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Diffstat (limited to 'third_party/jpeg-xl/lib/jxl/dec_context_map.h')
-rw-r--r-- | third_party/jpeg-xl/lib/jxl/dec_context_map.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/lib/jxl/dec_context_map.h b/third_party/jpeg-xl/lib/jxl/dec_context_map.h new file mode 100644 index 0000000000..95b8a0ca92 --- /dev/null +++ b/third_party/jpeg-xl/lib/jxl/dec_context_map.h @@ -0,0 +1,30 @@ +// 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_DEC_CONTEXT_MAP_H_ +#define LIB_JXL_DEC_CONTEXT_MAP_H_ + +#include <stddef.h> +#include <stdint.h> + +#include <vector> + +#include "lib/jxl/dec_bit_reader.h" + +namespace jxl { + +// Context map uses uint8_t. +constexpr size_t kMaxClusters = 256; + +// Reads the context map from the bit stream. On calling this function, +// context_map->size() must be the number of possible context ids. +// Sets *num_htrees to the number of different histogram ids in +// *context_map. +Status DecodeContextMap(std::vector<uint8_t>* context_map, size_t* num_htrees, + BitReader* input); + +} // namespace jxl + +#endif // LIB_JXL_DEC_CONTEXT_MAP_H_ |