/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2000 Wim Taymans * * 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 #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 " ); /* 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; } static void gst_shaper_base_init (gpointer g_class); static void gst_shaper_class_init (GstShaperClass *klass); static void gst_shaper_init (GstShaper *shaper); 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 GstElementClass *parent_class = NULL; /* static guint gst_shaper_signals[LAST_SIGNAL] = { 0 }; */ GType gst_shaper_get_type (void) { static GType shaper_type = 0; if (!shaper_type) { static const GTypeInfo shaper_info = { sizeof(GstShaperClass), gst_shaper_base_init, NULL, (GClassInitFunc)gst_shaper_class_init, NULL, NULL, sizeof(GstShaper), 0, (GInstanceInitFunc)gst_shaper_init, }; shaper_type = g_type_register_static (GST_TYPE_ELEMENT, "GstShaper", &shaper_info, 0); GST_DEBUG_CATEGORY_INIT (gst_shaper_debug, "shaper", 0, "shaper element"); } return shaper_type; } 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; parent_class = g_type_class_ref (GST_TYPE_ELEMENT); 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)); gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_shaper_set_property); gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_shaper_get_property); 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); return gst_caps_copy (gst_pad_get_allowed_caps (otherpad)); } 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_proxy_link (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) { 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; /* it's not null if we got it, but it might not be ours */ 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; /* it's not null if we got it, but it might not be ours */ 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; } }