/* 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., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /** * SECTION:element-uridecodebin3 * @title: uridecodebin3 * * Decodes data from a URI into raw media. It selects a source element that can * handle the given #GstURIDecodeBin3:uri scheme and connects it to a decodebin3. */ #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_DECODE_BIN3 \ (gst_uri_decode_bin3_get_type()) #define GST_URI_DECODE_BIN3(obj) \ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_URI_DECODE_BIN3,GstURIDecodeBin3)) #define GST_URI_DECODE_BIN3_CLASS(klass) \ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_URI_DECODE_BIN3,GstURIDecodeBin3Class)) #define GST_IS_URI_DECODE_BIN3(obj) \ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_URI_DECODE_BIN3)) #define GST_IS_URI_DECODE_BIN3_CLASS(klass) \ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_URI_DECODE_BIN3)) #define GST_URI_DECODE_BIN3_CAST(obj) ((GstURIDecodeBin3 *) (obj)) typedef struct _GstSourceGroup GstSourceGroup; typedef struct _GstURIDecodeBin3 GstURIDecodeBin3; typedef struct _GstURIDecodeBin3Class GstURIDecodeBin3Class; typedef struct _GstPlayItem GstPlayItem; typedef struct _GstSourceItem GstSourceItem; typedef struct _GstSourceHandler GstSourceHandler; typedef struct _GstSourcePad GstSourcePad; typedef struct _OutputPad OutputPad; /* A structure describing a play item, which travels through the elements * over time. * * All source items in this play item will be played together. Corresponds to an * end-user "play item" (ex: one item from a playlist, even though it might be * using a main content and subtitle content). */ struct _GstPlayItem { GstURIDecodeBin3 *uridecodebin; /* Main URI */ GstSourceItem *main_item; /* Auxiliary URI */ /* FIXME : Replace by a list later */ GstSourceItem *sub_item; /* The group_id used to identify this play item via STREAM_START events * This is the group_id which will be used externally (i.e. rewritten * to outgoing STREAM_START events and in emitted signals). * The urisourcebin-specific group_id is located in GstSourceItem */ guint group_id; /* The two following variables are required for gapless, since there could be * a play item which is started which is different from the one currently * being outputted */ /* active: TRUE if the backing urisourcebin were created */ gboolean active; /* Whether about-to-finish was already posted for this play item */ gboolean posted_about_to_finish; /* Whether about-to-finish should be posted once this play item becomes the * current input item */ gboolean pending_about_to_finish; }; /* The actual "source" component of a "play item" * * This is defined by having a URI, is backed by a `GstSourceHandler`. */ struct _GstSourceItem { /* The GstPlayItem to which this GstSourceItem belongs to */ GstPlayItem *play_item; gchar *uri; /* The urisourcebin controlling this uri * Can be NULL */ GstSourceHandler *handler; }; /* Structure wrapping everything related to a urisourcebin */ struct _GstSourceHandler { GstURIDecodeBin3 *uridecodebin; GstPlayItem *play_item; GstElement *urisourcebin; /* Signal handlers */ gulong pad_added_id; gulong pad_removed_id; gulong source_setup_id; gulong about_to_finish_id; /* TRUE if the controlled urisourcebin was added to uridecodebin */ gboolean active; /* TRUE if the urisourcebin handles main item */ gboolean is_main_source; /* buffering message stored for after switching */ GstMessage *pending_buffering_msg; /* TRUE if urisourcebin handles stream-selection */ gboolean upstream_selected; /* Number of expected sourcepads. Default 1, else it's the number of streams * specified by GST_MESSAGE_SELECTED_STREAMS from the source */ guint expected_pads; /* List of GstSourcePad */ GList *sourcepads; /* If we saw a redirection message from this source. */ gboolean saw_redirection; }; /* Structure wrapping everything related to a urisourcebin pad */ struct _GstSourcePad { GstSourceHandler *handler; GstPad *src_pad; /* GstStream (if present) */ GstStream *stream; /* Decodebin3 pad to which src_pad is linked to */ GstPad *db3_sink_pad; /* TRUE if db3_sink_pad is a request pad */ gboolean db3_pad_is_request; /* TRUE if EOS went through the source pad. Marked as TRUE if decodebin3 * notified `about-to-finish` for pull mode */ gboolean saw_eos; /* Downstream blocking probe id. Only set/valid if we need to block this * pad */ gulong block_probe_id; /* Downstream event probe id */ gulong event_probe_id; }; /* Controls an output source pad */ struct _OutputPad { GstURIDecodeBin3 *uridecodebin; GstPad *target_pad; GstPad *ghost_pad; /* Downstream event probe id */ gulong probe_id; /* The last seen (i.e. current) group_id * Can be (guint)-1 if no group_id was seen yet */ guint current_group_id; }; #define PLAY_ITEMS_GET_LOCK(d) (&(GST_URI_DECODE_BIN3_CAST(d)->play_items_lock)) #define PLAY_ITEMS_LOCK(d) G_STMT_START { \ GST_TRACE("Locking play_items from thread %p", g_thread_self()); \ g_mutex_lock (PLAY_ITEMS_GET_LOCK (d)); \ GST_TRACE("Locked play_items from thread %p", g_thread_self()); \ } G_STMT_END #define PLAY_ITEMS_UNLOCK(d) G_STMT_START { \ GST_TRACE("Unlocking play_items from thread %p", g_thread_self()); \ g_mutex_unlock (PLAY_ITEMS_GET_LOCK (d)); \ } G_STMT_END /** * GstURIDecodeBin3 * * uridecodebin3 element struct */ struct _GstURIDecodeBin3 { GstBin parent_instance; /* Properties */ GstElement *source; guint64 connection_speed; /* In bits/sec (0 = unknown) */ GstCaps *caps; guint64 buffer_duration; /* When buffering, buffer duration (ns) */ guint buffer_size; /* When buffering, buffer size (bytes) */ gboolean download; gchar *download_dir; gboolean use_buffering; guint64 ring_buffer_max_size; gboolean instant_uri; /* Whether URI changes should be applied immediately or not */ /* Mutex to protect play_items/input_item/output_item */ GMutex play_items_lock; /* Notify that the input_item sources have all drained */ GCond input_source_drained; /* List of GstPlayItem ordered by time of creation (first is oldest, new ones * are appended) */ GList *play_items; /* Play item currently feeding decodebin3. */ GstPlayItem *input_item; /* Play item currently outputted by decodebin3 */ GstPlayItem *output_item; /* A global decodebin3 that's used to actually do decoding */ GstElement *decodebin; /* db3 signals */ gulong db_pad_added_id; gulong db_pad_removed_id; gulong db_select_stream_id; gulong db_about_to_finish_id; /* 1 if shutting down */ gint shutdown; GList *output_pads; /* List of OutputPad */ }; static GstStateChangeReturn activate_play_item (GstPlayItem * item); static gint gst_uridecodebin3_select_stream (GstURIDecodeBin3 * dbin, GstStreamCollection * collection, GstStream * stream) { GST_LOG_OBJECT (dbin, "default select-stream, returning -1"); return -1; } struct _GstURIDecodeBin3Class { GstBinClass parent_class; gint (*select_stream) (GstURIDecodeBin3 * dbin, GstStreamCollection * collection, GstStream * stream); }; GST_DEBUG_CATEGORY_STATIC (gst_uri_decode_bin3_debug); #define GST_CAT_DEFAULT gst_uri_decode_bin3_debug /* signals */ enum { SIGNAL_SELECT_STREAM, SIGNAL_SOURCE_SETUP, SIGNAL_ABOUT_TO_FINISH, LAST_SIGNAL }; /* properties */ #define DEFAULT_PROP_URI NULL #define DEFAULT_PROP_SUBURI NULL #define DEFAULT_CONNECTION_SPEED 0 #define DEFAULT_CAPS (gst_static_caps_get (&default_raw_caps)) #define DEFAULT_BUFFER_DURATION -1 #define DEFAULT_BUFFER_SIZE -1 #define DEFAULT_DOWNLOAD FALSE #define DEFAULT_USE_BUFFERING FALSE #define DEFAULT_RING_BUFFER_MAX_SIZE 0 #define DEFAULT_INSTANT_URI FALSE enum { PROP_0, PROP_URI, PROP_CURRENT_URI, PROP_SUBURI, PROP_CURRENT_SUBURI, PROP_SOURCE, PROP_CONNECTION_SPEED, PROP_BUFFER_SIZE, PROP_BUFFER_DURATION, PROP_DOWNLOAD, PROP_DOWNLOAD_DIR, PROP_USE_BUFFERING, PROP_RING_BUFFER_MAX_SIZE, PROP_CAPS, PROP_INSTANT_URI }; static guint gst_uri_decode_bin3_signals[LAST_SIGNAL] = { 0 }; static GstStaticCaps default_raw_caps = GST_STATIC_CAPS (DEFAULT_RAW_CAPS); static GstStaticPadTemplate video_src_template = GST_STATIC_PAD_TEMPLATE ("video_%u", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS_ANY); static GstStaticPadTemplate audio_src_template = GST_STATIC_PAD_TEMPLATE ("audio_%u", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS_ANY); static GstStaticPadTemplate text_src_template = GST_STATIC_PAD_TEMPLATE ("text_%u", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS_ANY); static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src_%u", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS_ANY); GType gst_uri_decode_bin3_get_type (void); #define gst_uri_decode_bin3_parent_class parent_class G_DEFINE_TYPE (GstURIDecodeBin3, gst_uri_decode_bin3, GST_TYPE_BIN); #define _do_init \ GST_DEBUG_CATEGORY_INIT (gst_uri_decode_bin3_debug, "uridecodebin3", 0, "URI decoder element 3"); \ playback_element_init (plugin); GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (uridecodebin3, "uridecodebin3", GST_RANK_NONE, GST_TYPE_URI_DECODE_BIN3, _do_init); #define REMOVE_SIGNAL(obj,id) \ if (id) { \ g_signal_handler_disconnect (obj, id); \ id = 0; \ } static void gst_uri_decode_bin3_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_uri_decode_bin3_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_uri_decode_bin3_dispose (GObject * obj); static GstSourceHandler *new_source_handler (GstURIDecodeBin3 * uridecodebin, GstPlayItem * item, gboolean is_main); static void free_source_handler (GstURIDecodeBin3 * uridecodebin, GstSourceHandler * item, gboolean lock_state); static void free_source_item (GstURIDecodeBin3 * uridecodebin, GstSourceItem * item); static GstPlayItem *new_play_item (GstURIDecodeBin3 * dec); static void free_play_item (GstURIDecodeBin3 * dec, GstPlayItem * item); static gboolean play_item_is_eos (GstPlayItem * item); static void play_item_set_eos (GstPlayItem * item); static gboolean play_item_has_all_pads (GstPlayItem * item); static void gst_uri_decode_bin3_set_uri (GstURIDecodeBin3 * dec, const gchar * uri); static void gst_uri_decode_bin3_set_suburi (GstURIDecodeBin3 * dec, const gchar * uri); static GstStateChangeReturn gst_uri_decode_bin3_change_state (GstElement * element, GstStateChange transition); static gboolean gst_uri_decodebin3_send_event (GstElement * element, GstEvent * event); static void gst_uri_decode_bin3_handle_message (GstBin * bin, GstMessage * msg); static gboolean _gst_int_accumulator (GSignalInvocationHint * ihint, GValue * return_accu, const GValue * handler_return, gpointer dummy) { gint res = g_value_get_int (handler_return); g_value_set_int (return_accu, res); if (res == -1) return TRUE; return FALSE; } static void gst_uri_decode_bin3_class_init (GstURIDecodeBin3Class * 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_bin3_set_property; gobject_class->get_property = gst_uri_decode_bin3_get_property; gobject_class->dispose = gst_uri_decode_bin3_dispose; 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_CURRENT_URI, g_param_spec_string ("current-uri", "Current URI", "The currently playing URI", NULL, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_SUBURI, g_param_spec_string ("suburi", ".sub-URI", "Optional URI of a subtitle", NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_CURRENT_SUBURI, g_param_spec_string ("current-suburi", "Current .sub-URI", "The currently playing URI of a subtitle", NULL, G_PARAM_READABLE | 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)); /** * GstURIDecodeBin3::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)); /** * GstURIDecodeBin3:download-dir: * * The directory where buffers are downloaded to, if 'download' is enabled. * If not set (default), the XDG cache directory is used. * Will be applied to the next 'uri' played or until the element go back to * the PAUSED state. * * Since: 1.24 */ g_object_class_install_property (gobject_class, PROP_DOWNLOAD_DIR, g_param_spec_string ("download-dir", "Download Directory", "The directory where buffers are downloaded to, if 'download' is enabled. " "If not set (default), the XDG cache directory is used.", NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstURIDecodeBin3::use-buffering: * * Emit BUFFERING messages based on low-/high-percent thresholds of the * demuxed or parsed data. * When download buffering is activated and used for the current media * type, this property does nothing. Otherwise perform buffering on the * demuxed or parsed media. */ 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)); /** * GstURIDecodeBin3::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)); 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_PARAM_STATIC_STRINGS)); /** * GstURIDecodeBin3:instant-uri: * * Changes to uri are applied immediately (instead of on EOS or when the * element is set back to PLAYING). * * Since: 1.22 */ g_object_class_install_property (gobject_class, PROP_INSTANT_URI, g_param_spec_boolean ("instant-uri", "Instantaneous URI change", "When enabled, URI changes are applied immediately", DEFAULT_INSTANT_URI, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); /** * GstURIDecodebin3::select-stream * @decodebin: a #GstURIDecodebin3 * @collection: a #GstStreamCollection * @stream: a #GstStream * * This signal is emitted whenever @decodebin needs to decide whether * to expose a @stream of a given @collection. * * Note that the prefered way to select streams is to listen to * GST_MESSAGE_STREAM_COLLECTION on the bus and send a * GST_EVENT_SELECT_STREAMS with the streams the user wants. * * Returns: 1 if the stream should be selected, 0 if it shouldn't be selected. * A value of -1 (default) lets @decodebin decide what to do with the stream. * */ gst_uri_decode_bin3_signals[SIGNAL_SELECT_STREAM] = g_signal_new ("select-stream", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstURIDecodeBin3Class, select_stream), _gst_int_accumulator, NULL, NULL, G_TYPE_INT, 2, GST_TYPE_STREAM_COLLECTION, GST_TYPE_STREAM); /** * GstURIDecodeBin3::source-setup: * @bin: the uridecodebin. * @source: source element * * This signal is emitted after a 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). */ gst_uri_decode_bin3_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); /** * GstURIDecodeBin3::about-to-finish: * * This signal is emitted when the data for the selected URI is * entirely buffered and it is safe to specify another URI. */ gst_uri_decode_bin3_signals[SIGNAL_ABOUT_TO_FINISH] = g_signal_new ("about-to-finish", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 0, G_TYPE_NONE); gst_element_class_add_static_pad_template (gstelement_class, &video_src_template); gst_element_class_add_static_pad_template (gstelement_class, &audio_src_template); gst_element_class_add_static_pad_template (gstelement_class, &text_src_template); gst_element_class_add_static_pad_template (gstelement_class, &src_template); gst_element_class_set_static_metadata (gstelement_class, "URI Decoder", "Generic/Bin/Decoder", "Autoplug and decode an URI to raw media", "Edward Hervey , Jan Schmidt "); gstelement_class->change_state = gst_uri_decode_bin3_change_state; gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_uri_decodebin3_send_event); gstbin_class->handle_message = gst_uri_decode_bin3_handle_message; klass->select_stream = gst_uridecodebin3_select_stream; } static void current_updated (GstURIDecodeBin3 * dec) { GObject *object = G_OBJECT (dec); g_object_notify (object, "current-uri"); g_object_notify (object, "current-suburi"); } static void check_output_group_id (GstURIDecodeBin3 * dec) { GList *iter; guint common_group_id = GST_GROUP_ID_INVALID; gboolean notify_current = FALSE; PLAY_ITEMS_LOCK (dec); for (iter = dec->output_pads; iter; iter = iter->next) { OutputPad *pad = iter->data; if (common_group_id == GST_GROUP_ID_INVALID) common_group_id = pad->current_group_id; else if (common_group_id != pad->current_group_id) { GST_DEBUG_OBJECT (dec, "transitioning output play item"); PLAY_ITEMS_UNLOCK (dec); return; } } if (dec->output_item->group_id == common_group_id) { GST_DEBUG_OBJECT (dec, "Output play item %d fully active", common_group_id); } else if (dec->output_item->group_id == GST_GROUP_ID_INVALID) { /* This can happen for pull-based situations */ GST_DEBUG_OBJECT (dec, "Assigning group id %u to current output play item", common_group_id); dec->output_item->group_id = common_group_id; } else if (common_group_id != GST_GROUP_ID_INVALID && dec->output_item->group_id != common_group_id) { GstPlayItem *previous_item = dec->output_item; GST_DEBUG_OBJECT (dec, "Output play item %d fully active", common_group_id); if (g_list_length (dec->play_items) > 1) { dec->play_items = g_list_remove (dec->play_items, previous_item); dec->output_item = dec->play_items->data; dec->output_item->group_id = common_group_id; free_play_item (dec, previous_item); } notify_current = TRUE; } PLAY_ITEMS_UNLOCK (dec); if (notify_current) { /* don't hold the object lock as application could fetch some properties whose getters require this lock as well */ current_updated (dec); } } static GstPadProbeReturn db_src_probe (GstPad * pad, GstPadProbeInfo * info, OutputPad * output) { GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info); GstURIDecodeBin3 *uridecodebin = output->uridecodebin; GST_DEBUG_OBJECT (pad, "event %" GST_PTR_FORMAT, event); /* EOS : Mark pad as EOS */ switch (GST_EVENT_TYPE (event)) { case GST_EVENT_EOS: { /* If there is a next input, drop the EOS event */ if (uridecodebin->input_item != uridecodebin->output_item || uridecodebin->input_item != g_list_last (uridecodebin->play_items)->data) { GST_DEBUG_OBJECT (uridecodebin, "Dropping EOS event because in gapless mode"); return GST_PAD_PROBE_DROP; } break; } case GST_EVENT_STREAM_START: { /* STREAM_START : Store group_id and check if currently active * PlayEntry changed */ if (gst_event_parse_group_id (event, &output->current_group_id)) { GST_DEBUG_OBJECT (pad, "current group id %" G_GUINT32_FORMAT, output->current_group_id); /* Check if we switched over to a new output */ check_output_group_id (uridecodebin); } break; } default: break; } return GST_PAD_PROBE_OK; } static OutputPad * add_output_pad (GstURIDecodeBin3 * dec, GstPad * target_pad) { OutputPad *output; gchar *pad_name; GstEvent *stream_start; output = g_new0 (OutputPad, 1); GST_LOG_OBJECT (dec, "Created output %p", output); output->uridecodebin = dec; output->target_pad = target_pad; output->current_group_id = GST_GROUP_ID_INVALID; pad_name = gst_pad_get_name (target_pad); output->ghost_pad = gst_ghost_pad_new (pad_name, target_pad); g_free (pad_name); gst_pad_set_active (output->ghost_pad, TRUE); stream_start = gst_pad_get_sticky_event (target_pad, GST_EVENT_STREAM_START, 0); if (stream_start) { gst_pad_store_sticky_event (output->ghost_pad, stream_start); gst_event_unref (stream_start); } else { GST_WARNING_OBJECT (target_pad, "Exposing pad without stored stream-start event"); } gst_element_add_pad (GST_ELEMENT (dec), output->ghost_pad); output->probe_id = gst_pad_add_probe (output->target_pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM, (GstPadProbeCallback) db_src_probe, output, NULL); /* FIXME: LOCK TO PROTECT PAD LIST */ dec->output_pads = g_list_append (dec->output_pads, output); return output; } static void db_pad_added_cb (GstElement * element, GstPad * pad, GstURIDecodeBin3 * dec) { GST_DEBUG_OBJECT (dec, "Wrapping new pad %s:%s", GST_DEBUG_PAD_NAME (pad)); if (GST_PAD_IS_SRC (pad)) add_output_pad (dec, pad); } static void db_pad_removed_cb (GstElement * element, GstPad * pad, GstURIDecodeBin3 * dec) { GList *tmp; OutputPad *output = NULL; if (!GST_PAD_IS_SRC (pad)) return; GST_DEBUG_OBJECT (dec, "pad %s:%s", GST_DEBUG_PAD_NAME (pad)); /* FIXME: LOCK for list access */ for (tmp = dec->output_pads; tmp; tmp = tmp->next) { OutputPad *cand = (OutputPad *) tmp->data; if (cand->target_pad == pad) { output = cand; dec->output_pads = g_list_delete_link (dec->output_pads, tmp); break; } } if (output) { GST_LOG_OBJECT (element, "Removing output %p", output); /* Remove source ghost pad */ gst_ghost_pad_set_target ((GstGhostPad *) output->ghost_pad, NULL); gst_element_remove_pad ((GstElement *) dec, output->ghost_pad); /* Remove event probe */ gst_pad_remove_probe (output->target_pad, output->probe_id); g_free (output); check_output_group_id (dec); } } static gint db_select_stream_cb (GstElement * decodebin, GstStreamCollection * collection, GstStream * stream, GstURIDecodeBin3 * uridecodebin) { gint response = -1; g_signal_emit (uridecodebin, gst_uri_decode_bin3_signals[SIGNAL_SELECT_STREAM], 0, collection, stream, &response); return response; } static gboolean check_pad_mode (GstElement * src, GstPad * pad, gpointer udata) { GstPadMode curmode = GST_PAD_MODE (pad); GstPadMode *retmode = (GstPadMode *) udata; /* We don't care if pads aren't activated */ if (curmode == GST_PAD_MODE_NONE) return TRUE; if (*retmode == GST_PAD_MODE_NONE) { *retmode = curmode; } else if (*retmode != curmode) { GST_ERROR_OBJECT (src, "source has different scheduling mode ?"); } return TRUE; } static gboolean play_item_is_pull_based (GstPlayItem * item) { GstElement *src; GstPadMode mode = GST_PAD_MODE_NONE; g_assert (item->main_item && item->main_item->handler && item->main_item->handler->urisourcebin); src = item->main_item->handler->urisourcebin; gst_element_foreach_src_pad (src, check_pad_mode, &mode); return (mode == GST_PAD_MODE_PULL); } static void emit_and_handle_about_to_finish (GstURIDecodeBin3 * uridecodebin, GstPlayItem * item) { GST_DEBUG_OBJECT (uridecodebin, "output %d , posted_about_to_finish:%d", item->group_id, item->posted_about_to_finish); if (item->posted_about_to_finish) { GST_DEBUG_OBJECT (uridecodebin, "already handling about-to-finish for this play item"); return; } if (item != uridecodebin->input_item) { GST_DEBUG_OBJECT (uridecodebin, "Postponing about-to-finish propagation"); item->pending_about_to_finish = TRUE; return; } /* If the input entry is pull-based, mark all the source pads as EOS */ if (play_item_is_pull_based (item)) { GST_DEBUG_OBJECT (uridecodebin, "Marking play item as EOS"); play_item_set_eos (item); } item->posted_about_to_finish = TRUE; GST_DEBUG_OBJECT (uridecodebin, "Posting about-to-finish"); g_signal_emit (uridecodebin, gst_uri_decode_bin3_signals[SIGNAL_ABOUT_TO_FINISH], 0, NULL); /* Note : Activation of the (potential) next entry is handled in * gst_uri_decode_bin3_set_uri */ } static void db_about_to_finish_cb (GstElement * decodebin, GstURIDecodeBin3 * uridecodebin) { GST_LOG_OBJECT (uridecodebin, "about to finish from %s", GST_OBJECT_NAME (decodebin)); emit_and_handle_about_to_finish (uridecodebin, uridecodebin->output_item); } static void gst_uri_decode_bin3_init (GstURIDecodeBin3 * dec) { GstPlayItem *item; dec->connection_speed = DEFAULT_CONNECTION_SPEED; dec->caps = DEFAULT_CAPS; dec->buffer_duration = DEFAULT_BUFFER_DURATION; dec->buffer_size = DEFAULT_BUFFER_SIZE; dec->download = DEFAULT_DOWNLOAD; dec->use_buffering = DEFAULT_USE_BUFFERING; dec->ring_buffer_max_size = DEFAULT_RING_BUFFER_MAX_SIZE; g_mutex_init (&dec->play_items_lock); g_cond_init (&dec->input_source_drained); dec->decodebin = gst_element_factory_make ("decodebin3", NULL); gst_bin_add (GST_BIN_CAST (dec), dec->decodebin); dec->db_pad_added_id = g_signal_connect (dec->decodebin, "pad-added", G_CALLBACK (db_pad_added_cb), dec); dec->db_pad_removed_id = g_signal_connect (dec->decodebin, "pad-removed", G_CALLBACK (db_pad_removed_cb), dec); dec->db_select_stream_id = g_signal_connect (dec->decodebin, "select-stream", G_CALLBACK (db_select_stream_cb), dec); dec->db_about_to_finish_id = g_signal_connect (dec->decodebin, "about-to-finish", G_CALLBACK (db_about_to_finish_cb), dec); GST_OBJECT_FLAG_SET (dec, GST_ELEMENT_FLAG_SOURCE); gst_bin_set_suppressed_flags (GST_BIN (dec), GST_ELEMENT_FLAG_SOURCE | GST_ELEMENT_FLAG_SINK); item = new_play_item (dec); dec->play_items = g_list_append (dec->play_items, item); /* The initial play item is automatically the input and output one */ dec->input_item = dec->output_item = item; } static void gst_uri_decode_bin3_dispose (GObject * obj) { GstURIDecodeBin3 *dec = GST_URI_DECODE_BIN3 (obj); GList *iter; GST_DEBUG_OBJECT (obj, "Disposing"); /* Free all play items */ for (iter = dec->play_items; iter; iter = iter->next) { GstPlayItem *item = iter->data; free_play_item (dec, item); } g_list_free (dec->play_items); dec->play_items = NULL; g_clear_pointer (&dec->download_dir, g_free); g_mutex_clear (&dec->play_items_lock); gst_clear_caps (&dec->caps); G_OBJECT_CLASS (parent_class)->dispose (obj); } static GstStateChangeReturn activate_source_item (GstSourceItem * item) { GstSourceHandler *handler = item->handler; if (handler == NULL) { GST_WARNING ("Can't activate item without a handler"); return GST_STATE_CHANGE_FAILURE; } g_object_set (handler->urisourcebin, "uri", item->uri, NULL); if (!handler->active) { gst_bin_add ((GstBin *) handler->uridecodebin, handler->urisourcebin); handler->active = TRUE; } if (!gst_element_sync_state_with_parent (handler->urisourcebin)) return GST_STATE_CHANGE_FAILURE; return GST_STATE_CHANGE_SUCCESS; } static void link_src_pad_to_db3 (GstURIDecodeBin3 * uridecodebin, GstSourcePad * spad) { GstSourceHandler *handler = spad->handler; GstPad *sinkpad = NULL; /* Try to link to main sink pad only if it's from a main handler */ if (handler->is_main_source) { sinkpad = gst_element_get_static_pad (uridecodebin->decodebin, "sink"); if (gst_pad_is_linked (sinkpad)) { gst_object_unref (sinkpad); sinkpad = NULL; } } if (sinkpad == NULL) { sinkpad = gst_element_request_pad_simple (uridecodebin->decodebin, "sink_%u"); spad->db3_pad_is_request = TRUE; } if (sinkpad) { GstPadLinkReturn res; GST_DEBUG_OBJECT (uridecodebin, "Linking %" GST_PTR_FORMAT " to %" GST_PTR_FORMAT, spad->src_pad, sinkpad); res = gst_pad_link (spad->src_pad, sinkpad); gst_object_unref (sinkpad); if (GST_PAD_LINK_FAILED (res)) { GST_ERROR_OBJECT (uridecodebin, "failed to link pad %s:%s to decodebin, reason %s (%d)", GST_DEBUG_PAD_NAME (spad->src_pad), gst_pad_link_get_name (res), res); return; } } else { GST_ERROR_OBJECT (uridecodebin, "Could not get a sinkpad from decodebin3"); return; } spad->db3_sink_pad = sinkpad; /* Activate sub_item after the main source activation was finished */ if (handler->is_main_source && handler->play_item->sub_item && !handler->play_item->sub_item->handler) { GstStateChangeReturn ret; /* The state lock is taken to ensure we can atomically change the * urisourcebin back to NULL in case of failures */ GST_STATE_LOCK (uridecodebin); handler->play_item->sub_item->handler = new_source_handler (uridecodebin, handler->play_item, FALSE); ret = activate_source_item (handler->play_item->sub_item); if (ret == GST_STATE_CHANGE_FAILURE) { free_source_handler (uridecodebin, handler->play_item->sub_item->handler, FALSE); handler->play_item->sub_item->handler = NULL; GST_STATE_UNLOCK (uridecodebin); goto sub_item_activation_failed; } GST_STATE_UNLOCK (uridecodebin); } return; sub_item_activation_failed: { GST_ERROR_OBJECT (uridecodebin, "failed to activate subtitle playback item"); return; } } static GList * get_all_play_item_source_pads (GstPlayItem * item) { GList *ret = NULL; if (item->main_item && item->main_item->handler) { ret = g_list_copy (item->main_item->handler->sourcepads); } if (item->sub_item && item->sub_item->handler) { ret = g_list_concat (ret, g_list_copy (item->sub_item->handler->sourcepads)); } return ret; } static GstSourcePad * find_matching_source_pad (GList * candidates, GstSourcePad * target) { GList *iter; GstStream *stream = target->stream; GST_DEBUG_OBJECT (target->src_pad, "Find match for stream %" GST_PTR_FORMAT, stream); for (iter = candidates; iter; iter = iter->next) { GstSourcePad *cand = iter->data; if (!cand->db3_sink_pad) continue; /* Target doesn't have a specific GstStream, return the first result */ if (!stream) return cand; if (gst_stream_get_stream_type (cand->stream) == gst_stream_get_stream_type (stream)) return cand; } return NULL; } /* PLAY_ITEMS_LOCK held * * Switch the input play item to the next one */ static void switch_and_activate_input_locked (GstURIDecodeBin3 * uridecodebin, GstPlayItem * new_item) { GList *new_pads = get_all_play_item_source_pads (new_item); GList *old_pads = get_all_play_item_source_pads (uridecodebin->input_item); GList *to_activate = NULL; GList *iternew, *iterold; gboolean inactive_previous_item = old_pads == NULL; GstMessage *pending_buffering_msg = NULL; gboolean pending_about_to_finish = FALSE; /* Deactivate old urisourcebins first ? Problem is they might remove the pads */ /* Go over new item source pads and figure out a candidate replacement in */ /* Figure out source pad matches */ for (iternew = new_pads; iternew; iternew = iternew->next) { GstSourcePad *new_spad = iternew->data; GstSourcePad *old_spad = find_matching_source_pad (old_pads, new_spad); if (old_spad) { GST_DEBUG_OBJECT (uridecodebin, "Relinking %s:%s from %s:%s to %s:%s", GST_DEBUG_PAD_NAME (old_spad->db3_sink_pad), GST_DEBUG_PAD_NAME (old_spad->src_pad), GST_DEBUG_PAD_NAME (new_spad->src_pad)); gst_pad_unlink (old_spad->src_pad, old_spad->db3_sink_pad); new_spad->db3_sink_pad = old_spad->db3_sink_pad; new_spad->db3_pad_is_request = old_spad->db3_pad_is_request; old_spad->db3_sink_pad = NULL; /* NOTE : Pad will be linked further down */ old_pads = g_list_remove (old_pads, old_spad); } else { GST_DEBUG_OBJECT (new_spad->src_pad, "Needs a new pad"); to_activate = g_list_append (to_activate, new_spad); } } /* If the old pads contains the static decodebin3 sinkpad *and* we have a new * pad to activate, we re-use it */ if (to_activate) { /* Remove unmatched old source pads */ for (iterold = old_pads; iterold; iterold = iterold->next) { GstSourcePad *old_spad = iterold->data; if (old_spad->db3_sink_pad && !old_spad->db3_pad_is_request) { GstSourcePad *new_spad = to_activate->data; GST_DEBUG_OBJECT (uridecodebin, "Static sinkpad can be re-used"); GST_DEBUG_OBJECT (uridecodebin, "Relinking %s:%s from %s:%s to %s:%s", GST_DEBUG_PAD_NAME (old_spad->db3_sink_pad), GST_DEBUG_PAD_NAME (old_spad->src_pad), GST_DEBUG_PAD_NAME (new_spad->src_pad)); gst_pad_unlink (old_spad->src_pad, old_spad->db3_sink_pad); new_spad->db3_sink_pad = old_spad->db3_sink_pad; new_spad->db3_pad_is_request = old_spad->db3_pad_is_request; old_spad->db3_sink_pad = NULL; /* NOTE : Pad will be linked further down */ old_pads = g_list_remove (old_pads, old_spad); to_activate = g_list_remove (to_activate, new_spad); break; } } } /* Remove unmatched old source pads */ for (iterold = old_pads; iterold; iterold = iterold->next) { GstSourcePad *old_spad = iterold->data; if (old_spad->db3_sink_pad && old_spad->db3_pad_is_request) { GST_DEBUG_OBJECT (uridecodebin, "Releasing no longer used db3 pad"); gst_element_release_request_pad (uridecodebin->decodebin, old_spad->db3_sink_pad); old_spad->db3_sink_pad = NULL; } } /* Link existing pads */ for (iternew = new_pads; iternew; iternew = iternew->next) { GstSourcePad *new_spad = iternew->data; if (new_spad->db3_sink_pad) gst_pad_link (new_spad->src_pad, new_spad->db3_sink_pad); } /* Request (and link) new pads */ for (iternew = to_activate; iternew; iternew = iternew->next) { GstSourcePad *new_spad = iternew->data; link_src_pad_to_db3 (uridecodebin, new_spad); } /* Unblock all new item source pads */ for (iternew = new_pads; iternew; iternew = iternew->next) { GstSourcePad *new_spad = iternew->data; if (new_spad->block_probe_id) { gst_pad_remove_probe (new_spad->src_pad, new_spad->block_probe_id); new_spad->block_probe_id = 0; } } g_list_free (new_pads); g_list_free (old_pads); /* Deactivate old input item (by removing the source components). The final * removal of this play item will be done once decodebin3 starts output the * content of the new play item. */ if (uridecodebin->input_item->main_item) { free_source_item (uridecodebin, uridecodebin->input_item->main_item); uridecodebin->input_item->main_item = NULL; } if (uridecodebin->input_item->sub_item) { free_source_item (uridecodebin, uridecodebin->input_item->sub_item); uridecodebin->input_item->sub_item = NULL; } /* If the previous play item was not active at all (i.e. was never linked to * decodebin3), this one *also* becomes the output one */ if (inactive_previous_item) { GST_DEBUG_OBJECT (uridecodebin, "Previous play item was never activated, discarding"); uridecodebin->play_items = g_list_remove (uridecodebin->play_items, uridecodebin->input_item); free_play_item (uridecodebin, uridecodebin->input_item); uridecodebin->output_item = new_item; } /* and set new one as input item */ uridecodebin->input_item = new_item; pending_about_to_finish = new_item->pending_about_to_finish; if (new_item->main_item->handler->pending_buffering_msg) { pending_buffering_msg = new_item->main_item->handler->pending_buffering_msg; new_item->main_item->handler->pending_buffering_msg = NULL; } /* If we have to post message or emit signals, it might trigger some * re-entring actions (like setting the next URI). Make sure we release the * lock when posting/emitting */ if (pending_buffering_msg || pending_about_to_finish) { PLAY_ITEMS_UNLOCK (uridecodebin); /* If the new source is already drained, propagate about-to-finish */ if (pending_about_to_finish) { emit_and_handle_about_to_finish (uridecodebin, new_item); } /* Finally propagate pending buffering message */ if (pending_buffering_msg) { GST_DEBUG_OBJECT (uridecodebin, "Posting pending buffering message %" GST_PTR_FORMAT, pending_buffering_msg); GST_BIN_CLASS (parent_class)->handle_message ((GstBin *) uridecodebin, pending_buffering_msg); } PLAY_ITEMS_LOCK (uridecodebin); } } static GstPadProbeReturn uri_src_probe (GstPad * pad, GstPadProbeInfo * info, GstSourcePad * srcpad) { GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info); GstSourceHandler *handler = srcpad->handler; GstPadProbeReturn ret = GST_PAD_PROBE_OK; GST_DEBUG_OBJECT (pad, "event %" GST_PTR_FORMAT, event); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_EOS: { GstPad *peer; /* Propagate the EOS *before* triggering any potential switch */ peer = gst_pad_get_peer (pad); if (peer) { gst_pad_send_event (peer, event); gst_object_unref (peer); } else { /* No peer, just drop it (since we're returning HANDLED below) */ gst_event_unref (event); } PLAY_ITEMS_LOCK (handler->uridecodebin); /* EOS : Mark pad as EOS */ srcpad->saw_eos = TRUE; /* Check if the input play item is fully EOS. If yes and there is a * pending play item, switch to it */ if (handler->play_item == handler->uridecodebin->input_item && play_item_is_eos (handler->play_item)) { g_cond_broadcast (&handler->uridecodebin->input_source_drained); } PLAY_ITEMS_UNLOCK (handler->uridecodebin); ret = GST_PAD_PROBE_HANDLED; break; } case GST_EVENT_STREAM_START: { GstStream *stream = NULL; GstQuery *q = gst_query_new_selectable (); guint group_id = GST_GROUP_ID_INVALID; srcpad->saw_eos = FALSE; gst_event_parse_group_id (event, &group_id); /* Unify group id */ if (handler->play_item->group_id == GST_GROUP_ID_INVALID) { GST_DEBUG_OBJECT (pad, "Setting play item to group_id %" G_GUINT32_FORMAT, group_id); handler->play_item->group_id = group_id; } else if (handler->play_item->group_id != group_id) { GST_DEBUG_OBJECT (pad, "Updating event group-id to %" G_GUINT32_FORMAT, handler->play_item->group_id); event = gst_event_make_writable (event); GST_PAD_PROBE_INFO_DATA (info) = event; gst_event_set_group_id (event, handler->play_item->group_id); } gst_event_parse_stream (event, &stream); if (stream) { GST_DEBUG_OBJECT (srcpad->src_pad, "Got GstStream %" GST_PTR_FORMAT, stream); gst_object_replace ((GstObject **) & srcpad->stream, (GstObject *) stream); gst_object_unref (stream); } /* Remember whether upstream is selectable or not */ if (gst_pad_query (pad, q)) { PLAY_ITEMS_LOCK (handler->uridecodebin); gst_query_parse_selectable (q, &handler->upstream_selected); GST_DEBUG_OBJECT (srcpad->src_pad, "Upstream is selectable : %d", handler->upstream_selected); PLAY_ITEMS_UNLOCK (handler->uridecodebin); } gst_query_unref (q); break; } case GST_EVENT_STREAM_COLLECTION: { GstStreamCollection *collection = NULL; PLAY_ITEMS_LOCK (handler->uridecodebin); if (!handler->upstream_selected) { gst_event_parse_stream_collection (event, &collection); if (collection) { GST_DEBUG_OBJECT (srcpad->src_pad, "Seen collection with %d streams", gst_stream_collection_get_size (collection)); if (handler->expected_pads == 1) { handler->expected_pads = gst_stream_collection_get_size (collection); } gst_object_unref (collection); } } PLAY_ITEMS_UNLOCK (handler->uridecodebin); break; } case GST_EVENT_SEGMENT: { srcpad->saw_eos = FALSE; break; } default: break; } return ret; } static GstPadProbeReturn uri_src_block_probe (GstPad * pad, GstPadProbeInfo * info, GstSourcePad * srcpad) { GstPadProbeReturn ret = GST_PAD_PROBE_OK; GstSourceHandler *handler = srcpad->handler; /* We only block on buffers, buffer list and gap events. Everything else is * passed to the regular (non-blocking) probe */ if (GST_IS_EVENT (GST_PAD_PROBE_INFO_DATA (info)) && GST_EVENT_TYPE (GST_PAD_PROBE_INFO_EVENT (info)) != GST_EVENT_GAP) { return GST_PAD_PROBE_PASS; } GST_DEBUG_OBJECT (pad, "blocking on buffer or gap"); PLAY_ITEMS_LOCK (handler->uridecodebin); if (srcpad->block_probe_id == 0) { GST_DEBUG_OBJECT (pad, "pad has already been unblocked"); ret = GST_PAD_PROBE_REMOVE; } else if (play_item_is_eos (handler->uridecodebin->input_item)) { GST_DEBUG_OBJECT (handler->uridecodebin, "We can switch over to the next input item"); switch_and_activate_input_locked (handler->uridecodebin, handler->play_item); ret = GST_PAD_PROBE_REMOVE; } else if (play_item_has_all_pads (handler->play_item)) { /* We have all expected pads for this play item but the current input * play item isn't done yet, wait for it */ GST_DEBUG_OBJECT (pad, "Waiting for input source to be drained"); g_cond_wait (&handler->uridecodebin->input_source_drained, &handler->uridecodebin->play_items_lock); if (g_atomic_int_get (&handler->uridecodebin->shutdown)) goto shutdown; if (play_item_is_eos (handler->uridecodebin->input_item)) { GST_DEBUG_OBJECT (handler->uridecodebin, "We can switch over to the next input item"); switch_and_activate_input_locked (handler->uridecodebin, handler->play_item); } ret = GST_PAD_PROBE_REMOVE; } PLAY_ITEMS_UNLOCK (handler->uridecodebin); return ret; /* ERRORS */ shutdown: { GST_LOG_OBJECT (pad, "Shutting down"); /* We are shutting down, we both want to remove this probe and propagate a * GST_FLOW_FLUSHING upstream (to cause tasks to stop) */ if (srcpad->block_probe_id) gst_pad_remove_probe (pad, srcpad->block_probe_id); srcpad->block_probe_id = 0; PLAY_ITEMS_UNLOCK (handler->uridecodebin); GST_PAD_PROBE_INFO_FLOW_RETURN (info) = GST_FLOW_FLUSHING; gst_mini_object_unref (GST_PAD_PROBE_INFO_DATA (info)); return GST_PAD_PROBE_HANDLED; } } static void src_pad_added_cb (GstElement * element, GstPad * pad, GstSourceHandler * handler) { GstSourcePad *spad = g_new0 (GstSourcePad, 1); GstURIDecodeBin3 *uridecodebin; uridecodebin = handler->uridecodebin; PLAY_ITEMS_LOCK (uridecodebin); GST_DEBUG_OBJECT (uridecodebin, "New pad %" GST_PTR_FORMAT " from source %" GST_PTR_FORMAT, pad, element); /* Register the new pad information with the source handler */ spad->handler = handler; spad->src_pad = pad; spad->event_probe_id = gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM, (GstPadProbeCallback) uri_src_probe, spad, NULL); handler->sourcepads = g_list_append (handler->sourcepads, spad); /* Can the pad be linked straight away to db3 ? * This can happen if: * * It is the initial play item * * It is part of the current input item */ if (handler->play_item == uridecodebin->input_item) { GST_DEBUG_OBJECT (uridecodebin, "Pad is part of current input item, linking"); link_src_pad_to_db3 (uridecodebin, spad); PLAY_ITEMS_UNLOCK (uridecodebin); return; } /* This pad is not from the current input item. We add a blocking probe to * wait until we block on the new urisourcebin streaming thread and can * switch */ GST_DEBUG_OBJECT (uridecodebin, "Blocking input pad"); spad->block_probe_id = gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM, (GstPadProbeCallback) uri_src_block_probe, spad, NULL); PLAY_ITEMS_UNLOCK (uridecodebin); } static GstSourcePad * handler_get_source_pad (GstSourceHandler * handler, GstPad * srcpad) { GList *iter; for (iter = handler->sourcepads; iter; iter = iter->next) { GstSourcePad *spad = iter->data; if (spad->src_pad == srcpad) return spad; } return NULL; } static void src_pad_removed_cb (GstElement * element, GstPad * pad, GstSourceHandler * handler) { GstURIDecodeBin3 *uridecodebin = handler->uridecodebin; GstSourcePad *spad = handler_get_source_pad (handler, pad); if (!spad) return; GST_DEBUG_OBJECT (uridecodebin, "Source %" GST_PTR_FORMAT " removed pad %" GST_PTR_FORMAT " peer %" GST_PTR_FORMAT, element, pad, spad->db3_sink_pad); if (spad->db3_sink_pad && spad->db3_pad_is_request) gst_element_release_request_pad (uridecodebin->decodebin, spad->db3_sink_pad); if (spad->stream) gst_object_unref (spad->stream); handler->sourcepads = g_list_remove (handler->sourcepads, spad); g_free (spad); } static void src_source_setup_cb (GstElement * element, GstElement * source, GstSourceHandler * handler) { g_signal_emit (handler->uridecodebin, gst_uri_decode_bin3_signals[SIGNAL_SOURCE_SETUP], 0, source, NULL); } static void src_about_to_finish_cb (GstElement * element, GstSourceHandler * handler) { GST_LOG_OBJECT (handler->uridecodebin, "about to finish from %s", GST_OBJECT_NAME (element)); emit_and_handle_about_to_finish (handler->uridecodebin, handler->play_item); } static GstSourceHandler * new_source_handler (GstURIDecodeBin3 * uridecodebin, GstPlayItem * item, gboolean is_main) { GstSourceHandler *handler; handler = g_new0 (GstSourceHandler, 1); handler->uridecodebin = uridecodebin; handler->play_item = item; handler->is_main_source = is_main; handler->urisourcebin = gst_element_factory_make ("urisourcebin", NULL); /* Set pending properties */ g_object_set (handler->urisourcebin, "connection-speed", uridecodebin->connection_speed / 1000, "download", uridecodebin->download, "download-dir", uridecodebin->download_dir, "use-buffering", uridecodebin->use_buffering, "buffer-duration", uridecodebin->buffer_duration, "buffer-size", uridecodebin->buffer_size, "ring-buffer-max-size", uridecodebin->ring_buffer_max_size, "parse-streams", TRUE, NULL); handler->pad_added_id = g_signal_connect (handler->urisourcebin, "pad-added", (GCallback) src_pad_added_cb, handler); handler->pad_removed_id = g_signal_connect (handler->urisourcebin, "pad-removed", (GCallback) src_pad_removed_cb, handler); handler->source_setup_id = g_signal_connect (handler->urisourcebin, "source-setup", (GCallback) src_source_setup_cb, handler); handler->about_to_finish_id = g_signal_connect (handler->urisourcebin, "about-to-finish", (GCallback) src_about_to_finish_cb, handler); handler->expected_pads = 1; return handler; } static gboolean source_handler_is_eos (GstSourceHandler * handler) { GList *iter; for (iter = handler->sourcepads; iter; iter = iter->next) { GstSourcePad *spad = iter->data; if (!spad->saw_eos) return FALSE; } return TRUE; } static void source_handler_set_eos (GstSourceHandler * handler) { GList *iter; for (iter = handler->sourcepads; iter; iter = iter->next) { GstSourcePad *spad = iter->data; spad->saw_eos = TRUE; } } static void gst_uri_decode_bin3_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstURIDecodeBin3 *dec = GST_URI_DECODE_BIN3 (object); switch (prop_id) { case PROP_URI: PLAY_ITEMS_LOCK (dec); gst_uri_decode_bin3_set_uri (dec, g_value_get_string (value)); PLAY_ITEMS_UNLOCK (dec); break; case PROP_SUBURI: gst_uri_decode_bin3_set_suburi (dec, g_value_get_string (value)); break; case PROP_CONNECTION_SPEED: GST_OBJECT_LOCK (dec); dec->connection_speed = g_value_get_uint64 (value) * 1000; GST_OBJECT_UNLOCK (dec); break; case PROP_BUFFER_SIZE: dec->buffer_size = g_value_get_int (value); break; case PROP_BUFFER_DURATION: dec->buffer_duration = g_value_get_int64 (value); break; case PROP_DOWNLOAD: dec->download = g_value_get_boolean (value); break; case PROP_DOWNLOAD_DIR: dec->download_dir = g_value_dup_string (value); break; case PROP_USE_BUFFERING: dec->use_buffering = g_value_get_boolean (value); break; case PROP_RING_BUFFER_MAX_SIZE: dec->ring_buffer_max_size = g_value_get_uint64 (value); 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_INSTANT_URI: GST_OBJECT_LOCK (dec); dec->instant_uri = g_value_get_boolean (value); GST_OBJECT_UNLOCK (dec); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_uri_decode_bin3_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstURIDecodeBin3 *dec = GST_URI_DECODE_BIN3 (object); switch (prop_id) { case PROP_URI: { GstPlayItem *item = dec->play_items->data; /* Return from the head */ if (item->main_item) g_value_set_string (value, item->main_item->uri); else g_value_set_string (value, NULL); break; } case PROP_CURRENT_URI: { if (dec->output_item && dec->output_item->main_item) { g_value_set_string (value, dec->output_item->main_item->uri); } else { g_value_set_string (value, NULL); } break; } case PROP_SUBURI: { GstPlayItem *item = dec->play_items->data; /* Return from the head */ if (item->sub_item) g_value_set_string (value, item->sub_item->uri); else g_value_set_string (value, NULL); break; } case PROP_CURRENT_SUBURI: { if (dec->output_item && dec->output_item->sub_item) { g_value_set_string (value, dec->output_item->sub_item->uri); } else { g_value_set_string (value, NULL); } break; } case