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Add lots of code related to gst_structure_{to,from}_string
Original commit message from CVS:
Add lots of code related to gst_structure_{to,from}_string
This commit is contained in:
David Schleef
parent
74a1002b9f
commit
408ca875b9
4 changed files with 350 additions and 22 deletions
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@ -601,7 +601,7 @@ gst_structure_remove_all_fields(GstStructure *structure)
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* @fieldname: the name of the field
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*
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* Finds the field with the given name, and returns the type of the
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* value it contains. If the field is not found, G_TYPE_NONE is
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* value it contains. If the field is not found, G_TYPE_INVALID is
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* returned.
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*
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* Returns: the #GValue of the field
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@ -611,11 +611,11 @@ gst_structure_get_field_type(const GstStructure *structure, const gchar *fieldna
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{
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GstStructureField *field;
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g_return_val_if_fail(structure != NULL, G_TYPE_NONE);
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g_return_val_if_fail(fieldname != NULL, G_TYPE_NONE);
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g_return_val_if_fail(structure != NULL, G_TYPE_INVALID);
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g_return_val_if_fail(fieldname != NULL, G_TYPE_INVALID);
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field = gst_structure_get_field(structure, fieldname);
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if(field == NULL) return G_TYPE_NONE;
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if(field == NULL) return G_TYPE_INVALID;
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return G_VALUE_TYPE(&field->value);
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}
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@ -865,6 +865,67 @@ gst_structure_get_string(const GstStructure *structure, const gchar *fieldname)
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return g_value_get_string(&field->value);
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}
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typedef struct _GstStructureAbbreviation {
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char *type_name;
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GType type;
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} GstStructureAbbreviation;
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static GstStructureAbbreviation _gst_structure_abbrs[] = {
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{ "int", G_TYPE_INT },
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{ "i", G_TYPE_INT },
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{ "float", G_TYPE_FLOAT },
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{ "f", G_TYPE_FLOAT },
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{ "double", G_TYPE_DOUBLE },
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{ "d", G_TYPE_DOUBLE },
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//{ "fourcc", GST_TYPE_FOURCC },
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{ "boolean", G_TYPE_BOOLEAN },
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{ "bool", G_TYPE_BOOLEAN },
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{ "b", G_TYPE_BOOLEAN },
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{ "string", G_TYPE_STRING },
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{ "str", G_TYPE_STRING },
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{ "s", G_TYPE_STRING }
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};
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static GType _gst_structure_from_abbr(const char *type_name)
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{
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int i;
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g_return_val_if_fail(type_name != NULL, G_TYPE_INVALID);
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for(i=0;i<G_N_ELEMENTS(_gst_structure_abbrs);i++){
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if(strcmp(type_name,_gst_structure_abbrs[i].type_name)==0){
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return _gst_structure_abbrs[i].type;
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}
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}
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/* FIXME shouldn't be a special case */
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if (strcmp (type_name,"fourcc") == 0 || strcmp (type_name, "4") == 0) {
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return GST_TYPE_FOURCC;
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}
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return g_type_from_name (type_name);
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}
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static const char *_gst_structure_to_abbr(GType type)
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{
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int i;
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g_return_val_if_fail(type != G_TYPE_INVALID, NULL);
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for(i=0;i<G_N_ELEMENTS(_gst_structure_abbrs);i++){
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if(type == _gst_structure_abbrs[i].type){
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return _gst_structure_abbrs[i].type_name;
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}
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}
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/* FIXME shouldn't be a special case */
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if (type == GST_TYPE_FOURCC) {
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return "fourcc";
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}
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return g_type_name(type);
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}
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/**
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* gst_structure_to_string:
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* @structure: a #GstStructure
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@ -892,13 +953,234 @@ gst_structure_to_string(const GstStructure *structure)
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g_value_init(&s_val, G_TYPE_STRING);
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g_value_transform(&field->value, &s_val);
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g_string_append_printf(s, ", %s:%s", g_quark_to_string(field->name),
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g_string_append_printf(s, ", %s:%s=%s", g_quark_to_string(field->name),
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_gst_structure_to_abbr(G_VALUE_TYPE(&field->value)),
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g_value_get_string(&s_val));
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g_value_unset(&s_val);
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}
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return g_string_free(s, FALSE);
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}
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/*
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* r will still point to the string. if end == next, the string will not be
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* null-terminated. In all other cases it will be.
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* end = pointer to char behind end of string, next = pointer to start of
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* unread data.
