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/* vlc.h, variable length code tables (used by routines in putvlc.c) */
/* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */
/*
* Disclaimer of Warranty
*
* These software programs are available to the user without any license fee or
* royalty on an "as is" basis. The MPEG Software Simulation Group disclaims
* any and all warranties, whether express, implied, or statuary, including any
* implied warranties or merchantability or of fitness for a particular
* purpose. In no event shall the copyright-holder be liable for any
* incidental, punitive, or consequential damages of any kind whatsoever
* arising from the use of these programs.
*
* This disclaimer of warranty extends to the user of these programs and user's
* customers, employees, agents, transferees, successors, and assigns.
*
* The MPEG Software Simulation Group does not represent or warrant that the
* programs furnished hereunder are free of infringement of any third-party
* patents.
*
* Commercial implementations of MPEG-1 and MPEG-2 video, including shareware,
* are subject to royalty fees to patent holders. Many of these patents are
* general enough such that they are unavoidable regardless of implementation
* design.
*
*/
/* type definitions for variable length code table entries */
typedef struct
{
unsigned char code; /* right justified */
char len;
} VLCtable;
/* for codes longer than 8 bits (excluding leading zeroes) */
typedef struct
{
unsigned short code; /* right justified */
char len;
} sVLCtable;
/* data from ISO/IEC 13818-2 DIS, Annex B, variable length code tables */
/* Table B-1, variable length codes for macroblock_address_increment
*
* indexed by [macroblock_address_increment-1]
* 'macroblock_escape' is treated elsewhere
*/
static VLCtable addrinctab[33]=
{
{0x01,1}, {0x03,3}, {0x02,3}, {0x03,4},
{0x02,4}, {0x03,5}, {0x02,5}, {0x07,7},
{0x06,7}, {0x0b,8}, {0x0a,8}, {0x09,8},
{0x08,8}, {0x07,8}, {0x06,8}, {0x17,10},
{0x16,10}, {0x15,10}, {0x14,10}, {0x13,10},
{0x12,10}, {0x23,11}, {0x22,11}, {0x21,11},
{0x20,11}, {0x1f,11}, {0x1e,11}, {0x1d,11},
{0x1c,11}, {0x1b,11}, {0x1a,11}, {0x19,11},
{0x18,11}
};
/* Table B-2, B-3, B-4 variable length codes for macroblock_type
*
* indexed by [macroblock_type]
*/
static VLCtable mbtypetab[3][32]=
{
/* I */
{
{0,0}, {1,1}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0},
{0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0},
{0,0}, {1,2}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0},
{0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}
},
/* P */
{
{0,0}, {3,5}, {1,2}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0},
{1,3}, {0,0}, {1,1}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0},
{0,0}, {1,6}, {1,5}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0},
{0,0}, {0,0}, {2,5}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}
},
/* B */
{
{0,0}, {3,5}, {0,0}, {0,0}, {2,3}, {0,0}, {3,3}, {0,0},
{2,4}, {0,0}, {3,4}, {0,0}, {2,2}, {0,0}, {3,2}, {0,0},
{0,0}, {1,6}, {0,0}, {0,0}, {0,0}, {0,0}, {2,6}, {0,0},
{0,0}, {0,0}, {3,6}, {0,0}, {0,0}, {0,0}, {2,5}, {0,0}
}
};
/* Table B-5 ... B-8 variable length codes for macroblock_type in
* scalable sequences
*
* not implemented
*/
/* Table B-9, variable length codes for coded_block_pattern
*
* indexed by [coded_block_pattern]
*/
static VLCtable cbptable[64]=
{
{0x01,9}, {0x0b,5}, {0x09,5}, {0x0d,6},
{0x0d,4}, {0x17,7}, {0x13,7}, {0x1f,8},
{0x0c,4}, {0x16,7}, {0x12,7}, {0x1e,8},
{0x13,5}, {0x1b,8}, {0x17,8}, {0x13,8},
{0x0b,4}, {0x15,7}, {0x11,7}, {0x1d,8},
{0x11,5}, {0x19,8}, {0x15,8}, {0x11,8},
{0x0f,6}, {0x0f,8}, {0x0d,8}, {0x03,9},
{0x0f,5}, {0x0b,8}, {0x07,8}, {0x07,9},
{0x0a,4}, {0x14,7}, {0x10,7}, {0x1c,8},
{0x0e,6}, {0x0e,8}, {0x0c,8}, {0x02,9},
{0x10,5}, {0x18,8}, {0x14,8}, {0x10,8},
{0x0e,5}, {0x0a,8}, {0x06,8}, {0x06,9},
