system/bta/le_audio/audio_set_configurations.fbs

/*
 *  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.
 *
 */
namespace bluetooth.fbs.le_audio;
enum CodecSpecificLtvGenericTypes : byte {
    SUPPORTED_SAMPLING_FREQUENCY = 0x01,
    SUPPORTED_FRAME_DURATION = 0x02,
    SUPPORTED_AUDIO_CHANNEL_ALLOCATION = 0x03,
    SUPPORTED_OCTETS_PER_CODEC_FRAME = 0x04,
    SUPPORTED_CODEC_FRAME_BLOCKS_PER_SDU = 0x05,
}
/// Note: Holds either a single value (when `value_width == 0`) or multiple
///       values if `value.length()` is no-remainder divisible by the non-zero
///       `value_width`.
/// Note: Consider extending it with `flags` field, to hold additional info like
///       IsBitfield, IsRange, etc. if we need these type-specific validations.
table CompoundValue {
    value: [ubyte] (required);
    value_width: ubyte = 0;
}
table CodecSpecificConfiguration {
    name: string;
    type: ubyte (key);
    compound_value: CompoundValue;
}
struct CodecId {
    coding_format: ubyte;
    vendor_company_id : ushort;
    vendor_codec_id : ushort;
}
enum AudioSetConfigurationStrategy : byte {
    MONO_ONE_CIS_PER_DEVICE = 0x00,
    STEREO_TWO_CISES_PER_DEVICE = 0x01,
    STEREO_ONE_CIS_PER_DEVICE = 0x02,
}
enum AudioSetConfigurationDirection : byte {
    SINK = 0x01,
    SOURCE = 0x02,
}
enum AudioSetConfigurationTargetLatency : byte {
    LOW = 0x01,
    BALANCED_RELIABILITY = 0x02,
    HIGH_RELIABILITY = 0x03,
}
table AudioSetSubConfiguration {
    ase_channel_cnt: ubyte;
    ase_cnt: ubyte;
    direction: AudioSetConfigurationDirection = SINK;
    codec_id : CodecId (required);
    codec_configuration: [CodecSpecificConfiguration] (required);
}
table CodecConfiguration {
    name: string (key, required);
    subconfigurations: [AudioSetSubConfiguration] (required);
}
table QosConfiguration {
    name: string (key, required);
    target_latency: AudioSetConfigurationTargetLatency = BALANCED_RELIABILITY;
    retransmission_number: ubyte;
    max_transport_latency : ushort;
}
/// Each set configration can contain multiple logical subconfigurations, which
/// all must be configurable with the current set of audio devices. For example,
/// one can define multiple output stream configurations with different
/// qualities, or assign different configurations to each stream direction.
table AudioSetConfiguration {
    name: string (key, required);
    codec_config_name: string (required);
    qos_config_name: [string] (required);
}
table AudioSetConfigurations {
    _comments_: [string];
    configurations: [AudioSetConfiguration] (required);
    codec_configurations: [CodecConfiguration] (required);
    qos_configurations: [QosConfiguration] (required);
}
root_type AudioSetConfigurations;