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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
#ifndef MOZILLA_DOM_MEDIA_WEBRTC_LIBWEBRTCGLUE_FRAMETRANSFORMER_H_
#define MOZILLA_DOM_MEDIA_WEBRTC_LIBWEBRTCGLUE_FRAMETRANSFORMER_H_
#include "api/frame_transformer_interface.h"
#include "libwebrtcglue/FrameTransformerProxy.h"
#include "nsISupportsImpl.h"
#include "mozilla/Mutex.h"
#include "jsapi/RTCRtpScriptTransformer.h"
namespace mozilla {
// There is one of these per RTCRtpSender and RTCRtpReceiver, for its entire
// lifetime. SetProxy is used to activate/deactivate it. In the inactive state
// (the default), this is just a synchronous passthrough.
class FrameTransformer : public webrtc::FrameTransformerInterface {
public:
explicit FrameTransformer(bool aVideo);
virtual ~FrameTransformer();
// This is set when RTCRtpSender/Receiver.transform is set, and unset when
// RTCRtpSender/Receiver.transform is unset.
void SetProxy(FrameTransformerProxy* aProxy);
// If no proxy is set (ie; RTCRtpSender/Receiver.transform is not set), this
// synchronously calls OnTransformedFrame with no modifcation. If a proxy is
// set, we send the frame to it, and eventually that frame should come back
// to OnTransformedFrame.
void Transform(
std::unique_ptr<webrtc::TransformableFrameInterface> aFrame) override;
void OnTransformedFrame(
std::unique_ptr<webrtc::TransformableFrameInterface> aFrame);
// When libwebrtc uses the same callback for all ssrcs
// (right now, this is used for audio, but we do not care in this class)
void RegisterTransformedFrameCallback(
rtc::scoped_refptr<webrtc::TransformedFrameCallback> aCallback) override;
void UnregisterTransformedFrameCallback() override;
// When libwebrtc uses a different callback for each ssrc
// (right now, this is used for video, but we do not care in this class)
void RegisterTransformedFrameSinkCallback(
rtc::scoped_refptr<webrtc::TransformedFrameCallback> aCallback,
uint32_t aSsrc) override;
void UnregisterTransformedFrameSinkCallback(uint32_t aSsrc) override;
bool IsVideo() const { return mVideo; }
private:
const bool mVideo;
Mutex mCallbacksMutex;
// Written on a libwebrtc thread, read on the worker thread.
rtc::scoped_refptr<webrtc::TransformedFrameCallback> mCallback
MOZ_GUARDED_BY(mCallbacksMutex);
std::map<uint32_t, rtc::scoped_refptr<webrtc::TransformedFrameCallback>>
mCallbacksBySsrc MOZ_GUARDED_BY(mCallbacksMutex);
Mutex mProxyMutex;
// Written on the call thread, read on a libwebrtc/gmp/mediadataencoder/call
// thread (which one depends on the media type and direction). Right now,
// these are:
// Send video: VideoStreamEncoder::encoder_queue_,
// WebrtcMediaDataEncoder::mTaskQueue, or GMP encoder thread.
// Recv video: Call::worker_thread_
// Send audio: ChannelSend::encoder_queue_
// Recv audio: ChannelReceive::worker_thread_
// This should have little to no lock contention
// This corresponds to the RTCRtpScriptTransform/RTCRtpScriptTransformer.
RefPtr<FrameTransformerProxy> mProxy MOZ_GUARDED_BY(mProxyMutex);
}; // FrameTransformer
} // namespace mozilla
#endif // MOZILLA_DOM_MEDIA_WEBRTC_LIBWEBRTCGLUE_FRAMETRANSFORMER_H_
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