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gecko-dev/dom/media/mediasource/SourceBuffer.cpp

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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 http://mozilla.org/MPL/2.0/. */
#include "SourceBuffer.h"
#include "AsyncEventRunner.h"
#include "MediaData.h"
#include "MediaSourceDemuxer.h"
#include "MediaSourceUtils.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/MediaSourceBinding.h"
#include "mozilla/dom/TimeRanges.h"
#include "nsError.h"
#include "nsIEventTarget.h"
#include "nsIRunnable.h"
#include "nsThreadUtils.h"
#include "mozilla/Logging.h"
#include <time.h>
#include "TimeUnits.h"
// GetCurrentTime is defined in winbase.h as zero argument macro forwarding to
// GetTickCount() and conflicts with MediaDecoder::GetCurrentTime implementation.
#ifdef GetCurrentTime
#undef GetCurrentTime
#endif
struct JSContext;
class JSObject;
extern mozilla::LogModule* GetMediaSourceLog();
extern mozilla::LogModule* GetMediaSourceAPILog();
#define MSE_DEBUG(arg, ...) \
DDMOZ_LOG(GetMediaSourceLog(), \
mozilla::LogLevel::Debug, \
"(%s)::%s: " arg, \
mType.OriginalString().Data(), \
__func__, \
##__VA_ARGS__)
#define MSE_DEBUGV(arg, ...) \
DDMOZ_LOG(GetMediaSourceLog(), \
mozilla::LogLevel::Verbose, \
"(%s)::%s: " arg, \
mType.OriginalString().Data(), \
__func__, \
##__VA_ARGS__)
#define MSE_API(arg, ...) \
DDMOZ_LOG(GetMediaSourceAPILog(), \
mozilla::LogLevel::Debug, \
"(%s)::%s: " arg, \
mType.OriginalString().Data(), \
__func__, \
##__VA_ARGS__)
namespace mozilla {
using media::TimeUnit;
typedef SourceBufferAttributes::AppendState AppendState;
namespace dom {
void
SourceBuffer::SetMode(SourceBufferAppendMode aMode, ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread());
MSE_API("SetMode(aMode=%" PRIu32 ")", static_cast<uint32_t>(aMode));
if (!IsAttached() || mUpdating) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
if (mCurrentAttributes.mGenerateTimestamps &&
aMode == SourceBufferAppendMode::Segments) {
aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
return;
}
MOZ_ASSERT(mMediaSource->ReadyState() != MediaSourceReadyState::Closed);
if (mMediaSource->ReadyState() == MediaSourceReadyState::Ended) {
mMediaSource->SetReadyState(MediaSourceReadyState::Open);
}
if (mCurrentAttributes.GetAppendState() == AppendState::PARSING_MEDIA_SEGMENT){
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
if (aMode == SourceBufferAppendMode::Sequence) {
// Will set GroupStartTimestamp to GroupEndTimestamp.
mCurrentAttributes.RestartGroupStartTimestamp();
}
mCurrentAttributes.SetAppendMode(aMode);
}
void
SourceBuffer::SetTimestampOffset(double aTimestampOffset, ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread());
MSE_API("SetTimestampOffset(aTimestampOffset=%f)", aTimestampOffset);
if (!IsAttached() || mUpdating) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
MOZ_ASSERT(mMediaSource->ReadyState() != MediaSourceReadyState::Closed);
if (mMediaSource->ReadyState() == MediaSourceReadyState::Ended) {
mMediaSource->SetReadyState(MediaSourceReadyState::Open);
}
if (mCurrentAttributes.GetAppendState() == AppendState::PARSING_MEDIA_SEGMENT){
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
mCurrentAttributes.SetApparentTimestampOffset(aTimestampOffset);
if (mCurrentAttributes.GetAppendMode() == SourceBufferAppendMode::Sequence) {
mCurrentAttributes.SetGroupStartTimestamp(mCurrentAttributes.GetTimestampOffset());
}
}
TimeRanges*
SourceBuffer::GetBuffered(ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread());
// http://w3c.github.io/media-source/index.html#widl-SourceBuffer-buffered
// 1. If this object has been removed from the sourceBuffers attribute of the parent media source then throw an InvalidStateError exception and abort these steps.
