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libgnomevfs2-mythtv/modules/mythtv-method.c
author rosfran
Fri Feb 02 22:44:59 2007 +0000 (2007-02-02)
branchtrunk
changeset 323 6523ab923c00
parent 317 3b575d136efe
child 327 41995e0df2ba
permissions -rwxr-xr-x
[svn r325] Minor changes, separated process of opening LiveTV FileTransfer from the LiveTV setup. 
     1 /*

     2  * @author Hallyson Melo <hallyson.melo@indt.org.br>

     3  *

     4  * This program is free software; you can redistribute it and/or modify

     5  * it under the terms of the GNU Lesser General Public License as published by

     6  * the Free Software Foundation; either version 2 of the License, or

     7  * (at your option) any later version.

     8  *

     9  * This program is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    12  * GNU General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU Lesser General Public License

    15  * along with this program; if not, write to the Free Software

    16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    17  */

    18 

    19 #ifdef HAVE_CONFIG_H

    20 #include <config.h>

    21 #endif

    22 

    23 #include <string.h>

    24 #include <glib.h>

    25 #include <math.h>

    26 

    27 #include <libgnomevfs/gnome-vfs-module.h>

    28 #include <libgnomevfs/gnome-vfs-utils.h>

    29 

    30 #include <gmyth/gmyth_file_transfer.h>

    31 #include <gmyth/gmyth_livetv.h>

    32 #include <gmyth/gmyth_uri.h>

    33 #include <gmyth/gmyth_recorder.h>

    34 #include <gmyth/gmyth_backendinfo.h>

    35 #include <gmyth/gmyth_util.h>

    36 

    37 #define GST_MYTHTV_ID_NUM               1

    38 #define MYTHTV_VERSION_DEFAULT          30

    39 #define MYTHTV_TRANSFER_MAX_WAITS       100

    40 

    41 #define MYTHTV_BUFFER_SIZE		1024*64

    42 

    43 static GnomeVFSResult do_read (GnomeVFSMethod *method,

    44                                GnomeVFSMethodHandle *method_handle,

    45                                gpointer buffer,

    46                                GnomeVFSFileSize num_bytes,

    47                                GnomeVFSFileSize *bytes_read,

    48                                GnomeVFSContext *context);

    49 

    50 typedef struct {

    51     GMythFileTransfer *file_transfer;

    52     GMythLiveTV 			*livetv;

    53     gint 							channel_num;

    54     

    55     gint mythtv_version;

    56     gint64 content_size;

    57     guint64 bytes_read;

    58 

    59     GByteArray *buffer;

    60     gsize buffer_remain;

    61 } MythtvHandle;

    62 

    63 static GnomeVFSResult

    64 do_open (GnomeVFSMethod *method,

    65          GnomeVFSMethodHandle **method_handle,

    66          GnomeVFSURI *uri,

    67          GnomeVFSOpenMode mode,

    68          GnomeVFSContext *context)

    69 {

    70     MythtvHandle *myth_handle;

    71     GMythBackendInfo *backend_info;

    72     GMythURI *gmyth_uri = NULL;

    73     gboolean ret = TRUE;

    74     gboolean is_livetv = FALSE;

    75 

    76     _GNOME_VFS_METHOD_PARAM_CHECK (method_handle != NULL);

    77     _GNOME_VFS_METHOD_PARAM_CHECK (uri != NULL);

    78 

    79     myth_handle = g_new0 (MythtvHandle, 1);

    80 

    81     if (mode & GNOME_VFS_OPEN_WRITE) {

    82         return GNOME_VFS_ERROR_NOT_PERMITTED;

    83     }

    84 

    85     if (gnome_vfs_uri_get_host_name (uri) == NULL) {

    86     	return GNOME_VFS_ERROR_INVALID_HOST_NAME;

    87     }

    88 

    89     /* Initialize mythtv handler*/

    90     myth_handle->file_transfer = NULL;

    91     myth_handle->livetv = NULL;

    92     myth_handle->mythtv_version = MYTHTV_VERSION_DEFAULT;

    93     myth_handle->bytes_read = 0;

    94     myth_handle->content_size = 0;

    95 

    96     /* Creates and fills out the backend info structure */    

    97 	  backend_info = gmyth_backend_info_new_with_uri ( 

    98 	  			gnome_vfs_unescape_string( gnome_vfs_uri_to_string( uri, GNOME_VFS_URI_HIDE_NONE ), "" ) );

    99 	  

   100 	  /* creates an instance of  */  

   101 	  gmyth_uri = gmyth_uri_new_with_value( 

   102 	  		gnome_vfs_unescape_string( gnome_vfs_uri_to_string( uri, GNOME_VFS_URI_HIDE_NONE ), "" ) );

   103 

   104 	  is_livetv = gmyth_uri_is_livetv( gmyth_uri );

   105 

   106 	  /* Connect to the backend */	  

   107 	  if ( gmyth_uri != NULL && is_livetv == TRUE ) {

   108 	    myth_handle->livetv = gmyth_livetv_new ();

   109 	    

   110 	    myth_handle->channel_num = gmyth_uri_get_channel_num( gmyth_uri );

   111 	

   112 	    if ( myth_handle->channel_num != -1 ) {

   113 	      if (gmyth_livetv_channel_setup (myth_handle->livetv, myth_handle->channel_num,

   114 	              backend_info) == FALSE) {

   115 	        g_object_unref( gmyth_uri );

   116 	        ret = FALSE;

   117 	      }

   118 	    } else {

   119 	      if ( gmyth_livetv_setup (myth_handle->livetv, backend_info) == FALSE ) {

   120 	      	g_object_unref( gmyth_uri );

   121 	        ret = FALSE;

   122 	      }

   123 	    }

   124 	

   125 	    myth_handle->file_transfer = gmyth_livetv_create_file_transfer (myth_handle->livetv);

   126 	

   127 	    if (NULL == myth_handle->file_transfer) {

   128 	      ret = FALSE;

   129 	    }

   130 	    

   131   		if ( !gmyth_file_transfer_open( myth_handle->file_transfer, myth_handle->livetv->uri != NULL ? 

   132 								gmyth_uri_get_path(myth_handle->livetv->uri) : 

   133 								myth_handle->livetv->proginfo->pathname->str ) )

   134 			{

   135 				g_object_unref( myth_handle->file_transfer );

   136 				myth_handle->file_transfer = NULL;

   137 				ret = FALSE;

   138 			}

   139 	    

   140 	  } else {

   141 	

   142 	    myth_handle->file_transfer = gmyth_file_transfer_new (backend_info);

   143 	    

   144 	    /* Verifies if the file exists */

   145 	    if (!gmyth_util_file_exists (backend_info, gmyth_uri_get_path (gmyth_uri))) {

   146 	        g_object_unref (backend_info);

   147 					ret = FALSE;

   148 	    }

   149 	    

   150 	    /* sets the Playback monitor connection */

   151 	    ret = gmyth_file_transfer_open ( myth_handle->file_transfer, gmyth_uri_get_path (gmyth_uri) );

   152 		

   153 	  } /* if - LiveTV or not? */

   154 	  

   155     if (ret == FALSE) {

   156 	    g_warning ("MythTV FileTransfer open error.\n");

   157 	    return GNOME_VFS_ERROR_NOT_OPEN;

   158 	  }

   159 

   160     g_object_unref (backend_info);

   161     

   162 	  //if ( gmyth_uri != NULL )

   163 	  //	g_object_unref( gmyth_uri );

   164 	  

   165 	  g_return_val_if_fail (myth_handle->file_transfer != NULL, GNOME_VFS_ERROR_NOT_OPEN);

   166 	  

   167 	  if ( myth_handle->file_transfer->filesize < 0 && is_livetv )

   168 			myth_handle->content_size = gmyth_recorder_get_file_position( myth_handle->livetv->recorder );

   169 		else		

   170     	myth_handle->content_size = myth_handle->file_transfer->filesize;

   171     

   172     myth_handle->buffer = g_byte_array_sized_new (MYTHTV_BUFFER_SIZE);

   173     myth_handle->buffer_remain = 0;

   174 

   175     *method_handle = (GnomeVFSMethodHandle *) myth_handle;

   176 

   177     return GNOME_VFS_OK;

   178 }

   179 

   180 static GnomeVFSResult

   181 do_read (GnomeVFSMethod *method,

   182          GnomeVFSMethodHandle *method_handle,

   183          gpointer buffer,

   184          GnomeVFSFileSize num_bytes,

   185          GnomeVFSFileSize *bytes_read,

   186          GnomeVFSContext *context)

   187 {

   188     MythtvHandle *myth_handle = (MythtvHandle *) method_handle;

   189     GnomeVFSFileSize bytes_to_read;

   190 

   191     *bytes_read = 0;

   192 

   193     if (myth_handle->bytes_read >= myth_handle->content_size)

   194         return GNOME_VFS_ERROR_EOF;

   195 

   196     // fixme: change this to min math function

   197     if (num_bytes > myth_handle->content_size - myth_handle->bytes_read)

   198 	    bytes_to_read = myth_handle->content_size - myth_handle->bytes_read;

   199     else

   200 	    bytes_to_read = num_bytes;

