/* GStreamer
 * Copyright (C) 2008-2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
 *
 * 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.
 */

/* Implementation of SMPTE 422M - Mapping JPEG2000 codestreams into the MXF
 * Generic Container
 */

/* TODO:
 *  - parse the jpeg2000 sub-descriptor, see SMPTE 422M 7.2
 *  - Add support for XYZ colorspace
 */

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

#include <gst/gst.h>
#include <string.h>

#include "mxfjpeg2000.h"

GST_DEBUG_CATEGORY_EXTERN (mxf_debug);
#define GST_CAT_DEFAULT mxf_debug

static gboolean
mxf_is_jpeg2000_essence_track (const MXFMetadataTimelineTrack * track)
{
  guint i;

  g_return_val_if_fail (track != NULL, FALSE);

  if (track->parent.descriptor == NULL)
    return FALSE;

  for (i = 0; i < track->parent.n_descriptor; i++) {
    MXFMetadataFileDescriptor *d = track->parent.descriptor[i];
    MXFUL *key;

    if (!d)
      continue;

    key = &d->essence_container;
    /* SMPTE 422M 5.4 */
    if (mxf_is_generic_container_essence_container_label (key) &&
        key->u[12] == 0x02 && key->u[13] == 0x0c &&
        (key->u[14] == 0x01 || key->u[14] == 0x02))
      return TRUE;
  }

  return FALSE;
}

static GstFlowReturn
mxf_jpeg2000_handle_essence_element (const MXFUL * key, GstBuffer * buffer,
    GstCaps * caps,
    MXFMetadataTimelineTrack * track,
    gpointer mapping_data, GstBuffer ** outbuf)
{
  *outbuf = buffer;

  /* SMPTE 422M 5.1 */
  if (key->u[12] != 0x15 || (key->u[14] != 0x08 && key->u[14] != 0x09)) {
    GST_ERROR ("Invalid JPEG2000 essence element");
    return GST_FLOW_ERROR;
  }

  return GST_FLOW_OK;
}


static GstCaps *
mxf_jpeg2000_create_caps (MXFMetadataTimelineTrack * track, GstTagList ** tags,
    MXFEssenceElementHandleFunc * handler, gpointer * mapping_data)
{
  MXFMetadataFileDescriptor *f = NULL;
  MXFMetadataGenericPictureEssenceDescriptor *p = NULL;
  guint i;
  GstCaps *caps = NULL;
  guint32 fourcc;

  g_return_val_if_fail (track != NULL, NULL);

  if (track->parent.descriptor == NULL) {
    GST_ERROR ("No descriptor found for this track");
    return NULL;
  }

  for (i = 0; i < track->parent.n_descriptor; i++) {
    if (!track->parent.descriptor[i])
      continue;

    if (MXF_IS_METADATA_GENERIC_PICTURE_ESSENCE_DESCRIPTOR (track->parent.
            descriptor[i])) {
      p = (MXFMetadataGenericPictureEssenceDescriptor *) track->
          parent.descriptor[i];
      f = track->parent.descriptor[i];
      break;
    } else if (MXF_IS_METADATA_FILE_DESCRIPTOR (track->parent.descriptor[i]) &&
        !MXF_IS_METADATA_MULTIPLE_DESCRIPTOR (track->parent.descriptor[i])) {
      f = track->parent.descriptor[i];
    }
  }

  if (!f) {
    GST_ERROR ("No descriptor found for this track");
    return NULL;
  }

  fourcc = GST_MAKE_FOURCC ('s', 'R', 'G', 'B');
  if (p && MXF_IS_METADATA_CDCI_PICTURE_ESSENCE_DESCRIPTOR (p)) {
    fourcc = GST_MAKE_FOURCC ('s', 'Y', 'U', 'V');
  } else if (p && MXF_IS_METADATA_RGBA_PICTURE_ESSENCE_DESCRIPTOR (p)) {
    MXFMetadataRGBAPictureEssenceDescriptor *r =
        (MXFMetadataRGBAPictureEssenceDescriptor *) p;
    gboolean rgb = TRUE;
    gboolean xyz = TRUE;
    gboolean yuv = TRUE;
    guint i;

    if (r->pixel_layout) {
      for (i = 0; i < r->n_pixel_layout; i++) {
        guint8 c = r->pixel_layout[2 * i];

        switch (c) {
          case 'R':
          case 'r':
          case 'G':
          case 'g':
          case 'B':
          case 'b':
            xyz = yuv = FALSE;
            break;
          case 'Y':
          case 'y':
            rgb = FALSE;
            break;
          case 'U':
          case 'u':
          case 'V':
          case 'v':
            xyz = rgb = FALSE;
            break;
          case 'X':
          case 'x':
          case 'Z':
          case 'z':
            rgb = yuv = FALSE;
            break;
          default:
            break;
        }
      }
      if (rgb) {
        fourcc = GST_MAKE_FOURCC ('s', 'R', 'G', 'B');
      } else if (yuv) {
        fourcc = GST_MAKE_FOURCC ('s', 'Y', 'U', 'V');
      } else if (xyz) {
        GST_ERROR ("JPEG2000 with XYZ colorspace not supported yet");
        return NULL;
      }
    }
  }

  *handler = mxf_jpeg2000_handle_essence_element;

  /* TODO: What about other field values? */
  caps =
      gst_caps_new_simple ("image/x-jpc", "fields", G_TYPE_INT, 1, "fourcc",
      GST_TYPE_FOURCC, fourcc, NULL);
  if (p) {
    mxf_metadata_generic_picture_essence_descriptor_set_caps (p, caps);
  } else {
    GST_WARNING ("Only a generic file descriptor found");
  }

  if (!*tags)
    *tags = gst_tag_list_new ();
  gst_tag_list_add (*tags, GST_TAG_MERGE_APPEND, GST_TAG_VIDEO_CODEC,
      "JPEG 2000", NULL);

  return caps;
}

static const MXFEssenceElementHandler mxf_jpeg2000_essence_element_handler = {
  mxf_is_jpeg2000_essence_track,
  mxf_jpeg2000_create_caps
};

void
mxf_jpeg2000_init (void)
{
  mxf_essence_element_handler_register (&mxf_jpeg2000_essence_element_handler);
}