mirror of
https://github.com/mozilla/gecko-dev.git
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f17dd305d6
Continuing the work of replacing MIME strings with MediaContainerType, starting
from MediaResource and following the dependencies.
Most changes are mechanical: Just change ns*String into MediaContainerType, and
MIME string literals into MEDIAMIMETYPE("a/b").
Some checks for empty/invalid strings and lowercase comparisons can go, thanks
to the always-valid always-lowercase-MIME invariants of MediaContainerType.
One special case in is MediaSourceResource, which used to have an empty string
as its type (because its own type is not relevant, but its SourceBuffers carry
types). Because the inherited GetContentType *must* be overridden, and must
return a MediaContainerType, we needed a valid type even though it should not
be seen in the real world. I've chosen "application/x.mediasource" for that.
MozReview-Commit-ID: 1aCH75Kh2e6
--HG--
extra : rebase_source : 0d9cd9b69c264e5dcfc3845f80ee107f4bcbcd9a
1651 lines
49 KiB
C++
1651 lines
49 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/DebugOnly.h"
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#include "MediaResource.h"
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#include "MediaResourceCallback.h"
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#include "mozilla/Mutex.h"
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#include "nsDebug.h"
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#include "nsNetUtil.h"
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#include "nsThreadUtils.h"
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#include "nsIFile.h"
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#include "nsIFileChannel.h"
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#include "nsIFileStreams.h"
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#include "nsIHttpChannel.h"
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#include "nsISeekableStream.h"
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#include "nsIInputStream.h"
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#include "nsIRequestObserver.h"
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#include "nsIStreamListener.h"
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#include "nsIScriptSecurityManager.h"
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#include "mozilla/dom/HTMLMediaElement.h"
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#include "nsError.h"
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#include "nsICachingChannel.h"
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#include "nsIAsyncVerifyRedirectCallback.h"
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#include "nsContentUtils.h"
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#include "nsHostObjectProtocolHandler.h"
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#include <algorithm>
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#include "nsProxyRelease.h"
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#include "nsIContentPolicy.h"
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using mozilla::media::TimeUnit;
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mozilla::LazyLogModule gMediaResourceLog("MediaResource");
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#define RESOURCE_LOG(msg, ...) MOZ_LOG(gMediaResourceLog, mozilla::LogLevel::Debug, \
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(msg, ##__VA_ARGS__))
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// Debug logging macro with object pointer and class name.
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#define CMLOG(msg, ...) \
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RESOURCE_LOG("%p [ChannelMediaResource]: " msg, this, ##__VA_ARGS__)
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static const uint32_t HTTP_OK_CODE = 200;
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static const uint32_t HTTP_PARTIAL_RESPONSE_CODE = 206;
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namespace mozilla {
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void
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MediaResource::Destroy()
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{
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// Ensures we only delete the MediaResource on the main thread.
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if (NS_IsMainThread()) {
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delete this;
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return;
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}
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MOZ_ALWAYS_SUCCEEDS(
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NS_DispatchToMainThread(NewNonOwningRunnableMethod(this, &MediaResource::Destroy)));
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}
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NS_IMPL_ADDREF(MediaResource)
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NS_IMPL_RELEASE_WITH_DESTROY(MediaResource, Destroy())
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NS_IMPL_QUERY_INTERFACE0(MediaResource)
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ChannelMediaResource::ChannelMediaResource(MediaResourceCallback* aCallback,
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nsIChannel* aChannel,
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nsIURI* aURI,
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const MediaContainerType& aContainerType)
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: BaseMediaResource(aCallback, aChannel, aURI, aContainerType),
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mOffset(0),
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mReopenOnError(false),
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mIgnoreClose(false),
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mCacheStream(this),
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mLock("ChannelMediaResource.mLock"),
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mIgnoreResume(false),
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mSuspendAgent(mChannel)
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{
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}
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ChannelMediaResource::~ChannelMediaResource()
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{
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if (mListener) {
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// Kill its reference to us since we're going away
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mListener->Revoke();
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}
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}
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// ChannelMediaResource::Listener just observes the channel and
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// forwards notifications to the ChannelMediaResource. We use multiple
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// listener objects so that when we open a new stream for a seek we can
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// disconnect the old listener from the ChannelMediaResource and hook up
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// a new listener, so notifications from the old channel are discarded
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// and don't confuse us.
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NS_IMPL_ISUPPORTS(ChannelMediaResource::Listener,
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nsIRequestObserver, nsIStreamListener, nsIChannelEventSink,
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nsIInterfaceRequestor)
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nsresult
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ChannelMediaResource::Listener::OnStartRequest(nsIRequest* aRequest,
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nsISupports* aContext)
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{
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if (!mResource)
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return NS_OK;
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return mResource->OnStartRequest(aRequest);
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}
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nsresult
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ChannelMediaResource::Listener::OnStopRequest(nsIRequest* aRequest,
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nsISupports* aContext,
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nsresult aStatus)
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{
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if (!mResource)
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return NS_OK;
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return mResource->OnStopRequest(aRequest, aStatus);
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}
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nsresult
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ChannelMediaResource::Listener::OnDataAvailable(nsIRequest* aRequest,
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nsISupports* aContext,
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nsIInputStream* aStream,
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uint64_t aOffset,
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uint32_t aCount)
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{
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if (!mResource)
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return NS_OK;
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return mResource->OnDataAvailable(aRequest, aStream, aCount);
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}
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nsresult
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ChannelMediaResource::Listener::AsyncOnChannelRedirect(nsIChannel* aOldChannel,
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nsIChannel* aNewChannel,
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uint32_t aFlags,
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nsIAsyncVerifyRedirectCallback* cb)
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{
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nsresult rv = NS_OK;
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if (mResource)
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rv = mResource->OnChannelRedirect(aOldChannel, aNewChannel, aFlags);
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if (NS_FAILED(rv))
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return rv;
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cb->OnRedirectVerifyCallback(NS_OK);
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return NS_OK;
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}
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nsresult
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ChannelMediaResource::Listener::GetInterface(const nsIID & aIID, void **aResult)
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{
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return QueryInterface(aIID, aResult);
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}
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nsresult
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ChannelMediaResource::OnStartRequest(nsIRequest* aRequest)
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{
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NS_ASSERTION(mChannel.get() == aRequest, "Wrong channel!");
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MediaDecoderOwner* owner = mCallback->GetMediaOwner();
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NS_ENSURE_TRUE(owner, NS_ERROR_FAILURE);
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dom::HTMLMediaElement* element = owner->GetMediaElement();
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NS_ENSURE_TRUE(element, NS_ERROR_FAILURE);
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nsresult status;
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nsresult rv = aRequest->GetStatus(&status);
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NS_ENSURE_SUCCESS(rv, rv);
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if (status == NS_BINDING_ABORTED) {
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// Request was aborted before we had a chance to receive any data, or
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// even an OnStartRequest(). Close the channel. This is important, as
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// we don't want to mess up our state, as if we're cloned that would
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// cause the clone to copy incorrect metadata (like whether we're
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// infinite for example).
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CloseChannel();
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return status;
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}
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if (element->ShouldCheckAllowOrigin()) {
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// If the request was cancelled by nsCORSListenerProxy due to failing
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// the CORS security check, send an error through to the media element.
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if (status == NS_ERROR_DOM_BAD_URI) {
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mCallback->NotifyNetworkError();
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return NS_ERROR_DOM_BAD_URI;
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}
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}
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nsCOMPtr<nsIHttpChannel> hc = do_QueryInterface(aRequest);
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bool seekable = false;
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if (hc) {
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uint32_t responseStatus = 0;
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hc->GetResponseStatus(&responseStatus);
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bool succeeded = false;
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hc->GetRequestSucceeded(&succeeded);
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if (!succeeded && NS_SUCCEEDED(status)) {
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// HTTP-level error (e.g. 4xx); treat this as a fatal network-level error.
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// We might get this on a seek.
