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quant_matrix.c
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上传用户：sun1608
上传日期：2007-02-02
资源大小：6116k
文件大小：4k
源码类别：

流媒体/Mpeg4/MP4

开发平台：

Visual C++

quant_matrix.c：源码内容
  1. #include "quant_matrix.h"
  3. #define FIX(X) (1 << 16) / (X) + 1
  5. uint8_t custom_intra_matrix = 0;
  6. uint8_t custom_inter_matrix = 0;
  8. uint8_t default_intra_matrix[64] = {
  9.      8,17,18,19,21,23,25,27,
  10.     17,18,19,21,23,25,27,28,
  11.     20,21,22,23,24,26,28,30,
  12.     21,22,23,24,26,28,30,32,
  13.     22,23,24,26,28,30,32,35,
  14.     23,24,26,28,30,32,35,38,
  15.     25,26,28,30,32,35,38,41,
  16.     27,28,30,32,35,38,41,45
  17. };
  19. int16_t intra_matrix[64] = {
  20.      8,17,18,19,21,23,25,27,
  21.     17,18,19,21,23,25,27,28,
  22.     20,21,22,23,24,26,28,30,
  23.     21,22,23,24,26,28,30,32,
  24.     22,23,24,26,28,30,32,35,
  25.     23,24,26,28,30,32,35,38,
  26.     25,26,28,30,32,35,38,41,
  27.     27,28,30,32,35,38,41,45
  28. };
  30. int16_t intra_matrix_fix[64] = {
  31.      FIX(8),FIX(17),FIX(18),FIX(19),FIX(21),FIX(23),FIX(25),FIX(27),
  32.     FIX(17),FIX(18),FIX(19),FIX(21),FIX(23),FIX(25),FIX(27),FIX(28),
  33.     FIX(20),FIX(21),FIX(22),FIX(23),FIX(24),FIX(26),FIX(28),FIX(30),
  34.     FIX(21),FIX(22),FIX(23),FIX(24),FIX(26),FIX(28),FIX(30),FIX(32),
  35.     FIX(22),FIX(23),FIX(24),FIX(26),FIX(28),FIX(30),FIX(32),FIX(35),
  36.     FIX(23),FIX(24),FIX(26),FIX(28),FIX(30),FIX(32),FIX(35),FIX(38),
  37.     FIX(25),FIX(26),FIX(28),FIX(30),FIX(32),FIX(35),FIX(38),FIX(41),
  38.     FIX(27),FIX(28),FIX(30),FIX(32),FIX(35),FIX(38),FIX(41),FIX(45)
  39. };
  41. uint8_t default_inter_matrix[64] = {
  42.     16,17,18,19,20,21,22,23,
  43.     17,18,19,20,21,22,23,24,
  44.     18,19,20,21,22,23,24,25,
  45.     19,20,21,22,23,24,26,27,
  46.     20,21,22,23,25,26,27,28,
  47.     21,22,23,24,26,27,28,30,
  48.     22,23,24,26,27,28,30,31,
  49.     23,24,25,27,28,30,31,33
  50. };
  52. int16_t inter_matrix[64] = {
  53.     16,17,18,19,20,21,22,23,
  54.     17,18,19,20,21,22,23,24,
  55.     18,19,20,21,22,23,24,25,
  56.     19,20,21,22,23,24,26,27,
  57.     20,21,22,23,25,26,27,28,
  58.     21,22,23,24,26,27,28,30,
  59.     22,23,24,26,27,28,30,31,
  60.     23,24,25,27,28,30,31,33
  61. };
  63. int16_t inter_matrix_fix[64] = {
  64.     FIX(16),FIX(17),FIX(18),FIX(19),FIX(20),FIX(21),FIX(22),FIX(23),
  65.     FIX(17),FIX(18),FIX(19),FIX(20),FIX(21),FIX(22),FIX(23),FIX(24),
  66.     FIX(18),FIX(19),FIX(20),FIX(21),FIX(22),FIX(23),FIX(24),FIX(25),
  67.     FIX(19),FIX(20),FIX(21),FIX(22),FIX(23),FIX(24),FIX(26),FIX(27),
  68.     FIX(20),FIX(21),FIX(22),FIX(23),FIX(25),FIX(26),FIX(27),FIX(28),
  69.     FIX(21),FIX(22),FIX(23),FIX(24),FIX(26),FIX(27),FIX(28),FIX(30),
  70.     FIX(22),FIX(23),FIX(24),FIX(26),FIX(27),FIX(28),FIX(30),FIX(31),
  71.     FIX(23),FIX(24),FIX(25),FIX(27),FIX(28),FIX(30),FIX(31),FIX(33)
  72. };
  74. uint8_t get_intra_matrix_status(void) {
  75. return custom_intra_matrix;
  76. }
  78. uint8_t get_inter_matrix_status(void) {
  79. return custom_inter_matrix;
  80. }
  82. void set_intra_matrix_status(uint8_t status) {
  83. custom_intra_matrix = status;
  84. }
  86. void set_inter_matrix_status(uint8_t status) {
  87. custom_inter_matrix = status;
  88. }
  90. int16_t *get_intra_matrix(void) {
  91. return intra_matrix;
  92. }
  94. int16_t *get_inter_matrix(void) {
  95. return inter_matrix;
  96. }
  98. uint8_t *get_default_intra_matrix(void) {
  99. return default_intra_matrix;
  100. }
  102. uint8_t *get_default_inter_matrix(void) {
  103. return default_inter_matrix;
  104. }
  106. uint8_t set_intra_matrix(uint8_t *matrix)
  107. {
  108. int i, change = 0;
  110. custom_intra_matrix = 0;
  112. for(i = 0; i < 64; i++) {
  113. if((int16_t) default_intra_matrix[i] != matrix[i])
  114. custom_intra_matrix = 1;
  115. if(intra_matrix[i] != matrix[i])
  116. change = 1;
  118. intra_matrix[i] = (int16_t) matrix[i];
  119. intra_matrix_fix[i] = FIX(intra_matrix[i]);
  120. }
  121. return custom_intra_matrix | change;
  122. }
  125. uint8_t set_inter_matrix(uint8_t *matrix)
  126. {
  127. int i, change = 0;
  129. custom_inter_matrix = 0;
  131. for(i = 0; i < 64; i++) {
  132. if((int16_t) default_inter_matrix[i] != matrix[i])
  133. custom_inter_matrix = 1;
  134. if(inter_matrix[i] != matrix[i])
  135. change = 1;
  137. inter_matrix[i] = (int16_t) matrix[i];
  138. inter_matrix_fix[i] = FIX(inter_matrix[i]);
  139. }
  140. return custom_inter_matrix | change;
  141. }