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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
#include "MediaSource.h"
#include "AsyncEventRunner.h"
#include "DecoderDoctorDiagnostics.h"
#include "DecoderTraits.h"
#include "MP4Decoder.h"
#include "MediaContainerType.h"
#include "MediaResult.h"
#include "MediaSourceDemuxer.h"
#include "SourceBuffer.h"
#include "SourceBufferList.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/Logging.h"
#include "mozilla/StaticPrefs_media.h"
#include "mozilla/dom/BindingDeclarations.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/HTMLMediaElement.h"
#include "mozilla/gfx/gfxVars.h"
#include "mozilla/glean/DomMediaMetrics.h"
#include "mozilla/mozalloc.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsGlobalWindowInner.h"
#include "nsIRunnable.h"
#include "nsIScriptObjectPrincipal.h"
#include "nsMimeTypes.h"
#include "nsPIDOMWindow.h"
#include "nsString.h"
#include "nsThreadUtils.h"
struct JSContext;
class JSObject;
mozilla::LogModule* GetMediaSourceLog() {
static mozilla::LazyLogModule sLogModule("MediaSource");
return sLogModule;
}
mozilla::LogModule* GetMediaSourceAPILog() {
static mozilla::LazyLogModule sLogModule("MediaSource");
return sLogModule;
}
#define MSE_DEBUG(arg, ...) \
DDMOZ_LOG(GetMediaSourceLog(), mozilla::LogLevel::Debug, "::%s: " arg, \
__func__, ##__VA_ARGS__)
#define MSE_API(arg, ...) \
DDMOZ_LOG(GetMediaSourceAPILog(), mozilla::LogLevel::Debug, "::%s: " arg, \
__func__, ##__VA_ARGS__)
// Arbitrary limit.
static const unsigned int MAX_SOURCE_BUFFERS = 16;
namespace mozilla {
// Returns true if we should enable MSE webm regardless of preferences.
// 1. If MP4/H264 isn't supported:
// * Windows XP
// * Windows Vista and Server 2008 without the optional "Platform Update
// Supplement"
// * N/KN editions (Europe and Korea) of Windows 7/8/8.1/10 without the
// optional "Windows Media Feature Pack"
// 2. If H264 hardware acceleration is not available.
// 3. The CPU is considered to be fast enough
static bool IsVP9Forced(DecoderDoctorDiagnostics* aDiagnostics) {
bool mp4supported = MP4Decoder::IsSupportedType(
MediaContainerType(MEDIAMIMETYPE(VIDEO_MP4)), aDiagnostics);
bool hwsupported = gfx::gfxVars::CanUseHardwareVideoDecoding();
#ifdef MOZ_WIDGET_ANDROID
return !mp4supported || !hwsupported ||
gfx::gfxVars::VP9HwDecodeIsAccelerated();
#else
return !mp4supported || !hwsupported;
#endif
}
namespace dom {
static void RecordTypeForTelemetry(const nsAString& aType,
nsPIDOMWindowInner* aWindow) {
Maybe<MediaContainerType> containerType = MakeMediaContainerType(aType);
if (!containerType) {
return;
}
const MediaMIMEType& mimeType = containerType->Type();
if (mimeType == MEDIAMIMETYPE(VIDEO_WEBM)) {
mozilla::glean::media::mse_source_buffer_type
.EnumGet(mozilla::glean::media::MseSourceBufferTypeLabel::eVideowebm)
.Add();
} else if (mimeType == MEDIAMIMETYPE(AUDIO_WEBM)) {
mozilla::glean::media::mse_source_buffer_type
.EnumGet(mozilla::glean::media::MseSourceBufferTypeLabel::eAudiowebm)
.Add();
} else if (mimeType == MEDIAMIMETYPE(VIDEO_MP4)) {
mozilla::glean::media::mse_source_buffer_type
.EnumGet(mozilla::glean::media::MseSourceBufferTypeLabel::eVideomp4)
.Add();
const auto& codecString = containerType->ExtendedType().Codecs().AsString();
if (StringBeginsWith(codecString, u"hev1"_ns) ||
