/*
 *  test-filter.c - Test GstVaapiFilter
 *
 *  Copyright (C) 2010-2011 Splitted-Desktop Systems
 *    Author: Gwenole Beauchesne <gwenole.beauchesne@splitted-desktop.com>
 *  Copyright (C) 2012-2013 Intel Corporation
 *    Author: Halley Zhao <halley.zhao@intel.com>
 *    Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
 *
 *  This library 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 library 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 library; if not, write to the Free
 *  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301 USA
 */

#include "gst/vaapi/sysdeps.h"
#include <errno.h>
#include <gst/vaapi/gstvaapifilter.h>
#include <gst/vaapi/gstvaapiwindow.h>
#include "image.h"
#include "output.h"

static gchar *g_src_format_str;
static gchar *g_crop_rect_str;
static gchar *g_denoise_str;
static gchar *g_sharpen_str;
static gchar *g_deinterlace_str;
static gchar *g_deinterlace_flags_str;

static GOptionEntry g_options[] = {
  {"src-format", 's',
        0,
        G_OPTION_ARG_STRING, &g_src_format_str,
      "source surface format", NULL},
  {"crop-rect", 'c',
        0,
        G_OPTION_ARG_STRING, &g_crop_rect_str,
      "cropping rectangle", NULL},
  {"denoise", 0,
        0,
        G_OPTION_ARG_STRING, &g_denoise_str,
      "set noise reduction level", NULL},
  {"sharpen", 0,
        0,
        G_OPTION_ARG_STRING, &g_sharpen_str,
      "set sharpening level", NULL},
  {"deinterlace", 0,
        0,
        G_OPTION_ARG_STRING, &g_deinterlace_str,
      "enable deinterlacing", NULL},
  {"deinterlace-flags", 0,
        0,
        G_OPTION_ARG_STRING, &g_deinterlace_flags_str,
      "deinterlacing flags", NULL},
  {NULL,}
};

#define APP_ERROR app_error_quark()
static GQuark
app_error_quark (void)
{
  static gsize g_quark;

  if (g_once_init_enter (&g_quark)) {
    gsize quark = (gsize) g_quark_from_static_string ("AppError");
    g_once_init_leave (&g_quark, quark);
  }
  return g_quark;
}

typedef enum
{
  APP_ERROR_NONE,
  APP_ERROR_CREATE_TEST_SURFACE,
} AppError;

static inline void
pause (void)
{
  g_print ("Press any key to continue...\n");
  getchar ();
}

static GstVaapiSurface *
create_test_surface (GstVaapiDisplay * display, guint width, guint height,
    guint flags, GError ** error_ptr)
{
  GstVideoFormat format = GST_VIDEO_FORMAT_I420;
  GstVaapiSurface *surface = NULL;
  GstVaapiImage *image = NULL;
  GError *error = NULL;

  if (g_src_format_str) {
    format = gst_video_format_from_string (g_src_format_str);
    if (format == GST_VIDEO_FORMAT_UNKNOWN)
      goto error_invalid_format;
  }

  surface =
      gst_vaapi_surface_new_with_format (display, format, width, height, 0);
  if (!surface)
    goto error_create_surface;

  image = image_generate_full (display, format, width, height, flags);
  if (!image)
    goto error_create_image;

  if (!image_upload (image, surface))
    goto error_upload_image;

  gst_vaapi_image_unref (image);
  return surface;

  /* ERRORS */
error_invalid_format:
  error = g_error_new (APP_ERROR, APP_ERROR_CREATE_TEST_SURFACE,
      "unknown format %s", g_src_format_str);
  goto error_cleanup;
error_create_surface:
  error = g_error_new (APP_ERROR, APP_ERROR_CREATE_TEST_SURFACE,
      "unsupported format %s", gst_vaapi_video_format_to_string (format));
  goto error_cleanup;
error_create_image:
  error = g_error_new (APP_ERROR, APP_ERROR_CREATE_TEST_SURFACE,
      "unsupported %s image", gst_vaapi_video_format_to_string (format));
  goto error_cleanup;
error_upload_image:
  error = g_error_new (APP_ERROR, APP_ERROR_CREATE_TEST_SURFACE,
      "failed to upload %s image", gst_vaapi_video_format_to_string (format));
  goto error_cleanup;
error_cleanup:
  if (image)
    gst_vaapi_image_unref (image);
  if (surface)
    gst_vaapi_surface_unref (surface);
  if (error_ptr)
    *error_ptr = error;
  else
    g_error_free (error);
  return NULL;
}

static void
dump_operation (GstVaapiFilterOpInfo * op_info)
{
  GParamSpec *pspec;
  GValue value = G_VALUE_INIT;
  gchar *value_str;

  if (!op_info)
    return;

  pspec = op_info->pspec;
  g_print ("  %s: ", g_param_spec_get_name (pspec));
  g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
  g_param_value_set_default (pspec, &value);
  value_str = g_strdup_value_contents (&value);
  g_print ("%s (default: %s)\n", G_VALUE_TYPE_NAME (&value),
      value_str ? value_str : "<unknown>");
  g_free (value_str);
}

