gstreamer/gstplay/gstplay.c

/*
 * Initial main.c file generated by Glade. Edit as required.
 * Glade will not overwrite this file.
 */

#include <config.h>

#include "gstplay.h"
#include "gstplayprivate.h"

static void gst_play_class_init         (GstPlayClass *klass);
static void gst_play_init               (GstPlay *play);

static void gst_play_set_arg		(GtkObject *object,GtkArg *arg,guint id);
static void gst_play_get_arg		(GtkObject *object,GtkArg *arg,guint id);

static void gst_play_realize		(GtkWidget *play);

static void gst_play_frame_displayed	(GstElement *element, GstPlay *play);
static void gst_play_audio_handoff	(GstElement *element, GstPlay *play);

/* signals and args */
enum {
  SIGNAL_STATE_CHANGED,
  SIGNAL_FRAME_DISPLAYED,
  SIGNAL_AUDIO_PLAYED,
  LAST_SIGNAL
};

enum {
  ARG_0,
  ARG_URI,
  ARG_MUTE,
  ARG_STATE,
  ARG_MEDIA_SIZE,
  ARG_MEDIA_OFFSET,
  ARG_MEDIA_TOTAL_TIME,
  ARG_MEDIA_CURRENT_TIME,
};

static GtkObject *parent_class = NULL;
static guint gst_play_signals[LAST_SIGNAL] = { 0 };

GtkType
gst_play_get_type (void)
{
  static GtkType play_type = 0;

  if (!play_type) {
    static const GtkTypeInfo play_info = {
      "GstPlay",
      sizeof(GstPlay),
      sizeof(GstPlayClass),
      (GtkClassInitFunc)gst_play_class_init,
      (GtkObjectInitFunc)gst_play_init,
      NULL,
      NULL,
      (GtkClassInitFunc)NULL,
    };
    play_type = gtk_type_unique (gtk_hbox_get_type (),&play_info);
  }
  return play_type;
}

static void
gst_play_class_init (GstPlayClass *klass)
{
  GtkObjectClass *object_class;
  GtkWidgetClass *widget_class;

  parent_class = gtk_type_class (gtk_hbox_get_type ());

  object_class = (GtkObjectClass*)klass;
  widget_class = (GtkWidgetClass*)klass;

  gst_play_signals[SIGNAL_STATE_CHANGED] =
    gtk_signal_new ("playing_state_changed",GTK_RUN_FIRST,object_class->type,
                    GTK_SIGNAL_OFFSET (GstPlayClass,state_changed),
                    gtk_marshal_NONE__INT,GTK_TYPE_NONE,1,
                    GTK_TYPE_INT);

  gst_play_signals[SIGNAL_FRAME_DISPLAYED] =
    gtk_signal_new ("frame_displayed",GTK_RUN_FIRST,object_class->type,
                    GTK_SIGNAL_OFFSET (GstPlayClass,frame_displayed),
                    gtk_marshal_NONE__NONE,GTK_TYPE_NONE,0);

  gst_play_signals[SIGNAL_AUDIO_PLAYED] =
    gtk_signal_new ("audio_played",GTK_RUN_FIRST,object_class->type,
                    GTK_SIGNAL_OFFSET (GstPlayClass,audio_played),
                    gtk_marshal_NONE__NONE,GTK_TYPE_NONE,0);

  gtk_object_class_add_signals (object_class,gst_play_signals,LAST_SIGNAL);
  gtk_object_add_arg_type ("GstPlay::uri",GTK_TYPE_STRING,
                           GTK_ARG_READABLE, ARG_URI);
  gtk_object_add_arg_type ("GstPlay::mute",GTK_TYPE_BOOL,
                           GTK_ARG_READWRITE, ARG_MUTE);
  gtk_object_add_arg_type ("GstPlay::state",GTK_TYPE_INT,
                           GTK_ARG_READABLE, ARG_STATE);
  gtk_object_add_arg_type ("GstPlay::media_size",GTK_TYPE_ULONG,
                           GTK_ARG_READABLE, ARG_MEDIA_SIZE);
  gtk_object_add_arg_type ("GstPlay::media_offset",GTK_TYPE_ULONG,
                           GTK_ARG_READABLE, ARG_MEDIA_OFFSET);
  gtk_object_add_arg_type ("GstPlay::media_total_time",GTK_TYPE_ULONG,
                           GTK_ARG_READABLE, ARG_MEDIA_TOTAL_TIME);
  gtk_object_add_arg_type ("GstPlay::media_current_time",GTK_TYPE_ULONG,
                           GTK_ARG_READABLE, ARG_MEDIA_CURRENT_TIME);

  object_class->set_arg = gst_play_set_arg;
  object_class->get_arg = gst_play_get_arg;

  widget_class->realize = gst_play_realize;

