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();
}
}
}
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;
}
bool
WMFReader::InitializeDXVA()
{
if (!gfxPlatform::GetPlatform()->CanUseHardwareVideoDecoding()) {
return false;
}
MOZ_ASSERT(mDecoder->GetImageContainer());
// Extract the layer manager backend type so that we can determine
// whether it's worthwhile using DXVA. If we're not running with a D3D
// layer manager then the readback of decoded video frames from GPU to
// CPU memory grinds painting to a halt, and makes playback performance
// *worse*.
MediaDecoderOwner* owner = mDecoder->GetOwner();
NS_ENSURE_TRUE(owner, false);
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE(element, false);
nsRefPtr<LayerManager> layerManager =
nsContentUtils::LayerManagerForDocument(element->OwnerDoc());
NS_ENSURE_TRUE(layerManager, false);
LayersBackend backend = layerManager->GetCompositorBackendType();
if (backend != LayersBackend::LAYERS_D3D9 &&
backend != LayersBackend::LAYERS_D3D10 &&
backend != LayersBackend::LAYERS_D3D11) {
return false;
}
mDXVA2Manager = DXVA2Manager::CreateD3D9DXVA();
return mDXVA2Manager != nullptr;
}
void
MP4Reader::InitLayersBackendType()
{
if (!IsVideoContentType(mDecoder->GetResource()->GetContentType())) {
// Not playing video, we don't care about the layers backend type.
return;
}
// Extract the layer manager backend type so that platform decoders
// can determine whether it's worthwhile using hardware accelerated
// video decoding.
MediaDecoderOwner* owner = mDecoder->GetOwner();
if (!owner) {
NS_WARNING("MP4Reader without a decoder owner, can't get HWAccel");
return;
}
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE_VOID(element);
nsRefPtr<LayerManager> layerManager =
nsContentUtils::LayerManagerForDocument(element->OwnerDoc());
NS_ENSURE_TRUE_VOID(layerManager);
mLayersBackendType = layerManager->GetCompositorBackendType();
}
bool
WMFReader::InitializeDXVA()
{
if (!Preferences::GetBool("media.windows-media-foundation.use-dxva", false)) {
return false;
}
MOZ_ASSERT(mDecoder->GetImageContainer());
// Extract the layer manager backend type so that we can determine
// whether it's worthwhile using DXVA. If we're not running with a D3D
// layer manager then the readback of decoded video frames from GPU to
// CPU memory grinds painting to a halt, and makes playback performance
// *worse*.
MediaDecoderOwner* owner = mDecoder->GetOwner();
NS_ENSURE_TRUE(owner, false);
HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE(element, false);
nsRefPtr<LayerManager> layerManager =
nsContentUtils::LayerManagerForDocument(element->OwnerDoc());
NS_ENSURE_TRUE(layerManager, false);
if (layerManager->GetBackendType() != LayersBackend::LAYERS_D3D9 &&
layerManager->GetBackendType() != LayersBackend::LAYERS_D3D10) {
return false;
}
mDXVA2Manager = DXVA2Manager::Create();
return mDXVA2Manager != nullptr;
}
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.
NS_ASSERTION(!GetContentType().IsEmpty(),
"When recreating a channel, we should know the Content-Type.");
mChannel->SetContentType(GetContentType());
mSuspendAgent.NotifyChannelOpened(mChannel);
// Tell the cache to reset the download status when the channel is reopened.
mCacheStream.NotifyChannelRecreated();
return rv;
}
void RtspMediaResource::Suspend(bool aCloseImmediately)
{
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
MediaDecoderOwner* owner = mDecoder->GetMediaOwner();
NS_ENSURE_TRUE_VOID(owner);
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE_VOID(element);
mMediaStreamController->Suspend();
element->DownloadSuspended();
}
void RtspMediaResource::Resume()
{
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
MediaDecoderOwner* owner = mDecoder->GetMediaOwner();
NS_ENSURE_TRUE_VOID(owner);
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE_VOID(element);
if (mChannel) {
element->DownloadResumed();
}
mMediaStreamController->Resume();
}
void ChannelMediaResource::Resume()
{
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
NS_ASSERTION(mSuspendCount > 0, "Too many resumes!");
MediaDecoderOwner* owner = mDecoder->GetMediaOwner();
if (!owner) {
// Shutting down; do nothing.
