gstreamer/gst/autoplug/gstspideridentity.c
Thomas Vander Stichele 7baa6c18e7 don't mix tabs and spaces
Original commit message from CVS:
don't mix tabs and spaces
2004-03-15 19:27:17 +00:00

593 lines
18 KiB
C

/* GStreamer
* Copyright (C) 2002 Erik Walthinsen <omega@cse.ogi.edu>
* 2002 Wim Taymans <wtay@chello.be>
*
* gstspideridentity.c: identity element for the spider autoplugger
*
* 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gstspideridentity.h"
#include "gstspider.h"
GST_DEBUG_CATEGORY_STATIC (gst_spider_identity_debug);
#define GST_CAT_DEFAULT gst_spider_identity_debug
static GstElementDetails gst_spider_identity_details =
GST_ELEMENT_DETAILS ("SpiderIdentity",
"Generic",
"Link between spider and outside elements",
"Benjamin Otte <in7y118@public.uni-hamburg.de>");
/* generic templates
* delete me when meging with spider.c
*/
static GstStaticPadTemplate spider_src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate spider_sink_factory =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
/* SpiderIdentity signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0
/* FILL ME */
};
/* GObject stuff */
static void gst_spider_identity_class_init (GstSpiderIdentityClass * klass);
static void gst_spider_identity_init (GstSpiderIdentity * spider_identity);
/* functions set in pads, elements and stuff */
static void gst_spider_identity_chain (GstPad * pad, GstBuffer * buf);
static GstElementStateReturn gst_spider_identity_change_state (GstElement *
element);
static GstPadLinkReturn gst_spider_identity_link (GstPad * pad,
const GstCaps * caps);
static GstCaps *gst_spider_identity_getcaps (GstPad * pad);
/* loop functions */
static void gst_spider_identity_dumb_loop (GstSpiderIdentity * ident);
static void gst_spider_identity_src_loop (GstSpiderIdentity * ident);
static void gst_spider_identity_sink_loop_type_finding (GstSpiderIdentity *
ident);
static gboolean gst_spider_identity_handle_src_event (GstPad * pad,
GstEvent * event);
/* other functions */
static void gst_spider_identity_start_type_finding (GstSpiderIdentity * ident);
static GstElementClass *parent_class = NULL;
/* no signals
static guint gst_spider_identity_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_spider_identity_get_type (void)
{
static GType spider_identity_type = 0;
if (!spider_identity_type) {
static const GTypeInfo spider_identity_info = {
sizeof (GstSpiderIdentityClass), NULL,
NULL,
(GClassInitFunc) gst_spider_identity_class_init,
NULL,
NULL,
sizeof (GstSpiderIdentity),
0,
(GInstanceInitFunc) gst_spider_identity_init,
};
spider_identity_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstSpiderIdentity",
&spider_identity_info, 0);
GST_DEBUG_CATEGORY_INIT (gst_spider_identity_debug, "spideridentity", 0,
"spider autoplugging proxy element");
}
return spider_identity_type;
}
static void
gst_spider_identity_class_init (GstSpiderIdentityClass * klass)
{
GstElementClass *gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
/* add our two pad templates */
