#define YYLTYPE_IS_TRIVIAL 0
#endif
+/*******************************************************************************************
+*** Tracing memory leaks
+*******************************************************************************************/
+
#ifdef __GST_PARSE_TRACE
static guint __strings;
static guint __links;
__strings--;
}
}
-link_t *__gst_parse_link_new ()
+link_t *__gst_parse_link_new (void)
{
link_t *ret;
__links++;
}
}
chain_t *
-__gst_parse_chain_new ()
+__gst_parse_chain_new (void)
{
chain_t *ret;
__chains++;
ret = g_slice_new0 (chain_t);
- /* g_print ("ALLOCATED CHAIN (%3u): %p\n", __chains, ret); */
+ //g_print ("@%p: ALLOCATED CHAIN (%3u):\n", ret, __chains);
return ret;
}
void
__gst_parse_chain_free (chain_t *data)
{
- /* g_print ("FREEING CHAIN (%3u): %p\n", __chains - 1, data); */
+ //g_print ("@%p: FREEING CHAIN (%3u):\n", data, __chains - 1);
g_slice_free (chain_t, data);
g_return_if_fail (__chains > 0);
__chains--;
#endif /* __GST_PARSE_TRACE */
-typedef struct {
- gchar *src_pad;
- gchar *sink_pad;
- GstElement *sink;
- GstCaps *caps;
- gulong signal_id;
-} DelayedLink;
-
-typedef struct {
- gchar *name;
- gchar *value_str;
- gulong signal_id;
-} DelayedSet;
-
-/*** define SET_ERROR macro/function */
-
+/*******************************************************************************************
+*** define SET_ERROR macro/function
+*******************************************************************************************/
#ifdef G_HAVE_ISO_VARARGS
# define SET_ERROR(error, type, ...) \
#include "grammar.tab.h"
#include "parse_lex.h"
+/*******************************************************************************************
+*** report missing elements/bins/..
+*******************************************************************************************/
-#define ADD_MISSING_ELEMENT(graph,name) G_STMT_START { \
- if ((graph)->ctx) { \
- (graph)->ctx->missing_elements = \
- g_list_append ((graph)->ctx->missing_elements, g_strdup (name)); \
- } } G_STMT_END
-static void
-no_free (gconstpointer foo)
-{
- /* do nothing */
+static void add_missing_element(graph_t *graph,gchar *name){
+ if ((graph)->ctx){
+ (graph)->ctx->missing_elements = g_list_append ((graph)->ctx->missing_elements, g_strdup (name));
+ }
}
-#define GST_BIN_MAKE(res, type, chainval, assign, type_string_free_func) \
-G_STMT_START { \
- chain_t *chain = chainval; \
- GSList *walk; \
- GstBin *bin = (GstBin *) gst_element_factory_make (type, NULL); \
- if (!chain) { \
- SET_ERROR (graph->error, GST_PARSE_ERROR_EMPTY_BIN, \
- _("specified empty bin \"%s\", not allowed"), type); \
- g_slist_foreach (assign, (GFunc) gst_parse_strfree, NULL); \
- g_slist_free (assign); \
- gst_object_unref (bin); \
- type_string_free_func (type); /* Need to clean up the string */ \
- YYERROR; \
- } else if (!bin) { \
- ADD_MISSING_ELEMENT(graph, type); \
- SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT, \
- _("no bin \"%s\", skipping"), type); \
- g_slist_foreach (assign, (GFunc) gst_parse_strfree, NULL); \
- g_slist_free (assign); \
- res = chain; \
- } else { \
- for (walk = chain->elements; walk; walk = walk->next ) \
- gst_bin_add (bin, GST_ELEMENT (walk->data)); \
- g_slist_free (chain->elements); \
- chain->elements = g_slist_prepend (NULL, bin); \
- res = chain; \
- /* set the properties now */ \
- for (walk = assign; walk; walk = walk->next) \
- gst_parse_element_set ((gchar *) walk->data, GST_ELEMENT (bin), graph); \
- g_slist_free (assign); \
- } \
-} G_STMT_END
-#define MAKE_LINK(link, _src, _src_name, _src_pads, _sink, _sink_name, _sink_pads) \
-G_STMT_START { \
- link = gst_parse_link_new (); \
- link->src = _src; \
- link->sink = _sink; \
- link->src_name = _src_name; \
- link->sink_name = _sink_name; \
- link->src_pads = _src_pads; \
- link->sink_pads = _sink_pads; \
- link->caps = NULL; \
