mathtables.c File Reference

#include <stdint.h>
#include "mathops.h"

Go to the source code of this file.

Macros
#define	times4(x)   x, x, x, x
#define	times256(x)   times4(times4(times4(times4(times4(x)))))

Variables
const uint32_t	ff_inverse [257]
const uint8_t	ff_sqrt_tab [256]
const uint8_t	ff_crop_tab [256+2 *MAX_NEG_CROP]
const uint8_t	ff_zigzag_direct [64]
const uint8_t	ff_zigzag_scan [16+1]

Macro Definition Documentation

times4

#define times4

(

x

)

x, x, x, x

Definition at line 74 of file mathtables.c.

times256

#define times256

(

x

)

times4(times4(times4(times4(times4(x)))))

Definition at line 75 of file mathtables.c.

Variable Documentation

ff_inverse

const uint32_t ff_inverse[257]

Definition at line 27 of file mathtables.c.

Referenced by dct_quantize(), ff_msmpeg4_pred_dc(), and setup_classifs().

ff_sqrt_tab

const uint8_t ff_sqrt_tab[256]

Initial value:

={
  0, 16, 23, 28, 32, 36, 40, 43, 46, 48, 51, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 77, 79, 80, 82, 84, 85, 87, 88, 90,
 91, 92, 94, 95, 96, 98, 99,100,102,103,104,105,107,108,109,110,111,112,114,115,116,117,118,119,120,121,122,123,124,125,126,127,
128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,144,145,146,147,148,149,150,151,151,152,153,154,155,156,156,
157,158,159,160,160,161,162,163,164,164,165,166,167,168,168,169,170,171,171,172,173,174,174,175,176,176,177,178,179,179,180,181,
182,182,183,184,184,185,186,186,187,188,188,189,190,190,191,192,192,193,194,194,195,196,196,197,198,198,199,200,200,201,202,202,
203,204,204,205,205,206,207,207,208,208,209,210,210,211,212,212,213,213,214,215,215,216,216,217,218,218,219,219,220,220,221,222,
222,223,223,224,224,225,226,226,227,227,228,228,229,230,230,231,231,232,232,233,233,234,235,235,236,236,237,237,238,238,239,239,
240,240,241,242,242,243,243,244,244,245,245,246,246,247,247,248,248,249,249,250,250,251,251,252,252,253,253,254,254,255,255,255
}

Definition at line 63 of file mathtables.c.

Referenced by ff_sqrt().

ff_crop_tab

const uint8_t ff_crop_tab[256+2 *MAX_NEG_CROP]

Initial value:

= {
times256(0x00),
0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,
0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1A,0x1B,0x1C,0x1D,0x1E,0x1F,
0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,
0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3A,0x3B,0x3C,0x3D,0x3E,0x3F,
0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4A,0x4B,0x4C,0x4D,0x4E,0x4F,
0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5A,0x5B,0x5C,0x5D,0x5E,0x5F,
0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6A,0x6B,0x6C,0x6D,0x6E,0x6F,
0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,
0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,
0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F,
0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF,
0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF,
0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF,
0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF,
0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF,
0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,
times256(0xFF)
}

Definition at line 77 of file mathtables.c.

ff_zigzag_direct

const uint8_t ff_zigzag_direct[64]

Initial value:

= {
    0,   1,  8, 16,  9,  2,  3, 10,
    17, 24, 32, 25, 18, 11,  4,  5,
    12, 19, 26, 33, 40, 48, 41, 34,
    27, 20, 13,  6,  7, 14, 21, 28,
    35, 42, 49, 56, 57, 50, 43, 36,
    29, 22, 15, 23, 30, 37, 44, 51,
    58, 59, 52, 45, 38, 31, 39, 46,
    53, 60, 61, 54, 47, 55, 62, 63
}

Definition at line 98 of file mathtables.c.

Referenced by compute_quant_matrix(), decode_block(), decode_dct(), decode_gop_header(), decode_i_block(), decode_init(), decode_scaling_list(), decode_studio_vop_header(), decode_vol_header(), decode_vop_header(), dnxhd_decode_header(), dnxhd_init_qmat(), dv_init_enc_block(), dvvideo_decode_init(), encode_picture(), ff_cavs_init(), ff_mpv_idct_init(), ff_rtjpeg_init(), ff_vp56_init_context(), ff_write_quant_matrix(), fic_decode_block(), fill_quantization_matrices(), fill_scaling_lists(), hq_decode_block(), init_idct(), init_scan_tables(), jpg_decode_block(), jpg_init(), ljpeg_encode_init(), load_matrix(), mpeg_decode_picture_coding_extension(), mss4_decode_dct(), read_quant_matrix_ext(), speedhq_decode_init(), tgq_decode_init(), tqi_decode_init(), vaapi_mpeg2_start_frame(), vaapi_mpeg4_start_frame(), and vp3_decode_init().

ff_zigzag_scan

const uint8_t ff_zigzag_scan[16+1]

Initial value:

= {
    0 + 0 * 4, 1 + 0 * 4, 0 + 1 * 4, 0 + 2 * 4,
    1 + 1 * 4, 2 + 0 * 4, 3 + 0 * 4, 2 + 1 * 4,
    1 + 2 * 4, 0 + 3 * 4, 1 + 3 * 4, 2 + 2 * 4,
    3 + 1 * 4, 3 + 2 * 4, 2 + 3 * 4, 3 + 3 * 4,
}

Definition at line 109 of file mathtables.c.

Referenced by decode_mb_coeffs(), decode_scaling_list(), fill_scaling_lists(), init_scan_tables(), svq3_decode_block(), tscc2_decode_mb(), vp78_decode_init(), vp7_decode_frame_header(), and vp8_decode_block_coeffs_internal().