/* GStreamer * Copyright (C) <2007> Wim Taymans * * 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:element-uridecodebin * @short_description: decoder for an uri * * Decodes data from a URI into raw media. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #define GST_TYPE_URI_DECODE_BIN \ (gst_uri_decode_bin_get_type()) #define GST_URI_DECODE_BIN(obj) \ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_URI_DECODE_BIN,GstURIDecodeBin)) #define GST_URI_DECODE_BIN_CLASS(klass) \ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_URI_DECODE_BIN,GstURIDecodeBinClass)) #define GST_IS_URI_DECODE_BIN(obj) \ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_URI_DECODE_BIN)) #define GST_IS_URI_DECODE_BIN_CLASS(klass) \ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_URI_DECODE_BIN)) typedef struct _GstURIDecodeBin GstURIDecodeBin; typedef struct _GstURIDecodeBinClass GstURIDecodeBinClass; struct _GstURIDecodeBin { GstBin parent_instance; gchar *uri; gboolean is_stream; GstElement *source; GstElement *queue; GSList *decoders; GSList *srcpads; gint numpads; /* for dynamic sources */ guint src_np_sig_id; /* new-pad signal id */ guint src_nmp_sig_id; /* no-more-pads signal id */ gint pending; }; struct _GstURIDecodeBinClass { GstBinClass parent_class; }; static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src%d", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS_ANY); GST_DEBUG_CATEGORY_STATIC (gst_uri_decode_bin_debug); #define GST_CAT_DEFAULT gst_uri_decode_bin_debug static const GstElementDetails gst_uri_decode_bin_details = GST_ELEMENT_DETAILS ("URI Decoder", "Generic/Bin/Decoder", "Autoplug and decode an URI to raw media", "Wim Taymans "); #define DEFAULT_PROP_URI NULL enum { PROP_0, PROP_URI, PROP_LAST }; GST_BOILERPLATE (GstURIDecodeBin, gst_uri_decode_bin, GstBin, GST_TYPE_BIN); static void gst_uri_decode_bin_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_uri_decode_bin_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_uri_decode_bin_finalize (GObject * obj); static gboolean gst_uri_decode_bin_query (GstElement * element, GstQuery * query); static GstStateChangeReturn gst_uri_decode_bin_change_state (GstElement * element, GstStateChange transition); static void gst_uri_decode_bin_base_init (gpointer g_class) { GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&srctemplate)); gst_element_class_set_details (gstelement_class, &gst_uri_decode_bin_details); } static void gst_uri_decode_bin_class_init (GstURIDecodeBinClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; GstBinClass *gstbin_class; gobject_class = G_OBJECT_CLASS (klass); gstelement_class = GST_ELEMENT_CLASS (klass); gstbin_class = GST_BIN_CLASS (klass); gobject_class->set_property = gst_uri_decode_bin_set_property; gobject_class->get_property = gst_uri_decode_bin_get_property; gobject_class->finalize = gst_uri_decode_bin_finalize; g_object_class_install_property (gobject_class, PROP_URI, g_param_spec_string ("uri", "URI", "URI to decode", DEFAULT_PROP_URI, G_PARAM_READWRITE)); GST_DEBUG_CATEGORY_INIT (gst_uri_decode_bin_debug, "uridecodebin", 0, "URI decoder element"); gstelement_class->query = GST_DEBUG_FUNCPTR (gst_uri_decode_bin_query); gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_uri_decode_bin_change_state); } static void gst_uri_decode_bin_init (GstURIDecodeBin * dec, GstURIDecodeBinClass * klass) { dec->uri = g_strdup (DEFAULT_PROP_URI); } static void gst_uri_decode_bin_finalize (GObject * obj) { GstURIDecodeBin *dec = GST_URI_DECODE_BIN (obj); g_free (dec->uri); dec->uri = NULL; G_OBJECT_CLASS (parent_class)->finalize (obj); } static void gst_uri_decode_bin_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstURIDecodeBin *dec = GST_URI_DECODE_BIN (object); switch (prop_id) { case PROP_URI: g_free (dec->uri); dec->uri = g_value_dup_string (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_uri_decode_bin_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstURIDecodeBin *dec = GST_URI_DECODE_BIN (object); switch (prop_id) { case PROP_URI: g_value_set_string (value, dec->uri); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } #define DEFAULT_QUEUE_SIZE (3 * GST_SECOND) #define DEFAULT_QUEUE_MIN_THRESHOLD ((DEFAULT_QUEUE_SIZE * 30) / 100) #define DEFAULT_QUEUE_THRESHOLD ((DEFAULT_QUEUE_SIZE * 95) / 100) static void unknown_type (GstElement * element, GstPad * pad, GstCaps * caps, GstURIDecodeBin * decoder) { gchar *capsstr; capsstr = gst_caps_to_string (caps); GST_ELEMENT_WARNING (decoder, STREAM, WRONG_TYPE, (_("No decoder available for type \'%s\'."), capsstr), (NULL)); g_free (capsstr); } /* add a streaminfo that indicates that the stream is handled by the * given element. This usually means that a stream without actual data is * produced but one that is sunken by an element. Examples of this are: * cdaudio, a hardware decoder/sink, dvd meta bins etc... */ static void add_element_stream (GstElement * element, GstURIDecodeBin * decoder) { g_warning ("add element stream"); } /* when the decoder element signals that no more pads will be generated, we * can commit the current group. */ static void no_more_pads_full (GstElement * element, gboolean subs, GstURIDecodeBin * decoder) { gboolean final; /* setup phase */ GST_DEBUG_OBJECT (element, "no more pads, %d pending", decoder->pending); GST_OBJECT_LOCK (decoder); final = (decoder->pending == 0); /* nothing pending, we can exit */ if (final) goto done; /* the object has no pending no_more_pads */ if (!g_object_get_data (G_OBJECT (element), "pending")) goto done; g_object_set_data (G_OBJECT (element), "pending", NULL); decoder->pending--; if (decoder->pending != 0) final = FALSE; done: GST_OBJECT_UNLOCK (decoder); if (final) gst_element_no_more_pads (GST_ELEMENT_CAST (decoder)); return; } static void no_more_pads (GstElement * element, GstURIDecodeBin * decoder) { no_more_pads_full (element, FALSE, decoder); } static void source_no_more_pads (GstElement * element, GstURIDecodeBin * bin) { GST_DEBUG_OBJECT (bin, "No more pads in source element %s.", GST_ELEMENT_NAME (element)); g_signal_handler_disconnect (G_OBJECT (element), bin->src_np_sig_id); bin->src_np_sig_id = 0; g_signal_handler_disconnect (G_OBJECT (element), bin->src_nmp_sig_id); bin->src_nmp_sig_id = 0; no_more_pads_full (element, FALSE, bin); } /* Called by the signal handlers when a decodebin has * found a new raw pad. */ static void new_decoded_pad (GstElement * element, GstPad * pad, gboolean last, GstURIDecodeBin * decoder) { GstPad *newpad; gchar *padname; GST_DEBUG_OBJECT (element, "new decoded pad, name: <%s>. Last: %d", GST_PAD_NAME (pad), last); GST_OBJECT_LOCK (decoder); padname = g_strdup_printf ("src%d", decoder->numpads); decoder->numpads++; GST_OBJECT_UNLOCK (decoder); newpad = gst_ghost_pad_new (padname, pad); g_free (padname); gst_pad_set_active (newpad, TRUE); gst_element_add_pad (GST_ELEMENT_CAST (decoder), newpad); } /* helper function to lookup stuff in lists */ static gboolean array_has_value (const gchar * values[], const gchar * value) { gint i; for (i = 0; values[i]; i++) { if (g_str_has_prefix (value, values[i])) return TRUE; } return FALSE; } /* list of URIs that we consider to be streams and that need buffering. * We have no mechanism yet to figure this out with a query. */ static const gchar *stream_uris[] = { "http://", "mms://", "mmsh://", "mmsu://", "mmst://", NULL }; /* blacklisted URIs, we know they will always fail. */ static const gchar *blacklisted_uris[] = { NULL }; /* mime types that we don't consider to be media types */ #if 0 static const gchar *no_media_mimes[] = { "application/x-executable", "application/x-bzip", "application/x-gzip", "application/zip", "application/x-compress", NULL }; #endif /* mime types we consider raw media */ static const gchar *raw_mimes[] = { "audio/x-raw", "video/x-raw", NULL }; #define IS_STREAM_URI(uri) (array_has_value (stream_uris, uri)) #define IS_BLACKLISTED_URI(uri) (array_has_value (blacklisted_uris, uri)) #define IS_NO_MEDIA_MIME(mime) (array_has_value (no_media_mimes, mime)) #define IS_RAW_MIME(mime) (array_has_value (raw_mimes, mime)) /* * Generate and configure a source element. */ static GstElement * gen_source_element (GstURIDecodeBin * decoder) { GstElement *source; if (!decoder->uri) goto no_uri; if (!gst_uri_is_valid (decoder->uri)) goto invalid_uri; if (IS_BLACKLISTED_URI (decoder->uri)) goto uri_blacklisted; source = gst_element_make_from_uri (GST_URI_SRC, decoder->uri, "source"); if (!source) goto no_source; decoder->is_stream = IS_STREAM_URI (decoder->uri); /* make HTTP sources send extra headers so we get icecast * metadata in case the stream is an icecast stream */ if (!strncmp (decoder->uri, "http://", 7) && g_object_class_find_property (G_OBJECT_GET_CLASS (source), "iradio-mode")) { g_object_set (source, "iradio-mode", TRUE, NULL); } return source; /* ERRORS */ no_uri: { GST_ELEMENT_ERROR (decoder, RESOURCE, NOT_FOUND, (_("No URI specified to play from.")), (NULL)); return NULL; } invalid_uri: { GST_ELEMENT_ERROR (decoder, RESOURCE, NOT_FOUND, (_("Invalid URI \"%s\"."), decoder->uri), (NULL)); return NULL; } uri_blacklisted: { GST_ELEMENT_ERROR (decoder, RESOURCE, FAILED, (_("This stream type cannot be played yet.")), (NULL)); return NULL; } no_source: { gchar *prot = gst_uri_get_protocol (decoder->uri); /* whoops, could not create the source element, dig a little deeper to * figure out what might be wrong. */ if (prot) { GST_ELEMENT_ERROR (decoder, RESOURCE, FAILED, (_("No URI handler implemented for \"%s\"."), prot), (NULL)); g_free (prot); } else goto invalid_uri; return NULL; } } /** * has_all_raw_caps: * @pad: a #GstPad * @all_raw: pointer to hold the result * * check if the caps of the pad are all raw. The caps are all raw if * all of its structures contain audio/x-raw or video/x-raw. * * Returns: %FALSE @pad has no caps. Else TRUE and @all_raw set t the result. */ static gboolean has_all_raw_caps (GstPad * pad, gboolean * all_raw) { GstCaps *caps; gint capssize; guint i, num_raw = 0; gboolean res = FALSE; caps = gst_pad_get_caps (pad); if (caps == NULL) return FALSE; capssize = gst_caps_get_size (caps); /* no caps, skip and move to the next pad */ if (capssize == 0 || gst_caps_is_empty (caps) || gst_caps_is_any (caps)) goto done; /* count the number of raw formats in the caps */ for (i = 0; i < capssize; ++i) { GstStructure *s; const gchar *mime_type; s = gst_caps_get_structure (caps, i); mime_type = gst_structure_get_name (s); if (IS_RAW_MIME (mime_type)) ++num_raw; } *all_raw = (num_raw == capssize); res = TRUE; done: gst_caps_unref (caps); return res; } /** * analyse_source: * @decoder: a #GstURIDecodeBin * @is_raw: are all pads raw data * @have_out: does the source have output * @is_dynamic: is this a dynamic source * * Check the source of @decoder and collect information about it. * * @is_raw will be set to TRUE if the source only produces raw pads. When this * function returns, all of the raw pad of the source will be added * to @decoder. * * @have_out: will be set to TRUE if the source has output pads. * * @is_dynamic: TRUE if the element will create (more) pads dynamically later * on. * * Returns: FALSE if a fatal error occured while scanning. */ static gboolean analyse_source (GstURIDecodeBin * decoder, gboolean * is_raw, gboolean * have_out, gboolean * is_dynamic) { GstIterator *pads_iter; gboolean done = FALSE; gboolean res = TRUE; *have_out = FALSE; *is_raw = FALSE; *is_dynamic = FALSE; pads_iter = gst_element_iterate_src_pads (decoder->source); while (!done) { GstPad *pad; switch (gst_iterator_next (pads_iter, (gpointer) & pad)) { case GST_ITERATOR_ERROR: res = FALSE; /* FALLTROUGH */ case GST_ITERATOR_DONE: done = TRUE; break; case GST_ITERATOR_RESYNC: /* reset results and resync */ *have_out = FALSE; *is_raw = FALSE; *is_dynamic = FALSE; gst_iterator_resync (pads_iter); break; case GST_ITERATOR_OK: /* we now officially have an ouput pad */ *have_out = TRUE; /* if FALSE, this pad has no caps and we continue with the next pad. */ if (!has_all_raw_caps (pad, is_raw)) break; /* caps on source pad are all raw, we can add the pad */ if (*is_raw) new_decoded_pad (decoder->source, pad, FALSE, decoder); break; } } gst_iterator_free (pads_iter); if (!*have_out) { GstElementClass *elemclass; GList *walk; /* element has no output pads, check for padtemplates that list SOMETIMES * pads. */ elemclass = GST_ELEMENT_GET_CLASS (decoder->source); walk = gst_element_class_get_pad_template_list (elemclass); while (walk != NULL) { GstPadTemplate *templ; templ = (GstPadTemplate *) walk->data; if (GST_PAD_TEMPLATE_DIRECTION (templ) == GST_PAD_SRC) { if (GST_PAD_TEMPLATE_PRESENCE (templ) == GST_PAD_SOMETIMES) *is_dynamic = TRUE; break; } walk = g_list_next (walk); } } return res; } static void remove_decoders (GstURIDecodeBin * bin) { GSList *walk; for (walk = bin->decoders; walk; walk = g_slist_next (walk)) { GstElement *decoder = GST_ELEMENT_CAST (walk->data); GST_DEBUG_OBJECT (bin, "removing old decoder element"); gst_element_set_state (decoder, GST_STATE_NULL); gst_bin_remove (GST_BIN_CAST (bin), decoder); } g_slist_free (bin->decoders); bin->decoders = NULL; } static void remove_pads (GstURIDecodeBin * bin) { GSList *walk; for (walk = bin->srcpads; walk; walk = g_slist_next (walk)) { GstPad *pad = GST_PAD_CAST (walk->data); GST_DEBUG_OBJECT (bin, "removing old pad"); gst_pad_set_active (pad, FALSE); gst_element_remove_pad (GST_ELEMENT_CAST (bin), pad); } g_slist_free (bin->srcpads); bin->srcpads = NULL; } static GstElement * make_decoder (GstURIDecodeBin * decoder, gboolean use_queue) { GstElement *result, *decodebin; /* now create the decoder element */ decodebin = gst_element_factory_make ("decodebin2", NULL); if (!decodebin) goto no_decodebin; if (use_queue) { GstElement *queue; GstPad *gpad, *pad; queue = gst_element_factory_make ("queue2", NULL); if (!queue) goto no_queue2; /* configure the queue as a buffering element */ g_object_set (G_OBJECT (queue), "use-buffering", TRUE, NULL); result = gst_bin_new ("source-bin"); gst_bin_add (GST_BIN_CAST (result), queue); gst_bin_add (GST_BIN_CAST (result), decodebin); gst_element_link (queue, decodebin); pad = gst_element_get_pad (queue, "sink"); gpad = gst_ghost_pad_new (GST_PAD_NAME (pad), pad); gst_object_unref (pad); gst_pad_set_active (gpad, TRUE); gst_element_add_pad (GST_ELEMENT_CAST (result), gpad); } else { result = decodebin; } /* set up callbacks to create the links between decoded data * and video/audio/subtitle rendering/output. */ g_signal_connect (G_OBJECT (decodebin), "new-decoded-pad", G_CALLBACK (new_decoded_pad), decoder); g_signal_connect (G_OBJECT (decodebin), "no-more-pads", G_CALLBACK (no_more_pads), decoder); g_signal_connect (G_OBJECT (decodebin), "unknown-type", G_CALLBACK (unknown_type), decoder); g_object_set_data (G_OBJECT (decodebin), "pending", "1"); decoder->pending++; gst_bin_add (GST_BIN_CAST (decoder), result); decoder->decoders = g_slist_prepend (decoder->decoders, result); return result; /* ERRORS */ no_decodebin: { GST_ELEMENT_ERROR (decoder, CORE, MISSING_PLUGIN, (_("Could not create \"decodebin2\" element.")), (NULL)); return NULL; } no_queue2: { GST_ELEMENT_ERROR (decoder, CORE, MISSING_PLUGIN, (_("Could not create \"queue2\" element.")), (NULL)); return NULL; } } static void remove_source (GstURIDecodeBin * bin) { GstElement *source = bin->source; if (source) { GST_DEBUG_OBJECT (bin, "removing old src element"); gst_element_set_state (source, GST_STATE_NULL); gst_bin_remove (GST_BIN_CAST (bin), source); if (bin->src_np_sig_id) { g_signal_handler_disconnect (G_OBJECT (source), bin->src_np_sig_id); bin->src_np_sig_id = 0; } if (bin->src_nmp_sig_id) { g_signal_handler_disconnect (G_OBJECT (source), bin->src_nmp_sig_id); bin->src_nmp_sig_id = 0; } bin->source = NULL; } } /* is called when a dynamic source element created a new pad. */ static void source_new_pad (GstElement * element, GstPad * pad, GstURIDecodeBin * bin) { GstElement *decoder; gboolean is_raw; GST_DEBUG_OBJECT (bin, "Found new pad %s.