SampleVideoEncoder: Display Frame-type of the encoded stream (da63dfe1) · Commits · e / os / android_frameworks_av

media/tests/SampleVideoEncoder/app/src/main/java/com/android/media/samplevideoencoder/MainActivity.java

+23 −0

Original line number	Diff line number	Diff line
		@@ -56,6 +56,7 @@ import java.io.IOException;
		import android.util.Log;
		import android.util.Size;
		import android.widget.RadioGroup;
		import android.widget.TextView;
		import android.widget.Toast;

		import java.lang.ref.WeakReference;
		@@ -80,6 +81,14 @@ public class MainActivity extends AppCompatActivity
		private static final int VIDEO_BITRATE = 8000000 /* 8 Mbps */;
		private static final int VIDEO_FRAMERATE = 30;

		/**
		* Constant values to frame types assigned here are internal to this app.
		* These values does not correspond to the actual values defined in avc/hevc specifications.
		*/
		public static final int FRAME_TYPE_I = 0;
		public static final int FRAME_TYPE_P = 1;
		public static final int FRAME_TYPE_B = 2;

		private String mMime = MediaFormat.MIMETYPE_VIDEO_AVC;
		private String mOutputVideoPath = null;

		@@ -89,6 +98,7 @@ public class MainActivity extends AppCompatActivity
		private boolean mIsRecording;

		private AutoFitTextureView mTextureView;
		private TextView mTextView;
		private CameraDevice mCameraDevice;
		private CameraCaptureSession mPreviewSession;
		private CaptureRequest.Builder mPreviewBuilder;
		@@ -101,6 +111,8 @@ public class MainActivity extends AppCompatActivity

		private Button mStartButton;

		private int[] mFrameTypeOccurrences;

		@Override
		protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		@@ -129,6 +141,8 @@ public class MainActivity extends AppCompatActivity
		final CheckBox checkBox_mr = findViewById(R.id.checkBox_media_recorder);
		final CheckBox checkBox_mc = findViewById(R.id.checkBox_media_codec);
		mTextureView = findViewById(R.id.texture);
		mTextView = findViewById(R.id.textViewResults);

		checkBox_mr.setOnClickListener(new View.OnClickListener() {
		@Override
		public void onClick(View v) {
		@@ -162,6 +176,7 @@ public class MainActivity extends AppCompatActivity
		@Override
		public void onClick(View v) {
		if (v.getId() == R.id.start_button) {
		mTextView.setText(null);
		if (mIsMediaRecorder) {
		if (mIsRecording) {
		stopRecordingVideo();
		@@ -198,6 +213,7 @@ public class MainActivity extends AppCompatActivity
		mainActivity.mOutputVideoPath);
		try {
		encodingStatus = codecSurfaceEncoder.startEncodingSurface();
		mainActivity.mFrameTypeOccurrences = codecSurfaceEncoder.getFrameTypes();
		} catch (IOException \| InterruptedException e) {
		e.printStackTrace();
		}
		@@ -211,6 +227,13 @@ public class MainActivity extends AppCompatActivity
		if (encodingStatus == 0) {
		Toast.makeText(mainActivity.getApplicationContext(), "Encoding Completed",
		Toast.LENGTH_SHORT).show();
		mainActivity.mTextView.append("\n Encoded stream contains: ");
		mainActivity.mTextView.append("\n Number of I-Frames: " +
		mainActivity.mFrameTypeOccurrences[FRAME_TYPE_I]);
		mainActivity.mTextView.append("\n Number of P-Frames: " +
		mainActivity.mFrameTypeOccurrences[FRAME_TYPE_P]);
		mainActivity.mTextView.append("\n Number of B-Frames: " +
		mainActivity.mFrameTypeOccurrences[FRAME_TYPE_B]);
		} else {
		Toast.makeText(mainActivity.getApplicationContext(),
		"Error occurred while " + "encoding", Toast.LENGTH_SHORT).show();

media/tests/SampleVideoEncoder/app/src/main/java/com/android/media/samplevideoencoder/MediaCodecSurfaceEncoder.java

