Buffer Sizes for MFCC

Functions
int32_t	arm_mfcc_tmp_buffer_size (arm_math_target_arch arch, arm_math_datatype dt, uint32_t nb_samples, uint32_t buf_id, uint32_t use_cfft)
	Calculate required length for the temporary buffer.

Description

end of RFFTBuffers group

Function Documentation

arm_mfcc_tmp_buffer_size()

int32_t arm_mfcc_tmp_buffer_size	(	arm_math_target_arch	arch,
		arm_math_datatype	dt,
		uint32_t	nb_samples,
		uint32_t	buf_id,
		uint32_t	use_cfft
	)

Calculate required length for the temporary buffer.

Parameters

[in]	arch	Target architecture identification
[in]	dt	Data type of the input data
[in]	nb_samples	Number of samples in the input data
[in]	buf_id	Identification for the temporary buffer
[in]	use_cfft	1 if implementastion uses CFFT, 0 if RFFT

Returns

Length in datatype elements (real numbers) for the temporary buffer

Note

0 means not applicable (temporary buffer not needed)

-1 means error : configuration not supported

The define ARM_MFCC_USE_CFFT can be checked to know the current MFCC mode (CFFT or RFFT) for the build