Add an initial Demxu client and Filter Client interface

Test: make libmedia_tv_tuner
Bug: 174095851

Change-Id: I8af379bf2810bee3dedf69ea0187766300b05370

media/jni/Android.bp

@@ -139,6 +139,8 @@ cc_library_shared {
     name: "libmedia_tv_tuner",
     srcs: [
         "android_media_tv_Tuner.cpp",
+        "tuner/DemuxClient.cpp",
+        "tuner/FilterClient.cpp",
         "tuner/FrontendClient.cpp",
         "tuner/TunerClient.cpp",
     ],

media/jni/tuner/DemuxClient.cpp

@@ -0,0 +1,123 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "FrontendClient"
+
+#include <android-base/logging.h>
+#include <utils/Log.h>
+
+#include "DemuxClient.h"
+
+using ::aidl::android::media::tv::tuner::TunerFrontendSettings;
+
+using ::android::hardware::tv::tuner::V1_0::Result;
+
+namespace android {
+
+/////////////// DemuxClient ///////////////////////
+
+// TODO: pending aidl interface
+DemuxClient::DemuxClient() {
+    //mTunerDemux = tunerDemux;
+}
+
+DemuxClient::~DemuxClient() {
+    //mTunerDemux = NULL;
+    mDemux = NULL;
+}
+
+// TODO: remove after migration to Tuner Service is done.
+void DemuxClient::setHidlDemux(sp<IDemux> demux) {
+    mDemux = demux;
+}
+
+Result DemuxClient::setFrontendDataSource(sp<FrontendClient> tunerFrontend) {
+    // TODO: pending aidl interface
+    /*if (mTunerDemux != NULL) {
+        // TODO: handle error message
+        mTunerDemux->setFrontendDataSource(tunerFrontend->getAidlFrontend());
+        return (int) Result::SUCCESS;
+    }*/
+
+    if (mDemux != NULL) {
+        Result res = mDemux->setFrontendDataSource(tunerFrontend->getId());
+        return res;
+    }
+
+    return Result::INVALID_STATE;
+}
+
+//FilterClient openFilter(int mainType, int subType, int bufferSize, FilterClientCallback cb);
+
+int DemuxClient::getAvSyncHwId(FilterClient /*tunerFilter*/) {
+    return 0;
+}
+
+long DemuxClient::getAvSyncTime(int avSyncHwId) {
+    // pending aidl interface
+
+    if (mDemux != NULL) {
+        uint64_t time;
+        Result res;
+        mDemux->getAvSyncTime(static_cast<uint32_t>(avSyncHwId),
+                [&](Result r, uint64_t ts) {
+                    res = r;
+                    time = ts;
+                });
+        if (res == Result::SUCCESS) {
+            return (long) time;
+        }
+    }
+
+    return -1;
+}
+
+//DvrClient openDvr(int dvbType, int bufferSize, DvrClientCallback cb);
+
+Result DemuxClient::connectCiCam(int ciCamId) {
+    // pending aidl interface
+
+    if (mDemux != NULL) {
+        return mDemux->connectCiCam(static_cast<uint32_t>(ciCamId));
+    }
+
+    return Result::INVALID_STATE;
+}
+
+Result DemuxClient::disconnectCiCam() {
+    // pending aidl interface
+
+    if (mDemux != NULL) {
+        return mDemux->disconnectCiCam();
+    }
+
+    return Result::INVALID_STATE;
+}
+
+Result DemuxClient::close() {
+    // pending aidl interface
+
+    if (mDemux != NULL) {
+        Result res = mDemux->close();
+        if (res == Result::SUCCESS) {
+            mDemux = NULL;
+        }
+        return res;
+    }
+
+    return Result::INVALID_STATE;
+}
+}  // namespace android

