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gecko-dev/dom/media/mediacapabilities/MediaCapabilities.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 "MediaCapabilities.h"
#include "AllocationPolicy.h"
#include "Benchmark.h"
#include "DecoderTraits.h"
#include "Layers.h"
#include "MediaInfo.h"
#include "MediaRecorder.h"
#include "PDMFactory.h"
#include "VPXDecoder.h"
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/Move.h"
#include "mozilla/StaticPrefs.h"
#include "mozilla/TaskQueue.h"
#include "mozilla/dom/DOMMozPromiseRequestHolder.h"
#include "mozilla/dom/MediaCapabilitiesBinding.h"
#include "mozilla/dom/MediaSource.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/WorkerPrivate.h"
#include "mozilla/dom/WorkerRef.h"
#include "mozilla/layers/KnowsCompositor.h"
#include "nsContentUtils.h"
#include <inttypes.h>
static mozilla::LazyLogModule sMediaCapabilitiesLog("MediaCapabilities");
#define LOG(msg, ...) \
DDMOZ_LOG(sMediaCapabilitiesLog, LogLevel::Debug, msg, ##__VA_ARGS__)
namespace mozilla {
namespace dom {
static nsCString VideoConfigurationToStr(const VideoConfiguration* aConfig) {
if (!aConfig) {
return nsCString();
}
auto str = nsPrintfCString(
"[contentType:%s width:%d height:%d bitrate:%" PRIu64 " framerate:%s]",
NS_ConvertUTF16toUTF8(aConfig->mContentType).get(), aConfig->mWidth,
aConfig->mHeight, aConfig->mBitrate,
NS_ConvertUTF16toUTF8(aConfig->mFramerate).get());
return std::move(str);
}
static nsCString AudioConfigurationToStr(const AudioConfiguration* aConfig) {
if (!aConfig) {
return nsCString();
}
auto str = nsPrintfCString(
"[contentType:%s channels:%s bitrate:%" PRIu64 " samplerate:%d]",
NS_ConvertUTF16toUTF8(aConfig->mContentType).get(),
aConfig->mChannels.WasPassed()
? NS_ConvertUTF16toUTF8(aConfig->mChannels.Value()).get()
: "?",
aConfig->mBitrate.WasPassed() ? aConfig->mBitrate.Value() : 0,
aConfig->mSamplerate.WasPassed() ? aConfig->mSamplerate.Value() : 0);
return std::move(str);
}
static nsCString MediaCapabilitiesInfoToStr(
const MediaCapabilitiesInfo* aInfo) {
if (!aInfo) {
return nsCString();
}
auto str = nsPrintfCString("[supported:%s smooth:%s powerEfficient:%s]",
aInfo->Supported() ? "true" : "false",
aInfo->Smooth() ? "true" : "false",
aInfo->PowerEfficient() ? "true" : "false");
return std::move(str);
}
static nsCString MediaDecodingConfigurationToStr(
const MediaDecodingConfiguration& aConfig) {
nsCString str;
str += NS_LITERAL_CSTRING("[");
if (aConfig.mVideo.WasPassed()) {
str += NS_LITERAL_CSTRING("video:") +
VideoConfigurationToStr(&aConfig.mVideo.Value());
if (aConfig.mAudio.WasPassed()) {
str += NS_LITERAL_CSTRING(" ");
}
}
if (aConfig.mAudio.WasPassed()) {
str += NS_LITERAL_CSTRING("audio:") +
AudioConfigurationToStr(&aConfig.mAudio.Value());
}
str += NS_LITERAL_CSTRING("]");
return str;
}
MediaCapabilities::MediaCapabilities(nsIGlobalObject* aParent)
: mParent(aParent) {}
already_AddRefed<Promise> MediaCapabilities::DecodingInfo(
const MediaDecodingConfiguration& aConfiguration, ErrorResult& aRv) {
RefPtr<Promise> promise = Promise::Create(mParent, aRv);
if (aRv.Failed()) {
return nullptr;
}
// If configuration is not a valid MediaConfiguration, return a Promise
// rejected with a TypeError.
if (!aConfiguration.mVideo.WasPassed() &&
!aConfiguration.mAudio.WasPassed()) {
aRv.ThrowTypeError<MSG_MISSING_REQUIRED_DICTIONARY_MEMBER>(
NS_LITERAL_STRING("'audio' or 'video'"));
return nullptr;
}
LOG("Processing %s", MediaDecodingConfigurationToStr(aConfiguration).get());
bool supported = true;
Maybe<MediaContainerType> videoContainer;
Maybe<MediaContainerType> audioContainer;
// If configuration.video is present and is not a valid video configuration,
// return a Promise rejected with a TypeError.
