Also shuffle them a little to simplify next Libav merge.

Consistent with the rest of the rules

* commit 'cc58656a':
  fate: Add tests for MagicYUV
Merged-by: Clément Bœsch <u@pkh.me>

* commit 'd78fd2fa':
  Add MagicYUV decoder

Changes observed from Libav:
- many cosmetics (function renames/move, spacing, line breaks)
- MagicYUVContext.slices_size is now unsigned
- use of pixdesc (include fixed in FFmpeg)
- mention of "Lossless" in the long name dropped (also removed from
  general.texi in FFmpeg)
- addition of the FF_CODEC_CAP_INIT_THREADSAFE caps
- use of qsort() instead of AV_QSORT() (NOT MERGED)
- use of AVCodecContext.{width,height} instead of AVCodecContext.coded_{width,height} (NOT MERGED)

See also 77f9c4b7Merged-by: Clément Bœsch <u@pkh.me>

Reviewed-by: Steven Liu <lingjiujianke@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Reviewed-by: Steven Liu <lingjiujianke@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes CID 1363963.

Adding a check for bits == 0 would still make Coverity misdetect this,
so just revert to the normal way of setting the residue to 0.
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

Can also be used in future cleanups since 99% of the time the leftover
appending will just append to an already empty residue.
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

Also drops the start variable since it's redundant.
Found by Coverity, fixes CID1363964
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

Found by Coverity, fixes CID1363961 and CID1363962
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

Shifting by more than 63 bits is undefined behavior, athough any
compiler not returning 0 after shifting by any amount would be insane.

Found by Coverity, fixes CID1363959 and CID1363960
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

Fixes CID1363015
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

* commit 'ec9f0442':
  ffv1: Error out on unsupported format

This commit is a noop, the feature is already present in FFmpeg.
Merged-by: Matthieu Bouron <matthieu.bouron@stupeflix.com>

Fix the demuxer dependencies in some of the tests and remove the vp8 decoder
dependency for the stream copy tests
Reviewed-by: Hendrik Leppkes <h.leppkes@gmail.com>
Signed-off-by: James Almer <jamrial@gmail.com>

* commit '105998fb':
  checkasm: Add tests for h264 idct
Merged-by: Matthieu Bouron <matthieu.bouron@stupeflix.com>

Chunk was not merged in ca5ec2bf.

* commit '846a3e78':
  mov: Support prores with multiple stsd
Merged-by: Matthieu Bouron <matthieu.bouron@stupeflix.com>

* commit '76729970':
  mov: Implement support for multiple sample description tables

Notes:
  * The sc->stsc_data[index].id checks have been moved from the mov_read_stsc
  to mov_read_packet before the value is used in mov_change_extradata to
  not break playback of samples with broken stsc entries (see sample of
  ticket #1918).

  * sc->stsc_index is now checked against sc->stsc_count - 1 before it
  is incremented so it remains lesser than sc->stsc_count. Fixes a crash
  with:

  ./ffmpeg -i matrixbench_mpeg2.mpg -t 1 -frag_duration 200k test.mov
  ./ffprobe -show_packets test.mov
Merged-by: Matthieu Bouron <matthieu.bouron@stupeflix.com>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Chrome canary now supports decoding of VP9 streams with alpha
channel [1]. Add support to ffmpeg for creating such files.

[1] https://codereview.chromium.org/2096813002/Reviewed-by: James Zern <jzern@google.com>
Signed-off-by: Vignesh Venkatasubramanian <vigneshv@google.com>

Signed-off-by: Burt P <pburt0@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Burt P <pburt0@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Reviewed-by: Rostislav Pehlivanov <atomnuker@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Fixes ticket #5704
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

That SIMD is still x86_64 only for now.
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

This is now handled by the slice decoding function.
Signed-off-by: Rostislav Pehlivanov <rpehlivanov@obe.tv>

Signed-off-by: Rostislav Pehlivanov <rpehlivanov@obe.tv>

Still much left to optimize, but it provides a significant performance
improvement - 10% for 300Mbps (1080p30), 25% for 1.5Gbps (4k 60fps) in
comparison with the default implementation.
Signed-off-by: Rostislav Pehlivanov <rpehlivanov@obe.tv>

Now coefficients are written to a buffer and are then dequantized by the
new SIMD dequantization functions. For the lower bands without enough
coefficients to fill a register (and hence they overwrite) the C version
of the dequantization function is used.

The buffer is per-thread and will be realloc'd if anything changes.
This prevents regressions and having to limit slice size.
Signed-off-by: Rostislav Pehlivanov <rpehlivanov@obe.tv>

Prevents having to have random magic values in the decoder and a
separate macro in the encoder.
Signed-off-by: Rostislav Pehlivanov <rpehlivanov@obe.tv>

Siginificantly improves the performance.
Signed-off-by: Rostislav Pehlivanov <rpehlivanov@obe.tv>

In preparation for the following commits, this commit simplifies the
coefficient parsing and dequantization function. It was needlessly
inlined without much performance gain.
Signed-off-by: Rostislav Pehlivanov <rpehlivanov@obe.tv>

Signed-off-by: Rostislav Pehlivanov <rpehlivanov@obe.tv>

Currently unused, to be used in the following commits.
Signed-off-by: Rostislav Pehlivanov <rpehlivanov@obe.tv>

Also fix a possible issue with the mpegaudio audiotoolbox decoders.
Fixes ticket #5703.

This allows simpler selection of flac in ogg from the command line,
while following the RFC 5334 recommendation[1] for the oga extension.

[1] https://tools.ietf.org/html/rfc5334#section-10.3Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: James Almer <jamrial@gmail.com>