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libgnomevfs2-mythtv/modules/mythtv-method.c
author rosfran
Tue Jan 23 21:37:27 2007 +0000 (2007-01-23)
branchtrunk
changeset 291 73fa3a0f2f08
parent 281 08c4bc759e7a
child 294 388fc8b452c2
permissions -rwxr-xr-x
[svn r292] GObject format to the GMythProgramInfo, new actions such as GET_PROGRAM_INFO and GET_CURRENT_RECORDER. 
     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     guint64 content_size;

    57     guint64 bytes_read;

    58 

    59     GByteArray *buffer;

    60     gsize buffer_remain;

    61 } MythtvHandle;

    62 

    63 

    64 

    65 static GnomeVFSResult

    66 do_open (GnomeVFSMethod *method,

    67          GnomeVFSMethodHandle **method_handle,

    68          GnomeVFSURI *uri,

    69          GnomeVFSOpenMode mode,

    70          GnomeVFSContext *context)

    71 {

    72     MythtvHandle *myth_handle;

    73     GMythBackendInfo *backend_info;

    74     GMythURI *gmyth_uri = NULL;

    75     gboolean ret = TRUE;

    76     gboolean is_livetv = FALSE;

    77     gint wait_to_transfer = 0;

    78 

    79     _GNOME_VFS_METHOD_PARAM_CHECK (method_handle != NULL);

    80     _GNOME_VFS_METHOD_PARAM_CHECK (uri != NULL);

    81 

    82     myth_handle = g_new0 (MythtvHandle, 1);

    83 

    84     if (mode & GNOME_VFS_OPEN_WRITE) {

    85         return GNOME_VFS_ERROR_NOT_PERMITTED;

    86     }

    87 

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

    89     	return GNOME_VFS_ERROR_INVALID_HOST_NAME;

    90     }

    91 

    92     /* Initialize mythtv handler*/

    93     myth_handle->file_transfer = NULL;

    94     myth_handle->livetv = NULL;

    95     myth_handle->mythtv_version = MYTHTV_VERSION_DEFAULT;

    96     myth_handle->bytes_read = 0;

    97     myth_handle->content_size = -1;

    98 

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

   100 	  backend_info = gmyth_backend_info_new_with_uri ( 

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

   102 	  

   103 	  /* creates an instance of  */  

   104 	  gmyth_uri = gmyth_uri_new_with_value( 

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

   106 	  

   107 	  /* Connect to the backend */	  

   108 	  if ( gmyth_uri != NULL && ( is_livetv = gmyth_uri_is_livetv( gmyth_uri ) ) == TRUE ) {

   109 	    myth_handle->livetv = gmyth_livetv_new ();

   110 	    

   111 	    myth_handle->channel_num = gmyth_uri_get_channel_num( gmyth_uri );

   112 	

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

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

   115 	              backend_info) == FALSE) {

   116 	        g_object_unref( gmyth_uri );

   117 	        ret = FALSE;

   118 	      }

   119 	    } else {

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

   121 	      	g_object_unref( gmyth_uri );

   122 	        ret = FALSE;

   123 	      }

   124 	    }

   125 	

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

   127 	

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

   129 	      ret = FALSE;

   130 	    }

   131 	    

   132 	    if ( gmyth_uri != NULL )

   133 	    	g_object_unref( gmyth_uri );

   134 	    	

   135 	  } else {

   136 	

   137 	    myth_handle->file_transfer = gmyth_file_transfer_new (backend_info);

   138 	    

   139 	    /* Verifies if the file exists */

   140 	    if (!gmyth_util_file_exists (backend_info, gnome_vfs_uri_get_path (uri))) {

   141 	        g_object_unref (backend_info);

   142 					return GNOME_VFS_ERROR_NOT_FOUND;

   143 	    }

   144 	    

   145 	    /* sets the Playback monitor connection */

   146 	    ret = gmyth_file_transfer_open ( myth_handle->file_transfer, gnome_vfs_uri_get_path (uri) );

   147 		

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

   149 	  

   150     if (ret == FALSE) {

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

   152 	    return GNOME_VFS_ERROR_NOT_OPEN;

   153 	  } 

   154 

   155     g_object_unref (backend_info);

   156 

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

   158 

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

   160     

   161     myth_handle->buffer = g_byte_array_sized_new (MYTHTV_BUFFER_SIZE);

   162     myth_handle->buffer_remain = 0;

   163 

   164     *method_handle = (GnomeVFSMethodHandle *) myth_handle;

   165 

   166     return GNOME_VFS_OK;

   167 }

   168 

   169 static GnomeVFSResult

   170 do_read (GnomeVFSMethod *method,

   171          GnomeVFSMethodHandle *method_handle,

   172          gpointer buffer,

   173          GnomeVFSFileSize num_bytes,

   174          GnomeVFSFileSize *bytes_read,

   175          GnomeVFSContext *context)

   176 {

   177     MythtvHandle *myth_handle = (MythtvHandle *) method_handle;

   178     GnomeVFSFileSize bytes_to_read;

   179 

   180     *bytes_read = 0;

   181 

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

   183         return GNOME_VFS_ERROR_EOF;

   184 

   185     // fixme: change this to min math function

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

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

   188     else

   189 	    bytes_to_read = num_bytes;

   190 

   191     /* Loop sending the Myth File Transfer request:

