1/* 2 * Copyright (c) 2014, The Linux Foundation. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * * Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * * Redistributions in binary form must reproduce the above 10 * copyright notice, this list of conditions and the following 11 * disclaimer in the documentation and/or other materials provided 12 * with the distribution. 13 * * Neither the name of The Linux Foundation nor the names of its 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30#define LOG_TAG "audio_hw_dev_arbi" 31/*#define LOG_NDEBUG 0*/ 32#define LOG_NDDEBUG 0 33 34#include <errno.h> 35#include <cutils/log.h> 36#include <fcntl.h> 37#include "audio_hw.h" 38#include "platform.h" 39#include "platform_api.h" 40#include <sys/stat.h> 41#include <stdlib.h> 42#include <dlfcn.h> 43#include <cutils/properties.h> 44#include "audio_extn.h" 45 46#ifdef DEV_ARBI_ENABLED 47 48typedef int (init_fn_t)(); 49typedef int (deinit_fn_t)(); 50typedef int (acquire_fn_t)(audio_devices_t aud_dev); 51typedef int (release_fn_t)(audio_devices_t aud_dev); 52 53typedef struct { 54 snd_device_t snd_device; 55 audio_devices_t aud_device; 56} snd_aud_dev_mapping_t; 57 58static void* lib_handle = NULL; 59 60static init_fn_t *init_fp = NULL; 61static deinit_fn_t *deinit_fp = NULL; 62static acquire_fn_t *acquire_fp = NULL; 63static release_fn_t *release_fp = NULL; 64 65static int load_dev_arbi_lib() 66{ 67 int rc = -EINVAL; 68 69 if (lib_handle != NULL) { 70 ALOGE("%s: library already loaded", __func__); 71 return rc; 72 } 73 74 lib_handle = dlopen("libaudiodevarb.so", RTLD_NOW); 75 if (lib_handle != NULL) { 76 init_fp = (init_fn_t*)dlsym(lib_handle, "aud_dev_arbi_server_init"); 77 deinit_fp = (deinit_fn_t*)dlsym(lib_handle, "aud_dev_arbi_server_deinit"); 78 acquire_fp = (acquire_fn_t*)dlsym(lib_handle, "aud_dev_arbi_server_acquire"); 79 release_fp = (release_fn_t*)dlsym(lib_handle, "aud_dev_arbi_server_release"); 80 81 if ((init_fp == NULL) || 82 (deinit_fp == NULL) || 83 (acquire_fp == NULL) || 84 (release_fp == NULL)) { 85 86 ALOGE("%s: error loading symbols from library", __func__); 87 88 init_fp = NULL; 89 deinit_fp = NULL; 90 acquire_fp = NULL; 91 release_fp = NULL; 92 } else 93 return 0; 94 } 95 96 return rc; 97} 98 99int audio_extn_dev_arbi_init() 100{ 101 int rc = load_dev_arbi_lib(); 102 if (!rc) 103 rc = init_fp(); 104 105 return rc; 106} 107 108int audio_extn_dev_arbi_deinit() 109{ 110 int rc = -EINVAL; 111 112 if(deinit_fp != NULL) { 113 rc = deinit_fp(); 114 115 init_fp = NULL; 116 deinit_fp = NULL; 117 acquire_fp = NULL; 118 release_fp = NULL; 119 120 dlclose(lib_handle); 121 lib_handle = NULL; 122 } 123 124 return rc; 125} 126 127static audio_devices_t get_audio_device(snd_device_t snd_device) 128{ 129 static snd_aud_dev_mapping_t snd_aud_dev_map[] = { 130 {SND_DEVICE_OUT_HANDSET, AUDIO_DEVICE_OUT_EARPIECE}, 131 {SND_DEVICE_OUT_VOICE_HANDSET, AUDIO_DEVICE_OUT_EARPIECE} 132 }; 133 134 audio_devices_t aud_device = AUDIO_DEVICE_NONE; 135 uint32_t ind = 0; 136 137 for (ind = 0; ind < ARRAY_SIZE(snd_aud_dev_map); ++ind) { 138 if (snd_device == snd_aud_dev_map[ind].snd_device) { 139 aud_device = snd_aud_dev_map[ind].aud_device; 140 break; 141 } 142 } 143 144 return aud_device; 145} 146 147int audio_extn_dev_arbi_acquire(snd_device_t snd_device) 148{ 149 int rc = -EINVAL; 150 audio_devices_t audio_device = get_audio_device(snd_device); 151 152 if ((acquire_fp != NULL) && (audio_device != AUDIO_DEVICE_NONE)) 153 rc = acquire_fp(audio_device); 154 155 return rc; 156} 157 158int audio_extn_dev_arbi_release(snd_device_t snd_device) 159{ 160 int rc = -EINVAL; 161 audio_devices_t audio_device = get_audio_device(snd_device); 162 163 if ((release_fp != NULL) && (audio_device != AUDIO_DEVICE_NONE)) 164 rc = release_fp(audio_device); 165 166 return rc; 167} 168 169#endif /*DEV_ARBI_ENABLED*/ 170