int a52_downmix_init (int input, int flags, level_t * level,
level_t clev, level_t slev)
{
static uint8_t table[11][8] = {
{A52_CHANNEL, A52_DOLBY, A52_STEREO, A52_STEREO,
A52_STEREO, A52_STEREO, A52_STEREO, A52_STEREO},
{A52_MONO, A52_MONO, A52_MONO, A52_MONO,
A52_MONO, A52_MONO, A52_MONO, A52_MONO},
{A52_CHANNEL, A52_DOLBY, A52_STEREO, A52_STEREO,
A52_STEREO, A52_STEREO, A52_STEREO, A52_STEREO},
{A52_CHANNEL, A52_DOLBY, A52_STEREO, A52_3F,
A52_STEREO, A52_3F, A52_STEREO, A52_3F},
{A52_CHANNEL, A52_DOLBY, A52_STEREO, A52_STEREO,
A52_2F1R, A52_2F1R, A52_2F1R, A52_2F1R},
{A52_CHANNEL, A52_DOLBY, A52_STEREO, A52_STEREO,
A52_2F1R, A52_3F1R, A52_2F1R, A52_3F1R},
{A52_CHANNEL, A52_DOLBY, A52_STEREO, A52_3F,
A52_2F2R, A52_2F2R, A52_2F2R, A52_2F2R},
{A52_CHANNEL, A52_DOLBY, A52_STEREO, A52_3F,
A52_2F2R, A52_3F2R, A52_2F2R, A52_3F2R},
{A52_CHANNEL1, A52_MONO, A52_MONO, A52_MONO,
A52_MONO, A52_MONO, A52_MONO, A52_MONO},
{A52_CHANNEL2, A52_MONO, A52_MONO, A52_MONO,
A52_MONO, A52_MONO, A52_MONO, A52_MONO},
{A52_CHANNEL, A52_DOLBY, A52_STEREO, A52_DOLBY,
A52_DOLBY, A52_DOLBY, A52_DOLBY, A52_DOLBY}
};
int output;
output = flags & A52_CHANNEL_MASK;
if (output > A52_DOLBY)
return -1;
output = table[output][input & 7];
if (output == A52_STEREO &&
(input == A52_DOLBY || (input == A52_3F && clev == LEVEL (LEVEL_3DB))))
output = A52_DOLBY;
if (flags & A52_ADJUST_LEVEL) {
level_t adjust;
switch (CONVERT (input & 7, output)) {
case CONVERT (A52_3F, A52_MONO):
adjust = DIV (LEVEL_3DB, LEVEL (1) + clev);
break;
case CONVERT (A52_STEREO, A52_MONO):
case CONVERT (A52_2F2R, A52_2F1R):
case CONVERT (A52_3F2R, A52_3F1R):
level_3db:
adjust = LEVEL (LEVEL_3DB);
break;
case CONVERT (A52_3F2R, A52_2F1R):
if (clev < LEVEL (LEVEL_PLUS3DB - 1))
goto level_3db;
/* break thru */
case CONVERT (A52_3F, A52_STEREO):
case CONVERT (A52_3F1R, A52_2F1R):
case CONVERT (A52_3F1R, A52_2F2R):
case CONVERT (A52_3F2R, A52_2F2R):
adjust = DIV (1, LEVEL (1) + clev);
break;
case CONVERT (A52_2F1R, A52_MONO):
adjust = DIV (LEVEL_PLUS3DB, LEVEL (2) + slev);
break;
case CONVERT (A52_2F1R, A52_STEREO):
case CONVERT (A52_3F1R, A52_3F):
adjust = DIV (1, LEVEL (1) + MUL_C (slev, LEVEL_3DB));
break;
case CONVERT (A52_3F1R, A52_MONO):
adjust = DIV (LEVEL_3DB, LEVEL (1) + clev + MUL_C (slev, 0.5));
break;
case CONVERT (A52_3F1R, A52_STEREO):
adjust = DIV (1, LEVEL (1) + clev + MUL_C (slev, LEVEL_3DB));
break;
case CONVERT (A52_2F2R, A52_MONO):
adjust = DIV (LEVEL_3DB, LEVEL (1) + slev);
break;
case CONVERT (A52_2F2R, A52_STEREO):
