Java BufferFlag类代码示例

import org.monte.media.BufferFlag; //导入依赖的package包/类
@Override
public int process(Buffer in, Buffer out) {
    if (state == null) {
        state = new TechSmithCodecCore();
    }
    if (in.isFlag(BufferFlag.DISCARD)) {
        out.setMetaTo(in);
        return CODEC_OK;
    }
    
    if (outputFormat.get(EncodingKey).equals(ENCODING_AVI_TECHSMITH_SCREEN_CAPTURE)) {
        return encode(in, out);
    } else {
        return decode(in, out);
    }
}
 

import org.monte.media.BufferFlag; //导入依赖的package包/类
/**
 * The actual writing of the buffer happens here. <p> This method is called
 * exclusively from the writer thread in startWriter().
 *
 * @param buf
 * @throws java.io.IOException
 */
private void doWrite(Buffer buf) throws IOException {
    MovieWriter mw = w;
    // Close file on a separate thread if file is full or an hour
    // has passed.
    // The if-statement must ensure that we only start a new video file
    // at a key-frame.
    // FIXME - this assumes that all audio frames are key-frames
    // FIXME - this does not guarantee that audio and video track have
    //         the same duration
    long now = System.currentTimeMillis();
    if (buf.track == videoTrack && buf.isFlag(BufferFlag.KEYFRAME)
            && (mw.isDataLimitReached() || now - fileStartTime > maxRecordingTime)) {
        final MovieWriter closingWriter = mw;
        new Thread() {
            @Override
            public void run() {
                try {
                    closingWriter.close();
                } catch (IOException ex) {
                    ex.printStackTrace();
                }

            }
        }.start();
        mw = createMovieWriter();

    }
    //}
    mw.write(buf.track, buf);
}
 

import org.monte.media.BufferFlag; //导入依赖的package包/类
private static BufferedImage[] readMovie(File file) throws IOException {
    ArrayList<BufferedImage> frames=new ArrayList<BufferedImage> ();
    
    MovieReader in = Registry.getInstance().getReader(file);

    Format format = new Format(DataClassKey, BufferedImage.class);

    int track=in.findTrack(0,new Format(MediaTypeKey,MediaType.VIDEO));
    Codec codec=Registry.getInstance().getCodec(in.getFormat(track), format);

    try {
        Buffer inbuf = new Buffer();
        Buffer codecbuf = new Buffer();
        do {
            in.read(track, inbuf);
            codec.process(inbuf, codecbuf);
            if (!codecbuf.isFlag(BufferFlag.DISCARD)) {
                frames.add(Images.cloneImage((BufferedImage)codecbuf.data));
            }
            
        } while (!inbuf.isFlag(BufferFlag.END_OF_MEDIA));
    } finally {
        in.close();
    }
    
    return frames.toArray(new BufferedImage[frames.size()]);
}
 

import org.monte.media.BufferFlag; //导入依赖的package包/类
/**
 * The actual writing of the buffer happens here. <p> This method is called
 * exclusively from the writer thread in startWriter().
 *
 * @param buf
 * @throws IOException
 */
private void doWrite(Buffer buf) throws IOException {
    MovieWriter mw = w;
    // Close file on a separate thread if file is full or an hour
    // has passed.
    // The if-statement must ensure that we only start a new video file
    // at a key-frame.
    // FIXME - this assumes that all audio frames are key-frames
    // FIXME - this does not guarantee that audio and video track have
    //         the same duration
    long now = System.currentTimeMillis();
    if (buf.track == videoTrack && buf.isFlag(BufferFlag.KEYFRAME)
            && (mw.isDataLimitReached() || now - fileStartTime > maxRecordingTime)) {
        final MovieWriter closingWriter = mw;
        new Thread() {
            @Override
            public void run() {
                try {
                    closingWriter.close();
                } catch (IOException ex) {
                    ex.printStackTrace();
                }

            }
        }.start();
        mw = createMovieWriter();

    }
    //}
    mw.write(buf.track, buf);
}
 

import org.monte.media.BufferFlag; //导入依赖的package包/类
/**
 * Encodes the provided image and writes its sample data into the specified
 * track.
 *
 * @param track The track index.
 * @param image The image of the video frame.
 * @param duration Duration given in media time units.
 *
 * @throws IndexOutofBoundsException if the track index is out of bounds.
 * @throws if the duration is less than 1, or if the dimension of the frame
 * does not match the dimension of the video.
 * @throws UnsupportedOperationException if the {@code MovieWriter} does not
 * have a built-in encoder for this video format.
 * @throws java.io.IOException if writing the sample data failed.
 */
public void write(int track, BufferedImage image, long duration) throws IOException {
    ensureStarted();

    VideoTrack vt = (VideoTrack) tracks.get(track);
    if (vt.codec == null) {
        createCodec(track);
    }
    if (vt.codec == null) {
        throw new UnsupportedOperationException("No codec for this format: " + vt.format);
    }

