/* vim: set sw=2: -*- Mode: C; tab-width: 2; indent-tabs-mode: t; c-basic-offset: 2; c-indent-level: 2 -*- */

 /* 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 Lesser 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 

  */

 #ifdef HAVE_CONFIG_H

 #include "config.h"

 #endif

 #include "gstmythtvsrc.h"

 #include <gmyth/gmyth_file_transfer.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 GMYTHTV_VERSION_DEFAULT			30

 #define GMYTHTV_TRANSFER_MAX_WAITS	100

 #define GMYTHTV_TRANSFER_MAX_BUFFER	80*1024

 //( 32*1024  )

 /* 4*1024 ??? */

 #define MAX_READ_SIZE              	12*1024

 //( 32*1024 )

 /* stablish a maximum iteration value to the IS_RECORDING message */

 static guint wait_to_transfer = 0;

 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 ("video/x-nuv") );

 static GStaticMutex update_size_mutex = G_STATIC_MUTEX_INIT;

 enum

 {

   PROP_0,

   PROP_LOCATION,

   PROP_URI,

 #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

 };

 static void gst_mythtv_src_finalize (GObject * gobject);

 static GstFlowReturn gst_mythtv_src_create (GstBaseSrc * psrc, guint64 offset, 

 	guint size, 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_next_program_chain ( GstMythtvSrc *src );

 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_event (GstPad * pad, GstEvent * event);

 //static gboolean gst_mythtv_src_query ( GstPad * pad, GstQuery * query );

 static gint do_read_request_response (GstMythtvSrc *src, guint64 offset, 

 		guint size, GstBuffer **outbuf);

 //static gboolean gst_mythtv_src_sink_activate_pull (GstPad * srcpad, gboolean active);

 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, GstBaseSrc,

     GST_TYPE_BASE_SRC, _urihandler_init)

 //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;

   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_URI,

      g_param_spec_string ("uri", "Uri",

        "The location in form of a URI (deprecated; use location)",

        "", G_PARAM_READWRITE));

   g_object_class_install_property

     (gobject_class, PROP_GMYTHTV_VERSION,

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

        "Change Myth TV 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 Myth TV 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 Myth TV 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));

 #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->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_transfer = NULL;

   this->unique_setup = FALSE;

   this->mythtv_version = GMYTHTV_VERSION_DEFAULT;

   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->mythtv_caps = NULL;

   this->update_prog_chain = FALSE;

   this->eos = FALSE;

   gst_base_src_set_format( GST_BASE_SRC( this ), GST_FORMAT_BYTES );  

   gst_base_src_set_live ( GST_BASE_SRC( this ), TRUE );

   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_query );

 */

 }

 static void

 gst_mythtv_src_finalize (GObject * gobject)

 {

   GstMythtvSrc *this = GST_MYTHTV_SRC (gobject);

   if (this->mythtv_caps) {

     gst_caps_unref (this->mythtv_caps);

     this->mythtv_caps = NULL;

   }

   if (this->file_transfer) {

     g_object_unref (this->file_transfer);

     this->file_transfer = NULL;

   }

 	if (this->spawn_livetv) {

     //g_object_unref (this->spawn_livetv);

     this->spawn_livetv = NULL;

   }

   if (this->uri_name) {

     g_free (this->uri_name);

   }

   if (this->user_agent) {

     g_free (this->user_agent);

   }

   G_OBJECT_CLASS (parent_class)->finalize (gobject);

 }

 static gint

 do_read_request_response (GstMythtvSrc * src, guint64 offset, guint size, GstBuffer **outbuf)

 {

   gint read = 0;

   guint sizetoread = size;

   g_print( "Starting: [%s] Reading %d bytes...\n", __FUNCTION__, sizetoread ); 

   /* Loop sending the Myth File Transfer request:

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

   gint len = 0;

   GST_OBJECT_LOCK(src);

   while ( sizetoread > 0 ) {

     len = gmyth_file_transfer_read( src->file_transfer,

 	GST_BUFFER_DATA( *outbuf ) + read, sizetoread, TRUE );

     if ( len > 0 ) {

       read += len;      

       sizetoread -= len;

     } 

     else if ( len <= 0 ) 

     {

       if ( src->live_tv == FALSE ) 

       {

 	goto eos;

