/*
* Copyright (C) 2009 Google Inc.
*
* 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
#include <stdio.h>
#include <unistd.h>
#define LOG_TAG "SynthProxy"
#include <utils/Log.h>
#include <nativehelper/jni.h>
#include <nativehelper/JNIHelp.h>
#include <android_runtime/AndroidRuntime.h>
#include <tts/TtsEngine.h>
#include <media/AudioTrack.h>
#include <math.h>
#include <dlfcn.h>
#define DEFAULT_TTS_RATE 16000
#define DEFAULT_TTS_FORMAT AudioSystem::PCM_16_BIT
#define DEFAULT_TTS_NB_CHANNELS 1
#define DEFAULT_TTS_BUFFERSIZE 2048
// TODO use the TTS stream type when available
#define DEFAULT_TTS_STREAM_TYPE AudioSystem::MUSIC
// EQ + BOOST parameters
#define FILTER_LOWSHELF_ATTENUATION -18.0f // in dB
#define FILTER_TRANSITION_FREQ 1100.0f // in Hz
#define FILTER_SHELF_SLOPE 1.0f // Q
#define FILTER_GAIN 6.0f // linear gain
// such a huge gain is justified by how much energy in the low frequencies is "wasted" at the output
// of the synthesis. The low shelving filter removes it, leaving room for amplification.
#define USAGEMODE_PLAY_IMMEDIATELY 0
#define USAGEMODE_WRITE_TO_FILE 1
using namespace android;
// ----------------------------------------------------------------------------
struct fields_t {
jfieldID synthProxyFieldJniData;
jclass synthProxyClass;
jmethodID synthProxyMethodPost;
};
// structure to hold the data that is used each time the TTS engine has synthesized more data
struct afterSynthData_t {
jint jniStorage;
int usageMode;
FILE* outputFile;
AudioSystem::stream_type streamType;
};
// ----------------------------------------------------------------------------
// EQ data
double amp;
double w;
double sinw;
double cosw;
double beta;
double a0, a1, a2, b0, b1, b2;
double m_fa, m_fb, m_fc, m_fd, m_fe;
double x0; // x[n]
double x1; // x[n-1]
double x2; // x[n-2]
double out0;// y[n]
double out1;// y[n-1]
double out2;// y[n-2]
void initializeEQ() {
amp = float(pow(10.0, FILTER_LOWSHELF_ATTENUATION / 40.0));
w = 2.0 * M_PI * (FILTER_TRANSITION_FREQ / DEFAULT_TTS_RATE);
sinw = float(sin(w));
cosw = float(cos(w));
beta = float(sqrt(amp)/FILTER_SHELF_SLOPE);
// initialize low-shelf parameters
b0 = amp * ((amp+1.0F) - ((amp-1.0F)*cosw) + (beta*sinw));
b1 = 2.0F * amp * ((amp-1.0F) - ((amp+1.0F)*cosw));
b2 = amp * ((amp+1.0F) - ((amp-1.0F)*cosw) - (beta*sinw));
a0 = (amp+1.0F) + ((amp-1.0F)*cosw) + (beta*sinw);
a1 = 2.0F * ((amp-1.0F) + ((amp+1.0F)*cosw));
a2 = -((amp+1.0F) + ((amp-1.0F)*cosw) - (beta*sinw));
m_fa = FILTER_GAIN * b0/a0;
m_fb = FILTER_GAIN * b1/a0;
m_fc = FILTER_GAIN * b2/a0;
m_fd = a1/a0;
m_fe = a2/a0;
}
void initializeFilter() {
x0 = 0.0f;
x1 = 0.0f;
x2 = 0.0f;
out0 = 0.0f;
out1 = 0.0f;
out2 = 0.0f;
}
void applyFilter(int16_t* buffer, size_t sampleCount) {
for (size_t i=0 ; i<sampleCount ; i++) {
x0 = (double) buffer[i];
out0 = (m_fa*x0) + (m_fb*x1) + (m_fc*x2) + (m_fd*out1) + (m_fe*out2);
x2 = x1;
x1 = x0;
out2 = out1;
out1 = out0;
if (out0 > 32767.0f) {
buffer[i] = 32767;
} else if (out0 < -32768.0f) {
buffer[i] = -32768;
} else {
buffer[i] = (int16_t) out0;
}
}
}
// ----------------------------------------------------------------------------
static fields_t javaTTSFields;
// TODO move to synth member once we have multiple simultaneous engines running
static Mutex engineMutex;
