mirror of
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80 lines
2.3 KiB
C++
80 lines
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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#include "MediaDecoderStateMachine.h"
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#include "MediaFormatReader.h"
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#include "WebMDemuxer.h"
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#include "WebMReader.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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bool useFormatDecoder =
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Preferences::GetBool("media.format-reader.webm", true);
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RefPtr<MediaDecoderReader> reader = useFormatDecoder ?
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static_cast<MediaDecoderReader*>(new MediaFormatReader(this, new WebMDemuxer(GetResource()), GetVideoFrameContainer())) :
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new WebMReader(this);
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return new MediaDecoderStateMachine(this, reader);
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}
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/* static */
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bool
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WebMDecoder::IsEnabled()
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{
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return Preferences::GetBool("media.webm.enabled");
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}
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/* static */
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bool
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WebMDecoder::CanHandleMediaType(const nsACString& aMIMETypeExcludingCodecs,
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const nsAString& aCodecs)
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{
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if (!IsEnabled()) {
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return false;
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}
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const bool isWebMAudio = aMIMETypeExcludingCodecs.EqualsASCII("audio/webm");
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const bool isWebMVideo = aMIMETypeExcludingCodecs.EqualsASCII("video/webm");
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if (!isWebMAudio && !isWebMVideo) {
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return false;
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}
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nsTArray<nsCString> codecMimes;
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if (aCodecs.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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nsTArray<nsString> codecs;
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if (!ParseCodecsString(aCodecs, codecs)) {
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return false;
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}
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for (const nsString& codec : codecs) {
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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 content type, not in an audio
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// content type.
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if (isWebMVideo &&
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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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// 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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} // namespace mozilla
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