tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

FrameTransformer.cpp (2613B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
      6 
      7 #include "libwebrtcglue/FrameTransformer.h"
      8 
      9 #include <stdint.h>
     10 
     11 #include <memory>
     12 #include <utility>
     13 
     14 #include "api/frame_transformer_interface.h"
     15 #include "api/scoped_refptr.h"
     16 #include "libwebrtcglue/FrameTransformerProxy.h"
     17 #include "mozilla/Mutex.h"
     18 
     19 namespace mozilla {
     20 
     21 FrameTransformer::FrameTransformer(bool aVideo)
     22    : webrtc::FrameTransformerInterface(),
     23      mVideo(aVideo),
     24      mCallbacksMutex("FrameTransformer::mCallbacksMutex"),
     25      mProxyMutex("FrameTransformer::mProxyMutex") {}
     26 
     27 FrameTransformer::~FrameTransformer() {
     28  if (mProxy) {
     29    mProxy->SetLibwebrtcTransformer(nullptr);
     30  }
     31 }
     32 
     33 void FrameTransformer::Transform(
     34    std::unique_ptr<webrtc::TransformableFrameInterface> aFrame) {
     35  MutexAutoLock lock(mProxyMutex);
     36  if (mProxy) {
     37    mProxy->Transform(std::move(aFrame));
     38    return;
     39  }
     40 
     41  // No transformer, just passthrough
     42  OnTransformedFrame(std::move(aFrame));
     43 }
     44 
     45 void FrameTransformer::RegisterTransformedFrameCallback(
     46    webrtc::scoped_refptr<webrtc::TransformedFrameCallback> aCallback) {
     47  MutexAutoLock lock(mCallbacksMutex);
     48  mCallback = aCallback;
     49 }
     50 
     51 void FrameTransformer::UnregisterTransformedFrameCallback() {
     52  MutexAutoLock lock(mCallbacksMutex);
     53  mCallback = nullptr;
     54 }
     55 
     56 void FrameTransformer::RegisterTransformedFrameSinkCallback(
     57    webrtc::scoped_refptr<webrtc::TransformedFrameCallback> aCallback,
     58    uint32_t aSsrc) {
     59  MutexAutoLock lock(mCallbacksMutex);
     60  mCallbacksBySsrc[aSsrc] = aCallback;
     61 }
     62 
     63 void FrameTransformer::UnregisterTransformedFrameSinkCallback(uint32_t aSsrc) {
     64  MutexAutoLock lock(mCallbacksMutex);
     65  mCallbacksBySsrc.erase(aSsrc);
     66 }
     67 
     68 void FrameTransformer::OnTransformedFrame(
     69    std::unique_ptr<webrtc::TransformableFrameInterface> aFrame) {
     70  MutexAutoLock lock(mCallbacksMutex);
     71  if (mCallback) {
     72    mCallback->OnTransformedFrame(std::move(aFrame));
     73  } else if (auto it = mCallbacksBySsrc.find(aFrame->GetSsrc());
     74             it != mCallbacksBySsrc.end()) {
     75    it->second->OnTransformedFrame(std::move(aFrame));
     76  }
     77 }
     78 
     79 void FrameTransformer::SetProxy(FrameTransformerProxy* aProxy) {
     80  MutexAutoLock lock(mProxyMutex);
     81  if (mProxy) {
     82    mProxy->SetLibwebrtcTransformer(nullptr);
     83  }
     84  mProxy = aProxy;
     85  if (mProxy) {
     86    mProxy->SetLibwebrtcTransformer(this);
     87  }
     88 }
     89 
     90 }  // namespace mozilla