diff options
Diffstat (limited to 'gst/oldcore/gstaggregator.c')
-rw-r--r-- | gst/oldcore/gstaggregator.c | 379 |
1 files changed, 379 insertions, 0 deletions
diff --git a/gst/oldcore/gstaggregator.c b/gst/oldcore/gstaggregator.c new file mode 100644 index 00000000..ddd806cf --- /dev/null +++ b/gst/oldcore/gstaggregator.c @@ -0,0 +1,379 @@ +/* GStreamer + * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu> + * 2000 Wim Taymans <wim.taymans@chello.be> + * + * gstaggregator.c: Aggregator element, N in 1 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. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include "gstaggregator.h" + +static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src", + GST_PAD_SRC, + GST_PAD_ALWAYS, + GST_STATIC_CAPS_ANY); + +GST_DEBUG_CATEGORY_STATIC (gst_aggregator_debug); +#define GST_CAT_DEFAULT gst_aggregator_debug + +GstElementDetails gst_aggregator_details = +GST_ELEMENT_DETAILS ("Aggregator pipe fitting", + "Generic", + "N-to-1 pipe fitting", + "Wim Taymans <wim.taymans@chello.be>"); + +/* Aggregator signals and args */ +enum +{ + /* FILL ME */ + LAST_SIGNAL +}; + +enum +{ + ARG_0, + ARG_NUM_PADS, + ARG_SILENT, + ARG_SCHED, + ARG_LAST_MESSAGE + /* FILL ME */ +}; + +GstStaticPadTemplate aggregator_src_template = +GST_STATIC_PAD_TEMPLATE ("sink%d", + GST_PAD_SINK, + GST_PAD_REQUEST, + GST_STATIC_CAPS_ANY); + +#define GST_TYPE_AGGREGATOR_SCHED (gst_aggregator_sched_get_type()) +static GType +gst_aggregator_sched_get_type (void) +{ + static GType aggregator_sched_type = 0; + static GEnumValue aggregator_sched[] = { + {AGGREGATOR_LOOP, "1", "Loop Based"}, + {AGGREGATOR_LOOP_SELECT, "3", "Loop Based Select"}, + {AGGREGATOR_CHAIN, "4", "Chain Based"}, + {0, NULL, NULL}, + }; + + if (!aggregator_sched_type) { + aggregator_sched_type = + g_enum_register_static ("GstAggregatorSched", aggregator_sched); + } + return aggregator_sched_type; +} + +#define AGGREGATOR_IS_LOOP_BASED(ag) ((ag)->sched != AGGREGATOR_CHAIN) + +static GstPad *gst_aggregator_request_new_pad (GstElement * element, + GstPadTemplate * temp, const gchar * unused); +static void gst_aggregator_update_functions (GstAggregator * aggregator); + +static void gst_aggregator_finalize (GObject * object); +static void gst_aggregator_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec); +static void gst_aggregator_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec); + +static void gst_aggregator_chain (GstPad * pad, GstData * _data); +static void gst_aggregator_loop (GstElement * element); + +#define _do_init(bla) \ + GST_DEBUG_CATEGORY_INIT (gst_aggregator_debug, "aggregator", 0, "aggregator element"); + +GST_BOILERPLATE_FULL (GstAggregator, gst_aggregator, GstElement, + GST_TYPE_ELEMENT, _do_init); + +static void +gst_aggregator_base_init (gpointer g_class) +{ + GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class); + + gst_element_class_add_pad_template (gstelement_class, + gst_static_pad_template_get (&aggregator_src_template)); + gst_element_class_add_pad_template (gstelement_class, + gst_static_pad_template_get (&srctemplate)); + gst_element_class_set_details (gstelement_class, &gst_aggregator_details); +} + +static void +gst_aggregator_finalize (GObject * object) +{ + GstAggregator *aggregator; + + aggregator = GST_AGGREGATOR (object); + + g_list_free (aggregator->sinkpads); + g_free (aggregator->last_message); + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +static void +gst_aggregator_class_init (GstAggregatorClass * klass) +{ + GObjectClass *gobject_class; + GstElementClass *gstelement_class; + + gobject_class = (GObjectClass *) klass; + gstelement_class = (GstElementClass *) klass; + + gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_aggregator_set_property); + gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_aggregator_get_property); + + g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NUM_PADS, + g_param_spec_int ("num_pads", "Num pads", "The number of source pads", + 0, G_MAXINT, 0, G_PARAM_READABLE)); + g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SILENT, + g_param_spec_boolean ("silent", "Silent", "Don't produce messages", + FALSE, G_PARAM_READWRITE)); + g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SCHED, + g_param_spec_enum ("sched", "Scheduling", + "The type of scheduling this element should use", + GST_TYPE_AGGREGATOR_SCHED, AGGREGATOR_CHAIN, G_PARAM_READWRITE)); + g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LAST_MESSAGE, + g_param_spec_string ("last_message", "Last message", + "The current state of the element", NULL, G_PARAM_READABLE)); + + gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_aggregator_finalize); + + gstelement_class->request_new_pad = + GST_DEBUG_FUNCPTR (gst_aggregator_request_new_pad); +} + +static void +gst_aggregator_init (GstAggregator * aggregator) +{ + aggregator->srcpad = + gst_pad_new_from_template (gst_static_pad_template_get (&srctemplate), + "src"); + gst_pad_set_getcaps_function (aggregator->srcpad, gst_pad_proxy_getcaps); + gst_element_add_pad (GST_ELEMENT (aggregator), aggregator->srcpad); + + aggregator->numsinkpads = 0; + aggregator->sinkpads = NULL; + aggregator->silent = FALSE; + aggregator->sched = AGGREGATOR_LOOP; + aggregator->last_message = NULL; + + gst_aggregator_update_functions (aggregator); +} + +static GstPad * +gst_aggregator_request_new_pad (GstElement * element, GstPadTemplate * templ, + const gchar * unused) +{ + gchar *name; + GstPad *sinkpad; + GstAggregator *aggregator; + + g_return_val_if_fail (GST_IS_AGGREGATOR (element), NULL); + + if (templ->direction != GST_PAD_SINK) { + g_warning ("gstaggregator: request new pad that is not a sink pad\n"); + return NULL; + } + + aggregator = GST_AGGREGATOR (element); + + name = g_strdup_printf ("sink%d", aggregator->numsinkpads); + + sinkpad = gst_pad_new_from_template (templ, name); + g_free (name); + + if (!AGGREGATOR_IS_LOOP_BASED (aggregator)) { + gst_pad_set_chain_function (sinkpad, gst_aggregator_chain); + } + gst_pad_set_getcaps_function (sinkpad, gst_pad_proxy_getcaps); + gst_element_add_pad (GST_ELEMENT (aggregator), sinkpad); + + aggregator->sinkpads = g_list_prepend (aggregator->sinkpads, sinkpad); + aggregator->numsinkpads++; + + return sinkpad; +} + +static void +gst_aggregator_update_functions (GstAggregator * aggregator) +{ + GList *pads; + + if (AGGREGATOR_IS_LOOP_BASED (aggregator)) { + gst_element_set_loop_function (GST_ELEMENT (aggregator), + GST_DEBUG_FUNCPTR (gst_aggregator_loop)); + } else { + gst_element_set_loop_function (GST_ELEMENT (aggregator), NULL); + } + + pads = aggregator->sinkpads; + while (pads) { + GstPad *pad = GST_PAD (pads->data); + + if (AGGREGATOR_IS_LOOP_BASED (aggregator)) { + gst_pad_set_get_function (pad, NULL); + } else { + gst_element_set_loop_function (GST_ELEMENT (aggregator), NULL); + } + pads = g_list_next (pads); + } +} + +static void +gst_aggregator_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec) +{ + GstAggregator *aggregator; + + /* it's not null if we got it, but it might not be ours */ + g_return_if_fail (GST_IS_AGGREGATOR (object)); + + aggregator = GST_AGGREGATOR (object); + + switch (prop_id) { + case ARG_SILENT: + aggregator->silent = g_value_get_boolean (value); + break; + case ARG_SCHED: + aggregator->sched = g_value_get_enum (value); + gst_aggregator_update_functions (aggregator); + break; + default: + break; + } +} + +static void +gst_aggregator_get_property (GObject * object, guint prop_id, GValue * value, + GParamSpec * pspec) +{ + GstAggregator *aggregator; + + /* it's not null if we got it, but it might not be ours */ + g_return_if_fail (GST_IS_AGGREGATOR (object)); + + aggregator = GST_AGGREGATOR (object); + + switch (prop_id) { + case ARG_NUM_PADS: + g_value_set_int (value, aggregator->numsinkpads); + break; + case ARG_SILENT: + g_value_set_boolean (value, aggregator->silent); + break; + case ARG_SCHED: + g_value_set_enum (value, aggregator->sched); + break; + case ARG_LAST_MESSAGE: + g_value_set_string (value, aggregator->last_message); + break; + default: + break; + } +} + +static void +gst_aggregator_push (GstAggregator * aggregator, GstPad * pad, GstBuffer * buf, + guchar * debug) +{ + if (!aggregator->silent) { + g_free (aggregator->last_message); + + aggregator->last_message = + g_strdup_printf ("%10.10s ******* (%s:%s)a (%d bytes, %" + G_GUINT64_FORMAT ")", debug, GST_DEBUG_PAD_NAME (pad), + GST_BUFFER_SIZE (buf), GST_BUFFER_TIMESTAMP (buf)); + + g_object_notify (G_OBJECT (aggregator), "last_message"); + } + + gst_pad_push (aggregator->srcpad, GST_DATA (buf)); +} + +static void +gst_aggregator_loop (GstElement * element) +{ + GstAggregator *aggregator; + GstBuffer *buf; + guchar *debug; + + aggregator = GST_AGGREGATOR (element); + + if (aggregator->sched == AGGREGATOR_LOOP) { + GList *pads = aggregator->sinkpads; + + /* we'll loop over all pads and try to pull from all + * active ones */ + while (pads) { + GstPad *pad = GST_PAD (pads->data); + + pads = g_list_next (pads); + + /* we need to check is the pad is usable. IS_USABLE will check + * if the pad is linked, if it is enabled (the element is + * playing and the app didn't gst_pad_set_enabled (pad, FALSE)) + * and that the peer pad is also enabled. + */ + if (GST_PAD_IS_USABLE (pad)) { + buf = GST_BUFFER (gst_pad_pull (pad)); + debug = "loop"; + + /* then push it forward */ + gst_aggregator_push (aggregator, pad, buf, debug); + } + } + } else { + if (aggregator->sched == AGGREGATOR_LOOP_SELECT) { + GstPad *pad; + + debug = "loop_select"; + + buf = GST_BUFFER (gst_pad_collectv (&pad, aggregator->sinkpads)); + + gst_aggregator_push (aggregator, pad, buf, debug); + } else { + g_assert_not_reached (); + } + } +} + +/** + * gst_aggregator_chain: + * @pad: the pad to follow + * @buf: the buffer to pass + * + * Chain a buffer on a pad. + */ +static void +gst_aggregator_chain (GstPad * pad, GstData * _data) +{ + GstBuffer *buf = GST_BUFFER (_data); + GstAggregator *aggregator; + + g_return_if_fail (pad != NULL); + g_return_if_fail (GST_IS_PAD (pad)); + g_return_if_fail (buf != NULL); + + aggregator = GST_AGGREGATOR (gst_pad_get_parent (pad)); +/* gst_trace_add_entry (NULL, 0, buf, "aggregator buffer");*/ + + gst_aggregator_push (aggregator, pad, buf, "chain"); +} |