avformat/aviobuf: End grace period of allowing 0 from read_packet

[ffmpeg] / libavcodec / clearvideodata.h

diff --git a/libavcodec/clearvideodata.h b/libavcodec/clearvideodata.h
index d2c658eb5dbc905851a9a7f84e9563a91d41b582..37d5eb3bb5365683e73017b6408fe1e4ee826c7d 100644 (file)
--- a/libavcodec/clearvideodata.h
+++ b/libavcodec/clearvideodata.h
@@ -28,42 +28,28 @@
 #define NUM_DC_CODES 127
 #define NUM_AC_CODES 104
 
-static const uint8_t clv_dc_codes[NUM_DC_CODES] = {
-    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
-    0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
-    0x10, 0x11, 0x12, 0x13, 0x13, 0x14, 0x07, 0x0B,
-    0x0C, 0x08, 0x08, 0x09, 0x04, 0x06, 0x07, 0x05,
-    0x04, 0x05, 0x04, 0x06, 0x05, 0x06, 0x07, 0x05,
-    0x06, 0x07, 0x06, 0x07, 0x08, 0x06, 0x07, 0x08,
-    0x09, 0x0A, 0x0B, 0x07, 0x08, 0x09, 0x07, 0x08,
-    0x06, 0x07, 0x08, 0x06, 0x04, 0x05, 0x02, 0x01,
-    0x03, 0x06, 0x07, 0x07, 0x09, 0x0A, 0x0B, 0x09,
-    0x0A, 0x0B, 0x0A, 0x0B, 0x0C, 0x0D, 0x0C, 0x09,
-    0x0D, 0x0A, 0x0B, 0x08, 0x09, 0x0A, 0x0B, 0x07,
-    0x08, 0x09, 0x0A, 0x0B, 0x06, 0x07, 0x06, 0x08,
-    0x07, 0x09, 0x0A, 0x0B, 0x09, 0x0A, 0x0B, 0x0C,
-    0x14, 0x0D, 0x0D, 0x0E, 0x0F, 0x15, 0x15, 0x16,
-    0x17, 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E,
-    0x1F, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25,
+static const uint8_t clv_dc_lens[NUM_DC_CODES] = {
+    22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+    22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22,
+    21, 21, 21, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18,
+    17, 17, 17, 17, 16, 16, 16, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14,
+    13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 10, 10, 10,
+    10, 10, 10, 10, 10,  9,  9,  9,  9,  9,  9,  9,  8,  8,  8,  8,  8,  7,  7,
+     7,  7,  7,  7,  6,  6,  5,  5,  5,  5,  3,  3,  1,
 };
 
-static const uint8_t clv_dc_bits[NUM_DC_CODES] = {
-    22, 22, 22, 22, 22, 22, 22, 22,
-    22, 22, 22, 22, 22, 22, 22, 22,
-    22, 22, 22, 21, 22, 22, 19, 20,
-    20, 19, 18, 18, 15, 17, 17, 16,
-    14, 15, 12, 13, 14, 14, 14, 12,
-    12, 12, 11, 11, 11, 10, 10, 10,
-    10, 10, 10,  9,  9,  9,  8,  8,
-     7,  7,  7,  6,  5,  5,  3,  1,
-     3,  5,  5,  6,  7,  7,  7,  8,
-     8,  8,  9,  9,  9,  9, 10, 11,
-    10, 11, 11, 12, 12, 12, 12, 13,
-    14, 14, 14, 14, 15, 15, 16, 17,
-    16, 17, 18, 18, 19, 19, 19, 19,
-    21, 19, 20, 19, 19, 21, 22, 22,
-    22, 22, 22, 22, 22, 22, 22, 22,
-    22, 22, 22, 22, 22, 22, 22,
+static const uint8_t clv_dc_syms[NUM_DC_CODES] = {
+    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
+    0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12, 0x14, 0x15, 0x6E, 0x6F, 0x70,
+    0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A, 0x7B, 0x7C,
+    0x7D, 0x7E, 0x13, 0x68, 0x6D, 0x17, 0x18, 0x6A, 0x16, 0x19, 0x64, 0x65,
+    0x66, 0x67, 0x69, 0x6B, 0x6C, 0x1A, 0x1B, 0x62, 0x63, 0x1D, 0x1E, 0x5F,
+    0x61, 0x1F, 0x5E, 0x60, 0x1C, 0x21, 0x5C, 0x5D, 0x20, 0x24, 0x25, 0x26,
+    0x58, 0x59, 0x5A, 0x5B, 0x23, 0x57, 0x22, 0x27, 0x28, 0x29, 0x53, 0x54,
+    0x55, 0x56, 0x2A, 0x2B, 0x2C, 0x4F, 0x51, 0x52, 0x2D, 0x2E, 0x2F, 0x30,
+    0x31, 0x32, 0x4E, 0x50, 0x33, 0x34, 0x35, 0x4A, 0x4B, 0x4C, 0x4D, 0x36,
+    0x37, 0x47, 0x48, 0x49, 0x38, 0x39, 0x3A, 0x44, 0x45, 0x46, 0x3B, 0x43,
+    0x3C, 0x3D, 0x41, 0x42, 0x3E, 0x40, 0x3F,
 };
 
 static const uint16_t clv_ac_syms[NUM_AC_CODES] = {
@@ -111,10 +97,6 @@ static const uint8_t clv_flags_syms[][16] = {
     {  0,  8,  3,  4,  2,  1, 12,  5, 10,  7,  9,  6, 14, 11, 13, 15 }  // V_1
 };
 
-static const uint16_t clv_mv_escape[] = {
-    0x0909, 0x0A0A, 0x1010, 0x1313, 0, 0x0808, 0x0B0B, 0, 0x0808, 0x0B0B
-};
-
 static const uint8_t clv_mv_len_counts[][16] = {
     {  1,  0,  0,  2,  2,  6, 13,  6, 14, 28,  38,  38,  58,  56,  20,   8 },
     {  1,  0,  0,  2,  3,  4,  8, 10, 20, 30,  37,  63,  84,  68,  32,   0 },
@@ -126,9 +108,10 @@ static const uint8_t clv_mv_len_counts[][16] = {
     {  1,  0,  0,  0,  4,  5, 14, 18, 20, 39,   6,  80,  75, 112,  36,  32 },
 };
 
+#define MV_ESC 0x13
 static const uint16_t clv_mv_syms[] = {
     /* Y_0 motion vectors - 290 entries */
-    0x0000, 0x00FF, 0x0001, 0xFF00, 0x0100, 0x0002, 0x00FE, 0x0909, 0x00FD,
