Default to minimum buffer size for AudioRecord.Builder (864ae678) · Commits · e / os / android_frameworks_base

api/current.txt

+1 −0

Original line number	Diff line number	Diff line
		@@ -14740,6 +14740,7 @@ package android.media {
		method public int getChannelConfiguration();
		method public int getChannelCount();
		method public static int getMinBufferSize(int, int, int);
		method public int getNativeFrameCount() throws java.lang.IllegalStateException;
		method public int getNotificationMarkerPosition();
		method public int getPositionNotificationPeriod();
		method public int getRecordingState();

api/system-current.txt

+1 −0

Original line number	Diff line number	Diff line
		@@ -15950,6 +15950,7 @@ package android.media {
		method public int getChannelConfiguration();
		method public int getChannelCount();
		method public static int getMinBufferSize(int, int, int);
		method public int getNativeFrameCount() throws java.lang.IllegalStateException;
		method public int getNotificationMarkerPosition();
		method public int getPositionNotificationPeriod();
		method public int getRecordingState();

core/jni/android_media_AudioRecord.cpp

+13 −0

Original line number	Diff line number	Diff line
		@@ -523,6 +523,17 @@ static jint android_media_AudioRecord_readInDirectBuffer(JNIEnv *env, jobject t
		}


		// ----------------------------------------------------------------------------
		static jint android_media_AudioRecord_get_native_frame_count(JNIEnv *env, jobject thiz) {
		sp<AudioRecord> lpRecorder = getAudioRecord(env, thiz);
		if (lpRecorder == NULL) {
		jniThrowException(env, "java/lang/IllegalStateException",
		"Unable to retrieve AudioRecord pointer for getNativeFrameCount()");
		return (jint)AUDIO_JAVA_ERROR;
		}
		return lpRecorder->frameCount();
		}

		// ----------------------------------------------------------------------------
		static jint android_media_AudioRecord_set_marker_pos(JNIEnv *env, jobject thiz,
		jint markerPos) {
		@@ -629,6 +640,8 @@ static JNINativeMethod gMethods[] = {
		"([FIIZ)I", (void *)android_media_AudioRecord_readInFloatArray},
		{"native_read_in_direct_buffer","(Ljava/lang/Object;I)I",
		(void *)android_media_AudioRecord_readInDirectBuffer},
		{"native_get_native_frame_count",
		"()I", (void *)android_media_AudioRecord_get_native_frame_count},
		{"native_set_marker_pos","(I)I", (void *)android_media_AudioRecord_set_marker_pos},
		{"native_get_marker_pos","()I", (void *)android_media_AudioRecord_get_marker_pos},
		{"native_set_pos_update_period",

media/java/android/media/AudioRecord.java

+28 −3

Original line number	Diff line number	Diff line
		@@ -398,8 +398,8 @@ public class AudioRecord
		* default output sample rate of the device (see
		* {@link AudioManager#PROPERTY_OUTPUT_SAMPLE_RATE}), its channel configuration will be
		* {@link AudioFormat#CHANNEL_IN_DEFAULT}.
		* <br>Failing to set an adequate buffer size with {@link #setBufferSizeInBytes(int)} will
		* prevent the successful creation of an <code>AudioRecord</code> instance.
		* <br>If the buffer size is not specified with {@link #setBufferSizeInBytes(int)},
		* the minimum buffer size for the source is used.
		*/
		public static class Builder {
		private AudioAttributes mAttributes;
		@@ -473,7 +473,9 @@ public class AudioRecord
		* during the recording. New audio data can be read from this buffer in smaller chunks
		* than this size. See {@link #getMinBufferSize(int, int, int)} to determine the minimum
		* required buffer size for the successful creation of an AudioRecord instance.
		* Using values smaller than getMinBufferSize() will result in an initialization failure.
		* Since bufferSizeInBytes may be internally increased to accommodate the source
		* requirements, use {@link #getNativeFrameCount()} to determine the actual buffer size
		* in frames.
		* @param bufferSizeInBytes a value strictly greater than 0
		* @return the same Builder instance.
		* @throws IllegalArgumentException
		@@ -520,6 +522,13 @@ public class AudioRecord
		.build();
		}
		try {
		// If the buffer size is not specified,
		// use a single frame for the buffer size and let the
		// native code figure out the minimum buffer size.
		if (mBufferSizeInBytes == 0) {
		mBufferSizeInBytes = mFormat.getChannelCount()
		* mFormat.getBytesPerSample(mFormat.getEncoding());
		}
		return new AudioRecord(mAttributes, mFormat, mBufferSizeInBytes, mSessionId);
		} catch (IllegalArgumentException e) {
		throw new UnsupportedOperationException(e.getMessage());
		@@ -710,6 +719,20 @@ public class AudioRecord
		}
		}

		/**
		* Returns the "native frame count" of the <code>AudioRecord</code> buffer.
		* This is greater than or equal to the bufferSizeInBytes converted to frame units
		* specified in the <code>AudioRecord</code> constructor or Builder.
		* The native frame count may be enlarged to accommodate the requirements of the
		* source on creation or if the <code>AudioRecord</code>
		* is subsequently rerouted.
		* @return current size in frames of the <code>AudioRecord</code> buffer.
		* @throws IllegalStateException
		*/
		public int getNativeFrameCount() throws IllegalStateException {
		return native_get_native_frame_count();
		}

		/**
		* Returns the notification marker position expressed in frames.
		*/
		@@ -1173,6 +1196,8 @@ public class AudioRecord

		private native final int native_read_in_direct_buffer(Object jBuffer, int sizeInBytes);

		private native final int native_get_native_frame_count();

		private native final int native_set_marker_pos(int marker);
		private native final int native_get_marker_pos();