gstreamer/gst/videofilter/gstvideoflip.c

/* GStreamer
 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
 * Copyright (C) <2003> David Schleef <ds@schleef.org>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/*
 * This file was (probably) generated from gstvideoflip.c,
 * gstvideoflip.c,v 1.7 2003/11/08 02:48:59 dschleef Exp 
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

/*#define DEBUG_ENABLED */
#include "gstvideoflip.h"
#include <string.h>

/* GstVideoflip signals and args */
enum
{
  /* FILL ME */
  LAST_SIGNAL
};

enum
{
  ARG_0,
  ARG_METHOD
      /* FILL ME */
};

GST_DEBUG_CATEGORY_STATIC (gst_videoflip_debug);
#define GST_CAT_DEFAULT gst_videoflip_debug

static void gst_videoflip_base_init (gpointer g_class);
static void gst_videoflip_class_init (gpointer g_class, gpointer class_data);
static void gst_videoflip_init (GTypeInstance * instance, gpointer g_class);

static void gst_videoflip_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec);
static void gst_videoflip_get_property (GObject * object, guint prop_id,
    GValue * value, GParamSpec * pspec);

static void gst_videoflip_planar411 (GstVideofilter * videofilter, void *dest,
    void *src);
static void gst_videoflip_setup (GstVideofilter * videofilter);

#define GST_TYPE_VIDEOFLIP_METHOD (gst_videoflip_method_get_type())

static GType
gst_videoflip_method_get_type (void)
{
  static GType videoflip_method_type = 0;
  static GEnumValue videoflip_methods[] = {
    {GST_VIDEOFLIP_METHOD_IDENTITY, "0", "Identity (no rotation)"},
    {GST_VIDEOFLIP_METHOD_90R, "1", "Rotate clockwise 90 degrees"},
    {GST_VIDEOFLIP_METHOD_180, "2", "Rotate 180 degrees"},
    {GST_VIDEOFLIP_METHOD_90L, "3", "Rotate counter-clockwise 90 degrees"},
    {GST_VIDEOFLIP_METHOD_HORIZ, "4", "Flip horizontally"},
    {GST_VIDEOFLIP_METHOD_VERT, "5", "Flip vertically"},
    {GST_VIDEOFLIP_METHOD_TRANS, "6",
        "Flip across upper left/lower right diagonal"},
    {GST_VIDEOFLIP_METHOD_OTHER, "7",
        "Flip across upper right/lower left diagonal"},
    {0, NULL, NULL},
  };

  if (!videoflip_method_type) {
    videoflip_method_type = g_enum_register_static ("GstVideoflipMethod",
        videoflip_methods);
  }
  return videoflip_method_type;
}

GType
gst_videoflip_get_type (void)
{
  static GType videoflip_type = 0;

  if (!videoflip_type) {
    static const GTypeInfo videoflip_info = {
      sizeof (GstVideoflipClass),
      gst_videoflip_base_init,
      NULL,
      gst_videoflip_class_init,
      NULL,
      NULL,
      sizeof (GstVideoflip),
      0,
      gst_videoflip_init,
    };

    videoflip_type = g_type_register_static (GST_TYPE_VIDEOFILTER,
        "GstVideoflip", &videoflip_info, 0);
  }
  return videoflip_type;
}

static GstVideofilterFormat gst_videoflip_formats[] = {
  /* planar */
  {"YV12", 12, gst_videoflip_planar411,},
  {"I420", 12, gst_videoflip_planar411,},
  {"IYUV", 12, gst_videoflip_planar411,},
};

static void
gst_videoflip_base_init (gpointer g_class)
{
  static GstElementDetails videoflip_details =
      GST_ELEMENT_DETAILS ("Video Flipper",
      "Filter/Effect/Video",
      "Flips and rotates video",
      "David Schleef <ds@schleef.org>");
  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
  GstVideofilterClass *videofilter_class = GST_VIDEOFILTER_CLASS (g_class);
  int i;

  gst_element_class_set_details (element_class, &videoflip_details);