case CONVERT (A52_3F2R, A52_3F):
adjust = DIV (1, LEVEL (1) + slev);
break;
case CONVERT (A52_3F2R, A52_MONO):
adjust = DIV (LEVEL_3DB, LEVEL (1) + clev + slev);
break;
case CONVERT (A52_3F2R, A52_STEREO):
adjust = DIV (1, LEVEL (1) + clev + slev);
break;
case CONVERT (A52_MONO, A52_DOLBY):
adjust = LEVEL (LEVEL_PLUS3DB);
break;
case CONVERT (A52_3F, A52_DOLBY):
case CONVERT (A52_2F1R, A52_DOLBY):
adjust = LEVEL (1 / (1 + LEVEL_3DB));
break;
case CONVERT (A52_3F1R, A52_DOLBY):
case CONVERT (A52_2F2R, A52_DOLBY):
adjust = LEVEL (1 / (1 + 2 * LEVEL_3DB));
break;
case CONVERT (A52_3F2R, A52_DOLBY):
adjust = LEVEL (1 / (1 + 3 * LEVEL_3DB));
break;
default:
return output;
}
*level = MUL_L (*level, adjust);
}
return output;
}
int dts_downmix_init (int input, int flags, level_t * level,
level_t clev, level_t slev)
{
static uint8_t table[11][10] = {
/* DTS_MONO */
{DTS_MONO, DTS_MONO, DTS_MONO, DTS_MONO,
DTS_MONO, DTS_MONO, DTS_MONO, DTS_MONO,
DTS_MONO, DTS_MONO},
/* DTS_CHANNEL */
{DTS_MONO, DTS_CHANNEL, DTS_STEREO, DTS_STEREO,
DTS_STEREO, DTS_STEREO, DTS_STEREO, DTS_STEREO,
DTS_STEREO, DTS_STEREO},
/* DTS_STEREO */
{DTS_MONO, DTS_CHANNEL, DTS_STEREO, DTS_STEREO,
DTS_STEREO, DTS_STEREO, DTS_STEREO, DTS_STEREO,
DTS_STEREO, DTS_STEREO},
/* DTS_STEREO_SUMDIFF */
{DTS_MONO, DTS_CHANNEL, DTS_STEREO, DTS_STEREO,
DTS_STEREO, DTS_STEREO, DTS_STEREO, DTS_STEREO,
DTS_STEREO, DTS_STEREO},
/* DTS_STEREO_TOTAL */
{DTS_MONO, DTS_CHANNEL, DTS_STEREO, DTS_STEREO,
DTS_STEREO, DTS_STEREO, DTS_STEREO, DTS_STEREO,
DTS_STEREO, DTS_STEREO},
/* DTS_3F */
{DTS_MONO, DTS_CHANNEL, DTS_STEREO, DTS_STEREO,
DTS_STEREO, DTS_3F, DTS_3F, DTS_3F,
DTS_3F, DTS_3F},
/* DTS_2F1R */
{DTS_MONO, DTS_CHANNEL, DTS_STEREO, DTS_STEREO,
DTS_STEREO, DTS_2F1R, DTS_2F1R, DTS_2F1R,
DTS_2F1R, DTS_2F1R},
/* DTS_3F1R */
{DTS_MONO, DTS_CHANNEL, DTS_STEREO, DTS_STEREO,
DTS_STEREO, DTS_3F, DTS_3F1R, DTS_3F1R,
DTS_3F1R, DTS_3F1R},
/* DTS_2F2R */
{DTS_MONO, DTS_CHANNEL, DTS_STEREO, DTS_STEREO,
DTS_STEREO, DTS_STEREO, DTS_2F2R, DTS_2F2R,
DTS_2F2R, DTS_2F2R},
/* DTS_3F2R */
{DTS_MONO, DTS_CHANNEL, DTS_STEREO, DTS_STEREO,
DTS_STEREO, DTS_3F, DTS_3F2R, DTS_3F2R,
DTS_3F2R, DTS_3F2R},
/* DTS_4F2R */
{DTS_MONO, DTS_CHANNEL, DTS_STEREO, DTS_STEREO,
DTS_STEREO, DTS_4F2R, DTS_4F2R, DTS_4F2R,
DTS_4F2R, DTS_4F2R},
};
int output;
output = flags & DTS_CHANNEL_MASK;
if (output > DTS_CHANNEL_MAX)
return -1;
output = table[output][input];
if (output == DTS_STEREO &&
(input == DTS_DOLBY || (input == DTS_3F && clev == LEVEL (LEVEL_3DB))))
