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77 lines
2.2 KiB
Text
77 lines
2.2 KiB
Text
Documentation conventions
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-------------------------
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Due to the potential for exponential growth, several abbreviating conventions will be used throughout this
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documentation. These conventions have grown primarily from extremely in-depth discussions of the architecture in IRC.
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This has verified the safety of these conventions, if used properly. There are no known namespace conflicts as long as
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context is rigorously observed.
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Object classes
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~~~~~~~~~~~~~~
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Since everything starts with Gst, we will generally refer to objects by the shorter name, i.e. Element or Pad. These
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names will always have their first letter capitalized.
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Function names
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~~~~~~~~~~~~~~
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Within the context of a given object, functions defined in that object's header and/or source file will have their
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object-specific prefix stripped. For instance, gst_element_add_pad() would be referred to as simply _add_pad(). Note
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that the trailing parentheses should always be present, but sometimes may not be. A prefixing underscore (_) will
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always tell you it's a function, however, regardless of the presence or absence of the trailing parentheses.
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defines and enums
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~~~~~~~~~~~~~~~~~
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Values and macros defined as enums and preprocessor macros will be referred to in all capitals, as per their
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definition. This includes object flags and element states, as well as general enums. Examples are the states NULL,
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READY, PLAYING, and PAUSED; the element flags LOCKED_STATE , and state return values SUCCESS, FAILURE, and
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ASYNC. Where there is a prefix, as in the element flags, it is usually dropped and implied. Note however that
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element flags should be cross-checked with the header, as there are currently two conventions in use: with and without
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_FLAGS_ in the middle.
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Drawing conventions
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~~~~~~~~~~~~~~~~~~~
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When drawing pictures the following conventions apply:
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objects
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^^^^^^^
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Objects are drawn with a box like:
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+------+
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+------+
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pointers
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^^^^^^^^
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a pointer to an object.
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+-----+
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*--->| |
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+-----+
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an invalid pointer, this is a pointer that should not be used.
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*-//->
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elements
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^^^^^^^^
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+----------+
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| name |
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sink src
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+----------+
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pad links
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^^^^^^^^^
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-----+ +---
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src--sink
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-----+ +---
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