configure: Check for a different SDL function

This one is available both in SDL 1.2 and in 1.3 (which is the current
version available e.g. in macports), while 1.3 doesn't contain
SDL_Linked_Version().

The current check for SDL_Linked_Version() (available since SDL 1.2.13)
was added in 8f1b06c8, because including the headers for SDL_Init()
redirects the main() function, requiring the main function signature
to match the one of SDL_main (including argc/argv).

Signed-off-by: Martin Storsjö <martin@martin.st>
truemotion2: handle out-of-frame motion vectors through edge extension.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
truemotion: forbid invalid VLC bitsizes and token values.

SHOW_UBITS() is only defined up to n_bits is 25, therefore forbid
values larger than this in get_vlc2() (max_bits). tokens[][] can be
used as an index in deltas[], which has a size of 64, so ensure the
values are smaller than that.

This prevents crashes on corrupt bitstreams.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
lzw: fix potential integer overflow.
mov: don't overwrite existing indexes.

Prevents all kind of badness if files contain multiple
indexes.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
avf: fix audio writing in the output-example

av_init_packet does not reset data and size fields in AVPacket,
avcodec_encode_audio2 can use preallocated AVPacket.
avf: make the example output the proper message

av_dump_format needs the codecs opened in order to print
them.
output-example: K&R formatting cosmetics, comment spelling fixes
h264: Make ff_h264_decode_end() static, it is not used externally.

Also drop the now unnecessary ff_ prefix from its name.
h264: drop ff_h264_ prefix from static function ff_h264_decode_rbsp_trailing()
smacker audio: sign-extend the initial 16-bit predicted value

Fixes Bug #265

Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>
libspeexdec: set frame size in libspeex_decode_init()

This fixes speex decoding, which was broken in 85469f1c.
oggenc: add pagesize option to set preferred page size

When set, if an Ogg stream buffer has enough data, a page is made
instead of filling maximum-size pages. Using smaller pages results
smaller seek intervals at the expense of higher container overhead.

Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>
oggenc: fix condition when not to flush due to keyframe granule.

The previous condition of 0 page size was wrong,
that would disable the mechanism for all frames at
a start of a page, thus some keyframes still would not
get their own granule.
The real problem is that header packets must not be flushed,
but they have (and must have) 0 granule and thus would
be detected as keyframes.
Add a separate parameter to mark header packets.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>
cavs: Remove unused code.

The square is always passed as 1 whenever the function is called and
thus the if block never gets executed.

Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
apedec: check bits <= 32.

Fixes a floating-point exception further down.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
id3v2: fix skipping extended header in id3v2.4

In v2.4, the length includes the length field itself.
avfiltergraph: add an AVClass to AVFilterGraph on next major bump.

It will be used for logging, possibly also AVOptions.
avfiltergraph: try to reduce format conversions in filters.

Current code, with a filterchain such as
(input - yuv411) -> (scale - any) -> (sink - any)
will result in yuv420 being chosen for the second link, which is clearly
not right.

This commit attempts to improve in the following way:
repeat until convergence:
  loop over all filters
    find input link with exactly one format
    force this format on all output links of the same type (if possible)
vf_scale: avoid a pointless memcpy in no-op conversion.

I.e. just pass the buffer along when src parameters == dst parameters.