modules/video_coding refactorings
The main purpose was the interface-> include rename, but other files were also moved, eliminating the "main" dir. To avoid breaking downstream, the "interface" directories were copied into a new "video_coding/include" dir. The old headers got pragma warnings added about deprecation (a very short deprecation since I plan to remove them as soon downstream is updated). Other files also moved: video_coding/main/source -> video_coding video_coding/main/test -> video_coding/test BUG=webrtc:5095 TESTED=Passing compile-trybots with --clobber flag: git cl try --clobber --bot=win_compile_rel --bot=linux_compile_rel --bot=android_compile_rel --bot=mac_compile_rel --bot=ios_rel --bot=linux_gn_rel --bot=win_x64_gn_rel --bot=mac_x64_gn_rel --bot=android_gn_rel -m tryserver.webrtc R=stefan@webrtc.org, tommi@webrtc.org Review URL: https://codereview.webrtc.org/1417283007 . Cr-Commit-Position: refs/heads/master@{#10694}
This commit is contained in:
Henrik Kjellander
648
webrtc/modules/video_coding/media_optimization.cc
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648
webrtc/modules/video_coding/media_optimization.cc
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@ -0,0 +1,648 @@
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/*
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* Copyright (c) 2012 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 "webrtc/modules/video_coding/media_optimization.h"
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#include "webrtc/base/logging.h"
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#include "webrtc/modules/video_coding/content_metrics_processing.h"
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#include "webrtc/modules/video_coding/qm_select.h"
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#include "webrtc/modules/video_coding/utility/include/frame_dropper.h"
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#include "webrtc/system_wrappers/include/clock.h"
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namespace webrtc {
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namespace media_optimization {
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namespace {
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void UpdateProtectionCallback(
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VCMProtectionMethod* selected_method,
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uint32_t* video_rate_bps,
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uint32_t* nack_overhead_rate_bps,
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uint32_t* fec_overhead_rate_bps,
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VCMProtectionCallback* video_protection_callback) {
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FecProtectionParams delta_fec_params;
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FecProtectionParams key_fec_params;
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// Get the FEC code rate for Key frames (set to 0 when NA).
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key_fec_params.fec_rate = selected_method->RequiredProtectionFactorK();
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// Get the FEC code rate for Delta frames (set to 0 when NA).
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delta_fec_params.fec_rate = selected_method->RequiredProtectionFactorD();
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// Get the FEC-UEP protection status for Key frames: UEP on/off.
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key_fec_params.use_uep_protection = selected_method->RequiredUepProtectionK();
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// Get the FEC-UEP protection status for Delta frames: UEP on/off.
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delta_fec_params.use_uep_protection =
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selected_method->RequiredUepProtectionD();
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// The RTP module currently requires the same |max_fec_frames| for both
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// key and delta frames.
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delta_fec_params.max_fec_frames = selected_method->MaxFramesFec();
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key_fec_params.max_fec_frames = selected_method->MaxFramesFec();
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// Set the FEC packet mask type. |kFecMaskBursty| is more effective for
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// consecutive losses and little/no packet re-ordering. As we currently
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// do not have feedback data on the degree of correlated losses and packet
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// re-ordering, we keep default setting to |kFecMaskRandom| for now.
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delta_fec_params.fec_mask_type = kFecMaskRandom;
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key_fec_params.fec_mask_type = kFecMaskRandom;
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// TODO(Marco): Pass FEC protection values per layer.