output = DTS_DOLBY;
if (flags & DTS_ADJUST_LEVEL) {
level_t adjust;
switch (CONVERT (input & 7, output)) {
case CONVERT (DTS_3F, DTS_MONO):
adjust = (sample_t)(DIV (LEVEL_3DB, LEVEL (1) + clev));
break;
case CONVERT (DTS_STEREO, DTS_MONO):
case CONVERT (DTS_2F2R, DTS_2F1R):
case CONVERT (DTS_3F2R, DTS_3F1R):
level_3db:
adjust = (sample_t)(LEVEL (LEVEL_3DB));
break;
case CONVERT (DTS_3F2R, DTS_2F1R):
if (clev < LEVEL (LEVEL_PLUS3DB - 1))
goto level_3db;
/* break thru */
case CONVERT (DTS_3F, DTS_STEREO):
case CONVERT (DTS_3F1R, DTS_2F1R):
case CONVERT (DTS_3F1R, DTS_2F2R):
case CONVERT (DTS_3F2R, DTS_2F2R):
adjust = DIV (1, LEVEL (1) + clev);
break;
case CONVERT (DTS_2F1R, DTS_MONO):
adjust = (sample_t)(DIV (LEVEL_PLUS3DB, LEVEL (2) + slev));
break;
case CONVERT (DTS_2F1R, DTS_STEREO):
case CONVERT (DTS_3F1R, DTS_3F):
adjust = (sample_t)(DIV (1, LEVEL (1) + MUL_C (slev, LEVEL_3DB)));
break;
case CONVERT (DTS_3F1R, DTS_MONO):
adjust = (sample_t)(DIV (LEVEL_3DB, LEVEL (1) + clev + MUL_C (slev, 0.5)));
break;
case CONVERT (DTS_3F1R, DTS_STEREO):
adjust = (sample_t)(DIV (1, LEVEL (1) + clev + MUL_C (slev, LEVEL_3DB)));
break;
case CONVERT (DTS_2F2R, DTS_MONO):
adjust = (sample_t)(DIV (LEVEL_3DB, LEVEL (1) + slev));
break;
case CONVERT (DTS_2F2R, DTS_STEREO):
case CONVERT (DTS_3F2R, DTS_3F):
adjust = DIV (1, LEVEL (1) + slev);
break;
case CONVERT (DTS_3F2R, DTS_MONO):
adjust = (sample_t)(DIV (LEVEL_3DB, LEVEL (1) + clev + slev));
break;
case CONVERT (DTS_3F2R, DTS_STEREO):
adjust = DIV (1, LEVEL (1) + clev + slev);
break;
case CONVERT (DTS_MONO, DTS_DOLBY):
adjust = (sample_t)(LEVEL (LEVEL_PLUS3DB));
break;
case CONVERT (DTS_3F, DTS_DOLBY):
case CONVERT (DTS_2F1R, DTS_DOLBY):
adjust = (sample_t)(LEVEL (1 / (1 + LEVEL_3DB)));
break;
case CONVERT (DTS_3F1R, DTS_DOLBY):
case CONVERT (DTS_2F2R, DTS_DOLBY):
adjust = (sample_t)(LEVEL (1 / (1 + 2 * LEVEL_3DB)));
break;
case CONVERT (DTS_3F2R, DTS_DOLBY):
adjust = (sample_t)(LEVEL (1 / (1 + 3 * LEVEL_3DB)));
break;
default:
return output;
}
*level = MUL_L (*level, adjust);
}
return output;
}
int a52_downmix_coeff (level_t * coeff, int acmod, int output, level_t level,
level_t clev, level_t slev)
{
level_t level_3db;
level_3db = MUL_C (level, LEVEL_3DB);
switch (CONVERT (acmod, output & A52_CHANNEL_MASK)) {
case CONVERT (A52_CHANNEL, A52_CHANNEL):
case CONVERT (A52_MONO, A52_MONO):
case CONVERT (A52_STEREO, A52_STEREO):
case CONVERT (A52_3F, A52_3F):
case CONVERT (A52_2F1R, A52_2F1R):
case CONVERT (A52_3F1R, A52_3F1R):