+    0x0000, 0x00FF, 0x0001, 0xFF00, 0x0100, 0x0002, 0x00FE, MV_ESC, 0x00FD,
     0x0004, 0x00FC, 0x0003, 0x01FF, 0xFF01, 0x0101, 0xFFFF, 0xFE00, 0x0200,
     0x0005, 0x00FB, 0x00FA, 0x0006, 0x0007, 0x00F9, 0xFF02, 0x0102, 0xFFFE,
     0x01FE, 0xFD00, 0x0300, 0xFC00, 0x0400, 0x02FF, 0xFE01, 0x0201, 0xFEFF,
@@ -162,7 +145,7 @@ static const uint16_t clv_mv_syms[] = {
     0x08FA, 0xF806, 0xF8FA, 0x0804, 0x08FC, 0xF804, 0xF8FC, 0x0808, 0xF8F8,
     0x08F8, 0xF808,
     /* Y_1 motion vectors - 362 entries */
-    0x0000, 0x00FF, 0x0001, 0xFF00, 0x0100, 0x0A0A, 0xFFFF, 0x01FF, 0xFF01,
+    0x0000, 0x00FF, 0x0001, 0xFF00, 0x0100, MV_ESC, 0xFFFF, 0x01FF, 0xFF01,
     0x0101, 0x00FE, 0x0002, 0x0003, 0x00FD, 0x0004, 0x00FC, 0xFE00, 0x0200,
     0x0005, 0x00FB, 0x00FA, 0x0006, 0x0007, 0x00F9, 0xFFFE, 0x01FE, 0xFF02,
     0x0102, 0xFF03, 0x0103, 0xFFFD, 0x01FD, 0xFEFF, 0x02FF, 0xFE01, 0x0201,
@@ -205,7 +188,7 @@ static const uint16_t clv_mv_syms[] = {
     0x0907, 0xF707,
     /* Y_2 motion vectors - 962 entries */
     0x0000, 0x0001, 0x00FF, 0xFF00, 0x0100, 0x0002, 0x00FE, 0x0101, 0xFFFF,
-    0x01FF, 0xFF01, 0x0003, 0x00FD, 0x0004, 0x00FC, 0x1010, 0x0005, 0x00FB,
+    0x01FF, 0xFF01, 0x0003, 0x00FD, 0x0004, 0x00FC, MV_ESC, 0x0005, 0x00FB,
     0xFE00, 0x0200, 0xFF02, 0x0102, 0xFFFE, 0x01FE, 0x00FA, 0x0006, 0x00F9,
     0x0007, 0x0201, 0xFEFF, 0x02FF, 0xFE01, 0xFD00, 0x0300, 0xFF03, 0x0103,
     0xFFFD, 0x01FD, 0xFC00, 0x0400, 0x0008, 0x00F8, 0xFB00, 0x0500, 0x0009,
@@ -314,7 +297,7 @@ static const uint16_t clv_mv_syms[] = {
     /* Y_3 motion vectors - 1370 elements */
     0x0000, 0x00FF, 0x0001, 0xFF00, 0x0100, 0x00FE, 0x0002, 0xFFFF, 0x01FF,
     0xFF01, 0x0101, 0x00FD, 0x0003, 0x00FC, 0x0004, 0xFE00, 0x0200, 0x0005,
-    0x00FB, 0x1313, 0xFFFE, 0x01FE, 0xFF02, 0x0102, 0x0006, 0x00FA, 0xFEFF,
+    0x00FB, MV_ESC, 0xFFFE, 0x01FE, 0xFF02, 0x0102, 0x0006, 0x00FA, 0xFEFF,
     0x02FF, 0xFE01, 0x0201, 0xFD00, 0x0300, 0xFC00, 0x0400, 0x00F9, 0x0007,
     0xFFFD, 0x01FD, 0xFF03, 0x0103, 0x00F8, 0x0008, 0x00F7, 0x0009, 0x000A,
     0x00F6, 0xFEFE, 0x02FE, 0xFE02, 0x0202, 0xFFFC, 0x01FC, 0xFF04, 0x0104,
@@ -468,7 +451,7 @@ static const uint16_t clv_mv_syms[] = {
