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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) *//* * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * Copyright(c) 2019 Intel Corporation */
#ifndef __IPC_CHANNEL_MAP_H__#define __IPC_CHANNEL_MAP_H__
#include <uapi/sound/sof/header.h>#include <sound/sof/header.h>
/** * \brief 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]). */struct sof_ipc_channel_map { uint32_t ch_index; uint32_t ext_id; uint32_t ch_mask; uint32_t reserved; int32_t ch_coeffs[];} __packed;
/** * \brief Complete map for each channel of a multichannel stream. * * num_ch_map Specifies number of items in the ch_map. * More than one transformation per a single channel is allowed (in case * multiple external entities are transformed). * A channel may be skipped in the transformation list, then it is filled * with 0's by the transformation function. */struct sof_ipc_stream_map { struct sof_ipc_cmd_hdr hdr; uint32_t num_ch_map; uint32_t reserved[3]; struct sof_ipc_channel_map ch_map[];} __packed;
#endif /* __IPC_CHANNEL_MAP_H__ */