--- /dev/null
+/* GStreamer
+ * Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
+ * 2009 Nokia Corporation
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * SECTION:gstdiscoverer
+ * @short_description: Utility for discovering information on URIs.
+ *
+ * The #GstDiscoverer is a utility object which allows to get as much
+ * information as possible from one or many URIs.
+ *
+ * It provides two APIs, allowing usage in blocking or non-blocking mode.
+ *
+ * The blocking mode just requires calling gst_discoverer_discover_uri()
+ * with the URI one wishes to discover.
+ *
+ * The non-blocking mode requires a running #GMainLoop in the default
+ * #GMainContext, where one connects to the various signals, appends the
+ * URIs to be processed (through gst_discoverer_discover_uri_async()) and then
+ * asks for the discovery to begin (through gst_discoverer_start()).
+ *
+ * All the information is returned in a #GstDiscovererInfo structure.
+ *
+ * Since: 0.10.31
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/video/video.h>
+#include "pbutils.h"
+#include "pbutils-marshal.h"
+#include "pbutils-private.h"
+
+GST_DEBUG_CATEGORY_STATIC (discoverer_debug);
+#define GST_CAT_DEFAULT discoverer_debug
+
+static GQuark _CAPS_QUARK;
+static GQuark _TAGS_QUARK;
+static GQuark _MISSING_PLUGIN_QUARK;
+static GQuark _STREAM_TOPOLOGY_QUARK;
+static GQuark _TOPOLOGY_PAD_QUARK;
+
+
+typedef struct
+{
+ GstDiscoverer *dc;
+ GstPad *pad;
+ GstElement *queue;
+ GstElement *sink;
+ GstTagList *tags;
+} PrivateStream;
+
+struct _GstDiscovererPrivate
+{
+ gboolean async;
+
+ /* allowed time to discover each uri in nanoseconds */
+ GstClockTime timeout;
+
+ /* list of pending URI to process (current excluded) */
+ GList *pending_uris;
+
+ GMutex *lock;
+
+ /* TRUE if processing a URI */
+ gboolean processing;
+
+ /* TRUE if discoverer has been started */
+ gboolean running;
+
+ /* current items */
+ GstDiscovererInfo *current_info;
+ GError *current_error;
+ GstStructure *current_topology;
+
+ /* List of private streams */
+ GList *streams;
+
+ /* Global elements */
+ GstBin *pipeline;
+ GstElement *uridecodebin;
+ GstBus *bus;
+
+ GType decodebin2_type;
+
+ /* Custom main context variables */
+ GMainContext *ctx;
+ guint sourceid;
+ guint timeoutid;
+
+ /* reusable queries */
+ GstQuery *seeking_query;
+
+ /* Handler ids for various callbacks */
+ gulong pad_added_id;
+ gulong pad_remove_id;
+ gulong element_added_id;
+ gulong bus_cb_id;
+};
+
+#define DISCO_LOCK(dc) g_mutex_lock (dc->priv->lock);
+#define DISCO_UNLOCK(dc) g_mutex_unlock (dc->priv->lock);
+
+static void
+_do_init (void)
+{
+ GST_DEBUG_CATEGORY_INIT (discoverer_debug, "discoverer", 0, "Discoverer");
+
+ _CAPS_QUARK = g_quark_from_static_string ("caps");
+ _TAGS_QUARK = g_quark_from_static_string ("tags");
+ _MISSING_PLUGIN_QUARK = g_quark_from_static_string ("missing-plugin");
+ _STREAM_TOPOLOGY_QUARK = g_quark_from_static_string ("stream-topology");
+ _TOPOLOGY_PAD_QUARK = g_quark_from_static_string ("pad");
+};
+
+G_DEFINE_TYPE_EXTENDED (GstDiscoverer, gst_discoverer, G_TYPE_OBJECT, 0,
+ _do_init ());
+
+enum
+{
+ SIGNAL_FINISHED,
+ SIGNAL_STARTING,
+ SIGNAL_DISCOVERED,
+ LAST_SIGNAL
+};
+
+#define DEFAULT_PROP_TIMEOUT 15 * GST_SECOND
+
+enum
+{
+ PROP_0,
+ PROP_TIMEOUT
+};
+
+static guint gst_discoverer_signals[LAST_SIGNAL] = { 0 };
+
+static void gst_discoverer_set_timeout (GstDiscoverer * dc,
+ GstClockTime timeout);
+static gboolean async_timeout_cb (GstDiscoverer * dc);
+
+static void discoverer_bus_cb (GstBus * bus, GstMessage * msg,
+ GstDiscoverer * dc);
+static void uridecodebin_pad_added_cb (GstElement * uridecodebin, GstPad * pad,
+ GstDiscoverer * dc);
+static void uridecodebin_pad_removed_cb (GstElement * uridecodebin,
+ GstPad * pad, GstDiscoverer * dc);
+
+static void gst_discoverer_dispose (GObject * dc);
+static void gst_discoverer_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
+static void gst_discoverer_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec);
+
+static void
+gst_discoverer_class_init (GstDiscovererClass * klass)
+{
+ GObjectClass *gobject_class = (GObjectClass *) klass;
+
+ gobject_class->dispose = gst_discoverer_dispose;
+
+ gobject_class->set_property = gst_discoverer_set_property;
+ gobject_class->get_property = gst_discoverer_get_property;
+
+ g_type_class_add_private (klass, sizeof (GstDiscovererPrivate));
+
+ /* properties */
+ /**
+ * GstDiscoverer:timeout
+ *
+ * The duration (in nanoseconds) after which the discovery of an individual
+ * URI will timeout.
+ *
+ * If the discovery of a URI times out, the %GST_DISCOVERER_TIMEOUT will be
+ * set on the result flags.
+ */
+ g_object_class_install_property (gobject_class, PROP_TIMEOUT,
+ g_param_spec_uint64 ("timeout", "timeout", "Timeout",
+ GST_SECOND, 3600 * GST_SECOND, DEFAULT_PROP_TIMEOUT,
+ G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS));
+
+ /* signals */
+ /**
+ * GstDiscoverer::finished:
+ * @discoverer: the #GstDiscoverer
+ *
+ * Will be emitted when all pending URIs have been processed.
+ */
+ gst_discoverer_signals[SIGNAL_FINISHED] =
+ g_signal_new ("finished", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GstDiscovererClass, finished),
+ NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
+
+ /**
+ * GstDiscoverer::starting:
+ * @discoverer: the #GstDiscoverer
+ *
+ * Will be emitted when the discover starts analyzing the pending URIs
+ */
+ gst_discoverer_signals[SIGNAL_STARTING] =
+ g_signal_new ("starting", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GstDiscovererClass, starting),
+ NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE);
+
+ /**
+ * GstDiscoverer::discovered:
+ * @discoverer: the #GstDiscoverer
+ * @info: the results #GstDiscovererInfo
+ * @error: (type GLib.Error): #GError, which will be non-NULL if an error
+ * occurred during discovery
+ *
+ * Will be emitted when all information on a URI could be discovered.
