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