/* * Copyright (C) 2018 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.hardware.bluetooth.a2dp@1.0; enum Status : uint8_t { SUCCESS, FAILURE, /** codec configuration not supported by the audio platform */ UNSUPPORTED_CODEC_CONFIGURATION , /** operation is pending */ PENDING, }; enum CodecType : uint32_t { UNKNOWN = 0x00, SBC = 0x01, AAC = 0x02, APTX = 0x04, APTX_HD = 0x08, LDAC = 0x10, }; enum SampleRate : uint32_t { RATE_UNKNOWN = 0x00, RATE_44100 = 0x01, RATE_48000 = 0x02, RATE_88200 = 0x04, RATE_96000 = 0x08, RATE_176400 = 0x10, RATE_192000 = 0x20, }; enum BitsPerSample : uint8_t { BITS_UNKNOWN = 0x00, BITS_16 = 0x01, BITS_24 = 0x02, BITS_32 = 0x04, }; enum ChannelMode : uint8_t { UNKNOWN = 0x00, MONO = 0x01, STEREO = 0x02, }; struct CodecConfiguration { /** Bluetooth A2DP codec */ CodecType codecType; /** Sampling rate for encoder */ SampleRate sampleRate; /** Bits per sample for encoder */ BitsPerSample bitsPerSample; /** Channel mode for encoder */ ChannelMode channelMode; /** * The encoded audio bitrate in bits / second. * 0x00000000 - The audio bitrate is not specified / unused * 0x00000001 - 0x00FFFFFF - Encoded audio bitrate in bits/second * 0x01000000 - 0xFFFFFFFF - Reserved */ uint32_t encodedAudioBitrate; /** Peer MTU (in octets) */ uint16_t peerMtu; union CodecSpecific { /** * SBC Codec specific information * Refer to SBC Codec specific information elements in A2DP v1.3 * Profile Specification. */ struct SbcData { /** Block length: 4 bits | Subbands: 2 bits | Allocation Method: 2 bits */ uint8_t codecParameters; /** Minimum bitpool value */ uint8_t minBitpool; /** Maximum bitpool value */ uint8_t maxBitpool; } sbcData; struct LdacData { /** * LDAC bitrate index value: * 0x00 - High * 0x01 - Mid * 0x02 - Low * 0x7F - ABR (Adaptive Bit Rate) */ uint8_t bitrateIndex; } ldacData; } codecSpecific; };