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&spider_src_factory));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&spider_sink_factory));
gst_element_class_set_details (gstelement_class,
&gst_spider_identity_details);
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_spider_identity_change_state);
gstelement_class->request_new_pad =
GST_DEBUG_FUNCPTR (gst_spider_identity_request_new_pad);
}
static void
gst_spider_identity_init (GstSpiderIdentity * ident)
{
/* sink */
ident->sink =
gst_pad_new_from_template (gst_static_pad_template_get
(&spider_sink_factory), "sink");
gst_element_add_pad (GST_ELEMENT (ident), ident->sink);
gst_pad_set_link_function (ident->sink,
GST_DEBUG_FUNCPTR (gst_spider_identity_link));
gst_pad_set_getcaps_function (ident->sink,
GST_DEBUG_FUNCPTR (gst_spider_identity_getcaps));
/* src */
ident->src =
gst_pad_new_from_template (gst_static_pad_template_get
(&spider_src_factory), "src");
gst_element_add_pad (GST_ELEMENT (ident), ident->src);
gst_pad_set_link_function (ident->src,
GST_DEBUG_FUNCPTR (gst_spider_identity_link));
gst_pad_set_getcaps_function (ident->src,
GST_DEBUG_FUNCPTR (gst_spider_identity_getcaps));
gst_pad_set_event_function (ident->src,
GST_DEBUG_FUNCPTR (gst_spider_identity_handle_src_event));
/* variables */
ident->plugged = FALSE;
}
static void
gst_spider_identity_chain (GstPad * pad, GstBuffer * buf)
{
GstSpiderIdentity *ident;
/*g_print ("chaining on pad %s:%s with buffer %p\n", GST_DEBUG_PAD_NAME (pad), buf); */
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
if (buf == NULL)
return;
ident = GST_SPIDER_IDENTITY (gst_pad_get_parent (pad));
if (GST_IS_EVENT (buf)) {
/* start hack for current event stuff here */
/* check for unlinked elements and send them the EOS event, too */
if (GST_EVENT_TYPE (GST_EVENT (buf)) == GST_EVENT_EOS) {
GstSpider *spider = (GstSpider *) GST_OBJECT_PARENT (ident);
GList *list = spider->links;
while (list) {
GstSpiderConnection *conn = (GstSpiderConnection *) list->data;
list = g_list_next (list);
if (conn->current != (GstElement *) conn->src) {
GST_DEBUG ("sending EOS to unconnected element %s from %s",
GST_ELEMENT_NAME (conn->src), GST_ELEMENT_NAME (ident));
gst_pad_push (conn->src->src,
GST_DATA (GST_BUFFER (gst_event_new (GST_EVENT_EOS))));
gst_element_set_eos (GST_ELEMENT (conn->src));
}
}
}
/* end hack for current event stuff here */
gst_pad_event_default (pad, GST_EVENT (buf));
return;
}
if ((ident->src != NULL) && (GST_PAD_PEER (ident->src) != NULL)) {
/* g_print("pushing buffer %p (refcount %d - buffersize %d) to pad %s:%s\n", buf, GST_BUFFER_REFCOUNT (buf), GST_BUFFER_SIZE (buf), GST_DEBUG_PAD_NAME (ident->src)); */
GST_LOG ("push %p %" G_GINT64_FORMAT, buf, GST_BUFFER_OFFSET (buf));
gst_pad_push (ident->src, GST_DATA (buf));
} else if (GST_IS_BUFFER (buf)) {
gst_buffer_unref (buf);
}
}
GstSpiderIdentity *
gst_spider_identity_new_src (gchar * name)
{
GstSpiderIdentity *ret =
(GstSpiderIdentity *) gst_element_factory_make ("spideridentity", name);
/* set the right functions */
gst_element_set_loop_function (GST_ELEMENT (ret), (GstElementLoopFunction)
GST_DEBUG_FUNCPTR (gst_spider_identity_src_loop));
