Examples with ShortBuffer java.nio.ShortBuffer used on opensource projects

Example 96 with ShortBuffer

use of java.nio.ShortBuffer in project ffx by mjschnie.

the class ShortMatrixReductionBuf_1 method receiveItems.

// Hidden operations.
/**
 * {@inheritDoc}
 *
 * Receive as many items as possible from the given byte buffer to this
 * buffer.
 * <P>
 * The <TT>receiveItems()</TT> method must not block the calling thread; if
 * it does, all message I/O in MP will be blocked.
 */
protected int receiveItems(int i, int num, ByteBuffer buffer) {
    ShortBuffer shortbuffer = buffer.asShortBuffer();
    num = Math.min(num, shortbuffer.remaining());
    int n = 0;
    int r = i2r(i);
    int row = r + myLowerRow;
    int c = i2c(i);
    int col = c + myLowerCol;
    int ncols = Math.min(myColCount - c, num);
    while (r < myRowCount && ncols > 0) {
        short[] myMatrix_row = myMatrix[row];
        for (c = 0; c < ncols; ++c) {
            myMatrix_row[col] = myOp.op(myMatrix_row[col], shortbuffer.get());
            ++col;
        }
        num -= ncols;
        n += ncols;
        ++r;
        ++row;
        col = myLowerCol;
        ncols = Math.min(myColCount, num);
    }
    buffer.position(buffer.position() + 2 * n);
    return n;
}

Example 97 with ShortBuffer

use of java.nio.ShortBuffer in project imageio-ext by geosolutions-it.

the class NITFReader method readFullImage.

