The Annoyance Filter.pdf - Fourmilab

§110 ANNOYANCE-FILTER FLASH STREAM DECODER 89
110. After the header, a Flash file consists of a sequence of tags, each of which begins with a 10 bit
tag type and a field specifying the number of bytes of tag data which follow. Since each tag specifies its
length, unknown tags may be skipped.
〈 Flash file tag values 110 〉 ≡ /∗ Tag values that represent actions or data in a Flash script. ∗/
typedef enum { stagEnd = 0, /∗ End of Flash file—this is always the last tag ∗/
stagShowFrame = 1,
stagDefineShape = 2,
stagFreeCharacter = 3,
stagPlaceObject = 4,
stagRemoveObject = 5,
stagDefineBits = 6,
stagDefineButton = 7,
stagJPEGTables = 8,
stagSetBackgroundColor = 9,
stagDefineFont = 10,
stagDefineText = 11,
stagDoAction = 12,
stagDefineFontInfo = 13,
stagDefineSound = 14, /∗ Event sound tags. ∗/
stagStartSound = 15,
stagDefineButtonSound = 17,
stagSoundStreamHead = 18,
stagSoundStreamBlock = 19,
stagDefineBitsLossless = 20, /∗ A bitmap using lossless zlib compression. ∗/
stagDefineBitsJPEG2 = 21, /∗ A bitmap using an internal JPEG compression table. ∗/
stagDefineShape2 = 22,
stagDefineButtonCxform = 23,
stagProtect = 24, /∗ This file should not be importable for editing. ∗/
/∗ These are the new tags for Flash 3. ∗/
stagPlaceObject2 = 26, /∗ The new style place w/ alpha color transform and name. ∗/
stagRemoveObject2 = 28,
/∗ A more compact remove object that omits the character tag (just depth). ∗/
stagDefineShape3 = 32, /∗ A shape V3 includes alpha values. ∗/
stagDefineText2 = 33, /∗ A text V2 includes alpha values. ∗/
stagDefineButton2 = 34, /∗ A button V2 includes color transform, alpha and multiple actions ∗/
stagDefineBitsJPEG3 = 35, /∗ A JPEG bitmap with alpha info. ∗/
stagDefineBitsLossless2 = 36, /∗ A lossless bitmap with alpha info. ∗/
stagDefineEditText = 37, /∗ An editable Text Field ∗/
stagDefineSprite = 39, /∗ Define a sequence of tags that describe the behavior of a sprite. ∗/
stagNameCharacter = 40, /∗ Name a character definition, character id and a string, (used for
buttons, bitmaps, sprites and sounds). ∗/
stagFrameLabel = 43, /∗ A string label for the current frame. ∗/
stagSoundStreamHead2 = 45, /∗ For lossless streaming sound, should not have needed this... ∗/
stagDefineMorphShape = 46, /∗ A morph shape definition ∗/
stagDefineFont2 = 48 ,
} tagType ;
This code is used in section 100.