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/* -*- 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 "MediaPrefs.h"
#include "MediaDecoderStateMachine.h"
#include "MediaFormatReader.h"
#include "OggDemuxer.h"
#include "OggDecoder.h"
#include "nsContentTypeParser.h"
namespace mozilla {
MediaDecoderStateMachine* OggDecoder::CreateStateMachine()
{
RefPtr<OggDemuxer> demuxer = new OggDemuxer(GetResource());
RefPtr<MediaFormatReader> reader =
new MediaFormatReader(this, demuxer, GetVideoFrameContainer());
demuxer->SetChainingEvents(&reader->TimedMetadataProducer(),
&reader->MediaNotSeekableProducer());
return new MediaDecoderStateMachine(this, reader);
}
/* static */
bool
OggDecoder::IsEnabled()
{
return MediaPrefs::OggEnabled();
}
/* static */
bool
OggDecoder::CanHandleMediaType(const nsACString& aMIMETypeExcludingCodecs,
const nsAString& aCodecs)
{
if (!IsEnabled()) {
return false;
}
const bool isOggAudio = aMIMETypeExcludingCodecs.EqualsASCII("audio/ogg");
const bool isOggVideo =
aMIMETypeExcludingCodecs.EqualsASCII("video/ogg") ||
aMIMETypeExcludingCodecs.EqualsASCII("application/ogg");
if (!isOggAudio && !isOggVideo) {
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 ((IsOpusEnabled() && codec.EqualsLiteral("opus")) ||
codec.EqualsLiteral("vorbis") ||
(MediaPrefs::FlacInOgg() && codec.EqualsLiteral("flac"))) {
continue;
}
// Note: Only accept Theora in a video content type, not in an audio
// content type.
if (isOggVideo && codec.EqualsLiteral("theora")) {
continue;
}
// Some unsupported codec.
return false;
}
return true;
}
} // namespace mozilla
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