Add API to set the codec preference for specific device

Add the APIs that would use in developer optin for setting
the codec config preference and getiting the codec status.
Expose the APIs first, some of the implementations
will be done later.
Add equals function to BluetoothLeAudioCodecConfig for
comparison usage

Tag: #feature
Bug: 216276721
Bug: 150670922
Test: atest BluetoothInstrumentationTests
Change-Id: Iaa9b7b1278f06228b7a22a1c61668b879b6f3dc9
Merged-In: Iaa9b7b1278f06228b7a22a1c61668b879b6f3dc9
(cherry picked from commit 7cf686a443eb2a1d036ba89c874a328fa24bb425)

1 files changed, 194 insertions, 0 deletions

diff --git a/framework/java/android/bluetooth/BluetoothLeAudioCodecStatus.java b/framework/java/android/bluetooth/BluetoothLeAudioCodecStatus.java
new file mode 100644
index 0000000000..f11d86707c
--- /dev/null
+++ b/framework/java/android/bluetooth/BluetoothLeAudioCodecStatus.java
@@ -0,0 +1,194 @@
+/*
+ * Copyright (C) 2022 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.bluetooth;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Represents the codec status (configuration and capability) for a Bluetooth
+ * Le Audio source device.
+ *
+ * {@see BluetoothLeAudio}
+ */
+public final class BluetoothLeAudioCodecStatus implements Parcelable {
+    /**
+     * Extra for the codec configuration intents of the individual profiles.
+     *
+     * This extra represents the current codec status of the Le Audio
+     * profile.
+     */
+    public static final String EXTRA_LE_AUDIO_CODEC_STATUS =
+            "android.bluetooth.extra.LE_AUDIO_CODEC_STATUS";
+
+    private final @Nullable BluetoothLeAudioCodecConfig mCodecConfig;
+    private final @Nullable List<BluetoothLeAudioCodecConfig> mCodecsLocalCapabilities;
+    private final @Nullable List<BluetoothLeAudioCodecConfig> mCodecsSelectableCapabilities;
+
+    /**
+     * Represents the codec status for a Bluetooth LE Audio source device.
+     *
+     * @param codecConfig the current code configutration.
+     * @param codecsLocalCapabilities the local codecs capabilities.
+     * @param codecsSelectableCapabilities the selectable codecs capabilities.
+     */
+    public BluetoothLeAudioCodecStatus(@Nullable BluetoothLeAudioCodecConfig codecConfig,
+            @Nullable List<BluetoothLeAudioCodecConfig> codecsLocalCapabilities,
+            @Nullable List<BluetoothLeAudioCodecConfig> codecsSelectableCapabilities) {
+        mCodecConfig = codecConfig;
+        mCodecsLocalCapabilities = codecsLocalCapabilities;
+        mCodecsSelectableCapabilities = codecsSelectableCapabilities;
+    }
+
+    private BluetoothLeAudioCodecStatus(Parcel in) {
+        mCodecConfig = in.readTypedObject(BluetoothLeAudioCodecConfig.CREATOR);
+        mCodecsLocalCapabilities = in.createTypedArrayList(BluetoothLeAudioCodecConfig.CREATOR);
+        mCodecsSelectableCapabilities =
+                in.createTypedArrayList(BluetoothLeAudioCodecConfig.CREATOR);
+    }
+
+    @Override
+    public boolean equals(@Nullable Object o) {
+        if (o instanceof BluetoothLeAudioCodecStatus) {
+            BluetoothLeAudioCodecStatus other = (BluetoothLeAudioCodecStatus) o;
+            return (Objects.equals(other.mCodecConfig, mCodecConfig)
+                    && sameCapabilities(other.mCodecsLocalCapabilities, mCodecsLocalCapabilities)
+                    && sameCapabilities(other.mCodecsSelectableCapabilities,
+                    mCodecsSelectableCapabilities));
+        }
+        return false;
+    }
+
+    /**
+     * Checks whether two lists of capabilities contain same capabilities.
+     * The order of the capabilities in each list is ignored.
+     *
+     * @param c1 the first list of capabilities to compare
