smlprstime.cpp

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: smlprstime.cpp,v 1.2.12.1 2004/07/09 01:58:02 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
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 * to use your version of this file under the terms of either the RPSL
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 * 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
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 * ***** END LICENSE BLOCK ***** */

// system
#include <time.h>
#ifdef _UNIX
#include <ctype.h>
#endif
// include
#include "hxtypes.h"
#include "hxwintyp.h"
#include "hxcom.h"
#include "hxxml.h"
#include "smiltype.h"
// pncont
#include "hxstring.h"
#include "hxslist.h"
// pnmisc
#include "nptime.h"
#include "smpte.h"
#include "hxwinver.h"
// rnxmllib
#include "hxxmlprs.h"
// rmasmil
#include "smlerror.h"
#include "smlparse.h"
#include "smlelem.h"
#include "smlprstime.h"
// pndebug
#include "hxheap.h"
#ifdef _DEBUG
#undef HX_THIS_FILE		
static const char HX_THIS_FILE[] = __FILE__;
#endif

SmilTimeValue::SmilTimeValue(IUnknown* pContext, UINT32 ulStartLine,
			     CSmilElement* pElement)
: m_pContext(pContext)
, m_pElement(pElement)
, m_ulStartLine(ulStartLine)
, m_type(SmilTimeNone)
, m_position(SMILEventSourceEnd)
, m_uRepeatIteration(0)
, m_bTreatSyncArcAsEvent(FALSE)
, m_lOffset(0)
, m_lOriginalOffset(0)
, m_year(-1)
, m_month(-1)
, m_day(-1)
, m_hour(0)
, m_min(0)
, m_sec(0)
, m_ms(0)
, m_UTCOffsetMin(0)
, m_bRelativeToUTC(FALSE)
, m_pszMarkerName(NULL)
, m_bIsExternalMarker(FALSE)
, m_pszExternalMarkerFileName(NULL)
, m_pszExternalMarkerName(NULL)
, m_ulMarkerTime(0)
, m_bUsedToBeMediaMarker(FALSE)
, m_pEventName(NULL)
, m_bTimeIsResolved(FALSE)
, m_lResolvedToTime(SMILTIME_INFINITY)
, m_lWhenTimeWasResolved(SMILTIME_INFINITY)
, m_lTimeOfPause(SMILTIME_INFINITY)
{
    m_pContext->AddRef();
}

SmilTimeValue::~SmilTimeValue()
{
    HX_RELEASE(m_pContext); // /fixes mem leak.
    HX_VECTOR_DELETE(m_pszMarkerName);
    HX_VECTOR_DELETE(m_pszExternalMarkerFileName);
    HX_VECTOR_DELETE(m_pszExternalMarkerName);
    HX_VECTOR_DELETE(m_pEventName);
}

// /This returns the resolved time, including any positive offset,
// and includes only the part of a negative offset that is after
// the resolved-AT time (which is m_lWhenTimeWasResolved).  In other
// words, this returns the time at which the element will actually
// begin or end based on this SmilTimeValue:
//
// Returns HXR_OK if resolved time is returned in lEffectiveResolveTime,
// else returns HXR_FAILED.
HX_RESULT
SmilTimeValue::getEffectiveResolvedTime(REF(INT32) lEffectiveResolvedTime)
{
    HX_RESULT retval = HXR_OK;
    lEffectiveResolvedTime = SMILTIME_NEGATIVE_INFINITY;
    switch (m_type)
    {
	case SmilTimeSyncBase:
#if defined(ENABLE_SYNC_TO_PREV)
	case SmilTimeSyncToPrev:
#endif
	case SmilTimeMediaMarker:
	case SmilTimeEvent:
	{
	    if (isTimeResolved())
	    {
		// /EH- the following should *always* be true:
		HX_ASSERT(m_lResolvedToTime >= m_lWhenTimeWasResolved);
		// /Note: resolvedToTime doesn't include offset:
		lEffectiveResolvedTime = m_lResolvedToTime;
#define XXXEH_OFFSET_NOT_ALREADY_ACCOUNTED_FOR
#if defined(XXXEH_OFFSET_NOT_ALREADY_ACCOUNTED_FOR)
		if (SmilTimeEvent == m_type
			// /XXXEH- TODO: handle SmilTimeMediaMarker here, too,
			// if and when we get internal markers (event-like
			// ones) working:
			||  (isSyncBaseTimeVal()  &&  m_bTreatSyncArcAsEvent))
		{
		    INT32 lEffectiveOffset = m_lOffset;
		    if (lEffectiveOffset < 0)
		    {
			lEffectiveOffset = m_lWhenTimeWasResolved -
				m_lResolvedToTime;
			if (lEffectiveOffset < m_lOffset)
			{
			    // /Resolved-at time was well before resolved-to
			    // time minus |offset|, so the entire offset is
			    // used:
			    lEffectiveOffset = m_lOffset;
			}
		    }
		    lEffectiveResolvedTime += lEffectiveOffset;
		}
#endif
	    }
	    else
	    {
		retval = HXR_FAILED;
	    }
	}
	break;

