OpenHarmony 3.2 Beta多媒體系列——音視頻播放框架

├── frameworks                        #框架代碼
│ ├── js
│ │ ├── player
│ ├── native
│ │ ├── player                    #native實(shí)現(xiàn)
│ └── videodisplaymanager         #顯示管理
│     ├── include
│     └── src
├── interfaces
│ ├── inner_api                     #內(nèi)部接口
│ │ └── native
│ └── kits                          #外部JS接口
├── sa_profile                        #服務(wù)配置文件
└── services
  ├── engine                        #engine代碼
  │ └── gstreamer
  ├── etc                           #服務(wù)配置文件
  ├── include                       #頭文件
  └── services
    ├── sa_media                  #media服務(wù)
    │ ├── client                #media客戶端
    │ ├── ipc                   #media ipc調(diào)用
    │ └── server                #media服務(wù)端
    ├── factory                   #engine工廠
    └── player                    #player服務(wù)
     ├── client                 #player客戶端
      ├── ipc                    #player ipc調(diào)用
└──server#player服務(wù)端

void PlayerDemo::RunCase(const string &path)
{
    player_ = OHOS::CreatePlayer();
    if (player_ == nullptr) {
        cout << "player_ is null" << endl;
        return;
    }
    RegisterTable();
    std::shared_ptr cb = std::make_shared();
    cb->SetBufferingOut(SelectBufferingOut());


    int32_t ret = player_->SetPlayerCallback(cb);
    if (ret != 0) {
        cout << "SetPlayerCallback fail" << endl;
    }
    if (SelectSource(path) != 0) {
        cout << "SetSource fail" << endl;
        return;
    }
    sptr producerSurface = nullptr;
    producerSurface = GetVideoSurface();
    if (producerSurface != nullptr) {
        ret = player_->SetVideoSurface(producerSurface);
        if (ret != 0) {
            cout << "SetVideoSurface fail" << endl;
        }
    }
    SetVideoScaleType();
    if (SelectRendererMode() != 0) {
        cout << "set renderer info fail" << endl;
    }
    ret = player_->PrepareAsync();
    if (ret !=  0) {
        cout << "PrepareAsync fail" << endl;
        return;
    }
    cout << "Enter your step:" << endl;
    DoNext();
}

void PlayerDemo::DoNext()
{
    std::string cmd;
    while (std::cin, cmd)) {
        auto iter = playerTable_.find(cmd);
        if (iter != playerTable_.end()) {
            auto func = iter->second;
            if (func() != 0) {
                cout << "Operation error" << endl;
            }
            if (cmd.find("stop") != std::npos && dataSrc_ != nullptr) {
                dataSrc_->Reset();
            }
            continue;
        } else if (cmd.find("quit") != std::npos || cmd == "q") {
            break;
        } else {
            DoCmd(cmd);
            continue;
        }
    }
}


void PlayerDemo::RegisterTable()
{
    (void)playerTable_.emplace("prepare", std::bind(&Player::Prepare, player_));
    (void)playerTable_.emplace("prepareasync", std::bind(&Player::PrepareAsync, player_));
    (void)playerTable_.emplace("", std::bind(&Player::Play, player_)); // ENTER -> play
    (void)playerTable_.emplace("play", std::bind(&Player::Play, player_));
    (void)playerTable_.emplace("pause", std::bind(&Player::Pause, player_));
    (void)playerTable_.emplace("stop", std::bind(&Player::Stop, player_));
    (void)playerTable_.emplace("reset", std::bind(&Player::Reset, player_));
    (void)playerTable_.emplace("release", std::bind(&Player::Release, player_));
    (void)playerTable_.emplace("isplaying", std::bind(&PlayerDemo::GetPlaying, this));
    (void)playerTable_.emplace("isloop", std::bind(&PlayerDemo::GetLooping, this));
    (void)playerTable_.emplace("speed", std::bind(&PlayerDemo::GetPlaybackSpeed, this));
}

int32_t PlayerImpl::Init()
{
    playerService_ = MediaServiceFactory::GetInstance().CreatePlayerService();
    CHECK_AND_RETURN_RET_LOG(playerService_ != nullptr, MSERR_UNKNOWN, "failed to create player service");
    return MSERR_OK;
}

std::shared_ptr MediaClient::CreatePlayerService()
{
    std::lock_guard lock(mutex_);
    if (!IsAlived()) {
        MEDIA_LOGE("media service does not exist.");
        return nullptr;
    }


