From multirate RM patch by Ronald S. Bultje



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Fixes issue1666


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inv_zigzag_direct16 16-byte aligned, so mark it appropriately.
Fixes encoder crashes e.g. with MPlayer's -vf lavc.


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libavutil/mathematics.h indirectly included by libavformat/avformat.h.


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Patch by Martin Storsjö reverse(<ts.nitram@nitram>).


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<$firstname () $firstname st>.



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if present. This fixes playback of a number of MS-RTSP streams, mostly these
for which playback contains a session key in the URI. Fixes issue 1697.
Patch by Alan Steremberg <$firstname dot $lastname () gmail com>.



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This compiler supports gcc-style alignment attributes for struct,
but not for global variables.  For the latter, alignment can be
specified with a pragma, which does not work for struct members or
local variables.  By using both pragma and attribute, one or the
other will always take effect.

Unfortunately, no means exists for aligning stack variables.

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The seemingly equivalent _Pragma(AV_STRINGIFY(x)) is not accepted
by some compilers.

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The awk command used inadvertently relied on non-standard features.

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Change order of operands as gcc uses a hardcoded register per operand it seems
even for static functions
thus reducing unneeded moved (now functions try to pass the same argument in
the same spot).
Change signed int to unsigned int for array indexes as signed requires signed
extension while unsigned is free.
move the +52 up and merge it where it will end as a lea instruction, gcc always
splits the 52 out there turning the free +52 into an expensive one otherwise.
The changed code becomes a little faster.


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This should be faster (couldnt meassue a difference), and its less picky
on slightly out of spec dquant.


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patch by Rafael (dot) Carre (a) gmail (d) com

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they are unused.



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response anyway.



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buffer, that is doomed to not work at some point.



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Patch by Martin Storsjö martin martin st


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little effect overall as this is not that often executed.


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The macro implementation might need the name of the variable being
declared for compiler-specific syntax.  Moving array specifiers outside
the macro invocation allows this to work.

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This makes ffmpeg stop printing millions of
  Multiple frames in a packet from stream 0
when decoding adpcm.

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formats with only one stream; the AVFormatContext values will be derived from
the AVStream and this helps in calculating stream bitrate.

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The various avcodec_thread_init() functions are updated to return
immediately after setting avctx->thread_count.  This allows -threads 0
to pass through to codecs.  It also simplifies the usage for apps
using libavcodec.

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Only tested on gcc 4 & x86_64.


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 It allows VLD H264 decoding using DXVA2 (GPU assisted decoding API under
VISTA and Windows 7).
 It is implemented by using AVHWAccel API. It has been tested successfully
for some time in VLC using an nvidia card on Windows 7.

 To compile it, you need to have the system header dxva2api.h (either from
microsoft or using http://downloads.videolan.org/pub/videolan/testing/contrib/dxva2api.h)
 The generated libavcodec.dll does not depend directly on any new lib as
the necessary objects are given by the application using FFmpeg.



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