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00022 #include <stdio.h>
00023 #include <string.h>
00024
00025 #include <libaudcore/audstrings.h>
00026
00027 #include "debug.h"
00028 #include "misc.h"
00029 #include "playlist.h"
00030 #include "plugin.h"
00031 #include "plugins.h"
00032 #include "probe-buffer.h"
00033
00034 typedef struct
00035 {
00036 gchar * filename;
00037 VFSFile * handle;
00038 gboolean buffered;
00039 PluginHandle * plugin;
00040 }
00041 ProbeState;
00042
00043 static gboolean check_opened (ProbeState * state)
00044 {
00045 if (state->handle != NULL)
00046 return TRUE;
00047
00048 AUDDBG ("Opening %s.\n", state->filename);
00049 if ((state->buffered = vfs_is_remote (state->filename)))
00050 state->handle = probe_buffer_new (state->filename);
00051 else
00052 state->handle = vfs_fopen (state->filename, "r");
00053
00054 if (state->handle != NULL)
00055 return TRUE;
00056
00057 AUDDBG ("FAILED.\n");
00058 return FALSE;
00059 }
00060
00061 static gboolean probe_func (PluginHandle * plugin, ProbeState * state)
00062 {
00063 AUDDBG ("Trying %s.\n", plugin_get_name (plugin));
00064 InputPlugin * decoder = plugin_get_header (plugin);
00065 if (decoder == NULL)
00066 return TRUE;
00067
00068 if (decoder->is_our_file_from_vfs != NULL)
00069 {
00070 if (! check_opened (state))
00071 return FALSE;
00072
00073 if (state->buffered)
00074 probe_buffer_set_decoder (state->handle, plugin_get_name (plugin));
00075
00076 if (decoder->is_our_file_from_vfs (state->filename, state->handle))
00077 {
00078 state->plugin = plugin;
00079 return FALSE;
00080 }
00081
00082 if (vfs_fseek (state->handle, 0, SEEK_SET) < 0)
00083 return FALSE;
00084 }
00085
00086 return TRUE;
00087 }
00088
00089
00090
00091
00092
00093
00094
00095
00096
00097
00098
00099
00100
00101 static gboolean probe_func_fast (PluginHandle * plugin, ProbeState * state)
00102 {
00103 if (state->plugin != NULL)
00104 {
00105 PluginHandle * prev = state->plugin;
00106 state->plugin = NULL;
00107
00108 if (prev != NULL && ! probe_func (prev, state))
00109 return FALSE;
00110 }
00111
00112 AUDDBG ("Guessing %s.\n", plugin_get_name (plugin));
00113 state->plugin = plugin;
00114 return TRUE;
00115 }
00116
00117 static void probe_by_scheme (ProbeState * state)
00118 {
00119 gchar * s = strstr (state->filename, "://");
00120
00121 if (s == NULL)
00122 return;
00123
00124 AUDDBG ("Probing by scheme.\n");
00125 * s = 0;
00126 input_plugin_for_key (INPUT_KEY_SCHEME, state->filename, (PluginForEachFunc)
00127 probe_func_fast, state);
00128 * s = ':';
00129 }
00130
00131 static void probe_by_extension (ProbeState * state)
00132 {
00133 gchar * s = strrchr (state->filename, '.');
00134
00135 if (s == NULL)
00136 return;
00137
00138 AUDDBG ("Probing by extension.\n");
00139 s = g_ascii_strdown (s + 1, -1);
00140
00141 gchar * q = strrchr (s, '?');
00142 if (q != NULL)
00143 * q = 0;
00144
00145 input_plugin_for_key (INPUT_KEY_EXTENSION, s, (PluginForEachFunc)
00146 probe_func_fast, state);
00147 g_free (s);
00148 }
00149
00150 static void probe_by_mime (ProbeState * state)
00151 {
00152 gchar * mime;
00153
00154 if (! check_opened (state))
00155 return;
00156
00157 if ((mime = vfs_get_metadata (state->handle, "content-type")) == NULL)
00158 return;
00159
00160 AUDDBG ("Probing by MIME type.\n");
00161 input_plugin_for_key (INPUT_KEY_MIME, mime, (PluginForEachFunc)
00162 probe_func_fast, state);
