| /* |
| * Copyright (c) 2014, The Linux Foundation. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * * Neither the name of The Linux Foundation nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #define LOG_TAG "audio_hw_dev_arbi" |
| /*#define LOG_NDEBUG 0*/ |
| #define LOG_NDDEBUG 0 |
| |
| #include <errno.h> |
| #include <cutils/log.h> |
| #include <fcntl.h> |
| #include "audio_hw.h" |
| #include "platform.h" |
| #include "platform_api.h" |
| #include <sys/stat.h> |
| #include <stdlib.h> |
| #include <dlfcn.h> |
| #include <cutils/properties.h> |
| #include "audio_extn.h" |
| |
| #ifdef DEV_ARBI_ENABLED |
| |
| typedef int (init_fn_t)(); |
| typedef int (deinit_fn_t)(); |
| typedef int (acquire_fn_t)(audio_devices_t aud_dev); |
| typedef int (release_fn_t)(audio_devices_t aud_dev); |
| |
| typedef struct { |
| snd_device_t snd_device; |
| audio_devices_t aud_device; |
| } snd_aud_dev_mapping_t; |
| |
| static void* lib_handle = NULL; |
| |
| static init_fn_t *init_fp = NULL; |
| static deinit_fn_t *deinit_fp = NULL; |
| static acquire_fn_t *acquire_fp = NULL; |
| static release_fn_t *release_fp = NULL; |
| |
| static int load_dev_arbi_lib() |
| { |
| int rc = -EINVAL; |
| |
| if (lib_handle != NULL) { |
| ALOGE("%s: library already loaded", __func__); |
| return rc; |
| } |
| |
| lib_handle = dlopen("libaudiodevarb.so", RTLD_NOW); |
| if (lib_handle != NULL) { |
| init_fp = (init_fn_t*)dlsym(lib_handle, "aud_dev_arbi_server_init"); |
| deinit_fp = (deinit_fn_t*)dlsym(lib_handle, "aud_dev_arbi_server_deinit"); |
| acquire_fp = (acquire_fn_t*)dlsym(lib_handle, "aud_dev_arbi_server_acquire"); |
| release_fp = (release_fn_t*)dlsym(lib_handle, "aud_dev_arbi_server_release"); |
| |
| if ((init_fp == NULL) || |
| (deinit_fp == NULL) || |
| (acquire_fp == NULL) || |
| (release_fp == NULL)) { |
| |
| ALOGE("%s: error loading symbols from library", __func__); |
| |
| init_fp = NULL; |
| deinit_fp = NULL; |
| acquire_fp = NULL; |
| release_fp = NULL; |
| } else |
| return 0; |
| } |
| |
| return rc; |
| } |
| |
| int audio_extn_dev_arbi_init() |
| { |
| int rc = load_dev_arbi_lib(); |
| if (!rc) |
| rc = init_fp(); |
| |
| return rc; |
| } |
| |
| int audio_extn_dev_arbi_deinit() |
| { |
| int rc = -EINVAL; |
| |
| if(deinit_fp != NULL) { |
| rc = deinit_fp(); |
| |
| init_fp = NULL; |
| deinit_fp = NULL; |
| acquire_fp = NULL; |
| release_fp = NULL; |
| |
| dlclose(lib_handle); |
| lib_handle = NULL; |
| } |
| |
| return rc; |
| } |
| |
| static audio_devices_t get_audio_device(snd_device_t snd_device) |
| { |
| static snd_aud_dev_mapping_t snd_aud_dev_map[] = { |
| {SND_DEVICE_OUT_HANDSET, AUDIO_DEVICE_OUT_EARPIECE}, |
| {SND_DEVICE_OUT_VOICE_HANDSET, AUDIO_DEVICE_OUT_EARPIECE}, |
| {SND_DEVICE_OUT_SPEAKER, AUDIO_DEVICE_OUT_SPEAKER}, |
| {SND_DEVICE_OUT_VOICE_SPEAKER, AUDIO_DEVICE_OUT_SPEAKER}, |
| {SND_DEVICE_OUT_HEADPHONES, AUDIO_DEVICE_OUT_WIRED_HEADPHONE}, |
| {SND_DEVICE_OUT_VOICE_HEADPHONES, AUDIO_DEVICE_OUT_WIRED_HEADPHONE}, |
| {SND_DEVICE_OUT_SPEAKER_AND_HEADPHONES, |
| AUDIO_DEVICE_OUT_SPEAKER | AUDIO_DEVICE_OUT_WIRED_HEADPHONE} |
| }; |
| |
| audio_devices_t aud_device = AUDIO_DEVICE_NONE; |
| uint32_t ind = 0; |
| |
| for (ind = 0; ind < ARRAY_SIZE(snd_aud_dev_map); ++ind) { |
| if (snd_device == snd_aud_dev_map[ind].snd_device) { |
| aud_device = snd_aud_dev_map[ind].aud_device; |
| break; |
| } |
| } |
| |
| return aud_device; |
| } |
| |
| int audio_extn_dev_arbi_acquire(snd_device_t snd_device) |
| { |
| int rc = -EINVAL; |
| audio_devices_t audio_device = get_audio_device(snd_device); |
| |
| if ((acquire_fp != NULL) && (audio_device != AUDIO_DEVICE_NONE)) |
| rc = acquire_fp(audio_device); |
| |
| return rc; |
| } |
| |
| int audio_extn_dev_arbi_release(snd_device_t snd_device) |
| { |
| int rc = -EINVAL; |
| audio_devices_t audio_device = get_audio_device(snd_device); |
| |
| if ((release_fp != NULL) && (audio_device != AUDIO_DEVICE_NONE)) |
| rc = release_fp(audio_device); |
| |
| return rc; |
| } |
| |
| #endif /*DEV_ARBI_ENABLED*/ |