    sptr object = mediaProxy_->GetSubSystemAbility(
        IStandardMediaService::MEDIA_PLAYER, listenerStub_->AsObject());
    CHECK_AND_RETURN_RET_LOG(object != nullptr, nullptr, "player proxy object is nullptr.");


    sptr playerProxy = iface_cast(object);
    CHECK_AND_RETURN_RET_LOG(playerProxy != nullptr, nullptr, "player proxy is nullptr.");


    std::shared_ptr player = PlayerClient::Create(playerProxy);
    CHECK_AND_RETURN_RET_LOG(player != nullptr, nullptr, "failed to create player client.");


    playerClientList_.push_back(player);
    return player;
}

int32_t PlayerImpl::Play()
{
    CHECK_AND_RETURN_RET_LOG(playerService_ != nullptr, MSERR_INVALID_OPERATION, "player service does not exist..");
    MEDIA_LOGW("KPI-TRACE: PlayerImpl Play in");
    return playerService_->Play();
}


int32_t PlayerImpl::Prepare()
{
    CHECK_AND_RETURN_RET_LOG(playerService_ != nullptr, MSERR_INVALID_OPERATION, "player service does not exist..");
    MEDIA_LOGW("KPI-TRACE: PlayerImpl Prepare in");
    return playerService_->Prepare();
}


int32_t PlayerImpl::PrepareAsync()
{
    CHECK_AND_RETURN_RET_LOG(playerService_ != nullptr, MSERR_INVALID_OPERATION, "player service does not exist..");
    MEDIA_LOGW("KPI-TRACE: PlayerImpl PrepareAsync in");
    return playerService_->PrepareAsync();
}

int32_t PlayerClient::Play()
{
    std::lock_guard lock(mutex_);
    CHECK_AND_RETURN_RET_LOG(playerProxy_ != nullptr, MSERR_NO_MEMORY, "player service does not exist..");
    return playerProxy_->Play();
}

int32_t PlayerServiceProxy::Play()
{
    MessageParcel data;
    MessageParcel reply;
    MessageOption option;


    if (!data.WriteInterfaceToken(PlayerServiceProxy::GetDescriptor())) {
        MEDIA_LOGE("Failed to write descriptor");
        return MSERR_UNKNOWN;
    }


    int error = Remote()->SendRequest(PLAY, data, reply, option);
    if (error != MSERR_OK) {
        MEDIA_LOGE("Play failed, error: %{public}d", error);
        return error;
    }
    return reply.ReadInt32();
}

int32_t PlayerServiceStub::Play()
{
    MediaTrace Trace("binder::Play");
    CHECK_AND_RETURN_RET_LOG(playerServer_ != nullptr, MSERR_NO_MEMORY, "player server is nullptr");
    return playerServer_->Play();
}

std::shared_ptr PlayerServer::Create()
{
    std::shared_ptr server = std::make_shared();
    CHECK_AND_RETURN_RET_LOG(server != nullptr, nullptr, "failed to new PlayerServer");


    (void)server->Init();
    return server;
}

int32_t PlayerServer::Play()
{
    std::lock_guard lock(mutex_);


    if (lastOpStatus_ == PLAYER_PREPARED || lastOpStatus_ == PLAYER_PLAYBACK_COMPLETE ||
        lastOpStatus_ == PLAYER_PAUSED) {
        return OnPlay();
    } else {
        MEDIA_LOGE("Can not Play, currentState is %{public}s", GetStatusDescription(lastOpStatus_).c_str());
        return MSERR_INVALID_OPERATION;
    }
}


int32_t PlayerServer::OnPlay()
{
    auto playingTask = std::make_shared>([this]() {
        MediaTrace::TraceBegin("PlayerServer::Play", FAKE_POINTER(this));
        auto currState = std::static_pointer_cast(GetCurrState());
        (void)currState->Play();
    });


    int ret = taskMgr_.LaunchTask(playingTask, PlayerServerTaskType::STATE_CHANGE);
    CHECK_AND_RETURN_RET_LOG(ret == MSERR_OK, ret, "Play failed");


    lastOpStatus_ = PLAYER_STARTED;
    return MSERR_OK;
}

int32_t PlayerServer::Play()
{
    return server_.HandlePlay();
}

int32_t PlayerServer::HandlePlay()
{
    int32_t ret = playerEngine_->Play();
    CHECK_AND_RETURN_RET_LOG(ret == MSERR_OK, MSERR_INVALID_OPERATION, "Engine Play Failed!");


    return MSERR_OK;
}