gstreamer/ext/divx/gstdivxdec.c

/* GStreamer divx decoder plugin
 * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
 *
 * 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 "gstdivxdec.h"
#include <gst/video/video.h>

/* elementfactory information */
GstElementDetails gst_divxdec_details = {
  "Divx4linux decoder",
  "Codec/Video/Decoder",
  "Divx decoder based on divxdecore",
  "Ronald Bultje <rbultje@ronald.bitfreak.net>"
};

static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("video/x-divx, "
	"divxversion = (int) [ 3, 5 ], "
	"width = (int) [ 16, 4096 ], "
	"height = (int) [ 16, 4096 ], " "framerate = (double) [ 0, MAX ]")
    );

static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ I420, YUY2, YV12, UYVY }")
	/* FIXME: 15/16/24/32bpp RGB */
    )
    );


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

enum
{
  ARG_0
      /* FILL ME */
};


static void gst_divxdec_base_init (GstDivxDecClass * klass);
static void gst_divxdec_class_init (GstDivxDecClass * klass);
static void gst_divxdec_init (GstDivxDec * divxdec);
static void gst_divxdec_dispose (GObject * object);
static void gst_divxdec_chain (GstPad * pad, GstData * data);
static GstPadLinkReturn gst_divxdec_connect (GstPad * pad,
    const GstCaps * vscapslist);
static GstPadLinkReturn gst_divxdec_negotiate (GstDivxDec * divxdec);

static GstElementClass *parent_class = NULL;

/* static guint gst_divxdec_signals[LAST_SIGNAL] = { 0 }; */


static gchar *
gst_divxdec_error (int errorcode)
{
  gchar *error;

  switch (errorcode) {
    case DEC_OK:
      error = "No error";
      break;
    case DEC_MEMORY:
      error = "Invalid memory";
      break;
    case DEC_BAD_FORMAT:
      error = "Invalid format";
      break;
    case DEC_INVALID_ARGUMENT:
      error = "Invalid argument";
      break;
    case DEC_NOT_IMPLEMENTED:
      error = "Not implemented";
      break;
    default:
      error = "Unknown error";
      break;
  }

  return error;
}

GType
gst_divxdec_get_type (void)
{
  static GType divxdec_type = 0;

  if (!divxdec_type) {
    static const GTypeInfo divxdec_info = {
      sizeof (GstDivxDecClass),
      (GBaseInitFunc) gst_divxdec_base_init,
      NULL,
      (GClassInitFunc) gst_divxdec_class_init,
      NULL,
      NULL,
      sizeof (GstDivxDec),
      0,
      (GInstanceInitFunc) gst_divxdec_init,
    };
    divxdec_type = g_type_register_static (GST_TYPE_ELEMENT,
	"GstDivxDec", &divxdec_info, 0);
  }
  return divxdec_type;
}


static void
gst_divxdec_base_init (GstDivxDecClass * klass)
{
  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);

  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&sink_template));
  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&src_template));

  gst_element_class_set_details (element_class, &gst_divxdec_details);
}


static void
gst_divxdec_class_init (GstDivxDecClass * klass)
{
  GObjectClass *gobject_class = (GObjectClass *) klass;

  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);

  gobject_class->dispose = gst_divxdec_dispose;
}


static void
gst_divxdec_init (GstDivxDec * divxdec)
{
  /* create the sink pad */
  divxdec->sinkpad =
      gst_pad_new_from_template (gst_static_pad_template_get (&sink_template),
      "sink");
  gst_element_add_pad (GST_ELEMENT (divxdec), divxdec->sinkpad);
  gst_pad_set_chain_function (divxdec->sinkpad, gst_divxdec_chain);
  gst_pad_set_link_function (divxdec->sinkpad, gst_divxdec_connect);

  /* create the src pad */
  divxdec->srcpad =
      gst_pad_new_from_template (gst_static_pad_template_get (&src_template),
      "src");
  gst_element_add_pad (GST_ELEMENT (divxdec), divxdec->srcpad);
  gst_pad_use_explicit_caps (divxdec->srcpad);

  /* bitrate, etc. */
  divxdec->width = divxdec->height = divxdec->csp = divxdec->bitcnt = -1;
  divxdec->version = 0;

  /* set divx handle to NULL */
  divxdec->handle = NULL;
}


static void
gst_divxdec_unset (GstDivxDec * divxdec)
{
  if (divxdec->handle) {
    /* unref this instance */
    decore (divxdec->handle, DEC_OPT_RELEASE, NULL, NULL);
    divxdec->handle = NULL;
  }
}


static gboolean
gst_divxdec_setup (GstDivxDec * divxdec)
{
  void *handle;
  DEC_INIT xinit;
  DivXBitmapInfoHeader output;
  int ret;

