gecko-dev/dom/audiochannel/AudioChannelAgent.cpp

171 строка
5.5 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 "AudioChannelAgent.h"
#include "AudioChannelCommon.h"
#include "AudioChannelService.h"
using namespace mozilla::dom;
NS_IMPL_CYCLE_COLLECTION_1(AudioChannelAgent, mCallback)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(AudioChannelAgent)
NS_INTERFACE_MAP_ENTRY(nsIAudioChannelAgent)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(AudioChannelAgent)
NS_IMPL_CYCLE_COLLECTING_RELEASE(AudioChannelAgent)
AudioChannelAgent::AudioChannelAgent()
: mAudioChannelType(AUDIO_AGENT_CHANNEL_ERROR)
, mIsRegToService(false)
, mVisible(true)
, mWithVideo(false)
{
}
AudioChannelAgent::~AudioChannelAgent()
{
if (mIsRegToService) {
StopPlaying();
}
}
/* readonly attribute long audioChannelType; */
NS_IMETHODIMP AudioChannelAgent::GetAudioChannelType(int32_t *aAudioChannelType)
{
*aAudioChannelType = mAudioChannelType;
return NS_OK;
}
/* boolean init (in long channelType, in nsIAudioChannelAgentCallback callback); */
NS_IMETHODIMP AudioChannelAgent::Init(int32_t channelType, nsIAudioChannelAgentCallback *callback)
{
return InitInternal(channelType, callback, /* useWeakRef = */ false);
}
/* boolean initWithWeakCallback (in long channelType,
* in nsIAudioChannelAgentCallback callback); */
NS_IMETHODIMP
AudioChannelAgent::InitWithWeakCallback(int32_t channelType,
nsIAudioChannelAgentCallback *callback)
{
return InitInternal(channelType, callback, /* useWeakRef = */ true);
}
NS_IMETHODIMP
AudioChannelAgent::InitWithVideo(int32_t channelType,
nsIAudioChannelAgentCallback *callback,
bool aUseWeakRef)
{
return InitInternal(channelType, callback, aUseWeakRef, true);
}
nsresult
AudioChannelAgent::InitInternal(int32_t aChannelType,
nsIAudioChannelAgentCallback *aCallback,
bool aUseWeakRef, bool aWithVideo)
{
// We syncd the enum of channel type between nsIAudioChannelAgent.idl and
// AudioChannelCommon.h the same.
static_assert(static_cast<AudioChannelType>(AUDIO_AGENT_CHANNEL_NORMAL) ==
AUDIO_CHANNEL_NORMAL &&
static_cast<AudioChannelType>(AUDIO_AGENT_CHANNEL_CONTENT) ==
AUDIO_CHANNEL_CONTENT &&
static_cast<AudioChannelType>(AUDIO_AGENT_CHANNEL_NOTIFICATION) ==
AUDIO_CHANNEL_NOTIFICATION &&
static_cast<AudioChannelType>(AUDIO_AGENT_CHANNEL_ALARM) ==
AUDIO_CHANNEL_ALARM &&
static_cast<AudioChannelType>(AUDIO_AGENT_CHANNEL_TELEPHONY) ==
AUDIO_CHANNEL_TELEPHONY &&
static_cast<AudioChannelType>(AUDIO_AGENT_CHANNEL_RINGER) ==
AUDIO_CHANNEL_RINGER &&
static_cast<AudioChannelType>(AUDIO_AGENT_CHANNEL_PUBLICNOTIFICATION) ==
AUDIO_CHANNEL_PUBLICNOTIFICATION,
"Enum of channel on nsIAudioChannelAgent.idl should be the same with AudioChannelCommon.h");
if (mAudioChannelType != AUDIO_AGENT_CHANNEL_ERROR ||
aChannelType > AUDIO_AGENT_CHANNEL_PUBLICNOTIFICATION ||
aChannelType < AUDIO_AGENT_CHANNEL_NORMAL) {
return NS_ERROR_FAILURE;
}
mAudioChannelType = aChannelType;
if (aUseWeakRef) {
mWeakCallback = do_GetWeakReference(aCallback);
} else {
mCallback = aCallback;
}
mWithVideo = aWithVideo;
return NS_OK;
}
/* boolean startPlaying (); */
NS_IMETHODIMP AudioChannelAgent::StartPlaying(int32_t *_retval)
{
AudioChannelService *service = AudioChannelService::GetAudioChannelService();
if (mAudioChannelType == AUDIO_AGENT_CHANNEL_ERROR ||
service == nullptr || mIsRegToService) {
return NS_ERROR_FAILURE;
}
service->RegisterAudioChannelAgent(this,
static_cast<AudioChannelType>(mAudioChannelType), mWithVideo);
*_retval = service->GetState(this, !mVisible);
mIsRegToService = true;
return NS_OK;
}
/* void stopPlaying (); */
NS_IMETHODIMP AudioChannelAgent::StopPlaying(void)
{
if (mAudioChannelType == AUDIO_AGENT_CHANNEL_ERROR ||
!mIsRegToService) {
return NS_ERROR_FAILURE;
}
AudioChannelService *service = AudioChannelService::GetAudioChannelService();
service->UnregisterAudioChannelAgent(this);
mIsRegToService = false;
return NS_OK;
}
/* void setVisibilityState (in boolean visible); */
NS_IMETHODIMP AudioChannelAgent::SetVisibilityState(bool visible)
{
bool oldVisibility = mVisible;
nsCOMPtr<nsIAudioChannelAgentCallback> callback = GetCallback();
mVisible = visible;
if (mIsRegToService && oldVisibility != mVisible && callback) {
AudioChannelService *service = AudioChannelService::GetAudioChannelService();
callback->CanPlayChanged(service->GetState(this, !mVisible));
}
return NS_OK;
}
void AudioChannelAgent::NotifyAudioChannelStateChanged()
{
nsCOMPtr<nsIAudioChannelAgentCallback> callback = GetCallback();
if (callback) {
AudioChannelService *service = AudioChannelService::GetAudioChannelService();
callback->CanPlayChanged(service->GetState(this, !mVisible));
}
}
already_AddRefed<nsIAudioChannelAgentCallback>
AudioChannelAgent::GetCallback()
{
nsCOMPtr<nsIAudioChannelAgentCallback> callback = mCallback;
if (!callback) {
callback = do_QueryReferent(mWeakCallback);
}
return callback.forget();
}