bta/le_audio/client_parser.cc

/*
 * Copyright 2019 HIMSA II K/S - www.himsa.com. Represented by EHIMA -
 * www.ehima.com
 *
 * 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.
 */

/*
 *  This module contains API of the audio stream control protocol.
 */

#include "client_parser.h"

#include <base/strings/string_number_conversions.h>
#include <bluetooth/log.h>
#include <hardware/bt_gatt_types.h>

#include <bitset>
#include <cstddef>
#include <cstdint>
#include <map>
#include <numeric>
#include <sstream>
#include <string>
#include <utility>
#include <vector>

#include "le_audio_types.h"
#include "le_audio_utils.h"
#include "stack/include/bt_types.h"

using bluetooth::le_audio::types::acs_ac_record;

namespace bluetooth::le_audio {
namespace client_parser {
namespace ascs {
static std::map<uint8_t, std::string> ase_state_map_string = {
        {kAseStateIdle, "Idle"},
        {kAseStateCodecConfigured, "Codec Configured"},
        {kAseStateQosConfigured, "QoS Configured"},
        {kAseStateEnabling, "Enabling"},
        {kAseStateStreaming, "Streaming"},
        {kAseStateDisabling, "Disabling"},
        {kAseStateReleasing, "Releasing"},
};

static std::map<uint8_t, std::string> ctp_opcode_map_string = {
        {kCtpOpcodeCodecConfiguration, "Config Codec"},
        {kCtpOpcodeQosConfiguration, "Config QoS"},
        {kCtpOpcodeEnable, "Enable"},
        {kCtpOpcodeReceiverStartReady, "Receiver Start Ready"},
        {kCtpOpcodeDisable, "Disable"},
        {kCtpOpcodeReceiverStopReady, "Receiver Stop Ready"},
        {kCtpOpcodeUpdateMetadata, "Update Metadata"},
        {kCtpOpcodeRelease, "Release"},
};

static std::map<uint8_t, std::string> ctp_configuration_reason_map_string = {
        {kCtpResponseNoReason, ""},
        {kCtpResponseCodecId, "Codec ID"},
        {kCtpResponseCodecSpecificConfiguration, "Codec specific configuration"},
        {kCtpResponseSduInterval, "SDU interval"},
        {kCtpResponseFraming, "Framing"},
        {kCtpResponsePhy, "PHY"},
        {kCtpResponseMaximumSduSize, "Maximum SDU size"},
        {kCtpResponseRetransmissionNumber, "Retransmission number"},
        {kCtpResponseMaxTransportLatency, "Max Transport latency"},
        {kCtpResponsePresentationDelay, "Presentation delay"},
        {kCtpResponseInvalidAseCisMapping, "Invalid ASE CIS mapping"},
};

static std::map<uint8_t, std::string> ctp_response_code_map_string = {
        {kCtpResponseCodeSuccess, "Success"},
        {kCtpResponseCodeUnsupportedOpcode, "Unsupported Opcode"},
        {kCtpResponseCodeInvalidLength, "Invalid Length"},
        {kCtpResponseCodeInvalidAseId, "Invalid ASE ID"},
        {kCtpResponseCodeInvalidAseStateMachineTransition, "Invalid ASE State Machine Transition"},
        {kCtpResponseCodeInvalidAseDirection, "Invalid ASE Direction"},
        {kCtpResponseCodeUnsupportedAudioCapabilities, "Unsupported Audio Capabilities"},
        {kCtpResponseCodeUnsupportedConfigurationParameterValue,
         "Unsupported Configuration Parameter Value"},
        {kCtpResponseCodeRejectedConfigurationParameterValue,
         "Rejected Configuration Parameter Value"},
        {kCtpResponseCodeInvalidConfigurationParameterValue,
         "Invalid Configuration Parameter Value"},
        {kCtpResponseCodeUnsupportedMetadata, "Unsupported Metadata"},
        {kCtpResponseCodeRejectedMetadata, "Rejected Metadata"},
        {kCtpResponseCodeInvalidMetadata, "Invalid Metadata"},
        {kCtpResponseCodeInsufficientResources, "Insufficient Resources"},
        {kCtpResponseCodeUnspecifiedError, "Unspecified Error"},
};