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// (Note that lower-level errors indicated by NS_FAILED(status) are
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// handled in OnStopRequest.)
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// A 416 error should treated as EOF here... it's possible
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// that we don't get Content-Length, we read N bytes, then we
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// suspend and resume, the resume reopens the channel and we seek to
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// offset N, but there are no more bytes, so we get a 416
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// "Requested Range Not Satisfiable".
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if (responseStatus == HTTP_REQUESTED_RANGE_NOT_SATISFIABLE_CODE) {
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// OnStopRequest will not be fired, so we need to do some of its
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// work here.
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mCacheStream.NotifyDataEnded(status);
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} else {
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mCallback->NotifyNetworkError();
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}
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// This disconnects our listener so we don't get any more data. We
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// certainly don't want an error page to end up in our cache!
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CloseChannel();
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return NS_OK;
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}
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nsAutoCString ranges;
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hc->GetResponseHeader(NS_LITERAL_CSTRING("Accept-Ranges"),
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ranges);
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bool acceptsRanges = ranges.EqualsLiteral("bytes");
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// True if this channel will not return an unbounded amount of data
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bool dataIsBounded = false;
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int64_t contentLength = -1;
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hc->GetContentLength(&contentLength);
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if (contentLength >= 0 &&
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(responseStatus == HTTP_OK_CODE ||
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responseStatus == HTTP_PARTIAL_RESPONSE_CODE)) {
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// "OK" status means Content-Length is for the whole resource.
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// Since that's bounded, we know we have a finite-length resource.
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dataIsBounded = true;
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}
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// Assume Range requests have a bounded upper limit unless the
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// Content-Range header tells us otherwise.
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bool boundedSeekLimit = true;
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// Check response code for byte-range requests (seeking, chunk requests).
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if (responseStatus == HTTP_PARTIAL_RESPONSE_CODE) {
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// Parse Content-Range header.
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int64_t rangeStart = 0;
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int64_t rangeEnd = 0;
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int64_t rangeTotal = 0;
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rv = ParseContentRangeHeader(hc, rangeStart, rangeEnd, rangeTotal);
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// We received 'Content-Range', so the server accepts range requests.
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bool gotRangeHeader = NS_SUCCEEDED(rv);
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if (gotRangeHeader) {
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// We received 'Content-Range', so the server accepts range requests.
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// Notify media cache about the length and start offset of data received.
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// Note: If aRangeTotal == -1, then the total bytes is unknown at this stage.
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// For now, tell the decoder that the stream is infinite.
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if (rangeTotal == -1) {
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boundedSeekLimit = false;
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} else {
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contentLength = std::max(contentLength, rangeTotal);
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}
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// Give some warnings if the ranges are unexpected.
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// XXX These could be error conditions.
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NS_WARNING_ASSERTION(
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mOffset == rangeStart,
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"response range start does not match current offset");
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mOffset = rangeStart;
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mCacheStream.NotifyDataStarted(rangeStart);
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}
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acceptsRanges = gotRangeHeader;
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} else if (mOffset > 0 && responseStatus == HTTP_OK_CODE) {
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// If we get an OK response but we were seeking, or requesting a byte
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// range, then we have to assume that seeking doesn't work. We also need
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// to tell the cache that it's getting data for the start of the stream.
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mCacheStream.NotifyDataStarted(0);
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mOffset = 0;
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// The server claimed it supported range requests. It lied.
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acceptsRanges = false;
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}
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if (mOffset == 0 && contentLength >= 0 &&
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(responseStatus == HTTP_OK_CODE ||
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responseStatus == HTTP_PARTIAL_RESPONSE_CODE)) {
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mCacheStream.NotifyDataLength(contentLength);
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}
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// XXX we probably should examine the Content-Range header in case
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// the server gave us a range which is not quite what we asked for
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// If we get an HTTP_OK_CODE response to our byte range request,
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// and the server isn't sending Accept-Ranges:bytes then we don't
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// support seeking.
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seekable = acceptsRanges;
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if (seekable && boundedSeekLimit) {
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// If range requests are supported, and we did not see an unbounded
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// upper range limit, we assume the resource is bounded.
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dataIsBounded = true;
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}
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mCallback->SetInfinite(!dataIsBounded);
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}
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mCacheStream.SetTransportSeekable(seekable);
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{
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MutexAutoLock lock(mLock);
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mChannelStatistics->Start();
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}
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mReopenOnError = false;
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mIgnoreClose = false;
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mSuspendAgent.UpdateSuspendedStatusIfNeeded();
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// Fires an initial progress event.
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owner->DownloadProgressed();
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return NS_OK;
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}
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bool
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ChannelMediaResource::IsTransportSeekable()
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{
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return mCacheStream.IsTransportSeekable();
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}
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nsresult
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ChannelMediaResource::ParseContentRangeHeader(nsIHttpChannel * aHttpChan,
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int64_t& aRangeStart,
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int64_t& aRangeEnd,
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int64_t& aRangeTotal)
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{
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NS_ENSURE_ARG(aHttpChan);
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nsAutoCString rangeStr;
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nsresult rv = aHttpChan->GetResponseHeader(NS_LITERAL_CSTRING("Content-Range"),
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rangeStr);
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NS_ENSURE_SUCCESS(rv, rv);
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NS_ENSURE_FALSE(rangeStr.IsEmpty(), NS_ERROR_ILLEGAL_VALUE);
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// Parse the range header: e.g. Content-Range: bytes 7000-7999/8000.
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int32_t spacePos = rangeStr.Find(NS_LITERAL_CSTRING(" "));
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int32_t dashPos = rangeStr.Find(NS_LITERAL_CSTRING("-"), true, spacePos);
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int32_t slashPos = rangeStr.Find(NS_LITERAL_CSTRING("/"), true, dashPos);
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nsAutoCString aRangeStartText;
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rangeStr.Mid(aRangeStartText, spacePos+1, dashPos-(spacePos+1));
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aRangeStart = aRangeStartText.ToInteger64(&rv);
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NS_ENSURE_SUCCESS(rv, rv);
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NS_ENSURE_TRUE(0 <= aRangeStart, NS_ERROR_ILLEGAL_VALUE);
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nsAutoCString aRangeEndText;
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rangeStr.Mid(aRangeEndText, dashPos+1, slashPos-(dashPos+1));
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aRangeEnd = aRangeEndText.ToInteger64(&rv);
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NS_ENSURE_SUCCESS(rv, rv);
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NS_ENSURE_TRUE(aRangeStart < aRangeEnd, NS_ERROR_ILLEGAL_VALUE);
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nsAutoCString aRangeTotalText;
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rangeStr.Right(aRangeTotalText, rangeStr.Length()-(slashPos+1));
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if (aRangeTotalText[0] == '*') {
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aRangeTotal = -1;
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} else {
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aRangeTotal = aRangeTotalText.ToInteger64(&rv);
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NS_ENSURE_TRUE(aRangeEnd < aRangeTotal, NS_ERROR_ILLEGAL_VALUE);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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CMLOG("Received bytes [%lld] to [%lld] of [%lld] for decoder[%p]",
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aRangeStart, aRangeEnd, aRangeTotal, mCallback.get());
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return NS_OK;
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}
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nsresult
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ChannelMediaResource::OnStopRequest(nsIRequest* aRequest, nsresult aStatus)
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{
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NS_ASSERTION(mChannel.get() == aRequest, "Wrong channel!");
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NS_ASSERTION(!mSuspendAgent.IsSuspended(),
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"How can OnStopRequest fire while we're suspended?");
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{
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MutexAutoLock lock(mLock);
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mChannelStatistics->Stop();
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}
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// Note that aStatus might have succeeded --- this might be a normal close
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// --- even in situations where the server cut us off because we were
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// suspended. So we need to "reopen on error" in that case too. The only
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// cases where we don't need to reopen are when *we* closed the stream.
