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libgnomevfs2-mythtv/modules/mythtv-method.c
author melunko
Fri Jan 19 13:09:21 2007 +0000 (2007-01-19)
branchtrunk
changeset 278 a24bacc8d752
parent 251 9f0346db9a46
child 281 08c4bc759e7a
permissions -rwxr-xr-x
[svn r279] Removed some useless debug messages 
     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 ( gnome_vfs_uri_to_string( uri, GNOME_VFS_URI_HIDE_NONE ) );

   101 	  

   102 	  /* creates an instance of  */  

   103 	  gmyth_uri = gmyth_uri_new_with_value( gnome_vfs_uri_to_string( uri, GNOME_VFS_URI_HIDE_NONE ) );

   104 	  

   105 	  /* Connect to the backend */	  

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

   107 	    myth_handle->livetv = gmyth_livetv_new ();

   108 	    

   109 	    myth_handle->channel_num = gmyth_uri_get_channel_num( gmyth_uri );

   110 	

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

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

   113 	              backend_info) == FALSE) {

   114 	        g_object_unref( gmyth_uri );

   115 	        ret = FALSE;

   116 	      }

   117 	    } else {

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

   119 	      	g_object_unref( gmyth_uri );

   120 	        ret = FALSE;

   121 	      }

   122 	    }

   123 	

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

   125 	

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

   127 	      ret = FALSE;

   128 	    }

   129 	    

   130 	    if ( gmyth_uri != NULL )

   131 	    	g_object_unref( gmyth_uri );

   132 	    	

   133 	  } else {

   134 	

   135 	    myth_handle->file_transfer = gmyth_file_transfer_new (backend_info);

   136 	    

   137 	    /* Verifies if the file exists */

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

   139 	        g_object_unref (backend_info);

   140 					return GNOME_VFS_ERROR_NOT_FOUND;

   141 	    }

   142 	    

   143 	    /* sets the Playback monitor connection */

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

   145 		

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

   147 	  

   148     if (ret == FALSE) {

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

   150 	    return GNOME_VFS_ERROR_NOT_OPEN;

   151 	  } 

   152 	

   153 	  if ( is_livetv == TRUE && ret == TRUE ) {

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

   155 	    wait_to_transfer = 0;

   156 	

   157 	    while ( wait_to_transfer++ < MYTHTV_TRANSFER_MAX_WAITS &&

   158 	        (gmyth_livetv_is_recording (myth_handle->livetv) == FALSE))

   159 	      g_usleep (500);

   160 	

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

   162 	    gmyth_livetv_is_recording (myth_handle->livetv);

   163 	

   164 	    sleep (4);                  /* FIXME: this is evil (tpm) */

   165 	  }

   166 

   167     g_object_unref (backend_info);

   168 

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

   170 

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

   172     

   173     myth_handle->buffer = g_byte_array_sized_new (MYTHTV_BUFFER_SIZE);

   174     myth_handle->buffer_remain = 0;

   175 

   176     *method_handle = (GnomeVFSMethodHandle *) myth_handle;

   177 

   178     return GNOME_VFS_OK;

   179 }

   180 

   181 static GnomeVFSResult

   182 do_read (GnomeVFSMethod *method,

   183          GnomeVFSMethodHandle *method_handle,

   184          gpointer buffer,

   185          GnomeVFSFileSize num_bytes,

   186          GnomeVFSFileSize *bytes_read,

   187          GnomeVFSContext *context)

   188 {

   189     MythtvHandle *myth_handle = (MythtvHandle *) method_handle;

   190     GnomeVFSFileSize bytes_to_read;

   191 

   192     *bytes_read = 0;

   193 

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

   195         return GNOME_VFS_ERROR_EOF;

   196 

   197     // fixme: change this to min math function

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

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

   200     else

   201 	    bytes_to_read = num_bytes;

   202 

   203     /* Loop sending the Myth File Transfer request:

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

   205   

   206     if ( bytes_to_read > myth_handle->buffer_remain ) {

   207         GByteArray *tmp_buffer = g_byte_array_new();

   208 

   209         gint len = gmyth_file_transfer_read (myth_handle->file_transfer,

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

   211 

   212 	if (len < 0) {

   213             g_byte_array_free (tmp_buffer, TRUE);

   214             g_warning ("Fail to read bytes");

   215 	    return GNOME_VFS_ERROR_IO;

   216         } else if (len == 0) {

   217 	    g_byte_array_free (tmp_buffer, TRUE);

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

   219 	    return GNOME_VFS_ERROR_EOF;

   220 	}

   221 

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

   223     		tmp_buffer->data, len);

   224 

   225 		myth_handle->buffer_remain += len;

   226 

   227         g_byte_array_free (tmp_buffer, TRUE);

   228     	tmp_buffer = NULL;    	

   229     }

   230     

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

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

   233 

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

   235 

   236     myth_handle->bytes_read += bytes_to_read;

   237     myth_handle->buffer_remain -= bytes_to_read;    

   238 

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

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

   241     *bytes_read = bytes_to_read;

   242   

   243     return GNOME_VFS_OK;

   244 }

   245 

   246 static GnomeVFSResult

   247 do_close (GnomeVFSMethod *method,

   248           GnomeVFSMethodHandle *method_handle,

   249           GnomeVFSContext *context)

   250 {

   251 

   252     MythtvHandle *myth_handle = (MythtvHandle *) method_handle;

   253 

   254     if (myth_handle->file_transfer) {

   255 	    gmyth_file_transfer_close (myth_handle->file_transfer);

   256         g_object_unref (myth_handle->file_transfer);

   257     	myth_handle->file_transfer = NULL;

   258     }

   259     

   260     if (myth_handle->livetv) {

   261       g_object_unref (myth_handle->livetv);

   262     	myth_handle->livetv = NULL;

   263     }

   264     

   265     if (myth_handle->buffer) {

   266 		g_byte_array_free (myth_handle->buffer, TRUE);

   267 		myth_handle->buffer = NULL;

   268     }

   269 

   270     g_free (myth_handle);

   271 

   272     return GNOME_VFS_OK;

   273 }

   274 

   275 static GnomeVFSResult

   276 do_get_file_info (GnomeVFSMethod *method,

   277                   GnomeVFSURI *uri,

   278                   GnomeVFSFileInfo *file_info,

   279                   GnomeVFSFileInfoOptions options,

   280                   GnomeVFSContext *context)

   281 {

   282     GMythFileTransfer *file_transfer = NULL;

   283     GMythBackendInfo *backend_info = NULL;

   284 

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

   286     file_info->valid_fields = file_info->valid_fields

   287         | GNOME_VFS_FILE_INFO_FIELDS_TYPE

   288         | GNOME_VFS_FILE_INFO_FIELDS_MIME_TYPE

   289         | GNOME_VFS_FILE_INFO_FIELDS_PERMISSIONS;

   290     file_info->type = GNOME_VFS_FILE_TYPE_REGULAR;

   291     // fixme: get from file extension?

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

   293     file_info->permissions =

   294         GNOME_VFS_PERM_USER_READ |

   295         GNOME_VFS_PERM_OTHER_READ |

   296         GNOME_VFS_PERM_GROUP_READ;

   297 

   298     backend_info = gmyth_backend_info_new_full (gnome_vfs_uri_get_host_name (uri),

   299             gnome_vfs_uri_get_user_name (uri),

   300             gnome_vfs_uri_get_password (uri),

   301             NULL,

   302             gnome_vfs_uri_get_host_port (uri));

   303 

   304     file_transfer = gmyth_file_transfer_new (backend_info);

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

   306         file_info->size = gmyth_file_transfer_get_filesize (file_transfer);

   307         file_info->block_count = GNOME_VFS_FILE_INFO_FIELDS_BLOCK_COUNT;

   308         file_info->io_block_size = GNOME_VFS_FILE_INFO_FIELDS_IO_BLOCK_SIZE;

   309     }

   310 

   311     g_object_unref (file_transfer);

   312     g_object_unref (backend_info);

   313     return GNOME_VFS_OK;

   314 }

   315 

   316 static gboolean

   317 do_is_local (GnomeVFSMethod *method,

   318              const GnomeVFSURI *uri)

   319 {

   320 	return FALSE;

   321 }

   322 

   323 static GnomeVFSMethod method = {

   324 	sizeof (GnomeVFSMethod),

   325 	do_open,

   326 	NULL,

   327 	do_close,

   328 	do_read,

   329 	NULL,

   330 	NULL,

   331 	NULL,

   332 	NULL,

   333 	NULL,

   334 	NULL,

   335 	NULL,

   336 	do_get_file_info,

   337 	NULL,

   338 	do_is_local,

   339 	NULL,

   340 	NULL,

   341 	NULL,

   342 	NULL,

   343 	NULL,

   344 	NULL,

   345 	NULL,

   346 	NULL,

   347 	NULL,

   348 	NULL,

   349 	NULL,

   350 	NULL,

   351 };

   352 

   353 

   354 GnomeVFSMethod *

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

   356 {

   357 	return &method;

   358 }

   359 

   360 void

   361 vfs_module_shutdown (GnomeVFSMethod *method)

   362 {

   363 }
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