+ */
+ gst_discoverer_signals[SIGNAL_DISCOVERED] =
+ g_signal_new ("discovered", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GstDiscovererClass, discovered),
+ NULL, NULL, pbutils_marshal_VOID__POINTER_BOXED,
+ G_TYPE_NONE, 2, GST_TYPE_DISCOVERER_INFO, GST_TYPE_G_ERROR);
+}
+
+static void
+uridecodebin_element_added_cb (GstElement * uridecodebin,
+ GstElement * child, GstDiscoverer * dc)
+{
+ GST_DEBUG ("New element added to uridecodebin : %s",
+ GST_ELEMENT_NAME (child));
+
+ if (G_OBJECT_TYPE (child) == dc->priv->decodebin2_type) {
+ g_object_set (child, "post-stream-topology", TRUE, NULL);
+ }
+}
+
+static void
+gst_discoverer_init (GstDiscoverer * dc)
+{
+ GstElement *tmp;
+ GstFormat format = GST_FORMAT_TIME;
+
+ dc->priv = G_TYPE_INSTANCE_GET_PRIVATE (dc, GST_TYPE_DISCOVERER,
+ GstDiscovererPrivate);
+
+ dc->priv->timeout = DEFAULT_PROP_TIMEOUT;
+ dc->priv->async = FALSE;
+
+ dc->priv->lock = g_mutex_new ();
+
+ GST_LOG ("Creating pipeline");
+ dc->priv->pipeline = (GstBin *) gst_pipeline_new ("Discoverer");
+ GST_LOG_OBJECT (dc, "Creating uridecodebin");
+ dc->priv->uridecodebin =
+ gst_element_factory_make ("uridecodebin", "discoverer-uri");
+ if (G_UNLIKELY (dc->priv->uridecodebin == NULL)) {
+ GST_ERROR ("Can't create uridecodebin");
+ return;
+ }
+ GST_LOG_OBJECT (dc, "Adding uridecodebin to pipeline");
+ gst_bin_add (dc->priv->pipeline, dc->priv->uridecodebin);
+
+ dc->priv->pad_added_id =
+ g_signal_connect_object (dc->priv->uridecodebin, "pad-added",
+ G_CALLBACK (uridecodebin_pad_added_cb), dc, 0);
+ dc->priv->pad_remove_id =
+ g_signal_connect_object (dc->priv->uridecodebin, "pad-removed",
+ G_CALLBACK (uridecodebin_pad_removed_cb), dc, 0);
+
+ GST_LOG_OBJECT (dc, "Getting pipeline bus");
+ dc->priv->bus = gst_pipeline_get_bus ((GstPipeline *) dc->priv->pipeline);
+
+ dc->priv->bus_cb_id =
+ g_signal_connect_object (dc->priv->bus, "message",
+ G_CALLBACK (discoverer_bus_cb), dc, 0);
+
+ GST_DEBUG_OBJECT (dc, "Done initializing Discoverer");
+
+ /* This is ugly. We get the GType of decodebin2 so we can quickly detect
+ * when a decodebin2 is added to uridecodebin so we can set the
+ * post-stream-topology setting to TRUE */
+ dc->priv->element_added_id =
+ g_signal_connect_object (dc->priv->uridecodebin, "element-added",
+ G_CALLBACK (uridecodebin_element_added_cb), dc, 0);
+ tmp = gst_element_factory_make ("decodebin2", NULL);
+ dc->priv->decodebin2_type = G_OBJECT_TYPE (tmp);
+ gst_object_unref (tmp);
+
+ /* create queries */
+ dc->priv->seeking_query = gst_query_new_seeking (format);
+}
+
+static void
+discoverer_reset (GstDiscoverer * dc)
+{
+ GST_DEBUG_OBJECT (dc, "Resetting");
+
+ if (dc->priv->pending_uris) {
+ g_list_foreach (dc->priv->pending_uris, (GFunc) g_free, NULL);
+ g_list_free (dc->priv->pending_uris);
+ dc->priv->pending_uris = NULL;
+ }
+
+ if (dc->priv->pipeline)
+ gst_element_set_state ((GstElement *) dc->priv->pipeline, GST_STATE_NULL);
+}
+
+#define DISCONNECT_SIGNAL(o,i) G_STMT_START{ \
+ if ((i) && g_signal_handler_is_connected ((o), (i))) \
+ g_signal_handler_disconnect ((o), (i)); \
+ (i) = 0; \
+}G_STMT_END
+
+static void
+gst_discoverer_dispose (GObject * obj)
+{
+ GstDiscoverer *dc = (GstDiscoverer *) obj;
+
+ GST_DEBUG_OBJECT (dc, "Disposing");
+
+ discoverer_reset (dc);
+
+ if (G_LIKELY (dc->priv->pipeline)) {
+ /* Workaround for bug #118536 */
+ DISCONNECT_SIGNAL (dc->priv->uridecodebin, dc->priv->pad_added_id);
+ DISCONNECT_SIGNAL (dc->priv->uridecodebin, dc->priv->pad_remove_id);
+ DISCONNECT_SIGNAL (dc->priv->uridecodebin, dc->priv->element_added_id);
+ DISCONNECT_SIGNAL (dc->priv->bus, dc->priv->bus_cb_id);
+
+ /* pipeline was set to NULL in _reset */
+ gst_object_unref (dc->priv->pipeline);
+ gst_object_unref (dc->priv->bus);
+
+ dc->priv->pipeline = NULL;
+ dc->priv->uridecodebin = NULL;
+ dc->priv->bus = NULL;
+ }
+
+ gst_discoverer_stop (dc);
+
+ if (dc->priv->lock) {
+ g_mutex_free (dc->priv->lock);
+ dc->priv->lock = NULL;
+ }
+
+ if (dc->priv->seeking_query) {
+ gst_query_unref (dc->priv->seeking_query);
+ dc->priv->seeking_query = NULL;
+ }
+
+ G_OBJECT_CLASS (gst_discoverer_parent_class)->dispose (obj);
+}
+
+static void
+gst_discoverer_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
+{
+ GstDiscoverer *dc = (GstDiscoverer *) object;
+
+ switch (prop_id) {
+ case PROP_TIMEOUT:
+ gst_discoverer_set_timeout (dc, g_value_get_uint64 (value));
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_discoverer_get_property (GObject * object, guint prop_id,
+ GValue * value, GParamSpec * pspec)
+{
+ GstDiscoverer *dc = (GstDiscoverer *) object;
+
+ switch (prop_id) {
+ case PROP_TIMEOUT:
+ DISCO_LOCK (dc);
+ g_value_set_uint64 (value, dc->priv->timeout);
+ DISCO_UNLOCK (dc);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gst_discoverer_set_timeout (GstDiscoverer * dc, GstClockTime timeout)
+{
+ GST_DEBUG_OBJECT (dc, "timeout : %" GST_TIME_FORMAT, GST_TIME_ARGS (timeout));
+
+ /* FIXME : update current pending timeout if we're running */
+ DISCO_LOCK (dc);
+ dc->priv->timeout = timeout;
+ DISCO_UNLOCK (dc);
+}
+
+static gboolean
+_event_probe (GstPad * pad, GstEvent * event, PrivateStream * ps)
+{
+ if (GST_EVENT_TYPE (event) == GST_EVENT_TAG) {
+ GstTagList *tl = NULL, *tmp;
+
+ gst_event_parse_tag (event, &tl);
+ GST_DEBUG_OBJECT (pad, "tags %" GST_PTR_FORMAT, tl);
+ DISCO_LOCK (ps->dc);
+ /* If preroll is complete, drop these tags - the collected information is
+ * possibly already being processed and adding more tags would be racy */
+ if (G_LIKELY (ps->dc->priv->processing)) {
+ GST_DEBUG_OBJECT (pad, "private stream %p old tags %" GST_PTR_FORMAT, ps,
+ ps->tags);
+ tmp = gst_tag_list_merge (ps->tags, tl, GST_TAG_MERGE_APPEND);
+ if (ps->tags)
+ gst_tag_list_free (ps->tags);
+ ps->tags = tmp;
+ GST_DEBUG_OBJECT (pad, "private stream %p new tags %" GST_PTR_FORMAT, ps,
+ tmp);
+ } else
+ GST_DEBUG_OBJECT (pad, "Dropping tags since preroll is done");
+ DISCO_UNLOCK (ps->dc);
+ }
+
+ return TRUE;
+}
+
+static void
+uridecodebin_pad_added_cb (GstElement * uridecodebin, GstPad * pad,
+ GstDiscoverer * dc)
+{
+ PrivateStream *ps;
+ GstPad *sinkpad = NULL;
+ GstCaps *caps;
+ static GstCaps *subs_caps = NULL;
+
+ if (!subs_caps) {
+ subs_caps = gst_caps_from_string ("text/plain; text/x-pango-markup; "
+ "subpicture/x-pgs; subpicture/x-dvb; application/x-subtitle-unknown; "
+ "application/x-ssa; application/x-ass; subtitle/x-kate; "
+ "video/x-dvd-subpicture; ");
+ }
+
+ GST_DEBUG_OBJECT (dc, "pad %s:%s", GST_DEBUG_PAD_NAME (pad));
+
+ ps = g_slice_new0 (PrivateStream);
+
+ ps->dc = dc;
+ ps->pad = pad;
+ ps->queue = gst_element_factory_make ("queue", NULL);
+ ps->sink = gst_element_factory_make ("fakesink", NULL);
+
+ if (G_UNLIKELY (ps->queue == NULL || ps->sink == NULL))
+ goto error;
+
+ g_object_set (ps->sink, "silent", TRUE, NULL);
+ g_object_set (ps->queue, "max-size-buffers", 1, "silent", TRUE, NULL);
+
+ caps = gst_pad_get_caps_reffed (pad);
+
+ if (gst_caps_can_intersect (caps, subs_caps)) {
+ /* Subtitle streams are sparse and don't provide any information - don't
+ * wait for data to preroll */
+ g_object_set (ps->sink, "async", FALSE, NULL);
+ }
+
+ gst_caps_unref (caps);
+
+ gst_bin_add_many (dc->priv->pipeline, ps->queue, ps->sink, NULL);
+
+ if (!gst_element_link_pads_full (ps->queue, "src", ps->sink, "sink",
+ GST_PAD_LINK_CHECK_NOTHING))
+ goto error;
+ if (!gst_element_sync_state_with_parent (ps->sink))
+ goto error;
+ if (!gst_element_sync_state_with_parent (ps->queue))
+ goto error;
+
+ sinkpad = gst_element_get_static_pad (ps->queue, "sink");
+ if (sinkpad == NULL)
+ goto error;
+ if (gst_pad_link_full (pad, sinkpad,
+ GST_PAD_LINK_CHECK_NOTHING) != GST_PAD_LINK_OK)
+ goto error;
+ gst_object_unref (sinkpad);
+
+ /* Add an event probe */
+ gst_pad_add_event_probe (pad, G_CALLBACK (_event_probe), ps);
+
+ DISCO_LOCK (dc);
+ dc->priv->streams = g_list_append (dc->priv->streams, ps);
+ DISCO_UNLOCK (dc);
+
+ GST_DEBUG_OBJECT (dc, "Done handling pad");
+
+ return;
+
+error:
+ GST_ERROR_OBJECT (dc, "Error while handling pad");
+ if (sinkpad)
+ gst_object_unref (sinkpad);
+ if (ps->queue)
+ gst_object_unref (ps->queue);
+ if (ps->sink)
+ gst_object_unref (ps->sink);
+ g_slice_free (PrivateStream, ps);
+ return;
+}
+
+static void
+uridecodebin_pad_removed_cb (GstElement * uridecodebin, GstPad * pad,
+ GstDiscoverer * dc)
+{
+ GList *tmp;
+ PrivateStream *ps;
+ GstPad *sinkpad;
+
+ GST_DEBUG_OBJECT (dc, "pad %s:%s", GST_DEBUG_PAD_NAME (pad));
+
+ /* Find the PrivateStream */
+ DISCO_LOCK (dc);
+ for (tmp = dc->priv->streams; tmp; tmp = tmp->next) {
+ ps = (PrivateStream *) tmp->data;
+ if (ps->pad == pad)
+ break;
+ }
+
+ if (tmp == NULL) {
+ DISCO_UNLOCK (dc);
+ GST_DEBUG ("The removed pad wasn't controlled by us !");
+ return;
+ }
+
+ dc->priv->streams = g_list_delete_link (dc->priv->streams, tmp);
+ DISCO_UNLOCK (dc);
+
+ gst_element_set_state (ps->sink, GST_STATE_NULL);
+ gst_element_set_state (ps->queue, GST_STATE_NULL);
+ gst_element_unlink (ps->queue, ps->sink);
+
+ sinkpad = gst_element_get_static_pad (ps->queue, "sink");
+ gst_pad_unlink (pad, sinkpad);
+ gst_object_unref (sinkpad);
+
+ /* references removed here */
+ gst_bin_remove_many (dc->priv->pipeline, ps->sink, ps->queue, NULL);
+
+ if (ps->tags) {
+ gst_tag_list_free (ps->tags);
+ }
+
+ g_slice_free (PrivateStream, ps);
+
+ GST_DEBUG ("Done handling pad");
+}
+
+static GstStructure *
+collect_stream_information (GstDiscoverer * dc, PrivateStream * ps, guint idx)
+{
+ GstCaps *caps;
+ GstStructure *st;
+ gchar *stname;
+
+ stname = g_strdup_printf ("stream-%02d", idx);
+ st = gst_structure_empty_new (stname);
+ g_free (stname);
+
+ /* Get caps */
+ caps = gst_pad_get_negotiated_caps (ps->pad);
+ if (!caps) {
+ GST_WARNING ("Couldn't get negotiated caps from %s:%s",
+ GST_DEBUG_PAD_NAME (ps->pad));
+ caps = gst_pad_get_caps (ps->pad);
+ }
+ if (caps) {
+ GST_DEBUG ("Got caps %" GST_PTR_FORMAT, caps);
+ gst_structure_id_set (st, _CAPS_QUARK, GST_TYPE_CAPS, caps, NULL);
+
+ gst_caps_unref (caps);
+ }
+ if (ps->tags)
+ gst_structure_id_set (st, _TAGS_QUARK, GST_TYPE_STRUCTURE, ps->tags, NULL);
+
+ return st;
+}
+
+/* Parses a set of caps and tags in st and populates a GstDiscovererStreamInfo
+ * structure (parent, if !NULL, otherwise it allocates one)
+ */
+static GstDiscovererStreamInfo *
+collect_information (GstDiscoverer * dc, const GstStructure * st,
+ GstDiscovererStreamInfo * parent)
+{
+ GstCaps *caps;
+ GstStructure *caps_st, *tags_st;
+ const gchar *name;
+ int tmp, tmp2;
+ guint utmp;
+ gboolean btmp;
+
+ if (!st || !gst_structure_id_has_field (st, _CAPS_QUARK)) {