       } 

       else  

       {

 	if ( len == GMYTHTV_FILE_TRANSFER_READ_ERROR ) { /* -314 */

 	  src->update_prog_chain = TRUE;

 	  if ( gst_mythtv_src_next_program_chain ( src ) )

 	    continue;

 	  else

 	    goto eos;	  	

 	} else 

 	  if ( abs( src->content_size - src->prev_content_size ) < GMYTHTV_TRANSFER_MAX_BUFFER )  {

 	    src->update_prog_chain = TRUE;

 	    if ( src->enable_timing_position ) {

 	      gint64 size_tmp = 0;

 	      if (src->live_tv == TRUE) {

 get_file_pos:

 		size_tmp = gmyth_file_transfer_get_file_position( src->file_transfer );

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

 		  src->content_size = size_tmp;

 		else if ( size_tmp > 0 )

 		  goto get_file_pos;

 		g_print( "\t[%s]\tGET_POSITION: file_position = %lld\n",

 		    __FUNCTION__, size_tmp );

 	      }

 	    } else if ( abs( src->content_size - src->prev_content_size ) < GMYTHTV_TRANSFER_MAX_BUFFER ) {

 	      src->prev_content_size = src->content_size;

 	      gint64 new_offset = gmyth_file_transfer_get_file_position( src->file_transfer );

 	      if ( new_offset > 0 ) {

 		if ( src->content_size < new_offset ) {

 		  src->content_size = new_offset;

 		}

 	      } else {

 		src->update_prog_chain = TRUE;

 	      }

 	    }

 	    goto done;

 	  }

 	  goto done;

       }

     }

     if ( read == sizetoread )

       break;

   }

   if ( read > 0 ) {

     src->read_offset += read;

     src->bytes_read += read;

     g_print( "[%s]\tBYTES READ (actual) = %d, BYTES READ (cumulative) = %llu, "\

 	"OFFSET = %llu, CONTENT SIZE = %llu.\n", __FUNCTION__, read, src->bytes_read, 

 	src->read_offset, src->content_size );

     GST_BUFFER_SIZE (*outbuf) = read; //GST_BUFFER_SIZE (buffer) = read;

     GST_BUFFER_OFFSET (*outbuf) = offset; //GST_BUFFER_OFFSET (buffer) = offset;

     GST_BUFFER_OFFSET_END (*outbuf) = offset + read;//GST_BUFFER_OFFSET_END (buffer) = offset + read;

     g_print( "Got buffer: [%s]\t\tBUFFER --->SIZE = %d, OFFSET = %llu, "\

 	"OFFSET_END = %llu.\n\n", __FUNCTION__, GST_BUFFER_SIZE (*outbuf), 

 	GST_BUFFER_OFFSET (*outbuf), GST_BUFFER_OFFSET_END (*outbuf) );

   } else if ( !src->live_tv )

     goto eos;

   goto done;

 eos:

   src->eos = TRUE;

 done:

   GST_OBJECT_UNLOCK(src);

   return read;

 }

 static GstFlowReturn

 gst_mythtv_src_create ( GstBaseSrc * psrc, guint64 offset, guint size, GstBuffer **outbuf)

 {

   GstMythtvSrc *src;

   GstFlowReturn ret = GST_FLOW_OK;

   gint read = -1;

   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;

   if ( G_UNLIKELY (src->update_prog_chain) )

     goto change_progchain;

   GST_OBJECT_LOCK(src);

   if (G_UNLIKELY (src->read_offset != offset)) {

     gint64 new_offset = gmyth_file_transfer_seek(src->file_transfer, offset - src->content_size_last, SEEK_SET);

     g_print( "[%s] SRC Offset = %lld, NEW actual backend SEEK Offset = %lld.\n",

     	__FUNCTION__, src->read_offset, new_offset );

     if (G_UNLIKELY (new_offset < 0 ) )//|| new_offset != src->read_offset)) {

     {

       GST_OBJECT_UNLOCK(src);

       if ( src->live_tv )

       	goto change_progchain;

       else

       	goto eos;

     }

     src->read_offset = offset;

   }

   GST_OBJECT_UNLOCK(src);

   /* Create the buffer. */

   ret = gst_pad_alloc_buffer (GST_BASE_SRC_PAD (GST_BASE_SRC (psrc)),

       src->read_offset, size,

       //src->icy_caps ? src->icy_caps :