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video_protection_callback->ProtectionRequest(&delta_fec_params,
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&key_fec_params,
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video_rate_bps,
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nack_overhead_rate_bps,
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fec_overhead_rate_bps);
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}
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} // namespace
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struct MediaOptimization::EncodedFrameSample {
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EncodedFrameSample(size_t size_bytes,
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uint32_t timestamp,
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int64_t time_complete_ms)
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: size_bytes(size_bytes),
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timestamp(timestamp),
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time_complete_ms(time_complete_ms) {}
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size_t size_bytes;
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uint32_t timestamp;
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int64_t time_complete_ms;
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};
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MediaOptimization::MediaOptimization(Clock* clock)
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: crit_sect_(CriticalSectionWrapper::CreateCriticalSection()),
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clock_(clock),
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max_bit_rate_(0),
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send_codec_type_(kVideoCodecUnknown),
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codec_width_(0),
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codec_height_(0),
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user_frame_rate_(0),
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frame_dropper_(new FrameDropper),
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loss_prot_logic_(
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new VCMLossProtectionLogic(clock_->TimeInMilliseconds())),
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fraction_lost_(0),
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send_statistics_zero_encode_(0),
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max_payload_size_(1460),
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video_target_bitrate_(0),
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incoming_frame_rate_(0),
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enable_qm_(false),
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encoded_frame_samples_(),
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avg_sent_bit_rate_bps_(0),
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avg_sent_framerate_(0),
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key_frame_cnt_(0),
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delta_frame_cnt_(0),
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content_(new VCMContentMetricsProcessing()),
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qm_resolution_(new VCMQmResolution()),
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last_qm_update_time_(0),
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last_change_time_(0),
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num_layers_(0),
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suspension_enabled_(false),
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video_suspended_(false),
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suspension_threshold_bps_(0),
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suspension_window_bps_(0) {
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memset(send_statistics_, 0, sizeof(send_statistics_));
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memset(incoming_frame_times_, -1, sizeof(incoming_frame_times_));
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}
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MediaOptimization::~MediaOptimization(void) {
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loss_prot_logic_->Release();
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}
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void MediaOptimization::Reset() {
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CriticalSectionScoped lock(crit_sect_.get());
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SetEncodingDataInternal(
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kVideoCodecUnknown, 0, 0, 0, 0, 0, 0, max_payload_size_);
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memset(incoming_frame_times_, -1, sizeof(incoming_frame_times_));
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incoming_frame_rate_ = 0.0;
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frame_dropper_->Reset();
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loss_prot_logic_->Reset(clock_->TimeInMilliseconds());
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frame_dropper_->SetRates(0, 0);
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content_->Reset();
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qm_resolution_->Reset();
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loss_prot_logic_->UpdateFrameRate(incoming_frame_rate_);
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loss_prot_logic_->Reset(clock_->TimeInMilliseconds());
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send_statistics_zero_encode_ = 0;
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video_target_bitrate_ = 0;
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codec_width_ = 0;
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codec_height_ = 0;
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user_frame_rate_ = 0;
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key_frame_cnt_ = 0;
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delta_frame_cnt_ = 0;
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last_qm_update_time_ = 0;
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last_change_time_ = 0;
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encoded_frame_samples_.clear();
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avg_sent_bit_rate_bps_ = 0;
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num_layers_ = 1;
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}
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void MediaOptimization::SetEncodingData(VideoCodecType send_codec_type,
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int32_t max_bit_rate,
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uint32_t target_bitrate,
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uint16_t width,
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uint16_t height,
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uint32_t frame_rate,
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int num_layers,
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int32_t mtu) {
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CriticalSectionScoped lock(crit_sect_.get());
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SetEncodingDataInternal(send_codec_type,
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max_bit_rate,
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frame_rate,
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target_bitrate,
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width,
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height,
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num_layers,
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mtu);
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}
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void MediaOptimization::SetEncodingDataInternal(VideoCodecType send_codec_type,
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int32_t max_bit_rate,
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uint32_t frame_rate,
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uint32_t target_bitrate,
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uint16_t width,
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uint16_t height,
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int num_layers,
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int32_t mtu) {
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// Everything codec specific should be reset here since this means the codec
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// has changed. If native dimension values have changed, then either user
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// initiated change, or QM initiated change. Will be able to determine only
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// after the processing of the first frame.