+ GST_WARNING ("Couldn't find caps !");
+ if (parent)
+ return parent;
+ else
+ return (GstDiscovererStreamInfo *)
+ gst_mini_object_new (GST_TYPE_DISCOVERER_STREAM_INFO);
+ }
+
+ gst_structure_id_get (st, _CAPS_QUARK, GST_TYPE_CAPS, &caps, NULL);
+ caps_st = gst_caps_get_structure (caps, 0);
+ name = gst_structure_get_name (caps_st);
+
+ if (g_str_has_prefix (name, "audio/")) {
+ GstDiscovererAudioInfo *info;
+
+ if (parent)
+ info = (GstDiscovererAudioInfo *) parent;
+ else {
+ info = (GstDiscovererAudioInfo *)
+ gst_mini_object_new (GST_TYPE_DISCOVERER_AUDIO_INFO);
+ info->parent.caps = caps;
+ }
+
+ if (gst_structure_get_int (caps_st, "rate", &tmp))
+ info->sample_rate = (guint) tmp;
+
+ if (gst_structure_get_int (caps_st, "channels", &tmp))
+ info->channels = (guint) tmp;
+
+ if (gst_structure_get_int (caps_st, "depth", &tmp))
+ info->depth = (guint) tmp;
+
+ if (gst_structure_id_has_field (st, _TAGS_QUARK)) {
+ gst_structure_id_get (st, _TAGS_QUARK,
+ GST_TYPE_STRUCTURE, &tags_st, NULL);
+ if (gst_structure_get_uint (tags_st, GST_TAG_BITRATE, &utmp) ||
+ gst_structure_get_uint (tags_st, GST_TAG_NOMINAL_BITRATE, &utmp))
+ info->bitrate = utmp;
+
+ if (gst_structure_get_uint (tags_st, GST_TAG_MAXIMUM_BITRATE, &utmp))
+ info->max_bitrate = utmp;
+
+ /* FIXME: Is it worth it to remove the tags we've parsed? */
+ info->parent.tags = gst_tag_list_merge (info->parent.tags,
+ (GstTagList *) tags_st, GST_TAG_MERGE_REPLACE);
+
+ gst_structure_free (tags_st);
+ }
+
+ return (GstDiscovererStreamInfo *) info;
+
+ } else if (g_str_has_prefix (name, "video/") ||
+ g_str_has_prefix (name, "image/")) {
+ GstDiscovererVideoInfo *info;
+ GstVideoFormat format;
+
+ if (parent)
+ info = (GstDiscovererVideoInfo *) parent;
+ else {
+ info = (GstDiscovererVideoInfo *)
+ gst_mini_object_new (GST_TYPE_DISCOVERER_VIDEO_INFO);
+ info->parent.caps = caps;
+ }
+
+ if (gst_video_format_parse_caps (caps, &format, &tmp, &tmp2)) {
+ info->width = (guint) tmp;
+ info->height = (guint) tmp2;
+ }
+
+ if (gst_structure_get_int (caps_st, "depth", &tmp))
+ info->depth = (guint) tmp;
+
+ if (gst_video_parse_caps_pixel_aspect_ratio (caps, &tmp, &tmp2)) {
+ info->par_num = tmp;
+ info->par_denom = tmp2;
+ }
+
+ if (gst_video_parse_caps_framerate (caps, &tmp, &tmp2)) {
+ info->framerate_num = tmp;
+ info->framerate_denom = tmp2;
+ }
+
+ if (gst_video_format_parse_caps_interlaced (caps, &btmp))
+ info->interlaced = btmp;
+
+ if (gst_structure_id_has_field (st, _TAGS_QUARK)) {
+ gst_structure_id_get (st, _TAGS_QUARK,
+ GST_TYPE_STRUCTURE, &tags_st, NULL);
+ if (gst_structure_get_uint (tags_st, GST_TAG_BITRATE, &utmp) ||
+ gst_structure_get_uint (tags_st, GST_TAG_NOMINAL_BITRATE, &utmp))
+ info->bitrate = utmp;
+
+ if (gst_structure_get_uint (tags_st, GST_TAG_MAXIMUM_BITRATE, &utmp))
+ info->max_bitrate = utmp;
+
+ /* FIXME: Is it worth it to remove the tags we've parsed? */
+ info->parent.tags = gst_tag_list_merge (info->parent.tags,
+ (GstTagList *) tags_st, GST_TAG_MERGE_REPLACE);
+ gst_structure_free (tags_st);
+ }
+
+ return (GstDiscovererStreamInfo *) info;
+
+ } else {
+ /* None of the above - populate what information we can */
+ GstDiscovererStreamInfo *info;
+
+ if (parent)
+ info = parent;
+ else {
+ info = (GstDiscovererStreamInfo *)
+ gst_mini_object_new (GST_TYPE_DISCOVERER_STREAM_INFO);
+ info->caps = caps;
+ }
+
+ if (gst_structure_id_get (st, _TAGS_QUARK,
+ GST_TYPE_STRUCTURE, &tags_st, NULL)) {
+ info->tags = gst_tag_list_merge (info->tags, (GstTagList *) tags_st,
+ GST_TAG_MERGE_REPLACE);
+ gst_structure_free (tags_st);
+ }
+
+ return info;
+ }
+
+}
+
+static GstStructure *
+find_stream_for_node (GstDiscoverer * dc, const GstStructure * topology)
+{
+ GstPad *pad;
+ GstPad *target_pad = NULL;
+ GstStructure *st = NULL;
+ PrivateStream *ps;
+ guint i;
+ GList *tmp;
+
+ if (!gst_structure_id_has_field (topology, _TOPOLOGY_PAD_QUARK)) {
+ GST_DEBUG ("Could not find pad for node %" GST_PTR_FORMAT "\n", topology);
+ return NULL;
+ }
+
+ gst_structure_id_get (topology, _TOPOLOGY_PAD_QUARK,
+ GST_TYPE_PAD, &pad, NULL);
+
+ if (!dc->priv->streams)
+ return NULL;
+
+ for (i = 0, tmp = dc->priv->streams; tmp; tmp = tmp->next, i++) {
+ ps = (PrivateStream *) tmp->data;
+
+ target_pad = gst_ghost_pad_get_target (GST_GHOST_PAD (ps->pad));
+ gst_object_unref (target_pad);
+
+ if (target_pad == pad)
+ break;
+ }
+
+ if (tmp)
+ st = collect_stream_information (dc, ps, i);
+
+ gst_object_unref (pad);
+
+ return st;
+}
+
+static gboolean
+child_is_raw_stream (GstCaps * parent, GstCaps * child)
+{
+ GstStructure *st1, *st2;
+ const gchar *name1, *name2;
+
+ st1 = gst_caps_get_structure (parent, 0);
+ name1 = gst_structure_get_name (st1);
+ st2 = gst_caps_get_structure (child, 0);
+ name2 = gst_structure_get_name (st2);
+
+ if ((g_str_has_prefix (name1, "audio/") &&
+ g_str_has_prefix (name2, "audio/x-raw")) ||
+ ((g_str_has_prefix (name1, "video/") ||
+ g_str_has_prefix (name1, "image/")) &&
+ g_str_has_prefix (name2, "video/x-raw"))) {
+ /* child is the "raw" sub-stream corresponding to parent */
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+/* If a parent is non-NULL, collected stream information will be appended to it
+ * (and where the information exists, it will be overriden)
+ */
+static GstDiscovererStreamInfo *
+parse_stream_topology (GstDiscoverer * dc, const GstStructure * topology,
+ GstDiscovererStreamInfo * parent)
+{
+ GstDiscovererStreamInfo *res = NULL;
+ GstCaps *caps = NULL;
+ const GValue *nval = NULL;
+
+ GST_DEBUG ("parsing: %" GST_PTR_FORMAT, topology);
+
+ nval = gst_structure_get_value (topology, "next");
+
+ if (nval == NULL || GST_VALUE_HOLDS_STRUCTURE (nval)) {
+ GstStructure *st = find_stream_for_node (dc, topology);
+ gboolean add_to_list = TRUE;
+
+ if (st) {
+ res = collect_information (dc, st, parent);
+ gst_structure_free (st);
+ } else {
+ /* Didn't find a stream structure, so let's just use the caps we have */
+ res = collect_information (dc, topology, parent);
+ }
+
+ if (nval == NULL) {
+ /* FIXME : aggregate with information from main streams */
+ GST_DEBUG ("Coudn't find 'next' ! might be the last entry");
+ } else {
+ GstCaps *caps;
+ const GstStructure *st;
+
+ st = gst_value_get_structure (nval);
+
+ GST_DEBUG ("next is a structure %" GST_PTR_FORMAT, st);
+
+ if (!parent)
+ parent = res;
+
+ if (gst_structure_id_get (st, _CAPS_QUARK, GST_TYPE_CAPS, &caps, NULL)) {
+ if (gst_caps_can_intersect (parent->caps, caps)) {
+ /* We sometimes get an extra sub-stream from the parser. If this is
+ * the case, we just replace the parent caps with this stream's caps
+ * since they might contain more information */
+ gst_caps_unref (parent->caps);
+ parent->caps = caps;
+
+ parse_stream_topology (dc, st, parent);
+ add_to_list = FALSE;
+
+ } else if (child_is_raw_stream (parent->caps, caps)) {
+ /* This is the "raw" stream corresponding to the parent. This
+ * contains more information than the parent, tags etc. */
+ parse_stream_topology (dc, st, parent);
+ add_to_list = FALSE;
+ gst_caps_unref (caps);
+
+ } else {
+ GstDiscovererStreamInfo *next = parse_stream_topology (dc, st, NULL);
+ res->next = next;
+ next->previous = res;
+ }
+ }
+ }
+
+ if (add_to_list) {
+ dc->priv->current_info->stream_list =
+ g_list_append (dc->priv->current_info->stream_list, res);
+ }
+
+ } else if (GST_VALUE_HOLDS_LIST (nval)) {
+ guint i, len;
+ GstDiscovererContainerInfo *cont;
+ GstTagList *tags;
+
+ if (!gst_structure_id_get (topology, _CAPS_QUARK,
+ GST_TYPE_CAPS, &caps, NULL))
+ GST_WARNING ("Couldn't find caps !");
+
+ len = gst_value_list_get_size (nval);
+ GST_DEBUG ("next is a list of %d entries", len);
+
+ cont = (GstDiscovererContainerInfo *)
+ gst_mini_object_new (GST_TYPE_DISCOVERER_CONTAINER_INFO);
+ cont->parent.caps = caps;
+ res = (GstDiscovererStreamInfo *) cont;
+
+ if (gst_structure_id_has_field (topology, _TAGS_QUARK)) {
+ GstTagList *tmp;
+
+ gst_structure_id_get (topology, _TAGS_QUARK,
+ GST_TYPE_STRUCTURE, &tags, NULL);
+
+ GST_DEBUG ("Merge tags %" GST_PTR_FORMAT, tags);
+
+ tmp =
+ gst_tag_list_merge (cont->parent.tags, (GstTagList *) tags,
+ GST_TAG_MERGE_APPEND);
+ gst_tag_list_free (tags);
+ if (cont->parent.tags)
+ gst_tag_list_free (cont->parent.tags);
+ cont->parent.tags = tmp;
+ GST_DEBUG ("Container info tags %" GST_PTR_FORMAT, tmp);
+ }
+
+ for (i = 0; i < len; i++) {
+ const GValue *subv = gst_value_list_get_value (nval, i);
+ const GstStructure *subst = gst_value_get_structure (subv);
+ GstDiscovererStreamInfo *substream;
+
+ GST_DEBUG ("%d %" GST_PTR_FORMAT, i, subst);
+
+ substream = parse_stream_topology (dc, subst, NULL);
+
+ substream->previous = res;
+ cont->streams =
+ g_list_append (cont->streams,
+ gst_discoverer_stream_info_ref (substream));
+ }
+ }
+
+ return res;
+}
+
+/* Called when pipeline is pre-rolled */
+static void
+discoverer_collect (GstDiscoverer * dc)
+{
+ GST_DEBUG ("Collecting information");
+
+ /* Stop the timeout handler if present */
+ if (dc->priv->timeoutid) {
+ g_source_remove (dc->priv->timeoutid);
+ dc->priv->timeoutid = 0;
+ }
+
+ if (dc->priv->streams) {
+ /* FIXME : Make this querying optional */
+ if (TRUE) {
+ GstElement *pipeline = (GstElement *) dc->priv->pipeline;
+ GstFormat format = GST_FORMAT_TIME;
+ gint64 dur;
+
+ GST_DEBUG ("Attempting to query duration");
+
+ if (gst_element_query_duration (pipeline, &format, &dur)) {
+ if (format == GST_FORMAT_TIME) {
+ GST_DEBUG ("Got duration %" GST_TIME_FORMAT, GST_TIME_ARGS (dur));
+ dc->priv->current_info->duration = (guint64) dur;
+ }
+ }
+
+ if (dc->priv->seeking_query) {
+ if (gst_element_query (pipeline, dc->priv->seeking_query)) {
+ gboolean seekable;
+
+ gst_query_parse_seeking (dc->priv->seeking_query, &format,
+ &seekable, NULL, NULL);
+ if (format == GST_FORMAT_TIME) {
+ GST_DEBUG ("Got seekable %d", seekable);
+ dc->priv->current_info->seekable = seekable;
+ }
+ }
+ }
+ }
+
+ if (dc->priv->current_topology)
+ dc->priv->current_info->stream_info = parse_stream_topology (dc,
+ dc->priv->current_topology, NULL);
+
+ /*
+ * Images need some special handling. They do not have a duration, have
+ * caps named image/<foo> (th exception being MJPEG video which is also
+ * type image/jpeg), and should consist of precisely one stream (actually
+ * initially there are 2, the image and raw stream, but we squash these
+ * while parsing the stream topology). At some ponit, if we find that these
+ * conditions are not sufficient, we can count the number of decoders and
+ * parsers in the chain, and if there's more than one decoder, or any
+ * parser at all, we should not mark this as an image.
