The comments/header of the file are taken from qemu, they provide some
basic documentation
The code from the examples

Ive no means to test this except uploading to coverity for FFmpeg, so each
commit should stay simple, making it easy to revert.

Also please help making this a useful and effective file by contributing
changes/code to it and reviewing contributions.
I am happy to upload changes but i cannot really maintain this (alone) as
i cannot test changes.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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

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

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

Based on patch by Francisco Blas Izquierdo Riera
Commit message partly taken from carl

fixes a compilation
error in mlpdsp_init.c with -fstack-check and some gcc compilers (I
reproduced the issue with gcc 4.7.3) by simplifying the code.

See also https://bugs.gentoo.org/show_bug.cgi?id=471756

$ make libavcodec/x86/mlpdsp_init.o
libavcodec/x86/mlpdsp_init.c: In function ‘mlp_filter_channel_x86’:
libavcodec/x86/mlpdsp_init.c:142:5: error: can’t find a register in
class ‘GENERAL_REGS’ while reloading ‘asm’
libavcodec/x86/mlpdsp_init.c:142:5: error: ‘asm’ operand has impossible
constraints

4551 -> 4509 dezicycles
Reviewed-by: Ramiro Polla <ramiro.polla@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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

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

Signed-off-by: Supraja Meedinti <supraja0493@gmail.com>
Reviewed-by: Nicolas George <george@nsup.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

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

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

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

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

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

When receiving an RTCP packet, the difference between the last RTCP
timestamp and the base timestamp may be negative. As these timestamps
are of the uint32_t type, the result becomes a large integer. Cast
the difference to int32_t to avoid this issue.

The result of this issue is very large start times for RTSP
streams, and difficulty to restart correctly after a pause.
Signed-off-by: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'cbdd1806':
  rtpdec_hevc: Implement parsing of aggregated packets

Conflicts:
	libavformat/rtpdec_hevc.c

See: b6f577dbMerged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'b878ba03':
  rtpdec_hevc: Initialize variables to silence false positive compiler warnings
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '10e2d8b5':
  rtpdec_hevc: Use a shared function for parsing parameter sets
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '0de07510':
  rtpdec_h264: Make reusable functions non-static

Conflicts:
	libavformat/rtpdec_formats.h
	libavformat/rtpdec_h264.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '16163e6b':
  rtpdec_h264: Fix nal type counting after refactoring

Conflicts:
	libavformat/rtpdec_h264.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'a3cc519d':
  rtpdec_h264: Prepare h264_handle_packet_stap_a for sharing with hevc

Conflicts:
	libavformat/rtpdec_h264.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '48183b3a':
  rtpdec_h264: Generalize parse_sprop_parameter_sets
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'a982c5d7':
  tests: drop bc dependency

Conflicts:
	tests/fate-run.sh

See: d47eeff2Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'a06b0b12':
  h264: initialize H264Context.avctx in init_thread_copy
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '0dea4c77':
  h264: only ref cur_pic in update_thread_context if it is initialized

Conflicts:
	libavcodec/h264_slice.c

See: 0fc01ae3Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '9abc80f1':
  libavcodec: Make use of av_clip functions

Conflicts:
	libavcodec/takdec.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '76ce9bd8':
  libavutil: Add ARM av_clip_intp2_arm
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'bf07d813':
  libavutil: Add av_clip_intp2
Merged-by: Michael Niedermayer <michaelni@gmx.at>

With significant changes by Martin Storsjö, to use the shared
function instead of reimplementing it.
Signed-off-by: Martin Storsjö <martin@martin.st>

For some reason, clang didn't warn about this prior to using the
shared function.
Signed-off-by: Martin Storsjö <martin@martin.st>

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

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

This fixes builds with -DDEBUG after f0a87479.
Signed-off-by: Martin Storsjö <martin@martin.st>

Add a parameter for skipping a number of bytes at the start of each nal.
Signed-off-by: Martin Storsjö <martin@martin.st>

Don't write directly into an AVCodecContext, write into given
pointers.
Signed-off-by: Martin Storsjö <martin@martin.st>

We already have a dependency on awk and bc is sometimes not found in the
base system.
Signed-off-by: Martin Storsjö <martin@martin.st>

This prevents using a wrong (first thread's) AVCodecContext if decoding
a frame in the first pass over all threads fails.

It may be empty if the previous thread's decode call did not contain a
valid frame.

This improves the cleanup, dependency generation and DBG command issuing.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>