Avoid a division by zero.

CC: libav-stable@libav.org
Bug-Id: CID 717750

Avoid a division by zero.

CC: libav-stable@libav.org
Bug-Id: CID 717749

* commit 'f771b3ab5d3c0b763ee356152be550f4121babd0':
  avidec: do not export stream_codec_tag

Conflicts:
	libavformat/avidec.c

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

* commit '167e004e1aca7765686ed95d7cd8ea5064d4f6f6':
  h264: drop any pretense of support for data partitioning

Conflicts:
	libavcodec/h264.c

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

* commit '58ae8d595724150c407ca2c2df3aa4bd5580397c':
  h264_parser: restore a comment lost in 0268a54

Conflicts:
	libavcodec/h264_parser.c

No change, the code that is commented is no longer there in the form to
which the comment applied

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

* commit 'ecab21ac47d0d4ca604bebf494017ae5090853a8':
  h264: do not reset the ref lists in flush_change()

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

* commit '9404a47a2d1df418946a338938eb6cdb3afed474':
  h264: move parser-only variables to their own context

Conflicts:
	libavcodec/h264_parser.c

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

* commit 'cf1e0786ed64e69614760bfb4ecd7adbde8e6094':
  error_resilience: move the MECmpContext initialization into ER code

Conflicts:
	libavcodec/error_resilience.c
	libavcodec/h264.c
	libavcodec/h264.h
	libavcodec/h264_slice.c

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

* commit 'a7e0380497306d9723dec8440a4c52e8bf0263cf':
  avconv_dxva2: add hevc support

See: 5f2cdf9c3c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '7e850fa67e32ebe98581c2e4ca4a4655dee7f116':
  Add DXVA2 HEVC HWAccel

Conflicts:
	configure
	libavcodec/allcodecs.c
	libavcodec/dxva2_hevc.c

See: 36962ad233
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'b82722df9b2911bd41e0928db4804067b39e6528':
  hevc: reindent after previous commit

Conflicts:
	libavcodec/hevc.c

See: f8ecffa9b7
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'e72e8c5a1df61447ac7af750531e96e8b62d02ba':
  hevc: add hwaccel hooks

Conflicts:
	libavcodec/hevc.c
	libavcodec/hevc_refs.c

See: b2e9b0f5d4
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '4b95e95dbae58c9b60891284bf8b5bbd83e5293a':
  hevc: store the short term rps flag and size in the context

See: 06894f1a04
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '36779a84051eae6744cc936d91b1d428143665ba':
  hevc: store the escaped/raw bitstream in HEVCNAL

See: 2af82a1ad9
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit 'b0593a4bca138f1f026d8c21e8c3daa96800afe2':
  hevc: pass the full HEVCNAL struct to decode_nal_unit

Conflicts:
	libavcodec/hevc.c

See: 77140279d3
Merged-by: Michael Niedermayer <michaelni@gmx.at>

* commit '3a70c0c95feacb3844d05eebd579fc8189a77eee':
  examples/transcode_aac: generate proper PTS and set the muxer timebase

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

* commit 'c9b19ac8928c6c9b7f25c3988177204f110d5e0e':
  examples/transcode_aac: fix a typo

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

* commit '749a89d1b8bb73b4d4f14c48f33259a1300c1761':
  examples/transcode_aac: properly select the output sample format

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

* commit '443b71928b2f36362e805c037751e6c3c79ea4e8':
  hevc: unref the current frame if frame_start() fails

Conflicts:
	libavcodec/hevc.c

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

* commit '1dd021929f8157b88529ce1e6ab6351dd2899e89':
  hevc: clear unused refs on failure

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

* commit 'f9f883af4fe615a832407a657752e248a96c6280':
  h264: simplify code in flush_dpb()

Conflicts:
	libavcodec/h264.c

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

Reviewed-by: compn <tempn@mi.rr.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>

For future use by hardware accelerators.

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

Hardware Accelerators require access to the escaped bitstream.

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

Currently, audio service type is a field in AVCodecContext. However,
side data is more appropriate for this kind of information.

It is unreliable, especially when the stream codec context is not the
encoding context. Use the codec descriptor properties instead.

Handle its only existing use case internally.

It does not work correctly and apparently never did. There is no
indication that this (mis)feature is ever used in the wild or even that
any software other than the reference supports it.

Since the code that attempts to support it adds some nontrivial
complexity and has resulted in several bugs in the past, it is better to
just drop it.

They are always constructed anew when needed, so there is no need to
reset them explicitly.

Currently, it needs to be initialized by the ER caller (which is
currently either a mpegvideo decoder or h264dec). However, since none of
those decoders use MECmpContext for anything except ER, it makes more
sense to handle it purely inside ER.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

For future use by hardware accelerators.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Hardware Accelerators require access to the escaped bitstream.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

This enables decode_nal_unit to access additional fields added in
subsequent commits.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Signed-off-by: Anton Khirnov <anton@khirnov.net>

Makes the example work with all the supported AAC encoders.

Signed-off-by: Anton Khirnov <anton@khirnov.net>