+/*******************************************************************************************
+*** helpers for pipeline-setup
+*******************************************************************************************/
+
+#define TRY_SETUP_LINK(l) G_STMT_START { \
+ if( (!(l)->src.element) && (!(l)->src.name) ){ \
+ SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link has no source [sink=%s@%p]"), \
+ (l)->sink.name ? (l)->sink.name : _(""), \
+ (l)->sink.element); \
+ gst_parse_free_link (l); \
+ }else if( (!(l)->sink.element) && (!(l)->sink.name) ){ \
+ SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link has no sink [source=%s@%p]"), \
+ (l)->src.name ? (l)->src.name :_(""), \
+ (l)->src.element); \
+ gst_parse_free_link (l); \
+ }else{ \
+ graph->links = g_slist_prepend (graph->links, l ); \
+ } \
} G_STMT_END
-#define MAKE_REF(link, _src, _pads) \
-G_STMT_START { \
- gchar *padname = _src; \
- GSList *pads = _pads; \
- if (padname) { \
- while (*padname != '.') padname++; \
- *padname = '\0'; \
- padname++; \
- if (*padname != '\0') \
- pads = g_slist_prepend (pads, gst_parse_strdup (padname)); \
- } \
- MAKE_LINK (link, NULL, _src, pads, NULL, NULL, NULL); \
-} G_STMT_END
+typedef struct {
+ gchar *src_pad;
+ gchar *sink_pad;
+ GstElement *sink;
+ GstCaps *caps;
+ gulong signal_id;
+} DelayedLink;
-static void
-gst_parse_free_delayed_set (DelayedSet *set)
+typedef struct {
+ gchar *name;
+ gchar *value_str;
+ gulong signal_id;
+} DelayedSet;
+
+static int gst_resolve_reference(reference_t *rr, GstElement *pipeline){
+ GstBin *bin;
+
+ if(rr->element) return 0; /* already resolved! */
+ if(!rr->name) return -2; /* no chance! */
+
+ if (GST_IS_BIN (pipeline)){
+ bin = GST_BIN (pipeline);
+ rr->element = gst_bin_get_by_name_recurse_up (bin, rr->name);
+ } else {
+ rr->element = strcmp (GST_ELEMENT_NAME (pipeline), rr->name) == 0 ?
+ gst_object_ref(pipeline) : NULL;
+ }
+ if(rr->element) return 0; /* resolved */
+ else return -1; /* not found */
+}
+
+static void gst_parse_free_delayed_set (DelayedSet *set)
{
g_free(set->name);
g_free(set->value_str);
static void gst_parse_new_child(GstChildProxy *child_proxy, GObject *object,
const gchar * name, gpointer data);
-static void
-gst_parse_add_delayed_set (GstElement *element, gchar *name, gchar *value_str)
+static void gst_parse_add_delayed_set (GstElement *element, gchar *name, gchar *value_str)
{
DelayedSet *data = g_slice_new0 (DelayedSet);
}
}
-static void
-gst_parse_new_child(GstChildProxy *child_proxy, GObject *object,
+static void gst_parse_new_child(GstChildProxy *child_proxy, GObject *object,
const gchar * name, gpointer data)
{
DelayedSet *set = (DelayedSet *) data;
goto out;
}
-static void
-gst_parse_element_set (gchar *value, GstElement *element, graph_t *graph)
+static void gst_parse_element_set (gchar *value, GstElement *element, graph_t *graph)
{
GParamSpec *pspec = NULL;
gchar *pos = value;
goto out;
}
-static inline void
-gst_parse_free_link (link_t *link)
+static void gst_parse_free_reference (reference_t *rr)
{
- gst_parse_strfree (link->src_name);
- gst_parse_strfree (link->sink_name);
- g_slist_foreach (link->src_pads, (GFunc) gst_parse_strfree, NULL);
- g_slist_foreach (link->sink_pads, (GFunc) gst_parse_strfree, NULL);
- g_slist_free (link->src_pads);
- g_slist_free (link->sink_pads);
+ if(rr->element) gst_object_unref(rr->element);
+ gst_parse_strfree (rr->name);
+ g_slist_foreach (rr->pads, (GFunc) gst_parse_strfree, NULL);
+ g_slist_free (rr->pads);
+}
+
+static void gst_parse_free_link (link_t *link)
+{
+ gst_parse_free_reference (&(link->src));
+ gst_parse_free_reference (&(link->sink));
if (link->caps) gst_caps_unref (link->caps);
gst_parse_link_free (link);
}
-static void
-gst_parse_free_delayed_link (DelayedLink *link)
+static void gst_parse_free_chain (chain_t *ch)
+{
+ GSList *walk;
+ gst_parse_free_reference (&(ch->first));
+ gst_parse_free_reference (&(ch->last));
