linux/sound/soc/qcom/qdsp6/q6dsp-common.c

// SPDX-License-Identifier: GPL-2.0
// Copyright (c) 2011-2017, The Linux Foundation. All rights reserved.
// Copyright (c) 2018, Linaro Limited

#include "q6dsp-common.h"
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/errno.h>

int q6dsp_map_channels(u8 ch_map[PCM_MAX_NUM_CHANNEL], int ch)
{
	memset(ch_map, 0, PCM_MAX_NUM_CHANNEL);

	switch (ch) {
	case 1:
		ch_map[0] = PCM_CHANNEL_FC;
		break;
	case 2:
		ch_map[0] = PCM_CHANNEL_FL;
		ch_map[1] = PCM_CHANNEL_FR;
		break;
	case 3:
		ch_map[0] = PCM_CHANNEL_FL;
		ch_map[1] = PCM_CHANNEL_FR;
		ch_map[2] = PCM_CHANNEL_FC;
		break;
	case 4:
		ch_map[0] = PCM_CHANNEL_FL;
		ch_map[1] = PCM_CHANNEL_FR;
		ch_map[2] = PCM_CHANNEL_LS;
		ch_map[3] = PCM_CHANNEL_RS;
		break;
	case 5:
		ch_map[0] = PCM_CHANNEL_FL;
		ch_map[1] = PCM_CHANNEL_FR;
		ch_map[2] = PCM_CHANNEL_FC;
		ch_map[3] = PCM_CHANNEL_LS;
		ch_map[4] = PCM_CHANNEL_RS;
		break;
	case 6:
		ch_map[0] = PCM_CHANNEL_FL;
		ch_map[1] = PCM_CHANNEL_FR;
		ch_map[2] = PCM_CHANNEL_LFE;
		ch_map[3] = PCM_CHANNEL_FC;
		ch_map[4] = PCM_CHANNEL_LS;
		ch_map[5] = PCM_CHANNEL_RS;
		break;
	case 8:
		ch_map[0] = PCM_CHANNEL_FL;
		ch_map[1] = PCM_CHANNEL_FR;
		ch_map[2] = PCM_CHANNEL_LFE;
		ch_map[3] = PCM_CHANNEL_FC;
		ch_map[4] = PCM_CHANNEL_LS;
		ch_map[5] = PCM_CHANNEL_RS;
		ch_map[6] = PCM_CHANNEL_LB;
		ch_map[7] = PCM_CHANNEL_RB;
		break;
	default:
		return -EINVAL;
	}

	return 0;
}
EXPORT_SYMBOL_GPL(q6dsp_map_channels);
MODULE_LICENSE("GPL v2");