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lavc: clarify get_buffer() documentation 

This is needed for the AAC decoder, which may need to call get_buffer()
more than once if the channel configuration changes.
This commit is contained in:
Justin Ruggles 2012-11-25 11:37:14 -05:00
parent 3ffed68c2a
commit 8e134e5104
1 changed files with 6 additions and 1 deletions
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7
libavcodec/avcodec.h
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@ -2218,7 +2218,12 @@ typedef struct AVCodecContext {
*
* Decoders cannot use the buffer after returning from
* avcodec_decode_audio4(), so they will not call release_buffer(), as it
* is assumed to be released immediately upon return.
* is assumed to be released immediately upon return. In some rare cases,
* a decoder may need to call get_buffer() more than once in a single
* call to avcodec_decode_audio4(). In that case, when get_buffer() is
* called again after it has already been called once, the previously
* acquired buffer is assumed to be released at that time and may not be
* reused by the decoder.
*
* As a convenience, av_samples_get_buffer_size() and
* av_samples_fill_arrays() in libavutil may be used by custom get_buffer()