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libgnomevfs2-mythtv/modules/mythtv-method.c
author rosfran
Wed Jan 24 14:51:46 2007 +0000 (2007-01-24)
branchtrunk
changeset 296 346b67519f6d
parent 290 96b436a81e53
child 297 c81bc5ed0ccb
permissions -rwxr-xr-x
[svn r297] Moved the sync (sleep) calls from GStreamer MythTV source plug-in to the gmtyh. 
     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 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 = -1;

    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 	  /* Connect to the backend */	  

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

   106 	    myth_handle->livetv = gmyth_livetv_new ();

   107 	    

   108 	    myth_handle->channel_num = gmyth_uri_get_channel_num( gmyth_uri );

   109 	

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

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

   112 	              backend_info) == FALSE) {

   113 	        g_object_unref( gmyth_uri );

   114 	        ret = FALSE;

   115 	      }

   116 	    } else {

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

   118 	      	g_object_unref( gmyth_uri );

   119 	        ret = FALSE;

   120 	      }

   121 	    }

   122 	

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

   124 	

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

   126 	      ret = FALSE;

   127 	    }

   128 	    

   129 	    if ( gmyth_uri != NULL )

   130 	    	g_object_unref( gmyth_uri );

   131 	    	

   132 	  } else {

   133 	

   134 	    myth_handle->file_transfer = gmyth_file_transfer_new (backend_info);

   135 	    

   136 	    /* Verifies if the file exists */

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

   138 	        g_object_unref (backend_info);

   139 					return GNOME_VFS_ERROR_NOT_FOUND;

   140 	    }

   141 	    

   142 	    /* sets the Playback monitor connection */

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

   144 		

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

   146 	  

   147     if (ret == FALSE) {

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

   149 	    return GNOME_VFS_ERROR_NOT_OPEN;

   150 	  } 

   151 

   152     g_object_unref (backend_info);

   153 

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

   155 

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

   157     

   158     myth_handle->buffer = g_byte_array_sized_new (MYTHTV_BUFFER_SIZE);

   159     myth_handle->buffer_remain = 0;

   160 

   161     *method_handle = (GnomeVFSMethodHandle *) myth_handle;

   162 

   163     return GNOME_VFS_OK;

   164 }

   165 

   166 static GnomeVFSResult

   167 do_read (GnomeVFSMethod *method,

   168          GnomeVFSMethodHandle *method_handle,

   169          gpointer buffer,

   170          GnomeVFSFileSize num_bytes,

   171          GnomeVFSFileSize *bytes_read,

   172          GnomeVFSContext *context)

   173 {

   174     MythtvHandle *myth_handle = (MythtvHandle *) method_handle;

   175     GnomeVFSFileSize bytes_to_read;

   176 

   177     *bytes_read = 0;

   178 

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

   180         return GNOME_VFS_ERROR_EOF;

   181 

   182     // fixme: change this to min math function

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

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

   185     else

   186 	    bytes_to_read = num_bytes;

   187 

   188     /* Loop sending the Myth File Transfer request:

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

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

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

   192         GByteArray *tmp_buffer = g_byte_array_new();

   193 

   194         gint len = gmyth_file_transfer_read (myth_handle->file_transfer,

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

   196 

   197 	if (len < 0) {

   198             g_byte_array_free (tmp_buffer, TRUE);

   199             g_warning ("Fail to read bytes");

   200 	    return GNOME_VFS_ERROR_IO;

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

   202 	    g_byte_array_free (tmp_buffer, TRUE);

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

   204 	    return GNOME_VFS_ERROR_EOF;

   205 	}*/

   206 

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

   208     		tmp_buffer->data, len);

   209 

   210 		myth_handle->buffer_remain += len;

   211 

   212         g_byte_array_free (tmp_buffer, TRUE);

   213     	tmp_buffer = NULL;    	

   214     }

   215     

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

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

   218 

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

   220 

   221     myth_handle->bytes_read += bytes_to_read;

   222     myth_handle->buffer_remain -= bytes_to_read;    

   223 

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

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

   226     *bytes_read = bytes_to_read;

   227   

   228     return GNOME_VFS_OK;