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// But don't reopen if we need to seek and we don't think we can... that would
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// cause us to just re-read the stream, which would be really bad.
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if (mReopenOnError &&
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aStatus != NS_ERROR_PARSED_DATA_CACHED && aStatus != NS_BINDING_ABORTED &&
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(mOffset == 0 || mCacheStream.IsTransportSeekable())) {
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// If the stream did close normally, then if the server is seekable we'll
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// just seek to the end of the resource and get an HTTP 416 error because
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// there's nothing there, so this isn't bad.
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nsresult rv = CacheClientSeek(mOffset, false);
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if (NS_SUCCEEDED(rv))
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return rv;
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// If the reopen/reseek fails, just fall through and treat this
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// error as fatal.
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}
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if (!mIgnoreClose) {
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mCacheStream.NotifyDataEnded(aStatus);
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|
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// Move this request back into the foreground. This is necessary for
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// requests owned by video documents to ensure the load group fires
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// OnStopRequest when restoring from session history.
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nsLoadFlags loadFlags;
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DebugOnly<nsresult> rv = mChannel->GetLoadFlags(&loadFlags);
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NS_ASSERTION(NS_SUCCEEDED(rv), "GetLoadFlags() failed!");
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|
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if (loadFlags & nsIRequest::LOAD_BACKGROUND) {
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ModifyLoadFlags(loadFlags & ~nsIRequest::LOAD_BACKGROUND);
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}
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}
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return NS_OK;
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}
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nsresult
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ChannelMediaResource::OnChannelRedirect(nsIChannel* aOld, nsIChannel* aNew,
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uint32_t aFlags)
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{
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mChannel = aNew;
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mSuspendAgent.NotifyChannelOpened(mChannel);
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return SetupChannelHeaders();
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}
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|
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struct CopySegmentClosure {
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nsCOMPtr<nsIPrincipal> mPrincipal;
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ChannelMediaResource* mResource;
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};
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|
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nsresult
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ChannelMediaResource::CopySegmentToCache(nsIInputStream *aInStream,
|
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void *aClosure,
|
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const char *aFromSegment,
|
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uint32_t aToOffset,
|
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uint32_t aCount,
|
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uint32_t *aWriteCount)
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|
{
|
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CopySegmentClosure* closure = static_cast<CopySegmentClosure*>(aClosure);
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|
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closure->mResource->mCallback->NotifyDataArrived();
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|
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// Keep track of where we're up to.
|
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RESOURCE_LOG("%p [ChannelMediaResource]: CopySegmentToCache at mOffset [%lld] add "
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"[%d] bytes for decoder[%p]",
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closure->mResource, closure->mResource->mOffset, aCount,
|
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closure->mResource->mCallback.get());
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closure->mResource->mOffset += aCount;
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|
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closure->mResource->mCacheStream.NotifyDataReceived(aCount, aFromSegment,
|
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closure->mPrincipal);
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*aWriteCount = aCount;
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return NS_OK;
|
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}
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|
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nsresult
|
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ChannelMediaResource::OnDataAvailable(nsIRequest* aRequest,
|
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nsIInputStream* aStream,
|
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uint32_t aCount)
|
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{
|
|
NS_ASSERTION(mChannel.get() == aRequest, "Wrong channel!");
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|
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{
|
|
MutexAutoLock lock(mLock);
|
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mChannelStatistics->AddBytes(aCount);
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}
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|
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CopySegmentClosure closure;
|
|
nsIScriptSecurityManager* secMan = nsContentUtils::GetSecurityManager();
|
|
if (secMan && mChannel) {
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secMan->GetChannelResultPrincipal(mChannel, getter_AddRefs(closure.mPrincipal));
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}
|
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closure.mResource = this;
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|
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uint32_t count = aCount;
|
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while (count > 0) {
|
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uint32_t read;
|
|
nsresult rv = aStream->ReadSegments(CopySegmentToCache, &closure, count,
|
|
&read);
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
NS_ASSERTION(read > 0, "Read 0 bytes while data was available?");
|
|
count -= read;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult ChannelMediaResource::Open(nsIStreamListener **aStreamListener)
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
|
|
|
|
if (!mChannelStatistics) {
|
|
mChannelStatistics = new MediaChannelStatistics();
|
|
}
|
|
|
|
nsresult rv = mCacheStream.Init();
|
|
if (NS_FAILED(rv))
|
|
return rv;
|
|
NS_ASSERTION(mOffset == 0, "Who set mOffset already?");
|
|
|
|
if (!mChannel) {
|
|
// When we're a clone, the decoder might ask us to Open even though
|
|
// we haven't established an mChannel (because we might not need one)
|
|
NS_ASSERTION(!aStreamListener,
|
|
"Should have already been given a channel if we're to return a stream listener");
|
|
return NS_OK;
|
|
}
|
|
|
|
return OpenChannel(aStreamListener);
|
|
}
|
|
|
|
nsresult ChannelMediaResource::OpenChannel(nsIStreamListener** aStreamListener)
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
|
|
NS_ENSURE_TRUE(mChannel, NS_ERROR_NULL_POINTER);
|
|
NS_ASSERTION(!mListener, "Listener should have been removed by now");
|
|
|
|
if (aStreamListener) {
|
|
*aStreamListener = nullptr;
|
|
}
|
|
|
|
// Set the content length, if it's available as an HTTP header.
|
|
// This ensures that MediaResource wrapping objects for platform libraries
|
|
// that expect to know the length of a resource can get it before
|
|
// OnStartRequest() fires.
|
|
nsCOMPtr<nsIHttpChannel> hc = do_QueryInterface(mChannel);
|
|
if (hc) {
|
|
int64_t cl = -1;
|
|
if (NS_SUCCEEDED(hc->GetContentLength(&cl)) && cl != -1) {
|
|
mCacheStream.NotifyDataLength(cl);
|
|
}
|
|
}
|
|
|
|
mListener = new Listener(this);
|
|
if (aStreamListener) {
|
|
*aStreamListener = mListener;
|
|
NS_ADDREF(*aStreamListener);
|
|
} else {
|
|
nsresult rv = mChannel->SetNotificationCallbacks(mListener.get());
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = SetupChannelHeaders();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = mChannel->AsyncOpen2(mListener);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Tell the media element that we are fetching data from a channel.
|
|
MediaDecoderOwner* owner = mCallback->GetMediaOwner();
|
|
NS_ENSURE_TRUE(owner, NS_ERROR_FAILURE);
|
|
dom::HTMLMediaElement* element = owner->GetMediaElement();
|
|
element->DownloadResumed(true);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult ChannelMediaResource::SetupChannelHeaders()
|
|
{
|
|
// Always use a byte range request even if we're reading from the start
|
|
// of the resource.
|
|
// This enables us to detect if the stream supports byte range
|
|
// requests, and therefore seeking, early.
|
|
nsCOMPtr<nsIHttpChannel> hc = do_QueryInterface(mChannel);
|
|
if (hc) {
|
|
// Use |mOffset| if seeking in a complete file download.
