зеркало из https://github.com/mozilla/gecko-dev.git
82 строки
2.3 KiB
C++
82 строки
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/Preferences.h"
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#ifdef MOZ_AV1
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#include "AOMDecoder.h"
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#endif
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#include "MediaContainerType.h"
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#include "MediaDecoderStateMachine.h"
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#include "WebMDemuxer.h"
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#include "WebMDecoder.h"
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#include "VideoUtils.h"
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namespace mozilla {
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MediaDecoderStateMachine* WebMDecoder::CreateStateMachine()
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{
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MediaFormatReaderInit init;
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init.mVideoFrameContainer = GetVideoFrameContainer();
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init.mKnowsCompositor = GetCompositor();
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init.mCrashHelper = GetOwner()->CreateGMPCrashHelper();
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init.mFrameStats = mFrameStats;
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mReader = new MediaFormatReader(init, new WebMDemuxer(mResource));
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return new MediaDecoderStateMachine(this, mReader);
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}
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/* static */
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bool
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WebMDecoder::IsSupportedType(const MediaContainerType& aContainerType)
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{
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if (!Preferences::GetBool("media.webm.enabled")) {
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return false;
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}
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bool isVideo = aContainerType.Type() == MEDIAMIMETYPE("video/webm");
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if (aContainerType.Type() != MEDIAMIMETYPE("audio/webm") && !isVideo) {
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return false;
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}
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const MediaCodecs& codecs = aContainerType.ExtendedType().Codecs();
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if (codecs.IsEmpty()) {
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// WebM guarantees that the only codecs it contained are vp8, vp9, opus or vorbis.
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return true;
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}
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// Verify that all the codecs specified are ones that we expect that
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// we can play.
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for (const auto& codec : codecs.Range()) {
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if (codec.EqualsLiteral("opus") || codec.EqualsLiteral("vorbis")) {
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continue;
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}
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// Note: Only accept VP8/VP9 in a video container type, not in an audio
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// container type.
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if (isVideo &&
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(codec.EqualsLiteral("vp8") || codec.EqualsLiteral("vp8.0") ||
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codec.EqualsLiteral("vp9") || codec.EqualsLiteral("vp9.0"))) {
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continue;
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}
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#ifdef MOZ_AV1
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if (isVideo && AOMDecoder::IsSupportedCodec(codec)) {
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continue;
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}
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#endif
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// Some unsupported codec.
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return false;
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}
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return true;
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}
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void
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WebMDecoder::GetMozDebugReaderData(nsACString& aString)
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{
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if (mReader) {
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mReader->GetMozDebugReaderData(aString);
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}
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}
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} // namespace mozilla
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