// ----------------------------------------------------------------------------
class SynthProxyJniStorage {
public :
jobject tts_ref;
TtsEngine* mNativeSynthInterface;
void* mEngineLibHandle;
AudioTrack* mAudioOut;
AudioSystem::stream_type mStreamType;
uint32_t mSampleRate;
AudioSystem::audio_format mAudFormat;
int mNbChannels;
int8_t * mBuffer;
size_t mBufferSize;
SynthProxyJniStorage() {
tts_ref = NULL;
mNativeSynthInterface = NULL;
mEngineLibHandle = NULL;
mAudioOut = NULL;
mStreamType = DEFAULT_TTS_STREAM_TYPE;
mSampleRate = DEFAULT_TTS_RATE;
mAudFormat = DEFAULT_TTS_FORMAT;
mNbChannels = DEFAULT_TTS_NB_CHANNELS;
mBufferSize = DEFAULT_TTS_BUFFERSIZE;
mBuffer = new int8_t[mBufferSize];
memset(mBuffer, 0, mBufferSize);
}
~SynthProxyJniStorage() {
//LOGV("entering ~SynthProxyJniStorage()");
killAudio();
if (mNativeSynthInterface) {
mNativeSynthInterface->shutdown();
mNativeSynthInterface = NULL;
}
if (mEngineLibHandle) {
//LOGE("~SynthProxyJniStorage(): before close library");
int res = dlclose(mEngineLibHandle);
LOGE_IF( res != 0, "~SynthProxyJniStorage(): dlclose returned %d", res);
}
delete mBuffer;
}
void killAudio() {
if (mAudioOut) {
mAudioOut->stop();
delete mAudioOut;
mAudioOut = NULL;
}
}
void createAudioOut(AudioSystem::stream_type streamType, uint32_t rate,
AudioSystem::audio_format format, int channel) {
mSampleRate = rate;
mAudFormat = format;
mNbChannels = channel;
mStreamType = streamType;
// retrieve system properties to ensure successful creation of the
// AudioTrack object for playback
int afSampleRate;
if (AudioSystem::getOutputSamplingRate(&afSampleRate, mStreamType) != NO_ERROR) {
afSampleRate = 44100;
}
int afFrameCount;
if (AudioSystem::getOutputFrameCount(&afFrameCount, mStreamType) != NO_ERROR) {
afFrameCount = 2048;
}
uint32_t afLatency;
if (AudioSystem::getOutputLatency(&afLatency, mStreamType) != NO_ERROR) {
afLatency = 500;
}
uint32_t minBufCount = afLatency / ((1000 * afFrameCount)/afSampleRate);
if (minBufCount < 2) minBufCount = 2;
int minFrameCount = (afFrameCount * rate * minBufCount)/afSampleRate;
mAudioOut = new AudioTrack(mStreamType, rate, format, channel,
minFrameCount > 4096 ? minFrameCount : 4096,
0, 0, 0, 0); // not using an AudioTrack callback
if (mAudioOut->initCheck() != NO_ERROR) {
LOGE("createAudioOut(): AudioTrack error");
delete mAudioOut;
mAudioOut = NULL;
} else {
//LOGI("AudioTrack OK");
mAudioOut->setVolume(2.0f, 2.0f);
mAudioOut->start();
LOGV("AudioTrack started");
}
}
};
// ----------------------------------------------------------------------------
void prepAudioTrack(SynthProxyJniStorage* pJniData, AudioSystem::stream_type streamType,
uint32_t rate, AudioSystem::audio_format format, int channel) {
// Don't bother creating a new audiotrack object if the current
// object is already initialized with the same audio parameters.
if ( pJniData->mAudioOut &&
(rate == pJniData->mSampleRate) &&
(format == pJniData->mAudFormat) &&
(channel == pJniData->mNbChannels) &&
(streamType == pJniData->mStreamType) ){
return;
}
if (pJniData->mAudioOut){
pJniData->killAudio();
}
pJniData->createAudioOut(streamType, rate, format, channel);
}
// ----------------------------------------------------------------------------
/*
* Callback from TTS engine.
