evgeny
38c9f229bc
- u_async.c: process immediate_queue BEFORE epoll_wait in uasync_poll - stcp_link.c: defensive NULL etcp_conn/etcp_link in stcp_link_close - utun_instance.c: move stcp_server_list_destroy_all to Phase J (before ETCP), add deferred drain in both Phase J and L - stcp.h/c: STCP_HS_ENC_CLIENT 6→38, STCP_HS_ENC_SERVER 7→39, exchange ed25519_pubkey in both handshake directions - etcp_connections.c: copy peer_ed25519 from STCP to ETCP_CONN in etcp_link_enter_ready_tcp; guard link->etcp in tcp_link_close_cb - chat_sync.c: fix lk->conn NULL dereference for TCP links - test_stcp.c: update stcp_server_create/stcp_client_connect callsites - tools/chat_tcp_test: change transport udp→tcp
59 lines
1.3 KiB
C++
59 lines
1.3 KiB
C++
/*
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* Copyright 2020 Axel Waggershauser
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*/
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include "BinaryBitmap.h"
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#include "BitMatrix.h"
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#include <cstdint>
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namespace ZXing {
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class ThresholdBinarizer : public BinaryBitmap
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{
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const uint8_t _threshold = 0;
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public:
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ThresholdBinarizer(const ImageView& buffer, uint8_t threshold = 128) : BinaryBitmap(buffer), _threshold(threshold) {}
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bool getPatternRow(int row, int rotation, PatternRow& res) const override
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{
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auto buffer = _buffer.rotated(rotation);
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const int stride = buffer.pixStride();
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const uint8_t* begin = buffer.data(0, row) + GreenIndex(buffer.format());
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const uint8_t* end = begin + buffer.width() * stride;
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auto* lastPos = begin;
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bool lastVal = false;
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res.clear();
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for (const uint8_t* p = begin; p != end; p += stride) {
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bool val = *p <= _threshold;
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if (val != lastVal) {
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res.push_back(narrow_cast<PatternRow::value_type>((p - lastPos) / stride));
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lastVal = val;
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lastPos = p;
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}
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}
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res.push_back(narrow_cast<PatternRow::value_type>((end - lastPos) / stride));
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if (*(end - stride) <= _threshold)
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res.push_back(0); // last value is number of white pixels, here 0
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return true;
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}
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std::shared_ptr<const BitMatrix> getBlackMatrix() const override
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{
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return std::make_shared<const BitMatrix>(binarize(_threshold));
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}
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};
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} // ZXing
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