mpeg: Add passing DVD navigation packets (startcode 0x1bf) to caller to allow better playback handling of DVDs.

The two types of packets (PCI and DSI) are passed untouched but combined by the new codec ID AV_CODEC_ID_DVD_NAV.
 The first 980 bytes in the packet contain the PCI data. The next 1018 are the DSI data.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* cigaes/master:
  lavfi/buffersink: fix header.
  lavfi/buffersrc: disable deprecated warnings.
  lavfi/buffersrc: check channel count changes.
  lavfi/buffersrc: set channel layout if it is known.
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Fixes regression since 01a0283c
Fixes Ticket2371
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

The corresponding codec options (skip_loop, skip_idct, skip_frame) can be
set in a more flexible way.

This technically causes a user interface break, but since the options
were not even documented and we just released a major version that should
not be a serious issue.

Fix warning:
ffplay.c: In function ‘video_thread’:
ffplay.c:1890:21: warning: unused variable ‘codec’ [-Wunused-variable]

* qatar/master:
  lavc,lavfi: fix calculating the plane size in the AVBufferRef wrappers
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '23f4c5ac':
  document the release process
Merged-by: Michael Niedermayer <michaelni@gmx.at>

Move non-obsolete functions, structures and constants outside
the scope of "#if FF_API_AVFILTERBUFFER".

Add attribute_deprecated to av_buffersink_get_buffer_ref()
and av_buffersink_poll_frame().

Add doxygen for av_buffersink_get_frame_flags().

Signed-off-by: Paul B Mahol <onemda@gmail.com>

Introduced in 01649c79, lost in the API change.

It is supposed to be height * linesize, not width * linesize.
Thanks to Hendrik Leppkes for pointing out the bug.

* cus/stable:
  ffplay: add -af option
  ffplay: use refcounted frames for audio
  ffplay: use frame->pts if available for setting the audio clock
  ffplay: restructure audio stream opening code
Merged-by: Michael Niedermayer <michaelni@gmx.at>

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

Based on a patch by Stefano Sabatini <stefasab@gmail.com>:
http://ffmpeg.org/pipermail/ffmpeg-devel/2013-February/138452.htmlSigned-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

Signed-off-by: Marton Balint <cus@passwd.hu>

Preparation for -af support.
Signed-off-by: Marton Balint <cus@passwd.hu>

The padding was lost during porting from avcodec
Should fix out of array accesses

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

Fix reference after f7ab23b0.
+10l to me, this time aliens are not involved.

+10l to me, I blame the aliens.

Fixes memleak spotted by FATE.

Warning note suggested by Reimar.

The functions which actually drive the filter graph by pushing
frames through it need to ensure an aligned stack for SIMD functions.

This fixes a crash in YADIF filter when using a mingw build in a MSVC application.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Regression since de3e0ab3.

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

The filter already checks that width (and height) are greater than 3.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

These smaller samples do not need to be unpacked to double words
allowing the code to process more pixels every iteration (still 2 in MMX
but 6 in SSE2).  It also avoids emulating the missing double word
instructions on older instruction sets.

Like with the previous code for 16-bit samples this has been tested on
an Athlon64 and a Core2Quad.

Athlon64:
1809275 decicycles in C,    32718 runs, 50 skips
 911675 decicycles in mmx,  32727 runs, 41 skips, 2.0x faster
 495284 decicycles in sse2, 32747 runs, 21 skips, 3.7x faster

Core2Quad:
 921363 decicycles in C,     32756 runs, 12 skips
 486537 decicycles in mmx,   32764 runs,  4 skips, 1.9x faster
 293296 decicycles in sse2,  32759 runs,  9 skips, 3.1x faster
 284910 decicycles in ssse3, 32759 runs,  9 skips, 3.2x faster
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

This is a fairly dumb copy of the assembly for 8-bit samples but it
works and produces identical output to the C version.  The options have
been tested on an Athlon64 and a Core2Quad.

Athlon64:
1810385 decicycles in C,    32726 runs, 42 skips
1080744 decicycles in mmx,  32744 runs, 24 skips, 1.7x faster
 818315 decicycles in sse2, 32735 runs, 33 skips, 2.2x faster

Core2Quad:
 924025 decicycles in C,     32750 runs, 18 skips
 623995 decicycles in mmx,   32767 runs,  1 skips, 1.5x faster
 406223 decicycles in sse2,  32764 runs,  4 skips, 2.3x faster
 387842 decicycles in ssse3, 32767 runs,  1 skips, 2.4x faster
 307726 decicycles in sse4,  32763 runs,  5 skips, 3.0x faster
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

Reconfiguring can break x264 lossless encoding.

Fixes ticket #2165.