| /* |
| * Copyright 2013 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 androidx.media.filterfw.decoder; |
| |
| import android.annotation.TargetApi; |
| import android.graphics.SurfaceTexture; |
| import android.media.MediaCodec; |
| import android.media.MediaCodec.BufferInfo; |
| import android.media.MediaCodecInfo; |
| import android.media.MediaCodecInfo.CodecCapabilities; |
| import android.media.MediaCodecList; |
| import android.media.MediaFormat; |
| import android.util.SparseIntArray; |
| import androidx.media.filterfw.ColorSpace; |
| import androidx.media.filterfw.Frame; |
| import androidx.media.filterfw.FrameImage2D; |
| import androidx.media.filterfw.PixelUtils; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Arrays; |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.TreeMap; |
| |
| /** |
| * {@link TrackDecoder} that decodes a video track and renders the frames onto a |
| * {@link SurfaceTexture}. |
| * |
| * This implementation purely uses CPU based methods to decode and color-convert the frames. |
| */ |
| @TargetApi(16) |
| public class CpuVideoTrackDecoder extends VideoTrackDecoder { |
| |
| private static final int COLOR_FORMAT_UNSET = -1; |
| |
| private final int mWidth; |
| private final int mHeight; |
| |
| private int mColorFormat = COLOR_FORMAT_UNSET; |
| private long mCurrentPresentationTimeUs; |
| private ByteBuffer mDecodedBuffer; |
| private ByteBuffer mUnrotatedBytes; |
| |
| protected CpuVideoTrackDecoder(int trackIndex, MediaFormat format, Listener listener) { |
| super(trackIndex, format, listener); |
| |
| mWidth = format.getInteger(MediaFormat.KEY_WIDTH); |
| mHeight = format.getInteger(MediaFormat.KEY_HEIGHT); |
| } |
| |
| @Override |
| protected MediaCodec initMediaCodec(MediaFormat format) { |
| // Find a codec for our video that can output to one of our supported color-spaces |
| MediaCodec mediaCodec = findDecoderCodec(format, new int[] { |
| CodecCapabilities.COLOR_Format32bitARGB8888, |
| CodecCapabilities.COLOR_FormatYUV420Planar}); |
| if (mediaCodec == null) { |
| throw new RuntimeException( |
| "Could not find a suitable decoder for format: " + format + "!"); |
| } |
| mediaCodec.configure(format, null, null, 0); |
| return mediaCodec; |
| } |
| |
| @Override |
| protected boolean onDataAvailable( |
| MediaCodec codec, ByteBuffer[] buffers, int bufferIndex, BufferInfo info) { |
| |
| mCurrentPresentationTimeUs = info.presentationTimeUs; |
| mDecodedBuffer = buffers[bufferIndex]; |
| |
| if (mColorFormat == -1) { |
| mColorFormat = codec.getOutputFormat().getInteger(MediaFormat.KEY_COLOR_FORMAT); |
| } |
| |
| markFrameAvailable(); |
| notifyListener(); |
| |
| // Wait for the grab before we release this buffer. |
| waitForFrameGrab(); |
| |
| codec.releaseOutputBuffer(bufferIndex, false); |
| |
| return false; |
| } |
| |
| @Override |
| protected void copyFrameDataTo(FrameImage2D outputVideoFrame, int rotation) { |
| // Calculate output dimensions |
| int outputWidth = mWidth; |
| int outputHeight = mHeight; |
| if (needSwapDimension(rotation)) { |
| outputWidth = mHeight; |
| outputHeight = mWidth; |
| } |
| |
| // Create output frame |
| outputVideoFrame.resize(new int[] {outputWidth, outputHeight}); |
| outputVideoFrame.setTimestamp(mCurrentPresentationTimeUs * 1000); |
| ByteBuffer outBytes = outputVideoFrame.lockBytes(Frame.MODE_WRITE); |
| |
| // Set data |
| if (rotation == MediaDecoder.ROTATE_NONE) { |
| convertImage(mDecodedBuffer, outBytes, mColorFormat, mWidth, mHeight); |
| } else { |
| if (mUnrotatedBytes == null) { |
| mUnrotatedBytes = ByteBuffer.allocateDirect(mWidth * mHeight * 4); |
| } |
| // TODO: This could be optimized by including the rotation in the color conversion. |
| convertImage(mDecodedBuffer, mUnrotatedBytes, mColorFormat, mWidth, mHeight); |
| copyRotate(mUnrotatedBytes, outBytes, rotation); |
| } |
| outputVideoFrame.unlock(); |
| } |
| |
| /** |
| * Copy the input data to the output data applying the specified rotation. |
| * |
| * @param input The input image data |
