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// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stdint.h>
namespace media {
class VideoFrame;
namespace test {
// Compare each byte of two VideoFrames, |frame1| and |frame2|, allowing an
// error up to |tolerance|. Return the number of bytes of which the difference
// is more than |tolerance|.
size_t CompareFramesWithErrorDiff(const VideoFrame& frame1,
const VideoFrame& frame2,
uint8_t tolerance);
// Compute PSNR (Peak Signal-to-Noise Ratio) and SSIM (Structural SIMilarity)
// from |frame1| and |frame2|. These metrics give an estimate of the similarity
// of two images, and can be used as an indication of image quality when
// compared to a baseline.
// The VideoFrames must be memory-based. Note: since these functions leverage
// libyuv::I420(Ssim|Psnr), I420 VideoFrames are created from |frame1| and
// |frame2| if they are not I420.
double ComputePSNR(const VideoFrame& frame1, const VideoFrame& frame2);
double ComputeSSIM(const VideoFrame& frame1, const VideoFrame& frame2);
} // namespace test
} // namespace media