/* GStreamer * Copyright (C) <2015> Jan Schmidt * 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., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /** * SECTION:element-urisourcebin * @title: urisourcebin * * urisourcebin is an element for accessing URIs in a uniform manner. * * It handles selecting a URI source element and potentially download * buffering for network sources. It produces one or more source pads, * depending on the input source, for feeding to decoding chains or decodebin. * * The main configuration is via the #GstURISourceBin:uri property. * */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include "gstplay-enum.h" #include "gstrawcaps.h" #include "gstplaybackelements.h" #include "gstplaybackutils.h" #define GST_TYPE_URI_SOURCE_BIN \ (gst_uri_source_bin_get_type()) #define GST_URI_SOURCE_BIN(obj) \ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_URI_SOURCE_BIN,GstURISourceBin)) #define GST_URI_SOURCE_BIN_CLASS(klass) \ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_URI_SOURCE_BIN,GstURISourceBinClass)) #define GST_IS_URI_SOURCE_BIN(obj) \ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_URI_SOURCE_BIN)) #define GST_IS_URI_SOURCE_BIN_CLASS(klass) \ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_URI_SOURCE_BIN)) #define GST_URI_SOURCE_BIN_CAST(obj) ((GstURISourceBin *) (obj)) typedef struct _GstURISourceBin GstURISourceBin; typedef struct _GstURISourceBinClass GstURISourceBinClass; typedef struct _ChildSrcPadInfo ChildSrcPadInfo; typedef struct _OutputSlotInfo OutputSlotInfo; #define GST_URI_SOURCE_BIN_LOCK(urisrc) (g_mutex_lock(&((GstURISourceBin*)(urisrc))->lock)) #define GST_URI_SOURCE_BIN_UNLOCK(urisrc) (g_mutex_unlock(&((GstURISourceBin*)(urisrc))->lock)) #define BUFFERING_LOCK(ubin) G_STMT_START { \ GST_LOG_OBJECT (ubin, \ "buffering locking from thread %p", \ g_thread_self ()); \ g_mutex_lock (&GST_URI_SOURCE_BIN_CAST(ubin)->buffering_lock); \ GST_LOG_OBJECT (ubin, \ "buffering lock from thread %p", \ g_thread_self ()); \ } G_STMT_END #define BUFFERING_UNLOCK(ubin) G_STMT_START { \ GST_LOG_OBJECT (ubin, \ "buffering unlocking from thread %p", \ g_thread_self ()); \ g_mutex_unlock (&GST_URI_SOURCE_BIN_CAST(ubin)->buffering_lock); \ } G_STMT_END /* Track a source pad from the source element and the chain of (optional) * elements that are linked to it up to the output slots */ struct _ChildSrcPadInfo { GstURISourceBin *urisrc; /* Source pad this info is attached to (reffed) */ GstPad *src_pad; /* An optional typefind */ GstElement *typefind; /* Pre-parsebin buffering elements. Only present is parse-streams and * downloading *or* ring-buffer-max-size */ GstElement *pre_parse_queue; /* Post-parsebin multiqueue. Only present if parse-streams and buffering is * required */ GstElement *multiqueue; /* An optional demuxer or parsebin */ GstElement *demuxer; gboolean demuxer_handles_buffering; gboolean demuxer_streams_aware; gboolean demuxer_is_parsebin; /* list of output slots */ GList *outputs; /* The following fields specify how this output should be handled */ /* use_downloadbuffer : TRUE if the content from the source should be * downloaded with a downloadbuffer element */ gboolean use_downloadbuffer; /* use_queue2: TRUE if the contents should be buffered through a queue2 * element */ gboolean use_queue2; }; /* Output Slot: * * Handles everything related to outputing, including optional buffering. */ struct _OutputSlotInfo { ChildSrcPadInfo *linked_info; /* source pad info feeding this slot */ GstPad *originating_pad; /* Pad that created this OutputSlotInfo (ref held) */ GstPad *output_pad; /* Output ghost pad */ gboolean is_eos; /* Did EOS get fed into the buffering element */ GstElement *queue; /* queue2 or downloadbuffer */ GstPad *queue_sinkpad; /* Sink pad of the queue eleemnt */ gulong bitrate_changed_id; /* queue bitrate changed notification */ guint demuxer_event_probe_id; }; /** * GstURISourceBin * * urisourcebin element struct */ struct _GstURISourceBin { GstBin parent_instance; GMutex lock; /* lock for constructing */ gchar *uri; guint64 connection_speed; gboolean activated; /* TRUE if the switch to PAUSED has been completed */ gboolean flushing; /* TRUE if switching from PAUSED to READY */ GCond activation_cond; /* Uses the urisourcebin lock */ gboolean is_stream; gboolean is_adaptive; guint64 buffer_duration; /* When buffering, buffer duration (ns) */ guint buffer_size; /* When buffering, buffer size (bytes) */ gboolean download; gboolean use_buffering; gdouble low_watermark; gdouble high_watermark; gboolean parse_streams; GstElement *source; GList *src_infos; /* List of ChildSrcPadInfo for the source */ guint numpads; /* for dynamic sources */ guint src_np_sig_id; /* new-pad signal id */ guint64 ring_buffer_max_size; /* 0 means disabled */ GList *buffering_status; /* element currently buffering messages */ gint last_buffering_pct; /* Avoid sending buffering over and over */ GMutex buffering_lock; GMutex buffering_post_lock; }; struct _GstURISourceBinClass { GstBinClass parent_class; /* emitted when all data has been drained out * FIXME : What do we need this for ?? */ void (*drained) (GstElement * element); /* emitted when all data has been fed into buffering slots (i.e the * actual sources are done) */ void (*about_to_finish) (GstElement * element); }; static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src_%u", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS_ANY); static GstStaticCaps default_raw_caps = GST_STATIC_CAPS (DEFAULT_RAW_CAPS); GST_DEBUG_CATEGORY_STATIC (gst_uri_source_bin_debug); #define GST_CAT_DEFAULT gst_uri_source_bin_debug /* signals */ enum { SIGNAL_DRAINED, SIGNAL_ABOUT_TO_FINISH, SIGNAL_SOURCE_SETUP, LAST_SIGNAL }; /* properties */ #define DEFAULT_PROP_URI NULL #define DEFAULT_PROP_SOURCE NULL #define DEFAULT_CONNECTION_SPEED 0 #define DEFAULT_BUFFER_DURATION -1 #define DEFAULT_BUFFER_SIZE -1 #define DEFAULT_DOWNLOAD FALSE #define DEFAULT_USE_BUFFERING TRUE #define DEFAULT_RING_BUFFER_MAX_SIZE 0 #define DEFAULT_LOW_WATERMARK 0.01 #define DEFAULT_HIGH_WATERMARK 0.60 #define DEFAULT_PARSE_STREAMS FALSE #define ACTUAL_DEFAULT_BUFFER_SIZE 10 * 1024 * 1024 /* The value used for byte limits when buffer-size == -1 */ #define ACTUAL_DEFAULT_BUFFER_DURATION 5 * GST_SECOND /* The value used for time limits when buffer-duration == -1 */ #define GET_BUFFER_SIZE(u) ((u)->buffer_size == -1 ? ACTUAL_DEFAULT_BUFFER_SIZE : (u)->buffer_size) #define GET_BUFFER_DURATION(u) ((u)->buffer_duration == -1 ? ACTUAL_DEFAULT_BUFFER_DURATION : (u)->buffer_duration) #define DEFAULT_CAPS (gst_static_caps_get (&default_raw_caps)) enum { PROP_0, PROP_URI, PROP_SOURCE, PROP_CONNECTION_SPEED, PROP_BUFFER_SIZE, PROP_BUFFER_DURATION, PROP_DOWNLOAD, PROP_USE_BUFFERING, PROP_RING_BUFFER_MAX_SIZE, PROP_LOW_WATERMARK, PROP_HIGH_WATERMARK, PROP_STATISTICS, PROP_PARSE_STREAMS, }; #define CUSTOM_EOS_QUARK _custom_eos_quark_get () #define CUSTOM_EOS_QUARK_DATA "custom-eos" static GQuark _custom_eos_quark_get (void) { static gsize g_quark; if (g_once_init_enter (&g_quark)) { gsize quark = (gsize) g_quark_from_static_string ("urisourcebin-custom-eos"); g_once_init_leave (&g_quark, quark); } return g_quark; } static void post_missing_plugin_error (GstElement * urisrc, const gchar * element_name); static guint gst_uri_source_bin_signals[LAST_SIGNAL] = { 0 }; GType gst_uri_source_bin_get_type (void); #define gst_uri_source_bin_parent_class parent_class G_DEFINE_TYPE (GstURISourceBin, gst_uri_source_bin, GST_TYPE_BIN); #define _do_init \ GST_DEBUG_CATEGORY_INIT (gst_uri_source_bin_debug, "urisourcebin", 0, "URI source element"); \ playback_element_init (plugin); GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (urisourcebin, "urisourcebin", GST_RANK_NONE, GST_TYPE_URI_SOURCE_BIN, _do_init); static void gst_uri_source_bin_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_uri_source_bin_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_uri_source_bin_finalize (GObject * obj); static void handle_message (GstBin * bin, GstMessage * msg); static gboolean gst_uri_source_bin_query (GstElement * element, GstQuery * query); static GstStateChangeReturn gst_uri_source_bin_change_state (GstElement * element, GstStateChange transition); static void handle_new_pad (ChildSrcPadInfo * info, GstPad * srcpad, GstCaps * caps); static gboolean setup_typefind (ChildSrcPadInfo * info); static void expose_output_pad (GstURISourceBin * urisrc, GstPad * pad); static OutputSlotInfo *new_output_slot (ChildSrcPadInfo * info, GstPad * originating_pad); static void free_output_slot (OutputSlotInfo * slot, GstURISourceBin * urisrc); static void free_output_slot_async (GstURISourceBin * urisrc, OutputSlotInfo * slot); static GstPad *create_output_pad (OutputSlotInfo * slot, GstPad * pad); static void remove_buffering_msgs (GstURISourceBin * bin, GstObject * src); static void update_queue_values (GstURISourceBin * urisrc); static GstStructure *get_queue_statistics (GstURISourceBin * urisrc); static void gst_uri_source_bin_class_init (GstURISourceBinClass * 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_source_bin_set_property; gobject_class->get_property = gst_uri_source_bin_get_property; gobject_class->finalize = gst_uri_source_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_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_SOURCE, g_param_spec_object ("source", "Source", "Source object used", GST_TYPE_ELEMENT, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_CONNECTION_SPEED, g_param_spec_uint64 ("connection-speed", "Connection Speed", "Network connection speed in kbps (0 = unknown)", 0, G_MAXUINT64 / 1000, DEFAULT_CONNECTION_SPEED, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_BUFFER_SIZE, g_param_spec_int ("buffer-size", "Buffer size (bytes)", "Buffer size when buffering streams (-1 default