TtsService.java: rework the logic to use the new Parameter API.

android/jni/jni/eSpeakService.cpp

@@ -288,44 +288,6 @@ JNICALL Java_com_reecedunn_espeak_SpeechSynthesis_nativeSetVoiceByProperties(
   return JNI_FALSE;
 }
 
-JNIEXPORT jboolean
-JNICALL Java_com_reecedunn_espeak_SpeechSynthesis_nativeSetRate(
-    JNIEnv *env, jobject object, jint rate) {
-  const int wpm = ((float)rate / 100) * espeak_GetParameter(espeakRATE, 0);
-  if (DEBUG) LOGV("%s(rate=%d, wpm=%d)", __FUNCTION__, rate, wpm);
-
-  const espeak_ERROR result = espeak_SetParameter(espeakRATE, wpm, 0);
-
-  switch (result) {
-    case EE_OK:             return JNI_TRUE;
-    case EE_INTERNAL_ERROR: LOGE("espeak_SetParameter: internal error."); break;
-    case EE_BUFFER_FULL:    LOGE("espeak_SetParameter: buffer full."); break;
-    case EE_NOT_FOUND:      LOGE("espeak_SetParameter: not found."); break;
-  }
-
-  return JNI_FALSE;
-}
-
-JNIEXPORT jboolean
-JNICALL Java_com_reecedunn_espeak_SpeechSynthesis_nativeSetPitch(
-    JNIEnv *env, jobject object, jint pitch) {
-  // The values of pitch from android range from 50 - 200, with 100 being normal.
-  // The values espeak supports are from 0 - 100, with 50 being normal.
-  // Therefore, halve the value to get the value that espeak supports:
-  pitch = pitch / 2;
-  if (DEBUG) LOGV("%s(pitch=%d)", __FUNCTION__, pitch);
-  const espeak_ERROR result = espeak_SetParameter(espeakPITCH, (int) pitch, 0);
-
-  switch (result) {
-    case EE_OK:             return JNI_TRUE;
-    case EE_INTERNAL_ERROR: LOGE("espeak_SetParameter: internal error."); break;
-    case EE_BUFFER_FULL:    LOGE("espeak_SetParameter: buffer full."); break;
-    case EE_NOT_FOUND:      LOGE("espeak_SetParameter: not found."); break;
-  }
-
-  return JNI_FALSE;
-}
-
 JNIEXPORT jboolean
 JNICALL Java_com_reecedunn_espeak_SpeechSynthesis_nativeSetParameter(
     JNIEnv *env, jobject object, jint parameter, jint value) {

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

@@ -183,14 +183,6 @@ public class SpeechSynthesis {
         }
     }
 
-    public void setRate(int rate) {
-        nativeSetRate(rate);
-    }
-
-    public void setPitch(int pitch) {
-        nativeSetPitch(pitch);
-    }
-
     /** Don't announce any punctuation characters. */
     public static int PUNCT_NONE = 0;
 
@@ -326,10 +318,6 @@ public class SpeechSynthesis {
 
     private native final boolean nativeSetVoiceByProperties(String language, int gender, int age);
 
-    private native final boolean nativeSetRate(int rate);
-
-    private native final boolean nativeSetPitch(int pitch);
-
     private native final boolean nativeSetParameter(int parameter, int value);
 
     private native final int nativeGetParameter(int parameter, int current);

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

@@ -196,9 +196,9 @@ public class TtsService extends TextToSpeechService {
         if (text == null)
             return;
 
-        final int gender = getDefaultGender();
-        final int rate = scaleRate(request.getSpeechRate());
-        final int pitch = scalePitch(request.getPitch());
+        final int gender = getPreferenceValue("default_gender", 0);
+        final int rate = (getPreferenceValue("default_rate", 100) / 100) * mEngine.Rate.getDefaultValue();
+        final int pitch = getPreferenceValue("default_pitch", 100) / 2;
         final Bundle params = request.getParams();
 
         if (DEBUG) {
@@ -222,50 +222,18 @@ public class TtsService extends TextToSpeechService {
                 mEngine.getChannelCount());
 
         mEngine.setVoice(mMatchingVoice, null, gender, SpeechSynthesis.AGE_ANY);
-        mEngine.setRate(rate);
-        mEngine.setPitch(pitch);
+        mEngine.Rate.setValue(rate, request.getSpeechRate());
+        mEngine.Pitch.setValue(pitch, request.getPitch());
         mEngine.synthesize(text, text.startsWith("<speak"));
     }
 
-    /**
-     * Scales the pitch by the user-specified value.
-     *
-     * @param pitch A pitch value.
-     * @return A scaled pitch value.
-     */
-    private int scalePitch(int pitch) {
-        final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
-        final String defaultPitchString = prefs.getString("default_pitch", "100");
-        final int defaultPitch = Integer.parseInt(defaultPitchString);
-
-        return (pitch * defaultPitch / 100);
-    }
-
-    /**
-     * Returns user-specified gender.
-     *
-     * @return A gender value.
-     */
-    private int getDefaultGender() {
+    private int getPreferenceValue(String preference, int defaultValue) {
         final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
-        final String defaultGenderString = prefs.getString("default_gender", "0");
-        final int defaultGender = Integer.parseInt(defaultGenderString);
-
-        return defaultGender;
-    }
-
-    /**
-     * Scales the rate by the user-specified value.
-     *
-     * @param rate A rate value.
-     * @return A scaled rate value.
-     */
-    private int scaleRate(int rate) {
-        final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
-        final String defaultRateString = prefs.getString("default_rate", "100");
-        final int defaultRate = Integer.parseInt(defaultRateString);
-
-        return (rate * defaultRate / 100);
+        final String prefString = prefs.getString(preference, null);
+        if (prefString == null) {
+            return defaultValue;
+        }
+        return Integer.parseInt(prefString);
     }
 
     /**