|
|
nsAutoCString rangeString("bytes=");
|
|
rangeString.AppendInt(mOffset);
|
|
rangeString.Append('-');
|
|
nsresult rv = hc->SetRequestHeader(NS_LITERAL_CSTRING("Range"), rangeString, false);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// Send Accept header for video and audio types only (Bug 489071)
|
|
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
|
|
MediaDecoderOwner* owner = mCallback->GetMediaOwner();
|
|
NS_ENSURE_TRUE(owner, NS_ERROR_FAILURE);
|
|
dom::HTMLMediaElement* element = owner->GetMediaElement();
|
|
NS_ENSURE_TRUE(element, NS_ERROR_FAILURE);
|
|
element->SetRequestHeaders(hc);
|
|
} else {
|
|
NS_ASSERTION(mOffset == 0, "Don't know how to seek on this channel type");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult ChannelMediaResource::Close()
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
|
|
|
|
mCacheStream.Close();
|
|
CloseChannel();
|
|
return NS_OK;
|
|
}
|
|
|
|
already_AddRefed<nsIPrincipal> ChannelMediaResource::GetCurrentPrincipal()
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
|
|
|
|
nsCOMPtr<nsIPrincipal> principal = mCacheStream.GetCurrentPrincipal();
|
|
return principal.forget();
|
|
}
|
|
|
|
bool ChannelMediaResource::CanClone()
|
|
{
|
|
return mCacheStream.IsAvailableForSharing();
|
|
}
|
|
|
|
already_AddRefed<MediaResource> ChannelMediaResource::CloneData(MediaResourceCallback* aCallback)
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
|
|
NS_ASSERTION(mCacheStream.IsAvailableForSharing(), "Stream can't be cloned");
|
|
|
|
RefPtr<ChannelMediaResource> resource =
|
|
new ChannelMediaResource(aCallback,
|
|
nullptr,
|
|
mURI,
|
|
GetContentType());
|
|
if (resource) {
|
|
// Initially the clone is treated as suspended by the cache, because
|
|
// we don't have a channel. If the cache needs to read data from the clone
|
|
// it will call CacheClientResume (or CacheClientSeek with aResume true)
|
|
// which will recreate the channel. This way, if all of the media data
|
|
// is already in the cache we don't create an unnecessary HTTP channel
|
|
// and perform a useless HTTP transaction.
|
|
resource->mSuspendAgent.Suspend();
|
|
resource->mCacheStream.InitAsClone(&mCacheStream);
|
|
resource->mChannelStatistics = new MediaChannelStatistics(mChannelStatistics);
|
|
resource->mChannelStatistics->Stop();
|
|
}
|
|
return resource.forget();
|
|
}
|
|
|
|
void ChannelMediaResource::CloseChannel()
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
|
|
|
|
{
|
|
MutexAutoLock lock(mLock);
|
|
mChannelStatistics->Stop();
|
|
}
|
|
|
|
if (mListener) {
|
|
mListener->Revoke();
|
|
mListener = nullptr;
|
|
}
|
|
|
|
if (mChannel) {
|
|
mSuspendAgent.NotifyChannelClosing();
|
|
// The status we use here won't be passed to the decoder, since
|
|
// we've already revoked the listener. It can however be passed
|
|
// to nsDocumentViewer::LoadComplete if our channel is the one
|
|
// that kicked off creation of a video document. We don't want that
|
|
// document load to think there was an error.
|
|
// NS_ERROR_PARSED_DATA_CACHED is the best thing we have for that
|
|
// at the moment.
|
|
mChannel->Cancel(NS_ERROR_PARSED_DATA_CACHED);
|
|
mChannel = nullptr;
|
|
}
|
|
}
|
|
|
|
nsresult ChannelMediaResource::ReadFromCache(char* aBuffer,
|
|
int64_t aOffset,
|
|
uint32_t aCount)
|
|
{
|
|
return mCacheStream.ReadFromCache(aBuffer, aOffset, aCount);
|
|
}
|
|
|
|
nsresult ChannelMediaResource::ReadAt(int64_t aOffset,
|
|
char* aBuffer,
|
|
uint32_t aCount,
|
|
uint32_t* aBytes)
|
|
{
|
|
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
|
|
|
|
nsresult rv = mCacheStream.ReadAt(aOffset, aBuffer, aCount, aBytes);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
DispatchBytesConsumed(*aBytes, aOffset);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
already_AddRefed<MediaByteBuffer>
|
|
ChannelMediaResource::MediaReadAt(int64_t aOffset, uint32_t aCount)
|
|
{
|
|
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
|
|
|
|
RefPtr<MediaByteBuffer> bytes = new MediaByteBuffer();
|
|
bool ok = bytes->SetLength(aCount, fallible);
|
|
NS_ENSURE_TRUE(ok, nullptr);
|
|
char* curr = reinterpret_cast<char*>(bytes->Elements());
|
|
const char* start = curr;
|
|
while (aCount > 0) {
|
|
uint32_t bytesRead;
|
|
nsresult rv = mCacheStream.ReadAt(aOffset, curr, aCount, &bytesRead);
|
|
NS_ENSURE_SUCCESS(rv, nullptr);
|
|
if (!bytesRead) {
|
|
break;
|
|
}
|
|
aOffset += bytesRead;
|
|
aCount -= bytesRead;
|
|
curr += bytesRead;
|
|
}
|
|
bytes->SetLength(curr - start);
|
|
return bytes.forget();
|
|
}
|
|
|
|
int64_t ChannelMediaResource::Tell()
|
|
{
|
|
return mCacheStream.Tell();
|
|
}
|
|
|
|
nsresult ChannelMediaResource::GetCachedRanges(MediaByteRangeSet& aRanges)
|
|
{
|
|
return mCacheStream.GetCachedRanges(aRanges);
|
|
}
|
|
|
|
void ChannelMediaResource::Suspend(bool aCloseImmediately)
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
|
|
|
|
MediaDecoderOwner* owner = mCallback->GetMediaOwner();
|
|
if (!owner) {
|
|
// Shutting down; do nothing.
|
|
return;
|
|
}
|
|
dom::HTMLMediaElement* element = owner->GetMediaElement();
|
|
if (!element) {
|
|
// Shutting down; do nothing.
|
|
return;
|
|
}
|
|
|
|
if (mChannel && aCloseImmediately && mCacheStream.IsTransportSeekable()) {
|
|
// Kill off our channel right now, but don't tell anyone about it.
|
|
mIgnoreClose = true;
|
|
CloseChannel();
|
|
element->DownloadSuspended();
|
|
}
|
|
|
|
if (mSuspendAgent.Suspend()) {
|
|
if (mChannel) {
|
|
{
|
|
MutexAutoLock lock(mLock);
|
|
mChannelStatistics->Stop();
|
|
}
|
|
element->DownloadSuspended();
|
|
}
|
|
}
|
|
}
|
|
|
|
void ChannelMediaResource::Resume()
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
|
|
|
|
MediaDecoderOwner* owner = mCallback->GetMediaOwner();
|
|
if (!owner) {
|
|
// Shutting down; do nothing.
|
|
return;
|
|
}
|
|
dom::HTMLMediaElement* element = owner->GetMediaElement();
|
|
if (!element) {
|
|
// Shutting down; do nothing.
|
|
return;
|
|
}
|
|
|
|
if (mSuspendAgent.Resume()) {
|
|
if (mChannel) {
|
|
// Just wake up our existing channel
|
|
{
|
|
MutexAutoLock lock(mLock);
|
|
mChannelStatistics->Start();
|
|
}
|
|
// if an error occurs after Resume, assume it's because the server
|
|
// timed out the connection and we should reopen it.
|
|
mReopenOnError = true;
|
|
element->DownloadResumed();
|
|
} else {
|
|
int64_t totalLength = mCacheStream.GetLength();
|
|
// If mOffset is at the end of the stream, then we shouldn't try to
|
|
// seek to it. The seek will fail and be wasted anyway. We can leave
|
|
// the channel dead; if the media cache wants to read some other data
|
|
// in the future, it will call CacheClientSeek itself which will reopen the
|
|
// channel.
|
|
if (totalLength < 0 || mOffset < totalLength) {
|
|
// There is (or may be) data to read at mOffset, so start reading it.
|
|
// Need to recreate the channel.
|
|
CacheClientSeek(mOffset, false);
|
|
element->DownloadResumed();
|
|
} else {
|
|
// The channel remains dead. Do not notify DownloadResumed() which
|
|
// will leave the media element in NETWORK_LOADING state.
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
ChannelMediaResource::RecreateChannel()
|
|
{
|
|
nsLoadFlags loadFlags =
|
|
nsICachingChannel::LOAD_BYPASS_LOCAL_CACHE_IF_BUSY |
|
|
nsIChannel::LOAD_CLASSIFY_URI |
|
|
(mLoadInBackground ? nsIRequest::LOAD_BACKGROUND : 0);
|
|
|
|
MediaDecoderOwner* owner = mCallback->GetMediaOwner();
|
|
if (!owner) {
|
|
// The decoder is being shut down, so don't bother opening a new channel
|
|
return NS_OK;
|
|
}
|
|
dom::HTMLMediaElement* element = owner->GetMediaElement();
|
|
if (!element) {
|
|
// The decoder is being shut down, so don't bother opening a new channel
|
|
return NS_OK;
|
|
}
|
|
nsCOMPtr<nsILoadGroup> loadGroup = element->GetDocumentLoadGroup();
|
|
NS_ENSURE_TRUE(loadGroup, NS_ERROR_NULL_POINTER);
|
|
|
|
nsSecurityFlags securityFlags = element->ShouldCheckAllowOrigin()
|
|
? nsILoadInfo::SEC_REQUIRE_CORS_DATA_INHERITS
|
|
: nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_INHERITS;
|
|
|
|
MOZ_ASSERT(element->IsAnyOfHTMLElements(nsGkAtoms::audio, nsGkAtoms::video));
|
|
nsContentPolicyType contentPolicyType = element->IsHTMLElement(nsGkAtoms::audio) ?
|
|
nsIContentPolicy::TYPE_INTERNAL_AUDIO : nsIContentPolicy::TYPE_INTERNAL_VIDEO;
|
|
|
|
nsresult rv = NS_NewChannel(getter_AddRefs(mChannel),
|
|
mURI,
|
|
element,
|
|
securityFlags,
|
|
contentPolicyType,
|
|
loadGroup,
|
|
nullptr, // aCallbacks
|
|
loadFlags);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// We have cached the Content-Type, which should not change. Give a hint to
|
|
// the channel to avoid a sniffing failure, which would be expected because we
|
|
// are probably seeking in the middle of the bitstream, and sniffing relies
|
|
// on the presence of a magic number at the beginning of the stream.
|
|
mChannel->SetContentType(GetContentType().OriginalString());
|
|
mSuspendAgent.NotifyChannelOpened(mChannel);
|
|
|
|
// Tell the cache to reset the download status when the channel is reopened.
|
|
mCacheStream.NotifyChannelRecreated();
|
|
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
ChannelMediaResource::DoNotifyDataReceived()
|
|
{
|
|
mDataReceivedEvent.Revoke();
|
|
mCallback->NotifyBytesDownloaded();
|
|
}
|
|
|
|
void
|
|
ChannelMediaResource::CacheClientNotifyDataReceived()
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
|
|
// NOTE: this can be called with the media cache lock held, so don't
|
|
// block or do anything which might try to acquire a lock!
|
|
|
|
if (mDataReceivedEvent.IsPending())
|
|
return;
|
|
|
|
mDataReceivedEvent =
|
|
NewNonOwningRunnableMethod(this, &ChannelMediaResource::DoNotifyDataReceived);
|
|
NS_DispatchToMainThread(mDataReceivedEvent.get());
|
|
}
|
|
|
|
void
|
|
ChannelMediaResource::CacheClientNotifyDataEnded(nsresult aStatus)
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
mCallback->NotifyDataEnded(aStatus);
|
|
}
|
|
|
|
void
|
|
ChannelMediaResource::CacheClientNotifyPrincipalChanged()
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
|
|
|
|
mCallback->NotifyPrincipalChanged();
|
|
}
|
|
|
|
void
|
|
ChannelMediaResource::CacheClientNotifySuspendedStatusChanged()
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
|
|
mCallback->NotifySuspendedStatusChanged();
|
|
}
|
|
|
|
nsresult
|
|
ChannelMediaResource::CacheClientSeek(int64_t aOffset, bool aResume)
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
|
|
|
|
CMLOG("CacheClientSeek requested for aOffset [%lld] for decoder [%p]",
|
|
aOffset, mCallback.get());
|
|
|
|
CloseChannel();
|
|
|
|
mOffset = aOffset;
|
|
|
|
// Don't report close of the channel because the channel is not closed for
|
|
// download ended, but for internal changes in the read position.
|
|
mIgnoreClose = true;
|
|
|
|
if (aResume) {
|
|
mSuspendAgent.Resume();
|
|
}
|
|
|
|
// Don't create a new channel if we are still suspended. The channel will
|
|
// be recreated when we are resumed.
|
|
if (mSuspendAgent.IsSuspended()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult rv = RecreateChannel();
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
return OpenChannel(nullptr);
|
|
}
|
|
|
|
void
|
|
ChannelMediaResource::FlushCache()
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Should be on main thread.");
|
|
|
|
// Ensure that data in the cache's partial block is written to disk.
|
|
mCacheStream.FlushPartialBlock();
|
|
}
|
|
|
|
void
|
|
ChannelMediaResource::NotifyLastByteRange()
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Should be on main thread.");
|
|
|
|
// Tell media cache that the last data has been downloaded.
|
|
// Note: subsequent seeks will require re-opening the channel etc.
|
|
mCacheStream.NotifyDataEnded(NS_OK);
|
|
|
|
}
|
|
|
|
nsresult
|
|
ChannelMediaResource::CacheClientSuspend()
|
|
{
|
|
Suspend(false);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
ChannelMediaResource::CacheClientResume()
|
|
{
|
|
Resume();
|
|
return NS_OK;
|
|
}
|
|
|
|
int64_t
|
|
ChannelMediaResource::GetNextCachedData(int64_t aOffset)
|
|
{
|
|
return mCacheStream.GetNextCachedData(aOffset);
|
|
}
|
|
|
|
int64_t
|
|
ChannelMediaResource::GetCachedDataEnd(int64_t aOffset)
|
|
{
|
|
return mCacheStream.GetCachedDataEnd(aOffset);
|
|
}
|
|
|
|
bool
|
|
ChannelMediaResource::IsDataCachedToEndOfResource(int64_t aOffset)
|
|
{
|
|
return mCacheStream.IsDataCachedToEndOfStream(aOffset);
|
|
}
|
|
|
|
void
|
|
ChannelMediaResource::EnsureCacheUpToDate()
|
|
{
|
|
mCacheStream.EnsureCacheUpdate();
|
|
}
|
|
|
|
bool
|
|
ChannelMediaResource::IsSuspendedByCache()
|
|
{
|
|
return mCacheStream.AreAllStreamsForResourceSuspended();
|
|
}
|
|
|
|
bool
|
|
ChannelMediaResource::IsSuspended()
|
|
{
|
|
return mSuspendAgent.IsSuspended();
|
|
}
|
|
|
|
void
|
|
ChannelMediaResource::SetReadMode(MediaCacheStream::ReadMode aMode)
|
|
{
|
|
mCacheStream.SetReadMode(aMode);
|
|
}
|
|
|
|
void
|
|
ChannelMediaResource::SetPlaybackRate(uint32_t aBytesPerSecond)
|
|
{
|
|
mCacheStream.SetPlaybackRate(aBytesPerSecond);
|
|
}
|
|
|
|
void
|
|
ChannelMediaResource::Pin()
|
|
{
|
|
mCacheStream.Pin();
|
|
}
|
|
|
|
void
|
|
ChannelMediaResource::Unpin()
|
|
{
|
|
mCacheStream.Unpin();
|
|
}
|
|
|
|
double
|
|
ChannelMediaResource::GetDownloadRate(bool* aIsReliable)
|
|
{
|
|
MutexAutoLock lock(mLock);
|
|
return mChannelStatistics->GetRate(aIsReliable);
|
|
}
|
|
|
|
int64_t
|
|
ChannelMediaResource::GetLength()
|
|
{
|
|
return mCacheStream.GetLength();
|
|
}
|
|
|
|
// ChannelSuspendAgent
|
|
|
|
bool
|
|
ChannelSuspendAgent::Suspend()
|
|
{
|
|
SuspendInternal();
|
|
return (++mSuspendCount == 1);
|
|
}
|
|
|
|
void
|
|
ChannelSuspendAgent::SuspendInternal()
|
|
{
|
|
if (mChannel) {
|
|
bool isPending = false;
|
|
nsresult rv = mChannel->IsPending(&isPending);
|
|
if (NS_SUCCEEDED(rv) && isPending && !mIsChannelSuspended) {
|
|
mChannel->Suspend();
|
|
mIsChannelSuspended = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
bool
|
|
ChannelSuspendAgent::Resume()
|
|
{
|
|
MOZ_ASSERT(IsSuspended(), "Resume without suspend!");
|
|
--mSuspendCount;
|
|
|
|
if (mSuspendCount == 0) {
|
|
if (mChannel && mIsChannelSuspended) {
|
|
mChannel->Resume();
|
|
mIsChannelSuspended = false;
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void
|
|
ChannelSuspendAgent::UpdateSuspendedStatusIfNeeded()
|
|
{
|
|
if (!mIsChannelSuspended && IsSuspended()) {
|
|
SuspendInternal();
|
|
}
|
|
}
|
|
|
|
void
|
|
ChannelSuspendAgent::NotifyChannelOpened(nsIChannel* aChannel)
|
|
{
|
|
MOZ_ASSERT(aChannel);
|
|
mChannel = aChannel;
|
|
}
|
|
|
|
void
|
|
ChannelSuspendAgent::NotifyChannelClosing()
|
|
{
|
|
MOZ_ASSERT(mChannel);
|
|
// Before close the channel, it need to be resumed to make sure its internal
|
|
// state is correct. Besides, We need to suspend the channel after recreating.