       GST_PAD_CAPS (GST_BASE_SRC_PAD (GST_BASE_SRC (psrc))), outbuf);

   if (G_UNLIKELY (ret != GST_FLOW_OK))

     goto done;

   read = do_read_request_response ( src, src->read_offset, size, outbuf );

   if (G_UNLIKELY (src->update_prog_chain) )

     goto change_progchain;

   if (G_UNLIKELY (read <= 0) || *outbuf == NULL) {

   	if ( src->live_tv )

     	goto change_progchain;

     else

     	goto read_error;

   }

 done:

  {

     const gchar *reason = gst_flow_get_name (ret);

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

   	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));

 		// go to the next program chain

 		src->unique_setup = FALSE;

 		src->update_prog_chain = TRUE;

 		//gst_mythtv_src_next_program_chain( src );  

     return -101;

   }

 }

 void

 update_size_func( void *mythtv_data ) 

 {

   GstMythtvSrc *src;

   g_return_if_fail( mythtv_data != NULL );

   src = GST_MYTHTV_SRC ( mythtv_data );

   g_static_mutex_lock( &update_size_mutex );

   if ( src->do_start ) {

     if ( src->enable_timing_position ) {

       gint64 size_tmp = 0;

       if (src->live_tv == TRUE) {

 get_file_pos:

 	g_usleep( 50 );

 	size_tmp = gmyth_file_transfer_get_file_position( src->file_transfer );

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

 	  src->content_size = size_tmp;

 	else if ( size_tmp > 0 )

 	  goto get_file_pos;

 	g_print( "\t[%s]\tGET_POSITION: file_position = %lld\n",

 	    __FUNCTION__, size_tmp );

       }

     }

   }

   g_static_mutex_unlock( &update_size_mutex );

 }

 gint64

 gst_mythtv_src_get_position ( GstMythtvSrc* src ) 

 {

   gint64 size_tmp = 0;

   guint max_tries = 3;

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

 	GMYTHTV_TRANSFER_MAX_BUFFER ) ) {

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

     src->prev_content_size = src->content_size;

 get_file_pos:

     g_usleep( 10 );

     size_tmp = gmyth_file_transfer_get_file_position( src->file_transfer );

     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;

     g_print( "\t[%s]\tGET_POSITION: file_position = %lld\n",

 	__FUNCTION__, size_tmp );

   }

   return src->content_size;	

 }

 /* 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;

   gboolean ret = TRUE;

   if ( !src->do_start )

   	goto done;

   if (src->unique_setup == FALSE) {

     src->unique_setup = TRUE;

   } else {

     goto done;

   }

   GST_OBJECT_LOCK(src);

   if ( src->live_tv ) {

     src->spawn_livetv = gmyth_livetv_new( );

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

       ret = FALSE;

       GST_OBJECT_UNLOCK( src );

       goto init_failed;

     }

     /* set up the uri variable */

     src->uri_name = g_strdup( src->spawn_livetv->proginfo->pathname->str );

     chain_id_local = gmyth_tvchain_get_id( src->spawn_livetv->tvchain );

     if ( chain_id_local != NULL ) {

       src->live_chain_id = g_strdup( chain_id_local->str );

       g_print( "\t[%s]\tLocal chain ID = %s.\n", __FUNCTION__, src->live_chain_id );

     }

     src->live_tv_id = src->spawn_livetv->remote_encoder->recorder_num;

     g_print ( "[%s] LiveTV id = %d, URI path = %s.\n", __FUNCTION__, src->live_tv_id, src->uri_name );

   }

   src->file_transfer = gmyth_file_transfer_new( src->live_tv_id, 

       g_string_new( src->uri_name ), -1, src->mythtv_version );

   if ( src->file_transfer == NULL ) {

     GST_OBJECT_UNLOCK(src);

     goto init_failed;

   }

   /* sets the Playback monitor connection */

   ret = gmyth_file_transfer_playback_setup( &(src->file_transfer), src->live_tv );

   if ( src->live_tv == TRUE && ret == TRUE ) {

     /* loop finished, set the max tries variable to zero again... */

     wait_to_transfer = 0;

     while ( wait_to_transfer++ < GMYTHTV_TRANSFER_MAX_WAITS && ( gmyth_file_transfer_is_recording( src->file_transfer ) == FALSE 

