Merge "Revert "Revert "AudioTrack: Add getUnderrunCount()"""
diff --git a/api/current.txt b/api/current.txt
index f92518f..6e03e0f 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -19365,6 +19365,7 @@
     field public static final deprecated int NUM_STREAMS = 5; // 0x5
     field public static final java.lang.String PROPERTY_OUTPUT_FRAMES_PER_BUFFER = "android.media.property.OUTPUT_FRAMES_PER_BUFFER";
     field public static final java.lang.String PROPERTY_OUTPUT_SAMPLE_RATE = "android.media.property.OUTPUT_SAMPLE_RATE";
+    field public static final java.lang.String PROPERTY_SUPPORT_AUDIO_SOURCE_UNPROCESSED = "android.media.property.SUPPORT_AUDIO_SOURCE_UNPROCESSED";
     field public static final java.lang.String PROPERTY_SUPPORT_MIC_NEAR_ULTRASOUND = "android.media.property.SUPPORT_MIC_NEAR_ULTRASOUND";
     field public static final java.lang.String PROPERTY_SUPPORT_SPEAKER_NEAR_ULTRASOUND = "android.media.property.SUPPORT_SPEAKER_NEAR_ULTRASOUND";
     field public static final java.lang.String RINGER_MODE_CHANGED_ACTION = "android.media.RINGER_MODE_CHANGED";
@@ -20725,6 +20726,7 @@
     field public static final int DEFAULT = 0; // 0x0
     field public static final int MIC = 1; // 0x1
     field public static final int REMOTE_SUBMIX = 8; // 0x8
+    field public static final int UNPROCESSED = 9; // 0x9
     field public static final int VOICE_CALL = 4; // 0x4
     field public static final int VOICE_COMMUNICATION = 7; // 0x7
     field public static final int VOICE_DOWNLINK = 3; // 0x3
diff --git a/api/system-current.txt b/api/system-current.txt
index 6bba573..12b9b32 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -20670,6 +20670,7 @@
     field public static final deprecated int NUM_STREAMS = 5; // 0x5
     field public static final java.lang.String PROPERTY_OUTPUT_FRAMES_PER_BUFFER = "android.media.property.OUTPUT_FRAMES_PER_BUFFER";
     field public static final java.lang.String PROPERTY_OUTPUT_SAMPLE_RATE = "android.media.property.OUTPUT_SAMPLE_RATE";
+    field public static final java.lang.String PROPERTY_SUPPORT_AUDIO_SOURCE_UNPROCESSED = "android.media.property.SUPPORT_AUDIO_SOURCE_UNPROCESSED";
     field public static final java.lang.String PROPERTY_SUPPORT_MIC_NEAR_ULTRASOUND = "android.media.property.SUPPORT_MIC_NEAR_ULTRASOUND";
     field public static final java.lang.String PROPERTY_SUPPORT_SPEAKER_NEAR_ULTRASOUND = "android.media.property.SUPPORT_SPEAKER_NEAR_ULTRASOUND";
     field public static final java.lang.String RINGER_MODE_CHANGED_ACTION = "android.media.RINGER_MODE_CHANGED";
@@ -22035,6 +22036,7 @@
     field public static final int MIC = 1; // 0x1
     field public static final int RADIO_TUNER = 1998; // 0x7ce
     field public static final int REMOTE_SUBMIX = 8; // 0x8
+    field public static final int UNPROCESSED = 9; // 0x9
     field public static final int VOICE_CALL = 4; // 0x4
     field public static final int VOICE_COMMUNICATION = 7; // 0x7
     field public static final int VOICE_DOWNLINK = 3; // 0x3
diff --git a/api/test-current.txt b/api/test-current.txt
index 66c856f..5e07343 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -19373,6 +19373,7 @@
     field public static final deprecated int NUM_STREAMS = 5; // 0x5
     field public static final java.lang.String PROPERTY_OUTPUT_FRAMES_PER_BUFFER = "android.media.property.OUTPUT_FRAMES_PER_BUFFER";
     field public static final java.lang.String PROPERTY_OUTPUT_SAMPLE_RATE = "android.media.property.OUTPUT_SAMPLE_RATE";
+    field public static final java.lang.String PROPERTY_SUPPORT_AUDIO_SOURCE_UNPROCESSED = "android.media.property.SUPPORT_AUDIO_SOURCE_UNPROCESSED";
     field public static final java.lang.String PROPERTY_SUPPORT_MIC_NEAR_ULTRASOUND = "android.media.property.SUPPORT_MIC_NEAR_ULTRASOUND";
     field public static final java.lang.String PROPERTY_SUPPORT_SPEAKER_NEAR_ULTRASOUND = "android.media.property.SUPPORT_SPEAKER_NEAR_ULTRASOUND";
     field public static final java.lang.String RINGER_MODE_CHANGED_ACTION = "android.media.RINGER_MODE_CHANGED";
@@ -20733,6 +20734,7 @@
     field public static final int DEFAULT = 0; // 0x0
     field public static final int MIC = 1; // 0x1
     field public static final int REMOTE_SUBMIX = 8; // 0x8
+    field public static final int UNPROCESSED = 9; // 0x9
     field public static final int VOICE_CALL = 4; // 0x4
     field public static final int VOICE_COMMUNICATION = 7; // 0x7
     field public static final int VOICE_DOWNLINK = 3; // 0x3
diff --git a/core/java/android/provider/Downloads.java b/core/java/android/provider/Downloads.java
index b2d9b934..8472f78 100644
--- a/core/java/android/provider/Downloads.java
+++ b/core/java/android/provider/Downloads.java
@@ -609,7 +609,7 @@
          * This download has successfully completed.
          * Warning: there might be other status values that indicate success
          * in the future.
-         * Use isSucccess() to capture the entire category.
+         * Use isStatusSuccess() to capture the entire category.
          */
         public static final int STATUS_SUCCESS = 200;
 
