From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 19:32:43 +0200
Subject: Adding upstream version 1:115.7.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../webrtc/libwebrtcglue/MediaConduitInterface.h   | 495 +++++++++++++++++++++
 1 file changed, 495 insertions(+)
 create mode 100644 dom/media/webrtc/libwebrtcglue/MediaConduitInterface.h

(limited to 'dom/media/webrtc/libwebrtcglue/MediaConduitInterface.h')

diff --git a/dom/media/webrtc/libwebrtcglue/MediaConduitInterface.h b/dom/media/webrtc/libwebrtcglue/MediaConduitInterface.h
new file mode 100644
index 0000000000..86e148dc5c
--- /dev/null
+++ b/dom/media/webrtc/libwebrtcglue/MediaConduitInterface.h
@@ -0,0 +1,495 @@
+/* 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 http://mozilla.org/MPL/2.0/. */
+
+#ifndef MEDIA_CONDUIT_ABSTRACTION_
+#define MEDIA_CONDUIT_ABSTRACTION_
+
+#include <vector>
+#include <functional>
+#include <map>
+
+#include "CodecConfig.h"
+#include "ImageContainer.h"
+#include "jsapi/RTCStatsReport.h"
+#include "MediaConduitErrors.h"
+#include "mozilla/media/MediaUtils.h"
+#include "mozilla/MozPromise.h"
+#include "WebrtcVideoCodecFactory.h"
+#include "nsTArray.h"
+#include "mozilla/dom/RTCRtpSourcesBinding.h"
+#include "PerformanceRecorder.h"
+#include "transport/mediapacket.h"
+#include "MediaConduitControl.h"
+
+// libwebrtc includes
+#include "api/audio/audio_frame.h"
+#include "api/call/transport.h"
+#include "api/rtp_headers.h"
+#include "api/rtp_parameters.h"
+#include "api/transport/rtp/rtp_source.h"
+#include "api/video/video_frame_buffer.h"
+#include "call/audio_receive_stream.h"
+#include "call/audio_send_stream.h"
+#include "call/call_basic_stats.h"
+#include "call/video_receive_stream.h"
+#include "call/video_send_stream.h"
+#include "rtc_base/copy_on_write_buffer.h"
+
+namespace webrtc {
+class RtpPacketReceived;
+class VideoFrame;
+}  // namespace webrtc
+
+namespace mozilla {
+namespace dom {
+struct RTCRtpSourceEntry;
+}
+
+namespace dom {
+struct RTCRtpSourceEntry;
+}
+
+enum class MediaSessionConduitLocalDirection : int { kSend, kRecv };
+
+class VideoSessionConduit;
+class AudioSessionConduit;
+class WebrtcCallWrapper;
+
+/**
+ * 1. Abstract renderer for video data
+ * 2. This class acts as abstract interface between the video-engine and
+ *    video-engine agnostic renderer implementation.
+ * 3. Concrete implementation of this interface is responsible for
+ *    processing and/or rendering the obtained raw video frame to appropriate
+ *    output , say, <video>
+ */
+class VideoRenderer {
+ protected:
+  virtual ~VideoRenderer() {}
+
+ public:
+  /**
+   * Callback Function reportng any change in the video-frame dimensions
+   * @param width:  current width of the video @ decoder
+   * @param height: current height of the video @ decoder
+   */
+  virtual void FrameSizeChange(unsigned int width, unsigned int height) = 0;
+
+  /**
+   * Callback Function reporting decoded frame for processing.
+   * @param buffer: reference to decoded video frame
+   * @param buffer_size: size of the decoded frame
+   * @param time_stamp: Decoder timestamp, typically 90KHz as per RTP
+   * @render_time: Wall-clock time at the decoder for synchronization
+   *                purposes in milliseconds
+   * NOTE: If decoded video frame is passed through buffer , it is the
+   * responsibility of the concrete implementations of this class to own copy
+   * of the frame if needed for time longer than scope of this callback.
+   * Such implementations should be quick in processing the frames and return
+   * immediately.
+   */
+  virtual void RenderVideoFrame(const webrtc::VideoFrameBuffer& buffer,
+                                uint32_t time_stamp, int64_t render_time) = 0;
+
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(VideoRenderer)
+};
+
+/**
+ * Generic Interface for representing Audio/Video Session
+ * MediaSession conduit is identified by 2 main components
+ * 1. Attached Transport Interface (through events) for inbound and outbound RTP
+ *    transport
+ * 2. Attached Renderer Interface for rendering media data off the network
+ * This class hides specifics of Media-Engine implementation from the consumers
+ * of this interface.
+ * Also provides codec configuration API for the media sent and recevied
+ */
+class MediaSessionConduit {
+ protected:
+  virtual ~MediaSessionConduit() {}
+
+ public:
+  enum Type { AUDIO, VIDEO };
+  enum class PacketType { RTP, RTCP };
+
+  static std::string LocalDirectionToString(
+      const MediaSessionConduitLocalDirection aDirection) {
+    return aDirection == MediaSessionConduitLocalDirection::kSend ? "send"
+                                                                  : "receive";
+  }
+
+  virtual Type type() const = 0;
+
+  // Call thread only
+  virtual Maybe<int> ActiveSendPayloadType() const = 0;
+  virtual Maybe<int> ActiveRecvPayloadType() const = 0;
+
+  // Whether transport is currently sending and receiving packets
+  virtual void SetTransportActive(bool aActive) = 0;
+
+  // Sending packets
+  virtual MediaEventSourceExc<MediaPacket>& SenderRtpSendEvent() = 0;
+  virtual MediaEventSourceExc<MediaPacket>& SenderRtcpSendEvent() = 0;
+  virtual MediaEventSourceExc<MediaPacket>& ReceiverRtcpSendEvent() = 0;
+
+  // Receiving packets...
+  // from an rtp-receiving pipeline
+  virtual void ConnectReceiverRtpEvent(
+      MediaEventSourceExc<webrtc::RtpPacketReceived, webrtc::RTPHeader>&
+          aEvent) = 0;
+  // from an rtp-receiving pipeline
+  virtual void ConnectReceiverRtcpEvent(
+      MediaEventSourceExc<MediaPacket>& aEvent) = 0;
+  // from an rtp-transmitting pipeline
+  virtual void ConnectSenderRtcpEvent(
+      MediaEventSourceExc<MediaPacket>& aEvent) = 0;
+
+  // Sts thread only.
+  virtual Maybe<uint16_t> RtpSendBaseSeqFor(uint32_t aSsrc) const = 0;
+
+  // Any thread.
+  virtual const dom::RTCStatsTimestampMaker& GetTimestampMaker() const = 0;
+
+  virtual Ssrcs GetLocalSSRCs() const = 0;
+
+  virtual Maybe<Ssrc> GetRemoteSSRC() const = 0;
+  virtual void UnsetRemoteSSRC(Ssrc aSsrc) = 0;
+
+  virtual void DisableSsrcChanges() = 0;
+
+  virtual bool HasCodecPluginID(uint64_t aPluginID) const = 0;
+
+  // Stuff for driving mute/unmute events
+  virtual MediaEventSource<void>& RtcpByeEvent() = 0;
+  virtual MediaEventSource<void>& RtcpTimeoutEvent() = 0;
+  virtual MediaEventSource<void>& RtpPacketEvent() = 0;
+
+  virtual bool SendRtp(const uint8_t* aData, size_t aLength,
+                       const webrtc::PacketOptions& aOptions) = 0;
+  virtual bool SendSenderRtcp(const uint8_t* aData, size_t aLength) = 0;
+  virtual bool SendReceiverRtcp(const uint8_t* aData, size_t aLength) = 0;
+
+  virtual void DeliverPacket(rtc::CopyOnWriteBuffer packet,
+                             PacketType type) = 0;
+
+  virtual RefPtr<GenericPromise> Shutdown() = 0;
+
+  virtual Maybe<RefPtr<AudioSessionConduit>> AsAudioSessionConduit() = 0;
+  virtual Maybe<RefPtr<VideoSessionConduit>> AsVideoSessionConduit() = 0;
+
+  virtual Maybe<webrtc::CallBasicStats> GetCallStats() const = 0;
+
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(MediaSessionConduit)
+
+  void GetRtpSources(nsTArray<dom::RTCRtpSourceEntry>& outSources) const;
+
+  virtual void SetJitterBufferTarget(DOMHighResTimeStamp aTargetMs) = 0;
+
+  // test-only: inserts fake CSRCs and audio level data.