	// /XXXEH- TODO: figure out how to handle wallclock; I think
	// it should just work the same as clock values:
	case SmilTimeWallclock:
	case SmilTimeClockValue:
	case SmilTimeOffset:
	{
	    if (isTimeResolved())
	    {
		lEffectiveResolvedTime = m_lOffset;
	    }
	    else
	    {
		retval = HXR_FAILED;
		// /All wallclock, clock, and offset values should have
		// been set as resolved at parse time:
		HX_ASSERT(isTimeResolved());
	    }
	}
	break;

	default:
	{
	    retval = HXR_FAILED;
	}
	break;
    }
    return retval;
}


HX_RESULT
SmilTimeValue::parseValue(const char* pPos,
			  SMILSyncAttributeTag nTag,
			  // /Needed for self-references:
			  const char* pThisElementID)
{
    HX_RESULT ret = HXR_OK;

    if (pPos == (const char*)NULL)
    {
	ret = HXR_FAIL;
    }
    else if (*pPos == '+' || *pPos == '-')
    {
	HX_ASSERT(nTag == SMILSyncAttrBegin);
	if (nTag == SMILSyncAttrBegin)
	{
	    ret = parseOffset(pPos);
	    m_type = SmilTimeOffset;
	    if (SUCCEEDED(ret))
	    {
		m_bTimeIsResolved = TRUE;
	    }
	}
	else
	{
	    CSmilSMILSyntaxErrorHandler errHandler(m_pContext);
	    errHandler.ReportError(SMILErrorBadTimeValue, pPos, 
		m_ulStartLine);
	    return ret;
	}
    }
    else if (isdigit(*pPos)
	// /Fixes PR 42592:
	// "0.5s" was OK but ".5s" was being treated as unresolved:
	||  '.' == *pPos)
    {
	ret = parseOffset(pPos);
	if (SUCCEEDED(ret))
	{
	    m_bTimeIsResolved = TRUE;
	}

	// this is actually a Clock Value if it is an end
	// time.
	if (nTag == SMILSyncAttrBegin)
	{
	    m_type = SmilTimeOffset;
	}
	else // nTag == SMILSyncAttrEnd
	{
	    m_type = SmilTimeClockValue;
	}
    }
#if defined(ENABLE_SYNC_TO_PREV)
    else if (strncmp(pPos, "prev", 4) == 0)
    {
	// syncToPrev-value
	ret = parseSyncToPrev(pPos);
    }
#endif
    else if (strncmp(pPos, "wallclock", 9) == 0)
    {
	// wallclock-sync-value
	ret = parseWallClockValue(pPos);
    }
    else
    {
	const char* pDotPos = NULL;
	BOOL bEscape = FALSE;

	UINT32 len = strlen(pPos);
	char* idref = new char [len+1];
	char* idrefPos = idref;
	*idrefPos = '\0';
	char* command = new char [len+1];
	char* commandPos = command;
	*commandPos = '\0';

	const char* pOffset = NULL;

	enum { IDREF, ESCAPE, COMMAND, END, OFFSET } state = IDREF;

	const char* pBegin = pPos;

	while (*pPos)
	{
	    switch (state)
	    {
	    case ESCAPE:
		*idrefPos++ = *pPos;
		state = IDREF;
		break;
	    case IDREF:
		if (*pPos == '\\')
		{
		    // /Don't include escape char in idref; go to next char:
		    state = ESCAPE;
		}
		else if (*pPos == '.')
		{
		    *idrefPos = '\0';
		    state = COMMAND;
		}
		else if (isspace(*pPos))
		{
		    *idrefPos = '\0';
		    state = END;
		}
		else if (*pPos == '+' || *pPos == '-')
		{
		    *idrefPos++ = '\0';
		    pOffset = pPos;
		    state = OFFSET;
		}
		else
		{
		    *idrefPos++ = *pPos;
		}
		break;
	    case COMMAND:
	        if (isspace(*pPos))
		{
		    *commandPos = '\0';
		    state = END;
		}
		else if (*pPos == '+' || *pPos == '-')
		{
		    pOffset = pPos;
		    *commandPos = '\0';
		    state = OFFSET;
		}
		else
		{
		    *commandPos++ = *pPos;
		}
		break;
	    case END:
		if (*pPos == '+' || *pPos == '-')
		{
		    pOffset = pPos;
		    state = OFFSET;
		}
		break;
	    case OFFSET:
		break;
	    }
	    ++pPos;
	}

	if (state == COMMAND)
	{
	    *commandPos = '\0';
	}
	else if (state == IDREF || state == ESCAPE)
	{
	    *idrefPos = '\0';
	}