StringBeginsWith(codecString, u"hvc1"_ns)) {
mozilla::glean::media::mse_source_buffer_type
.EnumGet(mozilla::glean::media::MseSourceBufferTypeLabel::eVideohevc)
.Add();
}
} else if (mimeType == MEDIAMIMETYPE(AUDIO_MP4)) {
mozilla::glean::media::mse_source_buffer_type
.EnumGet(mozilla::glean::media::MseSourceBufferTypeLabel::eAudiomp4)
.Add();
} else if (mimeType == MEDIAMIMETYPE(VIDEO_MPEG_TS)) {
mozilla::glean::media::mse_source_buffer_type
.EnumGet(mozilla::glean::media::MseSourceBufferTypeLabel::eVideomp2t)
.Add();
} else if (mimeType == MEDIAMIMETYPE(AUDIO_MPEG_TS)) {
mozilla::glean::media::mse_source_buffer_type
.EnumGet(mozilla::glean::media::MseSourceBufferTypeLabel::eAudiomp2t)
.Add();
} else if (mimeType == MEDIAMIMETYPE(AUDIO_MP3)) {
mozilla::glean::media::mse_source_buffer_type
.EnumGet(mozilla::glean::media::MseSourceBufferTypeLabel::eAudiompeg)
.Add();
} else if (mimeType == MEDIAMIMETYPE(AUDIO_AAC)) {
mozilla::glean::media::mse_source_buffer_type
.EnumGet(mozilla::glean::media::MseSourceBufferTypeLabel::eAudioaac)
.Add();
}
}
/* static */
void MediaSource::IsTypeSupported(const nsAString& aType,
DecoderDoctorDiagnostics* aDiagnostics,
ErrorResult& aRv,
Maybe<bool> aShouldResistFingerprinting) {
if (aType.IsEmpty()) {
return aRv.ThrowTypeError("Empty type");
}
Maybe<MediaContainerType> containerType = MakeMediaContainerType(aType);
if (!containerType) {
return aRv.ThrowNotSupportedError("Unknown type");
}
if (DecoderTraits::CanHandleContainerType(*containerType, aDiagnostics) ==
CANPLAY_NO) {
return aRv.ThrowNotSupportedError("Can't play type");
}
bool hasVP9 = false;
const MediaCodecs& codecs = containerType->ExtendedType().Codecs();
for (const auto& codec : codecs.Range()) {
if (IsVP9CodecString(codec)) {
hasVP9 = true;
break;
}
}
// Now we know that this media type could be played.
// MediaSource imposes extra restrictions, and some prefs.
// Avoid leaking information about the fact that it's pref-disabled,
// or that HW acceleration is available (only applicable to VP9 on Android).
bool shouldResistFingerprinting =
aShouldResistFingerprinting.isSome()
? aShouldResistFingerprinting.value()
: nsContentUtils::ShouldResistFingerprinting(
"Couldn't drill down ShouldResistFingerprinting",
RFPTarget::MediaCapabilities);
const MediaMIMEType& mimeType = containerType->Type();
if (mimeType == MEDIAMIMETYPE("video/mp4") ||
mimeType == MEDIAMIMETYPE("audio/mp4")) {
if (!StaticPrefs::media_mediasource_mp4_enabled() &&
!shouldResistFingerprinting) {
// Don't leak information about the fact that it's pref-disabled; just act
// like we can't play it. Or should this throw "Unknown type"?
return aRv.ThrowNotSupportedError("Can't play type");
}
if (!StaticPrefs::media_mediasource_vp9_enabled() && hasVP9 &&
!IsVP9Forced(aDiagnostics) && !shouldResistFingerprinting) {
// Don't leak information about the fact that it's pref-disabled; just act
// like we can't play it. Or should this throw "Unknown type"?
return aRv.ThrowNotSupportedError("Can't play type");
}
return;
}
if (mimeType == MEDIAMIMETYPE("video/webm")) {
if (!StaticPrefs::media_mediasource_webm_enabled() &&
!shouldResistFingerprinting) {
// Don't leak information about the fact that it's pref-disabled; just act
// like we can't play it. Or should this throw "Unknown type"?
