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Document that and why subtitle decoders do not support direct-rendering.

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Originally committed as revision 24177 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2010-07-10 23:35:15 +00:00
parent 827396688c
commit 1f96d86836
1 changed files with 4 additions and 0 deletions
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libavcodec/avcodec.h
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@ -3542,6 +3542,10 @@ attribute_deprecated int avcodec_decode_subtitle(AVCodecContext *avctx, AVSubtit
* Return a negative value on error, otherwise return the number of bytes used.
* If no subtitle could be decompressed, got_sub_ptr is zero.
* Otherwise, the subtitle is stored in *sub.
* Note that CODEC_CAP_DR1 is not available for subtitle codecs. This is for
* simplicity, because the performance difference is expect to be negligible
* and reusing a get_buffer written for video codecs would probably perform badly
* due to a potentially very different allocation pattern.
*
* @param avctx the codec context
* @param[out] sub The AVSubtitle in which the decoded subtitle will be stored.