  /* initialize the handle */
  memset (&xinit, 0, sizeof (DEC_INIT));
  xinit.smooth_playback = 0;
  switch (divxdec->version) {
    case 3:
      xinit.codec_version = 311;
      break;
    case 4:
      xinit.codec_version = 400;
      break;
    case 5:
      xinit.codec_version = 500;
      break;
    default:
      xinit.codec_version = 0;
      break;
  }
  if ((ret = decore (&handle, DEC_OPT_INIT, &xinit, NULL)) != 0) {
    GST_ELEMENT_ERROR (divxdec, LIBRARY, INIT, (NULL),
	("divx library error: %s (%d)", gst_divxdec_error (ret), ret));
    return FALSE;
  }

  /* we've got a handle now */
  divxdec->handle = handle;

  /* initialise parameters, see divx documentation */
  memset (&output, 0, sizeof (DivXBitmapInfoHeader));
  output.biSize = sizeof (DivXBitmapInfoHeader);
  output.biWidth = divxdec->width;
  output.biHeight = divxdec->height;
  output.biBitCount = divxdec->bitcnt;
  output.biCompression = divxdec->csp;

  if ((ret = decore (divxdec->handle, DEC_OPT_SETOUT, &output, NULL)) != 0) {
    GST_ELEMENT_ERROR (divxdec, LIBRARY, SETTINGS, (NULL),
	("error setting output: %s (%d)", gst_divxdec_error (ret), ret));
    gst_divxdec_unset (divxdec);
    return FALSE;
  }

  return TRUE;
}


static void
gst_divxdec_dispose (GObject * object)
{
  GstDivxDec *divxdec = GST_DIVXDEC (object);

  gst_divxdec_unset (divxdec);
}


static void
gst_divxdec_chain (GstPad * pad, GstData * _data)
{
  GstBuffer *buf = GST_BUFFER (_data);
  GstDivxDec *divxdec;
  GstBuffer *outbuf;
  DEC_FRAME xframe;
  int ret;

  g_return_if_fail (pad != NULL);
  g_return_if_fail (GST_IS_PAD (pad));
  g_return_if_fail (buf != NULL);

  divxdec = GST_DIVXDEC (GST_OBJECT_PARENT (pad));

  if (!divxdec->handle) {
    if (gst_divxdec_negotiate (divxdec) <= 0) {
      GST_ELEMENT_ERROR (divxdec, CORE, TOO_LAZY, (NULL),
	  ("No format set - aborting"));
      gst_buffer_unref (buf);
      return;
    }
  }

  outbuf = gst_buffer_new_and_alloc (divxdec->width *
      divxdec->height * divxdec->bpp / 8);
  GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
  GST_BUFFER_SIZE (outbuf) = divxdec->width *
      divxdec->height * divxdec->bpp / 8;

  /* encode and so ... */
  xframe.bitstream = (void *) GST_BUFFER_DATA (buf);
  xframe.bmp = (void *) GST_BUFFER_DATA (outbuf);
  xframe.length = GST_BUFFER_SIZE (buf);
  xframe.stride = 0;
  xframe.render_flag = 1;

  if ((ret = decore (divxdec->handle, DEC_OPT_FRAME, &xframe, NULL))) {
    GST_ELEMENT_ERROR (divxdec, STREAM, DECODE, (NULL),
	("Error decoding divx frame: %s (%d)", gst_divxdec_error (ret), ret));
    gst_buffer_unref (buf);
    return;
  }

  gst_pad_push (divxdec->srcpad, GST_DATA (outbuf));
  gst_buffer_unref (buf);
}


/* FIXME: moved all the bits out here that are broken so the syntax
 * stays clear */

/*
{
  GST_MAKE_FOURCC ('R', 'G', 'B', ' '), 32, 32,
#if (G_BYTE_ORDER == G_BIG_ENDIAN)
GST_MAKE_FOURCC ('A', 'B', 'G', 'R'), 32}

,
#else
0, 32}

,
#endif
{
  GST_MAKE_FOURCC ('R', 'G', 'B', ' '), 24, 24,
#if (G_BYTE_ORDER == G_BIG_ENDIAN)
GST_MAKE_FOURCC ('A', 'B', 'G', 'R'), 24}

,
#else
0, 24}

,
#endif
{
GST_MAKE_FOURCC ('R', 'G', 'B', ' '), 16, 16, 3, 16}

, {
GST_MAKE_FOURCC ('R', 'G', 'B', ' '), 15, 16, 0, 16}

,
#endif
    if (fmt_list[i].fourcc == GST_MAKE_FOURCC ('R', 'G', 'B', ' ')) {
  guint32 r_mask = 0, b_mask = 0, g_mask = 0;
  gint endianness = 0;

