--- /dev/null
+/* GStreamer
+ * Copyright (C) <2007> Wim Taymans <wim@fluendo.com>
+ *
+ * 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 <string.h>
+
+#include <gst/gst.h>
+#include <gst/gst-i18n-plugin.h>
+
+#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;
+
+ /* 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",
+ 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 <wim@fluendo.com>");
+
+#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)
+{
+ /* setup phase */
+ GST_DEBUG_OBJECT (element, "no more pads, %d pending", decoder->pending);
+
+ gst_element_no_more_pads (GST_ELEMENT_CAST (decoder));
+
+ /* nothing pending, we can exit */
+ if (decoder->pending == 0)
+ return;
+
+ /* the object has no pending no_more_pads */
+ if (!g_object_get_data (G_OBJECT (element), "pending"))
+ return;
+
+ g_object_set_data (G_OBJECT (element), "pending", NULL);
+
+ decoder->pending--;
+ if (decoder->pending == 0) {
+ }
+}
+
+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;
+
+ GST_DEBUG_OBJECT (element, "new decoded pad, name: <%s>. Last: %d",
+ GST_PAD_NAME (pad), last);
+
+ newpad = gst_ghost_pad_new (GST_PAD_NAME (pad), pad);
+ 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 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");
+
+ 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;
+
+ 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");
+ } 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_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)
projects / platform / upstream / gst-plugins-base.git / commitdiff