/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu> * 2000 Wim Taymans <wtay@chello.be> * * gstshaper.c: * * 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. */ #include <stdlib.h> #ifdef HAVE_CONFIG_H # include "config.h" #endif #include "gstshaper.h" GST_DEBUG_CATEGORY_STATIC (gst_shaper_debug); #define GST_CAT_DEFAULT gst_shaper_debug GstElementDetails gst_shaper_details = GST_ELEMENT_DETAILS ("Shaper", "Generic", "Synchronizes streams on different pads", "Wim Taymans <wim.taymans@chello.be>"); /* Shaper signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0, ARG_POLICY, ARG_SILENT, ARG_LAST_MESSAGE }; typedef struct { GstPad *sinkpad; GstPad *srcpad; GstBuffer *buffer; } GstShaperConnection; GstStaticPadTemplate shaper_src_template = GST_STATIC_PAD_TEMPLATE ("src%d", GST_PAD_SRC, GST_PAD_SOMETIMES, GST_STATIC_CAPS_ANY); GstStaticPadTemplate shaper_sink_template = GST_STATIC_PAD_TEMPLATE ("sink%d", GST_PAD_SINK, GST_PAD_REQUEST, GST_STATIC_CAPS_ANY); #define GST_TYPE_SHAPER_POLICY (gst_shaper_policy_get_type()) static GType gst_shaper_policy_get_type (void) { static GType shaper_policy_type = 0; static GEnumValue shaper_policy[] = { {SHAPER_POLICY_TIMESTAMPS, "1", "sync on timestamps"}, {SHAPER_POLICY_BUFFERSIZE, "2", "sync on buffer size"}, {0, NULL, NULL}, }; if (!shaper_policy_type) { shaper_policy_type = g_enum_register_static ("GstShaperPolicy", shaper_policy); } return shaper_policy_type; } #define _do_init(bla) \ GST_DEBUG_CATEGORY_INIT (gst_shaper_debug, "shaper", 0, "shaper element"); GST_BOILERPLATE_FULL (GstShaper, gst_shaper, GstElement, GST_TYPE_ELEMENT, _do_init); static void gst_shaper_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_shaper_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static GstPad *gst_shaper_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * unused); static void gst_shaper_loop (GstElement * element); static void gst_shaper_base_init (gpointer g_class) { GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class); gst_element_class_set_details (gstelement_class, &gst_shaper_details); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&shaper_src_template)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&shaper_sink_template)); } static void gst_shaper_class_init (GstShaperClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_shaper_set_property); gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_shaper_get_property); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_POLICY, g_param_spec_enum ("policy", "Policy", "Shaper policy", GST_TYPE_SHAPER_POLICY, SHAPER_POLICY_TIMESTAMPS, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SILENT, g_param_spec_boolean ("silent", "silent", "silent", FALSE, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LAST_MESSAGE, g_param_spec_string ("last-message", "last-message", "last-message", NULL, G_PARAM_READABLE)); gstelement_class->request_new_pad = GST_DEBUG_FUNCPTR (gst_shaper_request_new_pad); } static GstCaps * gst_shaper_getcaps (GstPad * pad) { GstPad *otherpad; GstShaperConnection *connection; connection = gst_pad_get_element_private (pad); otherpad = (pad == connection->srcpad ? connection->sinkpad : connection->srcpad); if (GST_PAD_PEER (otherpad)) { return gst_pad_get_caps (GST_PAD_PEER (otherpad)); } else { return gst_caps_new_any (); } } static GList * gst_shaper_get_internal_link (GstPad * pad) { GList *res = NULL; GstShaperConnection *connection; GstPad *otherpad; connection = gst_pad_get_element_private (pad); otherpad = (pad == connection->srcpad ? connection->sinkpad : connection->srcpad); res = g_list_prepend (res, otherpad); return res; } static GstPadLinkReturn gst_shaper_link (GstPad * pad, const GstCaps * caps) { GstPad *otherpad; GstShaperConnection *connection; connection = gst_pad_get_element_private (pad); otherpad = (pad == connection->srcpad ? connection->sinkpad : connection->srcpad); return gst_pad_try_set_caps (otherpad, caps); } static GstShaperConnection * gst_shaper_create_connection (GstShaper * shaper) { GstShaperConnection *connection; gchar *padname; shaper->nconnections++; connection = g_new0 (GstShaperConnection, 1); padname = g_strdup_printf ("sink%d", shaper->nconnections); connection->sinkpad = gst_pad_new_from_template (gst_static_pad_template_get (&shaper_sink_template), padname); g_free (padname); gst_pad_set_getcaps_function (connection->sinkpad, gst_shaper_getcaps); gst_pad_set_internal_link_function (connection->sinkpad, gst_shaper_get_internal_link); gst_pad_set_link_function (connection->sinkpad, gst_shaper_link); gst_pad_set_element_private (connection->sinkpad, connection); gst_element_add_pad (GST_ELEMENT (shaper), connection->sinkpad); padname = g_strdup_printf ("src%d", shaper->nconnections); connection->srcpad = gst_pad_new_from_template (gst_static_pad_template_get (&shaper_src_template), padname); g_free (padname); gst_pad_set_getcaps_function (connection->srcpad, gst_shaper_getcaps); gst_pad_set_internal_link_function (connection->srcpad, gst_shaper_get_internal_link); gst_pad_set_link_function (connection->srcpad, gst_shaper_link); gst_pad_set_element_private (connection->srcpad, connection); gst_element_add_pad (GST_ELEMENT (shaper), connection->srcpad); shaper->connections = g_slist_prepend (shaper->connections, connection); return connection; } static GstPad * gst_shaper_request_new_pad (GstElement * element, GstPadTemplate * templ, const gchar * unused) { GstShaper *shaper = GST_SHAPER (element); GstShaperConnection *connection; connection = gst_shaper_create_connection (shaper); return connection->sinkpad; } static void gst_shaper_init (GstShaper * shaper, GstShaperClass * g_class) { gst_element_set_loop_function (GST_ELEMENT (shaper), gst_shaper_loop); shaper->policy = SHAPER_POLICY_TIMESTAMPS; shaper->connections = NULL; shaper->nconnections = 0; shaper->silent = FALSE; shaper->last_message = NULL; } static void gst_shaper_loop (GstElement * element) { GstShaper *shaper; GSList *connections; gboolean eos = TRUE; GstShaperConnection *min = NULL; shaper = GST_SHAPER (element); /* first make sure we have a buffer on all pads */ connections = shaper->connections; while (connections) { GstShaperConnection *connection = (GstShaperConnection *) connections->data; /* try to fill a connection without a buffer on a pad that is * active */ if (connection->buffer == NULL && GST_PAD_IS_USABLE (connection->sinkpad)) { GstBuffer *buffer; buffer = GST_BUFFER (gst_pad_pull (connection->sinkpad)); /* events are simply pushed ASAP */ if (GST_IS_EVENT (buffer)) { /* save event type as it will be unreffed after the next push */ GstEventType type = GST_EVENT_TYPE (buffer); gst_pad_push (connection->srcpad, GST_DATA (buffer)); switch (type) { /* on EOS we disable the pad so that we don't pull on * it again and never get more data */ case GST_EVENT_EOS: gst_pad_set_active (connection->sinkpad, FALSE); break; default: break; } } else { /* we store the buffer */ connection->buffer = buffer; } } /* FIXME policy stuff goes here */ /* find connection with lowest timestamp */ if (min == NULL || (connection->buffer != NULL && (GST_BUFFER_TIMESTAMP (connection->buffer) < GST_BUFFER_TIMESTAMP (min->buffer)))) { min = connection; } connections = g_slist_next (connections); } /* if we have a connection with a buffer, push it */ if (min != NULL && min->buffer) { gst_pad_push (min->srcpad, GST_DATA (min->buffer)); min->buffer = NULL; /* since we pushed a buffer, it's not EOS */ eos = FALSE; } if (eos) { gst_element_set_eos (element); } } static void gst_shaper_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstShaper *shaper; g_return_if_fail (GST_IS_SHAPER (object)); shaper = GST_SHAPER (object); switch (prop_id) { case ARG_POLICY: shaper->policy = g_value_get_enum (value); break; case ARG_SILENT: shaper->silent = g_value_get_boolean (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_shaper_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstShaper *shaper; g_return_if_fail (GST_IS_SHAPER (object)); shaper = GST_SHAPER (object); switch (prop_id) { case ARG_POLICY: g_value_set_enum (value, shaper->policy); break; case ARG_SILENT: g_value_set_boolean (value, shaper->silent); break; case ARG_LAST_MESSAGE: g_value_set_string (value, shaper->last_message); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } }