/* GStreamer

 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>

 *

 * 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.

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <string.h>

#include "gstsmokeenc.h"

#include <gst/video/video.h>

/* elementfactory information */

static const GstElementDetails gst_smokeenc_details =

GST_ELEMENT_DETAILS ("Smoke video encoder",

    "Codec/Encoder/Video",

    "Encode images into the Smoke format",

    "Wim Taymans <wim@fluendo.com>");

GST_DEBUG_CATEGORY (smokeenc_debug);

#define GST_CAT_DEFAULT smokeenc_debug

#define SMOKEENC_DEFAULT_MIN_QUALITY 10

#define SMOKEENC_DEFAULT_MAX_QUALITY 85

#define SMOKEENC_DEFAULT_THRESHOLD 3000

#define SMOKEENC_DEFAULT_KEYFRAME 20

/* SmokeEnc signals and args */

enum

{

  FRAME_ENCODED,

  /* FILL ME */

  LAST_SIGNAL

};

enum

{

  ARG_0,

  ARG_MIN_QUALITY,

  ARG_MAX_QUALITY,

  ARG_THRESHOLD,

  ARG_KEYFRAME

      /* FILL ME */

};

static void gst_smokeenc_base_init (gpointer g_class);

static void gst_smokeenc_class_init (GstSmokeEnc * klass);

static void gst_smokeenc_init (GstSmokeEnc * smokeenc);

static GstFlowReturn gst_smokeenc_chain (GstPad * pad, GstBuffer * buf);

static gboolean gst_smokeenc_setcaps (GstPad * pad, GstCaps * caps);

static GstCaps *gst_smokeenc_getcaps (GstPad * pad);

static void gst_smokeenc_resync (GstSmokeEnc * smokeenc);

static void gst_smokeenc_set_property (GObject * object, guint prop_id,

    const GValue * value, GParamSpec * pspec);

static void gst_smokeenc_get_property (GObject * object, guint prop_id,

    GValue * value, GParamSpec * pspec);

static GstElementClass *parent_class = NULL;

//static guint gst_smokeenc_signals[LAST_SIGNAL] = { 0 };

GType

gst_smokeenc_get_type (void)

{

  static GType smokeenc_type = 0;

  if (!smokeenc_type) {

    static const GTypeInfo smokeenc_info = {

      sizeof (GstSmokeEncClass),

      (GBaseInitFunc) gst_smokeenc_base_init,

      NULL,

      (GClassInitFunc) gst_smokeenc_class_init,

      NULL,

      NULL,

      sizeof (GstSmokeEnc),

      0,

      (GInstanceInitFunc) gst_smokeenc_init,

    };

    smokeenc_type =

        g_type_register_static (GST_TYPE_ELEMENT, "GstSmokeEnc", &smokeenc_info,

        0);

  }

  return smokeenc_type;

}

static GstStaticPadTemplate gst_smokeenc_sink_pad_template =

GST_STATIC_PAD_TEMPLATE ("sink",

    GST_PAD_SINK,

    GST_PAD_ALWAYS,

    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))

    );

static GstStaticPadTemplate gst_smokeenc_src_pad_template =

GST_STATIC_PAD_TEMPLATE ("src",

    GST_PAD_SRC,

    GST_PAD_ALWAYS,

    GST_STATIC_CAPS ("video/x-smoke, "

        "width = (int) [ 16, 4096 ], "

        "height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0/1, MAX ]")

    );

static void

gst_smokeenc_base_init (gpointer g_class)

{

  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);

  gst_element_class_add_pad_template (element_class,

      gst_static_pad_template_get (&gst_smokeenc_sink_pad_template));

  gst_element_class_add_pad_template (element_class,

      gst_static_pad_template_get (&gst_smokeenc_src_pad_template));

  gst_element_class_set_details (element_class, &gst_smokeenc_details);

}

static void

gst_smokeenc_class_init (GstSmokeEnc * klass)

{

  GObjectClass *gobject_class;

  GstElementClass *gstelement_class;

  gobject_class = (GObjectClass *) klass;

  gstelement_class = (GstElementClass *) klass;

  parent_class = g_type_class_peek_parent (klass);

  gobject_class->set_property = gst_smokeenc_set_property;

  gobject_class->get_property = gst_smokeenc_get_property;

  g_object_class_install_property (gobject_class, ARG_MIN_QUALITY,

      g_param_spec_int ("qmin", "Qmin", "Minimum quality",

          0, 100, SMOKEENC_DEFAULT_MIN_QUALITY, G_PARAM_READWRITE));

  g_object_class_install_property (gobject_class, ARG_MAX_QUALITY,

      g_param_spec_int ("qmax", "Qmax", "Maximum quality",

          0, 100, SMOKEENC_DEFAULT_MAX_QUALITY, G_PARAM_READWRITE));

  g_object_class_install_property (gobject_class, ARG_THRESHOLD,

      g_param_spec_int ("threshold", "Threshold", "Motion estimation threshold",

          0, 100000000, SMOKEENC_DEFAULT_THRESHOLD, G_PARAM_READWRITE));

  g_object_class_install_property (gobject_class, ARG_KEYFRAME,

      g_param_spec_int ("keyframe", "Keyframe",

          "Insert keyframe every N frames", 1, 100000,

          SMOKEENC_DEFAULT_KEYFRAME, G_PARAM_READWRITE));

