gstreamer/gst/modplug/gstmodplug.cc

/* 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.
 */

/* 
   Code based on modplugxmms
   XMMS plugin:
     Kenton Varda <temporal@gauge3d.org>
   Sound Engine:
     Olivier Lapicque <olivierl@jps.net>  
*/

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

#include "libmodplug/stdafx.h"
#include "libmodplug/sndfile.h"

#include "gstmodplug.h"

#include <gst/gst.h>
#include <stdlib.h>
#include <gst/audio/audio.h>

/* elementfactory information */
GstElementDetails modplug_details = {
  "ModPlug",
  "Codec/Decoder/Audio",
  "Module decoder based on modplug engine",
  "Jeremy SIMON <jsimon13@yahoo.fr>"
};


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

enum
{
  ARG_0,
  ARG_SONGNAME,
  ARG_REVERB,
  ARG_REVERB_DEPTH,
  ARG_REVERB_DELAY,
  ARG_MEGABASS,
  ARG_MEGABASS_AMOUNT,
  ARG_MEGABASS_RANGE,
  ARG_NOISE_REDUCTION,
  ARG_SURROUND,
  ARG_SURROUND_DEPTH,
  ARG_SURROUND_DELAY,
  ARG_OVERSAMP
};

static GstStaticPadTemplate modplug_src_template_factory =
    GST_STATIC_PAD_TEMPLATE ("src",
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("audio/x-raw-int, " "endianness = (int) BYTE_ORDER, " "signed = (boolean) TRUE, " "width = (int) 16, " "depth = (int) 16, " "rate = (int) { 8000, 11025, 22050, 44100 }, " /* FIXME? */
        "channels = (int) [ 1, 2 ]; " "audio/x-raw-int, " "endianness = (int) BYTE_ORDER, " "signed = (boolean) FALSE, " "width = (int) 8, " "depth = (int) 8, " "rate = (int) { 8000, 11025, 22050, 44100 }, " /* FIXME? */
        "channels = (int) [ 1, 2 ]")
    );

static GstStaticPadTemplate modplug_sink_template_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("audio/x-mod")
    );

enum
{
  MODPLUG_STATE_NEED_TUNE = 1,
  MODPLUG_STATE_LOAD_TUNE = 2,
  MODPLUG_STATE_PLAY_TUNE = 3
};

static void gst_modplug_base_init (GstModPlugClass * klass);
static void gst_modplug_class_init (GstModPlugClass * klass);
static void gst_modplug_init (GstModPlug * filter);
static void gst_modplug_set_property (GObject * object,
    guint id, const GValue * value, GParamSpec * pspec);
static void gst_modplug_get_property (GObject * object,
    guint id, GValue * value, GParamSpec * pspec);
static GstPadLinkReturn
gst_modplug_srclink (GstPad * pad, const GstCaps * caps);
static GstCaps *gst_modplug_fixate (GstPad * pad, const GstCaps * caps);
static void gst_modplug_loop (GstElement * element);
static void gst_modplug_setup (GstModPlug * modplug);
static const GstFormat *gst_modplug_get_formats (GstPad * pad);
static const GstQueryType *gst_modplug_get_query_types (GstPad * pad);
static gboolean gst_modplug_src_event (GstPad * pad, GstEvent * event);
static gboolean gst_modplug_src_query (GstPad * pad,
    GstQueryType type, GstFormat * format, gint64 * value);
static GstStateChangeReturn gst_modplug_change_state (GstElement * element,
    GstStateChange transition);

static GstElementClass *parent_class = NULL;

GType
gst_modplug_get_type (void)
{
  static GType modplug_type = 0;

  if (!modplug_type) {
    static const GTypeInfo modplug_info = {
      sizeof (GstModPlugClass),
      (GBaseInitFunc) gst_modplug_base_init,
      NULL,
      (GClassInitFunc) gst_modplug_class_init,
      NULL,
      NULL,
      sizeof (GstModPlug),
      0,
      (GInstanceInitFunc) gst_modplug_init,
      NULL
    };

    modplug_type =
        g_type_register_static (GST_TYPE_ELEMENT, "GstModPlug", &modplug_info,
        (GTypeFlags) 0);
  }
  return modplug_type;
}

static void
gst_modplug_base_init (GstModPlugClass * klass)
{
  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);

  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&modplug_sink_template_factory));
  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&modplug_src_template_factory));
  gst_element_class_set_details (element_class, &modplug_details);
}

static void
gst_modplug_class_init (GstModPlugClass * klass)
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;

  gobject_class = (GObjectClass *) klass;
  gstelement_class = (GstElementClass *) klass;

  parent_class = GST_ELEMENT_CLASS (g_type_class_ref (GST_TYPE_ELEMENT));

  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SONGNAME,
      g_param_spec_string ("songname", "Songname", "The song name",
          "", G_PARAM_READABLE));

  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_REVERB,
      g_param_spec_boolean ("reverb", "reverb", "reverb",
          FALSE, (GParamFlags) G_PARAM_READWRITE));

  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_REVERB_DEPTH,
      g_param_spec_int ("reverb_depth", "reverb_depth", "reverb_depth",
          0, 100, 30, (GParamFlags) G_PARAM_READWRITE));

  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_REVERB_DELAY,
      g_param_spec_int ("reverb_delay", "reverb_delay", "reverb_delay",
          0, 200, 100, (GParamFlags) G_PARAM_READWRITE));

  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MEGABASS,
      g_param_spec_boolean ("megabass", "megabass", "megabass",
          FALSE, (GParamFlags) G_PARAM_READWRITE));

  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MEGABASS_AMOUNT,
      g_param_spec_int ("megabass_amount", "megabass_amount", "megabass_amount",
          0, 100, 40, (GParamFlags) G_PARAM_READWRITE));

  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MEGABASS_RANGE,
      g_param_spec_int ("megabass_range", "megabass_range", "megabass_range",
          0, 100, 30, (GParamFlags) G_PARAM_READWRITE));

  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SURROUND,
      g_param_spec_boolean ("surround", "surround", "surround",
          TRUE, (GParamFlags) G_PARAM_READWRITE));

  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SURROUND_DEPTH,
      g_param_spec_int ("surround_depth", "surround_depth", "surround_depth",
          0, 100, 20, (GParamFlags) G_PARAM_READWRITE));

  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SURROUND_DELAY,
      g_param_spec_int ("surround_delay", "surround_delay", "surround_delay",
          0, 40, 20, (GParamFlags) G_PARAM_READWRITE));

  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_OVERSAMP,
      g_param_spec_boolean ("oversamp", "oversamp", "oversamp",
          TRUE, (GParamFlags) G_PARAM_READWRITE));

  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NOISE_REDUCTION,
      g_param_spec_boolean ("noise_reduction", "noise_reduction",
          "noise_reduction", TRUE, (GParamFlags) G_PARAM_READWRITE));

  gobject_class->set_property = gst_modplug_set_property;
  gobject_class->get_property = gst_modplug_get_property;

  gstelement_class->change_state = gst_modplug_change_state;
}

static void
gst_modplug_init (GstModPlug * modplug)
{
  modplug->sinkpad =
      gst_pad_new_from_template (gst_static_pad_template_get
      (&modplug_sink_template_factory), "sink");
  gst_element_add_pad (GST_ELEMENT (modplug), modplug->sinkpad);

  modplug->srcpad =
      gst_pad_new_from_template (gst_static_pad_template_get
      (&modplug_src_template_factory), "src");
  gst_pad_set_link_function (modplug->srcpad, gst_modplug_srclink);
  gst_pad_set_fixate_function (modplug->srcpad, gst_modplug_fixate);
  gst_pad_set_event_function (modplug->srcpad,
      (GstPadEventFunction) GST_DEBUG_FUNCPTR (gst_modplug_src_event));
  gst_pad_set_query_function (modplug->srcpad, gst_modplug_src_query);
  gst_pad_set_query_type_function (modplug->srcpad, (GstPadQueryTypeFunction)
      GST_DEBUG_FUNCPTR (gst_modplug_get_query_types));
  gst_pad_set_formats_function (modplug->srcpad,
      (GstPadFormatsFunction) GST_DEBUG_FUNCPTR (gst_modplug_get_formats));
  gst_element_add_pad (GST_ELEMENT (modplug), modplug->srcpad);

  gst_element_set_loop_function (GST_ELEMENT (modplug), gst_modplug_loop);

  modplug->reverb = FALSE;
  modplug->reverb_depth = 30;
  modplug->reverb_delay = 100;
  modplug->megabass = FALSE;
  modplug->megabass_amount = 40;
  modplug->megabass_range = 30;
  modplug->surround = TRUE;
  modplug->surround_depth = 20;
  modplug->surround_delay = 20;
  modplug->oversamp = TRUE;
  modplug->noise_reduction = TRUE;