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* THIS FUNCTION MODIFIES THE STRING AND DETECTS INSIDE A NONTERMINATED STRING
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*/
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static gboolean
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_gst_structure_parse_string (gchar *r, gchar **end, gchar **next)
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{
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gchar *w;
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gchar c = '\0';
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w = r;
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if (*r == '\'' || *r == '\"') {
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c = *r;
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r++;
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}
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for (;;r++) {
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if (*r == '\0') {
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if (c) {
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goto error;
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} else {
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goto found;
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}
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}
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if (*r == '\\') {
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r++;
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if (*r == '\0')
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goto error;
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*w++ = *r;
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continue;
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}
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if (*r == c) {
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r++;
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if (*r == '\0')
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goto found;
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break;
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}
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if (!c) {
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if (g_ascii_isspace (*r))
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break;
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/* this needs to be escaped */
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if (*r == ',' || *r == ')' || *r == ']' || *r == ':' ||
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*r == ';' || *r == '(' || *r == '[')
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break;
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}
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*w++ = *r;
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}
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found:
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while (g_ascii_isspace (*r)) r++;
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if (w != r)
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*w++ = '\0';
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*end = w;
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*next = r;
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return TRUE;
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error:
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return FALSE;
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}
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static gboolean
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_gst_structure_parse_field (gchar *str, gchar **after, GstStructureField *field)
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{
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/* NAME[:TYPE]=VALUE */
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gchar *name;
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gchar *type_name;
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gchar *s, *del;
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gchar *val;
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gchar *end;
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gboolean have_type = FALSE;
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GType type = G_TYPE_INVALID;
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int ret;
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g_print("parsing: \"%s\"\n", str);
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name = s = str;
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while (g_ascii_isalnum (*s) || *s == '_' || *s == '-') s++;
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del = s;
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while (g_ascii_isspace (*s)) s++;
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if (!(*s == '=' || *s == ':')) return FALSE;
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if (*s == ':') have_type = TRUE;
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s++;
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while (g_ascii_isspace (*s)) s++;
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*del = '\0';
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field->name = g_quark_from_string (name);
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if (have_type) {
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while (g_ascii_isspace (*s)) s++;
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type_name = s;
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while (g_ascii_isalnum (*s) || *s == '_' || *s == '-') s++;
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del = s;
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while (g_ascii_isspace (*s)) s++;
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if (*s != '=') return FALSE;
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s++;
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while (g_ascii_isspace (*s)) s++;
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*del = '\0';
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g_print("type name is \"%s\"\n",type_name);
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type = _gst_structure_from_abbr(type_name);
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g_print("type n is \"%s\"\n",g_type_name(type));
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if (type == G_TYPE_INVALID) return FALSE;
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} else {
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if (g_ascii_isdigit (*s)) {
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char *t = s;
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while (g_ascii_isdigit (*t)) t++;
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if (*t == '.'){
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type = G_TYPE_DOUBLE;
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} else {
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type = G_TYPE_INT;
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}
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} else if (g_ascii_isalpha (*s) || *s == '"' || *s == '\'') {
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type = G_TYPE_STRING;
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} else {
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/* FIXME */
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return FALSE;
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}
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}
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g_value_init(&field->value, type);
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ret = FALSE;
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val = s;
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switch (type) {
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case G_TYPE_INT:
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{
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int x;
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x = strtol (val, &s, 0);
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if (val != s) {
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g_value_set_int (&field->value, x);
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ret = TRUE;
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}
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}
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break;
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case G_TYPE_FLOAT:
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{
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double x;
