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;
}
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 durationUs = 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(&durationUs);
// 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 durationUs is 0, imply the stream is live stream.
if (durationUs) {
// Not live stream.
mIsLiveStream = false;
mDecoder->SetInfinite(false);
mDecoder->SetDuration((double)(durationUs) / USECS_PER_S);
} 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 {
mIsLiveStream = true;
bool seekable = false;
mDecoder->SetInfinite(true);
mDecoder->SetMediaSeekable(seekable);
}
}
MediaDecoderOwner* owner = mDecoder->GetMediaOwner();
NS_ENSURE_TRUE(owner, NS_ERROR_FAILURE);
// Fires an initial progress event.
owner->DownloadProgressed();
dom::HTMLMediaElement* element = owner->GetMediaElement();
NS_ENSURE_TRUE(element, NS_ERROR_FAILURE);
element->FinishDecoderSetup(mDecoder, this);
mIsConnected = true;
return NS_OK;
}
