/* 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 <gmyth/gmyth_context.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_NUM			1000

#define GMYTHTV_VERSION_DEFAULT			30

#define GMYTHTV_TRANSFER_MAX_WAITS		100

#define GMYTHTV_TRANSFER_MAX_RESENDS	5

#define GMYTHTV_TRANSFER_MAX_BUFFER		128*1024

//( 32*1024  )

/* 4*1024 ??? */

#define MAX_READ_SIZE              		4*1024

//( 32*1024 )

#define GST_FLOW_ERROR_NO_DATA  			-101

#define INTERNAL_BUFFER_SIZE					40*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") );

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,

  PROP_GMYTHTV_CHANNEL_NUM

};

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 void gst_mythtv_src_get_times (GstBaseSrc * src, GstBuffer * buffer,

   GstClockTime * start, GstClockTime * end);

*/

static gboolean gst_mythtv_src_do_seek( GstBaseSrc *base, GstSegment *segment );

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_query (GstPad * pad, GstQuery * query);

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

static gint do_read_request_response (GstMythtvSrc * src, guint size, GByteArray *data_ptr);

GStaticRecMutex th_mutex = G_STATIC_REC_MUTEX_INIT;

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_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 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_int ("mythtv-channel", "mythtv-channel",

       "Change MythTV channel number",

       0, 99999, GST_GMYTHTV_CHANNEL_NUM, 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->get_times = gst_mythtv_src_get_times;

  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_transfer = 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->mythtv_caps = NULL;

  this->update_prog_chain = FALSE;

  this->channel_num = 0;

  this->eos = FALSE;

  this->bytes_queue = NULL;

  this->th_mutex = NULL;

  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_handle_query );

}

static void

gst_mythtv_src_finalize (GObject * gobject)

{

  GstMythtvSrc *this = GST_MYTHTV_SRC (gobject);

  if ( this->th_read_ahead != NULL ) {

    gst_task_stop( this->th_read_ahead );

    this->th_read_ahead = NULL;

  }

  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);

  }

  if ( this->bytes_queue ) {

    g_byte_array_free( this->bytes_queue, TRUE );

    this->bytes_queue = NULL;

  }

  G_OBJECT_CLASS (parent_class)->finalize (gobject);

}

static gint

do_read_request_response (GstMythtvSrc * src, guint size, GByteArray *data_ptr)

{

  gint read = 0;

  guint sizetoread = size;

  guint max_iters = GMYTHTV_TRANSFER_MAX_RESENDS;

  GST_LOG_OBJECT( src, "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;

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

    len = gmyth_file_transfer_read( src->file_transfer,

				data_ptr, sizetoread, TRUE );

    if ( len > 0 ) {

      read += len;

      sizetoread -= len;

    } 

    else if ( len < 0 )

    {

      read = -1;

      if ( src->live_tv == FALSE ) 

      {

	goto eos;

      } 

      else  

      {

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

	  src->update_prog_chain = TRUE;

	  goto done;	  	

	} 

	goto done;

      }

    }

    if ( read == sizetoread )

      goto done;

  }

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

    goto eos;

  goto done;

eos:

  src->eos = TRUE;

done:

  return read;

}

static GstFlowReturn

gst_mythtv_src_create ( GstPushSrc* psrc, 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;

  //g_static_rec_mutex_lock( &th_mutex );

  GST_DEBUG_OBJECT( src, "[%s] offset = %llu, size = %d...\n", __FUNCTION__, 

  		src->read_offset, MAX_READ_SIZE );

  GST_DEBUG_OBJECT ( src, "[%s]\t\tCreate: buffer_remain: %d\n", __FUNCTION__, 

      (gint) src->buffer_remain);

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

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

  	guint buffer_size_inter = INTERNAL_BUFFER_SIZE - src->buffer_remain;

  	GByteArray *buffer = g_byte_array_new();

    read = do_read_request_response( src, buffer_size_inter, buffer );

    if (G_UNLIKELY (read < 0)) {

      if ( src->live_tv )

	goto change_progchain;

      else

	goto read_error;

