/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2000,2001,2002,2003,2004,2005 Wim Taymans * 2007 Wim Taymans * * gsttee.c: Tee element, one in N out * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:element-tee * @see_also: #GstIdentity * * Split data to multiple pads. Branching the data flow is useful when e.g. * capturing a video where the video is shown on the screen and also encoded and * written to a file. Another example is playing music and hooking up a * visualisation module. * * One needs to use separate queue elements (or a multiqueue) in each branch to * provide separate threads for each branch. Otherwise a blocked dataflow in one * branch would stall the other branches. * * * Example launch line * |[ * gst-launch filesrc location=song.ogg ! decodebin2 ! tee name=t ! queue ! autoaudiosink t. ! queue ! audioconvert ! goom ! ffmpegcolorspace ! autovideosink * ]| Play a song.ogg from local dir and render visualisations using the goom * element. * */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include "gsttee.h" #include static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS_ANY); GST_DEBUG_CATEGORY_STATIC (gst_tee_debug); #define GST_CAT_DEFAULT gst_tee_debug #define GST_TYPE_TEE_PULL_MODE (gst_tee_pull_mode_get_type()) static GType gst_tee_pull_mode_get_type (void) { static GType type = 0; static const GEnumValue data[] = { {GST_TEE_PULL_MODE_NEVER, "Never activate in pull mode", "never"}, {GST_TEE_PULL_MODE_SINGLE, "Only one src pad can be active in pull mode", "single"}, {0, NULL, NULL}, }; if (!type) { type = g_enum_register_static ("GstTeePullMode", data); } return type; } /* lock to protect request pads from being removed while downstream */ #define GST_TEE_DYN_LOCK(tee) g_mutex_lock ((tee)->dyn_lock) #define GST_TEE_DYN_UNLOCK(tee) g_mutex_unlock ((tee)->dyn_lock) #define DEFAULT_PROP_NUM_SRC_PADS 0 #define DEFAULT_PROP_HAS_SINK_LOOP FALSE #define DEFAULT_PROP_HAS_CHAIN TRUE #define DEFAULT_PROP_SILENT TRUE #define DEFAULT_PROP_LAST_MESSAGE NULL #define DEFAULT_PULL_MODE GST_TEE_PULL_MODE_NEVER enum { PROP_0, PROP_NUM_SRC_PADS, PROP_HAS_SINK_LOOP, PROP_HAS_CHAIN, PROP_SILENT, PROP_LAST_MESSAGE, PROP_PULL_MODE, PROP_ALLOC_PAD, }; static GstStaticPadTemplate tee_src_template = GST_STATIC_PAD_TEMPLATE ("src%d", GST_PAD_SRC, GST_PAD_REQUEST, GST_STATIC_CAPS_ANY); #define _do_init(bla) \ GST_DEBUG_CATEGORY_INIT (gst_tee_debug, "tee", 0, "tee element"); GST_BOILERPLATE_FULL (GstTee, gst_tee, GstElement, GST_TYPE_ELEMENT, _do_init); /* structure and quark to keep track of which pads have been pushed */ static GQuark push_data; static GParamSpec *pspec_last_message = NULL; static GParamSpec *pspec_alloc_pad = NULL; typedef struct { gboolean pushed; GstFlowReturn result; gboolean removed; } PushData; static GstPad *gst_tee_request_new_pad (GstElement * element, GstPadTemplate * temp, const gchar * unused); static void gst_tee_release_pad (GstElement * element, GstPad * pad); static void gst_tee_finalize (GObject * object); static void gst_tee_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_tee_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static void gst_tee_dispose (GObject * object); static GstFlowReturn gst_tee_chain (GstPad * pad, GstBuffer * buffer); static GstFlowReturn gst_tee_chain_list (GstPad * pad, GstBufferList * list); static GstFlowReturn gst_tee_buffer_alloc (GstPad * pad, guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf); static gboolean gst_tee_sink_acceptcaps (GstPad * pad, GstCaps * caps); static gboolean