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back and write it at the end

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Most EBML masters are much smaller than IO_BUFFER_SIZE and thus the size
can be updated. This makes parsing the resulting files easier.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@22197 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

This results in a 50% speedup on main profile with no increase in binary size.


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Thanks to backwards compatible HE-AAC signalling these values are unreliable.


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1 cpu cycle faster


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consistent with the allocation currently done for PIX_FMT_GRAY8
pictures.

No significant slow-downs have been measured.

See the thread:
Subject: [FFmpeg-devel] [PATCH] Is gray8 a paletted format?
Date: Sun, 15 Nov 2009 23:36:03 +0100

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This is generally around 12% faster than the prior method of creating a
linked list for each block as tokens are read, but can be anywhere from
8% to 28% faster depending on file and CPU.

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This increases the slice size to 64 pixels, due to having to decode an
entire chroma superblock row per slice.

This can be up to 6% slower depending on clip and CPU, but is necessary
for future optimizations that gain significantly more than was lost.

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git-svn-id: file:///var/local/repositories/ffmpeg/trunk@22188 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

Patch by Anton Khirnov < whyskas at gmail >

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original patch by elupus _at_ ecce _dot_ se


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@22184 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

5 cpu cycles faster.


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This fixes some valgrind warnings.


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to the end of the structure.
4 cpu cycles faster in 3k cpu cycles


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a few months now). Fixes issue 1738.



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Patch by Jai Menon.


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Merge weight & offset tables.


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NetBSD is unlikely to fix their headers and the FATE box passes it
as -D_NETBSD_SOURCE on the command line anyway. In this case, it's
better to keep the hack well-contained within this file.
Closes issue 886.
patch by Jorge Acereda, jacereda brainstorm es


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30 cpu cycles faster


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Based on a patch by NVIDIA.


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git-svn-id: file:///var/local/repositories/ffmpeg/trunk@22159 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b