diff -r 000000000000 -r 0e761a78d257 gst_plugins_base/gst/playback/gsturidecodebin.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gst_plugins_base/gst/playback/gsturidecodebin.c Thu Dec 17 08:53:32 2009 +0200 @@ -0,0 +1,1633 @@ +/* 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 + +#include "gstplay-marshal.h" +#include "gstplay-enum.h" + +#ifdef __SYMBIAN32__ +#include +#endif +#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; + guint connection_speed; + GstCaps *caps; + gchar *encoding; + + 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; + + /* signal fired when we found a pad that we cannot decode */ + void (*unknown_type) (GstElement * element, GstPad * pad, GstCaps * caps); + + /* signal fired to know if we continue trying to decode the given caps */ + gboolean (*autoplug_continue) (GstElement * element, GstPad * pad, + GstCaps * caps); + /* signal fired to get a list of factories to try to autoplug */ + GValueArray *(*autoplug_factories) (GstElement * element, GstPad * pad, + GstCaps * caps); + /* signal fired to select from the proposed list of factories */ + GstAutoplugSelectResult (*autoplug_select) (GstElement * element, + GstPad * pad, GstCaps * caps, GValueArray * factories); + + /* emited when all data is decoded */ + void (*drained) (GstElement * element); +}; + +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 "); + +/* signals */ +enum +{ + SIGNAL_UNKNOWN_TYPE, + SIGNAL_AUTOPLUG_CONTINUE, + SIGNAL_AUTOPLUG_FACTORIES, + SIGNAL_AUTOPLUG_SELECT, + SIGNAL_DRAINED, + LAST_SIGNAL +}; + +/* properties */ +#define DEFAULT_PROP_URI NULL +#define DEFAULT_CONNECTION_SPEED 0 +#define DEFAULT_CAPS NULL +#define DEFAULT_SUBTITLE_ENCODING NULL + +enum +{ + PROP_0, + PROP_URI, + PROP_CONNECTION_SPEED, + PROP_CAPS, + PROP_SUBTITLE_ENCODING, + PROP_LAST +}; + +static guint gst_uri_decode_bin_signals[LAST_SIGNAL] = { 0 }; + +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 void handle_message (GstBin * bin, GstMessage * msg); + +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 gboolean +_gst_boolean_accumulator (GSignalInvocationHint * ihint, + GValue * return_accu, const GValue * handler_return, gpointer dummy) +{ + gboolean myboolean; + + myboolean = g_value_get_boolean (handler_return); + if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP)) + g_value_set_boolean (return_accu, myboolean); + + /* stop emission if FALSE */ + return myboolean; +} + +static gboolean +_gst_array_accumulator (GSignalInvocationHint * ihint, + GValue * return_accu, const GValue * handler_return, gpointer dummy) +{ + gpointer array; + + array = g_value_get_boxed (handler_return); + if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP)) + g_value_set_boxed (return_accu, array); + + return FALSE; +} + +static gboolean +_gst_select_accumulator (GSignalInvocationHint * ihint, + GValue * return_accu, const GValue * handler_return, gpointer dummy) +{ + GstAutoplugSelectResult res; + + res = g_value_get_enum (handler_return); + if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP)) + g_value_set_enum (return_accu, res); + + return FALSE; +} + +static gboolean +gst_uri_decode_bin_autoplug_continue (GstElement * element, GstPad * pad, + GstCaps * caps) +{ + /* by default we always continue */ + return TRUE; +} + +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)); + + g_object_class_install_property (gobject_class, PROP_CONNECTION_SPEED, + g_param_spec_uint ("connection-speed", "Connection Speed", + "Network connection speed in kbps (0 = unknown)", + 0, G_MAXUINT, DEFAULT_CONNECTION_SPEED, G_PARAM_READWRITE)); + + g_object_class_install_property (gobject_class, PROP_CAPS, + g_param_spec_boxed ("caps", "Caps", + "The