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1c8af26369
When av1 video playback is enabled, declare it as supported in the webm container in MediaSource.IsTypeSupported. Also support special mime types of the form video/webm; codecs=vp9.experimental.<git-commit-id> so test sites can verify playback support of particular encodings while the av1 bitstream is under development.
107 lines
2.8 KiB
C++
107 lines
2.8 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 "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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#include "nsContentTypeParser.h"
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namespace mozilla {
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MediaDecoderStateMachine* WebMDecoder::CreateStateMachine()
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{
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mReader =
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new MediaFormatReader(this, new WebMDemuxer(GetResource()), GetVideoFrameContainer());
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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::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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#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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/* static */ bool
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WebMDecoder::CanHandleMediaType(const nsAString& aContentType)
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{
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nsContentTypeParser parser(aContentType);
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nsAutoString mimeType;
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nsresult rv = parser.GetType(mimeType);
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if (NS_FAILED(rv)) {
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return false;
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}
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nsString codecs;
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parser.GetParameter("codecs", codecs);
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return CanHandleMediaType(NS_ConvertUTF16toUTF8(mimeType),
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codecs);
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}
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void
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WebMDecoder::GetMozDebugReaderData(nsAString& 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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