+ */
+ if (dc->priv->current_info->duration == 0 &&
+ dc->priv->current_info->stream_info != NULL &&
+ dc->priv->current_info->stream_info->next == NULL) {
+ GstStructure *st =
+ gst_caps_get_structure (dc->priv->current_info->stream_info->caps, 0);
+
+ if (g_str_has_prefix (gst_structure_get_name (st), "image/"))
+ ((GstDiscovererVideoInfo *) dc->priv->current_info->
+ stream_info)->is_image = TRUE;
+ }
+ }
+
+ if (dc->priv->async) {
+ GST_DEBUG ("Emitting 'discoverered'");
+ g_signal_emit (dc, gst_discoverer_signals[SIGNAL_DISCOVERED], 0,
+ dc->priv->current_info, dc->priv->current_error);
+ /* Clients get a copy of current_info since it is a boxed type */
+ gst_discoverer_info_unref (dc->priv->current_info);
+ }
+}
+
+static void
+get_async_cb (gpointer cb_data, GSource * source, GSourceFunc * func,
+ gpointer * data)
+{
+ *func = (GSourceFunc) async_timeout_cb;
+ *data = cb_data;
+}
+
+/* Wrapper since GSourceCallbackFuncs don't expect a return value from ref() */
+static void
+_void_g_object_ref (gpointer object)
+{
+ g_object_ref (G_OBJECT (object));
+}
+
+static void
+handle_current_async (GstDiscoverer * dc)
+{
+ GSource *source;
+ static GSourceCallbackFuncs cb_funcs = {
+ .ref = _void_g_object_ref,
+ .unref = g_object_unref,
+ .get = get_async_cb,
+ };
+
+ /* Attach a timeout to the main context */
+ source = g_timeout_source_new (dc->priv->timeout / GST_MSECOND);
+ g_source_set_callback_indirect (source, g_object_ref (dc), &cb_funcs);
+ dc->priv->timeoutid = g_source_attach (source, dc->priv->ctx);
+ g_source_unref (source);
+}
+
+
+/* Returns TRUE if processing should stop */
+static gboolean
+handle_message (GstDiscoverer * dc, GstMessage * msg)
+{
+ gboolean done = FALSE;
+
+ GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "got a %s message",
+ GST_MESSAGE_TYPE_NAME (msg));
+
+ switch (GST_MESSAGE_TYPE (msg)) {
+ case GST_MESSAGE_ERROR:{
+ GError *gerr;
+ gchar *debug;
+
+ gst_message_parse_error (msg, &gerr, &debug);
+ GST_WARNING_OBJECT (GST_MESSAGE_SRC (msg),
+ "Got an error [debug:%s], [message:%s]", debug, gerr->message);
+ dc->priv->current_error = gerr;
+ g_free (debug);
+
+ /* We need to stop */
+ done = TRUE;
+
+ GST_DEBUG ("Setting result to ERROR");
+ dc->priv->current_info->result = GST_DISCOVERER_ERROR;
+ }
+ break;
+
+ case GST_MESSAGE_EOS:
+ GST_DEBUG ("Got EOS !");
+ done = TRUE;
+ break;
+
+ case GST_MESSAGE_ASYNC_DONE:
+ if (GST_MESSAGE_SRC (msg) == (GstObject *) dc->priv->pipeline) {
+ GST_DEBUG ("Finished changing state asynchronously");
+ done = TRUE;
+
+ }
+ break;
+
+ case GST_MESSAGE_ELEMENT:
+ {
+ GQuark sttype = gst_structure_get_name_id (msg->structure);
+ GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg),
+ "structure %" GST_PTR_FORMAT, msg->structure);
+ if (sttype == _MISSING_PLUGIN_QUARK) {
+ GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg),
+ "Setting result to MISSING_PLUGINS");
+ dc->priv->current_info->result = GST_DISCOVERER_MISSING_PLUGINS;
+ dc->priv->current_info->misc = gst_structure_copy (msg->structure);
+ } else if (sttype == _STREAM_TOPOLOGY_QUARK) {
+ dc->priv->current_topology = gst_structure_copy (msg->structure);
+ }
+ }
+ break;
+
+ case GST_MESSAGE_TAG:
+ {
+ GstTagList *tl, *tmp;
+
+ gst_message_parse_tag (msg, &tl);
+ GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "Got tags %" GST_PTR_FORMAT, tl);
+ /* Merge with current tags */
+ tmp =
+ gst_tag_list_merge (dc->priv->current_info->tags, tl,
+ GST_TAG_MERGE_APPEND);
+ gst_tag_list_free (tl);
+ if (dc->priv->current_info->tags)
+ gst_tag_list_free (dc->priv->current_info->tags);
+ dc->priv->current_info->tags = tmp;
+ GST_DEBUG_OBJECT (GST_MESSAGE_SRC (msg), "Current info %p, tags %"
+ GST_PTR_FORMAT, dc->priv->current_info, tmp);
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ return done;
+}
+
+
+static void
+handle_current_sync (GstDiscoverer * dc)
+{
+ GTimer *timer;
+ gdouble deadline = ((gdouble) dc->priv->timeout) / GST_SECOND;
+ GstMessage *msg;
+ gboolean done = FALSE;
+
+ timer = g_timer_new ();
+ g_timer_start (timer);
+
+ do {
+ /* poll bus with timeout */
+ /* FIXME : make the timeout more fine-tuned */