static std::map<uint8_t, std::string> ctp_metadata_reason_map_string = {
        {kCtpMetadataResponsePreferredAudioContexts, "Preferred Audio Contexts"},
        {kCtpMetadataResponseStreamingAudioContexts, "Streaming Audio Contexts"},
        {kCtpMetadataResponseProgramInfo, "Program Info"},
        {kCtpMetadataResponseLanguage, "Language"},
        {kCtpMetadataResponseCcidList, "CCID List"},
        {kCtpMetadataResponseParentalRating, "Parental Rating"},
        {kCtpMetadataResponseProgramInfoUri, "Program Info URI"},
        {kCtpMetadataResponseExtendedMetadata, "Extended Metadata"},
        {kCtpMetadataResponseVendorSpecific, "Vendor Specific"},
};

static std::map<uint8_t, std::map<uint8_t, std::string>*> ctp_response_code_map = {
        {kCtpResponseCodeUnsupportedConfigurationParameterValue,
         &ctp_configuration_reason_map_string},
        {kCtpResponseCodeRejectedConfigurationParameterValue, &ctp_configuration_reason_map_string},
        {kCtpResponseCodeInvalidConfigurationParameterValue, &ctp_configuration_reason_map_string},
        {kCtpResponseCodeUnsupportedMetadata, &ctp_metadata_reason_map_string},
        {kCtpResponseCodeRejectedMetadata, &ctp_metadata_reason_map_string},
        {kCtpResponseCodeInvalidMetadata, &ctp_metadata_reason_map_string},
};

bool ParseAseStatusHeader(ase_rsp_hdr& arh, uint16_t len, const uint8_t* value) {
  if (len < kAseRspHdrMinLen) {
    log::error("wrong len of ASE char (header): {}", static_cast<int>(len));

    return false;
  }

  STREAM_TO_UINT8(arh.id, value);
  STREAM_TO_UINT8(arh.state, value);

  log::info("ASE status: \tASE id: 0x{:x}\tASE state: {} (0x{:x})", arh.id,
            ase_state_map_string[arh.state], arh.state);

  return true;
}

bool ParseAseStatusCodecConfiguredStateParams(struct ase_codec_configured_state_params& rsp,
                                              uint16_t len, const uint8_t* value) {
  uint8_t codec_spec_conf_len;

  if (len < kAseStatusCodecConfMinLen) {
    log::error("Wrong len of codec conf status (Codec conf header)");
    return false;
  }

  STREAM_TO_UINT8(rsp.framing, value);
  STREAM_TO_UINT8(rsp.preferred_phy, value);
  STREAM_TO_UINT8(rsp.preferred_retrans_nb, value);
  STREAM_TO_UINT16(rsp.max_transport_latency, value);
  STREAM_TO_UINT24(rsp.pres_delay_min, value);
  STREAM_TO_UINT24(rsp.pres_delay_max, value);
  STREAM_TO_UINT24(rsp.preferred_pres_delay_min, value);
  STREAM_TO_UINT24(rsp.preferred_pres_delay_max, value);
  STREAM_TO_UINT8(rsp.codec_id.coding_format, value);
  STREAM_TO_UINT16(rsp.codec_id.vendor_company_id, value);
  STREAM_TO_UINT16(rsp.codec_id.vendor_codec_id, value);
  STREAM_TO_UINT8(codec_spec_conf_len, value);

  len -= kAseStatusCodecConfMinLen;

  if (len != codec_spec_conf_len) {
    log::error("Wrong len of codec conf status (Codec spec conf)");
    return false;
  }
  if (codec_spec_conf_len) {
    rsp.codec_spec_conf = std::vector<uint8_t>(value, value + codec_spec_conf_len);
  }

  log::info(
          "Codec configuration\n\tFraming: 0x{:x}\n\tPreferred PHY: "
          "0x{:x}\n\tPreferred retransmission number: 0x{:x}\n\tMax transport "
          "latency: 0x{:x}\n\tPresence delay min: 0x{:x}\n\tPresence delay max: "
          "0x{:x}\n\tPreferredPresentationDelayMin: "
          "0x{:x}\n\tPreferredPresentationDelayMax: 0x{:x}\n\tCoding format: "
          "0x{:x}\n\tVendor codec company ID: 0x{:x}\n\tVendor codec ID: "
          "0x{:x}\n\tCodec specific conf len: {}\n\tCodec specific conf: {}",
          rsp.framing, rsp.preferred_phy, rsp.preferred_retrans_nb, rsp.max_transport_latency,
          rsp.pres_delay_min, rsp.pres_delay_max, rsp.preferred_pres_delay_min,
          rsp.preferred_pres_delay_max, rsp.codec_id.coding_format, rsp.codec_id.vendor_company_id,
          rsp.codec_id.vendor_codec_id, (int)codec_spec_conf_len,
          base::HexEncode(rsp.codec_spec_conf.data(), rsp.codec_spec_conf.size()));

  return true;
}

bool ParseAseStatusQosConfiguredStateParams(struct ase_qos_configured_state_params& rsp,
                                            uint16_t len, const uint8_t* value) {
  if (len != kAseStatusCodecQosConfMinLen) {
    log::error("Wrong len of ASE characteristic (QOS conf header)");
    return false;
  }

  STREAM_TO_UINT8(rsp.cig_id, value);
  STREAM_TO_UINT8(rsp.cis_id, value);
  STREAM_TO_UINT24(rsp.sdu_interval, value);
  STREAM_TO_UINT8(rsp.framing, value);
  STREAM_TO_UINT8(rsp.phy, value);
  STREAM_TO_UINT16(rsp.max_sdu, value);
  STREAM_TO_UINT8(rsp.retrans_nb, value);
  STREAM_TO_UINT16(rsp.max_transport_latency, value);
  STREAM_TO_UINT24(rsp.pres_delay, value);

  log::info(
          "Codec QoS Configured\n\tCIG: 0x{:x}\n\tCIS: 0x{:x}\n\tSDU interval: "
          "0x{:x}\n\tFraming: 0x{:x}\n\tPHY: 0x{:x}\n\tMax SDU: "
          "0x{:x}\n\tRetransmission number: 0x{:x}\n\tMax transport latency: "
          "0x{:x}\n\tPresentation delay: 0x{:x}",
          rsp.cig_id, rsp.cis_id, rsp.sdu_interval, rsp.framing, rsp.phy, rsp.max_sdu,
          rsp.retrans_nb, rsp.max_transport_latency, rsp.pres_delay);

  return true;
}

bool ParseAseStatusTransientStateParams(struct ase_transient_state_params& rsp, uint16_t len,
                                        const uint8_t* value) {
  uint8_t metadata_len;

  if (len < kAseStatusTransMinLen) {
    log::error("Wrong len of ASE characteristic (metadata)");
    return false;
  }

  STREAM_TO_UINT8(rsp.cig_id, value);
  STREAM_TO_UINT8(rsp.cis_id, value);
  STREAM_TO_UINT8(metadata_len, value);
  len -= kAseStatusTransMinLen;

  if (len != metadata_len) {
    log::error("Wrong len of ASE characteristic (metadata)");
    return false;
  }

  if (metadata_len > 0) {
    rsp.metadata = std::vector<uint8_t>(value, value + metadata_len);
  }

  log::info(
          "Status enabling/streaming/disabling\n\tCIG: 0x{:x}\n\tCIS: "
          "0x{:x}\n\tMetadata: {}",
          rsp.cig_id, rsp.cis_id, base::HexEncode(rsp.metadata.data(), rsp.metadata.size()));

  return true;
}

bool ParseAseCtpNotification(struct ctp_ntf& ntf, uint16_t len, const uint8_t* value) {
  uint8_t num_entries;

  if (len < kCtpNtfMinLen) {
    log::error("Wrong len of ASE control point notification: {}", (int)len);
    return false;
  }

  STREAM_TO_UINT8(ntf.op, value);
  STREAM_TO_UINT8(num_entries, value);

  if (len != kCtpNtfMinLen + (num_entries * kCtpAseEntryMinLen)) {
    log::error("Wrong len of ASE control point notification (ASE IDs)");
    return false;
  }

  for (int i = 0; i < num_entries; i++) {
    struct ctp_ase_entry entry;