/**
 * Optimization to read the entire image in one fell swoop... This is most likely the common use case for this codec, so we hope this optimization
 * will be helpful.
 *
 * @param imageIndex
 * @param sourceXSubsampling
 * @param sourceYSubsampling
 * @param bandOffsets
 * @param pixelSize
 * @param imRas
 * @throws IOException
 */
protected void readFullImage(int imageIndex, Rectangle destRegion, int sourceXSubsampling, int sourceYSubsampling, int[] bandOffsets, int pixelSize, WritableRaster imRas) throws IOException {
    try {
        ImageSubheader subheader = record.getImages()[imageIndex].getSubheader();
        int numCols = destRegion.width;
        int numRows = destRegion.height;
        int nBands = subheader.getBandCount();
        /*
             * NOTE: This is a "fix" that will be removed once the underlying NITRO library gets patched. Currently, if you make a request of a single
             * band, it doesn't matter which band you request - the data from the first band will be returned regardless. This is obviously wrong. To
             * thwart this, we will read all bands, then scale down what we return to the user based on their actual request.
             */
        int[] requestBands = bandOffsets;
        /*
             * if (nBands != bandOffsets.length && bandOffsets.length == 1 && bandOffsets[0] != 0) { requestBands = new int[nBands]; for (int i = 0; i
             * < nBands; ++i) requestBands[i] = i; }
             */
        int bufSize = numCols * numRows * pixelSize;
        byte[][] imageBuf = new byte[requestBands.length][bufSize];
        // make a SubWindow from the params
        // TODO may want to read by blocks or rows to make faster and more
        // memory efficient
        SubWindow window;
        window = new SubWindow();
        window.setNumBands(requestBands.length);
        window.setBandList(requestBands);
        window.setNumCols(numCols);
        window.setNumRows(numRows);
        window.setStartCol(0);
        window.setStartRow(0);
        // the NITRO library can do the subsampling for us
        if (sourceYSubsampling != 1 || sourceXSubsampling != 1) {
            DownSampler downSampler = new PixelSkipDownSampler(sourceYSubsampling, sourceXSubsampling);
            window.setDownSampler(downSampler);
        }
        // String pixelJustification = subheader.getPixelJustification()
        // .getStringData().trim();
        // boolean shouldSwap = pixelJustification.equals("R");
        // since this is Java, we need the data in big-endian format
        // boolean shouldSwap = ByteOrder.nativeOrder() !=
        // ByteOrder.BIG_ENDIAN;
        nitf.ImageReader imageReader = getImageReader(imageIndex);
        imageReader.read(window, imageBuf);
        List<ByteBuffer> bandBufs = new ArrayList<ByteBuffer>();
        for (int i = 0; i < bandOffsets.length; ++i) {
            ByteBuffer bandBuf = null;
            // the special "fix" we added needs to do this
            if (bandOffsets.length != requestBands.length) {
                bandBuf = ByteBuffer.wrap(imageBuf[bandOffsets[i]]);
            } else {
                bandBuf = ByteBuffer.wrap(imageBuf[i]);
            }
            // ban dBuf.order(ByteOrder.nativeOrder());
            // shouldSwap ? ByteOrder.LITTLE_ENDIAN
            // : ByteOrder.BIG_ENDIAN);
            bandBufs.add(bandBuf);
        }
        // optimization for 1 band case... just dump the whole thing
        if (bandOffsets.length == 1) {
            ByteBuffer bandBuf = bandBufs.get(0);
            switch(pixelSize) {
                case 1:
                    ByteBuffer rasterByteBuf = ByteBuffer.wrap(((DataBufferByte) imRas.getDataBuffer()).getData());
                    rasterByteBuf.put(bandBuf);
                    break;
                case 2:
                    ShortBuffer rasterShortBuf = ShortBuffer.wrap(((DataBufferUShort) imRas.getDataBuffer()).getData());
                    rasterShortBuf.put(bandBuf.asShortBuffer());
                    break;
                case 4:
                    FloatBuffer rasterFloatBuf = FloatBuffer.wrap(((DataBufferFloat) imRas.getDataBuffer()).getData());
                    rasterFloatBuf.put(bandBuf.asFloatBuffer());
                    break;
                case 8:
                    DoubleBuffer rasterDoubleBuf = DoubleBuffer.wrap(((DataBufferDouble) imRas.getDataBuffer()).getData());
                    rasterDoubleBuf.put(bandBuf.asDoubleBuffer());
                    break;
            }
        } else {
            for (int srcY = 0, srcX = 0; srcY < numRows; srcY++) {
                // Copy each (subsampled) source pixel into imRas
                for (int dstX = 0; dstX < numCols; srcX += pixelSize, dstX++) {
                    for (int i = 0; i < bandOffsets.length; ++i) {
                        ByteBuffer bandBuf = bandBufs.get(i);
                        switch(pixelSize) {
                            case 1:
                                imRas.setSample(dstX, srcY, i, bandBuf.get(srcX));
                                break;
                            case 2:
                                imRas.setSample(dstX, srcY, i, bandBuf.getShort(srcX));
                                break;
                            case 4:
                                imRas.setSample(dstX, srcY, i, bandBuf.getFloat(srcX));
                                break;
                            case 8:
                                imRas.setSample(dstX, srcY, i, bandBuf.getDouble(srcX));
                                break;
                        }
                    }
                }
            }
        }
    } catch (NITFException e1) {
        throw new IOException(e1);
    }
}

Example 98 with ShortBuffer

use of java.nio.ShortBuffer in project imageio-ext by geosolutions-it.

the class JP2KKakaduImageWriter method readSubSampled.