+ if ((msg = gst_bus_timed_pop (dc->priv->bus, GST_SECOND / 2))) {
+ done = handle_message (dc, msg);
+ gst_message_unref (msg);
+ }
+
+ } while (!done && (g_timer_elapsed (timer, NULL) < deadline));
+
+ /* return result */
+ if (!done) {
+ GST_DEBUG ("we timed out! Setting result to TIMEOUT");
+ dc->priv->current_info->result = GST_DISCOVERER_TIMEOUT;
+ }
+
+ GST_DEBUG ("Done");
+
+ g_timer_stop (timer);
+ g_timer_destroy (timer);
+}
+
+static void
+_setup_locked (GstDiscoverer * dc)
+{
+ GstStateChangeReturn ret;
+
+ GST_DEBUG ("Setting up");
+
+ /* Pop URI off the pending URI list */
+ dc->priv->current_info =
+ (GstDiscovererInfo *) gst_mini_object_new (GST_TYPE_DISCOVERER_INFO);
+ dc->priv->current_info->uri = (gchar *) dc->priv->pending_uris->data;
+ dc->priv->pending_uris =
+ g_list_delete_link (dc->priv->pending_uris, dc->priv->pending_uris);
+
+ /* set uri on uridecodebin */
+ g_object_set (dc->priv->uridecodebin, "uri", dc->priv->current_info->uri,
+ NULL);
+
+ GST_DEBUG ("Current is now %s", dc->priv->current_info->uri);
+
+ dc->priv->processing = TRUE;
+
+ /* set pipeline to PAUSED */
+ DISCO_UNLOCK (dc);
+ GST_DEBUG ("Setting pipeline to PAUSED");
+ ret =
+ gst_element_set_state ((GstElement *) dc->priv->pipeline,
+ GST_STATE_PAUSED);
+ DISCO_LOCK (dc);
+
+ GST_DEBUG_OBJECT (dc, "Pipeline going to PAUSED : %s",
+ gst_element_state_change_return_get_name (ret));
+}
+
+static void
+discoverer_cleanup (GstDiscoverer * dc)
+{
+ GST_DEBUG ("Cleaning up");
+
+ gst_bus_set_flushing (dc->priv->bus, TRUE);
+ gst_element_set_state ((GstElement *) dc->priv->pipeline, GST_STATE_READY);
+ gst_bus_set_flushing (dc->priv->bus, FALSE);
+
+ DISCO_LOCK (dc);
+ if (dc->priv->current_error)
+ g_error_free (dc->priv->current_error);
+ dc->priv->current_error = NULL;
+ if (dc->priv->current_topology) {
+ gst_structure_free (dc->priv->current_topology);
+ dc->priv->current_topology = NULL;
+ }
+
+ dc->priv->current_info = NULL;
+
+ /* Try popping the next uri */
+ if (dc->priv->async) {
+ if (dc->priv->pending_uris != NULL) {
+ _setup_locked (dc);
+ DISCO_UNLOCK (dc);
+ /* Start timeout */
+ handle_current_async (dc);
+ } else {
+ /* We're done ! */
+ DISCO_UNLOCK (dc);
+ g_signal_emit (dc, gst_discoverer_signals[SIGNAL_FINISHED], 0);
+ }
+ } else
+ DISCO_UNLOCK (dc);
+
+ GST_DEBUG ("out");
+}
+
+static void
+discoverer_bus_cb (GstBus * bus, GstMessage * msg, GstDiscoverer * dc)
+{
+ if (dc->priv->processing) {
+ if (handle_message (dc, msg)) {
+ GST_DEBUG ("Stopping asynchronously");
+ /* Serialise with _event_probe() */
+ DISCO_LOCK (dc);
+ dc->priv->processing = FALSE;
+ DISCO_UNLOCK (dc);
+ discoverer_collect (dc);
+ discoverer_cleanup (dc);
+ }
+ }
+}
+
+static gboolean
+async_timeout_cb (GstDiscoverer * dc)
+{
+ if (!g_source_is_destroyed (g_main_current_source ())) {
+ dc->priv->timeoutid = 0;
+ GST_DEBUG ("Setting result to TIMEOUT");
+ dc->priv->current_info->result = GST_DISCOVERER_TIMEOUT;
+ dc->priv->processing = FALSE;
+ discoverer_collect (dc);
+ discoverer_cleanup (dc);
+ }
+ return FALSE;
+}
+
+/* If there is a pending URI, it will pop it from the list of pending
+ * URIs and start the discovery on it.
+ *
+ * Returns GST_DISCOVERER_OK if the next URI was popped and is processing,
+ * else a error flag.
+ */
+static GstDiscovererResult
+start_discovering (GstDiscoverer * dc)
+{
+ GstDiscovererResult res = GST_DISCOVERER_OK;
+
+ GST_DEBUG ("Starting");
+
+ DISCO_LOCK (dc);
+ if (dc->priv->pending_uris == NULL) {
+ GST_WARNING ("No URI to process");
+ res = GST_DISCOVERER_URI_INVALID;
+ DISCO_UNLOCK (dc);
+ goto beach;
+ }
+
+ if (dc->priv->current_info != NULL) {
+ GST_WARNING ("Already processing a file");
+ res = GST_DISCOVERER_BUSY;
+ DISCO_UNLOCK (dc);
+ goto beach;
+ }
+
+ g_signal_emit (dc, gst_discoverer_signals[SIGNAL_STARTING], 0);
+
+ _setup_locked (dc);
+
+ DISCO_UNLOCK (dc);
+
+ if (dc->priv->async)
+ handle_current_async (dc);
+ else
+ handle_current_sync (dc);
+
+beach:
+ return res;
+}
+
+
+/**
+ * gst_discoverer_start:
+ * @discoverer: A #GstDiscoverer
+ *
+ * Allow asynchronous discovering of URIs to take place.
+ * A #GMainLoop must be available for #GstDiscoverer to properly work in
+ * asynchronous mode.
