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Original commit message from CVS: * gst/base/gstbasetransform.c: (gst_base_transform_proxy_getcaps): * gst/elements/gstcapsfilter.c: (gst_capsfilter_getcaps): * gst/gstpad.c: (gst_pad_peer_get_caps): * gst/gstqueue.c: (gst_queue_init), (gst_queue_getcaps), (gst_queue_bufferalloc), (gst_queue_handle_sink_event), (gst_queue_src_activate), (gst_queue_change_state): * gst/gstqueue.h: * gst/gstutils.c: (gst_element_get_compatible_pad_template), (intersect_caps_func): Fix gst_pad_peer_get_caps(), make it return NULL if no peer. Always take QUEUE_LOCK after STREAM_LOCK or we might deadlock. Some fixes for the peer_get_caps() change.
419 lines
11 KiB
C
419 lines
11 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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* 2005 Wim Taymans <wim@fluendo.com>
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*
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* gstbasetransform.c:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <stdlib.h>
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "../gst-i18n-lib.h"
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#include "gstbasetransform.h"
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#include <gst/gstmarshal.h>
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GST_DEBUG_CATEGORY_STATIC (gst_base_transform_debug);
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#define GST_CAT_DEFAULT gst_base_transform_debug
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/* BaseTransform signals and args */
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enum
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{
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SIGNAL_HANDOFF,
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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PROP_0,
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};
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static GstElementClass *parent_class = NULL;
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static void gst_base_transform_base_init (gpointer g_class);
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static void gst_base_transform_class_init (GstBaseTransformClass * klass);
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static void gst_base_transform_init (GstBaseTransform * trans,
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gpointer g_class);
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GType
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gst_base_transform_get_type (void)
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{
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static GType base_transform_type = 0;
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if (!base_transform_type) {
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static const GTypeInfo base_transform_info = {
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sizeof (GstBaseTransformClass),
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(GBaseInitFunc) gst_base_transform_base_init,
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NULL,
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(GClassInitFunc) gst_base_transform_class_init,
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NULL,
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NULL,
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sizeof (GstBaseTransform),
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0,
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(GInstanceInitFunc) gst_base_transform_init,
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};
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base_transform_type = g_type_register_static (GST_TYPE_ELEMENT,
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"GstBaseTransform", &base_transform_info, G_TYPE_FLAG_ABSTRACT);
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}
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return base_transform_type;
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}
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static void gst_base_transform_finalize (GObject * object);
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static void gst_base_transform_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_base_transform_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_base_transform_src_activate (GstPad * pad,
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GstActivateMode mode);
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static gboolean gst_base_transform_sink_activate (GstPad * pad,
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GstActivateMode mode);
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static GstElementStateReturn gst_base_transform_change_state (GstElement *
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element);
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static gboolean gst_base_transform_event (GstPad * pad, GstEvent * event);
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static GstFlowReturn gst_base_transform_getrange (GstPad * pad, guint64 offset,
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guint length, GstBuffer ** buffer);
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static GstFlowReturn gst_base_transform_chain (GstPad * pad,
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GstBuffer * buffer);
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static GstFlowReturn gst_base_transform_handle_buffer (GstBaseTransform * trans,
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GstBuffer * inbuf, GstBuffer ** outbuf);
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static GstCaps *gst_base_transform_proxy_getcaps (GstPad * pad);
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static gboolean gst_base_transform_setcaps (GstPad * pad, GstCaps * caps);
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/* static guint gst_base_transform_signals[LAST_SIGNAL] = { 0 }; */
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static void
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gst_base_transform_base_init (gpointer g_class)
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{
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GST_DEBUG_CATEGORY_INIT (gst_base_transform_debug, "basetransform", 0,
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"basetransform element");
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}
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static void
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gst_base_transform_finalize (GObject * object)
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{
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_base_transform_class_init (GstBaseTransformClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = G_OBJECT_CLASS (klass);
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gstelement_class = GST_ELEMENT_CLASS (klass);
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parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
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gobject_class->set_property =
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GST_DEBUG_FUNCPTR (gst_base_transform_set_property);
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gobject_class->get_property =
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GST_DEBUG_FUNCPTR (gst_base_transform_get_property);
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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_transform_finalize);
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_base_transform_change_state);
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}
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static void
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gst_base_transform_init (GstBaseTransform * trans, gpointer g_class)
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{
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GstPadTemplate *pad_template;
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GST_DEBUG ("gst_base_transform_init");
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pad_template =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "sink");
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g_return_if_fail (pad_template != NULL);
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trans->sinkpad = gst_pad_new_from_template (pad_template, "sink");
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gst_pad_set_getcaps_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_proxy_getcaps));
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gst_pad_set_setcaps_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_setcaps));
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gst_pad_set_event_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_event));
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gst_pad_set_chain_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_chain));
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gst_pad_set_activate_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_sink_activate));
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gst_element_add_pad (GST_ELEMENT (trans), trans->sinkpad);
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pad_template =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "src");
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g_return_if_fail (pad_template != NULL);
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trans->srcpad = gst_pad_new_from_template (pad_template, "src");
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gst_pad_set_getcaps_function (trans->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_proxy_getcaps));
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gst_pad_set_getrange_function (trans->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_getrange));
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gst_pad_set_activate_function (trans->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_src_activate));
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gst_element_add_pad (GST_ELEMENT (trans), trans->srcpad);
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}
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static GstCaps *
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gst_base_transform_proxy_getcaps (GstPad * pad)
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{
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GstPad *otherpad;
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GstBaseTransform *trans;
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GstCaps *caps;
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trans = GST_BASE_TRANSFORM (GST_OBJECT_PARENT (pad));
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otherpad = pad == trans->srcpad ? trans->sinkpad : trans->srcpad;
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/* we can do whatever the peer can do */
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caps = gst_pad_peer_get_caps (otherpad);
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if (caps == NULL) {
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/* no peer, then the padtemplate is enough */
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caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
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}
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return caps;
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}
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static gboolean
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gst_base_transform_setcaps (GstPad * pad, GstCaps * caps)
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{
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GstBaseTransform *trans;
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GstBaseTransformClass *bclass;
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gboolean result = TRUE;
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trans = GST_BASE_TRANSFORM (GST_PAD_PARENT (pad));
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bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
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if (bclass->set_caps)
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result = bclass->set_caps (trans, caps);
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return result;
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}
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static gboolean
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gst_base_transform_event (GstPad * pad, GstEvent * event)
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{
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GstBaseTransform *trans;
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GstBaseTransformClass *bclass;
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gboolean ret = FALSE;
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trans = GST_BASE_TRANSFORM (GST_PAD_PARENT (pad));
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bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
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if (bclass->event)
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bclass->event (trans, event);
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_FLUSH:
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if (GST_EVENT_FLUSH_DONE (event)) {
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}
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GST_STREAM_LOCK (pad);
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break;
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case GST_EVENT_EOS:
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GST_STREAM_LOCK (pad);
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break;
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default:
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break;
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}
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ret = gst_pad_event_default (pad, event);
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GST_STREAM_UNLOCK (pad);
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return ret;
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}
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static GstFlowReturn
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gst_base_transform_getrange (GstPad * pad, guint64 offset,
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guint length, GstBuffer ** buffer)
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{
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GstBaseTransform *trans;
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GstFlowReturn ret;
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GstBuffer *inbuf;
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trans = GST_BASE_TRANSFORM (GST_PAD_PARENT (pad));
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GST_STREAM_LOCK (pad);
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ret = gst_pad_pull_range (trans->sinkpad, offset, length, &inbuf);
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if (ret == GST_FLOW_OK) {
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ret = gst_base_transform_handle_buffer (trans, inbuf, buffer);
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}
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GST_STREAM_UNLOCK (pad);
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return ret;
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}
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static GstFlowReturn
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gst_base_transform_chain (GstPad * pad, GstBuffer * buffer)
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{
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GstBaseTransform *trans;
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GstFlowReturn ret = GST_FLOW_OK;
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GstBuffer *outbuf;
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trans = GST_BASE_TRANSFORM (GST_PAD_PARENT (pad));
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GST_STREAM_LOCK (pad);
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ret = gst_base_transform_handle_buffer (trans, buffer, &outbuf);
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if (ret == GST_FLOW_OK) {
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ret = gst_pad_push (trans->srcpad, outbuf);
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}
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GST_STREAM_UNLOCK (pad);
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return ret;
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}
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static GstFlowReturn
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gst_base_transform_handle_buffer (GstBaseTransform * trans, GstBuffer * inbuf,
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GstBuffer ** outbuf)
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{
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GstFlowReturn ret = GST_FLOW_OK;
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GstBaseTransformClass *bclass;
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bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
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if (bclass->transform)
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ret = bclass->transform (trans, inbuf, outbuf);
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gst_buffer_unref (inbuf);
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return ret;
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}
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static void
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gst_base_transform_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstBaseTransform *trans;
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trans = GST_BASE_TRANSFORM (object);
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switch (prop_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_base_transform_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstBaseTransform *trans;
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trans = GST_BASE_TRANSFORM (object);
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switch (prop_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static gboolean
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gst_base_transform_sink_activate (GstPad * pad, GstActivateMode mode)
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{
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gboolean result = TRUE;
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GstBaseTransform *trans;
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GstBaseTransformClass *bclass;
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trans = GST_BASE_TRANSFORM (GST_OBJECT_PARENT (pad));
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bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
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switch (mode) {
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case GST_ACTIVATE_PUSH:
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case GST_ACTIVATE_PULL:
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if (bclass->start)
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result = bclass->start (trans);
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break;
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case GST_ACTIVATE_NONE:
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break;
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}
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return result;
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}
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static gboolean
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gst_base_transform_src_activate (GstPad * pad, GstActivateMode mode)
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{
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gboolean result = FALSE;
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GstBaseTransform *trans;
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trans = GST_BASE_TRANSFORM (GST_OBJECT_PARENT (pad));
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switch (mode) {
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case GST_ACTIVATE_PUSH:
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result = TRUE;
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break;
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case GST_ACTIVATE_PULL:
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result = gst_pad_set_active (trans->sinkpad, mode);
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result = gst_pad_peer_set_active (trans->sinkpad, mode);
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break;
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case GST_ACTIVATE_NONE:
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result = TRUE;
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break;
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}
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return result;
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}
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static GstElementStateReturn
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gst_base_transform_change_state (GstElement * element)
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{
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GstBaseTransform *trans;
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GstBaseTransformClass *bclass;
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GstElementState transition;
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GstElementStateReturn result;
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trans = GST_BASE_TRANSFORM (element);
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bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
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transition = GST_STATE_TRANSITION (element);
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switch (transition) {
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case GST_STATE_NULL_TO_READY:
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break;
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case GST_STATE_READY_TO_PAUSED:
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break;
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case GST_STATE_PAUSED_TO_PLAYING:
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break;
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default:
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break;
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}
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result = GST_ELEMENT_CLASS (parent_class)->change_state (element);
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switch (transition) {
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case GST_STATE_PLAYING_TO_PAUSED:
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break;
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case GST_STATE_PAUSED_TO_READY:
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if (bclass->stop)
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result = bclass->stop (trans);
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break;
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case GST_STATE_READY_TO_NULL:
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break;
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default:
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break;
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}
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return result;
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}
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