a2dp_vendor_ldac_abr.cc revision 5b790feeeb211c42bf78ca3ae9c26aa30e516765 
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#define LOG_TAG "a2dp_vendor_ldac_abr"
18
19#include "a2dp_vendor_ldac_abr.h"
20
21#include <dlfcn.h>
22#include <inttypes.h>
23#include <stdio.h>
24#include <string.h>
25
26#include "osi/include/log.h"
27
28//
29// LDAC ABR(Adaptive Bit Rate) Source Code
30//
31
32//
33// The LDAC ABR shared library, and the functions to use
34//
35static const char* LDAC_ABR_LIB_NAME = "libldacBT_abr.so";
36static void* ldac_abr_lib_handle = NULL;
37
38static const char* LDAC_ABR_GET_HANDLE_NAME = "ldac_ABR_get_handle";
39typedef HANDLE_LDAC_ABR (*tLDAC_ABR_GET_HANDLE)(void);
40
41static const char* LDAC_ABR_FREE_HANDLE_NAME = "ldac_ABR_free_handle";
42typedef void (*tLDAC_ABR_FREE_HANDLE)(HANDLE_LDAC_ABR hLdacAbr);
43
44static const char* LDAC_ABR_INIT_NAME = "ldac_ABR_Init";
45typedef int (*tLDAC_ABR_INIT)(HANDLE_LDAC_ABR hLdacAbr,
46                              unsigned int interval_ms);
47
48static const char* LDAC_ABR_SET_THRESHOLDS_NAME = "ldac_ABR_set_thresholds";
49typedef int (*tLDAC_ABR_SET_THRESHOLDS)(HANDLE_LDAC_ABR hLdacAbr,
50                                        unsigned int th_critical,
51                                        unsigned int th_dangerous_trend,
52                                        unsigned int th_safety_4hqsq);
53
54static const char* LDAC_ABR_PROC_NAME = "ldac_ABR_Proc";
55typedef int (*tLDAC_ABR_PROC)(HANDLE_LDAC_BT hLdacParam,
56                              HANDLE_LDAC_ABR hLdacAbr, unsigned int txq_length,
57                              unsigned int flag_enable);
58
59static tLDAC_ABR_GET_HANDLE ldac_abr_get_handle_func;
60static tLDAC_ABR_FREE_HANDLE ldac_abr_free_handle_func;
61static tLDAC_ABR_INIT ldac_abr_init_func;
62static tLDAC_ABR_SET_THRESHOLDS ldac_abr_set_thresholds_func;
63static tLDAC_ABR_PROC ldac_abr_proc_func;
64
65bool A2DP_VendorLoadLdacAbr(void) {
66  if (ldac_abr_lib_handle != NULL) return true;  // Already loaded
67
68  // Open the LDAC ABR library
69  ldac_abr_lib_handle = dlopen(LDAC_ABR_LIB_NAME, RTLD_NOW);
70  if (ldac_abr_lib_handle == NULL) {
71    LOG_ERROR(LOG_TAG, "%s: cannot open LDAC ABR library %s: %s", __func__,
72              LDAC_ABR_LIB_NAME, dlerror());
73    A2DP_VendorUnloadLdacAbr();
74    return false;
75  }
76
77  // Load all functions
78  ldac_abr_get_handle_func = (tLDAC_ABR_GET_HANDLE)dlsym(
79      ldac_abr_lib_handle, LDAC_ABR_GET_HANDLE_NAME);
80  if (ldac_abr_get_handle_func == NULL) {
81    LOG_ERROR(LOG_TAG,
82              "%s: cannot find function '%s' in the LDAC ABR library: %s",
83              __func__, LDAC_ABR_GET_HANDLE_NAME, dlerror());
84    A2DP_VendorUnloadLdacAbr();
85    return false;
86  }
87
88  ldac_abr_free_handle_func = (tLDAC_ABR_FREE_HANDLE)dlsym(
89      ldac_abr_lib_handle, LDAC_ABR_FREE_HANDLE_NAME);
