Parse audio config codec capability for LE devices

 1. Rename function getHwOffloadEncodingFormatsSupportedForA2DP
    to getHwOffloadFormatsSupportedForBluetoothMedia
 2. Add audio format for LC3
 3. Add public class BluetoothLeAudioCodecConfig to store the
    codec for LE audio
 4. Add test case for BluetoothLeAudioCodecConfig

Tag: #feature
Bug: 203535499
Bug: 150670922
Test: atest BluetoothLeAudioCodecConfigTest BluetoothInstrumentationTests
Change-Id: I5f64d9078ca2c07e13cffd83b879dd95468ed313
Merged-In: I5f64d9078ca2c07e13cffd83b879dd95468ed313

1 files changed, 129 insertions, 0 deletions

diff --git a/framework/java/android/bluetooth/BluetoothLeAudioCodecConfig.java b/framework/java/android/bluetooth/BluetoothLeAudioCodecConfig.java
new file mode 100644
index 0000000000..dcaf4b682f
--- /dev/null
+++ b/framework/java/android/bluetooth/BluetoothLeAudioCodecConfig.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 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.
+ */
+
+package android.bluetooth;
+
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Represents the codec configuration for a Bluetooth LE Audio source device.
+ * <p>Contains the source codec type.
+ * <p>The source codec type values are the same as those supported by the
+ * device hardware.
+ *
+ * {@see BluetoothLeAudioCodecConfig}
+ */
+public final class BluetoothLeAudioCodecConfig {
+    // Add an entry for each source codec here.
+
+    /** @hide */
+    @IntDef(prefix = "SOURCE_CODEC_TYPE_", value = {
+            SOURCE_CODEC_TYPE_LC3,
+            SOURCE_CODEC_TYPE_INVALID
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface SourceCodecType {};
+
+    public static final int SOURCE_CODEC_TYPE_LC3 = 0;
+    public static final int SOURCE_CODEC_TYPE_INVALID = 1000 * 1000;
+
+    /**
+     * Represents the count of valid source codec types. Can be accessed via
+     * {@link #getMaxCodecType}.
+     */
+    private static final int SOURCE_CODEC_TYPE_MAX = 1;
+
+    private final @SourceCodecType int mCodecType;
+
+    /**
+     * Creates a new BluetoothLeAudioCodecConfig.
+     *
+     * @param codecType the source codec type
+     */
+    private BluetoothLeAudioCodecConfig(@SourceCodecType int codecType) {
+        mCodecType = codecType;
+    }
+
+    @Override
+    public String toString() {
+        return "{codecName:" + getCodecName() + "}";
+    }
+
+    /**
+     * Gets the codec type.
+     *
+     * @return the codec type
+     */
+    public @SourceCodecType int getCodecType() {
+        return mCodecType;
+    }
+
+    /**
+     * Returns the valid codec types count.
+     */
+    public static int getMaxCodecType() {
+        return SOURCE_CODEC_TYPE_MAX;
+    }
+
+    /**
+     * Gets the codec name.
+     *
+     * @return the codec name
+     */
+    public @NonNull String getCodecName() {
+        switch (mCodecType) {
+            case SOURCE_CODEC_TYPE_LC3:
+                return "LC3";
+            case SOURCE_CODEC_TYPE_INVALID:
+                return "INVALID CODEC";
+            default:
+                break;
+        }
+        return "UNKNOWN CODEC(" + mCodecType + ")";
+    }
+
+    /**
+     * Builder for {@link BluetoothLeAudioCodecConfig}.
+     * <p> By default, the codec type will be set to
+     * {@link BluetoothLeAudioCodecConfig#SOURCE_CODEC_TYPE_INVALID}
+     */
+    public static final class Builder {
+        private int mCodecType = BluetoothLeAudioCodecConfig.SOURCE_CODEC_TYPE_INVALID;
+
+        /**
+         * Set codec type for Bluetooth codec config.
+         *
+         * @param codecType of this codec
+         * @return the same Builder instance
+         */
+        public @NonNull Builder setCodecType(@SourceCodecType int codecType) {
+            mCodecType = codecType;
+            return this;
+        }
+
+        /**
+         * Build {@link BluetoothLeAudioCodecConfig}.
+         * @return new BluetoothLeAudioCodecConfig built
+         */
+        public @NonNull BluetoothLeAudioCodecConfig build() {
+            return new BluetoothLeAudioCodecConfig(mCodecType);
+        }
+    }
+}