    STREAM_TO_UINT8(entry.ase_id, value);
    STREAM_TO_UINT8(entry.response_code, value);
    STREAM_TO_UINT8(entry.reason, value);

    ntf.entries.push_back(std::move(entry));
  }

  log::info("Control point notification\n\tOpcode: {} (0x{:x})\n\tNum ASE IDs: {}",
            ctp_opcode_map_string[ntf.op], ntf.op, (int)num_entries);
  for (size_t i = 0; i < num_entries; i++) {
    log::info(
            "\n\tASE ID[0x{:x}] response: {} (0x{:x}) reason: {} (0x{:x})", ntf.entries[i].ase_id,
            ctp_response_code_map_string[ntf.entries[i].response_code],
            ntf.entries[i].response_code,
            ((ctp_response_code_map.count(ntf.entries[i].response_code) != 0)
                     ? (*ctp_response_code_map[ntf.entries[i].response_code])[ntf.entries[i].reason]
                     : ""),
            ntf.entries[i].reason);
  }

  return true;
}

bool PrepareAseCtpCodecConfig(const std::vector<struct ctp_codec_conf>& confs,
                              std::vector<uint8_t>& value) {
  if (confs.size() == 0) {
    log::error("Configuration set is empty!");
    return false;
  }

  std::stringstream conf_ents_str;
  size_t msg_len = std::accumulate(
          confs.begin(), confs.end(), confs.size() * kCtpCodecConfMinLen + kAseNumSize + kCtpOpSize,
          [&conf_ents_str](size_t cur_len, auto const& conf) {
            if (utils::IsCodecUsingLtvFormat(conf.codec_id)) {
              types::LeAudioLtvMap ltv;
              if (ltv.Parse(conf.codec_config.data(), conf.codec_config.size())) {
                for (const auto& [type, value] : ltv.Values()) {
                  conf_ents_str << "\ttype: " << std::to_string(type)
                                << "\tlen: " << std::to_string(value.size())
                                << "\tdata: " << base::HexEncode(value.data(), value.size())
                                << "\n";
                }
                return cur_len + conf.codec_config.size();
              }
              log::error("Error parsing codec configuration LTV data.");
            }

            conf_ents_str << "\t"
                          << base::HexEncode(conf.codec_config.data(), conf.codec_config.size());
            return cur_len + conf.codec_config.size();
          });

  value.resize(msg_len);
  uint8_t* msg = value.data();
  UINT8_TO_STREAM(msg, kCtpOpcodeCodecConfiguration);

  UINT8_TO_STREAM(msg, confs.size());
  for (const struct ctp_codec_conf& conf : confs) {
    UINT8_TO_STREAM(msg, conf.ase_id);
    UINT8_TO_STREAM(msg, conf.target_latency);
    UINT8_TO_STREAM(msg, conf.target_phy);
    UINT8_TO_STREAM(msg, conf.codec_id.coding_format);
    UINT16_TO_STREAM(msg, conf.codec_id.vendor_company_id);
    UINT16_TO_STREAM(msg, conf.codec_id.vendor_codec_id);

    UINT8_TO_STREAM(msg, conf.codec_config.size());
    ARRAY_TO_STREAM(msg, conf.codec_config.data(), static_cast<int>(conf.codec_config.size()));

    log::info(
            "Codec configuration\n\tAse id: 0x{:x}\n\tTarget latency: "
            "0x{:x}\n\tTarget PHY: 0x{:x}\n\tCoding format: 0x{:x}\n\tVendor codec "
            "company ID: 0x{:x}\n\tVendor codec ID: 0x{:x}\n\tCodec config len: "
            "{}\n\tCodec spec conf: \n{}",
            conf.ase_id, conf.target_latency, conf.target_phy, conf.codec_id.coding_format,
            conf.codec_id.vendor_company_id, conf.codec_id.vendor_codec_id,
            static_cast<int>(conf.codec_config.size()), conf_ents_str.str());
  }

  return true;
}

bool PrepareAseCtpConfigQos(const std::vector<struct ctp_qos_conf>& confs,
                            std::vector<uint8_t>& value) {
  if (confs.size() == 0) {
    log::error("Configuration set is empty!");
    return false;
  }
  value.resize(confs.size() * kCtpQosConfMinLen + kAseNumSize + kCtpOpSize);

  uint8_t* msg = value.data();
  UINT8_TO_STREAM(msg, kCtpOpcodeQosConfiguration);
  UINT8_TO_STREAM(msg, confs.size());

