/*
 * V4L2 subdev interface library
 *
 * Copyright (C) 2010-2014 Ideas on board SPRL
 *
 * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <linux/v4l2-subdev.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

#include "mediactl-priv.h"
#include "mediactl.h"
#include "tools.h"
#include "v4l2subdev.h"

#ifdef LOG_TAG
    #undef LOG_TAG
#endif
#define LOG_TAG "aiqtool"

int v4l2_subdev_open(struct media_entity* entity)
{
    if (entity->fd != -1) {
        return 0;
    }

    entity->fd = open(entity->devname, O_RDWR);
    if (entity->fd == -1) {
        int ret = -errno;
        media_dbg(entity->media, "%s: Failed to open subdev device node %s\n", __func__, entity->devname);
        return ret;
    }

    return 0;
}

void v4l2_subdev_close(struct media_entity* entity)
{
    close(entity->fd);
    entity->fd = -1;
}

int v4l2_subdev_get_format(struct media_entity* entity, struct v4l2_mbus_framefmt* format, unsigned int pad,
                           enum v4l2_subdev_format_whence which)
{
    struct v4l2_subdev_format fmt;
    int ret;

    ret = v4l2_subdev_open(entity);
    if (ret < 0) {
        return ret;
    }

    memset(&fmt, 0, sizeof(fmt));
    fmt.pad = pad;
    fmt.which = which;

    ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_FMT, &fmt);
    if (ret < 0) {
        return -errno;
    }

    *format = fmt.format;
    return 0;
}

int v4l2_subdev_set_format(struct media_entity* entity, struct v4l2_mbus_framefmt* format, unsigned int pad,
                           enum v4l2_subdev_format_whence which)
{
    struct v4l2_subdev_format fmt;
    int ret;

    ret = v4l2_subdev_open(entity);
    if (ret < 0) {
        return ret;
    }

    memset(&fmt, 0, sizeof(fmt));
    fmt.pad = pad;
    fmt.which = which;
    fmt.format = *format;

    ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_FMT, &fmt);
    if (ret < 0) {
        return -errno;
    }

    *format = fmt.format;
    return 0;
}

int v4l2_subdev_get_selection(struct media_entity* entity, struct v4l2_rect* rect, unsigned int pad,
                              unsigned int target, enum v4l2_subdev_format_whence which)
{
    union {
        struct v4l2_subdev_selection sel;
        struct v4l2_subdev_crop crop;
    } u;
    int ret;

    ret = v4l2_subdev_open(entity);
    if (ret < 0) {
        return ret;
    }

    memset(&u.sel, 0, sizeof(u.sel));
    u.sel.pad = pad;
    u.sel.target = target;
    u.sel.which = which;

    ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_SELECTION, &u.sel);
    if (ret >= 0) {
        *rect = u.sel.r;
        return 0;
    }
    if (errno != ENOTTY || target != V4L2_SEL_TGT_CROP) {
        return -errno;
    }

    memset(&u.crop, 0, sizeof(u.crop));
    u.crop.pad = pad;
    u.crop.which = which;

    ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_CROP, &u.crop);
    if (ret < 0) {
        return -errno;
    }

    *rect = u.crop.rect;
    return 0;
}

int v4l2_subdev_set_selection(struct media_entity* entity, struct v4l2_rect* rect, unsigned int pad,
                              unsigned int target, enum v4l2_subdev_format_whence which)
{
    union {
        struct v4l2_subdev_selection sel;
        struct v4l2_subdev_crop crop;
    } u;
    int ret;

    ret = v4l2_subdev_open(entity);
    if (ret < 0) {
        return ret;
    }

    memset(&u.sel, 0, sizeof(u.sel));
    u.sel.pad = pad;
    u.sel.target = target;
    u.sel.which = which;
    u.sel.r = *rect;

    ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_SELECTION, &u.sel);
    if (ret >= 0) {
        *rect = u.sel.r;
        return 0;
    }
    if (errno != ENOTTY || target != V4L2_SEL_TGT_CROP) {
        return -errno;
    }

    memset(&u.crop, 0, sizeof(u.crop));
    u.crop.pad = pad;
    u.crop.which = which;
    u.crop.rect = *rect;

    ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_CROP, &u.crop);
    if (ret < 0) {
        return -errno;
    }

    *rect = u.crop.rect;
    return 0;
}

int v4l2_subdev_get_dv_timings_caps(struct media_entity* entity, struct v4l2_dv_timings_cap* caps)
{
    unsigned int pad = caps->pad;
    int ret;

    ret = v4l2_subdev_open(entity);
    if (ret < 0) {
        return ret;
    }

    memset(caps, 0, sizeof(*caps));
    caps->pad = pad;

    ret = ioctl(entity->fd, VIDIOC_SUBDEV_DV_TIMINGS_CAP, caps);
    if (ret < 0) {
        return -errno;
    }

    return 0;
}

int v4l2_subdev_query_dv_timings(struct media_entity* entity, struct v4l2_dv_timings* timings)
{
    int ret;

    ret = v4l2_subdev_open(entity);
    if (ret < 0) {
        return ret;
    }

    memset(timings, 0, sizeof(*timings));

    ret = ioctl(entity->fd, VIDIOC_SUBDEV_QUERY_DV_TIMINGS, timings);
    if (ret < 0) {
        return -errno;
    }

    return 0;
}

int v4l2_subdev_get_dv_timings(struct media_entity* entity, struct v4l2_dv_timings* timings)
{
    int ret;

    ret = v4l2_subdev_open(entity);
    if (ret < 0) {
        return ret;
    }

    memset(timings, 0, sizeof(*timings));

    ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_DV_TIMINGS, timings);
    if (ret < 0) {
        return -errno;
    }

    return 0;
}

int v4l2_subdev_set_dv_timings(struct media_entity* entity, struct v4l2_dv_timings* timings)
{
    int ret;

    ret = v4l2_subdev_open(entity);
    if (ret < 0) {
        return ret;
    }

    ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_DV_TIMINGS, timings);
    if (ret < 0) {
        return -errno;
    }

    return 0;
}

int v4l2_subdev_get_frame_interval(struct media_entity* entity, struct v4l2_fract* interval, unsigned int pad)
{
    struct v4l2_subdev_frame_interval ival;
    int ret;

    ret = v4l2_subdev_open(entity);
    if (ret < 0) {
        return ret;
    }

    memset(&ival, 0, sizeof(ival));
    ival.pad = pad;

    ret = ioctl(entity->fd, VIDIOC_SUBDEV_G_FRAME_INTERVAL, &ival);
    if (ret < 0) {
        return -errno;
    }

    *interval = ival.interval;
    return 0;
}

int v4l2_subdev_set_frame_interval(struct media_entity* entity, struct v4l2_fract* interval, unsigned int pad)
{
    struct v4l2_subdev_frame_interval ival;
    int ret;

    ret = v4l2_subdev_open(entity);
    if (ret < 0) {
        return ret;
    }

    memset(&ival, 0, sizeof(ival));
    ival.pad = pad;
    ival.interval = *interval;

    ret = ioctl(entity->fd, VIDIOC_SUBDEV_S_FRAME_INTERVAL, &ival);
    if (ret < 0) {
        return -errno;
    }

    *interval = ival.interval;
    return 0;
}

static int v4l2_subdev_parse_format(struct media_device* media, struct v4l2_mbus_framefmt* format, const char* p,
                                    char** endp)
{
    enum v4l2_mbus_pixelcode code;
    unsigned int width, height;
    char* fmt;
    char* end;

