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libgnomevfs2-mythtv/modules/mythtv-method.c
author rosfran
Mon Jan 29 23:35:37 2007 +0000 (2007-01-29)
branchtrunk
changeset 310 0638b71f9293
parent 299 a84d2982ff01
child 317 3b575d136efe
permissions -rwxr-xr-x
[svn r311] A lot of fixes regarding program info structure creation. 
     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 	  } else {

   132 	

   133 	    myth_handle->file_transfer = gmyth_file_transfer_new (backend_info);

   134 	    

   135 	    /* Verifies if the file exists */

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

   137 	        g_object_unref (backend_info);

   138 					return GNOME_VFS_ERROR_NOT_FOUND;

   139 	    }

   140 	    

   141 	    /* sets the Playback monitor connection */

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

   143 		

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

   145 	  

   146     if (ret == FALSE) {

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

   148 	    return GNOME_VFS_ERROR_NOT_OPEN;

   149 	  } 

   150 

   151     g_object_unref (backend_info);

   152     

   153 	  //if ( gmyth_uri != NULL )

   154 	  //	g_object_unref( gmyth_uri );

   155 	  

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

   157 

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

   159     

   160     myth_handle->buffer = g_byte_array_sized_new (MYTHTV_BUFFER_SIZE);

   161     myth_handle->buffer_remain = 0;

   162 

   163     *method_handle = (GnomeVFSMethodHandle *) myth_handle;

   164 

   165     return GNOME_VFS_OK;

   166 }

   167 

   168 static GnomeVFSResult

   169 do_read (GnomeVFSMethod *method,

   170          GnomeVFSMethodHandle *method_handle,

   171          gpointer buffer,

   172          GnomeVFSFileSize num_bytes,

   173          GnomeVFSFileSize *bytes_read,

   174          GnomeVFSContext *context)

   175 {

   176     MythtvHandle *myth_handle = (MythtvHandle *) method_handle;

   177     GnomeVFSFileSize bytes_to_read;

   178 

   179     *bytes_read = 0;

   180 

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

   182         return GNOME_VFS_ERROR_EOF;

   183 

   184     // fixme: change this to min math function

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

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

   187     else

   188 	    bytes_to_read = num_bytes;

   189 

   190     /* Loop sending the Myth File Transfer request:

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

   192     if ((myth_handle->buffer_remain = myth_handle->buffer->len) < MYTHTV_BUFFER_SIZE) {

   193     //if ( bytes_to_read > myth_handle->buffer_remain ) {

   194         GByteArray *tmp_buffer = g_byte_array_new();

   195 

   196         gint len = gmyth_file_transfer_read (myth_handle->file_transfer,

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

   198 

   199 	if (len < 0) {

   200             g_byte_array_free (tmp_buffer, TRUE);

   201             g_warning ("Fail to read bytes");

   202 	    return GNOME_VFS_ERROR_IO;

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

   204 	    g_byte_array_free (tmp_buffer, TRUE);

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

   206 	    return GNOME_VFS_ERROR_EOF;

   207 	}*/

   208 

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

   210     		tmp_buffer->data, len);

   211 

   212 		myth_handle->buffer_remain += len;

   213 

   214         g_byte_array_free (tmp_buffer, TRUE);

   215     	tmp_buffer = NULL;    	

   216     }

   217     

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

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

   220 

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

   222 

   223     myth_handle->bytes_read += bytes_to_read;

   224     myth_handle->buffer_remain -= bytes_to_read;    

   225 

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

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

   228     *bytes_read = bytes_to_read;

   229   

   230     return GNOME_VFS_OK;

   231 }

   232 

   233 static GnomeVFSResult

   234 do_close (GnomeVFSMethod *method,

   235           GnomeVFSMethodHandle *method_handle,

   236           GnomeVFSContext *context)

   237 {

   238 

   239     MythtvHandle *myth_handle = (MythtvHandle *) method_handle;

   240 

   241     if (myth_handle->file_transfer) {

   242 	    gmyth_file_transfer_close (myth_handle->file_transfer);

   243         g_object_unref (myth_handle->file_transfer);

   244     	myth_handle->file_transfer = NULL;

   245     }

   246     

   247     if (myth_handle->livetv) {

   248       g_object_unref (myth_handle->livetv);

   249     	myth_handle->livetv = NULL;

   250     }

   251     

   252     if (myth_handle->buffer) {

   253 		g_byte_array_free (myth_handle->buffer, TRUE);

   254 		myth_handle->buffer = NULL;

   255     }

   256 

   257     g_free (myth_handle);

   258 

   259     return GNOME_VFS_OK;

