/* GStreamer MythTV Plug-in

 * Copyright (C) <2006> Rosfran Borges <rosfran.borges@indt.org.br>

 *

 * 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.

 */

/**

 * SECTION:element-mythtvsrc

 *

 * <refsect2>

 * <para>

 * MythTVSrc allows to access a remote MythTV backend streaming Video/Audio server,

 * and to render audio and video content through a TCP/IP connection to a specific

 * port on this server, and based on a known MythTV protocol that is based on 

 * some message passing, such as REQUEST_BLOCK on a specified number of bytes, to get

 * some chunk of remote file data.

 * You should pass the information aboute the remote MythTV backend server 

 * through the <link linkend="GstMythTVSrc--location">location</link> property.

 * </para>

 * <title>Examples</title>

 * <para>

 * If you want to get the LiveTV content (set channel, TV tuner, RemoteEncoder, 

 * Recorder),

 * put the following URI:

 * 

 * <programlisting> 

 *  myth://xxx.xxx.xxx.xxx:6543/livetv?channel=BBC

 * </programlisting>

 *

 * This URI will say to the gmyth library to configure the Recorder instance (used to

 * change the channel, start the TV multimedia content transmition, etc.), using

 * the IP address (xxx.xxx.xxx.xxx) and port number (6543) of the MythTV backend 

 * server, and setting the channel name to "BBC". 

 * 

 * To get a already recorded the MythTV NUV file, put the following URI:

 * 

 * <programlisting>

 *  myth://xxx.xxx.xxx.xxx:6543/filename.nuv

 * </programlisting>

 *

 * This URI will say to the gmyth library to configure the Recorder instance (used to

 * change the channel, start the TV multimedia content transmition, etc.), using

 * the IP address (xxx.xxx.xxx.xxx) and port number (6543) of the MythTV backend 

 * server, and setting the channel name to "BBC".

 * 

 * Another possible way to use the LiveTV content, and just in the case you want to 

 * use the mysql database, put the location URI in the following format:

 * 

 * <programlisting> 

 *  myth://mythtv:mythtv@xxx.xxx.xxx.xxx:6543/?mythconverg&channel=9

 * </programlisting>

 * 

 * Where the first field is the protocol (myth), the second and third are user 

 * name (mythtv) and password (mythtv), then backend host name and port number, 

 * and the last field is the database name (mythconverg).

 * </para>

 * </refsect2>

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include "gstmythtvsrc.h"

#include <gmyth/gmyth_file.h>

#include <gmyth/gmyth_file_transfer.h>

#include <gmyth/gmyth_file_local.h>

#include <gmyth/gmyth_livetv.h>

#include <gmyth/gmyth_socket.h>

#include <gmyth/gmyth_tvchain.h>

#include <string.h>

#include <unistd.h>

GST_DEBUG_CATEGORY_STATIC(mythtvsrc_debug);

#define GST_CAT_DEFAULT mythtvsrc_debug

#define GST_GMYTHTV_ID_NUM                  1

#define GST_GMYTHTV_CHANNEL_DEFAULT_NUM     (-1)

#define GMYTHTV_VERSION_DEFAULT			        30

#define GMYTHTV_TRANSFER_MAX_WAITS          100

#define GMYTHTV_TRANSFER_MAX_RESENDS        2

#define GMYTHTV_TRANSFER_MAX_BUFFER         (128*1024)

#define MAX_READ_SIZE                       (4*1024)

#define GST_FLOW_ERROR_NO_DATA              (-101)

#define REQUEST_MAX_SIZE                    (64*1024)

#define INTERNAL_BUFFER_SIZE                (90*1024)

static const GstElementDetails gst_mythtv_src_details =

GST_ELEMENT_DETAILS("MythTV client source",

					"Source/Network",

					"Control and receive data as a client over the network "

					"via raw socket connections using the MythTV protocol",

					"Rosfran Borges <rosfran.borges@indt.org.br>");

static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE("src",

																  GST_PAD_SRC,

																  GST_PAD_ALWAYS,

																  GST_STATIC_CAPS_ANY);

	/* GST_STATIC_CAPS ("video/x-nuv")); */

enum

{

  PROP_0,

  PROP_LOCATION,

#ifndef GST_DISABLE_GST_DEBUG

  PROP_GMYTHTV_DBG,

#endif

  PROP_GMYTHTV_VERSION,

  PROP_GMYTHTV_LIVE,

  PROP_GMYTHTV_LIVEID,

  PROP_GMYTHTV_LIVE_CHAINID,

  PROP_GMYTHTV_ENABLE_TIMING_POSITION,

  PROP_GMYTHTV_CHANNEL_NUM,

  PROP_GMYTHTV_MAX_TRY

};

static void gst_mythtv_src_clear(GstMythtvSrc * mythtv_src);

static void gst_mythtv_src_finalize(GObject * gobject);

static GstFlowReturn gst_mythtv_src_create(GstPushSrc * psrc,

										   GstBuffer ** outbuf);

static gboolean gst_mythtv_src_start(GstBaseSrc * bsrc);

static gboolean gst_mythtv_src_stop(GstBaseSrc * bsrc);

static gboolean gst_mythtv_src_get_size(GstBaseSrc * bsrc, guint64 * size);

static gboolean gst_mythtv_src_is_seekable(GstBaseSrc * push_src);

static gboolean gst_mythtv_src_do_seek(GstBaseSrc * base,

									   GstSegment * segment);

static GstStateChangeReturn

gst_mythtv_src_change_state(GstElement * element, GstStateChange transition);

static void gst_mythtv_src_set_property(GObject * object, guint prop_id,

										const GValue * value,

										GParamSpec * pspec);

static void gst_mythtv_src_get_property(GObject * object, guint prop_id,

										GValue * value, GParamSpec * pspec);

static void gst_mythtv_src_uri_handler_init(gpointer g_iface,

											gpointer iface_data);

static gboolean gst_mythtv_src_handle_query(GstPad * pad, GstQuery * query);

static gboolean gst_mythtv_src_handle_event(GstPad * pad, GstEvent * event);

static GMythFileReadResult do_read_request_response(GstMythtvSrc * src,

													guint size,

													GByteArray * data_ptr);

static void

_urihandler_init(GType type)

{

  static const GInterfaceInfo urihandler_info = {

	gst_mythtv_src_uri_handler_init,

	NULL,

	NULL

  };

  g_type_add_interface_static(type, GST_TYPE_URI_HANDLER, &urihandler_info);

  GST_DEBUG_CATEGORY_INIT(mythtvsrc_debug, "mythtvsrc", 0, "MythTV src");

}

GST_BOILERPLATE_FULL(GstMythtvSrc, gst_mythtv_src, GstPushSrc,

					 GST_TYPE_PUSH_SRC, _urihandler_init)

	 static void gst_mythtv_src_base_init(gpointer g_class)

{

  GstElementClass *element_class = GST_ELEMENT_CLASS(g_class);

  gst_element_class_add_pad_template(element_class,

									 gst_static_pad_template_get

									 (&srctemplate));

  gst_element_class_set_details(element_class, &gst_mythtv_src_details);

  element_class->change_state = gst_mythtv_src_change_state;

}

static void

gst_mythtv_src_class_init(GstMythtvSrcClass * klass)

{

  GObjectClass *gobject_class;

  GstPushSrcClass *gstpushsrc_class;

  GstBaseSrcClass *gstbasesrc_class;

  gobject_class = (GObjectClass *) klass;

  gstbasesrc_class = (GstBaseSrcClass *) klass;

  gstpushsrc_class = (GstPushSrcClass *) klass;

  gobject_class->set_property = gst_mythtv_src_set_property;

  gobject_class->get_property = gst_mythtv_src_get_property;

  gobject_class->finalize = gst_mythtv_src_finalize;

  g_object_class_install_property

	(gobject_class, PROP_LOCATION,

	 g_param_spec_string("location", "Location",

						 "The location. In the form:"

						 "\n\t\t\tmyth://a.com/file.nuv"

						 "\n\t\t\tmyth://a.com:23223/file.nuv "