+  // NB: fake data is only valid during the current main thread task.
+  void InsertAudioLevelForContributingSource(const uint32_t aCsrcSource,
+                                             const int64_t aTimestamp,
+                                             const uint32_t aRtpTimestamp,
+                                             const bool aHasAudioLevel,
+                                             const uint8_t aAudioLevel);
+
+ protected:
+  virtual std::vector<webrtc::RtpSource> GetUpstreamRtpSources() const = 0;
+
+ private:
+  void UpdateRtpSources(const std::vector<webrtc::RtpSource>& aSources) const;
+
+  // Marks the cache as having been updated in the current task, and keeps it
+  // stable until the current task is finished.
+  void OnSourcesUpdated() const;
+
+  // Accessed only on main thread. This exists for a couple of reasons:
+  // 1. The webrtc spec says that source stats are updated using a queued task;
+  //    libwebrtc's internal representation of these stats is updated without
+  //    any task queueing, which means we need a mainthread-only cache.
+  // 2. libwebrtc uses its own clock that is not consistent with the one we
+  // need to use for stats (the so-called JS timestamps), which means we need
+  // to adjust the timestamps.  Since timestamp adjustment is inexact and will
+  // not necessarily yield exactly the same result if performed again later, we
+  // need to avoid performing it more than once for each entry, which means we
+  // need to remember both the JS timestamp (in dom::RTCRtpSourceEntry) and the
+  // libwebrtc timestamp (in SourceKey::mLibwebrtcTimestampMs).
+  class SourceKey {
+   public:
+    explicit SourceKey(const webrtc::RtpSource& aSource)
+        : SourceKey(aSource.timestamp_ms(), aSource.source_id()) {}
+
+    SourceKey(uint32_t aTimestamp, uint32_t aSrc)
+        : mLibwebrtcTimestampMs(aTimestamp), mSrc(aSrc) {}
+
+    // TODO: Once we support = default for this in our toolchain, do so
+    auto operator>(const SourceKey& aRhs) const {
+      if (mLibwebrtcTimestampMs == aRhs.mLibwebrtcTimestampMs) {
+        return mSrc > aRhs.mSrc;
+      }
+      return mLibwebrtcTimestampMs > aRhs.mLibwebrtcTimestampMs;
+    }
+
+   private:
+    uint32_t mLibwebrtcTimestampMs;
+    uint32_t mSrc;
+  };
+  mutable std::map<SourceKey, dom::RTCRtpSourceEntry, std::greater<SourceKey>>
+      mSourcesCache;
+  // Accessed only on main thread. A flag saying whether mSourcesCache needs
+  // updating. Ensures that get*Sources() appear stable from javascript
+  // throughout a main thread task, even though we don't follow the spec to the
+  // letter (dispatch a task to update the sources).
+  mutable bool mSourcesUpdateNeeded = true;
+};
+
+class WebrtcSendTransport : public webrtc::Transport {
+  // WeakRef to the owning conduit
+  MediaSessionConduit* mConduit;
+
+ public:
+  explicit WebrtcSendTransport(MediaSessionConduit* aConduit)
+      : mConduit(aConduit) {}
+  bool SendRtp(const uint8_t* aPacket, size_t aLength,
+               const webrtc::PacketOptions& aOptions) override {
+    return mConduit->SendRtp(aPacket, aLength, aOptions);
+  }
+  bool SendRtcp(const uint8_t* aPacket, size_t aLength) override {
+    return mConduit->SendSenderRtcp(aPacket, aLength);
+  }
+};
+
+class WebrtcReceiveTransport : public webrtc::Transport {
+  // WeakRef to the owning conduit
+  MediaSessionConduit* mConduit;
+
+ public:
+  explicit WebrtcReceiveTransport(MediaSessionConduit* aConduit)
+      : mConduit(aConduit) {}
+  bool SendRtp(const uint8_t* aPacket, size_t aLength,
+               const webrtc::PacketOptions& aOptions) override {
+    MOZ_CRASH("Unexpected RTP packet");
+  }
+  bool SendRtcp(const uint8_t* aPacket, size_t aLength) override {
+    return mConduit->SendReceiverRtcp(aPacket, aLength);
+  }
+};
+
+// Abstract base classes for external encoder/decoder.