|
|
if (mIsChannelSuspended) {
|
|
mChannel->Resume();
|
|
mIsChannelSuspended = false;
|
|
}
|
|
mChannel = nullptr;
|
|
}
|
|
|
|
bool
|
|
ChannelSuspendAgent::IsSuspended()
|
|
{
|
|
return (mSuspendCount > 0);
|
|
}
|
|
|
|
// FileMediaResource
|
|
|
|
class FileMediaResource : public BaseMediaResource
|
|
{
|
|
public:
|
|
FileMediaResource(MediaResourceCallback* aCallback,
|
|
nsIChannel* aChannel,
|
|
nsIURI* aURI,
|
|
const MediaContainerType& aContainerType) :
|
|
BaseMediaResource(aCallback, aChannel, aURI, aContainerType),
|
|
mSize(-1),
|
|
mLock("FileMediaResource.mLock"),
|
|
mSizeInitialized(false)
|
|
{
|
|
}
|
|
~FileMediaResource()
|
|
{
|
|
}
|
|
|
|
// Main thread
|
|
nsresult Open(nsIStreamListener** aStreamListener) override;
|
|
nsresult Close() override;
|
|
void Suspend(bool aCloseImmediately) override {}
|
|
void Resume() override {}
|
|
already_AddRefed<nsIPrincipal> GetCurrentPrincipal() override;
|
|
bool CanClone() override;
|
|
already_AddRefed<MediaResource> CloneData(MediaResourceCallback* aCallback) override;
|
|
nsresult ReadFromCache(char* aBuffer, int64_t aOffset, uint32_t aCount) override;
|
|
|
|
// These methods are called off the main thread.
|
|
|
|
// Other thread
|
|
void SetReadMode(MediaCacheStream::ReadMode aMode) override {}
|
|
void SetPlaybackRate(uint32_t aBytesPerSecond) override {}
|
|
nsresult ReadAt(int64_t aOffset, char* aBuffer,
|
|
uint32_t aCount, uint32_t* aBytes) override;
|
|
already_AddRefed<MediaByteBuffer> MediaReadAt(int64_t aOffset, uint32_t aCount) override;
|
|
int64_t Tell() override;
|
|
|
|
// Any thread
|
|
void Pin() override {}
|
|
void Unpin() override {}
|
|
double GetDownloadRate(bool* aIsReliable) override
|
|
{
|
|
// The data's all already here
|
|
*aIsReliable = true;
|
|
return 100*1024*1024; // arbitray, use 100MB/s
|
|
}
|
|
int64_t GetLength() override {
|
|
MutexAutoLock lock(mLock);
|
|
|
|
EnsureSizeInitialized();
|
|
return mSizeInitialized ? mSize : 0;
|
|
}
|
|
int64_t GetNextCachedData(int64_t aOffset) override
|
|
{
|
|
MutexAutoLock lock(mLock);
|
|
|
|
EnsureSizeInitialized();
|
|
return (aOffset < mSize) ? aOffset : -1;
|
|
}
|
|
int64_t GetCachedDataEnd(int64_t aOffset) override {
|
|
MutexAutoLock lock(mLock);
|
|
|
|
EnsureSizeInitialized();
|
|
return std::max(aOffset, mSize);
|
|
}
|
|
bool IsDataCachedToEndOfResource(int64_t aOffset) override { return true; }
|
|
bool IsSuspendedByCache() override { return true; }
|
|
bool IsSuspended() override { return true; }
|
|
bool IsTransportSeekable() override { return true; }
|
|
|
|
nsresult GetCachedRanges(MediaByteRangeSet& aRanges) override;
|
|
|
|
size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override
|
|
{
|
|
// Might be useful to track in the future:
|
|
// - mInput
|
|
return BaseMediaResource::SizeOfExcludingThis(aMallocSizeOf);
|
|
}
|
|
|
|
size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override
|
|
{
|
|
return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
|
|
}
|
|
|
|
protected:
|
|
// These Unsafe variants of Read and Seek perform their operations
|
|
// without acquiring mLock. The caller must obtain the lock before
|
|
// calling. The implmentation of Read, Seek and ReadAt obtains the
|
|
// lock before calling these Unsafe variants to read or seek.
|
|
nsresult UnsafeRead(char* aBuffer, uint32_t aCount, uint32_t* aBytes);
|
|
nsresult UnsafeSeek(int32_t aWhence, int64_t aOffset);
|
|
private:
|
|
// Ensures mSize is initialized, if it can be.
|
|
// mLock must be held when this is called, and mInput must be non-null.
|
|
void EnsureSizeInitialized();
|
|
already_AddRefed<MediaByteBuffer> UnsafeMediaReadAt(
|
|
int64_t aOffset, uint32_t aCount);
|
|
|
|
// The file size, or -1 if not known. Immutable after Open().
|
|
// Can be used from any thread.
|
|
int64_t mSize;
|
|
|
|
// This lock handles synchronisation between calls to Close() and
|
|
// the Read, Seek, etc calls. Close must not be called while a
|
|
// Read or Seek is in progress since it resets various internal
|
|
// values to null.
|
|
// This lock protects mSeekable, mInput, mSize, and mSizeInitialized.
|
|
Mutex mLock;
|
|
|
|
// Seekable stream interface to file. This can be used from any
|
|
// thread.
|
|
nsCOMPtr<nsISeekableStream> mSeekable;
|
|
|
|
// Input stream for the media data. This can be used from any
|
|
// thread.
|
|
nsCOMPtr<nsIInputStream> mInput;
|
|
|
|
// Whether we've attempted to initialize mSize. Note that mSize can be -1
|
|
// when mSizeInitialized is true if we tried and failed to get the size
|
|
// of the file.
|
|
bool mSizeInitialized;
|
|
};
|
|
|
|
void FileMediaResource::EnsureSizeInitialized()
|
|
{
|
|
mLock.AssertCurrentThreadOwns();
|
|
NS_ASSERTION(mInput, "Must have file input stream");
|
|
if (mSizeInitialized) {
|
|
return;
|
|
}
|
|
mSizeInitialized = true;
|
|
// Get the file size and inform the decoder.