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

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

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

   195         GByteArray *tmp_buffer = g_byte_array_new();

   196 

   197         gint len = gmyth_file_transfer_read (myth_handle->file_transfer,

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

   199 

   200 	if (len < 0) {

   201             g_byte_array_free (tmp_buffer, TRUE);

   202             g_warning ("Fail to read bytes");

   203 	    return GNOME_VFS_ERROR_IO;

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

   205 	    g_byte_array_free (tmp_buffer, TRUE);

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

   207 	    return GNOME_VFS_ERROR_EOF;

   208 	}*/

   209 

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

   211     		tmp_buffer->data, len);

   212 

   213 		myth_handle->buffer_remain += len;

   214 

   215         g_byte_array_free (tmp_buffer, TRUE);

   216     	tmp_buffer = NULL;    	

   217     }

   218     

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

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

   221 

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

   223 

   224     myth_handle->bytes_read += bytes_to_read;

   225     myth_handle->buffer_remain -= bytes_to_read;    

   226 

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

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

   229     *bytes_read = bytes_to_read;

   230   

   231     return GNOME_VFS_OK;

   232 }

   233 

   234 static GnomeVFSResult

   235 do_close (GnomeVFSMethod *method,

   236           GnomeVFSMethodHandle *method_handle,

   237           GnomeVFSContext *context)

   238 {

   239 

   240     MythtvHandle *myth_handle = (MythtvHandle *) method_handle;

   241 

   242     if (myth_handle->file_transfer) {

   243 	    gmyth_file_transfer_close (myth_handle->file_transfer);

   244         g_object_unref (myth_handle->file_transfer);

   245     	myth_handle->file_transfer = NULL;

   246     }

   247     

   248     if (myth_handle->livetv) {

   249       g_object_unref (myth_handle->livetv);

   250     	myth_handle->livetv = NULL;

   251     }

   252     

   253     if (myth_handle->buffer) {

   254 		g_byte_array_free (myth_handle->buffer, TRUE);

   255 		myth_handle->buffer = NULL;

   256     }

   257 

   258     g_free (myth_handle);

   259 

   260     return GNOME_VFS_OK;

   261 }

   262 

   263 static GnomeVFSResult

   264 do_get_file_info (GnomeVFSMethod *method,

   265                   GnomeVFSURI *uri,

   266                   GnomeVFSFileInfo *file_info,

   267                   GnomeVFSFileInfoOptions options,

   268                   GnomeVFSContext *context)

   269 {

   270     GMythFileTransfer *file_transfer = NULL;

   271     GMythBackendInfo *backend_info = NULL;

   272 

   273     file_info->name = g_strdup (gnome_vfs_uri_get_path (uri));

   274     file_info->valid_fields = file_info->valid_fields

   275         | GNOME_VFS_FILE_INFO_FIELDS_TYPE

   276         | GNOME_VFS_FILE_INFO_FIELDS_MIME_TYPE

   277         | GNOME_VFS_FILE_INFO_FIELDS_PERMISSIONS;

   278     file_info->type = GNOME_VFS_FILE_TYPE_REGULAR;

   279     // fixme: get from file extension?

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

   281     file_info->permissions =

   282         GNOME_VFS_PERM_USER_READ |

   283         GNOME_VFS_PERM_OTHER_READ |

   284         GNOME_VFS_PERM_GROUP_READ;

   285 

   286     backend_info = gmyth_backend_info_new_full (gnome_vfs_uri_get_host_name (uri),

   287             gnome_vfs_uri_get_user_name (uri),

   288             gnome_vfs_uri_get_password (uri),

   289             NULL,

   290             gnome_vfs_uri_get_host_port (uri));

   291 

   292     file_transfer = gmyth_file_transfer_new (backend_info);

   293     if (gmyth_file_transfer_open (file_transfer, gnome_vfs_uri_get_path (uri)) == TRUE) {

   294         file_info->size = gmyth_file_transfer_get_filesize (file_transfer);

   295         file_info->block_count = GNOME_VFS_FILE_INFO_FIELDS_BLOCK_COUNT;

   296         file_info->io_block_size = GNOME_VFS_FILE_INFO_FIELDS_IO_BLOCK_SIZE;

   297     }

   298 

   299     g_object_unref (file_transfer);

   300     g_object_unref (backend_info);

   301     return GNOME_VFS_OK;

   302 }

   303 

   304 static gboolean

   305 do_is_local (GnomeVFSMethod *method,

   306              const GnomeVFSURI *uri)

   307 {

   308 	return FALSE;

   309 }

   310 

   311 static GnomeVFSMethod method = {

   312 	sizeof (GnomeVFSMethod),

   313 	do_open,

   314 	NULL,

   315 	do_close,

   316 	do_read,

   317 	NULL,

   318 	NULL,

   319 	NULL,

   320 	NULL,

   321 	NULL,

   322 	NULL,

   323 	NULL,

   324 	do_get_file_info,

   325 	NULL,

   326 	do_is_local,

   327 	NULL,

   328 	NULL,

   329 	NULL,

   330 	NULL,

   331 	NULL,

   332 	NULL,

   333 	NULL,

   334 	NULL,

   335 	NULL,

   336 	NULL,

   337 	NULL,

   338 	NULL,

   339 };

   340 

   341 

   342 GnomeVFSMethod *

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

   344 {

   345 	return &method;

   346 }

   347 

   348 void

   349 vfs_module_shutdown (GnomeVFSMethod *method)

   350 {

   351 }
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