   229 }

   230 

   231 static GnomeVFSResult

   232 do_close (GnomeVFSMethod *method,

   233           GnomeVFSMethodHandle *method_handle,

   234           GnomeVFSContext *context)

   235 {

   236 

   237     MythtvHandle *myth_handle = (MythtvHandle *) method_handle;

   238 

   239     if (myth_handle->file_transfer) {

   240 	    gmyth_file_transfer_close (myth_handle->file_transfer);

   241         g_object_unref (myth_handle->file_transfer);

   242     	myth_handle->file_transfer = NULL;

   243     }

   244     

   245     if (myth_handle->livetv) {

   246       g_object_unref (myth_handle->livetv);

   247     	myth_handle->livetv = NULL;

   248     }

   249     

   250     if (myth_handle->buffer) {

   251 		g_byte_array_free (myth_handle->buffer, TRUE);

   252 		myth_handle->buffer = NULL;

   253     }

   254 

   255     g_free (myth_handle);

   256 

   257     return GNOME_VFS_OK;

   258 }

   259 

   260 static GnomeVFSResult

   261 do_get_file_info (GnomeVFSMethod *method,

   262                   GnomeVFSURI *uri,

   263                   GnomeVFSFileInfo *file_info,

   264                   GnomeVFSFileInfoOptions options,

   265                   GnomeVFSContext *context)

   266 {

   267     GMythFileTransfer *file_transfer = NULL;

   268     GMythBackendInfo *backend_info = NULL;

   269 

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

   271     file_info->valid_fields = file_info->valid_fields

   272         | GNOME_VFS_FILE_INFO_FIELDS_TYPE

   273         | GNOME_VFS_FILE_INFO_FIELDS_MIME_TYPE

   274         | GNOME_VFS_FILE_INFO_FIELDS_PERMISSIONS;

   275     file_info->type = GNOME_VFS_FILE_TYPE_REGULAR;

   276     // fixme: get from file extension?

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

   278     file_info->permissions =

   279         GNOME_VFS_PERM_USER_READ |

   280         GNOME_VFS_PERM_OTHER_READ |

   281         GNOME_VFS_PERM_GROUP_READ;

   282 

   283     backend_info = gmyth_backend_info_new_full (gnome_vfs_uri_get_host_name (uri),

   284             gnome_vfs_uri_get_user_name (uri),

   285             gnome_vfs_uri_get_password (uri),

   286             NULL,

   287             gnome_vfs_uri_get_host_port (uri));

   288 

   289     file_transfer = gmyth_file_transfer_new (backend_info);

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

   291         file_info->size = gmyth_file_transfer_get_filesize (file_transfer);

   292         file_info->block_count = GNOME_VFS_FILE_INFO_FIELDS_BLOCK_COUNT;

   293         file_info->io_block_size = GNOME_VFS_FILE_INFO_FIELDS_IO_BLOCK_SIZE;

   294     }

   295 

   296     g_object_unref (file_transfer);

   297     g_object_unref (backend_info);

   298     return GNOME_VFS_OK;

   299 }

   300 

   301 static gboolean

   302 do_is_local (GnomeVFSMethod *method,

   303              const GnomeVFSURI *uri)

   304 {

   305 	return FALSE;

   306 }

   307 

   308 static GnomeVFSMethod method = {

   309 	sizeof (GnomeVFSMethod),

   310 	do_open,

   311 	NULL,

   312 	do_close,

   313 	do_read,

   314 	NULL,

   315 	NULL,

   316 	NULL,

   317 	NULL,

   318 	NULL,

   319 	NULL,

   320 	NULL,

   321 	do_get_file_info,

   322 	NULL,

   323 	do_is_local,

   324 	NULL,

   325 	NULL,

   326 	NULL,

   327 	NULL,

   328 	NULL,

   329 	NULL,

   330 	NULL,

   331 	NULL,

   332 	NULL,

   333 	NULL,

   334 	NULL,

   335 	NULL,

   336 };

   337 

   338 

   339 GnomeVFSMethod *

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

   341 {

   342 	return &method;

   343 }

   344 

   345 void

   346 vfs_module_shutdown (GnomeVFSMethod *method)

   347 {

   348 }
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