  GST_DEBUG_CATEGORY_INIT (smokeenc_debug, "smokeenc", 0,

      "Smoke encoding element");

}

static void

gst_smokeenc_init (GstSmokeEnc * smokeenc)

{

  /* create the sink and src pads */

  smokeenc->sinkpad =

      gst_pad_new_from_static_template (&gst_smokeenc_sink_pad_template,

      "sink");

  gst_pad_set_chain_function (smokeenc->sinkpad, gst_smokeenc_chain);

  gst_pad_set_getcaps_function (smokeenc->sinkpad, gst_smokeenc_getcaps);

  gst_pad_set_setcaps_function (smokeenc->sinkpad, gst_smokeenc_setcaps);

  gst_element_add_pad (GST_ELEMENT (smokeenc), smokeenc->sinkpad);

  smokeenc->srcpad =

      gst_pad_new_from_static_template (&gst_smokeenc_src_pad_template, "src");

  gst_pad_set_getcaps_function (smokeenc->sinkpad, gst_smokeenc_getcaps);

  gst_pad_use_fixed_caps (smokeenc->sinkpad);

  /*gst_pad_set_link_function (smokeenc->sinkpad, gst_smokeenc_link); */

  gst_element_add_pad (GST_ELEMENT (smokeenc), smokeenc->srcpad);

  /* reset the initial video state */

  smokeenc->width = 0;

  smokeenc->height = 0;

  smokeenc->frame = 0;

  smokeenc->need_header = TRUE;

  gst_smokeenc_resync (smokeenc);

  smokeenc->min_quality = SMOKEENC_DEFAULT_MIN_QUALITY;

  smokeenc->max_quality = SMOKEENC_DEFAULT_MAX_QUALITY;

  smokeenc->threshold = SMOKEENC_DEFAULT_THRESHOLD;

  smokeenc->keyframe = SMOKEENC_DEFAULT_KEYFRAME;

}

static GstCaps *

gst_smokeenc_getcaps (GstPad * pad)

{

  GstSmokeEnc *smokeenc = GST_SMOKEENC (gst_pad_get_parent (pad));

  GstPad *otherpad;

  GstCaps *caps;

  const char *name;

  int i;

  GstStructure *structure = NULL;

  /* we want to proxy properties like width, height and framerate from the

     other end of the element */

  otherpad = (pad == smokeenc->srcpad) ? smokeenc->sinkpad : smokeenc->srcpad;

  caps = gst_pad_get_allowed_caps (otherpad);

  if (pad == smokeenc->srcpad) {

    name = "image/x-smoke";

  } else {

    name = "video/x-raw-yuv";

  }

  for (i = 0; i < gst_caps_get_size (caps); i++) {

    structure = gst_caps_get_structure (caps, i);

    gst_structure_set_name (structure, name);

    gst_structure_remove_field (structure, "format");

    /* ... but for the sink pad, we only do I420 anyway, so add that */

    if (pad == smokeenc->sinkpad) {

      gst_structure_set (structure, "format", GST_TYPE_FOURCC,

          GST_STR_FOURCC ("I420"), NULL);

    }

  }

  gst_object_unref (smokeenc);

  return caps;

}

static gboolean

gst_smokeenc_setcaps (GstPad * pad, GstCaps * caps)

{

  GstSmokeEnc *smokeenc = GST_SMOKEENC (gst_pad_get_parent (pad));

  GstStructure *structure;

  gboolean ret = TRUE;

  GstCaps *othercaps;

  GstPad *otherpad;

  const GValue *framerate;

  otherpad = (pad == smokeenc->srcpad) ? smokeenc->sinkpad : smokeenc->srcpad;

  structure = gst_caps_get_structure (caps, 0);

  framerate = gst_structure_get_value (structure, "framerate");

  if (framerate) {

    smokeenc->fps_num = gst_value_get_fraction_numerator (framerate);

    smokeenc->fps_denom = gst_value_get_fraction_denominator (framerate);

  } else {

    smokeenc->fps_num = 0;

    smokeenc->fps_denom = 1;

  }

  gst_structure_get_int (structure, "width", &smokeenc->width);

  gst_structure_get_int (structure, "height", &smokeenc->height);

  othercaps = gst_caps_copy (gst_pad_get_pad_template_caps (otherpad));

  gst_caps_set_simple (othercaps,

      "width", G_TYPE_INT, smokeenc->width,

      "height", G_TYPE_INT, smokeenc->height,

      "framerate", GST_TYPE_FRACTION, smokeenc->fps_num, smokeenc->fps_denom,

      NULL);

  ret = gst_pad_set_caps (smokeenc->srcpad, othercaps);

  gst_caps_unref (othercaps);

  if (GST_PAD_LINK_SUCCESSFUL (ret)) {

    gst_smokeenc_resync (smokeenc);