  for (const struct ctp_qos_conf& conf : confs) {
    UINT8_TO_STREAM(msg, conf.ase_id);
    UINT8_TO_STREAM(msg, conf.cig);
    UINT8_TO_STREAM(msg, conf.cis);
    UINT24_TO_STREAM(msg, conf.sdu_interval);
    UINT8_TO_STREAM(msg, conf.framing);
    UINT8_TO_STREAM(msg, conf.phy);
    UINT16_TO_STREAM(msg, conf.max_sdu);
    UINT8_TO_STREAM(msg, conf.retrans_nb);
    UINT16_TO_STREAM(msg, conf.max_transport_latency);
    UINT24_TO_STREAM(msg, conf.pres_delay);

    log::info(
            "QoS configuration\n\tAse id: 0x{:x}\n\tcig: 0x{:x}\n\tCis: "
            "0x{:x}\n\tSDU interval: 0x{:x}\n\tFraming: 0x{:x}\n\tPhy: "
            "0x{:x}\n\tMax sdu size: 0x{:x}\n\tRetrans nb: 0x{:x}\n\tMax Transport "
            "latency: 0x{:x}\n\tPres delay: 0x{:x}",
            conf.ase_id, conf.cig, conf.cis, conf.sdu_interval, conf.framing, conf.phy,
            conf.max_sdu, conf.retrans_nb, conf.max_transport_latency, conf.pres_delay);
  }

  return true;
}

bool PrepareAseCtpEnable(const std::vector<struct ctp_enable>& confs, std::vector<uint8_t>& value) {
  if (confs.size() == 0) {
    log::error("Configuration set is empty!");
    return false;
  }

  if (confs.size() > UINT8_MAX) {
    log::error("To many ASEs to update metadata");
    return false;
  }

  uint16_t msg_len = confs.size() * kCtpEnableMinLen + kAseNumSize + kCtpOpSize;
  for (auto& conf : confs) {
    if (msg_len > GATT_MAX_ATTR_LEN) {
      log::error("Message length above GATT maximum");
      return false;
    }
    if (conf.metadata.size() > UINT8_MAX) {
      log::error("ase[{}] metadata length is invalid", conf.ase_id);
      return false;
    }

    msg_len += conf.metadata.size();
  }
  value.resize(msg_len);

  uint8_t* msg = value.data();
  UINT8_TO_STREAM(msg, kCtpOpcodeEnable);
  UINT8_TO_STREAM(msg, confs.size());

  for (const struct ctp_enable& conf : confs) {
    UINT8_TO_STREAM(msg, conf.ase_id);
    UINT8_TO_STREAM(msg, conf.metadata.size());
    ARRAY_TO_STREAM(msg, conf.metadata.data(), static_cast<int>(conf.metadata.size()));

    log::info("Enable\n\tAse id: 0x{:x}\n\tMetadata: {}", conf.ase_id,
              base::HexEncode(conf.metadata.data(), conf.metadata.size()));
  }

  return true;
}

bool PrepareAseCtpAudioReceiverStartReady(const std::vector<uint8_t>& ase_ids,
                                          std::vector<uint8_t>& value) {
  if (ase_ids.size() == 0) {
    log::error("ASEs ID set is empty!");
    return false;
  }
  value.resize(ase_ids.size() * kAseIdSize + kAseNumSize + kCtpOpSize);

  uint8_t* msg = value.data();
  UINT8_TO_STREAM(msg, kCtpOpcodeReceiverStartReady);
  UINT8_TO_STREAM(msg, ase_ids.size());

  for (const uint8_t& id : ase_ids) {
    UINT8_TO_STREAM(msg, id);

    log::info("ReceiverStartReady\n\tAse id: 0x{:x}", id);
  }

  return true;
}

bool PrepareAseCtpDisable(const std::vector<uint8_t>& ase_ids, std::vector<uint8_t>& value) {
  if (ase_ids.size() == 0) {
    log::error("ASEs ID set is empty!");
    return false;
  }
  value.resize(ase_ids.size() * kAseIdSize + kAseNumSize + kCtpOpSize);

  uint8_t* msg = value.data();
  UINT8_TO_STREAM(msg, kCtpOpcodeDisable);
  UINT8_TO_STREAM(msg, ase_ids.size());

  for (const uint8_t& id : ase_ids) {
    UINT8_TO_STREAM(msg, id);