  for (i = 0; i < G_N_ELEMENTS (gst_videoflip_formats); i++) {
    gst_videofilter_class_add_format (videofilter_class,
        gst_videoflip_formats + i);
  }

  gst_videofilter_class_add_pad_templates (GST_VIDEOFILTER_CLASS (g_class));
}

static void
gst_videoflip_class_init (gpointer g_class, gpointer class_data)
{
  GObjectClass *gobject_class;
  GstVideofilterClass *videofilter_class;

  gobject_class = G_OBJECT_CLASS (g_class);
  videofilter_class = GST_VIDEOFILTER_CLASS (g_class);

  gobject_class->set_property = gst_videoflip_set_property;
  gobject_class->get_property = gst_videoflip_get_property;

  g_object_class_install_property (gobject_class, ARG_METHOD,
      g_param_spec_enum ("method", "method", "method",
          GST_TYPE_VIDEOFLIP_METHOD, GST_VIDEOFLIP_METHOD_90R,
          G_PARAM_READWRITE));

  videofilter_class->setup = gst_videoflip_setup;
}

static void
gst_videoflip_init (GTypeInstance * instance, gpointer g_class)
{
  GstVideoflip *videoflip = GST_VIDEOFLIP (instance);
  GstVideofilter *videofilter;

  GST_DEBUG_OBJECT (videoflip, "gst_videoflip_init");

  videofilter = GST_VIDEOFILTER (videoflip);

  /* do stuff */
}

static void
gst_videoflip_set_property (GObject * object, guint prop_id,
    const GValue * value, GParamSpec * pspec)
{
  GstVideoflip *videoflip;
  GstVideofilter *videofilter;

  g_return_if_fail (GST_IS_VIDEOFLIP (object));
  videoflip = GST_VIDEOFLIP (object);
  videofilter = GST_VIDEOFILTER (object);

  GST_DEBUG_OBJECT (videoflip, "gst_videoflip_set_property");
  switch (prop_id) {
    case ARG_METHOD:
      videoflip->method = g_value_get_enum (value);
      if (videofilter->inited) {
        GST_DEBUG_OBJECT (videoflip, "setting up videoflip again");
        gst_videofilter_setup (videofilter);
      }
      break;
    default:
      break;
  }
}

static void
gst_videoflip_get_property (GObject * object, guint prop_id, GValue * value,
    GParamSpec * pspec)
{
  GstVideoflip *videoflip;

  g_return_if_fail (GST_IS_VIDEOFLIP (object));
  videoflip = GST_VIDEOFLIP (object);

  switch (prop_id) {
    case ARG_METHOD:
      g_value_set_enum (value, videoflip->method);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

static gboolean
plugin_init (GstPlugin * plugin)
{
  GST_DEBUG_CATEGORY_INIT (gst_videoflip_debug, "videoflip", 0, "videoflip");

  return gst_element_register (plugin, "videoflip", GST_RANK_NONE,
      GST_TYPE_VIDEOFLIP);
}

GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
    GST_VERSION_MINOR,
    "videoflip",
    "Flips and rotates video",
    plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN);

static void gst_videoflip_flip (GstVideoflip * videoflip,
    unsigned char *dest, unsigned char *src, int sw, int sh, int dw, int dh);


static void
gst_videoflip_setup (GstVideofilter * videofilter)
{
  int from_width, from_height;
  GstVideoflip *videoflip;

  videoflip = GST_VIDEOFLIP (videofilter);
  GST_DEBUG_OBJECT (videoflip, "gst_videoflip_setup");

  from_width = gst_videofilter_get_input_width (videofilter);
  from_height = gst_videofilter_get_input_height (videofilter);

  if (from_width == 0 || from_height == 0) {
    return;
  }

  switch (videoflip->method) {
    case GST_VIDEOFLIP_METHOD_90R:
    case GST_VIDEOFLIP_METHOD_90L:
    case GST_VIDEOFLIP_METHOD_TRANS:
    case GST_VIDEOFLIP_METHOD_OTHER:
      gst_videofilter_set_output_size (videofilter, from_height, from_width);
      break;
    case GST_VIDEOFLIP_METHOD_IDENTITY:
    case GST_VIDEOFLIP_METHOD_180:
    case GST_VIDEOFLIP_METHOD_HORIZ:
    case GST_VIDEOFLIP_METHOD_VERT:
      gst_videofilter_set_output_size (videofilter, from_width, from_height);
      break;
    default:
      g_assert_not_reached ();
      break;
  }