    /*
     * Compatibility with the old syntax: consider space as valid
     * separator between the media bus pixel code and the size.
     */
    for (; isspace(*p); ++p)
        ;
    for (end = (char*)p; *end != '/' && *end != ' ' && *end != '\0'; ++end)
        ;

    fmt = strndup(p, end - p);
    if (!fmt) {
        return -ENOMEM;
    }

    code = v4l2_subdev_string_to_pixelcode(fmt);
    free(fmt);
    if (code == (enum v4l2_mbus_pixelcode) - 1) {
        media_dbg(media, "Invalid pixel code '%.*s'\n", end - p, p);
        return -EINVAL;
    }

    p = end + 1;
    width = strtoul(p, &end, 10);
    if (*end != 'x') {
        media_dbg(media, "Expected 'x'\n");
        return -EINVAL;
    }

    p = end + 1;
    height = strtoul(p, &end, 10);
    *endp = end;

    memset(format, 0, sizeof(*format));
    format->width = width;
    format->height = height;
    format->code = code;

    return 0;
}

static int v4l2_subdev_parse_rectangle(struct media_device* media, struct v4l2_rect* r, const char* p, char** endp)
{
    char* end;

    if (*p++ != '(') {
        media_dbg(media, "Expected '('\n");
        *endp = (char*)p - 1;
        return -EINVAL;
    }

    r->left = strtoul(p, &end, 10);
    if (*end != ',') {
        media_dbg(media, "Expected ','\n");
        *endp = end;
        return -EINVAL;
    }

    p = end + 1;
    r->top = strtoul(p, &end, 10);
    if (*end++ != ')') {
        media_dbg(media, "Expected ')'\n");
        *endp = end - 1;
        return -EINVAL;
    }
    if (*end != '/') {
        media_dbg(media, "Expected '/'\n");
        *endp = end;
        return -EINVAL;
    }

    p = end + 1;
    r->width = strtoul(p, &end, 10);
    if (*end != 'x') {
        media_dbg(media, "Expected 'x'\n");
        *endp = end;
        return -EINVAL;
    }

    p = end + 1;
    r->height = strtoul(p, &end, 10);
    *endp = end;

    return 0;
}

static int v4l2_subdev_parse_frame_interval(struct media_device* media, struct v4l2_fract* interval, const char* p,
                                            char** endp)
{
    char* end;

    for (; isspace(*p); ++p)
        ;

    interval->numerator = strtoul(p, &end, 10);

    for (p = end; isspace(*p); ++p)
        ;
    if (*p++ != '/') {
        media_dbg(media, "Expected '/'\n");
        *endp = (char*)p - 1;
        return -EINVAL;
    }

    for (; isspace(*p); ++p)
        ;
    interval->denominator = strtoul(p, &end, 10);

    *endp = end;
    return 0;
}

/*
 * The debate over whether this function should be named icanhasstr() instead
 * has been strong and heated. If you feel like this would be an important
 * change, patches are welcome (or not).
 */
static bool strhazit(const char* str, const char** p)
{
    int len = strlen(str);

    if (strncmp(str, *p, len)) {
        return false;
    }

    for (*p += len; isspace(**p); ++*p)
        ;
    return true;
}

static struct media_pad* v4l2_subdev_parse_pad_format(struct media_device* media, struct v4l2_mbus_framefmt* format,
                                                      struct v4l2_rect* crop, struct v4l2_rect* compose,
                                                      struct v4l2_fract* interval, const char* p, char** endp)
{
    struct media_pad* pad;
    bool first;
    char* end;
    int ret;

    for (; isspace(*p); ++p)
        ;

    pad = media_parse_pad(media, p, &end);
    if (pad == NULL) {
        *endp = end;
        return NULL;
    }

    for (p = end; isspace(*p); ++p)
        ;
    if (*p++ != '[') {
        media_dbg(media, "Expected '['\n");
        *endp = (char*)p - 1;
        return NULL;
    }

    for (first = true;; first = false) {
        for (; isspace(*p); p++)
            ;

        /*
         * Backward compatibility: if the first property starts with an
         * uppercase later, process it as a format description.
         */
        if (strhazit("fmt:", &p) || (first && isupper(*p))) {
            ret = v4l2_subdev_parse_format(media, format, p, &end);
            if (ret < 0) {
                *endp = end;
                return NULL;
            }

            p = end;
            continue;
        }

        if (strhazit("field:", &p)) {
            enum v4l2_field field;
            char* strfield;

            for (end = (char*)p; isalpha(*end) || *end == '-'; ++end)
                ;

            strfield = strndup(p, end - p);
            if (!strfield) {
                *endp = (char*)p;
                return NULL;
            }