{0x12,5}, {0x1a,8}, {0x16,8}, {0x12,8},
{0x0d,5}, {0x09,8}, {0x05,8}, {0x05,9},
{0x0c,5}, {0x08,8}, {0x04,8}, {0x04,9},
{0x07,3}, {0x0a,5}, {0x08,5}, {0x0c,6}
};
/* Table B-10, variable length codes for motion_code
*
* indexed by [abs(motion_code)]
* sign of motion_code is treated elsewhere
*/
static VLCtable motionvectab[17]=
{
{0x01,1}, {0x01,2}, {0x01,3}, {0x01,4},
{0x03,6}, {0x05,7}, {0x04,7}, {0x03,7},
{0x0b,9}, {0x0a,9}, {0x09,9}, {0x11,10},
{0x10,10}, {0x0f,10}, {0x0e,10}, {0x0d,10},
{0x0c,10}
};
/* Table B-11, variable length codes for dmvector
*
* treated elsewhere
*/
/* Table B-12, variable length codes for dct_dc_size_luminance
*
* indexed by [dct_dc_size_luminance]
*/
static sVLCtable DClumtab[12]=
{
{0x0004,3}, {0x0000,2}, {0x0001,2}, {0x0005,3}, {0x0006,3}, {0x000e,4},
{0x001e,5}, {0x003e,6}, {0x007e,7}, {0x00fe,8}, {0x01fe,9}, {0x01ff,9}
};
/* Table B-13, variable length codes for dct_dc_size_chrominance
*
* indexed by [dct_dc_size_chrominance]
*/
static sVLCtable DCchromtab[12]=
{
{0x0000,2}, {0x0001,2}, {0x0002,2}, {0x0006,3}, {0x000e,4}, {0x001e,5},
{0x003e,6}, {0x007e,7}, {0x00fe,8}, {0x01fe,9}, {0x03fe,10},{0x03ff,10}
};
/* Table B-14, DCT coefficients table zero
*
* indexed by [run][level-1]
* split into two tables (dct_code_tab1, dct_code_tab2) to reduce size
* 'first DCT coefficient' condition and 'End of Block' are treated elsewhere
* codes do not include s (sign bit)
*/
static VLCtable dct_code_tab1[2][40]=
{
/* run = 0, level = 1...40 */
{
{0x03, 2}, {0x04, 4}, {0x05, 5}, {0x06, 7},
{0x26, 8}, {0x21, 8}, {0x0a,10}, {0x1d,12},
{0x18,12}, {0x13,12}, {0x10,12}, {0x1a,13},
{0x19,13}, {0x18,13}, {0x17,13}, {0x1f,14},
{0x1e,14}, {0x1d,14}, {0x1c,14}, {0x1b,14},
{0x1a,14}, {0x19,14}, {0x18,14}, {0x17,14},
{0x16,14}, {0x15,14}, {0x14,14}, {0x13,14},
{0x12,14}, {0x11,14}, {0x10,14}, {0x18,15},
{0x17,15}, {0x16,15}, {0x15,15}, {0x14,15},
{0x13,15}, {0x12,15}, {0x11,15}, {0x10,15}
},
/* run = 1, level = 1...18 */
{
{0x03, 3}, {0x06, 6}, {0x25, 8}, {0x0c,10},
{0x1b,12}, {0x16,13}, {0x15,13}, {0x1f,15},
{0x1e,15}, {0x1d,15}, {0x1c,15}, {0x1b,15},
{0x1a,15}, {0x19,15}, {0x13,16}, {0x12,16},
{0x11,16}, {0x10,16}, {0x00, 0}, {0x00, 0},
{0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0},
{0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0},
{0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0},
{0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0},
{0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}
}
};
static VLCtable dct_code_tab2[30][5]=
{
/* run = 2...31, level = 1...5 */
{{0x05, 4}, {0x04, 7}, {0x0b,10}, {0x14,12}, {0x14,13}},
{{0x07, 5}, {0x24, 8}, {0x1c,12}, {0x13,13}, {0x00, 0}},
{{0x06, 5}, {0x0f,10}, {0x12,12}, {0x00, 0}, {0x00, 0}},
{{0x07, 6}, {0x09,10}, {0x12,13}, {0x00, 0}, {0x00, 0}},
{{0x05, 6}, {0x1e,12}, {0x14,16}, {0x00, 0}, {0x00, 0}},
{{0x04, 6}, {0x15,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x07, 7}, {0x11,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x05, 7}, {0x11,13}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x27, 8}, {0x10,13}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x23, 8}, {0x1a,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x22, 8}, {0x19,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x20, 8}, {0x18,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x0e,10}, {0x17,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x0d,10}, {0x16,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x08,10}, {0x15,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1f,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1a,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x19,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x17,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x16,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1f,13}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1e,13}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1d,13}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1c,13}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1b,13}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1f,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1e,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1d,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1c,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1b,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}}
