gstreamer/libs/gst/base/gstbasetransform.c
Andy Wingo e44beb9f04 gst/elements/gstfakesink.c (gst_fakesink_render): Er, emit with
Original commit message from CVS:
2005-05-10  Andy Wingo  <wingo@pobox.com>

* gst/elements/gstfakesink.c (gst_fakesink_render): Er, emit with
*all* the arguments.

* gst/base/gstbasetransform.c (gst_base_transform_event): Grab the
stream lock if it's a FLUSH_DONE; normal flushes don't get the
lock (according to the docs -- if this is wrong change the docs).

* gst/gstpipeline.c (gst_pipeline_change_state): Set the bus to
flush messages in the NULL state.

* gst/gstbus.c (gst_bus_post): If a bus is flushing, unref the
message immediately and return.
(gst_bus_set_flushing): New function. If a bus is flushing, it
flushes out any queued messages and immediately unrefs new
messages. This is so when an element goes to NULL, all of the
unhandled messages coming from it can be freed, and their
references to the element dropped. In other words: message source
ref considered harmful :P

* gst/gstbin.c (gst_bin_change_state): Unref peer element when
we're finished with it.

* gst/gstmessage.c (gst_message_new_state_changed):
2005-05-11 03:37:10 +00:00

432 lines
11 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* 2005 Wim Taymans <wim@fluendo.com>
*
* gstbasetransform.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 "../gst-i18n-lib.h"
#include "gstbasetransform.h"
#include <gst/gstmarshal.h>
GST_DEBUG_CATEGORY_STATIC (gst_base_transform_debug);
#define GST_CAT_DEFAULT gst_base_transform_debug
/* BaseTransform signals and args */
enum
{
SIGNAL_HANDOFF,
/* FILL ME */
LAST_SIGNAL
};
enum
{
PROP_0,
};
static GstElementClass *parent_class = NULL;
static void gst_base_transform_base_init (gpointer g_class);
static void gst_base_transform_class_init (GstBaseTransformClass * klass);
static void gst_base_transform_init (GstBaseTransform * trans,
gpointer g_class);
GType
gst_base_transform_get_type (void)
{
static GType base_transform_type = 0;
if (!base_transform_type) {
static const GTypeInfo base_transform_info = {
sizeof (GstBaseTransformClass),
(GBaseInitFunc) gst_base_transform_base_init,
NULL,
(GClassInitFunc) gst_base_transform_class_init,
NULL,
NULL,
sizeof (GstBaseTransform),
0,
(GInstanceInitFunc) gst_base_transform_init,
};
base_transform_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstBaseTransform", &base_transform_info, G_TYPE_FLAG_ABSTRACT);
}
return base_transform_type;
}
static void gst_base_transform_finalize (GObject * object);
static void gst_base_transform_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_base_transform_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_base_transform_src_activate (GstPad * pad,
GstActivateMode mode);
static gboolean gst_base_transform_sink_activate (GstPad * pad,
GstActivateMode mode);
static GstElementStateReturn gst_base_transform_change_state (GstElement *
element);
static gboolean gst_base_transform_event (GstPad * pad, GstEvent * event);
static GstFlowReturn gst_base_transform_getrange (GstPad * pad, guint64 offset,
guint length, GstBuffer ** buffer);
static GstFlowReturn gst_base_transform_chain (GstPad * pad,
GstBuffer * buffer);
static GstFlowReturn gst_base_transform_handle_buffer (GstBaseTransform * trans,
GstBuffer * inbuf, GstBuffer ** outbuf);
static GstCaps *gst_base_transform_proxy_getcaps (GstPad * pad);
static gboolean gst_base_transform_setcaps (GstPad * pad, GstCaps * caps);
/* static guint gst_base_transform_signals[LAST_SIGNAL] = { 0 }; */
static void