return aRv.ThrowNotSupportedError("Can't play type");
}
if (!StaticPrefs::media_mediasource_vp9_enabled() && hasVP9 &&
!IsVP9Forced(aDiagnostics) && !shouldResistFingerprinting) {
// Don't leak information about the fact that it's pref-disabled; just act
// like we can't play it. Or should this throw "Unknown type"?
return aRv.ThrowNotSupportedError("Can't play type");
}
return;
}
if (mimeType == MEDIAMIMETYPE("audio/webm")) {
if (!StaticPrefs::media_mediasource_webm_enabled() &&
!shouldResistFingerprinting) {
// Don't leak information about the fact that it's pref-disabled; just act
// like we can't play it. Or should this throw "Unknown type"?
return aRv.ThrowNotSupportedError("Can't play type");
}
return;
}
return aRv.ThrowNotSupportedError("Type not supported in MediaSource");
}
/* static */
already_AddRefed<MediaSource> MediaSource::Constructor(
const GlobalObject& aGlobal, ErrorResult& aRv) {
nsCOMPtr<nsPIDOMWindowInner> window =
do_QueryInterface(aGlobal.GetAsSupports());
if (!window) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
RefPtr<MediaSource> mediaSource = new MediaSource(window);
return mediaSource.forget();
}
MediaSource::~MediaSource() {
MOZ_ASSERT(NS_IsMainThread());
MSE_API("");
if (mDecoder) {
mDecoder->DetachMediaSource();
}
}
SourceBufferList* MediaSource::SourceBuffers() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT_IF(mReadyState == MediaSourceReadyState::Closed,
mSourceBuffers->IsEmpty());
return mSourceBuffers;
}
SourceBufferList* MediaSource::ActiveSourceBuffers() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT_IF(mReadyState == MediaSourceReadyState::Closed,
mActiveSourceBuffers->IsEmpty());
return mActiveSourceBuffers;
}
MediaSourceReadyState MediaSource::ReadyState() {
MOZ_ASSERT(NS_IsMainThread());
return mReadyState;
}
double MediaSource::Duration() {
MOZ_ASSERT(NS_IsMainThread());
if (mReadyState == MediaSourceReadyState::Closed) {
return UnspecifiedNaN<double>();
}
MOZ_ASSERT(mDecoder);
return mDecoder->GetDuration();
}
void MediaSource::SetDuration(double aDuration, ErrorResult& aRv) {
MOZ_ASSERT(NS_IsMainThread());
if (aDuration < 0 || std::isnan(aDuration)) {
nsPrintfCString error("Invalid duration value %f", aDuration);
MSE_API("SetDuration(aDuration=%f, invalid value)", aDuration);
aRv.ThrowTypeError(error);
return;
}
if (mReadyState != MediaSourceReadyState::Open ||
mSourceBuffers->AnyUpdating()) {
MSE_API("SetDuration(aDuration=%f, invalid state)", aDuration);
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
DurationChange(aDuration, aRv);
MSE_API("SetDuration(aDuration=%f, errorCode=%d)", aDuration,
aRv.ErrorCodeAsInt());
}
void MediaSource::SetDuration(const media::TimeUnit& aDuration) {
MOZ_ASSERT(NS_IsMainThread());
MSE_API("SetDuration(aDuration=%f)", aDuration.ToSeconds());
mDecoder->SetMediaSourceDuration(aDuration);
}
already_AddRefed<SourceBuffer> MediaSource::AddSourceBuffer(
const nsAString& aType, ErrorResult& aRv) {
MOZ_ASSERT(NS_IsMainThread());
nsCOMPtr<nsPIDOMWindowInner> window = GetOwnerWindow();
Document* doc = window ? window->GetExtantDoc() : nullptr;
DecoderDoctorDiagnostics diagnostics;
IsTypeSupported(
aType, &diagnostics, aRv,
doc ? Some(doc->ShouldResistFingerprinting(RFPTarget::MediaCapabilities))
: Nothing());
RecordTypeForTelemetry(aType, window);
bool supported = !aRv.Failed();
diagnostics.StoreFormatDiagnostics(doc, aType, supported, __func__);
MSE_API("AddSourceBuffer(aType=%s)%s", NS_ConvertUTF16toUTF8(aType).get(),
supported ? "" : " [not supported]");
if (!supported) {
return nullptr;
}
if (mSourceBuffers->Length() >= MAX_SOURCE_BUFFERS) {
