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Unified Diff: webrtc/api/videocapturertracksource.cc

Issue 2514883002: Create //webrtc/api:libjingle_peerconnection_api + refactorings. (Closed)
Patch Set: Rebase Created 3 years, 11 months ago
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Index: webrtc/api/videocapturertracksource.cc
diff --git a/webrtc/api/videocapturertracksource.cc b/webrtc/api/videocapturertracksource.cc
deleted file mode 100644
index 0d6d46d60904370093df30bfa2eb691d62047422..0000000000000000000000000000000000000000
--- a/webrtc/api/videocapturertracksource.cc
+++ /dev/null
@@ -1,397 +0,0 @@
-/*
- * Copyright 2012 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 "webrtc/api/videocapturertracksource.h"
-
-#include <cstdlib>
-#include <string>
-#include <vector>
-
-#include "webrtc/api/mediaconstraintsinterface.h"
-#include "webrtc/base/arraysize.h"
-#include "webrtc/base/checks.h"
-
-using cricket::CaptureState;
-using webrtc::MediaConstraintsInterface;
-using webrtc::MediaSourceInterface;
-
-namespace {
-
-const double kRoundingTruncation = 0.0005;
-
-// Default resolution. If no constraint is specified, this is the resolution we
-// will use.
-static const cricket::VideoFormatPod kDefaultFormat = {
- 640, 480, FPS_TO_INTERVAL(30), cricket::FOURCC_ANY};
-
-// List of formats used if the camera doesn't support capability enumeration.
-static const cricket::VideoFormatPod kVideoFormats[] = {
- {1920, 1080, FPS_TO_INTERVAL(30), cricket::FOURCC_ANY},
- {1280, 720, FPS_TO_INTERVAL(30), cricket::FOURCC_ANY},
- {960, 720, FPS_TO_INTERVAL(30), cricket::FOURCC_ANY},
- {640, 360, FPS_TO_INTERVAL(30), cricket::FOURCC_ANY},
- {640, 480, FPS_TO_INTERVAL(30), cricket::FOURCC_ANY},
- {320, 240, FPS_TO_INTERVAL(30), cricket::FOURCC_ANY},
- {320, 180, FPS_TO_INTERVAL(30), cricket::FOURCC_ANY}};
-
-MediaSourceInterface::SourceState GetReadyState(cricket::CaptureState state) {
- switch (state) {
- case cricket::CS_STARTING:
- return MediaSourceInterface::kInitializing;
- case cricket::CS_RUNNING:
- return MediaSourceInterface::kLive;
- case cricket::CS_FAILED:
- case cricket::CS_STOPPED:
- return MediaSourceInterface::kEnded;
- default:
- RTC_NOTREACHED() << "GetReadyState unknown state";
- }
- return MediaSourceInterface::kEnded;
-}
-
-void SetUpperLimit(int new_limit, int* original_limit) {
- if (*original_limit < 0 || new_limit < *original_limit)
- *original_limit = new_limit;
-}
-
-// Updates |format_upper_limit| from |constraint|.
-// If constraint.maxFoo is smaller than format_upper_limit.foo,
-// set format_upper_limit.foo to constraint.maxFoo.
-void SetUpperLimitFromConstraint(
- const MediaConstraintsInterface::Constraint& constraint,
- cricket::VideoFormat* format_upper_limit) {
- if (constraint.key == MediaConstraintsInterface::kMaxWidth) {
- int value = rtc::FromString<int>(constraint.value);
- SetUpperLimit(value, &(format_upper_limit->width));
- } else if (constraint.key == MediaConstraintsInterface::kMaxHeight) {
- int value = rtc::FromString<int>(constraint.value);
- SetUpperLimit(value, &(format_upper_limit->height));
- }
-}
-
-// Fills |format_out| with the max width and height allowed by |constraints|.
