/* 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;

 }

 /* close the socket and associated resources

  * used both to recover from errors and go to NULL state */

 static gboolean

 gst_mythtv_src_stop(GstBaseSrc * bsrc)

 {

   GstMythtvSrc *src = GST_MYTHTV_SRC(bsrc);

   gst_mythtv_src_clear(src);

  /* src->eos = FALSE; */

   return TRUE;

 }

 static gboolean

 gst_mythtv_src_handle_event(GstPad * pad, GstEvent * event)

 {

   GstMythtvSrc *src = GST_MYTHTV_SRC(GST_PAD_PARENT(pad));

   gint64 cont_size = 0;

   gboolean ret = FALSE;

   switch (GST_EVENT_TYPE(event))

 	{

 	case GST_EVENT_EOS:

 	  GST_WARNING_OBJECT(src, "Got EOS event");

 	  if (src->live_tv)

 		{

 		  cont_size = gst_mythtv_src_get_position(src);

 		  if (cont_size > src->content_size)

 			{

 			  src->content_size = cont_size;

 			  src->eos = FALSE;

 			}

 		  else

 			{

 			  src->eos = TRUE;

 			  gst_element_set_state(GST_ELEMENT(src), GST_STATE_NULL);

 			  gst_element_set_locked_state(GST_ELEMENT(src), FALSE);

 			}

 		}

 	  break;

 	default:

 	  ret = gst_pad_event_default(pad, event);

 	}

   return ret;

 }

 static gboolean

 gst_mythtv_src_is_seekable(GstBaseSrc * push_src)

 {

   return TRUE;

 }

 static gboolean

 gst_mythtv_src_handle_query(GstPad * pad, GstQuery * query)

 {

   gboolean res = FALSE;

   GstMythtvSrc *myth = GST_MYTHTV_SRC(gst_pad_get_parent(pad));

   GstFormat formt;

   switch (GST_QUERY_TYPE(query))

 	{

 	case GST_QUERY_POSITION:

 	  {

 		gst_query_parse_position(query, &formt, NULL);

 		if (formt == GST_FORMAT_BYTES)

 		  {

 			gst_query_set_position(query, formt, myth->read_offset);

 			GST_DEBUG_OBJECT(myth, "POS %" G_GINT64_FORMAT,

 							 myth->read_offset);

 			res = TRUE;

 		  }

 		else if (formt == GST_FORMAT_TIME)

 		  {

 			res = gst_pad_query_default(pad, query);

 		  }

 		break;

 	  }

 	case GST_QUERY_DURATION:

 	  {

 		gst_query_parse_duration(query, &formt, NULL);

 		if (formt == GST_FORMAT_BYTES)

 		  {

 			gint64 size = myth->content_size;

 			gst_query_set_duration(query, GST_FORMAT_BYTES, 10);

 			GST_DEBUG_OBJECT(myth, "SIZE %" G_GINT64_FORMAT, size);

 			res = TRUE;

 		  }

 		else if (formt == GST_FORMAT_TIME)

 		  {

 			res = gst_pad_query_default(pad, query);

 		  }

 		break;

 	  }

 	default:

 	  {

 		res = gst_pad_query_default(pad, query);

 		break;

 	  }

 	}

   gst_object_unref(myth);

   return res;

 }

 static GstStateChangeReturn

 gst_mythtv_src_change_state(GstElement * element, GstStateChange transition)

 {

   GstStateChangeReturn ret = GST_STATE_CHANGE_FAILURE;

   GstMythtvSrc *src = GST_MYTHTV_SRC(element);

   switch (transition)

 	{

 	case GST_STATE_CHANGE_NULL_TO_READY:

 	  break;

 	case GST_STATE_CHANGE_READY_TO_PAUSED:

 	case GST_STATE_CHANGE_PAUSED_TO_PLAYING:

 	  if (src->live_tv)