						 "\n\t\t\ta.com/file.nuv - default scheme 'myth'",

						 "", G_PARAM_READWRITE));

  g_object_class_install_property

	(gobject_class, PROP_GMYTHTV_VERSION,

	 g_param_spec_int("mythtv-version", "mythtv-version",

					  "Change MythTV version", 26, 30, 26,

					  G_PARAM_READWRITE));

  g_object_class_install_property

	(gobject_class, PROP_GMYTHTV_LIVEID,

	 g_param_spec_int("mythtv-live-id", "mythtv-live-id",

					  "Change MythTV version",

					  0, 200, GST_GMYTHTV_ID_NUM, G_PARAM_READWRITE));

  g_object_class_install_property

	(gobject_class, PROP_GMYTHTV_LIVE_CHAINID,

	 g_param_spec_string("mythtv-live-chainid", "mythtv-live-chainid",

						 "Sets the MythTV chain ID (from TV Chain)", "",

						 G_PARAM_READWRITE));

  g_object_class_install_property

	(gobject_class, PROP_GMYTHTV_LIVE,

	 g_param_spec_boolean("mythtv-live", "mythtv-live",

						  "Enable MythTV Live TV content streaming", FALSE,

						  G_PARAM_READWRITE));

  g_object_class_install_property

	(gobject_class, PROP_GMYTHTV_ENABLE_TIMING_POSITION,

	 g_param_spec_boolean("mythtv-enable-timing-position",

						  "mythtv-enable-timing-position",

						  "Enable MythTV Live TV content size continuous updating",

						  FALSE, G_PARAM_READWRITE));

  g_object_class_install_property

	(gobject_class, PROP_GMYTHTV_CHANNEL_NUM,

	 g_param_spec_string("mythtv-channel", "mythtv-channel",

						 "Change MythTV channel number",

						 "", G_PARAM_READWRITE));

  g_object_class_install_property

	(gobject_class, PROP_GMYTHTV_MAX_TRY,

	 g_param_spec_int("max-try", "max-try",

					  "Set the max try for get MythTV free recorder",

					  0, G_MAXINT, 10, G_PARAM_READWRITE));

#ifndef GST_DISABLE_GST_DEBUG

  g_object_class_install_property

	(gobject_class, PROP_GMYTHTV_DBG,

	 g_param_spec_boolean("mythtv-debug", "mythtv-debug",

						  "Enable MythTV debug messages", FALSE,

						  G_PARAM_READWRITE));

#endif

  gstbasesrc_class->start = gst_mythtv_src_start;

  gstbasesrc_class->stop = gst_mythtv_src_stop;

  gstbasesrc_class->get_size = gst_mythtv_src_get_size;

  gstbasesrc_class->is_seekable = gst_mythtv_src_is_seekable;

  gstbasesrc_class->do_seek = gst_mythtv_src_do_seek;

  gstpushsrc_class->create = gst_mythtv_src_create;

  GST_DEBUG_CATEGORY_INIT(mythtvsrc_debug, "mythtvsrc", 0,

						  "MythTV Client Source");

}

static void

gst_mythtv_src_init(GstMythtvSrc * this, GstMythtvSrcClass * g_class)

{

  this->file = NULL;

  this->unique_setup = FALSE;

  this->mythtv_version = GMYTHTV_VERSION_DEFAULT;

  this->state = GST_MYTHTV_SRC_FILE_TRANSFER;

  this->bytes_read = 0;

  this->prev_content_size = 0;

  this->content_size = 0;

  this->read_offset = 0;

  this->content_size_last = 0;

  this->live_tv = FALSE;

  this->enable_timing_position = FALSE;

  this->update_prog_chain = FALSE;

  this->user_agent = g_strdup("mythtvsrc");

  this->update_prog_chain = FALSE;

  this->channel_name = NULL;

  this->eos = FALSE;

  this->bytes_queue = NULL;

  this->wait_to_transfer = 0;

  gst_base_src_set_format(GST_BASE_SRC(this), GST_FORMAT_BYTES);

  gst_pad_set_event_function(GST_BASE_SRC_PAD(GST_BASE_SRC(this)),

							 gst_mythtv_src_handle_event);

  gst_pad_set_query_function(GST_BASE_SRC_PAD(GST_BASE_SRC(this)),

							 gst_mythtv_src_handle_query);

}

static void

gst_mythtv_src_clear(GstMythtvSrc * mythtv_src)

{

  mythtv_src->unique_setup = FALSE;

  if (mythtv_src->spawn_livetv)

	{

	  g_object_unref(mythtv_src->spawn_livetv);

	  mythtv_src->spawn_livetv = NULL;

	}

  if (mythtv_src->file)

	{

	  g_object_unref(mythtv_src->file);

	  mythtv_src->file = NULL;

	}

  if (mythtv_src->backend_info)

	{

	  g_object_unref(mythtv_src->backend_info);

	  mythtv_src->backend_info = NULL;

	}

  if (mythtv_src->bytes_queue)

	{

	  g_byte_array_free(mythtv_src->bytes_queue, TRUE);

	  mythtv_src->bytes_queue = NULL;

	}

}

static void

gst_mythtv_src_finalize(GObject * gobject)

{

  GstMythtvSrc *this = GST_MYTHTV_SRC(gobject);

  gst_mythtv_src_clear(this);

  if (this->uri_name)

	{

	  g_free(this->uri_name);

	  this->uri_name = NULL;

	}

  if (this->user_agent)

	{

	  g_free(this->user_agent);

	  this->user_agent = NULL;

	}

  G_OBJECT_CLASS(parent_class)->finalize(gobject);

}

static GMythFileReadResult

do_read_request_response(GstMythtvSrc * src, guint size,

						 GByteArray * data_ptr)

{

  gint read = 0;

  guint sizetoread = size;

  gint max_iters = GMYTHTV_TRANSFER_MAX_RESENDS;

  GMythFileReadResult result;

  GST_LOG_OBJECT(src, "Starting: Reading %d bytes...", sizetoread);

 /* Loop sending the Myth File Transfer request:

  * Retry whilst authentication fails and we supply it. */

  while (sizetoread == size && --max_iters > 0)

	{

	 /* if ( gmyth_backend_info_is_local_file(src->backend_info) ) */

	  if (IS_GMYTH_FILE_LOCAL(src->file))

		result = gmyth_file_local_read(GMYTH_FILE_LOCAL(src->file),

									   data_ptr, sizetoread, src->live_tv);

	  else if (IS_GMYTH_FILE_TRANSFER(src->file))

		result = gmyth_file_transfer_read(GMYTH_FILE_TRANSFER(src->file),

										  data_ptr, sizetoread, src->live_tv);

	  if (data_ptr->len > 0)

		{

		  read += data_ptr->len;

		  sizetoread -= data_ptr->len;

		}

	  else if (data_ptr->len <= 0)

		{

		  if (src->live_tv == FALSE)

			{

			  result = GMYTH_FILE_READ_EOF;

			  goto eos;

			}

		  else

			{

			  if (result == GMYTH_FILE_READ_ERROR)

				{				/* -314 */

				  GST_INFO_OBJECT(src, "[LiveTV] FileTransfer READ_ERROR!");

				  goto done;

				}

			  else if (result == GMYTH_FILE_READ_NEXT_PROG_CHAIN)

				{				/* -315 */

				  GST_INFO_OBJECT(src,

								  "[LiveTV] FileTransfer - Go to athe next program chain!");

				  src->update_prog_chain = TRUE;

				  continue;

				}

			  goto done;

			}

		}						/* else if (data_ptr->len == 0)

								   goto done; */

	  if (read == sizetoread)

		goto done;

	}

  if ((read < 0 && !src->live_tv) || max_iters == 0)

	{

	  result = GMYTH_FILE_READ_EOF;

	  goto eos;

	}

  goto done;

eos:

  src->eos = TRUE;

done:

  return result;

}

static GstFlowReturn

gst_mythtv_src_create(GstPushSrc * psrc, GstBuffer ** outbuf)

{

  GstMythtvSrc *src;

  GstFlowReturn ret = GST_FLOW_OK;

  guint buffer_size_inter = 0;

  src = GST_MYTHTV_SRC(psrc);

 /* The caller should know the number of bytes and not read beyond EOS. */

  if (G_UNLIKELY(src->eos))

	goto eos;

  GST_DEBUG_OBJECT(src, "offset = %" G_GUINT64_FORMAT ", size = %d...",

				   src->read_offset, MAX_READ_SIZE);

  GST_DEBUG_OBJECT(src, "Create: buffer_remain: %d, buffer_size = %d.",

				   (gint) src->buffer_remain, src->bytes_queue->len);

program_chain_changed:

 /* just get from the byte array, no network effort... */

  if ((src->buffer_remain = src->bytes_queue->len) < MAX_READ_SIZE)

