/*
 * Copyright (c) 2015, Igalia S.L
 *     Author: Philippe Normand <philn@igalia.com>
 * Licence: LGPL. (See COPYING.LGPL)
 */

#include <glib.h>
#include <gst/gst.h>
#include <gst/video/videoorientation.h>

#define PIPELINE "rpicamsrc name=src preview=0 fullscreen=0 ! h264parse ! omxh264dec ! glimagesink sync=0"

void configure_orientation(GstVideoOrientation* orientation)
{
    gboolean flip;

    if (gst_video_orientation_get_hflip(orientation, &flip)) {
        g_print("current hflip: %s\n", flip ? "enabled" : "disabled");

        if (g_getenv("HFLIP"))
            gst_video_orientation_set_hflip(orientation, TRUE);

        gst_video_orientation_get_hflip(orientation, &flip);
        g_print("new hflip: %s\n", flip ? "enabled" : "disabled");
    }

    if (gst_video_orientation_get_vflip(orientation, &flip)) {
        g_print("current vflip: %s\n", flip ? "enabled" : "disabled");

        if (g_getenv("VFLIP"))
            gst_video_orientation_set_vflip(orientation, TRUE);

        gst_video_orientation_get_vflip(orientation, &flip);
        g_print("new vflip: %s\n", flip ? "enabled" : "disabled");
    }
}

int main(int argc, char** argv)
{
    GMainLoop* loop;
    GstElement* pipeline;
    GError* error = NULL;
    GstElement* src;
    GstVideoOrientation* orientation;

    gst_init(&argc, &argv);
    loop = g_main_loop_new(NULL, FALSE);

    pipeline = gst_parse_launch(PIPELINE, &error);
    if (error != NULL) {
        g_printerr("Error parsing '%s': %s", PIPELINE, error->message);
        g_error_free(error);
        return -1;
    }

    gst_element_set_state(pipeline, GST_STATE_PLAYING);
    src = gst_bin_get_by_name(GST_BIN(pipeline), "src");
    if (!src) {
        g_printerr("Source element not found\n");
        return -2;
    }

    orientation = GST_VIDEO_ORIENTATION(src);
    configure_orientation(orientation);
    g_main_loop_run(loop);

    gst_object_unref(src);
    gst_element_set_state(pipeline, GST_STATE_NULL);
    return 0;
}