Connect the new video rendering path to the compositor.
Hooks up the new VideoRendererAlgorithm to the VideoRendererImpl and it
to the VideoRendererSink (VideoFrameCompositor) which finally talks to
the VideoFrameProviderClientImpl!
All of this is behind a new flag: --enable-new-video-renderer for right
now. We'll slowly ramp it up based on crash and YouTube metrics. It is
also available via chrome://flags for our YT friends to test immediately.
The playback experience is significantly smoother, dropped frame counts
are significantly more accurate, power consumption is much lower in
background tabs, and slightly lower in the foreground!
Smoothness scores (windows):
New:
24: Smoothness: 98.750000, Freezing: 100.000000, ~Dropped: 29 / 749 (3.871829%)
30: Smoothness: 99.330000, Freezing: 100.000000, ~Dropped: 0 / 900 (0.000000%)
60: Smoothness: 99.280000, Freezing: 99.670000, ~Dropped: 6 / 1800 (0.333333%)
Old:
24: Smoothness: 92.640000, Freezing: 100.000000, ~Dropped: 29 / 749 (3.871829%)
30: Smoothness: 68.490000, Freezing: 99.440000, ~Dropped: 5 / 900 (0.555556%)
60: Smoothness: 99.280000, Freezing: 99.670000, ~Dropped: 6 / 1800 (0.333333%)
See http://xorax.sea/barcode/results_win/ for further details.
Power consumption metrics on OSX for 1080p VP9 playback averaged over 10 runs:
New:
energy_consumption_mwh: 38.994639mWh
idle_wakeups_total: 1459.600000count
cpu_utilization (browser): 4.752003%
cpu_utilization (gpu): 7.791677%
cpu_utilization (renderer): 74.691065%
Old:
energy_consumption_mwh: 39.114139mWh
idle_wakeups_total: 1947.900000count
cpu_utilization (browser): 5.125488%
cpu_utilization (gpu): 8.624919%
cpu_utilization (renderer): 84.009566%
New Background:
energy_consumption_mwh: 31.402967mWh
idle_wakeups_total: 195.500000count
cpu_utilization (browser): 1.594367%
cpu_utilization (gpu): 0.154281%
cpu_utilization (renderer): 49.920668%
Old Background:
energy_consumption_mwh: 42.224069mWh
idle_wakeups_total: 522.200000count
cpu_utilization (browser): 1.629945%
cpu_utilization (gpu): 0.155414%
cpu_utilization (renderer): 63.333668%
See http://xorax.sea/barcode/results_osx/ for the full run details. I wouldn't
trust the absolute values for cpu or energy consumption, but the relative
difference should be meaningful.
This clamps background canvas updates from video to once every 250ms,
but in practice I couldn't tell the difference when tab switching in
a debug build.
BUG=386551, 396803, 438680, 438766, 439548, 460190
TEST=manual playback, unit tests
TBR=asvitkine
Review URL: https://codereview.chromium.org/1083383005
Cr-Commit-Position: refs/heads/master@{#327889}
17 files changed