* Directly speaks using AudioTrack or write to file
*/
static tts_callback_status ttsSynthDoneCB(void *& userdata, uint32_t rate,
AudioSystem::audio_format format, int channel,
int8_t *&wav, size_t &bufferSize, tts_synth_status status) {
//LOGV("ttsSynthDoneCallback: %d bytes", bufferSize);
if (userdata == NULL){
LOGE("userdata == NULL");
return TTS_CALLBACK_HALT;
}
afterSynthData_t* pForAfter = (afterSynthData_t*)userdata;
SynthProxyJniStorage* pJniData = (SynthProxyJniStorage*)(pForAfter->jniStorage);
if (pForAfter->usageMode == USAGEMODE_PLAY_IMMEDIATELY){
//LOGV("Direct speech");
if (wav == NULL) {
delete pForAfter;
LOGV("Null: speech has completed");
}
if (bufferSize > 0) {
prepAudioTrack(pJniData, pForAfter->streamType, rate, format, channel);
if (pJniData->mAudioOut) {
applyFilter((int16_t*)wav, bufferSize/2);
pJniData->mAudioOut->write(wav, bufferSize);
memset(wav, 0, bufferSize);
//LOGV("AudioTrack wrote: %d bytes", bufferSize);
} else {
LOGE("Can't play, null audiotrack");
}
}
} else if (pForAfter->usageMode == USAGEMODE_WRITE_TO_FILE) {
//LOGV("Save to file");
if (wav == NULL) {
delete pForAfter;
LOGV("Null: speech has completed");
return TTS_CALLBACK_HALT;
}
if (bufferSize > 0){
applyFilter((int16_t*)wav, bufferSize/2);
fwrite(wav, 1, bufferSize, pForAfter->outputFile);
memset(wav, 0, bufferSize);
}
}
// Future update:
// For sync points in the speech, call back into the SynthProxy class through the
// javaTTSFields.synthProxyMethodPost methode to notify
// playback has completed if the synthesis is done or if a marker has been reached.
if (status == TTS_SYNTH_DONE) {
// this struct was allocated in the original android_tts_SynthProxy_speak call,
// all processing matching this call is now done.
LOGV("Speech synthesis done.");
if (pForAfter->usageMode == USAGEMODE_PLAY_IMMEDIATELY) {
// only delete for direct playback. When writing to a file, we still have work to do
// in android_tts_SynthProxy_synthesizeToFile. The struct will be deleted there.
delete pForAfter;
pForAfter = NULL;
}
return TTS_CALLBACK_HALT;
}
// we don't update the wav (output) parameter as we'll let the next callback
// write at the same location, we've consumed the data already, but we need
// to update bufferSize to let the TTS engine know how much it can write the
// next time it calls this function.
bufferSize = pJniData->mBufferSize;
return TTS_CALLBACK_CONTINUE;
}
// ----------------------------------------------------------------------------
static void
android_tts_SynthProxy_native_setup(JNIEnv *env, jobject thiz,
jobject weak_this, jstring nativeSoLib)
{
SynthProxyJniStorage* pJniStorage = new SynthProxyJniStorage();
prepAudioTrack(pJniStorage,
DEFAULT_TTS_STREAM_TYPE, DEFAULT_TTS_RATE, DEFAULT_TTS_FORMAT, DEFAULT_TTS_NB_CHANNELS);
const char *nativeSoLibNativeString =
env->GetStringUTFChars(nativeSoLib, 0);
void *engine_lib_handle = dlopen(nativeSoLibNativeString,
RTLD_NOW | RTLD_LOCAL);
if (engine_lib_handle == NULL) {
LOGE("android_tts_SynthProxy_native_setup(): engine_lib_handle == NULL");
// TODO report error so the TTS can't be used
} else {
TtsEngine *(*get_TtsEngine)() =
reinterpret_cast<TtsEngine* (*)()>(dlsym(engine_lib_handle, "getTtsEngine"));
pJniStorage->mNativeSynthInterface = (*get_TtsEngine)();
pJniStorage->mEngineLibHandle = engine_lib_handle;
if (pJniStorage->mNativeSynthInterface) {
Mutex::Autolock l(engineMutex);
pJniStorage->mNativeSynthInterface->init(ttsSynthDoneCB);
}
}
// we use a weak reference so the SynthProxy object can be garbage collected.
