This commit permits signalling a per-slice delta QP for luma and
chroma attribute components.  The delta is relative to the base
value derived from the APS.

NB: while syntax support and derivation processes are provided,
this commit does not contain any method to control the delta
QP value at the encoder.

Noritaka Iguchi authored Mar 27, 2019 and David Flynn committed Apr 16, 2019

This commit introduces control of the quantisation step size using
the familiar HEVC | AVC quantisation parameter.

This commit rewrites the codec high-level syntax:

 - the bitstream is divided into "bricks" (akin to an AVC/HEVC
   slice/tile).

 - sequence, geometry and attribute parameter sets describe the coding
   parameters in use generally and for a specific brick.

 - marshalling the bitstream payloads to a file format is achieved using
   a type-length-value encoding scheme.

Additionally, the triSoup bitstream scale and translation values have
been unified with (replaced by) the octree counterparts.  For
compatibility, existing command line parameters continue to function
as before.

NB: this commit does not incorporate flexibility in the decoding order.
The decoder requires the bitstream to be presented in a fixed order.

Philip A. Chou authored Mar 29, 2018 and David Flynn committed Jun 05, 2018

This commit does not add the triangle soup geometry compressor to TMC3,
rather.  Rather, it adds a means to call out to TMC1 binaries to perform
the compression, integrate the results into the bitstream.

Attribute compression is performed natively by the TMC13 codec.

This commit changes the application's reporting of elapsed time to
measure user time rather than wall time in order to reduce sources
of noise in evaluating runtime.

For output is now of the form:

  ```
  Processing time (wall): 123.456 s
  Processing time (user): 123.456 s
  ```



git-svn-id: http://wg11.sc29.org/svn/repos/MPEG-I/Part5-PointCloudCompression/TM/TMC3/trunk@1329 94298a81-5874-47c9-aab8-bfb24faeed7f

This commit replaces the previous command-line argument parsing with
program-options-lite, which additionally serves as a simple config-file
parser.

A table based configuration of options provides in a single place
option naming, help text, and default values.

Side effects of this change are to:

 - adds further error checking for unknown arguments (warning only), parse
   failures, required options.

 - replace the default constructor of Parameters,
   PCCAttributeEncodeParamaters, and PCCAttributeEncodeParamaters
   with defaults in args handler

 - updates the type of Parameters::mode & ...::colorTransform to be more
   more descriptive.



git-svn-id: http://wg11.sc29.org/svn/repos/MPEG-I/Part5-PointCloudCompression/TM/TMC3/trunk@1318 94298a81-5874-47c9-aab8-bfb24faeed7f

git-svn-id: http://wg11.sc29.org/svn/repos/MPEG-I/Part5-PointCloudCompression/TM/TMC3/trunk@1262 94298a81-5874-47c9-aab8-bfb24faeed7f

git-svn-id: http://wg11.sc29.org/svn/repos/MPEG-I/Part5-PointCloudCompression/TM/TMC3/trunk@1231 94298a81-5874-47c9-aab8-bfb24faeed7f

git-svn-id: http://wg11.sc29.org/svn/repos/MPEG-I/Part5-PointCloudCompression/TM/TMC3/trunk@1223 94298a81-5874-47c9-aab8-bfb24faeed7f

git-svn-id: http://wg11.sc29.org/svn/repos/MPEG-I/Part5-PointCloudCompression/TM/TMC3/trunk@1221 94298a81-5874-47c9-aab8-bfb24faeed7f