    // The dimension of the image must match the dimension of the video track
    Format fmt = vt.format;
    if (fmt.get(WidthKey) != image.getWidth() || fmt.get(HeightKey) != image.getHeight()) {
        throw new IllegalArgumentException("Dimensions of image[" + vt.samples.size()
                + "] (width=" + image.getWidth() + ", height=" + image.getHeight()
                + ") differs from video format of track: " + fmt);
    }

    // Encode pixel data
    {
        if (vt.outputBuffer == null) {
            vt.outputBuffer = new Buffer();
        }

        boolean isKeyframe = vt.syncInterval == 0 ? false : vt.samples.size() % vt.syncInterval == 0;

        Buffer inputBuffer = new Buffer();
        inputBuffer.flags = (isKeyframe) ? EnumSet.of(KEYFRAME) : EnumSet.noneOf(BufferFlag.class);
        inputBuffer.data = image;
        vt.codec.process(inputBuffer, vt.outputBuffer);
        if (vt.outputBuffer.flags.contains(DISCARD)) {
            return;
        }

        // Encode palette data
        isKeyframe = vt.outputBuffer.flags.contains(KEYFRAME);
        boolean paletteChange = writePalette(track, image, isKeyframe);
        writeSample(track, (byte[]) vt.outputBuffer.data, vt.outputBuffer.offset, vt.outputBuffer.length, isKeyframe && !paletteChange);
        /*
         long offset = getRelativeStreamPosition();

         DataChunk videoFrameChunk = new DataChunk(vt.getSampleChunkFourCC(isKeyframe));
         moviChunk.add(videoFrameChunk);
         videoFrameChunk.getOutputStream().write((byte[]) vt.outputBuffer.data, vt.outputBuffer.offset, vt.outputBuffer.length);
         videoFrameChunk.finish();
         long length = getRelativeStreamPosition() - offset;

         Sample s=new Sample(videoFrameChunk.chunkType, 1, offset, length, isKeyframe&&!paletteChange);
         vt.addSample(s);
         idx1.add(s);
        
         if (getRelativeStreamPosition() > 1L << 32) {
         throw new IOException("AVI file is larger than 4 GB");
         }*/
    }
}
 

import org.monte.media.BufferFlag; //导入依赖的package包/类
/**
 * Encodes the provided image and writes its sample data into the specified
 * track.
 *
 * @param track The track index.
 * @param image The image of the video frame.
 * @param duration Duration given in media time units.
 *
 * @throws IndexOutofBoundsException if the track index is out of bounds.
 * @throws if the duration is less than 1, or if the dimension of the frame
 * does not match the dimension of the video.
 * @throws UnsupportedOperationException if the {@code MovieWriter} does not
 * have a built-in encoder for this video format.
 * @throws IOException if writing the sample data failed.
 */
public void write(int track, BufferedImage image, long duration) throws IOException {
    ensureStarted();

    VideoTrack vt = (VideoTrack) tracks.get(track);
    if (vt.codec == null) {
        createCodec(track);
    }
    if (vt.codec == null) {
        throw new UnsupportedOperationException("No codec for this format: " + vt.format);
    }

    // The dimension of the image must match the dimension of the video track
    Format fmt = vt.format;
    if (fmt.get(WidthKey) != image.getWidth() || fmt.get(HeightKey) != image.getHeight()) {
        throw new IllegalArgumentException("Dimensions of image[" + vt.samples.size()
                + "] (width=" + image.getWidth() + ", height=" + image.getHeight()
                + ") differs from video format of track: " + fmt);
    }

    // Encode pixel data
    {
        if (vt.outputBuffer == null) {
            vt.outputBuffer = new Buffer();
        }

        boolean isKeyframe = vt.syncInterval == 0 ? false : vt.samples.size() % vt.syncInterval == 0;

        Buffer inputBuffer = new Buffer();
        inputBuffer.flags = (isKeyframe) ? EnumSet.of(KEYFRAME) : EnumSet.noneOf(BufferFlag.class);
        inputBuffer.data = image;
        vt.codec.process(inputBuffer, vt.outputBuffer);
        if (vt.outputBuffer.flags.contains(DISCARD)) {
            return;
        }

        // Encode palette data
        isKeyframe = vt.outputBuffer.flags.contains(KEYFRAME);
        boolean paletteChange = writePalette(track, image, isKeyframe);
        writeSample(track, (byte[]) vt.outputBuffer.data, vt.outputBuffer.offset, vt.outputBuffer.length, isKeyframe && !paletteChange);
        /*
         long offset = getRelativeStreamPosition();

         DataChunk videoFrameChunk = new DataChunk(vt.getSampleChunkFourCC(isKeyframe));
         moviChunk.add(videoFrameChunk);
         videoFrameChunk.getOutputStream().write((byte[]) vt.outputBuffer.data, vt.outputBuffer.offset, vt.outputBuffer.length);
         videoFrameChunk.finish();
         long length = getRelativeStreamPosition() - offset;

         Sample s=new Sample(videoFrameChunk.chunkType, 1, offset, length, isKeyframe&&!paletteChange);
         vt.addSample(s);
         idx1.add(s);
        
         if (getRelativeStreamPosition() > 1L << 32) {
         throw new IOException("AVI file is larger than 4 GB");
         }*/
    }
}