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last_change_time_ = clock_->TimeInMilliseconds();
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content_->Reset();
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content_->UpdateFrameRate(frame_rate);
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max_bit_rate_ = max_bit_rate;
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send_codec_type_ = send_codec_type;
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video_target_bitrate_ = target_bitrate;
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float target_bitrate_kbps = static_cast<float>(target_bitrate) / 1000.0f;
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loss_prot_logic_->UpdateBitRate(target_bitrate_kbps);
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loss_prot_logic_->UpdateFrameRate(static_cast<float>(frame_rate));
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loss_prot_logic_->UpdateFrameSize(width, height);
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loss_prot_logic_->UpdateNumLayers(num_layers);
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frame_dropper_->Reset();
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frame_dropper_->SetRates(target_bitrate_kbps, static_cast<float>(frame_rate));
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user_frame_rate_ = static_cast<float>(frame_rate);
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codec_width_ = width;
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codec_height_ = height;
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num_layers_ = (num_layers <= 1) ? 1 : num_layers; // Can also be zero.
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max_payload_size_ = mtu;
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qm_resolution_->Initialize(target_bitrate_kbps,
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user_frame_rate_,
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codec_width_,
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codec_height_,
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num_layers_);
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}
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uint32_t MediaOptimization::SetTargetRates(
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uint32_t target_bitrate,
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uint8_t fraction_lost,
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int64_t round_trip_time_ms,
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VCMProtectionCallback* protection_callback,
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VCMQMSettingsCallback* qmsettings_callback) {
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CriticalSectionScoped lock(crit_sect_.get());
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VCMProtectionMethod* selected_method = loss_prot_logic_->SelectedMethod();
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float target_bitrate_kbps = static_cast<float>(target_bitrate) / 1000.0f;
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loss_prot_logic_->UpdateBitRate(target_bitrate_kbps);
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loss_prot_logic_->UpdateRtt(round_trip_time_ms);
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// Get frame rate for encoder: this is the actual/sent frame rate.
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float actual_frame_rate = SentFrameRateInternal();
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// Sanity check.
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if (actual_frame_rate < 1.0) {
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actual_frame_rate = 1.0;
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}
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// Update frame rate for the loss protection logic class: frame rate should
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// be the actual/sent rate.
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loss_prot_logic_->UpdateFrameRate(actual_frame_rate);
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fraction_lost_ = fraction_lost;
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// Returns the filtered packet loss, used for the protection setting.
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// The filtered loss may be the received loss (no filter), or some
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// filtered value (average or max window filter).
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// Use max window filter for now.
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FilterPacketLossMode filter_mode = kMaxFilter;
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uint8_t packet_loss_enc = loss_prot_logic_->FilteredLoss(
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clock_->TimeInMilliseconds(), filter_mode, fraction_lost);
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// For now use the filtered loss for computing the robustness settings.
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loss_prot_logic_->UpdateFilteredLossPr(packet_loss_enc);
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// Rate cost of the protection methods.
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float protection_overhead_rate = 0.0f;
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// Update protection settings, when applicable.
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float sent_video_rate_kbps = 0.0f;
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if (loss_prot_logic_->SelectedType() != kNone) {
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// Update protection method with content metrics.
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selected_method->UpdateContentMetrics(content_->ShortTermAvgData());
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// Update method will compute the robustness settings for the given
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// protection method and the overhead cost
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// the protection method is set by the user via SetVideoProtection.
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loss_prot_logic_->UpdateMethod();
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// Update protection callback with protection settings.
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uint32_t sent_video_rate_bps = 0;
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uint32_t sent_nack_rate_bps = 0;
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uint32_t sent_fec_rate_bps = 0;
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// Get the bit cost of protection method, based on the amount of
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// overhead data actually transmitted (including headers) the last
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// second.
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if (protection_callback) {
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UpdateProtectionCallback(selected_method,
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&sent_video_rate_bps,
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&sent_nack_rate_bps,
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&sent_fec_rate_bps,
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protection_callback);
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}
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uint32_t sent_total_rate_bps =
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sent_video_rate_bps + sent_nack_rate_bps + sent_fec_rate_bps;
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// Estimate the overhead costs of the next second as staying the same
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// wrt the source bitrate.
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if (sent_total_rate_bps > 0) {
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protection_overhead_rate =
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static_cast<float>(sent_nack_rate_bps + sent_fec_rate_bps) /
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sent_total_rate_bps;
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}
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// Cap the overhead estimate to 50%.
