Implement SpeechSynthesis.getBufferSizeInMillis in Java.

android/jni/jni/eSpeakService.cpp

@@ -109,19 +109,15 @@ enum synthesis_result {
   SYNTH_ABORT = 1
 };
 
-const int DEFAULT_BUFFER_SIZE = 1000;
-
 struct native_data_t {
   JNIEnv *env;
   jobject object;
   int sampleRate;
-  int bufferSizeInMillis;
 
   native_data_t() {
     env = NULL;
     object = NULL;
     sampleRate = 0;
-    bufferSizeInMillis = DEFAULT_BUFFER_SIZE;
   }
 };
 
@@ -178,7 +174,7 @@ JNICALL Java_com_reecedunn_espeak_SpeechSynthesis_nativeClassInit(
 
 JNIEXPORT jboolean
 JNICALL Java_com_reecedunn_espeak_SpeechSynthesis_nativeCreate(
-    JNIEnv *env, jobject object, jstring path) {
+    JNIEnv *env, jobject object, jstring path, jint bufferSizeInMillis) {
   if (DEBUG) LOGV("%s [env=%p, object=%p]", __FUNCTION__, env, object);
   native_data_t *nat = new native_data_t;
 
@@ -193,7 +189,7 @@ JNICALL Java_com_reecedunn_espeak_SpeechSynthesis_nativeCreate(
 
   nat->object = env->NewWeakGlobalRef(object);
   if (DEBUG) LOGV("Initializing with path %s", c_path);
-  nat->sampleRate = espeak_Initialize(AUDIO_OUTPUT_SYNCHRONOUS, nat->bufferSizeInMillis, c_path, 0);
+  nat->sampleRate = espeak_Initialize(AUDIO_OUTPUT_SYNCHRONOUS, bufferSizeInMillis, c_path, 0);
 
   if (c_path) env->ReleaseStringUTFChars(path, c_path);
 
@@ -229,14 +225,6 @@ JNICALL Java_com_reecedunn_espeak_SpeechSynthesis_nativeGetSampleRate(
   return (jint)(nat ? nat->sampleRate : 0);
 }
 
-JNIEXPORT jint
-JNICALL Java_com_reecedunn_espeak_SpeechSynthesis_nativeGetBufferSizeInMillis(
-    JNIEnv *env, jobject object) {
-  if (DEBUG) LOGV("%s", __FUNCTION__);
-  const native_data_t *nat = getNativeData(env, object);
-  return (jint) nat->bufferSizeInMillis;
-}
-
 JNIEXPORT jobjectArray
 JNICALL Java_com_reecedunn_espeak_SpeechSynthesis_nativeGetAvailableVoices(
     JNIEnv *env, jobject object) {

android/src/com/reecedunn/espeak/SpeechSynthesis.java

@@ -51,6 +51,7 @@ public class SpeechSynthesis {
 
     public static final int CHANNEL_COUNT_MONO = 1;
     public static final int FORMAT_PCM_S16 = 2;
+    public static final int BUFFER_SIZE_IN_MILLIS = 1000;
 
     static {
         System.loadLibrary("ttsespeak");
@@ -107,7 +108,7 @@ public class SpeechSynthesis {
     }
 
     public int getBufferSizeInBytes() {
-        final int bufferSizeInMillis = nativeGetBufferSizeInMillis();
+        final int bufferSizeInMillis = BUFFER_SIZE_IN_MILLIS;
         final int sampleRate = nativeGetSampleRate();
         return (bufferSizeInMillis * sampleRate) / 1000;
     }
@@ -310,7 +311,7 @@ public class SpeechSynthesis {
             return;
         }
 
-        if (!nativeCreate(mDatapath)) {
+        if (!nativeCreate(mDatapath, BUFFER_SIZE_IN_MILLIS)) {
             Log.e(TAG, "Failed to initialize speech synthesis library");
             return;
         }
@@ -336,7 +337,7 @@ public class SpeechSynthesis {
 
     private static native final boolean nativeClassInit();
 
-    private native final boolean nativeCreate(String path);
+    private native final boolean nativeCreate(String path, int bufferSizeInMillis);
 
     private native final boolean nativeDestroy();
 
@@ -344,8 +345,6 @@ public class SpeechSynthesis {
 
     private native final int nativeGetSampleRate();
 
-    private native final int nativeGetBufferSizeInMillis();
-
     private native final String[] nativeGetAvailableVoices();
 
     private native final boolean nativeSetVoiceByName(String name);