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/*
**
** Copyright 2016, The CyanogenMod Project
**
** Licensed under the Apache License, Version 2.0 (the "License");
** you may not use this file except in compliance with the License.
** You may obtain a copy of the License at
**
** http://www.apache.org/licenses/LICENSE-2.0
**
** Unless required by applicable law or agreed to in writing, software
** distributed under the License is distributed on an "AS IS" BASIS,
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
** See the License for the specific language governing permissions and
** limitations under the License.
*/
//#define LOG_NDEBUG 0
#define LOG_TAG "CMAudioService-JNI"
#include <utils/Log.h>
#include <JNIHelp.h>
#include <jni.h>
#include "core_jni_helpers.h"
#include "android_media_AudioErrors.h"
#include "android_runtime/AndroidRuntime.h"
#include <media/AudioSystem.h>
#include <media/AudioSession.h>
#include <system/audio.h>
#include <utils/threads.h>
// ----------------------------------------------------------------------------
namespace android {
static jclass gArrayListClass;
static struct {
jmethodID add;
jmethodID toArray;
} gArrayListMethods;
static struct {
jmethodID postAudioSessionEventFromNative;
} gAudioSessionEventHandlerMethods;
static jclass gAudioSessionInfoClass;
static jmethodID gAudioSessionInfoCstor;
static jobject gThiz;
static Mutex gCallbackLock;
// ----------------------------------------------------------------------------
static void
org_cyanogenmod_cmaudio_service_CMAudioService_session_info_callback(int event,
sp<AudioSessionInfo>& info, bool added)
{
AutoMutex _l(gCallbackLock);
if (gThiz == NULL) {
ALOGE("gThiz iz null");
return;
}
JNIEnv *env = AndroidRuntime::getJNIEnv();
jobject jSession = env->NewObject(gAudioSessionInfoClass, gAudioSessionInfoCstor,
info->mSessionId, info->mStream, info->mFlags, info->mChannelMask, info->mUid);
env->CallVoidMethod(gThiz,
gAudioSessionEventHandlerMethods.postAudioSessionEventFromNative,
event, jSession, added);
env->DeleteLocalRef(jSession);
}
JNIEXPORT void JNICALL
org_cyanogenmod_cmaudio_service_registerAudioSessionCallback(JNIEnv *env, jobject thiz,
jboolean enabled)
{
ALOGV("registerAudioSessionCallback %d", enabled);
if (enabled) {
if (gThiz == NULL) {
gThiz = env->NewGlobalRef(thiz);
}
} else {
if (gThiz != NULL) {
env->DeleteGlobalRef(gThiz);
gThiz = NULL;
}
}
AudioSystem::setAudioSessionCallback(enabled ?
org_cyanogenmod_cmaudio_service_CMAudioService_session_info_callback : NULL);
}
JNIEXPORT jint JNICALL org_cyanogenmod_cmaudio_service_CMAudioService_listAudioSessions(JNIEnv *env,
jobject thiz, jint streams, jobject jSessions)
{
ALOGV("listAudioSessions");
if (jSessions == NULL) {
ALOGE("listAudioSessions NULL arraylist");
return (jint)AUDIO_JAVA_BAD_VALUE;
}
if (!env->IsInstanceOf(jSessions, gArrayListClass)) {
ALOGE("listAudioSessions not an arraylist");
return (jint)AUDIO_JAVA_BAD_VALUE;
}
status_t status;
Vector< sp<AudioSessionInfo>> sessions;
status = AudioSystem::listAudioSessions((audio_stream_type_t)streams, sessions);
if (status != NO_ERROR) {
ALOGE("AudioSystem::listAudioSessions error %d", status);
} else {
ALOGV("AudioSystem::listAudioSessions count=%zu", sessions.size());
}
jint jStatus = nativeToJavaStatus(status);
if (jStatus != AUDIO_JAVA_SUCCESS) {
goto exit;
}
for (size_t i = 0; i < sessions.size(); i++) {
const sp<AudioSessionInfo>& s = sessions.itemAt(i);
jobject jSession = env->NewObject(gAudioSessionInfoClass, gAudioSessionInfoCstor,
s->mSessionId, s->mStream, s->mFlags, s->mChannelMask, s->mUid);
if (jSession == NULL) {
jStatus = (jint)AUDIO_JAVA_ERROR;
goto exit;
}
env->CallBooleanMethod(jSessions, gArrayListMethods.add, jSession);
env->DeleteLocalRef(jSession);
}
exit:
return jStatus;
}
} /* namespace android */
// ----------------------------------------------------------------------------
static const char* const kClassPathName = "org/cyanogenmod/cmaudio/service/CMAudioService";
static JNINativeMethod gMethods[] = {
{"native_listAudioSessions", "(ILjava/util/ArrayList;)I",
(void *)android::org_cyanogenmod_cmaudio_service_CMAudioService_listAudioSessions},
{"native_registerAudioSessionCallback", "(Z)V",
(void *)android::org_cyanogenmod_cmaudio_service_registerAudioSessionCallback},
};
static int registerNativeMethods(JNIEnv* env, const char* className,
JNINativeMethod* gMethods, int numMethods) {
jclass clazz;
clazz = env->FindClass(className);
if (clazz == NULL) {
ALOGE("Native registration unable to find class '%s'", className);
return JNI_FALSE;
}
if (env->RegisterNatives(clazz, gMethods, numMethods) < 0) {
ALOGE("RegisterNatives failed for '%s'", className);
return JNI_FALSE;
}
return JNI_TRUE;
}
jint JNI_OnLoad(JavaVM* vm, void* reserved)
{
ALOGV("OnLoad");
JNIEnv* env = 0;
if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
ALOGE("Error: GetEnv failed in JNI_OnLoad");
return -1;
}
jclass serviceClass = env->FindClass(kClassPathName);
if (!serviceClass) {
ALOGE("Failed to get class reference");
return -1;
}
if (!registerNativeMethods(env, kClassPathName, gMethods, NELEM(gMethods))) {
ALOGE("Error: could not register native methods cmaudio service");
return -1;
}
jclass arrayListClass = android::FindClassOrDie(env, "java/util/ArrayList");
android::gArrayListClass = android::MakeGlobalRefOrDie(env, arrayListClass);
android::gArrayListMethods.add = android::GetMethodIDOrDie(env, arrayListClass, "add",
"(Ljava/lang/Object;)Z");
android::gArrayListMethods.toArray = android::GetMethodIDOrDie(env, arrayListClass,
"toArray", "()[Ljava/lang/Object;");
jclass audioSessionInfoClass = android::FindClassOrDie(env,
"cyanogenmod/media/AudioSessionInfo");
android::gAudioSessionInfoClass = android::MakeGlobalRefOrDie(env, audioSessionInfoClass);
android::gAudioSessionInfoCstor = android::GetMethodIDOrDie(env, audioSessionInfoClass,
"<init>", "(IIIII)V");
android::gAudioSessionEventHandlerMethods.postAudioSessionEventFromNative =
android::GetMethodIDOrDie(env, env->FindClass(kClassPathName),
"audioSessionCallbackFromNative", "(ILcyanogenmod/media/AudioSessionInfo;Z)V");
ALOGV("loaded successfully!!!");
return JNI_VERSION_1_6;
}
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