static void
dump_operations (GstVaapiFilter * filter)
{
  GPtrArray *const ops = gst_vaapi_filter_get_operations (filter);
  guint i;

  if (!ops)
    return;

  g_print ("%u operations\n", ops->len);
  for (i = 0; i < ops->len; i++)
    dump_operation (g_ptr_array_index (ops, i));
  g_ptr_array_unref (ops);
}

static void
dump_formats (GstVaapiFilter * filter)
{
  GArray *const formats = gst_vaapi_filter_get_formats (filter);
  guint i;

  if (!formats)
    return;

  g_print ("%u formats\n", formats->len);
  for (i = 0; i < formats->len; i++) {
    GstVideoFormat format = g_array_index (formats, GstVideoFormat, i);
    g_print ("  %s\n", gst_vaapi_video_format_to_string (format));
  }
  g_array_unref (formats);
}

static gboolean
parse_double (const gchar * str, gdouble * out_value_ptr)
{
  gchar *endptr = NULL;
  gdouble out_value;

  g_return_val_if_fail (out_value_ptr != NULL, FALSE);

  errno = 0;
  out_value = g_ascii_strtod (str, &endptr);
  if (!endptr || *endptr != '\0' || errno == ERANGE)
    return FALSE;

  *out_value_ptr = out_value;
  return TRUE;
}

static gboolean
parse_crop_rect (const gchar * str, GstVaapiRectangle * crop_rect)
{
  if (str) {
    // Format: <WIDTH> 'x' <HEIGHT>
    if (sscanf (str, "%ux%u", &crop_rect->width, &crop_rect->height) == 2) {
      crop_rect->x = 0;
      crop_rect->y = 0;
      return TRUE;
    }
    // Format: '('? <X> ',' <Y> ')'? <WIDTH> 'x' <HEIGHT>
    if (sscanf (str, "(%d,%d):%ux%u", &crop_rect->x, &crop_rect->y,
            &crop_rect->width, &crop_rect->height) == 4 ||
        sscanf (str, "%d,%d:%ux%u", &crop_rect->x, &crop_rect->y,
            &crop_rect->width, &crop_rect->height) == 4)
      return TRUE;
  }
  return FALSE;
}

static gboolean
parse_enum (const gchar * str, GType type, gint default_value,
    gint * out_value_ptr)
{
  gint out_value = default_value;

  g_return_val_if_fail (out_value_ptr != NULL, FALSE);

  if (str) {
    const GEnumValue *enum_value;
    GEnumClass *const enum_class = g_type_class_ref (type);

    if (!enum_class)
      return FALSE;

    enum_value = g_enum_get_value_by_nick (enum_class, str);
    if (enum_value)
      out_value = enum_value->value;
    g_type_class_unref (enum_class);

    if (!enum_value)
      return FALSE;
  }
  *out_value_ptr = out_value;
  return TRUE;
}

static gboolean
parse_flags (const gchar * str, GType type, guint * out_value_ptr)
{
  gchar **tokens = NULL;
  gint i, value, out_value = 0;
  gboolean success = FALSE;

  g_return_val_if_fail (out_value_ptr != NULL, FALSE);

  if (str) {
    tokens = g_strsplit (str, ",", 32);
    if (!tokens)
      return FALSE;

    for (i = 0; tokens[i] != NULL; i++) {
      if (!parse_enum (tokens[i], type, 0, &value))
        goto end;
      out_value |= value;
    }
  }
  *out_value_ptr = out_value;
  success = TRUE;

end:
  g_strfreev (tokens);
  return success;
}

static inline gboolean
parse_deinterlace (const gchar * str,
    GstVaapiDeinterlaceMethod * deinterlace_ptr)
{
  g_return_val_if_fail (deinterlace_ptr != NULL, FALSE);

  if (!str) {
    *deinterlace_ptr = GST_VAAPI_DEINTERLACE_METHOD_NONE;
    return TRUE;
  }
  return parse_enum (str, GST_VAAPI_TYPE_DEINTERLACE_METHOD,
      GST_VAAPI_DEINTERLACE_METHOD_NONE, (gint *) deinterlace_ptr);
}

static inline gboolean
parse_deinterlace_flags (const gchar * str, guint * deinterlace_flags_ptr)
{
  return parse_flags (str, GST_VAAPI_TYPE_DEINTERLACE_FLAGS,
      deinterlace_flags_ptr);
}

int
main (int argc, char *argv[])
{
  GstVaapiDisplay *display;
  GstVaapiWindow *window;
  GstVaapiSurface *src_surface, *dst_surface;
  GstVaapiFilter *filter = NULL;
  GstVaapiFilterStatus status;
  GstVaapiDeinterlaceMethod deinterlace_method;
  guint deinterlace_flags = 0;
  guint filter_flags = 0;
  guint surface_flags = 0;
  gdouble denoise_level, sharpen_level;
  GError *error = NULL;

