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/* 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 "FileMediaResource.h"
#include "mozilla/AbstractThread.h"
#include "mozilla/dom/BlobImpl.h"
#include "mozilla/dom/BlobURLProtocolHandler.h"
#include "nsContentUtils.h"
#include "nsIFile.h"
#include "nsIFileChannel.h"
#include "nsIFileStreams.h"
#include "nsITimedChannel.h"
#include "nsNetUtil.h"
namespace mozilla {
void FileMediaResource::EnsureSizeInitialized() {
mLock.AssertCurrentThreadOwns();
NS_ASSERTION(mInput, "Must have file input stream");
if (mSizeInitialized && mNotifyDataEndedProcessed) {
return;
}
if (!mSizeInitialized) {
// 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;
}
}
mSizeInitialized = true;
if (!mNotifyDataEndedProcessed && mSize >= 0) {
mCallback->AbstractMainThread()->Dispatch(NewRunnableMethod<nsresult>(
"MediaResourceCallback::NotifyDataEnded", mCallback.get(),
&MediaResourceCallback::NotifyDataEnded, NS_OK));
}
mNotifyDataEndedProcessed = true;
}
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");
MOZ_ASSERT(aStreamListener);
*aStreamListener = nullptr;
nsresult rv = NS_OK;
MutexAutoLock lock(mLock);
// 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);
NS_ENSURE_SUCCESS(rv, rv);
} else if (dom::IsBlobURI(mURI)) {
RefPtr<dom::BlobImpl> blobImpl;
rv = NS_GetBlobForBlobURI(mURI, getter_AddRefs(blobImpl));
NS_ENSURE_SUCCESS(rv, rv);
MOZ_ASSERT(blobImpl);
ErrorResult err;
blobImpl->CreateInputStream(getter_AddRefs(mInput), err);
if (NS_WARN_IF(err.Failed())) {
return err.StealNSResult();
}
}
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;
}
RefPtr<GenericPromise> 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 GenericPromise::CreateAndResolve(true, __func__);
}
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::HadCrossOriginRedirects() {
MOZ_ASSERT(NS_IsMainThread());
nsCOMPtr<nsITimedChannel> timedChannel = do_QueryInterface(mChannel);
if (!timedChannel) {
return false;
}
bool allRedirectsSameOrigin = false;
return NS_SUCCEEDED(timedChannel->GetAllRedirectsSameOrigin(
&allRedirectsSameOrigin)) &&
!allRedirectsSameOrigin;
}
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);
}
return rv;
}
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);
}
} // namespace mozilla
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