if (!IsAttached()) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
bool rangeChanged = true;
media::TimeIntervals intersection = mTrackBuffersManager->Buffered();
MSE_DEBUGV("intersection=%s", DumpTimeRanges(intersection).get());
if (mBuffered) {
media::TimeIntervals currentValue(mBuffered->ToTimeIntervals());
rangeChanged = (intersection != currentValue);
MSE_DEBUGV("currentValue=%s", DumpTimeRanges(currentValue).get());
}
// 5. If intersection ranges does not contain the exact same range information as the current value of this attribute, then update the current value of this attribute to intersection ranges.
if (rangeChanged) {
mBuffered = new TimeRanges(ToSupports(this), intersection);
}
// 6. Return the current value of this attribute.
return mBuffered;
}
media::TimeIntervals
SourceBuffer::GetTimeIntervals()
{
return mTrackBuffersManager->Buffered();
}
void
SourceBuffer::SetAppendWindowStart(double aAppendWindowStart, ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread());
MSE_API("SetAppendWindowStart(aAppendWindowStart=%f)", aAppendWindowStart);
DDLOG(DDLogCategory::API, "SetAppendWindowStart", aAppendWindowStart);
if (!IsAttached() || mUpdating) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
if (aAppendWindowStart < 0 ||
aAppendWindowStart >= mCurrentAttributes.GetAppendWindowEnd()) {
aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
return;
}
mCurrentAttributes.SetAppendWindowStart(aAppendWindowStart);
}
void
SourceBuffer::SetAppendWindowEnd(double aAppendWindowEnd, ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread());
MSE_API("SetAppendWindowEnd(aAppendWindowEnd=%f)", aAppendWindowEnd);
DDLOG(DDLogCategory::API, "SetAppendWindowEnd", aAppendWindowEnd);
if (!IsAttached() || mUpdating) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
if (IsNaN(aAppendWindowEnd) ||
aAppendWindowEnd <= mCurrentAttributes.GetAppendWindowStart()) {
aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
return;
}
mCurrentAttributes.SetAppendWindowEnd(aAppendWindowEnd);
}
void
SourceBuffer::AppendBuffer(const ArrayBuffer& aData, ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread());
MSE_API("AppendBuffer(ArrayBuffer)");
aData.ComputeLengthAndData();
DDLOG(DDLogCategory::API, "AppendBuffer", aData.Length());
AppendData(aData.Data(), aData.Length(), aRv);
}
void
SourceBuffer::AppendBuffer(const ArrayBufferView& aData, ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread());
MSE_API("AppendBuffer(ArrayBufferView)");
aData.ComputeLengthAndData();
DDLOG(DDLogCategory::API, "AppendBuffer", aData.Length());
AppendData(aData.Data(), aData.Length(), aRv);
}
already_AddRefed<Promise>
SourceBuffer::AppendBufferAsync(const ArrayBuffer& aData,
ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread());
MSE_API("AppendBufferAsync(ArrayBuffer)");
aData.ComputeLengthAndData();
DDLOG(DDLogCategory::API, "AppendBufferAsync", aData.Length());
return AppendDataAsync(aData.Data(), aData.Length(), aRv);
}
already_AddRefed<Promise>
SourceBuffer::AppendBufferAsync(const ArrayBufferView& aData,
ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread());
MSE_API("AppendBufferAsync(ArrayBufferView)");
aData.ComputeLengthAndData();
DDLOG(DDLogCategory::API, "AppendBufferAsync", aData.Length());
return AppendDataAsync(aData.Data(), aData.Length(), aRv);
}
void
SourceBuffer::Abort(ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread());
MSE_API("Abort()");
if (!IsAttached()) {
DDLOG(DDLogCategory::API, "Abort", NS_ERROR_DOM_INVALID_STATE_ERR);
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
if (mMediaSource->ReadyState() != MediaSourceReadyState::Open) {
DDLOG(DDLogCategory::API, "Abort", NS_ERROR_DOM_INVALID_STATE_ERR);
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
if (mPendingRemoval.Exists()) {
DDLOG(DDLogCategory::API, "Abort", NS_ERROR_DOM_INVALID_STATE_ERR);