    }

    if ( G_UNLIKELY (src->update_prog_chain) )

      goto change_progchain;

    src->bytes_queue = g_byte_array_append( src->bytes_queue, g_memdup( buffer->data, read ), read );

    if ( read > buffer_size_inter )

    	GST_WARNING_OBJECT( src, "[%s] INCREASED buffer size! Backend sent more than we ask him... (%d)\n", 

    			__FUNCTION__, abs( read - buffer_size_inter ) );

    src->buffer_remain = src->buffer_remain + read;

    if ( buffer != NULL ) {

    	g_byte_array_free( buffer, TRUE );

    	buffer = NULL;    	

    }

    GST_DEBUG_OBJECT( src, "[%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 );

  }

  guint buffer_size = ( src->buffer_remain < MAX_READ_SIZE) ? src->buffer_remain : MAX_READ_SIZE;

  /* Create the buffer. */

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

      src->read_offset, buffer_size,

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

  if (G_UNLIKELY (ret != GST_FLOW_OK)) {

    if ( src->live_tv )

      goto change_progchain;

    else

      goto done;

  }

  /* gets the first buffer_size bytes from the byte array buffer variable */ 

  guint8 *buf = g_memdup( src->bytes_queue->data, buffer_size );

  GST_DEBUG_OBJECT( src, "[%s] read from network? %s!, buffer_remain = %d\n", __FUNCTION__, 

  	read == -1 ? "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) ), buf, 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, "[%s]\t\tBuffer output with size: %d\n", __FUNCTION__, 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 );

  GST_DEBUG_OBJECT( src, "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) );

  return ret;

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));

    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 ) );

    // go to the next program chain

    src->unique_setup = FALSE;

    src->update_prog_chain = TRUE;

    gst_mythtv_src_next_program_chain( src );

    return GST_FLOW_ERROR_NO_DATA;

  }

}

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

	__FUNCTION__, 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, "[%s]DO Seek called! (start = %lld, stop = %lld)\n", __FUNCTION__, 

  		segment->start, segment->stop );

  if ( segment->format == GST_FORMAT_TIME ) 

  {

    goto done; 

    //actual_seek = ( ( segment->start / 1000 ) * 28 ) * 4000;

  }

  GST_LOG_OBJECT( src, "[%s]Trying to seek at the value (actual_seek = %lld, read_offset = %lld)\n", __FUNCTION__, actual_seek, src->read_offset );

  /* verify if it needs to seek */

  if ( src->read_offset != actual_seek )

  {

    new_offset = gmyth_file_transfer_seek( src->file_transfer, segment->start, SEEK_SET );

    GST_LOG_OBJECT( src, "[%s] Segment offset start = %lld, SRC Offset = %lld, NEW actual backend SEEK Offset = %lld.\n",

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

    if ( G_UNLIKELY (new_offset < 0 ) )

    {

      ret = FALSE;

      if ( src->live_tv )

	goto change_progchain;

      else

	goto eos;

    }

    src->read_offset = new_offset;

    if ( ret == FALSE ) {

      GST_INFO_OBJECT( src, "[%s] Failed to set the SEEK on segment!\n", __FUNCTION__ );

    }

  }

done:

   return ret;

eos:

  {

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

    return FALSE;

  }

change_progchain:

  {

    GST_ELEMENT_ERROR (src, RESOURCE, READ,

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

		 src->uri_name));

    gst_pad_push_event ( GST_BASE_SRC_PAD (base),

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

    /* go to the next program chain */

    src->unique_setup = FALSE;

    src->update_prog_chain = TRUE;

    gst_mythtv_src_next_program_chain( src );

    return TRUE;

  }

}

/* 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 ( G_UNLIKELY (src->update_prog_chain) )

    goto change_progchain;

  if (src->unique_setup == FALSE) {

    src->unique_setup = TRUE;

  } else {

    goto done;

  }

  if ( src->live_tv ) {

  	//gmyth_context_initialize();

    src->spawn_livetv = gmyth_livetv_new( );

    if ( gmyth_livetv_setup( 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 );

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

    }

    if ( src->uri_name == NULL || strlen( src->uri_name ) <= 0 )

    	gmyth_context_initialize();

