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/*
* Copyright 2020 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "call/adaptation/video_source_restrictions.h"
#include <limits>
#include "rtc_base/checks.h"
namespace webrtc {
VideoSourceRestrictions::VideoSourceRestrictions()
: max_pixels_per_frame_(absl::nullopt),
target_pixels_per_frame_(absl::nullopt),
max_frame_rate_(absl::nullopt) {}
VideoSourceRestrictions::VideoSourceRestrictions(
absl::optional<size_t> max_pixels_per_frame,
absl::optional<size_t> target_pixels_per_frame,
absl::optional<double> max_frame_rate)
: max_pixels_per_frame_(std::move(max_pixels_per_frame)),
target_pixels_per_frame_(std::move(target_pixels_per_frame)),
max_frame_rate_(std::move(max_frame_rate)) {
RTC_DCHECK(!max_pixels_per_frame_.has_value() ||
max_pixels_per_frame_.value() <
static_cast<size_t>(std::numeric_limits<int>::max()));
RTC_DCHECK(!max_frame_rate_.has_value() ||
max_frame_rate_.value() < std::numeric_limits<int>::max());
RTC_DCHECK(!max_frame_rate_.has_value() || max_frame_rate_.value() > 0.0);
}
const absl::optional<size_t>& VideoSourceRestrictions::max_pixels_per_frame()
const {
return max_pixels_per_frame_;
}
const absl::optional<size_t>& VideoSourceRestrictions::target_pixels_per_frame()
const {
return target_pixels_per_frame_;
}
const absl::optional<double>& VideoSourceRestrictions::max_frame_rate() const {
return max_frame_rate_;
}
void VideoSourceRestrictions::set_max_pixels_per_frame(
absl::optional<size_t> max_pixels_per_frame) {
max_pixels_per_frame_ = std::move(max_pixels_per_frame);
}
void VideoSourceRestrictions::set_target_pixels_per_frame(
absl::optional<size_t> target_pixels_per_frame) {
target_pixels_per_frame_ = std::move(target_pixels_per_frame);
}
void VideoSourceRestrictions::set_max_frame_rate(
absl::optional<double> max_frame_rate) {
max_frame_rate_ = std::move(max_frame_rate);
}
bool DidRestrictionsIncrease(VideoSourceRestrictions before,
VideoSourceRestrictions after) {
bool decreased_resolution = DidDecreaseResolution(before, after);
bool decreased_framerate = DidDecreaseFrameRate(before, after);
bool same_resolution =
before.max_pixels_per_frame() == after.max_pixels_per_frame();
bool same_framerate = before.max_frame_rate() == after.max_frame_rate();
return (decreased_resolution && decreased_framerate) ||
(decreased_resolution && same_framerate) ||
(same_resolution && decreased_framerate);
}
bool DidRestrictionsDecrease(VideoSourceRestrictions before,
VideoSourceRestrictions after) {
bool increased_resolution = DidIncreaseResolution(before, after);
bool increased_framerate = DidIncreaseFrameRate(before, after);
bool same_resolution =
before.max_pixels_per_frame() == after.max_pixels_per_frame();
bool same_framerate = before.max_frame_rate() == after.max_frame_rate();
return (increased_resolution && increased_framerate) ||
(increased_resolution && same_framerate) ||
(same_resolution && increased_framerate);
}
bool DidIncreaseResolution(VideoSourceRestrictions restrictions_before,
VideoSourceRestrictions restrictions_after) {
if (!restrictions_before.max_pixels_per_frame().has_value())
return false;
if (!restrictions_after.max_pixels_per_frame().has_value())
return true;
return restrictions_after.max_pixels_per_frame().value() >
restrictions_before.max_pixels_per_frame().value();
}
bool DidDecreaseResolution(VideoSourceRestrictions restrictions_before,
VideoSourceRestrictions restrictions_after) {
if (!restrictions_after.max_pixels_per_frame().has_value())
return false;
if (!restrictions_before.max_pixels_per_frame().has_value())
return true;
return restrictions_after.max_pixels_per_frame().value() <
restrictions_before.max_pixels_per_frame().value();
}
bool DidIncreaseFrameRate(VideoSourceRestrictions restrictions_before,
VideoSourceRestrictions restrictions_after) {
if (!restrictions_before.max_frame_rate().has_value())
return false;
if (!restrictions_after.max_frame_rate().has_value())
return true;
return restrictions_after.max_frame_rate().value() >
restrictions_before.max_frame_rate().value();
}
bool DidDecreaseFrameRate(VideoSourceRestrictions restrictions_before,
VideoSourceRestrictions restrictions_after) {
if (!restrictions_after.max_frame_rate().has_value())
return false;
if (!restrictions_before.max_frame_rate().has_value())
return true;
return restrictions_after.max_frame_rate().value() <
restrictions_before.max_frame_rate().value();
}
} // namespace webrtc
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