 	  /*|| ( gmyth_file_transfer_get_file_position( src->file_transfer ) < ( src->content_size + 327680 ) )*/ ) )

       g_usleep( 100 );

   }

   /* sets the FileTransfer instance connection (video/audio download) */

   ret = gmyth_file_transfer_setup( &(src->file_transfer), src->live_tv );

   if ( ret == FALSE ) {

     GST_OBJECT_UNLOCK(src);

 #ifndef GST_DISABLE_GST_DEBUG  

     if ( src->mythtv_msgs_dbg )

       g_printerr( "MythTV FileTransfer request failed when setting up socket connection!\n" );  	  

 #endif

     goto begin_req_failed;

   }

   src->content_size = src->file_transfer->filesize;

   GST_OBJECT_UNLOCK(src);

   src->do_start = FALSE;

 done:

   return TRUE;

   /* ERRORS */

 init_failed:

   {

     if (src->spawn_livetv != NULL )

       g_object_unref( src->spawn_livetv );

     GST_ELEMENT_ERROR (src, LIBRARY, INIT,

 	(NULL), ("Could not initialize MythTV library (%i, %s)", ret, src->uri_name));

     return FALSE;

   }

 begin_req_failed:

   {

     GST_ELEMENT_ERROR (src, LIBRARY, INIT,

 	(NULL), ("Could not begin request sent to MythTV server (%i, %s)", ret, src->uri_name));

     return FALSE;

   }

 }

 /* create a new socket for connecting to the next program chain */

 static gboolean

 gst_mythtv_src_next_program_chain ( GstMythtvSrc *src )

 {

   GString *chain_id_local = NULL;

   gboolean ret = TRUE;

   if ( !src->live_tv )

     goto init_failed;

   src->update_prog_chain = FALSE;

   if (src->file_transfer) {

     g_object_unref (src->file_transfer);

     src->file_transfer = NULL;

   }

   if (src->uri_name) {

     g_free (src->uri_name);

   }

   if ( src->live_tv ) {

     if ( gmyth_livetv_next_program_chain( src->spawn_livetv ) == FALSE ) {

       ret = FALSE;

       goto init_failed;

     }

     /* set up the uri variable */

     src->uri_name = g_strdup( src->spawn_livetv->proginfo->pathname->str );

     chain_id_local = gmyth_tvchain_get_id( src->spawn_livetv->tvchain );

     if ( chain_id_local != NULL ) {

       src->live_chain_id = g_strdup( chain_id_local->str );

       g_print( "\t[%s]\tLocal chain ID = %s.\n", __FUNCTION__, src->live_chain_id );

     }

     src->live_tv_id = src->spawn_livetv->remote_encoder->recorder_num;

     g_print ( "[%s] LiveTV id = %d, URI path = %s.\n", __FUNCTION__, src->live_tv_id, src->uri_name );

   }

   src->file_transfer = gmyth_file_transfer_new( src->live_tv_id, 

       g_string_new( src->uri_name ), -1, src->mythtv_version );

   if ( src->file_transfer == NULL ) {

     goto init_failed;

   }

   /* sets the Playback monitor connection */

   ret = gmyth_file_transfer_playback_setup( &(src->file_transfer), src->live_tv );

   if ( src->live_tv == TRUE && ret == TRUE ) {

     /* loop finished, set the max tries variable to zero again... */

     wait_to_transfer = 0;

     g_usleep( 200 );

     while ( wait_to_transfer++ < GMYTHTV_TRANSFER_MAX_WAITS && 

 	( gmyth_file_transfer_is_recording( src->file_transfer ) == FALSE ) )

       g_usleep( 1000 );

   }

   /* sets the FileTransfer instance connection (video/audio download) */

   ret = gmyth_file_transfer_setup( &(src->file_transfer), src->live_tv );

   if ( ret == FALSE ) {

 #ifndef GST_DISABLE_GST_DEBUG  

     if ( src->mythtv_msgs_dbg )

       g_printerr( "MythTV FileTransfer request failed when setting up socket connection!\n" );  	  

 #endif

     goto begin_req_failed;

   }

   src->content_size_last = src->content_size;