    log::info("Disable\n\tAse id: 0x{:x}", id);
  }

  return true;
}

bool PrepareAseCtpAudioReceiverStopReady(const std::vector<uint8_t>& ase_ids,
                                         std::vector<uint8_t>& value) {
  if (ase_ids.size() == 0) {
    log::error("ASEs ID set is empty!");
    return false;
  }
  value.resize(ase_ids.size() * kAseIdSize + kAseNumSize + kCtpOpSize);

  uint8_t* msg = value.data();
  UINT8_TO_STREAM(msg, kCtpOpcodeReceiverStopReady);
  UINT8_TO_STREAM(msg, ase_ids.size());

  for (const uint8_t& ase_id : ase_ids) {
    UINT8_TO_STREAM(msg, ase_id);

    log::info("ReceiverStopReady\n\tAse id: 0x{:x}", ase_id);
  }

  return true;
}

bool PrepareAseCtpUpdateMetadata(const std::vector<struct ctp_update_metadata>& confs,
                                 std::vector<uint8_t>& value) {
  if (confs.size() == 0) {
    log::error("Configuration set is empty!");
    return false;
  }

  if (confs.size() > UINT8_MAX) {
    log::error("To many ASEs to update metadata");
    return false;
  }

  uint16_t msg_len = confs.size() * kCtpUpdateMetadataMinLen + kAseNumSize + kCtpOpSize;
  for (auto& conf : confs) {
    if (msg_len > GATT_MAX_ATTR_LEN) {
      log::error("Message length above GATT maximum");
      return false;
    }
    if (conf.metadata.size() > UINT8_MAX) {
      log::error("ase[{}] metadata length is invalid", conf.ase_id);
      return false;
    }

    msg_len += conf.metadata.size();
  }
  value.resize(msg_len);

  uint8_t* msg = value.data();
  UINT8_TO_STREAM(msg, kCtpOpcodeUpdateMetadata);
  UINT8_TO_STREAM(msg, confs.size());

  for (const struct ctp_update_metadata& conf : confs) {
    UINT8_TO_STREAM(msg, conf.ase_id);
    UINT8_TO_STREAM(msg, conf.metadata.size());
    ARRAY_TO_STREAM(msg, conf.metadata.data(), static_cast<int>(conf.metadata.size()));

    log::info("Update Metadata\n\tAse id: 0x{:x}\n\tMetadata: {}", conf.ase_id,
              base::HexEncode(conf.metadata.data(), conf.metadata.size()));
  }

  return true;
}

bool PrepareAseCtpRelease(const std::vector<uint8_t>& ase_ids, std::vector<uint8_t>& value) {
  if (ase_ids.size() == 0) {
    return true;
  }
  value.resize(ase_ids.size() * kAseIdSize + kAseNumSize + kCtpOpSize);

  uint8_t* msg = value.data();
  UINT8_TO_STREAM(msg, kCtpOpcodeRelease);
  UINT8_TO_STREAM(msg, ase_ids.size());

  for (const uint8_t& ase_id : ase_ids) {
    UINT8_TO_STREAM(msg, ase_id);

    log::info("Release\n\tAse id: 0x{:x}", ase_id);
  }

  return true;
}
}  // namespace ascs

namespace pacs {

int ParseSinglePac(std::vector<struct acs_ac_record>& pac_recs, uint16_t len,
                   const uint8_t* value) {
  struct acs_ac_record rec;
  uint8_t codec_spec_cap_len, metadata_len;

  if (len < kAcsPacRecordMinLen) {
    log::error("Wrong len of PAC record ({}!={})", len, kAcsPacRecordMinLen);
    pac_recs.clear();
    return -1;
  }

  STREAM_TO_UINT8(rec.codec_id.coding_format, value);
  STREAM_TO_UINT16(rec.codec_id.vendor_company_id, value);
  STREAM_TO_UINT16(rec.codec_id.vendor_codec_id, value);
  STREAM_TO_UINT8(codec_spec_cap_len, value);
  len -= kAcsPacRecordMinLen - kAcsPacMetadataLenLen;

  if (len < codec_spec_cap_len + kAcsPacMetadataLenLen) {
    log::error("Wrong len of PAC record (codec specific capabilities) ({}!={})", len,
               codec_spec_cap_len + kAcsPacMetadataLenLen);
    pac_recs.clear();
    return -1;
  }

  rec.codec_spec_caps_raw.assign(value, value + codec_spec_cap_len);

  if (utils::IsCodecUsingLtvFormat(rec.codec_id)) {
    if (!rec.codec_spec_caps.Parse(value, codec_spec_cap_len)) {
      log::error("Unable to parse codec specific parameters LTV: {}",
                 base::HexEncode(value, codec_spec_cap_len));
      return -1;
    }
  }

  value += codec_spec_cap_len;
  len -= codec_spec_cap_len;