media/jni/tuner/DemuxClient.h

@@ -0,0 +1,104 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _ANDROID_MEDIA_TV_DEMUX_CLIENT_H_
+#define _ANDROID_MEDIA_TV_DEMUX_CLIENT_H_
+
+//#include <aidl/android/media/tv/tuner/ITunerDemux.h>
+#include <android/hardware/tv/tuner/1.0/IDemux.h>
+#include <android/hardware/tv/tuner/1.1/types.h>
+
+#include "FilterClient.h"
+#include "FrontendClient.h"
+
+//using ::aidl::android::media::tv::tuner::ITunerDemux;
+
+using ::android::hardware::tv::tuner::V1_0::IDemux;
+
+using namespace std;
+
+namespace android {
+
+struct DemuxClient : public RefBase {
+
+public:
+    DemuxClient();
+    ~DemuxClient();
+
+    // TODO: remove after migration to Tuner Service is done.
+    void setHidlDemux(sp<IDemux> demux);
+
+    /**
+     * Set a frontend resource as data input of the demux.
+     */
+    Result setFrontendDataSource(sp<FrontendClient> tunerFrontend);
+
+    /**
+     * Open a new filter client.
+     */
+    //FilterClient openFilter(int mainType, int subType, int bufferSize, FilterClientCallback cb);
+
+    // TODO: handle TimeFilterClient
+
+    /**
+     * Get hardware sync ID for audio and video.
+     */
+    int getAvSyncHwId(FilterClient tunerFilter);
+
+    /**
+     * Get current time stamp to use for A/V sync.
+     */
+    long getAvSyncTime(int avSyncHwId);
+
+    /**
+     * Open a DVR (Digital Video Record) client.
+     */
+    // TODO: handle DvrClient and callback
+    //DvrClient openDvr(int dvbType, int bufferSize, DvrClientCallback cb);  
+
+    /**
+     * Connect Conditional Access Modules (CAM) through Common Interface (CI).
+     */
+    Result connectCiCam(int ciCamId);
+
+    /**
+     * Disconnect Conditional Access Modules (CAM).
+     */
+    Result disconnectCiCam();
+
+    /**
+     * Release the Demux Client.
+     */
+    Result close();
+
+private:
+    /**
+     * An AIDL Tuner Demux Singleton assigned at the first time the Tuner Client
+     * opens a demux. Default null when demux is not opened.
+     */
+    // TODO: pending on aidl interface
+    //shared_ptr<ITunerDemux> mTunerDemux;
+
+    /**
+     * A Demux HAL interface that is ready before migrating to the TunerDemux.
+     * This is a temprary interface before Tuner Framework migrates to use TunerService.
+     * Default null when the HAL service does not exist.
+     */
+    sp<IDemux> mDemux;
+};
+}  // namespace android
+
+#endif  // _ANDROID_MEDIA_TV_DEMUX_CLIENT_H_