pJniStorage->tts_ref = env->NewGlobalRef(weak_this);
// save the JNI resources so we can use them (and free them) later
env->SetIntField(thiz, javaTTSFields.synthProxyFieldJniData,
(int)pJniStorage);
initializeEQ();
env->ReleaseStringUTFChars(nativeSoLib, nativeSoLibNativeString);
}
static void
android_tts_SynthProxy_native_finalize(JNIEnv *env, jobject thiz, jint jniData)
{
//LOGV("entering android_tts_SynthProxy_finalize()");
if (jniData == 0) {
//LOGE("android_tts_SynthProxy_native_finalize(): invalid JNI data");
return;
}
Mutex::Autolock l(engineMutex);
SynthProxyJniStorage* pSynthData = (SynthProxyJniStorage*)jniData;
env->DeleteGlobalRef(pSynthData->tts_ref);
delete pSynthData;
env->SetIntField(thiz, javaTTSFields.synthProxyFieldJniData, 0);
}
static void
android_tts_SynthProxy_shutdown(JNIEnv *env, jobject thiz, jint jniData)
{
//LOGV("entering android_tts_SynthProxy_shutdown()");
// do everything a call to finalize would
android_tts_SynthProxy_native_finalize(env, thiz, jniData);
}
static int
android_tts_SynthProxy_isLanguageAvailable(JNIEnv *env, jobject thiz, jint jniData,
jstring language, jstring country, jstring variant)
{
int result = TTS_LANG_NOT_SUPPORTED;
if (jniData == 0) {
LOGE("android_tts_SynthProxy_isLanguageAvailable(): invalid JNI data");
return result;
}
SynthProxyJniStorage* pSynthData = (SynthProxyJniStorage*)jniData;
const char *langNativeString = env->GetStringUTFChars(language, 0);
const char *countryNativeString = env->GetStringUTFChars(country, 0);
const char *variantNativeString = env->GetStringUTFChars(variant, 0);
if (pSynthData->mNativeSynthInterface) {
result = pSynthData->mNativeSynthInterface->isLanguageAvailable(langNativeString,
countryNativeString, variantNativeString);
}
env->ReleaseStringUTFChars(language, langNativeString);
env->ReleaseStringUTFChars(country, countryNativeString);
env->ReleaseStringUTFChars(variant, variantNativeString);
return result;
}
static int
android_tts_SynthProxy_setLanguage(JNIEnv *env, jobject thiz, jint jniData,
jstring language, jstring country, jstring variant)
{
int result = TTS_LANG_NOT_SUPPORTED;
if (jniData == 0) {
LOGE("android_tts_SynthProxy_setLanguage(): invalid JNI data");
return result;
}
Mutex::Autolock l(engineMutex);
SynthProxyJniStorage* pSynthData = (SynthProxyJniStorage*)jniData;
const char *langNativeString = env->GetStringUTFChars(language, 0);
const char *countryNativeString = env->GetStringUTFChars(country, 0);
const char *variantNativeString = env->GetStringUTFChars(variant, 0);
if (pSynthData->mNativeSynthInterface) {
result = pSynthData->mNativeSynthInterface->setLanguage(langNativeString,
countryNativeString, variantNativeString);
}
env->ReleaseStringUTFChars(language, langNativeString);
env->ReleaseStringUTFChars(country, countryNativeString);
env->ReleaseStringUTFChars(variant, variantNativeString);
return result;
}
static int
android_tts_SynthProxy_loadLanguage(JNIEnv *env, jobject thiz, jint jniData,
jstring language, jstring country, jstring variant)
{
int result = TTS_LANG_NOT_SUPPORTED;
if (jniData == 0) {
LOGE("android_tts_SynthProxy_loadLanguage(): invalid JNI data");
return result;
}
SynthProxyJniStorage* pSynthData = (SynthProxyJniStorage*)jniData;
const char *langNativeString = env->GetStringUTFChars(language, 0);
const char *countryNativeString = env->GetStringUTFChars(country, 0);
const char *variantNativeString = env->GetStringUTFChars(variant, 0);
if (pSynthData->mNativeSynthInterface) {