+ for(walk=ch->elements;walk;walk=walk->next)
+ gst_object_unref (walk->data);
+ g_slist_free (ch->elements);
+ gst_parse_chain_free (ch);
+}
+
+static void gst_parse_free_delayed_link (DelayedLink *link)
{
g_free (link->src_pad);
g_free (link->sink_pad);
g_slice_free (DelayedLink, link);
}
-static void
-gst_parse_found_pad (GstElement *src, GstPad *pad, gpointer data)
+static void gst_parse_found_pad (GstElement *src, GstPad *pad, gpointer data)
{
DelayedLink *link = data;
static gint
gst_parse_perform_link (link_t *link, graph_t *graph)
{
- GstElement *src = link->src;
- GstElement *sink = link->sink;
- GSList *srcs = link->src_pads;
- GSList *sinks = link->sink_pads;
+ GstElement *src = link->src.element;
+ GstElement *sink = link->sink.element;
+ GSList *srcs = link->src.pads;
+ GSList *sinks = link->sink.pads;
g_assert (GST_IS_ELEMENT (src));
g_assert (GST_IS_ELEMENT (sink));
GST_CAT_INFO (GST_CAT_PIPELINE,
"linking %s:%s to %s:%s (%u/%u) with caps \"%" GST_PTR_FORMAT "\"",
- GST_ELEMENT_NAME (src), link->src_name ? link->src_name : "(any)",
- GST_ELEMENT_NAME (sink), link->sink_name ? link->sink_name : "(any)",
+ GST_ELEMENT_NAME (src), link->src.name ? link->src.name : "(any)",
+ GST_ELEMENT_NAME (sink), link->sink.name ? link->sink.name : "(any)",
g_slist_length (srcs), g_slist_length (sinks), link->caps);
if (!srcs || !sinks) {
}
}
}
- if (g_slist_length (link->src_pads) != g_slist_length (link->sink_pads)) {
+ if (g_slist_length (link->src.pads) != g_slist_length (link->sink.pads)) {
goto error;
}
while (srcs && sinks) {
%}
%union {
- gchar *s;
- chain_t *c;
- link_t *l;
- GstElement *e;
- GSList *p;
- graph_t *g;
+ gchar *ss;
+ chain_t *cc;
+ link_t *ll;
+ reference_t rr;
+ GstElement *ee;
+ GSList *pp;
+ graph_t *gg;
}
-%token <s> PARSE_URL
-%token <s> IDENTIFIER
-%left <s> REF PADREF BINREF
-%token <s> ASSIGNMENT
-%token <s> LINK
+%token <ss> PARSE_URL
+%token <ss> IDENTIFIER
+%left <ss> REF PADREF BINREF
+%token <ss> ASSIGNMENT
+%token <ss> LINK
+
+%type <ss> binopener
+%type <gg> graph
+%type <cc> chain bin chainlist openchain elementary
+%type <rr> reference
+%type <ll> link
+%type <ee> element
+%type <pp> morepads pads assignments
+
+%destructor { gst_parse_strfree ($$); } <ss>
+%destructor { gst_parse_free_chain($$); } <cc>
+%destructor { gst_parse_free_link ($$); } <ll>
+%destructor { gst_parse_free_reference(&($$));} <rr>
+%destructor { gst_object_unref ($$); } <ee>
+%destructor { GSList *walk;
+ for(walk=$$;walk;walk=walk->next)
+ gst_parse_strfree (walk->data);
+ g_slist_free ($$); } <pp>
+
-%type <g> graph
-%type <c> chain bin
-%type <l> reference
-%type <l> linkpart link
-%type <p> linklist
-%type <e> element
-%type <p> padlist pads assignments
%left '(' ')'
%left ','
%start graph
%%
+/*************************************************************
+* Grammar explanation:
+* _element_s are specified by an identifier of their type.
+* a name can be give in the optional property-assignments
+* coffeeelement
+* fakesrc name=john
+* identity silence=false name=frodo
+* (cont'd)
+**************************************************************/
element: IDENTIFIER { $$ = gst_element_factory_make ($1, NULL);
if ($$ == NULL) {
- ADD_MISSING_ELEMENT (graph, $1);
+ add_missing_element(graph, $1);
SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT, _("no element \"%s\""), $1);
- /* if FATAL_ERRORS flag is set, we don't have to worry about backwards
- * compatibility and can continue parsing and check for other missing
- * elements */
- if ((graph->flags & GST_PARSE_FLAG_FATAL_ERRORS) == 0) {
- gst_parse_strfree ($1);
- YYERROR;
- }
}
gst_parse_strfree ($1);
}
$$ = $1;
}
;
-assignments: /* NOP */ { $$ = NULL; }
- | assignments ASSIGNMENT { $$ = g_slist_prepend ($1, $2); }
+
+/*************************************************************
+* Grammar explanation: (cont'd)
+* a graph has (pure) _element_s, _bin_s and _link_s.