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
DDLOG(DDLogCategory::API, "Abort", NS_OK);
AbortBufferAppend();
ResetParserState();
mCurrentAttributes.SetAppendWindowStart(0);
mCurrentAttributes.SetAppendWindowEnd(PositiveInfinity<double>());
}
void
SourceBuffer::AbortBufferAppend()
{
if (mUpdating) {
mCompletionPromise.DisconnectIfExists();
if (mPendingAppend.Exists()) {
mPendingAppend.Disconnect();
mTrackBuffersManager->AbortAppendData();
}
AbortUpdating();
}
}
void
SourceBuffer::ResetParserState()
{
mTrackBuffersManager->ResetParserState(mCurrentAttributes);
}
void
SourceBuffer::Remove(double aStart, double aEnd, ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread());
MSE_API("Remove(aStart=%f, aEnd=%f)", aStart, aEnd);
DDLOG(DDLogCategory::API, "Remove-from", aStart);
DDLOG(DDLogCategory::API, "Remove-until", aEnd);
PrepareRemove(aStart, aEnd, aRv);
if (aRv.Failed()) {
return;
}
RangeRemoval(aStart, aEnd);
}
already_AddRefed<Promise>
SourceBuffer::RemoveAsync(double aStart, double aEnd, ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread());
MSE_API("RemoveAsync(aStart=%f, aEnd=%f)", aStart, aEnd);
DDLOG(DDLogCategory::API, "Remove-from", aStart);
DDLOG(DDLogCategory::API, "Remove-until", aEnd);
if (!IsAttached()) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
nsCOMPtr<nsIGlobalObject> parentObject =
do_QueryInterface(mMediaSource->GetParentObject());
if (!parentObject) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
RefPtr<Promise> promise = Promise::Create(parentObject, aRv);
if (aRv.Failed()) {
return nullptr;
}
PrepareRemove(aStart, aEnd, aRv);
if (aRv.Failed()) {
// The bindings will automatically return a rejected promise.
return nullptr;
}
MOZ_ASSERT(!mDOMPromise, "Can't have a pending operation going");
mDOMPromise = promise;
RangeRemoval(aStart, aEnd);
return promise.forget();
}
void
SourceBuffer::PrepareRemove(double aStart, double aEnd, ErrorResult& aRv)
{
if (!IsAttached()) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
if (mUpdating) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
if (IsNaN(mMediaSource->Duration()) ||
aStart < 0 || aStart > mMediaSource->Duration() ||
aEnd <= aStart || IsNaN(aEnd)) {
aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
return;
}
if (mMediaSource->ReadyState() == MediaSourceReadyState::Ended) {
mMediaSource->SetReadyState(MediaSourceReadyState::Open);
}
}
void
SourceBuffer::RangeRemoval(double aStart, double aEnd)
{
StartUpdating();
RefPtr<SourceBuffer> self = this;
mTrackBuffersManager->RangeRemoval(TimeUnit::FromSeconds(aStart),
TimeUnit::FromSeconds(aEnd))
->Then(mAbstractMainThread, __func__,
[self] (bool) {
self->mPendingRemoval.Complete();
self->StopUpdating();
},
[]() { MOZ_ASSERT(false); })
->Track(mPendingRemoval);
}
void
SourceBuffer::ChangeType(const nsAString& aType, ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread());
// 1. If type is an empty string then throw a TypeError exception and abort
// these steps.
if (aType.IsEmpty()) {
aRv.Throw(NS_ERROR_DOM_TYPE_ERR);
return;
}
// 2. If this object has been removed from the sourceBuffers attribute of the
// parent media source , then throw an InvalidStateError exception and
// abort these steps.
// 3. If the updating attribute equals true, then throw an InvalidStateError
// exception and abort these steps.
if (!IsAttached() || mUpdating) {
DDLOG(DDLogCategory::API, "ChangeType", NS_ERROR_DOM_INVALID_STATE_ERR);
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
// 4. If type contains a MIME type that is not supported or contains a MIME
// type that is not supported with the types specified (currently or
// previously) of SourceBuffer objects in the sourceBuffers attribute of
// the parent media source , then throw a NotSupportedError exception and
// abort these steps.
