CN100414497C - Method of generating close command and automatic close in shockwave formatted file - Google Patents
Method of generating close command and automatic close in shockwave formatted file Download PDFInfo
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- CN100414497C CN100414497C CNB200510056112XA CN200510056112A CN100414497C CN 100414497 C CN100414497 C CN 100414497C CN B200510056112X A CNB200510056112X A CN B200510056112XA CN 200510056112 A CN200510056112 A CN 200510056112A CN 100414497 C CN100414497 C CN 100414497C
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Abstract
The present invention discloses an implementation method for automatically closing a shake wave format file. In the present invention, a cartoon with the longest playing time is determined in a main cartoon and a sub cartoon by passing through all tag blocks in the shake wave format(SWF) file; a script tag block containing play stop and an SWF file close command is inserted between the last display frame tag block of the cartoon with the longest playing time and the tag block which is previous to the last display frame tag block; the SWF file is read to play the cartoon, and the command in the script tag block is executed after the last frame of the cartoon with the longest playing time finishes being played; then the cartoon is automatically stopped being played and the SWF file is shut down. The present invention also discloses a method for generating an automatic close command in an SWF file.
Description
Technical field
The present invention relates to the file processing technology in computing machine and the communication technical field, relate in particular to that a kind of (Shockwave format SWF) generates shutdown command and close the implementation method of SWF file automatically in the file at the SWF form.
Background technology
In instant messaging (IM) software, the Flash technology is used more and more widely, shows the animation expression for example for the other side good friend, and the personal virtual image becomes application such as dynamic animation from still image.In these application based on Flash, application program often needs to capture exactly a SWF form (Shockwave format, SWF) moment of finishing of file, and close this Swf file after animation plays automatically.
The Swf file layout is made up of header information and data message.Header information comprises plays the more needed public informations of this Swf file, as: whether compress, version information, viewing area, totalframes and frame per second etc.Data division is made up of several tag block (Tag) order, and each tag block all is made up of tag types (TagID abbreviates Tid as), tag block length and tag block data three parts.At last with the end mark of an end (End) tag block (Tid=0) as whole Swf file.
All tag block are divided into two big classes: definition tag block (Definition tag) and control tag block (Control tag).
Each definition tag block all defines an object (Character), and distributes the sign that the overall situation is unique for each object-order, is called object ID (CharacterID abbreviates Cid as).The definition tag block mainly contains two types: a kind of is shape definition (DefineShape2) tag block (Tid=22), and it is responsible for defining body form, for example, defines a circle or rectangle, and is Cid of this object distribution; Another kind is sub-animation definition (DefineSprite) tag block (Tid=39), and it is responsible for defining a sub-animation and for this sub-animate object distributes a Cid, also indicates the frame number (FrameCount is called for short FC) that this sub-animation comprises simultaneously.The tag block data of sub-animation definition tag block are made up of one group of nested subtab piece again, but this organize nested subtab piece and can only control tag block by several and form, can not comprise any definition tag block.Sub-animation definition is the equal of initiatively to draw the sub-animation of giving a definition, and like this, initiatively picture and sub-animation can broadcast simultaneously with certain frame per second.
The control tag block mainly is responsible for the control of operation, and mainly contain four types: first kind is display frame (ShowFrame) tag block (Tid=1), and function is to show present frame.In the Swf player, respectively be provided with a display list (Display list) for initiatively drawing with each sub-animation, display list is made up of the array of one two tuple, each two tuple be (Lid, Cid), Lid is the abbreviation of LayerID, be the number of plies, two tuples are illustrated in the object that display object on the Lid layer is designated Cid, and each layer can only be placed an object, and when showing, the object that is placed on the upper strata is placed on covering the object of lower floor.The display frame tag block is exactly that the current content in the display list is all shown according to hierarchical relationship.Second kind is placing objects (PlaceObject2) tag block (Tid=26), this control command indicates a Lid and a Cid, be illustrated in the display list increase by one two tuple (Lid, Cid), but do not show, wait until that just follow-up display frame tag block just shows when occurring.The third is to shift out object (RemoveObject2) tag block (Tid=28), and with placing objects tag block functions reversed, this order indicates a Lid, is illustrated in two tuples of removing Lid layer place in the display list.Like this, when follow-up display frame tag block occurs, the object of Lid layer in the display list more not just.
