diff options
Diffstat (limited to 'audio/hal/audio_extn/dev_arbi.c')
| -rw-r--r-- | audio/hal/audio_extn/dev_arbi.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/audio/hal/audio_extn/dev_arbi.c b/audio/hal/audio_extn/dev_arbi.c new file mode 100644 index 0000000..d3c01c5 --- /dev/null +++ b/audio/hal/audio_extn/dev_arbi.c @@ -0,0 +1,169 @@ +/* + * 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} + }; + + 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*/ |