};
/* Table B-15, DCT coefficients table one
*
* indexed by [run][level-1]
* split into two tables (dct_code_tab1a, dct_code_tab2a) to reduce size
* 'End of Block' is treated elsewhere
* codes do not include s (sign bit)
*/
static VLCtable dct_code_tab1a[2][40]=
{
/* run = 0, level = 1...40 */
{
{0x02, 2}, {0x06, 3}, {0x07, 4}, {0x1c, 5},
{0x1d, 5}, {0x05, 6}, {0x04, 6}, {0x7b, 7},
{0x7c, 7}, {0x23, 8}, {0x22, 8}, {0xfa, 8},
{0xfb, 8}, {0xfe, 8}, {0xff, 8}, {0x1f,14},
{0x1e,14}, {0x1d,14}, {0x1c,14}, {0x1b,14},
{0x1a,14}, {0x19,14}, {0x18,14}, {0x17,14},
{0x16,14}, {0x15,14}, {0x14,14}, {0x13,14},
{0x12,14}, {0x11,14}, {0x10,14}, {0x18,15},
{0x17,15}, {0x16,15}, {0x15,15}, {0x14,15},
{0x13,15}, {0x12,15}, {0x11,15}, {0x10,15}
},
/* run = 1, level = 1...18 */
{
{0x02, 3}, {0x06, 5}, {0x79, 7}, {0x27, 8},
{0x20, 8}, {0x16,13}, {0x15,13}, {0x1f,15},
{0x1e,15}, {0x1d,15}, {0x1c,15}, {0x1b,15},
{0x1a,15}, {0x19,15}, {0x13,16}, {0x12,16},
{0x11,16}, {0x10,16}, {0x00, 0}, {0x00, 0},
{0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0},
{0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0},
{0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0},
{0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0},
{0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}
}
};
static VLCtable dct_code_tab2a[30][5]=
{
/* run = 2...31, level = 1...5 */
{{0x05, 5}, {0x07, 7}, {0xfc, 8}, {0x0c,10}, {0x14,13}},
{{0x07, 5}, {0x26, 8}, {0x1c,12}, {0x13,13}, {0x00, 0}},
{{0x06, 6}, {0xfd, 8}, {0x12,12}, {0x00, 0}, {0x00, 0}},
{{0x07, 6}, {0x04, 9}, {0x12,13}, {0x00, 0}, {0x00, 0}},
{{0x06, 7}, {0x1e,12}, {0x14,16}, {0x00, 0}, {0x00, 0}},
{{0x04, 7}, {0x15,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x05, 7}, {0x11,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x78, 7}, {0x11,13}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x7a, 7}, {0x10,13}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x21, 8}, {0x1a,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x25, 8}, {0x19,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x24, 8}, {0x18,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x05, 9}, {0x17,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x07, 9}, {0x16,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x0d,10}, {0x15,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1f,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1a,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x19,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x17,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x16,12}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1f,13}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1e,13}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1d,13}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1c,13}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1b,13}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1f,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1e,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1d,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1c,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}},
{{0x1b,16}, {0x00, 0}, {0x00, 0}, {0x00, 0}, {0x00, 0}}
};
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