/**
 * Read a region of an input raster and put the data values in the provided
 * Buffer.
 *
 * @param region
 *                the requested region
 * @param originalBounds
 *                the original Image Extent
 * @param lastX
 *                the last pixel to be analyzed along the image width.
 * @param lastY
 *                the last pixel to be analyzed along the image height.
 * @param xSubsamplingFactor
 *                the subsampling factor along the image width.
 * @param ySubsamplingFactor
 *                the subsampling factor along the image height.
 * @param rasterData
 *                the original raster data.
 * @param dataBuffer
 *                the buffer containing the data read.
 * @param nComponents
 *                the number of image components.
 */
private void readSubSampled(final Rectangle region, final Rectangle originalBounds, final int lastX, final int lastY, final int xSubsamplingFactor, final int ySubsamplingFactor, final Raster rasterData, final Buffer dataBuffer, final int nComponents) {
    if (dataBuffer instanceof ByteBuffer) {
        // //
        // 
        // Byte read
        // 
        // //
        final byte[] data = new byte[nComponents];
        final ByteBuffer buffer = (ByteBuffer) dataBuffer;
        for (int j = region.y; j < lastY; j++) {
            if (((j - originalBounds.y) % ySubsamplingFactor) != 0) {
                continue;
            }
            for (int i = region.x; i < lastX; i++) {
                if (((i - originalBounds.x) % xSubsamplingFactor) != 0) {
                    continue;
                }
                rasterData.getDataElements(i, j, data);
                buffer.put(data, 0, nComponents);
            }
        }
    } else if (dataBuffer instanceof ShortBuffer) {
        // //
        // 
        // Short read
        // 
        // //
        final short[] data = new short[nComponents];
        final ShortBuffer buffer = (ShortBuffer) dataBuffer;
        for (int j = region.y; j < lastY; j++) {
            if (((j - originalBounds.y) % ySubsamplingFactor) != 0) {
                continue;
            }
            for (int i = region.x; i < lastX; i++) {
                if (((i - originalBounds.x) % xSubsamplingFactor) != 0) {
                    continue;
                }
                rasterData.getDataElements(i, j, data);
                buffer.put(data, 0, nComponents);
            }
        }
    } else if (dataBuffer instanceof IntBuffer) {
        // //
        // 
        // Int read
        // 
        // //
        final IntBuffer buffer = (IntBuffer) dataBuffer;
        final int[] data = new int[nComponents];
        for (int j = region.y; j < lastY; j++) {
            if (((j - originalBounds.y) % ySubsamplingFactor) != 0) {
                continue;
            }
            for (int i = region.x; i < lastX; i++) {
                if (((i - originalBounds.x) % xSubsamplingFactor) != 0) {
                    continue;
                }
                rasterData.getDataElements(i, j, data);
                buffer.put(data, 0, nComponents);
            }
        }
    } else {
        throw new IllegalArgumentException("Unsupported buffer type");
    }
}

Example 99 with ShortBuffer

use of java.nio.ShortBuffer in project imageio-ext by geosolutions-it.

the class GDALImageReader method readDatasetRaster.

