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This is filtered caps in 20 lines. Implemented full featured parsing of pipelines with filtered caps. To get a grip o...

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Original commit message from CVS:
This is filtered caps in 20 lines. Implemented full featured parsing of pipelines with filtered caps. To get a grip of the syntax you might want to look at testsuite/caps/string-conversions.c or run that test
This commit is contained in:
Benjamin Otte 2003-05-17 20:45:06 +00:00
parent 4471a7e84d
commit a960c7a7a3
2 changed files with 38 additions and 6 deletions
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14
gst/parse/grammar.y
View file

@ -464,9 +464,10 @@ gst_parse_perform_link (link_t *link, graph_t *graph)
g_assert (GST_IS_ELEMENT (src)); g_assert (GST_IS_ELEMENT (src));
g_assert (GST_IS_ELEMENT (sink)); g_assert (GST_IS_ELEMENT (sink));
GST_INFO (GST_CAT_PIPELINE, "linking %s(%s):%u to %s(%s):%u", GST_INFO (GST_CAT_PIPELINE, "linking %s(%s):%u to %s(%s):%u with caps \"%s\"",
GST_ELEMENT_NAME (src), link->src_name ? link->src_name : "---", g_slist_length (srcs), GST_ELEMENT_NAME (src), link->src_name ? link->src_name : "---", g_slist_length (srcs),
GST_ELEMENT_NAME (sink), link->sink_name ? link->sink_name : "---", g_slist_length (sinks)); GST_ELEMENT_NAME (sink), link->sink_name ? link->sink_name : "---", g_slist_length (sinks),
link->caps ? gst_caps_to_string (link->caps) : "-");
if (!srcs || !sinks) { if (!srcs || !sinks) {
if (gst_element_link_pads_filtered (src, srcs ? (const gchar *) srcs->data : NULL, if (gst_element_link_pads_filtered (src, srcs ? (const gchar *) srcs->data : NULL,
@ -535,6 +536,7 @@ static int yyerror (const char *s);
%token <s> IDENTIFIER %token <s> IDENTIFIER
%left <s> REF PADREF BINREF %left <s> REF PADREF BINREF
%token <s> ASSIGNMENT %token <s> ASSIGNMENT
%token <s> LINK
%type <g> graph %type <g> graph
%type <c> chain bin %type <c> chain bin
@ -604,7 +606,13 @@ linkpart: reference { $$ = $1; }
| /* NOP */ { MAKE_REF ($$, NULL, NULL); } | /* NOP */ { MAKE_REF ($$, NULL, NULL); }
; ;
link: linkpart '!' linkpart { $$ = $1; link: linkpart LINK linkpart { $$ = $1;
if ($2) {
$$->caps = gst_caps_from_string ($2);
if (!$$->caps)
ERROR (GST_PARSE_ERROR_LINK, "could not parse caps \"%s\"", $2);
gst_parse_strfree ($2);
}
$$->sink_name = $3->src_name; $$->sink_name = $3->src_name;
$$->sink_pads = $3->src_pads; $$->sink_pads = $3->src_pads;
gst_parse_link_free ($3); gst_parse_link_free ($3);

30
gst/parse/parse.l
View file

@ -21,11 +21,11 @@
#define YY_DECL int _gst_parse_yylex (YYSTYPE *lvalp) #define YY_DECL int _gst_parse_yylex (YYSTYPE *lvalp)
%} %}
_operators [(){}.:!,=] _operator [(){}.:!,;=]
_identifier [[:alpha:]][[:alnum:]\-_%]* _identifier [[:alpha:]][[:alnum:]\-_%]*
_char ("\\".)|([^[:space:]]) _char ("\\".)|([^[:space:]])
_string {_char}+|("\""([^\"]|"\\\"")*"\"") _string {_char}+|("\""([^\"]|"\\\"")*"\"")|("'"([^']|"\\\"")*"'")
_comma [[:space:]]*","[[:space:]]* _comma [[:space:]]*","[[:space:]]*
_assign [[:space:]]*"="[[:space:]]* _assign [[:space:]]*"="[[:space:]]*
@ -38,6 +38,12 @@ _padref "."{_identifier}
_ref {_identifier}"."{_identifier}? _ref {_identifier}"."{_identifier}?
_binref {_identifier}[[:space:]]*"."[[:space:]]*"(" _binref {_identifier}[[:space:]]*"."[[:space:]]*"("
/* links */
_capschar ("\\".)|([^[:space:]!.,;()\]\[])
_capsstring {_capschar}+|("\""([^\"]|"\\\"")*"\"")|("'"([^']|"\\\"")*"'")
_mimetype ({_capschar}+"/"{_capschar}+)|("\""([^\"]|"\\\"")*"\"")|("'"([^']|"\\\"")*"'")
_link ("!"[[:space:]]*{_mimetype}(","([^!]|{_capsstring})+)?[[:space:]]*"!")|("!")
%x value %x value
%option noyywrap %option noyywrap
%option nounput %option nounput
@ -83,7 +89,25 @@ _binref {_identifier}[[:space:]]*"."[[:space:]]*"("
return IDENTIFIER; return IDENTIFIER;
} }
{_operators} { PRINT ("OPERATOR: [%s]\n", yytext); return *yytext; } {_link} {
gchar *c = yytext;
PRINT ("LINK: %s\n", yytext);
c++;
if (*c) {
while (g_ascii_isspace (*c)) c++;
c = lvalp->s = gst_parse_strdup (c);
while (*c) c++;
g_assert (*--c == '!');
while (g_ascii_isspace (*--c));
*++c = '\0';
} else {
lvalp->s = NULL;
}
BEGIN (INITIAL);
return LINK;
}
{_operator} { PRINT ("OPERATOR: [%s]\n", yytext); return *yytext; }
[[:space:]]+ { PRINT ("SPACE: [%s]\n", yytext); } [[:space:]]+ { PRINT ("SPACE: [%s]\n", yytext); }