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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /dom/media/webm/WebMDecoder.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'dom/media/webm/WebMDecoder.cpp')
-rw-r--r--dom/media/webm/WebMDecoder.cpp99
1 files changed, 99 insertions, 0 deletions
diff --git a/dom/media/webm/WebMDecoder.cpp b/dom/media/webm/WebMDecoder.cpp
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+++ b/dom/media/webm/WebMDecoder.cpp
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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 "mozilla/Preferences.h"
+#include "MediaDecoderStateMachine.h"
+#include "WebMDemuxer.h"
+#include "WebMDecoder.h"
+#include "VideoUtils.h"
+#include "nsContentTypeParser.h"
+
+namespace mozilla {
+
+MediaDecoderStateMachine* WebMDecoder::CreateStateMachine()
+{
+ mReader =
+ new MediaFormatReader(this, new WebMDemuxer(GetResource()), GetVideoFrameContainer());
+ return new MediaDecoderStateMachine(this, mReader);
+}
+
+/* static */
+bool
+WebMDecoder::IsEnabled()
+{
+ return Preferences::GetBool("media.webm.enabled");
+}
+
+/* static */
+bool
+WebMDecoder::CanHandleMediaType(const nsACString& aMIMETypeExcludingCodecs,
+ const nsAString& aCodecs)
+{
+ if (!IsEnabled()) {
+ return false;
+ }
+
+ const bool isWebMAudio = aMIMETypeExcludingCodecs.EqualsASCII("audio/webm");
+ const bool isWebMVideo = aMIMETypeExcludingCodecs.EqualsASCII("video/webm");
+ if (!isWebMAudio && !isWebMVideo) {
+ return false;
+ }
+
+ nsTArray<nsCString> codecMimes;
+ if (aCodecs.IsEmpty()) {
+ // WebM guarantees that the only codecs it contained are vp8, vp9, opus or vorbis.
+ return true;
+ }
+ // Verify that all the codecs specified are ones that we expect that
+ // we can play.
+ nsTArray<nsString> codecs;
+ if (!ParseCodecsString(aCodecs, codecs)) {
+ return false;
+ }
+ for (const nsString& codec : codecs) {
+ if (codec.EqualsLiteral("opus") || codec.EqualsLiteral("vorbis")) {
+ continue;
+ }
+ // Note: Only accept VP8/VP9 in a video content type, not in an audio
+ // content type.
+ if (isWebMVideo &&
+ (codec.EqualsLiteral("vp8") || codec.EqualsLiteral("vp8.0") ||
+ codec.EqualsLiteral("vp9") || codec.EqualsLiteral("vp9.0"))) {
+
+ continue;
+ }
+ // Some unsupported codec.
+ return false;
+ }
+ return true;
+}
+
+/* static */ bool
+WebMDecoder::CanHandleMediaType(const nsAString& aContentType)
+{
+ nsContentTypeParser parser(aContentType);
+ nsAutoString mimeType;
+ nsresult rv = parser.GetType(mimeType);
+ if (NS_FAILED(rv)) {
+ return false;
+ }
+ nsString codecs;
+ parser.GetParameter("codecs", codecs);
+
+ return CanHandleMediaType(NS_ConvertUTF16toUTF8(mimeType),
+ codecs);
+}
+
+void
+WebMDecoder::GetMozDebugReaderData(nsAString& aString)
+{
+ if (mReader) {
+ mReader->GetMozDebugReaderData(aString);
+ }
+}
+
+} // namespace mozilla
+