case CONVERT (A52_2F2R, A52_2F2R):
case CONVERT (A52_3F2R, A52_3F2R):
case CONVERT (A52_STEREO, A52_DOLBY):
coeff[0] = coeff[1] = coeff[2] = coeff[3] = coeff[4] = level;
return 0;
case CONVERT (A52_CHANNEL, A52_MONO):
coeff[0] = coeff[1] = MUL_C (level, LEVEL_6DB);
return 3;
case CONVERT (A52_STEREO, A52_MONO):
coeff[0] = coeff[1] = level_3db;
return 3;
case CONVERT (A52_3F, A52_MONO):
coeff[0] = coeff[2] = level_3db;
coeff[1] = MUL_C (MUL_L (level_3db, clev), LEVEL_PLUS6DB);
return 7;
case CONVERT (A52_2F1R, A52_MONO):
coeff[0] = coeff[1] = level_3db;
coeff[2] = MUL_L (level_3db, slev);
return 7;
case CONVERT (A52_2F2R, A52_MONO):
coeff[0] = coeff[1] = level_3db;
coeff[2] = coeff[3] = MUL_L (level_3db, slev);
return 15;
case CONVERT (A52_3F1R, A52_MONO):
coeff[0] = coeff[2] = level_3db;
coeff[1] = MUL_C (MUL_L (level_3db, clev), LEVEL_PLUS6DB);
coeff[3] = MUL_L (level_3db, slev);
return 15;
case CONVERT (A52_3F2R, A52_MONO):
coeff[0] = coeff[2] = level_3db;
coeff[1] = MUL_C (MUL_L (level_3db, clev), LEVEL_PLUS6DB);
coeff[3] = coeff[4] = MUL_L (level_3db, slev);
return 31;
case CONVERT (A52_MONO, A52_DOLBY):
coeff[0] = level_3db;
return 0;
case CONVERT (A52_3F, A52_DOLBY):
coeff[0] = coeff[2] = coeff[3] = coeff[4] = level;
coeff[1] = level_3db;
return 7;
case CONVERT (A52_3F, A52_STEREO):
case CONVERT (A52_3F1R, A52_2F1R):
case CONVERT (A52_3F2R, A52_2F2R):
coeff[0] = coeff[2] = coeff[3] = coeff[4] = level;
coeff[1] = MUL_L (level, clev);
return 7;
case CONVERT (A52_2F1R, A52_DOLBY):
coeff[0] = coeff[1] = level;
coeff[2] = level_3db;
return 7;
case CONVERT (A52_2F1R, A52_STEREO):
coeff[0] = coeff[1] = level;
coeff[2] = MUL_L (level_3db, slev);
return 7;
case CONVERT (A52_3F1R, A52_DOLBY):
coeff[0] = coeff[2] = level;
coeff[1] = coeff[3] = level_3db;
return 15;
case CONVERT (A52_3F1R, A52_STEREO):
coeff[0] = coeff[2] = level;
coeff[1] = MUL_L (level, clev);
coeff[3] = MUL_L (level_3db, slev);
return 15;
case CONVERT (A52_2F2R, A52_DOLBY):
coeff[0] = coeff[1] = level;
coeff[2] = coeff[3] = level_3db;
return 15;
case CONVERT (A52_2F2R, A52_STEREO):
coeff[0] = coeff[1] = level;
coeff[2] = coeff[3] = MUL_L (level, slev);
return 15;
case CONVERT (A52_3F2R, A52_DOLBY):
coeff[0] = coeff[2] = level;
coeff[1] = coeff[3] = coeff[4] = level_3db;
return 31;
case CONVERT (A52_3F2R, A52_2F1R):
coeff[0] = coeff[2] = level;
coeff[1] = MUL_L (level, clev);
coeff[3] = coeff[4] = level_3db;
return 31;
case CONVERT (A52_3F2R, A52_STEREO):
coeff[0] = coeff[2] = level;