+* since bins are special elements, bins and elements can
+* be generalized as _elementary_.
+* The construction of _bin_s will be discussed later.
+* (cont'd)
+*
+**************************************************************/
+elementary:
+ element { $$ = gst_parse_chain_new ();
+ //g_print ("@%p: CHAINing elementary\n", $$);
+ $$->first.element = $1? gst_object_ref($1) : NULL;
+ $$->last.element = $1? gst_object_ref($1) : NULL;
+ $$->first.name = $$->last.name = NULL;
+ $$->first.pads = $$->last.pads = NULL;
+ $$->elements = $1 ? g_slist_prepend (NULL, $1) : NULL;
+ }
+ | bin { $$=$1; }
;
-bin: '(' assignments chain ')' { GST_BIN_MAKE ($$, "bin", $3, $2, no_free); }
- | BINREF assignments chain ')' { GST_BIN_MAKE ($$, $1, $3, $2, gst_parse_strfree);
- gst_parse_strfree ($1);
+
+/*************************************************************
+* Grammar explanation: (cont'd)
+* a _chain_ is a list of _elementary_s that have _link_s inbetween
+* which are represented through infix-notation.
+*
+* fakesrc ! sometransformation ! fakesink
+*
+* every _link_ can be augmented with _pads_.
+*
+* coffeesrc .sound ! speakersink
+* multisrc .movie,ads ! .projector,smallscreen multisink
+*
+* and every _link_ can be setup to filter media-types
+* mediasrc ! audio/x-raw, signed=TRUE ! stereosink
+*
+* User HINT:
+* if the lexer does not recognize your media-type it
+* will make it an element name. that results in errors
+* like
+* NO SUCH ELEMENT: no element audio7x-raw
+* '7' vs. '/' in https://en.wikipedia.org/wiki/QWERTZ
+*
+* Parsing HINT:
+* in the parser we need to differ between chains that can
+* be extended by more elementaries (_openchain_) and others
+* that are syntactically closed (handled later in this file).
+* (e.g. fakesrc ! sinkreferencename.padname)
+**************************************************************/
+chain: openchain { $$=$1;
+ if($$->last.name){
+ SET_ERROR (graph->error, GST_PARSE_ERROR_SYNTAX,
+ _("unexpected reference \"%s\" - ignoring"), $$->last.name);
+ gst_parse_strfree($$->last.name);
+ $$->last.name=NULL;
+ }
+ if($$->last.pads){
+ SET_ERROR (graph->error, GST_PARSE_ERROR_SYNTAX,
+ _("unexpected pad-reference \"%s\" - ignoring"), (gchar*)$$->last.pads->data);
+ g_slist_foreach ($$->last.pads, (GFunc) gst_parse_strfree, NULL);
+ g_slist_free ($$->last.pads);
+ $$->last.pads=NULL;
+ }
}
- | BINREF assignments ')' { GST_BIN_MAKE ($$, $1, NULL, $2, gst_parse_strfree);
- gst_parse_strfree ($1);
+ ;
+
+openchain:
+ elementary pads { $$=$1;
+ $$->last.pads = g_slist_concat ($$->last.pads, $2);
+ //g_print ("@%p@%p: FKI elementary pads\n", $1, $$->last.pads);
}
- | BINREF assignments error ')' { GST_BIN_MAKE ($$, $1, NULL, $2, gst_parse_strfree);
- gst_parse_strfree ($1);
+ | openchain link pads elementary pads
+ {
+ $2->src = $1->last;
+ $2->sink = $4->first;
+ $2->sink.pads = g_slist_concat ($3, $2->sink.pads);
+ TRY_SETUP_LINK($2);
+ $4->first = $1->first;
+ $4->elements = g_slist_concat ($1->elements, $4->elements);
+ gst_parse_chain_free($1);
+ $$ = $4;
+ $$->last.pads = g_slist_concat ($$->last.pads, $5);
}
+
;
-pads: PADREF { $$ = g_slist_prepend (NULL, $1); }
- | PADREF padlist { $$ = $2;
- $$ = g_slist_prepend ($$, $1);
+link: LINK { $$ = gst_parse_link_new ();
+ $$->src.element = NULL;