aRv.Throw(NS_ERROR_DOM_MEDIA_SOURCE_MAX_BUFFER_QUOTA_EXCEEDED_ERR);
return nullptr;
}
if (mReadyState != MediaSourceReadyState::Open) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
Maybe<MediaContainerType> containerType = MakeMediaContainerType(aType);
if (!containerType) {
aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return nullptr;
}
RefPtr<SourceBuffer> sourceBuffer = new SourceBuffer(this, *containerType);
mSourceBuffers->Append(sourceBuffer);
DDLINKCHILD("sourcebuffer[]", sourceBuffer.get());
MSE_DEBUG("sourceBuffer=%p", sourceBuffer.get());
return sourceBuffer.forget();
}
RefPtr<MediaSource::ActiveCompletionPromise> MediaSource::SourceBufferIsActive(
SourceBuffer* aSourceBuffer) {
MOZ_ASSERT(NS_IsMainThread());
mActiveSourceBuffers->ClearSimple();
bool initMissing = false;
bool found = false;
for (uint32_t i = 0; i < mSourceBuffers->Length(); i++) {
SourceBuffer* sourceBuffer = mSourceBuffers->IndexedGetter(i, found);
MOZ_ALWAYS_TRUE(found);
if (sourceBuffer == aSourceBuffer) {
mActiveSourceBuffers->Append(aSourceBuffer);
} else if (sourceBuffer->IsActive()) {
mActiveSourceBuffers->AppendSimple(sourceBuffer);
} else {
// Some source buffers haven't yet received an init segment.
// There's nothing more we can do at this stage.
initMissing = true;
}
}
if (initMissing || !mDecoder) {
return ActiveCompletionPromise::CreateAndResolve(true, __func__);
}
mDecoder->NotifyInitDataArrived();
// Add our promise to the queue.
// It will be resolved once the HTMLMediaElement modifies its readyState.
MozPromiseHolder<ActiveCompletionPromise> holder;
RefPtr<ActiveCompletionPromise> promise = holder.Ensure(__func__);
mCompletionPromises.AppendElement(std::move(holder));
return promise;
}
void MediaSource::CompletePendingTransactions() {
MOZ_ASSERT(NS_IsMainThread());
MSE_DEBUG("Resolving %u promises", unsigned(mCompletionPromises.Length()));
for (auto& promise : mCompletionPromises) {
promise.Resolve(true, __func__);
}
mCompletionPromises.Clear();
}
void MediaSource::RemoveSourceBuffer(SourceBuffer& aSourceBuffer,
ErrorResult& aRv) {
MOZ_ASSERT(NS_IsMainThread());
SourceBuffer* sourceBuffer = &aSourceBuffer;
MSE_API("RemoveSourceBuffer(aSourceBuffer=%p)", sourceBuffer);
if (!mSourceBuffers->Contains(sourceBuffer)) {
aRv.Throw(NS_ERROR_DOM_NOT_FOUND_ERR);
return;
}
sourceBuffer->AbortBufferAppend();
// TODO:
// abort stream append loop (if running)
// TODO:
// For all sourceBuffer audioTracks, videoTracks, textTracks:
// set sourceBuffer to null
// remove sourceBuffer video, audio, text Tracks from MediaElement tracks
// remove sourceBuffer video, audio, text Tracks and fire "removetrack" at
// affected lists fire "removetrack" at modified MediaElement track lists
// If removed enabled/selected, fire "change" at affected MediaElement list.
if (mActiveSourceBuffers->Contains(sourceBuffer)) {
mActiveSourceBuffers->Remove(sourceBuffer);
}
mSourceBuffers->Remove(sourceBuffer);
DDUNLINKCHILD(sourceBuffer);
// TODO: Free all resources associated with sourceBuffer
}
void MediaSource::EndOfStream(
const Optional<MediaSourceEndOfStreamError>& aError, ErrorResult& aRv) {
MOZ_ASSERT(NS_IsMainThread());
MSE_API("EndOfStream(aError=%d)",
aError.WasPassed() ? uint32_t(aError.Value()) : 0);
if (mReadyState != MediaSourceReadyState::Open ||
mSourceBuffers->AnyUpdating()) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
SetReadyState(MediaSourceReadyState::Ended);
mSourceBuffers->SetEnded(aError);
if (!aError.WasPassed()) {
DurationChangeOnEndOfStream();
// Notify reader that all data is now available.