  modplug->_16bit = TRUE;
  modplug->channel = 2;
  modplug->frequency = 44100;
  modplug->audiobuffer = NULL;
  modplug->buffer_in = NULL;

  modplug->state = MODPLUG_STATE_NEED_TUNE;
  GST_FLAG_SET (modplug, GST_ELEMENT_EVENT_AWARE);
}

static void
gst_modplug_setup (GstModPlug * modplug)
{
  if (modplug->_16bit)
    modplug->mSoundFile->SetWaveConfig (modplug->frequency, 16,
        modplug->channel);
  else
    modplug->mSoundFile->SetWaveConfig (modplug->frequency, 8,
        modplug->channel);

  modplug->mSoundFile->SetWaveConfigEx (modplug->surround, !modplug->oversamp,
      modplug->reverb, true, modplug->megabass, modplug->noise_reduction, true);
  modplug->mSoundFile->SetResamplingMode (SRCMODE_POLYPHASE);

  if (modplug->surround)
    modplug->mSoundFile->SetSurroundParameters (modplug->surround_depth,
        modplug->surround_delay);

  if (modplug->megabass)
    modplug->mSoundFile->SetXBassParameters (modplug->megabass_amount,
        modplug->megabass_range);

  if (modplug->reverb)
    modplug->mSoundFile->SetReverbParameters (modplug->reverb_depth,
        modplug->reverb_delay);

}

static const GstFormat *
gst_modplug_get_formats (GstPad * pad)
{
  static const GstFormat src_formats[] = {
/*    GST_FORMAT_BYTES,
    GST_FORMAT_DEFAULT,*/
    GST_FORMAT_TIME,
    (GstFormat) 0
  };
  static const GstFormat sink_formats[] = {
    /*GST_FORMAT_BYTES, */
    GST_FORMAT_TIME,
    (GstFormat) 0
  };

  return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
}

static const GstQueryType *
gst_modplug_get_query_types (GstPad * pad)
{
  static const GstQueryType gst_modplug_src_query_types[] = {
    GST_QUERY_TOTAL,
    GST_QUERY_POSITION,
    (GstQueryType) 0
  };

  return gst_modplug_src_query_types;
}


static gboolean
gst_modplug_src_query (GstPad * pad, GstQueryType type,
    GstFormat * format, gint64 * value)
{
  gboolean res = TRUE;
  GstModPlug *modplug;
  gfloat tmp;

  modplug = GST_MODPLUG (gst_pad_get_parent (pad));

  switch (type) {
    case GST_QUERY_TOTAL:
      switch (*format) {
        case GST_FORMAT_TIME:
          *value = (gint64) modplug->mSoundFile->GetSongTime () * GST_SECOND;
          break;
        default:
          res = FALSE;
          break;
      }
      break;
    case GST_QUERY_POSITION:
      switch (*format) {
        case GST_FORMAT_TIME:
          tmp =
              ((float) (modplug->mSoundFile->GetSongTime () *
                  modplug->mSoundFile->GetCurrentPos ()) /
              (float) modplug->mSoundFile->GetMaxPosition ());
          *value = (gint64) (tmp * GST_SECOND);
          break;
        default:
          res = FALSE;
          break;
      }
      break;
    default:
      res = FALSE;
      break;
  }

  return res;
}


static gboolean
gst_modplug_src_event (GstPad * pad, GstEvent * event)
{
  gboolean res = TRUE;
  GstModPlug *modplug;

  modplug = GST_MODPLUG (gst_pad_get_parent (pad));

  switch (GST_EVENT_TYPE (event)) {
      /* the all-formats seek logic */
    case GST_EVENT_SEEK:
    {
      gboolean flush;
      GstFormat format;

      format = GST_FORMAT_TIME;