gst_base_transform_base_init (gpointer g_class)
{
GST_DEBUG_CATEGORY_INIT (gst_base_transform_debug, "basetransform", 0,
"basetransform element");
}
static void
gst_base_transform_finalize (GObject * object)
{
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_base_transform_class_init (GstBaseTransformClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = G_OBJECT_CLASS (klass);
gstelement_class = GST_ELEMENT_CLASS (klass);
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->set_property =
GST_DEBUG_FUNCPTR (gst_base_transform_set_property);
gobject_class->get_property =
GST_DEBUG_FUNCPTR (gst_base_transform_get_property);
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_base_transform_finalize);
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_base_transform_change_state);
}
static void
gst_base_transform_init (GstBaseTransform * trans, gpointer g_class)
{
GstPadTemplate *pad_template;
GST_DEBUG ("gst_base_transform_init");
pad_template =
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "sink");
g_return_if_fail (pad_template != NULL);
trans->sinkpad = gst_pad_new_from_template (pad_template, "sink");
gst_pad_set_getcaps_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_proxy_getcaps));
gst_pad_set_setcaps_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_setcaps));
gst_pad_set_event_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_event));
gst_pad_set_chain_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_chain));
gst_pad_set_activate_function (trans->sinkpad,
GST_DEBUG_FUNCPTR (gst_base_transform_sink_activate));
gst_element_add_pad (GST_ELEMENT (trans), trans->sinkpad);
pad_template =
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "src");
g_return_if_fail (pad_template != NULL);
trans->srcpad = gst_pad_new_from_template (pad_template, "src");
gst_pad_set_getcaps_function (trans->srcpad,
GST_DEBUG_FUNCPTR (gst_base_transform_proxy_getcaps));
gst_pad_set_getrange_function (trans->srcpad,
GST_DEBUG_FUNCPTR (gst_base_transform_getrange));
gst_pad_set_activate_function (trans->srcpad,
GST_DEBUG_FUNCPTR (gst_base_transform_src_activate));
gst_element_add_pad (GST_ELEMENT (trans), trans->srcpad);
}
static GstCaps *
gst_base_transform_proxy_getcaps (GstPad * pad)
{
GstPad *otherpad;
GstBaseTransform *trans;
GstCaps *caps;
const GstCaps *templcaps;
trans = GST_BASE_TRANSFORM (GST_OBJECT_PARENT (pad));
otherpad = pad == trans->srcpad ? trans->sinkpad : trans->srcpad;
/* we can do whatever the peer can do */
caps = gst_pad_peer_get_caps (otherpad);
templcaps = gst_pad_get_pad_template_caps (pad);
if (caps == NULL) {
/* no peer, then the padtemplate is enough */
return gst_caps_copy (templcaps);
} else {
GstCaps *ret = gst_caps_intersect (caps, templcaps);
gst_caps_unref (caps);
return ret;
}
}
static gboolean
gst_base_transform_setcaps (GstPad * pad, GstCaps * caps)
{
GstBaseTransform *trans;
GstBaseTransformClass *bclass;
gboolean result = TRUE;
trans = GST_BASE_TRANSFORM (GST_PAD_PARENT (pad));
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
if (bclass->set_caps)
result = bclass->set_caps (trans, caps);
return result;
}
static gboolean
gst_base_transform_event (GstPad * pad, GstEvent * event)
{
GstBaseTransform *trans;
GstBaseTransformClass *bclass;
gboolean ret = FALSE;
gboolean unlock;
trans = GST_BASE_TRANSFORM (GST_PAD_PARENT (pad));
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
if (bclass->event)
bclass->event (trans, event);
unlock = FALSE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH:
