/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2000 Wim Taymans * * gstidentity.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 #include GstElementDetails gst_identity_details = { "Identity", "Filter", "Pass data without modification", VERSION, "Erik Walthinsen ", "(C) 1999", }; /* Identity signals and args */ enum { SIGNAL_HANDOFF, /* FILL ME */ LAST_SIGNAL }; enum { ARG_0, ARG_LOOP_BASED, ARG_SLEEP_TIME, ARG_DUPLICATE, ARG_ERROR_AFTER, ARG_DROP_PROBABILITY, ARG_SILENT, ARG_LAST_MESSAGE, ARG_DUMP, }; static void gst_identity_class_init (GstIdentityClass *klass); static void gst_identity_init (GstIdentity *identity); static void gst_identity_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gst_identity_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static void gst_identity_chain (GstPad *pad, GstBuffer *buf); static GstElementClass *parent_class = NULL; static guint gst_identity_signals[LAST_SIGNAL] = { 0 }; GType gst_identity_get_type (void) { static GType identity_type = 0; if (!identity_type) { static const GTypeInfo identity_info = { sizeof(GstIdentityClass), NULL, NULL, (GClassInitFunc)gst_identity_class_init, NULL, NULL, sizeof(GstIdentity), 0, (GInstanceInitFunc)gst_identity_init, }; identity_type = g_type_register_static (GST_TYPE_ELEMENT, "GstIdentity", &identity_info, 0); } return identity_type; } static void gst_identity_class_init (GstIdentityClass *klass) { GObjectClass *gobject_class; gobject_class = (GObjectClass*)klass; parent_class = g_type_class_ref (GST_TYPE_ELEMENT); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOOP_BASED, g_param_spec_boolean ("loop_based", "loop_based", "loop_based", TRUE, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SLEEP_TIME, g_param_spec_uint ("sleep_time", "sleep_time", "sleep_time", 0, G_MAXUINT, 0, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DUPLICATE, g_param_spec_uint ("duplicate", "Duplicate Buffers", "Push the buffers N times", 0, G_MAXUINT, 1, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ERROR_AFTER, g_param_spec_int ("error_after", "Error After", "Error after N buffers", G_MININT, G_MAXINT, -1, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DROP_PROBABILITY, g_param_spec_float ("drop_probability", "Drop Probability", "The Probability a buffer is dropped", 0.0, 1.0, 0.0, G_PARAM_READWRITE)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SILENT, g_param_spec_boolean ("silent", "silent", "silent", TRUE,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)); g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DUMP, g_param_spec_boolean("dump","Dump","Dump buffer contents", FALSE, G_PARAM_READWRITE)); gst_identity_signals[SIGNAL_HANDOFF] = g_signal_new ("handoff", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstIdentityClass, handoff), NULL, NULL, g_cclosure_marshal_VOID__POINTER, G_TYPE_NONE, 1, G_TYPE_POINTER); gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_identity_set_property); gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_identity_get_property); } static GstBufferPool* gst_identity_get_bufferpool (GstPad *pad) { GstIdentity *identity; identity = GST_IDENTITY (gst_pad_get_parent (pad)); return gst_pad_get_bufferpool (identity->srcpad); } static GstCaps* gst_identity_getcaps (GstPad *pad, GstCaps *caps) { GstIdentity *identity; GstPad *otherpad; identity = GST_IDENTITY (gst_pad_get_parent (pad)); otherpad = (pad == identity->srcpad ? identity->sinkpad : identity->srcpad); return gst_pad_get_allowed_caps (otherpad); } static GstPadConnectReturn gst_identity_connect (GstPad *pad, GstCaps *caps) { GstIdentity *identity; GstPad *otherpad; identity = GST_IDENTITY (gst_pad_get_parent (pad)); otherpad = (pad == identity->srcpad ? identity->sinkpad : identity->srcpad); if (GST_CAPS_IS_FIXED (caps)) if (gst_pad_try_set_caps (otherpad, caps)) return GST_PAD_CONNECT_OK; else return GST_PAD_CONNECT_REFUSED; else return GST_PAD_CONNECT_DELAYED; } static void gst_identity_init (GstIdentity *identity) { identity->sinkpad = gst_pad_new ("sink", GST_PAD_SINK); gst_element_add_pad (GST_ELEMENT (identity), identity->sinkpad); gst_pad_set_chain_function (identity->sinkpad, GST_DEBUG_FUNCPTR (gst_identity_chain)); gst_pad_set_bufferpool_function (identity->sinkpad, gst_identity_get_bufferpool); gst_pad_set_connect_function (identity->sinkpad, gst_identity_connect); gst_pad_set_getcaps_function (identity->sinkpad, gst_identity_getcaps); identity->srcpad = gst_pad_new ("src", GST_PAD_SRC); gst_element_add_pad (GST_ELEMENT (identity), identity->srcpad); gst_pad_set_connect_function (identity->srcpad, gst_identity_connect); gst_pad_set_getcaps_function (identity->srcpad, gst_identity_getcaps); identity->loop_based = FALSE; identity->sleep_time = 0; identity->duplicate = 1; identity->error_after = -1; identity->drop_probability = 0.0; identity->silent = FALSE; identity->dump = FALSE; } static void gst_identity_chain (GstPad *pad, GstBuffer *buf) { GstIdentity *identity; guint i; g_return_if_fail (pad != NULL); g_return_if_fail (GST_IS_PAD (pad)); g_return_if_fail (buf != NULL); identity = GST_IDENTITY (gst_pad_get_parent (pad)); if (identity->error_after >= 0) { identity->error_after--; if (identity->error_after == 0) { gst_buffer_unref (buf); gst_element_error (GST_ELEMENT (identity), "errored after iterations as requested"); return; } } if (identity->drop_probability > 0.0) { if ((gfloat)(1.0*rand()/(RAND_MAX)) < identity->drop_probability) { identity->last_message = g_strdup_printf ("dropping ******* (%s:%s)i (%d bytes, %llu)", GST_DEBUG_PAD_NAME (identity->sinkpad), GST_BUFFER_SIZE (buf), GST_BUFFER_TIMESTAMP (buf)); g_object_notify (G_OBJECT (identity), "last-message"); gst_buffer_unref (buf); return; } } if (identity->dump) { gst_util_dump_mem (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf)); } for (i = identity->duplicate; i; i--) { if (!identity->silent) identity->last_message = g_strdup_printf ("chain ******* (%s:%s)i (%d bytes, %llu)", GST_DEBUG_PAD_NAME (identity->sinkpad), GST_BUFFER_SIZE (buf), GST_BUFFER_TIMESTAMP (buf)); g_object_notify (G_OBJECT (identity), "last-message"); g_signal_emit (G_OBJECT (identity), gst_identity_signals[SIGNAL_HANDOFF], 0, buf); if (i>1) gst_buffer_ref (buf); gst_pad_push (identity->srcpad, buf); if (identity->sleep_time) usleep (identity->sleep_time); } } static void gst_identity_loop (GstElement *element) { GstIdentity *identity; GstBuffer *buf; g_return_if_fail (element != NULL); g_return_if_fail (GST_IS_IDENTITY (element)); identity = GST_IDENTITY (element); buf = gst_pad_pull (identity->sinkpad); if (GST_IS_EVENT (buf)) { gst_pad_event_default (identity->sinkpad, GST_EVENT (buf)); } gst_identity_chain (identity->sinkpad, buf); } static void gst_identity_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GstIdentity *identity; /* it's not null if we got it, but it might not be ours */ g_return_if_fail (GST_IS_IDENTITY (object)); identity = GST_IDENTITY (object); switch (prop_id) { case ARG_LOOP_BASED: identity->loop_based = g_value_get_boolean (value); if (identity->loop_based) { gst_element_set_loop_function (GST_ELEMENT (identity), gst_identity_loop); gst_pad_set_chain_function (identity->sinkpad, NULL); } else { gst_pad_set_chain_function (identity->sinkpad, gst_identity_chain); gst_element_set_loop_function (GST_ELEMENT (identity), NULL); } break; case ARG_SLEEP_TIME: identity->sleep_time = g_value_get_uint (value); break; case ARG_SILENT: identity->silent = g_value_get_boolean (value); break; case ARG_DUPLICATE: identity->duplicate = g_value_get_uint (value); break; case ARG_DUMP: identity->dump = g_value_get_boolean (value); break; case ARG_ERROR_AFTER: identity->error_after = g_value_get_uint (value); break; case ARG_DROP_PROBABILITY: identity->drop_probability = g_value_get_float (value); break; default: break; } } static void gst_identity_get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GstIdentity *identity; /* it's not null if we got it, but it might not be ours */ g_return_if_fail (GST_IS_IDENTITY (object)); identity = GST_IDENTITY (object); switch (prop_id) { case ARG_LOOP_BASED: g_value_set_boolean (value, identity->loop_based); break; case ARG_SLEEP_TIME: g_value_set_uint (value, identity->sleep_time); break; case ARG_DUPLICATE: g_value_set_uint (value, identity->duplicate); break; case ARG_ERROR_AFTER: g_value_set_uint (value, identity->error_after); break; case ARG_DROP_PROBABILITY: g_value_set_float (value, identity->drop_probability); break; case ARG_SILENT: g_value_set_boolean (value, identity->silent); break; case ARG_DUMP: g_value_set_boolean (value, identity->dump); break; case ARG_LAST_MESSAGE: g_value_set_string (value, identity->last_message); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } }