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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
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