	{

	  GByteArray *buffer;

	  GMythFileReadResult result = GMYTH_FILE_READ_OK;

	  buffer = NULL;

	  buffer_size_inter = (INTERNAL_BUFFER_SIZE - src->buffer_remain);

	  if (buffer_size_inter > REQUEST_MAX_SIZE)

		buffer_size_inter = REQUEST_MAX_SIZE;

	  buffer = g_byte_array_new();

	  result = do_read_request_response(src, buffer_size_inter, buffer);

	 /* got the next program info? */

	  if (G_UNLIKELY(src->update_prog_chain)

		  || (result == GMYTH_FILE_READ_NEXT_PROG_CHAIN))

		{

		  GST_DEBUG_OBJECT(src, "Update PROGRAM CHAIN!!! buffer_size = %d.",

						   src->bytes_queue->len);

		  gst_pad_push_event(GST_BASE_SRC_PAD(GST_BASE_SRC(psrc)),

							 gst_event_new_custom(GST_EVENT_CUSTOM_DOWNSTREAM,

												  NULL));

/*

      gst_pad_push_event (GST_BASE_SRC_PAD (GST_BASE_SRC (psrc)),

		      gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_BYTES, 0, -1, 0));

*/

		  src->update_prog_chain = FALSE;

		  src->eos = FALSE;

		  if (result == GMYTH_FILE_READ_NEXT_PROG_CHAIN)

			{

			 /*

			    if  (buffer != NULL) {

			    g_byte_array_free (buffer, TRUE);

			    buffer = NULL;

			    }

			    goto program_chain_changed; */

			}

		  else if (result == GMYTH_FILE_READ_OK)

			{

			 /* remove wasteful, NUV file header data */

			 /* buffer = g_byte_array_remove_range( buffer, 0, 512 ); */

			 /* TODO: need to send a new segment event to NUVDemux? */

			 //gst_pad_push_event (GST_BASE_SRC_PAD (GST_BASE_SRC (psrc)),

			 //      gst_event_new_new_segment (TRUE, 1.0, GST_FORMAT_BYTES, 0, -1, 0));

			 /* goto change_progchain; */

			}

		}						/* */

	  if (G_UNLIKELY(buffer->len < 0))

		{

		  if (buffer != NULL)

			{

			  g_byte_array_free(buffer, TRUE);

			  buffer = NULL;

			}

		  if (src->live_tv || (result == GMYTH_FILE_READ_NEXT_PROG_CHAIN))

			goto change_progchain;

		  else

			goto read_error;

		}

	  else if (G_UNLIKELY(buffer->len == 0))

		{

		  if (buffer != NULL)

			{

			  g_byte_array_free(buffer, TRUE);

			  buffer = NULL;

			}

		  if (!src->live_tv)

			goto done;

		  else

			goto program_chain_changed;

		}

	  src->bytes_queue =

		g_byte_array_append(src->bytes_queue, buffer->data, buffer->len);

	  if (buffer->len > buffer_size_inter)

		GST_WARNING_OBJECT(src,

						   "INCREASED buffer size! Backend sent more than we ask him... (%d)",

						   abs(buffer->len - buffer_size_inter));

	  src->buffer_remain += buffer->len;

	  if (buffer != NULL)

		{

		  g_byte_array_free(buffer, TRUE);

		  buffer = NULL;

		}

	 /*

	    GST_DEBUG_OBJECT (src,

	    "BYTES READ (actual) = %d, BYTES READ (cumulative) = %llu, "

	    "OFFSET = %llu, CONTENT SIZE = %llu.", read,

	    src->bytes_read, src->read_offset, src->content_size);

	  */

	}

  guint buffer_size =

	(src->buffer_remain < MAX_READ_SIZE) ? src->buffer_remain : MAX_READ_SIZE;

  *outbuf = gst_buffer_new();

 /*

    GST_DEBUG_OBJECT (src, "read from network? %s!, buffer_remain = %d",

    (buffer_size_inter ==

    0) ? "NO, got from buffer" : "YES, go see the backend's log file",

    src->buffer_remain);

  */

  GST_BUFFER_SIZE(*outbuf) = buffer_size;

  GST_BUFFER_MALLOCDATA(*outbuf) = g_malloc0(GST_BUFFER_SIZE(*outbuf));