return;
}
dom::HTMLMediaElement* element = owner->GetMediaElement();
if (!element) {
// Shutting down; do nothing.
return;
}
NS_ASSERTION(mSuspendCount > 0, "Resume without previous Suspend!");
--mSuspendCount;
if (mSuspendCount == 0) {
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;
PossiblyResume();
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();
}
}
}
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;
}
void RtspMediaResource::Suspend(bool aCloseImmediately)
{
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
mIsSuspend = true;
if (NS_WARN_IF(!mDecoder)) {
return;
}
MediaDecoderOwner* owner = mDecoder->GetMediaOwner();
NS_ENSURE_TRUE_VOID(owner);
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE_VOID(element);
mMediaStreamController->Suspend();
element->DownloadSuspended();
mDecoder->NotifySuspendedStatusChanged();
}
void
MediaDecoder::NotifyOwnerActivityChanged(bool aIsVisible)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_DIAGNOSTIC_ASSERT(!IsShutdown());
SetElementVisibility(aIsVisible);
MediaDecoderOwner* owner = GetOwner();
NS_ENSURE_TRUE_VOID(owner);
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE_VOID(element);
RefPtr<LayerManager> layerManager =
nsContentUtils::LayerManagerForDocument(element->OwnerDoc());
NS_ENSURE_TRUE_VOID(layerManager);
RefPtr<KnowsCompositor> knowsCompositor = layerManager->AsShadowForwarder();
mCompositorUpdatedEvent.Notify(knowsCompositor);
}
void RtspMediaResource::Resume()
{
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
mIsSuspend = false;
if (NS_WARN_IF(!mDecoder)) {
return;
}
MediaDecoderOwner* owner = mDecoder->GetMediaOwner();
NS_ENSURE_TRUE_VOID(owner);
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE_VOID(element);
if (mChannel) {
element->DownloadResumed();
}
mMediaStreamController->Resume();
mDecoder->NotifySuspendedStatusChanged();
}
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
ChannelMediaResource::RecreateChannel()
{
nsLoadFlags loadFlags =
nsICachingChannel::LOAD_BYPASS_LOCAL_CACHE_IF_BUSY |
(mLoadInBackground ? nsIRequest::LOAD_BACKGROUND : 0);
MediaDecoderOwner* owner = mDecoder->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);
nsCOMPtr<nsIChannel> channel;
nsresult rv = NS_NewChannel(getter_AddRefs(channel),
mURI,
nullptr,
loadGroup,
nullptr,
loadFlags);
mChannel = new nsMainThreadPtrHolder<nsIChannel>(channel);
// 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.
NS_ASSERTION(!GetContentType().IsEmpty(),
"When recreating a channel, we should know the Content-Type.");
mChannel->SetContentType(GetContentType());
return rv;
}
void 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 |mByteRange| for a specific chunk, or |mOffset| if seeking in a
// complete file download.
nsAutoCString rangeString("bytes=");
if (!mByteRange.IsNull()) {
rangeString.AppendInt(mByteRange.mStart);
mOffset = mByteRange.mStart;
} else {
rangeString.AppendInt(mOffset);
}
rangeString.Append("-");
if (!mByteRange.IsNull()) {
rangeString.AppendInt(mByteRange.mEnd);
}
hc->SetRequestHeader(NS_LITERAL_CSTRING("Range"), rangeString, false);
// Send Accept header for video and audio types only (Bug 489071)
NS_ASSERTION(NS_IsMainThread(), "Don't call on non-main thread");
MediaDecoderOwner* owner = mDecoder->GetMediaOwner();
if (!owner) {
return;
}
dom::HTMLMediaElement* element = owner->GetMediaElement();
if (!element) {
return;
}
element->SetRequestHeaders(hc);
} else {
NS_ASSERTION(mOffset == 0, "Don't know how to seek on this channel type");
}
}
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);
}
}
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;
}
if (mByteRange.IsNull()) {
// We're not making a byte range request, so 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);
NS_ENSURE_TRUE(mListener, NS_ERROR_OUT_OF_MEMORY);
if (aStreamListener) {
*aStreamListener = mListener;
NS_ADDREF(*aStreamListener);
} else {
mChannel->SetNotificationCallbacks(mListener.get());
nsCOMPtr<nsIStreamListener> listener = mListener.get();
// Ensure that if we're loading cross domain, that the server is sending
// an authorizing Access-Control header.
MediaDecoderOwner* owner = mDecoder->GetMediaOwner();
NS_ENSURE_TRUE(owner, NS_ERROR_FAILURE);
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE(element, NS_ERROR_FAILURE);
if (element->ShouldCheckAllowOrigin()) {
nsRefPtr<nsCORSListenerProxy> crossSiteListener =
new nsCORSListenerProxy(mListener,
element->NodePrincipal(),
false);
nsresult rv = crossSiteListener->Init(mChannel);
listener = crossSiteListener;
NS_ENSURE_TRUE(crossSiteListener, NS_ERROR_OUT_OF_MEMORY);
NS_ENSURE_SUCCESS(rv, rv);
} else {
nsresult rv = nsContentUtils::GetSecurityManager()->
CheckLoadURIWithPrincipal(element->NodePrincipal(),
mURI,
nsIScriptSecurityManager::STANDARD);
NS_ENSURE_SUCCESS(rv, rv);
}
SetupChannelHeaders();
nsresult rv = mChannel->AsyncOpen(listener, nullptr);
NS_ENSURE_SUCCESS(rv, rv);
// Tell the media element that we are fetching data from a channel.
element->DownloadResumed(true);
}
return NS_OK;
}
nsresult
RtspMediaResource::OnConnected(uint8_t aTrackIdx,
nsIStreamingProtocolMetaData *meta)
{
if (mIsConnected) {
for (uint32_t i = 0 ; i < mTrackBuffer.Length(); ++i) {
mTrackBuffer[i]->Start();
}
return NS_OK;
}
uint8_t tracks;
mMediaStreamController->GetTotalTracks(&tracks);
// If the preference of RTSP video feature is not enabled and the streaming is
// video, we give up moving forward.
if (!IsVideoEnabled() && IsVideo(tracks, meta)) {
// Give up, report error to media element.
nsCOMPtr<nsIRunnable> event =
NS_NewRunnableMethod(mDecoder, &MediaDecoder::DecodeError);
NS_DispatchToMainThread(event);
return NS_ERROR_FAILURE;
}
uint64_t duration = 0;
for (int i = 0; i < tracks; ++i) {
nsCString rtspTrackId("RtspTrack");
rtspTrackId.AppendInt(i);
nsCOMPtr<nsIStreamingProtocolMetaData> trackMeta;
mMediaStreamController->GetTrackMetaData(i, getter_AddRefs(trackMeta));
MOZ_ASSERT(trackMeta);
trackMeta->GetDuration(&duration);
// Here is a heuristic to estimate the slot size.
// For video track, calculate the width*height.
// For audio track, use the BUFFER_SLOT_DEFAULT_SIZE because the w*h is 0.
