Simple audio in-out code for the ADSP-BF706 EZ-KIT

Not very much can be gain by block processing in this case, since sample by sample
processing is already quite efficient.
At fc = 400 MHz clock frequency and fs = 48 kHz sampling frequency fc / fs =
8333 cycles are available for one audio sample (or a frame left/right).
The Blackfin+ is able to compute a 32 bit FIR filter of N coefficients in N cycles
(or 2*N coefficients in N cycles for 16 bit filters).

Therefore, a filter length of 8333 is the theoretical maximum. 8000 is 96% of that maximum.
No significant improvement is possible unless other algorithms for block FIR are used.

For some algorithms like biquad filters, the function call overhead can be an issue with
sample by sample processing. In this case C/C++ inline functions can be advantageous.

Not very much can be gain by block processing in this case, since sample by sample
processing is already quite efficient.
At fc = 400 MHz clock frequency and fs = 48 kHz sampling frequency fc / fs =
8333 cycles are available for one audio sample (or a frame left/right).
The Blackfin+ is able to compute a 32 bit FIR filter of N coefficients in N cycles
(or 2*N coefficients in N cycles for 16 bit filters).

Therefore, a filter length of 8333 is the theoretical maximum. 8000 is 96% of that maximum.
No significant improvement is possible unless other algorithms for block FIR are used.

For some algorithms like biquad filters, the function call overhead can be an issue with
sample by sample processing. In this case C/C++ inline functions can be advantageous.