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/*
* 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;
};
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