if (aConfiguration.mVideo.WasPassed()) {
videoContainer = CheckVideoConfiguration(aConfiguration.mVideo.Value());
if (!videoContainer) {
aRv.ThrowTypeError<MSG_INVALID_MEDIA_VIDEO_CONFIGURATION>();
return nullptr;
}
// We have a video configuration and it is valid. Check if it is supported.
supported &=
aConfiguration.mType == MediaDecodingType::File
? CheckTypeForFile(aConfiguration.mVideo.Value().mContentType)
: CheckTypeForMediaSource(
aConfiguration.mVideo.Value().mContentType);
}
if (aConfiguration.mAudio.WasPassed()) {
audioContainer = CheckAudioConfiguration(aConfiguration.mAudio.Value());
if (!audioContainer) {
aRv.ThrowTypeError<MSG_INVALID_MEDIA_AUDIO_CONFIGURATION>();
return nullptr;
}
// We have an audio configuration and it is valid. Check if it is supported.
supported &=
aConfiguration.mType == MediaDecodingType::File
? CheckTypeForFile(aConfiguration.mAudio.Value().mContentType)
: CheckTypeForMediaSource(
aConfiguration.mAudio.Value().mContentType);
}
if (!supported) {
auto info = MakeUnique<MediaCapabilitiesInfo>(
false /* supported */, false /* smooth */, false /* power efficient */);
LOG("%s -> %s", MediaDecodingConfigurationToStr(aConfiguration).get(),
MediaCapabilitiesInfoToStr(info.get()).get());
promise->MaybeResolve(std::move(info));
return promise.forget();
}
nsTArray<UniquePtr<TrackInfo>> tracks;
if (aConfiguration.mVideo.WasPassed()) {
MOZ_ASSERT(videoContainer.isSome(), "configuration is valid and supported");
auto videoTracks = DecoderTraits::GetTracksInfo(*videoContainer);
// If the MIME type does not imply a codec, the string MUST
// also have one and only one parameter that is named codecs with a value
// describing a single media codec. Otherwise, it MUST contain no
// parameters.
if (videoTracks.Length() != 1) {
promise->MaybeReject(NS_ERROR_DOM_TYPE_ERR);
return promise.forget();
}
MOZ_DIAGNOSTIC_ASSERT(videoTracks.ElementAt(0),
"must contain a valid trackinfo");
tracks.AppendElements(std::move(videoTracks));
}
if (aConfiguration.mAudio.WasPassed()) {
MOZ_ASSERT(audioContainer.isSome(), "configuration is valid and supported");
auto audioTracks = DecoderTraits::GetTracksInfo(*audioContainer);
// If the MIME type does not imply a codec, the string MUST
// also have one and only one parameter that is named codecs with a value
// describing a single media codec. Otherwise, it MUST contain no
// parameters.
if (audioTracks.Length() != 1) {
promise->MaybeReject(NS_ERROR_DOM_TYPE_ERR);
return promise.forget();
}
MOZ_DIAGNOSTIC_ASSERT(audioTracks.ElementAt(0),
"must contain a valid trackinfo");
tracks.AppendElements(std::move(audioTracks));
}
typedef MozPromise<MediaCapabilitiesInfo, MediaResult,
/* IsExclusive = */ true>
CapabilitiesPromise;
nsTArray<RefPtr<CapabilitiesPromise>> promises;
RefPtr<TaskQueue> taskQueue =
new TaskQueue(GetMediaThreadPool(MediaThreadType::PLATFORM_DECODER),
"MediaCapabilities::TaskQueue");
for (auto&& config : tracks) {
TrackInfo::TrackType type =
config->IsVideo() ? TrackInfo::kVideoTrack : TrackInfo::kAudioTrack;
MOZ_ASSERT(type == TrackInfo::kAudioTrack ||
videoContainer->ExtendedType().GetFramerate().isSome(),
"framerate is a required member of VideoConfiguration");
if (type == TrackInfo::kAudioTrack) {
// There's no need to create an audio decoder has we only want to know if
// such codec is supported
RefPtr<PDMFactory> pdm = new PDMFactory();
if (!pdm->Supports(*config, nullptr /* decoder doctor */)) {
auto info = MakeUnique<MediaCapabilitiesInfo>(
false /* supported */, false /* smooth */,
false /* power efficient */);
LOG("%s -> %s", MediaDecodingConfigurationToStr(aConfiguration).get(),
MediaCapabilitiesInfoToStr(info.get()).get());
promise->MaybeResolve(std::move(info));
return promise.forget();
}
// We can assume that if we could create the decoder, then we can play it.
// We report that we can play it smoothly and in an efficient fashion.
promises.AppendElement(CapabilitiesPromise::CreateAndResolve(
MediaCapabilitiesInfo(true /* supported */, true /* smooth */,
true /* power efficient */),
__func__));
continue;
}
// On Windows, the MediaDataDecoder expects to be created on a thread
// supporting MTA, which the main thread doesn't. So we use our task queue
// to create such decoder and perform initialization.
RefPtr<layers::KnowsCompositor> compositor = GetCompositor();
double frameRate = videoContainer->ExtendedType().GetFramerate().ref();
promises.AppendElement(InvokeAsync(
taskQueue, __func__,
[taskQueue, frameRate, compositor,
config = std::move(config)]() mutable -> RefPtr<CapabilitiesPromise> {
// MediaDataDecoder keeps a reference to the config object, so we must
// keep it alive until the decoder has been shutdown.
CreateDecoderParams params{
*config, taskQueue, compositor,
CreateDecoderParams::VideoFrameRate(frameRate),
TrackInfo::kVideoTrack};
// We want to ensure that all decoder's queries are occurring only
// once at a time as it can quickly exhaust the system resources
// otherwise.
static RefPtr<AllocPolicy> sVideoAllocPolicy = [&taskQueue]() {
SystemGroup::Dispatch(
TaskCategory::Other,
NS_NewRunnableFunction(
"MediaCapabilities::AllocPolicy:Video", []() {
ClearOnShutdown(&sVideoAllocPolicy,
ShutdownPhase::ShutdownThreads);
}));
return new SingleAllocPolicy(TrackInfo::TrackType::kVideoTrack,
taskQueue);
}();
return AllocationWrapper::CreateDecoder(params, sVideoAllocPolicy)
->Then(
taskQueue, __func__,
[taskQueue, frameRate, config = std::move(config)](
AllocationWrapper::AllocateDecoderPromise::
ResolveOrRejectValue&& aValue) mutable {
if (aValue.IsReject()) {
return CapabilitiesPromise::CreateAndReject(
std::move(aValue.RejectValue()), __func__);
}
RefPtr<MediaDataDecoder> decoder =
std::move(aValue.ResolveValue());
// We now query the decoder to determine if it's power
// efficient.
RefPtr<CapabilitiesPromise> p = decoder->Init()->Then(
taskQueue, __func__,
[taskQueue, decoder, frameRate,
config = std::move(config)](
MediaDataDecoder::InitPromise::
ResolveOrRejectValue&& aValue) mutable {
RefPtr<CapabilitiesPromise> p;
if (aValue.IsReject()) {
p = CapabilitiesPromise::CreateAndReject(
std::move(aValue.RejectValue()), __func__);
} else {
MOZ_ASSERT(config->IsVideo());
nsAutoCString reason;
bool powerEfficient = true;
bool smooth = true;
if (config->GetAsVideoInfo()->mImage.height > 480) {
// Assume that we can do stuff at 480p or less in
// a power efficient manner and smoothly. If
// greater than 480p we assume that if the video
// decoding is hardware accelerated it will be
// smooth and power efficient, otherwise we use
// the benchmark to estimate
powerEfficient =
decoder->IsHardwareAccelerated(reason);
if (!powerEfficient &&
VPXDecoder::IsVP9(config->mMimeType)) {
smooth = VP9Benchmark::IsVP9DecodeFast(
true /* default */);
uint32_t fps =
VP9Benchmark::MediaBenchmarkVp9Fps();
if (!smooth && fps > 0) {
// The VP9 estimizer decode a 1280x720 video.