result = pSynthData->mNativeSynthInterface->loadLanguage(langNativeString,
countryNativeString, variantNativeString);
}
env->ReleaseStringUTFChars(language, langNativeString);
env->ReleaseStringUTFChars(country, countryNativeString);
env->ReleaseStringUTFChars(variant, variantNativeString);
return result;
}
static int
android_tts_SynthProxy_setSpeechRate(JNIEnv *env, jobject thiz, jint jniData,
jint speechRate)
{
int result = TTS_FAILURE;
if (jniData == 0) {
LOGE("android_tts_SynthProxy_setSpeechRate(): invalid JNI data");
return result;
}
int bufSize = 10;
char buffer [bufSize];
sprintf(buffer, "%d", speechRate);
Mutex::Autolock l(engineMutex);
SynthProxyJniStorage* pSynthData = (SynthProxyJniStorage*)jniData;
LOGI("setting speech rate to %d", speechRate);
if (pSynthData->mNativeSynthInterface) {
result = pSynthData->mNativeSynthInterface->setProperty("rate", buffer, bufSize);
}
return result;
}
static int
android_tts_SynthProxy_setPitch(JNIEnv *env, jobject thiz, jint jniData,
jint pitch)
{
int result = TTS_FAILURE;
if (jniData == 0) {
LOGE("android_tts_SynthProxy_setPitch(): invalid JNI data");
return result;
}
Mutex::Autolock l(engineMutex);
int bufSize = 10;
char buffer [bufSize];
sprintf(buffer, "%d", pitch);
SynthProxyJniStorage* pSynthData = (SynthProxyJniStorage*)jniData;
LOGI("setting pitch to %d", pitch);
if (pSynthData->mNativeSynthInterface) {
result = pSynthData->mNativeSynthInterface->setProperty("pitch", buffer, bufSize);
}
return result;
}
static int
android_tts_SynthProxy_synthesizeToFile(JNIEnv *env, jobject thiz, jint jniData,
jstring textJavaString, jstring filenameJavaString)
{
int result = TTS_FAILURE;
if (jniData == 0) {
LOGE("android_tts_SynthProxy_synthesizeToFile(): invalid JNI data");
return result;
}
SynthProxyJniStorage* pSynthData = (SynthProxyJniStorage*)jniData;
if (!pSynthData->mNativeSynthInterface) {
LOGE("android_tts_SynthProxy_synthesizeToFile(): invalid engine handle");
return result;
}
initializeFilter();
Mutex::Autolock l(engineMutex);
// Retrieve audio parameters before writing the file header
AudioSystem::audio_format encoding = DEFAULT_TTS_FORMAT;
uint32_t rate = DEFAULT_TTS_RATE;
int channels = DEFAULT_TTS_NB_CHANNELS;
pSynthData->mNativeSynthInterface->setAudioFormat(encoding, rate, channels);
if ((encoding != AudioSystem::PCM_16_BIT) && (encoding != AudioSystem::PCM_8_BIT)) {
LOGE("android_tts_SynthProxy_synthesizeToFile(): engine uses invalid format");
return result;
}
const char *filenameNativeString =
env->GetStringUTFChars(filenameJavaString, 0);
const char *textNativeString = env->GetStringUTFChars(textJavaString, 0);
afterSynthData_t* pForAfter = new (afterSynthData_t);
pForAfter->jniStorage = jniData;
pForAfter->usageMode = USAGEMODE_WRITE_TO_FILE;
pForAfter->outputFile = fopen(filenameNativeString, "wb");
if (pForAfter->outputFile == NULL) {
LOGE("android_tts_SynthProxy_synthesizeToFile(): error creating output file");
delete pForAfter;
return result;
}
// Write 44 blank bytes for WAV header, then come back and fill them in
// after we've written the audio data
char header[44];
fwrite(header, 1, 44, pForAfter->outputFile);
unsigned int unique_identifier;
memset(pSynthData->mBuffer, 0, pSynthData->mBufferSize);
result = pSynthData->mNativeSynthInterface->synthesizeText(textNativeString,
pSynthData->mBuffer, pSynthData->mBufferSize, (void *)pForAfter);
long filelen = ftell(pForAfter->outputFile);
