chromium/media/capabilities/bucket_utility.cc

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#include "media/capabilities/bucket_utility.h"

#include <algorithm>
#include <cmath>
#include <iterator>

#include "base/check_op.h"

namespace {

// TODO(chcunningham): Find some authoritative list of frame rates.
// Framerates in this list go way beyond typical values to account for changes
// to playback rate.
const int kFrameRateBuckets[] = …;

// A mix of width and height dimensions for common and not-so-common resolutions
// spanning 50p -> 12K.
// TODO(chcunningham): Ponder these a bit more.
const int kSizeBuckets[] = …;

// Pixel buckets that are used to quantize the resolution to limit the amount of
// information that is stored and exposed through the API. The pixel size
// indices are used for logging, the pixel size buckets can therefore not be
// changed unless the corresponding logging code is updated.
constexpr int kWebrtcPixelsBuckets[] = …;
// The boundaries between buckets are calculated as the point between the two
// buckets.
constexpr int kWebrtcPixelsBoundaries[] = …;
// Static assert to make sure that `kWebrtcPixelsBoundaries[]` is updated if new
// pixel sizes are added to kWebrtcPixelsBuckets[]`.
static_assert …;

}  //  namespace

namespace media {

gfx::Size GetSizeBucket(const gfx::Size& raw_size) { … }

int GetFpsBucket(double raw_fps) { … }

int GetWebrtcPixelsBucket(int pixels) { … }

int GetWebrtcPixelsBucketIndex(int pixels) { … }

}  // namespace media