  }

  gst_object_unref (smokeenc);

  return ret;

}

static void

gst_smokeenc_resync (GstSmokeEnc * smokeenc)

{

  GST_DEBUG ("gst_smokeenc_resync: resync");

  smokecodec_encode_new (&smokeenc->info, smokeenc->width, smokeenc->height,

      smokeenc->fps_num, smokeenc->fps_denom);

  smokecodec_set_quality (smokeenc->info, smokeenc->min_quality,

      smokeenc->max_quality);

  GST_DEBUG ("gst_smokeenc_resync: resync done");

}

static GstFlowReturn

gst_smokeenc_chain (GstPad * pad, GstBuffer * buf)

{

  GstSmokeEnc *smokeenc;

  guchar *data, *outdata;

  gulong size;

  gint outsize;

  guint encsize;

  GstBuffer *outbuf;

  SmokeCodecFlags flags;

  GstFlowReturn ret;

  smokeenc = GST_SMOKEENC (GST_OBJECT_PARENT (pad));

  data = GST_BUFFER_DATA (buf);

  size = GST_BUFFER_SIZE (buf);

  GST_DEBUG ("gst_smokeenc_chain: got buffer of %ld bytes in '%s'", size,

      GST_OBJECT_NAME (smokeenc));

  if (smokeenc->need_header) {

    outbuf = gst_buffer_new ();

    outsize = 256;

    outdata = g_malloc (outsize);

    GST_BUFFER_DATA (outbuf) = outdata;

    GST_BUFFER_MALLOCDATA (outbuf) = outdata;

    GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);

    GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buf);

    smokecodec_encode_id (smokeenc->info, outdata, &encsize);

    GST_BUFFER_SIZE (outbuf) = encsize;

    ret = gst_pad_push (smokeenc->srcpad, outbuf);

    smokeenc->need_header = FALSE;

  }

  outbuf = gst_buffer_new ();

  outsize = smokeenc->width * smokeenc->height * 3;

  outdata = g_malloc (outsize);

  GST_BUFFER_DATA (outbuf) = outdata;

  GST_BUFFER_MALLOCDATA (outbuf) = outdata;

  GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);

  GST_BUFFER_DURATION (outbuf) =

      smokeenc->fps_denom * GST_SECOND / smokeenc->fps_num;

  flags = 0;

  if ((smokeenc->frame % smokeenc->keyframe) == 0) {

    flags |= SMOKECODEC_KEYFRAME;

  }

  smokecodec_set_quality (smokeenc->info, smokeenc->min_quality,

      smokeenc->max_quality);

  smokecodec_set_threshold (smokeenc->info, smokeenc->threshold);

  smokecodec_encode (smokeenc->info, data, flags, outdata, &encsize);

  gst_buffer_unref (buf);

  GST_BUFFER_SIZE (outbuf) = encsize;

  GST_BUFFER_OFFSET (outbuf) = smokeenc->frame;

  GST_BUFFER_OFFSET_END (outbuf) = smokeenc->frame + 1;

  ret = gst_pad_push (smokeenc->srcpad, outbuf);

  smokeenc->frame++;

  return ret;

}

static void

gst_smokeenc_set_property (GObject * object, guint prop_id,

    const GValue * value, GParamSpec * pspec)

{

  GstSmokeEnc *smokeenc;

  g_return_if_fail (GST_IS_SMOKEENC (object));

  smokeenc = GST_SMOKEENC (object);

  switch (prop_id) {

    case ARG_MIN_QUALITY:

      smokeenc->min_quality = g_value_get_int (value);

      break;

    case ARG_MAX_QUALITY:

      smokeenc->max_quality = g_value_get_int (value);

      break;

    case ARG_THRESHOLD:

      smokeenc->threshold = g_value_get_int (value);

      break;

    case ARG_KEYFRAME:

      smokeenc->keyframe = g_value_get_int (value);

      break;

    default:

      break;

  }

}

static void

gst_smokeenc_get_property (GObject * object, guint prop_id, GValue * value,

    GParamSpec * pspec)

{

  GstSmokeEnc *smokeenc;

  g_return_if_fail (GST_IS_SMOKEENC (object));

  smokeenc = GST_SMOKEENC (object);

  switch (prop_id) {

    case ARG_MIN_QUALITY:

      g_value_set_int (value, smokeenc->min_quality);

      break;

    case ARG_MAX_QUALITY:

      g_value_set_int (value, smokeenc->max_quality);

      break;

    case ARG_THRESHOLD:

      g_value_set_int (value, smokeenc->threshold);

      break;

    case ARG_KEYFRAME:

      g_value_set_int (value, smokeenc->keyframe);

      break;

    default:

      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

      break;

  }

}