gst/debugutils/gstchopmydata.c - imx-gst-plugins-bad - Git at Google

 /* GStreamer
  * Copyright (C) 2010 David Schleef <ds@schleef.org>
  *
  * 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., 51 Franklin St, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 /**
  * SECTION:element-gstchopmydata
  * @title: gstchopmydata
  *
  * The chopmydata element takes an incoming stream and chops it up
  * into randomly sized buffers.  Size of outgoing buffers are determined
  * by the max-size, min-size, and step-size properties.
  *
  * ## Example launch line
  * |[
  * gst-launch-1.0 -v audiotestsrc num-buffers=10 ! chopmydata min-size=100
  * max-size=200 step-size=2 ! fakesink -v
  * ]|
  *
  * This pipeline will create 10 buffers that are by default 2048 bytes
  * each (1024 samples each), and chop them up into buffers that range
  * in size from 100 bytes to 200 bytes, with the restriction that sizes
  * are a multiple of 2.  This restriction is important, because the
  * default sample size for audiotestsrc is 2 bytes (one channel, 16-bit
  * audio).
  *
  */

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

 #include <gst/gst.h>
 #include <gst/gst.h>
 #include "gstchopmydata.h"

 /* prototypes */


 static void gst_chop_my_data_set_property (GObject * object,
     guint property_id, const GValue * value, GParamSpec * pspec);
 static void gst_chop_my_data_get_property (GObject * object,
     guint property_id, GValue * value, GParamSpec * pspec);

 static GstStateChangeReturn
 gst_chop_my_data_change_state (GstElement * element, GstStateChange transition);

 static GstFlowReturn gst_chop_my_data_chain (GstPad * pad, GstObject * parent,
     GstBuffer * buffer);
 static gboolean gst_chop_my_data_sink_event (GstPad * pad, GstObject * parent,
     GstEvent * event);
 static gboolean gst_chop_my_data_src_event (GstPad * pad, GstObject * parent,
     GstEvent * event);

 #define DEFAULT_MAX_SIZE 4096
 #define DEFAULT_MIN_SIZE 1
 #define DEFAULT_STEP_SIZE 1

 enum
 {
   PROP_0,
   PROP_MAX_SIZE,
   PROP_MIN_SIZE,
   PROP_STEP_SIZE
 };

 /* pad templates */

 static GstStaticPadTemplate gst_chop_my_data_sink_template =
 GST_STATIC_PAD_TEMPLATE ("sink",
     GST_PAD_SINK,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS_ANY);

 static GstStaticPadTemplate gst_chop_my_data_src_template =
 GST_STATIC_PAD_TEMPLATE ("src",
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS_ANY);

 /* class initialization */

 #define gst_chop_my_data_parent_class parent_class
 G_DEFINE_TYPE (GstChopMyData, gst_chop_my_data, GST_TYPE_ELEMENT);

 static void
 gst_chop_my_data_class_init (GstChopMyDataClass * klass)
 {
   GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
   GstElementClass *element_class = GST_ELEMENT_CLASS (klass);

   gobject_class->set_property = gst_chop_my_data_set_property;
   gobject_class->get_property = gst_chop_my_data_get_property;
   element_class->change_state =
       GST_DEBUG_FUNCPTR (gst_chop_my_data_change_state);

   g_object_class_install_property (gobject_class, PROP_MAX_SIZE,
       g_param_spec_int ("max-size", "max-size",
           "Maximum size of outgoing buffers", 1, G_MAXINT,
           DEFAULT_MAX_SIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
   g_object_class_install_property (gobject_class, PROP_MIN_SIZE,
       g_param_spec_int ("min-size", "max-size",
           "Minimum size of outgoing buffers", 1, G_MAXINT,
           DEFAULT_MIN_SIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
   g_object_class_install_property (gobject_class, PROP_STEP_SIZE,
       g_param_spec_int ("step-size", "step-size",
           "Step increment for random buffer sizes", 1, G_MAXINT,
           DEFAULT_MAX_SIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

   gst_element_class_add_static_pad_template (element_class,
       &gst_chop_my_data_src_template);
   gst_element_class_add_static_pad_template (element_class,
       &gst_chop_my_data_sink_template);