media/jni/tuner/FilterClient.cpp

@@ -0,0 +1,243 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "FrontendClient"
+
+#include <android-base/logging.h>
+#include <utils/Log.h>
+
+#include "FilterClient.h"
+
+using ::android::hardware::tv::tuner::V1_0::DemuxQueueNotifyBits;
+
+namespace android {
+
+//shared_ptr<ITunerFilter> FilterClient::mTunerFilter;
+sp<IFilter> FilterClient::mFilter;
+sp<::android::hardware::tv::tuner::V1_1::IFilter> FilterClient::mFilter_1_1;
+
+/////////////// FilterClient ///////////////////////
+
+// TODO: pending aidl interface
+// TODO: add filter callback
+FilterClient::FilterClient() {
+    //mTunerFilter = tunerFilter;
+}
+
+FilterClient::~FilterClient() {
+    //mTunerFilter = NULL;
+    mFilter = NULL;
+    mFilter_1_1 = NULL;
+}
+
+// TODO: remove after migration to Tuner Service is done.
+void FilterClient::setHidlFilter(sp<IFilter> filter) {
+    mFilter = filter;
+    mFilter_1_1 = ::android::hardware::tv::tuner::V1_1::IFilter::castFrom(mFilter);
+}
+
+//Result setCallback(FilterClientCallback filterClientCallback);
+
+int FilterClient::read(uint8_t* buffer, int size) {
+    // TODO: pending aidl interface
+
+    if (mFilter != NULL) {
+        Result res = getFilterMq();
+        if (res != Result::SUCCESS) {
+            return -1;
+        }
+        return copyData(buffer, size);
+    }
+
+    return -1;
+}
+
+Result FilterClient::configure(DemuxFilterSettings configure) {
+    // TODO: pending aidl interface
+
+    if (mFilter != NULL) {
+        return mFilter->configure(configure);
+    }
+
+    return Result::INVALID_STATE;
+}
+
+Result FilterClient::configureMonitorEvent(int monitorEventType) {
+    // TODO: pending aidl interface
+
+    if (mFilter_1_1 != NULL) {
+        return mFilter_1_1->configureMonitorEvent(monitorEventType);
+    }
+
+    return Result::INVALID_STATE;
+}
+
+Result FilterClient::configureIpFilterContextId(int cid) {
+    // TODO: pending aidl interface
+
+    if (mFilter_1_1 != NULL) {
+        return mFilter_1_1->configureIpCid(cid);
+    }
+
+    return Result::INVALID_STATE;
+}
+
+Result FilterClient::configureAvStreamType(AvStreamType avStreamType) {
+    // TODO: pending aidl interface
+
+    if (mFilter_1_1 != NULL) {
+        return mFilter_1_1->configureAvStreamType(avStreamType);
+    }
+
+    return Result::INVALID_STATE;
+}
+
+Result FilterClient::start() {
+    // TODO: pending aidl interface
+
+    if (mFilter != NULL) {
+        return mFilter->start();
+    }
+
+    return Result::INVALID_STATE;
+}
+
+Result FilterClient::stop() {
+    // TODO: pending aidl interface
+
+    if (mFilter != NULL) {
+        return mFilter->stop();
+    }
+
+    return Result::INVALID_STATE;
+}
+
+Result FilterClient::flush() {
+    // TODO: pending aidl interface
+
+    if (mFilter != NULL) {
+        return mFilter->flush();
+    }
+
+    return Result::INVALID_STATE;
+}
+
+Result FilterClient::getId(uint32_t& id) {
+    // TODO: pending aidl interface
+
+    if (mFilter != NULL) {
+        Result res;
+        mFilter->getId([&](Result r, uint32_t filterId) {
+            res = r;
+            id = filterId;
+        });
+        return res;
+    }
+
+    return Result::INVALID_STATE;
+}
+
+Result FilterClient::getId64Bit(uint64_t& id) {
+    // TODO: pending aidl interface
+
+    if (mFilter_1_1 != NULL) {
+        Result res;
+        mFilter_1_1->getId64Bit([&](Result r, uint64_t filterId) {
+            res = r;
+            id = filterId;
+        });
+        return res;
+    }
+
+    return Result::INVALID_STATE;
+}
+
+Result FilterClient::releaseAvHandle(native_handle_t* handle, uint64_t avDataId) {
+    // TODO: pending aidl interface
+
+    if (mFilter != NULL) {
+        return mFilter->releaseAvHandle(hidl_handle(handle), avDataId);
+    }
+
+    return Result::INVALID_STATE;
+}
+
+Result FilterClient::setDataSource(sp<FilterClient> filterClient){
+    // TODO: pending aidl interface
+
+    if (mFilter != NULL) {
+        sp<IFilter> sourceFilter = filterClient->getHalFilter();
+        if (sourceFilter == NULL) {
+            return Result::INVALID_ARGUMENT;
+        }
+        return mFilter->setDataSource(sourceFilter);
+    }
+
+    return Result::INVALID_STATE;
+}
+
+Result FilterClient::close() {
+    // TODO: pending aidl interface
+
+    if (mFilter != NULL) {
+        return mFilter->close();
+    }
+
+    return Result::INVALID_STATE;
+}
+
+/////////////// FilterClient Helper Methods ///////////////////////
+
+Result FilterClient::getFilterMq() {
+    if (mFilter == NULL) {
+        return Result::INVALID_STATE;
+    }
+
+    if (mFilterMQ != NULL) {
+        return Result::SUCCESS;
+    }
+
+    Result getQueueDescResult = Result::UNKNOWN_ERROR;
+    MQDescriptorSync<uint8_t> filterMQDesc;
+    mFilter->getQueueDesc(
+            [&](Result r, const MQDescriptorSync<uint8_t>& desc) {
+                filterMQDesc = desc;
+                getQueueDescResult = r;
+            });
+    if (getQueueDescResult == Result::SUCCESS) {
+        mFilterMQ = std::make_unique<MQ>(filterMQDesc, true);
+        EventFlag::createEventFlag(mFilterMQ->getEventFlagWord(), &mFilterMQEventFlag);
+    }
+    return getQueueDescResult;
+}
+
+int FilterClient::copyData(uint8_t* buffer, int size) {
+    if (mFilter == NULL || mFilterMQ == NULL || mFilterMQEventFlag == NULL) {
+        return -1;
+    }
+
+    int available = mFilterMQ->availableToRead();
+    size = min(size, available);
+
+    if (mFilterMQ->read(buffer, size)) {
+        mFilterMQEventFlag->wake(static_cast<uint32_t>(DemuxQueueNotifyBits::DATA_CONSUMED));
+    } else {
+        return -1;
+    }
+
+    return size;
+}
+}  // namespace android