   201 

   202     /* Loop sending the Myth File Transfer request:

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

   204     //if (myth_handle->buffer_remain  < MYTHTV_BUFFER_SIZE) {

   205     if ( bytes_to_read > myth_handle->buffer_remain ) {

   206         GByteArray *tmp_buffer = g_byte_array_new();

   207 

   208 	printf ("XXXXXXXXXXXXXX Pedindo %d %d\n", MYTHTV_BUFFER_SIZE, myth_handle->buffer_remain);

   209 

   210         gint len = gmyth_file_transfer_read (myth_handle->file_transfer,

   211               tmp_buffer, MYTHTV_BUFFER_SIZE - myth_handle->buffer_remain, TRUE);

   212 

   213 	if (len < 0) {

   214             g_byte_array_free (tmp_buffer, TRUE);

   215             g_warning ("Fail to read bytes");

   216 	    return GNOME_VFS_ERROR_IO;

   217         } /*else if (len == 0) {

   218 	    g_byte_array_free (tmp_buffer, TRUE);

   219 	    g_warning ("End of file probably achieved");

   220 	    return GNOME_VFS_ERROR_EOF;

   221 	}*/

   222 

   223         myth_handle->buffer = g_byte_array_append (myth_handle->buffer,

   224     		tmp_buffer->data, len);

   225 

   226 		myth_handle->buffer_remain += len;

   227 

   228         g_byte_array_free (tmp_buffer, TRUE);

   229     	tmp_buffer = NULL;    	

   230     }

   231     

   232     bytes_to_read = (bytes_to_read > myth_handle->buffer_remain) ? myth_handle->buffer_remain : bytes_to_read;

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

   234 

   235     g_memmove (buffer, myth_handle->buffer->data, bytes_to_read);

   236 

   237     myth_handle->bytes_read += bytes_to_read;

   238     myth_handle->buffer_remain -= bytes_to_read;    

   239 

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

   241   	myth_handle->buffer = g_byte_array_remove_range (myth_handle->buffer, 0, bytes_to_read);

   242     *bytes_read = bytes_to_read;

   243   

   244     return GNOME_VFS_OK;

   245 }

   246 

   247 static GnomeVFSResult

   248 do_close (GnomeVFSMethod *method,

   249           GnomeVFSMethodHandle *method_handle,

   250           GnomeVFSContext *context)

   251 {

   252 

   253     MythtvHandle *myth_handle = (MythtvHandle *) method_handle;

   254 

   255     if (myth_handle->file_transfer) {

   256 	    gmyth_file_transfer_close (myth_handle->file_transfer);

   257         g_object_unref (myth_handle->file_transfer);

   258     	myth_handle->file_transfer = NULL;

   259     }

   260     

   261     if (myth_handle->livetv) {

   262       g_object_unref (myth_handle->livetv);

   263     	myth_handle->livetv = NULL;

   264     }

   265     

   266     if (myth_handle->buffer) {

   267 		g_byte_array_free (myth_handle->buffer, TRUE);

   268 		myth_handle->buffer = NULL;

   269     }

   270 

   271     g_free (myth_handle);

   272 

   273     return GNOME_VFS_OK;

   274 }

   275 

   276 static GnomeVFSResult

   277 do_get_file_info (GnomeVFSMethod *method,

   278                   GnomeVFSURI *uri,

   279                   GnomeVFSFileInfo *file_info,

   280                   GnomeVFSFileInfoOptions options,

   281                   GnomeVFSContext *context)

   282 {

   283     GMythFileTransfer *file_transfer = NULL;

   284     GMythLiveTV 			*livetv 			 = NULL;

   285     GMythBackendInfo  *backend_info  = NULL;

   286     GMythURI					*gmyth_uri		 = NULL;

   287     gboolean 					is_livetv 		 = FALSE;

   288     gboolean					ret						 = TRUE;

   289     

   290     /* Creates and fills out the backend info structure */    

   291 	  backend_info = gmyth_backend_info_new_with_uri ( 

   292 	  			gnome_vfs_unescape_string( gnome_vfs_uri_to_string( uri, GNOME_VFS_URI_HIDE_NONE ), "" ) );

   293 	  

   294 	  /* creates an instance of */  

   295 	  gmyth_uri = gmyth_uri_new_with_value( 

   296 	  		gnome_vfs_unescape_string( gnome_vfs_uri_to_string( uri, GNOME_VFS_URI_HIDE_NONE ), "" ) );

   297 

   298 	  is_livetv = gmyth_uri_is_livetv( gmyth_uri );

   299 

   300     file_info->name = g_strdup (gmyth_uri_get_path (gmyth_uri)+1);