mDecoder->Ended(true);
return;
}
switch (aError.Value()) {
case MediaSourceEndOfStreamError::Network:
mDecoder->NetworkError(MediaResult(NS_ERROR_FAILURE, "MSE network"));
break;
case MediaSourceEndOfStreamError::Decode:
mDecoder->DecodeError(NS_ERROR_DOM_MEDIA_FATAL_ERR);
break;
default:
MOZ_ASSERT_UNREACHABLE(
"Someone added a MediaSourceReadyState value and didn't handle it "
"here");
break;
}
}
void MediaSource::EndOfStream(const MediaResult& aError) {
MOZ_ASSERT(NS_IsMainThread());
MSE_API("EndOfStream(aError=%s)", aError.ErrorName().get());
SetReadyState(MediaSourceReadyState::Ended);
mSourceBuffers->SetEnded(Optional(MediaSourceEndOfStreamError::Decode));
mDecoder->DecodeError(aError);
}
/* static */
bool MediaSource::IsTypeSupported(const GlobalObject& aOwner,
const nsAString& aType) {
MOZ_ASSERT(NS_IsMainThread());
DecoderDoctorDiagnostics diagnostics;
IgnoredErrorResult rv;
nsCOMPtr<nsPIDOMWindowInner> window =
do_QueryInterface(aOwner.GetAsSupports());
Document* doc = window ? window->GetExtantDoc() : nullptr;
IsTypeSupported(
aType, &diagnostics, rv,
doc ? Some(doc->ShouldResistFingerprinting(RFPTarget::MediaCapabilities))
: Nothing());
bool supported = !rv.Failed();
RecordTypeForTelemetry(aType, window);
diagnostics.StoreFormatDiagnostics(doc, aType, supported, __func__);
MOZ_LOG(GetMediaSourceAPILog(), mozilla::LogLevel::Debug,
("MediaSource::%s: IsTypeSupported(aType=%s) %s", __func__,
NS_ConvertUTF16toUTF8(aType).get(),
supported ? "OK" : "[not supported]"));
return supported;
}
void MediaSource::SetLiveSeekableRange(double aStart, double aEnd,
ErrorResult& aRv) {
MOZ_ASSERT(NS_IsMainThread());
// 1. If the readyState attribute is not "open" then throw an
// InvalidStateError exception and abort these steps.
if (mReadyState != MediaSourceReadyState::Open) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
// 2. If start is negative or greater than end, then throw a TypeError
// exception and abort these steps.
if (aStart < 0 || aStart > aEnd) {
aRv.ThrowTypeError("Invalid start value");
return;
}
// 3. Set live seekable range to be a new normalized TimeRanges object
// containing a single range whose start position is start and end position is
// end.
mLiveSeekableRange = Some(media::TimeRanges(media::TimeRange(aStart, aEnd)));
}
void MediaSource::ClearLiveSeekableRange(ErrorResult& aRv) {
MOZ_ASSERT(NS_IsMainThread());
// 1. If the readyState attribute is not "open" then throw an
// InvalidStateError exception and abort these steps.
if (mReadyState != MediaSourceReadyState::Open) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
// 2. If live seekable range contains a range, then set live seekable range to
// be a new empty TimeRanges object.
