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#ifndef IMAGE_IO_JPEG_JPEG_IMAGE_EXTRACTOR_H_ // NOLINT
#define IMAGE_IO_JPEG_JPEG_IMAGE_EXTRACTOR_H_ // NOLINT
#include "image_io/base/data_destination.h"
#include "image_io/base/data_source.h"
#include "image_io/base/message_handler.h"
#include "image_io/jpeg/jpeg_info.h"
namespace photos_editing_formats {
namespace image_io {
/// A class that can make use of the data in a JpegInfo instance to transfer
/// Apple depth and GDepth/GImage images from a DataSource and ship it to a
/// DataDestination.
class JpegImageExtractor {
public:
/// @param jpeg_info The JpegInfo instance containing depth/image data.
/// @param data_source The DataSource from which to transfer depth/image data.
/// @param message_handler An optional message handler to write messages to.
JpegImageExtractor(const JpegInfo& jpeg_info, DataSource* data_source,
MessageHandler* message_handler)
: jpeg_info_(jpeg_info),
data_source_(data_source),
message_handler_(message_handler) {}
/// This function extracts the Apple depth image from the DataSource and sends
/// the bytes to the DataDestination.
/// @param image_destination The DataDestination to receive the image data.
/// @return True if an image was extracted.
bool ExtractAppleDepthImage(DataDestination* image_destination);
/// This function extracts the Apple matte image from the DataSource and sends
/// the bytes to the DataDestination.
/// @param image_destination The DataDestination to receive the image data.
/// @return True if an image was extracted.
bool ExtractAppleMatteImage(DataDestination* image_destination);
/// This function extracts the GDepth type image from the DataSource and
/// sends the bytes to the DataDestination.
/// @param image_destination The DataDestination to receive the image data.
/// @return True if an image was extracted.
bool ExtractGDepthImage(DataDestination* image_destination);
/// This function extracts the GImage type image from the DataSource and
/// sends the bytes to the DataDestination.
/// @param image_destination The DataDestination to receive the image data.
/// @return True if an image was extracted.
bool ExtractGImageImage(DataDestination* image_destination);
private:
/// Worker function called for GDepth/GImage type image extraction.
/// @param xmp_info_type The type of image to extract.
/// @param image_destination The DataDestination to receive the image data.
/// @return True if an image was extracted.
bool ExtractImage(JpegXmpInfo::Type xmp_info_type,
DataDestination* image_destination);
/// Worker function called for Apple depth/matte type image extraction.
/// @param image_range The range of the image data to extract. If invalid,
/// the image_destination's StartTransfer/FinishTransfer functions are
/// still called, and this function will return true (i.e., zero bytes
/// "successfully" transferred).
/// @param image_destination The DataDestination to receive the image data.
/// @return True if the transfer succeeded.
bool ExtractImage(const DataRange& image_range,
DataDestination* image_destination);
/// The jpeg info object contains the location of the Apple and Google images.
JpegInfo jpeg_info_;
/// The data source from which the images are extracted.
DataSource* data_source_;
/// An optional message handler to write messages to.
MessageHandler* message_handler_;
};
} // namespace image_io
} // namespace photos_editing_formats
#endif // IMAGE_IO_JPEG_JPEG_IMAGE_EXTRACTOR_H_ // NOLINT
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