mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-13 13:25:37 +00:00
a35190cc6e
- WebMDemuxer will read crypto information from WebM metadata. - WebMDemumer adds crypto information to samples. - WebMDemuxer can now return encryption info from GetCrypto(). - WebMDexmuer will not attempt to peek encrypted frames as it will give back garbage data. This means resolution changes internal to encrypted WebM files will not work. - WebMDecoder now exposes a single string version of CanHandleMediaType. This is done in the same way as the Mp4Decoder, so that the future update to MediaKeySystemAccess for WebM handling can maintain the same conventions. MozReview-Commit-ID: CU3JVi3t7Vn --HG-- extra : transplant_source : %87gn%5Bm%B5t%EA%9F%5Bh%B4%3B%9D%5E%AE%AB%AF%12%0A
100 lines
2.6 KiB
C++
100 lines
2.6 KiB
C++
/* -*- 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
|
|
|