// Finally clamp them into (BUFFER_SLOT_DEFAULT_SIZE,BUFFER_SLOT_MAX_SIZE)
uint32_t w, h;
uint32_t slotSize;
trackMeta->GetWidth(&w);
trackMeta->GetHeight(&h);
slotSize = clamped((int32_t)(w * h), BUFFER_SLOT_DEFAULT_SIZE,
BUFFER_SLOT_MAX_SIZE);
mTrackBuffer.AppendElement(new RtspTrackBuffer(rtspTrackId.get(),
i, slotSize));
mTrackBuffer[i]->Start();
}
if (!mDecoder) {
return NS_ERROR_FAILURE;
}
// If the duration is 0, imply the stream is live stream.
if (duration) {
// Not live stream.
mRealTime = false;
mDecoder->SetInfinite(false);
mDecoder->SetDuration(duration);
} else {
// Live stream.
// Check the preference "media.realtime_decoder.enabled".
if (!Preferences::GetBool("media.realtime_decoder.enabled", false)) {
// Give up, report error to media element.
nsCOMPtr<nsIRunnable> event =
NS_NewRunnableMethod(mDecoder, &MediaDecoder::DecodeError);
NS_DispatchToMainThread(event);
return NS_ERROR_FAILURE;
} else {
mRealTime = true;
bool seekable = false;
mDecoder->SetInfinite(true);
mDecoder->SetMediaSeekable(seekable);
}
}
// Fires an initial progress event and sets up the stall counter so stall events
// fire if no download occurs within the required time frame.
mDecoder->Progress(false);
MediaDecoderOwner* owner = mDecoder->GetMediaOwner();
NS_ENSURE_TRUE(owner, NS_ERROR_FAILURE);
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE(element, NS_ERROR_FAILURE);
element->FinishDecoderSetup(mDecoder, this);
mIsConnected = true;
return NS_OK;
}
nsresult
ChannelMediaResource::OnStartRequest(nsIRequest* aRequest)
{
NS_ASSERTION(mChannel.get() == aRequest, "Wrong channel!");
MediaDecoderOwner* owner = mDecoder->GetMediaOwner();
NS_ENSURE_TRUE(owner, NS_ERROR_FAILURE);
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE(element, NS_ERROR_FAILURE);
nsresult status;
nsresult rv = aRequest->GetStatus(&status);
NS_ENSURE_SUCCESS(rv, rv);
if (element->ShouldCheckAllowOrigin()) {
// If the request was cancelled by nsCORSListenerProxy due to failing
// the CORS security check, send an error through to the media element.
if (status == NS_ERROR_DOM_BAD_URI) {
mDecoder->NetworkError();
return NS_ERROR_DOM_BAD_URI;
}
}
nsCOMPtr<nsIHttpChannel> hc = do_QueryInterface(aRequest);
bool seekable = false;
if (hc) {
uint32_t responseStatus = 0;
hc->GetResponseStatus(&responseStatus);
bool succeeded = false;
hc->GetRequestSucceeded(&succeeded);
if (!succeeded && NS_SUCCEEDED(status)) {
// HTTP-level error (e.g. 4xx); treat this as a fatal network-level error.
// We might get this on a seek.
// (Note that lower-level errors indicated by NS_FAILED(status) are
// handled in OnStopRequest.)
// A 416 error should treated as EOF here... it's possible
// that we don't get Content-Length, we read N bytes, then we
// suspend and resume, the resume reopens the channel and we seek to
// offset N, but there are no more bytes, so we get a 416
// "Requested Range Not Satisfiable".
if (responseStatus == HTTP_REQUESTED_RANGE_NOT_SATISFIABLE_CODE) {
// OnStopRequest will not be fired, so we need to do some of its
// work here.
mCacheStream.NotifyDataEnded(status);
} else {
mDecoder->NetworkError();
}
// This disconnects our listener so we don't get any more data. We
// certainly don't want an error page to end up in our cache!
CloseChannel();
return NS_OK;
}
nsAutoCString ranges;
hc->GetResponseHeader(NS_LITERAL_CSTRING("Accept-Ranges"),
ranges);
bool acceptsRanges = ranges.EqualsLiteral("bytes");
// True if this channel will not return an unbounded amount of data
bool dataIsBounded = false;
int64_t contentLength = -1;
hc->GetContentLength(&contentLength);
if (contentLength >= 0 && responseStatus == HTTP_OK_CODE) {
// "OK" status means Content-Length is for the whole resource.
// Since that's bounded, we know we have a finite-length resource.
dataIsBounded = true;
}
if (mOffset == 0) {
// Look for duration headers from known Ogg content systems.
// In the case of multiple options for obtaining the duration
// the order of precedence is:
// 1) The Media resource metadata if possible (done by the decoder itself).
// 2) Content-Duration message header.
// 3) X-AMZ-Meta-Content-Duration.
// 4) X-Content-Duration.
// 5) Perform a seek in the decoder to find the value.
nsAutoCString durationText;
nsresult ec = NS_OK;
rv = hc->GetResponseHeader(NS_LITERAL_CSTRING("Content-Duration"), durationText);
if (NS_FAILED(rv)) {
rv = hc->GetResponseHeader(NS_LITERAL_CSTRING("X-AMZ-Meta-Content-Duration"), durationText);
}
if (NS_FAILED(rv)) {
rv = hc->GetResponseHeader(NS_LITERAL_CSTRING("X-Content-Duration"), durationText);
}
// If there is a Content-Duration header with a valid value, record
// the duration.
if (NS_SUCCEEDED(rv)) {
double duration = durationText.ToDouble(&ec);
if (ec == NS_OK && duration >= 0) {
mDecoder->SetDuration(duration);
// We know the resource must be bounded.
dataIsBounded = true;
}
}
}
// Assume Range requests have a bounded upper limit unless the
// Content-Range header tells us otherwise.
bool boundedSeekLimit = true;
// Check response code for byte-range requests (seeking, chunk requests).
if (!mByteRange.IsNull() && (responseStatus == HTTP_PARTIAL_RESPONSE_CODE)) {
// Parse Content-Range header.
int64_t rangeStart = 0;
int64_t rangeEnd = 0;
int64_t rangeTotal = 0;
rv = ParseContentRangeHeader(hc, rangeStart, rangeEnd, rangeTotal);
if (NS_FAILED(rv)) {
// Content-Range header text should be parse-able.
CMLOG("Error processing \'Content-Range' for "
"HTTP_PARTIAL_RESPONSE_CODE: rv[%x] channel[%p] decoder[%p]",
rv, hc.get(), mDecoder);
mDecoder->NetworkError();
CloseChannel();
return NS_OK;
}
// Give some warnings if the ranges are unexpected.
// XXX These could be error conditions.
NS_WARN_IF_FALSE(mByteRange.mStart == rangeStart,
"response range start does not match request");
NS_WARN_IF_FALSE(mOffset == rangeStart,
"response range start does not match current offset");
NS_WARN_IF_FALSE(mByteRange.mEnd == rangeEnd,
"response range end does not match request");
// Notify media cache about the length and start offset of data received.
// Note: If aRangeTotal == -1, then the total bytes is unknown at this stage.
// For now, tell the decoder that the stream is infinite.
if (rangeTotal == -1) {
boundedSeekLimit = false;
} else {
mCacheStream.NotifyDataLength(rangeTotal);
}
mCacheStream.NotifyDataStarted(rangeStart);
mOffset = rangeStart;
// We received 'Content-Range', so the server accepts range requests.
acceptsRanges = true;
} else if (((mOffset > 0) || !mByteRange.IsNull())
&& (responseStatus == HTTP_OK_CODE)) {
// If we get an OK response but we were seeking, or requesting a byte
// range, then we have to assume that seeking doesn't work. We also need
// to tell the cache that it's getting data for the start of the stream.
mCacheStream.NotifyDataStarted(0);
mOffset = 0;
// The server claimed it supported range requests. It lied.