            field = v4l2_subdev_string_to_field(strfield);
            free(strfield);
            if (field == (enum v4l2_field) - 1) {
                media_dbg(media, "Invalid field value '%*s'\n", end - p, p);
                *endp = (char*)p;
                return NULL;
            }

            format->field = field;

            p = end;
            continue;
        }

        if (strhazit("colorspace:", &p)) {
            enum v4l2_colorspace colorspace;
            char* strfield;

            for (end = (char*)p; isalnum(*end) || *end == '-'; ++end)
                ;

            strfield = strndup(p, end - p);
            if (!strfield) {
                *endp = (char*)p;
                return NULL;
            }

            colorspace = v4l2_subdev_string_to_colorspace(strfield);
            free(strfield);
            if (colorspace == (enum v4l2_colorspace) - 1) {
                media_dbg(media, "Invalid colorspace value '%*s'\n", end - p, p);
                *endp = (char*)p;
                return NULL;
            }

            format->colorspace = colorspace;

            p = end;
            continue;
        }

        if (strhazit("xfer:", &p)) {
            enum v4l2_xfer_func xfer_func;
            char* strfield;

            for (end = (char*)p; isalnum(*end) || *end == '-'; ++end)
                ;

            strfield = strndup(p, end - p);
            if (!strfield) {
                *endp = (char*)p;
                return NULL;
            }

            xfer_func = v4l2_subdev_string_to_xfer_func(strfield);
            free(strfield);
            if (xfer_func == (enum v4l2_xfer_func) - 1) {
                media_dbg(media, "Invalid transfer function value '%*s'\n", end - p, p);
                *endp = (char*)p;
                return NULL;
            }

            format->xfer_func = xfer_func;

            p = end;
            continue;
        }

        if (strhazit("ycbcr:", &p)) {
            enum v4l2_ycbcr_encoding ycbcr_enc;
            char* strfield;

            for (end = (char*)p; isalnum(*end) || *end == '-'; ++end)
                ;

            strfield = strndup(p, end - p);
            if (!strfield) {
                *endp = (char*)p;
                return NULL;
            }

            ycbcr_enc = v4l2_subdev_string_to_ycbcr_encoding(strfield);
            free(strfield);
            if (ycbcr_enc == (enum v4l2_ycbcr_encoding) - 1) {
                media_dbg(media, "Invalid YCbCr encoding value '%*s'\n", end - p, p);
                *endp = (char*)p;
                return NULL;
            }

            format->ycbcr_enc = ycbcr_enc;

            p = end;
            continue;
        }

        if (strhazit("quantization:", &p)) {
            enum v4l2_quantization quantization;
            char* strfield;

            for (end = (char*)p; isalnum(*end) || *end == '-'; ++end)
                ;

            strfield = strndup(p, end - p);
            if (!strfield) {
                *endp = (char*)p;
                return NULL;
            }

            quantization = v4l2_subdev_string_to_quantization(strfield);
            free(strfield);
            if (quantization == (enum v4l2_quantization) - 1) {
                media_dbg(media, "Invalid quantization value '%*s'\n", end - p, p);
                *endp = (char*)p;
                return NULL;
            }

            format->quantization = quantization;

            p = end;
            continue;
        }

        /*
         * Backward compatibility: crop rectangles can be specified
         * implicitly without the 'crop:' property name.
         */
        if (strhazit("crop:", &p) || *p == '(') {
            ret = v4l2_subdev_parse_rectangle(media, crop, p, &end);
            if (ret < 0) {
                *endp = end;
                return NULL;
            }

            p = end;
            continue;
        }

        if (strhazit("compose:", &p)) {
            ret = v4l2_subdev_parse_rectangle(media, compose, p, &end);
            if (ret < 0) {
                *endp = end;
                return NULL;
            }

            for (p = end; isspace(*p); p++)
                ;
            continue;
        }

        if (*p == '@') {
            ret = v4l2_subdev_parse_frame_interval(media, interval, ++p, &end);
            if (ret < 0) {
                *endp = end;
                return NULL;
            }

            p = end;
            continue;
        }

        break;
    }

    if (*p != ']') {
        media_dbg(media, "Expected ']'\n");
        *endp = (char*)p;
        return NULL;
    }

    *endp = (char*)p + 1;
    return pad;
}

static int set_format(struct media_pad* pad, struct v4l2_mbus_framefmt* format)
{
    int ret;

    if (format->width == 0 || format->height == 0) {
        return 0;
    }

    media_dbg(pad->entity->media, "Setting up format %s %ux%u on pad %s/%u\n",
              v4l2_subdev_pixelcode_to_string(format->code), format->width, format->height, pad->entity->info.name,
              pad->index);

    ret = v4l2_subdev_set_format(pad->entity, format, pad->index, V4L2_SUBDEV_FORMAT_ACTIVE);
    if (ret < 0) {
        media_dbg(pad->entity->media, "Unable to set format: %s (%d)\n", strerror(-ret), ret);
        return ret;
    }

    media_dbg(pad->entity->media, "Format set: %s %ux%u\n", v4l2_subdev_pixelcode_to_string(format->code),
              format->width, format->height);

    return 0;
}

static int set_selection(struct media_pad* pad, unsigned int target, struct v4l2_rect* rect)
{
    int ret;

    if (rect->left == -1 || rect->top == -1) {
        return 0;
    }

    media_dbg(pad->entity->media, "Setting up selection target %u rectangle (%u,%u)/%ux%u on pad %s/%u\n", target,
              rect->left, rect->top, rect->width, rect->height, pad->entity->info.name, pad->index);

    ret = v4l2_subdev_set_selection(pad->entity, rect, pad->index, target, V4L2_SUBDEV_FORMAT_ACTIVE);
    if (ret < 0) {
        media_dbg(pad->entity->media, "Unable to set selection rectangle: %s (%d)\n", strerror(-ret), ret);
        return ret;
    }

    media_dbg(pad->entity->media, "Selection rectangle set: (%u,%u)/%ux%u\n", rect->left, rect->top, rect->width,
              rect->height);

    return 0;
}

static int set_frame_interval(struct media_pad* pad, struct v4l2_fract* interval)
{
    int ret;

    if (interval->numerator == 0) {
        return 0;
    }

    media_dbg(pad->entity->media, "Setting up frame interval %u/%u on pad %s/%u\n", interval->numerator,
              interval->denominator, pad->entity->info.name, pad->index);

    ret = v4l2_subdev_set_frame_interval(pad->entity, interval, pad->index);
    if (ret < 0) {
        media_dbg(pad->entity->media, "Unable to set frame interval: %s (%d)", strerror(-ret), ret);
        return ret;
    }

    media_dbg(pad->entity->media, "Frame interval set: %u/%u\n", interval->numerator, interval->denominator);

    return 0;
}

static int v4l2_subdev_parse_setup_format(struct media_device* media, const char* p, char** endp)
{
    struct v4l2_mbus_framefmt format = {0, 0, 0};
    struct media_pad* pad;
    struct v4l2_rect crop = {-1, -1, -1, -1};
    struct v4l2_rect compose = crop;
    struct v4l2_fract interval = {0, 0};
    unsigned int i;
    char* end;
    int ret;

    pad = v4l2_subdev_parse_pad_format(media, &format, &crop, &compose, &interval, p, &end);
    if (pad == NULL) {
        media_print_streampos(media, p, end);
        media_dbg(media, "Unable to parse format\n");
        return -EINVAL;
    }

    if (pad->flags & MEDIA_PAD_FL_SINK) {
        ret = set_format(pad, &format);
        if (ret < 0) {
            return ret;
        }
    }

    ret = set_selection(pad, V4L2_SEL_TGT_CROP, &crop);
    if (ret < 0) {
        return ret;
    }

    ret = set_selection(pad, V4L2_SEL_TGT_COMPOSE, &compose);
    if (ret < 0) {
        return ret;
    }

    if (pad->flags & MEDIA_PAD_FL_SOURCE) {
        ret = set_format(pad, &format);
        if (ret < 0) {
            return ret;
        }
    }

    ret = set_frame_interval(pad, &interval);
    if (ret < 0) {
        return ret;
    }

    /* If the pad is an output pad, automatically set the same format and
     * frame interval on the remote subdev input pads, if any.
     */
    if (pad->flags & MEDIA_PAD_FL_SOURCE) {
        for (i = 0; i < pad->entity->num_links; ++i) {
            struct media_link* link = &pad->entity->links[i];
            struct v4l2_mbus_framefmt remote_format;

            if (!(link->flags & MEDIA_LNK_FL_ENABLED)) {
                continue;
            }

            if (link->source == pad && link->sink->entity->info.type == MEDIA_ENT_T_V4L2_SUBDEV) {
                remote_format = format;
                set_format(link->sink, &remote_format);

                ret = set_frame_interval(link->sink, &interval);
                if (ret < 0 && ret != -EINVAL && ret != -ENOTTY) {
                    return ret;
                }
            }
        }
    }

    *endp = end;
    return 0;
}

int v4l2_subdev_parse_setup_formats(struct media_device* media, const char* p)
{
    char* end;
    int ret;

    do {
        ret = v4l2_subdev_parse_setup_format(media, p, &end);
        if (ret < 0) {
            return ret;
        }

        for (; isspace(*end); end++)
            ;
        p = end + 1;
    } while (*end == ',');

    return *end ? -EINVAL : 0;
}

static const struct {
    const char* name;
    enum v4l2_mbus_pixelcode code;
} mbus_formats[] = {
#include "media-bus-format-names.h"
    {"Y8", MEDIA_BUS_FMT_Y8_1X8},
    {"Y10", MEDIA_BUS_FMT_Y10_1X10},
    {"Y12", MEDIA_BUS_FMT_Y12_1X12},
    {"YUYV", MEDIA_BUS_FMT_YUYV8_1X16},
    {"YUYV1_5X8", MEDIA_BUS_FMT_YUYV8_1_5X8},
    {"YUYV2X8", MEDIA_BUS_FMT_YUYV8_2X8},
    {"UYVY", MEDIA_BUS_FMT_UYVY8_1X16},
    {"UYVY1_5X8", MEDIA_BUS_FMT_UYVY8_1_5X8},
    {"UYVY2X8", MEDIA_BUS_FMT_UYVY8_2X8},
    {"VUY24", MEDIA_BUS_FMT_VUY8_1X24},
    {"SBGGR8", MEDIA_BUS_FMT_SBGGR8_1X8},
    {"SGBRG8", MEDIA_BUS_FMT_SGBRG8_1X8},
    {"SGRBG8", MEDIA_BUS_FMT_SGRBG8_1X8},
    {"SRGGB8", MEDIA_BUS_FMT_SRGGB8_1X8},
    {"SBGGR10", MEDIA_BUS_FMT_SBGGR10_1X10},
    {"SGBRG10", MEDIA_BUS_FMT_SGBRG10_1X10},
    {"SGRBG10", MEDIA_BUS_FMT_SGRBG10_1X10},
    {"SRGGB10", MEDIA_BUS_FMT_SRGGB10_1X10},
    {"SBGGR10_DPCM8", MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8},
    {"SGBRG10_DPCM8", MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8},
    {"SGRBG10_DPCM8", MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8},
    {"SRGGB10_DPCM8", MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8},
    {"SBGGR12", MEDIA_BUS_FMT_SBGGR12_1X12},
    {"SGBRG12", MEDIA_BUS_FMT_SGBRG12_1X12},
    {"SGRBG12", MEDIA_BUS_FMT_SGRBG12_1X12},
    {"SRGGB12", MEDIA_BUS_FMT_SRGGB12_1X12},
    {"AYUV32", MEDIA_BUS_FMT_AYUV8_1X32},
    {"RBG24", MEDIA_BUS_FMT_RBG888_1X24},
    {"RGB32", MEDIA_BUS_FMT_RGB888_1X32_PADHI},
    {"ARGB32", MEDIA_BUS_FMT_ARGB8888_1X32},
};