caps on which to stop decoding. (NULL = default)", + GST_TYPE_CAPS, G_PARAM_READWRITE)); + + g_object_class_install_property (gobject_class, PROP_SUBTITLE_ENCODING, + g_param_spec_string ("subtitle-encoding", "subtitle encoding", + "Encoding to assume if input subtitles are not in UTF-8 encoding. " + "If not set, the GST_SUBTITLE_ENCODING environment variable will " + "be checked for an encoding to use. If that is not set either, " + "ISO-8859-15 will be assumed.", NULL, G_PARAM_READWRITE)); + + /** + * GstURIDecodeBin::unknown-type: + * @pad: the new pad containing caps that cannot be resolved to a 'final' stream type. + * @caps: the #GstCaps of the pad that cannot be resolved. + * + * This signal is emitted when a pad for which there is no further possible + * decoding is added to the uridecodebin. + */ + gst_uri_decode_bin_signals[SIGNAL_UNKNOWN_TYPE] = + g_signal_new ("unknown-type", G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURIDecodeBinClass, unknown_type), + NULL, NULL, gst_marshal_VOID__OBJECT_OBJECT, G_TYPE_NONE, 2, + GST_TYPE_PAD, GST_TYPE_CAPS); + + /** + * GstURIDecodeBin::autoplug-continue: + * @pad: The #GstPad. + * @caps: The #GstCaps found. + * + * This signal is emitted whenever uridecodebin finds a new stream. It is + * emitted before looking for any elements that can handle that stream. + * + * Returns: #TRUE if you wish uridecodebin to look for elements that can + * handle the given @caps. If #FALSE, those caps will be considered as + * final and the pad will be exposed as such (see 'new-decoded-pad' + * signal). + */ + gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE] = + g_signal_new ("autoplug-continue", G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURIDecodeBinClass, + autoplug_continue), _gst_boolean_accumulator, NULL, + gst_play_marshal_BOOLEAN__OBJECT_OBJECT, G_TYPE_BOOLEAN, 2, GST_TYPE_PAD, + GST_TYPE_CAPS); + + /** + * GstURIDecodeBin::autoplug-factories: + * @pad: The #GstPad. + * @caps: The #GstCaps found. + * + * This function is emited when an array of possible factories for @caps on + * @pad is needed. Decodebin2 will by default return + * + * Returns: a #GValueArray* with a list of factories to try. The factories are + * by default tried in the returned order or based on the index returned by + * "autoplug-select". + */ + gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES] = + g_signal_new ("autoplug-factories", G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURIDecodeBinClass, + autoplug_factories), _gst_array_accumulator, NULL, + gst_play_marshal_BOXED__OBJECT_OBJECT, G_TYPE_VALUE_ARRAY, 2, + GST_TYPE_PAD, GST_TYPE_CAPS); + + /** + * GstURIDecodeBin::autoplug-select: + * @pad: The #GstPad. + * @caps: The #GstCaps. + * @factories: A #GValueArray of possible #GstElementFactory to use, sorted by + * rank (higher ranks come first). + * + * This signal is emitted once uridecodebin has found all the possible + * #GstElementFactory that can be used to handle the given @caps. + * + * Returns: A #gint indicating what factory index from the @factories array + * that you wish uridecodebin to use for trying to decode the given @caps. + * -1 to stop selection of a factory. The default handler always + * returns the first possible factory. + */ + gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_SELECT] = + g_signal_new ("autoplug-select", G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURIDecodeBinClass, + autoplug_select), _gst_select_accumulator, NULL, + gst_play_marshal_ENUM__OBJECT_OBJECT_OBJECT, + GST_TYPE_AUTOPLUG_SELECT_RESULT, 3, GST_TYPE_PAD, GST_TYPE_CAPS, + GST_TYPE_ELEMENT_FACTORY); + + /** + * GstURIDecodeBin::drained: + * + * This signal is emitted when the