The 4th kind is script tag piece (Tid=12), and it carries out some special controls by script command to broadcast, for example begins to play, stops to play, jump to next frame, gets the uniform resource locator (URL) of appointment etc.Player not only all generates a display list for each sub-animation (comprise initiatively and drawing), simultaneously, also is that each sub-animation generates a script listing (action list).When player is separated when reading a script tag piece, script command is put into the script listing of corresponding sub-animation, do not carry out these script commands at once, but wait until that a nearest display frame (ShowFrame) is when tag block occurs, just disposablely execute script commands all in the script listing, afterwards, the more current content in the display list is all shown according to hierarchical relationship.
When playing a Swf file, the timeline of initiatively drawing the place is called main timeline, and the timeline at sub-animation place is called period of the day from 11 p.m. to 1 a.m top-stitching.Main timeline and period of the day from 11 p.m. to 1 a.m top-stitching are independently of one another.Timeline only depends on display frame (ShowFrame) tag block, player is during whenever to a display frame tag block, the time that the current time line then is described has marched forward a unit interval, and content displayed is determined by placing objects (PlaceObject2) tag block in certain unit interval.
The tag block of Swf file and initiatively draw, the timeline notion of sub-animation as shown in Figure 1, Fig. 1 has described a Swf file and how to have organized by a plurality of tag block (Tag) for containing the Swf file of 4 sub-animations (Tid=39) among the figure.Fig. 2 has described Swf file shown in Figure 1 and has initiatively drawn timeline notion with sub-animation.
Among Fig. 1, Tid=39 represents sub-animation definition (DefineSprite) tag block, and Cid is the unique object ID of the defined overall situation of this tag block, and FC (FrameCount) is the frame number of this sub-animation, the number of display frame tag block in the promptly sub-animation.Tid=26, expression placing objects (PlaceObject2) tag block (, therefore, in Fig. 1, only showing the object ID that the placing objects tag block is placed) because the layer definition in the present invention and the display list is irrelevant.Fig. 2 has illustrated how same Swf file is described with the notion of timeline.The timeline notion is also stated the placing objects tag block (Tid=26) that has influence on period of the day from 11 p.m. to 1 a.m top-stitching in the drawings for convenience of explanation.The corresponding timeline independently of sub-animation, the period of the day from 11 p.m. to 1 a.m top-stitching i among the figure is the sub-animation definition tag block (Tid=39) of i corresponding to Cid.
Swf file player (Flash player) reads the Swf file content and according to the file content playing flash, closes this Swf file automatically after capturing the moment that a Swf (Shockwave format) file finishes.
At present, the method of closing the Swf file automatically mainly is to utilize the making software of Flash " MacromediaFlash MX ", in last display frame tag block (Tid=1) of initiatively drawing before, add a script tag piece (Tid=12), comprised the order that stops to play and closing the Swf file in this script tag piece, as shown in Figure 3.
But in the Swf file, initiatively the longest one in the often not all timeline of drawing of timeline (comprising period of the day from 11 p.m. to 1 a.m top-stitching), promptly initiatively to draw when being played to last frame, possible its sub-animation is not also finished.As shown in Figure 3, before the last frame of initiatively drawing, insert a script tag that stops to play, when player is carried out the last frame of initiatively drawing (Tid=1), will stop to play and closing this Swf file, at this moment, may also have sub-animation also not finish.Therefore, be longer than under the situation of initiatively drawing timeline, close the Swf file automatically by prior art and will cause the Swf file intactly not broadcasted at sub-animation time line.
Summary of the invention
The invention provides a kind of implementation method that in the SWF file, generates automatic shutdown command and close the SWF file automatically, utilize prior art to generate the SWF file that to close automatically with solution, be longer than the problem that exists this document intactly not broadcasted under the Swf file situation of initiatively drawing timeline at the sub-animation time line of broadcast.
