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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /third_party/jpeg-xl/lib/jxl/jpeg/dec_jpeg_serialization_state.h | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | third_party/jpeg-xl/lib/jxl/jpeg/dec_jpeg_serialization_state.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/lib/jxl/jpeg/dec_jpeg_serialization_state.h b/third_party/jpeg-xl/lib/jxl/jpeg/dec_jpeg_serialization_state.h new file mode 100644 index 0000000000..40ce450a76 --- /dev/null +++ b/third_party/jpeg-xl/lib/jxl/jpeg/dec_jpeg_serialization_state.h @@ -0,0 +1,96 @@ +// Copyright (c) the JPEG XL Project Authors. All rights reserved. +// +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +#ifndef LIB_JXL_JPEG_DEC_JPEG_SERIALIZATION_STATE_H_ +#define LIB_JXL_JPEG_DEC_JPEG_SERIALIZATION_STATE_H_ + +#include <deque> +#include <vector> + +#include "lib/jxl/jpeg/dec_jpeg_output_chunk.h" +#include "lib/jxl/jpeg/jpeg_data.h" + +namespace jxl { +namespace jpeg { + +struct HuffmanCodeTable { + int depth[256]; + int code[256]; + void InitDepths() { std::fill(std::begin(depth), std::end(depth), 0); } +}; + +// Handles the packing of bits into output bytes. +struct JpegBitWriter { + bool healthy; + std::deque<OutputChunk>* output; + OutputChunk chunk; + uint8_t* data; + size_t pos; + uint64_t put_buffer; + int put_bits; +}; + +// Holds data that is buffered between 8x8 blocks in progressive mode. +struct DCTCodingState { + // The run length of end-of-band symbols in a progressive scan. + int eob_run_; + // The huffman table to be used when flushing the state. + HuffmanCodeTable* cur_ac_huff_; + // The sequence of currently buffered refinement bits for a successive + // approximation scan (one where Ah > 0). + std::vector<int> refinement_bits_; +}; + +struct EncodeScanState { + enum Stage { HEAD, BODY }; + + Stage stage = HEAD; + + int mcu_y; + JpegBitWriter bw; + coeff_t last_dc_coeff[kMaxComponents] = {0}; + int restarts_to_go; + int next_restart_marker; + int block_scan_index; + DCTCodingState coding_state; + size_t extra_zero_runs_pos; + int next_extra_zero_run_index; + size_t next_reset_point_pos; + int next_reset_point; +}; + +struct SerializationState { + enum Stage { + STAGE_INIT, + STAGE_SERIALIZE_SECTION, + STAGE_DONE, + STAGE_ERROR, + }; + + Stage stage = STAGE_INIT; + + std::deque<OutputChunk> output_queue; + + size_t section_index = 0; + int dht_index = 0; + int dqt_index = 0; + int app_index = 0; + int com_index = 0; + int data_index = 0; + int scan_index = 0; + std::vector<HuffmanCodeTable> dc_huff_table; + std::vector<HuffmanCodeTable> ac_huff_table; + const uint8_t* pad_bits = nullptr; + const uint8_t* pad_bits_end = nullptr; + bool seen_dri_marker = false; + bool is_progressive = false; + + EncodeScanState scan_state; +}; + +} // namespace jpeg +} // namespace jxl + +#endif // LIB_JXL_JPEG_DEC_JPEG_SERIALIZATION_STATE_H_ |