     /* U_1 motion vectors - 226 entries */
     0x0001, 0x00FF, 0x0000, 0x0002, 0x00FE, 0x00FD, 0x0003, 0xFF00, 0x0100,
     0xFE00, 0x0200, 0x0101, 0xFFFF, 0x01FF, 0xFF01, 0x00FB, 0x0005, 0xFD00,
-    0x0300, 0xFC00, 0x0400, 0x0004, 0x00FC, 0x0808, 0x00FA, 0x0006, 0x0201,
+    0x0300, 0xFC00, 0x0400, 0x0004, 0x00FC, MV_ESC, 0x00FA, 0x0006, 0x0201,
     0xFEFF, 0x02FF, 0xFE01, 0xFFFD, 0x01FD, 0xFF03, 0x0103, 0xFEFD, 0x02FD,
     0xFE03, 0x0203, 0xFF02, 0x0102, 0xFFFE, 0x01FE, 0xFB00, 0x0500, 0xFDFD,
     0x03FD, 0xFD03, 0x0303, 0xFF04, 0x0104, 0xFFFC, 0x01FC, 0xFE02, 0x0202,
@@ -494,7 +477,7 @@ static const uint16_t clv_mv_syms[] = {
     0x0707,
     /* U_2 motion vectors - 442 entries */
     0x0000, 0xFF00, 0x0100, 0x00FF, 0x0001, 0xFFFF, 0x01FF, 0xFF01, 0x0101,
-    0x0B0B, 0x0002, 0x00FE, 0xFE00, 0x0200, 0x0003, 0x00FD, 0xFEFF, 0x02FF,
+    MV_ESC, 0x0002, 0x00FE, 0xFE00, 0x0200, 0x0003, 0x00FD, 0xFEFF, 0x02FF,
     0xFE01, 0x0201, 0xFF02, 0x0102, 0xFFFE, 0x01FE, 0xFD00, 0x0300, 0x00FC,
     0x0005, 0xFDFF, 0x03FF, 0xFD01, 0x0301, 0xFF03, 0x0103, 0xFFFD, 0x01FD,
     0xFE02, 0x0202, 0xFEFE, 0x02FE, 0xFCFF, 0x04FF, 0xFC01, 0x0401, 0xFBFF,
@@ -546,7 +529,7 @@ static const uint16_t clv_mv_syms[] = {
     /* V_1 motion vectors - 226 entries */
     0x0001, 0x00FF, 0x0000, 0xFF00, 0x0100, 0x0002, 0x00FE, 0x00FD, 0x0003,
     0x0004, 0x00FC, 0x00FB, 0x0005, 0x0101, 0xFFFF, 0x01FF, 0xFF01, 0xFE00,
-    0x0200, 0xFD00, 0x0300, 0x0808, 0xFF02, 0x0102, 0xFFFE, 0x01FE, 0xFC00,
+    0x0200, 0xFD00, 0x0300, MV_ESC, 0xFF02, 0x0102, 0xFFFE, 0x01FE, 0xFC00,
     0x0400, 0x0201, 0xFEFF, 0x02FF, 0xFE01, 0xFFFD, 0x01FD, 0xFF03, 0x0103,
     0x00FA, 0x0006, 0xFE02, 0x0202, 0xFEFE, 0x02FE, 0xFD02, 0x0302, 0xFDFE,
     0x03FE, 0xFEFD, 0xFC02, 0x02FD, 0x0402, 0xFE03, 0xFCFE, 0x0203, 0x04FE,
@@ -572,7 +555,7 @@ static const uint16_t clv_mv_syms[] = {
     0x0707,
     /* V_2 motion vectors - 442 elements */
     0x0000, 0x00FF, 0x0001, 0xFF00, 0x0100, 0xFFFF, 0x01FF, 0xFF01, 0x0101,
-    0x0B0B, 0xFE00, 0x0200, 0xFEFF, 0x02FF, 0xFE01, 0x0201, 0x0002, 0x00FE,
+    MV_ESC, 0xFE00, 0x0200, 0xFEFF, 0x02FF, 0xFE01, 0x0201, 0x0002, 0x00FE,
