2 * Copyright (C) 2011 Andoni Morales Alastruey <ylatuya@gmail.com>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
23 #include "gstfragment.h"
24 #include "gsturidownloader.h"
25 #include "gsturidownloader_debug.h"
27 #define GST_CAT_DEFAULT uridownloader_debug
28 GST_DEBUG_CATEGORY (uridownloader_debug);
30 #define GST_URI_DOWNLOADER_GET_PRIVATE(obj) \
31 (G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
32 GST_TYPE_URI_DOWNLOADER, GstUriDownloaderPrivate))
34 struct _GstUriDownloaderPrivate
36 /* Fragments fetcher */
41 GstFragment *download;
47 static void gst_uri_downloader_finalize (GObject * object);
48 static void gst_uri_downloader_dispose (GObject * object);
50 static GstFlowReturn gst_uri_downloader_chain (GstPad * pad, GstObject * parent,
52 static gboolean gst_uri_downloader_sink_event (GstPad * pad, GstObject * parent,
54 static GstBusSyncReply gst_uri_downloader_bus_handler (GstBus * bus,
55 GstMessage * message, gpointer data);
57 static GstStaticPadTemplate sinkpadtemplate = GST_STATIC_PAD_TEMPLATE ("sink",
64 GST_DEBUG_CATEGORY_INIT (uridownloader_debug, "uridownloader", 0, "URI downloader"); \
67 G_DEFINE_TYPE_WITH_CODE (GstUriDownloader, gst_uri_downloader, GST_TYPE_OBJECT,
71 gst_uri_downloader_class_init (GstUriDownloaderClass * klass)
73 GObjectClass *gobject_class;
75 gobject_class = (GObjectClass *) klass;
77 g_type_class_add_private (klass, sizeof (GstUriDownloaderPrivate));
79 gobject_class->dispose = gst_uri_downloader_dispose;
80 gobject_class->finalize = gst_uri_downloader_finalize;
84 gst_uri_downloader_init (GstUriDownloader * downloader)
86 downloader->priv = GST_URI_DOWNLOADER_GET_PRIVATE (downloader);
88 /* Initialize the sink pad. This pad will be connected to the src pad of the
89 * element created with gst_element_make_from_uri and will handle the download */
90 downloader->priv->pad =
91 gst_pad_new_from_static_template (&sinkpadtemplate, "sink");
92 gst_pad_set_chain_function (downloader->priv->pad,
93 GST_DEBUG_FUNCPTR (gst_uri_downloader_chain));
94 gst_pad_set_event_function (downloader->priv->pad,
95 GST_DEBUG_FUNCPTR (gst_uri_downloader_sink_event));
96 gst_pad_set_element_private (downloader->priv->pad, downloader);
97 gst_pad_set_active (downloader->priv->pad, TRUE);
99 /* Create a bus to handle error and warning message from the source element */
100 downloader->priv->bus = gst_bus_new ();
102 g_mutex_init (&downloader->priv->lock);
103 g_cond_init (&downloader->priv->cond);
107 gst_uri_downloader_dispose (GObject * object)
109 GstUriDownloader *downloader = GST_URI_DOWNLOADER (object);
111 if (downloader->priv->urisrc != NULL) {
112 gst_object_unref (downloader->priv->urisrc);
113 downloader->priv->urisrc = NULL;
116 if (downloader->priv->bus != NULL) {
117 gst_object_unref (downloader->priv->bus);
118 downloader->priv->bus = NULL;
121 if (downloader->priv->pad) {
122 gst_object_unref (downloader->priv->pad);
123 downloader->priv->pad = NULL;
126 if (downloader->priv->download) {
127 g_object_unref (downloader->priv->download);
128 downloader->priv->download = NULL;
131 G_OBJECT_CLASS (gst_uri_downloader_parent_class)->dispose (object);
135 gst_uri_downloader_finalize (GObject * object)
137 GstUriDownloader *downloader = GST_URI_DOWNLOADER (object);
139 g_mutex_clear (&downloader->priv->lock);
140 g_cond_clear (&downloader->priv->cond);
142 G_OBJECT_CLASS (gst_uri_downloader_parent_class)->finalize (object);
146 gst_uri_downloader_new (void)
148 return g_object_new (GST_TYPE_URI_DOWNLOADER, NULL);
152 gst_uri_downloader_sink_event (GstPad * pad, GstObject * parent,
155 gboolean ret = FALSE;
156 GstUriDownloader *downloader;
158 downloader = GST_URI_DOWNLOADER (gst_pad_get_element_private (pad));
160 switch (event->type) {
162 GST_OBJECT_LOCK (downloader);
163 GST_DEBUG_OBJECT (downloader, "Got EOS on the fetcher pad");
164 if (downloader->priv->download != NULL) {
165 /* signal we have fetched the URI */
166 downloader->priv->download->completed = TRUE;
167 downloader->priv->download->download_stop_time =
168 gst_util_get_timestamp ();
169 GST_OBJECT_UNLOCK (downloader);
170 GST_DEBUG_OBJECT (downloader, "Signaling chain funtion");
171 g_mutex_lock (&downloader->priv->lock);
172 g_cond_signal (&downloader->priv->cond);
173 g_mutex_unlock (&downloader->priv->lock);
175 GST_OBJECT_UNLOCK (downloader);
177 gst_event_unref (event);
181 ret = gst_pad_event_default (pad, parent, event);
188 static GstBusSyncReply
189 gst_uri_downloader_bus_handler (GstBus * bus,
190 GstMessage * message, gpointer data)
192 GstUriDownloader *downloader = (GstUriDownloader *) (data);
194 if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ERROR ||
195 GST_MESSAGE_TYPE (message) == GST_MESSAGE_WARNING) {
197 gchar *dbg_info = NULL;
199 gst_message_parse_error (message, &err, &dbg_info);
200 GST_WARNING_OBJECT (downloader,
201 "Received error: %s from %s, the download will be cancelled",
202 GST_OBJECT_NAME (message->src), err->message);
203 GST_DEBUG ("Debugging info: %s\n", (dbg_info) ? dbg_info : "none");
207 /* remove the sync handler to avoid duplicated messages */
208 gst_bus_set_sync_handler (downloader->priv->bus, NULL, NULL, NULL);
209 gst_uri_downloader_cancel (downloader);
212 gst_message_unref (message);
217 gst_uri_downloader_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
219 GstUriDownloader *downloader;
221 downloader = GST_URI_DOWNLOADER (gst_pad_get_element_private (pad));
223 /* HTML errors (404, 500, etc...) are also pushed through this pad as
224 * response but the source element will also post a warning or error message
225 * in the bus, which is handled synchronously cancelling the download.
227 GST_OBJECT_LOCK (downloader);
228 if (downloader->priv->download == NULL) {
229 /* Download cancelled, quit */
230 GST_OBJECT_UNLOCK (downloader);
234 GST_LOG_OBJECT (downloader, "The uri fetcher received a new buffer "
235 "of size %" G_GSIZE_FORMAT, gst_buffer_get_size (buf));
236 if (!gst_fragment_add_buffer (downloader->priv->download, buf))
237 GST_WARNING_OBJECT (downloader, "Could not add buffer to fragment");
238 GST_OBJECT_UNLOCK (downloader);
247 gst_uri_downloader_stop (GstUriDownloader * downloader)
251 GST_DEBUG_OBJECT (downloader, "Stopping source element");
253 /* remove the bus' sync handler */
254 gst_bus_set_sync_handler (downloader->priv->bus, NULL, NULL, NULL);
255 /* unlink the source element from the internal pad */
256 pad = gst_pad_get_peer (downloader->priv->pad);
258 gst_pad_unlink (pad, downloader->priv->pad);
259 gst_object_unref (pad);
261 /* set the element state to NULL */