}

static void
gst_play_init (GstPlay *play)
{
  GstPlayPrivate *priv = g_new0 (GstPlayPrivate, 1);

  play->priv = priv;

  /* create a new bin to hold the elements */
  priv->thread = gst_thread_new ("main_thread");
  g_assert (priv->thread != NULL);
  priv->bin = gst_bin_new ("main_bin");
  g_assert (priv->bin != NULL);

  priv->audio_element = gst_elementfactory_make ("audiosink", "play_audio");
  g_return_if_fail (priv->audio_element != NULL);
  gtk_signal_connect (GTK_OBJECT (priv->audio_element), "handoff",
		  GTK_SIGNAL_FUNC (gst_play_audio_handoff), play);

  priv->video_element = gst_elementfactory_make ("videosink", "show");
  g_return_if_fail (priv->video_element != NULL);
  gtk_object_set (GTK_OBJECT (priv->video_element), "xv_enabled", FALSE, NULL);
  gtk_signal_connect (GTK_OBJECT (priv->video_element), "frame_displayed",
		  GTK_SIGNAL_FUNC (gst_play_frame_displayed), play);

  play->state = GST_PLAY_STOPPED;
  play->flags = 0;

  priv->src = NULL;
  priv->muted = FALSE;
  priv->can_seek = TRUE;
  priv->uri = NULL;
  priv->offset_element = NULL;
  priv->bit_rate_element = NULL;
  priv->media_time_element = NULL;
}

GstPlay *
gst_play_new ()
{
  return GST_PLAY (gtk_type_new (GST_TYPE_PLAY));
}

static void
gst_play_eos (GstElement *element,
	      GstPlay *play)
{
  g_print("gstplay: eos reached\n");
  gst_play_stop(play);
}

static void
gst_play_frame_displayed (GstElement *element,
		          GstPlay *play)
{
  GstPlayPrivate *priv;

  priv = (GstPlayPrivate *)play->priv;

  gdk_threads_enter ();
  gtk_widget_show (GTK_WIDGET (priv->video_widget));
  gdk_threads_leave ();

  gtk_signal_emit (GTK_OBJECT (play), gst_play_signals[SIGNAL_FRAME_DISPLAYED],
		  NULL);
}

static void
gst_play_audio_handoff (GstElement *element,
		        GstPlay *play)
{
  gtk_signal_emit (GTK_OBJECT (play), gst_play_signals[SIGNAL_AUDIO_PLAYED],
		  NULL);
}

static void
gst_play_object_introspect (GstObject *object,
		            const gchar *property,
			    GstElement **target)
{
  gchar *info;
  GtkArgInfo *arg;
  GstElement *element;

  if (!GST_IS_ELEMENT (object))
    return;

  element = GST_ELEMENT (object);

  info = gtk_object_arg_get_info (GTK_OBJECT_TYPE (element), property, &arg);

  if (info) {
    g_free(info);
  }
  else {
    *target = element;
    g_print("gstplay: using element \"%s\" for %s property\n",
		    gst_element_get_name(element), property);
  }
}

/* Dumb introspection of the interface...
 * this will change with glib 1.4
 * */
static void
gst_play_object_added (GstAutoplug* autoplug,
		       GstObject *object,
		       GstPlay *play)
{
  GstPlayPrivate *priv;

  g_return_if_fail (play != NULL);

  priv = (GstPlayPrivate *)play->priv;

  if (GST_FLAG_IS_SET (object, GST_ELEMENT_NO_SEEK)) {
    priv->can_seek = FALSE;
  }

  if (GST_IS_BIN (object)) {
    //gtk_signal_connect (GTK_OBJECT (object), "object_added", gst_play_object_added, play);
  }
  else {
    // first come first serve here...
    if (!priv->offset_element)
      gst_play_object_introspect (object, "offset", &priv->offset_element);
    if (!priv->bit_rate_element)
      gst_play_object_introspect (object, "bit_rate", &priv->bit_rate_element);
    if (!priv->media_time_element)
      gst_play_object_introspect (object, "media_time", &priv->media_time_element);
    if (!priv->current_time_element)
      gst_play_object_introspect (object, "current_time", &priv->current_time_element);
  }
}

static void
gst_play_have_type (GstElement *sink, GstElement *sink2, gpointer data)
{
  GST_DEBUG (0,"GstPipeline: play have type %p\n", (gboolean *)data);