// Let's adjust the result for the resolution
// and frame rate of what we actually want. If
// the result is twice that we need we assume
// it will be smooth.
const auto& videoConfig =
*config->GetAsVideoInfo();
double needed = ((1280.0 * 720.0) /
(videoConfig.mImage.width *
videoConfig.mImage.height) *
fps) /
frameRate;
smooth = needed > 2;
}
}
}
p = CapabilitiesPromise::CreateAndResolve(
MediaCapabilitiesInfo(true /* supported */,
smooth, powerEfficient),
__func__);
}
MOZ_ASSERT(p.get(), "the promise has been created");
// Let's keep alive the decoder and the config object
// until the decoder has shutdown.
decoder->Shutdown()->Then(
taskQueue, __func__,
[taskQueue, decoder, config = std::move(config)](
const ShutdownPromise::ResolveOrRejectValue&
aValue) {});
return p;
});
return p;
});
}));
}
auto holder = MakeRefPtr<
DOMMozPromiseRequestHolder<CapabilitiesPromise::AllPromiseType>>(mParent);
RefPtr<nsISerialEventTarget> targetThread;
RefPtr<StrongWorkerRef> workerRef;
if (NS_IsMainThread()) {
targetThread = mParent->AbstractMainThreadFor(TaskCategory::Other);
} else {
WorkerPrivate* wp = GetCurrentThreadWorkerPrivate();
MOZ_ASSERT(wp, "Must be called from a worker thread");
targetThread = wp->HybridEventTarget();
workerRef = StrongWorkerRef::Create(
wp, "MediaCapabilities", [holder, targetThread]() {
MOZ_ASSERT(targetThread->IsOnCurrentThread());
holder->DisconnectIfExists();
});
if (NS_WARN_IF(!workerRef)) {
// The worker is shutting down.
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
}
MOZ_ASSERT(targetThread);
// this is only captured for use with the LOG macro.
RefPtr<MediaCapabilities> self = this;
CapabilitiesPromise::All(targetThread, promises)
->Then(targetThread, __func__,
[promise, tracks = std::move(tracks), workerRef, holder,
aConfiguration, self,
this](CapabilitiesPromise::AllPromiseType::ResolveOrRejectValue&&
aValue) {
holder->Complete();
if (aValue.IsReject()) {
auto info = MakeUnique<MediaCapabilitiesInfo>(
false /* supported */, false /* smooth */,
false /* power efficient */);
LOG("%s -> %s",
MediaDecodingConfigurationToStr(aConfiguration).get(),
MediaCapabilitiesInfoToStr(info.get()).get());
promise->MaybeResolve(std::move(info));
return;
}
bool powerEfficient = true;
bool smooth = true;
for (auto&& capability : aValue.ResolveValue()) {
smooth &= capability.Smooth();
powerEfficient &= capability.PowerEfficient();
}
auto info = MakeUnique<MediaCapabilitiesInfo>(
true /* supported */, smooth, powerEfficient);
LOG("%s -> %s",
MediaDecodingConfigurationToStr(aConfiguration).get(),
MediaCapabilitiesInfoToStr(info.get()).get());
promise->MaybeResolve(std::move(info));
})
->Track(*holder);
return promise.forget();
}
already_AddRefed<Promise> MediaCapabilities::EncodingInfo(
const MediaEncodingConfiguration& aConfiguration, ErrorResult& aRv) {
RefPtr<Promise> promise = Promise::Create(mParent, aRv);
if (aRv.Failed()) {
return nullptr;
}
// If configuration is not a valid MediaConfiguration, return a Promise
// rejected with a TypeError.
if (!aConfiguration.mVideo.WasPassed() &&
!aConfiguration.mAudio.WasPassed()) {
aRv.ThrowTypeError<MSG_MISSING_REQUIRED_DICTIONARY_MEMBER>(
NS_LITERAL_STRING("'audio' or 'video'"));
return nullptr;
}
bool supported = true;
// If configuration.video is present and is not a valid video configuration,
// return a Promise rejected with a TypeError.
if (aConfiguration.mVideo.WasPassed()) {
if (!CheckVideoConfiguration(aConfiguration.mVideo.Value())) {
aRv.ThrowTypeError<MSG_INVALID_MEDIA_VIDEO_CONFIGURATION>();
return nullptr;
}
// We have a video configuration and it is valid. Check if it is supported.
supported &=
CheckTypeForEncoder(aConfiguration.mVideo.Value().mContentType);
}
if (aConfiguration.mAudio.WasPassed()) {
if (!CheckAudioConfiguration(aConfiguration.mAudio.Value())) {
aRv.ThrowTypeError<MSG_INVALID_MEDIA_AUDIO_CONFIGURATION>();
return nullptr;
}
// We have an audio configuration and it is valid. Check if it is supported.
