatted string
- }
- SMPTETimeCode::operator UINT32()
- {
- return m_mSecs;
- }
- SMPTETimeCode::operator const char*()
- {
- toString();
- return m_asString;
- }
- SMPTETimeCode&
- SMPTETimeCode::operator+=(const SMPTETimeCode& lhs)
- {
- // no checking for overflow
- m_mSecs += lhs.m_mSecs;
- fromMSec();
- return *this;
- }
- SMPTETimeCode&
- SMPTETimeCode::operator-=(const SMPTETimeCode& lhs)
- {
- // don't go negative on me...
- if(m_mSecs > lhs.m_mSecs)
- {
- m_mSecs -= lhs.m_mSecs;
- }
- else
- {
- m_mSecs = 0;
- }
- fromMSec();
- return *this;
- }
- SMPTETimeCode
- SMPTETimeCode::operator+(const SMPTETimeCode& lhs)
- {
- SMPTETimeCode tCode = *this;
- tCode += lhs;
- return tCode;
- }
- SMPTETimeCode
- SMPTETimeCode::operator-(const SMPTETimeCode& lhs)
- {
- SMPTETimeCode tCode = *this;
- tCode -= lhs;
- return tCode;
- }