-void FromConstraintsForScreencast(
- const MediaConstraintsInterface::Constraints& constraints,
- cricket::VideoFormat* format_out) {
- typedef MediaConstraintsInterface::Constraints::const_iterator
- ConstraintsIterator;
-
- cricket::VideoFormat upper_limit(-1, -1, 0, 0);
- for (ConstraintsIterator constraints_it = constraints.begin();
- constraints_it != constraints.end(); ++constraints_it)
- SetUpperLimitFromConstraint(*constraints_it, &upper_limit);
-
- if (upper_limit.width >= 0)
- format_out->width = upper_limit.width;
- if (upper_limit.height >= 0)
- format_out->height = upper_limit.height;
-}
-
-// Returns true if |constraint| is fulfilled. |format_out| can differ from
-// |format_in| if the format is changed by the constraint. Ie - the frame rate
-// can be changed by setting maxFrameRate.
-bool NewFormatWithConstraints(
- const MediaConstraintsInterface::Constraint& constraint,
- const cricket::VideoFormat& format_in,
- bool mandatory,
- cricket::VideoFormat* format_out) {
- RTC_DCHECK(format_out != NULL);
- *format_out = format_in;
-
- if (constraint.key == MediaConstraintsInterface::kMinWidth) {
- int value = rtc::FromString<int>(constraint.value);
- return (value <= format_in.width);
- } else if (constraint.key == MediaConstraintsInterface::kMaxWidth) {
- int value = rtc::FromString<int>(constraint.value);
- return (value >= format_in.width);
- } else if (constraint.key == MediaConstraintsInterface::kMinHeight) {
- int value = rtc::FromString<int>(constraint.value);
- return (value <= format_in.height);
- } else if (constraint.key == MediaConstraintsInterface::kMaxHeight) {
- int value = rtc::FromString<int>(constraint.value);
- return (value >= format_in.height);
- } else if (constraint.key == MediaConstraintsInterface::kMinFrameRate) {
- int value = rtc::FromString<int>(constraint.value);
- return (value <= cricket::VideoFormat::IntervalToFps(format_in.interval));
- } else if (constraint.key == MediaConstraintsInterface::kMaxFrameRate) {
- int value = rtc::FromString<int>(constraint.value);
- if (value == 0) {
- if (mandatory) {
- // TODO(ronghuawu): Convert the constraint value to float when sub-1fps
- // is supported by the capturer.
- return false;
- } else {
- value = 1;
- }
- }
- if (value <= cricket::VideoFormat::IntervalToFps(format_in.interval))
- format_out->interval = cricket::VideoFormat::FpsToInterval(value);
- return true;
- } else if (constraint.key == MediaConstraintsInterface::kMinAspectRatio) {
- double value = rtc::FromString<double>(constraint.value);
- // The aspect ratio in |constraint.value| has been converted to a string and
- // back to a double, so it may have a rounding error.
- // E.g if the value 1/3 is converted to a string, the string will not have
- // infinite length.
- // We add a margin of 0.0005 which is high enough to detect the same aspect
- // ratio but small enough to avoid matching wrong aspect ratios.
- double ratio = static_cast<double>(format_in.width) / format_in.height;
- return (value <= ratio + kRoundingTruncation);
- } else if (constraint.key == MediaConstraintsInterface::kMaxAspectRatio) {
- double value = rtc::FromString<double>(constraint.value);
- double ratio = static_cast<double>(format_in.width) / format_in.height;
- // Subtract 0.0005 to avoid rounding problems. Same as above.
- const double kRoundingTruncation = 0.0005;
- return (value >= ratio - kRoundingTruncation);
- } else if (constraint.key == MediaConstraintsInterface::kNoiseReduction) {
- // These are actually options, not constraints, so they can be satisfied
- // regardless of the format.
- return true;
- }
- LOG(LS_WARNING) << "Found unknown MediaStream constraint. Name:"
- << constraint.key << " Value:" << constraint.value;
- return false;
-}
-
-// Removes cricket::VideoFormats from |formats| that don't meet |constraint|.
-void FilterFormatsByConstraint(
- const MediaConstraintsInterface::Constraint& constraint,
- bool mandatory,
- std::vector<cricket::VideoFormat>* formats) {
- std::vector<cricket::VideoFormat>::iterator format_it = formats->begin();
- while (format_it != formats->end()) {
- // Modify the format_it to fulfill the constraint if possible.
- // Delete it otherwise.
- if (!NewFormatWithConstraints(constraint, (*format_it), mandatory,
- &(*format_it))) {
- format_it = formats->erase(format_it);
- } else {
- ++format_it;
- }
- }
-}
-
-// Returns a vector of cricket::VideoFormat that best match |constraints|.