return ret;
}
GstSpiderIdentity *
gst_spider_identity_new_sink (gchar * name)
{
GstSpiderIdentity *ret =
(GstSpiderIdentity *) gst_element_factory_make ("spideridentity", name);
/* set the right functions */
gst_element_set_loop_function (GST_ELEMENT (ret), (GstElementLoopFunction)
GST_DEBUG_FUNCPTR (gst_spider_identity_dumb_loop));
return ret;
}
/* shamelessly stolen from gstqueue.c to get proxy links */
static GstPadLinkReturn
gst_spider_identity_link (GstPad * pad, const GstCaps * caps)
{
GstSpiderIdentity *spider_identity =
GST_SPIDER_IDENTITY (gst_pad_get_parent (pad));
GstPad *otherpad;
if (pad == spider_identity->src)
otherpad = spider_identity->sink;
else
otherpad = spider_identity->src;
g_return_val_if_fail (otherpad != NULL, GST_PAD_LINK_REFUSED);
if (GST_PAD_PEER (otherpad) == NULL)
return GST_PAD_LINK_DELAYED;
return gst_pad_try_set_caps (otherpad, caps);
}
static GstCaps *
gst_spider_identity_getcaps (GstPad * pad)
{
GstSpiderIdentity *ident = GST_SPIDER_IDENTITY (gst_pad_get_parent (pad));
GstPad *otherpad;
if (pad == ident->src)
otherpad = ident->sink;
else
otherpad = ident->src;
if (otherpad != NULL) {
if (GST_PAD_PEER (otherpad)) {
GstCaps *ret = gst_pad_get_allowed_caps (otherpad);
if (ident->caps) {
GstCaps *ret2 = gst_caps_intersect (ident->caps, ret);
gst_caps_free (ret);
ret = ret2;
}
return ret;
}
}
if (ident->caps)
return gst_caps_copy (ident->caps);
return gst_caps_new_any ();
}
GstPad *
gst_spider_identity_request_new_pad (GstElement * element,
GstPadTemplate * templ, const gchar * name)
{
GstSpiderIdentity *ident;
/*checks */
g_return_val_if_fail (templ != NULL, NULL);
g_return_val_if_fail (GST_IS_PAD_TEMPLATE (templ), NULL);
ident = GST_SPIDER_IDENTITY (element);
g_return_val_if_fail (ident != NULL, NULL);
g_return_val_if_fail (GST_IS_SPIDER_IDENTITY (ident), NULL);
switch (GST_PAD_TEMPLATE_DIRECTION (templ)) {
case GST_PAD_SINK:
if (ident->sink != NULL)
break;
/* sink */
GST_DEBUG ("element %s requests new sink pad", GST_ELEMENT_NAME (ident));
ident->sink = gst_pad_new ("sink", GST_PAD_SINK);
gst_element_add_pad (GST_ELEMENT (ident), ident->sink);
gst_pad_set_link_function (ident->sink,
GST_DEBUG_FUNCPTR (gst_spider_identity_link));
gst_pad_set_getcaps_function (ident->sink,
GST_DEBUG_FUNCPTR (gst_spider_identity_getcaps));
return ident->sink;
case GST_PAD_SRC:
/* src */
if (ident->src != NULL)
break;
GST_DEBUG ("element %s requests new src pad", GST_ELEMENT_NAME (ident));
ident->src = gst_pad_new ("src", GST_PAD_SRC);
gst_element_add_pad (GST_ELEMENT (ident), ident->src);
gst_pad_set_link_function (ident->src,
GST_DEBUG_FUNCPTR (gst_spider_identity_link));
gst_pad_set_getcaps_function (ident->src,
GST_DEBUG_FUNCPTR (gst_spider_identity_getcaps));
gst_pad_set_event_function (ident->src,
GST_DEBUG_FUNCPTR (gst_spider_identity_handle_src_event));
return ident->src;
default:
break;
}
GST_DEBUG ("element %s requested a new pad but none could be created",
GST_ELEMENT_NAME (ident));
return NULL;
}
/* this function has to
* - start the autoplugger
* - start type finding
* ...
