It doesn't do anything except produce an error message when set.

Deprecate the corresponding AVFormatParameters field.

Address trac issue #92.

Also decrease the log level of the corresponding message to WARNING,
since the error is not fatal.

Prevent out-of-buffer writes. In particular fix smclocki32.avi.1.1
crash, trac issue #114, roundup issue #1482.

The channel_layout may have been set by the demuxer.

* qatar/master: (22 commits)
  configure: enable memalign_hack automatically when needed
  swscale: unbreak the build on non-x86 systems.
  swscale: remove if(bitexact) branch from functions.
  swscale: remove if(canMMX2BeUsed) conditional.
  swscale: remove swScale_{c,MMX,MMX2} duplication.
  swscale: use emms_c().
  Move emms_c() from libavcodec to libavutil.
  tiff: set palette in the context when specified in TIFF_PAL tag
  rtsp: use strtoul to parse rtptime and seq values.
  pgssubdec: fix incorrect colors.
  dvdsubdec: fix incorrect colors.
  ape: Allow demuxing of files with metadata tags.
  swscale: remove dead macro WRITEBGR24OLD.
  swscale: remove AMD3DNOW "optimizations".
  swscale: remove duplicate code in ppc/ subdirectory.
  swscale: remove duplicated x86/ functions.
  swscale: force --enable-runtime-cpudetect and remove SWS_CPU_CAPS_*.
  vsrc_buffer.h: add file doxy
  vsrc_buffer: tweak error message in init()
  msmpeg4: reindent.
  ...

Merged-by: Michael Niedermayer <michaelni@gmx.at>

This will be cleaned up in the next merge

Authorship / merged commits:
commit f668afd489
Author: Janne Grunau <janne-libav@jannau.net>
Date:   Fri Apr 15 09:12:34 2011 +0200

    swscale: fix "ISO C90 forbids mixed declarations and code" warning

    only hit with --enable-runtime-cpudetect

commit 7f2ae5c7af
Author: Janne Grunau <janne-libav@jannau.net>
Date:   Fri Apr 15 02:09:44 2011 +0200

    swscale: fix compilation with --enable-runtime-cpudetect

commit b6cad3df82
Author: Janne Grunau <janne-libav@jannau.net>
Date:   Fri Apr 15 00:31:04 2011 +0200

    swscale: correct include path to fix ppc altivec build

commit 6216fc70b7
Author: Luca Barbato <lu_zero@gentoo.org>
Date:   Thu Apr 14 22:03:45 2011 +0200

    swscale: simplify rgb2rgb templating

    MMX is always built. Drop the ifdefs

commit 33a0421bba
Author: Josh Allmann <joshua.allmann@gmail.com>
Date:   Wed Apr 13 20:57:32 2011 +0200

    swscale: simplify initialization code

    Simplify the fallthrough case when no accelerated functions
    can be initialized.

commit 735bf19511
Author: Josh Allmann <joshua.allmann@gmail.com>
Date:   Wed Apr 13 20:57:31 2011 +0200

    swscale: further cleanup swscale.c

    Move x86-specific constants out of swscale.c

commit 86330b4c92
Author: Luca Barbato <lu_zero@gentoo.org>
Date:   Wed Apr 13 20:57:30 2011 +0200

    swscale: partially move the arch specific code left

    PPC and x86 code is split off from swscale_template.c. Lots of code is
    still duplicated and should be removed later.

    Again uniformize the init system to be more similar to the dsputil one.

    Unset h*scale_fast in the x86 init in order to make the output
    consistent with the previous status. Thanks to Josh for spotting it.

commit c003832883
Author: Luca Barbato <lu_zero@gentoo.org>
Date:   Wed Apr 13 20:57:29 2011 +0200

    swscale: move away x86 specific code from rgb2rgb

    Keep only the plain C code in the main rgb2rgb.c and move the x86
    specific optimizations to x86/rgb2rgb.c
    Change the initialization pattern a little so some of it can be
    factorized to behave more like dsputils.

Conflicts:
	libswscale/rgb2rgb.c
	libswscale/swscale_template.c

code is based on existing 8bit MMX code
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

and supports alpha

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Signed-off-by: Mans Rullgard <mans@mansr.com>

Fix decoding of QT WRAW files.

From some tests it results that:

1. all of the AVI/MOV WRAW files (at least from the link posted
   to the trac ticket #108) need to be flipped
2. mov WRAW files need to use AVI color modes
3. assigning PAL8 mode by default to WRAW codec is not correct

Fix decoding of file CarltonMovie2.mov, fix trac issue #108.

Instead, only set the function pointers if bitexact flag is
not set during initialization. Since a change in flags triggers
a re-init anyway, this doesn't situations where flag values
change during runtime.

Instead, set function pointers conditionally during init. This
patch also reveals a whole branch of dead assembly code that is
therefore also removed.

Since image initialization was moved after tag parsing, the
palette needs to be specified in the context and then copied
to the allocated image in init_image().

Fixes a regression with TIFF images that have palette data,
trac issue #230, file Test_Flate_8bpp.tif.

Signed-off-by: Diego Biurrun <diego@biurrun.de>

strtol could return negative values, leading to various error messages,
mainly "non-monotonically increasing dts".

Signed-off-by: Anton Khirnov <anton@khirnov.net>

On Blu-ray colors are stored in the order YCrCb (and not YCbCr) as mentioned in the specifications:
see System Description Blu-ray Disc Read-Only Format, 9.14.4.2.2.1 Palette Definition Segment

When decoding a Blu-ray subtitle, the colors were incorrectly set.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

On DVD and HD-DVD colors are stored in the order YCrCb (and not YCbCr) as mentioned in the specifications:
see DVD Specifications for Read-Only Disc / Part 3, 4.3 Program Chain Information (7) PGC_SP_PLT
see DVD Specifications for High Definition Disc, 5.2 Navigation for Standard Content (11) PGC_SDSP_PLT
see DVD Specifications for High Definition Disc, 5.2 Navigation for Standard Content (12) PGC_HDSP_PLT
see DVD Specifications for High Definition Disc, 5.5 Presentation Data (4) SET_COLOR2

When decoding a DVD or HD-DVD subtitle, the colors were incorrectly set.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

The functions are identical to their MMX counterparts. Thus,
pretending that swscale is highly optimized for AMD3DNOW
extensions is a poorly executed practical joke at best.