|
|
uint64_t size;
|
|
nsresult res = mInput->Available(&size);
|
|
if (NS_SUCCEEDED(res) && size <= INT64_MAX) {
|
|
mSize = (int64_t)size;
|
|
mCallback->NotifyDataEnded(NS_OK);
|
|
}
|
|
}
|
|
|
|
nsresult FileMediaResource::GetCachedRanges(MediaByteRangeSet& aRanges)
|
|
{
|
|
MutexAutoLock lock(mLock);
|
|
|
|
EnsureSizeInitialized();
|
|
if (mSize == -1) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
aRanges += MediaByteRange(0, mSize);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult FileMediaResource::Open(nsIStreamListener** aStreamListener)
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
|
|
|
|
if (aStreamListener) {
|
|
*aStreamListener = nullptr;
|
|
}
|
|
|
|
nsresult rv = NS_OK;
|
|
if (aStreamListener) {
|
|
// The channel is already open. We need a synchronous stream that
|
|
// implements nsISeekableStream, so we have to find the underlying
|
|
// file and reopen it
|
|
nsCOMPtr<nsIFileChannel> fc(do_QueryInterface(mChannel));
|
|
if (fc) {
|
|
nsCOMPtr<nsIFile> file;
|
|
rv = fc->GetFile(getter_AddRefs(file));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
rv = NS_NewLocalFileInputStream(
|
|
getter_AddRefs(mInput), file, -1, -1, nsIFileInputStream::SHARE_DELETE);
|
|
} else if (IsBlobURI(mURI)) {
|
|
rv = NS_GetStreamForBlobURI(mURI, getter_AddRefs(mInput));
|
|
}
|
|
} else {
|
|
rv = mChannel->Open2(getter_AddRefs(mInput));
|
|
}
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
mSeekable = do_QueryInterface(mInput);
|
|
if (!mSeekable) {
|
|
// XXX The file may just be a .url or similar
|
|
// shortcut that points to a Web site. We need to fix this by
|
|
// doing an async open and waiting until we locate the real resource,
|
|
// then using that (if it's still a file!).
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult FileMediaResource::Close()
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
|
|
|
|
// Since mChennel is only accessed by main thread, there is no necessary to
|
|
// take the lock.
|
|
if (mChannel) {
|
|
mChannel->Cancel(NS_ERROR_PARSED_DATA_CACHED);
|
|
mChannel = nullptr;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
already_AddRefed<nsIPrincipal> FileMediaResource::GetCurrentPrincipal()
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
|
|
|
|
nsCOMPtr<nsIPrincipal> principal;
|
|
nsIScriptSecurityManager* secMan = nsContentUtils::GetSecurityManager();
|
|
if (!secMan || !mChannel)
|
|
return nullptr;
|
|
secMan->GetChannelResultPrincipal(mChannel, getter_AddRefs(principal));
|
|
return principal.forget();
|
|
}
|
|
|
|
bool FileMediaResource::CanClone()
|
|
{
|
|
return true;
|
|
}
|
|
|
|
already_AddRefed<MediaResource> FileMediaResource::CloneData(MediaResourceCallback* aCallback)
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
|
|
|
|
MediaDecoderOwner* owner = mCallback->GetMediaOwner();
|
|
if (!owner) {
|
|
// The decoder is being shut down, so we can't clone
|
|
return nullptr;
|
|
}
|
|
dom::HTMLMediaElement* element = owner->GetMediaElement();
|
|
if (!element) {
|
|
// The decoder is being shut down, so we can't clone
|
|
return nullptr;
|
|
}
|
|
nsCOMPtr<nsILoadGroup> loadGroup = element->GetDocumentLoadGroup();
|
|
NS_ENSURE_TRUE(loadGroup, nullptr);
|
|
|
|
MOZ_ASSERT(element->IsAnyOfHTMLElements(nsGkAtoms::audio, nsGkAtoms::video));
|
|
nsContentPolicyType contentPolicyType = element->IsHTMLElement(nsGkAtoms::audio) ?
|
|
nsIContentPolicy::TYPE_INTERNAL_AUDIO : nsIContentPolicy::TYPE_INTERNAL_VIDEO;
|
|
|
|
nsLoadFlags loadFlags = nsIRequest::LOAD_NORMAL | nsIChannel::LOAD_CLASSIFY_URI;
|
|
|
|
nsCOMPtr<nsIChannel> channel;
|
|
nsresult rv =
|
|
NS_NewChannel(getter_AddRefs(channel),
|
|
mURI,
|
|
element,
|
|
nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_INHERITS,
|
|
contentPolicyType,
|
|
loadGroup,
|
|
nullptr, // aCallbacks
|
|
loadFlags);
|
|
|
|
if (NS_FAILED(rv))
|
|
return nullptr;
|
|
|
|
RefPtr<MediaResource> resource(new FileMediaResource(aCallback, channel, mURI, GetContentType()));
|
|
return resource.forget();
|
|
}
|
|
|
|
nsresult FileMediaResource::ReadFromCache(char* aBuffer, int64_t aOffset, uint32_t aCount)
|
|
{
|
|
MutexAutoLock lock(mLock);
|
|
|
|
EnsureSizeInitialized();
|
|
if (!aCount) {
|
|
return NS_OK;
|
|
}
|
|
int64_t offset = 0;
|
|
nsresult res = mSeekable->Tell(&offset);
|
|
NS_ENSURE_SUCCESS(res,res);
|
|
res = mSeekable->Seek(nsISeekableStream::NS_SEEK_SET, aOffset);
|
|
NS_ENSURE_SUCCESS(res,res);
|
|
uint32_t bytesRead = 0;
|
|
do {
|
|
uint32_t x = 0;
|
|
uint32_t bytesToRead = aCount - bytesRead;
|
|
res = mInput->Read(aBuffer, bytesToRead, &x);
|
|
bytesRead += x;
|
|
if (!x) {
|
|
res = NS_ERROR_FAILURE;
|
|
}
|
|
} while (bytesRead != aCount && res == NS_OK);
|
|
|
|
// Reset read head to original position so we don't disturb any other
|
|
// reading thread.
|
|
nsresult seekres = mSeekable->Seek(nsISeekableStream::NS_SEEK_SET, offset);
|
|
|
|
// If a read failed in the loop above, we want to return its failure code.
|
|
NS_ENSURE_SUCCESS(res,res);
|
|
|
|
// Else we succeed if the reset-seek succeeds.
