/***************************************************************************** * * XVID MPEG-4 VIDEO CODEC * - Quantization matrix management code - * * Copyright(C) 2002 Michael Militzer * 2002 Peter Ross * * This program is free software ; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation ; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY ; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program ; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * \$Id: quant_matrix.c,v 1.13.2.3 2003/11/30 16:13:16 edgomez Exp \$ * ****************************************************************************/ #include "quant_matrix.h" #define FIX(X) (((X)==1) ? 0xFFFF : ((1UL << 16) / (X) + 1)) #define FIXL(X) ((1UL << 16) / (X) - 1) /***************************************************************************** * Default matrices ****************************************************************************/ static const uint8_t default_intra_matrix[64] = { 8, 17, 18, 19, 21, 23, 25, 27, 17, 18, 19, 21, 23, 25, 27, 28, 20, 21, 22, 23, 24, 26, 28, 30, 21, 22, 23, 24, 26, 28, 30, 32, 22, 23, 24, 26, 28, 30, 32, 35, 23, 24, 26, 28, 30, 32, 35, 38, 25, 26, 28, 30, 32, 35, 38, 41, 27, 28, 30, 32, 35, 38, 41, 45 }; static const uint8_t default_inter_matrix[64] = { 16, 17, 18, 19, 20, 21, 22, 23, 17, 18, 19, 20, 21, 22, 23, 24, 18, 19, 20, 21, 22, 23, 24, 25, 19, 20, 21, 22, 23, 24, 26, 27, 20, 21, 22, 23, 25, 26, 27, 28, 21, 22, 23, 24, 26, 27, 28, 30, 22, 23, 24, 26, 27, 28, 30, 31, 23, 24, 25, 27, 28, 30, 31, 33 }; const uint16_t * get_intra_matrix(const uint16_t * mpeg_quant_matrices) { return(mpeg_quant_matrices + 0*64); } const uint16_t * get_inter_matrix(const uint16_t * mpeg_quant_matrices) { return(mpeg_quant_matrices + 4*64); } const uint8_t * get_default_intra_matrix(void) { return default_intra_matrix; } const uint8_t * get_default_inter_matrix(void) { return default_inter_matrix; } int is_custom_intra_matrix(const uint16_t * mpeg_quant_matrices) { int i; const uint16_t *intra_matrix = get_intra_matrix(mpeg_quant_matrices); const uint8_t *def_intra_matrix = get_default_intra_matrix(); for (i = 0; i < 64; i++) { if(intra_matrix[i] != def_intra_matrix[i]) return 1; } return 0; } int is_custom_inter_matrix(const uint16_t * mpeg_quant_matrices) { int i; const uint16_t *inter_matrix = get_inter_matrix(mpeg_quant_matrices); const uint8_t *def_inter_matrix = get_default_inter_matrix(); for (i = 0; i < 64; i++) { if(inter_matrix[i] != (uint16_t)def_inter_matrix[i]) return 1; } return 0; } void set_intra_matrix(uint16_t * mpeg_quant_matrices, const uint8_t * matrix) { int i; uint16_t *intra_matrix = mpeg_quant_matrices + 0*64; uint16_t *intra_matrix1 = mpeg_quant_matrices + 1*64; uint16_t *intra_matrix_fix = mpeg_quant_matrices + 2*64; uint16_t *intra_matrix_fixl = mpeg_quant_matrices + 3*64; for (i = 0; i < 64; i++) { intra_matrix[i] = (!i) ? (uint16_t)8: (uint16_t)matrix[i]; intra_matrix1[i] = (intra_matrix[i]>>1); intra_matrix1[i] += ((intra_matrix[i] == 1) ? 1: 0); intra_matrix_fix[i] = FIX(intra_matrix[i]); intra_matrix_fixl[i] = FIXL(intra_matrix[i]); } } void set_inter_matrix(uint16_t * mpeg_quant_matrices, const uint8_t * matrix) { int i; uint16_t *inter_matrix = mpeg_quant_matrices + 4*64; uint16_t *inter_matrix1 = mpeg_quant_matrices + 5*64; uint16_t *inter_matrix_fix = mpeg_quant_matrices + 6*64; uint16_t *inter_matrix_fixl = mpeg_quant_matrices + 7*64; for (i = 0; i < 64; i++) { inter_matrix1[i] = ((inter_matrix[i] = (int16_t) matrix[i])>>1); inter_matrix1[i] += ((inter_matrix[i] == 1) ? 1: 0); inter_matrix_fix[i] = FIX(inter_matrix[i]); inter_matrix_fixl[i] = FIXL(inter_matrix[i]); } } void init_mpeg_matrix(uint16_t * mpeg_quant_matrices) { set_intra_matrix(mpeg_quant_matrices, default_intra_matrix); set_inter_matrix(mpeg_quant_matrices, default_inter_matrix); }