DecoderDoctorDiagnostics diagnostics;
nsresult rv = MediaSource::IsTypeSupported(aType, &diagnostics);
diagnostics.StoreFormatDiagnostics(mMediaSource->GetOwner()
? mMediaSource->GetOwner()->GetExtantDoc()
: nullptr,
aType, NS_SUCCEEDED(rv), __func__);
MSE_API("ChangeType(aType=%s)%s",
NS_ConvertUTF16toUTF8(aType).get(),
rv == NS_OK ? "" : " [not supported]");
if (NS_FAILED(rv)) {
DDLOG(DDLogCategory::API, "ChangeType", rv);
aRv.Throw(rv);
return;
}
// 5. If the readyState attribute of the parent media source is in the "ended"
// state then run the following steps:
// 1. Set the readyState attribute of the parent media source to "open"
// 2. Queue a task to fire a simple event named sourceopen at the parent
// media source .
MOZ_ASSERT(mMediaSource->ReadyState() != MediaSourceReadyState::Closed);
if (mMediaSource->ReadyState() == MediaSourceReadyState::Ended) {
mMediaSource->SetReadyState(MediaSourceReadyState::Open);
}
Maybe<MediaContainerType> containerType = MakeMediaContainerType(aType);
MOZ_ASSERT(containerType);
mType = *containerType;
// 6. Run the reset parser state algorithm .
ResetParserState();
// 7. Update the generate timestamps flag on this SourceBuffer object to the
// value in the "Generate Timestamps Flag" column of the byte stream format
// registry [ MSE-REGISTRY ] entry that is associated with type .
if (mType.Type() == MEDIAMIMETYPE("audio/mpeg") ||
mType.Type() == MEDIAMIMETYPE("audio/aac")) {
mCurrentAttributes.mGenerateTimestamps = true;
// 8. If the generate timestamps flag equals true:
// Set the mode attribute on this SourceBuffer object to "sequence" ,
// including running the associated steps for that attribute being set.
ErrorResult dummy;
SetMode(SourceBufferAppendMode::Sequence, dummy);
} else {
mCurrentAttributes.mGenerateTimestamps = false;
// Otherwise: Keep the previous value of the mode attribute on this
// SourceBuffer object, without running any associated steps for that
// attribute being set.
}
// 9. Set pending initialization segment for changeType flag to true.
mTrackBuffersManager->ChangeType(mType);
}
void
SourceBuffer::Detach()
{
MOZ_ASSERT(NS_IsMainThread());
MSE_DEBUG("Detach");
if (!mMediaSource) {
MSE_DEBUG("Already detached");
return;
}
AbortBufferAppend();
if (mTrackBuffersManager) {
mMediaSource->GetDecoder()->GetDemuxer()->DetachSourceBuffer(
mTrackBuffersManager);
mTrackBuffersManager->Detach();
}
mTrackBuffersManager = nullptr;
mMediaSource = nullptr;
}
void
SourceBuffer::Ended()
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(IsAttached());
MSE_DEBUG("Ended");
mTrackBuffersManager->Ended();
}
SourceBuffer::SourceBuffer(MediaSource* aMediaSource,
const MediaContainerType& aType)
: DOMEventTargetHelper(aMediaSource->GetParentObject())
, mMediaSource(aMediaSource)
, mAbstractMainThread(aMediaSource->AbstractMainThread())
, mCurrentAttributes(aType.Type() == MEDIAMIMETYPE("audio/mpeg") ||
aType.Type() == MEDIAMIMETYPE("audio/aac"))
, mUpdating(false)
, mActive(false)
, mType(aType)
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aMediaSource);
mTrackBuffersManager =
new TrackBuffersManager(aMediaSource->GetDecoder(), aType);
DDLINKCHILD("track buffers manager", mTrackBuffersManager.get());
MSE_DEBUG("Create mTrackBuffersManager=%p",
mTrackBuffersManager.get());
ErrorResult dummy;
if (mCurrentAttributes.mGenerateTimestamps) {
SetMode(SourceBufferAppendMode::Sequence, dummy);
} else {
SetMode(SourceBufferAppendMode::Segments, dummy);
}
mMediaSource->GetDecoder()->GetDemuxer()->AttachSourceBuffer(
mTrackBuffersManager);
}
SourceBuffer::~SourceBuffer()
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!mMediaSource);
MSE_DEBUG("");
}
MediaSource*
SourceBuffer::GetParentObject() const
{
return mMediaSource;
}
JSObject*
SourceBuffer::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return SourceBuffer_Binding::Wrap(aCx, this, aGivenProto);
}
void
SourceBuffer::DispatchSimpleEvent(const char* aName)
{
MOZ_ASSERT(NS_IsMainThread());
MSE_API("Dispatch event '%s'", aName);
DispatchTrustedEvent(NS_ConvertUTF8toUTF16(aName));
}
void
SourceBuffer::QueueAsyncSimpleEvent(const char* aName)
{
MSE_DEBUG("Queuing event '%s'", aName);
nsCOMPtr<nsIRunnable> event = new AsyncEventRunner<SourceBuffer>(this, aName);
mAbstractMainThread->Dispatch(event.forget());
}
void
SourceBuffer::StartUpdating()
{
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(!mUpdating);
mUpdating = true;
QueueAsyncSimpleEvent("updatestart");
}
void
SourceBuffer::StopUpdating()
{
MOZ_ASSERT(NS_IsMainThread());
if (!mUpdating) {
// The buffer append or range removal algorithm has been interrupted by
// abort().