supported &=
CheckTypeForEncoder(aConfiguration.mAudio.Value().mContentType);
}
auto info = MakeUnique<MediaCapabilitiesInfo>(supported, supported, false);
promise->MaybeResolve(std::move(info));
return promise.forget();
}
Maybe<MediaContainerType> MediaCapabilities::CheckVideoConfiguration(
const VideoConfiguration& aConfig) const {
Maybe<MediaExtendedMIMEType> container = MakeMediaExtendedMIMEType(aConfig);
if (!container) {
return Nothing();
}
// A valid video MIME type is a string that is a valid media MIME type and for
// which the type per [RFC7231] is either video or application.
if (!container->Type().HasVideoMajorType() &&
!container->Type().HasApplicationMajorType()) {
return Nothing();
}
// If the MIME type does not imply a codec, the string MUST also have one and
// only one parameter that is named codecs with a value describing a single
// media codec. Otherwise, it MUST contain no parameters.
// TODO (nsIMOMEHeaderParam doesn't provide backend to count number of
// parameters)
return Some(MediaContainerType(std::move(*container)));
}
Maybe<MediaContainerType> MediaCapabilities::CheckAudioConfiguration(
const AudioConfiguration& aConfig) const {
Maybe<MediaExtendedMIMEType> container = MakeMediaExtendedMIMEType(aConfig);
if (!container) {
return Nothing();
}
// A valid audio MIME type is a string that is valid media MIME type and for
// which the type per [RFC7231] is either audio or application.
if (!container->Type().HasAudioMajorType() &&
!container->Type().HasApplicationMajorType()) {
return Nothing();
}
// If the MIME type does not imply a codec, the string MUST also have one and
// only one parameter that is named codecs with a value describing a single
// media codec. Otherwise, it MUST contain no parameters.
// TODO (nsIMOMEHeaderParam doesn't provide backend to count number of
// parameters)
return Some(MediaContainerType(std::move(*container)));
}
bool MediaCapabilities::CheckTypeForMediaSource(const nsAString& aType) {
return NS_SUCCEEDED(MediaSource::IsTypeSupported(
aType, nullptr /* DecoderDoctorDiagnostics */));
}
bool MediaCapabilities::CheckTypeForFile(const nsAString& aType) {
Maybe<MediaContainerType> containerType = MakeMediaContainerType(aType);
if (!containerType) {
return false;
}
return DecoderTraits::CanHandleContainerType(
*containerType, nullptr /* DecoderDoctorDiagnostics */) !=
CANPLAY_NO;
}
bool MediaCapabilities::CheckTypeForEncoder(const nsAString& aType) {
return MediaRecorder::IsTypeSupported(aType);
}
already_AddRefed<layers::KnowsCompositor> MediaCapabilities::GetCompositor() {
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(GetParentObject());
if (NS_WARN_IF(!window)) {
return nullptr;
}
nsCOMPtr<Document> doc = window->GetExtantDoc();
if (NS_WARN_IF(!doc)) {
return nullptr;
}
RefPtr<layers::LayerManager> layerManager =
nsContentUtils::LayerManagerForDocument(doc);
if (NS_WARN_IF(!layerManager)) {
return nullptr;
}
RefPtr<layers::KnowsCompositor> knows = layerManager->AsKnowsCompositor();
if (NS_WARN_IF(!knows)) {
return nullptr;
}
return knows->GetForMedia().forget();
}
bool MediaCapabilities::Enabled(JSContext* aCx, JSObject* aGlobal) {
return StaticPrefs::media_media_capabilities_enabled();
}
JSObject* MediaCapabilities::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) {
return MediaCapabilities_Binding::Wrap(aCx, this, aGivenProto);
}
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(MediaCapabilities)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(MediaCapabilities)
NS_IMPL_CYCLE_COLLECTING_RELEASE(MediaCapabilities)
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(MediaCapabilities, mParent)
// MediaCapabilitiesInfo
bool MediaCapabilitiesInfo::WrapObject(
JSContext* aCx, JS::Handle<JSObject*> aGivenProto,
JS::MutableHandle<JSObject*> aReflector) {
return MediaCapabilitiesInfo_Binding::Wrap(aCx, this, aGivenProto,
aReflector);
}
} // namespace dom
} // namespace mozilla
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