value)", -1, G_MAXINT, DEFAULT_BUFFER_SIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_BUFFER_DURATION, g_param_spec_int64 ("buffer-duration", "Buffer duration (ns)", "Buffer duration when buffering streams (-1 default value)", -1, G_MAXINT64, DEFAULT_BUFFER_DURATION, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstURISourceBin::download: * * For certain media type, enable download buffering. */ g_object_class_install_property (gobject_class, PROP_DOWNLOAD, g_param_spec_boolean ("download", "Download", "Attempt download buffering when buffering network streams", DEFAULT_DOWNLOAD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstURISourceBin::use-buffering: * * Perform buffering using a queue2 element, and emit BUFFERING * messages based on low-/high-percent thresholds of streaming data, * such as adaptive-demuxer streams. * * When download buffering is activated and used for the current media * type, this property does nothing. * */ g_object_class_install_property (gobject_class, PROP_USE_BUFFERING, g_param_spec_boolean ("use-buffering", "Use Buffering", "Perform buffering on demuxed/parsed media", DEFAULT_USE_BUFFERING, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstURISourceBin::ring-buffer-max-size * * The maximum size of the ring buffer in kilobytes. If set to 0, the ring * buffer is disabled. Default is 0. * */ g_object_class_install_property (gobject_class, PROP_RING_BUFFER_MAX_SIZE, g_param_spec_uint64 ("ring-buffer-max-size", "Max. ring buffer size (bytes)", "Max. amount of data in the ring buffer (bytes, 0 = ring buffer disabled)", 0, G_MAXUINT, DEFAULT_RING_BUFFER_MAX_SIZE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstURISourceBin::low-watermark * * Proportion of the queue size (either in bytes or time) for buffering * to restart when crossed from above. Only used if use-buffering is TRUE. */ g_object_class_install_property (gobject_class, PROP_LOW_WATERMARK, g_param_spec_double ("low-watermark", "Low watermark", "Low threshold for buffering to start. Only used if use-buffering is True", 0.0, 1.0, DEFAULT_LOW_WATERMARK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstURISourceBin::high-watermark * * Proportion of the queue size (either in bytes or time) to complete * buffering. Only used if use-buffering is TRUE. */ g_object_class_install_property (gobject_class, PROP_HIGH_WATERMARK, g_param_spec_double ("high-watermark", "High watermark", "High threshold for buffering to finish. Only used if use-buffering is True", 0.0, 1.0, DEFAULT_HIGH_WATERMARK, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstURISourceBin::statistics * * A GStructure containing the following values based on the values from * all the queue's contained in this urisourcebin. * * "minimum-byte-level" G_TYPE_UINT Minimum of the current byte levels * "maximum-byte-level" G_TYPE_UINT Maximum of the current byte levels * "average-byte-level" G_TYPE_UINT Average of the current byte levels * "minimum-time-level" G_TYPE_UINT64 Minimum of the current time levels * "maximum-time-level" G_TYPE_UINT64 Maximum of the current time levels * "average-time-level" G_TYPE_UINT64 Average of the current time levels */ g_object_class_install_property (gobject_class, PROP_STATISTICS, g_param_spec_boxed ("statistics", "Queue Statistics", "A set of statistics over all the queue-like elements contained in " "this element", GST_TYPE_STRUCTURE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); /** * GstURISourceBin:parse-streams: * * A `parsebin` element will be used on all non-raw streams, and urisourcebin * will output the elementary streams. Recommended when buffering is used * since it will provide accurate buffering levels. * * Since: 1.22 */ g_object_class_install_property (gobject_class, PROP_PARSE_STREAMS, g_param_spec_boolean ("parse-streams", "Parse Streams", "Extract the elementary streams of non-raw sources", DEFAULT_PARSE_STREAMS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstURISourceBin::drained: * * This signal is emitted when the data for the current uri is played. */ gst_uri_source_bin_signals[SIGNAL_DRAINED] = g_signal_new ("drained", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURISourceBinClass, drained), NULL, NULL, NULL, G_TYPE_NONE, 0, G_TYPE_NONE); /** * GstURISourceBin::about-to-finish: * * This signal is emitted when the data for the current uri is played. */ gst_uri_source_bin_signals[SIGNAL_ABOUT_TO_FINISH] = g_signal_new ("about-to-finish", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURISourceBinClass, about_to_finish), NULL, NULL, NULL, G_TYPE_NONE, 0, G_TYPE_NONE); /** * GstURISourceBin::source-setup: * @bin: the urisourcebin. * @source: source element * * This signal is emitted after the source element has been created, so * it can be configured by setting additional properties (e.g. set a * proxy server for an http source, or set the device and read speed for * an audio cd source). This is functionally equivalent to connecting to * the notify::source signal, but more convenient. * * Since: 1.6.1 */ gst_uri_source_bin_signals[SIGNAL_SOURCE_SETUP] = g_signal_new ("source-setup", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 1, GST_TYPE_ELEMENT); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&srctemplate)); gst_element_class_set_static_metadata (gstelement_class, "URI reader", "Generic/Bin/Source", "Download and buffer a URI as needed", "Jan Schmidt "); gstelement_class->query = GST_DEBUG_FUNCPTR (gst_uri_source_bin_query); gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_uri_source_bin_change_state); gstbin_class->handle_message = GST_DEBUG_FUNCPTR (handle_message); } static void gst_uri_source_bin_init (GstURISourceBin * urisrc) { g_mutex_init (&urisrc->lock); g_mutex_init (&urisrc->buffering_lock); g_mutex_init (&urisrc->buffering_post_lock); g_cond_init (&urisrc->activation_cond); urisrc->uri = g_strdup (DEFAULT_PROP_URI); urisrc->connection_speed = DEFAULT_CONNECTION_SPEED; urisrc->buffer_duration = DEFAULT_BUFFER_DURATION; urisrc->buffer_size = DEFAULT_BUFFER_SIZE; urisrc->download = DEFAULT_DOWNLOAD; urisrc->use_buffering = DEFAULT_USE_BUFFERING; urisrc->ring_buffer_max_size = DEFAULT_RING_BUFFER_MAX_SIZE; urisrc->last_buffering_pct = -1; urisrc->low_watermark = DEFAULT_LOW_WATERMARK; urisrc->high_watermark = DEFAULT_HIGH_WATERMARK; GST_OBJECT_FLAG_SET (urisrc, GST_ELEMENT_FLAG_SOURCE | GST_BIN_FLAG_STREAMS_AWARE); gst_bin_set_suppressed_flags (GST_BIN (urisrc), GST_ELEMENT_FLAG_SOURCE | GST_ELEMENT_FLAG_SINK); } static void gst_uri_source_bin_finalize (GObject * obj) { GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (obj); g_mutex_clear (&urisrc->lock); g_mutex_clear (&urisrc->buffering_lock); g_mutex_clear (&urisrc->buffering_post_lock); g_free (urisrc->uri); G_OBJECT_CLASS (parent_class)->finalize (obj); } static void gst_uri_source_bin_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (object); switch (prop_id) { case PROP_URI: GST_OBJECT_LOCK (urisrc); g_free (urisrc->uri); urisrc->uri = g_value_dup_string (value); GST_OBJECT_UNLOCK (urisrc); break; case PROP_CONNECTION_SPEED: GST_OBJECT_LOCK (urisrc); urisrc->connection_speed = g_value_get_uint64 (value) * 1000; GST_OBJECT_UNLOCK (urisrc); break; case PROP_BUFFER_SIZE: urisrc->buffer_size = g_value_get_int (value); update_queue_values (urisrc); break; case PROP_BUFFER_DURATION: urisrc->buffer_duration = g_value_get_int64 (value); update_queue_values (urisrc); break; case PROP_DOWNLOAD: urisrc->download = g_value_get_boolean (value); break; case PROP_USE_BUFFERING: urisrc->use_buffering = g_value_get_boolean (value); break; case PROP_RING_BUFFER_MAX_SIZE: urisrc->ring_buffer_max_size = g_value_get_uint64 (value); break; case PROP_LOW_WATERMARK: urisrc->low_watermark = g_value_get_double (value); update_queue_values (urisrc); break; case PROP_HIGH_WATERMARK: urisrc->high_watermark = g_value_get_double (value); update_queue_values (urisrc); break; case PROP_PARSE_STREAMS: urisrc->parse_streams = g_value_get_boolean (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_uri_source_bin_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (object); switch (prop_id) { case PROP_URI: GST_OBJECT_LOCK (urisrc); g_value_set_string (value, urisrc->uri); GST_OBJECT_UNLOCK (urisrc); break; case PROP_SOURCE: GST_OBJECT_LOCK (urisrc); g_value_set_object (value, urisrc->source); GST_OBJECT_UNLOCK (urisrc); break; case PROP_CONNECTION_SPEED: GST_OBJECT_LOCK (urisrc); g_value_set_uint64 (value, urisrc->connection_speed / 1000); GST_OBJECT_UNLOCK (urisrc); break; case PROP_BUFFER_SIZE: GST_OBJECT_LOCK (urisrc); g_value_set_int (value, urisrc->buffer_size); GST_OBJECT_UNLOCK (urisrc); break; case PROP_BUFFER_DURATION: GST_OBJECT_LOCK (urisrc); g_value_set_int64 (value, urisrc->buffer_duration); GST_OBJECT_UNLOCK (urisrc); break; case PROP_DOWNLOAD: g_value_set_boolean (value, urisrc->download); break; case PROP_USE_BUFFERING: g_value_set_boolean (value, urisrc->use_buffering); break; case PROP_RING_BUFFER_MAX_SIZE: g_value_set_uint64 (value, urisrc->ring_buffer_max_size); break; case PROP_LOW_WATERMARK: g_value_set_double (value, urisrc->low_watermark); break; case PROP_HIGH_WATERMARK: g_value_set_double (value, urisrc->high_watermark); break; case PROP_STATISTICS: g_value_take_boxed (value, get_queue_statistics (urisrc)); break; case PROP_PARSE_STREAMS: g_value_set_boolean (value, urisrc->parse_streams); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean copy_sticky_events (GstPad * pad, GstEvent ** event, gpointer user_data) { GstPad *gpad = GST_PAD_CAST (user_data); GST_DEBUG_OBJECT (gpad, "store sticky event %" GST_PTR_FORMAT, *event); gst_pad_store_sticky_event (gpad, *event); return TRUE; } static GstPadProbeReturn demux_pad_events (GstPad * pad, GstPadProbeInfo * info, OutputSlotInfo * slot); /* CALL WITH URISOURCEBIN LOCK */ static void free_child_src_pad_info (ChildSrcPadInfo * info, GstURISourceBin * urisrc) { g_assert (info->src_pad); GST_DEBUG_OBJECT (urisrc, "Freeing ChildSrcPadInfo for %" GST_PTR_FORMAT, info->src_pad); if (info->typefind) { gst_element_set_state (info->typefind, GST_STATE_NULL); gst_bin_remove (GST_BIN_CAST (urisrc), info->typefind); } gst_object_unref (info->src_pad); if (info->demuxer) { GST_DEBUG_OBJECT (urisrc, "Removing demuxer"); gst_element_set_state (info->demuxer, GST_STATE_NULL); gst_bin_remove (GST_BIN_CAST (urisrc), info->demuxer); } g_list_foreach (info->outputs, (GFunc) free_output_slot, urisrc); g_list_free (info->outputs); if (info->multiqueue) { GST_DEBUG_OBJECT (urisrc, "Removing multiqueue"); gst_element_set_state (info->multiqueue, GST_STATE_NULL); remove_buffering_msgs (urisrc, GST_OBJECT_CAST (info->multiqueue)); gst_bin_remove (GST_BIN_CAST (urisrc), info->multiqueue); } if (info->pre_parse_queue) { gst_element_set_state (info->pre_parse_queue, GST_STATE_NULL); remove_buffering_msgs (urisrc, GST_OBJECT_CAST (info->pre_parse_queue)); gst_bin_remove (GST_BIN_CAST (urisrc), info->pre_parse_queue); } g_free (info); } static ChildSrcPadInfo * get_cspi_for_pad (GstURISourceBin * urisrc, GstPad * pad) { GList *iter; for (iter = urisrc->src_infos; iter; iter = iter->next) { ChildSrcPadInfo *info = iter->data; if (info->src_pad == pad) return info; } return NULL; } static ChildSrcPadInfo * new_child_src_pad_info (GstURISourceBin * urisrc, GstPad * pad) { ChildSrcPadInfo *info; GST_LOG_OBJECT (urisrc, "New ChildSrcPadInfo for %" GST_PTR_FORMAT, pad); info = g_new0 (ChildSrcPadInfo, 1); info->urisrc = urisrc; info->src_pad = gst_object_ref (pad); urisrc->src_infos = g_list_append (urisrc->src_infos, info); return info; } /* Called by the signal handlers when a demuxer has produced a new stream */ static void new_demuxer_pad_added_cb (GstElement * element, GstPad * pad, ChildSrcPadInfo * info) { GstURISourceBin *urisrc = info->urisrc; OutputSlotInfo *slot; GstPad *output_pad; GST_DEBUG_OBJECT (element, "New pad %" GST_PTR_FORMAT, pad); GST_URI_SOURCE_BIN_LOCK (urisrc); /* Double-check that the demuxer is streams-aware by checking if it posted a * collection */ if (info->demuxer && !info->demuxer_is_parsebin && !info->demuxer_streams_aware) { GST_ELEMENT_ERROR (urisrc, CORE, MISSING_PLUGIN, (NULL), ("Adaptive demuxer is not streams-aware, check your installation")); } /* If the demuxer handles buffering and is streams-aware, we can expose it as-is directly. We still add an event probe to deal with EOS */ slot = new_output_slot (info, pad); output_pad = gst_object_ref (slot->output_pad); slot->demuxer_event_probe_id = gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM | GST_PAD_PROBE_TYPE_EVENT_FLUSH, (GstPadProbeCallback) demux_pad_events, slot, NULL); GST_URI_SOURCE_BIN_UNLOCK (urisrc); expose_output_pad (urisrc, output_pad); gst_object_unref (output_pad); } /* Called with lock held */ static gboolean all_slots_are_eos (GstURISourceBin * urisrc) { GList *tmp; for (tmp = urisrc->src_infos; tmp; tmp = tmp->next) { ChildSrcPadInfo *cspi = tmp->data; GList *iter2; for (iter2 = cspi->outputs; iter2; iter2 = iter2->next) { OutputSlotInfo *slot = (OutputSlotInfo *) iter2->data; if (slot->is_eos == FALSE) return FALSE; } } return TRUE; } /* CALL WITH URISOURCEBIN LOCK */ static OutputSlotInfo * output_slot_for_originating_pad (ChildSrcPadInfo * info, GstPad * originating_pad) { GList *iter; for (iter = info->outputs; iter; iter = iter->next) { OutputSlotInfo *slot = iter->data; if (slot->originating_pad == originating_pad) return slot; } return NULL; } static GstPadProbeReturn demux_pad_events (GstPad * pad, GstPadProbeInfo * info, OutputSlotInfo * slot) { GstURISourceBin *urisrc = slot->linked_info->urisrc; GstPadProbeReturn ret = GST_PAD_PROBE_OK; GstEvent *ev = GST_PAD_PROBE_INFO_EVENT (info); GST_URI_SOURCE_BIN_LOCK (urisrc); switch (GST_EVENT_TYPE (ev)) { case GST_EVENT_EOS: { gboolean all_streams_eos; GST_LOG_OBJECT (urisrc, "EOS on pad %" GST_PTR_FORMAT, pad); BUFFERING_LOCK (urisrc); /* Mark that we fed an EOS to this slot */ slot->is_eos = TRUE; all_streams_eos = all_slots_are_eos (urisrc); BUFFERING_UNLOCK (urisrc); if (slot->queue) /* EOS means this element is no longer buffering */ remove_buffering_msgs (urisrc, GST_OBJECT_CAST (slot->queue)); if (all_streams_eos) { GST_DEBUG_OBJECT (urisrc, "Posting about-to-finish"); g_signal_emit (urisrc, gst_uri_source_bin_signals[SIGNAL_ABOUT_TO_FINISH], 0, NULL); } } break; case GST_EVENT_STREAM_START: { /* This is a temporary hack to notify downstream decodebin3 to *not* * plug in an extra parsebin */ if (slot->linked_info && slot->linked_info->demuxer_is_parsebin) { GstStructure *s; GST_PAD_PROBE_INFO_DATA (info) = ev = gst_event_make_writable (ev); s = (GstStructure *) gst_event_get_structure (ev); gst_structure_set (s, "urisourcebin-parsed-data", G_TYPE_BOOLEAN, TRUE, NULL); } } /* PASSTHROUGH */ case GST_EVENT_FLUSH_STOP: BUFFERING_LOCK (urisrc); slot->is_eos = FALSE; BUFFERING_UNLOCK (urisrc); break; default: break; } GST_URI_SOURCE_BIN_UNLOCK (urisrc); return ret; } static GstPadProbeReturn pre_queue_event_probe (GstPad * pad, GstPadProbeInfo * info, gpointer user_data) { GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (user_data); GstPadProbeReturn ret = GST_PAD_PROBE_OK; GstEvent *ev = GST_PAD_PROBE_INFO_EVENT (info); switch (GST_EVENT_TYPE (ev)) { case GST_EVENT_EOS: { GST_LOG_OBJECT (urisrc, "EOS on pad %" GST_PTR_FORMAT, pad); GST_DEBUG_OBJECT (urisrc, "POSTING ABOUT TO FINISH"); g_signal_emit (urisrc, gst_uri_source_bin_signals[SIGNAL_ABOUT_TO_FINISH], 0, NULL); } break; default: break; } return ret; } static GstStructure * get_queue_statistics (GstURISourceBin * urisrc) { GstStructure *ret = NULL; guint min_byte_level = 0, max_byte_level = 0; guint64 min_time_level = 0, max_time_level = 0; gdouble avg_byte_level = 0., avg_time_level = 0.; guint i = 0; GList *iter, *cur; GST_URI_SOURCE_BIN_LOCK (urisrc); for (iter = urisrc->src_infos; iter; iter = iter->next) { ChildSrcPadInfo *info = iter->data; for (cur = info->outputs; cur; cur = cur->next) { OutputSlotInfo *slot = (OutputSlotInfo *) (cur->data); guint byte_limit = 0; guint64 time_limit = 0; if (!slot->queue) continue; g_object_get (slot->queue, "current-level-bytes", &byte_limit, "current-level-time", &time_limit, NULL); if (byte_limit < min_byte_level) min_byte_level = byte_limit; if (byte_limit > max_byte_level) max_byte_level = byte_limit; avg_byte_level = (avg_byte_level * i + byte_limit) / (gdouble) (i + 1); if (time_limit < min_time_level) min_time_level = time_limit; if (time_limit > max_time_level) max_time_level = time_limit; avg_time_level = (avg_time_level * i + time_limit) / (gdouble) (i + 1); i++; } } GST_URI_SOURCE_BIN_UNLOCK (urisrc); ret = gst_structure_new ("application/x-urisourcebin-stats", "minimum-byte-level", G_TYPE_UINT, (guint) min_byte_level, "maximum-byte-level", G_TYPE_UINT, (guint) max_byte_level, "average-byte-level", G_TYPE_UINT, (guint) avg_byte_level, "minimum-time-level", G_TYPE_UINT64, (guint64) min_time_level, "maximum-time-level", G_TYPE_UINT64, (guint64) max_time_level, "average-time-level", G_TYPE_UINT64, (guint64) avg_time_level, NULL); return ret; } static void update_queue_values (GstURISourceBin * urisrc) { gint64 duration; guint buffer_size; gdouble low_watermark, high_watermark; guint64 cumulative_bitrate = 0; GList *iter, *cur; GST_URI_SOURCE_BIN_LOCK (urisrc); duration = GET_BUFFER_DURATION (urisrc); buffer_size = GET_BUFFER_SIZE (urisrc); low_watermark = urisrc->low_watermark; high_watermark = urisrc->high_watermark; for (iter = urisrc->src_infos; iter; iter = iter->next) { ChildSrcPadInfo *info = iter->data; for (cur = info->outputs; cur; cur = cur->next) { OutputSlotInfo *slot = (OutputSlotInfo *) (cur->data); guint64 bitrate = 0; if (!slot->queue) continue; if (g_object_class_find_property (G_OBJECT_GET_CLASS (slot->queue), "bitrate")) { g_object_get (G_OBJECT (slot->queue), "bitrate", &bitrate, NULL); } if (bitrate > 0) cumulative_bitrate += bitrate; else { GST_TRACE_OBJECT (urisrc, "Unknown bitrate detected from %" GST_PTR_FORMAT ", resetting all bitrates", slot->queue); cumulative_bitrate = 0; break; } } } GST_DEBUG_OBJECT (urisrc, "recalculating queue limits with cumulative " "bitrate %" G_GUINT64_FORMAT ", buffer size %u, buffer duration %" G_GINT64_FORMAT, cumulative_bitrate, buffer_size, duration); for (iter = urisrc->src_infos; iter; iter = iter->next) { ChildSrcPadInfo *info = iter->data; for (cur = info->outputs; cur; cur = cur->next) { OutputSlotInfo *slot = (OutputSlotInfo *) (cur->data); guint byte_limit; if (!slot->queue) continue; if (cumulative_bitrate > 0 && g_object_class_find_property (G_OBJECT_GET_CLASS (slot->queue), "bitrate")) { guint64 bitrate; g_object_get (G_OBJECT (slot->queue), "bitrate", &bitrate, NULL); byte_limit = gst_util_uint64_scale (buffer_size, bitrate, cumulative_bitrate); } else { /* if not all queue's have valid bitrates, use the buffer-size as the * limit */ byte_limit = buffer_size; } GST_DEBUG_OBJECT (urisrc, "calculated new limits for queue-like element %" GST_PTR_FORMAT ", bytes:%u, time:%" G_GUINT64_FORMAT ", low-watermark:%f, high-watermark:%f", slot->queue, byte_limit, (guint64) duration, low_watermark, high_watermark); g_object_set (G_OBJECT (slot->queue), "max-size-bytes", byte_limit, "max-size-time", (guint64) duration, "low-watermark", low_watermark, "high-watermark", high_watermark, NULL); } } GST_URI_SOURCE_BIN_UNLOCK (urisrc); } static void on_queue_bitrate_changed (GstElement * queue, GParamSpec * pspec, gpointer user_data) { GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (user_data); gst_element_call_async (GST_ELEMENT (urisrc), (GstElementCallAsyncFunc) update_queue_values, NULL, NULL); } static void setup_downloadbuffer (GstURISourceBin * urisrc, GstElement * downloadbuffer) { gchar *temp_template, *filename; const gchar *tmp_dir, *prgname; tmp_dir = g_get_user_cache_dir (); prgname = g_get_prgname (); if (prgname == NULL) prgname = "GStreamer"; filename = g_strdup_printf ("%s-XXXXXX", prgname); /* build our filename */ temp_template = g_build_filename (tmp_dir, filename, NULL); GST_DEBUG_OBJECT (urisrc, "enable download buffering in %s (%s, %s, %s)", temp_template, tmp_dir, prgname, filename); /* configure progressive download for selected media types */ g_object_set (downloadbuffer, "temp-template", temp_template, NULL); g_free (filename); g_free (temp_template); } static void setup_multiqueue (GstURISourceBin * urisrc, ChildSrcPadInfo * info, GstElement * multiqueue) { if (info->use_downloadbuffer || !urisrc->is_stream) { /* If we have a downloadbuffer we will let that one deal with buffering, and we only use multiqueue for dealing with interleave */ g_object_set (info->multiqueue, "use-buffering", FALSE, NULL); } else { /* Else we set the minimum interleave time of multiqueue to the required * buffering duration and ask it to report buffering */ g_object_set (info->multiqueue, "use-buffering", TRUE, "min-interleave-time", GET_BUFFER_DURATION (urisrc), NULL); } /* Common properties */ g_object_set (info->multiqueue, "sync-by-running-time", TRUE, "use-interleave", TRUE, "max-size-bytes", 0, "max-size-buffers", 0, "low-watermark", urisrc->low_watermark, "high-watermark", urisrc->high_watermark, NULL); gst_bin_add (GST_BIN_CAST (urisrc), info->multiqueue); gst_element_sync_state_with_parent (info->multiqueue); } /* Called with lock held */ static OutputSlotInfo * new_output_slot (ChildSrcPadInfo * info, GstPad * originating_pad) { GstURISourceBin *urisrc = info->urisrc; OutputSlotInfo *slot; GstPad *srcpad; GstElement *queue = NULL; const gchar *elem_name; gboolean use_downloadbuffer; GST_DEBUG_OBJECT (urisrc, "use_queue2:%d use_downloadbuffer:%d, demuxer:%d, originating_pad:%" GST_PTR_FORMAT, info->use_queue2, info->use_downloadbuffer, info->demuxer != NULL, originating_pad); slot = g_new0 (OutputSlotInfo, 1); slot->linked_info = info; /* If a demuxer/parsebin is present, then the downloadbuffer will have been handled before that */ use_downloadbuffer = info->use_downloadbuffer && !info->demuxer; /* If parsebin is used, we might have to go through a multiqueue */ if (urisrc->parse_streams && (info->use_queue2 || info->use_downloadbuffer || !urisrc->is_stream)) { GST_DEBUG_OBJECT (urisrc, "Using multiqueue"); if (!info->multiqueue) { GST_DEBUG_OBJECT (urisrc, "Creating multiqueue for handling elementary streams"); elem_name = "multiqueue"; info->multiqueue = gst_element_factory_make (elem_name, NULL); if (!info->multiqueue) goto no_buffer_element; setup_multiqueue (urisrc, info, info->multiqueue); } slot->queue_sinkpad = gst_element_request_pad_simple (info->multiqueue, "sink_%u"); srcpad = gst_pad_get_single_internal_link (slot->queue_sinkpad); slot->output_pad = create_output_pad (slot, srcpad); gst_object_unref (srcpad); gst_pad_link (originating_pad, slot->queue_sinkpad); } /* If buffering is required, create the element. If downloadbuffer is * required, it will take precedence over queue2 */ else if (use_downloadbuffer || info->use_queue2) { if (use_downloadbuffer) elem_name = "downloadbuffer"; else elem_name = "queue2"; queue = gst_element_factory_make (elem_name, NULL); if (!queue) goto no_buffer_element; slot->queue = queue; slot->bitrate_changed_id = g_signal_connect (G_OBJECT (queue), "notify::bitrate", (GCallback) on_queue_bitrate_changed, urisrc); if (use_downloadbuffer) { setup_downloadbuffer (urisrc, slot->queue); } else { g_object_set (queue, "use-buffering", urisrc->use_buffering, NULL); if (info->demuxer) { /* If a adaptive demuxer or parsebin is used, use more accurate information */ g_object_set (queue, "use-tags-bitrate", TRUE, "use-rate-estimate", FALSE, NULL); } else { GST_DEBUG_OBJECT (queue, "Setting ring-buffer-max-size %" G_GUINT64_FORMAT, urisrc->ring_buffer_max_size); /* Else allow ring-buffer-max-size setting to be used */ g_object_set (queue, "ring-buffer-max-size", urisrc->ring_buffer_max_size, NULL); } /* Disable max-size-buffers - queue based on data rate to the default time limit */ g_object_set (queue, "max-size-buffers", 0, NULL); /* Don't start buffering until the queue is empty (< 1%). * Start playback when the queue is 60% full, leaving a bit more room * for upstream to push more without getting bursty */ g_object_set (queue, "low-percent", 1, "high-percent", 60, NULL); g_object_set (queue, "low-watermark", urisrc->low_watermark, "high-watermark", urisrc->high_watermark, NULL); } /* set the necessary limits on the queue-like elements */ g_object_set (queue, "max-size-bytes", GET_BUFFER_SIZE (urisrc), "max-size-time", (guint64) GET_BUFFER_DURATION (urisrc), NULL); gst_bin_add (GST_BIN_CAST (urisrc), queue); gst_element_sync_state_with_parent (queue); slot->queue_sinkpad = gst_element_get_static_pad (queue, "sink"); /* get the new raw srcpad */ srcpad = gst_element_get_static_pad (queue, "src"); slot->output_pad = create_output_pad (slot, srcpad); gst_object_unref (srcpad); gst_pad_link (originating_pad, slot->queue_sinkpad); } else { /* Expose pad directly */ slot->output_pad = create_output_pad (slot, originating_pad); } slot->originating_pad = gst_object_ref (originating_pad); /* save output slot so we can remove it later */ info->outputs = g_list_append (info->outputs, slot); GST_DEBUG_OBJECT (urisrc, "New output_pad %" GST_PTR_FORMAT " for originating pad %" GST_PTR_FORMAT, slot->output_pad, originating_pad); return slot; no_buffer_element: { g_free (slot); post_missing_plugin_error (GST_ELEMENT_CAST (urisrc), elem_name); return NULL; } } static GstPadProbeReturn source_pad_event_probe (GstPad * pad, GstPadProbeInfo * info, gpointer user_data) { GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info); OutputSlotInfo *slot = user_data; GstURISourceBin *urisrc = slot->linked_info->urisrc; GST_LOG_OBJECT (pad, "%" GST_PTR_FORMAT, event); /* A custom EOS will be received if an adaptive demuxer source pad removed a * pad and buffering was present on that slot */ if (GST_EVENT_TYPE (event) == GST_EVENT_EOS && gst_mini_object_get_qdata (GST_MINI_OBJECT_CAST (event), CUSTOM_EOS_QUARK)) { GstPadProbeReturn probe_ret = GST_PAD_PROBE_DROP; GST_DEBUG_OBJECT (pad, "we received custom EOS"); /* remove custom-eos */ gst_mini_object_set_qdata (GST_MINI_OBJECT_CAST (event), CUSTOM_EOS_QUARK, NULL, NULL); GST_URI_SOURCE_BIN_LOCK (urisrc); if (slot->is_eos) { /* linked_info is old input which is still linked without removal */ GST_DEBUG_OBJECT (pad, "push actual EOS"); gst_pad_push_event (slot->output_pad, event); probe_ret = GST_PAD_PROBE_HANDLED; } /* And finally remove the output. This is done asynchronously since we can't * do it from the streaming thread */ free_output_slot_async (urisrc, slot); GST_URI_SOURCE_BIN_UNLOCK (urisrc); return probe_ret; } /* never drop events */ return GST_PAD_PROBE_OK; } /* called when we found a raw pad to expose. We set up a * padprobe to detect EOS before exposing the pad. * Called with LOCK held. */ static GstPad * create_output_pad (OutputSlotInfo * slot, GstPad * pad) { GstURISourceBin *urisrc = slot->linked_info->urisrc; GstPad *newpad; GstPadTemplate *pad_tmpl; gchar *padname; /* If the output slot does buffering, add a probe to detect drainage */ if (slot->queue) gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM, source_pad_event_probe, slot, NULL); pad_tmpl = gst_static_pad_template_get (&srctemplate); padname = g_strdup_printf ("src_%u", urisrc->numpads); urisrc->numpads++; newpad = gst_ghost_pad_new_from_template (padname, pad, pad_tmpl); gst_object_unref (pad_tmpl); g_free (padname); GST_DEBUG_OBJECT (urisrc, "Created output pad %s:%s for pad %s:%s", GST_DEBUG_PAD_NAME (newpad), GST_DEBUG_PAD_NAME (pad)); return newpad; } static GstPadProbeReturn expose_block_probe (GstPad * pad, GstPadProbeInfo * info, gpointer user_data) { GstURISourceBin *urisrc = (GstURISourceBin *) user_data; gboolean expose = FALSE; GST_DEBUG_OBJECT (pad, "blocking"); GST_URI_SOURCE_BIN_LOCK (urisrc); while (!urisrc->activated && !urisrc->flushing) { GST_DEBUG_OBJECT (urisrc, "activated:%d flushing:%d", urisrc->activated, urisrc->flushing); g_cond_wait (&urisrc->activation_cond, &urisrc->lock); } GST_DEBUG_OBJECT (urisrc, "activated:%d flushing:%d", urisrc->activated, urisrc->flushing); if (!urisrc->flushing) expose = TRUE; GST_URI_SOURCE_BIN_UNLOCK (urisrc); if (expose) gst_element_add_pad (GST_ELEMENT_CAST (urisrc), pad); GST_DEBUG_OBJECT (pad, "Done blocking, removing probe"); return GST_PAD_PROBE_REMOVE; } static void expose_output_pad (GstURISourceBin * urisrc, GstPad * pad) { GstPad *target; if (gst_object_has_as_parent (GST_OBJECT (pad), GST_OBJECT (urisrc))) return; /* Pad is already exposed */ target = gst_ghost_pad_get_target (GST_GHOST_PAD (pad)); gst_pad_sticky_events_foreach (target, copy_sticky_events, pad); gst_object_unref (target); gst_pad_set_active (pad, TRUE); GST_URI_SOURCE_BIN_LOCK (urisrc); if (!urisrc->activated) { GST_DEBUG_OBJECT (urisrc, "Not fully activated, adding pad once PAUSED !"); gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM, expose_block_probe, urisrc, NULL); pad = NULL; } GST_URI_SOURCE_BIN_UNLOCK (urisrc); if (pad) { GST_DEBUG_OBJECT (urisrc, "Exposing pad %" GST_PTR_FORMAT, pad); gst_element_add_pad (GST_ELEMENT_CAST (urisrc), pad); } } static void demuxer_pad_removed_cb (GstElement * element, GstPad * pad, ChildSrcPadInfo * info) { GstURISourceBin *urisrc; OutputSlotInfo *slot; /* we only care about srcpads */ if (!GST_PAD_IS_SRC (pad)) return; urisrc = info->urisrc; GST_DEBUG_OBJECT (urisrc, "pad removed name: <%s:%s>", GST_DEBUG_PAD_NAME (pad)); GST_URI_SOURCE_BIN_LOCK (urisrc); slot = output_slot_for_originating_pad (info, pad); g_assert (slot); gst_pad_remove_probe (pad, slot->demuxer_event_probe_id); slot->demuxer_event_probe_id = 0; if (slot->queue) { gboolean was_eos; /* Propagate custom EOS to buffering elements. The slot will be removed when * it is received on the output of the buffering elements */ BUFFERING_LOCK (urisrc); /* Unlink this pad from its output slot and send a fake EOS event * to drain the queue */ was_eos = slot->is_eos; slot->is_eos = TRUE; BUFFERING_UNLOCK (urisrc); remove_buffering_msgs (urisrc, GST_OBJECT_CAST (slot->queue)); if (!was_eos) { GstStructure *s; GstEvent *event; event = gst_event_new_eos (); s = gst_event_writable_structure (event); gst_structure_set (s, "urisourcebin-custom-eos", G_TYPE_BOOLEAN, TRUE, NULL); gst_pad_send_event (slot->queue_sinkpad, event); } } else { GST_LOG_OBJECT (urisrc, "No buffering involved, removing output slot immediately"); /* Remove output slot immediately */ info->outputs = g_list_remove (info->outputs, slot); free_output_slot (slot, urisrc); } GST_URI_SOURCE_BIN_UNLOCK (urisrc); 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; } static gboolean array_has_uri_value (const gchar * values[], const gchar * value) { gint i; for (i = 0; values[i]; i++) { if (!g_ascii_strncasecmp (value, values[i], strlen (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://", "https://", "mms://", "mmsh://", "mmsu://", "mmst://", "fd://", "myth://", "ssh://", "ftp://", "sftp://", NULL }; /* list of URIs that need a queue because they are pretty bursty */ static const gchar *queue_uris[] = { "cdda://", NULL }; /* blacklisted URIs, we know they will always fail. */ static const gchar *blacklisted_uris[] = { NULL }; /* media types that use adaptive streaming */ static const gchar *adaptive_media[] = { "application/x-hls", "application/vnd.ms-sstr+xml", "application/dash+xml", NULL }; #define IS_STREAM_URI(uri) (array_has_uri_value (stream_uris, uri)) #define IS_QUEUE_URI(uri) (array_has_uri_value (queue_uris, uri)) #define IS_BLACKLISTED_URI(uri) (array_has_uri_value (blacklisted_uris, uri)) #define IS_ADAPTIVE_MEDIA(media) (array_has_value (adaptive_media, media)) /* * Generate and configure a source element. */ static GstElement * gen_source_element (GstURISourceBin * urisrc) { GObjectClass *source_class; GstElement *source; GParamSpec *pspec; GstQuery *query; GstSchedulingFlags flags; GError *err = NULL; if (!urisrc->uri) goto no_uri; GST_LOG_OBJECT (urisrc, "finding source for %s", urisrc->uri); if (!gst_uri_is_valid (urisrc->uri)) goto invalid_uri; if (IS_BLACKLISTED_URI (urisrc->uri)) goto uri_blacklisted; source = gst_element_make_from_uri (GST_URI_SRC, urisrc->uri, NULL, &err); if (!source) goto no_source; GST_LOG_OBJECT (urisrc, "found source type %s", G_OBJECT_TYPE_NAME (source)); urisrc->is_stream = IS_STREAM_URI (urisrc->uri); query = gst_query_new_scheduling (); if (gst_element_query (source, query)) { gst_query_parse_scheduling (query, &flags, NULL, NULL, NULL); if ((flags & GST_SCHEDULING_FLAG_BANDWIDTH_LIMITED)) urisrc->is_stream = TRUE; } gst_query_unref (query); source_class = G_OBJECT_GET_CLASS (source); if (urisrc->is_stream) { /* Live sources are not streamable */ pspec = g_object_class_find_property (source_class, "is-live"); if (pspec && G_PARAM_SPEC_VALUE_TYPE (pspec) == G_TYPE_BOOLEAN) { gboolean is_live; g_object_get (G_OBJECT (source), "is-live", &is_live, NULL); if (is_live) urisrc->is_stream = FALSE; } } GST_LOG_OBJECT (urisrc, "source is stream: %d", urisrc->is_stream); pspec = g_object_class_find_property (source_class, "connection-speed"); if (pspec != NULL) { guint64 speed = urisrc->connection_speed / 1000; gboolean wrong_type = FALSE; if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_UINT) { GParamSpecUInt *pspecuint = G_PARAM_SPEC_UINT (pspec); speed = CLAMP (speed, pspecuint->minimum, pspecuint->maximum); } else if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_INT) { GParamSpecInt *pspecint = G_PARAM_SPEC_INT (pspec); speed = CLAMP (speed, pspecint->minimum, pspecint->maximum); } else if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_UINT64) { GParamSpecUInt64 *pspecuint = G_PARAM_SPEC_UINT64 (pspec); speed = CLAMP (speed, pspecuint->minimum, pspecuint->maximum); } else if (G_PARAM_SPEC_TYPE (pspec) == G_TYPE_PARAM_INT64) { GParamSpecInt64 *pspecint = G_PARAM_SPEC_INT64 (pspec); speed = CLAMP (speed, pspecint->minimum, pspecint->maximum); } else { GST_WARNING_OBJECT (urisrc, "The connection speed property %" G_GUINT64_FORMAT " of type %s is not useful. Not setting it", speed, g_type_name (G_PARAM_SPEC_TYPE (pspec))); wrong_type = TRUE; } if (!wrong_type) { g_object_set (source, "connection-speed", speed, NULL); GST_DEBUG_OBJECT (urisrc, "setting connection-speed=%" G_GUINT64_FORMAT " to source element", speed); } } return source; /* ERRORS */ no_uri: { GST_ELEMENT_ERROR (urisrc, RESOURCE, NOT_FOUND, (_("No URI specified to play from.")), (NULL)); return NULL; } invalid_uri: { GST_ELEMENT_ERROR (urisrc, RESOURCE, NOT_FOUND, (_("Invalid URI \"%s\"."), urisrc->uri), (NULL)); g_clear_error (&err); return NULL; } uri_blacklisted: { GST_ELEMENT_ERROR (urisrc, RESOURCE, FAILED, (_("This stream type cannot be played yet.")), (NULL)); return NULL; } no_source: { /* whoops, could not create the source element, dig a little deeper to * figure out what might be wrong. */ if (err != NULL && err->code == GST_URI_ERROR_UNSUPPORTED_PROTOCOL) { gchar *prot; prot = gst_uri_get_protocol (urisrc->uri); if (prot == NULL) goto invalid_uri; gst_element_post_message (GST_ELEMENT_CAST (urisrc), gst_missing_uri_source_message_new (GST_ELEMENT (urisrc), prot)); GST_ELEMENT_ERROR (urisrc, CORE, MISSING_PLUGIN, (_("No URI handler implemented for \"%s\"."), prot), (NULL)); g_free (prot); } else { GST_ELEMENT_ERROR (urisrc, RESOURCE, NOT_FOUND, ("%s", (err) ? err->message : "URI was not accepted by any element"), ("No element accepted URI '%s'", urisrc->uri)); } g_clear_error (&err); return NULL; } } static gboolean is_all_raw_caps (GstCaps * caps, GstCaps * rawcaps, gboolean * all_raw) { GstCaps *intersection; gint capssize; gboolean res = FALSE; 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; intersection = gst_caps_intersect (caps, rawcaps); *all_raw = !gst_caps_is_empty (intersection) && (gst_caps_get_size (intersection) == capssize); gst_caps_unref (intersection); res = TRUE; done: return res; } static void post_missing_plugin_error (GstElement * urisrc, const gchar * element_name) { GstMessage *msg; msg = gst_missing_element_message_new (urisrc, element_name); gst_element_post_message (urisrc, msg); GST_ELEMENT_ERROR (urisrc, CORE, MISSING_PLUGIN, (_("Missing element '%s' - check your GStreamer installation."), element_name), (NULL)); } typedef struct { GstURISourceBin *urisrc; gboolean have_out; gboolean res; } AnalyseData; static void analyse_pad_foreach (const GValue * item, AnalyseData * data) { GstURISourceBin *urisrc = data->urisrc; GstPad *pad = g_value_dup_object (item); ChildSrcPadInfo *info; GstCaps *padcaps = NULL; gboolean pad_is_raw; gboolean res = TRUE; GST_LOG_OBJECT (urisrc, "pad %" GST_PTR_FORMAT, pad); data->have_out = TRUE; /* The info might already exist if there was an iterator resync */ if (get_cspi_for_pad (urisrc, pad)) { GST_LOG_OBJECT (urisrc, "Already analysed"); goto out; } info = new_child_src_pad_info (urisrc, pad); padcaps = gst_pad_query_caps (pad, NULL); if (!is_all_raw_caps (padcaps, DEFAULT_CAPS, &pad_is_raw) || !pad_is_raw) { /* if FALSE, this pad has no caps, we setup typefinding on it */ if (!setup_typefind (info)) { res = FALSE; goto out; } } else if (pad_is_raw) { /* caps on source pad are all raw, we can add the pad */ GstPad *output_pad; OutputSlotInfo *slot; GST_URI_SOURCE_BIN_LOCK (urisrc); /* Only use buffering (via queue2) on raw pads in very specific * conditions */ info->use_queue2 = urisrc->use_buffering && IS_QUEUE_URI (urisrc->uri); GST_DEBUG_OBJECT (urisrc, "use_buffering:%d is_queue:%d", urisrc->use_buffering, IS_QUEUE_URI (urisrc->uri)); slot = new_output_slot (info, pad); if (!slot) { res = FALSE; GST_URI_SOURCE_BIN_UNLOCK (urisrc); goto out; } /* get the new raw srcpad */ output_pad = gst_object_ref (slot->output_pad); GST_URI_SOURCE_BIN_UNLOCK (urisrc); expose_output_pad (urisrc, output_pad); gst_object_unref (output_pad); } else { GST_DEBUG_OBJECT (urisrc, "Handling non-raw pad"); /* The caps are non-raw, we handle it directly */ handle_new_pad (info, pad, padcaps); } out: if (padcaps) gst_caps_unref (padcaps); gst_object_unref (pad); data->res &= res; } /** * analyse_source_and_expose_raw_pads: * @urisrc: a #GstURISourceBin * @all_pads_raw: are all pads raw data * @have_out: does the source have output * @is_dynamic: is this a dynamic source * * Check the source of @urisrc and collect information about it. * * All pads will be handled directly. Raw pads are exposed as-is. Pads without * any caps will have a typefind appended to them, and other pads will be * analysed further. * * @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 @urisrc * * @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 occurred while scanning. */ static gboolean analyse_source_and_expose_raw_pads (GstURISourceBin * urisrc, gboolean * have_out, gboolean * is_dynamic) { GstElementClass *elemclass; AnalyseData data = { 0, }; GstIteratorResult iterres; GList *walk; GstIterator *pads_iter; gboolean res = TRUE; pads_iter = gst_element_iterate_src_pads (urisrc->source); restart: data.res = TRUE; data.have_out = FALSE; data.urisrc = urisrc; iterres = gst_iterator_foreach (pads_iter, (GstIteratorForeachFunction) analyse_pad_foreach, &data); if (iterres == GST_ITERATOR_RESYNC) goto restart; if (iterres == GST_ITERATOR_ERROR) res = FALSE; else res = data.res; gst_iterator_free (pads_iter); /* check for padtemplates that list SOMETIMES pads to * determine if the element is dynamic. */ *is_dynamic = FALSE; elemclass = GST_ELEMENT_GET_CLASS (urisrc->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); } *have_out = data.have_out; return res; } /* make a demuxer and connect to all the signals */ static GstElement * make_demuxer (GstURISourceBin * urisrc, ChildSrcPadInfo * info, GstCaps * caps) { GList *factories, *eligible, *cur; GstElement *demuxer = NULL; GParamSpec *pspec; GST_LOG_OBJECT (urisrc, "making new adaptive demuxer"); /* now create the demuxer element */ /* FIXME: Fire a signal to get the demuxer? */ factories = gst_element_factory_list_get_elements (GST_ELEMENT_FACTORY_TYPE_DEMUXER, GST_RANK_MARGINAL); eligible = gst_element_factory_list_filter (factories, caps, GST_PAD_SINK, gst_caps_is_fixed (caps)); gst_plugin_feature_list_free (factories); if (eligible == NULL) goto no_demuxer; eligible = g_list_sort (eligible, gst_plugin_feature_rank_compare_func); for (cur = eligible; cur != NULL; cur = g_list_next (cur)) { GstElementFactory *factory = (GstElementFactory *) (cur->data); const gchar *klass = gst_element_factory_get_metadata (factory, GST_ELEMENT_METADATA_KLASS); /* Can't be a demuxer unless it has Demux in the klass name */ if (!strstr (klass, "Demux") || !strstr (klass, "Adaptive")) continue; demuxer = gst_element_factory_create (factory, NULL); break; } gst_plugin_feature_list_free (eligible); if (!demuxer) goto no_demuxer; GST_DEBUG_OBJECT (urisrc, "Created adaptive demuxer %" GST_PTR_FORMAT, demuxer); /* set up callbacks to create the links between * demuxer streams and output */ g_signal_connect (demuxer, "pad-added", G_CALLBACK (new_demuxer_pad_added_cb), info); g_signal_connect (demuxer, "pad-removed", G_CALLBACK (demuxer_pad_removed_cb), info); /* Propagate connection-speed property */ pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (demuxer), "connection-speed"); if (pspec != NULL) g_object_set (demuxer, "connection-speed", urisrc->connection_speed / 1000, NULL); return demuxer; /* ERRORS */ no_demuxer: { /* FIXME: Fire the right error */ GST_ELEMENT_ERROR (urisrc, CORE, MISSING_PLUGIN, (NULL), ("No demuxer element, check your installation")); return NULL; } } static gboolean setup_parsebin_for_slot (ChildSrcPadInfo * info, GstPad * originating_pad) { GstURISourceBin *urisrc = info->urisrc; GstPad *sinkpad; GstPadLinkReturn link_res; GST_DEBUG_OBJECT (urisrc, "Setting up parsebin for %" GST_PTR_FORMAT, originating_pad); GST_STATE_LOCK (urisrc); GST_URI_SOURCE_BIN_LOCK (urisrc); /* Set up optional pre-parsebin download/ringbuffer elements */ if (info->use_downloadbuffer || urisrc->ring_buffer_max_size) { if (info->use_downloadbuffer) { GST_DEBUG_OBJECT (urisrc, "Setting up pre-parsebin downloadbuffer"); info->pre_parse_queue = gst_element_factory_make ("downloadbuffer", NULL); setup_downloadbuffer (urisrc, info->pre_parse_queue); g_object_set (info->pre_parse_queue, "max-size-bytes", GET_BUFFER_SIZE (urisrc), "max-size-time", (guint64) GET_BUFFER_DURATION (urisrc), NULL); } else if (urisrc->ring_buffer_max_size) { /* If a ring-buffer-max-size is specified with parsebin, we set it up on * the queue2 *before* parsebin. We will use its buffering levels instead * of the ones from multiqueue */ GST_DEBUG_OBJECT (urisrc, "Setting up pre-parsebin queue2 for ring-buffer-max-size %" G_GUINT64_FORMAT, urisrc->ring_buffer_max_size); info->pre_parse_queue = gst_element_factory_make ("queue2", NULL); /* We do not use this queue2 for buffering levels, but the multiqueue */ g_object_set (info->pre_parse_queue, "use-buffering", FALSE, "ring-buffer-max-size", urisrc->ring_buffer_max_size, "max-size-buffers", 0, NULL); } gst_element_set_locked_state (info->pre_parse_queue, TRUE); gst_bin_add (GST_BIN_CAST (urisrc), info->pre_parse_queue); sinkpad = gst_element_get_static_pad (info->pre_parse_queue, "sink"); link_res = gst_pad_link (originating_pad, sinkpad); gst_object_unref (sinkpad); if (link_res != GST_PAD_LINK_OK) goto could_not_link; } info->demuxer = gst_element_factory_make ("parsebin", NULL); if (!info->demuxer) { post_missing_plugin_error (GST_ELEMENT_CAST (urisrc), "parsebin"); return FALSE; } gst_element_set_locked_state (info->demuxer, TRUE); gst_bin_add (GST_BIN_CAST (urisrc), info->demuxer); info->demuxer_is_parsebin = TRUE; if (info->pre_parse_queue) { if (!gst_element_link_pads (info->pre_parse_queue, "src", info->demuxer, "sink")) goto could_not_link; } else { sinkpad = gst_element_get_static_pad (info->demuxer, "sink"); link_res = gst_pad_link (originating_pad, sinkpad); gst_object_unref (sinkpad); if (link_res != GST_PAD_LINK_OK) goto could_not_link; } /* set up callbacks to create the links between parsebin and output */ g_signal_connect (info->demuxer, "pad-added", G_CALLBACK (new_demuxer_pad_added_cb), info); g_signal_connect (info->demuxer, "pad-removed", G_CALLBACK (demuxer_pad_removed_cb), info); if (info->pre_parse_queue) { gst_element_set_locked_state (info->pre_parse_queue, FALSE); gst_element_sync_state_with_parent (info->pre_parse_queue); } gst_element_set_locked_state (info->demuxer, FALSE); gst_element_sync_state_with_parent (info->demuxer); GST_URI_SOURCE_BIN_UNLOCK (urisrc); GST_STATE_UNLOCK (urisrc); return TRUE; could_not_link: { if (info->pre_parse_queue) gst_element_set_locked_state (info->pre_parse_queue, FALSE); if (info->demuxer) gst_element_set_locked_state (info->demuxer, FALSE); GST_URI_SOURCE_BIN_UNLOCK (urisrc); GST_STATE_UNLOCK (urisrc); GST_ELEMENT_ERROR (urisrc, CORE, NEGOTIATION, (NULL), ("Can't link to (pre-)parsebin element")); return FALSE; } } /* Called when: * * Source element adds a new pad * * typefind has found a type */ static void handle_new_pad (ChildSrcPadInfo * info, GstPad * srcpad, GstCaps * caps) { GstURISourceBin *urisrc = info->urisrc; gboolean is_raw; GstStructure *s; const gchar *media_type; GST_URI_SOURCE_BIN_LOCK (urisrc); /* if this is a pad with all raw caps, we can expose it */ if (is_all_raw_caps (caps, DEFAULT_CAPS, &is_raw) && is_raw) { OutputSlotInfo *slot; GstPad *output_pad; GST_DEBUG_OBJECT (urisrc, "Found pad with raw caps %" GST_PTR_FORMAT ", exposing", caps); slot = new_output_slot (info, srcpad); output_pad = gst_object_ref (slot->output_pad); GST_URI_SOURCE_BIN_UNLOCK (urisrc); expose_output_pad (urisrc, slot->output_pad); gst_object_unref (output_pad); return; } GST_URI_SOURCE_BIN_UNLOCK (urisrc); s = gst_caps_get_structure (caps, 0); media_type = gst_structure_get_name (s); urisrc->is_adaptive = IS_ADAPTIVE_MEDIA (media_type); if (urisrc->is_adaptive) { GstPad *sinkpad; GstPadLinkReturn link_res; GstQuery *query; info->demuxer = make_demuxer (urisrc, info, caps); if (!info->demuxer) goto no_demuxer; gst_bin_add (GST_BIN_CAST (urisrc), info->demuxer); /* Query the demuxer to see if it can handle buffering */ query = gst_query_new_buffering (GST_FORMAT_TIME); info->use_queue2 = urisrc->use_buffering && !gst_element_query (info->demuxer, query); gst_query_unref (query); GST_DEBUG_OBJECT (urisrc, "Demuxer handles buffering : %d", info->demuxer_handles_buffering); sinkpad = gst_element_get_static_pad (info->demuxer, "sink"); if (sinkpad == NULL) goto no_demuxer_sink; link_res = gst_pad_link (srcpad, sinkpad); gst_object_unref (sinkpad); if (link_res != GST_PAD_LINK_OK) goto could_not_link; gst_element_sync_state_with_parent (info->demuxer); } else if (!urisrc->is_stream) { if (urisrc->parse_streams) { /* GST_URI_SOURCE_BIN_LOCK (urisrc); */ setup_parsebin_for_slot (info, srcpad); /* GST_URI_SOURCE_BIN_UNLOCK (urisrc); */ } else { /* We don't need buffering here, expose immediately */ OutputSlotInfo *slot; GstPad *output_pad; GST_URI_SOURCE_BIN_LOCK (urisrc); slot = new_output_slot (info, srcpad); output_pad = gst_object_ref (slot->output_pad); GST_URI_SOURCE_BIN_UNLOCK (urisrc); expose_output_pad (urisrc, output_pad); gst_object_unref (output_pad); } } else { /* only enable download buffering if the upstream duration is known */ if (urisrc->download) { GstQuery *query = gst_query_new_duration (GST_FORMAT_BYTES); if (gst_pad_query (srcpad, query)) { gint64 dur; gst_query_parse_duration (query, NULL, &dur); info->use_downloadbuffer = (dur != -1); } gst_query_unref (query); } info->use_queue2 = urisrc->use_buffering; if (urisrc->parse_streams) { /* GST_URI_SOURCE_BIN_LOCK (urisrc); */ setup_parsebin_for_slot (info, srcpad); /* GST_URI_SOURCE_BIN_UNLOCK (urisrc); */ } else { OutputSlotInfo *slot; GstPad *output_pad; GST_URI_SOURCE_BIN_LOCK (urisrc); slot = new_output_slot (info, srcpad); gst_pad_add_probe (srcpad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM, pre_queue_event_probe, urisrc, NULL); output_pad = gst_object_ref (slot->output_pad); GST_URI_SOURCE_BIN_UNLOCK (urisrc); expose_output_pad (urisrc, output_pad); gst_object_unref (output_pad); } } return; /* ERRORS */ no_demuxer: { /* error was posted */ return; } no_demuxer_sink: { GST_ELEMENT_ERROR (urisrc, CORE, NEGOTIATION, (NULL), ("Adaptive demuxer element has no 'sink' pad")); return; } could_not_link: { GST_URI_SOURCE_BIN_UNLOCK (urisrc); GST_ELEMENT_ERROR (urisrc, CORE, NEGOTIATION, (NULL), ("Can't link typefind to adaptive demuxer element")); return; } } /* signaled when we have a stream and we need to configure the download * buffering or regular buffering */ static void type_found (GstElement * typefind, guint probability, GstCaps * caps, ChildSrcPadInfo * info) { GstURISourceBin *urisrc = info->urisrc; GstPad *srcpad = gst_element_get_static_pad (typefind, "src"); GST_DEBUG_OBJECT (urisrc, "typefind found caps %" GST_PTR_FORMAT " on pad %" GST_PTR_FORMAT, caps, srcpad); handle_new_pad (info, srcpad, caps); gst_object_unref (GST_OBJECT (srcpad)); } /* setup typefind for any source. This will first plug a typefind element to the * source. After we find the type, we decide to whether to plug an adaptive * demuxer, or just link through queue2 (if needed) and expose the data */ static gboolean setup_typefind (ChildSrcPadInfo * info) { GstURISourceBin *urisrc = info->urisrc; GstPad *sinkpad; /* now create the typefind element */ info->typefind = gst_element_factory_make ("typefind", NULL); if (!info->typefind) goto no_typefind; /* Make sure the bin doesn't set the typefind running yet */ gst_element_set_locked_state (info->typefind, TRUE); gst_bin_add (GST_BIN_CAST (urisrc), info->typefind); sinkpad = gst_element_get_static_pad (info->typefind, "sink"); if (gst_pad_link (info->src_pad, sinkpad) != GST_PAD_LINK_OK) goto could_not_link; gst_object_unref (sinkpad); /* connect a signal to find out when the typefind element found * a type */ g_signal_connect (info->typefind, "have-type", G_CALLBACK (type_found), info); /* Now it can start */ gst_element_set_locked_state (info->typefind, FALSE); gst_element_sync_state_with_parent (info->typefind); return TRUE; /* ERRORS */ no_typefind: { post_missing_plugin_error (GST_ELEMENT_CAST (urisrc), "typefind"); GST_ELEMENT_ERROR (urisrc, CORE, MISSING_PLUGIN, (NULL), ("No typefind element, check your installation")); return FALSE; } could_not_link: { gst_object_unref (sinkpad); gst_element_set_locked_state (info->typefind, FALSE); GST_ELEMENT_ERROR (urisrc, CORE, NEGOTIATION, (NULL), ("Can't link source to typefind element")); return FALSE; } } /* CALL WITH URISOURCEBIN LOCK */ static void free_output_slot (OutputSlotInfo * slot, GstURISourceBin * urisrc) { GST_DEBUG_OBJECT (urisrc, "removing output slot %" GST_PTR_FORMAT " -> %" GST_PTR_FORMAT, slot->originating_pad, slot->output_pad); if (slot->queue) { if (slot->bitrate_changed_id > 0) g_signal_handler_disconnect (slot->queue, slot->bitrate_changed_id); slot->bitrate_changed_id = 0; gst_element_set_locked_state (slot->queue, TRUE); gst_element_set_state (slot->queue, GST_STATE_NULL); remove_buffering_msgs (urisrc, GST_OBJECT_CAST (slot->queue)); gst_bin_remove (GST_BIN_CAST (urisrc), slot->queue); } if (slot->queue_sinkpad) { if (slot->linked_info && slot->linked_info->multiqueue) gst_element_release_request_pad (slot->linked_info->multiqueue, slot->queue_sinkpad); gst_object_replace ((GstObject **) & slot->queue_sinkpad, NULL); } if (slot->demuxer_event_probe_id) gst_pad_remove_probe (slot->originating_pad, slot->demuxer_event_probe_id); gst_object_unref (slot->originating_pad); /* deactivate and remove the srcpad */ gst_pad_set_active (slot->output_pad, FALSE); gst_element_remove_pad (GST_ELEMENT_CAST (urisrc), slot->output_pad); g_free (slot); } static void call_free_output_slot (GstURISourceBin * urisrc, OutputSlotInfo * slot) { GST_LOG_OBJECT (urisrc, "free output slot in thread pool"); free_output_slot (slot, urisrc); } /* must be called with GST_URI_SOURCE_BIN_LOCK */ static void free_output_slot_async (GstURISourceBin * urisrc, OutputSlotInfo * slot) { GST_LOG_OBJECT (urisrc, "pushing output slot on thread pool to free"); slot->linked_info->outputs = g_list_remove (slot->linked_info->outputs, slot); gst_element_call_async (GST_ELEMENT_CAST (urisrc), (GstElementCallAsyncFunc) call_free_output_slot, slot, NULL); } /* remove source and all related elements */ static void remove_source (GstURISourceBin * urisrc) { if (urisrc->source) { GstElement *source = urisrc->source; GST_DEBUG_OBJECT (urisrc, "removing old src element"); gst_element_set_state (source, GST_STATE_NULL); if (urisrc->src_np_sig_id) { g_signal_handler_disconnect (source, urisrc->src_np_sig_id); urisrc->src_np_sig_id = 0; } gst_bin_remove (GST_BIN_CAST (urisrc), source); urisrc->source = NULL; } GST_URI_SOURCE_BIN_LOCK (urisrc); if (urisrc->src_infos) { g_list_foreach (urisrc->src_infos, (GFunc) free_child_src_pad_info, urisrc); g_list_free (urisrc->src_infos); urisrc->src_infos = NULL; } GST_URI_SOURCE_BIN_UNLOCK (urisrc); } /* is called when a dynamic source element created a new pad. */ static void source_new_pad (GstElement * element, GstPad * pad, GstURISourceBin * urisrc) { GstCaps *caps; ChildSrcPadInfo *info = new_child_src_pad_info (urisrc, pad); GST_DEBUG_OBJECT (urisrc, "Found new pad %s.%s in source element %s", GST_DEBUG_PAD_NAME (pad), GST_ELEMENT_NAME (element)); caps = gst_pad_get_current_caps (pad); GST_DEBUG_OBJECT (urisrc, "caps %" GST_PTR_FORMAT, caps); if (caps == NULL) setup_typefind (info); else { handle_new_pad (info, pad, caps); gst_caps_unref (caps); } } /* construct and run the source and demuxer elements until we found * all the streams or until a preroll queue has been filled. */ static gboolean setup_source (GstURISourceBin * urisrc) { gboolean have_out, is_dynamic; GST_DEBUG_OBJECT (urisrc, "setup source"); /* create and configure an element that can handle the uri */ if (!(urisrc->source = gen_source_element (urisrc))) 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 (urisrc), urisrc->source); /* notify of the new source used */ g_object_notify (G_OBJECT (urisrc), "source"); g_signal_emit (urisrc, gst_uri_source_bin_signals[SIGNAL_SOURCE_SETUP], 0, urisrc->source); /* 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_and_expose_raw_pads (urisrc, &have_out, &is_dynamic)) goto invalid_source; if (!is_dynamic) { if (!have_out) goto no_pads; } else { GST_DEBUG_OBJECT (urisrc, "Source has dynamic output pads"); /* connect a handler for the new-pad signal */ urisrc->src_np_sig_id = g_signal_connect (urisrc->source, "pad-added", G_CALLBACK (source_new_pad), urisrc); } return TRUE; /* ERRORS */ no_source: { /* error message was already posted */ return FALSE; } invalid_source: { GST_ELEMENT_ERROR (urisrc, CORE, FAILED, (_("Source element is invalid.")), (NULL)); return FALSE; } no_pads: { GST_ELEMENT_ERROR (urisrc, CORE, FAILED, (_("Source element has no pads.")), (NULL)); 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 (GstURISourceBin * urisrc, 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; const GstStructure *structure; GST_DEBUG_OBJECT (urisrc, "redirect message: %" GST_PTR_FORMAT, msg); GST_DEBUG_OBJECT (urisrc, "connection speed: %" G_GUINT64_FORMAT, urisrc->connection_speed); structure = gst_message_get_structure (msg); if (urisrc->connection_speed == 0 || structure == NULL) return msg; locations_list = gst_structure_get_value (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 (urisrc, "no bitrate: %" GST_PTR_FORMAT, s); l_neutral = g_list_append (l_neutral, (gpointer) s); } else if (bitrate > urisrc->connection_speed) { GST_DEBUG_OBJECT (urisrc, "bitrate too high: %" GST_PTR_FORMAT, s); l_bad = g_list_append (l_bad, (gpointer) s); } else if (bitrate <= urisrc->connection_speed) { GST_DEBUG_OBJECT (urisrc, "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_take_value (new_structure, "locations", &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 (urisrc, "new redirect message: %" GST_PTR_FORMAT, new_msg); return new_msg; } /* CALL WITH URISOURCEBIN LOCK */ static OutputSlotInfo * output_slot_for_buffering_element (GstURISourceBin * urisrc, GstElement * element) { GList *top, *iter; for (top = urisrc->src_infos; top; top = top->next) { ChildSrcPadInfo *info = top->data; for (iter = info->outputs; iter; iter = iter->next) { OutputSlotInfo *slot = iter->data; if (slot->queue == element) return slot; } } return NULL; } static void handle_buffering_message (GstURISourceBin * urisrc, GstMessage * msg) { gint perc, msg_perc; gint smaller_perc = 100; GstMessage *smaller = NULL; GList *found = NULL; GList *iter; OutputSlotInfo *slot; /* buffering messages must be aggregated as there might be multiple buffering * elements in the pipeline and their independent buffering messages will * confuse the application * * urisourcebin keeps a list of messages received from elements that are * buffering. * Rules are: * 0) Ignore buffering from elements that are draining (is_eos == TRUE) * 1) Always post the smaller buffering % * 2) If an element posts a 100% buffering message, remove it from the list * 3) When there are no more messages on the list, post 100% message * 4) When an element posts a new buffering message, update the one * on the list to this new value */ gst_message_parse_buffering (msg, &msg_perc); GST_LOG_OBJECT (urisrc, "Got buffering msg from %" GST_PTR_FORMAT " with %d%%", GST_MESSAGE_SRC (msg), msg_perc); BUFFERING_LOCK (urisrc); slot = output_slot_for_buffering_element (urisrc, (GstElement *) GST_MESSAGE_SRC (msg)); if (slot && slot->is_eos) { /* Ignore buffering messages from queues we marked as EOS, * we already removed those from the list of buffering * objects */ BUFFERING_UNLOCK (urisrc); gst_message_replace (&msg, NULL); return; } g_mutex_lock (&urisrc->buffering_post_lock); /* * Single loop for 2 things: * 1) Look for a message with the same source * 1.1) If the received message is 100%, remove it from the list * 2) Find the minimum buffering from the list from elements that aren't EOS */ for (iter = urisrc->buffering_status; iter;) { GstMessage *bufstats = iter->data; gboolean is_eos = FALSE; slot = output_slot_for_buffering_element (urisrc, (GstElement *) GST_MESSAGE_SRC (msg)); if (slot) is_eos = slot->is_eos; if (GST_MESSAGE_SRC (bufstats) == GST_MESSAGE_SRC (msg)) { found = iter; if (msg_perc < 100) { gst_message_unref (iter->data); bufstats = iter->data = gst_message_ref (msg); } else { GList *current = iter; /* remove the element here and avoid confusing the loop */ iter = g_list_next (iter); gst_message_unref (current->data); urisrc->buffering_status = g_list_delete_link (urisrc->buffering_status, current); continue; } } /* only update minimum stat for non-EOS slots */ if (!is_eos) { gst_message_parse_buffering (bufstats, &perc); if (perc < smaller_perc) { smaller_perc = perc; smaller = bufstats; } } else { GST_LOG_OBJECT (urisrc, "Ignoring buffering from EOS element"); } iter = g_list_next (iter); } if (found == NULL && msg_perc < 100) { if (msg_perc < smaller_perc) { smaller_perc = msg_perc; smaller = msg; } urisrc->buffering_status = g_list_prepend (urisrc->buffering_status, gst_message_ref (msg)); } if (smaller_perc == urisrc->last_buffering_pct) { /* Don't repeat our last buffering status */ gst_message_replace (&msg, NULL); } else { urisrc->last_buffering_pct = smaller_perc; /* now compute the buffering message that should be posted */ if (smaller_perc == 100) { g_assert (urisrc->buffering_status == NULL); /* we are posting the original received msg */ } else { gst_message_replace (&msg, smaller); } } BUFFERING_UNLOCK (urisrc); if (msg) { GST_LOG_OBJECT (urisrc, "Sending buffering msg from %" GST_PTR_FORMAT " with %d%%", GST_MESSAGE_SRC (msg), smaller_perc); GST_BIN_CLASS (parent_class)->handle_message (GST_BIN (urisrc), msg); } else { GST_LOG_OBJECT (urisrc, "Dropped buffering msg as a repeat of %d%%", smaller_perc); } g_mutex_unlock (&urisrc->buffering_post_lock); } /* Remove any buffering message from the given source */ static void remove_buffering_msgs (GstURISourceBin * urisrc, GstObject * src) { GList *iter; gboolean removed = FALSE, post; BUFFERING_LOCK (urisrc); g_mutex_lock (&urisrc->buffering_post_lock); GST_DEBUG_OBJECT (urisrc, "Removing %" GST_PTR_FORMAT " buffering messages", src); for (iter = urisrc->buffering_status; iter;) { GstMessage *bufstats = iter->data; if (GST_MESSAGE_SRC (bufstats) == src) { gst_message_unref (bufstats); urisrc->buffering_status = g_list_delete_link (urisrc->buffering_status, iter); removed = TRUE; break; } iter = g_list_next (iter); } post = (removed && urisrc->buffering_status == NULL); BUFFERING_UNLOCK (urisrc); if (post) { GST_DEBUG_OBJECT (urisrc, "Last buffering element done - posting 100%%"); /* removed the last buffering element, post 100% */ gst_element_post_message (GST_ELEMENT_CAST (urisrc), gst_message_new_buffering (GST_OBJECT_CAST (urisrc), 100)); } g_mutex_unlock (&urisrc->buffering_post_lock); } static ChildSrcPadInfo * find_adaptive_demuxer_cspi_for_msg (GstURISourceBin * urisrc, GstElement * child) { ChildSrcPadInfo *res = NULL; GList *tmp; GstElement *parent = gst_object_ref (child); do { GstElement *next_parent; for (tmp = urisrc->src_infos; tmp; tmp = tmp->next) { ChildSrcPadInfo *info = tmp->data; if (parent == info->demuxer) { res = info; break; } } next_parent = (GstElement *) gst_element_get_parent (parent); gst_object_unref (parent); parent = next_parent; } while (parent && parent != (GstElement *) urisrc); if (parent) gst_object_unref (parent); return res; } static void handle_message (GstBin * bin, GstMessage * msg) { GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (bin); switch (GST_MESSAGE_TYPE (msg)) { case GST_MESSAGE_ELEMENT:{ if (gst_message_has_name (msg, "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 (urisrc, msg); } break; } case GST_MESSAGE_STREAM_COLLECTION: { ChildSrcPadInfo *info; /* We only want to forward stream collection from the source element *OR* * from adaptive demuxers. We do not want to forward them from the * potential parsebins since there might be many and require aggregation * to be useful/coherent. */ GST_URI_SOURCE_BIN_LOCK (urisrc); info = find_adaptive_demuxer_cspi_for_msg (urisrc, (GstElement *) GST_MESSAGE_SRC (msg)); if (info) { info->demuxer_streams_aware = TRUE; if (info->demuxer_is_parsebin) { GST_DEBUG_OBJECT (bin, "Dropping stream-collection from parsebin"); gst_message_unref (msg); msg = NULL; } } else if (GST_MESSAGE_SRC (msg) != (GstObject *) urisrc->source) { GST_LOG_OBJECT (bin, "Collection %" GST_PTR_FORMAT, msg); GST_DEBUG_OBJECT (bin, "Dropping stream-collection from %" GST_PTR_FORMAT, GST_MESSAGE_SRC (msg)); gst_message_unref (msg); msg = NULL; } GST_URI_SOURCE_BIN_UNLOCK (urisrc); } break; case GST_MESSAGE_BUFFERING: handle_buffering_message (urisrc, msg); msg = NULL; break; default: break; } if (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) (GstURISourceBin * urisrc, QueryFold * fold); typedef void (*QueryDoneFunction) (GstURISourceBin * urisrc, QueryFold * fold); /* for duration/position we collect all durations/positions and take * the MAX of all valid results */ static void uri_source_query_init (GstURISourceBin * urisrc, QueryFold * fold) { fold->min = 0; fold->max = -1; fold->seekable = TRUE; fold->live = 0; } static gboolean uri_source_query_duration_fold (const GValue * item, GValue * ret, QueryFold * fold) { GstPad *pad = g_value_get_object (item); if (gst_pad_query (pad, 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; } return TRUE; } static void uri_source_query_duration_done (GstURISourceBin * urisrc, 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 uri_source_query_position_fold (const GValue * item, GValue * ret, QueryFold * fold) { GstPad *pad = g_value_get_object (item); if (gst_pad_query (pad, 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; } return TRUE; } static void uri_source_query_position_done (GstURISourceBin * urisrc, 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 (urisrc, "max position %" G_GINT64_FORMAT, fold->max); } static gboolean uri_source_query_latency_fold (const GValue * item, GValue * ret, QueryFold * fold) { GstPad *pad = g_value_get_object (item); if (gst_pad_query (pad, fold->query)) { GstClockTime min, max; gboolean live; gst_query_parse_latency (fold->query, &live, &min, &max); GST_DEBUG_OBJECT (pad, "got latency min %" GST_TIME_FORMAT ", max %" GST_TIME_FORMAT ", live %d", GST_TIME_ARGS (min), GST_TIME_ARGS (max), live); if (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; fold->live = TRUE; } } else { GST_LOG_OBJECT (pad, "latency query failed"); g_value_set_boolean (ret, FALSE); } return TRUE; } static void uri_source_query_latency_done (GstURISourceBin * urisrc, QueryFold * fold) { /* store max in query result */ gst_query_set_latency (fold->query, fold->live, fold->min, fold->max); GST_DEBUG_OBJECT (urisrc, "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 uri_source_query_seeking_fold (const GValue * item, GValue * ret, QueryFold * fold) { GstPad *pad = g_value_get_object (item); if (gst_pad_query (pad, 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) fold->seekable = seekable; } return TRUE; } static void uri_source_query_seeking_done (GstURISourceBin * urisrc, 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 (urisrc, "seekable %d", fold->seekable); } /* generic fold, return first valid result */ static gboolean uri_source_query_generic_fold (const GValue * item, GValue * ret, QueryFold * fold) { GstPad *pad = g_value_get_object (item); gboolean res; if ((res = gst_pad_query (pad, fold->query))) { g_value_set_boolean (ret, TRUE); GST_DEBUG_OBJECT (item, "answered query %p", fold->query); } /* 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_source_bin_query (GstElement * element, GstQuery * query) { GstURISourceBin *urisrc; gboolean res = FALSE; GstIterator *iter; GstIteratorFoldFunction fold_func; QueryInitFunction fold_init = NULL; QueryDoneFunction fold_done = NULL; QueryFold fold_data; GValue ret = { 0 }; gboolean default_ret = FALSE; urisrc = GST_URI_SOURCE_BIN (element); switch (GST_QUERY_TYPE (query)) { case GST_QUERY_DURATION: /* iterate and collect durations */ fold_func = (GstIteratorFoldFunction) uri_source_query_duration_fold; fold_init = uri_source_query_init; fold_done = uri_source_query_duration_done; break; case GST_QUERY_POSITION: /* iterate and collect durations */ fold_func = (GstIteratorFoldFunction) uri_source_query_position_fold; fold_init = uri_source_query_init; fold_done = uri_source_query_position_done; break; case GST_QUERY_LATENCY: /* iterate and collect durations */ fold_func = (GstIteratorFoldFunction) uri_source_query_latency_fold; fold_init = uri_source_query_init; fold_done = uri_source_query_latency_done; default_ret = TRUE; break; case GST_QUERY_SEEKING: /* iterate and collect durations */ fold_func = (GstIteratorFoldFunction) uri_source_query_seeking_fold; fold_init = uri_source_query_init; fold_done = uri_source_query_seeking_done; break; default: fold_func = (GstIteratorFoldFunction) uri_source_query_generic_fold; break; } fold_data.query = query; g_value_init (&ret, G_TYPE_BOOLEAN); g_value_set_boolean (&ret, default_ret); 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 (urisrc, &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 (urisrc, &fold_data); g_value_set_boolean (&ret, default_ret); break; case GST_ITERATOR_OK: case GST_ITERATOR_DONE: res = g_value_get_boolean (&ret); if (fold_done != NULL && res) fold_done (urisrc, &fold_data); goto done; default: res = FALSE; goto done; } } done: gst_iterator_free (iter); return res; } static GstStateChangeReturn gst_uri_source_bin_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret; GstURISourceBin *urisrc = GST_URI_SOURCE_BIN (element); switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: GST_URI_SOURCE_BIN_LOCK (element); urisrc->flushing = FALSE; urisrc->activated = FALSE; GST_URI_SOURCE_BIN_UNLOCK (element); GST_DEBUG ("ready to paused"); if (!setup_source (urisrc)) goto source_failed; break; case GST_STATE_CHANGE_PAUSED_TO_READY: GST_URI_SOURCE_BIN_LOCK (element); urisrc->flushing = TRUE; g_cond_broadcast (&urisrc->activation_cond); GST_URI_SOURCE_BIN_UNLOCK (element); default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); if (ret == GST_STATE_CHANGE_FAILURE) goto setup_failed; switch (transition) { case GST_STATE_CHANGE_READY_TO_PAUSED: { GST_URI_SOURCE_BIN_LOCK (element); GST_DEBUG_OBJECT (urisrc, "Potentially exposing pads"); urisrc->activated = TRUE; g_cond_broadcast (&urisrc->activation_cond); GST_URI_SOURCE_BIN_UNLOCK (element); } break; case GST_STATE_CHANGE_PAUSED_TO_READY: GST_DEBUG ("paused to ready"); remove_source (urisrc); g_list_free_full (urisrc->buffering_status, (GDestroyNotify) gst_message_unref); urisrc->buffering_status = NULL; urisrc->last_buffering_pct = -1; break; default: break; } return ret; /* ERRORS */ source_failed: { remove_source (urisrc); return GST_STATE_CHANGE_FAILURE; } setup_failed: { if (transition == GST_STATE_CHANGE_READY_TO_PAUSED) remove_source (urisrc); return GST_STATE_CHANGE_FAILURE; } }