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if (protection_overhead_rate > 0.5)
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protection_overhead_rate = 0.5;
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// Get the effective packet loss for encoder ER when applicable. Should be
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// passed to encoder via fraction_lost.
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packet_loss_enc = selected_method->RequiredPacketLossER();
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sent_video_rate_kbps = static_cast<float>(sent_video_rate_bps) / 1000.0f;
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}
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// Source coding rate: total rate - protection overhead.
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video_target_bitrate_ = target_bitrate * (1.0 - protection_overhead_rate);
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// Cap target video bitrate to codec maximum.
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if (max_bit_rate_ > 0 && video_target_bitrate_ > max_bit_rate_) {
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video_target_bitrate_ = max_bit_rate_;
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}
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// Update encoding rates following protection settings.
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float target_video_bitrate_kbps =
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static_cast<float>(video_target_bitrate_) / 1000.0f;
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frame_dropper_->SetRates(target_video_bitrate_kbps, incoming_frame_rate_);
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if (enable_qm_ && qmsettings_callback) {
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// Update QM with rates.
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qm_resolution_->UpdateRates(target_video_bitrate_kbps,
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sent_video_rate_kbps,
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incoming_frame_rate_,
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fraction_lost_);
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// Check for QM selection.
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bool select_qm = CheckStatusForQMchange();
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if (select_qm) {
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SelectQuality(qmsettings_callback);
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}
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// Reset the short-term averaged content data.
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content_->ResetShortTermAvgData();
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}
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CheckSuspendConditions();
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return video_target_bitrate_;
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}
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void MediaOptimization::SetProtectionMethod(VCMProtectionMethodEnum method) {
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CriticalSectionScoped lock(crit_sect_.get());
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loss_prot_logic_->SetMethod(method);
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}
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uint32_t MediaOptimization::InputFrameRate() {
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CriticalSectionScoped lock(crit_sect_.get());
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return InputFrameRateInternal();
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}
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uint32_t MediaOptimization::InputFrameRateInternal() {
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ProcessIncomingFrameRate(clock_->TimeInMilliseconds());
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return uint32_t(incoming_frame_rate_ + 0.5f);
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}
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uint32_t MediaOptimization::SentFrameRate() {
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CriticalSectionScoped lock(crit_sect_.get());
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return SentFrameRateInternal();
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}
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uint32_t MediaOptimization::SentFrameRateInternal() {
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PurgeOldFrameSamples(clock_->TimeInMilliseconds());
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UpdateSentFramerate();
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return avg_sent_framerate_;
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}
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uint32_t MediaOptimization::SentBitRate() {
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CriticalSectionScoped lock(crit_sect_.get());
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const int64_t now_ms = clock_->TimeInMilliseconds();
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PurgeOldFrameSamples(now_ms);
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UpdateSentBitrate(now_ms);
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return avg_sent_bit_rate_bps_;
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}
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int32_t MediaOptimization::UpdateWithEncodedData(
|
||||
const EncodedImage& encoded_image) {
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size_t encoded_length = encoded_image._length;
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uint32_t timestamp = encoded_image._timeStamp;
|
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CriticalSectionScoped lock(crit_sect_.get());
|
||||
const int64_t now_ms = clock_->TimeInMilliseconds();
|
||||
PurgeOldFrameSamples(now_ms);
|
||||
if (encoded_frame_samples_.size() > 0 &&
|
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encoded_frame_samples_.back().timestamp == timestamp) {
|
||||
// Frames having the same timestamp are generated from the same input
|
||||
// frame. We don't want to double count them, but only increment the
|
||||
// size_bytes.
|
||||
encoded_frame_samples_.back().size_bytes += encoded_length;
|
||||
encoded_frame_samples_.back().time_complete_ms = now_ms;
|
||||
} else {
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||||
encoded_frame_samples_.push_back(
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||||
EncodedFrameSample(encoded_length, timestamp, now_ms));
|
||||
}
|
||||
UpdateSentBitrate(now_ms);
|
||||
UpdateSentFramerate();
|
||||
if (encoded_length > 0) {
|
||||
const bool delta_frame = encoded_image._frameType != kVideoFrameKey;
|
||||
|
||||
frame_dropper_->Fill(encoded_length, delta_frame);
|
||||
if (max_payload_size_ > 0 && encoded_length > 0) {
|
||||
const float min_packets_per_frame =
|
||||
encoded_length / static_cast<float>(max_payload_size_);
|
||||
if (delta_frame) {
|
||||
loss_prot_logic_->UpdatePacketsPerFrame(min_packets_per_frame,
|
||||
clock_->TimeInMilliseconds());
|
||||
} else {
|
||||
loss_prot_logic_->UpdatePacketsPerFrameKey(
|
||||
min_packets_per_frame, clock_->TimeInMilliseconds());
|
||||
}
|
||||
|
||||
if (enable_qm_) {
|
||||
// Update quality select with encoded length.
|
||||
qm_resolution_->UpdateEncodedSize(encoded_length);
|
||||
}
|
||||
}
|
||||
if (!delta_frame && encoded_length > 0) {
|
||||
loss_prot_logic_->UpdateKeyFrameSize(static_cast<float>(encoded_length));
|
||||
}
|
||||
|
||||
// Updating counters.
|
||||
if (delta_frame) {
|
||||
delta_frame_cnt_++;
|
||||
} else {
|
||||
key_frame_cnt_++;
|
||||
}
|
||||
}
|
||||
|
||||
return VCM_OK;
|
||||
}
|
||||
|
||||
void MediaOptimization::EnableQM(bool enable) {
|
||||
CriticalSectionScoped lock(crit_sect_.get());
|
||||
enable_qm_ = enable;
|
||||
}
|
||||
|
||||
void MediaOptimization::EnableFrameDropper(bool enable) {
|
||||
CriticalSectionScoped lock(crit_sect_.get());
|
||||
frame_dropper_->Enable(enable);
|
||||
}
|
||||
|
||||
void MediaOptimization::SuspendBelowMinBitrate(int threshold_bps,
|
||||
int window_bps) {
|
||||
CriticalSectionScoped lock(crit_sect_.get());
|
||||
assert(threshold_bps > 0 && window_bps >= 0);
|
||||
suspension_threshold_bps_ = threshold_bps;
|
||||
suspension_window_bps_ = window_bps;
|
||||
suspension_enabled_ = true;
|
||||
video_suspended_ = false;
|
||||
}
|
||||
|
||||
bool MediaOptimization::IsVideoSuspended() const {
|
||||
CriticalSectionScoped lock(crit_sect_.get());
|
||||
return video_suspended_;
|
||||
}
|
||||
|
||||
bool MediaOptimization::DropFrame() {
|
||||
CriticalSectionScoped lock(crit_sect_.get());
|
||||
UpdateIncomingFrameRate();
|
||||
// Leak appropriate number of bytes.
|
||||
frame_dropper_->Leak((uint32_t)(InputFrameRateInternal() + 0.5f));
|
||||
if (video_suspended_) {
|
||||
return true; // Drop all frames when muted.
|
||||
}
|
||||
return frame_dropper_->DropFrame();
|
||||
}
|
||||
|
||||
void MediaOptimization::UpdateContentData(
|
||||
const VideoContentMetrics* content_metrics) {
|
||||
CriticalSectionScoped lock(crit_sect_.get());
|
||||
// Updating content metrics.
|
||||
if (content_metrics == NULL) {
|
||||
// Disable QM if metrics are NULL.
|
||||
enable_qm_ = false;
|
||||
qm_resolution_->Reset();
|
||||
} else {
|
||||
content_->UpdateContentData(content_metrics);
|
||||
}
|
||||
}
|
||||
|
||||
void MediaOptimization::UpdateIncomingFrameRate() {
|
||||
int64_t now = clock_->TimeInMilliseconds();
|
||||
if (incoming_frame_times_[0] == 0) {
|
||||
// No shifting if this is the first time.
|
||||
} else {
|
||||
// Shift all times one step.
