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gecko-dev/dom/media/webcodecs/EncoderTemplate.cpp
Chun-Min Chang 12b9abc253 Bug 1898103 - Rework EncoderConfigToDecoderConfig r=media-playback-reviewers,padenot 
This patch changes the output type of `EncoderConfigToDecoderConfig`
from `{Audio, Video}DecoderConfigInternal` to `{Audio,
Video}DecoderConfig`, moving the output from the return type to an
output parameter. This refactor serves two purposes:

1. Simplified decoder config generation: It streamlines the generation
   of a decoder config from the encoder config and encoded data,
   removing the need for a temporary `*DecoderConfigInternal`
   intermediary.
2. More flexible dtor visibility: It eliminates the need for a public
   `*DecoderConfigInternal` dtor, as it's no longer the return type.
   This is crucial for the upcoming patch, which will store the
   `*DecoderConfigInternal` within a `RefPtr`, necessitating a private
   dtor for the inner data type.

Differential Revision: https://phabricator.services.mozilla.com/D211129
2024-05-29 01:58:04 +00:00

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "EncoderTemplate.h"
#include "EncoderTypes.h"
#include "mozilla/ScopeExit.h"
#include "mozilla/Try.h"
#include "mozilla/Unused.h"
#include "mozilla/dom/DOMException.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/VideoFrame.h"
#include "mozilla/dom/WorkerCommon.h"
#include "nsGkAtoms.h"
#include "nsString.h"
#include "nsThreadUtils.h"
extern mozilla::LazyLogModule gWebCodecsLog;
namespace mozilla::dom {
#ifdef LOG_INTERNAL
# undef LOG_INTERNAL
#endif // LOG_INTERNAL
#define LOG_INTERNAL(level, msg, ...) \
MOZ_LOG(gWebCodecsLog, LogLevel::level, (msg, ##__VA_ARGS__))
#ifdef LOG
# undef LOG
#endif // LOG
#define LOG(msg, ...) LOG_INTERNAL(Debug, msg, ##__VA_ARGS__)
#ifdef LOGW
# undef LOGW
#endif // LOGW
#define LOGW(msg, ...) LOG_INTERNAL(Warning, msg, ##__VA_ARGS__)
#ifdef LOGE
# undef LOGE
#endif // LOGE
#define LOGE(msg, ...) LOG_INTERNAL(Error, msg, ##__VA_ARGS__)
#ifdef LOGV
# undef LOGV
#endif // LOGV
#define LOGV(msg, ...) LOG_INTERNAL(Verbose, msg, ##__VA_ARGS__)
/*
* Below are ControlMessage classes implementations
*/
template <typename EncoderType>
EncoderTemplate<EncoderType>::ControlMessage::ControlMessage(
WebCodecsId aConfigureId)
: mConfigureId(aConfigureId), mMessageId(sNextId++) {}
template <typename EncoderType>
EncoderTemplate<EncoderType>::ConfigureMessage::ConfigureMessage(
WebCodecsId aConfigureId, const RefPtr<ConfigTypeInternal>& aConfig)
: ControlMessage(aConfigureId), mConfig(aConfig) {}
template <typename EncoderType>
EncoderTemplate<EncoderType>::EncodeMessage::EncodeMessage(
WebCodecsId aConfigureId, RefPtr<InputTypeInternal>&& aData,
Maybe<VideoEncoderEncodeOptions>&& aOptions)
: ControlMessage(aConfigureId), mData(aData) {}
template <typename EncoderType>
EncoderTemplate<EncoderType>::FlushMessage::FlushMessage(
WebCodecsId aConfigureId)
: ControlMessage(aConfigureId) {}
/*
* Below are EncoderTemplate implementation
*/
template <typename EncoderType>
EncoderTemplate<EncoderType>::EncoderTemplate(
nsIGlobalObject* aGlobalObject,
RefPtr<WebCodecsErrorCallback>&& aErrorCallback,
RefPtr<OutputCallbackType>&& aOutputCallback)
: DOMEventTargetHelper(aGlobalObject),
mErrorCallback(std::move(aErrorCallback)),
mOutputCallback(std::move(aOutputCallback)),
mState(CodecState::Unconfigured),
mMessageQueueBlocked(false),
mEncodeQueueSize(0),
mDequeueEventScheduled(false),
mLatestConfigureId(0),
mEncodeCounter(0),
mFlushCounter(0) {}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::Configure(const ConfigType& aConfig,
ErrorResult& aRv) {
AssertIsOnOwningThread();
LOG("%s::Configure %p codec %s", EncoderType::Name.get(), this,
NS_ConvertUTF16toUTF8(aConfig.mCodec).get());
nsCString errorMessage;
if (!EncoderType::Validate(aConfig, errorMessage)) {
LOG("Configure: Validate error: %s", errorMessage.get());
aRv.ThrowTypeError(errorMessage);
return;
}
if (mState == CodecState::Closed) {
LOG("Configure: CodecState::Closed, rejecting with InvalidState");
aRv.ThrowInvalidStateError("The codec is no longer usable");
return;
}
// Clone a ConfigType as the active Encode config.
