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/* clang-format off */
#include "cubeb-jni.h"
#include "cubeb-jni-instances.h"
#include <assert.h>
#include <atomic>
#include <initializer_list>
#include <jni.h>
/* clang-format on */
#define AUDIO_STREAM_TYPE_MUSIC 3
struct cubeb_jni {
jobject s_audio_manager_obj = nullptr;
jclass s_audio_manager_class = nullptr;
jmethodID s_audio_manager_get_output_latency_id = nullptr;
jmethodID s_audio_manager_set_mode_id = nullptr;
struct cubeb_fx_def {
jclass clazz = nullptr;
jmethodID static_function_is_available = nullptr;
} s_fxs[CUBEB_FX_SENTINEL__]{};
};
static constexpr const char *
cubeb_fx_name(cubeb_fx_type type)
{
switch (type) {
case CUBEB_FX_ACOUSTIC_ECHO_CANCELER:
return "android/media/audiofx/AcousticEchoCanceler";
case CUBEB_FX_AUTOMATIC_GAIN_CONTROL:
return "android/media/audiofx/AutomaticGainControl";
case CUBEB_FX_NOISE_SUPPRESSOR:
return "android/media/audiofx/NoiseSuppressor";
case CUBEB_FX_SENTINEL__:
return nullptr;
}
return nullptr;
}
extern "C" cubeb_jni *
cubeb_jni_init()
{
jobject ctx_obj = cubeb_jni_get_context_instance();
JNIEnv * jni_env = cubeb_get_jni_env_for_thread();
if (!jni_env || !ctx_obj) {
return nullptr;
}
cubeb_jni * cubeb_jni_ptr = new cubeb_jni;
assert(cubeb_jni_ptr);
{
// Find the audio manager object and make it global to call it from another
// method
jclass context_class = jni_env->FindClass("android/content/Context");
jfieldID audio_service_field = jni_env->GetStaticFieldID(
context_class, "AUDIO_SERVICE", "Ljava/lang/String;");
jstring jstr = (jstring)jni_env->GetStaticObjectField(context_class,
audio_service_field);
jmethodID get_system_service_id =
jni_env->GetMethodID(context_class, "getSystemService",
"(Ljava/lang/String;)Ljava/lang/Object;");
jobject audio_manager_obj =
jni_env->CallObjectMethod(ctx_obj, get_system_service_id, jstr);
cubeb_jni_ptr->s_audio_manager_obj =
reinterpret_cast<jobject>(jni_env->NewGlobalRef(audio_manager_obj));
jni_env->DeleteLocalRef(ctx_obj);
jni_env->DeleteLocalRef(context_class);
jni_env->DeleteLocalRef(jstr);
jni_env->DeleteLocalRef(audio_manager_obj);
}
{
// Make the audio manager class a global reference in order to preserve
// method id
jclass audio_manager_class =
jni_env->FindClass("android/media/AudioManager");
cubeb_jni_ptr->s_audio_manager_class =
reinterpret_cast<jclass>(jni_env->NewGlobalRef(audio_manager_class));
cubeb_jni_ptr->s_audio_manager_get_output_latency_id =
jni_env->GetMethodID(audio_manager_class, "getOutputLatency", "(I)I");
cubeb_jni_ptr->s_audio_manager_set_mode_id =
jni_env->GetMethodID(audio_manager_class, "setMode", "(I)V");
jni_env->DeleteLocalRef(audio_manager_class);
}
auto populate_fx_class = [&](cubeb_fx_type type) {
jclass c = jni_env->FindClass(cubeb_fx_name(type));
cubeb_jni::cubeb_fx_def & fx = cubeb_jni_ptr->s_fxs[type];
fx.clazz = reinterpret_cast<jclass>(jni_env->NewGlobalRef(c));
fx.static_function_is_available =
jni_env->GetStaticMethodID(c, "isAvailable", "()Z");
jni_env->DeleteLocalRef(c);
};
populate_fx_class(CUBEB_FX_ACOUSTIC_ECHO_CANCELER);
populate_fx_class(CUBEB_FX_AUTOMATIC_GAIN_CONTROL);
populate_fx_class(CUBEB_FX_NOISE_SUPPRESSOR);
return cubeb_jni_ptr;
}
extern "C" bool
cubeb_fx_is_available(cubeb_jni * cubeb_jni_ptr, cubeb_fx_type type)
{
JNIEnv * jni_env = cubeb_get_jni_env_for_thread();
cubeb_jni::cubeb_fx_def & fx = cubeb_jni_ptr->s_fxs[type];
return JNI_FALSE != jni_env->CallStaticBooleanMethod(
fx.clazz, fx.static_function_is_available);
}
extern "C" int
cubeb_audio_manager_get_output_latency(cubeb_jni * cubeb_jni_ptr)
{
assert(cubeb_jni_ptr);
JNIEnv * jni_env = cubeb_get_jni_env_for_thread();
return jni_env->CallIntMethod(
cubeb_jni_ptr->s_audio_manager_obj,
cubeb_jni_ptr->s_audio_manager_get_output_latency_id,
AUDIO_STREAM_TYPE_MUSIC); // param: AudioManager.STREAM_MUSIC
}
extern "C" void
cubeb_jni_destroy(cubeb_jni * cubeb_jni_ptr)
{
assert(cubeb_jni_ptr);
JNIEnv * jni_env = cubeb_get_jni_env_for_thread();
assert(jni_env);
jni_env->DeleteGlobalRef(cubeb_jni_ptr->s_audio_manager_obj);
jni_env->DeleteGlobalRef(cubeb_jni_ptr->s_audio_manager_class);
for (size_t i = 0; i < CUBEB_FX_SENTINEL__; ++i) {
jni_env->DeleteGlobalRef(cubeb_jni_ptr->s_fxs[i].clazz);
}
delete cubeb_jni_ptr;
}
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