diff --git a/services/tuner/TunerDemux.cpp b/services/tuner/TunerDemux.cpp
new file mode 100644
index 0000000..edd1802
--- /dev/null
+++ b/services/tuner/TunerDemux.cpp
@@ -0,0 +1,103 @@
+/**
+ * Copyright 2021, 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 "TunerDemux"
+
+#include "TunerDemux.h"
+#include "TunerFilter.h"
+
+using ::android::hardware::tv::tuner::V1_0::DemuxAlpFilterType;
+using ::android::hardware::tv::tuner::V1_0::DemuxFilterMainType;
+using ::android::hardware::tv::tuner::V1_0::DemuxFilterType;
+using ::android::hardware::tv::tuner::V1_0::DemuxIpFilterType;
+using ::android::hardware::tv::tuner::V1_0::DemuxMmtpFilterType;
+using ::android::hardware::tv::tuner::V1_0::DemuxTlvFilterType;
+using ::android::hardware::tv::tuner::V1_0::DemuxTsFilterType;
+using ::android::hardware::tv::tuner::V1_0::Result;
+
+namespace android {
+
+TunerDemux::TunerDemux(sp<IDemux> demux, int id) {
+    mDemux = demux;
+    mDemuxId = id;
+}
+
+TunerDemux::~TunerDemux() {
+    mDemux = nullptr;
+}
+
+Status TunerDemux::setFrontendDataSource(const std::shared_ptr<ITunerFrontend>& frontend) {
+    if (mDemux == nullptr) {
+        ALOGE("IDemux is not initialized");
+        return Status::fromServiceSpecificError(static_cast<int32_t>(Result::UNAVAILABLE));
+    }
+
+    int frontendId;
+    frontend->getFrontendId(&frontendId);
+    Result res = mDemux->setFrontendDataSource(frontendId);
+    if (res != Result::SUCCESS) {
+        return ::ndk::ScopedAStatus::fromServiceSpecificError(static_cast<int32_t>(res));
+    }
+    return Status::ok();
+}
+
+Status TunerDemux::openFilter(
+        int type, int subType, int bufferSize, const std::shared_ptr<ITunerFilterCallback>& cb,
+        std::shared_ptr<ITunerFilter>* _aidl_return) {
+    if (mDemux == nullptr) {
+        ALOGE("IDemux is not initialized.");
+        return Status::fromServiceSpecificError(static_cast<int32_t>(Result::UNAVAILABLE));
+    }
+
+    DemuxFilterMainType mainType = static_cast<DemuxFilterMainType>(type);
+    DemuxFilterType filterType {
+        .mainType = mainType,
+    };
+
+    switch(mainType) {
+        case DemuxFilterMainType::TS:
+            filterType.subType.tsFilterType(static_cast<DemuxTsFilterType>(subType));
+            break;
+        case DemuxFilterMainType::MMTP:
+            filterType.subType.mmtpFilterType(static_cast<DemuxMmtpFilterType>(subType));
+            break;
+        case DemuxFilterMainType::IP:
+            filterType.subType.ipFilterType(static_cast<DemuxIpFilterType>(subType));
+            break;
+        case DemuxFilterMainType::TLV:
+            filterType.subType.tlvFilterType(static_cast<DemuxTlvFilterType>(subType));
+            break;
+        case DemuxFilterMainType::ALP:
+            filterType.subType.alpFilterType(static_cast<DemuxAlpFilterType>(subType));
+            break;
+    }
+    Result status;
+    sp<IFilter> filterSp;
+    sp<IFilterCallback> cbSp = new TunerFilter::FilterCallback(cb);
+    mDemux->openFilter(filterType, bufferSize, cbSp,
+            [&](Result r, const sp<IFilter>& filter) {
+                filterSp = filter;
+                status = r;
+            });
+    if (status != Result::SUCCESS) {
+        return Status::fromServiceSpecificError(static_cast<int32_t>(status));
+    }
+
+    *_aidl_return = ::ndk::SharedRefBase::make<TunerFilter>(filterSp, cbSp);
+    return Status::ok();
+}
+
+}  // namespace android