coeff[1] = MUL_L (level, clev);
coeff[3] = coeff[4] = MUL_L (level, slev);
return 31;
case CONVERT (A52_3F1R, A52_3F):
coeff[0] = coeff[1] = coeff[2] = level;
coeff[3] = MUL_L (level_3db, slev);
return 13;
case CONVERT (A52_3F2R, A52_3F):
coeff[0] = coeff[1] = coeff[2] = level;
coeff[3] = coeff[4] = MUL_L (level, slev);
return 29;
case CONVERT (A52_2F2R, A52_2F1R):
coeff[0] = coeff[1] = level;
coeff[2] = coeff[3] = level_3db;
return 12;
case CONVERT (A52_3F2R, A52_3F1R):
coeff[0] = coeff[1] = coeff[2] = level;
coeff[3] = coeff[4] = level_3db;
return 24;
case CONVERT (A52_2F1R, A52_2F2R):
coeff[0] = coeff[1] = level;
coeff[2] = level_3db;
return 0;
case CONVERT (A52_3F1R, A52_2F2R):
coeff[0] = coeff[2] = level;
coeff[1] = MUL_L (level, clev);
coeff[3] = level_3db;
return 7;
case CONVERT (A52_3F1R, A52_3F2R):
coeff[0] = coeff[1] = coeff[2] = level;
coeff[3] = level_3db;
return 0;
case CONVERT (A52_CHANNEL, A52_CHANNEL1):
coeff[0] = level;
coeff[1] = 0;
return 0;
case CONVERT (A52_CHANNEL, A52_CHANNEL2):
coeff[0] = 0;
coeff[1] = level;
return 0;
}
return -1; /* NOTREACHED */
}
int dts_downmix_coeff (level_t * coeff, int acmod, int output, level_t level,
level_t clev, level_t slev)
{
level_t level_3db;
level_3db = (sample_t)(MUL_C (level, LEVEL_3DB));
switch (CONVERT (acmod, output & DTS_CHANNEL_MASK)) {
case CONVERT (DTS_CHANNEL, DTS_CHANNEL):
case CONVERT (DTS_MONO, DTS_MONO):
case CONVERT (DTS_STEREO, DTS_STEREO):
case CONVERT (DTS_3F, DTS_3F):
case CONVERT (DTS_2F1R, DTS_2F1R):
case CONVERT (DTS_3F1R, DTS_3F1R):
case CONVERT (DTS_2F2R, DTS_2F2R):
case CONVERT (DTS_3F2R, DTS_3F2R):
case CONVERT (DTS_STEREO, DTS_DOLBY):
coeff[0] = coeff[1] = coeff[2] = coeff[3] = coeff[4] = level;
return 0;
case CONVERT (DTS_CHANNEL, DTS_MONO):
coeff[0] = coeff[1] = (sample_t)(MUL_C (level, LEVEL_6DB));
return 3;
case CONVERT (DTS_STEREO, DTS_MONO):
coeff[0] = coeff[1] = level_3db;
return 3;
case CONVERT (DTS_3F, DTS_MONO):
coeff[0] = coeff[2] = level_3db;
coeff[1] = (sample_t)(MUL_C (MUL_L (level_3db, clev), LEVEL_PLUS6DB));
return 7;
case CONVERT (DTS_2F1R, DTS_MONO):
coeff[0] = coeff[1] = level_3db;
coeff[2] = MUL_L (level_3db, slev);
return 7;
case CONVERT (DTS_2F2R, DTS_MONO):
coeff[0] = coeff[1] = level_3db;
coeff[2] = coeff[3] = MUL_L (level_3db, slev);
return 15;
case CONVERT (DTS_3F1R, DTS_MONO):
coeff[0] = coeff[2] = level_3db;
coeff[1] = (sample_t)(MUL_C (MUL_L (level_3db, clev), LEVEL_PLUS6DB));
coeff[3] = MUL_L (level_3db, slev);
return 15;
case CONVERT (DTS_3F2R, DTS_MONO):
