Channel map, specifies transformation of one-to-many or many-to-one. More...

#include <channel_map.h>

Data Fields
uint32_t	ch_index
uint32_t	ext_id
uint32_t	ch_mask
uint32_t	reserved
int32_t	ch_coeffs []

Detailed Description

Channel map, specifies transformation of one-to-many or many-to-one.

In case of one-to-many specifies how the output channels are computed out of a single source channel, in case of many-to-one specifies how a single target channel is computed from a multichannel input stream.

Channel index specifies position of the channel in the stream on the 'one' side.

Ext ID is the identifier of external part of the transformation. Depending on the context, it may be pipeline ID, dai ID, ...

Channel mask describes which channels are taken into account on the "many" side. Bit[i] set to 1 means that i-th channel is used for computation (either as source or as a target).

Channel mask is followed by array of coefficients in Q2.30 format, one per each channel set in the mask (left to right, LS bit set in the mask corresponds to ch_coeffs[0]).

Field Documentation

◆ ch_coeffs

int32_t sof_ipc_channel_map::ch_coeffs[]

◆ ch_index

uint32_t sof_ipc_channel_map::ch_index

◆ ch_mask

uint32_t sof_ipc_channel_map::ch_mask

◆ ext_id

uint32_t sof_ipc_channel_map::ext_id

◆ reserved

uint32_t sof_ipc_channel_map::reserved

The documentation for this struct was generated from the following file:

/home/lrg/work/sof-dox-work/src/include/ipc/channel_map.h