matroskadec: Fix a double negation typo

This typo has existed since this code was added in c16582579.
Newer versions of clang pointed out that this comparison always
was true (since the result of the negation is either 0 or 1, while
AVDISCARD_ALL has the value 48).

Signed-off-by: Martin Storsjö <martin@martin.st>
hevc: Use the local context variable when needed
lavf: document av_dump_format()
ismindex: Allow adding a path prefix to the generated .ism file

This allows storing the .ismv/.isma/.ismc files separately from
the .ism file on a server, without having to manually edit the
.ism file after generating it with the ismindex tool.

Signed-off-by: Martin Storsjö <martin@martin.st>
ismindex: Add an option for outputting files elsewhere than in the current directory

Signed-off-by: Martin Storsjö <martin@martin.st>
daud: split muxer and demuxer

Signed-off-by: Diego Biurrun <diego@biurrun.de>
id3v2enc: use a case-insensitive comparison for APIC picture type
webpdec: Fix decoding of the huffman group indices.

Per the specification, "The red and green components of a pixel
define the meta Huffman code used in a particular block of the ARGB
image."
x86: mpegvideoenc: Change SIMD optimization name suffixes to lowercase
libfdk-aacdec: Reduce the default decoder delay by one frame

The default error concealment method if none is set via
aacDecoder_SetParam(AAC_CONCEAL_METHOD) is set in
CConcealment_InitCommonData within the fdk-aac library
and is set to Energy Interpolation. This method requires one frame
delay to the output. To reduce the default decoder output delay and
avoid missing the last frame in file based decoding, use Noise
Substitution as the default concealment method.

Signed-off-by: Omer Osman <omer.osman@iis.fraunhofer.de>
Signed-off-by: Martin Storsjö <martin@martin.st>
x86: huffyuvdsp: Move inline assembly to init file

This avoids a link failure with MMX disabled as now code and
initialization are compiled under the same condition.
x86: Unconditionally compile blockdsp and svq1enc init files

This avoids a link failure with MMX disabled as the init functions
are referenced unconditionally.
x86: build: Only compile FDCT code if MMX is enabled

All other files containing purely inline assembly are treated the same way.
librtmp: Don't free the temp url at the end of rtmp_open

librtmp can keep pointers to this string internally, and may
use them at shutdown as well.

CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
vc1test: Return proper error codes

Signed-off-by: Diego Biurrun <diego@biurrun.de>
vc1test: Check malloc call

Signed-off-by: Diego Biurrun <diego@biurrun.de>
cljr: split decoder and encoder

Signed-off-by: Diego Biurrun <diego@biurrun.de>
paf: split audio and video decoder

Signed-off-by: Diego Biurrun <diego@biurrun.de>
bmv: Split audio and video decoder

Signed-off-by: Diego Biurrun <diego@biurrun.de>
dsicin: Split audio and video decoder

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