gstreamer/plugins/elements/gstfakesink.c

/* GStreamer
 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
 *                    2000 Wim Taymans <wtay@chello.be>
 *
 * gstfakesink.c: 
 *
 * 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.
 */


#include <gstfakesink.h>


GstElementDetails gst_fakesink_details = {
  "Fake Sink",
  "Sink",
  "LGPL",
  "Black hole for data",
  VERSION,
  "Erik Walthinsen <omega@cse.ogi.edu>",
  "(C) 1999",
};


/* FakeSink signals and args */
enum {
  /* FILL ME */
  SIGNAL_HANDOFF,
  LAST_SIGNAL
};

enum {
  ARG_0,
  ARG_STATE_ERROR,
  ARG_NUM_SINKS,
  ARG_SILENT,
  ARG_DUMP,
  ARG_SYNC,
  ARG_LAST_MESSAGE,
};

GST_PAD_TEMPLATE_FACTORY (fakesink_sink_factory,
  "sink%d",
  GST_PAD_SINK,
  GST_PAD_REQUEST,
  NULL                  /* no caps */
);

#define GST_TYPE_FAKESINK_STATE_ERROR (gst_fakesink_state_error_get_type())
static GType
gst_fakesink_state_error_get_type (void)
{
  static GType fakesink_state_error_type = 0;
  static GEnumValue fakesink_state_error[] = {
    { FAKESINK_STATE_ERROR_NONE,           "0", "No state change errors"},
    { FAKESINK_STATE_ERROR_NULL_READY,     "1", "Fail state change from NULL to READY"},
    { FAKESINK_STATE_ERROR_READY_PAUSED,   "2", "Fail state change from READY to PAUSED"},
    { FAKESINK_STATE_ERROR_PAUSED_PLAYING, "3", "Fail state change from PAUSED to PLAYING"},
    { FAKESINK_STATE_ERROR_PLAYING_PAUSED, "4", "Fail state change from PLAYING to PAUSED"},
    { FAKESINK_STATE_ERROR_PAUSED_READY  , "5", "Fail state change from PAUSED to READY"},
    { FAKESINK_STATE_ERROR_READY_NULL    , "6", "Fail state change from READY to NULL"},
    {0, NULL, NULL},
  };
  if (!fakesink_state_error_type) {
    fakesink_state_error_type = g_enum_register_static ("GstFakeSinkStateError", fakesink_state_error);
  }
  return fakesink_state_error_type;
}

static void	gst_fakesink_class_init		(GstFakeSinkClass *klass);
static void	gst_fakesink_init		(GstFakeSink *fakesink);

static void 	gst_fakesink_set_clock 		(GstElement *element, GstClock *clock);
static GstPad* 	gst_fakesink_request_new_pad 	(GstElement *element, GstPadTemplate *templ, const
                                                 gchar *unused);

static void	gst_fakesink_set_property	(GObject *object, guint prop_id, 
						 const GValue *value, GParamSpec *pspec);
static void	gst_fakesink_get_property	(GObject *object, guint prop_id, 
						 GValue *value, GParamSpec *pspec);

static GstElementStateReturn
		gst_fakesink_change_state 	(GstElement *element);

static void	gst_fakesink_chain		(GstPad *pad, GstBuffer *buf);

static GstElementClass *parent_class = NULL;
static guint gst_fakesink_signals[LAST_SIGNAL] = { 0 };

GType
gst_fakesink_get_type (void) 
{
  static GType fakesink_type = 0;

  if (!fakesink_type) {
    static const GTypeInfo fakesink_info = {
      sizeof(GstFakeSinkClass),      NULL,
      NULL,
      (GClassInitFunc)gst_fakesink_class_init,
      NULL,
      NULL,
      sizeof(GstFakeSink),
      0,
      (GInstanceInitFunc)gst_fakesink_init,
    };
    fakesink_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFakeSink", &fakesink_info, 0);
  }
  return fakesink_type;
}

static void
gst_fakesink_class_init (GstFakeSinkClass *klass) 
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;

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

  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);