return;
}
mUpdating = false;
QueueAsyncSimpleEvent("update");
QueueAsyncSimpleEvent("updateend");
if (mDOMPromise) {
mDOMPromise->MaybeResolveWithUndefined();
mDOMPromise = nullptr;
}
}
void
SourceBuffer::AbortUpdating()
{
MOZ_ASSERT(NS_IsMainThread());
mUpdating = false;
QueueAsyncSimpleEvent("abort");
QueueAsyncSimpleEvent("updateend");
if (mDOMPromise) {
mDOMPromise->MaybeReject(NS_ERROR_DOM_MEDIA_ABORT_ERR);
mDOMPromise = nullptr;
}
}
void
SourceBuffer::CheckEndTime()
{
MOZ_ASSERT(NS_IsMainThread());
// Check if we need to update mMediaSource duration
double endTime = mCurrentAttributes.GetGroupEndTimestamp().ToSeconds();
double duration = mMediaSource->Duration();
if (endTime > duration) {
mMediaSource->SetDuration(endTime);
}
}
void
SourceBuffer::AppendData(const uint8_t* aData, uint32_t aLength, ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread());
MSE_DEBUG("AppendData(aLength=%u)", aLength);
RefPtr<MediaByteBuffer> data = PrepareAppend(aData, aLength, aRv);
if (!data) {
return;
}
StartUpdating();
mTrackBuffersManager->AppendData(data.forget(), mCurrentAttributes)
->Then(mAbstractMainThread, __func__, this,
&SourceBuffer::AppendDataCompletedWithSuccess,
&SourceBuffer::AppendDataErrored)
->Track(mPendingAppend);
}
already_AddRefed<Promise>
SourceBuffer::AppendDataAsync(const uint8_t* aData, uint32_t aLength, ErrorResult& aRv)
{
MOZ_ASSERT(NS_IsMainThread());
if (!IsAttached()) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
nsCOMPtr<nsIGlobalObject> parentObject =
do_QueryInterface(mMediaSource->GetParentObject());
if (!parentObject) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
RefPtr<Promise> promise = Promise::Create(parentObject, aRv);
if (aRv.Failed()) {
return nullptr;
}
AppendData(aData, aLength, aRv);
if (aRv.Failed()) {
return nullptr;
}
MOZ_ASSERT(!mDOMPromise, "Can't have a pending operation going");
mDOMPromise = promise;
return promise.forget();
}
void
SourceBuffer::AppendDataCompletedWithSuccess(
const SourceBufferTask::AppendBufferResult& aResult)
{
MOZ_ASSERT(mUpdating);
mPendingAppend.Complete();
DDLOG(DDLogCategory::API, "AppendBuffer-completed", NS_OK);
if (aResult.first()) {
if (!mActive) {
mActive = true;
MSE_DEBUG("Init segment received");
RefPtr<SourceBuffer> self = this;
mMediaSource->SourceBufferIsActive(this)
->Then(mAbstractMainThread, __func__,
[self, this]() {
MSE_DEBUG("Complete AppendBuffer operation");
mCompletionPromise.Complete();
StopUpdating();
})
->Track(mCompletionPromise);
}
}
if (mActive) {
// Tell our parent decoder that we have received new data
// and send progress event.
mMediaSource->GetDecoder()->NotifyDataArrived();
}
mCurrentAttributes = aResult.second();
CheckEndTime();
if (!mCompletionPromise.Exists()) {
StopUpdating();
}
}
void
SourceBuffer::AppendDataErrored(const MediaResult& aError)
{
MOZ_ASSERT(mUpdating);
mPendingAppend.Complete();
DDLOG(DDLogCategory::API, "AppendBuffer-error", aError);
switch (aError.Code()) {
case NS_ERROR_DOM_MEDIA_CANCELED:
// Nothing further to do as the trackbuffer has been shutdown.
