commit 5d6a06c1d29a2061bcf4b321ffceab477a404d51
author ivica <ivica@webrtc.org> Thu Sep 17 12:30:24 2015
committer Commit bot <commit-bot@chromium.org> Thu Sep 17 12:30:30 2015
tree 7ab0670f5686db87e1f5508f358bc2ba7e446172
parent f2bfc2b8ef3d774658b9ce3dcd6757f932d071fb

Refactoring full stack and loopback tests

Refactoring full stack, video and screenshare tests to use the same code basis
for parametrization and initialization. This patch is done on top of recently
commited full stack graphs CL https://codereview.webrtc.org/1289933003/, but
virtually no changes have been made to full_stack_plot.py nor to the VideoAnalyzer
in full stack, except moving it to video_quality_test.cc.
Also, full_stack_samples.cc (build target) was removed and replaced with
-output_filename and -duration cmdline arguments in video_loopback and
screenshare_loopback.

The important things to review:
- video_quality_test.h
    Is the structure of Params good? (examples of usage can be found in
    full_stack.cc, video_loopback.cc and screenshare_loopback.cc)
- video_quality_test.cc
    Is the initialization correct? The case for using Analyzer and using local
    renderer are different, can they be further merged?
- webrtc_tests.gypi

Reproducing the different bitrate settings the full stack and loopback tests had
was a little bit tricky. To support both simultaneously, I added BitrateConfig
to the Params struct, as well as separate start_bitrate and target_bitrate flags
for loopback tests.

Note: Side-by-side diff for video_quality_test.cc compares that file directly
with the old full_stack.cc, so changes to VideoAnalyzer are clearly visible.

Note: Recent CL I've committed added -num_temporal_layers and -sl_discard_threshold
args to loopback tests. This was removed here. Support for streams and SVC
will be added in a CL following this one.

Review URL: https://codereview.webrtc.org/1308403003

Cr-Commit-Position: refs/heads/master@{#9969}