use VLCs for in place of get_fragment_run_length(), get_mode_code(), and

get_motion_vector_vlc()

Originally committed as revision 4266 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 70 insertions, 0 deletions

diff --git a/libavcodec/vp3data.h b/libavcodec/vp3data.h
index df80e39a16..5a5ff9cac5 100644
--- a/libavcodec/vp3data.h
+++ b/libavcodec/vp3data.h
@@ -72,6 +72,76 @@ static const uint32_t vp31_filter_limit_values[64] =
     0,  0,  0,  0,  0,  0,  0,  0
 };
 
+static const uint16_t fragment_run_length_vlc_table[30][2] = {
+    /* 1 -> 2 */
+    { 0x0, 2 },    { 0x1, 2 },
+
+    /* 3 -> 4 */
+    { 0x4, 3 },    { 0x5, 3 },
+
+    /* 5 -> 6 */
+    { 0xC, 4 },    { 0xD, 4 },
+
+    /* 7 -> 10 */
+    { 0x38, 6 },   { 0x39, 6 },
+    { 0x3A, 6 },   { 0x3B, 6 },
+
+    /* 11 -> 14 */
+    { 0x78, 7 },   { 0x79, 7 },
+    { 0x7A, 7 },   { 0x7B, 7 },
+
+    /* 15 -> 30 */
+    { 0x1F0, 9 },  { 0x1F1, 9 },  { 0x1F2, 9 },  { 0x1F3, 9 },
+    { 0x1F4, 9 },  { 0x1F5, 9 },  { 0x1F6, 9 },  { 0x1F7, 9 },
+    { 0x1F8, 9 },  { 0x1F9, 9 },  { 0x1FA, 9 },  { 0x1FB, 9 },
+    { 0x1FC, 9 },  { 0x1FD, 9 },  { 0x1FE, 9 },  { 0x1FF, 9 }
+};
+
+static const uint8_t mode_code_vlc_table[30][2] = {
+    { 0, 1 },      { 2, 2 },
+    { 6, 3 },      { 14, 4 },
+    { 30, 5 },     { 62, 6 },
+    { 126, 7 },    { 127, 7 }
+};
+
+static const uint8_t motion_vector_vlc_table[63][2] = {
+    { 0, 3 },
+    { 1, 3 },
+    { 2, 3 },
+    
+    { 6, 4 },    { 7, 4 },
+
+    { 8, 4 },    { 9, 4 },
+
+    { 40, 6 },    { 41, 6 },    { 42, 6 },    { 43, 6 },
+    { 44, 6 },    { 45, 6 },    { 46, 6 },    { 47, 6 },
+
+    { 96, 7 },    { 97, 7 },    { 98, 7 },    { 99, 7 },
+    { 100, 7 },   { 101, 7 },   { 102, 7 },   { 103, 7 },
+    { 104, 7 },   { 105, 7 },   { 106, 7 },   { 107, 7 },
+    { 108, 7 },   { 109, 7 },   { 110, 7 },   { 111, 7 },
+
+    { 0xE0, 8 },  { 0xE1, 8 },  { 0xE2, 8 },  { 0xE3, 8 },
+    { 0xE4, 8 },  { 0xE5, 8 },  { 0xE6, 8 },  { 0xE7, 8 },
+    { 0xE8, 8 },  { 0xE9, 8 },  { 0xEA, 8 },  { 0xEB, 8 },
+    { 0xEC, 8 },  { 0xED, 8 },  { 0xEE, 8 },  { 0xEF, 8 },
+
+    { 0xF0, 8 },  { 0xF1, 8 },  { 0xF2, 8 },  { 0xF3, 8 },
+    { 0xF4, 8 },  { 0xF5, 8 },  { 0xF6, 8 },  { 0xF7, 8 },
+    { 0xF8, 8 },  { 0xF9, 8 },  { 0xFA, 8 },  { 0xFB, 8 },
+    { 0xFC, 8 },  { 0xFD, 8 },  { 0xFE, 8 },  { 0xFF, 8 }
+};
+
+static const int motion_vector_table[63] = {
+    0, 1, -1,
+    2, -2,
+    3, -3,
+    4, -4, 5, -5, 6, -6, 7, -7,
+    8, -8, 9, -9, 10, -10, 11, -11, 12, -12, 13, -13, 14, -14, 15, -15,
+    16, -16, 17, -17, 18, -18, 19, -19, 20, -20, 21, -21, 22, -22, 23, -23,
+    24, -24, 25, -25, 26, -26, 27, -27, 28, -28, 29, -29, 30, -30, 31, -31
+};
+
 static const uint16_t dc_bias[16][32][2] = {
   {  /* DC bias table 0 */
     { 0x2D, 6 },