media/jni/tuner/FilterClient.h

@@ -0,0 +1,166 @@
+/*
+ * Copyright 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _ANDROID_MEDIA_TV_FILTER_CLIENT_H_
+#define _ANDROID_MEDIA_TV_FILTER_CLIENT_H_
+
+//#include <aidl/android/media/tv/tuner/ITunerFilter.h>
+#include <android/hardware/tv/tuner/1.1/IFilter.h>
+#include <android/hardware/tv/tuner/1.1/types.h>
+#include <fmq/MessageQueue.h>
+
+//#include "FilterClientCallback.h"
+
+//using ::aidl::android::media::tv::tuner::ITunerFilter;
+
+using ::android::hardware::EventFlag;
+using ::android::hardware::MessageQueue;
+using ::android::hardware::MQDescriptorSync;
+using ::android::hardware::hidl_handle;
+using ::android::hardware::tv::tuner::V1_0::DemuxFilterSettings;
+using ::android::hardware::tv::tuner::V1_0::IFilter;
+using ::android::hardware::tv::tuner::V1_0::Result;
+using ::android::hardware::tv::tuner::V1_1::AvStreamType;
+
+using namespace std;
+
+using MQ = MessageQueue<uint8_t, kSynchronizedReadWrite>;
+
+namespace android {
+
+struct FilterClient : public RefBase {
+
+public:
+    // TODO: pending aidl interface
+    FilterClient();
+    ~FilterClient();
+
+    // TODO: remove after migration to Tuner Service is done.
+    void setHidlFilter(sp<IFilter> filter);
+
+    /**
+     * Set the filter client callback.
+     */
+    //Result setCallback(FilterClientCallback filterClientCallback);
+
+    /**
+     * Read size of data from filter FMQ into buffer.
+     *
+     * @return the actual reading size. -1 if failed to read.
+     */
+    int read(uint8_t* buffer, int size);
+
+    /**
+     * Configure the filter.
+     */
+    Result configure(DemuxFilterSettings configure);
+
+    /**
+     * Configure the monitor event of the Filter.
+     */
+    Result configureMonitorEvent(int monitorEventType);
+
+    /**
+     * Configure the context id of the IP Filter.
+     */
+    Result configureIpFilterContextId(int cid);
+
+    /**
+     * Configure the stream type of the media Filter.
+     */
+    Result configureAvStreamType(AvStreamType avStreamType);
+
+    /**
+     * Start the filter.
+     */
+    Result start();
+
+    /**
+     * Stop the filter.
+     */
+    Result stop();
+
+    /**
+     * Flush the filter.
+     */
+    Result flush();
+
+    /**
+     * Get the 32-bit filter Id.
+     */
+    Result getId(uint32_t& id);
+
+    /**
+     * Get the 64-bit filter Id.
+     */
+    Result getId64Bit(uint64_t& id);
+
+    /**
+     * Release the handle reported by the HAL for AV memory.
+     */
+    Result releaseAvHandle(native_handle_t* handle, uint64_t avDataId);
+
+    /**
+     * Set the filter's data source.
+     */
+    Result setDataSource(sp<FilterClient> filterClient);
+
+    /**
+     * Get the Hal filter to build up filter linkage.
+     */
+    sp<IFilter> getHalFilter() { return mFilter; }
+
+    /**
+     * Get the Aidl filter to build up filter linkage.
+     */
+    //shared_ptr<ITunerFilter> getAidlFilter() { return mTunerFilter; }
+
+    /**
+     * Close a new interface of ITunerFilter.
+     */
+    Result close();
+
+private:
+    Result getFilterMq();
+    int copyData(uint8_t* buffer, int size);
+
+    /**
+     * An AIDL Tuner Filter Singleton assigned at the first time when the Tuner Client
+     * opens a filter. Default null when Tuner Service does not exist.
+     */
+    // TODO: pending on aidl interface
+    //static shared_ptr<ITunerFilter> mTunerFilter;
+
+    /**
+     * A 1.0 Filter HAL interface that is ready before migrating to the TunerFilter.
+     * This is a temprary interface before Tuner Framework migrates to use TunerService.
+     * Default null when the HAL service does not exist.
+     */
+    static sp<IFilter> mFilter;
+
+    /**
+     * A 1.1 Filter HAL interface that is ready before migrating to the TunerFilter.
+     * This is a temprary interface before Tuner Framework migrates to use TunerService.
+     * Default null when the HAL service does not exist.
+     */
+    static sp<::android::hardware::tv::tuner::V1_1::IFilter> mFilter_1_1;
+
+    unique_ptr<MQ> mFilterMQ;
+    EventFlag* mFilterMQEventFlag;
+};
+}  // namespace android
+
+#endif  // _ANDROID_MEDIA_TV_FILTER_CLIENT_H_