   gst_element_class_set_static_metadata (element_class, "FIXME",
       "Generic", "FIXME", "David Schleef <ds@schleef.org>");
 }

 static void
 gst_chop_my_data_init (GstChopMyData * chopmydata)
 {

   chopmydata->sinkpad =
       gst_pad_new_from_static_template (&gst_chop_my_data_sink_template,
       "sink");
   gst_pad_set_event_function (chopmydata->sinkpad,
       GST_DEBUG_FUNCPTR (gst_chop_my_data_sink_event));
   gst_pad_set_chain_function (chopmydata->sinkpad,
       GST_DEBUG_FUNCPTR (gst_chop_my_data_chain));
   GST_PAD_SET_PROXY_CAPS (chopmydata->sinkpad);
   gst_element_add_pad (GST_ELEMENT (chopmydata), chopmydata->sinkpad);

   chopmydata->srcpad =
       gst_pad_new_from_static_template (&gst_chop_my_data_src_template, "src");
   gst_pad_set_event_function (chopmydata->srcpad,
       GST_DEBUG_FUNCPTR (gst_chop_my_data_src_event));
   GST_PAD_SET_PROXY_CAPS (chopmydata->srcpad);
   gst_element_add_pad (GST_ELEMENT (chopmydata), chopmydata->srcpad);

   chopmydata->step_size = DEFAULT_STEP_SIZE;
   chopmydata->min_size = DEFAULT_MIN_SIZE;
   chopmydata->max_size = DEFAULT_MAX_SIZE;
 }

 void
 gst_chop_my_data_set_property (GObject * object, guint property_id,
     const GValue * value, GParamSpec * pspec)
 {
   GstChopMyData *chopmydata;

   g_return_if_fail (GST_IS_CHOP_MY_DATA (object));
   chopmydata = GST_CHOP_MY_DATA (object);

   switch (property_id) {
     case PROP_MAX_SIZE:
       chopmydata->max_size = g_value_get_int (value);
       break;
     case PROP_MIN_SIZE:
       chopmydata->min_size = g_value_get_int (value);
       break;
     case PROP_STEP_SIZE:
       chopmydata->step_size = g_value_get_int (value);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
       break;
   }
 }

 void
 gst_chop_my_data_get_property (GObject * object, guint property_id,
     GValue * value, GParamSpec * pspec)
 {
   GstChopMyData *chopmydata;

   g_return_if_fail (GST_IS_CHOP_MY_DATA (object));
   chopmydata = GST_CHOP_MY_DATA (object);

   switch (property_id) {
     case PROP_MAX_SIZE:
       g_value_set_int (value, chopmydata->max_size);
       break;
     case PROP_MIN_SIZE:
       g_value_set_int (value, chopmydata->min_size);
       break;
     case PROP_STEP_SIZE:
       g_value_set_int (value, chopmydata->step_size);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
       break;
   }
 }

 static GstStateChangeReturn
 gst_chop_my_data_change_state (GstElement * element, GstStateChange transition)
 {
   GstChopMyData *chopmydata;
   GstStateChangeReturn ret;

   chopmydata = GST_CHOP_MY_DATA (element);

   switch (transition) {
     case GST_STATE_CHANGE_NULL_TO_READY:
       break;
     case GST_STATE_CHANGE_READY_TO_PAUSED:
       GST_OBJECT_LOCK (chopmydata);
       chopmydata->adapter = gst_adapter_new ();
       chopmydata->rand = g_rand_new ();
       chopmydata->next_size = 0;
       GST_OBJECT_UNLOCK (chopmydata);
       break;
     case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
       break;
     default:
       break;
   }

   ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

   switch (transition) {
     case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
       break;
     case GST_STATE_CHANGE_PAUSED_TO_READY:
       GST_OBJECT_LOCK (chopmydata);
       g_object_unref (chopmydata->adapter);
       chopmydata->adapter = NULL;
       g_rand_free (chopmydata->rand);
       GST_OBJECT_UNLOCK (chopmydata);
       break;
     case GST_STATE_CHANGE_READY_TO_NULL:
       break;
     default:
       break;
   }

   return ret;
 }

 static void
 get_next_size (GstChopMyData * chopmydata)
 {
   int begin;
   int end;

   begin = (chopmydata->min_size + chopmydata->step_size - 1) /
       chopmydata->step_size;
   end = (chopmydata->max_size + chopmydata->step_size) / chopmydata->step_size;

   if (begin >= end) {
     chopmydata->next_size = begin * chopmydata->step_size;
     return;
   }

   chopmydata->next_size =
       g_rand_int_range (chopmydata->rand, begin, end) * chopmydata->step_size;
 }

 static GstFlowReturn
 gst_chop_my_data_process (GstChopMyData * chopmydata, gboolean flush)
 {
   GstFlowReturn ret = GST_FLOW_OK;
   GstBuffer *buffer;

   if (chopmydata->next_size == 0) {
     get_next_size (chopmydata);
   }

   while (gst_adapter_available (chopmydata->adapter) >= chopmydata->next_size) {
     buffer =
         gst_adapter_take_buffer (chopmydata->adapter, chopmydata->next_size);

     GST_BUFFER_PTS (buffer) = gst_adapter_prev_pts (chopmydata->adapter, NULL);
     GST_BUFFER_DTS (buffer) = gst_adapter_prev_dts (chopmydata->adapter, NULL);

     chopmydata->next_size = 0;

     ret = gst_pad_push (chopmydata->srcpad, buffer);
     if (ret != GST_FLOW_OK) {
       return ret;
     }

     get_next_size (chopmydata);
   }

   if (flush) {
     guint min_size = chopmydata->min_size;

     while (gst_adapter_available (chopmydata->adapter) >= min_size) {
       buffer = gst_adapter_take_buffer (chopmydata->adapter, min_size);
       ret = gst_pad_push (chopmydata->srcpad, buffer);
       if (ret != GST_FLOW_OK)
         break;
     }
     gst_adapter_clear (chopmydata->adapter);
   }

   return ret;
 }

 static GstFlowReturn
 gst_chop_my_data_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
 {
   GstChopMyData *chopmydata;
   GstFlowReturn ret;

   chopmydata = GST_CHOP_MY_DATA (parent);

   GST_DEBUG_OBJECT (chopmydata, "chain");

   gst_adapter_push (chopmydata->adapter, buffer);
   ret = gst_chop_my_data_process (chopmydata, FALSE);

   return ret;
 }

 static gboolean
 gst_chop_my_data_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
 {
   gboolean res;
   GstChopMyData *chopmydata;

   chopmydata = GST_CHOP_MY_DATA (parent);

   GST_DEBUG_OBJECT (chopmydata, "event");

   switch (GST_EVENT_TYPE (event)) {
     case GST_EVENT_FLUSH_START:
       res = gst_pad_push_event (chopmydata->srcpad, event);
       break;
     case GST_EVENT_FLUSH_STOP:
       gst_adapter_clear (chopmydata->adapter);
       res = gst_pad_push_event (chopmydata->srcpad, event);
       break;
     case GST_EVENT_SEGMENT:
       res = gst_pad_push_event (chopmydata->srcpad, event);
       break;
     case GST_EVENT_EOS:
       gst_chop_my_data_process (chopmydata, TRUE);
       res = gst_pad_push_event (chopmydata->srcpad, event);
       break;
     default:
       res = gst_pad_push_event (chopmydata->srcpad, event);
       break;
   }

   return res;
 }

 static gboolean
 gst_chop_my_data_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
 {
   gboolean res;
   GstChopMyData *chopmydata;

   chopmydata = GST_CHOP_MY_DATA (parent);