 #if 0

   if ( src->content_size < src->file_transfer->filesize ) {

     src->content_size = src->file_transfer->filesize;

   } else {

     //gint64 pos = gst_mythtv_src_get_position(src);

     //if ( pos > src->file_transfer->filesize )

     //	src->content_size = pos;  	

   }

 #endif

   src->content_size = src->file_transfer->filesize;

   while (  src->content_size < GMYTHTV_TRANSFER_MAX_BUFFER )

     src->content_size = gst_mythtv_src_get_position( src );

   //src->read_offset = 0;

   //src->update_prog_chain = FALSE;

   return TRUE;

   /* ERRORS */

 init_failed:

   {

     if (src->spawn_livetv != NULL )

       g_object_unref( src->spawn_livetv );

     GST_ELEMENT_ERROR (src, LIBRARY, INIT,

 	(NULL), ("Could not initialize MythTV library (%i, %s)", ret, src->uri_name));

     return FALSE;

   }

 begin_req_failed:

   {

     GST_ELEMENT_ERROR (src, LIBRARY, INIT,

 	(NULL), ("Could not begin request sent to MythTV server (%i, %s)", ret, src->uri_name));

     return FALSE;

   }

 }

 #if 0

 /* handles queries for location in the stream in the requested format */

 static gboolean

 gst_mythtv_src_query ( GstPad * pad, GstQuery * query )

 {

   gboolean res = TRUE;

   GstMythtvSrc *mythtv;

   guint64 size = 0;

   mythtv = GST_GMYTHTV_SRC( GST_PAD_PARENT (pad) );

   size = gst_mythtv_src_get_position (mythtv);

   switch (GST_QUERY_TYPE (query)) {

     case GST_QUERY_POSITION:

       {

 	//GstFormat format;

 	gint64 cur = 0;

 	/* save requested format */

 	gst_query_parse_position (query, NULL, &cur);

 	/* query peer for current position in time */

 	g_print( "[%s] Actual size is %s than current size from sink. [ %lld, %lld ]\n", __FUNCTION__, 

 	    ( size > cur ) ? "greater" : "lower", size, cur );

 	gst_query_set_position (query, GST_FORMAT_BYTES, size);

 	if ( size < cur )

 	  goto error;

 	break;

       }

      #if 0

     case GST_QUERY_DURATION:

       {

 	//GstFormat format;

 	gint64 cur = 0;

 	/* save requested format */

 	gst_query_parse_position (query, NULL, &cur);

 	/* query peer for current position in time */

 	g_print( "[%s] Actual size is %s than current size from sink. [ %lld, %lld ]\n", __FUNCTION__, 

 	    ( size * GST_SECOND > cur * GST_SECOND ) ? "greater" : "lower", size * GST_SECOND, 

 	    cur * GST_SECOND );

 	gst_query_set_position (query, GST_FORMAT_TIME, size * GST_SECOND );

 	if ( size * GST_SECOND < cur * GST_SECOND )

 	  goto error;

 	break;

       }

 	#endif

     default:

       res = FALSE;

       break;

   }

   return res;

 error:

   return FALSE;

 }

 #endif

 static gboolean

 gst_mythtv_src_get_size (GstBaseSrc * bsrc, guint64 * size)

 {

   GstMythtvSrc *src = GST_MYTHTV_SRC (bsrc);

   gboolean ret = TRUE;

   g_print( "[%s] Difference from previous content size: %d (max.: %d)\n", __FUNCTION__, 

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

   if (src->content_size <= 0) {

     ret= FALSE;

   } else if ( src->live_tv && ( abs( src->content_size - src->bytes_read ) < 

 	GMYTHTV_TRANSFER_MAX_BUFFER ) ) {

     //g_static_mutex_lock( &update_size_mutex );

     //GST_OBJECT_LOCK(src);

     src->prev_content_size = src->content_size;

     gint64 new_offset = gmyth_file_transfer_get_file_position( src->file_transfer );

     if ( new_offset > 0 ) {

       if ( src->content_size < new_offset ) {

 	src->content_size = new_offset;

       }

     } else {

       if ( src->live_tv )

 	src->update_prog_chain = TRUE;

     }

     if ( src->enable_timing_position ) {

       gint64 size_tmp = 0;

       if (src->live_tv == TRUE) {

 get_file_pos:

 	g_usleep( 5 );

 	size_tmp = gmyth_file_transfer_get_file_position( src->file_transfer );

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

 	  src->content_size = size_tmp;

 	else if ( size_tmp > 0  )

 	  goto get_file_pos;

 	g_print( "\t[%s]\tGET_POSITION: file_position = %lld\n",

 	    __FUNCTION__, size_tmp );

       }

     }

     //GST_OBJECT_UNLOCK(src);

     //g_static_mutex_unlock( &update_size_mutex );

   }

   *size = src->content_size;

   g_print( "[%s] Content size = %lld\n", __FUNCTION__, 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;

   src = GST_MYTHTV_SRC (bsrc);

   if (src->uri_name) {

     g_free (src->uri_name);

     src->uri_name = NULL;

   }

   if (src->mythtv_caps) {

     gst_caps_unref (src->mythtv_caps);

     src->mythtv_caps = NULL;

   }

   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;

   switch (GST_EVENT_TYPE (event)) {

 #if 0

     case GST_EVENT_FLUSH_START:

       //src->eos = FALSE;

       g_print( "\n\n\n[%s]\t\tGot FLUSH_START event!!!\n\n\n", __FUNCTION__ );

       cont_size = gst_mythtv_src_get_position (src);

       if ( !src->live_tv ) {

 	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 );

 	}

       } else {

 	if ( cont_size <= 0 ) {

 	  src->update_prog_chain = TRUE;

 	  src->eos = TRUE;

 	  src->unique_setup = FALSE;

 	  src->do_start = TRUE;		  				  		

 	}		  	

       }

       break;

     case GST_EVENT_FLUSH_STOP:

       src->do_start = TRUE;

       src->eos = FALSE;

       gst_element_set_state (GST_ELEMENT(src), GST_STATE_NULL);

       //gst_element_set_locked_state (GST_ELEMENT(src), TRUE);

       break;

 #endif

     case GST_EVENT_EOS:

       g_print( "[%s] Got EOS event!!!\n", __FUNCTION__ );

       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 );

 	}

       } else 

 	src->eos = TRUE;

       break;

 #if 0

     case GST_EVENT_NEWSEGMENT:

       g_print( "[%s] Got NEWSEGMENT!!!\n", __FUNCTION__ );

       src->eos = FALSE;

       break;

     case GST_EVENT_SEEK:  	  

       {

 	g_print( "[%s] Got EVENT_SEEK!!!\n", __FUNCTION__ );

 	gdouble rate;

 	//gboolean update = TRUE;

 	GstFormat format;

 	GstSeekType cur_type, stop_type;

 	GstSeekFlags flags;

 	gint64 cur = 0, stop = 0;

 	gst_event_parse_seek ( event, &rate, &format,

 	    &flags, &cur_type, &cur,

 	    &stop_type, &stop );

 	g_print( "[%s] Got EVENT_SEEK.\n", __FUNCTION__ );

 	if ( !( flags & GST_SEEK_FLAG_FLUSH ) ) {

 	  g_print( "[%s] Could get the FLAG_FLUSH message.\n", __FUNCTION__ );

 	}

 	//gboolean ret = gst_event_parse_new_segment ( event,

 	//    &update, &rate, &format, &start, &stop,

 	//    &position );

 	//GstFlowReturn flow_ret = gst_mythtv_src_create (GST_BASE_SRC( GST_PAD_PARENT( psrc ) ), 

 	//			cur, stop - cur + 1, GstBuffer)

       }

 #endif

     default:

       return gst_pad_event_default (pad, event);

   }

   return gst_pad_event_default (pad, event);

 }

 static gboolean

 gst_mythtv_src_is_seekable( GstBaseSrc *push_src )

 {

   return TRUE;

 }

 #if 0

 static gboolean

 gst_nuv_demux_sink_activate (GstPad * sinkpad)

 {

   gboolean res = TRUE;

   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));

   if (gst_pad_check_pull_range (sinkpad)) {

     nuv->mode = 0;

     nuv->adapter = NULL;

     res = gst_pad_activate_pull (sinkpad, TRUE);

   } else {

     nuv->mode = 1;

     nuv->adapter = gst_adapter_new ();

     res = gst_pad_activate_push (sinkpad, TRUE);