     0x00FC, 0x0003, 0x0004, 0x00FD, 0x0005, 0x00FB, 0xFDFF, 0x03FF, 0xFD01,
     0x0301, 0xFFFC, 0x01FC, 0xFF03, 0x0103, 0xFF04, 0x0104, 0xFFFD, 0x01FD,
     0xFD00, 0x0300, 0xFF02, 0x0102, 0xFFFE, 0x01FE, 0xFC00, 0x0400, 0xFEFC,
@@ -633,12 +616,13 @@ static const uint8_t clv_bias_len_counts[][16] = {
     {  1,  0,  2,  2,  2,  1,  3,  2,  4,  5,  1,  4, 10,  2,  3,  2 },
 };
 
+#define BIAS_ESC 1
 static const uint16_t clv_bias_syms[] = {
     /* Y_1 bias values - 78 entries */
     0x0000, 0xFFFC, 0x0004, 0xFFF8, 0x0008, 0xFFF4, 0x000C, 0xFFF0, 0x0010,
     0xFFEC, 0x0014, 0xFFE8, 0x0018, 0xFFE4, 0x001C, 0x0020, 0xFFE0, 0x0024,
     0xFFDC, 0x0028, 0xFFD8, 0x002C, 0xFFD4, 0x0030, 0xFFD0, 0xFFCC, 0x0034,
-    0xFFC8, 0x0038, 0x0100, 0xFFC4, 0x003C, 0xFFC0, 0x0040, 0xFFBC, 0x0044,
+    0xFFC8, 0x0038, BIAS_ESC, 0xFFC4, 0x003C, 0xFFC0, 0x0040, 0xFFBC, 0x0044,
     0xFFB8, 0x0048, 0xFFB4, 0x004C, 0xFFB0, 0x0050, 0xFFAC, 0x0054, 0xFFA8,
     0x0058, 0xFFA4, 0x005C, 0x0060, 0xFFA0, 0x0064, 0xFF9C, 0x0068, 0xFF98,
     0x006C, 0xFF94, 0x0070, 0xFF90, 0x0074, 0xFF8C, 0xFF88, 0x0078, 0x007C,
@@ -652,7 +636,7 @@ static const uint16_t clv_bias_syms[] = {
     0xFFB8, 0x004C, 0xFFB4, 0x0050, 0xFFB0, 0x0054, 0xFFAC, 0xFFA8, 0x0058,
     0x005C, 0xFFA4, 0x0060, 0xFFA0, 0x0064, 0xFF9C, 0xFF98, 0x0068, 0x006C,
     0xFF94, 0x0070, 0xFF90, 0x0074, 0xFF8C, 0xFF88, 0x0078, 0xFF84, 0x007C,
-    0xFF80, 0x0080, 0xFF7C, 0x0084, 0x0100, 0xFF78, 0x0088, 0x008C, 0xFF74,
+    0xFF80, 0x0080, 0xFF7C, 0x0084, BIAS_ESC, 0xFF78, 0x0088, 0x008C, 0xFF74,
     0x0090, 0xFF70, 0x0094, 0xFF6C, 0xFF64, 0x009C, 0xFF68, 0x0098, 0xFF60,
     0x00A0, 0xFF5C, 0x00A4, 0x00A8, 0xFF58, 0x00AC, 0xFF54, 0xFF50, 0x00B0,
     0x00B4, 0xFF4C, 0xFF48, 0x00B8, 0xFF44, 0x00BC, 0xFF40, 0x00C0,
@@ -666,33 +650,33 @@ static const uint16_t clv_bias_syms[] = {
     0xFF94, 0xFF90, 0x0070, 0xFF8C, 0x0074, 0x0078, 0xFF88, 0xFF84, 0x007C,
     0xFF80, 0x0080, 0x0084, 0xFF7C, 0x0088, 0xFF78, 0x008C, 0xFF74, 0xFF70,
     0x0090, 0x0094, 0xFF6C, 0x0098, 0xFF68, 0xFF64, 0x009C, 0xFF60, 0x00A0,
-    0xFF5C, 0x00A4, 0x0100, 0xFF58, 0x00A8, 0x00AC, 0xFF54, 0xFF50, 0x00B0,