| * @param output Buffer for the output image data |
| * @param rotation The rotation to apply |
| */ |
| private void copyRotate(ByteBuffer input, ByteBuffer output, int rotation) { |
| int offset; |
| int pixStride; |
| int rowStride; |
| switch (rotation) { |
| case MediaDecoder.ROTATE_NONE: |
| offset = 0; |
| pixStride = 1; |
| rowStride = mWidth; |
| break; |
| case MediaDecoder.ROTATE_90_LEFT: |
| offset = (mWidth - 1) * mHeight; |
| pixStride = -mHeight; |
| rowStride = 1; |
| break; |
| case MediaDecoder.ROTATE_90_RIGHT: |
| offset = mHeight - 1; |
| pixStride = mHeight; |
| rowStride = -1; |
| break; |
| case MediaDecoder.ROTATE_180: |
| offset = mWidth * mHeight - 1; |
| pixStride = -1; |
| rowStride = -mWidth; |
| break; |
| default: |
| throw new IllegalArgumentException("Unsupported rotation " + rotation + "!"); |
| } |
| PixelUtils.copyPixels(input, output, mWidth, mHeight, offset, pixStride, rowStride); |
| } |
| |
| /** |
| * Looks for a codec with the specified requirements. |
| * |
| * The set of codecs will be filtered down to those that meet the following requirements: |
| * <ol> |
| * <li>The codec is a decoder.</li> |
| * <li>The codec can decode a video of the specified format.</li> |
| * <li>The codec can decode to one of the specified color formats.</li> |
| * </ol> |
| * If multiple codecs are found, the one with the preferred color-format is taken. Color format |
| * preference is determined by the order of their appearance in the color format array. |
| * |
| * @param format The format the codec must decode. |
| * @param requiredColorFormats Array of target color spaces ordered by preference. |
| * @return A codec that meets the requirements, or null if no such codec was found. |
| */ |
| private static MediaCodec findDecoderCodec(MediaFormat format, int[] requiredColorFormats) { |
| TreeMap<Integer, String> candidateCodecs = new TreeMap<Integer, String>(); |
| SparseIntArray colorPriorities = intArrayToPriorityMap(requiredColorFormats); |
| for (int i = 0; i < MediaCodecList.getCodecCount(); ++i) { |
| // Get next codec |
| MediaCodecInfo info = MediaCodecList.getCodecInfoAt(i); |
| |
| // Check that this is a decoder |
| if (info.isEncoder()) { |
| continue; |
| } |
| |
| // Check if this codec can decode the video in question |
| String requiredType = format.getString(MediaFormat.KEY_MIME); |
| String[] supportedTypes = info.getSupportedTypes(); |
| Set<String> typeSet = new HashSet<String>(Arrays.asList(supportedTypes)); |
| |
| // Check if it can decode to one of the required color formats |
| if (typeSet.contains(requiredType)) { |
| CodecCapabilities capabilities = info.getCapabilitiesForType(requiredType); |
| for (int supportedColorFormat : capabilities.colorFormats) { |
| if (colorPriorities.indexOfKey(supportedColorFormat) >= 0) { |
| int priority = colorPriorities.get(supportedColorFormat); |
| candidateCodecs.put(priority, info.getName()); |
| } |
| } |
| } |
| } |
| |
| // Pick the best codec (with the highest color priority) |
| if (candidateCodecs.isEmpty()) { |
| return null; |
| } else { |
| String bestCodec = candidateCodecs.firstEntry().getValue(); |
| return MediaCodec.createByCodecName(bestCodec); |
| } |
| } |
| |
| private static SparseIntArray intArrayToPriorityMap(int[] values) { |
| SparseIntArray result = new SparseIntArray(); |
| for (int priority = 0; priority < values.length; ++priority) { |
| result.append(values[priority], priority); |
| } |
| return result; |
| } |
| |
| private static void convertImage( |
| ByteBuffer input, ByteBuffer output, int colorFormat, int width, int height) { |
| switch (colorFormat) { |
| case CodecCapabilities.COLOR_Format32bitARGB8888: |
| ColorSpace.convertArgb8888ToRgba8888(input, output, width, height); |
| break; |
| case CodecCapabilities.COLOR_FormatYUV420Planar: |
| ColorSpace.convertYuv420pToRgba8888(input, output, width, height); |
| break; |
| default: |
| throw new RuntimeException("Unsupported color format: " + colorFormat + "!"); |
| } |
| } |
| |
| } |