+ $$->sink.element = NULL;
+ $$->src.name = NULL;
+ $$->sink.name = NULL;
+ $$->src.pads = NULL;
+ $$->sink.pads = NULL;
+ $$->caps = NULL;
+ if ($1) {
+ $$->caps = gst_caps_from_string ($1);
+ if ($$->caps == NULL)
+ SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("could not parse caps \"%s\""), $1);
+ gst_parse_strfree ($1);
+ }
}
;
-padlist: ',' IDENTIFIER { $$ = g_slist_prepend (NULL, $2); }
- | ',' IDENTIFIER padlist { $$ = g_slist_prepend ($3, $2); }
+pads: /* NOP */ { $$ = NULL; }
+ | PADREF morepads { $$ = $2;
+ $$ = g_slist_prepend ($$, $1);
+ }
;
-
-reference: REF { MAKE_REF ($$, $1, NULL); }
- | REF padlist { MAKE_REF ($$, $1, $2); }
+morepads: /* NOP */ { $$ = NULL; }
+ | ',' IDENTIFIER morepads { $$ = g_slist_prepend ($3, $2); }
;
-linkpart: reference { $$ = $1; }
- | pads { MAKE_REF ($$, NULL, $1); }
- | /* NOP */ { MAKE_REF ($$, NULL, NULL); }
+/*************************************************************
+* Grammar explanation: (cont'd)
+* the first and last elements of a _chain_ can be give
+* as URL. This creates special elements that fit the URL.
+*
+* fakesrc ! http://fake-sink.org
+* http://somesource.org ! fakesink
+**************************************************************/
+
+chain: openchain link PARSE_URL { GstElement *element =
+ gst_element_make_from_uri (GST_URI_SINK, $3, NULL, NULL);
+ /* FIXME: get and parse error properly */
+ if (!element) {
+ SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
+ _("no sink element for URI \"%s\""), $3);
+ }
+ $$ = $1;
+ $2->sink.element = element?gst_object_ref(element):NULL;
+ $2->src = $1->last;
+ TRY_SETUP_LINK($2);
+ $$->last.element = NULL;
+ $$->last.name = NULL;
+ $$->last.pads = NULL;
+ if(element) $$->elements = g_slist_append ($$->elements, element);
+ g_free ($3);
+ }
;
-
-link: linkpart LINK linkpart { $$ = $1;
- if ($2) {
- $$->caps = gst_caps_from_string ($2);
- if ($$->caps == NULL)
- SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("could not parse caps \"%s\""), $2);
- gst_parse_strfree ($2);
+openchain:
+ PARSE_URL { GstElement *element =
+ gst_element_make_from_uri (GST_URI_SRC, $1, NULL, NULL);
+ /* FIXME: get and parse error properly */
+ if (!element) {
+ SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
+ _("no source element for URI \"%s\""), $1);
}
- $$->sink_name = $3->src_name;
- $$->sink_pads = $3->src_pads;
- gst_parse_link_free ($3);
+ $$ = gst_parse_chain_new ();
+ //g_print ("@%p: CHAINing srcURL\n", $$);
+ $$->first.element = NULL;
+ $$->first.name = NULL;
+ $$->first.pads = NULL;
+ $$->last.element = element ? gst_object_ref(element):NULL;
+ $$->last.name = NULL;
+ $$->last.pads = NULL;
+ $$->elements = element ? g_slist_prepend (NULL, element) : NULL;
+ g_free($1);
}
;
-linklist: link { $$ = g_slist_prepend (NULL, $1); }
- | link linklist { $$ = g_slist_prepend ($2, $1); }
- | linklist error { $$ = $1; }
- ;
-chain: element { $$ = gst_parse_chain_new ();
- $$->first = $$->last = $1;
- $$->front = $$->back = NULL;
- $$->elements = g_slist_prepend (NULL, $1);
+/*************************************************************
+* Grammar explanation: (cont'd)
+* the first and last elements of a _chain_ can be linked
+* to a named _reference_ (with optional pads).
+*
+* fakesrc ! nameOfSinkElement.