-std::vector<cricket::VideoFormat> FilterFormats(
- const MediaConstraintsInterface::Constraints& mandatory,
- const MediaConstraintsInterface::Constraints& optional,
- const std::vector<cricket::VideoFormat>& supported_formats) {
- typedef MediaConstraintsInterface::Constraints::const_iterator
- ConstraintsIterator;
- std::vector<cricket::VideoFormat> candidates = supported_formats;
-
- for (ConstraintsIterator constraints_it = mandatory.begin();
- constraints_it != mandatory.end(); ++constraints_it)
- FilterFormatsByConstraint(*constraints_it, true, &candidates);
-
- if (candidates.size() == 0)
- return candidates;
-
- // Ok - all mandatory checked and we still have a candidate.
- // Let's try filtering using the optional constraints.
- for (ConstraintsIterator constraints_it = optional.begin();
- constraints_it != optional.end(); ++constraints_it) {
- std::vector<cricket::VideoFormat> current_candidates = candidates;
- FilterFormatsByConstraint(*constraints_it, false, &current_candidates);
- if (current_candidates.size() > 0) {
- candidates = current_candidates;
- }
- }
-
- // We have done as good as we can to filter the supported resolutions.
- return candidates;
-}
-
-// Find the format that best matches the default video size.
-// Constraints are optional and since the performance of a video call
-// might be bad due to bitrate limitations, CPU, and camera performance,
-// it is better to select a resolution that is as close as possible to our
-// default and still meets the contraints.
-const cricket::VideoFormat& GetBestCaptureFormat(
- const std::vector<cricket::VideoFormat>& formats) {
- RTC_DCHECK(formats.size() > 0);
-
- int default_area = kDefaultFormat.width * kDefaultFormat.height;
-
- std::vector<cricket::VideoFormat>::const_iterator it = formats.begin();
- std::vector<cricket::VideoFormat>::const_iterator best_it = formats.begin();
- int best_diff_area = std::abs(default_area - it->width * it->height);
- int64_t best_diff_interval = kDefaultFormat.interval;
- for (; it != formats.end(); ++it) {
- int diff_area = std::abs(default_area - it->width * it->height);
- int64_t diff_interval = std::abs(kDefaultFormat.interval - it->interval);
- if (diff_area < best_diff_area ||
- (diff_area == best_diff_area && diff_interval < best_diff_interval)) {
- best_diff_area = diff_area;
- best_diff_interval = diff_interval;
- best_it = it;
- }
- }
- return *best_it;
-}
-
-// Set |option| to the highest-priority value of |key| in the constraints.
-// Return false if the key is mandatory, and the value is invalid.
-bool ExtractOption(const MediaConstraintsInterface* all_constraints,
- const std::string& key,
- rtc::Optional<bool>* option) {
- size_t mandatory = 0;
- bool value;
- if (FindConstraint(all_constraints, key, &value, &mandatory)) {
- *option = rtc::Optional<bool>(value);
- return true;
- }
-
- return mandatory == 0;
-}
-
-} // anonymous namespace
-
-namespace webrtc {
-
-rtc::scoped_refptr<VideoTrackSourceInterface> VideoCapturerTrackSource::Create(
- rtc::Thread* worker_thread,
- cricket::VideoCapturer* capturer,
- const webrtc::MediaConstraintsInterface* constraints,
- bool remote) {
- RTC_DCHECK(worker_thread != NULL);
- RTC_DCHECK(capturer != NULL);
- rtc::scoped_refptr<VideoCapturerTrackSource> source(
- new rtc::RefCountedObject<VideoCapturerTrackSource>(worker_thread,
- capturer, remote));
- source->Initialize(constraints);
- return source;
-}
-
-rtc::scoped_refptr<VideoTrackSourceInterface> VideoCapturerTrackSource::Create(
- rtc::Thread* worker_thread,
- cricket::VideoCapturer* capturer,
- bool remote) {
- RTC_DCHECK(worker_thread != NULL);
- RTC_DCHECK(capturer != NULL);
- rtc::scoped_refptr<VideoCapturerTrackSource> source(
- new rtc::RefCountedObject<VideoCapturerTrackSource>(worker_thread,
- capturer, remote));
- source->Initialize(nullptr);
- return source;
-}
-
-VideoCapturerTrackSource::VideoCapturerTrackSource(
- rtc::Thread* worker_thread,
- cricket::VideoCapturer* capturer,
- bool remote)
- : VideoTrackSource(capturer, remote),
- signaling_thread_(rtc::Thread::Current()),
- worker_thread_(worker_thread),
- video_capturer_(capturer),
- started_(false) {
- video_capturer_->SignalStateChange.connect(
- this, &VideoCapturerTrackSource::OnStateChange);
-}
-
-VideoCapturerTrackSource::~VideoCapturerTrackSource() {
- video_capturer_->SignalStateChange.disconnect(this);
- Stop();
-}
-
-void VideoCapturerTrackSource::Initialize(
- const webrtc::MediaConstraintsInterface* constraints) {
- std::vector<cricket::VideoFormat> formats =
- *video_capturer_->GetSupportedFormats();
- if (formats.empty()) {
- if (video_capturer_->IsScreencast()) {
- // The screen capturer can accept any resolution and we will derive the
- // format from the constraints if any.
