e449915455
Permits measuring encoding time even when performed on another thread, typically for hardware encoding, instead of assuming that encoding is blocking the calling thread. Permitted encoding time is increased for hardware encoders since they can be timed to keep 30fps, for instance, without indicating overload. Merges EncodingTimeObserver into EncodedFrameObserver to have one post-encode callback. BUG=webrtc:5042, webrtc:5132 R=asapersson@webrtc.org, mflodman@webrtc.org Review URL: https://codereview.webrtc.org/1569853002 . Cr-Commit-Position: refs/heads/master@{#11499}
131 lines
4.6 KiB
C++
131 lines
4.6 KiB
C++
/*
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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/video/video_capture_input.h"
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#include "webrtc/base/checks.h"
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#include "webrtc/base/logging.h"
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#include "webrtc/base/trace_event.h"
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#include "webrtc/modules/include/module_common_types.h"
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#include "webrtc/modules/video_capture/video_capture_factory.h"
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#include "webrtc/modules/video_processing/include/video_processing.h"
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#include "webrtc/modules/video_render/video_render_defines.h"
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#include "webrtc/system_wrappers/include/clock.h"
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#include "webrtc/system_wrappers/include/tick_util.h"
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#include "webrtc/video/overuse_frame_detector.h"
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#include "webrtc/video/send_statistics_proxy.h"
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#include "webrtc/video/vie_encoder.h"
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namespace webrtc {
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namespace internal {
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VideoCaptureInput::VideoCaptureInput(VideoCaptureCallback* frame_callback,
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VideoRenderer* local_renderer,
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SendStatisticsProxy* stats_proxy,
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OveruseFrameDetector* overuse_detector)
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: frame_callback_(frame_callback),
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local_renderer_(local_renderer),
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stats_proxy_(stats_proxy),
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encoder_thread_(EncoderThreadFunction, this, "EncoderThread"),
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capture_event_(false, false),
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stop_(0),
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last_captured_timestamp_(0),
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delta_ntp_internal_ms_(
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Clock::GetRealTimeClock()->CurrentNtpInMilliseconds() -
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TickTime::MillisecondTimestamp()),
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overuse_detector_(overuse_detector) {
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encoder_thread_.Start();
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encoder_thread_.SetPriority(rtc::kHighPriority);
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}
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VideoCaptureInput::~VideoCaptureInput() {
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// Stop the thread.
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rtc::AtomicOps::ReleaseStore(&stop_, 1);
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capture_event_.Set();
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encoder_thread_.Stop();
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}
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void VideoCaptureInput::IncomingCapturedFrame(const VideoFrame& video_frame) {
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// TODO(pbos): Remove local rendering, it should be handled by the client code
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// if required.
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if (local_renderer_)
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local_renderer_->RenderFrame(video_frame, 0);
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stats_proxy_->OnIncomingFrame(video_frame.width(), video_frame.height());
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VideoFrame incoming_frame = video_frame;
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if (incoming_frame.ntp_time_ms() != 0) {
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// If a NTP time stamp is set, this is the time stamp we will use.
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incoming_frame.set_render_time_ms(incoming_frame.ntp_time_ms() -
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delta_ntp_internal_ms_);
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} else { // NTP time stamp not set.
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int64_t render_time = incoming_frame.render_time_ms() != 0
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? incoming_frame.render_time_ms()
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: TickTime::MillisecondTimestamp();
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incoming_frame.set_render_time_ms(render_time);
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incoming_frame.set_ntp_time_ms(render_time + delta_ntp_internal_ms_);
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}
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// Convert NTP time, in ms, to RTP timestamp.
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const int kMsToRtpTimestamp = 90;
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incoming_frame.set_timestamp(
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kMsToRtpTimestamp * static_cast<uint32_t>(incoming_frame.ntp_time_ms()));
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rtc::CritScope lock(&crit_);
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if (incoming_frame.ntp_time_ms() <= last_captured_timestamp_) {
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// We don't allow the same capture time for two frames, drop this one.
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LOG(LS_WARNING) << "Same/old NTP timestamp ("
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<< incoming_frame.ntp_time_ms()
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<< " <= " << last_captured_timestamp_
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<< ") for incoming frame. Dropping.";
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return;
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}
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captured_frame_.ShallowCopy(incoming_frame);
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last_captured_timestamp_ = incoming_frame.ntp_time_ms();
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overuse_detector_->FrameCaptured(captured_frame_);
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TRACE_EVENT_ASYNC_BEGIN1("webrtc", "Video", video_frame.render_time_ms(),
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"render_time", video_frame.render_time_ms());
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capture_event_.Set();
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}
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bool VideoCaptureInput::EncoderThreadFunction(void* obj) {
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return static_cast<VideoCaptureInput*>(obj)->EncoderProcess();
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}
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bool VideoCaptureInput::EncoderProcess() {
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static const int kThreadWaitTimeMs = 100;
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if (capture_event_.Wait(kThreadWaitTimeMs)) {
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if (rtc::AtomicOps::AcquireLoad(&stop_))
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return false;
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VideoFrame deliver_frame;
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{
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rtc::CritScope lock(&crit_);
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if (!captured_frame_.IsZeroSize()) {
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deliver_frame = captured_frame_;
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captured_frame_.Reset();
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}
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}
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if (!deliver_frame.IsZeroSize()) {
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frame_callback_->DeliverFrame(deliver_frame);
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}
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}
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return true;
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}
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} // namespace internal
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} // namespace webrtc
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