   260 }

   261 

   262 static GnomeVFSResult

   263 do_get_file_info (GnomeVFSMethod *method,

   264                   GnomeVFSURI *uri,

   265                   GnomeVFSFileInfo *file_info,

   266                   GnomeVFSFileInfoOptions options,

   267                   GnomeVFSContext *context)

   268 {

   269     GMythFileTransfer *file_transfer = NULL;

   270     GMythLiveTV 			*livetv 			 = NULL;

   271     GMythBackendInfo  *backend_info  = NULL;

   272     GMythURI					*gmyth_uri		 = NULL;

   273     gboolean 					is_livetv 		 = FALSE;

   274     gboolean					ret						 = TRUE;

   275     

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

   277 	  backend_info = gmyth_backend_info_new_with_uri ( 

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

   279 	  

   280 	  /* creates an instance of */  

   281 	  gmyth_uri = gmyth_uri_new_with_value( 

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

   283 

   284 	  is_livetv = gmyth_uri_is_livetv( gmyth_uri );

   285 

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

   287     file_info->valid_fields = file_info->valid_fields

   288         | GNOME_VFS_FILE_INFO_FIELDS_TYPE

   289         | GNOME_VFS_FILE_INFO_FIELDS_MIME_TYPE

   290         | GNOME_VFS_FILE_INFO_FIELDS_PERMISSIONS;

   291     file_info->type = GNOME_VFS_FILE_TYPE_REGULAR;

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

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

   294     file_info->permissions =

   295         GNOME_VFS_PERM_USER_READ |

   296         GNOME_VFS_PERM_OTHER_READ |

   297         GNOME_VFS_PERM_GROUP_READ;

   298 

   299 	  /* Connect to the backend */

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

   301 	    livetv = gmyth_livetv_new ();

   302 	    

   303 	    gint channel_num = gmyth_uri_get_channel_num( gmyth_uri );

   304 	

   305 	    if ( channel_num != -1 ) {

   306 	      if (gmyth_livetv_channel_setup (livetv, channel_num,

   307 	              backend_info) == FALSE) {

   308 	        g_object_unref( gmyth_uri );

   309 	        ret = FALSE;

   310 	      }

   311 	    } else {

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

   313 	      	g_object_unref( gmyth_uri );

   314 	        ret = FALSE;

   315 	      }

   316 	    }

   317 	

   318 	    file_transfer = gmyth_livetv_create_file_transfer (livetv);

   319 	

   320 	    if (NULL == file_transfer) {

   321 	      ret = FALSE;

   322 	    }

   323 	    

   324 	  } else {

   325 	

   326 	    file_transfer = gmyth_file_transfer_new (backend_info);

   327 	    

   328 	    /* Verifies if the file exists */

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

   330 	        g_object_unref (backend_info);

   331 					return GNOME_VFS_ERROR_NOT_FOUND;

   332 	    }

   333 	    

   334 	    /* sets the Playback monitor connection */

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

   336 		

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

   338 	  

   339 	  /*	  

   340     if (ret == FALSE) {

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

   342 	    return GNOME_VFS_ERROR_NOT_OPEN;

   343 	  }

   344 	  */

   345 

   346     file_info->size = gmyth_file_transfer_get_filesize (file_transfer);

   347     file_info->block_count = GNOME_VFS_FILE_INFO_FIELDS_BLOCK_COUNT;

   348     file_info->io_block_size = GNOME_VFS_FILE_INFO_FIELDS_IO_BLOCK_SIZE;

   349     

   350     g_object_unref (file_transfer);

   351     g_object_unref (livetv);

   352     g_object_unref (backend_info);

   353 

   354     return GNOME_VFS_OK;

   355 }

   356 

   357 static gboolean

   358 do_is_local (GnomeVFSMethod *method,

   359              const GnomeVFSURI *uri)

   360 {

   361 	return FALSE;

   362 }

   363 

   364 static GnomeVFSMethod method = {

   365 	sizeof (GnomeVFSMethod),

   366 	do_open,

   367 	NULL,

   368 	do_close,

   369 	do_read,

   370 	NULL,

   371 	NULL,

   372 	NULL,

   373 	NULL,

   374 	NULL,

   375 	NULL,

   376 	NULL,

   377 	do_get_file_info,

   378 	NULL,

   379 	do_is_local,

   380 	NULL,

   381 	NULL,

   382 	NULL,

   383 	NULL,

   384 	NULL,

   385 	NULL,

   386 	NULL,

   387 	NULL,

   388 	NULL,

   389 	NULL,

   390 	NULL,

   391 	NULL,

   392 };

   393 

   394 

   395 GnomeVFSMethod *

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

   397 {

   398 	return &method;

   399 }

   400 

   401 void

   402 vfs_module_shutdown (GnomeVFSMethod *method)

   403 {

   404 }
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