add an API so that translators can activate/deactivate themselves when needed

git-svn-id: http://svn.digium.com/svn/asterisk/branches/1.4@46714 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 37 insertions, 6 deletions

diff --git a/main/translate.c b/main/translate.c
index c7172619b..fed068d3f 100644
--- a/main/translate.c
+++ b/main/translate.c
@@ -427,6 +427,9 @@ static void rebuild_matrix(int samples)
 
 	/* first, compute all direct costs */
 	AST_LIST_TRAVERSE(&translators, t, list) {
+		if (!t->active)
+			continue;
+
 		x = t->srcfmt;
 		z = t->dstfmt;
 
@@ -656,6 +659,11 @@ int __ast_register_translator(struct ast_translator *t, struct ast_module *mod)
 	}
 
 	t->module = mod;
+
+	t->srcfmt = powerof(t->srcfmt);
+	t->dstfmt = powerof(t->dstfmt);
+	t->active = 1;
+
 	if (t->plc_samples) {
 		if (t->buffer_samples < t->plc_samples) {
 			ast_log(LOG_WARNING, "plc_samples %d buffer_samples %d\n",
@@ -666,17 +674,16 @@ int __ast_register_translator(struct ast_translator *t, struct ast_module *mod)
 			ast_log(LOG_WARNING, "plc_samples %d format %x\n",
 				t->plc_samples, t->dstfmt);
 	}
-	t->srcfmt = powerof(t->srcfmt);
-	t->dstfmt = powerof(t->dstfmt);
-	/* XXX maybe check that it is not existing yet ? */
 	if (t->srcfmt >= MAX_FORMAT) {
 		ast_log(LOG_WARNING, "Source format %s is larger than MAX_FORMAT\n", ast_getformatname(t->srcfmt));
 		return -1;
 	}
+
 	if (t->dstfmt >= MAX_FORMAT) {
 		ast_log(LOG_WARNING, "Destination format %s is larger than MAX_FORMAT\n", ast_getformatname(t->dstfmt));
 		return -1;
 	}
+
 	if (t->buf_size) {
                /*
 		* Align buf_size properly, rounding up to the machine-specific
@@ -684,24 +691,30 @@ int __ast_register_translator(struct ast_translator *t, struct ast_module *mod)
 		*/
 		struct _test_align { void *a, *b; } p;
 		int align = (char *)&p.b - (char *)&p.a;
+
 		t->buf_size = ((t->buf_size + align - 1) / align) * align;
 	}
+
 	if (t->frameout == NULL)
 		t->frameout = default_frameout;
   
 	calc_cost(t, 1);
+
 	if (option_verbose > 1) {
 		char tmp[80];
+
 		ast_verbose(VERBOSE_PREFIX_2 "Registered translator '%s' from format %s to %s, cost %d\n",
-			term_color(tmp, t->name, COLOR_MAGENTA, COLOR_BLACK, sizeof(tmp)),
-			ast_getformatname(1 << t->srcfmt), ast_getformatname(1 << t->dstfmt), t->cost);
+			    term_color(tmp, t->name, COLOR_MAGENTA, COLOR_BLACK, sizeof(tmp)),
+			    ast_getformatname(1 << t->srcfmt), ast_getformatname(1 << t->dstfmt), t->cost);
 	}
-	AST_LIST_LOCK(&translators);
+
 	if (!added_cli) {
 		ast_cli_register_multiple(cli_translate, sizeof(cli_translate) / sizeof(struct ast_cli_entry));
 		added_cli++;
 	}
 
+	AST_LIST_LOCK(&translators);
+
 	/* find any existing translators that provide this same srcfmt/dstfmt,
 	   and put this one in order based on cost */
 	AST_LIST_TRAVERSE_SAFE_BEGIN(&translators, u, list) {
@@ -720,7 +733,9 @@ int __ast_register_translator(struct ast_translator *t, struct ast_module *mod)
 		AST_LIST_INSERT_HEAD(&translators, t, list);
 
 	rebuild_matrix(0);
+
 	AST_LIST_UNLOCK(&translators);
+
 	return 0;
 }
 
@@ -751,6 +766,22 @@ int ast_unregister_translator(struct ast_translator *t)
 	return (u ? 0 : -1);
 }
 
+void ast_translator_activate(struct ast_translator *t)
+{
+	AST_LIST_LOCK(&translators);
+	t->active = 1;
+	rebuild_matrix(0);
+	AST_LIST_UNLOCK(&translators);
+}
+
+void ast_translator_deactivate(struct ast_translator *t)
+{
+	AST_LIST_LOCK(&translators);
+	t->active = 0;
+	rebuild_matrix(0);
+	AST_LIST_UNLOCK(&translators);
+}
+
 /*! \brief Calculate our best translator source format, given costs, and a desired destination */
 int ast_translator_best_choice(int *dst, int *srcs)
 {