+* fakesrc ! nameOfSinkElement.Padname
+* fakesrc ! nameOfSinkElement.Padname, anotherPad
+* nameOfSource.Padname ! fakesink
+**************************************************************/
+
+chain: openchain link reference { $$ = $1;
+ $2->sink= $3;
+ $2->src = $1->last;
+ TRY_SETUP_LINK($2);
+ $$->last.element = NULL;
+ $$->last.name = NULL;
+ $$->last.pads = NULL;
}
- | bin { $$ = $1; }
- | chain chain { if ($1->back && $2->front) {
- if (!$1->back->sink_name) {
- SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
- gst_parse_free_link ($1->back);
- } else {
- graph->links = g_slist_prepend (graph->links, $1->back);
- }
- if (!$2->front->src_name) {
- SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without sink element"));
- gst_parse_free_link ($2->front);
- } else {
- graph->links = g_slist_prepend (graph->links, $2->front);
- }
- $1->back = NULL;
- } else if ($1->back) {
- if (!$1->back->sink_name) {
- $1->back->sink = $2->first;
- }
- } else if ($2->front) {
- if (!$2->front->src_name) {
- $2->front->src = $1->last;
- }
- $1->back = $2->front;
- }
+ ;
- if ($1->back) {
- graph->links = g_slist_prepend (graph->links, $1->back);
- }
- $1->last = $2->last;
- $1->back = $2->back;
- $1->elements = g_slist_concat ($1->elements, $2->elements);
- if ($2)
- gst_parse_chain_free ($2);
- $$ = $1;
+
+openchain:
+ reference { $$ = gst_parse_chain_new ();
+ $$->last=$1;
+ $$->first.element = NULL;
+ $$->first.name = NULL;
+ $$->first.pads = NULL;
+ $$->elements = NULL;
}
- | chain linklist { GSList *walk;
- if ($1->back) {
- $2 = g_slist_prepend ($2, $1->back);
- $1->back = NULL;
- } else {
- if (!((link_t *) $2->data)->src_name) {
- ((link_t *) $2->data)->src = $1->last;
- }
- }
- for (walk = $2; walk; walk = walk->next) {
- link_t *link = (link_t *) walk->data;
- if (!link->sink_name && walk->next) {
- SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without sink element"));
- gst_parse_free_link (link);
- } else if (!link->src_name && !link->src) {
- SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
- gst_parse_free_link (link);
- } else {
- if (walk->next) {
- graph->links = g_slist_prepend (graph->links, link);
- } else {
- $1->back = link;
- }
- }
+ ;
+reference: REF morepads {
+ gchar *padname = $1;
+ GSList *pads = $2;
+ if (padname) {
+ while (*padname != '.') padname++;
+ *padname = '\0';
+ padname++;
+ if (*padname != '\0')
+ pads = g_slist_prepend (pads, gst_parse_strdup (padname));
}
- g_slist_free ($2);
- $$ = $1;
+ $$.element=NULL;
+ $$.name=$1;
+ $$.pads=pads;
}
- | chain error { $$ = $1; }
- | link chain { if ($2->front) {
- if (!$2->front->src_name) {
- SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
- gst_parse_free_link ($2->front);
- } else {
- graph->links = g_slist_prepend (graph->links, $2->front);
- }
- }
- if (!$1->sink_name) {
- $1->sink = $2->first;
+ ;
+
+
+/*************************************************************
+* Grammar explanation: (cont'd)
+* a _chainlist_ is just a list of _chain_s.
+*
+* You can specify _link_s with named
+* _reference_ on each side. That
+* works already after the explanations above.
+* someSourceName.Pad ! someSinkName.
+* someSourceName.Pad,anotherPad ! someSinkName.Apad,Bpad
+*
+* If a syntax error occurs, the already finished _chain_s
+* and _links_ are kept intact.
+*************************************************************/
+
+chainlist: /* NOP */ { $$ = NULL; }
+ | chainlist chain { if ($1){
+ gst_parse_free_reference(&($1->last));
+ gst_parse_free_reference(&($2->first));
+ $2->first = $1->first;
+ $2->elements = g_slist_concat ($1->elements, $2->elements);
+ gst_parse_chain_free ($1);
}
- $2->front = $1;
$$ = $2;
}
- | PARSE_URL chain { $$ = $2;
- if ($$->front) {
- GstElement *element =
- gst_element_make_from_uri (GST_URI_SRC, $1, NULL, NULL);
- /* FIXME: get and parse error properly */
- if (!element) {
- SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
- _("no source element for URI \"%s\""), $1);
- } else {
- $$->front->src = element;
- graph->links = g_slist_prepend (
- graph->links, $$->front);
- $$->front = NULL;
- $$->elements = g_slist_prepend ($$->elements, element);
- }
- } else {
- SET_ERROR (graph->error, GST_PARSE_ERROR_LINK,
- _("no element to link URI \"%s\" to"), $1);
- }
- g_free ($1);
+ | chainlist error { $$=$1;
+ GST_CAT_DEBUG (GST_CAT_PIPELINE,"trying to recover from syntax error");
+ SET_ERROR (graph->error, GST_PARSE_ERROR_SYNTAX, _("syntax error"));
}
- | link PARSE_URL { GstElement *element =
- gst_element_make_from_uri (GST_URI_SINK, $2, NULL, NULL);
- /* FIXME: get and parse error properly */
- if (!element) {
+ ;
+
+/*************************************************************
+* Grammar explanation: (cont'd)
+* _bins_
+*************************************************************/
+
+
+assignments: /* NOP */ { $$ = NULL; }
+ | assignments ASSIGNMENT { $$ = g_slist_prepend ($1, $2); }
+ ;
+
+binopener: '(' { $$ = gst_parse_strdup(_("bin")); }
+ | BINREF { $$ = $1; }
+ ;
+bin: binopener assignments chainlist ')' {
+ chain_t *chain = $3;
+ GSList *walk;
+ GstBin *bin = (GstBin *) gst_element_factory_make ($1, NULL);
+ if (!chain) {
+ SET_ERROR (graph->error, GST_PARSE_ERROR_EMPTY_BIN,
+ _("specified empty bin \"%s\", not allowed"), $1);
+ chain = gst_parse_chain_new ();
+ chain->first.element = chain->last.element = NULL;
+ chain->first.name = chain->last.name = NULL;
+ chain->first.pads = chain->last.pads = NULL;
+ chain->elements = NULL;
+ }
+ if (!bin) {
+ add_missing_element(graph, $1);
SET_ERROR (graph->error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
- _("no sink element for URI \"%s\""), $2);
- gst_parse_link_free ($1);
- g_free ($2);
- YYERROR;
- } else if ($1->sink_name || $1->sink_pads) {
- gst_object_unref (element);
- SET_ERROR (graph->error, GST_PARSE_ERROR_LINK,
- _("could not link sink element for URI \"%s\""), $2);
- gst_parse_link_free ($1);
- g_free ($2);
- YYERROR;
+ _("no bin \"%s\", unpacking elements"), $1);
+ /* clear property-list */
+ g_slist_foreach ($2, (GFunc) gst_parse_strfree, NULL);
+ g_slist_free ($2);
+ $2 = NULL;
} else {
- $$ = gst_parse_chain_new ();
- $$->first = $$->last = element;
- $$->front = $1;
- $$->front->sink = element;
- $$->elements = g_slist_prepend (NULL, element);
+ for (walk = chain->elements; walk; walk = walk->next )
+ gst_bin_add (bin, GST_ELEMENT (walk->data));
+ g_slist_free (chain->elements);
+ chain->elements = g_slist_prepend (NULL, bin);
}
- g_free ($2);
+ $$ = chain;
+ /* set the properties now
+ * HINT: property-list cleared above, if bin==NULL
+ */
+ for (walk = $2; walk; walk = walk->next)
+ gst_parse_element_set ((gchar *) walk->data,
+ GST_ELEMENT (bin), graph);
+ g_slist_free ($2);
+ gst_parse_strfree ($1);
}
;
-graph: /* NOP */ { SET_ERROR (graph->error, GST_PARSE_ERROR_EMPTY, _("empty pipeline not allowed"));
- $$ = graph;
- }
- | chain { $$ = graph;
- if ($1->front) {
- if (!$1->front->src_name) {
- SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without source element"));
- gst_parse_free_link ($1->front);
- } else {
- $$->links = g_slist_prepend ($$->links, $1->front);
- }
- $1->front = NULL;
- }
- if ($1->back) {
- if (!$1->back->sink_name) {
- SET_ERROR (graph->error, GST_PARSE_ERROR_LINK, _("link without sink element"));
- gst_parse_free_link ($1->back);
- } else {
- $$->links = g_slist_prepend ($$->links, $1->back);
- }
- $1->back = NULL;