  STREAM_TO_UINT8(metadata_len, value);
  len -= kAcsPacMetadataLenLen;

  if (len < metadata_len) {
    log::error("Wrong len of PAC record (metadata) ({}!={})", len, metadata_len);
    pac_recs.clear();
    return -1;
  }

  if (!rec.metadata.Parse(value, metadata_len)) {
    log::error("PAC record contains corrupted LTV formatted metadata: {}",
               base::HexEncode(value, metadata_len));
    return -1;
  }
  value += metadata_len;
  len -= metadata_len;

  pac_recs.push_back(std::move(rec));

  return len;
}

bool ParsePacs(std::vector<struct acs_ac_record>& pac_recs, uint16_t len, const uint8_t* value) {
  if (len < kAcsPacDiscoverRspMinLen) {
    log::error("Wrong len of PAC characteristic ({}!={})", len, kAcsPacDiscoverRspMinLen);
    return false;
  }

  uint8_t pac_rec_nb;
  STREAM_TO_UINT8(pac_rec_nb, value);
  len -= kAcsPacDiscoverRspMinLen;

  pac_recs.reserve(pac_rec_nb);
  for (int i = 0; i < pac_rec_nb; i++) {
    int remaining_len = ParseSinglePac(pac_recs, len, value);
    if (remaining_len < 0) {
      log::error("Error parsing PAC records.");
      return false;
    }

    value += (len - remaining_len);
    len = remaining_len;
  }

  return true;
}

bool ParseAudioLocations(types::AudioLocations& audio_locations, uint16_t len,
                         const uint8_t* value) {
  if (len != kAudioLocationsRspMinLen) {
    log::error("Wrong len of Audio Location characteristic");
    return false;
  }

  STREAM_TO_UINT32(audio_locations, value);

  log::info("Audio locations: {}", audio_locations.to_string());

  return true;
}

bool ParseSupportedAudioContexts(types::BidirectionalPair<types::AudioContexts>& contexts,
                                 uint16_t len, const uint8_t* value) {
  if (len != kAseAudioSuppContRspMinLen) {
    log::error("Wrong len of Audio Supported Context characteristic");
    return false;
  }

  STREAM_TO_UINT16(contexts.sink.value_ref(), value);
  STREAM_TO_UINT16(contexts.source.value_ref(), value);

  log::info(
          "Supported Audio Contexts: \n\tSupported Sink Contexts: {}\n\tSupported "
          "Source Contexts: {}",
          contexts.sink.to_string(), contexts.source.to_string());

  return true;
}

bool ParseAvailableAudioContexts(types::BidirectionalPair<types::AudioContexts>& contexts,
                                 uint16_t len, const uint8_t* value) {
  if (len != kAseAudioAvailRspMinLen) {
    log::error("Wrong len of Audio Availability characteristic");
    return false;
  }

  STREAM_TO_UINT16(contexts.sink.value_ref(), value);
  STREAM_TO_UINT16(contexts.source.value_ref(), value);

  log::info(
          "Available Audio Contexts: \n\tAvailable Sink Contexts: {}\n\tAvailable "
          "Source Contexts: {}",
          contexts.sink.to_string(), contexts.source.to_string());

  return true;
}
}  // namespace pacs

namespace tmap {

bool ParseTmapRole(std::bitset<16>& role, uint16_t len, const uint8_t* value) {
  if (len != kTmapRoleLen) {
    log::error(", Wrong len of Telephony Media Audio Profile Role, characteristic");
    return false;
  }

  STREAM_TO_UINT16(role, value);

  log::info(", Telephony Media Audio Profile Role:\n\tRole: {}", role.to_string());

  return true;
}
}  // namespace tmap

}  // namespace client_parser
}  // namespace bluetooth::le_audio