/**
 * Read data from the required region of the raster.
 *
 * @param destSM
 *                sample model for the image
 * @param dataset
 *                GDAL <code>Dataset</code> to read
 * @param srcRegion
 *                the source Region to be read
 * @param dstRegion
 *                the destination Region of the image read
 * @param selectedBands
 *                an array specifying the requested bands
 * @return the read <code>Raster</code>
 */
private Raster readDatasetRaster(SampleModel destSm, Dataset dataset, Rectangle srcRegion, Rectangle dstRegion, int[] selectedBands) throws IOException {
    SampleModel sampleModel = null;
    DataBuffer imgBuffer = null;
    Band pBand = null;
    try {
        int dstWidth = dstRegion.width;
        int dstHeight = dstRegion.height;
        int srcRegionXOffset = srcRegion.x;
        int srcRegionYOffset = srcRegion.y;
        int srcRegionWidth = srcRegion.width;
        int srcRegionHeight = srcRegion.height;
        if (LOGGER.isLoggable(Level.FINE))
            LOGGER.fine("SourceRegion = " + srcRegion.toString());
        // Getting number of bands
        final int nBands = selectedBands != null ? selectedBands.length : destSm.getNumBands();
        int[] banks = new int[nBands];
        int[] offsets = new int[nBands];
        // setting the number of pixels to read
        final int pixels = dstWidth * dstHeight;
        int bufferType = 0, bufferSize = 0;
        int typeSizeInBytes = 0;
        // ////////////////////////////////////////////////////////////////////
        // 
        // -------------------------------------------------------------------
        // Raster Creation >>> Step 2: Data Read
        // -------------------------------------------------------------------
        // 
        // ////////////////////////////////////////////////////////////////////
        // NOTE: Bands are not 0-base indexed, so we must add 1
        pBand = dataset.GetRasterBand(1);
        // setting buffer properties
        bufferType = pBand.getDataType();
        typeSizeInBytes = gdal.GetDataTypeSize(bufferType) / 8;
        bufferSize = nBands * pixels * typeSizeInBytes;
        // splitBands = false -> I read n Bands at once.
        // splitBands = false -> I need to read 1 Band at a time.
        boolean splitBands = false;
        if (bufferSize < 0 || destSm instanceof BandedSampleModel) {
            // The number resulting from the product
            // "numBands*pixels*gdal.GetDataTypeSize(buf_type) / 8"
            // may be negative (A very high number which is not
            // "int representable")
            // In such a case, we will read 1 band at a time.
            bufferSize = pixels * typeSizeInBytes;
            splitBands = true;
        }
        int dataBufferType = -1;
        byte[][] byteBands = new byte[nBands][];
        for (int k = 0; k < nBands; k++) {
            // I quit the loop
            if (k > 0 && !splitBands)
                break;
            final byte[] dataBuffer = new byte[bufferSize];
            final int returnVal;
            if (!splitBands) {
                // I can read nBands at once.
                final int[] bandsMap = new int[nBands];
                if (selectedBands != null) {
                    for (int i = 0; i < nBands; i++) bandsMap[i] = selectedBands[i] + 1;
                } else {
                    for (int i = 0; i < nBands; i++) bandsMap[i] = i + 1;
                }
                returnVal = dataset.ReadRaster(srcRegionXOffset, srcRegionYOffset, srcRegionWidth, srcRegionHeight, dstWidth, dstHeight, bufferType, dataBuffer, bandsMap, nBands * typeSizeInBytes, dstWidth * nBands * typeSizeInBytes, typeSizeInBytes);
                byteBands[k] = dataBuffer;
            } else {
                // I need to read 1 band at a time.
                Band rBand = null;
                try {
                    rBand = dataset.GetRasterBand(k + 1);
                    returnVal = rBand.ReadRaster(srcRegionXOffset, srcRegionYOffset, srcRegionWidth, srcRegionHeight, dstWidth, dstHeight, bufferType, dataBuffer);
                    byteBands[k] = dataBuffer;
                } finally {
                    if (rBand != null) {
                        try {
