1 #include "image_io/base/data_range_tracking_destination.h" 2 3 namespace photos_editing_formats { 4 namespace image_io { 5 6 void DataRangeTrackingDestination::StartTransfer() { 7 tracked_data_range_ = DataRange(); 8 bytes_transferred_ = 0; 9 has_disjoint_transfer_ranges_ = false; 10 if (destination_ != nullptr) { 11 destination_->StartTransfer(); 12 } 13 } 14 15 DataDestination::TransferStatus DataRangeTrackingDestination::Transfer( 16 const DataRange& transfer_range, const DataSegment& data_segment) { 17 DataDestination::TransferStatus transfer_status = 18 destination_ ? destination_->Transfer(transfer_range, data_segment) 19 : DataDestination::kTransferOk; 20 if (transfer_status != kTransferError) { 21 bytes_transferred_ += transfer_range.GetLength(); 22 } 23 if (has_disjoint_transfer_ranges_) { 24 return transfer_status; 25 } 26 if (!tracked_data_range_.IsValid()) { 27 tracked_data_range_ = transfer_range; 28 return transfer_status; 29 } 30 if (tracked_data_range_.GetEnd() == transfer_range.GetBegin()) { 31 tracked_data_range_ = 32 DataRange(tracked_data_range_.GetBegin(), transfer_range.GetEnd()); 33 return transfer_status; 34 } else { 35 has_disjoint_transfer_ranges_ = true; 36 return transfer_status; 37 } 38 } 39 40 void DataRangeTrackingDestination::FinishTransfer() { 41 if (destination_ != nullptr) { 42 destination_->FinishTransfer(); 43 } 44 } 45 46 } // namespace image_io 47 } // namespace photos_editing_formats 48