int samples = (((int)filelen) - 44) / 2;
header[0] = 'R';
header[1] = 'I';
header[2] = 'F';
header[3] = 'F';
((uint32_t *)(&header[4]))[0] = filelen - 8;
header[8] = 'W';
header[9] = 'A';
header[10] = 'V';
header[11] = 'E';
header[12] = 'f';
header[13] = 'm';
header[14] = 't';
header[15] = ' ';
((uint32_t *)(&header[16]))[0] = 16; // size of fmt
int sampleSizeInByte = (encoding == AudioSystem::PCM_16_BIT ? 2 : 1);
((unsigned short *)(&header[20]))[0] = 1; // format
((unsigned short *)(&header[22]))[0] = channels; // channels
((uint32_t *)(&header[24]))[0] = rate; // samplerate
((uint32_t *)(&header[28]))[0] = rate * sampleSizeInByte * channels;// byterate
((unsigned short *)(&header[32]))[0] = sampleSizeInByte * channels; // block align
((unsigned short *)(&header[34]))[0] = sampleSizeInByte * 8; // bits per sample
header[36] = 'd';
header[37] = 'a';
header[38] = 't';
header[39] = 'a';
((uint32_t *)(&header[40]))[0] = samples * 2; // size of data
// Skip back to the beginning and rewrite the header
fseek(pForAfter->outputFile, 0, SEEK_SET);
fwrite(header, 1, 44, pForAfter->outputFile);
fflush(pForAfter->outputFile);
fclose(pForAfter->outputFile);
delete pForAfter;
pForAfter = NULL;
env->ReleaseStringUTFChars(textJavaString, textNativeString);
env->ReleaseStringUTFChars(filenameJavaString, filenameNativeString);
return result;
}
static int
android_tts_SynthProxy_speak(JNIEnv *env, jobject thiz, jint jniData,
jstring textJavaString, jint javaStreamType)
{
int result = TTS_FAILURE;
if (jniData == 0) {
LOGE("android_tts_SynthProxy_speak(): invalid JNI data");
return result;
}
initializeFilter();
Mutex::Autolock l(engineMutex);
SynthProxyJniStorage* pSynthData = (SynthProxyJniStorage*)jniData;
if (pSynthData->mAudioOut) {
pSynthData->mAudioOut->start();
}
afterSynthData_t* pForAfter = new (afterSynthData_t);
pForAfter->jniStorage = jniData;
pForAfter->usageMode = USAGEMODE_PLAY_IMMEDIATELY;
pForAfter->streamType = (AudioSystem::stream_type) javaStreamType;
if (pSynthData->mNativeSynthInterface) {
const char *textNativeString = env->GetStringUTFChars(textJavaString, 0);
memset(pSynthData->mBuffer, 0, pSynthData->mBufferSize);
result = pSynthData->mNativeSynthInterface->synthesizeText(textNativeString,
pSynthData->mBuffer, pSynthData->mBufferSize, (void *)pForAfter);
env->ReleaseStringUTFChars(textJavaString, textNativeString);
}
return result;
}
static int
android_tts_SynthProxy_stop(JNIEnv *env, jobject thiz, jint jniData)
{
int result = TTS_FAILURE;
if (jniData == 0) {
LOGE("android_tts_SynthProxy_stop(): invalid JNI data");
return result;
}
SynthProxyJniStorage* pSynthData = (SynthProxyJniStorage*)jniData;
if (pSynthData->mAudioOut) {
pSynthData->mAudioOut->stop();
}
if (pSynthData->mNativeSynthInterface) {
result = pSynthData->mNativeSynthInterface->stop();
}
return result;
}
static jobjectArray
android_tts_SynthProxy_getLanguage(JNIEnv *env, jobject thiz, jint jniData)
{
if (jniData == 0) {
LOGE("android_tts_SynthProxy_getLanguage(): invalid JNI data");
return NULL;
}
SynthProxyJniStorage* pSynthData = (SynthProxyJniStorage*)jniData;
if (pSynthData->mNativeSynthInterface) {
size_t bufSize = 100;
char lang[bufSize];
char country[bufSize];
char variant[bufSize];
memset(lang, 0, bufSize);
memset(country, 0, bufSize);
memset(variant, 0, bufSize);
jobjectArray retLocale = (jobjectArray)env->NewObjectArray(3,
env->FindClass("java/lang/String"), env->NewStringUTF(""));