acceptsRanges = false;
} else if (mOffset == 0 &&
(responseStatus == HTTP_OK_CODE ||
responseStatus == HTTP_PARTIAL_RESPONSE_CODE)) {
if (contentLength >= 0) {
mCacheStream.NotifyDataLength(contentLength);
}
}
// XXX we probably should examine the Content-Range header in case
// the server gave us a range which is not quite what we asked for
// If we get an HTTP_OK_CODE response to our byte range request,
// and the server isn't sending Accept-Ranges:bytes then we don't
// support seeking.
seekable =
responseStatus == HTTP_PARTIAL_RESPONSE_CODE || acceptsRanges;
if (seekable && boundedSeekLimit) {
// If range requests are supported, and we did not see an unbounded
// upper range limit, we assume the resource is bounded.
dataIsBounded = true;
}
mDecoder->SetInfinite(!dataIsBounded);
}
mDecoder->SetTransportSeekable(seekable);
mCacheStream.SetTransportSeekable(seekable);
{
MutexAutoLock lock(mLock);
mIsTransportSeekable = seekable;
mChannelStatistics->Start();
}
mReopenOnError = false;
// If we are seeking to get metadata, because we are playing an OGG file,
// ignore if the channel gets closed without us suspending it explicitly. We
// don't want to tell the element that the download has finished whereas we
// just happended to have reached the end of the media while seeking.
mIgnoreClose = mSeekingForMetadata;
if (mSuspendCount > 0) {
// Re-suspend the channel if it needs to be suspended
// No need to call PossiblySuspend here since the channel is
// definitely in the right state for us in OnStartRequest.
mChannel->Suspend();
mIgnoreResume = false;
}
// Fires an initial progress event and sets up the stall counter so stall events
// fire if no download occurs within the required time frame.
mDecoder->Progress(false);
return NS_OK;
}
nsresult
ChannelMediaResource::OnStartRequest(nsIRequest* aRequest)
{
NS_ASSERTION(mChannel.get() == aRequest, "Wrong channel!");
MediaDecoderOwner* owner = mCallback->GetMediaOwner();
NS_ENSURE_TRUE(owner, NS_ERROR_FAILURE);
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE(element, NS_ERROR_FAILURE);
nsresult status;
nsresult rv = aRequest->GetStatus(&status);
NS_ENSURE_SUCCESS(rv, rv);
if (status == NS_BINDING_ABORTED) {
// Request was aborted before we had a chance to receive any data, or
// even an OnStartRequest(). Close the channel. This is important, as
// we don't want to mess up our state, as if we're cloned that would
// cause the clone to copy incorrect metadata (like whether we're
// infinite for example).
CloseChannel();
return status;
}
if (element->ShouldCheckAllowOrigin()) {
// If the request was cancelled by nsCORSListenerProxy due to failing
// the CORS security check, send an error through to the media element.
if (status == NS_ERROR_DOM_BAD_URI) {
mCallback->NotifyNetworkError();
return NS_ERROR_DOM_BAD_URI;
}
}
nsCOMPtr<nsIHttpChannel> hc = do_QueryInterface(aRequest);
bool seekable = false;
if (hc) {
uint32_t responseStatus = 0;
hc->GetResponseStatus(&responseStatus);
bool succeeded = false;
hc->GetRequestSucceeded(&succeeded);
if (!succeeded && NS_SUCCEEDED(status)) {
// HTTP-level error (e.g. 4xx); treat this as a fatal network-level error.
// We might get this on a seek.
// (Note that lower-level errors indicated by NS_FAILED(status) are
// handled in OnStopRequest.)