const char* v4l2_subdev_pixelcode_to_string(enum v4l2_mbus_pixelcode code)
{
    unsigned int i;

    for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
        if (mbus_formats[i].code == code) {
            return mbus_formats[i].name;
        }
    }

    return "unknown";
}

enum v4l2_mbus_pixelcode v4l2_subdev_string_to_pixelcode(const char* string)
{
    unsigned int i;

    for (i = 0; i < ARRAY_SIZE(mbus_formats); ++i) {
        if (strcmp(mbus_formats[i].name, string) == 0) {
            return mbus_formats[i].code;
        }
    }

    return (enum v4l2_mbus_pixelcode) - 1;
}

static struct {
    const char* name;
    enum v4l2_field field;
} fields[] = {
    {"any", V4L2_FIELD_ANY},
    {"none", V4L2_FIELD_NONE},
    {"top", V4L2_FIELD_TOP},
    {"bottom", V4L2_FIELD_BOTTOM},
    {"interlaced", V4L2_FIELD_INTERLACED},
    {"seq-tb", V4L2_FIELD_SEQ_TB},
    {"seq-bt", V4L2_FIELD_SEQ_BT},
    {"alternate", V4L2_FIELD_ALTERNATE},
    {"interlaced-tb", V4L2_FIELD_INTERLACED_TB},
    {"interlaced-bt", V4L2_FIELD_INTERLACED_BT},
};

const char* v4l2_subdev_field_to_string(enum v4l2_field field)
{
    unsigned int i;

    for (i = 0; i < ARRAY_SIZE(fields); ++i) {
        if (fields[i].field == field) {
            return fields[i].name;
        }
    }

    return "unknown";
}

enum v4l2_field v4l2_subdev_string_to_field(const char* string)
{
    unsigned int i;

    for (i = 0; i < ARRAY_SIZE(fields); ++i) {
        if (strcasecmp(fields[i].name, string) == 0) {
            return fields[i].field;
        }
    }

    return (enum v4l2_field) - 1;
}

static struct {
    const char* name;
    enum v4l2_colorspace colorspace;
} colorspaces[] = {
    {"default", V4L2_COLORSPACE_DEFAULT},     {"smpte170m", V4L2_COLORSPACE_SMPTE170M},
    {"smpte240m", V4L2_COLORSPACE_SMPTE240M}, {"rec709", V4L2_COLORSPACE_REC709},
    {"470m", V4L2_COLORSPACE_470_SYSTEM_M},   {"470bg", V4L2_COLORSPACE_470_SYSTEM_BG},
    {"jpeg", V4L2_COLORSPACE_JPEG},           {"srgb", V4L2_COLORSPACE_SRGB},
#ifdef __ANDROID__
    {"oprgb", V4L2_COLORSPACE_ADOBERGB},
#else
    {"oprgb", V4L2_COLORSPACE_OPRGB},
#endif
    {"bt2020", V4L2_COLORSPACE_BT2020},       {"dcip3", V4L2_COLORSPACE_DCI_P3},
};

const char* v4l2_subdev_colorspace_to_string(enum v4l2_colorspace colorspace)
{
    unsigned int i;

    for (i = 0; i < ARRAY_SIZE(colorspaces); ++i) {
        if (colorspaces[i].colorspace == colorspace) {
            return colorspaces[i].name;
        }
    }

    return "unknown";
}

enum v4l2_colorspace v4l2_subdev_string_to_colorspace(const char* string)
{
    unsigned int i;

    for (i = 0; i < ARRAY_SIZE(colorspaces); ++i) {
        if (strcasecmp(colorspaces[i].name, string) == 0) {
            return colorspaces[i].colorspace;
        }
    }

    return (enum v4l2_colorspace) - 1;
}

static struct {
    const char* name;
    enum v4l2_xfer_func xfer_func;
} xfer_funcs[] = {
    {"default", V4L2_XFER_FUNC_DEFAULT},     {"709", V4L2_XFER_FUNC_709},
    {"srgb", V4L2_XFER_FUNC_SRGB},
#ifdef __ANDROID__
    {"oprgb", V4L2_XFER_FUNC_ADOBERGB},
#else
    {"oprgb", V4L2_XFER_FUNC_OPRGB},
#endif
    {"smpte240m", V4L2_XFER_FUNC_SMPTE240M}, {"smpte2084", V4L2_XFER_FUNC_SMPTE2084},
    {"dcip3", V4L2_XFER_FUNC_DCI_P3},        {"none", V4L2_XFER_FUNC_NONE},
};