  GST_BUFFER_DATA(*outbuf) = GST_BUFFER_MALLOCDATA(*outbuf);

  g_memmove(GST_BUFFER_DATA((*outbuf)), src->bytes_queue->data,

			GST_BUFFER_SIZE(*outbuf));

  GST_BUFFER_OFFSET(*outbuf) = src->read_offset;

  GST_BUFFER_OFFSET_END(*outbuf) =

	src->read_offset + GST_BUFFER_SIZE(*outbuf);

  src->buffer_remain -= GST_BUFFER_SIZE(*outbuf);

  src->read_offset += GST_BUFFER_SIZE(*outbuf);

  src->bytes_read += GST_BUFFER_SIZE(*outbuf);

 //GST_DEBUG_OBJECT (src, "Buffer output with size: %d",

 //    GST_BUFFER_SIZE (*outbuf));

 /* flushs the newly buffer got from byte array */

  src->bytes_queue =

	g_byte_array_remove_range(src->bytes_queue, 0, buffer_size);

  if (G_UNLIKELY(src->eos) || (!src->live_tv

							   && (src->bytes_read >= src->content_size)))

	goto eos;

done:

  {

	const gchar *reason = gst_flow_get_name(ret);

	return ret;

  }

eos:

  {

	const gchar *reason = gst_flow_get_name(ret);

	GST_DEBUG_OBJECT(src, "pausing task, reason %s", reason);

	return GST_FLOW_UNEXPECTED;

  }

 /* ERRORS */

read_error:

  {

	GST_ELEMENT_ERROR(src, RESOURCE, READ,

					  (NULL), ("Could not read any bytes (%i, %s)", read,

							   src->uri_name));

	return GST_FLOW_ERROR;

  }

change_progchain:

  {

	GST_ELEMENT_ERROR(src, RESOURCE, READ,

					  (NULL),

					  ("Seek failed, go to the next program info... (%i, %s)",

					   read, src->uri_name));

/* TODO: need to send a new segment event to NUVDemux? */

	gst_pad_push_event(GST_BASE_SRC_PAD(GST_BASE_SRC(psrc)),

					   gst_event_new_new_segment(TRUE, 1.0, GST_FORMAT_TIME,

												 0, -1, 0));

	goto program_chain_changed;

  }

}

gint64

gst_mythtv_src_get_position(GstMythtvSrc * src)

{

  gint64 size_tmp = 0;

  guint max_tries = 2;

  if (src->live_tv == TRUE && (abs(src->content_size - src->bytes_read) <

							   GMYTHTV_TRANSFER_MAX_BUFFER))

	{

	get_file_pos:

	  g_usleep(10);

	  size_tmp =

		gmyth_recorder_get_file_position(src->spawn_livetv->recorder);

	  if (size_tmp > (src->content_size + GMYTHTV_TRANSFER_MAX_BUFFER))

		src->content_size = size_tmp;

	  else if (size_tmp > 0 && --max_tries > 0)

		goto get_file_pos;

	  GST_LOG_OBJECT(src, "GET_POSITION: file_position = %lld", size_tmp);

	 /* sets the last content size amount before it can be updated */

	  src->prev_content_size = src->content_size;

	}

  return src->content_size;

}

static gboolean

gst_mythtv_src_do_seek(GstBaseSrc * base, GstSegment * segment)

{

  GstMythtvSrc *src = GST_MYTHTV_SRC(base);

  gint64 new_offset = -1;

  gint64 actual_seek = segment->start;

  gboolean ret = TRUE;

  GST_LOG_OBJECT(src, "seek, segment: %" GST_SEGMENT_FORMAT, segment);

  if (segment->format == GST_FORMAT_TIME)

	{

	  goto done;

	}

  GST_LOG_OBJECT(src,

				 "Trying to seek at the value (actual_seek = %lld, read_offset = %lld)",

				 actual_seek, src->read_offset);

 /* verify if it needs to seek */

  if (src->read_offset != actual_seek)

	{

	 /* if ( gmyth_backend_info_is_local_file(src->backend_info) ) */

	  if (IS_GMYTH_FILE_LOCAL(src->file))

		new_offset =

		  gmyth_file_local_seek(GMYTH_FILE_LOCAL(src->file), segment->start,

								G_SEEK_SET);

	  else if (IS_GMYTH_FILE_TRANSFER(src->file))

		new_offset =

		  gmyth_file_transfer_seek(GMYTH_FILE_TRANSFER(src->file),

								   segment->start, SEEK_SET);