RefPtr<ConfigTypeInternal> config =
EncoderType::CreateConfigInternal(aConfig);
if (!config) {
CloseInternal(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
return;
}
mState = CodecState::Configured;
mEncodeCounter = 0;
mFlushCounter = 0;
mControlMessageQueue.push(MakeRefPtr<ConfigureMessage>(sNextId++, config));
mLatestConfigureId = mControlMessageQueue.back()->mMessageId;
LOG("%s %p enqueues %s", EncoderType::Name.get(), this,
mControlMessageQueue.back()->ToString().get());
ProcessControlMessageQueue();
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::EncodeAudioData(InputType& aInput,
ErrorResult& aRv) {
AssertIsOnOwningThread();
LOG("%s %p, EncodeAudioData", EncoderType::Name.get(), this);
if (mState != CodecState::Configured) {
aRv.ThrowInvalidStateError("Encoder must be configured first");
return;
}
if (aInput.IsClosed()) {
aRv.ThrowTypeError("input AudioData has been closed");
return;
}
mEncodeQueueSize += 1;
// Dummy options here as a shortcut
mControlMessageQueue.push(MakeRefPtr<EncodeMessage>(
mLatestConfigureId,
EncoderType::CreateInputInternal(aInput, VideoEncoderEncodeOptions())));
LOGV("%s %p enqueues %s", EncoderType::Name.get(), this,
mControlMessageQueue.back()->ToString().get());
ProcessControlMessageQueue();
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::EncodeVideoFrame(
InputType& aInput, const VideoEncoderEncodeOptions& aOptions,
ErrorResult& aRv) {
AssertIsOnOwningThread();
LOG("%s::Encode %p %s", EncoderType::Name.get(), this,
aInput.ToString().get());
if (mState != CodecState::Configured) {
aRv.ThrowInvalidStateError("Encoder must be configured first");
return;
}
if (aInput.IsClosed()) {
aRv.ThrowTypeError("input VideoFrame has been closed");
return;
}
mEncodeQueueSize += 1;
mControlMessageQueue.push(MakeRefPtr<EncodeMessage>(
mLatestConfigureId, EncoderType::CreateInputInternal(aInput, aOptions),
Some(aOptions)));
LOGV("%s %p enqueues %s", EncoderType::Name.get(), this,
mControlMessageQueue.back()->ToString().get());
ProcessControlMessageQueue();
}
template <typename EncoderType>
already_AddRefed<Promise> EncoderTemplate<EncoderType>::Flush(
ErrorResult& aRv) {
AssertIsOnOwningThread();
LOG("%s::Flush %p", EncoderType::Name.get(), this);
if (mState != CodecState::Configured) {
LOG("%s %p, wrong state!", EncoderType::Name.get(), this);
aRv.ThrowInvalidStateError("Encoder must be configured first");
return nullptr;
}
RefPtr<Promise> p = Promise::Create(GetParentObject(), aRv);
if (NS_WARN_IF(aRv.Failed())) {
return p.forget();
}
auto msg = MakeRefPtr<FlushMessage>(mLatestConfigureId);
const auto flushPromiseId = static_cast<int64_t>(msg->mMessageId);
MOZ_ASSERT(!mPendingFlushPromises.Contains(flushPromiseId));
mPendingFlushPromises.Insert(flushPromiseId, p);
mControlMessageQueue.emplace(std::move(msg));
LOG("%s %p enqueues %s", EncoderType::Name.get(), this,
mControlMessageQueue.back()->ToString().get());
ProcessControlMessageQueue();
return p.forget();
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::Reset(ErrorResult& aRv) {
AssertIsOnOwningThread();
LOG("%s %p, Reset", EncoderType::Name.get(), this);
if (auto r = ResetInternal(NS_ERROR_DOM_ABORT_ERR); r.isErr()) {
aRv.Throw(r.unwrapErr());
}
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::Close(ErrorResult& aRv) {
AssertIsOnOwningThread();
LOG("%s %p, Close", EncoderType::Name.get(), this);
if (auto r = CloseInternalWithAbort(); r.isErr()) {
aRv.Throw(r.unwrapErr());
}
}
template <typename EncoderType>
Result<Ok, nsresult> EncoderTemplate<EncoderType>::ResetInternal(
const nsresult& aResult) {
AssertIsOnOwningThread();
LOG("%s::Reset %p", EncoderType::Name.get(), this);
if (mState == CodecState::Closed) {
return Err(NS_ERROR_DOM_INVALID_STATE_ERR);
}
mState = CodecState::Unconfigured;
mEncodeCounter = 0;
mFlushCounter = 0;
CancelPendingControlMessagesAndFlushPromises(aResult);
DestroyEncoderAgentIfAny();
if (mEncodeQueueSize > 0) {
mEncodeQueueSize = 0;
ScheduleDequeueEvent();
}
StopBlockingMessageQueue();
return Ok();
}
template <typename EncoderType>
Result<Ok, nsresult> EncoderTemplate<EncoderType>::CloseInternalWithAbort() {
AssertIsOnOwningThread();
MOZ_TRY(ResetInternal(NS_ERROR_DOM_ABORT_ERR));
mState = CodecState::Closed;
return Ok();
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::CloseInternal(const nsresult& aResult) {
AssertIsOnOwningThread();
MOZ_ASSERT(aResult != NS_ERROR_DOM_ABORT_ERR, "Use CloseInternalWithAbort");
auto r = ResetInternal(aResult);
if (r.isErr()) {
nsCString name;
GetErrorName(r.unwrapErr(), name);
LOGE("Error during ResetInternal during CloseInternal: %s", name.get());
}
mState = CodecState::Closed;
nsCString error;
GetErrorName(aResult, error);
LOGE("%s %p Close on error: %s", EncoderType::Name.get(), this, error.get());
ReportError(aResult);
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::ReportError(const nsresult& aResult) {
AssertIsOnOwningThread();
RefPtr<DOMException> e = DOMException::Create(aResult);
RefPtr<WebCodecsErrorCallback> cb(mErrorCallback);
cb->Call(*e);
}
template <>
void EncoderTemplate<VideoEncoderTraits>::OutputEncodedVideoData(
const nsTArray<RefPtr<MediaRawData>>&& aData) {
AssertIsOnOwningThread();
MOZ_ASSERT(mState == CodecState::Configured);
MOZ_ASSERT(mActiveConfig);
// Get JSContext for RootedDictionary.
