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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
/* 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/. */

#include "MediaStreamListener.h"

#include "AudioSegment.h"
#include "VideoSegment.h"
#include "StreamTracks.h"

namespace mozilla {

#ifdef LOG
#undef LOG
#endif

#define LOG(type, msg) MOZ_LOG(gMediaStreamGraphLog, type, msg)

void
DirectMediaStreamTrackListener::MirrorAndDisableSegment(AudioSegment& aFrom,
                                                        AudioSegment& aTo)
{
  aTo.Clear();
  aTo.AppendNullData(aFrom.GetDuration());
}

void
DirectMediaStreamTrackListener::MirrorAndDisableSegment(VideoSegment& aFrom,
                                                        VideoSegment& aTo,
                                                        DisabledTrackMode aMode)
{
  aTo.Clear();
  if (aMode == DisabledTrackMode::SILENCE_BLACK) {
    for (VideoSegment::ChunkIterator it(aFrom); !it.IsEnded(); it.Next()) {
      aTo.AppendFrame(do_AddRef(it->mFrame.GetImage()),
                      it->GetDuration(),
                      it->mFrame.GetIntrinsicSize(),
                      it->GetPrincipalHandle(),
                      true);
    }
  } else if (aMode == DisabledTrackMode::SILENCE_FREEZE) {
    aTo.AppendNullData(aFrom.GetDuration());
  }
}

void
DirectMediaStreamTrackListener::NotifyRealtimeTrackDataAndApplyTrackDisabling(MediaStreamGraph* aGraph,
                                                                             StreamTime aTrackOffset,
                                                                             MediaSegment& aMedia)
{
  if (mDisabledFreezeCount == 0 && mDisabledBlackCount == 0) {
    NotifyRealtimeTrackData(aGraph, aTrackOffset, aMedia);
    return;
  }

  DisabledTrackMode mode = mDisabledBlackCount > 0
                           ? DisabledTrackMode::SILENCE_BLACK
                           : DisabledTrackMode::SILENCE_FREEZE;
  if (!mMedia) {
    mMedia = aMedia.CreateEmptyClone();
  }
  if (aMedia.GetType() == MediaSegment::AUDIO) {
    MirrorAndDisableSegment(static_cast<AudioSegment&>(aMedia),
                            static_cast<AudioSegment&>(*mMedia));
  } else if (aMedia.GetType() == MediaSegment::VIDEO) {
    MirrorAndDisableSegment(static_cast<VideoSegment&>(aMedia),
                            static_cast<VideoSegment&>(*mMedia),
                            mode);
  } else {
    MOZ_CRASH("Unsupported media type");
  }
  NotifyRealtimeTrackData(aGraph, aTrackOffset, *mMedia);
}

void
DirectMediaStreamTrackListener::IncreaseDisabled(DisabledTrackMode aMode)
{
  if (aMode == DisabledTrackMode::SILENCE_FREEZE) {
    ++mDisabledFreezeCount;
  } else if (aMode == DisabledTrackMode::SILENCE_BLACK) {
    ++mDisabledBlackCount;
  } else {
    MOZ_ASSERT(false, "Unknown disabled mode");
  }

  LOG(LogLevel::Debug, ("DirectMediaStreamTrackListener %p increased disabled "
                        "mode %s. Current counts are: freeze=%d, black=%d",
                        this,
                        aMode == DisabledTrackMode::SILENCE_FREEZE ? "freeze" : "black",
                        int32_t(mDisabledFreezeCount),
                        int32_t(mDisabledBlackCount)));
}

void
DirectMediaStreamTrackListener::DecreaseDisabled(DisabledTrackMode aMode)
{
  if (aMode == DisabledTrackMode::SILENCE_FREEZE) {
    --mDisabledFreezeCount;
    MOZ_ASSERT(mDisabledFreezeCount >= 0, "Double decrease");
  } else if (aMode == DisabledTrackMode::SILENCE_BLACK) {
    --mDisabledBlackCount;
    MOZ_ASSERT(mDisabledBlackCount >= 0, "Double decrease");
  } else {
    MOZ_ASSERT(false, "Unknown disabled mode");
  }

  LOG(LogLevel::Debug, ("DirectMediaStreamTrackListener %p decreased disabled "
                        "mode %s. Current counts are: freeze=%d, black=%d",
                        this,
                        aMode == DisabledTrackMode::SILENCE_FREEZE ? "freeze" : "black",
                        int32_t(mDisabledFreezeCount),
                        int32_t(mDisabledBlackCount)));
}

} // namespace mozilla