  static const guint src_width = 320;
  static const guint src_height = 240;
  static const guint dst_width = 480;
  static const guint dst_height = 360;
  static const guint win_width = 640;
  static const guint win_height = 480;

  if (!video_output_init (&argc, argv, g_options))
    g_error ("failed to initialize video output subsystem");

  if (g_denoise_str && !parse_double (g_denoise_str, &denoise_level))
    g_error ("failed to parse noise reduction level");

  if (g_sharpen_str && !parse_double (g_sharpen_str, &sharpen_level))
    g_error ("failed to parse sharpening level");

  if (!parse_deinterlace (g_deinterlace_str, &deinterlace_method))
    g_error ("failed to parse deinterlace method `%s'", g_deinterlace_str);

  if (!parse_deinterlace_flags (g_deinterlace_flags_str, &deinterlace_flags))
    g_error ("failed to parse deinterlace flags `%s'", g_deinterlace_flags_str);

  display = video_output_create_display (NULL);
  if (!display)
    g_error ("failed to create VA display");

  window = video_output_create_window (display, win_width, win_height);
  if (!window)
    g_error ("failed to create window");

  filter = gst_vaapi_filter_new (display);
  if (!filter)
    g_error ("failed to create video processing pipeline");

  dump_operations (filter);
  dump_formats (filter);

  if (g_crop_rect_str) {
    GstVaapiRectangle crop_rect;

    if (!parse_crop_rect (g_crop_rect_str, &crop_rect))
      g_error ("failed to parse cropping rectangle");

    printf ("Frame cropping: (%d,%d), size %ux%u\n",
        crop_rect.x, crop_rect.y, crop_rect.width, crop_rect.height);

    if (!gst_vaapi_filter_set_cropping_rectangle (filter, &crop_rect))
      g_error ("failed to set cropping rectangle");
  }

  if (g_denoise_str) {
    printf ("Noise reduction level: %f\n", denoise_level);

    if (!gst_vaapi_filter_set_denoising_level (filter, denoise_level))
      g_error ("failed to set denoising level");
  }

  if (g_sharpen_str) {
    printf ("Sharpening level: %f\n", sharpen_level);

    if (!gst_vaapi_filter_set_sharpening_level (filter, sharpen_level))
      g_error ("failed to set sharpening level");
  }

  if (deinterlace_method != GST_VAAPI_DEINTERLACE_METHOD_NONE) {
    printf ("Enable deinterlacing: %s\n", g_deinterlace_str);

    if (!gst_vaapi_filter_set_deinterlacing (filter, deinterlace_method,
            deinterlace_flags))
      g_error ("failed to set deinterlacing method");
  } else if (deinterlace_flags) {
    if (deinterlace_flags & GST_VAAPI_DEINTERLACE_FLAG_TOPFIELD)
      filter_flags = GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD;
    else
      filter_flags = GST_VAAPI_PICTURE_STRUCTURE_BOTTOM_FIELD;
  }

  if (deinterlace_method != GST_VAAPI_DEINTERLACE_METHOD_NONE ||
      deinterlace_flags) {
    if (!(deinterlace_flags & GST_VAAPI_DEINTERLACE_FLAG_ONEFIELD))
      surface_flags = GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD |
          GST_VAAPI_PICTURE_STRUCTURE_BOTTOM_FIELD;
    else if (deinterlace_flags & GST_VAAPI_DEINTERLACE_FLAG_TOPFIELD)
      surface_flags = GST_VAAPI_PICTURE_STRUCTURE_TOP_FIELD;
    else
      surface_flags = GST_VAAPI_PICTURE_STRUCTURE_BOTTOM_FIELD;
  }

  src_surface = create_test_surface (display, src_width, src_height,
      surface_flags, &error);
  if (!src_surface)
    g_error ("failed to create source VA surface: %s", error->message);

  dst_surface = gst_vaapi_surface_new (display, GST_VAAPI_CHROMA_TYPE_YUV420,
      dst_width, dst_height);
  if (!dst_surface)
    g_error ("failed to create target VA surface");

  status = gst_vaapi_filter_process (filter, src_surface, dst_surface,
      filter_flags);
  if (status != GST_VAAPI_FILTER_STATUS_SUCCESS)
    g_error ("failed to process video filters");

  gst_vaapi_window_show (window);

  if (!gst_vaapi_window_put_surface (window, dst_surface, NULL, NULL,
          GST_VAAPI_PICTURE_STRUCTURE_FRAME))
    g_error ("failed to render target surface");

  pause ();

  gst_object_unref (filter);
  gst_vaapi_surface_unref (dst_surface);
  gst_vaapi_surface_unref (src_surface);
  gst_object_unref (window);
  gst_object_unref (display);
  video_output_exit ();
  g_free (g_src_format_str);
  g_free (g_crop_rect_str);
  g_free (g_denoise_str);
  g_free (g_sharpen_str);
  g_free (g_deinterlace_str);
  g_free (g_deinterlace_flags_str);
  return 0;
}