	  GST_LOG_OBJECT(src,

					 "Segment offset start = %lld, SRC Offset = %lld, NEW actual backend SEEK Offset = %lld.",

					 segment->start, src->read_offset, new_offset);

	  if (G_UNLIKELY(new_offset < 0))

		{

		  ret = FALSE;

		  if (!src->live_tv)

			goto eos;

		}

	  src->read_offset = new_offset;

	  if (ret == FALSE)

		{

		  GST_INFO_OBJECT(src, "Failed to set the SEEK on segment!");

		}

	}

done:

  return ret;

eos:

  {

	GST_DEBUG_OBJECT(src, "EOS found on seeking!!!");

	return FALSE;

  }

}

/* create a socket for connecting to remote server */

static gboolean

gst_mythtv_src_start(GstBaseSrc * bsrc)

{

  GstMythtvSrc *src = GST_MYTHTV_SRC(bsrc);

  GString *chain_id_local = NULL;

  GMythURI *gmyth_uri = NULL;

  gboolean ret = TRUE;

  GstMessage *msg;

  if (src->unique_setup == FALSE)

	{

	  src->unique_setup = TRUE;

	}

  else

	{

	  goto done;

	}

  gmyth_uri = gmyth_uri_new_with_value(src->uri_name);

  src->backend_info = gmyth_backend_info_new_with_uri(src->uri_name);

  src->live_tv = gmyth_uri_is_livetv(gmyth_uri);

 /* testing UPnP... */

 /* gmyth_backend_info_set_hostname( src->backend_info, NULL ); */

  if (src->live_tv)

	{

	  src->spawn_livetv = gmyth_livetv_new(src->backend_info);

	  gchar *ch = gmyth_uri_get_channel_name(gmyth_uri);

	  if (ch != NULL)

		src->channel_name = ch;

	  if (src->channel_name != NULL)

		{

		  gboolean result;

		  result =

			gmyth_livetv_channel_name_setup(src->spawn_livetv,

											src->channel_name);

		  if (result == FALSE)

			{

			  GST_INFO_OBJECT(src, "LiveTV setup felt down on error");

			  ret = FALSE;

			  goto init_failed;

			}

		}

	  else

		{

		  if (gmyth_livetv_setup(src->spawn_livetv) == FALSE)

			{

			  GST_INFO_OBJECT(src, "LiveTV setup felt down on error");

			  ret = FALSE;

			  goto init_failed;

			}

		}

	 /* testing change channel... */

	 /* gmyth_recorder_change_channel( src->spawn_livetv->recorder, CHANNEL_DIRECTION_UP ); */

	  src->file =

		GMYTH_FILE(gmyth_livetv_create_file_transfer(src->spawn_livetv));

	  if (NULL == src->file)

		{

		  GST_INFO_OBJECT(src, "[LiveTV] FileTransfer equals to NULL");

		  ret = FALSE;

		  goto init_failed;

		}

	 /* Check if the file is local to this specific client renderer */

	  if (gmyth_uri_is_local_file(gmyth_uri))

		ret = gmyth_file_local_open(GMYTH_FILE_LOCAL(src->file));

	  else

		ret =

		  gmyth_file_transfer_open(GMYTH_FILE_TRANSFER(src->file),

								   src->spawn_livetv->uri !=

								   NULL ? gmyth_uri_get_path(src->

															 spawn_livetv->

															 uri) : src->

								   spawn_livetv->proginfo->pathname->str);

	 /* sets the mythtvsrc "location" property */

	  g_object_set(src, "location", gmyth_file_get_uri(src->file), NULL);

	  if (!ret)

		{

		  GST_INFO_OBJECT(src,

						  "Error: couldn't open the FileTransfer from LiveTV source!");

		  g_object_unref(src->file);

		  src->file = NULL;

		  goto init_failed;

		}

	}

  else

	{

	 /* Check if the file is local to this specific client renderer, and tries to open

	  * a local connection

	  */

	  if (gmyth_uri_is_local_file(gmyth_uri))

