gecko/dom/fm/FMRadio.cpp
2013-08-13 12:46:47 -04:00

265 lines
7.1 KiB
C++

/* 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/Hal.h"
#include "mozilla/HalTypes.h"
#include "mozilla/Preferences.h"
#include "nsIAudioManager.h"
#include "FMRadio.h"
#include "nsDOMEvent.h"
#include "nsDOMClassInfo.h"
#include "nsFMRadioSettings.h"
#include "nsCOMPtr.h"
#undef LOG
#if defined(MOZ_WIDGET_GONK)
#include <android/log.h>
#define LOG(args...) __android_log_print(ANDROID_LOG_INFO, "FMRadio" , ## args)
#else
#define LOG(args...)
#endif
// 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.fm.antenna.internal"
#define RADIO_SEEK_COMPLETE_EVENT_NAME NS_LITERAL_STRING("seekcomplete")
#define RADIO_DISABLED_EVENT_NAME NS_LITERAL_STRING("disabled")
#define RADIO_ENABLED_EVENT_NAME NS_LITERAL_STRING("enabled")
#define ANTENNA_STATE_CHANGED_EVENT_NAME NS_LITERAL_STRING("antennastatechange")
#define NS_AUDIOMANAGER_CONTRACTID "@mozilla.org/telephony/audiomanager;1"
using namespace mozilla::dom::fm;
using namespace mozilla::hal;
using mozilla::Preferences;
FMRadio::FMRadio()
: mHeadphoneState(SWITCH_STATE_OFF)
, mHasInternalAntenna(false)
, mHidden(true)
{
LOG("FMRadio is initialized.");
mHasInternalAntenna = Preferences::GetBool(DOM_FM_ANTENNA_INTERNAL_PREF,
/* default = */ false);
if (mHasInternalAntenna) {
LOG("We have an internal antenna.");
} else {
RegisterSwitchObserver(SWITCH_HEADPHONES, this);
mHeadphoneState = GetCurrentSwitchState(SWITCH_HEADPHONES);
}
RegisterFMRadioObserver(this);
}
FMRadio::~FMRadio()
{
UnregisterFMRadioObserver(this);
if (!mHasInternalAntenna) {
UnregisterSwitchObserver(SWITCH_HEADPHONES, this);
}
}
DOMCI_DATA(FMRadio, FMRadio)
NS_INTERFACE_MAP_BEGIN(FMRadio)
NS_INTERFACE_MAP_ENTRY(nsIFMRadio)
NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(FMRadio)
NS_INTERFACE_MAP_END_INHERITING(nsDOMEventTargetHelper)
NS_IMPL_EVENT_HANDLER(FMRadio, seekcomplete)
NS_IMPL_EVENT_HANDLER(FMRadio, disabled)
NS_IMPL_EVENT_HANDLER(FMRadio, enabled)
NS_IMPL_EVENT_HANDLER(FMRadio, antennastatechange)
NS_IMPL_ADDREF_INHERITED(FMRadio, nsDOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(FMRadio, nsDOMEventTargetHelper)
/* readonly attribute boolean isAntennaAvailable; */
NS_IMETHODIMP FMRadio::GetIsAntennaAvailable(bool *aIsAvailable)
{
if (mHasInternalAntenna) {
*aIsAvailable = true;
} else {
*aIsAvailable = mHeadphoneState != SWITCH_STATE_OFF;
}
return NS_OK;
}
/* readonly attribute long frequency; */
NS_IMETHODIMP FMRadio::GetFrequency(int32_t *aFrequency)
{
*aFrequency = GetFMRadioFrequency();
return NS_OK;
}
/* readonly attribute blean enabled; */
NS_IMETHODIMP FMRadio::GetEnabled(bool *aEnabled)
{
*aEnabled = IsFMRadioOn();
return NS_OK;
}
/* void enable (in nsIFMRadioSettings settings); */
NS_IMETHODIMP FMRadio::Enable(nsIFMRadioSettings *settings)
{
hal::FMRadioSettings info;
int32_t upperLimit, lowerLimit, channelWidth;
if (!mAudioChannelAgent) {
nsresult rv;
mAudioChannelAgent = do_CreateInstance("@mozilla.org/audiochannelagent;1", &rv);
if (!mAudioChannelAgent) {
return NS_ERROR_FAILURE;
}
mAudioChannelAgent->Init(AUDIO_CHANNEL_CONTENT, this);
}
bool canPlay;
mAudioChannelAgent->SetVisibilityState(!mHidden);
mAudioChannelAgent->StartPlaying(&canPlay);
settings->GetUpperLimit(&upperLimit);
settings->GetLowerLimit(&lowerLimit);
settings->GetChannelWidth(&channelWidth);
info.upperLimit() = upperLimit;
info.lowerLimit() = lowerLimit;
info.spaceType() = channelWidth;
EnableFMRadio(info);
nsCOMPtr<nsIAudioManager> audioManager =
do_GetService(NS_AUDIOMANAGER_CONTRACTID);
NS_ENSURE_TRUE(audioManager, NS_OK);
audioManager->SetFmRadioAudioEnabled(true);
// We enable the hardware, but mute the audio stream, in order to
// simplify state handling. This is simpler but worse for battery
// life; followup is bug 820282.