const char* v4l2_subdev_xfer_func_to_string(enum v4l2_xfer_func xfer_func)
{
    unsigned int i;

    for (i = 0; i < ARRAY_SIZE(xfer_funcs); ++i) {
        if (xfer_funcs[i].xfer_func == xfer_func) {
            return xfer_funcs[i].name;
        }
    }

    return "unknown";
}

enum v4l2_xfer_func v4l2_subdev_string_to_xfer_func(const char* string)
{
    unsigned int i;

    for (i = 0; i < ARRAY_SIZE(xfer_funcs); ++i) {
        if (strcasecmp(xfer_funcs[i].name, string) == 0) {
            return xfer_funcs[i].xfer_func;
        }
    }

    return (enum v4l2_xfer_func) - 1;
}

static struct {
    const char* name;
    enum v4l2_ycbcr_encoding ycbcr_enc;
} ycbcr_encs[] = {
    {"default", V4L2_YCBCR_ENC_DEFAULT},
    {"601", V4L2_YCBCR_ENC_601},
    {"709", V4L2_YCBCR_ENC_709},
    {"xv601", V4L2_YCBCR_ENC_XV601},
    {"xv709", V4L2_YCBCR_ENC_XV709},
    {"bt2020", V4L2_YCBCR_ENC_BT2020},
    {"bt2020c", V4L2_YCBCR_ENC_BT2020_CONST_LUM},
    {"smpte240m", V4L2_YCBCR_ENC_SMPTE240M},
};

const char* v4l2_subdev_ycbcr_encoding_to_string(enum v4l2_ycbcr_encoding ycbcr_enc)
{
    unsigned int i;

    for (i = 0; i < ARRAY_SIZE(ycbcr_encs); ++i) {
        if (ycbcr_encs[i].ycbcr_enc == ycbcr_enc) {
            return ycbcr_encs[i].name;
        }
    }

    return "unknown";
}

enum v4l2_ycbcr_encoding v4l2_subdev_string_to_ycbcr_encoding(const char* string)
{
    unsigned int i;

    for (i = 0; i < ARRAY_SIZE(ycbcr_encs); ++i) {
        if (strcasecmp(ycbcr_encs[i].name, string) == 0) {
            return ycbcr_encs[i].ycbcr_enc;
        }
    }

    return (enum v4l2_ycbcr_encoding) - 1;
}

static struct {
    const char* name;
    enum v4l2_quantization quantization;
} quantizations[] = {
    {"default", V4L2_QUANTIZATION_DEFAULT},
    {"full-range", V4L2_QUANTIZATION_FULL_RANGE},
    {"lim-range", V4L2_QUANTIZATION_LIM_RANGE},
};

const char* v4l2_subdev_quantization_to_string(enum v4l2_quantization quantization)
{
    unsigned int i;

    for (i = 0; i < ARRAY_SIZE(quantizations); ++i) {
        if (quantizations[i].quantization == quantization) {
            return quantizations[i].name;
        }
    }

    return "unknown";
}

enum v4l2_quantization v4l2_subdev_string_to_quantization(const char* string)
{
    unsigned int i;

    for (i = 0; i < ARRAY_SIZE(quantizations); ++i) {
        if (strcasecmp(quantizations[i].name, string) == 0) {
            return quantizations[i].quantization;
        }
    }

    return (enum v4l2_quantization) - 1;
}

static const enum v4l2_mbus_pixelcode mbus_codes[] = {
#include "media-bus-format-codes.h"
};

const enum v4l2_mbus_pixelcode* v4l2_subdev_pixelcode_list(unsigned int* length)
{
    *length = ARRAY_SIZE(mbus_codes);

    return mbus_codes;
}