        // XXXMEH - if this is an animation element, then we
        // will handle the ".repeat(x)" syntax differently than
        // we treat sources. We will treat ".repeat(x)" as an
        // event rather than a sync-arc.
        BOOL bIsAnimate = FALSE;
        if (m_pElement && m_pElement->m_pNode &&
            (m_pElement->m_pNode->m_tag == SMILAnimate       ||
             m_pElement->m_pNode->m_tag == SMILSet           ||
             m_pElement->m_pNode->m_tag == SMILAnimateMotion ||
             m_pElement->m_pNode->m_tag == SMILAnimateColor))
        {
            bIsAnimate = TRUE;
        }
	if (*command == '\0')
	{
	    // /The SMIL Boston draft supports the fact that the name of the
	    // event ("Event-symbol") is required and is what is used when
	    // no "Eventbase-element." precedes it.  Thus, we need to
	    // treat the idref as the command string and use this 
	    // element's id for the idref:
	    // /HOWEVER, for PR 69849 (needed for PR 58290) fix, if event is
	    // "accesskey(...)", then the event is not self-generated and is
	    // not raised for another element, so give it a fake id here so
	    // special-case code isn't needed in multiple places, elsewhere:
	    if (!strncmp(idref, "accesskey(", 10))
	    {
		ret = parseEvent(
			// /Use this string (an invalid XML id) as the fake ID:
			ACCESSKEY_EVENT_FAKE_ID_STRING, // /fake ID.
			idref, // /<==actually the command (i.e., Event-symbol)
			pOffset);
	    }
	    else
	    {
		ret = parseEvent(pThisElementID,
			idref, // /<==actually the command (i.e., Event-symbol)
			pOffset);
	    }
	}
	else if (strcmp(command, "begin") == 0 ||
#if defined(XXXEH_REPEAT_VALUE_TIMING_SHOULD_BE_EVENT_BASED)
#else
		((0 == strncmp(command, "repeat(", 7)) && !bIsAnimate)  ||
#endif
		 strcmp(command, "end") == 0)
	{
			// base, memeber, offset
	    ret = parseSyncBase(idref, command, pOffset);
	}
	else if (strncmp(command, "marker(", 7) == 0)
	{
	    ret = parseMarker(idref, command, pOffset);
	}
	else // /everything else is an event (i.e., "Event-symbol") name:
	{
	    ret = parseEvent(idref, command, pOffset);
	}

	HX_VECTOR_DELETE(command);
	HX_VECTOR_DELETE(idref);
    }

    // /We need to make sure we set scheduled time values' resolved-to times
    // in case these times are used AFTER the element has already begun
    // playing or finished playing:
    if (SmilTimeOffset == m_type   || 
	SmilTimeClockValue == m_type  ||
	SmilTimeWallclock == m_type)
    {
	setResolvedToTime(0);
	setWhenTimeWasResolved(0);
    }

    return ret;
}

HX_RESULT
SmilTimeValue::setTimeOffset(time_t tRefTime)
{
    HX_RESULT ret = HXR_OK;
    if (m_type == SmilTimeWallclock)
    {
	struct tm ourtime;

	ourtime.tm_sec = m_sec; 
	ourtime.tm_min = m_min;
	ourtime.tm_hour = m_hour;
	if (m_day != -1 && m_year != -1 && m_month != -1)
	{
	    ourtime.tm_mday = m_day;
	    // /tm::tm_mon is 0-based, while m_month is 1-based, so we need
	    // to subtract 1 (and our parser already made sure m_month is
	    // greater than 0 and less than 13):
	    ourtime.tm_mon = m_month - 1;
	    ourtime.tm_year = m_year - 1900;
	}
	else
	{
	    time_t thetime;
	    time(&thetime);
	    struct tm* cur;
	    cur = localtime(&thetime);
	    ourtime.tm_mday = cur->tm_mday;
	    ourtime.tm_mon = cur->tm_mon;
	    ourtime.tm_year = cur->tm_year;
	    ourtime.tm_isdst = cur->tm_isdst;