media/jni/tuner/FrontendClient.cpp

@@ -27,10 +27,11 @@ namespace android {
 
 /////////////// FrontendClient ///////////////////////
 
-FrontendClient::FrontendClient(shared_ptr<ITunerFrontend> tunerFrontend) {
+FrontendClient::FrontendClient(shared_ptr<ITunerFrontend> tunerFrontend, int frontendHandle) {
     mTunerFrontend = tunerFrontend;
     mAidlCallback = NULL;
     mHidlCallback = NULL;
+    mFrontendHandle = frontendHandle;
 }
 
 FrontendClient::~FrontendClient() {
@@ -39,6 +40,7 @@ FrontendClient::~FrontendClient() {
     mFrontend_1_1 = NULL;
     mAidlCallback = NULL;
     mHidlCallback = NULL;
+    mFrontendHandle = -1;
 }
 
 Result FrontendClient::setCallback(sp<FrontendClientCallback> frontendClientCallback) {
@@ -116,6 +118,14 @@ Result FrontendClient::close() {
     return Result::INVALID_STATE;
 }
 
+shared_ptr<ITunerFrontend> FrontendClient::getAidlFrontend() {
+    return mTunerFrontend;
+}
+
+int FrontendClient::getId() {
+    return getResourceIdFromHandle(mFrontendHandle);
+}
+
 /////////////// TunerFrontendCallback ///////////////////////
 
 TunerFrontendCallback::TunerFrontendCallback(sp<FrontendClientCallback> frontendClientCallback)

media/jni/tuner/FrontendClient.h

@@ -105,7 +105,7 @@ private:
 struct FrontendClient : public RefBase {
 
 public:
-    FrontendClient(shared_ptr<ITunerFrontend> tunerFrontend);
+    FrontendClient(shared_ptr<ITunerFrontend> tunerFrontend, int frontendHandle);
     ~FrontendClient();
 
     /**
@@ -131,6 +131,14 @@ public:
      */
     Result close();
 
+    shared_ptr<ITunerFrontend> getAidlFrontend();
+
+    int getId();
+
+    static int getResourceIdFromHandle(int handle) {
+        return (handle & 0x00ff0000) >> 16;
+    }
+
 private:
     /**
      * An AIDL Tuner Frontend Singleton assigned at the first time when the Tuner Client
@@ -154,6 +162,8 @@ private:
 
     shared_ptr<TunerFrontendCallback> mAidlCallback;
     sp<HidlFrontendCallback> mHidlCallback;
+
+    int mFrontendHandle;
 };
 }  // namespace android
 

media/jni/tuner/FrontendClientCallback.h

@@ -35,4 +35,4 @@ struct FrontendClientCallback : public RefBase {
 };
 }  // namespace android
 