diff --git a/core/jni/android_media_AudioTrack.cpp b/core/jni/android_media_AudioTrack.cpp
index bc83b7f..61f185e 100644
--- a/core/jni/android_media_AudioTrack.cpp
+++ b/core/jni/android_media_AudioTrack.cpp
@@ -656,18 +656,59 @@
 }
 
 // ----------------------------------------------------------------------------
-static jint android_media_AudioTrack_get_native_frame_count(JNIEnv *env,  jobject thiz) {
+static jint android_media_AudioTrack_get_buffer_size_frames(JNIEnv *env,  jobject thiz) {
     sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
     if (lpTrack == NULL) {
         jniThrowException(env, "java/lang/IllegalStateException",
-            "Unable to retrieve AudioTrack pointer for frameCount()");
+            "Unable to retrieve AudioTrack pointer for getBufferSizeInFrames()");
+        return (jint)AUDIO_JAVA_ERROR;
+    }
+
+    ssize_t result = lpTrack->getBufferSizeInFrames();
+    if (result < 0) {
+        jniThrowException(env, "java/lang/IllegalStateException",
+            "Internal error detected in getBufferSizeInFrames() = " + result);
+        return (jint)AUDIO_JAVA_ERROR;
+    }
+    return (jint)result;
+}
+
+// ----------------------------------------------------------------------------
+static jint android_media_AudioTrack_set_buffer_size_frames(JNIEnv *env,
+        jobject thiz, jint bufferSizeInFrames) {
+    sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
+    if (lpTrack == NULL) {
+        jniThrowException(env, "java/lang/IllegalStateException",
+            "Unable to retrieve AudioTrack pointer for setBufferSizeInFrames()");
+        return (jint)AUDIO_JAVA_ERROR;
+    }
+    // Value will be coerced into the valid range.
+    // But internal values are unsigned, size_t, so we need to clip
+    // against zero here where it is signed.
+    if (bufferSizeInFrames < 0) {
+        bufferSizeInFrames = 0;
+    }
+    ssize_t result = lpTrack->setBufferSizeInFrames(bufferSizeInFrames);
+    if (result < 0) {
+        jniThrowException(env, "java/lang/IllegalStateException",
+            "Internal error detected in setBufferSizeInFrames() = " + result);
+        return (jint)AUDIO_JAVA_ERROR;
+    }
+    return (jint)result;
+}
+
+// ----------------------------------------------------------------------------
+static jint android_media_AudioTrack_get_buffer_capacity_frames(JNIEnv *env,  jobject thiz) {
+    sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
+    if (lpTrack == NULL) {
+        jniThrowException(env, "java/lang/IllegalStateException",
+            "Unable to retrieve AudioTrack pointer for getBufferCapacityInFrames()");
         return (jint)AUDIO_JAVA_ERROR;
     }
 