   }

   g_object_unref (nuv);

   return res;

 }

 static gboolean

 gst_nuv_demux_sink_activate_pull (GstPad * sinkpad, gboolean active)

 {

   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (sinkpad));

   if (active) {

     gst_pad_start_task (sinkpad, (GstTaskFunction) gst_nuv_demux_loop, sinkpad);

   } else {

     gst_pad_stop_task (sinkpad);

   }

   gst_object_unref (nuv);

   return TRUE;

 }

 static GstFlowReturn

 gst_nuv_demux_chain (GstPad * pad, GstBuffer * buf)

 {

   GstNuvDemux *nuv = GST_NUV_DEMUX (gst_pad_get_parent (pad));

   gst_adapter_push (nuv->adapter, buf);

   return gst_nuv_demux_play (pad);

 }

 static void

 gst_nuv_demux_loop (GstPad * pad)

 {

   gst_nuv_demux_play (pad);

 }

 #endif

 static GstStateChangeReturn

 gst_mythtv_src_change_state (GstElement * element, GstStateChange transition)

 {

   GstStateChangeReturn ret = GST_STATE_CHANGE_NO_PREROLL;

   GstMythtvSrc *src = GST_MYTHTV_SRC (element);

   switch (transition) {

     case GST_STATE_CHANGE_NULL_TO_READY:

       src->do_start = TRUE;

       src->unique_setup = FALSE;      

       break;

     case GST_STATE_CHANGE_READY_TO_PAUSED:

     case GST_STATE_CHANGE_PAUSED_TO_PLAYING:

       src->eos = FALSE;

       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:

       g_print( "[%s] READY to NULL called!\n", __FUNCTION__ );

       break;

     case GST_STATE_CHANGE_PLAYING_TO_PAUSED:

       g_print( "[%s] PLAYING to PAUSED called!\n", __FUNCTION__ );

       break;

     case GST_STATE_CHANGE_PAUSED_TO_READY:

       g_print( "[%s] PAUSED to READY called!\n", __FUNCTION__ );

       if ( src->live_tv && src->update_prog_chain ) {

 	src->read_offset = 0;

 	src->bytes_read = 0;

 	gst_mythtv_src_next_program_chain( src );

       }

       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_URI:

     case PROP_LOCATION:

       {

 	if (!g_value_get_string (value)) {

 	  GST_WARNING ("location property cannot be NULL");

 	  goto done;

 	}

 	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");

 	  goto done;

 	}

 	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;

       }

     default:

       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

       break;

   }

   GST_OBJECT_UNLOCK (mythtvsrc);

 done:

   return;

 }

   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_URI:

     case PROP_LOCATION:

       {

 	gchar *str = g_strdup( "" );

 	if ( mythtvsrc->uri_name == NULL ) {

 	  g_free (mythtvsrc->uri_name);

 	  mythtvsrc->uri_name = NULL;

 	} else {

 	  str = g_strdup( mythtvsrc->uri_name );

 	}

 	g_value_set_string ( value, str );

 	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:

       {

 	gchar *str = g_strdup( "" );

 	if ( mythtvsrc->live_chain_id == NULL ) {

 	  g_free (mythtvsrc->live_chain_id);

 	  mythtvsrc->live_chain_id = NULL;

 	} else {

 	  str = g_strdup( mythtvsrc->live_chain_id );

 	}

 	g_value_set_string ( value, str );

 	break;

       }

     default:

       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);

       break;

   }

   GST_OBJECT_UNLOCK (mythtvsrc);

 }

 /* entry point to initialize the plug-in

  * initialize the plug-in itself

  * register the element factories and pad templates

  * register the features

  */

 static gboolean

 plugin_init (GstPlugin * plugin)

 {

   return gst_element_register (plugin, "mythtvsrc", GST_RANK_NONE,

       GST_TYPE_MYTHTV_SRC);

 }

 /* this is the structure that gst-register looks for

  * so keep the name plugin_desc, or you cannot get your plug-in registered */

 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,

     GST_VERSION_MINOR,

     "mythtv",

     "lib MythTV src",

     plugin_init, VERSION, "LGPL", "GStreamer", "http://gstreamer.net/")

 /*** 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);

   //src->content_size = g_ascii_strtoull (value, NULL, 10);

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

 }