+    0xFF5C, 0x00A4, BIAS_ESC, 0xFF58, 0x00A8, 0x00AC, 0xFF54, 0xFF50, 0x00B0,
     0xFF4C, 0x00B4, 0x00B8, 0xFF48,
     /* U_1 bias values - 42 entries */
     0x0000, 0xFFFC, 0x0004, 0xFFF8, 0x0008, 0xFFF4, 0x000C, 0xFFF0, 0x0010,
     0xFFEC, 0x0014, 0x0018, 0xFFE8, 0xFFE4, 0x001C, 0xFFE0, 0x0020, 0xFFDC,
     0x0024, 0xFFD8, 0x0028, 0x002C, 0xFFD4, 0x0030, 0xFFCC, 0xFFD0, 0x0034,
     0xFFC8, 0x0038, 0x003C, 0xFFC4, 0xFFC0, 0x0040, 0xFFBC, 0x0044, 0xFFB8,
-    0x0048, 0xFFB4, 0x004C, 0x0050, 0xFFB0, 0x0100,
+    0x0048, 0xFFB4, 0x004C, 0x0050, 0xFFB0, BIAS_ESC,
     /* U_2 bias values - 54 entries */
     0x0000, 0xFFFC, 0x0004, 0xFFF8, 0x0008, 0xFFF4, 0x000C, 0xFFF0, 0x0010,
     0x0014, 0xFFEC, 0x0018, 0xFFE8, 0x001C, 0xFFE4, 0x0020, 0xFFE0, 0xFFDC,
     0x0024, 0xFFD8, 0x0028, 0xFFD4, 0x002C, 0x0030, 0xFFD0, 0x0034, 0xFFCC,
     0x0038, 0xFFC8, 0x003C, 0xFFC4, 0x0040, 0xFFC0, 0xFFBC, 0x0044, 0xFFB4,
-    0xFFB8, 0x0048, 0x004C, 0x0100, 0x0058, 0xFFB0, 0xFFA8, 0x0054, 0xFFAC,
+    0xFFB8, 0x0048, 0x004C, BIAS_ESC, 0x0058, 0xFFB0, 0xFFA8, 0x0054, 0xFFAC,
     0x0050, 0xFF9C, 0x005C, 0xFFA0, 0x0068, 0xFF98, 0xFFA4, 0x0064, 0x0060,
     /* V_1 bias values - 42 entries */
     0x0000, 0xFFFC, 0x0004, 0xFFF8, 0x0008, 0xFFF4, 0x000C, 0xFFF0, 0x0010,
     0xFFEC, 0x0014, 0x0018, 0xFFE8, 0xFFE4, 0x001C, 0xFFE0, 0x0020, 0xFFDC,
     0x0024, 0xFFD8, 0x0028, 0x002C, 0xFFD4, 0x0030, 0xFFD0, 0xFFCC, 0x0034,
-    0xFFC8, 0x0038, 0x003C, 0xFFC4, 0x0100, 0xFFC0, 0x0040, 0xFFBC, 0x0044,
+    0xFFC8, 0x0038, 0x003C, 0xFFC4, BIAS_ESC, 0xFFC0, 0x0040, 0xFFBC, 0x0044,
     0xFFB8, 0x0048, 0xFFB4, 0x004C, 0x0050, 0xFFB0,
     /* V_2 bias values - 44 entries */
     0x0000, 0xFFFC, 0x0004, 0xFFF8, 0x0008, 0xFFF4, 0x000C, 0xFFF0, 0x0010,
     0xFFEC, 0x0014, 0xFFE8, 0x0018, 0x001C, 0xFFE4, 0xFFE0, 0x0020, 0xFFDC,
     0x0024, 0x0028, 0xFFD8, 0x002C, 0xFFD4, 0x0030, 0xFFD0, 0xFFCC, 0x0034,
     0xFFC8, 0x0038, 0x0040, 0xFFC4, 0xFFC0, 0x003C, 0x0044, 0xFFBC, 0xFFB8,
-    0x0048, 0xFFB4, 0x004C, 0x0100, 0xFFB0, 0x0054, 0xFFAC, 0x0050
+    0x0048, 0xFFB4, 0x004C, BIAS_ESC, 0xFFB0, 0x0054, 0xFFAC, 0x0050
 };
 
 #endif /* AVCODEC_CLEARVIDEODATA_H */