For addressing the above problem, the invention provides following technical scheme:
A kind of method that in the SWF file, generates automatic shutdown command, described SWF file comprises the data message of being made up of in order tag block, described tag block can comprise the definition tag block that defines sub-animation and control is initiatively drawn and the control tag block of sub-animation operation, and this control tag block comprises display frame tag block and placing objects tag block; This method comprises the steps:
(1) the definition tag block of traversal in the described SWF formatted file determines whether that definition has sub-animation, if, then carry out step (2), otherwise be the longest animation of reproduction time with the active paintings, continue step (4);
(2) the definition tag block of the described SWF formatted file of traversal and control tag block, obtain all sub-animations definition information and placing objects information, and the starting point time of determining in the whole absolute time of playing described SWF formatted file, to play each sub-animation according to described definition information and placing objects information;
(3) calculate the time span of playing active picture and each sub-animation according to described starting point time and frame number that each animation comprises, and obtain the longest animation of reproduction time;
(4) between last display frame tag block of the longest animation of reproduction time and its last tag block, insert and comprise the script tag piece that stops to play and closing the order of SWF formatted file.
A kind of implementation method of closing the SWF file automatically, described SWF file comprises the data message of being made up of in order tag block, described tag block can comprise the definition tag block that defines sub-animation and control is initiatively drawn and the control tag block of sub-animation operation, and this control tag block comprises display frame tag block and placing objects tag block; This method comprises the steps:
(1), the definition tag block of traversal SWF formatted file and control tag block, obtain all sub-animations definition information and placing objects information, and the starting point time of determining in the whole absolute time of playing described SWF formatted file, to play each sub-animation according to described definition information and placing objects information;
(2), determine to play according to described starting point time and frame number that each animation comprises and initiatively draw and the time span of each sub-animation, and obtain the longest animation of reproduction time;
(3) between last display frame tag block of the longest animation of reproduction time and its last tag block, insert and comprise the script tag piece that stops to play and closing the order of SWF formatted file;
(4) read described SWF formatted file playing animation, and after the last frame of the longest animation of described reproduction time plays, carry out the order in the described script tag piece, stop to play and closing automatically this SWF file.
The present invention is by finding out in the SWF file a longest timeline in the main timeline and period of the day from 11 p.m. to 1 a.m top-stitching, and before the last frame of the pairing animation of this timeline (initiatively drawing or sub-animation), insert the script tag piece and realize stopping to play and closing the SWF file automatically, thereby can guarantee just to be closed after whole SWF file is by complete broadcast.
Description of drawings
Fig. 1 is the Swf file structure synoptic diagram based on tag block;
Fig. 2 is the Swf file structure synoptic diagram based on timeline;
Fig. 3 is for inserting a synoptic diagram that comprises the script tag piece that stops play command in initiatively drawing;
Fig. 4 is a process flow diagram of the present invention;
Sequence number corresponding diagram in Fig. 5 placing objects tag block of the present invention information table;
Fig. 6 is the sub-animation time weights tree of the present invention synoptic diagram;
Fig. 7 increases the script tag synoptic diagram for the present invention in the longest sub-animation.
Embodiment
The present invention adds the script tag that stops to play at this longest timeline end then by finding out the longest in all timelines of a Swf file timeline, thereby guarantees to stop automatically after whole Swf file is by complete broadcast and close this Swf file.
Consult shown in Figure 4ly, realize that flow process of the present invention is as follows:
Step 1: travel through the definition tag block in the described SWF file, determine whether that definition has a sub-animation, if then carry out step 2, otherwise be that the longest animation of reproduction time continues step 5 with the active paintings.
Step 2: traversal Swf file, obtain all sub-animation definition information and placing objects information.
At first, all sub-animation definition label (Tid=39) in the traversal Swf file writes down its object ID (Cid) and frame number (FrameCount), is example with the Swf file of Fig. 1, and the sub-animation that counts defines label information as shown in Table 1,
Table one
| Sequence number | Object ID (Cid) | Frame number (FrameCount) |
| 1 | 0 | 5 |
| 2 | 1 | 7 |
| 3 | 2 | 2 |
| 4 | 3 | 3 |
| 5 | 4 | 2 |
Wherein, initiatively drawing as a special sub-animation, defining its object ID is 0.
Secondly, all display frame tag block (Tid=1) in the traversal Swf file, with the relevant placing objects tag block (Tid=26) of sub-animation definition tag block, promptly place in the placing objects tag block to as if an individual sub-animation.Need the information of statistics to comprise father's animate object ID, the frame position of placing objects tag block in father's animation, the sub-animate object ID that places in the placing objects tag block.Swf file with Fig. 1 is an example, the placing objects tag block information such as the table two that count:
Table two
| Sequence number | Father's animate object ID | Frame position in father's animation | The sub-animate object ID that places |
| 1 | 3 | 2 | 2 |
| 2 | 0 | 1 | 1 |
| 3 | 0 | 1 | 3 |
| 4 | 0 | 4 | 4 |
Sequence number in the table two is the sequencing decision according to tag block in the Swf file, gets the bid at Fig. 5 and understands order.