90  if (ldac_abr_free_handle_func == NULL) {
91    LOG_ERROR(LOG_TAG,
92              "%s: cannot find function '%s' in the LDAC ABR library: %s",
93              __func__, LDAC_ABR_FREE_HANDLE_NAME, dlerror());
94    A2DP_VendorUnloadLdacAbr();
95    return false;
96  }
97
98  ldac_abr_init_func =
99      (tLDAC_ABR_INIT)dlsym(ldac_abr_lib_handle, LDAC_ABR_INIT_NAME);
100  if (ldac_abr_init_func == NULL) {
101    LOG_ERROR(LOG_TAG,
102              "%s: cannot find function '%s' in the LDAC ABR library: %s",
103              __func__, LDAC_ABR_INIT_NAME, dlerror());
104    A2DP_VendorUnloadLdacAbr();
105    return false;
106  }
107
108  ldac_abr_set_thresholds_func = (tLDAC_ABR_SET_THRESHOLDS)dlsym(
109      ldac_abr_lib_handle, LDAC_ABR_SET_THRESHOLDS_NAME);
110  if (ldac_abr_set_thresholds_func == NULL) {
111    LOG_ERROR(LOG_TAG,
112              "%s: cannot find function '%s' in the LDAC ABR library: %s",
113              __func__, LDAC_ABR_SET_THRESHOLDS_NAME, dlerror());
114    A2DP_VendorUnloadLdacAbr();
115    return false;
116  }
117
118  ldac_abr_proc_func =
119      (tLDAC_ABR_PROC)dlsym(ldac_abr_lib_handle, LDAC_ABR_PROC_NAME);
120  if (ldac_abr_proc_func == NULL) {
121    LOG_ERROR(LOG_TAG,
122              "%s: cannot find function '%s' in the LDAC ABR library: %s",
123              __func__, LDAC_ABR_PROC_NAME, dlerror());
124    A2DP_VendorUnloadLdacAbr();
125    return false;
126  }
127
128  return true;
129}
130
131void A2DP_VendorUnloadLdacAbr(void) {
132  ldac_abr_get_handle_func = NULL;
133  ldac_abr_free_handle_func = NULL;
134  ldac_abr_init_func = NULL;
135  ldac_abr_set_thresholds_func = NULL;
136  ldac_abr_proc_func = NULL;
137
138  if (ldac_abr_lib_handle != NULL) {
139    dlclose(ldac_abr_lib_handle);
140    ldac_abr_lib_handle = NULL;
141  }
142}
143
144HANDLE_LDAC_ABR a2dp_ldac_abr_get_handle(void) {
145  return ldac_abr_get_handle_func();
146}
147
148void a2dp_ldac_abr_free_handle(HANDLE_LDAC_ABR hLdacAbr) {
149  return ldac_abr_free_handle_func(hLdacAbr);
150}
151
152int a2dp_ldac_abr_init(HANDLE_LDAC_ABR hLdacAbr, unsigned int interval_ms) {
153  return ldac_abr_init_func(hLdacAbr, interval_ms);
154}
155
156int a2dp_ldac_abr_set_thresholds(HANDLE_LDAC_ABR hLdacAbr,
157                                 unsigned int th_critical,
158                                 unsigned int th_dangerous_trend,
159                                 unsigned int th_4hqsq) {
160  return ldac_abr_set_thresholds_func(hLdacAbr, th_critical, th_dangerous_trend,
161                                      th_4hqsq);
162}
163
164int a2dp_ldac_abr_proc(HANDLE_LDAC_BT hLdacParam, HANDLE_LDAC_ABR hLdacAbr,
165                       size_t transmit_queue_length, unsigned int flag_enable) {
166  return ldac_abr_proc_func(hLdacParam, hLdacAbr, transmit_queue_length,
167                            flag_enable);
168}