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      1 /*
      2  * Copyright 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 //
     18 // Interface to the A2DP LDAC ABR
     19 //
     20 
     21 #ifndef A2DP_VENDOR_LDAC_ABR_H
     22 #define A2DP_VENDOR_LDAC_ABR_H
     23 
     24 #include <stdio.h>
     25 
     26 #include <ldacBT_abr.h>
     27 
     28 // Initial EQMID for ABR mode.
     29 #define LDAC_ABR_MODE_EQMID LDACBT_EQMID_SQ
     30 
     31 // Loads the LDAC ABR library.
     32 // Return true on success, otherwise false.
     33 bool A2DP_VendorLoadLdacAbr(void);
     34 
     35 // Unloads the LDAC ABR library.
     36 void A2DP_VendorUnloadLdacAbr(void);
     37 
     38 // Gets the LDAC ABR handle.
     39 // Return the LDAC ABR handle.
     40 HANDLE_LDAC_ABR a2dp_ldac_abr_get_handle(void);
     41 
     42 // Free the LDAC ABR handle.
     43 void a2dp_ldac_abr_free_handle(HANDLE_LDAC_ABR hLdacAbr);
     44 
     45 // Initializes the LDAC ABR handle.
     46 // Return 0 on success, or -1 on failure.
     47 int a2dp_ldac_abr_init(HANDLE_LDAC_ABR hLdacAbr, unsigned int interval_ms);
     48 
     49 // Sets thresholds for the LDAC ABR handle.
     50 // Return 0 on success, or -1 on failure.
     51 int a2dp_ldac_abr_set_thresholds(HANDLE_LDAC_ABR hLdacAbr,
     52                                  unsigned int th_critical,
     53                                  unsigned int th_dangerous_trend,
     54                                  unsigned int th_4hqsq);
     55 
     56 // LDAC ABR main process.
     57 // It controls LDAC encoder bit rate based on A2DP transmit queue length.
     58 // return current EQMID of LDAC encoder.
     59 int a2dp_ldac_abr_proc(HANDLE_LDAC_BT hLdacParam, HANDLE_LDAC_ABR hLdacAbr,
     60                        size_t transmit_queue_length, unsigned int flag_enable);
     61 
     62 #endif  // A2DP_VENDOR_LDAC_ENCODER_H
     63