Index: third_party/libjpeg/jdhuff.h |
diff --git a/third_party/libjpeg/jdhuff.h b/third_party/libjpeg/jdhuff.h |
deleted file mode 100644 |
index ae19b6cafd7e81f94499d92876a6cf88bcafda86..0000000000000000000000000000000000000000 |
--- a/third_party/libjpeg/jdhuff.h |
+++ /dev/null |
@@ -1,201 +0,0 @@ |
-/* |
- * jdhuff.h |
- * |
- * Copyright (C) 1991-1997, Thomas G. Lane. |
- * This file is part of the Independent JPEG Group's software. |
- * For conditions of distribution and use, see the accompanying README file. |
- * |
- * This file contains declarations for Huffman entropy decoding routines |
- * that are shared between the sequential decoder (jdhuff.c) and the |
- * progressive decoder (jdphuff.c). No other modules need to see these. |
- */ |
- |
-/* Short forms of external names for systems with brain-damaged linkers. */ |
- |
-#ifdef NEED_SHORT_EXTERNAL_NAMES |
-#define jpeg_make_d_derived_tbl jMkDDerived |
-#define jpeg_fill_bit_buffer jFilBitBuf |
-#define jpeg_huff_decode jHufDecode |
-#endif /* NEED_SHORT_EXTERNAL_NAMES */ |
- |
- |
-/* Derived data constructed for each Huffman table */ |
- |
-#define HUFF_LOOKAHEAD 8 /* # of bits of lookahead */ |
- |
-typedef struct { |
- /* Basic tables: (element [0] of each array is unused) */ |
- INT32 maxcode[18]; /* largest code of length k (-1 if none) */ |
- /* (maxcode[17] is a sentinel to ensure jpeg_huff_decode terminates) */ |
- INT32 valoffset[17]; /* huffval[] offset for codes of length k */ |
- /* valoffset[k] = huffval[] index of 1st symbol of code length k, less |
- * the smallest code of length k; so given a code of length k, the |
- * corresponding symbol is huffval[code + valoffset[k]] |
- */ |
- |
- /* Link to public Huffman table (needed only in jpeg_huff_decode) */ |
- JHUFF_TBL *pub; |
- |
- /* Lookahead tables: indexed by the next HUFF_LOOKAHEAD bits of |
- * the input data stream. If the next Huffman code is no more |
- * than HUFF_LOOKAHEAD bits long, we can obtain its length and |
- * the corresponding symbol directly from these tables. |
- */ |
- int look_nbits[1<<HUFF_LOOKAHEAD]; /* # bits, or 0 if too long */ |
- UINT8 look_sym[1<<HUFF_LOOKAHEAD]; /* symbol, or unused */ |
-} d_derived_tbl; |
- |
-/* Expand a Huffman table definition into the derived format */ |
-EXTERN(void) jpeg_make_d_derived_tbl |
- JPP((j_decompress_ptr cinfo, boolean isDC, int tblno, |
- d_derived_tbl ** pdtbl)); |
- |
- |
-/* |
- * Fetching the next N bits from the input stream is a time-critical operation |
- * for the Huffman decoders. We implement it with a combination of inline |
- * macros and out-of-line subroutines. Note that N (the number of bits |
- * demanded at one time) never exceeds 15 for JPEG use. |
- * |
- * We read source bytes into get_buffer and dole out bits as needed. |
- * If get_buffer already contains enough bits, they are fetched in-line |
- * by the macros CHECK_BIT_BUFFER and GET_BITS. When there aren't enough |
- * bits, jpeg_fill_bit_buffer is called; it will attempt to fill get_buffer |
- * as full as possible (not just to the number of bits needed; this |
- * prefetching reduces the overhead cost of calling jpeg_fill_bit_buffer). |
- * Note that jpeg_fill_bit_buffer may return FALSE to indicate suspension. |
- * On TRUE return, jpeg_fill_bit_buffer guarantees that get_buffer contains |
- * at least the requested number of bits --- dummy zeroes are inserted if |
- * necessary. |
- */ |
- |
-typedef INT32 bit_buf_type; /* type of bit-extraction buffer */ |
-#define BIT_BUF_SIZE 32 /* size of buffer in bits */ |
- |
-/* If long is > 32 bits on your machine, and shifting/masking longs is |
- * reasonably fast, making bit_buf_type be long and setting BIT_BUF_SIZE |
- * appropriately should be a win. Unfortunately we can't define the size |
- * with something like #define BIT_BUF_SIZE (sizeof(bit_buf_type)*8) |
- * because not all machines measure sizeof in 8-bit bytes. |
- */ |
- |
-typedef struct { /* Bitreading state saved across MCUs */ |
- bit_buf_type get_buffer; /* current bit-extraction buffer */ |
- int bits_left; /* # of unused bits in it */ |
-} bitread_perm_state; |
- |
-typedef struct { /* Bitreading working state within an MCU */ |
- /* Current data source location */ |
- /* We need a copy, rather than munging the original, in case of suspension */ |
- const JOCTET * next_input_byte; /* => next byte to read from source */ |
- size_t bytes_in_buffer; /* # of bytes remaining in source buffer */ |
