blob: 2f92095b2b3daa554fbd99772f1314479f60beac [file] [log] [blame]
* 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 "video/adaptation/bitrate_constraint.h"
#include <utility>
#include <vector>
#include "api/sequence_checker.h"
#include "call/adaptation/video_stream_adapter.h"
#include "video/adaptation/video_stream_encoder_resource_manager.h"
namespace webrtc {
: encoder_settings_(absl::nullopt),
encoder_target_bitrate_bps_(absl::nullopt) {
void BitrateConstraint::OnEncoderSettingsUpdated(
absl::optional<EncoderSettings> encoder_settings) {
encoder_settings_ = std::move(encoder_settings);
void BitrateConstraint::OnEncoderTargetBitrateUpdated(
absl::optional<uint32_t> encoder_target_bitrate_bps) {
encoder_target_bitrate_bps_ = std::move(encoder_target_bitrate_bps);
// Checks if resolution is allowed to adapt up based on the current bitrate and
// ResolutionBitrateLimits.min_start_bitrate_bps for the next higher resolution.
// Bitrate limits usage is restricted to a single active stream/layer (e.g. when
// quality scaling is enabled).
bool BitrateConstraint::IsAdaptationUpAllowed(
const VideoStreamInputState& input_state,
const VideoSourceRestrictions& restrictions_before,
const VideoSourceRestrictions& restrictions_after) const {
// Make sure bitrate limits are not violated.
if (DidIncreaseResolution(restrictions_before, restrictions_after)) {
if (!encoder_settings_.has_value()) {
return true;
uint32_t bitrate_bps = encoder_target_bitrate_bps_.value_or(0);
if (bitrate_bps == 0) {
return true;
if (VideoStreamEncoderResourceManager::IsSimulcastOrMultipleSpatialLayers(
encoder_settings_->video_codec())) {
// Resolution bitrate limits usage is restricted to singlecast.
return true;
absl::optional<int> current_frame_size_px =
if (!current_frame_size_px.has_value()) {
return true;
absl::optional<VideoEncoder::ResolutionBitrateLimits> bitrate_limits =
// Need some sort of expected resulting pixels to be used
// instead of unrestricted.
if (bitrate_limits.has_value()) {
RTC_DCHECK_GE(bitrate_limits->frame_size_pixels, *current_frame_size_px);
return bitrate_bps >=
return true;
} // namespace webrtc