- }
+
+/*************************************************************
+* Grammar explanation: (cont'd)
+* _graph_
+*************************************************************/
+
+graph: chainlist { $$ = graph;
$$->chain = $1;
+ if(!$1) {
+ SET_ERROR (graph->error, GST_PARSE_ERROR_EMPTY, _("empty pipeline not allowed"));
+ }
}
;
__strings = __chains = __links = 0;
#endif /* __GST_PARSE_TRACE */
+ //g_print("Now scanning: %s\n", str);
+
dstr = g_strdup (str);
priv_gst_parse_yylex_init (&scanner);
priv_gst_parse_yy_scan_string (dstr, scanner);
g.chain ? g_slist_length (g.chain->elements) : 0,
g_slist_length (g.links));
- if (!g.chain) {
- ret = NULL;
- } else if (!g.chain->elements->next) {
- /* only one toplevel element */
- ret = (GstElement *) g.chain->elements->data;
- g_slist_free (g.chain->elements);
- if (GST_IS_BIN (ret))
- bin = GST_BIN (ret);
- gst_parse_chain_free (g.chain);
- } else {
- /* put all elements in our bin */
+ /* ensure chain is not NULL */
+ if (!g.chain){
+ g.chain=gst_parse_chain_new ();
+ g.chain->elements=NULL;
+ g.chain->first.element=NULL;
+ g.chain->first.name=NULL;
+ g.chain->first.pads=NULL;
+ g.chain->last.element=NULL;
+ g.chain->last.name=NULL;
+ g.chain->last.pads=NULL;
+ };
+
+ /* ensure elements is not empty */
+ if(!g.chain->elements){
+ g.chain->elements= g_slist_prepend (NULL, NULL);
+ };
+
+ /* put all elements in our bin if necessary */
+ if(g.chain->elements->next){
bin = GST_BIN (gst_element_factory_make ("pipeline", NULL));
g_assert (bin);
if (walk->data != NULL)
gst_bin_add (bin, GST_ELEMENT (walk->data));
}
-
g_slist_free (g.chain->elements);
- ret = GST_ELEMENT (bin);
- gst_parse_chain_free (g.chain);
- }
+ g.chain->elements = g_slist_prepend (NULL, bin);
+ }
+
+ ret = (GstElement *) g.chain->elements->data;
+ g_slist_free (g.chain->elements);
+ g.chain->elements=NULL;
+ if (GST_IS_BIN (ret))
+ bin = GST_BIN (ret);
+ gst_parse_free_chain (g.chain);
+ g.chain = NULL;
- /* remove links */
+
+ /* resolve and perform links */
for (walk = g.links; walk; walk = walk->next) {
link_t *l = (link_t *) walk->data;
- if (!l->src) {
- if (l->src_name) {
- if (bin) {
- l->src = gst_bin_get_by_name_recurse_up (bin, l->src_name);
- if (l->src)
- gst_object_unref (l->src);
- } else {
- l->src = strcmp (GST_ELEMENT_NAME (ret), l->src_name) == 0 ? ret : NULL;
- }
- }
- if (!l->src) {
- if (l->src_name) {
+ int err;
+ err=gst_resolve_reference( &(l->src), ret);
+ if (err) {
+ if(-1==err){
SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
- "No element named \"%s\" - omitting link", l->src_name);
- } else {
+ "No src-element named \"%s\" - omitting link", l->src.name);
+ }else{
/* probably a missing element which we've handled already */
- }
- gst_parse_free_link (l);
- continue;
- }
+ SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
+ "No src-element found - omitting link");
+ }
+ gst_parse_free_link (l);
+ continue;
}
- if (!l->sink) {
- if (l->sink_name) {
- if (bin) {
- l->sink = gst_bin_get_by_name_recurse_up (bin, l->sink_name);
- if (l->sink)
- gst_object_unref (l->sink);
- } else {
- l->sink = strcmp (GST_ELEMENT_NAME (ret), l->sink_name) == 0 ? ret : NULL;
- }
- }
- if (!l->sink) {
- if (l->sink_name) {
+
+ err=gst_resolve_reference( &(l->sink), ret);
+ if (err) {
+ if(-1==err){
SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
- "No element named \"%s\" - omitting link", l->sink_name);
- } else {
+ "No sink-element named \"%s\" - omitting link", l->src.name);
+ }else{
/* probably a missing element which we've handled already */
- }
- gst_parse_free_link (l);
- continue;
- }
+ SET_ERROR (error, GST_PARSE_ERROR_NO_SUCH_ELEMENT,
+ "No sink-element found - omitting link");
+ }
+ gst_parse_free_link (l);
+ continue;
}
gst_parse_perform_link (l, &g);
}
if (g.chain) {
g_slist_foreach (g.chain->elements, (GFunc)gst_object_unref, NULL);
g_slist_free (g.chain->elements);
- gst_parse_chain_free (g.chain);
+ gst_parse_free_chain (g.chain);
}
g_slist_foreach (g.links, (GFunc)gst_parse_free_link, NULL);
projects / platform / upstream / gstreamer.git / commitdiff