1 files changed, 112 insertions, 0 deletions
diff --git a/dom/media/webm/WebMWriter.cpp b/dom/media/webm/WebMWriter.cpp
new file mode 100644
index 0000000000..96c4169091
--- /dev/null
+++ b/dom/media/webm/WebMWriter.cpp
@@ -0,0 +1,112 @@
+/* -*- 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 "WebMWriter.h"
+#include "EbmlComposer.h"
+#include "mozilla/ProfilerLabels.h"
+#include "OpusTrackEncoder.h"
+
+namespace mozilla {
+
+WebMWriter::WebMWriter()
+    : ContainerWriter(), mEbmlComposer(new EbmlComposer()) {}
+
+WebMWriter::~WebMWriter() {
+  // Out-of-line dtor so mEbmlComposer UniquePtr can delete a complete type.
+}
+
+nsresult WebMWriter::WriteEncodedTrack(
+    const nsTArray<RefPtr<EncodedFrame>>& aData, uint32_t aFlags) {
+  AUTO_PROFILER_LABEL("WebMWriter::WriteEncodedTrack", OTHER);
+  for (uint32_t i = 0; i < aData.Length(); i++) {
+    nsresult rv = mEbmlComposer->WriteSimpleBlock(aData.ElementAt(i).get());
+    NS_ENSURE_SUCCESS(rv, rv);
+  }
+  return NS_OK;
+}
+
+nsresult WebMWriter::GetContainerData(nsTArray<nsTArray<uint8_t>>* aOutputBufs,
+                                      uint32_t aFlags) {
+  AUTO_PROFILER_LABEL("WebMWriter::GetContainerData", OTHER);
+  mEbmlComposer->ExtractBuffer(aOutputBufs, aFlags);
+  if (aFlags & ContainerWriter::FLUSH_NEEDED) {
+    mIsWritingComplete = true;
+  }
+  return NS_OK;
+}
+
+nsresult WebMWriter::SetMetadata(
+    const nsTArray<RefPtr<TrackMetadataBase>>& aMetadata) {
+  AUTO_PROFILER_LABEL("WebMWriter::SetMetadata", OTHER);
+  MOZ_DIAGNOSTIC_ASSERT(!aMetadata.IsEmpty());
+
+  // Integrity checks
+  bool bad = false;
+  for (const RefPtr<TrackMetadataBase>& metadata : aMetadata) {
+    MOZ_ASSERT(metadata);
+
+    if (metadata->GetKind() == TrackMetadataBase::METADATA_VP8) {
+      VP8Metadata* meta = static_cast<VP8Metadata*>(metadata.get());
+      if (meta->mWidth == 0 || meta->mHeight == 0 || meta->mDisplayWidth == 0 ||
+          meta->mDisplayHeight == 0) {
+        bad = true;
+      }
+    }
+
+    if (metadata->GetKind() == TrackMetadataBase::METADATA_VORBIS) {
+      VorbisMetadata* meta = static_cast<VorbisMetadata*>(metadata.get());
+      if (meta->mSamplingFrequency == 0 || meta->mChannels == 0 ||
+          meta->mData.IsEmpty()) {
+        bad = true;
+      }
+    }
+
+    if (metadata->GetKind() == TrackMetadataBase::METADATA_OPUS) {
+      OpusMetadata* meta = static_cast<OpusMetadata*>(metadata.get());
+      if (meta->mSamplingFrequency == 0 || meta->mChannels == 0 ||
+          meta->mIdHeader.IsEmpty()) {
+        bad = true;
+      }
+    }
+  }
+  if (bad) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // Storing
+  DebugOnly<bool> hasAudio = false;
+  DebugOnly<bool> hasVideo = false;
+  for (const RefPtr<TrackMetadataBase>& metadata : aMetadata) {
+    MOZ_ASSERT(metadata);
+
+    if (metadata->GetKind() == TrackMetadataBase::METADATA_VP8) {
+      MOZ_ASSERT(!hasVideo);
+      VP8Metadata* meta = static_cast<VP8Metadata*>(metadata.get());
+      mEbmlComposer->SetVideoConfig(meta->mWidth, meta->mHeight,
+                                    meta->mDisplayWidth, meta->mDisplayHeight);
+      hasVideo = true;
+    }
+
+    if (metadata->GetKind() == TrackMetadataBase::METADATA_VORBIS) {
+      MOZ_ASSERT(!hasAudio);
+      VorbisMetadata* meta = static_cast<VorbisMetadata*>(metadata.get());
+      mEbmlComposer->SetAudioConfig(meta->mSamplingFrequency, meta->mChannels);
+      mEbmlComposer->SetAudioCodecPrivateData(meta->mData);
+      hasAudio = true;
+    }
+
+    if (metadata->GetKind() == TrackMetadataBase::METADATA_OPUS) {
+      MOZ_ASSERT(!hasAudio);
+      OpusMetadata* meta = static_cast<OpusMetadata*>(metadata.get());
+      mEbmlComposer->SetAudioConfig(meta->mSamplingFrequency, meta->mChannels);
+      mEbmlComposer->SetAudioCodecPrivateData(meta->mIdHeader);
+      hasAudio = true;
+    }
+  }
+  mEbmlComposer->GenerateHeader();
+  return NS_OK;
+}
+
+}  // namespace mozilla