Placing objects tag block with sequence number 1 is an example, and " father's animate object ID " represents the object ID of this sub-animation in tag block place." frame position in father's animation " represents the relative time position of this tag block in the timeline at father's animation place, it is which frame in father's animation, as shown in Figure 5, in father's animation at the placing objects tag block place of sequence number 1, two display frame tag block (Tid=1) are arranged before, therefore, " frame position in father's animation " is 2." the sub-animate object ID of placement " represents the sub-animate object ID that this tag block is placed, and as Fig. 5, is 2. Sequence number 2,3,4 all in initiatively drawing, so their " father's animate object ID " is set to 0, expression is at top layer.
Step 3: the time weights that calculate sub-animation.
According to the Swf file structure of Fig. 2, need calculate all sub-animation time weights, so-called time weights, i.e. the starting point time of this sub-animation (period of the day from 11 p.m. to 1 a.m top-stitching) in whole absolute time top-stitching based on timeline.Can calculate the time weights of each sub-animation by table two, formula is as follows:
Time weights+" frame position in father's animation " of the time weights of " the sub-animate object ID of placement "=" father's animate object ID "
According to above-mentioned formula, can dependence between each sub-animation time weights be described by a multiway tree.Can set up stalk animation time weights tree by table two, as shown in Figure 6.
In the weights tree, each node is represented the object ID of a sub-animation definition tag block, each represents " the father's animate object ID " in the placing objects tag block information table and " the sub-animate object ID of placement " in the table two respectively to father node and child node, " frame position in father's animation " in the corresponding form of internodal line.
The time weights of each sub-animation are exactly to traverse weights sums all this paths of this node from root node.Like this, according to the sub-animation time weights tree of Fig. 6, just can calculate the time weights of all sub-animations.Result of calculation of this example such as following table:
Table three
| Sequence number | Object ID (Cid) | The |
| 1 | 0 | 0 |
| 2 | 1 | 1 |
| 3 | 2 | 3 |
| 4 | 3 | 1 |
| 5 | 4 | 4 |
Wherein, object ID is that the weights of 0 sub-animation (special sub-animation is promptly initiatively drawn) are 0.
Step 4: the time span of calculating sub-animation time length and initiatively drawing, and the animation of definite time span maximum.
According to table one and table three, can calculate the absolute time length of each sub-animation, promptly play from the Swf file, play the time span that finishes to this sub-animation, computing time, the formula of length was:
Time span=" time weights "+" frame number "
Result after the calculating is as shown in Table 4:
Table four
| Sequence number | Object ID (Cid) | |
| 1 | 0 | 0+5＝5 |
| 2 | 1 | 1+7＝8 |
| 3 | 2 | 3+2＝5 |
| 4 | 3 | 1+3＝4 |
| 5 | 4 | 4+2＝6 |
Initiatively the time span of drawing comprises the number of display frame tag block for initiatively drawing, and promptly 5.
The object ID that can draw the longest sub-animation of time span from table four is 1, and time span is 8.
Step 5: between last display frame tag block of the longest animation of reproduction time and its previous tag block, add one and comprise the script tag that stops to play and closing the Swf file.
In the present embodiment, for through after the step 2,3,4, the signal of inserting script tag in object identity is 1 the tag block that sub-animation comprised as shown in Figure 7.
Can guarantee to stop after whole file is by complete broadcast the Swf file of playing and closing automatically through having generated after the above-mentioned steps.
Step 6: read described SWF file playing animation, and after the last frame of the sub-animation of timeline the longest (being that object identity is 1) plays, stop to play and closing this SWF file automatically.