- /* Bit input buffer --- note these values are kept in register variables, |
- * not in this struct, inside the inner loops. |
- */ |
- bit_buf_type get_buffer; /* current bit-extraction buffer */ |
- int bits_left; /* # of unused bits in it */ |
- /* Pointer needed by jpeg_fill_bit_buffer. */ |
- j_decompress_ptr cinfo; /* back link to decompress master record */ |
-} bitread_working_state; |
- |
-/* Macros to declare and load/save bitread local variables. */ |
-#define BITREAD_STATE_VARS \ |
- register bit_buf_type get_buffer; \ |
- register int bits_left; \ |
- bitread_working_state br_state |
- |
-#define BITREAD_LOAD_STATE(cinfop,permstate) \ |
- br_state.cinfo = cinfop; \ |
- br_state.next_input_byte = cinfop->src->next_input_byte; \ |
- br_state.bytes_in_buffer = cinfop->src->bytes_in_buffer; \ |
- get_buffer = permstate.get_buffer; \ |
- bits_left = permstate.bits_left; |
- |
-#define BITREAD_SAVE_STATE(cinfop,permstate) \ |
- cinfop->src->next_input_byte = br_state.next_input_byte; \ |
- cinfop->src->bytes_in_buffer = br_state.bytes_in_buffer; \ |
- permstate.get_buffer = get_buffer; \ |
- permstate.bits_left = bits_left |
- |
-/* |
- * These macros provide the in-line portion of bit fetching. |
- * Use CHECK_BIT_BUFFER to ensure there are N bits in get_buffer |
- * before using GET_BITS, PEEK_BITS, or DROP_BITS. |
- * The variables get_buffer and bits_left are assumed to be locals, |
- * but the state struct might not be (jpeg_huff_decode needs this). |
- * CHECK_BIT_BUFFER(state,n,action); |
- * Ensure there are N bits in get_buffer; if suspend, take action. |
- * val = GET_BITS(n); |
- * Fetch next N bits. |
- * val = PEEK_BITS(n); |
- * Fetch next N bits without removing them from the buffer. |
- * DROP_BITS(n); |
- * Discard next N bits. |
- * The value N should be a simple variable, not an expression, because it |
- * is evaluated multiple times. |
- */ |
- |
-#define CHECK_BIT_BUFFER(state,nbits,action) \ |
- { if (bits_left < (nbits)) { \ |
- if (! jpeg_fill_bit_buffer(&(state),get_buffer,bits_left,nbits)) \ |
- { action; } \ |
- get_buffer = (state).get_buffer; bits_left = (state).bits_left; } } |
- |
-#define GET_BITS(nbits) \ |
- (((int) (get_buffer >> (bits_left -= (nbits)))) & ((1<<(nbits))-1)) |
- |
-#define PEEK_BITS(nbits) \ |
- (((int) (get_buffer >> (bits_left - (nbits)))) & ((1<<(nbits))-1)) |
- |
-#define DROP_BITS(nbits) \ |
- (bits_left -= (nbits)) |
- |
-/* Load up the bit buffer to a depth of at least nbits */ |
-EXTERN(boolean) jpeg_fill_bit_buffer |
- JPP((bitread_working_state * state, register bit_buf_type get_buffer, |
- register int bits_left, int nbits)); |
- |
- |
-/* |
- * Code for extracting next Huffman-coded symbol from input bit stream. |
- * Again, this is time-critical and we make the main paths be macros. |
- * |
- * We use a lookahead table to process codes of up to HUFF_LOOKAHEAD bits |
- * without looping. Usually, more than 95% of the Huffman codes will be 8 |
- * or fewer bits long. The few overlength codes are handled with a loop, |
- * which need not be inline code. |
- * |
- * Notes about the HUFF_DECODE macro: |
- * 1. Near the end of the data segment, we may fail to get enough bits |
- * for a lookahead. In that case, we do it the hard way. |
- * 2. If the lookahead table contains no entry, the next code must be |
- * more than HUFF_LOOKAHEAD bits long. |
- * 3. jpeg_huff_decode returns -1 if forced to suspend. |
- */ |
- |
-#define HUFF_DECODE(result,state,htbl,failaction,slowlabel) \ |
-{ register int nb, look; \ |
- if (bits_left < HUFF_LOOKAHEAD) { \ |
- if (! jpeg_fill_bit_buffer(&state,get_buffer,bits_left, 0)) {failaction;} \ |
- get_buffer = state.get_buffer; bits_left = state.bits_left; \ |
- if (bits_left < HUFF_LOOKAHEAD) { \ |
- nb = 1; goto slowlabel; \ |
- } \ |
- } \ |
- look = PEEK_BITS(HUFF_LOOKAHEAD); \ |
- if ((nb = htbl->look_nbits[look]) != 0) { \ |
- DROP_BITS(nb); \ |
- result = htbl->look_sym[look]; \ |
- } else { \ |
- nb = HUFF_LOOKAHEAD+1; \ |
-slowlabel: \ |
- if ((result=jpeg_huff_decode(&state,get_buffer,bits_left,htbl,nb)) < 0) \ |
- { failaction; } \ |
- get_buffer = state.get_buffer; bits_left = state.bits_left; \ |
- } \ |
-} |
- |
-/* Out-of-line case for Huffman code fetching */ |
-EXTERN(int) jpeg_huff_decode |
- JPP((bitread_working_state * state, register bit_buf_type get_buffer, |
- register int bits_left, d_derived_tbl * htbl, int min_bits)); |