godot/platform/android/audio_driver_jandroid.cpp

/*************************************************************************/
/*  audio_driver_jandroid.cpp                                            */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
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/* distribute, sublicense, and/or sell copies of the Software, and to    */
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/* the following conditions:                                             */
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/* The above copyright notice and this permission notice shall be        */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
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#include "audio_driver_jandroid.h"

#include "globals.h"
#include "os/os.h"
#include "thread_jandroid.h"

#ifndef ANDROID_NATIVE_ACTIVITY

AudioDriverAndroid* AudioDriverAndroid::s_ad=NULL;

jobject AudioDriverAndroid::io;
jmethodID AudioDriverAndroid::_init_audio;
jmethodID AudioDriverAndroid::_write_buffer;
jmethodID AudioDriverAndroid::_quit;
jmethodID AudioDriverAndroid::_pause;
bool AudioDriverAndroid::active=false;
jclass AudioDriverAndroid::cls;
int AudioDriverAndroid::audioBufferFrames=0;
int AudioDriverAndroid::mix_rate=44100;
bool AudioDriverAndroid::quit=false;
jobject AudioDriverAndroid::audioBuffer = NULL;
void* AudioDriverAndroid::audioBufferPinned = NULL;
Mutex *AudioDriverAndroid::mutex=NULL;
int32_t* AudioDriverAndroid::audioBuffer32=NULL;


const char* AudioDriverAndroid::get_name() const {

	return "Android";
}


Error AudioDriverAndroid::init(){

	mutex = Mutex::create();
/*
	// TODO: pass in/return a (Java) device ID, also whether we're opening for input or output
	   this->spec.samples = Android_JNI_OpenAudioDevice(this->spec.freq, this->spec.format == AUDIO_U8 ? 0 : 1, this->spec.channels, this->spec.samples);
	   SDL_CalculateAudioSpec(&this->spec);

	   if (this->spec.samples == 0) {
	       // Init failed?
	       SDL_SetError("Java-side initialization failed!");
	       return 0;
	   }
*/

	//Android_JNI_SetupThread();


  //        __android_log_print(ANDROID_LOG_VERBOSE, "SDL", "SDL audio: opening device");


	JNIEnv *env = ThreadAndroid::get_env();
	int mix_rate = GLOBAL_DEF("audio/mix_rate",44100);

	int latency = GLOBAL_DEF("audio/output_latency",25);
	latency=50;
	unsigned int buffer_size = nearest_power_of_2( latency * mix_rate / 1000 );
	if (OS::get_singleton()->is_stdout_verbose()) {
		print_line("audio buffer size: "+itos(buffer_size));
	}

	__android_log_print(ANDROID_LOG_INFO,"godot","Initializing audio! params: %i,%i ",mix_rate,buffer_size);
	audioBuffer = env->CallObjectMethod(io,_init_audio, mix_rate, buffer_size);


	ERR_FAIL_COND_V( audioBuffer == NULL, ERR_INVALID_PARAMETER);

	audioBuffer = env->NewGlobalRef(audioBuffer);

	jboolean isCopy = JNI_FALSE;
	audioBufferPinned = env->GetShortArrayElements((jshortArray)audioBuffer, &isCopy);
	audioBufferFrames = env->GetArrayLength((jshortArray)audioBuffer);
	audioBuffer32 = memnew_arr(int32_t,audioBufferFrames);

	return OK;
}

void AudioDriverAndroid::start(){
	active=true;

}

void AudioDriverAndroid::setup( jobject p_io) {

	JNIEnv *env = ThreadAndroid::get_env();
	io=p_io;

	jclass c = env->GetObjectClass(io);
	cls = (jclass)env->NewGlobalRef(c);


	__android_log_print(ANDROID_LOG_INFO,"godot","starting to attempt get methods");

	_init_audio = env->GetMethodID(cls, "audioInit", "(II)Ljava/lang/Object;");
	if(_init_audio != 0) {
		__android_log_print(ANDROID_LOG_INFO,"godot","*******GOT METHOD _init_audio ok!!");
	} else {
		__android_log_print(ANDROID_LOG_INFO,"godot","audioinit ok!");
	}

	_write_buffer = env->GetMethodID(cls, "audioWriteShortBuffer", "([S)V");
	if(_write_buffer != 0) {
		__android_log_print(ANDROID_LOG_INFO,"godot","*******GOT METHOD _write_buffer ok!!");
	}


	_quit = env->GetMethodID(cls, "audioQuit", "()V");
	if(_quit != 0) {
		__android_log_print(ANDROID_LOG_INFO,"godot","*******GOT METHOD _quit ok!!");
	}

	_pause = env->GetMethodID(cls, "audioPause", "(Z)V");
	if(_quit != 0) {
		__android_log_print(ANDROID_LOG_INFO,"godot","*******GOT METHOD _pause ok!!");
	}


}

void AudioDriverAndroid::thread_func(JNIEnv *env) {

	jclass cls = env->FindClass("org/godotengine/godot/Godot");
	if (cls) {

		cls=(jclass)env->NewGlobalRef(cls);
		__android_log_print(ANDROID_LOG_INFO,"godot","*******CLASS FOUND!!!");
	}
	jfieldID fid = env->GetStaticFieldID(cls, "io", "Lorg/godotengine/godot/GodotIO;");
	jobject ob = env->GetStaticObjectField(cls,fid);
	jobject gob = env->NewGlobalRef(ob);
	jclass c = env->GetObjectClass(gob);
	jclass lcls = (jclass)env->NewGlobalRef(c);
	_write_buffer = env->GetMethodID(lcls, "audioWriteShortBuffer", "([S)V");
	if(_write_buffer != 0) {
		__android_log_print(ANDROID_LOG_INFO,"godot","*******GOT METHOD _write_buffer ok!!");
	}

	while(!quit) {


		int16_t* ptr = (int16_t*)audioBufferPinned;
		int fc = audioBufferFrames;

		if (!s_ad->active || mutex->try_lock()!=OK) {

			for(int i=0;i<fc;i++) {
				ptr[i]=0;
			}

		} else {


			s_ad->audio_server_process(fc/2,audioBuffer32);

			mutex->unlock();

			for(int i=0;i<fc;i++) {

				ptr[i]=audioBuffer32[i]>>16;
			}

		}
		env->ReleaseShortArrayElements((jshortArray)audioBuffer, (jshort *)ptr, JNI_COMMIT);
		env->CallVoidMethod(gob, _write_buffer, (jshortArray)audioBuffer);
	}

}

int AudioDriverAndroid::get_mix_rate() const {

	return mix_rate;
}

AudioDriver::SpeakerMode AudioDriverAndroid::get_speaker_mode() const{

	return SPEAKER_MODE_STEREO;
}

void AudioDriverAndroid::lock(){

	if (mutex)
		mutex->lock();

}

void AudioDriverAndroid::unlock() {

	if (mutex)
		mutex->unlock();
}

void AudioDriverAndroid::finish(){

	JNIEnv *env = ThreadAndroid::get_env();
	env->CallVoidMethod(io, _quit);

	if (audioBuffer) {
		env->DeleteGlobalRef(audioBuffer);
		audioBuffer = NULL;
		audioBufferPinned = NULL;
	}

	active=false;
}

void AudioDriverAndroid::set_pause(bool p_pause) {

	JNIEnv *env = ThreadAndroid::get_env();
	env->CallVoidMethod(io, _pause,p_pause);

}

AudioDriverAndroid::AudioDriverAndroid() {

	s_ad=this;
	active=false;

}

#endif