Merge changes I8462f040,Ie471f40f

* changes:
  MediaCodec: Allow getting the codec info directly
  MediaCodec: Allow getting the chosen component name

api/current.txt

@@ -11199,7 +11199,9 @@ package android.media {
     method public final int dequeueInputBuffer(long);
     method public final int dequeueOutputBuffer(android.media.MediaCodec.BufferInfo, long);
     method public final void flush();
+    method public android.media.MediaCodecInfo getCodecInfo();
     method public java.nio.ByteBuffer[] getInputBuffers();
+    method public final java.lang.String getName();
     method public java.nio.ByteBuffer[] getOutputBuffers();
     method public final android.media.MediaFormat getOutputFormat();
     method public final void queueInputBuffer(int, int, int, long, int) throws android.media.MediaCodec.CryptoException;

media/java/android/media/MediaCodec.java

@@ -16,6 +16,8 @@
 
 package android.media;
 
+import android.media.MediaCodecInfo;
+import android.media.MediaCodecList;
 import android.media.MediaCrypto;
 import android.media.MediaFormat;
 import android.view.Surface;
@@ -498,6 +500,22 @@ final public class MediaCodec {
      */
     public native final void setVideoScalingMode(int mode);
 
+    /**
+     * Get the component name. If the codec was created by createDecoderByType
+     * or createEncoderByType, what component is chosen is not known beforehand.
+     */
+    public native final String getName();
+
+    /**
+     * Get the codec info. If the codec was created by createDecoderByType
+     * or createEncoderByType, what component is chosen is not known beforehand,
+     * and thus the caller does not have the MediaCodecInfo.
+     */
+    public MediaCodecInfo getCodecInfo() {
+        return MediaCodecList.getCodecInfoAt(
+                   MediaCodecList.findCodecByName(getName()));
+    }
+
     private native final ByteBuffer[] getBuffers(boolean input);
 
     private static native final void native_init();

media/java/android/media/MediaCodecList.java

@@ -46,6 +46,8 @@ final public class MediaCodecList {
     /* package private */ static native final MediaCodecInfo.CodecCapabilities
         getCodecCapabilities(int index, String type);
 
+    /* package private */ static native final int findCodecByName(String codec);
+
     private static native final void native_init();
 
     private MediaCodecList() {}

media/jni/android_media_MediaCodec.cpp

@@ -264,6 +264,20 @@ status_t JMediaCodec::getBuffers(
     return OK;
 }
 
+status_t JMediaCodec::getName(JNIEnv *env, jstring *nameStr) const {
+    AString name;
+
+    status_t err = mCodec->getName(&name);
+
+    if (err != OK) {
+        return err;
+    }
+
+    *nameStr = env->NewStringUTF(name.c_str());
+
+    return OK;
+}
+
 void JMediaCodec::setVideoScalingMode(int mode) {
     if (mSurfaceTextureClient != NULL) {
         native_window_set_scaling_mode(mSurfaceTextureClient.get(), mode);
@@ -706,6 +720,29 @@ static jobjectArray android_media_MediaCodec_getBuffers(
     return NULL;
 }
 
+static jobject android_media_MediaCodec_getName(
+        JNIEnv *env, jobject thiz) {
+    ALOGV("android_media_MediaCodec_getName");
+
+    sp<JMediaCodec> codec = getMediaCodec(env, thiz);
+
+    if (codec == NULL) {
+        jniThrowException(env, "java/lang/IllegalStateException", NULL);
+        return NULL;
+    }
+
+    jstring name;
+    status_t err = codec->getName(env, &name);
+
+    if (err == OK) {
+        return name;
+    }
+
+    throwExceptionAsNecessary(env, err);
+
+    return NULL;
+}
+
 static void android_media_MediaCodec_setVideoScalingMode(
         JNIEnv *env, jobject thiz, jint mode) {
     sp<JMediaCodec> codec = getMediaCodec(env, thiz);
@@ -826,6 +863,9 @@ static JNINativeMethod gMethods[] = {
     { "getBuffers", "(Z)[Ljava/nio/ByteBuffer;",
       (void *)android_media_MediaCodec_getBuffers },
 
+    { "getName", "()Ljava/lang/String;",
+      (void *)android_media_MediaCodec_getName },
+
     { "setVideoScalingMode", "(I)V",
       (void *)android_media_MediaCodec_setVideoScalingMode },
 

media/jni/android_media_MediaCodec.h

@@ -81,6 +81,8 @@ struct JMediaCodec : public RefBase {
     status_t getBuffers(
             JNIEnv *env, bool input, jobjectArray *bufArray) const;
 
+    status_t getName(JNIEnv *env, jstring *name) const;
+
     void setVideoScalingMode(int mode);
 
 protected:

media/jni/android_media_MediaCodecList.cpp

@@ -44,6 +44,25 @@ static jstring android_media_MediaCodecList_getCodecName(
     return env->NewStringUTF(name);
 }
 
+static jint android_media_MediaCodecList_findCodecByName(
+        JNIEnv *env, jobject thiz, jstring name) {
+    if (name == NULL) {
+        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        return -ENOENT;
+    }
+
+    const char *nameStr = env->GetStringUTFChars(name, NULL);
+
+    if (nameStr == NULL) {
+        // Out of memory exception already pending.
+        return -ENOENT;
+    }
+
+    jint ret = MediaCodecList::getInstance()->findCodecByName(nameStr);
+    env->ReleaseStringUTFChars(name, nameStr);
+    return ret;
+}
+
 static jboolean android_media_MediaCodecList_isEncoder(
         JNIEnv *env, jobject thiz, jint index) {
     return MediaCodecList::getInstance()->isEncoder(index);
@@ -180,6 +199,9 @@ static JNINativeMethod gMethods[] = {
       "(ILjava/lang/String;)Landroid/media/MediaCodecInfo$CodecCapabilities;",
       (void *)android_media_MediaCodecList_getCodecCapabilities },
 
+    { "findCodecByName", "(Ljava/lang/String;)I",
+      (void *)android_media_MediaCodecList_findCodecByName },
+
     { "native_init", "()V", (void *)android_media_MediaCodecList_native_init },
 };