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Add extra entries to the shell code tables

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Although the current encoder uses does not use them, the decoder
might have tried to use offsets beyond the end of these tables.
Inserting values here ensures that the stream can be decoded in a
well-defined way.
The particular values of these tables were chosen to match a
Gaussian distribution with sigma=3.93.
This commit is contained in:
Timothy B. Terriberry 2011-07-30 21:24:03 -04:00 • committed by Jean-Marc Valin
parent b86d9782f1
commit 6518a836ab
2 changed files with 39 additions and 9 deletions
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6
silk/silk_tables.h
View file

@ -55,9 +55,9 @@ extern const opus_uint8 silk_rate_levels_BITS_Q5[ 2 ][ N_RATE_LEVELS - 1 ];
extern const opus_uint8 silk_max_pulses_table[ 4 ]; /* 4 */
extern const opus_uint8 silk_shell_code_table0[ 44 ]; /* 44 */
extern const opus_uint8 silk_shell_code_table1[ 65 ]; /* 65 */
extern const opus_uint8 silk_shell_code_table2[ 90 ]; /* 90 */
extern const opus_uint8 silk_shell_code_table0[ 152 ]; /* 152 */
extern const opus_uint8 silk_shell_code_table1[ 152 ]; /* 152 */
extern const opus_uint8 silk_shell_code_table2[ 152 ]; /* 152 */
extern const opus_uint8 silk_shell_code_table3[ 152 ]; /* 152 */
extern const opus_uint8 silk_shell_code_table_offsets[ MAX_PULSES + 1 ]; /* 17 */

42
silk/silk_tables_pulses_per_block.c
View file

@ -156,16 +156,29 @@ const opus_uint8 silk_rate_levels_BITS_Q5[ 2 ][ 9 ] =
}
};
const opus_uint8 silk_shell_code_table0[ 44 ] = {
const opus_uint8 silk_shell_code_table0[ 152 ] = {
128, 0, 214, 42, 0, 235, 128, 21,
0, 244, 184, 72, 11, 0, 248, 214,
128, 42, 7, 0, 248, 225, 170, 80,
25, 5, 0, 251, 236, 198, 126, 54,
18, 3, 0, 250, 238, 211, 159, 82,
35, 15, 5, 0
35, 15, 5, 0, 250, 231, 203, 168,
128, 88, 53, 25, 6, 0, 252, 238,
216, 185, 148, 108, 71, 40, 18, 4,
0, 253, 243, 225, 199, 166, 128, 90,
57, 31, 13, 3, 0, 254, 246, 233,
212, 183, 147, 109, 73, 44, 23, 10,
2, 0, 255, 250, 240, 223, 198, 166,
128, 90, 58, 33, 16, 6, 1, 0,
255, 251, 244, 231, 210, 181, 146, 110,
75, 46, 25, 12, 5, 1, 0, 255,
253, 248, 238, 221, 196, 164, 128, 92,
60, 35, 18, 8, 3, 1, 0, 255,
253, 249, 242, 229, 208, 180, 146, 110,
76, 48, 27, 14, 7, 3, 1, 0
};
const opus_uint8 silk_shell_code_table1[ 65 ] = {
const opus_uint8 silk_shell_code_table1[ 152 ] = {
129, 0, 207, 50, 0, 236, 129, 20,
0, 245, 185, 72, 10, 0, 249, 213,
129, 42, 6, 0, 250, 226, 169, 87,
@ -174,10 +187,20 @@ const opus_uint8 silk_shell_code_table1[ 65 ] = {
47, 17, 3, 0, 255, 240, 217, 182,
131, 81, 41, 11, 1, 0, 255, 254,
233, 201, 159, 107, 61, 20, 2, 1,
0
0, 255, 249, 233, 206, 170, 128, 86,
50, 23, 7, 1, 0, 255, 250, 238,
217, 186, 148, 108, 70, 39, 18, 6,
1, 0, 255, 252, 243, 226, 200, 166,
128, 90, 56, 30, 13, 4, 1, 0,
255, 252, 245, 231, 209, 180, 146, 110,
76, 47, 25, 11, 4, 1, 0, 255,
253, 248, 237, 219, 194, 163, 128, 93,
62, 37, 19, 8, 3, 1, 0, 255,
254, 250, 241, 226, 205, 177, 145, 111,
79, 51, 30, 15, 6, 2, 1, 0
};
const opus_uint8 silk_shell_code_table2[ 90 ] = {
const opus_uint8 silk_shell_code_table2[ 152 ] = {
129, 0, 203, 54, 0, 234, 129, 23,
0, 245, 184, 73, 10, 0, 250, 215,
129, 41, 5, 0, 252, 232, 173, 86,
@ -189,7 +212,14 @@ const opus_uint8 silk_shell_code_table2[ 90 ] = {
0, 255, 248, 235, 213, 179, 133, 85,
47, 19, 5, 1, 0, 255, 254, 243,
221, 194, 159, 117, 70, 37, 12, 2,
1, 0
1, 0, 255, 254, 248, 234, 208, 171,
128, 85, 48, 22, 8, 2, 1, 0,
255, 254, 250, 240, 220, 189, 149, 107,
67, 36, 16, 6, 2, 1, 0, 255,
254, 251, 243, 227, 201, 166, 128, 90,
55, 29, 13, 5, 2, 1, 0, 255,
254, 252, 246, 234, 213, 183, 147, 109,
73, 43, 22, 10, 4, 2, 1, 0
};
const opus_uint8 silk_shell_code_table3[ 152 ] = {