  GST_DEBUG_OBJECT (videoflip, "format=%p \"%s\" from %dx%d to %dx%d",
      videofilter->format, videofilter->format->fourcc,
      from_width, from_height, videofilter->to_width, videofilter->to_height);

  if (videoflip->method == GST_VIDEOFLIP_METHOD_IDENTITY) {
    GST_DEBUG_OBJECT (videoflip, "videoflip: using passthru");
    videofilter->passthru = TRUE;
  } else {
    videofilter->passthru = FALSE;
  }
}

static void
gst_videoflip_planar411 (GstVideofilter * videofilter, void *dest, void *src)
{
  GstVideoflip *videoflip;
  int sw;
  int sh;
  int dw;
  int dh;

  g_return_if_fail (GST_IS_VIDEOFLIP (videofilter));
  videoflip = GST_VIDEOFLIP (videofilter);

  sw = videofilter->from_width;
  sh = videofilter->from_height;
  dw = videofilter->to_width;
  dh = videofilter->to_height;

  GST_LOG_OBJECT (videoflip, "videoflip: scaling planar 4:1:1 %dx%d to %dx%d",
      sw, sh, dw, dh);

  gst_videoflip_flip (videoflip, dest, src, sw, sh, dw, dh);

  src += sw * sh;
  dest += dw * dh;

  dh = dh >> 1;
  dw = dw >> 1;
  sh = sh >> 1;
  sw = sw >> 1;

  gst_videoflip_flip (videoflip, dest, src, sw, sh, dw, dh);

  src += sw * sh;
  dest += dw * dh;

  gst_videoflip_flip (videoflip, dest, src, sw, sh, dw, dh);
}

static void
gst_videoflip_flip (GstVideoflip * videoflip, unsigned char *dest,
    unsigned char *src, int sw, int sh, int dw, int dh)
{
  int x, y;

  switch (videoflip->method) {
    case GST_VIDEOFLIP_METHOD_90R:
      for (y = 0; y < dh; y++) {
        for (x = 0; x < dw; x++) {
          dest[y * dw + x] = src[(sh - 1 - x) * sw + y];
        }
      }
      break;
    case GST_VIDEOFLIP_METHOD_90L:
      for (y = 0; y < dh; y++) {
        for (x = 0; x < dw; x++) {
          dest[y * dw + x] = src[x * sw + (sw - 1 - y)];
        }
      }
      break;
    case GST_VIDEOFLIP_METHOD_180:
      for (y = 0; y < dh; y++) {
        for (x = 0; x < dw; x++) {
          dest[y * dw + x] = src[(sh - 1 - y) * sw + (sw - 1 - x)];
        }
      }
      break;
    case GST_VIDEOFLIP_METHOD_HORIZ:
      for (y = 0; y < dh; y++) {
        for (x = 0; x < dw; x++) {
          dest[y * dw + x] = src[y * sw + (sw - 1 - x)];
        }
      }
      break;
    case GST_VIDEOFLIP_METHOD_VERT:
      for (y = 0; y < dh; y++) {
        for (x = 0; x < dw; x++) {
          dest[y * dw + x] = src[(sh - 1 - y) * sw + x];
        }
      }
      break;
    case GST_VIDEOFLIP_METHOD_TRANS:
      for (y = 0; y < dh; y++) {
        for (x = 0; x < dw; x++) {
          dest[y * dw + x] = src[x * sw + y];
        }
      }
      break;
    case GST_VIDEOFLIP_METHOD_OTHER:
      for (y = 0; y < dh; y++) {
        for (x = 0; x < dw; x++) {
          dest[y * dw + x] = src[(sh - 1 - x) * sw + (sw - 1 - y)];
        }
      }
      break;
    default:
      /* FIXME */
      break;
  }
}