  *(gboolean *)data = TRUE;
}

static GstCaps*
gst_play_typefind (GstBin *bin, GstElement *element)
{
  gboolean found = FALSE;
  GstElement *typefind;
  GstCaps *caps = NULL;

  GST_DEBUG (0,"GstPipeline: typefind for element \"%s\" %p\n",
                  GST_ELEMENT_NAME(element), &found);

  typefind = gst_elementfactory_make ("typefind", "typefind");
  g_return_val_if_fail (typefind != NULL, FALSE);

  gtk_signal_connect (GTK_OBJECT (typefind), "have_type",
                      GTK_SIGNAL_FUNC (gst_play_have_type), &found);

  gst_pad_connect (gst_element_get_pad (element, "src"),
                   gst_element_get_pad (typefind, "sink"));

  gst_bin_add (bin, typefind);

  gst_element_set_state (GST_ELEMENT (bin), GST_STATE_PLAYING);

  // push a buffer... the have_type signal handler will set the found flag
  gst_bin_iterate (bin);

  gst_element_set_state (GST_ELEMENT (bin), GST_STATE_NULL);

  if (found) {
    caps = gst_util_get_pointer_arg (GTK_OBJECT (typefind), "caps");

    gst_pad_set_caps_list (gst_element_get_pad (element, "src"), g_list_prepend (NULL, caps));
  }

  gst_pad_disconnect (gst_element_get_pad (element, "src"),
  gst_element_get_pad (typefind, "sink"));
  gst_bin_remove (bin, typefind);
  gst_object_unref (GST_OBJECT (typefind));

  return caps;
}

static gboolean
connect_pads (GstElement *new_element, GstElement *target, gboolean add)
{
  GList *pads = gst_element_get_pad_list (new_element);
  GstPad *targetpad = gst_element_get_pad (target, "sink");

  while (pads) {
    GstPad *pad = GST_PAD (pads->data);

    if (gst_pad_check_compatibility (pad, targetpad)) {
      if (add) {
        gst_bin_add (GST_BIN (gst_element_get_parent (
	             GST_ELEMENT (gst_pad_get_real_parent (pad)))),
	  	     target);
      }
      gst_pad_connect (pad, targetpad);
      return TRUE;
    }
    pads = g_list_next (pads);
  }
  return FALSE;
}

GstPlayReturn
gst_play_set_uri (GstPlay *play,
		  const guchar *uri)
{
  GstPlayPrivate *priv;
  GstCaps *src_caps;
  GstElement *new_element;
  GstAutoplug *autoplug;

  g_return_val_if_fail (play != NULL, GST_PLAY_ERROR);
  g_return_val_if_fail (GST_IS_PLAY (play), GST_PLAY_ERROR);
  g_return_val_if_fail (uri != NULL, GST_PLAY_ERROR);

  priv = (GstPlayPrivate *)play->priv;

  if (priv->uri)
    g_free (priv->uri);

  priv->uri = g_strdup (uri);

  priv->src = gst_elementfactory_make ("disksrc", "disk_src");
  //priv->src = gst_elementfactory_make ("dvdsrc", "disk_src");
  priv->offset_element = priv->src;

  g_return_val_if_fail (priv->src != NULL, -1);
  gtk_object_set (GTK_OBJECT (priv->src), "location", uri, NULL);

  gst_bin_add (GST_BIN (priv->bin), priv->src);

  src_caps = gst_play_typefind (GST_BIN (priv->bin), priv->src);

  if (!src_caps) {
    return GST_PLAY_UNKNOWN_MEDIA;
  }

  autoplug = gst_autoplugfactory_make ("staticrender");
  g_assert (autoplug != NULL);