+ *
+ * Since: 0.10.31
+ */
+void
+gst_discoverer_start (GstDiscoverer * discoverer)
+{
+ GSource *source;
+ GMainContext *ctx = NULL;
+
+ GST_DEBUG_OBJECT (discoverer, "Starting...");
+
+ if (discoverer->priv->async) {
+ GST_DEBUG_OBJECT (discoverer, "We were already started");
+ return;
+ }
+
+ discoverer->priv->async = TRUE;
+ discoverer->priv->running = TRUE;
+
+ ctx = g_main_context_get_thread_default ();
+
+ /* Connect to bus signals */
+ if (ctx == NULL)
+ ctx = g_main_context_default ();
+
+ source = gst_bus_create_watch (discoverer->priv->bus);
+ g_source_set_callback (source, (GSourceFunc) gst_bus_async_signal_func,
+ NULL, NULL);
+ discoverer->priv->sourceid = g_source_attach (source, ctx);
+ g_source_unref (source);
+ discoverer->priv->ctx = g_main_context_ref (ctx);
+
+ start_discovering (discoverer);
+ GST_DEBUG_OBJECT (discoverer, "Started");
+}
+
+/**
+ * gst_discoverer_stop:
+ * @discoverer: A #GstDiscoverer
+ *
+ * Stop the discovery of any pending URIs and clears the list of
+ * pending URIS (if any).
+ *
+ * Since: 0.10.31
+ */
+void
+gst_discoverer_stop (GstDiscoverer * discoverer)
+{
+ GST_DEBUG_OBJECT (discoverer, "Stopping...");
+
+ if (!discoverer->priv->async) {
+ GST_DEBUG_OBJECT (discoverer,
+ "We were already stopped, or running synchronously");
+ return;
+ }
+
+ DISCO_LOCK (discoverer);
+ if (discoverer->priv->processing) {
+ /* We prevent any further processing by setting the bus to
+ * flushing and setting the pipeline to READY.
+ * _reset() will take care of the rest of the cleanup */
+ if (discoverer->priv->bus)
+ gst_bus_set_flushing (discoverer->priv->bus, TRUE);
+ if (discoverer->priv->pipeline)
+ gst_element_set_state ((GstElement *) discoverer->priv->pipeline,
+ GST_STATE_READY);
+ }
+ discoverer->priv->running = FALSE;
+ DISCO_UNLOCK (discoverer);
+
+ /* Remove timeout handler */
+ if (discoverer->priv->timeoutid) {
+ g_source_remove (discoverer->priv->timeoutid);
+ discoverer->priv->timeoutid = 0;
+ }
+ /* Remove signal watch */
+ if (discoverer->priv->sourceid) {
+ g_source_remove (discoverer->priv->sourceid);
+ discoverer->priv->sourceid = 0;
+ }
+ /* Unref main context */
+ if (discoverer->priv->ctx) {
+ g_main_context_unref (discoverer->priv->ctx);
+ discoverer->priv->ctx = NULL;
+ }
+ discoverer_reset (discoverer);
+
+ discoverer->priv->async = FALSE;
+
+ GST_DEBUG_OBJECT (discoverer, "Stopped");
+}
+
+/**
+ * gst_discoverer_discover_uri_async:
+ * @discoverer: A #GstDiscoverer
+ * @uri: the URI to add.
+ *
+ * Appends the given @uri to the list of URIs to discoverer. The actual
+ * discovery of the @uri will only take place if gst_discoverer_start() has
+ * been called.
+ *
+ * A copy of @uri will be made internally, so the caller can safely g_free()
+ * afterwards.
+ *
+ * Returns: %TRUE if the @uri was succesfully appended to the list of pending
+ * uris, else %FALSE
+ *
+ * Since: 0.10.31
+ */
+gboolean
+gst_discoverer_discover_uri_async (GstDiscoverer * discoverer,
+ const gchar * uri)
+{
+ gboolean can_run;
+
+ GST_DEBUG_OBJECT (discoverer, "uri : %s", uri);
+
+ DISCO_LOCK (discoverer);
+ can_run = (discoverer->priv->pending_uris == NULL);
+ discoverer->priv->pending_uris =
+ g_list_append (discoverer->priv->pending_uris, g_strdup (uri));
+ DISCO_UNLOCK (discoverer);
+
+ if (can_run)
+ start_discovering (discoverer);
+
+ return TRUE;
+}
+
+
+/* Synchronous mode */
+/**
+ * gst_discoverer_discover_uri:
+ * @discoverer: A #GstDiscoverer
+ * @uri: The URI to run on.
+ * @err: If an error occurred, this field will be filled in.
+ *
+ * Synchronously discovers the given @uri.
+ *
+ * A copy of @uri will be made internally, so the caller can safely g_free()
+ * afterwards.
+ *
+ * Returns: (transfer full): the result of the scanning. Can be %NULL if an
+ * error occurred.
+ *
+ * Since: 0.10.31
+ */
+GstDiscovererInfo *
+gst_discoverer_discover_uri (GstDiscoverer * discoverer, const gchar * uri,
+ GError ** err)
+{
+ GstDiscovererResult res = 0;
+ GstDiscovererInfo *info;
+
+ GST_DEBUG_OBJECT (discoverer, "uri:%s", uri);
+
+ DISCO_LOCK (discoverer);
+ if (G_UNLIKELY (discoverer->priv->current_info)) {
+ DISCO_UNLOCK (discoverer);
+ GST_WARNING_OBJECT (discoverer, "Already handling a uri");
+ return NULL;
+ }
+
+ discoverer->priv->pending_uris =
+ g_list_append (discoverer->priv->pending_uris, g_strdup (uri));
+ DISCO_UNLOCK (discoverer);
+
+ res = start_discovering (discoverer);
+ discoverer_collect (discoverer);
+
+ /* Get results */
+ if (discoverer->priv->current_error)
+ *err = g_error_copy (discoverer->priv->current_error);
+ else
+ *err = NULL;
+ if (res != GST_DISCOVERER_OK) {
+ GST_DEBUG ("Setting result to %d (was %d)", res,
+ discoverer->priv->current_info->result);
+ discoverer->priv->current_info->result = res;
+ }
+ info = discoverer->priv->current_info;
+
+ discoverer_cleanup (discoverer);
+
+ return info;
+}
+
+/**
+ * gst_discoverer_new:
+ * @timeout: timeout per file, in nanoseconds. Allowed are values between
+ * one second (#GST_SECOND) and one hour (3600 * #GST_SECOND)
+ * @err: a pointer to a #GError. can be %NULL
+ *
+ * Creates a new #GstDiscoverer with the provided timeout.
+ *
+ * Returns: (transfer full): The new #GstDiscoverer.
+ * If an error occurred when creating the discoverer, @err will be set
+ * accordingly and %NULL will be returned. If @err is set, the caller must
+ * free it when no longer needed using g_error_free().
+ *
+ * Since: 0.10.31
+ */
+GstDiscoverer *
+gst_discoverer_new (GstClockTime timeout, GError ** err)
+{
+ GstDiscoverer *res;
+
+ res = g_object_new (GST_TYPE_DISCOVERER, "timeout", timeout, NULL);
+ if (res->priv->uridecodebin == NULL) {
+ if (err)
+ *err = g_error_new (GST_CORE_ERROR, GST_CORE_ERROR_MISSING_PLUGIN,
+ "Couldn't create 'uridecodebin' element");
+ gst_object_unref (res);
+ res = NULL;
+ }
+ return res;
+}
projects / mafwsubrenderer / blobdiff