+     * @param c2 the second list of capabilities to compare
+     * @return {@code true} if both lists contain same capabilities
+     */
+    private static boolean sameCapabilities(@Nullable List<BluetoothLeAudioCodecConfig> c1,
+                                           @Nullable List<BluetoothLeAudioCodecConfig> c2) {
+        if (c1 == null) {
+            return (c2 == null);
+        }
+        if (c2 == null) {
+            return false;
+        }
+        if (c1.size() != c2.size()) {
+            return false;
+        }
+        return c1.containsAll(c2);
+    }
+
+    /**
+     * Checks whether the codec config matches the selectable capabilities.
+     * Any parameters of the codec config with NONE value will be considered a wildcard matching.
+     *
+     * @param codecConfig the codec config to compare against
+     * @return {@code true} if the codec config matches, {@code false} otherwise
+     */
+    public boolean isCodecConfigSelectable(@Nullable BluetoothLeAudioCodecConfig codecConfig) {
+        // TODO: Add the implementation to check the config is selectable
+        return true;
+    }
+
+    /**
+     * Returns a hash based on the codec config and local capabilities.
+     */
+    @Override
+    public int hashCode() {
+        return Objects.hash(mCodecConfig, mCodecsLocalCapabilities, mCodecsLocalCapabilities);
+    }
+
+    /**
+     * Returns a {@link String} that describes each BluetoothLeAudioCodecStatus parameter
+     * current value.
+     */
+    @Override
+    public String toString() {
+        return "{mCodecConfig:" + mCodecConfig
+                + ",mCodecsLocalCapabilities:" + mCodecsLocalCapabilities
+                + ",mCodecsSelectableCapabilities:" + mCodecsSelectableCapabilities
+                + "}";
+    }
+
+    /**
+     * @return 0
+     */
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    /**
+     * {@link Parcelable.Creator} interface implementation.
+     */
+    public static final @android.annotation.NonNull
+            Parcelable.Creator<BluetoothLeAudioCodecStatus> CREATOR =
+            new Parcelable.Creator<BluetoothLeAudioCodecStatus>() {
+                public BluetoothLeAudioCodecStatus createFromParcel(Parcel in) {
+                    return new BluetoothLeAudioCodecStatus(in);
+                }
+
+                public BluetoothLeAudioCodecStatus[] newArray(int size) {
+                    return new BluetoothLeAudioCodecStatus[size];
+                }
+            };
+
+    /**
+     * Flattens the object to a parcel.
+     *
+     * @param out The Parcel in which the object should be written
+     * @param flags Additional flags about how the object should be written
+     */
+    @Override
+    public void writeToParcel(@NonNull Parcel out, int flags) {
+        out.writeTypedObject(mCodecConfig, 0);
+        out.writeTypedList(mCodecsLocalCapabilities);
+        out.writeTypedList(mCodecsSelectableCapabilities);
+    }
+
+    /**
+     * Returns the current codec configuration.
+     */
+    public @Nullable BluetoothLeAudioCodecConfig getCodecConfig() {
+        return mCodecConfig;
+    }
+
+    /**
+     * Returns the codecs local capabilities.
+     */
+    public @NonNull List<BluetoothLeAudioCodecConfig> getCodecsLocalCapabilities() {
+        return (mCodecsLocalCapabilities == null)
+                ? Collections.emptyList() : mCodecsLocalCapabilities;
+    }
+
+    /**
+     * Returns the codecs selectable capabilities.
+     */
+    public @NonNull List<BluetoothLeAudioCodecConfig> getCodecsSelectableCapabilities() {
+        return (mCodecsSelectableCapabilities == null)
+                ? Collections.emptyList() : mCodecsSelectableCapabilities;
+    }
+}