android O中设置双MIC降噪,需要在build.prop添加属性"ro.vendor.audio.sdk.fluencetype"属性。
属性值位于hardware/qcom/audio/configs/msm8953/msm8953.mk
##fluencetype can be "fluence" or "fluencepro" or "none"
PRODUCT_PROPERTY_OVERRIDES += \
ro.vendor.audio.sdk.fluencetype=fluence\
persist.vendor.audio.fluence.voicecall=true\
persist.vendor.audio.fluence.voicerec=false\
persist.vendor.audio.fluence.speaker=true
代码解读位置:
hardware/qcom/audio/hal/audio_hw.c
struct audio_module HAL_MODULE_INFO_SYM = {
.common = {
.tag = HARDWARE_MODULE_TAG,
.module_api_version = AUDIO_MODULE_API_VERSION_0_1,
.hal_api_version = HARDWARE_HAL_API_VERSION,
.id = AUDIO_HARDWARE_MODULE_ID,
.name = "QCOM Audio HAL",
.author = "The Linux Foundation",
.methods = &hal_module_methods,
},
};
对应操作方法
static struct hw_module_methods_t hal_module_methods = {
.open = adev_open,
};
static int adev_open(const hw_module_t *module, const char *name,
hw_device_t **device)
{
......
adev->platform = platform_init(adev); // 平台初始化函数
if (!adev->platform) {
free(adev->snd_dev_ref_cnt);
free(adev);
ALOGE("%s: Failed to init platform data, aborting.", __func__);
*device = NULL;
pthread_mutex_unlock(&adev_init_lock);
pthread_mutex_destroy(&adev->lock);
return -EINVAL;
}
......
}
根据不同的芯片找到对应的文件
hardware/qcom/audio/hal/msm8916/platform.c
void *platform_init(struct audio_device *adev)
{
······
property_get("ro.vendor.audio.sdk.fluencetype", my_data->fluence_cap, ""); //解读属性值
if (!strncmp("fluencepro", my_data->fluence_cap, sizeof("fluencepro"))) {
my_data->fluence_type = FLUENCE_QUAD_MIC | FLUENCE_DUAL_MIC; // 4MIC或者双MIC
} else if (!strncmp("fluence", my_data->fluence_cap, sizeof("fluence"))) {
my_data->fluence_type = FLUENCE_DUAL_MIC; // 双MIC
} else {
my_data->fluence_type = FLUENCE_NONE; // 单MIC
}
if (my_data->fluence_type != FLUENCE_NONE) {
property_get("persist.vendor.audio.fluence.voicecall",value,"");
if (!strncmp("true", value, sizeof("true"))) {
my_data->fluence_in_voice_call = true;
}
property_get("persist.vendor.audio.fluence.voicerec",value,"");
if (!strncmp("true", value, sizeof("true"))) {
my_data->fluence_in_voice_rec = true;
}
property_get("persist.vendor.audio.fluence.audiorec",value,"");
if (!strncmp("true", value, sizeof("true"))) {
my_data->fluence_in_audio_rec = true;
}
property_get("persist.vendor.audio.fluence.speaker",value,"");
if (!strncmp("true", value, sizeof("true"))) {
my_data->fluence_in_spkr_mode = true;
}
property_get("persist.vendor.audio.fluence.mode",value,"");
if (!strncmp("broadside", value, sizeof("broadside"))) {
my_data->fluence_mode = FLUENCE_BROADSIDE;
}
property_get("persist.vendor.audio.fluence.hfpcall",value,"");
if (!strncmp("true", value, sizeof("true"))) {
my_data->fluence_in_hfp_call = true;
}
}
······
}
Tony Liu
2018-2-2