75 lines
4.3 KiB
Plaintext
75 lines
4.3 KiB
Plaintext
DSM is ascii plain text. It is derived from the FCEUX FM2 format.
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It consists of several key-value pairs followed by an inputlog section.
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The inputlog section can be identified by its starting with a | (pipe).
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The inputlog section terminates at eof.
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Newlines may be \r\n or \n
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Key-value pairs consist of a key identifier, followed by a space separator, followed by the value text.
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Value text is always terminated by a newline, which the value text will not include.
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The value text is parsed differently depending on the type of the key.
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The key-value pairs may be in any order, except that the first key must be version.
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Integer keys (also used for booleans, with a 1 or 0) will have a value that is a simple integer not to exceed 32bits
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- version (required) - the version of the movie file format; for now it is always 3
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- emuVersion (required) - the version of the emulator used to produce the movie
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- rerecordCount (optional) - the rerecord count
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- romChecksum (optional) - the CRC32 of the rom used to make the movie. should match values specified on advanscene.com
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- romSerial (optional) - a concatenation of other uniquely identifying information about the rom (name,gamecode,makercode)
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- useExtBios (optional) - were bios files was used? defaults to false.
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- swiFromBios (optional) - were swi emulated by ExtBios? (alternative is internal HLE bios). defaults to false.
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The rom identification information may be used at a later point to warn about mismatches between movies and roms, but is not right now.
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String keys have values that consist of the remainder of the key-value pair line. As a consequence, string values cannot contain newlines.
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- romFilename (required) - the name of the file used to record the movie
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- comment (optional) - simply a memo.
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by convention, the first token in the comment value is the subject of the comment.
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by convention, subsequent comments with the same subject will have their ordering preserved and may be used to approximate multiline comments.
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by convention, the author of the movie should be stored in comment(s) with a subject of: author
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Hex string keys (used for binary blobs) will have a value that is like 0x0123456789ABCDEF...
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- romChecksum (required) - this is currently unused.
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GUID keys have a value which is in the standard guid format: 452DE2C3-EF43-2FA9-77AC-0677FC51543B
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- guid (required) a unique identifier for a movie, generated when the movie is created, which is used when loading a savestate to make sure it belongs to the current movie.
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The inputlog section consists of lines beginning and ending with a | (pipe).
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The fields are as follows, except as noted in note C.
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|c|.............XXX YYY Z|
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'R','L','D','U','T','S','B','A','Y','X','W','E','G'
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field c is a variable length decimal integer which is a bitfield corresponding to miscellaneous input states which are valid at the start of the frame.
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Therefore, no miscellaneous commands is represented by a value of 0.
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Here are the currently defined bit values:
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0x01 - Microphone Noise (hardcoded noise sample; to be held through duration of frame)
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0x02 - Reset
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0x04 - Lid
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the format of the main section is as follows:
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the field begins with 13 characters which constitute a bitfield.
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any character other than ' ' or '.' means that the button was pressed.
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by convention, the following mnemonics will be used in a column to remind us of which button corresponds to which column:
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RLDUTSBAYXWEG (Right,Left,Down,Up,sTart,Select,B,A,Y,X,lshoulder,rshoulder,debuG)
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This ordering is based on FCEUX to a certain extent, and arbitrary after that.
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W and E were chosen for shoulders to suggest West and East for Left and Right.
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While the emulator supports a 'lid' button, and to some extent a 'blow' button, these are not supported in the movies.
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XXX: %03d, the x position of the stylus (0,0 topleft, 255,191 bottomright)
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YYY: %03d, the y position of the stylus
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Z: %1d, 1 if the stylus is pressed pressed; 0 if not
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Additional fields after this main section may be added later without breaking the file format.
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* Notes *
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A. There is no key-value pair that indicates the length of the movie. This must be read by scanning the inputlog and counting the number of lines.
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B. All movies start from power-on.
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C. The emulator uses these framerate constants
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arm7_cycles_per_frame = 560190
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frames_per_second = 59.8261
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