                            // Closing the band
                            rBand.delete();
                        } catch (Throwable e) {
                            if (LOGGER.isLoggable(Level.FINEST))
                                LOGGER.log(Level.FINEST, e.getLocalizedMessage(), e);
                        }
                    }
                }
            }
            if (returnVal == gdalconstConstants.CE_None) {
                if (!splitBands)
                    for (int band = 0; band < nBands; band++) {
                        banks[band] = band;
                        offsets[band] = band;
                    }
                else {
                    banks[k] = k;
                    offsets[k] = 0;
                }
            } else {
                // The read operation was not successfully computed.
                // Showing error messages.
                LOGGER.info(new StringBuilder("Last error: ").append(gdal.GetLastErrorMsg()).toString());
                LOGGER.info(new StringBuilder("Last error number: ").append(gdal.GetLastErrorNo()).toString());
                LOGGER.info(new StringBuilder("Last error type: ").append(gdal.GetLastErrorType()).toString());
                throw new RuntimeException(gdal.GetLastErrorMsg());
            }
        }
        // /////////////////////////////////////////////////////////////////////
        if (bufferType == gdalconstConstants.GDT_Byte) {
            if (!splitBands) {
                // final byte[] bytes = new byte[nBands * pixels];
                // bands[0].get(bytes, 0, nBands * pixels);
                imgBuffer = new DataBufferByte(byteBands[0], nBands * pixels);
            } else {
                // final byte[][] bytes = new byte[nBands][];
                // for (int i = 0; i < nBands; i++) {
                // //                    bytes[i] = new byte[pixels];
                // bands[i].get(bytes[i], 0, pixels);
                // }
                imgBuffer = new DataBufferByte(byteBands, pixels);
            }
            dataBufferType = DataBuffer.TYPE_BYTE;
        } else {
            ByteBuffer[] bands = new ByteBuffer[nBands];
            for (int k = 0; (splitBands && k < nBands) || (k < 1 && !splitBands); k++) {
                bands[k] = ByteBuffer.wrap(byteBands[k], 0, byteBands[k].length);
            }
            if (bufferType == gdalconstConstants.GDT_Int16 || bufferType == gdalconstConstants.GDT_UInt16) {
                if (!splitBands) {
                    // I get short values from the ByteBuffer using a view
                    // of the ByteBuffer as a ShortBuffer
                    // It is worth to create the view outside the loop.
                    short[] shorts = new short[nBands * pixels];
                    bands[0].order(ByteOrder.nativeOrder());
                    final ShortBuffer buff = bands[0].asShortBuffer();
                    buff.get(shorts, 0, nBands * pixels);
                    if (bufferType == gdalconstConstants.GDT_Int16)
                        imgBuffer = new DataBufferShort(shorts, nBands * pixels);
                    else
                        imgBuffer = new DataBufferUShort(shorts, nBands * pixels);
                } else {
                    short[][] shorts = new short[nBands][];
                    for (int i = 0; i < nBands; i++) {
                        shorts[i] = new short[pixels];
                        bands[i].order(ByteOrder.nativeOrder());
                        bands[i].asShortBuffer().get(shorts[i], 0, pixels);
                    }
                    if (bufferType == gdalconstConstants.GDT_Int16)
                        imgBuffer = new DataBufferShort(shorts, pixels);
                    else
                        imgBuffer = new DataBufferUShort(shorts, pixels);
                }
                if (bufferType == gdalconstConstants.GDT_UInt16)
                    dataBufferType = DataBuffer.TYPE_USHORT;
                else
                    dataBufferType = DataBuffer.TYPE_SHORT;
            } else if (bufferType == gdalconstConstants.GDT_Int32 || bufferType == gdalconstConstants.GDT_UInt32) {
                if (!splitBands) {
                    // I get int values from the ByteBuffer using a view