// The EncoderType::MetadataType, VideoDecoderConfig, and VideoColorSpaceInit
// below are rooted to work around the JS hazard issues.
AutoJSAPI jsapi;
if (!jsapi.Init(GetParentObject())) {
LOGE("%s %p AutoJSAPI init failed", VideoEncoderTraits::Name.get(), this);
return;
}
JSContext* cx = jsapi.cx();
RefPtr<EncodedVideoChunkOutputCallback> cb(mOutputCallback);
for (auto& data : aData) {
// It's possible to have reset() called in between this task having been
// dispatched, and running -- no output callback should happen when that's
// the case.
// This is imprecise in the spec, but discussed in
// https://github.com/w3c/webcodecs/issues/755 and agreed upon.
if (!mActiveConfig) {
return;
}
RefPtr<EncodedVideoChunk> encodedData =
EncodedDataToOutputType(GetParentObject(), data);
RootedDictionary<EncodedVideoChunkMetadata> metadata(cx);
if (mOutputNewDecoderConfig) {
RootedDictionary<VideoDecoderConfig> decoderConfig(cx);
EncoderConfigToDecoderConfig(cx, data, *mActiveConfig, decoderConfig);
metadata.mDecoderConfig.Construct(std::move(decoderConfig));
mOutputNewDecoderConfig = false;
LOG("New config passed to output callback");
}
nsAutoCString metadataInfo;
if (data->mTemporalLayerId) {
RootedDictionary<SvcOutputMetadata> svc(cx);
svc.mTemporalLayerId.Construct(data->mTemporalLayerId.value());
metadata.mSvc.Construct(std::move(svc));
metadataInfo.Append(
nsPrintfCString(", temporal layer id %d",
metadata.mSvc.Value().mTemporalLayerId.Value()));
}
if (metadata.mDecoderConfig.WasPassed()) {
metadataInfo.Append(", new decoder config");
}
LOG("EncoderTemplate:: output callback (ts: % " PRId64 ")%s",
encodedData->Timestamp(), metadataInfo.get());
cb->Call((EncodedVideoChunk&)(*encodedData), metadata);
}
}
template <>
void EncoderTemplate<AudioEncoderTraits>::OutputEncodedAudioData(
const nsTArray<RefPtr<MediaRawData>>&& aData) {
AssertIsOnOwningThread();
MOZ_ASSERT(mState == CodecState::Configured);
MOZ_ASSERT(mActiveConfig);
// Get JSContext for RootedDictionary.
// The EncoderType::MetadataType, AudioDecoderConfig
// below are rooted to work around the JS hazard issues.
AutoJSAPI jsapi;
if (!jsapi.Init(GetParentObject())) {
LOGE("%s %p AutoJSAPI init failed", AudioEncoderTraits::Name.get(), this);
return;
}
JSContext* cx = jsapi.cx();
RefPtr<EncodedAudioChunkOutputCallback> cb(mOutputCallback);
for (auto& data : aData) {
// It's possible to have reset() called in between this task having been
// dispatched, and running -- no output callback should happen when that's
// the case.
// This is imprecise in the spec, but discussed in
// https://github.com/w3c/webcodecs/issues/755 and agreed upon.
