/* $NetBSD: parse.c,v 1.4 2025/10/19 15:59:19 nia Exp $ */
/*-
 * Copyright (c) 2021 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Nia Alarie.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
#include <sys/audioio.h>
#include <sys/ioctl.h>
#include <curses.h>
#include <stdlib.h>
#include "app.h"
#include "parse.h"

static struct aiomixer_class *get_class(struct aiomixer *, int);
static int compare_control(const void *, const void *);
static int compare_class(const void *, const void *);

static struct aiomixer_class *
get_class(struct aiomixer *aio, int class)
{
        size_t i;

        for (i = 0; i < aio->numclasses; ++i) {
                if (aio->classes[i].index == class) {
                        return &aio->classes[i];
                }
        }
        return NULL;
}

static int
compare_control(const void *pa, const void *pb)
{
        const struct aiomixer_control *a = (const struct aiomixer_control *)pa;
        const struct aiomixer_control *b = (const struct aiomixer_control *)pb;

        if (a->info.prev != AUDIO_MIXER_LAST ||
            b->info.prev != AUDIO_MIXER_LAST) {
                if (b->info.prev == a->info.index)
                        return -1;
                if (a->info.prev == b->info.index)
                        return 1;
        } else {
                /* put "master" controls first */
                if (strstr(a->info.label.name, AudioNmaster) != NULL) {
                        if (strstr(b->info.label.name, AudioNmaster) == NULL) {
                                return -1;
                        }
                } else if (strstr(b->info.label.name, AudioNmaster) != NULL) {
                        return 1;
                }
                return strcmp(a->info.label.name, b->info.label.name);
        }
        return 0;
}

static int
compare_class(const void *pa, const void *pb)
{
        const struct aiomixer_class *a = (const struct aiomixer_class *)pa;
        const struct aiomixer_class *b = (const struct aiomixer_class *)pb;

        if (strcmp(a->name, AudioCoutputs) == 0)
                return -1;
        if (strcmp(b->name, AudioCoutputs) == 0)
                return 1;

        return strcmp(a->name, b->name);
}

int
aiomixer_parse(struct aiomixer *aio)
{
        size_t i;
        struct mixer_devinfo info;
        struct aiomixer_class *class;
        struct aiomixer_control *control;

        for (info.index = 0;
            ioctl(aio->fd, AUDIO_MIXER_DEVINFO, &info) != -1; ++info.index) {
                if (info.type != AUDIO_MIXER_CLASS)
                        continue;
                if (aio->numclasses >= __arraycount(aio->classes))
                        break;
                class = &aio->classes[aio->numclasses++];
                memcpy(class->name, info.label.name, MAX_AUDIO_DEV_LEN);
                class->index = info.index;
                class->numcontrols = 0;
        }
        for (info.index = 0;
            ioctl(aio->fd, AUDIO_MIXER_DEVINFO, &info) != -1; ++info.index) {
                if (info.type == AUDIO_MIXER_CLASS)
                        continue;
                if (info.type == AUDIO_MIXER_VALUE) {
                        /* XXX workaround for hdaudio(4) bugs */
                        if (info.un.v.delta > AUDIO_MAX_GAIN)
                                continue;
                        if (info.un.v.num_channels == 0)
                                continue;
                }
                class = get_class(aio, info.mixer_class);
                if (class == NULL)
                        break;
                if (class->numcontrols >= __arraycount(class->controls))
                        break;
                control = &class->controls[class->numcontrols++];
                control->info = info;
        }
        qsort(aio->classes, aio->numclasses,
            sizeof(struct aiomixer_class),
            compare_class);
        for (i = 0; i < aio->numclasses; ++i) {
                class = &aio->classes[i];
                qsort(class->controls, class->numcontrols,
                    sizeof(struct aiomixer_control),
                    compare_control);
        }
        return 0;
}