leonarski_fandClaude Opus 4.8
c332e45a54
JFJochBitShuffleCompressor::Compress now takes a dest_size and returns a negative value when the compressed output would not fit, instead of writing past the destination buffer. The check is lazy: before each block it verifies the remaining space still covers that block's worst case (mirrored by the new MaxCompressedBlockSize helper, consistent with MaxCompressedSize so a dest sized to MaxCompressedSize never fails). On overflow the dest content is undefined - no rescue. The receiver uses this to compress directly into the writer buffer slot and drop just the oversized frame instead of pre-reserving the full worst-case image size next to the per-image CBOR metadata. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
30 lines
1.1 KiB
C++
30 lines
1.1 KiB
C++
// SPDX-FileCopyrightText: 2024 Filip Leonarski, Paul Scherrer Institute <filip.leonarski@psi.ch>
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// SPDX-License-Identifier: GPL-3.0-only
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#pragma once
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#include "../common/DiffractionExperiment.h"
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#include "JFJochCompressor.h"
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#include "../common/JFJochMessages.h"
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#include "../fpga/pcie_driver/jfjoch_fpga.h"
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class FrameTransformation {
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const DiffractionExperiment& experiment;
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JFJochBitShuffleCompressor compressor;
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std::vector<char> precompression_buffer;
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std::vector<char> compressed_buffer;
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std::vector<char> err_value;
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const size_t pixel_depth;
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const CompressedImageMode image_mode;
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public:
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explicit FrameTransformation(const DiffractionExperiment &experiment);
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void ProcessModule(const DeviceOutput *output, int data_stream);
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void ProcessModule(const void *input, uint16_t module_number, int data_stream);
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void FillNotCollectedModule(uint16_t module_number, int data_stream);
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CompressedImage GetCompressedImage();
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int64_t CompressImage(void *output, size_t output_size); // < 0 - error in Compression
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const void *GetImage() const;
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};
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