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Another attempt to clarify draw_horiz_band() usage.

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Originally committed as revision 17289 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ivan Kalvachev 2009-02-14 22:22:55 +00:00
parent b71bd0ed11
commit 24b1583a62
1 changed files with 7 additions and 7 deletions
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14
libavcodec/avcodec.h
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@ -960,13 +960,13 @@ typedef struct AVCodecContext {
* decoder to draw a horizontal band. It improves cache usage. Not
* all codecs can do that. You must check the codec capabilities
* beforehand.
* The functino is also used by hardware acceleration APIs as a callback
* to pass specific (partially decoded) data to the calling application
* so that the data can be passed to the rendering hardware.
* In that mode all relevant function parameters are inside a special
* structure passed by AVFrame in place of the pixel data.
* The exact structure depends on the acceleration API.
* The application is allowed to make changes in the structure.
* The function is also used by hardware acceleration APIs.
* It is called at least once during frame decoding to pass
* the data needed for hardware render.
* In that mode instead of pixel data, AVFrame points to
* a structure specific to the acceleration API. The application
* reads the structure and can change some fields to indicate progress
* or mark state.
* - encoding: unused
* - decoding: Set by user.
* @param height the height of the slice