   GST_DEBUG_OBJECT (chopmydata, "event");

   switch (GST_EVENT_TYPE (event)) {
     case GST_EVENT_SEEK:
       res = gst_pad_push_event (chopmydata->sinkpad, event);
       break;
     default:
       res = gst_pad_push_event (chopmydata->sinkpad, event);
       break;
   }

   return res;
 }
	/* GStreamer
	* Copyright (C) 2010 David Schleef <ds@schleef.org>
	*
	* 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., 51 Franklin St, Fifth Floor,
	* Boston, MA 02110-1301, USA.
	*/
	/**
	* SECTION:element-gstchopmydata
	* @title: gstchopmydata
	*
	* The chopmydata element takes an incoming stream and chops it up
	* into randomly sized buffers. Size of outgoing buffers are determined
	* by the max-size, min-size, and step-size properties.
	*
	* ## Example launch line
	* \|[
	* gst-launch-1.0 -v audiotestsrc num-buffers=10 ! chopmydata min-size=100
	* max-size=200 step-size=2 ! fakesink -v
	* ]\|
	*
	* This pipeline will create 10 buffers that are by default 2048 bytes
	* each (1024 samples each), and chop them up into buffers that range
	* in size from 100 bytes to 200 bytes, with the restriction that sizes
	* are a multiple of 2. This restriction is important, because the
	* default sample size for audiotestsrc is 2 bytes (one channel, 16-bit
	* audio).
	*
	*/

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

	#include <gst/gst.h>
	#include <gst/gst.h>
	#include "gstchopmydata.h"

	/* prototypes */


	static void gst_chop_my_data_set_property (GObject * object,
	guint property_id, const GValue * value, GParamSpec * pspec);
	static void gst_chop_my_data_get_property (GObject * object,
	guint property_id, GValue * value, GParamSpec * pspec);

	static GstStateChangeReturn
	gst_chop_my_data_change_state (GstElement * element, GstStateChange transition);

	static GstFlowReturn gst_chop_my_data_chain (GstPad * pad, GstObject * parent,
	GstBuffer * buffer);
	static gboolean gst_chop_my_data_sink_event (GstPad * pad, GstObject * parent,
	GstEvent * event);
	static gboolean gst_chop_my_data_src_event (GstPad * pad, GstObject * parent,
	GstEvent * event);

	#define DEFAULT_MAX_SIZE 4096
	#define DEFAULT_MIN_SIZE 1
	#define DEFAULT_STEP_SIZE 1

	enum
	{
	PROP_0,
	PROP_MAX_SIZE,
	PROP_MIN_SIZE,
	PROP_STEP_SIZE
	};

	/* pad templates */

	static GstStaticPadTemplate gst_chop_my_data_sink_template =
	GST_STATIC_PAD_TEMPLATE ("sink",
	GST_PAD_SINK,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS_ANY);

	static GstStaticPadTemplate gst_chop_my_data_src_template =
	GST_STATIC_PAD_TEMPLATE ("src",
	GST_PAD_SRC,
	GST_PAD_ALWAYS,
	GST_STATIC_CAPS_ANY);

	/* class initialization */

	#define gst_chop_my_data_parent_class parent_class
	G_DEFINE_TYPE (GstChopMyData, gst_chop_my_data, GST_TYPE_ELEMENT);

	static void
	gst_chop_my_data_class_init (GstChopMyDataClass * klass)
	{
	GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
	GstElementClass *element_class = GST_ELEMENT_CLASS (klass);

	gobject_class->set_property = gst_chop_my_data_set_property;
	gobject_class->get_property = gst_chop_my_data_get_property;
	element_class->change_state =
	GST_DEBUG_FUNCPTR (gst_chop_my_data_change_state);

	g_object_class_install_property (gobject_class, PROP_MAX_SIZE,
	g_param_spec_int ("max-size", "max-size",
	"Maximum size of outgoing buffers", 1, G_MAXINT,
	DEFAULT_MAX_SIZE, G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));
	g_object_class_install_property (gobject_class, PROP_MIN_SIZE,
	g_param_spec_int ("min-size", "max-size",
	"Minimum size of outgoing buffers", 1, G_MAXINT,
	DEFAULT_MIN_SIZE, G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));
	g_object_class_install_property (gobject_class, PROP_STEP_SIZE,
	g_param_spec_int ("step-size", "step-size",
	"Step increment for random buffer sizes", 1, G_MAXINT,
	DEFAULT_MAX_SIZE, G_PARAM_READWRITE \| G_PARAM_STATIC_STRINGS));

