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author | Moonchild <moonchild@palemoon.org> | 2020-11-13 15:59:29 +0000 |
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committer | Moonchild <moonchild@palemoon.org> | 2020-11-18 10:58:22 +0000 |
commit | b645d59b1e170af1cb0963935bd8c915e56c431c (patch) | |
tree | 49fdc8001d5758558ada7a711f31e08095388294 /modules/brotli/dec/state.h | |
parent | 71e0814af25e8619782294e65aa42aa1044dabdc (diff) | |
download | UXP-b645d59b1e170af1cb0963935bd8c915e56c431c.tar UXP-b645d59b1e170af1cb0963935bd8c915e56c431c.tar.gz UXP-b645d59b1e170af1cb0963935bd8c915e56c431c.tar.lz UXP-b645d59b1e170af1cb0963935bd8c915e56c431c.tar.xz UXP-b645d59b1e170af1cb0963935bd8c915e56c431c.zip |
Issue #1683 - Update Brotli lib to 1.0.9
Diffstat (limited to 'modules/brotli/dec/state.h')
-rw-r--r-- | modules/brotli/dec/state.h | 181 |
1 files changed, 144 insertions, 37 deletions
diff --git a/modules/brotli/dec/state.h b/modules/brotli/dec/state.h index d28b63920..54dab698b 100644 --- a/modules/brotli/dec/state.h +++ b/modules/brotli/dec/state.h @@ -21,6 +21,95 @@ extern "C" { #endif +/* Graphviz diagram that describes state transitions: + +digraph States { + graph [compound=true] + concentrate=true + node [shape="box"] + + UNINITED -> {LARGE_WINDOW_BITS -> INITIALIZE} + subgraph cluster_metablock_workflow { + style="rounded" + label=< <B>METABLOCK CYCLE</B> > + METABLOCK_BEGIN -> METABLOCK_HEADER + METABLOCK_HEADER:sw -> METADATA + METABLOCK_HEADER:s -> UNCOMPRESSED + METABLOCK_HEADER:se -> METABLOCK_DONE:ne + METADATA:s -> METABLOCK_DONE:w + UNCOMPRESSED:s -> METABLOCK_DONE:n + METABLOCK_DONE:e -> METABLOCK_BEGIN:e [constraint="false"] + } + INITIALIZE -> METABLOCK_BEGIN + METABLOCK_DONE -> DONE + + subgraph cluster_compressed_metablock { + style="rounded" + label=< <B>COMPRESSED METABLOCK</B> > + + subgraph cluster_command { + style="rounded" + label=< <B>HOT LOOP</B> > + + _METABLOCK_DONE_PORT_ [shape=point style=invis] + + { + // Set different shape for nodes returning from "compressed metablock". + node [shape=invhouse]; CMD_INNER CMD_POST_DECODE_LITERALS; + CMD_POST_WRAP_COPY; CMD_INNER_WRITE; CMD_POST_WRITE_1; + } + + CMD_BEGIN -> CMD_INNER -> CMD_POST_DECODE_LITERALS -> CMD_POST_WRAP_COPY + + // IO ("write") nodes are not in the hot loop! + CMD_INNER_WRITE [style=dashed] + CMD_INNER -> CMD_INNER_WRITE + CMD_POST_WRITE_1 [style=dashed] + CMD_POST_DECODE_LITERALS -> CMD_POST_WRITE_1 + CMD_POST_WRITE_2 [style=dashed] + CMD_POST_WRAP_COPY -> CMD_POST_WRITE_2 + + CMD_POST_WRITE_1 -> CMD_BEGIN:s [constraint="false"] + CMD_INNER_WRITE -> {CMD_INNER CMD_POST_DECODE_LITERALS} + [constraint="false"] + CMD_BEGIN:ne -> CMD_POST_DECODE_LITERALS [constraint="false"] + CMD_POST_WRAP_COPY -> CMD_BEGIN [constraint="false"] + CMD_POST_DECODE_LITERALS -> CMD_BEGIN:ne [constraint="false"] + CMD_POST_WRITE_2 -> CMD_POST_WRAP_COPY [constraint="false"] + {rank=same; CMD_BEGIN; CMD_INNER; CMD_POST_DECODE_LITERALS; + CMD_POST_WRAP_COPY} + {rank=same; CMD_INNER_WRITE; CMD_POST_WRITE_1; CMD_POST_WRITE_2} + + {CMD_INNER CMD_POST_DECODE_LITERALS CMD_POST_WRAP_COPY} -> + _METABLOCK_DONE_PORT_ [style=invis] + {CMD_INNER_WRITE CMD_POST_WRITE_1} -> _METABLOCK_DONE_PORT_ + [constraint="false" style=invis] + } + + BEFORE_COMPRESSED_METABLOCK_HEADER:s -> HUFFMAN_CODE_0:n + HUFFMAN_CODE_0 -> HUFFMAN_CODE_1 -> HUFFMAN_CODE_2 -> HUFFMAN_CODE_3 + HUFFMAN_CODE_0 -> METABLOCK_HEADER_2 -> CONTEXT_MODES -> CONTEXT_MAP_1 + CONTEXT_MAP_1 -> CONTEXT_MAP_2 -> TREE_GROUP + TREE_GROUP -> BEFORE_COMPRESSED_METABLOCK_BODY:e + BEFORE_COMPRESSED_METABLOCK_BODY:s -> CMD_BEGIN:n + + HUFFMAN_CODE_3:e -> HUFFMAN_CODE_0:ne [constraint="false"] + {rank=same; HUFFMAN_CODE_0; HUFFMAN_CODE_1; HUFFMAN_CODE_2; HUFFMAN_CODE_3} + {rank=same; METABLOCK_HEADER_2; CONTEXT_MODES; CONTEXT_MAP_1; CONTEXT_MAP_2; + TREE_GROUP} + } + METABLOCK_HEADER:e -> BEFORE_COMPRESSED_METABLOCK_HEADER:n + + _METABLOCK_DONE_PORT_ -> METABLOCK_DONE:se + [constraint="false" ltail=cluster_command] + + UNINITED [shape=Mdiamond]; + DONE [shape=Msquare]; +} + + + */ + typedef enum { BROTLI_STATE_UNINITED, BROTLI_STATE_LARGE_WINDOW_BITS, @@ -39,6 +128,7 @@ typedef enum { BROTLI_STATE_METABLOCK_DONE, BROTLI_STATE_COMMAND_POST_WRITE_1, BROTLI_STATE_COMMAND_POST_WRITE_2, + BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_HEADER, BROTLI_STATE_HUFFMAN_CODE_0, BROTLI_STATE_HUFFMAN_CODE_1, BROTLI_STATE_HUFFMAN_CODE_2, @@ -46,6 +136,7 @@ typedef enum { BROTLI_STATE_CONTEXT_MAP_1, BROTLI_STATE_CONTEXT_MAP_2, BROTLI_STATE_TREE_GROUP, + BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_BODY, BROTLI_STATE_DONE } BrotliRunningState; @@ -98,6 +189,50 @@ typedef enum { BROTLI_STATE_READ_BLOCK_LENGTH_SUFFIX } BrotliRunningReadBlockLengthState; +typedef struct BrotliMetablockHeaderArena { + BrotliRunningTreeGroupState substate_tree_group; + BrotliRunningContextMapState substate_context_map; + BrotliRunningHuffmanState substate_huffman; + + uint32_t sub_loop_counter; + + uint32_t repeat_code_len; + uint32_t prev_code_len; + + /* For ReadHuffmanCode. */ + uint32_t symbol; + uint32_t repeat; + uint32_t space; + + /* Huffman table for "histograms". */ + HuffmanCode table[32]; + /* List of heads of symbol chains. */ + uint16_t* symbol_lists; + /* Storage from symbol_lists. */ + uint16_t symbols_lists_array[BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1 + + BROTLI_NUM_COMMAND_SYMBOLS]; + /* Tails of symbol chains. */ + int next_symbol[32]; + uint8_t code_length_code_lengths[BROTLI_CODE_LENGTH_CODES]; + /* Population counts for the code lengths. */ + uint16_t code_length_histo[16]; + + /* For HuffmanTreeGroupDecode. */ + int htree_index; + HuffmanCode* next; + + /* For DecodeContextMap. */ + uint32_t context_index; + uint32_t max_run_length_prefix; + uint32_t code; + HuffmanCode context_map_table[BROTLI_HUFFMAN_MAX_SIZE_272]; +} BrotliMetablockHeaderArena; + +typedef struct BrotliMetablockBodyArena { + uint8_t dist_extra_bits[544]; + uint32_t dist_offset[544]; +} BrotliMetablockBodyArena; + struct BrotliDecoderStateStruct { BrotliRunningState state; @@ -110,7 +245,8 @@ struct BrotliDecoderStateStruct { brotli_free_func free_func; void* memory_manager_opaque; - /* Temporary storage for remaining input. */ + /* Temporary storage for remaining