30 lines
836 B
C
30 lines
836 B
C
#if !SPC_NOINTERP
|
|
/* Want scale optimized for smulw(y) */
|
|
#define GAUSS_TABLE_SCALE 4
|
|
#endif
|
|
|
|
#if !SPC_NOECHO
|
|
|
|
#define SPC_DSP_ECHO_APPLY
|
|
|
|
enum
|
|
{
|
|
FIR_BUF_CNT = FIR_BUF_HALF * 2,
|
|
FIR_BUF_SIZE = FIR_BUF_CNT * sizeof ( int32_t ),
|
|
FIR_BUF_ALIGN = FIR_BUF_SIZE,
|
|
FIR_BUF_MASK = ~((FIR_BUF_ALIGN / 2) | (sizeof ( int32_t ) - 1))
|
|
};
|
|
|
|
/* Echo filter structure embedded in struct Spc_Dsp */
|
|
struct echo_filter
|
|
{
|
|
/* fir_buf [i + 8] == fir_buf [i], to avoid wrap checking in FIR code */
|
|
int32_t* ptr;
|
|
/* FIR history is interleaved with guard to eliminate wrap checking
|
|
* when convolving.
|
|
* |LR|LR|LR|LR|LR|LR|LR|LR|--|--|--|--|--|--|--|--| */
|
|
/* copy of echo FIR constants as int16_t, loaded as int32 for
|
|
* halfword, packed multiples */
|
|
int16_t coeff [VOICE_COUNT];
|
|
};
|
|
#endif /* SPC_NOECHO */
|