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 //
35 static const char* LDAC_ABR_LIB_NAME = "libldacBT_abr.so";
36 static void* ldac_abr_lib_handle = NULL;
37
38 static const char* LDAC_ABR_GET_HANDLE_NAME = "ldac_ABR_get_handle";
39 typedef HANDLE_LDAC_ABR (*tLDAC_ABR_GET_HANDLE)(void);
40
41 static const char* LDAC_ABR_FREE_HANDLE_NAME = "ldac_ABR_free_handle";
42 typedef void (*tLDAC_ABR_FREE_HANDLE)(HANDLE_LDAC_ABR hLdacAbr);
43
44 static const char* LDAC_ABR_INIT_NAME = "ldac_ABR_Init";
45 typedef int (*tLDAC_ABR_INIT)(HANDLE_LDAC_ABR hLdacAbr,
46 unsigned int interval_ms);
47
48 static const char* LDAC_ABR_SET_THRESHOLDS_NAME = "ldac_ABR_set_thresholds";
49 typedef 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
54 static const char* LDAC_ABR_PROC_NAME = "ldac_ABR_Proc";
55 typedef int (*tLDAC_ABR_PROC)(HANDLE_LDAC_BT hLdacParam,
56 HANDLE_LDAC_ABR hLdacAbr, unsigned int txq_length,
57 unsigned int flag_enable);
58
59 static tLDAC_ABR_GET_HANDLE ldac_abr_get_handle_func;
60 static tLDAC_ABR_FREE_HANDLE ldac_abr_free_handle_func;
61 static tLDAC_ABR_INIT ldac_abr_init_func;
62 static tLDAC_ABR_SET_THRESHOLDS ldac_abr_set_thresholds_func;
63 static tLDAC_ABR_PROC ldac_abr_proc_func;
64
A2DP_VendorLoadLdacAbr(void)65 bool 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
A2DP_VendorUnloadLdacAbr(void)131 void 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
a2dp_ldac_abr_get_handle(void)144 HANDLE_LDAC_ABR a2dp_ldac_abr_get_handle(void) {
145 return ldac_abr_get_handle_func();
146 }
147
a2dp_ldac_abr_free_handle(HANDLE_LDAC_ABR hLdacAbr)148 void a2dp_ldac_abr_free_handle(HANDLE_LDAC_ABR hLdacAbr) {
149 return ldac_abr_free_handle_func(hLdacAbr);
150 }
151
a2dp_ldac_abr_init(HANDLE_LDAC_ABR hLdacAbr,unsigned int interval_ms)152 int a2dp_ldac_abr_init(HANDLE_LDAC_ABR hLdacAbr, unsigned int interval_ms) {
153 return ldac_abr_init_func(hLdacAbr, interval_ms);
154 }
155
a2dp_ldac_abr_set_thresholds(HANDLE_LDAC_ABR hLdacAbr,unsigned int th_critical,unsigned int th_dangerous_trend,unsigned int th_4hqsq)156 int 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
a2dp_ldac_abr_proc(HANDLE_LDAC_BT hLdacParam,HANDLE_LDAC_ABR hLdacAbr,size_t transmit_queue_length,unsigned int flag_enable)164 int 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 }