if (!mActiveConfig) {
return;
}
RefPtr<EncodedAudioChunk> encodedData =
EncodedDataToOutputType(GetParentObject(), data);
RootedDictionary<EncodedAudioChunkMetadata> metadata(cx);
if (mOutputNewDecoderConfig) {
RootedDictionary<AudioDecoderConfig> decoderConfig(cx);
EncoderConfigToDecoderConfig(cx, data, *mActiveConfig, decoderConfig);
metadata.mDecoderConfig.Construct(std::move(decoderConfig));
mOutputNewDecoderConfig = false;
LOG("New config passed to output callback");
}
nsAutoCString metadataInfo;
if (metadata.mDecoderConfig.WasPassed()) {
metadataInfo.Append(", new decoder config");
}
LOG("EncoderTemplate:: output callback (ts: % " PRId64
", duration: % " PRId64 ", %zu bytes, %" PRIu64 " so far)",
encodedData->Timestamp(),
!encodedData->GetDuration().IsNull()
? encodedData->GetDuration().Value()
: 0,
data->Size(), mPacketsOutput++);
cb->Call((EncodedAudioChunk&)(*encodedData), metadata);
}
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::ScheduleDequeueEvent() {
AssertIsOnOwningThread();
if (mDequeueEventScheduled) {
return;
}
mDequeueEventScheduled = true;
QueueATask("dequeue event task", [self = RefPtr{this}]() {
self->FireEvent(nsGkAtoms::ondequeue, u"dequeue"_ns);
self->mDequeueEventScheduled = false;
});
}
template <typename EncoderType>
nsresult EncoderTemplate<EncoderType>::FireEvent(nsAtom* aTypeWithOn,
const nsAString& aEventType) {
if (aTypeWithOn && !HasListenersFor(aTypeWithOn)) {
return NS_ERROR_ABORT;
}
LOGV("Dispatching %s event to %s %p", NS_ConvertUTF16toUTF8(aEventType).get(),
EncoderType::Name.get(), this);
RefPtr<Event> event = new Event(this, nullptr, nullptr);
event->InitEvent(aEventType, true, true);
event->SetTrusted(true);
this->DispatchEvent(*event);
return NS_OK;
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::SchedulePromiseResolveOrReject(
already_AddRefed<Promise> aPromise, const nsresult& aResult) {
AssertIsOnOwningThread();
RefPtr<Promise> p = aPromise;
auto resolver = [p, result = aResult] {
if (NS_FAILED(result)) {
p->MaybeReject(NS_ERROR_DOM_ENCODING_NOT_SUPPORTED_ERR);
return;
}
p->MaybeResolveWithUndefined();
};
nsISerialEventTarget* target = GetCurrentSerialEventTarget();
if (NS_IsMainThread()) {
MOZ_ALWAYS_SUCCEEDS(target->Dispatch(NS_NewRunnableFunction(
"SchedulePromiseResolveOrReject Runnable (main)", resolver)));
return;
}
MOZ_ALWAYS_SUCCEEDS(target->Dispatch(NS_NewCancelableRunnableFunction(
"SchedulePromiseResolveOrReject Runnable (worker)", resolver)));
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::ProcessControlMessageQueue() {
AssertIsOnOwningThread();
MOZ_ASSERT(mState == CodecState::Configured);
while (!mMessageQueueBlocked && !mControlMessageQueue.empty()) {
RefPtr<ControlMessage>& msg = mControlMessageQueue.front();
if (msg->AsConfigureMessage()) {
if (ProcessConfigureMessage(msg->AsConfigureMessage()) ==
MessageProcessedResult::NotProcessed) {
break;
}
} else if (msg->AsEncodeMessage()) {
if (ProcessEncodeMessage(msg->AsEncodeMessage()) ==
MessageProcessedResult::NotProcessed) {
break;
}
} else {
MOZ_ASSERT(msg->AsFlushMessage());
if (ProcessFlushMessage(msg->AsFlushMessage()) ==
MessageProcessedResult::NotProcessed) {
break;
}
}
}
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::CancelPendingControlMessagesAndFlushPromises(
const nsresult& aResult) {
AssertIsOnOwningThread();
// Cancel the message that is being processed.
if (mProcessingMessage) {
LOG("%s %p cancels current %s", EncoderType::Name.get(), this,
mProcessingMessage->ToString().get());
mProcessingMessage->Cancel();
mProcessingMessage = nullptr;
}
// Clear the message queue.
while (!mControlMessageQueue.empty()) {
LOG("%s %p cancels pending %s", EncoderType::Name.get(), this,
mControlMessageQueue.front()->ToString().get());
MOZ_ASSERT(!mControlMessageQueue.front()->IsProcessing());
mControlMessageQueue.pop();
}
// If there are pending flush promises, reject them.
mPendingFlushPromises.ForEach(
[&](const int64_t& id, const RefPtr<Promise>& p) {
LOG("%s %p, reject the promise for flush %" PRId64,
EncoderType::Name.get(), this, id);
p->MaybeReject(aResult);
});
mPendingFlushPromises.Clear();
}
template <typename EncoderType>
template <typename Func>
void EncoderTemplate<EncoderType>::QueueATask(const char* aName,
Func&& aSteps) {
AssertIsOnOwningThread();
MOZ_ALWAYS_SUCCEEDS(NS_DispatchToCurrentThread(
NS_NewRunnableFunction(aName, std::forward<Func>(aSteps))));
}
template <typename EncoderType>
MessageProcessedResult EncoderTemplate<EncoderType>::ProcessConfigureMessage(
RefPtr<ConfigureMessage> aMessage) {
AssertIsOnOwningThread();
MOZ_ASSERT(mState == CodecState::Configured);
MOZ_ASSERT(aMessage->AsConfigureMessage());
if (mProcessingMessage) {
return MessageProcessedResult::NotProcessed;
}
mProcessingMessage = aMessage;
mControlMessageQueue.pop();
LOG("%s %p Configuring, message queue processing blocked(%s)",
EncoderType::Name.get(), this, aMessage->ToString().get());
StartBlockingMessageQueue();
bool supported = EncoderType::IsSupported(*aMessage->Config());
if (!supported) {
LOGE("%s %p ProcessConfigureMessage error (sync): Not supported",
EncoderType::Name.get(), this);
mProcessingMessage = nullptr;
QueueATask(
"Error while configuring encoder",
[self = RefPtr(this)]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
LOGE("%s %p ProcessConfigureMessage (async close): Not supported",
EncoderType::Name.get(), self.get());
self->CloseInternal(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
});
return MessageProcessedResult::Processed;
}
if (mAgent) {
Reconfigure(aMessage);
} else {
Configure(aMessage);
}
return MessageProcessedResult::Processed;
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::StartBlockingMessageQueue() {
LOG("=== Message queue blocked");
mMessageQueueBlocked = true;
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::StopBlockingMessageQueue() {
LOG("=== Message queue unblocked");
mMessageQueueBlocked = false;
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::OutputEncodedData(
const nsTArray<RefPtr<MediaRawData>>&& aData) {
if constexpr (std::is_same_v<EncoderType, VideoEncoderTraits>) {
OutputEncodedVideoData(std::move(aData));
} else {
OutputEncodedAudioData(std::move(aData));
}
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::Reconfigure(
RefPtr<ConfigureMessage> aMessage) {
MOZ_ASSERT(mAgent);
LOG("Reconfiguring encoder: %s", aMessage->Config()->ToString().get());
RefPtr<ConfigTypeInternal> config = aMessage->Config();
RefPtr<WebCodecsConfigurationChangeList> configDiff =
config->Diff(*mActiveConfig);
// Nothing to do, return now, but per spec the config
// must be output next time a packet is output.