if (GST_EVENT_FLUSH_DONE (event)) {
GST_STREAM_LOCK (pad);
unlock = TRUE;
}
break;
case GST_EVENT_EOS:
GST_STREAM_LOCK (pad);
unlock = TRUE;
break;
default:
break;
}
ret = gst_pad_event_default (pad, event);
if (unlock)
GST_STREAM_UNLOCK (pad);
return ret;
}
static GstFlowReturn
gst_base_transform_getrange (GstPad * pad, guint64 offset,
guint length, GstBuffer ** buffer)
{
GstBaseTransform *trans;
GstFlowReturn ret;
GstBuffer *inbuf;
trans = GST_BASE_TRANSFORM (GST_PAD_PARENT (pad));
GST_STREAM_LOCK (pad);
ret = gst_pad_pull_range (trans->sinkpad, offset, length, &inbuf);
if (ret == GST_FLOW_OK) {
ret = gst_base_transform_handle_buffer (trans, inbuf, buffer);
}
GST_STREAM_UNLOCK (pad);
return ret;
}
static GstFlowReturn
gst_base_transform_chain (GstPad * pad, GstBuffer * buffer)
{
GstBaseTransform *trans;
GstFlowReturn ret = GST_FLOW_OK;
GstBuffer *outbuf;
trans = GST_BASE_TRANSFORM (GST_PAD_PARENT (pad));
GST_STREAM_LOCK (pad);
ret = gst_base_transform_handle_buffer (trans, buffer, &outbuf);
if (ret == GST_FLOW_OK) {
ret = gst_pad_push (trans->srcpad, outbuf);
}
GST_STREAM_UNLOCK (pad);
return ret;
}
static GstFlowReturn
gst_base_transform_handle_buffer (GstBaseTransform * trans, GstBuffer * inbuf,
GstBuffer ** outbuf)
{
GstFlowReturn ret = GST_FLOW_OK;
GstBaseTransformClass *bclass;
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
if (bclass->transform)
ret = bclass->transform (trans, inbuf, outbuf);
gst_buffer_unref (inbuf);
return ret;
}
static void
gst_base_transform_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstBaseTransform *trans;
trans = GST_BASE_TRANSFORM (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_base_transform_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstBaseTransform *trans;
trans = GST_BASE_TRANSFORM (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_base_transform_sink_activate (GstPad * pad, GstActivateMode mode)
{
gboolean result = TRUE;
GstBaseTransform *trans;
GstBaseTransformClass *bclass;
trans = GST_BASE_TRANSFORM (GST_OBJECT_PARENT (pad));
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
switch (mode) {
case GST_ACTIVATE_PUSH:
case GST_ACTIVATE_PULL:
if (bclass->start)
result = bclass->start (trans);
break;
case GST_ACTIVATE_NONE:
break;
}
return result;
}
static gboolean
gst_base_transform_src_activate (GstPad * pad, GstActivateMode mode)
{
gboolean result = FALSE;
GstBaseTransform *trans;
trans = GST_BASE_TRANSFORM (GST_OBJECT_PARENT (pad));
switch (mode) {
case GST_ACTIVATE_PUSH:
result = TRUE;
break;
case GST_ACTIVATE_PULL:
result = gst_pad_set_active (trans->sinkpad, mode);
result = gst_pad_peer_set_active (trans->sinkpad, mode);
break;
case GST_ACTIVATE_NONE:
result = TRUE;
break;
}
return result;
}
static GstElementStateReturn
gst_base_transform_change_state (GstElement * element)
{
GstBaseTransform *trans;
GstBaseTransformClass *bclass;
GstElementState transition;
GstElementStateReturn result;
trans = GST_BASE_TRANSFORM (element);
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
transition = GST_STATE_TRANSITION (element);
switch (transition) {
case GST_STATE_NULL_TO_READY:
break;
case GST_STATE_READY_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_PLAYING:
break;
default:
break;
}
result = GST_ELEMENT_CLASS (parent_class)->change_state (element);
switch (transition) {
case GST_STATE_PLAYING_TO_PAUSED:
break;
case GST_STATE_PAUSED_TO_READY:
if (bclass->stop)
result = bclass->stop (trans);
break;
case GST_STATE_READY_TO_NULL:
break;
default:
break;
}
return result;
}