|
||||
for (int32_t i = (kFrameCountHistorySize - 2); i >= 0; i--) {
|
||||
incoming_frame_times_[i + 1] = incoming_frame_times_[i];
|
||||
}
|
||||
}
|
||||
incoming_frame_times_[0] = now;
|
||||
ProcessIncomingFrameRate(now);
|
||||
}
|
||||
|
||||
int32_t MediaOptimization::SelectQuality(
|
||||
VCMQMSettingsCallback* video_qmsettings_callback) {
|
||||
// Reset quantities for QM select.
|
||||
qm_resolution_->ResetQM();
|
||||
|
||||
// Update QM will long-term averaged content metrics.
|
||||
qm_resolution_->UpdateContent(content_->LongTermAvgData());
|
||||
|
||||
// Select quality mode.
|
||||
VCMResolutionScale* qm = NULL;
|
||||
int32_t ret = qm_resolution_->SelectResolution(&qm);
|
||||
if (ret < 0) {
|
||||
return ret;
|
||||
}
|
||||
|
||||
// Check for updates to spatial/temporal modes.
|
||||
QMUpdate(qm, video_qmsettings_callback);
|
||||
|
||||
// Reset all the rate and related frame counters quantities.
|
||||
qm_resolution_->ResetRates();
|
||||
|
||||
// Reset counters.
|
||||
last_qm_update_time_ = clock_->TimeInMilliseconds();
|
||||
|
||||
// Reset content metrics.
|
||||
content_->Reset();
|
||||
|
||||
return VCM_OK;
|
||||
}
|
||||
|
||||
void MediaOptimization::PurgeOldFrameSamples(int64_t now_ms) {
|
||||
while (!encoded_frame_samples_.empty()) {
|
||||
if (now_ms - encoded_frame_samples_.front().time_complete_ms >
|
||||
kBitrateAverageWinMs) {
|
||||
encoded_frame_samples_.pop_front();
|
||||
} else {
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void MediaOptimization::UpdateSentBitrate(int64_t now_ms) {
|
||||
if (encoded_frame_samples_.empty()) {
|
||||
avg_sent_bit_rate_bps_ = 0;
|
||||
return;
|
||||
}
|
||||
size_t framesize_sum = 0;
|
||||
for (FrameSampleList::iterator it = encoded_frame_samples_.begin();
|
||||
it != encoded_frame_samples_.end();
|
||||
++it) {
|
||||
framesize_sum += it->size_bytes;
|
||||
}
|
||||
float denom = static_cast<float>(
|
||||
now_ms - encoded_frame_samples_.front().time_complete_ms);
|
||||
if (denom >= 1.0f) {
|
||||
avg_sent_bit_rate_bps_ =
|
||||
static_cast<uint32_t>(framesize_sum * 8.0f * 1000.0f / denom + 0.5f);
|
||||
} else {
|
||||
avg_sent_bit_rate_bps_ = framesize_sum * 8;
|
||||
}
|
||||
}
|
||||
|
||||
void MediaOptimization::UpdateSentFramerate() {
|
||||
if (encoded_frame_samples_.size() <= 1) {
|
||||
avg_sent_framerate_ = encoded_frame_samples_.size();
|
||||
return;
|
||||
}
|
||||
int denom = encoded_frame_samples_.back().timestamp -
|
||||
encoded_frame_samples_.front().timestamp;
|
||||
if (denom > 0) {
|
||||
avg_sent_framerate_ =
|
||||
(90000 * (encoded_frame_samples_.size() - 1) + denom / 2) / denom;
|
||||
} else {
|
||||
avg_sent_framerate_ = encoded_frame_samples_.size();
|
||||
}
|
||||
}
|
||||
|
||||
bool MediaOptimization::QMUpdate(
|
||||
VCMResolutionScale* qm,
|
||||
VCMQMSettingsCallback* video_qmsettings_callback) {
|
||||
// Check for no change.
|
||||
if (!qm->change_resolution_spatial && !qm->change_resolution_temporal) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Check for change in frame rate.
|
||||
if (qm->change_resolution_temporal) {
|
||||
incoming_frame_rate_ = qm->frame_rate;
|
||||
// Reset frame rate estimate.