if (configDiff->Empty()) {
mOutputNewDecoderConfig = true;
LOG("Reconfigure with identical config, returning.");
mProcessingMessage = nullptr;
StopBlockingMessageQueue();
return;
}
LOG("Attempting to reconfigure encoder: old: %s new: %s, diff: %s",
mActiveConfig->ToString().get(), config->ToString().get(),
configDiff->ToString().get());
RefPtr<EncoderConfigurationChangeList> changeList =
configDiff->ToPEMChangeList();
// Attempt to reconfigure the encoder, if the config is similar enough.
// Otherwise, or if reconfiguring on the fly didn't work, flush the encoder
// and recreate a new one.
mAgent->Reconfigure(changeList)
->Then(
GetCurrentSerialEventTarget(), __func__,
[self = RefPtr{this}, id = mAgent->mId,
message = std::move(aMessage)](
const EncoderAgent::ReconfigurationPromise::ResolveOrRejectValue&
aResult) {
MOZ_ASSERT(self->mProcessingMessage);
MOZ_ASSERT(self->mProcessingMessage->AsConfigureMessage());
MOZ_ASSERT(self->mState == CodecState::Configured);
MOZ_ASSERT(self->mAgent);
MOZ_ASSERT(id == self->mAgent->mId);
MOZ_ASSERT(self->mActiveConfig);
if (aResult.IsReject()) {
LOGE(
"Reconfiguring on the fly didn't succeed, flushing and "
"configuring a new encoder");
self->mAgent->Drain()->Then(
GetCurrentSerialEventTarget(), __func__,
[self, id,
message](EncoderAgent::EncodePromise::ResolveOrRejectValue&&
aResult) {
if (aResult.IsReject()) {
// The spec asks to close the encoder with an
// NotSupportedError so we log the exact error here.
const MediaResult& error = aResult.RejectValue();
LOGE("%s %p, EncoderAgent #%zu failed to configure: %s",
EncoderType::Name.get(), self.get(), id,
error.Description().get());
self->QueueATask(
"Error during drain during reconfigure",
[self = RefPtr{self}]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
MOZ_ASSERT(self->mState != CodecState::Closed);
self->CloseInternal(
NS_ERROR_DOM_ENCODING_NOT_SUPPORTED_ERR);
});
return;
}
LOG("%s %p flush during reconfiguration succeeded.",
EncoderType::Name.get(), self.get());
// If flush succeeded, schedule to output encoded data
// first, destroy the current encoder, and proceed to create
// a new one.
MOZ_ASSERT(aResult.IsResolve());
nsTArray<RefPtr<MediaRawData>> data =
std::move(aResult.ResolveValue());
if (data.IsEmpty()) {
LOG("%s %p no data during flush for reconfiguration with "
"encoder destruction",
EncoderType::Name.get(), self.get());
} else {
LOG("%s %p Outputing %zu frames during flush "
" for reconfiguration with encoder destruction",
EncoderType::Name.get(), self.get(), data.Length());
self->QueueATask(
"Output encoded Data",
[self = RefPtr{self}, data = std::move(data)]()
MOZ_CAN_RUN_SCRIPT_BOUNDARY {
self->OutputEncodedData(std::move(data));
});
}
self->QueueATask(
"Destroy + recreate encoder after failed reconfigure",
[self = RefPtr(self), message]()
MOZ_CAN_RUN_SCRIPT_BOUNDARY {
// Destroy the agent, and finally create a fresh
// encoder with the new configuration.