                    // of the ByteBuffer as an IntBuffer
                    // It is worth to create the view outside the loop.
                    int[] ints = new int[nBands * pixels];
                    bands[0].order(ByteOrder.nativeOrder());
                    final IntBuffer buff = bands[0].asIntBuffer();
                    buff.get(ints, 0, nBands * pixels);
                    imgBuffer = new DataBufferInt(ints, nBands * pixels);
                } else {
                    int[][] ints = new int[nBands][];
                    for (int i = 0; i < nBands; i++) {
                        ints[i] = new int[pixels];
                        bands[i].order(ByteOrder.nativeOrder());
                        bands[i].asIntBuffer().get(ints[i], 0, pixels);
                    }
                    imgBuffer = new DataBufferInt(ints, pixels);
                }
                dataBufferType = DataBuffer.TYPE_INT;
            } else if (bufferType == gdalconstConstants.GDT_Float32) {
                if (!splitBands) {
                    // I get float values from the ByteBuffer using a view
                    // of the ByteBuffer as a FloatBuffer
                    // It is worth to create the view outside the loop.
                    float[] floats = new float[nBands * pixels];
                    bands[0].order(ByteOrder.nativeOrder());
                    final FloatBuffer buff = bands[0].asFloatBuffer();
                    buff.get(floats, 0, nBands * pixels);
                    imgBuffer = new DataBufferFloat(floats, nBands * pixels);
                } else {
                    float[][] floats = new float[nBands][];
                    for (int i = 0; i < nBands; i++) {
                        floats[i] = new float[pixels];
                        bands[i].order(ByteOrder.nativeOrder());
                        bands[i].asFloatBuffer().get(floats[i], 0, pixels);
                    }
                    imgBuffer = new DataBufferFloat(floats, pixels);
                }
                dataBufferType = DataBuffer.TYPE_FLOAT;
            } else if (bufferType == gdalconstConstants.GDT_Float64) {
                if (!splitBands) {
                    // I get double values from the ByteBuffer using a view
                    // of the ByteBuffer as a DoubleBuffer
                    // It is worth to create the view outside the loop.
                    double[] doubles = new double[nBands * pixels];
                    bands[0].order(ByteOrder.nativeOrder());
                    final DoubleBuffer buff = bands[0].asDoubleBuffer();
                    buff.get(doubles, 0, nBands * pixels);
                    imgBuffer = new DataBufferDouble(doubles, nBands * pixels);
                } else {
                    double[][] doubles = new double[nBands][];
                    for (int i = 0; i < nBands; i++) {
                        doubles[i] = new double[pixels];
                        bands[i].order(ByteOrder.nativeOrder());
                        bands[i].asDoubleBuffer().get(doubles[i], 0, pixels);
                    }
                    imgBuffer = new DataBufferDouble(doubles, pixels);
                }
                dataBufferType = DataBuffer.TYPE_DOUBLE;
            } else {
                // TODO: Handle more cases if needed. Show the name of the type
                // instead of the numeric value.
                LOGGER.info("The specified data type is actually unsupported: " + bufferType);
            }
        }
        // TODO: Fix this in compliance with the specified destSampleModel
        if (splitBands)
            sampleModel = new BandedSampleModel(dataBufferType, dstWidth, dstHeight, dstWidth, banks, offsets);
        else
            sampleModel = new PixelInterleavedSampleModel(dataBufferType, dstWidth, dstHeight, nBands, dstWidth * nBands, offsets);
    } finally {
        if (pBand != null) {
            try {
                // Closing the band
                pBand.delete();
            } catch (Throwable e) {
                if (LOGGER.isLoggable(Level.FINE))
                    LOGGER.log(Level.FINE, e.getLocalizedMessage(), e);
            }
        }
    }
    // dstRegion.x, dstRegion.y));
    return Raster.createWritableRaster(sampleModel, imgBuffer, null);
}

Example 100 with ShortBuffer

use of java.nio.ShortBuffer in project VideoRecorder by qdrzwd.

the class NewFFmpegFrameRecorder method record.

@Override
public boolean record(int sampleRate, Buffer... samples) throws Exception {
    if (audioSt == null) {
        throw new Exception("No audio output stream (Is audioChannels > 0 and has start() been called?)");
    }
    int inputSize = samples[0].limit() - samples[0].position();
    int inputDepth;
    if (sampleRate <= 0) {
        sampleRate = audioC.sample_rate();
    }
    int inputFormat;
    if (samples[0] instanceof ByteBuffer) {
        inputFormat = samples.length > 1 ? AV_SAMPLE_FMT_U8P : AV_SAMPLE_FMT_U8;
        inputDepth = 1;
        for (int i = 0; i < samples.length; i++) {
            ByteBuffer b = (ByteBuffer) samples[i];
            if (samplesIn[i] instanceof BytePointer && samplesIn[i].capacity() >= inputSize && b.hasArray()) {
                ((BytePointer) samplesIn[i]).position(0).put(b.array(), b.position(), inputSize);
            } else {
                samplesIn[i] = new BytePointer(b);
            }
        }
    } else if (samples[0] instanceof ShortBuffer) {
        inputFormat = samples.length > 1 ? AV_SAMPLE_FMT_S16P : AV_SAMPLE_FMT_S16;
        inputDepth = 2;
        for (int i = 0; i < samples.length; i++) {
            ShortBuffer b = (ShortBuffer) samples[i];
            if (samplesIn[i] instanceof ShortPointer && samplesIn[i].capacity() >= inputSize && b.hasArray()) {
                ((ShortPointer) samplesIn[i]).position(0).put(b.array(), samples[i].position(), inputSize);
            } else {
                samplesIn[i] = new ShortPointer(b);
            }
        }
    } else if (samples[0] instanceof IntBuffer) {
        inputFormat = samples.length > 1 ? AV_SAMPLE_FMT_S32P : AV_SAMPLE_FMT_S32;
        inputDepth = 4;
        for (int i = 0; i < samples.length; i++) {
            IntBuffer b = (IntBuffer) samples[i];
            if (samplesIn[i] instanceof IntPointer && samplesIn[i].capacity() >= inputSize && b.hasArray()) {
                ((IntPointer) samplesIn[i]).position(0).put(b.array(), samples[i].position(), inputSize);
            } else {
                samplesIn[i] = new IntPointer(b);
            }
        }
    } else if (samples[0] instanceof FloatBuffer) {
        inputFormat = samples.length > 1 ? AV_SAMPLE_FMT_FLTP : AV_SAMPLE_FMT_FLT;
        inputDepth = 4;
        for (int i = 0; i < samples.length; i++) {
            FloatBuffer b = (FloatBuffer) samples[i];
            if (samplesIn[i] instanceof FloatPointer && samplesIn[i].capacity() >= inputSize && b.hasArray()) {
                ((FloatPointer) samplesIn[i]).position(0).put(b.array(), b.position(), inputSize);
            } else {
                samplesIn[i] = new FloatPointer(b);
            }
        }
    } else if (samples[0] instanceof DoubleBuffer) {
        inputFormat = samples.length > 1 ? AV_SAMPLE_FMT_DBLP : AV_SAMPLE_FMT_DBL;
        inputDepth = 8;
        for (int i = 0; i < samples.length; i++) {
            DoubleBuffer b = (DoubleBuffer) samples[i];
            if (samplesIn[i] instanceof DoublePointer && samplesIn[i].capacity() >= inputSize && b.hasArray()) {
                ((DoublePointer) samplesIn[i]).position(0).put(b.array(), b.position(), inputSize);
            } else {
                samplesIn[i] = new DoublePointer(b);
            }
        }
    } else {
        throw new Exception("Audio samples Buffer has unsupported type: " + samples);
    }
    int ret;
    int outputFormat = audioC.sample_fmt();
    if (samplesConvertCtx == null) {
        samplesConvertCtx = swr_alloc_set_opts(null, audioC.channel_layout(), outputFormat, audioC.sample_rate(), audioC.channel_layout(), inputFormat, sampleRate, 0, null);
        if (samplesConvertCtx == null) {
            throw new Exception("swr_alloc_set_opts() error: Cannot allocate the conversion context.");
        } else if ((ret = swr_init(samplesConvertCtx)) < 0) {
            throw new Exception("swr_init() error " + ret + ": Cannot initialize the conversion context.");
        }
    }
    for (int i = 0; i < samples.length; i++) {
        samplesIn[i].position(samplesIn[i].position() * inputDepth).limit((samplesIn[i].position() + inputSize) * inputDepth);
    }
    int outputChannels = samplesOut.length > 1 ? 1 : audioChannels;
    int outputDepth = av_get_bytes_per_sample(outputFormat);
    int inputChannels = samples.length > 1 ? 1 : audioChannels;
    while (true) {
        int inputCount = (samplesIn[0].limit() - samplesIn[0].position()) / (inputChannels * inputDepth);
        int outputCount = (samplesOut[0].limit() - samplesOut[0].position()) / (outputChannels * outputDepth);
        inputCount = Math.min(inputCount, 2 * (outputCount * sampleRate) / audioC.sample_rate());
        for (int i = 0; i < samples.length; i++) {
            samplesInPtr.put(i, samplesIn[i]);
        }
        for (int i = 0; i < samplesOut.length; i++) {
            samplesOutPtr.put(i, samplesOut[i]);
        }
        if ((ret = swr_convert(samplesConvertCtx, samplesOutPtr, outputCount, samplesInPtr, inputCount)) < 0) {
            throw new Exception("swr_convert() error " + ret + ": Cannot convert audio samples.");
        } else if (ret == 0) {
            break;
        }
        for (int i = 0; i < samples.length; i++) {
            samplesIn[i].position(samplesIn[i].position() + inputCount * inputChannels * inputDepth);
        }
        for (int i = 0; i < samplesOut.length; i++) {
            samplesOut[i].position(samplesOut[i].position() + ret * outputChannels * outputDepth);
        }
        if (samplesOut[0].position() >= samplesOut[0].limit()) {
            frame.nb_samples(audioInputFrameSize);
            avcodec_fill_audio_frame(frame, audioC.channels(), outputFormat, samplesOut[0], samplesOut[0].limit(), 0);
            for (int i = 0; i < samplesOut.length; i++) {
                frame.data(i, samplesOut[i].position(0));
                frame.linesize(i, samplesOut[i].limit());
            }
            frame.quality(audioC.global_quality());
            record(frame);
        }
    }
    return frame.key_frame() != 0;
}