mLiveSeekableRange.reset();
}
bool MediaSource::Attach(MediaSourceDecoder* aDecoder) {
MOZ_ASSERT(NS_IsMainThread());
MSE_DEBUG("Attach(aDecoder=%p) owner=%p", aDecoder, aDecoder->GetOwner());
MOZ_ASSERT(aDecoder);
MOZ_ASSERT(aDecoder->GetOwner());
if (mReadyState != MediaSourceReadyState::Closed) {
return false;
}
MOZ_ASSERT(!mMediaElement);
mMediaElement = aDecoder->GetOwner()->GetMediaElement();
MOZ_ASSERT(!mDecoder);
mDecoder = aDecoder;
mDecoder->AttachMediaSource(this);
SetReadyState(MediaSourceReadyState::Open);
return true;
}
void MediaSource::Detach() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_RELEASE_ASSERT(mCompletionPromises.IsEmpty());
MSE_DEBUG("mDecoder=%p owner=%p", mDecoder.get(),
mDecoder ? mDecoder->GetOwner() : nullptr);
if (!mDecoder) {
MOZ_ASSERT(mReadyState == MediaSourceReadyState::Closed);
MOZ_ASSERT(mActiveSourceBuffers->IsEmpty() && mSourceBuffers->IsEmpty());
return;
}
mMediaElement = nullptr;
SetReadyState(MediaSourceReadyState::Closed);
if (mActiveSourceBuffers) {
mActiveSourceBuffers->Clear();
}
if (mSourceBuffers) {
mSourceBuffers->Clear();
}
mDecoder->DetachMediaSource();
mDecoder = nullptr;
}
MediaSource::MediaSource(nsPIDOMWindowInner* aWindow)
: DOMEventTargetHelper(aWindow),
mDecoder(nullptr),
mPrincipal(nullptr),
mAbstractMainThread(AbstractThread::MainThread()),
mReadyState(MediaSourceReadyState::Closed) {
MOZ_ASSERT(NS_IsMainThread());
mSourceBuffers = new SourceBufferList(this);
mActiveSourceBuffers = new SourceBufferList(this);
nsCOMPtr<nsIScriptObjectPrincipal> sop = do_QueryInterface(aWindow);
if (sop) {
mPrincipal = sop->GetPrincipal();
}
MSE_API("MediaSource(aWindow=%p) mSourceBuffers=%p mActiveSourceBuffers=%p",
aWindow, mSourceBuffers.get(), mActiveSourceBuffers.get());
}
void MediaSource::SetReadyState(MediaSourceReadyState aState) {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(aState != mReadyState);
MSE_DEBUG("SetReadyState(aState=%" PRIu32 ") mReadyState=%" PRIu32,
static_cast<uint32_t>(aState), static_cast<uint32_t>(mReadyState));
MediaSourceReadyState oldState = mReadyState;
mReadyState = aState;
if (mReadyState == MediaSourceReadyState::Open &&
(oldState == MediaSourceReadyState::Closed ||
oldState == MediaSourceReadyState::Ended)) {
QueueAsyncSimpleEvent("sourceopen");
if (oldState == MediaSourceReadyState::Ended) {
// Notify reader that more data may come.
mDecoder->Ended(false);
}
return;
}
if (mReadyState == MediaSourceReadyState::Ended &&
oldState == MediaSourceReadyState::Open) {
QueueAsyncSimpleEvent("sourceended");
return;
}
if (mReadyState == MediaSourceReadyState::Closed &&
(oldState == MediaSourceReadyState::Open ||
oldState == MediaSourceReadyState::Ended)) {
QueueAsyncSimpleEvent("sourceclose");
return;
}
NS_WARNING("Invalid MediaSource readyState transition");
}
void MediaSource::DispatchSimpleEvent(const char* aName) {
MOZ_ASSERT(NS_IsMainThread());
MSE_API("Dispatch event '%s'", aName);
DispatchTrustedEvent(NS_ConvertUTF8toUTF16(aName));
}
void MediaSource::QueueAsyncSimpleEvent(const char* aName) {
MSE_DEBUG("Queuing event '%s'", aName);
nsCOMPtr<nsIRunnable> event = new AsyncEventRunner<MediaSource>(this, aName);
mAbstractMainThread->Dispatch(event.forget());
}
void MediaSource::DurationChangeOnEndOfStream() {
MOZ_ASSERT(NS_IsMainThread());
MOZ_ASSERT(mReadyState == MediaSourceReadyState::Ended);
// 3.1 Run the duration change algorithm with new duration set to the
// largest track buffer ranges end time across all the track buffers across
// all SourceBuffer objects in sourceBuffers.
