fix coverity warning CID: 255 (uninitalized variable used to build tables which arent...

[ffmpeg] / libavcodec / mpeg12data.h

diff --git a/libavcodec/mpeg12data.h b/libavcodec/mpeg12data.h
index b5ae2bcb196fd76e64f6146cce20ed2ed88bc120..a6b49aa7835faf683ffe720c95a33c9f76d17bce 100644 (file)
--- a/libavcodec/mpeg12data.h
+++ b/libavcodec/mpeg12data.h
@@ -4,14 +4,14 @@
  */
 
 const int16_t ff_mpeg1_default_intra_matrix[64] = {
-       8, 16, 19, 22, 26, 27, 29, 34,
-       16, 16, 22, 24, 27, 29, 34, 37,
-       19, 22, 26, 27, 29, 34, 34, 38,
-       22, 22, 26, 27, 29, 34, 37, 40,
-       22, 26, 27, 29, 32, 35, 40, 48,
-       26, 27, 29, 32, 35, 40, 48, 58,
-       26, 27, 29, 34, 38, 46, 56, 69,
-       27, 29, 35, 38, 46, 56, 69, 83
+        8, 16, 19, 22, 26, 27, 29, 34,
+        16, 16, 22, 24, 27, 29, 34, 37,
+        19, 22, 26, 27, 29, 34, 34, 38,
+        22, 22, 26, 27, 29, 34, 37, 40,
+        22, 26, 27, 29, 32, 35, 40, 48,
+        26, 27, 29, 32, 35, 40, 48, 58,
+        26, 27, 29, 34, 38, 46, 56, 69,
+        27, 29, 35, 38, 46, 56, 69, 83
 };
 
 const int16_t ff_mpeg1_default_non_intra_matrix[64] = {
@@ -25,29 +25,6 @@ const int16_t ff_mpeg1_default_non_intra_matrix[64] = {
     16, 16, 16, 16, 16, 16, 16, 16,
 };
 
-static const unsigned char vlc_dc_table[256] = {
-    0, 1, 2, 2,
-    3, 3, 3, 3,
-    4, 4, 4, 4, 4, 4, 4, 4,
-    5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
-    6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
-    6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
-
-    7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
-    7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
-    7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
-    7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
-
-    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-    8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
-};
-
 static const uint16_t vlc_dc_lum_code[12] = {
     0x4, 0x0, 0x1, 0x5, 0x6, 0xe, 0x1e, 0x3e, 0x7e, 0xfe, 0x1fe, 0x1ff,
 };
@@ -110,20 +87,20 @@ static const uint16_t mpeg2_vlc[113][2] = {
   {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}, {0x05, 5}, {0x07, 7}, 
-  {0xfc, 8}, {0x0c,10}, {0x14,13}, {0x07, 5}, 
-  {0x26, 8}, {0x1c,12}, {0x13,13}, {0x06, 6}, 
-  {0xfd, 8}, {0x12,12}, {0x07, 6}, {0x04, 9}, 
-  {0x12,13}, {0x06, 7}, {0x1e,12}, {0x14,16}, 
-  {0x04, 7}, {0x15,12}, {0x05, 7}, {0x11,12}, 
-  {0x78, 7}, {0x11,13}, {0x7a, 7}, {0x10,13}, 
-  {0x21, 8}, {0x1a,16}, {0x25, 8}, {0x19,16}, 
-  {0x24, 8}, {0x18,16}, {0x05, 9}, {0x17,16}, 
-  {0x07, 9}, {0x16,16}, {0x0d,10}, {0x15,16}, 
-  {0x1f,12}, {0x1a,12}, {0x19,12}, {0x17,12}, 
-  {0x16,12}, {0x1f,13}, {0x1e,13}, {0x1d,13}, 
-  {0x1c,13}, {0x1b,13}, {0x1f,16}, {0x1e,16}, 
-  {0x1d,16}, {0x1c,16}, {0x1b,16}, 
+  {0x11,16}, {0x10,16}, {0x05, 5}, {0x07, 7},
+  {0xfc, 8}, {0x0c,10}, {0x14,13}, {0x07, 5},
+  {0x26, 8}, {0x1c,12}, {0x13,13}, {0x06, 6},
+  {0xfd, 8}, {0x12,12}, {0x07, 6}, {0x04, 9},
+  {0x12,13}, {0x06, 7}, {0x1e,12}, {0x14,16},
+  {0x04, 7}, {0x15,12}, {0x05, 7}, {0x11,12},
+  {0x78, 7}, {0x11,13}, {0x7a, 7}, {0x10,13},
+  {0x21, 8}, {0x1a,16}, {0x25, 8}, {0x19,16},
+  {0x24, 8}, {0x18,16}, {0x05, 9}, {0x17,16},
+  {0x07, 9}, {0x16,16}, {0x0d,10}, {0x15,16},
+  {0x1f,12}, {0x1a,12}, {0x19,12}, {0x17,12},
+  {0x16,12}, {0x1f,13}, {0x1e,13}, {0x1d,13},
+  {0x1c,13}, {0x1b,13}, {0x1f,16}, {0x1e,16},
+  {0x1d,16}, {0x1c,16}, {0x1b,16},
   {0x01,6}, /* escape */
   {0x06,4}, /* EOB */
 };
@@ -217,7 +194,8 @@ static const uint8_t mbAddrIncrTable[36][2] = {
     {0x0, 8}, /* end (and 15 more 0 bits should follow) */
 };
 
-static const uint8_t mbPatTable[63][2] = {
+static const uint8_t mbPatTable[64][2] = {
+    {0x1, 9},
     {0xb, 5},
     {0x9, 5},
     {0xd, 6},
@@ -381,7 +359,7 @@ static const uint8_t non_linear_qscale[32] = {
     56,64,72,80,88,96,104,112,
 };
 
-uint8_t ff_mpeg1_dc_scale_table[128]={ // MN: mpeg2 really can have such large qscales?
+const uint8_t ff_mpeg1_dc_scale_table[128]={
 //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
     8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
     8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
@@ -389,12 +367,43 @@ uint8_t ff_mpeg1_dc_scale_table[128]={ // MN: mpeg2 really can have such large q
     8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
 };
 
+const static uint8_t mpeg2_dc_scale_table1[128]={
+//  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
+    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+    4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
+};
+
+static const uint8_t mpeg2_dc_scale_table2[128]={
+//  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
+    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+};
+
+static const uint8_t mpeg2_dc_scale_table3[128]={
+//  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+};
+
+static const uint8_t *mpeg2_dc_scale_table[4]={
+    ff_mpeg1_dc_scale_table,
+    mpeg2_dc_scale_table1,
+    mpeg2_dc_scale_table2,
+    mpeg2_dc_scale_table3,
+};
+
 static const float mpeg1_aspect[16]={
     0.0000,
     1.0000,
     0.6735,
     0.7031,
-    
+
     0.7615,
     0.8055,
     0.8437,