*/
static GstElementStateReturn
gst_spider_identity_change_state (GstElement * element)
{
GstSpiderIdentity *ident;
GstSpider *spider;
GstElementStateReturn ret = GST_STATE_SUCCESS;
/* element check */
ident = GST_SPIDER_IDENTITY (element);
g_return_val_if_fail (ident != NULL, GST_STATE_FAILURE);
g_return_val_if_fail (GST_IS_SPIDER_IDENTITY (ident), GST_STATE_FAILURE);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_PAUSED_TO_READY:
gst_caps_replace (&ident->caps, NULL);
break;
case GST_STATE_PAUSED_TO_PLAYING:
/* autoplugger check */
spider = GST_SPIDER (GST_ELEMENT_PARENT (ident));
g_return_val_if_fail (spider != NULL, GST_STATE_FAILURE);
g_return_val_if_fail (GST_IS_SPIDER (spider), GST_STATE_FAILURE);
/* start typefinding or plugging */
if ((GST_RPAD_PEER (ident->sink) != NULL)
&& (GST_RPAD_PEER (ident->src) == NULL)) {
GstCaps *caps =
gst_pad_get_caps ((GstPad *) GST_PAD_PEER (ident->sink));
if (gst_caps_is_any (caps) || gst_caps_is_empty (caps)) {
gst_spider_identity_start_type_finding (ident);
gst_caps_free (caps);
break;
} else {
gst_spider_identity_plug (ident);
}
gst_caps_free (caps);
}
/* autoplug on src */
if ((GST_RPAD_PEER (ident->src) != NULL)
&& (GST_RPAD_PEER (ident->sink) == NULL)) {
gst_spider_identity_plug (ident);
}
default:
break;
}
if ((ret != GST_STATE_FAILURE)
&& (GST_ELEMENT_CLASS (parent_class)->change_state))
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element);
return ret;
}
static void
gst_spider_identity_start_type_finding (GstSpiderIdentity * ident)
{
/* GstElement* typefind;
gchar *name;*/
gboolean restart = FALSE;
GST_DEBUG ("element %s starts typefinding", GST_ELEMENT_NAME (ident));
if (GST_STATE (GST_ELEMENT_PARENT (ident)) == GST_STATE_PLAYING) {
gst_element_set_state (GST_ELEMENT (GST_ELEMENT_PARENT (ident)),
GST_STATE_PAUSED);
restart = TRUE;
}
gst_element_set_loop_function (GST_ELEMENT (ident), (GstElementLoopFunction)
GST_DEBUG_FUNCPTR (gst_spider_identity_sink_loop_type_finding));
if (restart) {
gst_element_set_state (GST_ELEMENT (GST_ELEMENT_PARENT (ident)),
GST_STATE_PLAYING);
}
}
/* since we can't set the loop function to NULL if there's a cothread for us,
* we have to use a dumb one
*/
static void
gst_spider_identity_dumb_loop (GstSpiderIdentity * ident)
{
GstBuffer *buf;
g_return_if_fail (ident != NULL);
g_return_if_fail (GST_IS_SPIDER_IDENTITY (ident));
g_assert (ident->sink != NULL);
buf = GST_BUFFER (gst_pad_pull (ident->sink));
gst_spider_identity_chain (ident->sink, buf);
}
/* do nothing until we're linked - then disable yourself
*/
static void
gst_spider_identity_src_loop (GstSpiderIdentity * ident)
{
/* checks - disable for speed */
g_return_if_fail (ident != NULL);
g_return_if_fail (GST_IS_SPIDER_IDENTITY (ident));
/* we don't want a loop function if we're plugged */
if (ident->sink && GST_PAD_PEER (ident->sink)) {
gst_element_set_loop_function (GST_ELEMENT (ident), (GstElementLoopFunction)
GST_DEBUG_FUNCPTR (gst_spider_identity_dumb_loop));
gst_spider_identity_dumb_loop (ident);
return;
}
gst_element_interrupt (GST_ELEMENT (ident));
}
/* This loop function is only needed when typefinding.
*/
typedef struct
{
GstBuffer *buffer;
guint best_probability;
GstCaps *caps;
}
SpiderTypeFind;
guint8 *
spider_find_peek (gpointer data, gint64 offset, guint size)
{
SpiderTypeFind *find = (SpiderTypeFind *) data;
gint64 buffer_offset = GST_BUFFER_OFFSET_IS_VALID (find->buffer) ?