+31 −2

Original line number	Diff line number	Diff line
		@@ -31,10 +31,14 @@ import android.view.Surface;
		import java.io.IOException;
		import java.nio.ByteBuffer;
		import java.util.ArrayList;
		import java.util.Arrays;

		import static com.android.media.samplevideoencoder.MainActivity.FRAME_TYPE_B;
		import static com.android.media.samplevideoencoder.MainActivity.FRAME_TYPE_I;
		import static com.android.media.samplevideoencoder.MainActivity.FRAME_TYPE_P;

		public class MediaCodecSurfaceEncoder {
		private static final String TAG = MediaCodecSurfaceEncoder.class.getSimpleName();

		private static final boolean DEBUG = false;
		private static final int VIDEO_BITRATE = 8000000 /8 Mbps/;
		private static final int VIDEO_FRAMERATE = 30;
		@@ -44,6 +48,8 @@ public class MediaCodecSurfaceEncoder {
		private final String mMime;
		private final String mOutputPath;
		private int mTrackID = -1;
		private int mFrameNum = 0;
		private int[] mFrameTypeOccurrences = {0, 0, 0};

		private Surface mSurface;
		private MediaExtractor mExtractor;
		@@ -128,8 +134,10 @@ public class MediaCodecSurfaceEncoder {
		mEncoder.reset();
		mSurface.release();
		mSurface = null;
		Log.i(TAG, "Number of I-frames = " + mFrameTypeOccurrences[FRAME_TYPE_I]);
		Log.i(TAG, "Number of P-frames = " + mFrameTypeOccurrences[FRAME_TYPE_P]);
		Log.i(TAG, "Number of B-frames = " + mFrameTypeOccurrences[FRAME_TYPE_B]);
		}

		mEncoder.release();
		mDecoder.release();
		mExtractor.release();
		@@ -193,6 +201,8 @@ public class MediaCodecSurfaceEncoder {
		mSawEncOutputEOS = false;
		mDecOutputCount = 0;
		mEncOutputCount = 0;
		mFrameNum = 0;
		Arrays.fill(mFrameTypeOccurrences, 0);
		}

		private void configureCodec(MediaFormat decFormat, MediaFormat encFormat) {
		@@ -336,6 +346,21 @@ public class MediaCodecSurfaceEncoder {
		}
		if (info.size > 0) {
		ByteBuffer buf = mEncoder.getOutputBuffer(bufferIndex);
		// Parse the buffer to get the frame type
		if (DEBUG) Log.d(TAG, "[ Frame : " + (mFrameNum++) + " ]");
		int frameTypeResult = -1;
		if (mMime == MediaFormat.MIMETYPE_VIDEO_AVC) {
		frameTypeResult = NalUnitUtil.getStandardizedFrameTypesFromAVC(buf);
		} else if (mMime == MediaFormat.MIMETYPE_VIDEO_HEVC){
		frameTypeResult = NalUnitUtil.getStandardizedFrameTypesFromHEVC(buf);
		} else {
		Log.e(TAG, "Mime type " + mMime + " is not supported.");
		return;
		}
		if (frameTypeResult != -1) {
		mFrameTypeOccurrences[frameTypeResult]++;
		}

		if (mMuxer != null) {
		if (mTrackID == -1) {
		mTrackID = mMuxer.addTrack(mEncoder.getOutputFormat());
		@@ -353,4 +378,8 @@ public class MediaCodecSurfaceEncoder {
		private boolean hasSeenError() {
		return mAsyncHandleDecoder.hasSeenError() \|\| mAsyncHandleEncoder.hasSeenError();
		}

		public int[] getFrameTypes() {
		return mFrameTypeOccurrences;
		}
		}

media/tests/SampleVideoEncoder/app/src/main/java/com/android/media/samplevideoencoder/NalUnitUtil.java

0 → 100644

+168 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2020 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package com.android.media.samplevideoencoder;

		import android.util.Log;

		import java.nio.ByteBuffer;

		import static com.android.media.samplevideoencoder.MainActivity.FRAME_TYPE_B;
		import static com.android.media.samplevideoencoder.MainActivity.FRAME_TYPE_I;
		import static com.android.media.samplevideoencoder.MainActivity.FRAME_TYPE_P;

		public class NalUnitUtil {
		private static final String TAG = MediaCodecSurfaceEncoder.class.getSimpleName();
		private static final boolean DEBUG = false;

		public static int findNalUnit(byte[] dataArray, int pos, int limit) {
		int startOffset = 0;
		if (limit - pos < 4) {
		return startOffset;
		}
		if (dataArray[pos] == 0 && dataArray[pos + 1] == 0 && dataArray[pos + 2] == 1) {
		startOffset = 3;
		} else {
		if (dataArray[pos] == 0 && dataArray[pos + 1] == 0 && dataArray[pos + 2] == 0 &&
		dataArray[pos + 3] == 1) {
		startOffset = 4;
		}
		}
		return startOffset;
		}

		private static int getAVCNalUnitType(byte[] dataArray, int nalUnitOffset) {
		return dataArray[nalUnitOffset] & 0x1F;
		}

		private static int parseAVCNALUnitData(byte[] dataArray, int offset, int limit) {
		ParsableBitArray bitArray = new ParsableBitArray(dataArray);
		bitArray.reset(dataArray, offset, limit);