// A 416 error should treated as EOF here... it's possible
// that we don't get Content-Length, we read N bytes, then we
// suspend and resume, the resume reopens the channel and we seek to
// offset N, but there are no more bytes, so we get a 416
// "Requested Range Not Satisfiable".
if (responseStatus == HTTP_REQUESTED_RANGE_NOT_SATISFIABLE_CODE) {
// OnStopRequest will not be fired, so we need to do some of its
// work here.
mCacheStream.NotifyDataEnded(status);
} else {
mCallback->NotifyNetworkError();
}
// This disconnects our listener so we don't get any more data. We
// certainly don't want an error page to end up in our cache!
CloseChannel();
return NS_OK;
}
nsAutoCString ranges;
hc->GetResponseHeader(NS_LITERAL_CSTRING("Accept-Ranges"),
ranges);
bool acceptsRanges = ranges.EqualsLiteral("bytes");
// True if this channel will not return an unbounded amount of data
bool dataIsBounded = false;
int64_t contentLength = -1;
hc->GetContentLength(&contentLength);
if (contentLength >= 0 && responseStatus == HTTP_OK_CODE) {
// "OK" status means Content-Length is for the whole resource.
// Since that's bounded, we know we have a finite-length resource.
dataIsBounded = true;
}
// Assume Range requests have a bounded upper limit unless the
// Content-Range header tells us otherwise.
bool boundedSeekLimit = true;
// Check response code for byte-range requests (seeking, chunk requests).
if (responseStatus == HTTP_PARTIAL_RESPONSE_CODE) {
// Parse Content-Range header.
int64_t rangeStart = 0;
int64_t rangeEnd = 0;
int64_t rangeTotal = 0;
rv = ParseContentRangeHeader(hc, rangeStart, rangeEnd, rangeTotal);
// We received 'Content-Range', so the server accepts range requests.
bool gotRangeHeader = NS_SUCCEEDED(rv);
if (gotRangeHeader) {
// We received 'Content-Range', so the server accepts range requests.
// Notify media cache about the length and start offset of data received.
// Note: If aRangeTotal == -1, then the total bytes is unknown at this stage.
// For now, tell the decoder that the stream is infinite.
if (rangeTotal == -1) {
boundedSeekLimit = false;
} else {
contentLength = std::max(contentLength, rangeTotal);
}
// Give some warnings if the ranges are unexpected.
// XXX These could be error conditions.
NS_WARN_IF_FALSE(mOffset == rangeStart,
"response range start does not match current offset");
mOffset = rangeStart;
mCacheStream.NotifyDataStarted(rangeStart);
}
acceptsRanges = gotRangeHeader;
} else if (mOffset > 0 && responseStatus == HTTP_OK_CODE) {
// If we get an OK response but we were seeking, or requesting a byte
// range, then we have to assume that seeking doesn't work. We also need
// to tell the cache that it's getting data for the start of the stream.
mCacheStream.NotifyDataStarted(0);
mOffset = 0;
// The server claimed it supported range requests. It lied.
acceptsRanges = false;
}
if (mOffset == 0 && contentLength >= 0 &&
(responseStatus == HTTP_OK_CODE ||
responseStatus == HTTP_PARTIAL_RESPONSE_CODE)) {
mCacheStream.NotifyDataLength(contentLength);
}
// XXX we probably should examine the Content-Range header in case
// the server gave us a range which is not quite what we asked for
// If we get an HTTP_OK_CODE response to our byte range request,
// and the server isn't sending Accept-Ranges:bytes then we don't
// support seeking.
seekable = acceptsRanges;
if (seekable && boundedSeekLimit) {
// If range requests are supported, and we did not see an unbounded
// upper range limit, we assume the resource is bounded.
dataIsBounded = true;
}
mCallback->SetInfinite(!dataIsBounded);
}
mCacheStream.SetTransportSeekable(seekable);
{
MutexAutoLock lock(mLock);
mIsTransportSeekable = seekable;
mChannelStatistics->Start();
}
mReopenOnError = false;
mIgnoreClose = false;
mSuspendAgent.UpdateSuspendedStatusIfNeeded();
// Fires an initial progress event.
owner->DownloadProgressed();
return NS_OK;
}