// Note: To adjust FM volume is only available after setting up
// routing patch.
CanPlayChanged(canPlay);
return NS_OK;
}
/* void disableRadio (); */
NS_IMETHODIMP FMRadio::Disable()
{
// Fix Bug 796733.
// DisableFMRadio should be called before SetFmRadioAudioEnabled to prevent
// the annoying beep sound.
DisableFMRadio();
nsCOMPtr<nsIAudioManager> audioManager =
do_GetService(NS_AUDIOMANAGER_CONTRACTID);
NS_ENSURE_TRUE(audioManager, NS_OK);
audioManager->SetFmRadioAudioEnabled(false);
if (mAudioChannelAgent) {
mAudioChannelAgent->StopPlaying();
mAudioChannelAgent = nullptr;
}
return NS_OK;
}
/* void cancelSeek */
NS_IMETHODIMP FMRadio::CancelSeek()
{
CancelFMRadioSeek();
return NS_OK;
}
/* void seek (in long direction); */
NS_IMETHODIMP FMRadio::Seek(int32_t direction)
{
if (direction == (int)FM_RADIO_SEEK_DIRECTION_UP) {
FMRadioSeek(FM_RADIO_SEEK_DIRECTION_UP);
} else {
FMRadioSeek(FM_RADIO_SEEK_DIRECTION_DOWN);
}
return NS_OK;
}
/* nsIFMRadioSettings getSettings (); */
NS_IMETHODIMP FMRadio::GetSettings(nsIFMRadioSettings * *_retval)
{
hal::FMRadioSettings settings;
GetFMRadioSettings(&settings);
nsCOMPtr<nsIFMRadioSettings> radioSettings(new nsFMRadioSettings(
settings.upperLimit(),
settings.lowerLimit(),
settings.spaceType()));
radioSettings.forget(_retval);
return NS_OK;
}
/* void setFrequency (in long frequency); */
NS_IMETHODIMP FMRadio::SetFrequency(int32_t frequency)
{
SetFMRadioFrequency(frequency);
return NS_OK;
}
NS_IMETHODIMP FMRadio::UpdateVisible(bool aVisible)
{
mHidden = !aVisible;
if (mAudioChannelAgent) {
mAudioChannelAgent->SetVisibilityState(!mHidden);
}
return NS_OK;
}
void FMRadio::Notify(const SwitchEvent& aEvent)
{
if (mHeadphoneState != aEvent.status()) {
LOG("Antenna state is changed!");
mHeadphoneState = aEvent.status();
DispatchTrustedEvent(ANTENNA_STATE_CHANGED_EVENT_NAME);
}
}
void FMRadio::Notify(const FMRadioOperationInformation& info)
{
switch (info.operation())
{
case FM_RADIO_OPERATION_ENABLE:
DispatchTrustedEvent(RADIO_ENABLED_EVENT_NAME);
break;
case FM_RADIO_OPERATION_DISABLE:
DispatchTrustedEvent(RADIO_DISABLED_EVENT_NAME);
break;
case FM_RADIO_OPERATION_SEEK:
DispatchTrustedEvent(RADIO_SEEK_COMPLETE_EVENT_NAME);
break;
default:
MOZ_CRASH();
}
}
/* void canPlayChanged (in boolean canPlay); */
NS_IMETHODIMP FMRadio::CanPlayChanged(bool canPlay)
{
nsCOMPtr<nsIAudioManager> audioManager =
do_GetService(NS_AUDIOMANAGER_CONTRACTID);
NS_ENSURE_TRUE(audioManager, NS_OK);
bool AudioEnabled;
audioManager->GetFmRadioAudioEnabled(&AudioEnabled);
if (AudioEnabled == canPlay) {
return NS_OK;
}
/* mute fm first, it should be better to stop&resume fm */
audioManager->SetFmRadioAudioEnabled(canPlay);
return NS_OK;
}