lavf/concat: document the use of the files durations.

Address trac ticket #2319.
snowenc: add forgotten emms_c()

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

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Move ff_cropTbl and ff_zigzag_direct from dsputil to mathtables.

These are widely used throughout libavcodec, nothing dsputil-specific.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
lavc: Split out ff_hwaccel_pixfmt_list_420[] over individual codecs

Not all hwaccels implement all codecs, so using one single list for
multiple such codecs means some codecs will be represented in the list,
even though they don't actually handle that codec. Copying specific
lists in each codec fixes that.

Signed-off-by: Martin Storsjö <martin@martin.st>
cavs: Add a dependency on h264chroma

This fixes standalone building of this decoder.

Signed-off-by: Martin Storsjö <martin@martin.st>
avconv: Make sure the encoder exists before inspecting supported_list

This fixes crashes when there is no encoder for the default codec of
selected format.

Signed-off-by: Martin Storsjö <martin@martin.st>
normalize calls to ff_alloc_packet2

- check ret < 0
- remove excessive error log

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'c10da30d8426a1f681d99a780b6e311f7fb4e5c5'

* commit 'c10da30d8426a1f681d99a780b6e311f7fb4e5c5':
  shorten: set invalid channels count to 0
  vorbisdec: check memory allocations
  h264: check for luma and chroma bit dept being equal

Conflicts:
	libavcodec/shorten.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit 'a2ad554def214d2d03b7c16f68dc081a8622f9ca'

* commit 'a2ad554def214d2d03b7c16f68dc081a8622f9ca':
  shorten: K&R formatting cosmetics

Conflicts:
	libavcodec/shorten.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '4c364eb2b856fc33cf7b42f7c7b979e69fde5f3a'

* commit '4c364eb2b856fc33cf7b42f7c7b979e69fde5f3a':
  shorten: report meaningful errors

Conflicts:
	libavcodec/shorten.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '5a4e9fe855282a99586050a507d0a486ad39df5b'

* commit '5a4e9fe855282a99586050a507d0a486ad39df5b':
  avcodec/internal: Fix #if DECODE_AUDIO / ENCODE_AUDIO name mismatch
  shorten: use the unsigned type where needed

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge commit '5da51284937649a8ebb84fa951c235438fcbf8ae'

* commit '5da51284937649a8ebb84fa951c235438fcbf8ae':
  cavs: Add a dependency on h264chroma
  lavc: Split out ff_hwaccel_pixfmt_list_420[] over individual codecs

Conflicts:
	libavcodec/h263dec.c
	libavcodec/h264.c
	libavcodec/mpeg12.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'qatar/master'

* qatar/master:
  avconv: Make sure the encoder exists before inspecting supported_list

Merged-by: Michael Niedermayer <michaelni@gmx.at>
lavu: add escape API

The escape API will be useful to perform escaping programmatically, which
is required when crafting argument strings, and will be used for context
printing as well.

This is based on the ffescape tool code, with a few extensions and fixes.
doc/texi2pod: fix @ref substitution rule, disallow "}" within the fields

Fix potential spurious substitution.
lavf/segment: add support to ffconcat segment list
libavcodec: changed mathematical functions in aacpsy.c

This patch changes existing mathematical functions with faster
ones. Speeds up encoding more than 10%. Tested on x86 and
MIPS platforms.

Signed-off-by: Bojan Zivkovic <bojan@mips.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
h264: Rename the jpeg_420 pixfmt list to match the common naming structure

Signed-off-by: Martin Storsjö <martin@martin.st>
lavc: Prettify printing of codec tags containing non alphanumeric characters

Make av_get_codec_tag_string() show codec tag string characters in a more
intelligible ways. For example the ascii char "@" is used as a number, so
should be displayed like "[64]" rather than as a printable character.

Apart alphanumeric chars, only the characters ' ' and '.' are used
literally in codec tags, all the other characters represent numbers.

This also avoids relying on locale-dependent character class functions.

Signed-off-by: Martin Storsjö <martin@martin.st>