      /* shave off the flush flag, we'll need it later */
      flush = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;

      modplug->seek_at = GST_EVENT_SEEK_OFFSET (event);
      break;
    }
    default:
      res = FALSE;
      break;
  }

  gst_event_unref (event);

  return res;
}

#if 0
static GstCaps *
gst_modplug_get_streaminfo (GstModPlug * modplug)
{
  GstCaps *caps;

  props = gst_props_empty_new ();

  entry =
      gst_props_entry_new ("Patterns",
      G_TYPE_INT ((gint) modplug->mSoundFile->GetNumPatterns ()));
  gst_props_add_entry (props, (GstPropsEntry *) entry);

  caps = gst_caps_new_simple ("application/x-gst-streaminfo", NULL);
  return caps;
}


static void
gst_modplug_update_info (GstModPlug * modplug)
{
  if (modplug->streaminfo) {
    gst_caps_unref (modplug->streaminfo);
  }

  modplug->streaminfo = gst_modplug_get_streaminfo (modplug);
  g_object_notify (G_OBJECT (modplug), "streaminfo");
}

static void
gst_modplug_update_metadata (GstModPlug * modplug)
{
  GstProps *props;
  GstPropsEntry *entry;
  const gchar *title;

  props = gst_props_empty_new ();

  title = modplug->mSoundFile->GetTitle ();
  entry = gst_props_entry_new ("Title", G_TYPE_STRING (title));
  gst_props_add_entry (props, entry);

  modplug->metadata = gst_caps_new_simple ("application/x-gst-metadata", NULL);

  g_object_notify (G_OBJECT (modplug), "metadata");
}
#endif

static GstPadLinkReturn
gst_modplug_srclink (GstPad * pad, const GstCaps * caps)
{
  GstModPlug *modplug;
  GstStructure *structure;
  gint depth;

  modplug = GST_MODPLUG (gst_pad_get_parent (pad));

  structure = gst_caps_get_structure (caps, 0);

  gst_structure_get_int (structure, "depth", &depth);
  modplug->_16bit = (depth == 16);
  gst_structure_get_int (structure, "channels", &modplug->channel);
  gst_structure_get_int (structure, "rate", &modplug->frequency);

  modplug->length = 1152 * modplug->channel * depth / 8;
  gst_modplug_setup (modplug);

  return GST_PAD_LINK_OK;
}

static GstCaps *
gst_modplug_fixate (GstPad * pad, const GstCaps * caps)
{
  if (gst_caps_is_simple (caps)) {
    GstCaps *copy;
    GstStructure *structure;

    copy = gst_caps_copy (caps);
    structure = gst_caps_get_structure (copy, 0);
    if (gst_caps_structure_fixate_field_nearest_int (structure, "rate", 44100))
      return copy;
    if (gst_caps_structure_fixate_field_nearest_int (structure, "channels", 2))
      return copy;
    gst_caps_free (copy);
  }
  return NULL;
}

static void
gst_modplug_handle_event (GstModPlug * modplug)
{
  gint64 value;
  guint32 remaining;
  GstEvent *event;

  gst_bytestream_get_status (modplug->bs, &remaining, &event);

  if (!event) {
    g_warning ("modplug: no bytestream event");
    return;
  }

  switch (GST_EVENT_TYPE (event)) {
    case GST_EVENT_EOS:
      gst_event_unref (event);
      break;
    case GST_EVENT_DISCONTINUOUS:
      if (gst_event_discont_get_value (event, GST_FORMAT_BYTES, &value)) {
        if (remaining == value) {
          gst_event_unref (event);
          break;
        }
      }
      gst_bytestream_flush_fast (modplug->bs, remaining);
    default:
      gst_pad_event_default (modplug->sinkpad, event);
      break;
  }
}

static void
gst_modplug_loop (GstElement * element)
{
  GstModPlug *modplug;
  GstEvent *event;

  g_return_if_fail (element != NULL);
  g_return_if_fail (GST_IS_MODPLUG (element));

  modplug = GST_MODPLUG (element);

  if (modplug->state == MODPLUG_STATE_NEED_TUNE) {
/*    GstBuffer *buf;*/

    modplug->seek_at = -1;
    modplug->need_discont = TRUE;
    modplug->eos = FALSE;
/*            
    buf = gst_pad_pull (modplug->sinkpad);
    g_assert (buf != NULL);
      
    if (GST_IS_EVENT (buf)) {
      GstEvent *event = GST_EVENT (buf);

      switch (GST_EVENT_TYPE (buf)) {
        case GST_EVENT_EOS:             
          modplug->state = MODPLUG_STATE_LOAD_TUNE;
          break;
        case GST_EVENT_DISCONTINUOUS:
          break;
        default:
           bail out, we're not going to do anything 
          gst_event_unref (event);
          gst_pad_send_event (modplug->srcpad, gst_event_new (GST_EVENT_EOS));
          gst_element_set_eos (element);
          return;
      }
      gst_event_unref (event);
    }
    else {      
      memcpy (modplug->buffer_in + modplug->song_size, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
      modplug->song_size += GST_BUFFER_SIZE (buf);