data for the current uri is played. + */ + gst_uri_decode_bin_signals[SIGNAL_DRAINED] = + g_signal_new ("drained", G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_LAST, + G_STRUCT_OFFSET (GstURIDecodeBinClass, drained), NULL, NULL, + gst_marshal_VOID__VOID, G_TYPE_NONE, 0, G_TYPE_NONE); + + gstelement_class->query = GST_DEBUG_FUNCPTR (gst_uri_decode_bin_query); + gstelement_class->change_state = + GST_DEBUG_FUNCPTR (gst_uri_decode_bin_change_state); + + gstbin_class->handle_message = GST_DEBUG_FUNCPTR (handle_message); + + klass->autoplug_continue = + GST_DEBUG_FUNCPTR (gst_uri_decode_bin_autoplug_continue); +} + +static void +gst_uri_decode_bin_init (GstURIDecodeBin * dec, GstURIDecodeBinClass * klass) +{ + dec->uri = g_strdup (DEFAULT_PROP_URI); + dec->connection_speed = DEFAULT_CONNECTION_SPEED; + dec->caps = DEFAULT_CAPS; + dec->encoding = g_strdup (DEFAULT_SUBTITLE_ENCODING); +} + +static void +gst_uri_decode_bin_finalize (GObject * obj) +{ + GstURIDecodeBin *dec = GST_URI_DECODE_BIN (obj); + + g_free (dec->uri); + g_free (dec->encoding); + + 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: + GST_OBJECT_LOCK (dec); + g_free (dec->uri); + dec->uri = g_value_dup_string (value); + GST_OBJECT_UNLOCK (dec); + break; + case PROP_CONNECTION_SPEED: + GST_OBJECT_LOCK (dec); + dec->connection_speed = g_value_get_uint (value) * 1000; + GST_OBJECT_UNLOCK (dec); + break; + case PROP_CAPS: + GST_OBJECT_LOCK (dec); + if (dec->caps) + gst_caps_unref (dec->caps); + dec->caps = g_value_dup_boxed (value); + GST_OBJECT_UNLOCK (dec); + break; + case PROP_SUBTITLE_ENCODING: + GST_OBJECT_LOCK (dec); + g_free (dec->encoding); + dec->encoding = g_value_dup_string (value); + GST_OBJECT_UNLOCK (dec); + 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: + GST_OBJECT_LOCK (dec); + g_value_set_string (value, dec->uri); + GST_OBJECT_UNLOCK (dec); + break; + case PROP_CONNECTION_SPEED: + GST_OBJECT_LOCK (dec); + g_value_set_uint (value, dec->connection_speed / 1000); + GST_OBJECT_UNLOCK (dec); + break; + case PROP_CAPS: + GST_OBJECT_LOCK (dec); + g_value_set_boxed (value, dec->caps); + GST_OBJECT_UNLOCK (dec); + break; + case PROP_SUBTITLE_ENCODING: + GST_OBJECT_LOCK (dec); + g_value_set_string (value, dec->encoding); + GST_OBJECT_UNLOCK (dec); + 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_cb (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--; + final = (decoder->pending == 0); + +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_cb (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); + + /* store ref to the ghostpad so we can remove it */ + g_object_set_data (G_OBJECT (pad), "uridecodebin.ghostpad", newpad); + + gst_pad_set_active (newpad, TRUE); + gst_element_add_pad (GST_ELEMENT_CAST (decoder), newpad); +} + +static void +pad_removed_cb (GstElement * element, GstPad * pad, GstURIDecodeBin * decoder) +{ + GstPad *ghost; + + GST_DEBUG_OBJECT (element, "pad removed name: <%s:%s>", + GST_DEBUG_PAD_NAME (pad)); + + if (!(ghost = g_object_get_data (G_OBJECT (pad), "uridecodebin.ghostpad"))) + goto no_ghost; + + /* unghost the pad */ + gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (ghost), NULL); + + /* deactivate and remove */ + gst_pad_set_active (pad, FALSE); + gst_element_remove_pad (GST_ELEMENT_CAST (decoder), ghost); + + return; + + /* ERRORS */ +no_ghost: + { + GST_WARNING_OBJECT (element, "no ghost pad found"); + return; + } +} + +/* 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); + } + + if (g_object_class_find_property (G_OBJECT_GET_CLASS (source), + "connection-speed")) { + GST_DEBUG_OBJECT (decoder, + "setting connection-speed=%d to source element", + decoder->connection_speed / 1000); + g_object_set (source, "connection-speed", + decoder->connection_speed / 1000, 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_cb (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 void +proxy_unknown_type_signal (GstElement * element, GstPad * pad, GstCaps * caps, + GstURIDecodeBin * dec) +{ + GST_DEBUG_OBJECT (dec, "unknown-type signaled"); + + g_signal_emit (G_OBJECT (dec), + gst_uri_decode_bin_signals[SIGNAL_UNKNOWN_TYPE], 0, pad, caps); +} + +static gboolean +proxy_autoplug_continue_signal (GstElement * element, GstPad * pad, + GstCaps * caps, GstURIDecodeBin * dec) +{ + gboolean result; + + g_signal_emit (G_OBJECT (dec), + gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_CONTINUE], 0, pad, caps, + &result); + + GST_DEBUG_OBJECT (dec, "autoplug-continue returned %d", result); + + return result; +} + +static GValueArray * +proxy_autoplug_factories_signal (GstElement * element, GstPad * pad, + GstCaps * caps, GstURIDecodeBin * dec) +{ + GValueArray *result = NULL; + + g_signal_emit (G_OBJECT (dec), + gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_FACTORIES], 0, pad, caps, + &result); + + GST_DEBUG_OBJECT (dec, "autoplug-factories returned %p", result); + + return result; +} + +static GstAutoplugSelectResult +proxy_autoplug_select_signal (GstElement * element, GstPad * pad, + GstCaps * caps, GstElementFactory * factory, GstURIDecodeBin * dec) +{ + GstAutoplugSelectResult result; + + g_signal_emit (G_OBJECT (dec), + gst_uri_decode_bin_signals[SIGNAL_AUTOPLUG_SELECT], 0, pad, caps, factory, + &result); + + GST_DEBUG_OBJECT (dec, "autoplug-select returned %d", result); + + return result; +} + +static void +proxy_drained_signal (GstElement * element, GstURIDecodeBin * dec) +{ + GST_DEBUG_OBJECT (dec, "drained signaled"); + + g_signal_emit (G_OBJECT (dec), + gst_uri_decode_bin_signals[SIGNAL_DRAINED], 0, 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; + + /* connect signals to proxy */ + g_signal_connect (G_OBJECT (decodebin), "unknown-type", + G_CALLBACK (proxy_unknown_type_signal), decoder); + g_signal_connect (G_OBJECT (decodebin), "autoplug-continue", + G_CALLBACK (proxy_autoplug_continue_signal), decoder); + g_signal_connect (G_OBJECT (decodebin), "autoplug-factories", + G_CALLBACK (proxy_autoplug_factories_signal), decoder); + g_signal_connect (G_OBJECT (decodebin), "autoplug-select", + G_CALLBACK (proxy_autoplug_select_signal), decoder); + g_signal_connect (G_OBJECT (decodebin), "drained", + G_CALLBACK (proxy_drained_signal), decoder); + + 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_cb), decoder); + g_signal_connect (G_OBJECT (decodebin), + "pad-removed", G_CALLBACK (pad_removed_cb), 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_cb), 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_cb (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; + } +} + +static void +value_list_append_structure_list (GValue * list_val, GstStructure ** first, + GList * structure_list) +{ + GList *l; + + for (l = structure_list; l != NULL; l = l->next) { + GValue val = { 0, }; + + if (*first == NULL) + *first = gst_structure_copy ((GstStructure *) l->data); + + g_value_init (&val, GST_TYPE_STRUCTURE); + g_value_take_boxed (&val, gst_structure_copy ((GstStructure *) l->data)); + gst_value_list_append_value (list_val, &val); + g_value_unset (&val); + } +} + +/* if it's a redirect message with multiple redirect locations we might + * want to pick a different 'best' location depending on the required + * bitrates and the connection speed */ +static GstMessage * +handle_redirect_message (GstURIDecodeBin * dec, GstMessage * msg) +{ + const GValue *locations_list, *location_val; + GstMessage *new_msg; + GstStructure *new_structure = NULL; + GList *l_good = NULL, *l_neutral = NULL, *l_bad = NULL; + GValue new_list = { 0, }; + guint size, i; + + GST_DEBUG_OBJECT (dec, "redirect message: %" GST_PTR_FORMAT, msg); + GST_DEBUG_OBJECT (dec, "connection speed: %u", dec->connection_speed); + + if (dec->connection_speed == 0 || msg->structure == NULL) + return msg; + + locations_list = gst_structure_get_value (msg->structure, "locations"); + if (locations_list == NULL) + return msg; + + size = gst_value_list_get_size (locations_list); + if (size < 2) + return msg; + + /* maintain existing order as much as possible, just sort references + * with too high a bitrate to the end (the assumption being that if + * bitrates are given they are given for all interesting streams and + * that the you-need-at-least-version-xyz redirect has the same bitrate + * as the lowest referenced redirect alternative) */ + for (i = 0; i < size; ++i) { + const GstStructure *s; + gint bitrate = 0; + + location_val = gst_value_list_get_value (locations_list, i); + s = (const GstStructure *) g_value_get_boxed (location_val); + if (!gst_structure_get_int (s, "minimum-bitrate", &bitrate) || bitrate <= 0) { + GST_DEBUG_OBJECT (dec, "no bitrate: %" GST_PTR_FORMAT, s); + l_neutral = g_list_append (l_neutral, (gpointer) s); + } else if (bitrate > dec->connection_speed) { + GST_DEBUG_OBJECT (dec, "bitrate too high: %" GST_PTR_FORMAT, s); + l_bad = g_list_append (l_bad, (gpointer) s); + } else if (bitrate <= dec->connection_speed) { + GST_DEBUG_OBJECT (dec, "bitrate OK: %" GST_PTR_FORMAT, s); + l_good = g_list_append (l_good, (gpointer) s); + } + } + + g_value_init (&new_list, GST_TYPE_LIST); + value_list_append_structure_list (&new_list, &new_structure, l_good); + value_list_append_structure_list (&new_list, &new_structure, l_neutral); + value_list_append_structure_list (&new_list, &new_structure, l_bad); + gst_structure_set_value (new_structure, "locations", &new_list); + g_value_unset (&new_list); + + g_list_free (l_good); + g_list_free (l_neutral); + g_list_free (l_bad); + + new_msg = gst_message_new_element (msg->src, new_structure); + gst_message_unref (msg); + + GST_DEBUG_OBJECT (dec, "new redirect message: %" GST_PTR_FORMAT, new_msg); + return new_msg; +} + +static void +handle_message (GstBin * bin, GstMessage * msg) +{ + if (GST_MESSAGE_TYPE (msg) == GST_MESSAGE_ELEMENT && msg->structure != NULL + && gst_structure_has_name (msg->structure, "redirect")) { + /* sort redirect messages based on the connection speed. This simplifies + * the user of this element as it can in most cases just pick the first item + * of the sorted list as a good redirection candidate. It can of course + * choose something else from the list if it has a better way. */ + msg = handle_redirect_message (GST_URI_DECODE_BIN (bin), msg); + } + GST_BIN_CLASS (parent_class)->handle_message (bin, msg); +} + +/* 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; + } +} + +gboolean gst_decode_bin_plugin_init (GstPlugin * plugin); + +static gboolean +gst_uri_decode_bin_plugin_init (GstPlugin * plugin) +{ + GST_DEBUG_CATEGORY_INIT (gst_uri_decode_bin_debug, "uridecodebin", 0, + "URI decoder element"); + +#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); +} + +static gboolean +plugin_init (GstPlugin * plugin) +{ + if (!gst_decode_bin_plugin_init (plugin)) + return FALSE; + if (!gst_uri_decode_bin_plugin_init (plugin)) + return FALSE; + + return TRUE; +} + +GST_PLUGIN_DEFINE (GST_VERSION_MAJOR, + GST_VERSION_MINOR, + "uridecodebin", + "URI Decoder bin", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, + GST_PACKAGE_ORIGIN); + +#ifdef __SYMBIAN32__ +EXPORT_C +#endif +GstPluginDesc* _GST_PLUGIN_DESC() +{ + return &gst_plugin_desc; +}