Like this, just accomplish to add exactly the script tag that stops to play, just stopped playing and closing automatically this Swf file after making the whole Swf file by complete broadcast.And the employing prior art, then the longest sub-animation of timeline does not play and has just stopped playing and closing the Swf file.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (7)
1. method that in the SWF formatted file, generates shutdown command; It is characterized in that this method comprises the steps:
(1) the definition tag block of traversal in the described SWF formatted file determines whether that definition has sub-animation, if, then carry out step (2), otherwise be the longest animation of reproduction time with the active paintings, continue step (4);
(2) the definition tag block of the described SWF formatted file of traversal and control tag block, obtain all sub-animations definition information and placing objects information, and the starting point time of determining in the whole absolute time of playing described SWF formatted file, to play each sub-animation according to described definition information and placing objects information;
(3) calculate the time span of playing active picture and each sub-animation according to described starting point time and frame number that each animation comprises, and obtain the longest animation of reproduction time;
(4) between last display frame tag block of the longest animation of reproduction time and its last tag block, insert and comprise the script tag piece that stops to play and closing the order of SWF formatted file.
2. the method for claim 1 is characterized in that, wherein step (2) may further comprise the steps:
A1, travel through all sub-animations definition labels, respectively frame numbers of comprising of sub-animate object sign of each of record definition and corresponding sub-animation;
In A2, the traversal control tag block all display frame tag block with the relevant placing objects tag block of sub-animation definition label, sub-animate object sign, the sub-animate object in placing objects tag block place that obtains placing in each placing objects tag block respectively identify and the sub-animation in place in frame position between corresponding relation;
A3, calculate each sub-animate object according to described corresponding relation and identify pairing time weights, with these time weights as the starting point time of playing sub-animation.
3. the method for claim 1, it is characterized in that, the time span of described each sub-animation is each sub-animate object sign frame number pairing with it and pairing time weights sum, and initiatively the time span of drawing is for initiatively drawing the number of the demonstration frame number tag block that is comprised.
4. an implementation method of closing the SWF formatted file automatically is characterized in that this method comprises the steps:
(1), the definition tag block of traversal SWF formatted file and control tag block, obtain all sub-animations definition information and placing objects information, and the starting point time of determining in the whole absolute time of playing described SWF formatted file, to play each sub-animation according to described definition information and placing objects information;
(2), determine to play according to described starting point time and frame number that each animation comprises and initiatively draw and the time span of each sub-animation, and obtain the longest animation of reproduction time;
(3) between last display frame tag block of the longest animation of reproduction time and its last tag block, insert and comprise the script tag piece that stops to play and closing the order of SWF formatted file;
(4) read described SWF formatted file playing animation, and after the last frame of the longest animation of described reproduction time plays, carry out the order in the described script tag piece, stop to play and closing automatically this SWF file.
5. implementation method as claimed in claim 4 is characterized in that, also comprises before in step (1):
At first travel through the definition tag block in the described SWF formatted file, determine whether that definition has a sub-animation, if, then carry out subsequent step (1), otherwise be the longest animation of reproduction time with the active paintings, continue step (3).
6. implementation method as claimed in claim 4 is characterized in that, wherein step (1) comprising:
A1, travel through all sub-animations definition labels, respectively frame numbers of comprising of sub-animate object sign of each of record definition and corresponding sub-animation;
In A2, the traversal control tag block all display frame tag block with the relevant placing objects tag block of sub-animation definition label, the sub-animate object sign that obtains respectively placing in each placing objects tag block, the sub-animate object at placing objects tag block place identify and the sub-animation in place in frame position between corresponding relation;
A3, calculate each sub-animate object according to described corresponding relation and identify pairing time weights, with these time weights as the starting point time of playing sub-animation.
7. method as claimed in claim 4, it is characterized in that, the time span of described each sub-animation is each sub-animate object sign frame number pairing with it and pairing time weights sum, and initiatively the time span of drawing is for initiatively drawing the number of the demonstration frame number tag block that is comprised.
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| CN113313793B (en) * | 2021-06-17 | 2023-11-24 | 豆盟(北京)科技股份有限公司 | Animation playing method, device, electronic equipment and storage medium |
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| CN1122257C (en) * | 1998-09-18 | 2003-09-24 | 英业达股份有限公司 | Multi media information multi-image playing method and system thereof |
| CN1144160C (en) * | 2001-02-15 | 2004-03-31 | 英业达股份有限公司 | Method and system for creating animation |
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| CN1122257C (en) * | 1998-09-18 | 2003-09-24 | 英业达股份有限公司 | Multi media information multi-image playing method and system thereof |
| CN1144160C (en) * | 2001-02-15 | 2004-03-31 | 英业达股份有限公司 | Method and system for creating animation |
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