Create MediaTuner Java class and JNI

Test: make; acloud create;
Change-Id: Idac63c5ecf370e2b6b209e9e57d9453876b307d9

4 files changed, 253 insertions, 0 deletions

diff --git a/media/java/android/media/tv/tuner/Tuner.java b/media/java/android/media/tv/tuner/Tuner.java
new file mode 100644
index 000000000000..0228dc94fb25
--- /dev/null
+++ b/media/java/android/media/tv/tuner/Tuner.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2019 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.
+ */
+
+package android.media.tv.tuner;
+
+/**
+ * Tuner is used to interact with tuner devices.
+ *
+ * @hide
+ */
+public final class Tuner implements AutoCloseable  {
+    private static final String TAG = "MediaTvTuner";
+    private static final boolean DEBUG = false;
+
+    static {
+        System.loadLibrary("media_tv_tuner");
+        nativeInit();
+    }
+
+    public Tuner() {
+        nativeSetup();
+    }
+
+    private long mNativeContext; // used by native jMediaTuner
+
+    @Override
+    public void close() {}
+
+    /**
+     * Native Initialization.
+     */
+    private static native void nativeInit();
+
+    /**
+     * Native setup.
+     */
+    private native void nativeSetup();
+}
diff --git a/media/jni/Android.bp b/media/jni/Android.bp
index b4edabfb2e8b..a596d89bdcce 100644
--- a/media/jni/Android.bp
+++ b/media/jni/Android.bp
@@ -123,6 +123,30 @@ cc_library_shared {
     ],
 }
 
+cc_library_shared {
+    name: "libmedia_tv_tuner",
+    srcs: [
+        "android_media_tv_Tuner.cpp",
+    ],
+
+    shared_libs: [
+        "android.hardware.tv.tuner@1.0",
+        "libandroid_runtime",
+        "liblog",
+        "libutils",
+    ],
+
+    export_include_dirs: ["."],
+
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-Wno-error=deprecated-declarations",
+        "-Wunused",
+        "-Wunreachable-code",
+    ],
+}
+
 subdirs = [
     "audioeffect",
     "soundpool",
diff --git a/media/jni/android_media_tv_Tuner.cpp b/media/jni/android_media_tv_Tuner.cpp
new file mode 100644
index 000000000000..d499eee5a9da
--- /dev/null
+++ b/media/jni/android_media_tv_Tuner.cpp
@@ -0,0 +1,135 @@
+/*
+ * Copyright 2019 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 "TvTuner-JNI"
+#include <utils/Log.h>
+
+#include "android_media_tv_Tuner.h"
+#include "android_runtime/AndroidRuntime.h"
+
+#include <android/hardware/tv/tuner/1.0/ITuner.h>
+#include <media/stagefright/foundation/ADebug.h>
+
+#pragma GCC diagnostic ignored "-Wunused-function"
+
+using ::android::hardware::tv::tuner::V1_0::ITuner;
+
+struct fields_t {
+    jfieldID context;
+};
+
+static fields_t gFields;
+
+namespace android {
+
+sp<ITuner> JTuner::mTuner;
+
+JTuner::JTuner(JNIEnv *env, jobject thiz)
+    : mClass(NULL) {
+    jclass clazz = env->GetObjectClass(thiz);
+    CHECK(clazz != NULL);
+
+    mClass = (jclass)env->NewGlobalRef(clazz);
+    mObject = env->NewWeakGlobalRef(thiz);
+    if (mTuner == NULL) {
+        mTuner = getTunerService();
+    }
+}
+
+JTuner::~JTuner() {
+    JNIEnv *env = AndroidRuntime::getJNIEnv();
+
+    env->DeleteGlobalRef(mClass);
+    mTuner = NULL;
+    mClass = NULL;
+    mObject = NULL;
+}
+
+sp<ITuner> JTuner::getTunerService() {
+    if (mTuner == nullptr) {
+        mTuner = ITuner::getService();
+
+        if (mTuner == nullptr) {
+            ALOGW("Failed to get tuner service.");
+        }
+    }
+    return mTuner;
+}
+
+}  // namespace android
+
+////////////////////////////////////////////////////////////////////////////////
+
+using namespace android;
+
+static sp<JTuner> setTuner(JNIEnv *env, jobject thiz, const sp<JTuner> &tuner) {
+    sp<JTuner> old = (JTuner *)env->GetLongField(thiz, gFields.context);
+
+    if (tuner != NULL) {
+        tuner->incStrong(thiz);
+    }
+    if (old != NULL) {
+        old->decStrong(thiz);
+    }
+    env->SetLongField(thiz, gFields.context, (jlong)tuner.get());
+
+    return old;
+}
+
+static sp<JTuner> getTuner(JNIEnv *env, jobject thiz) {
+    return (JTuner *)env->GetLongField(thiz, gFields.context);
+}
+
+static void android_media_tv_Tuner_native_init(JNIEnv *env) {
+    jclass clazz = env->FindClass("android/media/tv/tuner/Tuner");
+    CHECK(clazz != NULL);
+
+    gFields.context = env->GetFieldID(clazz, "mNativeContext", "J");
+    CHECK(gFields.context != NULL);
+}
+
+static void android_media_tv_Tuner_native_setup(JNIEnv *env, jobject thiz) {
+    sp<JTuner> tuner = new JTuner(env, thiz);
+    setTuner(env,thiz, tuner);
+}
+
+static const JNINativeMethod gMethods[] = {
+    { "nativeInit", "()V", (void *)android_media_tv_Tuner_native_init },
+    { "nativeSetup", "()V", (void *)android_media_tv_Tuner_native_setup },
+};
+
+static int register_android_media_tv_Tuner(JNIEnv *env) {
+    return AndroidRuntime::registerNativeMethods(
+            env, "android/media/tv/tuner/Tuner", gMethods, NELEM(gMethods));
+}
+
+jint JNI_OnLoad(JavaVM* vm, void* /* reserved */)
+{
+    JNIEnv* env = NULL;
+    jint result = -1;
+
+    if (vm->GetEnv((void**) &env, JNI_VERSION_1_4) != JNI_OK) {
+        ALOGE("ERROR: GetEnv failed\n");
+        return result;
+    }
+    assert(env != NULL);
+
+    if (register_android_media_tv_Tuner(env) != JNI_OK) {
+        ALOGE("ERROR: Tuner native registration failed\n");
+        return result;
+    }
+    return JNI_VERSION_1_4;
+}
diff --git a/media/jni/android_media_tv_Tuner.h b/media/jni/android_media_tv_Tuner.h
new file mode 100644
index 000000000000..e7d5924a7dbe
--- /dev/null
+++ b/media/jni/android_media_tv_Tuner.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2019 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_TUNER_H_
+#define _ANDROID_MEDIA_TV_TUNER_H_
+
+#include <android/hardware/tv/tuner/1.0/ITuner.h>
+#include <utils/RefBase.h>
+
+#include "jni.h"
+
+using ::android::hardware::tv::tuner::V1_0::ITuner;
+
+namespace android {
+
+struct JTuner : public RefBase {
+    JTuner(JNIEnv *env, jobject thiz);
+    sp<ITuner> getTunerService();
+protected:
+    virtual ~JTuner();
+
+private:
+    jclass mClass;
+    jweak mObject;
+    static sp<ITuner> mTuner;
+};
+
+}  // namespace android
+
+#endif  // _ANDROID_MEDIA_TV_TUNER_H_