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x = g_ascii_strtod (val, &s);
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if (val != s) {
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g_value_set_float (&field->value, x);
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ret = TRUE;
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}
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}
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break;
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case G_TYPE_DOUBLE:
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{
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double x;
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x = g_ascii_strtod (val, &s);
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if (val != s) {
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g_value_set_double (&field->value, x);
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ret = TRUE;
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}
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}
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break;
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case G_TYPE_BOOLEAN:
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{
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int len;
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ret = _gst_structure_parse_string (val, &end, &s);
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len = end - val;
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if (ret) {
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if (strncmp (val, "true", len) == 0 ||
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strncmp (val, "yes", len) == 0 ||
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(len == 1 && (*val == 't' || *val == '1'))) {
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g_value_set_boolean (&field->value, TRUE);
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} else if (strncmp (val, "false", len) == 0 ||
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strncmp (val, "no", len) == 0 ||
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(len == 1 && (*val == 'f' || *val == '0'))) {
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g_value_set_boolean (&field->value, FALSE);
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} else {
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ret = FALSE;
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}
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}
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}
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break;
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case G_TYPE_STRING:
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{
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ret = _gst_structure_parse_string (val, &end, &s);
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if (ret) {
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g_value_set_string_take_ownership (&field->value,
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g_strndup(val, end - val));
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ret = TRUE;
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}
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}
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break;
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default:
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/* FIXME: make more general */
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if (type == GST_TYPE_FOURCC) {
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guint32 fourcc = 0;
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if (g_ascii_isdigit (*s)) {
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fourcc = strtoul (val, &s, 0);
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if (val != s) {
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ret = TRUE;
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}
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} else {
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ret = _gst_structure_parse_string (val, &end, &s);
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g_print("end - val = %d\n", end - val);
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if (end - val >= 4) {
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fourcc = GST_MAKE_FOURCC(val[0], val[1], val[2], val[3]);
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ret = TRUE;
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}
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}
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gst_value_set_fourcc (&field->value, fourcc);
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} else {
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g_critical("not handled");
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}
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break;
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}
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*after = s;
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return ret;
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}
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/**
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* gst_structure_from_string:
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* @structure: a #GstStructure
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@ -908,15 +1190,49 @@ gst_structure_to_string(const GstStructure *structure)
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* Returns: a new #GstStructure
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*/
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GstStructure *
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gst_structure_from_string (const gchar *string)
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gst_structure_from_string (const gchar *string, gchar **end)
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{
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/* FIXME */
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char *name;
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char *copy;
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char *w;
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char *r;
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char save;
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GstStructure *structure;
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GstStructureField field = { 0 };
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gboolean res;
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g_return_val_if_fail(string != NULL, NULL);
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g_assert_not_reached();
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copy = g_strdup(string);
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r = copy;
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return NULL;
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name = r;
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res = _gst_structure_parse_string (r, &w, &r);
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if (!res) return NULL;
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while (*r && g_ascii_isspace(*r)) r++;
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if(!*r) return NULL;
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if(*r != ';' && *r != ',') return NULL;
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if(*r == ',') r++;
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save = *w;
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*w = 0;
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structure = gst_structure_empty_new(name);
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*w = save;
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while (*r && g_ascii_isspace(*r)) r++;
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while (*r && (*r != ';')){
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res = _gst_structure_parse_field (r, &r, &field);
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g_print("returned %d \"%s\"\n", res, r);
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if (!res) {
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gst_structure_free (structure);
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return NULL;
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}
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gst_structure_set_field(structure, &field);
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}
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if (end) *end = (char *)string + (r - copy);
