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through a context variable as this is simpler and i think also faster, but
the return value of functions could be used instead of course.
The code also ensures as a side effect that the AC decoder state does not
become invalid.
This fixes all known crashes. And outputs nothing in case of an error instead
of random noise.


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DECLARE_ALIGNED_8 is not defined at that point, but this code is powerpc
only, so it's really equivalent to DECLARE_ALIGNED(16...


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Fixes decoding of vdr-radio.vdr. (issue198)


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POSIX grep is not required to support non-text files.

Idea by Rich Felker.


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with the other libav*.


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the same way it's done for MinGW.

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inside downmix loop. 7% faster 5.1-to-stereo downmixing.

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patch by İsmail Dönmez, ismail namtrac org


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gives 7% faster decoding on average.

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