      gst_buffer_unref (buf);
    }
*/

    if (modplug->bs) {
      guint64 got;

      modplug->song_size = gst_bytestream_length (modplug->bs);

      got =
          gst_bytestream_peek_bytes (modplug->bs, &modplug->buffer_in,
          modplug->song_size);

      if (got < modplug->song_size) {
        gst_modplug_handle_event (modplug);
        return;
      }
      modplug->state = MODPLUG_STATE_LOAD_TUNE;
    }
  }

  if (modplug->state == MODPLUG_STATE_LOAD_TUNE) {
    modplug->mSoundFile = new CSoundFile;

    if (!GST_PAD_CAPS (modplug->srcpad) &&
        GST_PAD_LINK_FAILED (gst_pad_renegotiate (modplug->srcpad))) {
      GST_ELEMENT_ERROR (modplug, CORE, NEGOTIATION, (NULL), (NULL));
      return;
    }

    modplug->mSoundFile->Create (modplug->buffer_in, modplug->song_size);
    modplug->opened = TRUE;

    gst_bytestream_flush (modplug->bs, modplug->song_size);
    modplug->buffer_in = NULL;

    modplug->audiobuffer = (guchar *) g_malloc (modplug->length);

    //gst_modplug_update_metadata (modplug);
    //gst_modplug_update_info (modplug);

    modplug->state = MODPLUG_STATE_PLAY_TUNE;
  }

  if (modplug->state == MODPLUG_STATE_PLAY_TUNE && !modplug->eos) {
    if (modplug->seek_at != -1) {
      gint seek_to_pos;
      gint64 total;
      gfloat temp;

      total = modplug->mSoundFile->GetSongTime () * GST_SECOND;

      temp = (gfloat) total / modplug->seek_at;
      seek_to_pos = (int) (modplug->mSoundFile->GetMaxPosition () / temp);

      modplug->mSoundFile->SetCurrentPos (seek_to_pos);
      modplug->need_discont = TRUE;
      modplug->seek_at = -1;
    }

    if (modplug->need_discont && GST_PAD_IS_USABLE (modplug->srcpad)) {
      GstEvent *discont;
      gint64 value;
      GstFormat format = GST_FORMAT_TIME;

      if (gst_modplug_src_query (modplug->srcpad, GST_QUERY_POSITION, &format,
              &value)) {
        discont =
            gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, value,
            GST_FORMAT_UNDEFINED);
        modplug->timestamp = value;
      } else {
        modplug->timestamp = GST_CLOCK_TIME_NONE;
        discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_UNDEFINED);
      }
      gst_pad_push (modplug->srcpad, GST_DATA (discont));
      modplug->need_discont = FALSE;
    }

    if (modplug->mSoundFile->Read (modplug->audiobuffer, modplug->length) != 0) {
      GstBuffer *buffer_out;

      buffer_out = gst_buffer_new ();
      GST_BUFFER_DATA (buffer_out) =
          (guchar *) g_memdup (modplug->audiobuffer, modplug->length);
      GST_BUFFER_SIZE (buffer_out) = modplug->length;
      GST_BUFFER_TIMESTAMP (buffer_out) = modplug->timestamp;

      if (GST_CLOCK_TIME_IS_VALID (modplug->timestamp)) {
        GST_BUFFER_DURATION (buffer_out) =
            modplug->length * GST_SECOND / modplug->frequency /
            modplug->channel / (modplug->_16bit ? 2 : 1);
        modplug->timestamp += GST_BUFFER_DURATION (buffer_out);
      }

      if (GST_PAD_IS_USABLE (modplug->srcpad))
        gst_pad_push (modplug->srcpad, GST_DATA (buffer_out));
    } else if (GST_PAD_IS_LINKED (modplug->srcpad)) {
      /* FIXME, hack, pull final EOS from peer */
      gst_bytestream_flush (modplug->bs, 1);

      event = gst_event_new (GST_EVENT_EOS);
      gst_pad_push (modplug->srcpad, GST_DATA (event));
      gst_element_set_eos (element);
      modplug->eos = TRUE;
    }
  }
}


static GstStateChangeReturn
gst_modplug_change_state (GstElement * element, GstStateChange transition)
{
  GstModPlug *modplug;

  modplug = GST_MODPLUG (element);