+
+// Interface to help signal PluginIDs
+class CodecPluginID {
+ public:
+  virtual MediaEventSource<uint64_t>* InitPluginEvent() { return nullptr; }
+  virtual MediaEventSource<uint64_t>* ReleasePluginEvent() { return nullptr; }
+  virtual ~CodecPluginID() {}
+};
+
+class VideoEncoder : public CodecPluginID {
+ public:
+  virtual ~VideoEncoder() {}
+};
+
+class VideoDecoder : public CodecPluginID {
+ public:
+  virtual ~VideoDecoder() {}
+};
+
+/**
+ * MediaSessionConduit for video
+ * Refer to the comments on MediaSessionConduit above for overall
+ * information
+ */
+class VideoSessionConduit : public MediaSessionConduit {
+ public:
+  struct Options {
+    bool mVideoLatencyTestEnable = false;
+    // All in bps.
+    int mMinBitrate = 0;
+    int mStartBitrate = 0;
+    int mPrefMaxBitrate = 0;
+    int mMinBitrateEstimate = 0;
+    bool mDenoising = false;
+    bool mLockScaling = false;
+    uint8_t mSpatialLayers = 1;
+    uint8_t mTemporalLayers = 1;
+  };
+
+  /**
+   * Factory function to create and initialize a Video Conduit Session
+   * @param  webrtc::Call instance shared by paired audio and video
+   *         media conduits
+   * @param  aOptions are a number of options, typically from prefs, used to
+   *         configure the created VideoConduit.
+   * @param  aPCHandle is a string representing the RTCPeerConnection that is
+   *         creating this VideoConduit. This is used when reporting GMP plugin
+   *         crashes.
+   * @result Concrete VideoSessionConduitObject or nullptr in the case
+   *         of failure
+   */
+  static RefPtr<VideoSessionConduit> Create(
+      RefPtr<WebrtcCallWrapper> aCall,
+      nsCOMPtr<nsISerialEventTarget> aStsThread, Options aOptions,
+      std::string aPCHandle, const TrackingId& aRecvTrackingId);
+
+  enum FrameRequestType {
+    FrameRequestNone,
+    FrameRequestFir,
+    FrameRequestPli,
+    FrameRequestUnknown
+  };
+
+  VideoSessionConduit()
+      : mFrameRequestMethod(FrameRequestNone),
+        mUsingNackBasic(false),
+        mUsingTmmbr(false),
+        mUsingFEC(false) {}
+
+  virtual ~VideoSessionConduit() {}
+
+  Type type() const override { return VIDEO; }
+
+  Maybe<RefPtr<AudioSessionConduit>> AsAudioSessionConduit() override {
+    return Nothing();
+  }
+
+  Maybe<RefPtr<VideoSessionConduit>> AsVideoSessionConduit() override {
+    return Some(RefPtr<VideoSessionConduit>(this));
+  }
+
+  /**
+   * Hooks up mControl Mirrors with aControl Canonicals, and sets up
+   * mWatchManager to react on Mirror changes.
+   */
+  virtual void InitControl(VideoConduitControlInterface* aControl) = 0;
+
+  /**
+   * Function to attach Renderer end-point of the Media-Video conduit.
+   * @param aRenderer : Reference to the concrete Video renderer implementation
+   * Note: Multiple invocations of this API shall remove an existing renderer
+   * and attaches the new to the Conduit.
+   */
+  virtual MediaConduitErrorCode AttachRenderer(
+      RefPtr<mozilla::VideoRenderer> aRenderer) = 0;
+  virtual void DetachRenderer() = 0;
+
+  /**
+   * Function to deliver a capture video frame for encoding and transport.
+   * If the frame's timestamp is 0, it will be automatcally generated.
+   *
+   * NOTE: ConfigureSendMediaCodec() must be called before this function can
+   *       be invoked. This ensures the inserted video-frames can be
+   *       transmitted by the conduit.
+   */
+  virtual MediaConduitErrorCode SendVideoFrame(webrtc::VideoFrame aFrame) = 0;
+
+  /**
+   * These methods allow unit tests to double-check that the
+   * rtcp-fb settings are as expected.
