1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
#include "image_io/jpeg/jpeg_image_extractor.h"
#include <sstream>
#include "image_io/base/data_range_tracking_destination.h"
#include "image_io/base/message_handler.h"
#include "image_io/extras/base64_decoder_data_destination.h"
#include "image_io/jpeg/jpeg_segment.h"
#include "image_io/jpeg/jpeg_xmp_data_extractor.h"
/// Set this macro to 1 for debug output.
#define PHOTOS_EDITING_FORMATS_IMAGE_IO_JPEG_JPEG_IMAGE_EXTRACTOR_DEBUG 0
namespace photos_editing_formats {
namespace image_io {
using std::vector;
namespace {
/// The optimim size to use for the DataSource::TransferData() function.
constexpr size_t kBestDataSize = 0x10000;
} // namespace
bool JpegImageExtractor::ExtractAppleDepthImage(
DataDestination* image_destination) {
bool succeeded =
ExtractImage(jpeg_info_.GetAppleDepthImageRange(), image_destination);
return jpeg_info_.HasAppleDepth() && succeeded;
}
bool JpegImageExtractor::ExtractAppleMatteImage(
DataDestination* image_destination) {
bool succeeded =
ExtractImage(jpeg_info_.GetAppleMatteImageRange(), image_destination);
return jpeg_info_.HasAppleMatte() && succeeded;
}
bool JpegImageExtractor::ExtractImage(const DataRange& image_range,
DataDestination* image_destination) {
DataRangeTrackingDestination data_range_destination(image_destination);
bool has_errors = false;
data_range_destination.StartTransfer();
if (image_range.IsValid()) {
DataSource::TransferDataResult result = data_source_->TransferData(
image_range, kBestDataSize, &data_range_destination);
if (result == DataSource::kTransferDataError) {
has_errors = true;
} else if (result == DataSource::kTransferDataNone ||
data_range_destination.HasDisjointTransferRanges() ||
data_range_destination.GetTrackedDataRange() != image_range) {
has_errors = true;
MessageHandler::Get()->ReportMessage(Message::kPrematureEndOfDataError,
"");
}
}
data_range_destination.FinishTransfer();
return !has_errors;
}
bool JpegImageExtractor::ExtractGDepthImage(
DataDestination* image_destination) {
return ExtractImage(JpegXmpInfo::kGDepthInfoType, image_destination);
}
bool JpegImageExtractor::ExtractGImageImage(
DataDestination* image_destination) {
return ExtractImage(JpegXmpInfo::kGImageInfoType, image_destination);
}
bool JpegImageExtractor::ExtractImage(JpegXmpInfo::Type xmp_info_type,
DataDestination* image_destination) {
bool has_errors = false;
const bool has_image = jpeg_info_.HasImage(xmp_info_type);
Base64DecoderDataDestination base64_decoder(image_destination);
const vector<DataRange>& data_ranges =
jpeg_info_.GetSegmentDataRanges(xmp_info_type);
size_t data_ranges_count = data_ranges.size();
JpegXmpDataExtractor xmp_data_extractor(xmp_info_type, data_ranges_count,
&base64_decoder);
xmp_data_extractor.StartTransfer();
if (has_image) {
for (size_t index = 0; index < data_ranges_count; ++index) {
const DataRange& data_range = data_ranges[index];
xmp_data_extractor.SetSegmentIndex(index);
#if PHOTOS_EDITING_FORMATS_IMAGE_IO_JPEG_JPEG_IMAGE_EXTRACTOR_DEBUG
std::stringstream sstream;
sstream << "Segment " << index << " from " << data_range.GetBegin()
<< " to " << data_range.GetEnd();
MessageHandler::Get()->ReportMessage(Message::kStatus, sstream.str());
#endif // PHOTOS_EDITING_FORMATS_IMAGE_IO_JPEG_JPEG_IMAGE_EXTRACTOR_DEBUG
DataSource::TransferDataResult result = data_source_->TransferData(
data_range, kBestDataSize, &xmp_data_extractor);
if (result == DataSource::kTransferDataError) {
has_errors = true;
break;
} else if (result == DataSource::kTransferDataNone) {
has_errors = true;
MessageHandler::Get()->ReportMessage(Message::kPrematureEndOfDataError,
"");
}
}
}
xmp_data_extractor.FinishTransfer();
return has_image && !has_errors;
}
} // namespace image_io
} // namespace photos_editing_formats
|