self->DestroyEncoderAgentIfAny();
self->Configure(message);
});
});
return;
}
LOG("%s %p, EncoderAgent #%zu has been reconfigured on the fly to "
"%s",
EncoderType::Name.get(), self.get(), id,
message->ToString().get());
self->mOutputNewDecoderConfig = true;
self->mActiveConfig = message->Config();
self->mProcessingMessage = nullptr;
self->StopBlockingMessageQueue();
self->ProcessControlMessageQueue();
});
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::Configure(
RefPtr<ConfigureMessage> aMessage) {
MOZ_ASSERT(!mAgent);
LOG("Configuring encoder: %s", aMessage->Config()->ToString().get());
mOutputNewDecoderConfig = true;
mActiveConfig = aMessage->Config();
bool encoderAgentCreated =
CreateEncoderAgent(aMessage->mMessageId, aMessage->Config());
if (!encoderAgentCreated) {
LOGE(
"%s %p ProcessConfigureMessage error (sync): encoder agent "
"creation "
"failed",
EncoderType::Name.get(), this);
mProcessingMessage = nullptr;
QueueATask(
"Error when configuring encoder (encoder agent creation failed)",
[self = RefPtr(this)]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
MOZ_ASSERT(self->mState != CodecState::Closed);
LOGE(
"%s %p ProcessConfigureMessage (async close): encoder agent "
"creation failed",
EncoderType::Name.get(), self.get());
self->CloseInternal(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
});
return;
}
MOZ_ASSERT(mAgent);
MOZ_ASSERT(mActiveConfig);
LOG("Real configuration with fresh config: %s",
mActiveConfig->ToString().get());
EncoderConfig config = mActiveConfig->ToEncoderConfig();
mAgent->Configure(config)
->Then(GetCurrentSerialEventTarget(), __func__,
[self = RefPtr{this}, id = mAgent->mId, aMessage](
const EncoderAgent::ConfigurePromise::ResolveOrRejectValue&
aResult) MOZ_CAN_RUN_SCRIPT_BOUNDARY {
MOZ_ASSERT(self->mProcessingMessage);
MOZ_ASSERT(self->mProcessingMessage->AsConfigureMessage());
MOZ_ASSERT(self->mState == CodecState::Configured);
MOZ_ASSERT(self->mAgent);
MOZ_ASSERT(id == self->mAgent->mId);
MOZ_ASSERT(self->mActiveConfig);
LOG("%s %p, EncoderAgent #%zu %s has been %s. now unblocks "
"message-queue-processing",
EncoderType::Name.get(), self.get(), id,
aMessage->ToString().get(),
aResult.IsResolve() ? "resolved" : "rejected");
aMessage->Complete();
self->mProcessingMessage = nullptr;
if (aResult.IsReject()) {
// The spec asks to close the decoder with an
// NotSupportedError so we log the exact error here.
const MediaResult& error = aResult.RejectValue();
LOGE("%s %p, EncoderAgent #%zu failed to configure: %s",
EncoderType::Name.get(), self.get(), id,
error.Description().get());
self->QueueATask(
"Error during configure",
[self = RefPtr{self}]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
MOZ_ASSERT(self->mState != CodecState::Closed);
self->CloseInternal(
NS_ERROR_DOM_ENCODING_NOT_SUPPORTED_ERR);
});
return;
}
self->StopBlockingMessageQueue();
self->ProcessControlMessageQueue();
})
->Track(aMessage->Request());
}
template <typename EncoderType>
MessageProcessedResult EncoderTemplate<EncoderType>::ProcessEncodeMessage(
RefPtr<EncodeMessage> aMessage) {
AssertIsOnOwningThread();
MOZ_ASSERT(mState == CodecState::Configured);
MOZ_ASSERT(aMessage->AsEncodeMessage());
if (mProcessingMessage) {
return MessageProcessedResult::NotProcessed;
}
mProcessingMessage = aMessage;
mControlMessageQueue.pop();
LOGV("%s %p processing %s", EncoderType::Name.get(), this,
aMessage->ToString().get());
mEncodeQueueSize -= 1;
ScheduleDequeueEvent();
// Treat it like decode error if no EncoderAgent is available or the encoded
// data is invalid.
auto closeOnError = [&]() {
mProcessingMessage = nullptr;
QueueATask("Error during encode",
[self = RefPtr{this}]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
MOZ_ASSERT(self->mState != CodecState::Closed);
self->CloseInternal(NS_ERROR_DOM_ENCODING_NOT_SUPPORTED_ERR);
});
return MessageProcessedResult::Processed;
};
if (!mAgent) {
LOGE("%s %p is not configured", EncoderType::Name.get(), this);
return closeOnError();
}
MOZ_ASSERT(mActiveConfig);
RefPtr<InputTypeInternal> data = aMessage->mData;
if (!data) {
LOGE("%s %p, data for %s is empty or invalid", EncoderType::Name.get(),
this, aMessage->ToString().get());
return closeOnError();
}
mAgent->Encode(data.get())
->Then(GetCurrentSerialEventTarget(), __func__,
[self = RefPtr{this}, id = mAgent->mId, aMessage](
EncoderAgent::EncodePromise::ResolveOrRejectValue&& aResult) {
MOZ_ASSERT(self->mProcessingMessage);
MOZ_ASSERT(self->mProcessingMessage->AsEncodeMessage());
MOZ_ASSERT(self->mState == CodecState::Configured);
MOZ_ASSERT(self->mAgent);
MOZ_ASSERT(id == self->mAgent->mId);
MOZ_ASSERT(self->mActiveConfig);
nsCString msgStr = aMessage->ToString();
aMessage->Complete();
self->mProcessingMessage = nullptr;
if (aResult.IsReject()) {
// The spec asks to queue a task to run close the decoder
// with an EncodingError so we log the exact error here.