     return lpTrack->frameCount();
 }
 
-
 // ----------------------------------------------------------------------------
 static jint android_media_AudioTrack_set_playback_rate(JNIEnv *env,  jobject thiz,
         jint sampleRateInHz) {
@@ -1084,8 +1125,12 @@
     {"native_write_short",   "([SIIIZ)I",(void *)android_media_AudioTrack_writeArray<jshortArray>},
     {"native_write_float",   "([FIIIZ)I",(void *)android_media_AudioTrack_writeArray<jfloatArray>},
     {"native_setVolume",     "(FF)V",    (void *)android_media_AudioTrack_set_volume},
-    {"native_get_native_frame_count",
-                             "()I",      (void *)android_media_AudioTrack_get_native_frame_count},
+    {"native_get_buffer_size_frames",
+                             "()I",      (void *)android_media_AudioTrack_get_buffer_size_frames},
+    {"native_set_buffer_size_frames",
+                             "(I)I",     (void *)android_media_AudioTrack_set_buffer_size_frames},
+    {"native_get_buffer_capacity_frames",
+                             "()I",      (void *)android_media_AudioTrack_get_buffer_capacity_frames},
     {"native_set_playback_rate",
                              "(I)I",     (void *)android_media_AudioTrack_set_playback_rate},
     {"native_get_playback_rate",
diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml
index b6150e0..53a733d 100644
--- a/core/res/res/values/config.xml
+++ b/core/res/res/values/config.xml
@@ -2362,6 +2362,9 @@
          (range of 18 - 21 kHz). -->
     <bool name="config_supportSpeakerNearUltrasound">true</bool>
 
+    <!-- Whether the Unprocessed audio source supports the required frequency range and level -->
+    <bool name="config_supportAudioSourceUnprocessed">false</bool>
+
     <!-- Flag indicating device support for EAP SIM, AKA, AKA' -->
     <bool name="config_eap_sim_based_auth_supported">true</bool>
 
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index 3641061..dc288d5 100644
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -303,6 +303,7 @@
   <java-symbol type="bool" name="config_wifi_turn_off_during_emergency_call" />
   <java-symbol type="bool" name="config_supportMicNearUltrasound" />
   <java-symbol type="bool" name="config_supportSpeakerNearUltrasound" />
+  <java-symbol type="bool" name="config_supportAudioSourceUnprocessed" />
   <java-symbol type="bool" name="config_freeformWindowManagement" />
   <java-symbol type="string" name="config_defaultPictureInPictureBounds" />
   <java-symbol type="string" name="config_centeredPictureInPictureBounds" />
diff --git a/media/java/android/media/AudioAttributes.java b/media/java/android/media/AudioAttributes.java
index e92f294..606447b5 100644
--- a/media/java/android/media/AudioAttributes.java
+++ b/media/java/android/media/AudioAttributes.java
@@ -223,10 +223,19 @@
     @SystemApi
     public final static int FLAG_BYPASS_MUTE = 0x1 << 7;
 
+    /**
+     * @hide
+     * Flag requesting a low latency path.
+     * When using this flag, the sample rate must match the native sample rate
+     * of the device. Effects processing is also unavailable.
+     */
+    public final static int FLAG_LOW_LATENCY = 0x1 << 8;
+
     private final static int FLAG_ALL = FLAG_AUDIBILITY_ENFORCED | FLAG_SECURE | FLAG_SCO |
             FLAG_BEACON | FLAG_HW_AV_SYNC | FLAG_HW_HOTWORD | FLAG_BYPASS_INTERRUPTION_POLICY |
-            FLAG_BYPASS_MUTE;
-    private final static int FLAG_ALL_PUBLIC = FLAG_AUDIBILITY_ENFORCED | FLAG_HW_AV_SYNC;
+            FLAG_BYPASS_MUTE | FLAG_LOW_LATENCY;
+    private final static int FLAG_ALL_PUBLIC = FLAG_AUDIBILITY_ENFORCED |
+            FLAG_HW_AV_SYNC | FLAG_LOW_LATENCY;
 