  switch (transition) {
    case GST_STATE_CHANGE_NULL_TO_READY:
      break;
    case GST_STATE_CHANGE_READY_TO_PAUSED:
      modplug->bs = gst_bytestream_new (modplug->sinkpad);
      modplug->song_size = 0;
      modplug->state = MODPLUG_STATE_NEED_TUNE;
      break;
    case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
      break;
    case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
      break;
    case GST_STATE_CHANGE_PAUSED_TO_READY:
      gst_bytestream_destroy (modplug->bs);
      modplug->bs = NULL;
      if (modplug->opened) {
        modplug->mSoundFile->Destroy ();
        modplug->opened = FALSE;
      }
      if (modplug->audiobuffer)
        g_free (modplug->audiobuffer);
      modplug->buffer_in = NULL;
      modplug->audiobuffer = NULL;
      modplug->state = MODPLUG_STATE_NEED_TUNE;
      break;
    case GST_STATE_CHANGE_READY_TO_NULL:
      break;
    default:
      break;
  }

  if (GST_ELEMENT_CLASS (parent_class)->change_state)
    return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

  return GST_STATE_CHANGE_SUCCESS;
}


static void
gst_modplug_set_property (GObject * object, guint id, const GValue * value,
    GParamSpec * pspec)
{
  GstModPlug *modplug;

  /* it's not null if we got it, but it might not be ours */
  g_return_if_fail (GST_IS_MODPLUG (object));
  modplug = GST_MODPLUG (object);

  switch (id) {
    case ARG_REVERB:
      modplug->reverb = g_value_get_boolean (value);
      break;
    case ARG_REVERB_DEPTH:
      modplug->reverb_depth = g_value_get_int (value);
      break;
    case ARG_REVERB_DELAY:
      modplug->reverb_delay = g_value_get_int (value);
      break;
    case ARG_MEGABASS:
      modplug->megabass = g_value_get_boolean (value);
      break;
    case ARG_MEGABASS_AMOUNT:
      modplug->megabass_amount = g_value_get_int (value);
      break;
    case ARG_MEGABASS_RANGE:
      modplug->megabass_range = g_value_get_int (value);
      break;
    case ARG_NOISE_REDUCTION:
      modplug->noise_reduction = g_value_get_boolean (value);
      break;
    case ARG_SURROUND:
      modplug->surround = g_value_get_boolean (value);
      break;
    case ARG_SURROUND_DEPTH:
      modplug->surround_depth = g_value_get_int (value);
      break;
    case ARG_SURROUND_DELAY:
      modplug->surround_delay = g_value_get_int (value);
      break;
    default:
      break;
  }
}

static void
gst_modplug_get_property (GObject * object, guint id, GValue * value,
    GParamSpec * pspec)
{
  GstModPlug *modplug;

  /* it's not null if we got it, but it might not be ours */
  g_return_if_fail (GST_IS_MODPLUG (object));
  modplug = GST_MODPLUG (object);

  switch (id) {
    case ARG_REVERB:
      g_value_set_boolean (value, modplug->reverb);
      break;
    case ARG_REVERB_DEPTH:
      g_value_set_int (value, modplug->reverb_depth);
      break;
    case ARG_REVERB_DELAY:
      g_value_set_int (value, modplug->reverb_delay);
      break;
    case ARG_MEGABASS:
      g_value_set_boolean (value, modplug->megabass);
      break;
    case ARG_MEGABASS_AMOUNT:
      g_value_set_int (value, modplug->megabass_amount);
      break;
    case ARG_MEGABASS_RANGE:
      g_value_set_int (value, modplug->megabass_range);
      break;
    case ARG_SURROUND:
      g_value_set_boolean (value, modplug->surround);
      break;
    case ARG_SURROUND_DEPTH:
      g_value_set_int (value, modplug->surround_depth);
      break;
    case ARG_SURROUND_DELAY:
      g_value_set_int (value, modplug->surround_delay);
      break;
    case ARG_NOISE_REDUCTION:
      g_value_set_boolean (value, modplug->noise_reduction);
      break;
    default:
      break;
  }
}

static gboolean
plugin_init (GstPlugin * plugin)
{
  /* this filter needs the bytestream package */
  if (!gst_library_load ("gstbytestream"))
    return FALSE;

  return gst_element_register (plugin, "modplug",
      GST_RANK_PRIMARY, GST_TYPE_MODPLUG);
}

GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
    GST_VERSION_MINOR,
    "modplug",
    ".MOD audio decoding",
    plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)