-#endif  // _ANDROID_MEDIA_TV_FRONTEND_CLIENT_CALLBACK_H_
+#endif  // _ANDROID_MEDIA_TV_FRONTEND_CLIENT_CALLBACK_H_

media/jni/tuner/TunerClient.cpp

@@ -82,13 +82,13 @@ sp<FrontendClient> TunerClient::openFrontend(int frontendHandle) {
         // TODO: handle error code
         shared_ptr<ITunerFrontend> tunerFrontend;
         mTunerService->openFrontend(frontendHandle, &tunerFrontend);
-        return new FrontendClient(tunerFrontend);
+        return new FrontendClient(tunerFrontend, frontendHandle);
     }
 
     if (mTuner != NULL) {
         sp<IFrontend> hidlFrontend = openHidlFrontendByHandle(frontendHandle);
         if (hidlFrontend != NULL) {
-            sp<FrontendClient> frontendClient = new FrontendClient(NULL);
+            sp<FrontendClient> frontendClient = new FrontendClient(NULL, frontendHandle);
             frontendClient->setHidlFrontend(hidlFrontend);
             return frontendClient;
         }
@@ -136,6 +136,27 @@ shared_ptr<FrontendDtmbCapabilities> TunerClient::getFrontendDtmbCapabilities(in
     return NULL;
 }
 
+sp<DemuxClient> TunerClient::openDemux(int /*demuxHandle*/) {
+    if (mTunerService != NULL) {
+        // TODO: handle error code
+        /*shared_ptr<ITunerDemux> tunerDemux;
+        mTunerService->openDemux(demuxHandle, &tunerDemux);
+        return new DemuxClient(tunerDemux);*/
+    }
+
+    if (mTuner != NULL) {
+        // TODO: pending aidl interface
+        sp<DemuxClient> demuxClient = new DemuxClient();
+        sp<IDemux> hidlDemux = openHidlDemux();
+        if (hidlDemux != NULL) {
+            demuxClient->setHidlDemux(hidlDemux);
+            return demuxClient;
+        }
+    }
+
+    return NULL;
+}
+
 /////////////// TunerClient Helper Methods ///////////////////////
 
 sp<ITuner> TunerClient::getHidlTuner() {
@@ -183,6 +204,21 @@ Result TunerClient::getHidlFrontendInfo(int id, FrontendInfo& feInfo) {
     return res;
 }
 
+sp<IDemux> TunerClient::openHidlDemux() {
+    sp<IDemux> demux;
+    Result res;
+
+    mTuner->openDemux([&](Result result, uint32_t /*id*/, const sp<IDemux>& demuxSp) {
+        demux = demuxSp;
+        res = result;
+    });
+    if (res != Result::SUCCESS || demux == nullptr) {
+        ALOGE("Failed to open demux");
+        return NULL;
+    }
+    return demux;
+}
+
 FrontendInfo TunerClient::FrontendInfoAidlToHidl(TunerServiceFrontendInfo aidlFrontendInfo) {
     FrontendInfo hidlFrontendInfo {
         .type = static_cast<FrontendType>(aidlFrontendInfo.type),

media/jni/tuner/TunerClient.h

@@ -22,6 +22,7 @@
 #include <android/hardware/tv/tuner/1.1/types.h>
 
 #include "FrontendClient.h"
+#include "DemuxClient.h"
 
 using ::aidl::android::media::tv::tuner::ITunerService;
 using ::aidl::android::media::tv::tuner::TunerServiceFrontendInfo;
@@ -73,6 +74,21 @@ public:
      */
     shared_ptr<FrontendDtmbCapabilities> getFrontendDtmbCapabilities(int id);
 
+    /**
+     * Open a new interface of DemuxClient given a demuxHandle.
+     *
+     * @param demuxHandle the handle of the demux granted by TRM.
+     * @return a newly created DemuxClient interface.
+     */
+    sp<DemuxClient> openDemux(int demuxHandle);
+
+    /**
+     * Retrieve the Demux capabilities.
+     *
+     * @return the demux’s capabilities.
+     */
+    //DemuxCapabilities getDemuxCaps() {};
+
     /**
      * Get the current Tuner HAL version. The high 16 bits are the major version number
      * while the low 16 bits are the minor version. Default value is unknown version 0.
@@ -110,6 +126,7 @@ private:
 
     sp<ITuner> getHidlTuner();
     sp<IFrontend> openHidlFrontendByHandle(int frontendHandle);
+    sp<IDemux> openHidlDemux();
     Result getHidlFrontendInfo(int id, FrontendInfo& info);
     FrontendInfo FrontendInfoAidlToHidl(TunerServiceFrontendInfo aidlFrontendInfo);
 };