GST_BUFFER_OFFSET (find->buffer) : 0;
if (offset >= buffer_offset
&& offset + size <= buffer_offset + GST_BUFFER_SIZE (find->buffer)) {
GST_LOG ("peek %" G_GINT64_FORMAT ", %u successful", offset, size);
return GST_BUFFER_DATA (find->buffer) + offset - buffer_offset;
} else {
GST_LOG ("peek %" G_GINT64_FORMAT ", %u failed", offset, size);
return NULL;
}
}
static void
spider_find_suggest (gpointer data, guint probability, const GstCaps * caps)
{
SpiderTypeFind *find = (SpiderTypeFind *) data;
GST_INFO ("suggest %u, %" GST_PTR_FORMAT, probability, caps);
if (probability > find->best_probability) {
gst_caps_replace (&find->caps, gst_caps_copy (caps));
find->best_probability = probability;
}
}
static void
gst_spider_identity_sink_loop_type_finding (GstSpiderIdentity * ident)
{
GstData *data;
GstTypeFind gst_find;
SpiderTypeFind find;
GList *walk, *type_list = NULL;
g_return_if_fail (GST_IS_SPIDER_IDENTITY (ident));
data = gst_pad_pull (ident->sink);
if (!GST_IS_BUFFER (data)) {
gst_spider_identity_chain (ident->sink, GST_BUFFER (data));
return;
}
find.buffer = GST_BUFFER (data);
/* maybe there are already valid caps now? */
find.caps = gst_pad_get_allowed_caps (ident->sink);
if (!gst_caps_is_empty (find.caps) && !gst_caps_is_any (find.caps)) {
goto plug;
} else {
gst_caps_free (find.caps);
find.caps = NULL;
}
/* now do the actual typefinding with the supplied buffer */
walk = type_list = gst_type_find_factory_get_list ();
find.best_probability = 0;
find.caps = NULL;
gst_find.data = &find;
gst_find.peek = spider_find_peek;
gst_find.suggest = spider_find_suggest;
while (walk) {
GstTypeFindFactory *factory = GST_TYPE_FIND_FACTORY (walk->data);
GST_DEBUG ("trying typefind function %s",
GST_PLUGIN_FEATURE_NAME (factory));
gst_type_find_factory_call_function (factory, &gst_find);
if (find.best_probability >= GST_TYPE_FIND_MAXIMUM)
goto plug;
walk = g_list_next (walk);
}
if (find.best_probability > 0)
goto plug;
GST_ELEMENT_ERROR (ident, STREAM, TYPE_NOT_FOUND, (NULL), (NULL));
find.buffer = GST_BUFFER (gst_event_new (GST_EVENT_EOS));
end:
/* remove loop function */
gst_element_set_loop_function (GST_ELEMENT (ident), (GstElementLoopFunction)
GST_DEBUG_FUNCPTR (gst_spider_identity_dumb_loop));
/* push the buffer */
gst_spider_identity_chain (ident->sink, find.buffer);
return;
plug:
GST_INFO ("typefind function found caps");
ident->caps = find.caps;
if (GST_PAD_IS_LINKED (ident->src)) {
GstPadLinkReturn ret;
ret = gst_pad_try_set_caps (ident->src, find.caps);
if (GST_PAD_LINK_FAILED (ret)) {
g_critical ("could not set caps on spideridentity src pad\n");
}
}
GST_LOG_OBJECT (ident, "spider starting caps: %" GST_PTR_FORMAT, find.caps);
if (type_list)
g_list_free (type_list);
gst_spider_identity_plug (ident);
goto end;
}
static gboolean
gst_spider_identity_handle_src_event (GstPad * pad, GstEvent * event)
{
gboolean res = TRUE;
GstSpiderIdentity *ident;
GST_DEBUG ("spider_identity src_event");
ident = GST_SPIDER_IDENTITY (gst_pad_get_parent (pad));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH:
case GST_EVENT_SEEK:
default:
res = gst_pad_event_default (pad, event);
break;
}
return res;
}