00163 g_free (mime);
00164 }
00165
00166 static void probe_by_content (ProbeState * state)
00167 {
00168 AUDDBG ("Probing by content.\n");
00169 plugin_for_enabled (PLUGIN_TYPE_INPUT, (PluginForEachFunc) probe_func, state);
00170 }
00171
00172 PluginHandle * file_find_decoder (const gchar * filename, gboolean fast)
00173 {
00174 ProbeState state;
00175
00176 AUDDBG ("Probing %s.\n", filename);
00177 state.plugin = NULL;
00178 state.filename = filename_split_subtune (filename, NULL);
00179 state.handle = NULL;
00180
00181 probe_by_scheme (& state);
00182
00183 if (state.plugin != NULL)
00184 goto DONE;
00185
00186 probe_by_extension (& state);
00187
00188 if (state.plugin != NULL || fast)
00189 goto DONE;
00190
00191 probe_by_mime (& state);
00192
00193 if (state.plugin != NULL)
00194 goto DONE;
00195
00196 probe_by_content (& state);
00197
00198 DONE:
00199 g_free (state.filename);
00200
00201 if (state.handle != NULL)
00202 vfs_fclose (state.handle);
00203
00204 return state.plugin;
00205 }
00206
00207 Tuple * file_read_tuple (const gchar * filename, PluginHandle * decoder)
00208 {
00209 InputPlugin * ip = plugin_get_header (decoder);
00210 g_return_val_if_fail (ip, NULL);
00211 g_return_val_if_fail (ip->probe_for_tuple, NULL);
00212
00213 gchar * real = filename_split_subtune (filename, NULL);
00214 VFSFile * handle = vfs_fopen (real, "r");
00215 g_free (real);
00216
00217 Tuple * tuple = ip->probe_for_tuple (filename, handle);
00218
00219 if (handle)
00220 vfs_fclose (handle);
00221
00222 return tuple;
00223 }
00224
00225 gboolean file_read_image (const gchar * filename, PluginHandle * decoder,
00226 void * * data, gint * size)
00227 {
00228 if (! input_plugin_has_images (decoder))
00229 return FALSE;
00230
00231 InputPlugin * ip = plugin_get_header (decoder);
00232 g_return_val_if_fail (ip, FALSE);
00233 g_return_val_if_fail (ip->get_song_image, FALSE);
00234
00235 gchar * real = filename_split_subtune (filename, NULL);
00236 VFSFile * handle = vfs_fopen (real, "r");
00237 g_free (real);
00238
00239 gboolean success = ip->get_song_image (filename, handle, data, size);
00240
00241 if (handle)
00242 vfs_fclose (handle);
00243
00244 return success;
00245 }
00246
00247 gboolean file_can_write_tuple (const gchar * filename, PluginHandle * decoder)
00248 {
00249 return input_plugin_can_write_tuple (decoder);
00250 }
00251
00252 gboolean file_write_tuple (const gchar * filename, PluginHandle * decoder,
00253 const Tuple * tuple)
00254 {
00255 InputPlugin * ip = plugin_get_header (decoder);
00256 g_return_val_if_fail (ip, FALSE);
00257 g_return_val_if_fail (ip->update_song_tuple, FALSE);
00258
00259 gchar * real = filename_split_subtune (filename, NULL);
00260 VFSFile * handle = vfs_fopen (real, "r+");
00261 g_free (real);
00262
00263 if (! handle)
00264 return FALSE;
00265
00266 gboolean success = ip->update_song_tuple (tuple, handle);
00267
00268 if (handle)
00269 vfs_fclose (handle);
00270
00271 if (success)
00272 playlist_rescan_file (filename);
00273
00274 return success;
00275 }
00276
00277 gboolean custom_infowin (const gchar * filename, PluginHandle * decoder)
00278 {
00279 if (! input_plugin_has_infowin (decoder))
00280 return FALSE;
00281
00282 InputPlugin * ip = plugin_get_header (decoder);
00283 g_return_val_if_fail (ip, FALSE);
00284 g_return_val_if_fail (ip->file_info_box, FALSE);
00285
00286 ip->file_info_box (filename);
00287 return TRUE;
00288 }