// 1. If the current value of duration is equal to new duration, then return.
// 2. If new duration is less than the highest starting presentation timestamp
// of any buffered coded frames for all SourceBuffer objects in sourceBuffers,
// then throw an InvalidStateError exception and abort these steps.
// 3. Let highest end time be the largest track buffer ranges end time across
// all the track buffers across all SourceBuffer objects in sourceBuffers.
// 4. If new duration is less than highest end time, then
// 4.1 Update new duration to equal highest end time.
media::TimeUnit highestEndTime = mSourceBuffers->HighestEndTime();
// Highest track buffer ranges end time == highest end time when Ended, so
// new duration == highest end time and steps 2 and 4 are no-ops.
MOZ_ASSERT(highestEndTime == mSourceBuffers->GetHighestBufferedEndTime());
MOZ_ASSERT(highestEndTime >= mSourceBuffers->HighestStartTime());
// Truncate to microsecond resolution for consistency with the
// SourceBuffer.buffered getter. Do this before comparison because
// mDecoder->GetDuration() may have been similarly truncated.
media::TimeUnit newDuration = highestEndTime.ToBase(USECS_PER_S);
MSE_DEBUG("DurationChangeOnEndOfStream(newDuration=%s)",
newDuration.ToString().get());
if (mDecoder->GetDuration() == newDuration.ToSeconds()) {
return;
}
// 5. Update the media duration to new duration and run the HTMLMediaElement
// duration change algorithm.
mDecoder->SetMediaSourceDuration(newDuration);
}
void MediaSource::DurationChange(double aNewDuration, ErrorResult& aRv) {
MOZ_ASSERT(NS_IsMainThread());
MSE_DEBUG("DurationChange(aNewDuration=%f)", aNewDuration);
// 1. If the current value of duration is equal to new duration, then return.
if (mDecoder->GetDuration() == aNewDuration) {
return;
}
// 2. If new duration is less than the highest starting presentation timestamp
// of any buffered coded frames for all SourceBuffer objects in sourceBuffers,
// then throw an InvalidStateError exception and abort these steps.
if (aNewDuration < mSourceBuffers->HighestStartTime().ToSeconds()) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
// 3. Let highest end time be the largest track buffer ranges end time across
// all the track buffers across all SourceBuffer objects in sourceBuffers.
double highestEndTime = mSourceBuffers->HighestEndTime().ToSeconds();
// 4. If new duration is less than highest end time, then
// 4.1 Update new duration to equal highest end time.
double newDuration = std::max(aNewDuration, highestEndTime);
// 5. Update the media duration to new duration and run the HTMLMediaElement
// duration change algorithm.
mDecoder->SetMediaSourceDuration(newDuration);
}
already_AddRefed<Promise> MediaSource::MozDebugReaderData(ErrorResult& aRv) {
// Creating a JS promise
nsGlobalWindowInner* win = GetOwnerWindow();
if (!win) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
RefPtr<Promise> domPromise = Promise::Create(win, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
MOZ_ASSERT(domPromise);
UniquePtr<MediaSourceDecoderDebugInfo> info =
MakeUnique<MediaSourceDecoderDebugInfo>();
mDecoder->RequestDebugInfo(*info)->Then(
mAbstractMainThread, __func__,
[domPromise, infoPtr = std::move(info)] {
domPromise->MaybeResolve(infoPtr.get());
},
[] {
MOZ_ASSERT_UNREACHABLE("Unexpected rejection while getting debug data");
});
return domPromise.forget();
}
nsPIDOMWindowInner* MediaSource::GetParentObject() const {
return GetOwnerWindow();
}
JSObject* MediaSource::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return MediaSource_Binding::Wrap(aCx, this, aGivenProto);
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(MediaSource, DOMEventTargetHelper,
mMediaElement, mSourceBuffers,
mActiveSourceBuffers)
NS_IMPL_ADDREF_INHERITED(MediaSource, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(MediaSource, DOMEventTargetHelper)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaSource)
NS_INTERFACE_MAP_ENTRY_CONCRETE(mozilla::dom::MediaSource)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
#undef MSE_DEBUG
#undef MSE_API
} // namespace dom
} // namespace mozilla