gecko/dom/fmradio/FMRadio.cpp

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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 "mozilla/dom/FMRadio.h"
#include "nsContentUtils.h"
#include "mozilla/Hal.h"
#include "mozilla/HalTypes.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/FMRadioBinding.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/PFMRadioChild.h"
#include "mozilla/dom/FMRadioService.h"
#include "DOMRequest.h"
#include "nsDOMClassInfo.h"
#include "nsIDocShell.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIAudioManager.h"
#undef LOG
#define LOG(args...) FM_LOG("FMRadio", args)
// The pref indicates if the device has an internal antenna.
// If the pref is true, the antanna will be always available.
#define DOM_FM_ANTENNA_INTERNAL_PREF "dom.fmradio.antenna.internal"
using namespace mozilla::hal;
using mozilla::Preferences;
BEGIN_FMRADIO_NAMESPACE
class FMRadioRequest MOZ_FINAL : public FMRadioReplyRunnable
, public DOMRequest
{
public:
NS_DECL_ISUPPORTS_INHERITED
FMRadioRequest(nsPIDOMWindow* aWindow, FMRadio* aFMRadio)
: DOMRequest(aWindow)
, mType(FMRadioRequestArgs::T__None)
{
// |FMRadio| inherits from |nsIDOMEventTarget| and |nsISupportsWeakReference|
// which both inherits from nsISupports, so |nsISupports| is an ambiguous
// base of |FMRadio|, we have to cast |aFMRadio| to one of the base classes.
mFMRadio = do_GetWeakReference(static_cast<nsIDOMEventTarget*>(aFMRadio));
}
FMRadioRequest(nsPIDOMWindow* aWindow, FMRadio* aFMRadio,
FMRadioRequestArgs::Type aType)
: DOMRequest(aWindow)
{
MOZ_ASSERT(aType >= FMRadioRequestArgs::T__None &&
aType <= FMRadioRequestArgs::T__Last,
"Wrong FMRadioRequestArgs in FMRadioRequest");
mFMRadio = do_GetWeakReference(static_cast<nsIDOMEventTarget*>(aFMRadio));
mType = aType;
}
~FMRadioRequest() { }
NS_IMETHODIMP
Run()
{
MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!");
nsCOMPtr<nsIDOMEventTarget> target = do_QueryReferent(mFMRadio);
if (!target) {
return NS_OK;
}
FMRadio* fmRadio = static_cast<FMRadio*>(
static_cast<nsIDOMEventTarget*>(target));
if (fmRadio->mIsShutdown) {
return NS_OK;
}
switch (mResponseType.type()) {
case FMRadioResponseType::TErrorResponse:
FireError(mResponseType.get_ErrorResponse().error());
break;
case FMRadioResponseType::TSuccessResponse:
if (mType == FMRadioRequestArgs::TEnableRequestArgs) {
fmRadio->EnableAudioChannelAgent();
}
FireSuccess(JS::UndefinedHandleValue);
break;
default:
MOZ_CRASH();
}
return NS_OK;
}
private:
FMRadioRequestArgs::Type mType;
nsWeakPtr mFMRadio;
};
NS_IMPL_ISUPPORTS_INHERITED0(FMRadioRequest, DOMRequest)
FMRadio::FMRadio()
: mHeadphoneState(SWITCH_STATE_OFF)
, mAudioChannelAgentEnabled(false)
, mHasInternalAntenna(false)
, mIsShutdown(false)
{
LOG("FMRadio is initialized.");
SetIsDOMBinding();
}
FMRadio::~FMRadio()
{
}
void
FMRadio::Init(nsPIDOMWindow *aWindow)
{
BindToOwner(aWindow);
IFMRadioService::Singleton()->AddObserver(this);
mHasInternalAntenna = Preferences::GetBool(DOM_FM_ANTENNA_INTERNAL_PREF,
/* default = */ false);
if (mHasInternalAntenna) {
LOG("We have an internal antenna.");
} else {
mHeadphoneState = GetCurrentSwitchState(SWITCH_HEADPHONES);
RegisterSwitchObserver(SWITCH_HEADPHONES, this);
}
nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(GetOwner());
NS_ENSURE_TRUE_VOID(target);
target->AddSystemEventListener(NS_LITERAL_STRING("visibilitychange"), this,
/* useCapture = */ true,
/* wantsUntrusted = */ false);
// All of the codes below are for AudioChannel. We can directly return here
// if preferences doesn't enable AudioChannelService.