  gtk_signal_connect (GTK_OBJECT (autoplug), "new_object", gst_play_object_added, play);

  new_element = gst_autoplug_to_renderers (autoplug,
	   gst_pad_get_caps_list (gst_element_get_pad (priv->src, "src")),
	   priv->video_element,
	   priv->audio_element,
	   NULL);

  if (!new_element) {
    return GST_PLAY_CANNOT_PLAY;
  }

  gst_bin_remove (GST_BIN (priv->bin), priv->src);
  gst_bin_add (GST_BIN (priv->thread), priv->src);

  gst_bin_add (GST_BIN (priv->bin), new_element);

  gst_element_connect (priv->src, "src", new_element, "sink");

  gst_bin_add (GST_BIN (priv->thread), priv->bin);
  gtk_signal_connect (GTK_OBJECT (priv->thread), "eos", GTK_SIGNAL_FUNC (gst_play_eos), play);

  return GST_PLAY_OK;
}

static void
gst_play_realize (GtkWidget *widget)
{
  GstPlay *play;
  GstPlayPrivate *priv;

  g_return_if_fail (GST_IS_PLAY (widget));
  g_print ("gst_play: realize\n");

  play = GST_PLAY (widget);
  priv = (GstPlayPrivate *)play->priv;

  priv->video_widget = gst_util_get_widget_arg (GTK_OBJECT (priv->video_element), "widget");

  if (priv->video_widget) {
    gtk_container_add (GTK_CONTAINER (widget), priv->video_widget);
  }
  else {
    g_print ("oops, no video widget found\n");
  }

  if (GTK_WIDGET_CLASS (parent_class)->realize) {
    GTK_WIDGET_CLASS (parent_class)->realize (widget);
  }
}

void
gst_play_play (GstPlay *play)
{
  GstPlayPrivate *priv;

  g_return_if_fail (play != NULL);
  g_return_if_fail (GST_IS_PLAY (play));

  priv = (GstPlayPrivate *)play->priv;

  if (play->state == GST_PLAY_PLAYING) return;

  if (play->state == GST_PLAY_STOPPED)
    gst_element_set_state (GST_ELEMENT (priv->thread),GST_STATE_READY);
  gst_element_set_state (GST_ELEMENT (priv->thread),GST_STATE_PLAYING);

  play->state = GST_PLAY_PLAYING;

  gtk_signal_emit (GTK_OBJECT (play), gst_play_signals[SIGNAL_STATE_CHANGED],
		  play->state);
}

void
gst_play_pause (GstPlay *play)
{
  GstPlayPrivate *priv;

  g_return_if_fail (play != NULL);
  g_return_if_fail (GST_IS_PLAY (play));

  priv = (GstPlayPrivate *)play->priv;

  if (play->state != GST_PLAY_PLAYING) return;

  gst_element_set_state (GST_ELEMENT (priv->thread),GST_STATE_PAUSED);

  play->state = GST_PLAY_PAUSED;

  gtk_signal_emit (GTK_OBJECT (play), gst_play_signals[SIGNAL_STATE_CHANGED],
		  play->state);
}

void
gst_play_stop (GstPlay *play)
{
  GstPlayPrivate *priv;

  g_return_if_fail (play != NULL);
  g_return_if_fail (GST_IS_PLAY (play));

  if (play->state == GST_PLAY_STOPPED) return;

  priv = (GstPlayPrivate *)play->priv;

  gst_element_set_state (GST_ELEMENT (priv->thread),GST_STATE_NULL);
  gtk_object_set (GTK_OBJECT (priv->src),"offset",0,NULL);

  play->state = GST_PLAY_STOPPED;

  gtk_signal_emit (GTK_OBJECT (play), gst_play_signals[SIGNAL_STATE_CHANGED],
		  play->state);
}

gulong
gst_play_get_media_size (GstPlay *play)
{
  GstPlayPrivate *priv;

  g_return_val_if_fail (play != NULL, 0);
  g_return_val_if_fail (GST_IS_PLAY (play), 0);

  priv = (GstPlayPrivate *)play->priv;

  return gst_util_get_long_arg (GTK_OBJECT (priv->src), "size");
}

gulong
gst_play_get_media_offset (GstPlay *play)
{
  GstPlayPrivate *priv;