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return structure;
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}
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static void
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@ -59,7 +59,7 @@ GstStructure *gst_structure_new_valist(const gchar *name,
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GstStructure *gst_structure_copy(GstStructure *structure);
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void gst_structure_free(GstStructure *structure);
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const gchar *gst_structure_get_name(GstStructure *structure);
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G_CONST_RETURN gchar *gst_structure_get_name(GstStructure *structure);
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void gst_structure_set_name(GstStructure *structure, const gchar *name);
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void gst_structure_set_field_copy (GstStructure *structure,
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const GstStructureField *field);
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@ -73,7 +73,7 @@ void gst_structure_set_value(GstStructure *structure, const gchar *field,
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void gst_structure_set(GstStructure *structure, const gchar *field, ...);
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void gst_structure_set_valist(GstStructure *structure, const gchar *field,
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va_list varargs);
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const GValue *gst_structure_get_value(const GstStructure *structure, const gchar *field);
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G_CONST_RETURN GValue *gst_structure_get_value(const GstStructure *structure, const gchar *field);
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GstStructureField *gst_structure_get_field(const GstStructure *structure,
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const gchar *fieldname);
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GstStructureField *gst_structure_id_get_field(const GstStructure *structure,
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@ -100,11 +100,11 @@ gboolean gst_structure_get_fourcc(const GstStructure *structure, const gchar *fi
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guint32 *value);
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gboolean gst_structure_get_double(const GstStructure *structure, const gchar *field,
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gdouble *value);
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const gchar *gst_structure_get_string(const GstStructure *structure,
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G_CONST_RETURN gchar *gst_structure_get_string(const GstStructure *structure,
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const gchar *field);
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gchar * gst_structure_to_string(const GstStructure *structure);
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GstStructure * gst_structure_from_string (const gchar *string);
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GstStructure * gst_structure_from_string (const gchar *string, gchar **end);
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G_END_DECLS
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@ -48,7 +48,7 @@ struct _GstValueIntersectInfo {
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GType gst_type_fourcc;
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GType gst_type_int_range;
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GType gst_type_double_range;
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GType gst_type_value_list;
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GType gst_type_list;
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GArray *gst_value_compare_funcs;
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GArray *gst_value_union_funcs;
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@ -178,7 +178,7 @@ gst_value_union_lists (GValue *dest, const GValue *value1, const GValue *value2)
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value1_length = (GST_VALUE_HOLDS_LIST (value1) ? gst_value_list_get_size (value1) : 1);
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value2_length = (GST_VALUE_HOLDS_LIST (value2) ? gst_value_list_get_size (value2) : 1);
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g_value_init (dest, GST_TYPE_VALUE_LIST);
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g_value_init (dest, GST_TYPE_LIST);
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array = (GArray *) dest->data[0].v_pointer;
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g_array_set_size (array, value1_length + value2_length);
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@ -415,8 +415,17 @@ static void
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gst_value_transform_fourcc_string (const GValue *src_value,
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GValue *dest_value)
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{
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dest_value->data[0].v_pointer = g_strdup_printf(GST_FOURCC_FORMAT,
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GST_FOURCC_ARGS(src_value->data[0].v_long));
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guint32 fourcc = src_value->data[0].v_long;
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if (g_ascii_isprint ((fourcc>>0) & 0xff) &&
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g_ascii_isprint ((fourcc>>8) & 0xff) &&
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g_ascii_isprint ((fourcc>>16) & 0xff) &&
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g_ascii_isprint ((fourcc>>24) & 0xff)){
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dest_value->data[0].v_pointer = g_strdup_printf(
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"\"" GST_FOURCC_FORMAT "\"", GST_FOURCC_ARGS(fourcc));
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} else {
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dest_value->data[0].v_pointer = g_strdup_printf("0x%08x", fourcc);
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}
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}
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static void
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|
@ -730,7 +739,7 @@ _gst_value_initialize (void)
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gst_value_lcopy_list
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};
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||||
info.value_table = &value_table;
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||||
gst_type_value_list = g_type_register_static (G_TYPE_BOXED, "GstValueList", &info, 0);
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gst_type_list = g_type_register_static (G_TYPE_BOXED, "GstValueList", &info, 0);
|
||||
}
|
||||
|
||||
g_value_register_transform_func (GST_TYPE_FOURCC, G_TYPE_STRING,
|
||||
|
|
|
|||
|
|
@ -41,14 +41,16 @@ typedef int (* GstValueIntersectFunc) (GValue *dest, const GValue *value1,
|
|||
((gchar) (((fourcc)>>16)&0xff)), \
|
||||
((gchar) (((fourcc)>>24)&0xff))
|
||||
|
||||
#define GST_VALUE_HOLDS_FOURCC(x) (G_VALUE_TYPE(x) == gst_type_fourcc)
|
||||
#define GST_VALUE_HOLDS_INT_RANGE(x) (G_VALUE_TYPE(x) == gst_type_int_range)
|
||||
#define GST_VALUE_HOLDS_DOUBLE_RANGE(x) (G_VALUE_TYPE(x) == gst_type_double_range)
|
||||
#define GST_VALUE_HOLDS_CAPS(x) TRUE /* FIXME */
|
||||
#define GST_VALUE_HOLDS_FOURCC(x) (G_VALUE_HOLDS(x, gst_type_fourcc))
|
||||
#define GST_VALUE_HOLDS_INT_RANGE(x) (G_VALUE_HOLDS(x, gst_type_int_range))
|
||||
#define GST_VALUE_HOLDS_DOUBLE_RANGE(x) (G_VALUE_HOLDS(x, gst_type_double_range))
|
||||
#define GST_VALUE_HOLDS_LIST(x) (G_VALUE_HOLDS(x, gst_type_list))
|
||||
#define GST_VALUE_HOLDS_CAPS(x) TRUE /* FIXME */
|
||||
|
||||
#define GST_TYPE_FOURCC gst_type_fourcc
|
||||
#define GST_TYPE_INT_RANGE gst_type_int_range
|
||||
#define GST_TYPE_DOUBLE_RANGE gst_type_double_range
|
||||
#define GST_TYPE_LIST gst_type_list
|
||||
|
||||
#define GST_VALUE_LESS_THAN (-1)
|
||||
#define GST_VALUE_EQUAL 0
|
||||
|
|
@ -58,6 +60,7 @@ typedef int (* GstValueIntersectFunc) (GValue *dest, const GValue *value1,
|
|||
extern GType gst_type_fourcc;
|
||||
extern GType gst_type_int_range;
|
||||
extern GType gst_type_double_range;
|
||||
extern GType gst_type_list;
|
||||
|
||||
void gst_value_set_fourcc (GValue *value, guint32 fourcc);
|
||||
guint32 gst_value_get_fourcc (const GValue *value);
|
||||
|
|
|
|||
Loading…
Reference in a new issue