gst_tee_sink_activate_push (GstPad * pad, gboolean active); static gboolean gst_tee_src_check_get_range (GstPad * pad); static gboolean gst_tee_src_activate_pull (GstPad * pad, gboolean active); static GstFlowReturn gst_tee_src_get_range (GstPad * pad, guint64 offset, guint length, GstBuffer ** buf); static void gst_tee_base_init (gpointer g_class) { GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class); gst_element_class_set_details_simple (gstelement_class, "Tee pipe fitting", "Generic", "1-to-N pipe fitting", "Erik Walthinsen , " "Wim Taymans "); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&sinktemplate)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&tee_src_template)); push_data = g_quark_from_static_string ("tee-push-data"); } static void gst_tee_dispose (GObject * object) { GList *item; restart: for (item = GST_ELEMENT_PADS (object); item; item = g_list_next (item)) { GstPad *pad = GST_PAD (item->data); if (GST_PAD_IS_SRC (pad)) { gst_element_release_request_pad (GST_ELEMENT (object), pad); goto restart; } } G_OBJECT_CLASS (parent_class)->dispose (object); } static void gst_tee_finalize (GObject * object) { GstTee *tee; tee = GST_TEE (object); g_free (tee->last_message); g_mutex_free (tee->dyn_lock); G_OBJECT_CLASS (parent_class)->finalize (object); } static void gst_tee_class_init (GstTeeClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = G_OBJECT_CLASS (klass); gstelement_class = GST_ELEMENT_CLASS (klass); gobject_class->finalize = gst_tee_finalize; gobject_class->set_property = gst_tee_set_property; gobject_class->get_property = gst_tee_get_property; gobject_class->dispose = gst_tee_dispose; g_object_class_install_property (gobject_class, PROP_NUM_SRC_PADS, g_param_spec_int ("num-src-pads", "Num Src Pads", "The number of source pads", 0, G_MAXINT, DEFAULT_PROP_NUM_SRC_PADS, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_HAS_SINK_LOOP, g_param_spec_boolean ("has-sink-loop", "Has Sink Loop", "If the element should spawn a thread (unimplemented and deprecated)", DEFAULT_PROP_HAS_SINK_LOOP, G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_HAS_CHAIN, g_param_spec_boolean ("has-chain", "Has Chain", "If the element can operate in push mode", DEFAULT_PROP_HAS_CHAIN, G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_SILENT, g_param_spec_boolean ("silent", "Silent", "Don't produce last_message events", DEFAULT_PROP_SILENT, G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); pspec_last_message = g_param_spec_string ("last-message", "Last Message", "The message describing current status", DEFAULT_PROP_LAST_MESSAGE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS); g_object_class_install_property (gobject_class, PROP_LAST_MESSAGE, pspec_last_message); g_object_class_install_property (gobject_class, PROP_PULL_MODE, g_param_spec_enum ("pull-mode", "Pull mode", "Behavior of tee in pull mode", GST_TYPE_TEE_PULL_MODE, DEFAULT_PULL_MODE, G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); pspec_alloc_pad = g_param_spec_object ("alloc-pad", "Allocation Src Pad", "The pad used for gst_pad_alloc_buffer", GST_TYPE_PAD, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS); g_object_class_install_property (gobject_class, PROP_ALLOC_PAD, pspec_alloc_pad); gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR (gst_tee_request_new_pad); gstelement_class->release_pad = GST_DEBUG_FUNCPTR (gst_tee_release_pad); } static void gst_tee_init (GstTee * tee, GstTeeClass * g_class) { tee->dyn_lock = g_mutex_new (); tee->sinkpad = gst_pad_new_from_static_template (&sinktemplate, "sink"); tee->sink_mode = GST_ACTIVATE_NONE; gst_pad_set_setcaps_function (tee->sinkpad, GST_DEBUG_FUNCPTR (gst_pad_proxy_setcaps)); gst_pad_set_getcaps_function (tee->sinkpad, GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps)); gst_pad_set_acceptcaps_function (tee->sinkpad, GST_DEBUG_FUNCPTR (gst_tee_sink_acceptcaps)); gst_pad_set_bufferalloc_function (tee->sinkpad, GST_DEBUG_FUNCPTR (gst_tee_buffer_alloc)); gst_pad_set_activatepush_function (tee->sinkpad, GST_DEBUG_FUNCPTR (gst_tee_sink_activate_push)); gst_pad_set_chain_function (tee->sinkpad, GST_DEBUG_FUNCPTR (gst_tee_chain)); gst_pad_set_chain_list_function (tee->sinkpad, GST_DEBUG_FUNCPTR (gst_tee_chain_list)); gst_element_add_pad (GST_ELEMENT (tee), tee->sinkpad); tee->last_message = NULL; } static void gst_tee_notify_alloc_pad (GstTee * tee) { #if !GLIB_CHECK_VERSION(2,26,0) g_object_notify ((GObject *) tee, "alloc-pad"); #else g_object_notify_by_pspec ((GObject *) tee, pspec_alloc_pad); #endif } static GstPad * gst_tee_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * unused) { gchar *name; GstPad *srcpad; GstTee *tee; GstActivateMode mode; gboolean res; PushData *data; tee = GST_TEE (element); GST_DEBUG_OBJECT (tee, "requesting pad"); GST_OBJECT_LOCK (tee); name = g_strdup_printf ("src%d", tee->pad_counter++); srcpad = gst_pad_new_from_template (templ, name); g_free (name); mode = tee->sink_mode; /* install the data, we automatically free it when the pad is disposed because * of _release_pad or when the element goes away. */ data = g_new0 (PushData, 1); data->pushed = FALSE; data->result = GST_FLOW_NOT_LINKED; data->removed = FALSE; g_object_set_qdata_full (G_OBJECT (srcpad), push_data, data, g_free); GST_OBJECT_UNLOCK (tee); switch (mode) { case GST_ACTIVATE_PULL: /* we already have a src pad in pull mode, and our pull mode can only be SINGLE, so fall through to activate this new pad in push mode */ case GST_ACTIVATE_PUSH: res = gst_pad_activate_push (srcpad, TRUE); break; default: res = TRUE; break; } if (!res) goto activate_failed; gst_pad_set_setcaps_function (srcpad, GST_DEBUG_FUNCPTR (gst_pad_proxy_setcaps)); gst_pad_set_getcaps_function (srcpad, GST_DEBUG_FUNCPTR (gst_pad_proxy_getcaps)); gst_pad_set_activatepull_function (srcpad, GST_DEBUG_FUNCPTR (gst_tee_src_activate_pull)); gst_pad_set_checkgetrange_function (srcpad, GST_DEBUG_FUNCPTR (gst_tee_src_check_get_range)); gst_pad_set_getrange_function (srcpad, GST_DEBUG_FUNCPTR (gst_tee_src_get_range)); gst_element_add_pad (GST_ELEMENT_CAST (tee), srcpad); return srcpad; /* ERRORS */ activate_failed: { gboolean changed = FALSE; GST_OBJECT_LOCK (tee); GST_DEBUG_OBJECT (tee, "warning failed to activate request pad"); if (tee->allocpad == srcpad) { tee->allocpad = NULL; changed = TRUE; } GST_OBJECT_UNLOCK (tee); gst_object_unref (srcpad); if (changed) { gst_tee_notify_alloc_pad (tee); } return NULL; } } static void gst_tee_release_pad (GstElement * element, GstPad * pad) { GstTee *tee; PushData *data; gboolean changed = FALSE; tee = GST_TEE (element); GST_DEBUG_OBJECT (tee, "releasing pad"); /* wait for pending pad_alloc to finish */ GST_TEE_DYN_LOCK (tee); data = g_object_get_qdata (G_OBJECT (pad), push_data); GST_OBJECT_LOCK (tee); /* mark the pad as removed so that future pad_alloc fails with NOT_LINKED. */ data->removed = TRUE; if (tee->allocpad == pad) { tee->allocpad = NULL; changed = TRUE; } GST_OBJECT_UNLOCK (tee); gst_pad_set_active (pad, FALSE); gst_element_remove_pad (GST_ELEMENT_CAST (tee), pad); GST_TEE_DYN_UNLOCK (tee); if (changed) { gst_tee_notify_alloc_pad (tee); } } static void gst_tee_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstTee *tee = GST_TEE (object); GST_OBJECT_LOCK (tee); switch (prop_id) { case PROP_HAS_SINK_LOOP: tee->has_sink_loop = g_value_get_boolean (value); if (tee->has_sink_loop) { g_warning ("tee will never implement has-sink-loop==TRUE"); } break; case PROP_HAS_CHAIN: tee->has_chain = g_value_get_boolean (value); break; case PROP_SILENT: tee->silent = g_value_get_boolean (value); break; case PROP_PULL_MODE: tee->pull_mode = g_value_get_enum (value); break; case PROP_ALLOC_PAD: { GstPad *pad = g_value_get_object (value); GST_OBJECT_LOCK (pad); if (GST_OBJECT_PARENT (pad) == GST_OBJECT_CAST (object)) tee->allocpad = pad; else GST_WARNING_OBJECT (object, "Tried to set alloc pad %s which" " is not my pad", GST_OBJECT_NAME (pad)); GST_OBJECT_UNLOCK (pad); break; } default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } GST_OBJECT_UNLOCK (tee); } static void gst_tee_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstTee *tee = GST_TEE (object); GST_OBJECT_LOCK (tee); switch (prop_id) { case PROP_NUM_SRC_PADS: g_value_set_int (value, GST_ELEMENT (tee)->numsrcpads); break; case PROP_HAS_SINK_LOOP: g_value_set_boolean (value, tee->has_sink_loop); break; case PROP_HAS_CHAIN: g_value_set_boolean (value, tee->has_chain); break; case PROP_SILENT: g_value_set_boolean (value, tee->silent); break; case PROP_LAST_MESSAGE: g_value_set_string (value, tee->last_message); break; case PROP_PULL_MODE: g_value_set_enum (value, tee->pull_mode); break; case PROP_ALLOC_PAD: g_value_set_object (value, tee->allocpad); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } GST_OBJECT_UNLOCK (tee); } /* we have no previous source pad we can use to proxy the pad alloc. Loop over * the source pads, try to alloc a buffer on each one of them. Keep a reference * to the first pad that succeeds, we will be using it to alloc more buffers * later. must be called with the OBJECT_LOCK on tee. */ static GstFlowReturn gst_tee_find_buffer_alloc (GstTee * tee, guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf) { GstFlowReturn res; GList *pads; guint32 cookie; res = GST_FLOW_NOT_LINKED; retry: pads = GST_ELEMENT_CAST (tee)->srcpads; cookie = GST_ELEMENT_CAST (tee)->pads_cookie; while (pads) { GstPad *pad; PushData *data; pad = GST_PAD_CAST (pads->data); gst_object_ref (pad); GST_DEBUG_OBJECT (tee, "try alloc on pad %s:%s", GST_DEBUG_PAD_NAME (pad)); GST_OBJECT_UNLOCK (tee); GST_TEE_DYN_LOCK (tee); data = g_object_get_qdata ((GObject *) pad, push_data); if (!data->removed) res = gst_pad_alloc_buffer (pad, offset, size, caps, buf); else res = GST_FLOW_NOT_LINKED; GST_TEE_DYN_UNLOCK (tee); GST_DEBUG_OBJECT (tee, "got return value %d", res); gst_object_unref (pad); GST_OBJECT_LOCK (tee); if (GST_ELEMENT_CAST (tee)->pads_cookie != cookie) { GST_DEBUG_OBJECT (tee, "pad list changed, restart"); /* pad list changed, restart. If the pad alloc function returned OK we * need to unref the buffer */ if (res == GST_FLOW_OK) gst_buffer_unref (*buf); *buf = NULL; goto retry; } if (!data->removed && res == GST_FLOW_OK) { GST_DEBUG_OBJECT (tee, "we have a buffer on pad %s:%s", GST_DEBUG_PAD_NAME (pad)); /* we have a buffer, keep the pad for later and exit the loop. */ tee->allocpad = pad; GST_OBJECT_UNLOCK (tee); gst_tee_notify_alloc_pad (tee); GST_OBJECT_LOCK (tee); break; } /* no valid buffer, try another pad */ pads = g_list_next (pads); } return res; } static GstFlowReturn gst_tee_buffer_alloc (GstPad * pad, guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf) { GstTee *tee; GstFlowReturn res; GstPad *allocpad; tee = GST_TEE_CAST (gst_pad_get_parent (pad)); if (G_UNLIKELY (tee == NULL)) return GST_FLOW_WRONG_STATE; res = GST_FLOW_NOT_LINKED; GST_OBJECT_LOCK (tee); if ((allocpad = tee->allocpad)) { PushData *data; /* if we had a previous pad we used for allocating a buffer, continue using * it. */ GST_DEBUG_OBJECT (tee, "using pad %s:%s for alloc", GST_DEBUG_PAD_NAME (allocpad)); gst_object_ref (allocpad); GST_OBJECT_UNLOCK (tee); GST_TEE_DYN_LOCK (tee); data = g_object_get_qdata ((GObject *) allocpad, push_data); if (!data->removed) res = gst_pad_alloc_buffer (allocpad, offset, size, caps, buf); else res = GST_FLOW_NOT_LINKED; GST_TEE_DYN_UNLOCK (tee); gst_object_unref (allocpad); GST_OBJECT_LOCK (tee); } /* either we failed to alloc on the previous pad or we did not have a * previous pad. */ if (res == GST_FLOW_NOT_LINKED) { /* find a new pad to alloc a buffer on */ GST_DEBUG_OBJECT (tee, "finding pad for alloc"); res = gst_tee_find_buffer_alloc (tee, offset, size, caps, buf); } GST_OBJECT_UNLOCK (tee); gst_object_unref (tee); return res; } /* on the sink we accept caps that are acceptable to all srcpads */ static gboolean gst_tee_sink_acceptcaps (GstPad * pad, GstCaps * caps) { GstTee *tee; gboolean res, done; GstIterator *it; tee = GST_TEE_CAST (GST_PAD_PARENT (pad)); it = gst_element_iterate_src_pads (GST_ELEMENT_CAST (tee)); res = TRUE; done = FALSE; while (!done && res) { gpointer item; switch (gst_iterator_next (it, &item)) { case GST_ITERATOR_OK: res &= gst_pad_peer_accept_caps (GST_PAD_CAST (item), caps); gst_object_unref (item); break; case GST_ITERATOR_RESYNC: res = TRUE; gst_iterator_resync (it); break; case GST_ITERATOR_ERROR: res = FALSE; done = TRUE; break; case GST_ITERATOR_DONE: done = TRUE; break; } } gst_iterator_free (it); return res; } static void gst_tee_do_message (GstTee * tee, GstPad * pad, gpointer data, gboolean is_list) { GST_OBJECT_LOCK (tee); g_free (tee->last_message); if (is_list) { tee->last_message = g_strdup_printf ("chain-list ******* (%s:%s)t %p", GST_DEBUG_PAD_NAME (pad), data); } else { tee->last_message = g_strdup_printf ("chain ******* (%s:%s)t (%d bytes, %" G_GUINT64_FORMAT ") %p", GST_DEBUG_PAD_NAME (pad), GST_BUFFER_SIZE (data), GST_BUFFER_TIMESTAMP (data), data); } GST_OBJECT_UNLOCK (tee); #if !GLIB_CHECK_VERSION(2,26,0) g_object_notify ((GObject *) tee, "last-message"); #else g_object_notify_by_pspec ((GObject *) tee, pspec_last_message); #endif } static GstFlowReturn gst_tee_do_push (GstTee * tee, GstPad * pad, gpointer data, gboolean is_list) { GstFlowReturn res; /* Push */ if (pad == tee->pull_pad) { /* don't push on the pad we're pulling from */ res = GST_FLOW_OK; } else if (is_list) { res = gst_pad_push_list (pad, gst_buffer_list_ref (GST_BUFFER_LIST_CAST (data))); } else { res = gst_pad_push (pad, gst_buffer_ref (GST_BUFFER_CAST (data))); } return res; } static void clear_pads (GstPad * pad, GstTee * tee) { PushData *data; data = g_object_get_qdata ((GObject *) pad, push_data); /* the data must be there or we have a screwed up internal state */ g_assert (data != NULL); data->pushed = FALSE; data->result = GST_FLOW_NOT_LINKED; } static GstFlowReturn gst_tee_handle_data (GstTee * tee, gpointer data, gboolean is_list) { GList *pads; guint32 cookie; GstFlowReturn ret, cret; if (G_UNLIKELY (!tee->silent)) gst_tee_do_message (tee, tee->sinkpad, data, is_list); GST_OBJECT_LOCK (tee); pads = GST_ELEMENT_CAST (tee)->srcpads; /* special case for zero pads */ if (G_UNLIKELY (!pads)) goto no_pads; /* special case for just one pad that avoids reffing the buffer */ if (!pads->next) { GstPad *pad = GST_PAD_CAST (pads->data); GST_OBJECT_UNLOCK (tee); if (pad == tee->pull_pad) { ret = GST_FLOW_OK; } else if (is_list) { ret = gst_pad_push_list (pad, GST_BUFFER_LIST_CAST (data)); } else { ret = gst_pad_push (pad, GST_BUFFER_CAST (data)); } return ret; } /* mark all pads as 'not pushed on yet' */ g_list_foreach (pads, (GFunc) clear_pads, tee); restart: cret = GST_FLOW_NOT_LINKED; pads = GST_ELEMENT_CAST (tee)->srcpads; cookie = GST_ELEMENT_CAST (tee)->pads_cookie; while (pads) { GstPad *pad; PushData *pdata; pad = GST_PAD_CAST (pads->data); /* get the private data, something is really wrong with the internal state * when it is not there */ pdata = g_object_get_qdata ((GObject *) pad, push_data); g_assert (pdata != NULL); if (G_LIKELY (!pdata->pushed)) { /* not yet pushed, release lock and start pushing */ gst_object_ref (pad); GST_OBJECT_UNLOCK (tee); GST_LOG_OBJECT (tee, "Starting to push %s %p", is_list ? "list" : "buffer", data); ret = gst_tee_do_push (tee, pad, data, is_list); GST_LOG_OBJECT (tee, "Pushing item %p yielded result %s", data, gst_flow_get_name (ret)); GST_OBJECT_LOCK (tee); /* keep track of which pad we pushed and the result value. We need to do * this before we release the refcount on the pad, the PushData is * destroyed when the last ref of the pad goes away. */ pdata->pushed = TRUE; pdata->result = ret; gst_object_unref (pad); } else { /* already pushed, use previous return value */ ret = pdata->result; GST_LOG_OBJECT (tee, "pad already pushed with %s", gst_flow_get_name (ret)); } /* before we go combining the return value, check if the pad list is still * the same. It could be possible that the pad we just pushed was removed * and the return value it not valid anymore */ if (G_UNLIKELY (GST_ELEMENT_CAST (tee)->pads_cookie != cookie)) { GST_LOG_OBJECT (tee, "pad list changed"); /* the list of pads changed, restart iteration. Pads that we already * pushed on and are still in the new list, will not be pushed on * again. */ goto restart; } /* stop pushing more buffers when we have a fatal error */ if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)) goto error; /* keep all other return values, overwriting the previous one. */ if (G_LIKELY (ret != GST_FLOW_NOT_LINKED)) { GST_LOG_OBJECT (tee, "Replacing ret val %d with %d", cret, ret); cret = ret; } pads = g_list_next (pads); } GST_OBJECT_UNLOCK (tee); gst_mini_object_unref (GST_MINI_OBJECT_CAST (data)); /* no need to unset gvalue */ return cret; /* ERRORS */ no_pads: { GST_DEBUG_OBJECT (tee, "there are no pads, return not-linked"); ret = GST_FLOW_NOT_LINKED; goto error; } error: { GST_DEBUG_OBJECT (tee, "received error %s", gst_flow_get_name (ret)); GST_OBJECT_UNLOCK (tee); gst_mini_object_unref (GST_MINI_OBJECT_CAST (data)); return ret; } } static GstFlowReturn gst_tee_chain (GstPad * pad, GstBuffer * buffer) { GstFlowReturn res; GstTee *tee; tee = GST_TEE_CAST (GST_OBJECT_PARENT (pad)); GST_DEBUG_OBJECT (tee, "received buffer %p", buffer); res = gst_tee_handle_data (tee, buffer, FALSE); GST_DEBUG_OBJECT (tee, "handled buffer %s", gst_flow_get_name (res)); return res; } static GstFlowReturn gst_tee_chain_list (GstPad * pad, GstBufferList * list) { GstFlowReturn res; GstTee *tee; tee = GST_TEE_CAST (gst_pad_get_parent (pad)); GST_DEBUG_OBJECT (tee, "received list %p", list); res = gst_tee_handle_data (tee, list, TRUE); GST_DEBUG_OBJECT (tee, "handled list %s", gst_flow_get_name (res)); gst_object_unref (tee); return res; } static gboolean gst_tee_sink_activate_push (GstPad * pad, gboolean active) { GstTee *tee; tee = GST_TEE (GST_OBJECT_PARENT (pad)); GST_OBJECT_LOCK (tee); tee->sink_mode = active && GST_ACTIVATE_PUSH; if (active && !tee->has_chain) goto no_chain; GST_OBJECT_UNLOCK (tee); return TRUE; /* ERRORS */ no_chain: { GST_OBJECT_UNLOCK (tee); GST_INFO_OBJECT (tee, "Tee cannot operate in push mode with has-chain==FALSE"); return FALSE; } } static gboolean gst_tee_src_activate_pull (GstPad * pad, gboolean active) { GstTee *tee; gboolean res; GstPad *sinkpad; tee = GST_TEE (gst_pad_get_parent (pad)); GST_OBJECT_LOCK (tee); if (tee->pull_mode == GST_TEE_PULL_MODE_NEVER) goto cannot_pull; if (tee->pull_mode == GST_TEE_PULL_MODE_SINGLE && active && tee->pull_pad) goto cannot_pull_multiple_srcs; sinkpad = gst_object_ref (tee->sinkpad); GST_OBJECT_UNLOCK (tee); res = gst_pad_activate_pull (sinkpad, active); gst_object_unref (sinkpad); if (!res) goto sink_activate_failed; GST_OBJECT_LOCK (tee); if (active) { if (tee->pull_mode == GST_TEE_PULL_MODE_SINGLE) tee->pull_pad = pad; } else { if (pad == tee->pull_pad) tee->pull_pad = NULL; } tee->sink_mode = active && GST_ACTIVATE_PULL; GST_OBJECT_UNLOCK (tee); gst_object_unref (tee); return res; /* ERRORS */ cannot_pull: { GST_OBJECT_UNLOCK (tee); GST_INFO_OBJECT (tee, "Cannot activate in pull mode, pull-mode " "set to NEVER"); gst_object_unref (tee); return FALSE; } cannot_pull_multiple_srcs: { GST_OBJECT_UNLOCK (tee); GST_INFO_OBJECT (tee, "Cannot activate multiple src pads in pull mode, " "pull-mode set to SINGLE"); gst_object_unref (tee); return FALSE; } sink_activate_failed: { GST_INFO_OBJECT (tee, "Failed to %sactivate sink pad in pull mode", active ? "" : "de"); gst_object_unref (tee); return FALSE; } } static gboolean gst_tee_src_check_get_range (GstPad * pad) { GstTee *tee; gboolean res; GstPad *sinkpad; tee = GST_TEE (gst_pad_get_parent (pad)); GST_OBJECT_LOCK (tee); if (tee->pull_mode == GST_TEE_PULL_MODE_NEVER) goto cannot_pull; if (tee->pull_mode == GST_TEE_PULL_MODE_SINGLE && tee->pull_pad) goto cannot_pull_multiple_srcs; sinkpad = gst_object_ref (tee->sinkpad); GST_OBJECT_UNLOCK (tee); res = gst_pad_check_pull_range (sinkpad); gst_object_unref (sinkpad); gst_object_unref (tee); return res; /* ERRORS */ cannot_pull: { GST_OBJECT_UNLOCK (tee); GST_INFO_OBJECT (tee, "Cannot activate in pull mode, pull-mode " "set to NEVER"); gst_object_unref (tee); return FALSE; } cannot_pull_multiple_srcs: { GST_OBJECT_UNLOCK (tee); GST_INFO_OBJECT (tee, "Cannot activate multiple src pads in pull mode, " "pull-mode set to SINGLE"); gst_object_unref (tee); return FALSE; } } static void gst_tee_push_eos (GstPad * pad, GstTee * tee) { if (pad != tee->pull_pad) gst_pad_push_event (pad, gst_event_new_eos ()); gst_object_unref (pad); } static void gst_tee_pull_eos (GstTee * tee) { GstIterator *iter; iter = gst_element_iterate_src_pads (GST_ELEMENT (tee)); gst_iterator_foreach (iter, (GFunc) gst_tee_push_eos, tee); gst_iterator_free (iter); } static GstFlowReturn gst_tee_src_get_range (GstPad * pad, guint64 offset, guint length, GstBuffer ** buf) { GstTee *tee; GstFlowReturn ret; tee = GST_TEE (gst_pad_get_parent (pad)); ret = gst_pad_pull_range (tee->sinkpad, offset, length, buf); if (ret == GST_FLOW_OK) ret = gst_tee_handle_data (tee, gst_buffer_ref (*buf), FALSE); else if (ret == GST_FLOW_UNEXPECTED) gst_tee_pull_eos (tee); gst_object_unref (tee); return ret; }