coeff[0] = coeff[2] = level_3db;
coeff[1] = (sample_t)(MUL_C (MUL_L (level_3db, clev), LEVEL_PLUS6DB));
coeff[3] = coeff[4] = MUL_L (level_3db, slev);
return 31;
case CONVERT (DTS_MONO, DTS_DOLBY):
coeff[0] = level_3db;
return 0;
case CONVERT (DTS_3F, DTS_DOLBY):
coeff[0] = coeff[2] = coeff[3] = coeff[4] = level;
coeff[1] = level_3db;
return 7;
case CONVERT (DTS_3F, DTS_STEREO):
case CONVERT (DTS_3F1R, DTS_2F1R):
case CONVERT (DTS_3F2R, DTS_2F2R):
coeff[0] = coeff[2] = coeff[3] = coeff[4] = level;
coeff[1] = MUL_L (level, clev);
return 7;
case CONVERT (DTS_2F1R, DTS_DOLBY):
coeff[0] = coeff[1] = level;
coeff[2] = level_3db;
return 7;
case CONVERT (DTS_2F1R, DTS_STEREO):
coeff[0] = coeff[1] = level;
coeff[2] = MUL_L (level_3db, slev);
return 7;
case CONVERT (DTS_3F1R, DTS_DOLBY):
coeff[0] = coeff[2] = level;
coeff[1] = coeff[3] = level_3db;
return 15;
case CONVERT (DTS_3F1R, DTS_STEREO):
coeff[0] = coeff[2] = level;
coeff[1] = MUL_L (level, clev);
coeff[3] = MUL_L (level_3db, slev);
return 15;
case CONVERT (DTS_2F2R, DTS_DOLBY):
coeff[0] = coeff[1] = level;
coeff[2] = coeff[3] = level_3db;
return 15;
case CONVERT (DTS_2F2R, DTS_STEREO):
coeff[0] = coeff[1] = level;
coeff[2] = coeff[3] = MUL_L (level, slev);
return 15;
case CONVERT (DTS_3F2R, DTS_DOLBY):
coeff[0] = coeff[2] = level;
coeff[1] = coeff[3] = coeff[4] = level_3db;
return 31;
case CONVERT (DTS_3F2R, DTS_2F1R):
coeff[0] = coeff[2] = level;
coeff[1] = MUL_L (level, clev);
coeff[3] = coeff[4] = level_3db;
return 31;
case CONVERT (DTS_3F2R, DTS_STEREO):
coeff[0] = coeff[2] = level;
coeff[1] = MUL_L (level, clev);
coeff[3] = coeff[4] = MUL_L (level, slev);
return 31;
case CONVERT (DTS_3F1R, DTS_3F):
coeff[0] = coeff[1] = coeff[2] = level;
coeff[3] = MUL_L (level_3db, slev);
return 13;
case CONVERT (DTS_3F2R, DTS_3F):
coeff[0] = coeff[1] = coeff[2] = level;
coeff[3] = coeff[4] = MUL_L (level, slev);
return 29;
case CONVERT (DTS_2F2R, DTS_2F1R):
coeff[0] = coeff[1] = level;
coeff[2] = coeff[3] = level_3db;
return 12;
case CONVERT (DTS_3F2R, DTS_3F1R):
coeff[0] = coeff[1] = coeff[2] = level;
coeff[3] = coeff[4] = level_3db;
return 24;
case CONVERT (DTS_2F1R, DTS_2F2R):
coeff[0] = coeff[1] = level;
coeff[2] = level_3db;
return 0;
case CONVERT (DTS_3F1R, DTS_2F2R):
coeff[0] = coeff[2] = level;
coeff[1] = MUL_L (level, clev);
coeff[3] = level_3db;
return 7;
case CONVERT (DTS_3F1R, DTS_3F2R):
coeff[0] = coeff[1] = coeff[2] = level;
coeff[3] = level_3db;
return 0;
}
return -1; /* NOTREACHED */
}
