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https://github.com/mollyim/webrtc.git
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258e9899f4
Bug: none Change-Id: I049dd0924adc43ce249a8eda63cdcb13da42b030 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/208541 Reviewed-by: Sergey Silkin <ssilkin@webrtc.org> Commit-Queue: Åsa Persson <asapersson@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33343}
108 lines
4 KiB
C++
108 lines
4 KiB
C++
/*
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* Copyright 2021 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "rtc_base/experiments/encoder_info_settings.h"
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#include <stdio.h>
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#include "rtc_base/experiments/field_trial_list.h"
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#include "rtc_base/logging.h"
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#include "system_wrappers/include/field_trial.h"
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namespace webrtc {
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namespace {
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std::vector<VideoEncoder::ResolutionBitrateLimits> ToResolutionBitrateLimits(
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const std::vector<EncoderInfoSettings::BitrateLimit>& limits) {
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std::vector<VideoEncoder::ResolutionBitrateLimits> result;
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for (const auto& limit : limits) {
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result.push_back(VideoEncoder::ResolutionBitrateLimits(
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limit.frame_size_pixels, limit.min_start_bitrate_bps,
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limit.min_bitrate_bps, limit.max_bitrate_bps));
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}
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return result;
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}
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} // namespace
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// Default bitrate limits for simulcast with one active stream:
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// {frame_size_pixels, min_start_bitrate_bps, min_bitrate_bps, max_bitrate_bps}.
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std::vector<VideoEncoder::ResolutionBitrateLimits>
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EncoderInfoSettings::GetDefaultSinglecastBitrateLimits() {
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return {{320 * 180, 0, 30000, 300000},
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{480 * 270, 200000, 30000, 500000},
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{640 * 360, 300000, 30000, 800000},
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{960 * 540, 500000, 30000, 1500000},
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{1280 * 720, 900000, 30000, 2500000}};
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}
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absl::optional<VideoEncoder::ResolutionBitrateLimits>
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EncoderInfoSettings::GetDefaultSinglecastBitrateLimitsForResolution(
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int frame_size_pixels) {
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VideoEncoder::EncoderInfo info;
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info.resolution_bitrate_limits = GetDefaultSinglecastBitrateLimits();
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return info.GetEncoderBitrateLimitsForResolution(frame_size_pixels);
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}
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EncoderInfoSettings::EncoderInfoSettings(std::string name)
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: requested_resolution_alignment_("requested_resolution_alignment"),
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apply_alignment_to_all_simulcast_layers_(
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"apply_alignment_to_all_simulcast_layers") {
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FieldTrialStructList<BitrateLimit> bitrate_limits(
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{FieldTrialStructMember(
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"frame_size_pixels",
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[](BitrateLimit* b) { return &b->frame_size_pixels; }),
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FieldTrialStructMember(
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"min_start_bitrate_bps",
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[](BitrateLimit* b) { return &b->min_start_bitrate_bps; }),
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FieldTrialStructMember(
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"min_bitrate_bps",
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[](BitrateLimit* b) { return &b->min_bitrate_bps; }),
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FieldTrialStructMember(
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"max_bitrate_bps",
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[](BitrateLimit* b) { return &b->max_bitrate_bps; })},
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{});
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if (field_trial::FindFullName(name).empty()) {
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// Encoder name not found, use common string applying to all encoders.
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name = "WebRTC-GetEncoderInfoOverride";
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}
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ParseFieldTrial({&bitrate_limits, &requested_resolution_alignment_,
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&apply_alignment_to_all_simulcast_layers_},
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field_trial::FindFullName(name));
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resolution_bitrate_limits_ = ToResolutionBitrateLimits(bitrate_limits.Get());
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}
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absl::optional<int> EncoderInfoSettings::requested_resolution_alignment()
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const {
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if (requested_resolution_alignment_ &&
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requested_resolution_alignment_.Value() < 1) {
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RTC_LOG(LS_WARNING) << "Unsupported alignment value, ignored.";
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return absl::nullopt;
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}
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return requested_resolution_alignment_.GetOptional();
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}
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EncoderInfoSettings::~EncoderInfoSettings() {}
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SimulcastEncoderAdapterEncoderInfoSettings::
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SimulcastEncoderAdapterEncoderInfoSettings()
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: EncoderInfoSettings(
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"WebRTC-SimulcastEncoderAdapter-GetEncoderInfoOverride") {}
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LibvpxVp8EncoderInfoSettings::LibvpxVp8EncoderInfoSettings()
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: EncoderInfoSettings("WebRTC-VP8-GetEncoderInfoOverride") {}
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LibvpxVp9EncoderInfoSettings::LibvpxVp9EncoderInfoSettings()
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: EncoderInfoSettings("WebRTC-VP9-GetEncoderInfoOverride") {}
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} // namespace webrtc
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