Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 50bd4888 authored by Andy Hung's avatar Andy Hung Committed by Android (Google) Code Review
Browse files

Merge "libeffects: Correct ConcertSurround 96kHz and 192kHz filter coefs"

parents ddc014f7 79b85a87

media/libeffects/lvm/lib/StereoWidening/src/LVCS_Headphone_Coeffs.h

+18 −14
Original line number Diff line number Diff line
@@ -178,12 +178,14 @@ 
#define CS_MIDDLE_96000_B1                    (-0.993334)

#define CS_MIDDLE_96000_B2                     0.000000

#define CS_MIDDLE_96000_SCALE                        15

/* bandpass filter with fc1 270 and fc2 3703, designed using 2nd order butterworth */

#define CS_SIDE_96000_A0                     0.016727

#define CS_SIDE_96000_A1                     0.000000

#define CS_SIDE_96000_A2                    (-0.016727)

#define CS_SIDE_96000_B1                    (-1.793372)

#define CS_SIDE_96000_B2                     0.797236

/* Coefficients calculated using tf2ss and ss2tf functions based on

 * coefficients available for 48000Hz sampling frequency

 */

#define CS_SIDE_96000_A0                     0.224326f

#define CS_SIDE_96000_A1                     (-0.294937f)

#define CS_SIDE_96000_A2                     0.070611f

#define CS_SIDE_96000_B1                     (-1.792166f)

#define CS_SIDE_96000_B2                     0.795830f

#define CS_SIDE_96000_SCALE                  14



/* Stereo Enhancer coefficients for 176400Hz sample rate.
@@ -211,12 +213,14 @@ 
#define CS_MIDDLE_192000_B1                    (-0.996661)

#define CS_MIDDLE_192000_B2                     0.000000

#define CS_MIDDLE_192000_SCALE                        15

/* bandpass filter with fc1 270 and fc2 3703, designed using 2nd order butterworth */

#define CS_SIDE_192000_A0                     0.008991

#define CS_SIDE_192000_A1                    (-0.000000)

#define CS_SIDE_192000_A2                    (-0.008991)

#define CS_SIDE_192000_B1                    (-1.892509)

#define CS_SIDE_192000_B2                     0.893524

/* Coefficients calculated using tf2ss and ss2tf functions based on

 * coefficients available for 48000Hz sampling frequency

 */

#define CS_SIDE_192000_A0                    0.196039f

#define CS_SIDE_192000_A1                    (-0.311027f)

#define CS_SIDE_192000_A2                    0.114988f

#define CS_SIDE_192000_B1                    (-1.891380f)

#define CS_SIDE_192000_B2                    0.8923460f

#define CS_SIDE_192000_SCALE                 14

#endif