     private int mUsage = USAGE_UNKNOWN;
     private int mContentType = CONTENT_TYPE_UNKNOWN;
@@ -520,8 +529,9 @@
          * instance with {@link AudioRecord#AudioRecord(AudioAttributes, AudioFormat, int)}.
          * @param preset one of {@link MediaRecorder.AudioSource#DEFAULT},
          *     {@link MediaRecorder.AudioSource#MIC}, {@link MediaRecorder.AudioSource#CAMCORDER},
-         *     {@link MediaRecorder.AudioSource#VOICE_RECOGNITION} or
-         *     {@link MediaRecorder.AudioSource#VOICE_COMMUNICATION}.
+         *     {@link MediaRecorder.AudioSource#VOICE_RECOGNITION},
+         *     {@link MediaRecorder.AudioSource#VOICE_COMMUNICATION} or
+         *     {@link MediaRecorder.AudioSource#UNPROCESSED}
          * @return the same Builder instance.
          */
         @SystemApi
@@ -532,6 +542,7 @@
                 case MediaRecorder.AudioSource.CAMCORDER:
                 case MediaRecorder.AudioSource.VOICE_RECOGNITION:
                 case MediaRecorder.AudioSource.VOICE_COMMUNICATION:
+                case MediaRecorder.AudioSource.UNPROCESSED:
                     mSource = preset;
                     break;
                 default:
diff --git a/media/java/android/media/AudioManager.java b/media/java/android/media/AudioManager.java
index ea1690f..5ad6b08 100644
--- a/media/java/android/media/AudioManager.java
+++ b/media/java/android/media/AudioManager.java
@@ -3305,12 +3305,19 @@
             "android.media.property.SUPPORT_SPEAKER_NEAR_ULTRASOUND";
 
     /**
+     * Used as a key for {@link #getProperty} to determine if the unprocessed audio source is
+     * available and supported with the expected frequency range and level response.
+     */
+    public static final String PROPERTY_SUPPORT_AUDIO_SOURCE_UNPROCESSED =
+            "android.media.property.SUPPORT_AUDIO_SOURCE_UNPROCESSED";
+    /**
      * Returns the value of the property with the specified key.
      * @param key One of the strings corresponding to a property key: either
      *            {@link #PROPERTY_OUTPUT_SAMPLE_RATE},
      *            {@link #PROPERTY_OUTPUT_FRAMES_PER_BUFFER},
-     *            {@link #PROPERTY_SUPPORT_MIC_NEAR_ULTRASOUND}, or
-     *            {@link #PROPERTY_SUPPORT_SPEAKER_NEAR_ULTRASOUND}.
+     *            {@link #PROPERTY_SUPPORT_MIC_NEAR_ULTRASOUND},
+     *            {@link #PROPERTY_SUPPORT_SPEAKER_NEAR_ULTRASOUND}, or
+     *            {@link #PROPERTY_SUPPORT_AUDIO_SOURCE_UNPROCESSED}.
      * @return A string representing the associated value for that property key,
      *         or null if there is no value for that key.
      */
@@ -3329,6 +3336,9 @@
         } else if (PROPERTY_SUPPORT_SPEAKER_NEAR_ULTRASOUND.equals(key)) {
             return String.valueOf(getContext().getResources().getBoolean(
                     com.android.internal.R.bool.config_supportSpeakerNearUltrasound));
+        } else if (PROPERTY_SUPPORT_AUDIO_SOURCE_UNPROCESSED.equals(key)) {
+            return String.valueOf(getContext().getResources().getBoolean(
+                    com.android.internal.R.bool.config_supportAudioSourceUnprocessed));
         } else {
             // null or unknown key
             return null;
diff --git a/media/java/android/media/AudioTrack.java b/media/java/android/media/AudioTrack.java
index 775d05b..4319840 100644
--- a/media/java/android/media/AudioTrack.java
+++ b/media/java/android/media/AudioTrack.java
@@ -1052,8 +1052,68 @@
         }
     }
 