PROP_SOURCE: { GST_OBJECT_LOCK (dec); g_value_set_object (value, dec->source); GST_OBJECT_UNLOCK (dec); break; } case PROP_CONNECTION_SPEED: GST_OBJECT_LOCK (dec); g_value_set_uint64 (value, dec->connection_speed / 1000); GST_OBJECT_UNLOCK (dec); break; case PROP_BUFFER_SIZE: GST_OBJECT_LOCK (dec); g_value_set_int (value, dec->buffer_size); GST_OBJECT_UNLOCK (dec); break; case PROP_BUFFER_DURATION: GST_OBJECT_LOCK (dec); g_value_set_int64 (value, dec->buffer_duration); GST_OBJECT_UNLOCK (dec); break; case PROP_DOWNLOAD: g_value_set_boolean (value, dec->download); break; case PROP_DOWNLOAD_DIR: g_value_set_string (value, dec->download_dir); break; case PROP_USE_BUFFERING: g_value_set_boolean (value, dec->use_buffering); break; case PROP_RING_BUFFER_MAX_SIZE: g_value_set_uint64 (value, dec->ring_buffer_max_size); break; case PROP_CAPS: GST_OBJECT_LOCK (dec); g_value_set_boxed (value, dec->caps); GST_OBJECT_UNLOCK (dec); break; case PROP_INSTANT_URI: GST_OBJECT_LOCK (dec); g_value_set_boolean (value, dec->instant_uri); GST_OBJECT_UNLOCK (dec); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } /* lock_state: TRUE if the STATE LOCK should be taken. Set to FALSE if the * caller already has taken it */ static void free_source_handler (GstURIDecodeBin3 * uridecodebin, GstSourceHandler * handler, gboolean lock_state) { GST_LOG_OBJECT (uridecodebin, "source handler %p", handler); if (handler->active) { GList *iter; if (lock_state) GST_STATE_LOCK (uridecodebin); GST_LOG_OBJECT (uridecodebin, "Removing %" GST_PTR_FORMAT, handler->urisourcebin); for (iter = handler->sourcepads; iter; iter = iter->next) { GstSourcePad *spad = iter->data; if (spad->block_probe_id) gst_pad_remove_probe (spad->src_pad, spad->block_probe_id); } gst_element_set_state (handler->urisourcebin, GST_STATE_NULL); gst_bin_remove ((GstBin *) uridecodebin, handler->urisourcebin); if (lock_state) GST_STATE_UNLOCK (uridecodebin); g_list_free (handler->sourcepads); } if (handler->pending_buffering_msg) gst_message_unref (handler->pending_buffering_msg); g_free (handler); } static GstSourceItem * new_source_item (GstURIDecodeBin3 * dec, GstPlayItem * item, gchar * uri) { GstSourceItem *sourceitem = g_new0 (GstSourceItem, 1); sourceitem->play_item = item; sourceitem->uri = uri; return sourceitem; } static void free_source_item (GstURIDecodeBin3 * uridecodebin, GstSourceItem * item) { GST_LOG_OBJECT (uridecodebin, "source item %p", item); if (item->handler) free_source_handler (uridecodebin, item->handler, TRUE); g_free (item->uri); g_free (item); } static void source_item_set_uri (GstSourceItem * item, const gchar * uri) { if (item->uri) g_free (item->uri); item->uri = g_strdup (uri); if (item->handler) { g_object_set (item->handler->urisourcebin, "uri", uri, NULL); } } static GstPlayItem * new_play_item (GstURIDecodeBin3 * dec) { GstPlayItem *item = g_new0 (GstPlayItem, 1); item->uridecodebin = dec; item->group_id = GST_GROUP_ID_INVALID; return item; } static void free_play_item (GstURIDecodeBin3 * dec, GstPlayItem * item) { GST_LOG_OBJECT (dec, "play item %p", item); if (item->main_item) free_source_item (dec, item->main_item); if (item->sub_item) free_source_item (dec, item->sub_item); g_free (item); } static void play_item_set_uri (GstPlayItem * item, const gchar * uri) { if (!uri) return; if (!item->main_item) { item->main_item = new_source_item (item->uridecodebin, item, g_strdup (uri)); } else { source_item_set_uri (item->main_item, uri); } } static void play_item_set_suburi (GstPlayItem * item, const gchar * uri) { if (!uri) { if (item->sub_item) { free_source_item (item->uridecodebin, item->sub_item); item->sub_item = NULL; } return; } if (!item->sub_item) { item->sub_item = new_source_item (item->uridecodebin, item, g_strdup (uri)); } else { source_item_set_uri (item->sub_item, uri); } } static gboolean play_item_is_eos (GstPlayItem * item) { if (item->main_item && item->main_item->handler) { if (!source_handler_is_eos (item->main_item->handler)) return FALSE; } if (item->sub_item && item->sub_item->handler) { if (!source_handler_is_eos (item->sub_item->handler)) return FALSE; } return TRUE; } /* Mark all sourcepads of a play item as EOS. Used in pull-mode */ static void play_item_set_eos (GstPlayItem * item) { if (item->main_item && item->main_item->handler) source_handler_set_eos (item->main_item->handler); if (item->sub_item && item->sub_item->handler) source_handler_set_eos (item->sub_item->handler); } static gboolean play_item_has_all_pads (GstPlayItem * item) { GstSourceHandler *handler; if (item->main_item && item->main_item->handler) { handler = item->main_item->handler; if (handler->expected_pads != g_list_length (handler->sourcepads)) return FALSE; } if (item->sub_item && item->sub_item->handler) { handler = item->sub_item->handler; if (handler->expected_pads != g_list_length (handler->sourcepads)) return FALSE; } return TRUE; } /* Returns the next inactive play item. If none available, it will create one * and add it to the list of play items */ static GstPlayItem * next_inactive_play_item (GstURIDecodeBin3 * dec) { GstPlayItem *res; GList *iter; for (iter = dec->play_items; iter; iter = iter->next) { res = iter->data; if (!res->active) return res; } GST_DEBUG_OBJECT (dec, "No inactive play items, creating a new one"); res = new_play_item (dec); dec->play_items = g_list_append (dec->play_items, res); return res; } static GstPadProbeReturn uri_src_ignore_block_probe (GstPad * pad, GstPadProbeInfo * info, GstSourcePad * srcpad) { GST_DEBUG_OBJECT (pad, "blocked"); return GST_PAD_PROBE_OK; } /* PLAY_ITEMS_LOCK held */ static void gst_uri_decode_bin3_set_uri (GstURIDecodeBin3 * dec, const gchar * uri) { GstPlayItem *item; gboolean start_item = FALSE; GST_DEBUG_OBJECT (dec, "uri: %s", uri); item = next_inactive_play_item (dec); play_item_set_uri (item, uri); if (dec->instant_uri && item != dec->input_item) { GList *old_pads = get_all_play_item_source_pads (dec->input_item); GList *iter; /* Switch immediately if not the current input item */ GST_DEBUG_OBJECT (dec, "Switching immediately"); /* FLUSH START all input pads */ for (iter = old_pads; iter; iter = iter->next) { GstSourcePad *spad = iter->data; if (spad->db3_sink_pad) { /* Mark all input pads as EOS */ gst_pad_send_event (spad->db3_sink_pad, gst_event_new_flush_start ()); } /* Block all input source pads */ spad->block_probe_id = gst_pad_add_probe (spad->src_pad, GST_PAD_PROBE_TYPE_IDLE, (GstPadProbeCallback) uri_src_ignore_block_probe, spad, NULL); spad->saw_eos = TRUE; } for (iter = old_pads; iter; iter = iter->next) { /* FLUSH_STOP all current input pads */ GstSourcePad *spad = iter->data; if (spad->db3_sink_pad) { gst_pad_send_event (spad->db3_sink_pad, gst_event_new_flush_stop (TRUE)); } } start_item = TRUE; } else if (dec->input_item->posted_about_to_finish) { GList *iter = g_list_find (dec->play_items, dec->input_item); /* If the current item is finishing and the new item is the one just after, * we need to activate it */ if (iter && iter->next && iter->next->data == item) { GST_DEBUG_OBJECT (dec, "Starting new entry (gapless mode)"); start_item = TRUE; } } if (start_item) { /* Start new item */ activate_play_item (item); } } static void gst_uri_decode_bin3_set_suburi (GstURIDecodeBin3 * dec, const gchar * uri) { GstPlayItem *item; GST_DEBUG_OBJECT (dec, "suburi: %s", uri); /* FIXME : Handle instant-uri-change. Should we just apply it automatically to * the current input item ? */ if (dec->input_item->posted_about_to_finish) { /* WARNING : Setting sub-uri in gapless mode is unreliable */ GST_ELEMENT_WARNING (dec, CORE, NOT_IMPLEMENTED, ("Setting sub-uri in gapless mode is not handled"), ("Setting sub-uri in gapless mode is not implemented")); } else { item = next_inactive_play_item (dec); play_item_set_suburi (item, uri); } } /* Sync source handlers for the given play item. Might require creating/removing some * and/or configure the handlers accordingly */ static GstStateChangeReturn assign_handlers_to_item (GstURIDecodeBin3 * dec, GstPlayItem * item) { GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; if (item->main_item == NULL) return GST_STATE_CHANGE_FAILURE; /* Create missing handlers */ if (item->main_item->handler == NULL) { /* The state lock is taken to ensure we can atomically change the * urisourcebin back to NULL in case of failures */ GST_STATE_LOCK (dec); item->main_item->handler = new_source_handler (dec, item, TRUE); ret = activate_source_item (item->main_item); if (ret == GST_STATE_CHANGE_FAILURE) { free_source_handler (dec, item->main_item->handler, FALSE); item->main_item->handler = NULL; } GST_STATE_UNLOCK (dec); } return ret; } /* Called to activate the next play item */ static GstStateChangeReturn activate_play_item (GstPlayItem * item) { GstStateChangeReturn ret; GST_DEBUG_OBJECT (item->uridecodebin, "Activating play item"); ret = assign_handlers_to_item (item->uridecodebin, item); if (ret != GST_STATE_CHANGE_FAILURE) { item->active = TRUE; } return ret; } /* Remove all but the last play item */ static void purge_play_items (GstURIDecodeBin3 * dec) { GST_DEBUG_OBJECT (dec, "Purging play items"); PLAY_ITEMS_LOCK (dec); g_cond_broadcast (&dec->input_source_drained); while (dec->play_items && dec->play_items->next) { GstPlayItem *item = dec->play_items->data; dec->play_items = g_list_remove (dec->play_items, item); free_play_item (dec, item); } dec->output_item = dec->input_item = dec->play_items->data; dec->output_item->posted_about_to_finish = FALSE; PLAY_ITEMS_UNLOCK (dec); } static GstStateChangeReturn gst_uri_decode_bin3_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn ret; GstURIDecodeBin3 *uridecodebin = (GstURIDecodeBin3 *) element; switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: g_object_set (uridecodebin->decodebin, "caps", uridecodebin->caps, NULL); break; case GST_STATE_CHANGE_READY_TO_PAUSED: g_atomic_int_set (&uridecodebin->shutdown, 0); ret = activate_play_item (uridecodebin->input_item); current_updated (uridecodebin); if (ret == GST_STATE_CHANGE_FAILURE) goto failure; break; case GST_STATE_CHANGE_PAUSED_TO_READY: PLAY_ITEMS_LOCK (uridecodebin); g_atomic_int_set (&uridecodebin->shutdown, 1); g_cond_broadcast (&uridecodebin->input_source_drained); PLAY_ITEMS_UNLOCK (uridecodebin); break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); if (ret == GST_STATE_CHANGE_FAILURE) goto failure; switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: /* Remove all play items *but* the last one, which becomes the current entry */ purge_play_items (uridecodebin); uridecodebin->input_item->active = FALSE; break; default: break; } return ret; /* ERRORS */ failure: { if (transition == GST_STATE_CHANGE_READY_TO_PAUSED) purge_play_items (uridecodebin); return ret; } } static GstSourceHandler * find_source_handler_for_element (GstURIDecodeBin3 * uridecodebin, GstObject * element) { GList *iter; for (iter = uridecodebin->play_items; iter; iter = iter->next) { GstPlayItem *item = iter->data; if (item->main_item && item->main_item->handler) { GstSourceHandler *handler = item->main_item->handler; if (gst_object_has_as_ancestor (element, (GstObject *) handler->urisourcebin)) return handler; } if (item->sub_item && item->sub_item->handler) { GstSourceHandler *handler = item->sub_item->handler; if (gst_object_has_as_ancestor (element, (GstObject *) handler->urisourcebin)) return handler; } } return NULL; } static GstMessage * gst_uri_decode_bin3_handle_redirection (GstURIDecodeBin3 * uridecodebin, GstMessage * message, const GstStructure * details) { gchar *uri = NULL; GstSourceHandler *handler; const gchar *location; gchar *current_uri; PLAY_ITEMS_LOCK (uridecodebin); /* Find the matching handler (if any) */ handler = find_source_handler_for_element (uridecodebin, message->src); if (!handler || !handler->play_item || !handler->play_item->main_item) goto beach; current_uri = handler->play_item->main_item->uri; location = gst_structure_get_string ((GstStructure *) details, "redirect-location"); GST_DEBUG_OBJECT (uridecodebin, "Handle redirection message from '%s' to '%s", current_uri, location); if (gst_uri_is_valid (location)) { uri = g_strdup (location); } else if (current_uri) { uri = gst_uri_join_strings (current_uri, location); } if (!uri) goto beach; if (g_strcmp0 (current_uri, uri)) { gboolean was_instant = uridecodebin->instant_uri; /* We only want to handle the redirection once */ if (!handler->saw_redirection) { handler->saw_redirection = TRUE; GST_DEBUG_OBJECT (uridecodebin, "Doing instant switch to '%s'", uri); uridecodebin->instant_uri = TRUE; /* Force instant switch */ gst_uri_decode_bin3_set_uri (uridecodebin, uri); uridecodebin->instant_uri = was_instant; } gst_message_unref (message); message = NULL; } g_free (uri); beach: PLAY_ITEMS_UNLOCK (uridecodebin); return message; } static void gst_uri_decode_bin3_handle_message (GstBin * bin, GstMessage * msg) { GstURIDecodeBin3 *uridecodebin = (GstURIDecodeBin3 *) bin; switch (GST_MESSAGE_TYPE (msg)) { case GST_MESSAGE_STREAMS_SELECTED: { GstSourceHandler *handler; GST_DEBUG_OBJECT (uridecodebin, "Handle streams selected"); PLAY_ITEMS_LOCK (uridecodebin); /* Find the matching handler (if any) */ if ((handler = find_source_handler_for_element (uridecodebin, msg->src))) { handler->expected_pads = gst_message_streams_selected_get_size (msg); GST_DEBUG_OBJECT (uridecodebin, "Got streams-selected for %s with %d streams selected", GST_ELEMENT_NAME (handler->urisourcebin), handler->expected_pads); } PLAY_ITEMS_UNLOCK (uridecodebin); break; } case GST_MESSAGE_BUFFERING: { GstSourceHandler *handler; GST_DEBUG_OBJECT (uridecodebin, "Handle buffering message"); PLAY_ITEMS_LOCK (uridecodebin); /* Find the matching handler (if any) */ handler = find_source_handler_for_element (uridecodebin, msg->src); if (!handler) { GST_LOG_OBJECT (uridecodebin, "No handler for message, dropping it"); gst_message_unref (msg); msg = NULL; } else if (!uridecodebin->input_item->main_item || handler != uridecodebin->input_item->main_item->handler) { GST_LOG_OBJECT (uridecodebin, "Handler isn't active input item, storing message"); /* Store the message for a later time */ if (handler->pending_buffering_msg) gst_message_unref (handler->pending_buffering_msg); handler->pending_buffering_msg = msg; msg = NULL; } else { /* This is the active main input item, we can forward directly */ GST_DEBUG_OBJECT (uridecodebin, "Forwarding message for active input item"); } PLAY_ITEMS_UNLOCK (uridecodebin); break; } case GST_MESSAGE_ERROR: { const GstStructure *details = NULL; gst_message_parse_error_details (msg, &details); if (details && gst_structure_has_field (details, "redirect-location")) msg = gst_uri_decode_bin3_handle_redirection (uridecodebin, msg, details); break; } default: break; } if (msg) GST_BIN_CLASS (parent_class)->handle_message (bin, msg); } static gboolean gst_uri_decodebin3_send_event (GstElement * element, GstEvent * event) { GstURIDecodeBin3 *self = GST_URI_DECODE_BIN3 (element); if (GST_EVENT_IS_UPSTREAM (event) && self->decodebin) return gst_element_send_event (self->decodebin, event); return GST_ELEMENT_CLASS (parent_class)->send_event (element, event); }