pSynthData->mNativeSynthInterface->getLanguage(lang, country, variant);
env->SetObjectArrayElement(retLocale, 0, env->NewStringUTF(lang));
env->SetObjectArrayElement(retLocale, 1, env->NewStringUTF(country));
env->SetObjectArrayElement(retLocale, 2, env->NewStringUTF(variant));
return retLocale;
} else {
return NULL;
}
}
JNIEXPORT int JNICALL
android_tts_SynthProxy_getRate(JNIEnv *env, jobject thiz, jint jniData)
{
if (jniData == 0) {
LOGE("android_tts_SynthProxy_getRate(): invalid JNI data");
return 0;
}
SynthProxyJniStorage* pSynthData = (SynthProxyJniStorage*)jniData;
size_t bufSize = 100;
char buf[bufSize];
memset(buf, 0, bufSize);
// TODO check return codes
if (pSynthData->mNativeSynthInterface) {
pSynthData->mNativeSynthInterface->getProperty("rate", buf, &bufSize);
}
return atoi(buf);
}
// Dalvik VM type signatures
static JNINativeMethod gMethods[] = {
{ "native_stop",
"(I)I",
(void*)android_tts_SynthProxy_stop
},
{ "native_speak",
"(ILjava/lang/String;I)I",
(void*)android_tts_SynthProxy_speak
},
{ "native_synthesizeToFile",
"(ILjava/lang/String;Ljava/lang/String;)I",
(void*)android_tts_SynthProxy_synthesizeToFile
},
{ "native_isLanguageAvailable",
"(ILjava/lang/String;Ljava/lang/String;Ljava/lang/String;)I",
(void*)android_tts_SynthProxy_isLanguageAvailable
},
{ "native_setLanguage",
"(ILjava/lang/String;Ljava/lang/String;Ljava/lang/String;)I",
(void*)android_tts_SynthProxy_setLanguage
},
{ "native_loadLanguage",
"(ILjava/lang/String;Ljava/lang/String;Ljava/lang/String;)I",
(void*)android_tts_SynthProxy_loadLanguage
},
{ "native_setSpeechRate",
"(II)I",
(void*)android_tts_SynthProxy_setSpeechRate
},
{ "native_setPitch",
"(II)I",
(void*)android_tts_SynthProxy_setPitch
},
{ "native_getLanguage",
"(I)[Ljava/lang/String;",
(void*)android_tts_SynthProxy_getLanguage
},
{ "native_getRate",
"(I)I",
(void*)android_tts_SynthProxy_getRate
},
{ "native_shutdown",
"(I)V",
(void*)android_tts_SynthProxy_shutdown
},
{ "native_setup",
"(Ljava/lang/Object;Ljava/lang/String;)V",
(void*)android_tts_SynthProxy_native_setup
},
{ "native_finalize",
"(I)V",
(void*)android_tts_SynthProxy_native_finalize
}
};
#define SP_JNIDATA_FIELD_NAME "mJniData"
#define SP_POSTSPEECHSYNTHESIZED_METHOD_NAME "postNativeSpeechSynthesizedInJava"
static const char* const kClassPathName = "android/tts/SynthProxy";
jint JNI_OnLoad(JavaVM* vm, void* reserved)
{
JNIEnv* env = NULL;
jint result = -1;
jclass clazz;
if (vm->GetEnv((void**) &env, JNI_VERSION_1_4) != JNI_OK) {
LOGE("ERROR: GetEnv failed\n");
goto bail;
}
assert(env != NULL);
clazz = env->FindClass(kClassPathName);
if (clazz == NULL) {
LOGE("Can't find %s", kClassPathName);
goto bail;
}
javaTTSFields.synthProxyClass = clazz;
javaTTSFields.synthProxyFieldJniData = NULL;
javaTTSFields.synthProxyMethodPost = NULL;
javaTTSFields.synthProxyFieldJniData = env->GetFieldID(clazz,
SP_JNIDATA_FIELD_NAME, "I");
if (javaTTSFields.synthProxyFieldJniData == NULL) {
LOGE("Can't find %s.%s field", kClassPathName, SP_JNIDATA_FIELD_NAME);
goto bail;
}
javaTTSFields.synthProxyMethodPost = env->GetStaticMethodID(clazz,
SP_POSTSPEECHSYNTHESIZED_METHOD_NAME, "(Ljava/lang/Object;II)V");
if (javaTTSFields.synthProxyMethodPost == NULL) {
LOGE("Can't find %s.%s method", kClassPathName, SP_POSTSPEECHSYNTHESIZED_METHOD_NAME);
goto bail;
}
if (jniRegisterNativeMethods(
env, kClassPathName, gMethods, NELEM(gMethods)) < 0)
goto bail;
/* success -- return valid version number */
result = JNI_VERSION_1_4;
bail:
return result;
}