NS_ENSURE_TRUE_VOID(Preferences::GetBool("media.useAudioChannelService"));
nsCOMPtr<nsIAudioChannelAgent> audioChannelAgent =
do_CreateInstance("@mozilla.org/audiochannelagent;1");
NS_ENSURE_TRUE_VOID(audioChannelAgent);
audioChannelAgent->InitWithWeakCallback(
nsIAudioChannelAgent::AUDIO_AGENT_CHANNEL_CONTENT,
this);
nsCOMPtr<nsIDocShell> docshell = do_GetInterface(GetOwner());
NS_ENSURE_TRUE_VOID(docshell);
bool isActive = false;
docshell->GetIsActive(&isActive);
audioChannelAgent->SetVisibilityState(isActive);
// Once all necessary resources are got successfully, we just enabled
// mAudioChannelAgent.
mAudioChannelAgent = audioChannelAgent;
}
void
FMRadio::Shutdown()
{
IFMRadioService::Singleton()->RemoveObserver(this);
if (!mHasInternalAntenna) {
UnregisterSwitchObserver(SWITCH_HEADPHONES, this);
}
nsCOMPtr<nsIDOMEventTarget> target = do_QueryInterface(GetOwner());
NS_ENSURE_TRUE_VOID(target);
target->RemoveSystemEventListener(NS_LITERAL_STRING("visibilitychange"), this,
/* useCapture = */ true);
mIsShutdown = true;
}
JSObject*
FMRadio::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aScope)
{
return FMRadioBinding::Wrap(aCx, aScope, this);
}
void
FMRadio::Notify(const SwitchEvent& aEvent)
{
MOZ_ASSERT(!mHasInternalAntenna);
if (mHeadphoneState != aEvent.status()) {
mHeadphoneState = aEvent.status();
DispatchTrustedEvent(NS_LITERAL_STRING("antennaavailablechange"));
}
}
void
FMRadio::Notify(const FMRadioEventType& aType)
{
switch (aType) {
case FrequencyChanged:
DispatchTrustedEvent(NS_LITERAL_STRING("frequencychange"));
break;
case EnabledChanged:
if (Enabled()) {
DispatchTrustedEvent(NS_LITERAL_STRING("enabled"));
} else {
if (mAudioChannelAgentEnabled) {
mAudioChannelAgent->StopPlaying();
mAudioChannelAgentEnabled = false;
}
DispatchTrustedEvent(NS_LITERAL_STRING("disabled"));
}
break;
default:
MOZ_CRASH();
}
}
/* static */
bool
FMRadio::Enabled()
{
return IFMRadioService::Singleton()->IsEnabled();
}
bool
FMRadio::AntennaAvailable() const
{
return mHasInternalAntenna ? true : (mHeadphoneState != SWITCH_STATE_OFF) &&
(mHeadphoneState != SWITCH_STATE_UNKNOWN);
}
Nullable<double>
FMRadio::GetFrequency() const
{
return Enabled() ?