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

    GST_LOG_OBJECT( src, "[%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 );

	src->file_transfer = gmyth_file_transfer_new( );

  if ( src->file_transfer == NULL ) {

    goto init_failed;

  }

	ret = gmyth_file_transfer_open( src->file_transfer, g_string_new( src->uri_name ) );

  /* 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_livetv_is_recording( src->spawn_livetv ) == FALSE ) )

      g_usleep( 500 );

    /* IS_RECORDING again, just like the MythTV backend does... */

	  gmyth_livetv_is_recording( src->spawn_livetv );

	  sleep( 4 );  

  }

  /* 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 )

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

#endif

    goto begin_req_failed;

  }

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

  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:

  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;

  }

change_progchain:

  {

    GST_ELEMENT_ERROR (src, RESOURCE, READ,

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

		 src->uri_name));

    gst_pad_push_event ( GST_BASE_SRC_PAD (GST_BASE_SRC (src)),

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

    // go to the next program chain

    src->unique_setup = FALSE;

    src->update_prog_chain = TRUE;

    gst_mythtv_src_next_program_chain( src );

    return TRUE;

  }

}

/* 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;

  if (src->unique_setup == FALSE) {

    src->unique_setup = TRUE;

  } else {

    goto done;

  }

	GST_PAD_STREAM_LOCK( GST_BASE_SRC_PAD (GST_BASE_SRC (src)) );

  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 ) {

    	GST_INFO_OBJECT( src, "\n\n[%s]\t\tFailed to go to the next program chain!!!\n\n", __FUNCTION__ );

      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 );

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

    }

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

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

  }

  src->file_transfer = gmyth_file_transfer_new();

  if ( src->file_transfer == NULL ) {

    goto init_failed;

  }

	ret = gmyth_file_transfer_open( src->file_transfer, g_string_new( src->uri_name ) );

  /* 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_livetv_is_recording( src->spawn_livetv ) == 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 )

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

#endif

    goto begin_req_failed;

  }

  src->content_size_last = src->content_size;

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

  if ( src->live_tv ) {

  	wait_to_transfer = 0;

	  while ( wait_to_transfer++ < GMYTHTV_TRANSFER_MAX_WAITS && src->content_size < GMYTHTV_TRANSFER_MAX_BUFFER )

	    src->content_size = gst_mythtv_src_get_position( src );

  }

  src->read_offset = 0;  

  if ( src->bytes_queue != NULL ) {

  	g_byte_array_free( src->bytes_queue, TRUE );

  }

  src->bytes_queue = g_byte_array_sized_new( INTERNAL_BUFFER_SIZE );

  //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:

	src->update_prog_chain = FALSE;

	GST_PAD_STREAM_UNLOCK( GST_BASE_SRC_PAD (GST_BASE_SRC (src)) );

  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;

  }

}

static gboolean

gst_mythtv_src_get_size (GstBaseSrc * bsrc, guint64 * size)

{

  GstMythtvSrc *src = GST_MYTHTV_SRC (bsrc);

  gboolean ret = TRUE;

  GST_LOG_OBJECT( src, "[%s] Differs from previous content size: %d (max.: %d)\n", __FUNCTION__, 

  			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, "[%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;

  gboolean ret = FALSE;

  switch (GST_EVENT_TYPE (event)) {

    case GST_EVENT_EOS:

      GST_WARNING_OBJECT( src, "[%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 );

	}

      }

      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:

    {

    	gint64 pos = -1;

      gst_query_parse_position (query, &formt, &pos );

      res = TRUE;

      if ( formt == GST_FORMAT_BYTES )

      	GST_DEBUG_OBJECT (myth, "POS %lld (BYTES).\n", pos );

      else if ( formt == GST_FORMAT_TIME )

      	GST_DEBUG_OBJECT (myth, "POS %lld (TIME).\n", pos );

      break;

    }

    case GST_QUERY_DURATION:

    {

#if 0

      if (myth->duration != 0) {

	gint64 total;

	gint64 fps;

	fps = nuv->h->i_fpsn / nuv->h->i_fpsd;

	total = gst_util_uint64_scale_int (GST_SECOND, nuv->h->i_video_blocks, fps);

      }

#endif