|
|
return seekres;
|
|
}
|
|
|
|
nsresult FileMediaResource::UnsafeRead(char* aBuffer, uint32_t aCount, uint32_t* aBytes)
|
|
{
|
|
EnsureSizeInitialized();
|
|
return mInput->Read(aBuffer, aCount, aBytes);
|
|
}
|
|
|
|
nsresult FileMediaResource::ReadAt(int64_t aOffset, char* aBuffer,
|
|
uint32_t aCount, uint32_t* aBytes)
|
|
{
|
|
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
|
|
|
|
nsresult rv;
|
|
{
|
|
MutexAutoLock lock(mLock);
|
|
rv = UnsafeSeek(nsISeekableStream::NS_SEEK_SET, aOffset);
|
|
if (NS_FAILED(rv)) return rv;
|
|
rv = UnsafeRead(aBuffer, aCount, aBytes);
|
|
}
|
|
if (NS_SUCCEEDED(rv)) {
|
|
DispatchBytesConsumed(*aBytes, aOffset);
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
already_AddRefed<MediaByteBuffer>
|
|
FileMediaResource::MediaReadAt(int64_t aOffset, uint32_t aCount)
|
|
{
|
|
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
|
|
|
|
MutexAutoLock lock(mLock);
|
|
return UnsafeMediaReadAt(aOffset, aCount);
|
|
}
|
|
|
|
already_AddRefed<MediaByteBuffer>
|
|
FileMediaResource::UnsafeMediaReadAt(int64_t aOffset, uint32_t aCount)
|
|
{
|
|
RefPtr<MediaByteBuffer> bytes = new MediaByteBuffer();
|
|
bool ok = bytes->SetLength(aCount, fallible);
|
|
NS_ENSURE_TRUE(ok, nullptr);
|
|
nsresult rv = UnsafeSeek(nsISeekableStream::NS_SEEK_SET, aOffset);
|
|
NS_ENSURE_SUCCESS(rv, nullptr);
|
|
char* curr = reinterpret_cast<char*>(bytes->Elements());
|
|
const char* start = curr;
|
|
while (aCount > 0) {
|
|
uint32_t bytesRead;
|
|
rv = UnsafeRead(curr, aCount, &bytesRead);
|
|
NS_ENSURE_SUCCESS(rv, nullptr);
|
|
if (!bytesRead) {
|
|
break;
|
|
}
|
|
aCount -= bytesRead;
|
|
curr += bytesRead;
|
|
}
|
|
bytes->SetLength(curr - start);
|
|
return bytes.forget();
|
|
}
|
|
|
|
nsresult FileMediaResource::UnsafeSeek(int32_t aWhence, int64_t aOffset)
|
|
{
|
|
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
|
|
|
|
if (!mSeekable)
|
|
return NS_ERROR_FAILURE;
|
|
EnsureSizeInitialized();
|
|
return mSeekable->Seek(aWhence, aOffset);
|
|
}
|
|
|
|
int64_t FileMediaResource::Tell()
|
|
{
|
|
MutexAutoLock lock(mLock);
|
|
EnsureSizeInitialized();
|
|
|
|
int64_t offset = 0;
|
|
// Return mSize as offset (end of stream) in case of error
|
|
if (!mSeekable || NS_FAILED(mSeekable->Tell(&offset)))
|
|
return mSize;
|
|
return offset;
|
|
}
|
|
|
|
already_AddRefed<MediaResource>
|
|
MediaResource::Create(MediaResourceCallback* aCallback, nsIChannel* aChannel)
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(),
|
|
"MediaResource::Open called on non-main thread");
|
|
|
|
// If the channel was redirected, we want the post-redirect URI;
|
|
// but if the URI scheme was expanded, say from chrome: to jar:file:,
|
|
// we want the original URI.
|
|
nsCOMPtr<nsIURI> uri;
|
|
nsresult rv = NS_GetFinalChannelURI(aChannel, getter_AddRefs(uri));
|
|
NS_ENSURE_SUCCESS(rv, nullptr);
|
|
|
|
nsAutoCString contentTypeString;
|
|
aChannel->GetContentType(contentTypeString);
|
|
Maybe<MediaContainerType> containerType = MakeMediaContainerType(contentTypeString);
|
|
if (!containerType) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsCOMPtr<nsIFileChannel> fc = do_QueryInterface(aChannel);
|
|
RefPtr<MediaResource> resource;
|
|
if (fc || IsBlobURI(uri)) {
|
|
resource = new FileMediaResource(aCallback, aChannel, uri, *containerType);
|
|
} else {
|
|
resource = new ChannelMediaResource(aCallback, aChannel, uri, *containerType);
|
|
}
|
|
return resource.forget();
|
|
}
|
|
|
|
void BaseMediaResource::SetLoadInBackground(bool aLoadInBackground) {
|
|
if (aLoadInBackground == mLoadInBackground) {
|
|
return;
|
|
}
|
|
mLoadInBackground = aLoadInBackground;
|
|
if (!mChannel) {
|
|
// No channel, resource is probably already loaded.
|
|
return;
|
|
}
|
|
|
|
MediaDecoderOwner* owner = mCallback->GetMediaOwner();
|
|
if (!owner) {
|
|
NS_WARNING("Null owner in MediaResource::SetLoadInBackground()");
|
|
return;
|
|
}
|
|
dom::HTMLMediaElement* element = owner->GetMediaElement();
|
|
if (!element) {
|
|
NS_WARNING("Null element in MediaResource::SetLoadInBackground()");
|
|
return;
|
|
}
|
|
|
|
bool isPending = false;
|
|
if (NS_SUCCEEDED(mChannel->IsPending(&isPending)) &&
|
|
isPending) {
|
|
nsLoadFlags loadFlags;
|
|
DebugOnly<nsresult> rv = mChannel->GetLoadFlags(&loadFlags);
|
|
NS_ASSERTION(NS_SUCCEEDED(rv), "GetLoadFlags() failed!");
|
|
|
|
if (aLoadInBackground) {
|
|
loadFlags |= nsIRequest::LOAD_BACKGROUND;
|
|
} else {
|
|
loadFlags &= ~nsIRequest::LOAD_BACKGROUND;
|
|
}
|
|
ModifyLoadFlags(loadFlags);
|
|
}
|
|
}
|
|
|
|
void BaseMediaResource::ModifyLoadFlags(nsLoadFlags aFlags)
|
|
{
|
|
nsCOMPtr<nsILoadGroup> loadGroup;
|
|
nsresult rv = mChannel->GetLoadGroup(getter_AddRefs(loadGroup));
|
|
MOZ_ASSERT(NS_SUCCEEDED(rv), "GetLoadGroup() failed!");
|
|
|
|
nsresult status;
|
|
mChannel->GetStatus(&status);
|
|
|
|
bool inLoadGroup = false;
|
|
if (loadGroup) {
|
|
rv = loadGroup->RemoveRequest(mChannel, nullptr, status);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
inLoadGroup = true;
|
|
}
|
|
}
|
|
|
|
rv = mChannel->SetLoadFlags(aFlags);
|
|
MOZ_ASSERT(NS_SUCCEEDED(rv), "SetLoadFlags() failed!");
|
|
|
|
if (inLoadGroup) {
|
|
rv = loadGroup->AddRequest(mChannel, nullptr);
|
|
MOZ_ASSERT(NS_SUCCEEDED(rv), "AddRequest() failed!");
|
|
}
|
|
}
|
|
|
|
void BaseMediaResource::DispatchBytesConsumed(int64_t aNumBytes, int64_t aOffset)
|
|
{
|
|
if (aNumBytes <= 0) {
|
|
return;
|
|
}
|
|
mCallback->NotifyBytesConsumed(aNumBytes, aOffset);
|
|
}
|
|
|
|
nsresult
|
|
MediaResourceIndex::Read(char* aBuffer, uint32_t aCount, uint32_t* aBytes)
|
|
{
|
|
NS_ASSERTION(!NS_IsMainThread(), "Don't call on main thread");
|
|
|
|
// We purposefuly don't check that we may attempt to read past
|
|
// mResource->GetLength() as the resource's length may change over time.
|
|
|
|
nsresult rv = ReadAt(mOffset, aBuffer, aCount, aBytes);
|
|
if (NS_FAILED(rv)) {
|
|
return rv;
|
|
}
|
|
mOffset += *aBytes;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
MediaResourceIndex::ReadAt(int64_t aOffset, char* aBuffer,
|
|
uint32_t aCount, uint32_t* aBytes) const
|
|
{
|
|
*aBytes = 0;
|
|
while (aCount > 0) {
|
|
uint32_t bytesRead = 0;
|
|
nsresult rv = mResource->ReadAt(aOffset, aBuffer, aCount, &bytesRead);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (!bytesRead) {
|
|
break;
|
|
}
|
|
*aBytes += bytesRead;
|
|
aOffset += bytesRead;
|
|
aBuffer += bytesRead;
|
|
aCount -= bytesRead;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
MediaResourceIndex::Seek(int32_t aWhence, int64_t aOffset)
|
|
{
|
|
switch (aWhence) {
|
|
case SEEK_SET:
|
|
break;
|
|
case SEEK_CUR:
|
|
aOffset += mOffset;
|
|
break;
|
|
case SEEK_END:
|
|
{
|
|
int64_t length = mResource->GetLength();
|
|
if (length == -1 || length - aOffset < 0) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
aOffset = mResource->GetLength() - aOffset;
|
|
}
|
|
break;
|
|
default:
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
mOffset = aOffset;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
} // namespace mozilla
|
|
|