Nullable<double>(IFMRadioService::Singleton()->GetFrequency()) :
Nullable<double>();
}
double
FMRadio::FrequencyUpperBound() const
{
return IFMRadioService::Singleton()->GetFrequencyUpperBound();
}
double
FMRadio::FrequencyLowerBound() const
{
return IFMRadioService::Singleton()->GetFrequencyLowerBound();
}
double
FMRadio::ChannelWidth() const
{
return IFMRadioService::Singleton()->GetChannelWidth();
}
already_AddRefed<DOMRequest>
FMRadio::Enable(double aFrequency)
{
nsCOMPtr<nsPIDOMWindow> win = GetOwner();
if (!win) {
return nullptr;
}
nsRefPtr<FMRadioRequest> r =
new FMRadioRequest(win, this, FMRadioRequestArgs::TEnableRequestArgs);
IFMRadioService::Singleton()->Enable(aFrequency, r);
return r.forget();
}
already_AddRefed<DOMRequest>
FMRadio::Disable()
{
nsCOMPtr<nsPIDOMWindow> win = GetOwner();
if (!win) {
return nullptr;
}
nsRefPtr<FMRadioRequest> r = new FMRadioRequest(win, this);
IFMRadioService::Singleton()->Disable(r);
return r.forget();
}
already_AddRefed<DOMRequest>
FMRadio::SetFrequency(double aFrequency)
{
nsCOMPtr<nsPIDOMWindow> win = GetOwner();
if (!win) {
return nullptr;
}
nsRefPtr<FMRadioRequest> r = new FMRadioRequest(win, this);
IFMRadioService::Singleton()->SetFrequency(aFrequency, r);
return r.forget();
}
already_AddRefed<DOMRequest>
FMRadio::SeekUp()
{
nsCOMPtr<nsPIDOMWindow> win = GetOwner();
if (!win) {
return nullptr;
}
nsRefPtr<FMRadioRequest> r = new FMRadioRequest(win, this);
IFMRadioService::Singleton()->Seek(FM_RADIO_SEEK_DIRECTION_UP, r);
return r.forget();
}
already_AddRefed<DOMRequest>
FMRadio::SeekDown()
{
nsCOMPtr<nsPIDOMWindow> win = GetOwner();
if (!win) {
return nullptr;
}
nsRefPtr<FMRadioRequest> r = new FMRadioRequest(win, this);
IFMRadioService::Singleton()->Seek(FM_RADIO_SEEK_DIRECTION_DOWN, r);
return r.forget();
}
already_AddRefed<DOMRequest>
FMRadio::CancelSeek()
{
nsCOMPtr<nsPIDOMWindow> win = GetOwner();
if (!win) {
return nullptr;
}
nsRefPtr<FMRadioRequest> r = new FMRadioRequest(win, this);
IFMRadioService::Singleton()->CancelSeek(r);
return r.forget();
}
NS_IMETHODIMP
FMRadio::HandleEvent(nsIDOMEvent* aEvent)
{
nsAutoString type;
aEvent->GetType(type);
if (!type.EqualsLiteral("visibilitychange")) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIDocShell> docshell = do_GetInterface(GetOwner());
NS_ENSURE_TRUE(docshell, NS_ERROR_FAILURE);
bool isActive = false;
docshell->GetIsActive(&isActive);
mAudioChannelAgent->SetVisibilityState(isActive);
return NS_OK;
}
void
FMRadio::EnableAudioChannelAgent()
{
NS_ENSURE_TRUE_VOID(mAudioChannelAgent);
int32_t playingState = 0;
mAudioChannelAgent->StartPlaying(&playingState);
SetCanPlay(playingState == AudioChannelState::AUDIO_CHANNEL_STATE_NORMAL);
mAudioChannelAgentEnabled = true;
}
NS_IMETHODIMP
FMRadio::CanPlayChanged(int32_t aCanPlay)
{
SetCanPlay(aCanPlay == AudioChannelState::AUDIO_CHANNEL_STATE_NORMAL);
return NS_OK;
}
void
FMRadio::SetCanPlay(bool aCanPlay)
{
IFMRadioService::Singleton()->EnableAudio(aCanPlay);
}
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(FMRadio)
NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
NS_INTERFACE_MAP_ENTRY(nsIAudioChannelAgentCallback)
NS_INTERFACE_MAP_ENTRY(nsIDOMEventListener)
NS_INTERFACE_MAP_END_INHERITING(nsDOMEventTargetHelper)
NS_IMPL_ADDREF_INHERITED(FMRadio, nsDOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(FMRadio, nsDOMEventTargetHelper)
END_FMRADIO_NAMESPACE