contin_array_buf_create()

int contin_array_buf_create	(	struct net_buf *	pcm_contin,
		void const *const	pcm_finite,
		uint16_t	pcm_finite_size,
		uint32_t	locations,
		uint16_t *const	_finite_pos )

#include <include/contin_array.h>

Creates a continuous array in the locations in the net_buf of given in locations, from a single channel finite array.

Note

This function assumes the finite array is of the same PCM format as the continuous array.

This function serves the purpose of e.g. having a set of audio samples stored in pcm_finite. This can then be fetched in smaller pieces into RAM and played back in a loop using the results in pcm_cont. The function keeps track of the current position in finite_pos, so that the function can be called multiple times and maintain the correct position in pcm_finite.

Parameters

pcm_contin

Pointer to the destination net buf.

Note

The continuous array can be empty. If so, the locations given in locations are filled with the finite array. All other valid locations are zeroed.

Parameters

pcm_finite	Pointer to the single channel de-interleaved finite array buffer.
pcm_finite_size	Size of the finite array buffer.
locations	Location(s) to write the finite array to.

Note

If locations is set to zero (mono) the pcm_contin locations must also be set to zero (mono) for the function to operate. If non-zero then all locations must be in the pcm_contin array for the function to operate.

Parameters

_finite_pos

Variable used internally. Must be set to 0 for the first run and not changed.

Return values

0	If the operation was successful.
ENXIO	On NULL pointer.
EPERM	If any sizes or location is out of range.
EINVAL	If the _finite_pos or locations are out of range.