const MediaResult& error = aResult.RejectValue();
LOGE("%s %p, EncoderAgent #%zu %s failed: %s",
EncoderType::Name.get(), self.get(), id, msgStr.get(),
error.Description().get());
self->QueueATask(
"Error during encode runnable",
[self = RefPtr{self}]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
MOZ_ASSERT(self->mState != CodecState::Closed);
self->CloseInternal(
NS_ERROR_DOM_ENCODING_NOT_SUPPORTED_ERR);
});
return;
}
MOZ_ASSERT(aResult.IsResolve());
nsTArray<RefPtr<MediaRawData>> data =
std::move(aResult.ResolveValue());
if (data.IsEmpty()) {
LOGV("%s %p got no data for %s", EncoderType::Name.get(),
self.get(), msgStr.get());
} else {
LOGV("%s %p, schedule %zu encoded data output for %s",
EncoderType::Name.get(), self.get(), data.Length(),
msgStr.get());
self->QueueATask(
"Output encoded Data",
[self = RefPtr{self}, data2 = std::move(data)]()
MOZ_CAN_RUN_SCRIPT_BOUNDARY {
self->OutputEncodedData(std::move(data2));
});
}
self->ProcessControlMessageQueue();
})
->Track(aMessage->Request());
return MessageProcessedResult::Processed;
}
template <typename EncoderType>
MessageProcessedResult EncoderTemplate<EncoderType>::ProcessFlushMessage(
RefPtr<FlushMessage> aMessage) {
AssertIsOnOwningThread();
MOZ_ASSERT(mState == CodecState::Configured);
MOZ_ASSERT(aMessage->AsFlushMessage());
if (mProcessingMessage) {
return MessageProcessedResult::NotProcessed;
}
mProcessingMessage = aMessage;
mControlMessageQueue.pop();
LOG("%s %p starts processing %s", EncoderType::Name.get(), this,
aMessage->ToString().get());
// No agent, no thing to do. The promise has been rejected with the
// appropriate error in ResetInternal already.
if (!mAgent) {
LOGE("%s %p no agent, nothing to do", EncoderType::Name.get(), this);
mProcessingMessage = nullptr;
return MessageProcessedResult::Processed;
}
mAgent->Drain()
->Then(GetCurrentSerialEventTarget(), __func__,
[self = RefPtr{this}, id = mAgent->mId, aMessage, this](
EncoderAgent::EncodePromise::ResolveOrRejectValue&& aResult) {
MOZ_ASSERT(self->mProcessingMessage);
MOZ_ASSERT(self->mProcessingMessage->AsFlushMessage());
MOZ_ASSERT(self->mState == CodecState::Configured);
MOZ_ASSERT(self->mAgent);
MOZ_ASSERT(id == self->mAgent->mId);
MOZ_ASSERT(self->mActiveConfig);
LOG("%s %p, EncoderAgent #%zu %s has been %s",
EncoderType::Name.get(), self.get(), id,
aMessage->ToString().get(),
aResult.IsResolve() ? "resolved" : "rejected");
nsCString msgStr = aMessage->ToString();
aMessage->Complete();
// If flush failed, it means encoder fails to encode the data
// sent before, so we treat it like an encode error. We reject
// the promise first and then queue a task to close VideoEncoder
// with an EncodingError.
if (aResult.IsReject()) {
const MediaResult& error = aResult.RejectValue();
LOGE("%s %p, EncoderAgent #%zu failed to flush: %s",
EncoderType::Name.get(), self.get(), id,
error.Description().get());
// Reject with an EncodingError instead of the error we got
// above.
self->QueueATask(
"Error during flush runnable",
[self = RefPtr{this}]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
// If Reset() was invoked before this task executes, the
// promise in mPendingFlushPromises is handled there.
// Otherwise, the promise is going to be rejected by
// CloseInternal() below.
self->mProcessingMessage = nullptr;
MOZ_ASSERT(self->mState != CodecState::Closed);
self->CloseInternal(
NS_ERROR_DOM_ENCODING_NOT_SUPPORTED_ERR);
});
return;
}
// If flush succeeded, schedule to output encoded data first
// and then resolve the promise, then keep processing the
// control messages.
MOZ_ASSERT(aResult.IsResolve());
nsTArray<RefPtr<MediaRawData>> data =
std::move(aResult.ResolveValue());
if (data.IsEmpty()) {
LOG("%s %p gets no data for %s", EncoderType::Name.get(),
self.get(), msgStr.get());
} else {
LOG("%s %p, schedule %zu encoded data output for %s",
EncoderType::Name.get(), self.get(), data.Length(),
msgStr.get());
}
const auto flushPromiseId =
static_cast<int64_t>(aMessage->mMessageId);
self->QueueATask(
"Flush: output encoded data task",
[self = RefPtr{self}, data = std::move(data),
flushPromiseId]() MOZ_CAN_RUN_SCRIPT_BOUNDARY {
self->OutputEncodedData(std::move(data));
// If Reset() was invoked before this task executes, or
// during the output callback above in the execution of
// this task, the promise in mPendingFlushPromises is
// handled there. Otherwise, the promise is resolved here.
if (Maybe<RefPtr<Promise>> p =
self->mPendingFlushPromises.Take(flushPromiseId)) {
LOG("%s %p, resolving the promise for flush %" PRId64,
EncoderType::Name.get(), self.get(), flushPromiseId);
p.value()->MaybeResolveWithUndefined();
}
});
self->mProcessingMessage = nullptr;
self->ProcessControlMessageQueue();
})
->Track(aMessage->Request());
return MessageProcessedResult::Processed;
}
// CreateEncoderAgent will create an EncoderAgent paired with a xpcom-shutdown
// blocker and a worker-reference. Besides the needs mentioned in the header
// file, the blocker and the worker-reference also provides an entry point for
// us to clean up the resources. Other than the encoder dtor, Reset(), or
// Close(), the resources should be cleaned up in the following situations:
// 1. Encoder on window, closing document
// 2. Encoder on worker, closing document
// 3. Encoder on worker, terminating worker
//
// In case 1, the entry point to clean up is in the mShutdownBlocker's
// ShutdownpPomise-resolver. In case 2, the entry point is in mWorkerRef's
// shutting down callback. In case 3, the entry point is in mWorkerRef's
// shutting down callback.