	gst_element_class_add_static_pad_template (element_class,
	&gst_chop_my_data_src_template);
	gst_element_class_add_static_pad_template (element_class,
	&gst_chop_my_data_sink_template);

	gst_element_class_set_static_metadata (element_class, "FIXME",
	"Generic", "FIXME", "David Schleef <ds@schleef.org>");
	}

	static void
	gst_chop_my_data_init (GstChopMyData * chopmydata)
	{

	chopmydata->sinkpad =
	gst_pad_new_from_static_template (&gst_chop_my_data_sink_template,
	"sink");
	gst_pad_set_event_function (chopmydata->sinkpad,
	GST_DEBUG_FUNCPTR (gst_chop_my_data_sink_event));
	gst_pad_set_chain_function (chopmydata->sinkpad,
	GST_DEBUG_FUNCPTR (gst_chop_my_data_chain));
	GST_PAD_SET_PROXY_CAPS (chopmydata->sinkpad);
	gst_element_add_pad (GST_ELEMENT (chopmydata), chopmydata->sinkpad);

	chopmydata->srcpad =
	gst_pad_new_from_static_template (&gst_chop_my_data_src_template, "src");
	gst_pad_set_event_function (chopmydata->srcpad,
	GST_DEBUG_FUNCPTR (gst_chop_my_data_src_event));
	GST_PAD_SET_PROXY_CAPS (chopmydata->srcpad);
	gst_element_add_pad (GST_ELEMENT (chopmydata), chopmydata->srcpad);

	chopmydata->step_size = DEFAULT_STEP_SIZE;
	chopmydata->min_size = DEFAULT_MIN_SIZE;
	chopmydata->max_size = DEFAULT_MAX_SIZE;
	}

	void
	gst_chop_my_data_set_property (GObject * object, guint property_id,
	const GValue * value, GParamSpec * pspec)
	{
	GstChopMyData *chopmydata;

	g_return_if_fail (GST_IS_CHOP_MY_DATA (object));
	chopmydata = GST_CHOP_MY_DATA (object);

	switch (property_id) {
	case PROP_MAX_SIZE:
	chopmydata->max_size = g_value_get_int (value);
	break;
	case PROP_MIN_SIZE:
	chopmydata->min_size = g_value_get_int (value);
	break;
	case PROP_STEP_SIZE:
	chopmydata->step_size = g_value_get_int (value);
	break;
	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
	break;
	}
	}

	void
	gst_chop_my_data_get_property (GObject * object, guint property_id,
	GValue * value, GParamSpec * pspec)
	{
	GstChopMyData *chopmydata;

	g_return_if_fail (GST_IS_CHOP_MY_DATA (object));
	chopmydata = GST_CHOP_MY_DATA (object);

	switch (property_id) {
	case PROP_MAX_SIZE:
	g_value_set_int (value, chopmydata->max_size);
	break;
	case PROP_MIN_SIZE:
	g_value_set_int (value, chopmydata->min_size);
	break;
	case PROP_STEP_SIZE:
	g_value_set_int (value, chopmydata->step_size);
	break;
	default:
	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
	break;
	}
	}

	static GstStateChangeReturn
	gst_chop_my_data_change_state (GstElement * element, GstStateChange transition)
	{
	GstChopMyData *chopmydata;
	GstStateChangeReturn ret;

	chopmydata = GST_CHOP_MY_DATA (element);

	switch (transition) {
	case GST_STATE_CHANGE_NULL_TO_READY:
	break;
	case GST_STATE_CHANGE_READY_TO_PAUSED:
	GST_OBJECT_LOCK (chopmydata);
	chopmydata->adapter = gst_adapter_new ();
	chopmydata->rand = g_rand_new ();
	chopmydata->next_size = 0;
	GST_OBJECT_UNLOCK (chopmydata);
	break;
	case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
	break;
	default:
	break;
	}

	ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

	switch (transition) {
	case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
	break;
	case GST_STATE_CHANGE_PAUSED_TO_READY:
	GST_OBJECT_LOCK (chopmydata);
	g_object_unref (chopmydata->adapter);
	chopmydata->adapter = NULL;
	g_rand_free (chopmydata->rand);
	GST_OBJECT_UNLOCK (chopmydata);
	break;
	case GST_STATE_CHANGE_READY_TO_NULL:
	break;
	default:
	break;
	}

	return ret;
	}

	static void
	get_next_size (GstChopMyData * chopmydata)
	{
	int begin;
	int end;

	begin = (chopmydata->min_size + chopmydata->step_size - 1) /
	chopmydata->step_size;
	end = (chopmydata->max_size + chopmydata->step_size) / chopmydata->step_size;

	if (begin >= end) {
	chopmydata->next_size = begin * chopmydata->step_size;
	return;
	}

	chopmydata->next_size =
	g_rand_int_range (chopmydata->rand, begin, end) * chopmydata->step_size;
	}

	static GstFlowReturn
	gst_chop_my_data_process (GstChopMyData * chopmydata, gboolean flush)
	{
	GstFlowReturn ret = GST_FLOW_OK;
	GstBuffer *buffer;

	if (chopmydata->next_size == 0) {
	get_next_size (chopmydata);
	}

	while (gst_adapter_available (chopmydata->adapter) >= chopmydata->next_size) {
	buffer =
	gst_adapter_take_buffer (chopmydata->adapter, chopmydata->next_size);

	GST_BUFFER_PTS (buffer) = gst_adapter_prev_pts (chopmydata->adapter, NULL);
	GST_BUFFER_DTS (buffer) = gst_adapter_prev_dts (chopmydata->adapter, NULL);

	chopmydata->next_size = 0;

	ret = gst_pad_push (chopmydata->srcpad, buffer);
	if (ret != GST_FLOW_OK) {
	return ret;
	}

	get_next_size (chopmydata);
	}

	if (flush) {
	guint min_size = chopmydata->min_size;

	while (gst_adapter_available (chopmydata->adapter) >= min_size) {
	buffer = gst_adapter_take_buffer (chopmydata->adapter, min_size);
	ret = gst_pad_push (chopmydata->srcpad, buffer);
	if (ret != GST_FLOW_OK)
	break;
	}
	gst_adapter_clear (chopmydata->adapter);
	}

	return ret;
	}

	static GstFlowReturn
	gst_chop_my_data_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
	{
	GstChopMyData *chopmydata;
	GstFlowReturn ret;

	chopmydata = GST_CHOP_MY_DATA (parent);

	GST_DEBUG_OBJECT (chopmydata, "chain");

	gst_adapter_push (chopmydata->adapter, buffer);
	ret = gst_chop_my_data_process (chopmydata, FALSE);

	return ret;
	}

	static gboolean
	gst_chop_my_data_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
	{
	gboolean res;
	GstChopMyData *chopmydata;

	chopmydata = GST_CHOP_MY_DATA (parent);

	GST_DEBUG_OBJECT (chopmydata, "event");

	switch (GST_EVENT_TYPE (event)) {
	case GST_EVENT_FLUSH_START:
	res = gst_pad_push_event (chopmydata->srcpad, event);
	break;
	case GST_EVENT_FLUSH_STOP:
	gst_adapter_clear (chopmydata->adapter);
	res = gst_pad_push_event (chopmydata->srcpad, event);
	break;
	case GST_EVENT_SEGMENT:
	res = gst_pad_push_event (chopmydata->srcpad, event);
	break;
	case GST_EVENT_EOS:
	gst_chop_my_data_process (chopmydata, TRUE);
	res = gst_pad_push_event (chopmydata->srcpad, event);
	break;
	default:
	res = gst_pad_push_event (chopmydata->srcpad, event);
	break;
	}

	return res;
	}

	static gboolean
	gst_chop_my_data_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
	{
	gboolean res;
	GstChopMyData *chopmydata;

	chopmydata = GST_CHOP_MY_DATA (parent);

	GST_DEBUG_OBJECT (chopmydata, "event");

	switch (GST_EVENT_TYPE (event)) {
	case GST_EVENT_SEEK:
	res = gst_pad_push_event (chopmydata->sinkpad, event);
	break;
	default:
	res = gst_pad_push_event (chopmydata->sinkpad, event);
	break;
	}

	return res;
	}