+   */
+  FrameRequestType FrameRequestMethod() const { return mFrameRequestMethod; }
+
+  bool UsingNackBasic() const { return mUsingNackBasic; }
+
+  bool UsingTmmbr() const { return mUsingTmmbr; }
+
+  bool UsingFEC() const { return mUsingFEC; }
+
+  virtual Maybe<webrtc::VideoReceiveStreamInterface::Stats> GetReceiverStats()
+      const = 0;
+  virtual Maybe<webrtc::VideoSendStream::Stats> GetSenderStats() const = 0;
+
+  virtual void CollectTelemetryData() = 0;
+
+  virtual bool AddFrameHistory(
+      dom::Sequence<dom::RTCVideoFrameHistoryInternal>* outHistories) const = 0;
+
+  virtual Maybe<Ssrc> GetAssociatedLocalRtxSSRC(Ssrc aSsrc) const = 0;
+
+ protected:
+  /* RTCP feedback settings, for unit testing purposes */
+  FrameRequestType mFrameRequestMethod;
+  bool mUsingNackBasic;
+  bool mUsingTmmbr;
+  bool mUsingFEC;
+};
+
+/**
+ * MediaSessionConduit for audio
+ * Refer to the comments on MediaSessionConduit above for overall
+ * information
+ */
+class AudioSessionConduit : public MediaSessionConduit {
+ public:
+  /**
+   * Factory function to create and initialize an Audio Conduit Session
+   * @param  webrtc::Call instance shared by paired audio and video
+   *         media conduits
+   * @result Concrete AudioSessionConduitObject or nullptr in the case
+   *         of failure
+   */
+  static RefPtr<AudioSessionConduit> Create(
+      RefPtr<WebrtcCallWrapper> aCall,
+      nsCOMPtr<nsISerialEventTarget> aStsThread);
+
+  virtual ~AudioSessionConduit() {}
+
+  Type type() const override { return AUDIO; }
+
+  Maybe<RefPtr<AudioSessionConduit>> AsAudioSessionConduit() override {
+    return Some(this);
+  }
+
+  Maybe<RefPtr<VideoSessionConduit>> AsVideoSessionConduit() override {
+    return Nothing();
+  }
+
+  /**
+   * Hooks up mControl Mirrors with aControl Canonicals, and sets up
+   * mWatchManager to react on Mirror changes.
+   */
+  virtual void InitControl(AudioConduitControlInterface* aControl) = 0;
+
+  /**
+   * Function to deliver externally captured audio sample for encoding and
+   * transport
+   * @param frame [in]: AudioFrame in upstream's format for forwarding to the
+   *                    send stream. Ownership is passed along.
+   * NOTE: ConfigureSendMediaCodec() SHOULD be called before this function can
+   * be invoked. This ensures the inserted audio-samples can be transmitted by
+   * the conduit.
+   */
+  virtual MediaConduitErrorCode SendAudioFrame(
+      std::unique_ptr<webrtc::AudioFrame> frame) = 0;
+
+  /**
+   * Function to grab a decoded audio-sample from the media engine for
+   * rendering / playout of length 10 milliseconds.
+   *
+   * @param samplingFreqHz [in]: Frequency of the sampling for playback in
+   *                             Hertz (16000, 32000,..)
+   * @param frame [in/out]: Pointer to an AudioFrame to which audio data will be
+   *                        copied
+   * NOTE: This function should be invoked every 10 milliseconds for the best
+   *       performance
+   * NOTE: ConfigureRecvMediaCodec() SHOULD be called before this function can
+   *       be invoked
+   * This ensures the decoded samples are ready for reading and playout is
+   * enabled.
+   */
+  virtual MediaConduitErrorCode GetAudioFrame(int32_t samplingFreqHz,
+                                              webrtc::AudioFrame* frame) = 0;
+
+  /**
+   * Checks if given sampling frequency is supported
+   * @param freq: Sampling rate (in Hz) to check
+   */
+  virtual bool IsSamplingFreqSupported(int freq) const = 0;
+
+  virtual Maybe<webrtc::AudioReceiveStreamInterface::Stats> GetReceiverStats()
+      const = 0;
+  virtual Maybe<webrtc::AudioSendStream::Stats> GetSenderStats() const = 0;
+};
+}  // namespace mozilla
+#endif
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