		{

		  src->file = GMYTH_FILE(gmyth_file_local_new(src->backend_info));

		  ret = gmyth_file_local_open(GMYTH_FILE_LOCAL(src->file));

		}

	  else

		{

		  src->file = GMYTH_FILE(gmyth_file_transfer_new(src->backend_info));

		  ret =

			gmyth_file_transfer_open(GMYTH_FILE_TRANSFER(src->file),

									 src->uri_name);

		}

	}							/* if (else) - recorded FileTransfer */

  if (NULL == src->file)

	{

	  GST_INFO_OBJECT(src, "FileTransfer is NULL");

	  goto init_failed;

	}

 /*GST_INFO_OBJECT( src, "uri = %s", src->spawn_livetv->file); */

  if (ret == FALSE)

	{

#ifndef GST_DISABLE_GST_DEBUG

	  if (src->mythtv_msgs_dbg)

		GST_INFO_OBJECT(src,

						"MythTV FileTransfer request failed when setting up socket connection!");

#endif

	  goto begin_req_failed;

	}

  GST_INFO_OBJECT(src,

				  "MythTV FileTransfer filesize = %lld, content_size = %lld!",

				  gmyth_file_get_filesize(src->file), src->content_size);

  src->content_size = gmyth_file_get_filesize(src->file);

  msg =

	gst_message_new_duration(GST_OBJECT(src), GST_FORMAT_BYTES,

							 src->content_size);

  gst_element_post_message(GST_ELEMENT(src), msg);

  src->do_start = FALSE;

 /* this is used for the buffer cache */

  src->bytes_queue = g_byte_array_sized_new(INTERNAL_BUFFER_SIZE);

  src->buffer_remain = 0;

  gst_pad_push_event(GST_BASE_SRC_PAD(GST_BASE_SRC(src)),

					 gst_event_new_new_segment(TRUE, 1.0, GST_FORMAT_TIME, 0,

											   src->content_size, 0));

done:

  if (gmyth_uri != NULL)

	{

	  g_object_unref(gmyth_uri);

	  gmyth_uri = NULL;

	}

  if (chain_id_local != NULL)

	{

	  g_string_free(chain_id_local, TRUE);

	  chain_id_local = NULL;

	}

  return TRUE;

 /* ERRORS */

init_failed:

  if (gmyth_uri != NULL)

	{

	  g_object_unref(gmyth_uri);

	  gmyth_uri = NULL;

	}

  if (src->spawn_livetv != NULL)

	{

	  g_object_unref(src->spawn_livetv);

	  src->spawn_livetv = NULL;

	}

  GST_ELEMENT_ERROR(src, LIBRARY, INIT,

					(NULL), ("Could not initialize MythTV library (%i, %s)",

							 ret, src->uri_name));

  gst_mythtv_src_clear(src);

  return FALSE;

begin_req_failed:

  if (gmyth_uri != NULL)

	{

	  g_object_unref(gmyth_uri);

	  gmyth_uri = NULL;

	}

  GST_ELEMENT_ERROR(src, LIBRARY, INIT,

					(NULL),

					("Could not begin request sent to MythTV server (%i, %s)",

					 ret, src->uri_name));

  return FALSE;

}

static gboolean

gst_mythtv_src_get_size(GstBaseSrc * bsrc, guint64 * size)

{

  GstMythtvSrc *src = GST_MYTHTV_SRC(bsrc);

  gboolean ret = TRUE;

  GST_LOG_OBJECT(src, "Differs from previous content size: %d (max.: %d)",

				 abs(src->content_size - src->prev_content_size),

				 GMYTHTV_TRANSFER_MAX_BUFFER);

  if (src->live_tv)

	{

	  ret = FALSE;

	}

  else if (src->live_tv && src->enable_timing_position

		   && (abs(src->content_size - src->bytes_read) <

			   GMYTHTV_TRANSFER_MAX_BUFFER))

	{

	  gint64 new_offset =

		gmyth_recorder_get_file_position(src->spawn_livetv->recorder);

	  if (new_offset > 0 && new_offset > src->content_size)

		{

		  src->content_size = new_offset;

		}

	  else if (new_offset < src->content_size)

		{

		  src->update_prog_chain = TRUE;

		}

	}

  *size = src->content_size;

  GST_LOG_OBJECT(src, "Content size = %lld", src->content_size);

  return ret;