- // Note that this only affects tab capturing, not desktop capturing,
- // since the desktop capturer does not respect the VideoFormat passed in.
- formats.push_back(cricket::VideoFormat(kDefaultFormat));
- } else {
- // The VideoCapturer implementation doesn't support capability
- // enumeration. We need to guess what the camera supports.
- for (uint32_t i = 0; i < arraysize(kVideoFormats); ++i) {
- formats.push_back(cricket::VideoFormat(kVideoFormats[i]));
- }
- }
- }
-
- if (constraints) {
- MediaConstraintsInterface::Constraints mandatory_constraints =
- constraints->GetMandatory();
- MediaConstraintsInterface::Constraints optional_constraints;
- optional_constraints = constraints->GetOptional();
-
- if (video_capturer_->IsScreencast()) {
- // Use the maxWidth and maxHeight allowed by constraints for screencast.
- FromConstraintsForScreencast(mandatory_constraints, &(formats[0]));
- }
-
- formats =
- FilterFormats(mandatory_constraints, optional_constraints, formats);
- }
-
- if (formats.size() == 0) {
- LOG(LS_WARNING) << "Failed to find a suitable video format.";
- SetState(kEnded);
- return;
- }
-
- if (!ExtractOption(constraints, MediaConstraintsInterface::kNoiseReduction,
- &needs_denoising_)) {
- LOG(LS_WARNING) << "Invalid mandatory value for"
- << MediaConstraintsInterface::kNoiseReduction;
- SetState(kEnded);
- return;
- }
-
- format_ = GetBestCaptureFormat(formats);
- // Start the camera with our best guess.
- if (!worker_thread_->Invoke<bool>(
- RTC_FROM_HERE, rtc::Bind(&cricket::VideoCapturer::StartCapturing,
- video_capturer_.get(), format_))) {
- SetState(kEnded);
- return;
- }
- started_ = true;
- // Initialize hasn't succeeded until a successful state change has occurred.
-}
-
-bool VideoCapturerTrackSource::GetStats(Stats* stats) {
- return video_capturer_->GetInputSize(&stats->input_width,
- &stats->input_height);
-}
-
-void VideoCapturerTrackSource::Stop() {
- if (!started_) {
- return;
- }
- started_ = false;
- worker_thread_->Invoke<void>(
- RTC_FROM_HERE,
- rtc::Bind(&cricket::VideoCapturer::Stop, video_capturer_.get()));
-}
-
-// OnStateChange listens to the cricket::VideoCapturer::SignalStateChange.
-void VideoCapturerTrackSource::OnStateChange(
- cricket::VideoCapturer* capturer,
- cricket::CaptureState capture_state) {
- if (rtc::Thread::Current() != signaling_thread_) {
- invoker_.AsyncInvoke<void>(
- RTC_FROM_HERE, signaling_thread_,
- rtc::Bind(&VideoCapturerTrackSource::OnStateChange, this, capturer,
- capture_state));
- return;
- }
-
- if (capturer == video_capturer_.get()) {
- SetState(GetReadyState(capture_state));
- }
-}
-
-} // namespace webrtc
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