%s in source element %s", GST_DEBUG_PAD_NAME (pad), GST_ELEMENT_NAME (element)); /* if this is a pad with all raw caps, we can expose it */ if (has_all_raw_caps (pad, &is_raw) && is_raw) { /* it's all raw, create output pads. */ new_decoded_pad (element, pad, FALSE, bin); return; } /* not raw, create decoder */ decoder = make_decoder (bin, FALSE); if (!decoder) goto no_decodebin; /* and link to decoder */ if (!gst_element_link (bin->source, decoder)) goto could_not_link; GST_DEBUG_OBJECT (bin, "linked decoder to new pad"); gst_element_set_state (decoder, GST_STATE_PLAYING); return; /* ERRORS */ no_decodebin: { /* error was posted */ return; } could_not_link: { GST_ELEMENT_ERROR (bin, CORE, NEGOTIATION, (NULL), ("Can't link source to decoder element")); return; } } /* construct and run the source and decoder elements until we found * all the streams or until a preroll queue has been filled. */ static gboolean setup_source (GstURIDecodeBin * decoder) { gboolean is_raw, have_out, is_dynamic; GST_DEBUG_OBJECT (decoder, "setup source"); /* delete old src */ remove_source (decoder); /* create and configure an element that can handle the uri */ if (!(decoder->source = gen_source_element (decoder))) goto no_source; /* state will be merged later - if file is not found, error will be * handled by the application right after. */ gst_bin_add (GST_BIN_CAST (decoder), decoder->source); /* remove the old decoders now, if any */ remove_decoders (decoder); /* see if the source element emits raw audio/video all by itself, * if so, we can create streams for the pads and be done with it. * Also check that is has source pads, if not, we assume it will * do everything itself. */ if (!analyse_source (decoder, &is_raw, &have_out, &is_dynamic)) goto invalid_source; if (is_raw) { GST_DEBUG_OBJECT (decoder, "Source provides all raw data"); /* source provides raw data, we added the pads and we can now signal a * no_more pads because we are done. */ /* FIXME, actually do this... */ return TRUE; } if (!have_out && !is_dynamic) { GST_DEBUG_OBJECT (decoder, "Source has no output pads"); /* create a stream to indicate that this uri is handled by a self * contained element. We are now done. */ add_element_stream (decoder->source, decoder); return TRUE; } if (is_dynamic) { GST_DEBUG_OBJECT (decoder, "Source has dynamic output pads"); /* connect a handler for the new-pad signal */ decoder->src_np_sig_id = g_signal_connect (G_OBJECT (decoder->source), "pad-added", G_CALLBACK (source_new_pad), decoder); decoder->src_nmp_sig_id = g_signal_connect (G_OBJECT (decoder->source), "no-more-pads", G_CALLBACK (source_no_more_pads), decoder); g_object_set_data (G_OBJECT (decoder->source), "pending", "1"); decoder->pending++; } else { GstElement *dec_elem; GST_DEBUG_OBJECT (decoder, "Pluggin decodebin to source"); /* no dynamic source, we can link now */ dec_elem = make_decoder (decoder, decoder->is_stream); if (!dec_elem) goto no_decoder; if (!gst_element_link (decoder->source, dec_elem)) goto could_not_link; } return TRUE; /* ERRORS */ no_source: { /* error message was already posted */ return FALSE; } invalid_source: { GST_ELEMENT_ERROR (decoder, CORE, FAILED, (_("Source element is invalid.")), (NULL)); return FALSE; } no_decoder: { /* message was posted */ return FALSE; } could_not_link: { GST_ELEMENT_ERROR (decoder, CORE, NEGOTIATION, (NULL), ("Can't