|
||||
memset(incoming_frame_times_, -1, sizeof(incoming_frame_times_));
|
||||
}
|
||||
|
||||
// Check for change in frame size.
|
||||
if (qm->change_resolution_spatial) {
|
||||
codec_width_ = qm->codec_width;
|
||||
codec_height_ = qm->codec_height;
|
||||
}
|
||||
|
||||
LOG(LS_INFO) << "Media optimizer requests the video resolution to be changed "
|
||||
"to " << qm->codec_width << "x" << qm->codec_height << "@"
|
||||
<< qm->frame_rate;
|
||||
|
||||
// Update VPM with new target frame rate and frame size.
|
||||
// Note: use |qm->frame_rate| instead of |_incoming_frame_rate| for updating
|
||||
// target frame rate in VPM frame dropper. The quantity |_incoming_frame_rate|
|
||||
// will vary/fluctuate, and since we don't want to change the state of the
|
||||
// VPM frame dropper, unless a temporal action was selected, we use the
|
||||
// quantity |qm->frame_rate| for updating.
|
||||
video_qmsettings_callback->SetVideoQMSettings(
|
||||
qm->frame_rate, codec_width_, codec_height_);
|
||||
content_->UpdateFrameRate(qm->frame_rate);
|
||||
qm_resolution_->UpdateCodecParameters(
|
||||
qm->frame_rate, codec_width_, codec_height_);
|
||||
return true;
|
||||
}
|
||||
|
||||
// Check timing constraints and look for significant change in:
|
||||
// (1) scene content,
|
||||
// (2) target bit rate.
|
||||
bool MediaOptimization::CheckStatusForQMchange() {
|
||||
bool status = true;
|
||||
|
||||
// Check that we do not call QMSelect too often, and that we waited some time
|
||||
// (to sample the metrics) from the event last_change_time
|
||||
// last_change_time is the time where user changed the size/rate/frame rate
|
||||
// (via SetEncodingData).
|
||||
int64_t now = clock_->TimeInMilliseconds();
|
||||
if ((now - last_qm_update_time_) < kQmMinIntervalMs ||
|
||||
(now - last_change_time_) < kQmMinIntervalMs) {
|
||||
status = false;
|
||||
}
|
||||
|
||||
return status;
|
||||
}
|
||||
|
||||
// Allowing VCM to keep track of incoming frame rate.
|
||||
void MediaOptimization::ProcessIncomingFrameRate(int64_t now) {
|
||||
int32_t num = 0;
|
||||
int32_t nr_of_frames = 0;
|
||||
for (num = 1; num < (kFrameCountHistorySize - 1); ++num) {
|
||||
if (incoming_frame_times_[num] <= 0 ||
|
||||
// don't use data older than 2 s
|
||||
now - incoming_frame_times_[num] > kFrameHistoryWinMs) {
|
||||
break;
|
||||
} else {
|
||||
nr_of_frames++;
|
||||
}
|
||||
}
|
||||
if (num > 1) {
|
||||
const int64_t diff =
|
||||
incoming_frame_times_[0] - incoming_frame_times_[num - 1];
|
||||
incoming_frame_rate_ = 0.0; // No frame rate estimate available.
|
||||
if (diff > 0) {
|
||||
incoming_frame_rate_ = nr_of_frames * 1000.0f / static_cast<float>(diff);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void MediaOptimization::CheckSuspendConditions() {
|
||||
// Check conditions for SuspendBelowMinBitrate. |video_target_bitrate_| is in
|
||||
// bps.
|
||||
if (suspension_enabled_) {
|
||||
if (!video_suspended_) {
|
||||
// Check if we just went below the threshold.
|
||||
if (video_target_bitrate_ < suspension_threshold_bps_) {
|
||||
video_suspended_ = true;
|
||||
}
|
||||
} else {
|
||||
// Video is already suspended. Check if we just went over the threshold
|
||||
// with a margin.
|
||||
if (video_target_bitrate_ >
|
||||
suspension_threshold_bps_ + suspension_window_bps_) {
|
||||
video_suspended_ = false;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
} // namespace media_optimization
|
||||
} // namespace webrtc
|
||||
Reference in New Issue
Block a user