void
MPEGCodec::decompress(const DataChunk &data)
{
const int channels = 3;
const size_t bytes_per_channel = sizeof(unsigned char);
const UInt32 width = _descriptor.getStoredWidth();
const UInt32 height = _descriptor.getStoredHeight();
const ptrdiff_t stride = bytes_per_channel * channels;
const size_t rowbytes = width * stride;
const size_t data_size = rowbytes * height;
DataChunkPtr buf_data = new DataChunk(data_size);
char *data_origin = (char *)buf_data->Data;
FrameBufferPtr buf = new FrameBuffer(width, height);
buf->insert("R", Slice(MoxFiles::UINT8, data_origin + (bytes_per_channel * 0), stride, rowbytes));
buf->insert("G", Slice(MoxFiles::UINT8, data_origin + (bytes_per_channel * 1), stride, rowbytes));
buf->insert("B", Slice(MoxFiles::UINT8, data_origin + (bytes_per_channel * 2), stride, rowbytes));
memset(data_origin, 0, data_size);
buf->attachData(buf_data);
storeFrame(buf);
}
void
JPEGLSCodec::decompress(const DataChunk &data)
{
ByteStreamInfo inStream = FromByteArray(data.Data, data.Size);
struct JlsParameters info;
JLS_ERROR err = JpegLsReadHeaderStream(inStream, &info);
if(err == OK)
{
const int width = info.width;
const int height = info.height;
assert(info.components == (_channels == JPEGLS_RGBA ? 4 : 3));
assert(info.colorTransform == COLORXFORM_NONE);
const PixelType pixType = (_depth == JPEGLS_8 ? UINT8 :
_depth == JPEGLS_10 ? UINT10 :
_depth == JPEGLS_12 ? UINT12 :
_depth == JPEGLS_16 ? UINT16 :
UINT8);
const size_t pixSize = PixelSize(pixType);
const unsigned int bitDepth = PixelBits(pixType);
assert(info.bitspersample == bitDepth);
const size_t pixelSize = (info.components * PixelSize(pixType));
const size_t rowBytes = (width * pixelSize);
const size_t bufSize = (height * rowBytes);
DataChunkPtr frameData = new DataChunk(bufSize);
char *buf = (char *)frameData->Data;
const Box2i dataW = dataWindow();
assert(width == (dataW.max.x - dataW.min.x + 1));
assert(height == (dataW.max.y - dataW.min.y + 1));
assert(dataW.min.x == 0);
assert(dataW.min.y == 0);
FrameBufferPtr frameBuffer = new FrameBuffer(dataW);
frameBuffer->insert("R", Slice(pixType, &buf[0 * pixSize], pixelSize, rowBytes));
frameBuffer->insert("G", Slice(pixType, &buf[1 * pixSize], pixelSize, rowBytes));
frameBuffer->insert("B", Slice(pixType, &buf[2 * pixSize], pixelSize, rowBytes));
if(info.components >= 4)
frameBuffer->insert("A", Slice(pixType, &buf[3 * pixSize], pixelSize, rowBytes));
frameBuffer->attachData(frameData);
ByteStreamInfo outStream = FromByteArray(frameData->Data, frameData->Size);
err = JpegLsDecodeStream(outStream, inStream, &info);
if(err == OK)
{
storeFrame(frameBuffer);
}
}
if(err != OK)
throw MoxMxf::ArgExc("JPEG-LS decompression error");
}
void
JPEGCodec::decompress(const DataChunk &data)
{
struct jpeg_error_mgr jerr;
jerr.error_exit = my_error_exit;
jerr.emit_message = my_emit_message;
jerr.output_message = my_output_message;
jerr.format_message = my_format_message;
jerr.reset_error_mgr = my_reset_error_mgr;
jerr.trace_level = 0;
jerr.num_warnings = 0;
jerr.msg_code = 0;
jerr.jpeg_message_table = jpeg_std_message_table;
jerr.last_jpeg_message = (int) JMSG_LASTMSGCODE - 1;
jerr.addon_message_table = NULL;
jerr.first_addon_message = 0;
jerr.last_jpeg_message = 0;
my_source_mgr mgr;
mgr.infile = new MemoryFile(data);
mgr.buffer = (JOCTET *)malloc(4096 * sizeof(JOCTET));
mgr.bufferSize = 4096;
mgr.pub.bytes_in_buffer = 0;
mgr.pub.next_input_byte = NULL;
if(mgr.buffer == NULL)
throw MoxMxf::NullExc("out of memory");
mgr.pub.init_source = my_init_source;
mgr.pub.fill_input_buffer = my_fill_input_buffer;
mgr.pub.skip_input_data = my_skip_input_data;
mgr.pub.resync_to_restart = jpeg_resync_to_restart;
mgr.pub.term_source = my_term_source;
struct jpeg_decompress_struct cinfo;
cinfo.err = &jerr;
jpeg_create_decompress(&cinfo);
cinfo.src = (jpeg_source_mgr *)&mgr;
bool success = true;
try
{
const int status = jpeg_read_header(&cinfo, TRUE);
if(status == JPEG_HEADER_OK)
{
jpeg_start_decompress(&cinfo);
const JDIMENSION width = cinfo.image_width;
const JDIMENSION height = cinfo.image_height;
assert(cinfo.num_components == 3);
assert(cinfo.out_color_space == JCS_RGB);
const size_t pixelSize = (3 * PixelSize(UINT8));
const size_t rowBytes = (width * pixelSize);
const size_t bufSize = (height * rowBytes);
DataChunkPtr frameData = new DataChunk(bufSize);
char *buf = (char *)frameData->Data;
const Box2i dataW = dataWindow();
assert(width == (dataW.max.x - dataW.min.x + 1));
assert(height == (dataW.max.y - dataW.min.y + 1));
assert(dataW.min.x == 0);
assert(dataW.min.y == 0);
FrameBufferPtr frameBuffer = new FrameBuffer(dataW);
frameBuffer->insert("R", Slice(UINT8, &buf[0], pixelSize, rowBytes));
frameBuffer->insert("G", Slice(UINT8, &buf[1], pixelSize, rowBytes));
frameBuffer->insert("B", Slice(UINT8, &buf[2], pixelSize, rowBytes));
frameBuffer->attachData(frameData);
JSAMPARRAY scanlines = (JSAMPARRAY)malloc(height * sizeof(JSAMPROW));
if(scanlines == NULL)
throw MoxMxf::NullExc("out of memory");
for(int y=0; y < height; y++)
{
scanlines[y] = (JSAMPROW)(buf + (y * rowBytes));
}
JDIMENSION linesRead = 0;
while(linesRead < height)
{
linesRead += jpeg_read_scanlines(&cinfo, &scanlines[linesRead], height - linesRead);
}
free(scanlines);
jpeg_finish_decompress(&cinfo);
storeFrame(frameBuffer);
}
else
throw MoxMxf::ArgExc("Error reading header");
}
catch(...)
{
success = false;
}
jpeg_destroy_decompress(&cinfo);
free(mgr.buffer);
delete mgr.infile;
if(!success)
throw MoxMxf::ArgExc("JPEG decompression error");
}