link source to decoder element")); return FALSE; } } /* generic struct passed to all query fold methods * FIXME, move to core. */ typedef struct { GstQuery *query; gint64 min; gint64 max; gboolean seekable; gboolean live; } QueryFold; typedef void (*QueryInitFunction) (GstURIDecodeBin * dec, QueryFold * fold); typedef void (*QueryDoneFunction) (GstURIDecodeBin * dec, QueryFold * fold); /* for duration/position we collect all durations/positions and take * the MAX of all valid results */ static void decoder_query_init (GstURIDecodeBin * dec, QueryFold * fold) { fold->min = 0; fold->max = -1; fold->seekable = TRUE; fold->live = 0; } static gboolean decoder_query_duration_fold (GstPad * item, GValue * ret, QueryFold * fold) { if (gst_pad_query (item, fold->query)) { gint64 duration; g_value_set_boolean (ret, TRUE); gst_query_parse_duration (fold->query, NULL, &duration); GST_DEBUG_OBJECT (item, "got duration %" G_GINT64_FORMAT, duration); if (duration > fold->max) fold->max = duration; } gst_object_unref (item); return TRUE; } static void decoder_query_duration_done (GstURIDecodeBin * dec, QueryFold * fold) { GstFormat format; gst_query_parse_duration (fold->query, &format, NULL); /* store max in query result */ gst_query_set_duration (fold->query, format, fold->max); GST_DEBUG ("max duration %" G_GINT64_FORMAT, fold->max); } static gboolean decoder_query_position_fold (GstPad * item, GValue * ret, QueryFold * fold) { if (gst_pad_query (item, fold->query)) { gint64 position; g_value_set_boolean (ret, TRUE); gst_query_parse_position (fold->query, NULL, &position); GST_DEBUG_OBJECT (item, "got position %" G_GINT64_FORMAT, position); if (position > fold->max) fold->max = position; } gst_object_unref (item); return TRUE; } static void decoder_query_position_done (GstURIDecodeBin * dec, QueryFold * fold) { GstFormat format; gst_query_parse_position (fold->query, &format, NULL); /* store max in query result */ gst_query_set_position (fold->query, format, fold->max); GST_DEBUG_OBJECT (dec, "max position %" G_GINT64_FORMAT, fold->max); } static gboolean decoder_query_latency_fold (GstPad * item, GValue * ret, QueryFold * fold) { if (gst_pad_query (item, fold->query)) { GstClockTime min, max; gboolean live; g_value_set_boolean (ret, TRUE); gst_query_parse_latency (fold->query, &live, &min, &max); GST_DEBUG_OBJECT (item, "got latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT ", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live); /* for the combined latency we collect the MAX of all min latencies and * the MIN of all max latencies */ if (min > fold->min) fold->min = min; if (fold->max == -1) fold->max = max; else if (max < fold->max) fold->max = max; if (fold->live == FALSE) fold->live = live; } gst_object_unref (item); return TRUE; } static void decoder_query_latency_done (GstURIDecodeBin * dec, QueryFold * fold) { /* store max in query result */ gst_query_set_latency (fold->query, fold->live, fold->min, fold->max); GST_DEBUG_OBJECT (dec, "latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT ", live %d", GST_TIME_ARGS (fold->min), GST_TIME_ARGS (fold->max), fold->live); } /* we are seekable if all srcpads are seekable */ static gboolean decoder_query_seeking_fold (GstPad * item, GValue * ret, QueryFold * fold) { if (gst_pad_query (item, fold->query)) { gboolean seekable; g_value_set_boolean (ret, TRUE); gst_query_parse_seeking (fold->query, NULL, &seekable, NULL, NULL); GST_DEBUG_OBJECT (item, "got seekable %d", seekable); if (fold->seekable == TRUE) fold->seekable = seekable; } gst_object_unref (item); return TRUE; } static void decoder_query_seeking_done (GstURIDecodeBin * dec, QueryFold * fold) { GstFormat format; gst_query_parse_seeking (fold->query, &format, NULL, NULL, NULL); gst_query_set_seeking (fold->query, format, fold->seekable, 0, -1); GST_DEBUG_OBJECT (dec, "seekable %d", fold->seekable); } /* generic fold, return first valid result */ static gboolean decoder_query_generic_fold (GstPad * item, GValue * ret, QueryFold * fold) { gboolean res; if ((res = gst_pad_query (item, fold->query))) { g_value_set_boolean (ret, TRUE); GST_DEBUG_OBJECT (item, "answered query %p", fold->query); } gst_object_unref (item); /* and stop as soon as we have a valid result */ return !res; } /* we're a bin, the default query handler iterates sink elements, which we don't * have normally. We should just query all source pads. */ static gboolean gst_uri_decode_bin_query (GstElement * element, GstQuery * query) { GstURIDecodeBin *decoder; gboolean res = FALSE; GstIterator *iter; GstIteratorFoldFunction fold_func; QueryInitFunction fold_init = NULL; QueryDoneFunction fold_done = NULL; QueryFold fold_data; GValue ret = { 0 }; decoder = GST_URI_DECODE_BIN (element); switch (GST_QUERY_TYPE (query)) { case GST_QUERY_DURATION: /* iterate and collect durations */ fold_func = (GstIteratorFoldFunction) decoder_query_duration_fold; fold_init = decoder_query_init; fold_done = decoder_query_duration_done; break; case GST_QUERY_POSITION: /* iterate and collect durations */ fold_func = (GstIteratorFoldFunction) decoder_query_position_fold; fold_init = decoder_query_init; fold_done = decoder_query_position_done; break; case GST_QUERY_LATENCY: /* iterate and collect durations */ fold_func = (GstIteratorFoldFunction) decoder_query_latency_fold; fold_init = decoder_query_init; fold_done = decoder_query_latency_done; break; case GST_QUERY_SEEKING: /* iterate and collect durations */ fold_func = (GstIteratorFoldFunction) decoder_query_seeking_fold; fold_init = decoder_query_init; fold_done = decoder_query_seeking_done; break; default: fold_func = (GstIteratorFoldFunction) decoder_query_generic_fold; break; } fold_data.query = query; g_value_init (&ret, G_TYPE_BOOLEAN); g_value_set_boolean (&ret, FALSE); iter = gst_element_iterate_src_pads (element); GST_DEBUG_OBJECT (element, "Sending query %p (type %d) to src pads", query, GST_QUERY_TYPE (query)); if (fold_init) fold_init (decoder, &fold_data); while (TRUE) { GstIteratorResult ires; ires = gst_iterator_fold (iter, fold_func, &ret, &fold_data); switch (ires) { case GST_ITERATOR_RESYNC: gst_iterator_resync (iter); if (fold_init) fold_init (decoder, &fold_data); g_value_set_boolean (&ret, FALSE); break; case GST_ITERATOR_OK: case GST_ITERATOR_DONE: res = g_value_get_boolean (&ret); if (fold_done != NULL && res) fold_done (decoder, &fold_data); goto done; default: res = FALSE; goto done; } } done: gst_iterator_free (iter); return res; } static GstStateChangeReturn gst_uri_decode_bin_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret; GstURIDecodeBin *decoder; decoder = GST_URI_DECODE_BIN (element); switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: if (!setup_source (decoder)) goto source_failed; break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: GST_DEBUG ("ready to paused"); if (ret == GST_STATE_CHANGE_FAILURE) goto setup_failed; break; case GST_STATE_CHANGE_PAUSED_TO_READY: GST_DEBUG ("paused to ready"); remove_decoders (decoder); remove_pads (decoder); remove_source (decoder); break; default: break; } return ret; /* ERRORS */ source_failed: { return GST_STATE_CHANGE_FAILURE; } setup_failed: { /* clean up leftover groups */ return GST_STATE_CHANGE_FAILURE; } } static gboolean plugin_init (GstPlugin * plugin) { #ifdef ENABLE_NLS GST_DEBUG ("binding text domain %s to locale dir %s", GETTEXT_PACKAGE, LOCALEDIR); bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR); #endif /* ENABLE_NLS */ return gst_element_register (plugin, "uridecodebin", GST_RANK_NONE, GST_TYPE_URI_DECODE_BIN); } GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, GST_VERSION_MINOR, "uridecodebin", "URI Decoder bin", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)