samrobinson 4a0b07b4f7 Add an SsimMapperTest, which binary searches for 95% ssim.
This is possible because SSIM increases monotonically with bitrate.

PiperOrigin-RevId: 463434373
2022-08-08 08:11:22 +00:00
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2022-08-08 08:04:20 +00:00