+// TODO Change getBufferCapacityInFrames() reference below to
+// {@link #getBufferCapacityInFrames()} after @hide is removed.
+// TODO Change setBufferSizeInFrames(int) reference below to
+// {@link #setBufferSizeInFrames(int)} after @hide is removed.
     /**
-     *  Returns the frame count of the native <code>AudioTrack</code> buffer.
+     *  Returns the effective size of the <code>AudioTrack</code> buffer
+     * that the application writes to.
+     *  <p> This will be less than or equal to the result of
+     * getBufferCapacityInFrames().
+     * It will be equal if setBufferSizeInFrames(int) has never been called.
+     *  <p> If the track is subsequently routed to a different output sink, the buffer
+     *  size and capacity may enlarge to accommodate.
+     *  <p> If the <code>AudioTrack</code> encoding indicates compressed data,
+     *  e.g. {@link AudioFormat#ENCODING_AC3}, then the frame count returned is
+     *  the size of the native <code>AudioTrack</code> buffer in bytes.
+     *  <p> See also {@link AudioManager#getProperty(String)} for key
+     *  {@link AudioManager#PROPERTY_OUTPUT_FRAMES_PER_BUFFER}.
+     *  @return current size in frames of the <code>AudioTrack</code> buffer.
+     *  @throws IllegalStateException
+     */
+    public int getBufferSizeInFrames() {
+        return native_get_buffer_size_frames();
+    }
+
+// TODO Change getBufferCapacityInFrames() reference below to
+// {@link #getBufferCapacityInFrames()} after @hide is removed.
+    /**
+     * Limits the effective size of the <code>AudioTrack</code> buffer
+     * that the application writes to.
+     * <p> A write to this AudioTrack will not fill the buffer beyond this limit.
+     * If a blocking write is used then the write will block until the the data
+     * can fit within this limit.
+     * <p>Changing this limit modifies the latency associated with
+     * the buffer for this track. A smaller size will give lower latency
+     * but there may be more glitches due to buffer underruns.
+     *  <p>The actual size used may not be equal to this requested size.
+     * It will be limited to a valid range with a maximum of
+     * getBufferCapacityInFrames().
+     * It may also be adjusted slightly for internal reasons.
+     * If bufferSizeInFrames is less than zero then {@link #ERROR_BAD_VALUE}
+     * will be returned.
+     * <p>This method is only supported for PCM audio.
+     * It is not supported for compressed audio tracks.
+     *
+     * @param bufferSizeInFrames requested buffer size
+     * @return error code or success, see {@link #SUCCESS}, {@link #ERROR_BAD_VALUE},
+     *    {@link #ERROR_INVALID_OPERATION}
+     *  @throws IllegalStateException
+     * @hide
+     */
+    public int setBufferSizeInFrames(int bufferSizeInFrames) {
+        if (mDataLoadMode == MODE_STATIC || mState == STATE_UNINITIALIZED) {
+            return ERROR_INVALID_OPERATION;
+        }
+        if (bufferSizeInFrames < 0) {
+            return ERROR_BAD_VALUE;
+        }
+        return native_set_buffer_size_frames(bufferSizeInFrames);
+    }
+
+    /**
+     *  Returns the maximum size of the native <code>AudioTrack</code> buffer.
      *  <p> If the track's creation mode is {@link #MODE_STATIC},
      *  it is equal to the specified bufferSizeInBytes on construction, converted to frame units.
      *  A static track's native frame count will not change.
@@ -1068,11 +1128,12 @@
      *  the size of the native <code>AudioTrack</code> buffer in bytes.
      *  <p> See also {@link AudioManager#getProperty(String)} for key
      *  {@link AudioManager#PROPERTY_OUTPUT_FRAMES_PER_BUFFER}.
-     *  @return current size in frames of the <code>AudioTrack</code> buffer.
+     *  @return maximum size in frames of the <code>AudioTrack</code> buffer.
      *  @throws IllegalStateException
+     * @hide
      */
-    public int getBufferSizeInFrames() {
-        return native_get_native_frame_count();
+    public int getBufferCapacityInFrames() {
+        return native_get_buffer_capacity_frames();
     }
 
     /**
@@ -1083,7 +1144,7 @@
      */
     @Deprecated
     protected int getNativeFrameCount() {
-        return native_get_native_frame_count();
+        return native_get_buffer_capacity_frames();
     }
 
     /**
@@ -2719,7 +2780,9 @@
 
     private native final int native_reload_static();
 
-    private native final int native_get_native_frame_count();
+    private native final int native_get_buffer_size_frames();
+    private native final int native_set_buffer_size_frames(int bufferSizeInFrames);
+    private native final int native_get_buffer_capacity_frames();
 
     private native final void native_setVolume(float leftVolume, float rightVolume);
 
diff --git a/media/java/android/media/MediaRecorder.java b/media/java/android/media/MediaRecorder.java
index 8ac86b0..504c6d0 100644
--- a/media/java/android/media/MediaRecorder.java
+++ b/media/java/android/media/MediaRecorder.java
@@ -251,6 +251,10 @@
          */
         public static final int REMOTE_SUBMIX = 8;
 
+        /** Microphone audio source tuned for unprocessed (raw) sound if available, behaves like
+         *  {@link #DEFAULT} otherwise. */
+        public static final int UNPROCESSED = 9;
+
         /**
          * Audio source for capturing broadcast radio tuner output.
          * @hide
@@ -405,7 +409,7 @@
      * @see android.media.MediaRecorder.AudioSource
      */
     public static final int getAudioSourceMax() {
-        return AudioSource.REMOTE_SUBMIX;
+        return AudioSource.UNPROCESSED;
     }
 
     /**