template <typename EncoderType>
bool EncoderTemplate<EncoderType>::CreateEncoderAgent(
WebCodecsId aId, RefPtr<ConfigTypeInternal> aConfig) {
AssertIsOnOwningThread();
MOZ_ASSERT(mState == CodecState::Configured);
MOZ_ASSERT(!mAgent);
MOZ_ASSERT(!mShutdownBlocker);
MOZ_ASSERT_IF(!NS_IsMainThread(), !mWorkerRef);
auto resetOnFailure = MakeScopeExit([&]() {
mAgent = nullptr;
mActiveConfig = nullptr;
mShutdownBlocker = nullptr;
mWorkerRef = nullptr;
});
// If the encoder is on worker, get a worker reference.
if (!NS_IsMainThread()) {
WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
if (NS_WARN_IF(!workerPrivate)) {
return false;
}
// Clean up all the resources when worker is going away.
RefPtr<StrongWorkerRef> workerRef = StrongWorkerRef::Create(
workerPrivate, "EncoderTemplate::CreateEncoderAgent",
[self = RefPtr{this}]() {
LOG("%s %p, worker is going away", EncoderType::Name.get(),
self.get());
Unused << self->ResetInternal(NS_ERROR_DOM_ABORT_ERR);
});
if (NS_WARN_IF(!workerRef)) {
return false;
}
mWorkerRef = new ThreadSafeWorkerRef(workerRef);
}
mAgent = MakeRefPtr<EncoderAgent>(aId);
// ShutdownBlockingTicket requires an unique name to register its own
// nsIAsyncShutdownBlocker since each blocker needs a distinct name.
// To do that, we use EncoderAgent's unique id to create a unique name.
nsAutoString uniqueName;
uniqueName.AppendPrintf(
"Blocker for EncoderAgent #%zu (codec: %s) @ %p", mAgent->mId,
NS_ConvertUTF16toUTF8(mActiveConfig->mCodec).get(), mAgent.get());
mShutdownBlocker = media::ShutdownBlockingTicket::Create(
uniqueName, NS_LITERAL_STRING_FROM_CSTRING(__FILE__), __LINE__);
if (!mShutdownBlocker) {
LOGE("%s %p failed to create %s", EncoderType::Name.get(), this,
NS_ConvertUTF16toUTF8(uniqueName).get());
return false;
}
// Clean up all the resources when xpcom-will-shutdown arrives since the
// page is going to be closed.
mShutdownBlocker->ShutdownPromise()->Then(
GetCurrentSerialEventTarget(), __func__,
[self = RefPtr{this}, id = mAgent->mId,
ref = mWorkerRef](bool /* aUnUsed*/) {
LOG("%s %p gets xpcom-will-shutdown notification for EncoderAgent "
"#%zu",
EncoderType::Name.get(), self.get(), id);
Unused << self->ResetInternal(NS_ERROR_DOM_ABORT_ERR);
},
[self = RefPtr{this}, id = mAgent->mId,
ref = mWorkerRef](bool /* aUnUsed*/) {
LOG("%s %p removes shutdown-blocker #%zu before getting any "
"notification. EncoderAgent should have been dropped",
EncoderType::Name.get(), self.get(), id);
MOZ_ASSERT(!self->mAgent || self->mAgent->mId != id);
});
LOG("%s %p creates EncoderAgent #%zu @ %p and its shutdown-blocker",
EncoderType::Name.get(), this, mAgent->mId, mAgent.get());
resetOnFailure.release();
return true;
}
template <typename EncoderType>
void EncoderTemplate<EncoderType>::DestroyEncoderAgentIfAny() {
AssertIsOnOwningThread();
if (!mAgent) {
LOG("%s %p has no EncoderAgent to destroy", EncoderType::Name.get(), this);
return;
}
MOZ_ASSERT(mActiveConfig);
MOZ_ASSERT(mShutdownBlocker);
MOZ_ASSERT_IF(!NS_IsMainThread(), mWorkerRef);
LOG("%s %p destroys EncoderAgent #%zu @ %p", EncoderType::Name.get(), this,
mAgent->mId, mAgent.get());
mActiveConfig = nullptr;
RefPtr<EncoderAgent> agent = std::move(mAgent);
// mShutdownBlocker should be kept alive until the shutdown is done.
// mWorkerRef is used to ensure this task won't be discarded in worker.
agent->Shutdown()->Then(
GetCurrentSerialEventTarget(), __func__,
[self = RefPtr{this}, id = agent->mId, ref = std::move(mWorkerRef),
blocker = std::move(mShutdownBlocker)](
const ShutdownPromise::ResolveOrRejectValue& aResult) {
LOG("%s %p, EncoderAgent #%zu's shutdown has been %s. Drop its "
"shutdown-blocker now",
EncoderType::Name.get(), self.get(), id,
aResult.IsResolve() ? "resolved" : "rejected");
});
}
template class EncoderTemplate<VideoEncoderTraits>;
template class EncoderTemplate<AudioEncoderTraits>;
#undef LOG
#undef LOGW
#undef LOGE
#undef LOGV
#undef LOG_INTERNAL
} // namespace mozilla::dom
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