// or append was aborted and abort() has handled all the events.
break;
default:
AppendError(aError);
break;
}
}
void
SourceBuffer::AppendError(const MediaResult& aDecodeError)
{
MOZ_ASSERT(NS_IsMainThread());
ResetParserState();
mUpdating = false;
QueueAsyncSimpleEvent("error");
QueueAsyncSimpleEvent("updateend");
MOZ_ASSERT(NS_FAILED(aDecodeError));
mMediaSource->EndOfStream(aDecodeError);
if (mDOMPromise) {
mDOMPromise->MaybeReject(aDecodeError);
mDOMPromise = nullptr;
}
}
already_AddRefed<MediaByteBuffer>
SourceBuffer::PrepareAppend(const uint8_t* aData,
uint32_t aLength,
ErrorResult& aRv)
{
typedef TrackBuffersManager::EvictDataResult Result;
if (!IsAttached() || mUpdating) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
// If the HTMLMediaElement.error attribute is not null, then throw an
// InvalidStateError exception and abort these steps.
if (!mMediaSource->GetDecoder() ||
mMediaSource->GetDecoder()->OwnerHasError()) {
MSE_DEBUG("HTMLMediaElement.error is not null");
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
if (mMediaSource->ReadyState() == MediaSourceReadyState::Ended) {
mMediaSource->SetReadyState(MediaSourceReadyState::Open);
}
// Eviction uses a byte threshold. If the buffer is greater than the
// number of bytes then data is evicted.
// TODO: Drive evictions off memory pressure notifications.
// TODO: Consider a global eviction threshold rather than per TrackBuffer.
// Give a chance to the TrackBuffersManager to evict some data if needed.
Result evicted =
mTrackBuffersManager->EvictData(TimeUnit::FromSeconds(mMediaSource->GetDecoder()->GetCurrentTime()),
aLength);
// See if we have enough free space to append our new data.
if (evicted == Result::BUFFER_FULL) {
aRv.Throw(NS_ERROR_DOM_QUOTA_EXCEEDED_ERR);
return nullptr;
}
RefPtr<MediaByteBuffer> data = new MediaByteBuffer();
if (!data->AppendElements(aData, aLength, fallible)) {
aRv.Throw(NS_ERROR_DOM_QUOTA_EXCEEDED_ERR);
return nullptr;
}
return data.forget();
}
double
SourceBuffer::GetBufferedStart()
{
MOZ_ASSERT(NS_IsMainThread());
ErrorResult dummy;
RefPtr<TimeRanges> ranges = GetBuffered(dummy);
return ranges->Length() > 0 ? ranges->GetStartTime() : 0;
}
double
SourceBuffer::GetBufferedEnd()
{
MOZ_ASSERT(NS_IsMainThread());
ErrorResult dummy;
RefPtr<TimeRanges> ranges = GetBuffered(dummy);
return ranges->Length() > 0 ? ranges->GetEndTime() : 0;
}
double
SourceBuffer::HighestStartTime()
{
MOZ_ASSERT(NS_IsMainThread());
return mTrackBuffersManager
? mTrackBuffersManager->HighestStartTime().ToSeconds()
: 0.0;
}
double
SourceBuffer::HighestEndTime()
{
MOZ_ASSERT(NS_IsMainThread());
return mTrackBuffersManager
? mTrackBuffersManager->HighestEndTime().ToSeconds()
: 0.0;
}
NS_IMPL_CYCLE_COLLECTION_CLASS(SourceBuffer)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(SourceBuffer)
tmp->Detach();
NS_IMPL_CYCLE_COLLECTION_UNLINK(mMediaSource)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mBuffered)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mDOMPromise)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END_INHERITED(DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(SourceBuffer,
DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mMediaSource)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mBuffered)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mDOMPromise)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_ADDREF_INHERITED(SourceBuffer, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(SourceBuffer, DOMEventTargetHelper)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(SourceBuffer)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
#undef MSE_DEBUG
#undef MSE_DEBUGV
#undef MSE_API
} // namespace dom
} // namespace mozilla
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