gecko-dev/dom/audiochannel/AudioChannelAgent.cpp

118 lines
3.9 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_ISUPPORTS1(AudioChannelAgent, nsIAudioChannelAgent)
AudioChannelAgent::AudioChannelAgent()
: mCallback(nullptr)
, mAudioChannelType(AUDIO_AGENT_CHANNEL_ERROR)
, mIsRegToService(false)
, mVisible(true)
{
}
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); */
NS_IMETHODIMP AudioChannelAgent::Init(int32_t channelType, nsIAudioChannelAgentCallback *callback)
{
// We syncd the enum of channel type between nsIAudioChannelAgent.idl and
// AudioChannelCommon.h the same.
MOZ_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 ||
channelType > AUDIO_AGENT_CHANNEL_PUBLICNOTIFICATION ||
channelType < AUDIO_AGENT_CHANNEL_NORMAL) {
return NS_ERROR_FAILURE;
}
mAudioChannelType = channelType;
mCallback = callback;
return NS_OK;
}
/* boolean startPlaying (); */
NS_IMETHODIMP AudioChannelAgent::StartPlaying(bool *_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));
*_retval = !service->GetMuted(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;
mVisible = visible;
if (mIsRegToService && oldVisibility != mVisible && mCallback != nullptr) {
AudioChannelService *service = AudioChannelService::GetAudioChannelService();
mCallback->CanPlayChanged(!service->GetMuted(this, !mVisible));
}
return NS_OK;
}
void AudioChannelAgent::NotifyAudioChannelStateChanged()
{
if (mCallback != nullptr) {
AudioChannelService *service = AudioChannelService::GetAudioChannelService();
mCallback->CanPlayChanged(!service->GetMuted(this, !mVisible));
}
}