  switch (fmt_list[i].depth) {
    case 15:
      endianness = G_BYTE_ORDER;
      r_mask = 0xf800;
      g_mask = 0x07c0;
      b_mask = 0x003e;
      break;
    case 16:
      endianness = G_BYTE_ORDER;
      r_mask = 0xf800;
      g_mask = 0x07e0;
      b_mask = 0x001f;
      break;
    case 24:
      endianness = G_BIG_ENDIAN;
      r_mask = GST_VIDEO_BYTE1_MASK_24_INT;
      g_mask = GST_VIDEO_BYTE2_MASK_24_INT;
      b_mask = GST_VIDEO_BYTE3_MASK_24_INT break;
    case 32:
      endianness = G_BIG_ENDIAN;
      r_mask = GST_VIDEO_BYTE1_MASK_32_INT;
      g_mask = GST_VIDEO_BYTE2_MASK_32_INT;
      b_mask = GST_VIDEO_BYTE3_MASK_32_INT break;
  }
  caps = GST_CAPS_NEW ("divxdec_src_pad_rgb",
      "video/x-raw-rgb",
      "width", GST_PROPS_INT (divxdec->width),
      "height", GST_PROPS_INT (divxdec->height),
      "framerate", GST_PROPS_FLOAT (divxdec->fps),
      "depth", GST_PROPS_INT (fmt_list[i].depth),
      "bpp", GST_PROPS_INT (fmt_list[i].bpp),
      "endianness", GST_PROPS_INT (endianness),
      "red_mask", GST_PROPS_INT (r_mask),
      "green_mask", GST_PROPS_INT (g_mask),
      "blue_mask", GST_PROPS_INT (b_mask));
} else {
#endif

#endif
*/

static GstPadLinkReturn
gst_divxdec_negotiate (GstDivxDec * divxdec)
{
  GstCaps *caps;
  struct
  {
    guint32 fourcc;
    gint depth, bpp;
    guint32 csp;
    gint bitcnt;
  } fmt_list[] = {
    {
    GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'), 16, 16,
	  GST_MAKE_FOURCC ('Y', 'U', 'Y', '2'), 0}, {
    GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'), 16, 16,
	  GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'), 0}, {
    GST_MAKE_FOURCC ('I', '4', '2', '0'), 12, 12,
	  GST_MAKE_FOURCC ('I', '4', '2', '0'), 0}, {
    GST_MAKE_FOURCC ('Y', 'V', '1', '2'), 12, 12,
	  GST_MAKE_FOURCC ('Y', 'V', '1', '2'), 0}, {
    0, 0, 0, 0, 0}
  };
  gint i;

  for (i = 0; fmt_list[i].fourcc != 0; i++) {
    divxdec->csp = fmt_list[i].csp;

    caps = gst_caps_new_simple ("video/x-raw-yuv",
	"width", G_TYPE_INT, divxdec->width,
	"height", G_TYPE_INT, divxdec->height,
	"framerate", G_TYPE_DOUBLE, divxdec->fps,
	"format", GST_TYPE_FOURCC, fmt_list[i].fourcc, NULL);

    if (gst_divxdec_setup (divxdec) &&
	gst_pad_set_explicit_caps (divxdec->srcpad, caps)) {
      divxdec->csp = fmt_list[i].csp;
      divxdec->bpp = fmt_list[i].bpp;
      divxdec->bitcnt = fmt_list[i].bitcnt;
      return GST_PAD_LINK_OK;
    }
  }

  /* if we got here - it's not good */
  return GST_PAD_LINK_REFUSED;
}


static GstPadLinkReturn
gst_divxdec_connect (GstPad * pad, const GstCaps * caps)
{
  GstDivxDec *divxdec;
  GstStructure *structure = gst_caps_get_structure (caps, 0);

  divxdec = GST_DIVXDEC (gst_pad_get_parent (pad));

  /* if there's something old around, remove it */
  if (divxdec->handle) {
    gst_divxdec_unset (divxdec);
  }

  /* we are not going to act on variable caps */
  if (!gst_caps_is_fixed (caps))
    return GST_PAD_LINK_DELAYED;

  /* if we get here, we know the input is divx. we
   * only need to bother with the output colorspace */
  gst_structure_get_int (structure, "width", &divxdec->width);
  gst_structure_get_int (structure, "height", &divxdec->height);
  gst_structure_get_double (structure, "framerate", &divxdec->fps);
  gst_structure_get_int (structure, "divxversion", &divxdec->version);

  return gst_divxdec_negotiate (divxdec);
}


static gboolean
plugin_init (GstPlugin * plugin)
{
  int lib_version;

  lib_version = decore (NULL, DEC_OPT_VERSION, 0, 0);
  if (lib_version != DECORE_VERSION) {
    g_warning ("Version mismatch! This plugin was compiled for "
	"DivX version %d, while your library has version %d!",
	DECORE_VERSION, lib_version);
    return FALSE;
  }

  /* create an elementfactory for the v4lmjpegsrcparse element */
  return gst_element_register (plugin, "divxdec",
      GST_RANK_SECONDARY, GST_TYPE_DIVXDEC);
}


GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
    GST_VERSION_MINOR,
    "divxdec",
    "DivX decoder",
    plugin_init,
    "5.03", GST_LICENSE_UNKNOWN, "divx4linux", "http://www.divx.com/");