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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 */
#include "BaseMediaResource.h"
#include "ChannelMediaResource.h"
#include "CloneableWithRangeMediaResource.h"
#include "FileMediaResource.h"
#include "MediaContainerType.h"
#include "mozilla/dom/BlobImpl.h"
#include "mozilla/dom/BlobURLProtocolHandler.h"
#include "mozilla/dom/HTMLMediaElement.h"
#include "mozilla/InputStreamLengthHelper.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsICloneableInputStream.h"
#include "nsIFile.h"
#include "nsIFileChannel.h"
#include "nsIInputStream.h"
#include "nsNetUtil.h"
namespace mozilla {
already_AddRefed<BaseMediaResource> BaseMediaResource::Create(
MediaResourceCallback* aCallback, nsIChannel* aChannel,
bool aIsPrivateBrowsing) {
"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;
Maybe<MediaContainerType> containerType =
if (!containerType) {
return nullptr;
// Let's try to create a FileMediaResource in case the channel is a nsIFile
nsCOMPtr<nsIFileChannel> fc = do_QueryInterface(aChannel);
if (fc) {
RefPtr<BaseMediaResource> resource =
new FileMediaResource(aCallback, aChannel, uri);
return resource.forget();
int64_t streamLength = -1;
RefPtr<mozilla::dom::BlobImpl> blobImpl;
if (dom::IsBlobURI(uri) &&
NS_SUCCEEDED(NS_GetBlobForBlobURI(uri, getter_AddRefs(blobImpl))) &&
blobImpl) {
IgnoredErrorResult rv;
nsCOMPtr<nsIInputStream> stream;
blobImpl->CreateInputStream(getter_AddRefs(stream), rv);
if (NS_WARN_IF(rv.Failed())) {
return nullptr;
// If this stream knows its own size synchronously, we can still use
// FileMediaResource. If the size is known, it means that the reading
// doesn't require any async operation. This is required because
// FileMediaResource doesn't work with nsIAsyncInputStreams.
int64_t length;
if (InputStreamLengthHelper::GetSyncLength(stream, &length) &&
length >= 0) {
RefPtr<BaseMediaResource> resource =
new FileMediaResource(aCallback, aChannel, uri, length);
return resource.forget();
// Also if the stream doesn't know its own size synchronously, we can still
// read the length from the blob.
uint64_t size = blobImpl->GetSize(rv);
if (NS_WARN_IF(rv.Failed())) {
return nullptr;
// Maybe this blob URL can be cloned with a range.
nsCOMPtr<nsICloneableInputStreamWithRange> cloneableWithRange =
if (cloneableWithRange) {
RefPtr<BaseMediaResource> resource = new CloneableWithRangeMediaResource(
aCallback, aChannel, uri, stream, size);
return resource.forget();
// We know the size of the stream for blobURLs, let's use it.
streamLength = size;
RefPtr<BaseMediaResource> resource = new ChannelMediaResource(
aCallback, aChannel, uri, streamLength, aIsPrivateBrowsing);
return resource.forget();
void BaseMediaResource::SetLoadInBackground(bool aLoadInBackground) {
if (aLoadInBackground == mLoadInBackground) {
mLoadInBackground = aLoadInBackground;
if (!mChannel) {
// No channel, resource is probably already loaded.
MediaDecoderOwner* owner = mCallback->GetMediaOwner();
if (!owner) {
NS_WARNING("Null owner in MediaResource::SetLoadInBackground()");
RefPtr<dom::HTMLMediaElement> element = owner->GetMediaElement();
if (!element) {
NS_WARNING("Null element in MediaResource::SetLoadInBackground()");
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;
Unused << NS_WARN_IF(NS_FAILED(ModifyLoadFlags(loadFlags)));
nsresult BaseMediaResource::ModifyLoadFlags(nsLoadFlags aFlags) {
nsCOMPtr<nsILoadGroup> loadGroup;
nsresult rv = mChannel->GetLoadGroup(getter_AddRefs(loadGroup));
MOZ_ASSERT(NS_SUCCEEDED(rv), "GetLoadGroup() failed!");
bool inLoadGroup = false;
if (loadGroup) {
nsresult status;
rv = loadGroup->RemoveRequest(mChannel, nullptr, status);
if (NS_WARN_IF(NS_FAILED(rv))) {
return 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!");
return NS_OK;
} // namespace mozilla