		bitArray.skipBit(); // forbidden_zero_bit
		bitArray.readBits(2); // nal_ref_idc
		bitArray.skipBits(5); // nal_unit_type

		bitArray.readUEV(); // first_mb_in_slice
		if (!bitArray.canReadUEV()) {
		return -1;
		}
		int sliceType = bitArray.readUEV();
		if (DEBUG) Log.d(TAG, "slice_type = " + sliceType);
		if (sliceType == 0) {
		return FRAME_TYPE_P;
		} else if (sliceType == 1) {
		return FRAME_TYPE_B;
		} else if (sliceType == 2) {
		return FRAME_TYPE_I;
		} else {
		return -1;
		}
		}

		private static int getHEVCNalUnitType(byte[] dataArray, int nalUnitOffset) {
		return (dataArray[nalUnitOffset] & 0x7E) >> 1;
		}

		private static int parseHEVCNALUnitData(byte[] dataArray, int offset, int limit,
		int nalUnitType) {
		// nal_unit_type values from H.265/HEVC Table 7-1.
		final int BLA_W_LP = 16;
		final int RSV_IRAP_VCL23 = 23;

		ParsableBitArray bitArray = new ParsableBitArray(dataArray);
		bitArray.reset(dataArray, offset, limit);

		bitArray.skipBit(); // forbidden zero bit
		bitArray.readBits(6); // nal_unit_header
		bitArray.readBits(6); // nuh_layer_id
		bitArray.readBits(3); // nuh_temporal_id_plus1

		// Parsing slice_segment_header values from H.265/HEVC Table 7.3.6.1
		boolean first_slice_segment = bitArray.readBit(); // first_slice_segment_in_pic_flag
		if (!first_slice_segment) return -1;
		if (nalUnitType >= BLA_W_LP && nalUnitType <= RSV_IRAP_VCL23) {
		bitArray.readBit(); // no_output_of_prior_pics_flag
		}
		bitArray.readUEV(); // slice_pic_parameter_set_id
		// Assume num_extra_slice_header_bits element of PPS data to be 0
		int sliceType = bitArray.readUEV();
		if (DEBUG) Log.d(TAG, "slice_type = " + sliceType);
		if (sliceType == 0) {
		return FRAME_TYPE_B;
		} else if (sliceType == 1) {
		return FRAME_TYPE_P;
		} else if (sliceType == 2) {
		return FRAME_TYPE_I;
		} else {
		return -1;
		}
		}

		public static int getStandardizedFrameTypesFromAVC(ByteBuffer buf) {
		int limit = buf.limit();
		byte[] dataArray = new byte[buf.remaining()];
		buf.get(dataArray);
		int frameType = -1;
		for (int pos = 0; pos + 3 < limit; ) {
		int startOffset = NalUnitUtil.findNalUnit(dataArray, pos, limit);
		if (startOffset != 0) {
		int nalUnitType = getAVCNalUnitType(dataArray, (pos + startOffset));
		if (DEBUG) {
		Log.d(TAG, "NalUnitOffset = " + (pos + startOffset));
		Log.d(TAG, "NalUnitType = " + nalUnitType);
		}
		// SLICE_NAL = 1; IDR_SLICE_NAL = 5
		if (nalUnitType == 1 \|\| nalUnitType == 5) {
		frameType = parseAVCNALUnitData(dataArray, (pos + startOffset),
		(limit - pos - startOffset));
		break;
		}
		pos += 3;
		} else {
		pos++;
		}
		}
		return frameType;
		}

		public static int getStandardizedFrameTypesFromHEVC(ByteBuffer buf) {
		int limit = buf.limit();
		byte[] dataArray = new byte[buf.remaining()];
		buf.get(dataArray);
		int frameType = -1;
		for (int pos = 0; pos + 3 < limit; ) {
		int startOffset = NalUnitUtil.findNalUnit(dataArray, pos, limit);
		if (startOffset != 0) {
		int nalUnitType = NalUnitUtil.getHEVCNalUnitType(dataArray, (pos + startOffset));
		if (DEBUG) {
		Log.d(TAG, "NalUnitOffset = " + (pos + startOffset));
		Log.d(TAG, "NalUnitType = " + nalUnitType);
		}
		// Parse NALUnits containing slice_headers which lies in the range of 0 to 21
		if (nalUnitType >= 0 && nalUnitType <= 21) {
		frameType = parseHEVCNALUnitData(dataArray, (pos + startOffset),
		(limit - pos - startOffset), nalUnitType);
		break;
		}
		pos += 3;
		} else {
		pos++;
		}
		}
		return frameType;
		}
		}

media/tests/SampleVideoEncoder/app/src/main/java/com/android/media/samplevideoencoder/ParsableBitArray.java

0 → 100644

+128 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2016 The Android Open Source Project
		*
		* Licensed under the Apache License, Version 2.0 (the "License");
		* you may not use this file except in compliance with the License.
		* You may obtain a copy of the License at
		*
		* http://www.apache.org/licenses/LICENSE-2.0
		*
		* Unless required by applicable law or agreed to in writing, software
		* distributed under the License is distributed on an "AS IS" BASIS,
		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
		* See the License for the specific language governing permissions and
		* limitations under the License.
		*/

		package com.android.media.samplevideoencoder;

		public class ParsableBitArray {
		public byte[] data;
		private int byteOffset;
		private int bitOffset;
		private int byteLimit;

		public ParsableBitArray(byte[] dataArray) {
		this(dataArray, dataArray.length);
		}

		public ParsableBitArray(byte[] dataArray, int limit) {
		this.data = dataArray;
		byteLimit = limit;
		}

		public void reset(byte[] data, int offset, int limit) {
		this.data = data;
		byteOffset = offset;
		bitOffset = 0;
		byteLimit = limit;
		}

		public void skipBit() {
		if (++bitOffset == 8) {
		bitOffset = 0;
		byteOffset++;
		}
		}

		public void skipBits(int numBits) {
		int numBytes = numBits / 8;
		byteOffset += numBytes;
		bitOffset += numBits - (numBytes * 8);
		if (bitOffset > 7) {
		byteOffset++;
		bitOffset -= 8;
		}
		}

		public boolean readBit() {
		boolean returnValue = (data[byteOffset] & (0x80 >> bitOffset)) != 0;
		skipBit();
		return returnValue;
		}

		public int readBits(int numBits) {
		if (numBits == 0) {
		return 0;
		}
		int returnValue = 0;
		bitOffset += numBits;
		while (bitOffset > 8) {
		bitOffset -= 8;
		returnValue \|= (data[byteOffset++] & 0xFF) << bitOffset;
		}
		returnValue \|= (data[byteOffset] & 0xFF) >> (8 - bitOffset);
		returnValue &= 0xFFFFFFFF >>> (32 - numBits);
		if (bitOffset == 8) {
		bitOffset = 0;
		byteOffset++;
		}
		return returnValue;
		}

		public boolean canReadUEV() {
		int initialByteOffset = byteOffset;
		int initialBitOffset = bitOffset;
		int leadingZeros = 0;
		while (byteOffset < byteLimit && !readBit()) {
		leadingZeros++;
		}
		boolean hitLimit = byteOffset == byteLimit;
		byteOffset = initialByteOffset;
		bitOffset = initialBitOffset;
		return !hitLimit && canReadBits(leadingZeros * 2 + 1);
		}

		public int readUEV() {
		int leadingZeros = 0;
		while (!readBit()) {
		leadingZeros++;
		}
		return (1 << leadingZeros) - 1 + (leadingZeros > 0 ? readBits(leadingZeros) : 0);
		}

		public boolean canReadBits(int numBits) {
		int oldByteOffset = byteOffset;
		int numBytes = numBits / 8;
		int newByteOffset = byteOffset + numBytes;
		int newBitOffset = bitOffset + numBits - (numBytes * 8);
		if (newBitOffset > 7) {
		newByteOffset++;
		newBitOffset -= 8;
		}
		for (int i = oldByteOffset + 1; i <= newByteOffset && newByteOffset < byteLimit; i++) {
		if (shouldSkipByte(i)) {
		// Skip the byte and check three bytes ahead.
		newByteOffset++;
		i += 2;
		}
		}
		return newByteOffset < byteLimit \|\| (newByteOffset == byteLimit && newBitOffset == 0);
		}

		private boolean shouldSkipByte(int offset) {
		return (2 <= offset && offset < byteLimit && data[offset] == (byte) 0x03 &&
		data[offset - 2] == (byte) 0x00 && data[offset - 1] == (byte) 0x00);
		}

		}

media/tests/SampleVideoEncoder/app/src/main/res/layout/activity_main.xml

+11 −0

Original line number	Diff line number	Diff line
		@@ -124,4 +124,15 @@

		</FrameLayout>

		<TextView
		android:id="@+id/textViewResults"
		android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:layout_marginTop="10dp"
		android:fontFamily="sans-serif-medium"
		android:textSize="18sp"
		android:textStyle="normal"
		app:layout_constraintStart_toStartOf="parent"
		app:layout_constraintTop_toBottomOf = "@+id/frameLayout2" />

		</androidx.constraintlayout.widget.ConstraintLayout>