input. Brotli stream format is designed in + a way, that 64 bits are enough to make progress in decoding. */ union { uint64_t u64; uint8_t u8[8]; @@ -125,7 +261,6 @@ struct BrotliDecoderStateStruct { int dist_rb_idx; int dist_rb[4]; int error_code; - uint32_t sub_loop_counter; uint8_t* ringbuffer; uint8_t* ringbuffer_end; HuffmanCode* htree_command; @@ -153,13 +288,10 @@ struct BrotliDecoderStateStruct { uint32_t block_type_rb[6]; uint32_t distance_postfix_bits; uint32_t num_direct_distance_codes; - int distance_postfix_mask; uint32_t num_dist_htrees; uint8_t* dist_context_map; HuffmanCode* literal_htree; uint8_t dist_htree_index; - uint32_t repeat_code_len; - uint32_t prev_code_len; int copy_length; int distance_code; @@ -168,33 +300,6 @@ struct BrotliDecoderStateStruct { size_t rb_roundtrips; /* how many times we went around the ring-buffer */ size_t partial_pos_out; /* how much output to the user in total */ - /* For ReadHuffmanCode. */ - uint32_t symbol; - uint32_t repeat; - uint32_t space; - - HuffmanCode table[32]; - /* List of heads of symbol chains. */ - uint16_t* symbol_lists; - /* Storage from symbol_lists. */ - uint16_t symbols_lists_array[BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1 + - BROTLI_NUM_COMMAND_SYMBOLS]; - /* Tails of symbol chains. */ - int next_symbol[32]; - uint8_t code_length_code_lengths[BROTLI_CODE_LENGTH_CODES]; - /* Population counts for the code lengths. */ - uint16_t code_length_histo[16]; - - /* For HuffmanTreeGroupDecode. */ - int htree_index; - HuffmanCode* next; - - /* For DecodeContextMap. */ - uint32_t context_index; - uint32_t max_run_length_prefix; - uint32_t code; - HuffmanCode context_map_table[BROTLI_HUFFMAN_MAX_SIZE_272]; - /* For InverseMoveToFrontTransform. */ uint32_t mtf_upper_bound; uint32_t mtf[64 + 1]; @@ -203,10 +308,7 @@ struct BrotliDecoderStateStruct { /* States inside function calls. */ BrotliRunningMetablockHeaderState substate_metablock_header; - BrotliRunningTreeGroupState substate_tree_group; - BrotliRunningContextMapState substate_context_map; BrotliRunningUncompressedState substate_uncompressed; - BrotliRunningHuffmanState substate_huffman; BrotliRunningDecodeUint8State substate_decode_uint8; BrotliRunningReadBlockLengthState substate_read_block_length; @@ -229,6 +331,11 @@ struct BrotliDecoderStateStruct { const BrotliTransforms* transforms; uint32_t trivial_literal_contexts[8]; /* 256 bits */ + + union { + BrotliMetablockHeaderArena header; + BrotliMetablockBodyArena body; + } arena; }; typedef struct BrotliDecoderStateStruct BrotliDecoderStateInternal; @@ -241,8 +348,8 @@ BROTLI_INTERNAL void BrotliDecoderStateMetablockBegin(BrotliDecoderState* s); BROTLI_INTERNAL void BrotliDecoderStateCleanupAfterMetablock( BrotliDecoderState* s); BROTLI_INTERNAL BROTLI_BOOL BrotliDecoderHuffmanTreeGroupInit( - BrotliDecoderState* s, HuffmanTreeGroup* group, uint32_t alphabet_size, - uint32_t max_symbol, uint32_t ntrees); + BrotliDecoderState* s, HuffmanTreeGroup* group, uint32_t alphabet_size_max, + uint32_t alphabet_size_limit, uint32_t ntrees); #define BROTLI_DECODER_ALLOC(S, L) S->alloc_func(S->memory_manager_opaque, L) |