   301     file_info->valid_fields = file_info->valid_fields

   302         | GNOME_VFS_FILE_INFO_FIELDS_TYPE

   303         | GNOME_VFS_FILE_INFO_FIELDS_MIME_TYPE

   304         | GNOME_VFS_FILE_INFO_FIELDS_PERMISSIONS;

   305     file_info->type = GNOME_VFS_FILE_TYPE_REGULAR;

   306     /* fixme: get from file extension? */

   307     file_info->mime_type = g_strdup ("video/x-nuv");

   308     file_info->permissions =

   309         GNOME_VFS_PERM_USER_READ |

   310         GNOME_VFS_PERM_OTHER_READ |

   311         GNOME_VFS_PERM_GROUP_READ;

   312 

   313 	  /* Connect to the backend */

   314 	  if ( gmyth_uri != NULL && is_livetv == TRUE ) {

   315 	    livetv = gmyth_livetv_new ();

   316 	    

   317 	    gint channel_num = gmyth_uri_get_channel_num( gmyth_uri );

   318 	

   319 	    if ( channel_num != -1 ) {

   320 	      if (gmyth_livetv_channel_setup (livetv, channel_num,

   321 	              backend_info) == FALSE) {

   322 	        g_object_unref( gmyth_uri );

   323 	        ret = FALSE;

   324 	      }

   325 	    } else {

   326 	      if ( gmyth_livetv_setup (livetv, backend_info) == FALSE ) {

   327 	      	g_object_unref( gmyth_uri );

   328 	        ret = FALSE;

   329 	      }

   330 	    }

   331 	

   332 	    file_transfer = gmyth_livetv_create_file_transfer (livetv);

   333 	

   334 	    if (NULL == file_transfer) {

   335 	      ret = FALSE;

   336 	    }

   337 	    

   338 	  } else {

   339 	

   340 	    file_transfer = gmyth_file_transfer_new (backend_info);

   341 	    

   342 	    /* Verifies if the file exists */

   343 	    if (!gmyth_util_file_exists (backend_info, gmyth_uri_get_path (gmyth_uri))) {

   344 	        g_object_unref (backend_info);

   345 					return GNOME_VFS_ERROR_NOT_FOUND;

   346 	    }

   347 	    

   348 	    /* sets the Playback monitor connection */

   349 	    ret = gmyth_file_transfer_open ( file_transfer, gmyth_uri_get_path (gmyth_uri) );

   350 		

   351 	  } /* if - LiveTV or not? */

   352 	  

   353 	  /*	  

   354     if (ret == FALSE) {

   355 	    g_warning ("MythTV FileTransfer open error\n");

   356 	    return GNOME_VFS_ERROR_NOT_OPEN;

   357 	  }

   358 	  */

   359 	  if ( file_transfer->filesize < 0 && is_livetv )

   360 			file_info->size = gmyth_recorder_get_file_position( livetv->recorder );

   361 		else		

   362     	file_info->size = gmyth_file_transfer_get_filesize (file_transfer);

   363     

   364     file_info->block_count = GNOME_VFS_FILE_INFO_FIELDS_BLOCK_COUNT;

   365     file_info->io_block_size = GNOME_VFS_FILE_INFO_FIELDS_IO_BLOCK_SIZE;

   366     

   367     g_object_unref (file_transfer);

   368     g_object_unref (livetv);

   369     g_object_unref (backend_info);

   370 

   371     return GNOME_VFS_OK;

   372 }

   373 

   374 static gboolean

   375 do_is_local (GnomeVFSMethod *method,

   376              const GnomeVFSURI *uri)

   377 {

   378 	return FALSE;

   379 }

   380 

   381 static GnomeVFSMethod method = {

   382 	sizeof (GnomeVFSMethod),

   383 	do_open,

   384 	NULL,

   385 	do_close,

   386 	do_read,

   387 	NULL,

   388 	NULL,

   389 	NULL,

   390 	NULL,

   391 	NULL,

   392 	NULL,

   393 	NULL,

   394 	do_get_file_info,

   395 	NULL,

   396 	do_is_local,

   397 	NULL,

   398 	NULL,

   399 	NULL,

   400 	NULL,

   401 	NULL,

   402 	NULL,

   403 	NULL,

   404 	NULL,

   405 	NULL,

   406 	NULL,

   407 	NULL,

   408 	NULL,

   409 };

   410 

   411 

   412 GnomeVFSMethod *

   413 vfs_module_init (const char *method_name, const char *args)

   414 {

   415 	return &method;

   416 }

   417 

   418 void

   419 vfs_module_shutdown (GnomeVFSMethod *method)

   420 {

   421 }
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