 		{

 		  if (!gmyth_recorder_send_frontend_ready_command(src->spawn_livetv->

 														  recorder))

 			GST_WARNING_OBJECT(src,

 							   "Couldn't send the FRONTEND_READY message to the backend!");

 		  else

 			GST_DEBUG_OBJECT(src, "FRONTEND_READY was sent to the backend");

 		}

 	  break;

 	default:

 	  break;

 	}

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

   if (ret == GST_STATE_CHANGE_FAILURE)

 	return ret;

   switch (transition)

 	{

 	case GST_STATE_CHANGE_READY_TO_NULL:

 	  gst_mythtv_src_clear(src);

 	  break;

 	case GST_STATE_CHANGE_PLAYING_TO_PAUSED:

 	case GST_STATE_CHANGE_PAUSED_TO_READY:

 	  break;

 	default:

 	  break;

 	}

   return ret;

 }

 static void

 gst_mythtv_src_set_property(GObject * object, guint prop_id,

 							const GValue * value, GParamSpec * pspec)

 {

   GstMythtvSrc *mythtvsrc = GST_MYTHTV_SRC(object);

   GST_OBJECT_LOCK(mythtvsrc);

   switch (prop_id)

 	{

 	case PROP_LOCATION:

 	  {

 		if (!g_value_get_string(value))

 		  {

 			GST_WARNING("location property cannot be NULL");

 			break;

 		  }

 		if (mythtvsrc->uri_name != NULL)

 		  {

 			g_free(mythtvsrc->uri_name);

 			mythtvsrc->uri_name = NULL;

 		  }

 		mythtvsrc->uri_name = g_value_dup_string(value);

 		break;

 	  }

 #ifndef GST_DISABLE_GST_DEBUG

 	case PROP_GMYTHTV_DBG:

 	  {

 		mythtvsrc->mythtv_msgs_dbg = g_value_get_boolean(value);

 		break;

 	  }

 #endif

 	case PROP_GMYTHTV_VERSION:

 	  {

 		mythtvsrc->mythtv_version = g_value_get_int(value);

 		break;

 	  }

 	case PROP_GMYTHTV_LIVEID:

 	  {

 		mythtvsrc->live_tv_id = g_value_get_int(value);

 		break;

 	  }

 	case PROP_GMYTHTV_LIVE:

 	  {

 		mythtvsrc->live_tv = g_value_get_boolean(value);

 		break;

 	  }

 	case PROP_GMYTHTV_ENABLE_TIMING_POSITION:

 	  {

 		mythtvsrc->enable_timing_position = g_value_get_boolean(value);

 		break;

 	  }

 	case PROP_GMYTHTV_LIVE_CHAINID:

 	  {

 		if (!g_value_get_string(value))

 		  {

 			GST_WARNING("MythTV Live chainid property cannot be NULL");

 			break;

 		  }

 		if (mythtvsrc->live_chain_id != NULL)

 		  {

 			g_free(mythtvsrc->live_chain_id);

 			mythtvsrc->live_chain_id = NULL;

 		  }

 		mythtvsrc->live_chain_id = g_value_dup_string(value);

 		break;

 	  }

 	case PROP_GMYTHTV_CHANNEL_NUM:

 	  {

 		mythtvsrc->channel_name = g_value_dup_string(value);

 		break;

 	  }

 	case PROP_GMYTHTV_MAX_TRY:

 	  {

 		mythtvsrc->max_try = g_value_get_int(value);

 		break;

 	  }

 	default:

 	  G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);

 	  break;

 	}

   GST_OBJECT_UNLOCK(mythtvsrc);

 }

 static void

 gst_mythtv_src_get_property(GObject * object, guint prop_id,

 							GValue * value, GParamSpec * pspec)

 {

   GstMythtvSrc *mythtvsrc = GST_MYTHTV_SRC(object);

   GST_OBJECT_LOCK(mythtvsrc);

   switch (prop_id)

 	{

 	case PROP_LOCATION:

 	  {

 		g_value_set_string(value, mythtvsrc->uri_name);

 		break;

 	  }

 #ifndef GST_DISABLE_GST_DEBUG

 	case PROP_GMYTHTV_DBG:

 	  g_value_set_boolean(value, mythtvsrc->mythtv_msgs_dbg);

 	  break;

 #endif

 	case PROP_GMYTHTV_VERSION:

 	  {

 		g_value_set_int(value, mythtvsrc->mythtv_version);

 		break;

 	  }

 	case PROP_GMYTHTV_LIVEID:

 	  {

 		g_value_set_int(value, mythtvsrc->live_tv_id);

 		break;

 	  }

 	case PROP_GMYTHTV_LIVE:

 	  g_value_set_boolean(value, mythtvsrc->live_tv);

 	  break;

 	case PROP_GMYTHTV_ENABLE_TIMING_POSITION:

 	  g_value_set_boolean(value, mythtvsrc->enable_timing_position);

 	  break;

 	case PROP_GMYTHTV_LIVE_CHAINID:

 	  {

 		g_value_set_string(value, mythtvsrc->live_chain_id);

 		break;

 	  }

 	case PROP_GMYTHTV_CHANNEL_NUM:

 	  {

 		g_value_set_string(value, mythtvsrc->channel_name);

 		break;

 	  }

 	case PROP_GMYTHTV_MAX_TRY:

 	  {

 		g_value_set_int(value, mythtvsrc->max_try);

 		break;

 	  }

 	default:

 	  G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);

 	  break;

 	}

   GST_OBJECT_UNLOCK(mythtvsrc);

 }

 static gboolean

 plugin_init(GstPlugin * plugin)

 {

   return gst_element_register(plugin, "mythtvsrc", GST_RANK_NONE,

 							  GST_TYPE_MYTHTV_SRC);

 }

 GST_PLUGIN_DEFINE(GST_VERSION_MAJOR,

 				  GST_VERSION_MINOR,

 				  "mythtv",

 				  "lib MythTV src",

 				  plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME,

 				  GST_PACKAGE_ORIGIN);

 /*** GSTURIHANDLER INTERFACE *************************************************/

 static guint

 gst_mythtv_src_uri_get_type(void)

 {

   return GST_URI_SRC;

 }

 static gchar **

 gst_mythtv_src_uri_get_protocols(void)

 {

   static gchar *protocols[] = { "myth", "myths", NULL };

   return protocols;

 }

 static const gchar *

 gst_mythtv_src_uri_get_uri(GstURIHandler * handler)

 {

   GstMythtvSrc *src = GST_MYTHTV_SRC(handler);

   return src->uri_name;

 }

 static gboolean

 gst_mythtv_src_uri_set_uri(GstURIHandler * handler, const gchar * uri)

 {

   GstMythtvSrc *src = GST_MYTHTV_SRC(handler);

   gchar *protocol;

   protocol = gst_uri_get_protocol(uri);

   if ((strcmp(protocol, "myth") != 0) && (strcmp(protocol, "myths") != 0))

 	{

 	  g_free(protocol);

 	  return FALSE;

 	}

   g_free(protocol);

   g_object_set(src, "location", uri, NULL);

   return TRUE;

 }

 static void

 gst_mythtv_src_uri_handler_init(gpointer g_iface, gpointer iface_data)

 {

   GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;

   iface->get_type = gst_mythtv_src_uri_get_type;

   iface->get_protocols = gst_mythtv_src_uri_get_protocols;

   iface->get_uri = gst_mythtv_src_uri_get_uri;

   iface->set_uri = gst_mythtv_src_uri_set_uri;

 }

 void

 size_header_handler(void *userdata, const char *value)

 {

   GstMythtvSrc *src = GST_MYTHTV_SRC(userdata);

   GST_DEBUG_OBJECT(src, "content size = %lld bytes", src->content_size);

 }