  g_return_val_if_fail (play != NULL, 0);
  g_return_val_if_fail (GST_IS_PLAY (play), 0);

  priv = (GstPlayPrivate *)play->priv;

  if (priv->offset_element)
    return gst_util_get_long_arg (GTK_OBJECT (priv->offset_element), "offset");
  else
    return 0;
}

gulong
gst_play_get_media_total_time (GstPlay *play)
{
  gulong total_time, bit_rate;
  GstPlayPrivate *priv;

  g_return_val_if_fail (play != NULL, 0);
  g_return_val_if_fail (GST_IS_PLAY (play), 0);

  priv = (GstPlayPrivate *)play->priv;

  if (priv->media_time_element) {
    return gst_util_get_long_arg (GTK_OBJECT (priv->media_time_element), "media_time");
  }

  if (priv->bit_rate_element == NULL) return 0;

  bit_rate = gst_util_get_long_arg (GTK_OBJECT (priv->bit_rate_element), "bit_rate");

  if (bit_rate)
    total_time = (gst_play_get_media_size (play) * 8) / bit_rate;
  else
    total_time = 0;

  return total_time;
}

gulong
gst_play_get_media_current_time (GstPlay *play)
{
  gulong current_time, bit_rate;
  GstPlayPrivate *priv;

  g_return_val_if_fail (play != NULL, 0);
  g_return_val_if_fail (GST_IS_PLAY (play), 0);

  priv = (GstPlayPrivate *)play->priv;

  if (priv->current_time_element) {
    return gst_util_get_long_arg (GTK_OBJECT (priv->current_time_element), "current_time");
  }

  if (priv->bit_rate_element == NULL) return 0;

  bit_rate = gst_util_get_long_arg (GTK_OBJECT (priv->bit_rate_element), "bit_rate");

  if (bit_rate)
    current_time = (gst_play_get_media_offset (play) * 8) / bit_rate;
  else
    current_time = 0;

  return current_time;
}

gboolean
gst_play_media_can_seek (GstPlay *play)
{
  GstPlayPrivate *priv;

  g_return_val_if_fail (play != NULL, FALSE);
  g_return_val_if_fail (GST_IS_PLAY (play), FALSE);

  priv = (GstPlayPrivate *)play->priv;

  return priv->can_seek;
}

void
gst_play_media_seek (GstPlay *play,
		     gulong offset)
{
  GstPlayPrivate *priv;

  g_return_if_fail (play != NULL);
  g_return_if_fail (GST_IS_PLAY (play));

  priv = (GstPlayPrivate *)play->priv;

  gtk_object_set (GTK_OBJECT (priv->src), "offset", offset, NULL);
}


static void
gst_play_set_arg (GtkObject *object,
		  GtkArg *arg,
		  guint id)
{
  GstPlay *play;

  g_return_if_fail (object != NULL);
  g_return_if_fail (arg != NULL);

  play = GST_PLAY (object);

  switch (id) {
    case ARG_MUTE:
      break;
    default:
      g_warning ("GstPlay: unknown arg!");
      break;
  }
}

static void
gst_play_get_arg (GtkObject *object,
		  GtkArg *arg,
		  guint id)
{
  GstPlay *play;
  GstPlayPrivate *priv;

  g_return_if_fail (object != NULL);
  g_return_if_fail (arg != NULL);

  play = GST_PLAY (object);
  priv = (GstPlayPrivate *)play->priv;

  switch (id) {
    case ARG_URI:
      GTK_VALUE_STRING (*arg) = priv->uri;
      break;
    case ARG_MUTE:
      GTK_VALUE_BOOL (*arg) = priv->muted;
      break;
    case ARG_STATE:
      GTK_VALUE_INT (*arg) = play->state;
      break;
    case ARG_MEDIA_SIZE:
      GTK_VALUE_LONG (*arg) = gst_play_get_media_size(play);
      break;
    case ARG_MEDIA_OFFSET:
      GTK_VALUE_LONG (*arg) = gst_play_get_media_offset(play);
      break;
    case ARG_MEDIA_TOTAL_TIME:
      break;
    case ARG_MEDIA_CURRENT_TIME:
      break;
    default:
      arg->type = GTK_TYPE_INVALID;
      break;
  }
}