  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NUM_SINKS,
    g_param_spec_int ("num_sinks", "Number of sinks", "The number of sinkpads",
                      1, G_MAXINT, 1, G_PARAM_READABLE)); 
  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_STATE_ERROR,
    g_param_spec_enum ("state_error", "State Error", "Generate a state change error",
                       GST_TYPE_FAKESINK_STATE_ERROR, FAKESINK_STATE_ERROR_NONE, G_PARAM_READWRITE));
  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LAST_MESSAGE,
    g_param_spec_string ("last_message", "Last Message", "The message describing current status",
                         NULL, G_PARAM_READABLE));
  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SYNC,
    g_param_spec_boolean ("sync", "Sync", "Sync on the clock",
                          FALSE, G_PARAM_READWRITE)); 
  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SILENT,
    g_param_spec_boolean ("silent", "Silent", "Don't produce last_message events",
                          FALSE, G_PARAM_READWRITE)); 
  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DUMP,
    g_param_spec_boolean ("dump", "Dump", "Dump received bytes to stdout",
                          FALSE, G_PARAM_READWRITE)); 

  gst_fakesink_signals[SIGNAL_HANDOFF] =
    g_signal_new ("handoff", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
                    G_STRUCT_OFFSET (GstFakeSinkClass, handoff), NULL, NULL,
                    g_cclosure_marshal_VOID__POINTER, G_TYPE_NONE, 1,
                    G_TYPE_POINTER);

  gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_fakesink_set_property);
  gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_fakesink_get_property);

  gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR (gst_fakesink_request_new_pad);
  gstelement_class->set_clock       = GST_DEBUG_FUNCPTR (gst_fakesink_set_clock);
  gstelement_class->change_state    = GST_DEBUG_FUNCPTR (gst_fakesink_change_state);
}

static void 
gst_fakesink_init (GstFakeSink *fakesink) 
{
  GstPad *pad;

  pad = gst_pad_new ("sink", GST_PAD_SINK);
  gst_element_add_pad (GST_ELEMENT (fakesink), pad);
  gst_pad_set_chain_function (pad, GST_DEBUG_FUNCPTR (gst_fakesink_chain));

  fakesink->silent = FALSE;
  fakesink->dump = FALSE;
  fakesink->sync = FALSE;
  fakesink->last_message = NULL;
  fakesink->state_error = FAKESINK_STATE_ERROR_NONE;

  GST_FLAG_SET (fakesink, GST_ELEMENT_EVENT_AWARE);
}

static void
gst_fakesink_set_clock (GstElement *element, GstClock *clock)
{ 
  GstFakeSink *sink;

  sink = GST_FAKESINK (element);

  sink->clock = clock;
} 

static GstPad*
gst_fakesink_request_new_pad (GstElement *element, GstPadTemplate *templ, const gchar *unused)
{
  gchar *name;
  GstPad *sinkpad;
  GstFakeSink *fakesink;

  g_return_val_if_fail (GST_IS_FAKESINK (element), NULL);

  if (templ->direction != GST_PAD_SINK) {
    g_warning ("gstfakesink: request new pad that is not a SINK pad\n");
    return NULL;
  }

  fakesink = GST_FAKESINK (element);

  name = g_strdup_printf ("sink%d", GST_ELEMENT (fakesink)->numsinkpads);

  sinkpad = gst_pad_new_from_template (templ, name);
  g_free (name);
  
  gst_element_add_pad (GST_ELEMENT (fakesink), sinkpad);

  return sinkpad;
}

static void
gst_fakesink_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
{
  GstFakeSink *sink;

  /* it's not null if we got it, but it might not be ours */
  sink = GST_FAKESINK (object);

  switch (prop_id) {
    case ARG_SILENT:
      sink->silent = g_value_get_boolean (value);
      break;
    case ARG_STATE_ERROR:
      sink->state_error = g_value_get_enum (value);
      break;
    case ARG_DUMP:
      sink->dump = g_value_get_boolean (value);
      break;
    case ARG_SYNC:
      sink->sync = g_value_get_boolean (value);
      break;
    default:
      break;
  }
}

static void   
gst_fakesink_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
{
  GstFakeSink *sink;
 
  /* it's not null if we got it, but it might not be ours */
  g_return_if_fail (GST_IS_FAKESINK (object));
 
  sink = GST_FAKESINK (object);
  
  switch (prop_id) {
    case ARG_NUM_SINKS:
      g_value_set_int (value, GST_ELEMENT (sink)->numsinkpads);
      break;
    case ARG_STATE_ERROR:
      g_value_set_enum (value, sink->state_error);
      break;
    case ARG_SILENT:
      g_value_set_boolean (value, sink->silent);
      break;
    case ARG_DUMP:
      g_value_set_boolean (value, sink->dump);
      break;
    case ARG_SYNC:
      g_value_set_boolean (value, sink->sync);
      break;
    case ARG_LAST_MESSAGE:
      g_value_set_string (value, sink->last_message);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

static void 
gst_fakesink_chain (GstPad *pad, GstBuffer *buf) 
{
  GstFakeSink *fakesink;

