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Add tables for ESPCM_3 mode

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This commit is contained in:
Kagamiin~
2024-03-13 10:51:11 -03:00
parent f4c75226ef
commit e2200f8d75
2 changed files with 100 additions and 3 deletions
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2
src/include/86box/snd_sb_dsp.h
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@@ -153,7 +153,7 @@ typedef struct sb_dsp_t {
uint8_t espcm_range;
uint8_t espcm_byte_buffer[4];
uint8_t espcm_code_buffer[10]; /* used for ESPCM_3 */
uint8_t espcm_last_nibble; /* used for ESPCM_3 */
uint8_t espcm_last_value; /* used for ESPCM_3 */
mpu_t *mpu;
} sb_dsp_t;

101
src/sound/snd_sb_dsp.c
View File

@@ -119,7 +119,12 @@ uint8_t adjustMap2[24] = {
252, 0, 252, 0
};
uint8_t espcm_range_map[256] = {
/* Upper half only used for ESPCM_3 mode. */
/* TODO: Extract actual table (or exact ranges + range interpolation algo, whatever it is) from chip, someday, somehow.
* This current table is part software reverse engineering, part guesswork/extrapolation.
* It's close enough to what's in the chip to produce acceptable results, but not exact.
**/
uint8_t espcm_range_map[512] = {
-8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7,
-10, -8, -7, -5, -4, -3, -2, -1, 0, 2, 3, 4, 5, 6, 8, 9,
-12, -11, -9, -8, -6, -5, -3, -2, 0, 2, 3, 5, 6, 8, 10, 11,
@@ -135,7 +140,99 @@ uint8_t espcm_range_map[256] = {
-85, -74, -64, -53, -43, -32, -22, -11, 0, 11, 22, 33, 43, 54, 64, 75,
-102, -98, -85, -71, -58, -45, -31, -14, 0, 13, 26, 39, 52, 65, 78, 90,
-127,-112, -96, -80, -64, -48, -32, -16, 0, 16, 32, 48, 64, 80, 96, 112,
-128,-127,-109, -91, -73, -54, -36, -18, 0, 18, 36, 54, 73, 91, 109, 127
-128,-127,-109, -91, -73, -54, -36, -18, 0, 18, 36, 54, 73, 91, 109, 127,
-8, -7, -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7,
-10, -9, -8, -6, -5, -4, -3, -2, -1, 1, 2, 3, 4, 6, 7, 8,
-13, -11, -9, -7, -6, -5, -3, -2, -1, 2, 3, 5, 6, 7, 9, 10,
-15, -13, -12, -10, -8, -6, -5, -3, -1, 2, 3, 5, 6, 8, 10, 12,
-18, -15, -13, -11, -9, -7, -5, -3, -1, 2, 3, 5, 7, 9, 11, 13,
-24, -20, -17, -15, -12, -10, -7, -5, -2, 2, 3, 6, 8, 11, 13, 16,
-29, -26, -23, -19, -16, -13, -10, -6, -2, 2, 5, 8, 11, 15, 18, 22,
-34, -30, -26, -22, -18, -14, -10, -6, -2, 2, 6, 10, 14, 18, 22, 26,
-43, -38, -33, -28, -23, -18, -13, -8, -3, 2, 7, 12, 17, 22, 27, 32,
-51, -45, -39, -33, -27, -21, -15, -9, -3, 3, 9, 15, 21, 27, 33, 39,
-60, -53, -46, -39, -32, -25, -18, -11, -4, 3, 10, 17, 24, 31, 38, 45,
-77, -68, -59, -50, -41, -32, -23, -14, -5, 4, 13, 22, 31, 40, 49, 58,
-90, -80, -69, -59, -48, -38, -27, -17, -6, 5, 16, 27, 38, 48, 59, 69,
-112,-104, -91, -78, -65, -52, -38, -23, -7, 6, 19, 32, 45, 58, 71, 84,
-128,-120,-104, -88, -72, -56, -40, -24, -8, 8, 24, 40, 56, 72, 88, 104,
-128,-128,-118,-100, -82, -64, -45, -27, -9, 9, 27, 45, 63, 82, 100, 118
};
/* address = table_index(9:8) | dsp->espcm_last_value(7:3) | codeword(2:0)
* the value is a base index into espcm_range_map with bits at (8, 3:0),
* to be OR'ed with dsp->espcm_range at (7:4)
*/
uint16_t espcm3_dpcm_tables[1024] =
{
/* Table 0 */
256, 257, 258, 259, 260, 263, 266, 269, 0, 257, 258, 259, 260, 263, 266, 269,
0, 1, 258, 259, 260, 263, 266, 269, 1, 2, 259, 260, 261, 263, 266, 269,
1, 3, 260, 261, 262, 264, 266, 269, 1, 3, 4, 261, 262, 264, 266, 269,
2, 4, 5, 262, 263, 264, 266, 269, 2, 4, 6, 263, 264, 265, 267, 269,
2, 4, 6, 7, 264, 265, 267, 269, 2, 5, 7, 8, 265, 266, 267, 269,
2, 5, 7, 8, 9, 266, 268, 270, 2, 5, 7, 9, 10, 267, 268, 270,
2, 5, 8, 10, 11, 268, 269, 270, 2, 5, 8, 11, 12, 269, 270, 271,
2, 5, 8, 11, 12, 13, 270, 271, 2, 5, 8, 11, 12, 13, 14, 271,
0, 257, 258, 259, 260, 263, 266, 269, 0, 1, 258, 259, 260, 263, 266, 269,
0, 1, 2, 259, 260, 263, 266, 269, 1, 2, 3, 260, 261, 263, 266, 269,
1, 3, 4, 261, 262, 264, 266, 269, 1, 3, 5, 262, 263, 264, 266, 269,
2, 4, 5, 6, 263, 264, 266, 269, 2, 4, 6, 7, 264, 265, 267, 269,
2, 4, 6, 7, 8, 265, 267, 269, 2, 5, 7, 8, 9, 266, 267, 269,
2, 5, 7, 9, 10, 267, 268, 270, 2, 5, 7, 9, 10, 11, 268, 270,
2, 5, 8, 10, 11, 12, 269, 270, 2, 5, 8, 11, 12, 13, 270, 271,
2, 5, 8, 11, 12, 13, 14, 271, 2, 5, 8, 11, 12, 13, 14, 15,
/* Table 1 */
257, 260, 262, 263, 264, 265, 267, 270, 257, 260, 262, 263, 264, 265, 267, 270,
1, 260, 262, 263, 264, 265, 267, 270, 1, 260, 262, 263, 264, 265, 267, 270,
1, 260, 262, 263, 264, 265, 267, 270, 1, 4, 262, 263, 264, 265, 267, 270,
1, 4, 262, 263, 264, 265, 267, 270, 1, 4, 6, 263, 264, 265, 267, 270,
1, 4, 6, 7, 264, 265, 267, 270, 1, 4, 6, 7, 8, 265, 267, 270,
1, 4, 6, 7, 8, 9, 267, 270, 1, 4, 6, 7, 8, 9, 267, 270,
1, 4, 6, 7, 8, 9, 11, 270, 1, 4, 6, 7, 8, 9, 11, 270,
1, 4, 6, 7, 8, 9, 11, 270, 1, 4, 6, 7, 8, 9, 11, 14,
257, 260, 262, 263, 264, 265, 267, 270, 1, 260, 262, 263, 264, 265, 267, 270,
1, 260, 262, 263, 264, 265, 267, 270, 1, 260, 262, 263, 264, 265, 267, 270,
1, 4, 262, 263, 264, 265, 267, 270, 1, 4, 262, 263, 264, 265, 267, 270,
1, 4, 6, 263, 264, 265, 267, 270, 1, 4, 6, 7, 264, 265, 267, 270,
1, 4, 6, 7, 8, 265, 267, 270, 1, 4, 6, 7, 8, 9, 267, 270,
1, 4, 6, 7, 8, 9, 267, 270, 1, 4, 6, 7, 8, 9, 11, 270,
1, 4, 6, 7, 8, 9, 11, 270, 1, 4, 6, 7, 8, 9, 11, 270,
1, 4, 6, 7, 8, 9, 11, 14, 1, 4, 6, 7, 8, 9, 11, 14,
/* Table 2 */
256, 257, 258, 259, 260, 262, 265, 268, 0, 257, 258, 259, 260, 262, 265, 268,
0, 1, 258, 259, 260, 262, 265, 269, 1, 2, 259, 260, 261, 263, 265, 269,
1, 3, 260, 261, 262, 263, 265, 269, 1, 3, 4, 261, 262, 263, 265, 269,
1, 3, 5, 262, 263, 264, 266, 269, 1, 4, 5, 6, 263, 264, 266, 269,
1, 4, 6, 7, 264, 265, 266, 269, 1, 4, 6, 7, 8, 265, 266, 269,
2, 4, 6, 7, 8, 9, 267, 269, 2, 4, 6, 7, 8, 9, 267, 269,
2, 5, 7, 8, 9, 10, 11, 270, 2, 5, 7, 8, 9, 10, 11, 270,
2, 5, 8, 9, 10, 11, 12, 270, 2, 6, 8, 10, 11, 12, 13, 14,
257, 258, 259, 260, 261, 263, 265, 269, 1, 259, 260, 261, 262, 263, 266, 269,
1, 260, 261, 262, 263, 264, 266, 269, 1, 260, 261, 262, 263, 264, 266, 269,
2, 4, 262, 263, 264, 265, 267, 269, 2, 4, 262, 263, 264, 265, 267, 269,
2, 5, 6, 263, 264, 265, 267, 270, 2, 5, 6, 7, 264, 265, 267, 270,
2, 5, 7, 8, 265, 266, 267, 270, 2, 5, 7, 8, 9, 266, 268, 270,
2, 6, 8, 9, 10, 267, 268, 270, 2, 6, 8, 9, 10, 11, 268, 270,
2, 6, 8, 10, 11, 12, 269, 270, 2, 6, 9, 11, 12, 13, 270, 271,
3, 6, 9, 11, 12, 13, 14, 271, 3, 6, 9, 11, 12, 13, 14, 15,
/* Table 3 */
256, 258, 260, 261, 262, 263, 264, 265, 0, 258, 260, 261, 262, 263, 264, 265,
1, 259, 260, 261, 262, 263, 264, 266, 1, 259, 260, 261, 262, 263, 264, 266,
1, 3, 260, 261, 262, 263, 264, 266, 1, 3, 4, 261, 262, 263, 264, 267,
1, 3, 4, 5, 262, 263, 264, 267, 1, 3, 4, 5, 6, 263, 264, 267,
1, 3, 5, 6, 7, 264, 265, 268, 1, 3, 5, 6, 7, 8, 265, 268,
1, 4, 6, 7, 8, 9, 266, 269, 1, 4, 6, 7, 8, 9, 10, 269,
1, 4, 6, 7, 8, 9, 10, 269, 1, 4, 6, 7, 8, 9, 11, 270,
1, 4, 6, 7, 8, 9, 11, 270, 1, 4, 6, 7, 8, 9, 11, 14,
257, 260, 262, 263, 264, 265, 267, 270, 1, 260, 262, 263, 264, 265, 267, 270,
1, 260, 262, 263, 264, 265, 267, 270, 2, 261, 262, 263, 264, 265, 267, 270,
2, 261, 262, 263, 264, 265, 267, 270, 2, 5, 262, 263, 264, 265, 267, 270,
3, 6, 263, 264, 265, 266, 268, 270, 3, 6, 7, 264, 265, 266, 268, 270,
4, 7, 8, 265, 266, 267, 268, 270, 4, 7, 8, 9, 266, 267, 268, 270,
4, 7, 8, 9, 10, 267, 268, 270, 5, 7, 8, 9, 10, 11, 268, 270,
5, 7, 8, 9, 10, 11, 12, 270, 5, 7, 8, 9, 10, 11, 12, 270,
6, 7, 8, 9, 10, 11, 13, 271, 6, 7, 8, 9, 10, 11, 13, 15
};
double low_fir_sb16_coef[4][SB16_NCoef];