262 gst_element_set_state (downloader->priv->urisrc, GST_STATE_NULL);
263 gst_element_get_state (downloader->priv->urisrc, NULL, NULL,
264 GST_CLOCK_TIME_NONE);
268 gst_uri_downloader_reset (GstUriDownloader * downloader)
270 g_return_if_fail (downloader != NULL);
272 GST_OBJECT_LOCK (downloader);
273 downloader->priv->cancelled = FALSE;
274 GST_OBJECT_UNLOCK (downloader);
278 gst_uri_downloader_cancel (GstUriDownloader * downloader)
280 GST_OBJECT_LOCK (downloader);
281 if (downloader->priv->download != NULL) {
282 GST_DEBUG_OBJECT (downloader, "Cancelling download");
283 g_object_unref (downloader->priv->download);
284 downloader->priv->download = NULL;
285 downloader->priv->cancelled = TRUE;
286 GST_OBJECT_UNLOCK (downloader);
287 GST_DEBUG_OBJECT (downloader, "Signaling chain funtion");
288 g_mutex_lock (&downloader->priv->lock);
289 g_cond_signal (&downloader->priv->cond);
290 g_mutex_unlock (&downloader->priv->lock);
294 cancelled = downloader->priv->cancelled;
295 downloader->priv->cancelled = TRUE;
296 GST_OBJECT_UNLOCK (downloader);
298 GST_DEBUG_OBJECT (downloader,
299 "Trying to cancell a download that was alredy cancelled");
304 gst_uri_downloader_set_uri (GstUriDownloader * downloader, const gchar * uri)
308 if (!gst_uri_is_valid (uri))
311 GST_DEBUG_OBJECT (downloader, "Creating source element for the URI:%s", uri);
312 downloader->priv->urisrc =
313 gst_element_make_from_uri (GST_URI_SRC, uri, NULL, NULL);
314 if (!downloader->priv->urisrc)
317 /* add a sync handler for the bus messages to detect errors in the download */
318 gst_element_set_bus (GST_ELEMENT (downloader->priv->urisrc),
319 downloader->priv->bus);
320 gst_bus_set_sync_handler (downloader->priv->bus,
321 gst_uri_downloader_bus_handler, downloader, NULL);
323 pad = gst_element_get_static_pad (downloader->priv->urisrc, "src");
326 gst_pad_link (pad, downloader->priv->pad);
327 gst_object_unref (pad);
332 gst_uri_downloader_fetch_uri (GstUriDownloader * downloader, const gchar * uri)
334 GstStateChangeReturn ret;
335 GstFragment *download = NULL;
337 g_mutex_lock (&downloader->priv->lock);
339 if (downloader->priv->cancelled) {
343 if (!gst_uri_downloader_set_uri (downloader, uri)) {
347 downloader->priv->download = gst_fragment_new ();
349 ret = gst_element_set_state (downloader->priv->urisrc, GST_STATE_PLAYING);
350 if (ret == GST_STATE_CHANGE_FAILURE) {
351 g_object_unref (downloader->priv->download);
352 downloader->priv->download = NULL;
357 * - the download succeed (EOS in the src pad)
358 * - the download failed (Error message on the fetcher bus)
359 * - the download was canceled
361 GST_DEBUG_OBJECT (downloader, "Waiting to fetch the URI %s", uri);
362 g_cond_wait (&downloader->priv->cond, &downloader->priv->lock);
364 if (downloader->priv->cancelled) {
365 if (downloader->priv->download) {
366 g_object_unref (downloader->priv->download);
367 downloader->priv->download = NULL;
372 GST_OBJECT_LOCK (downloader);
373 download = downloader->priv->download;
374 downloader->priv->download = NULL;
375 GST_OBJECT_UNLOCK (downloader);
377 if (download != NULL)
378 GST_INFO_OBJECT (downloader, "URI fetched successfully");
380 GST_INFO_OBJECT (downloader, "Error fetching URI");
384 gst_uri_downloader_stop (downloader);
385 g_mutex_unlock (&downloader->priv->lock);