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

  fakesink = GST_FAKESINK (gst_pad_get_parent (pad));

  if (GST_IS_EVENT (buf)) {
    GstEvent *event = GST_EVENT (buf);
    
    if (!fakesink->silent) { 
      g_free (fakesink->last_message);

      fakesink->last_message = g_strdup_printf ("chain   ******* (%s:%s)E (type: %d) %p",
		GST_DEBUG_PAD_NAME (pad), GST_EVENT_TYPE (event), event);
    
      g_object_notify (G_OBJECT (fakesink), "last_message");
    }
	  
    switch (GST_EVENT_TYPE (event)) {
      case GST_EVENT_DISCONTINUOUS:
        if (fakesink->sync && fakesink->clock) { 
          gint64 value = GST_EVENT_DISCONT_OFFSET (event, 0).value;
          gst_clock_handle_discont (fakesink->clock, value);
	}
      default:
	gst_pad_event_default (pad, event);
        break;
    }
    return;
  }

  if (fakesink->sync && fakesink->clock) { 
    GstClockID id = gst_clock_new_single_shot_id (fakesink->clock, GST_BUFFER_TIMESTAMP (buf));

    gst_element_clock_wait (GST_ELEMENT (fakesink), id, NULL);
    gst_clock_id_free (id);
  }

  if (!fakesink->silent) { 
    g_free (fakesink->last_message);

    fakesink->last_message = g_strdup_printf ("chain   ******* (%s:%s)< (%d bytes, timestamp: %"
                                              G_GINT64_FORMAT ", duration: %" 
					      G_GINT64_FORMAT ", offset: %" 
					      G_GINT64_FORMAT ", flags: %d) %p",
		GST_DEBUG_PAD_NAME (pad), GST_BUFFER_SIZE (buf), 
		GST_BUFFER_TIMESTAMP (buf), 
		GST_BUFFER_DURATION (buf), 
		GST_BUFFER_OFFSET (buf), 
		GST_BUFFER_FLAGS (buf), buf);
    
    g_object_notify (G_OBJECT (fakesink), "last_message");
  }

  g_signal_emit (G_OBJECT (fakesink), gst_fakesink_signals[SIGNAL_HANDOFF], 0, buf, pad);

  if (fakesink->dump) {
    gst_util_dump_mem (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
  }

  gst_buffer_unref (buf);
}

static GstElementStateReturn
gst_fakesink_change_state (GstElement *element)
{
  GstFakeSink *fakesink = GST_FAKESINK (element);

  switch (GST_STATE_TRANSITION (element)) {
    case GST_STATE_NULL_TO_READY:
      if (fakesink->state_error == FAKESINK_STATE_ERROR_NULL_READY)
	goto error;
      break;
    case GST_STATE_READY_TO_PAUSED:
      if (fakesink->state_error == FAKESINK_STATE_ERROR_READY_PAUSED)
	goto error;
      break;
    case GST_STATE_PAUSED_TO_PLAYING:
      if (fakesink->state_error == FAKESINK_STATE_ERROR_PAUSED_PLAYING)
	goto error;
      break;
    case GST_STATE_PLAYING_TO_PAUSED:
      if (fakesink->state_error == FAKESINK_STATE_ERROR_PLAYING_PAUSED)
	goto error;
      break;
    case GST_STATE_PAUSED_TO_READY:
      if (fakesink->state_error == FAKESINK_STATE_ERROR_PAUSED_READY)
	goto error;
      break;
    case GST_STATE_READY_TO_NULL:
      if (fakesink->state_error == FAKESINK_STATE_ERROR_READY_NULL)
	goto error;
      break;
  }

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

  return GST_STATE_SUCCESS;

error:
  gst_element_error (element, "failed state change as requested");
  return GST_STATE_FAILURE;
}

gboolean
gst_fakesink_factory_init (GstElementFactory *factory)
{
  gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (fakesink_sink_factory));

  return TRUE;
}