Adds the format_attr_celt file which was also missing from the CELT pass through patch.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@326904 65c4cc65-6c06-0410-ace0-fbb531ad65f3

formats/format_attr_celt.c

+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2011, Digium, Inc.
+ *
+ * David Vossel <dvossel@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*!
+ * \file
+ * \brief CELT format attribute interface
+ *
+ * \author David Vossel <dvossel@digium.com>
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include "asterisk/module.h"
+#include "asterisk/format.h"
+
+/*!
+ * \brief CELT attribute structure.
+ *
+ * \note The only attribute that affects compatibility here is the sample rate.
+ */
+struct celt_attr {
+	unsigned int samplerate;
+	unsigned int maxbitrate;
+	unsigned int framesize;
+};
+
+static enum ast_format_cmp_res celt_cmp(const struct ast_format_attr *fattr1, const struct ast_format_attr *fattr2)
+{
+	struct celt_attr *attr1 = (struct celt_attr *) fattr1;
+	struct celt_attr *attr2 = (struct celt_attr *) fattr2;
+
+	if (attr1->samplerate == attr2->samplerate) {
+		return AST_FORMAT_CMP_EQUAL;
+	}
+	return AST_FORMAT_CMP_NOT_EQUAL;
+}
+
+static int celt_get_val(const struct ast_format_attr *fattr, int key, void *result)
+{
+	const struct celt_attr *attr = (struct celt_attr *) fattr;
+	int *val = result;
+
+	switch (key) {
+	case CELT_ATTR_KEY_SAMP_RATE:
+		*val = attr->samplerate;
+		break;
+	case CELT_ATTR_KEY_MAX_BITRATE:
+		*val = attr->maxbitrate;
+		break;
+	case CELT_ATTR_KEY_FRAME_SIZE:
+		*val = attr->framesize;
+		break;
+	default:
+		return -1;
+		ast_log(LOG_WARNING, "unknown attribute type %d\n", key);
+	}
+	return 0;
+}
+
+static int celt_isset(const struct ast_format_attr *fattr, va_list ap)
+{
+	enum celt_attr_keys key;
+	const struct celt_attr *attr = (struct celt_attr *) fattr;
+
+	for (key = va_arg(ap, int);
+		key != AST_FORMAT_ATTR_END;
+		key = va_arg(ap, int))
+	{
+		switch (key) {
+		case CELT_ATTR_KEY_SAMP_RATE:
+			if (attr->samplerate != (va_arg(ap, int))) {
+				return -1;
+			}
+			break;
+		case CELT_ATTR_KEY_MAX_BITRATE:
+			if (attr->maxbitrate != (va_arg(ap, int))) {
+				return -1;
+			}
+			break;
+		case CELT_ATTR_KEY_FRAME_SIZE:
+			if (attr->framesize != (va_arg(ap, int))) {
+				return -1;
+			}
+			break;
+		default:
+			return -1;
+			ast_log(LOG_WARNING, "unknown attribute type %d\n", key);
+		}
+	}
+	return 0;
+}
+static int celt_getjoint(const struct ast_format_attr *fattr1, const struct ast_format_attr *fattr2, struct ast_format_attr *result)
+{
+	struct celt_attr *attr1 = (struct celt_attr *) fattr1;
+	struct celt_attr *attr2 = (struct celt_attr *) fattr2;
+	struct celt_attr *attr_res = (struct celt_attr *) result;
+
+	/* sample rate is the only attribute that has any bearing on if joint capabilities exist or not */
+	if (attr1->samplerate != attr2->samplerate) {
+		return -1;
+	}
+	/* either would work, they are guaranteed the same at this point. */
+	attr_res->samplerate = attr1->samplerate;
+	/* Take the lowest max bitrate */
+	attr_res->maxbitrate = MIN(attr1->maxbitrate, attr2->maxbitrate);
+
+	attr_res->framesize = attr2->framesize; /* TODO figure out what joint framesize means */
+	return 0;
+}
+
+static void celt_set(struct ast_format_attr *fattr, va_list ap)
+{
+	enum celt_attr_keys key;
+	struct celt_attr *attr = (struct celt_attr *) fattr;
+
+	for (key = va_arg(ap, int);
+		key != AST_FORMAT_ATTR_END;
+		key = va_arg(ap, int))
+	{
+		switch (key) {
+		case CELT_ATTR_KEY_SAMP_RATE:
+			attr->samplerate = (va_arg(ap, int));
+			break;
+		case CELT_ATTR_KEY_MAX_BITRATE:
+			attr->maxbitrate = (va_arg(ap, int));
+			break;
+		case CELT_ATTR_KEY_FRAME_SIZE:
+			attr->framesize = (va_arg(ap, int));
+			break;
+		default:
+			ast_log(LOG_WARNING, "unknown attribute type %d\n", key);
+		}
+	}
+}
+
+static struct ast_format_attr_interface celt_interface = {
+	.id = AST_FORMAT_CELT,
+	.format_attr_cmp = celt_cmp,
+	.format_attr_get_joint = celt_getjoint,
+	.format_attr_set = celt_set,
+	.format_attr_isset = celt_isset,
+	.format_attr_get_val = celt_get_val,
+};
+
+static int load_module(void)
+{
+	if (ast_format_attr_reg_interface(&celt_interface)) {
+		return AST_MODULE_LOAD_DECLINE;
+	}
+
+	return AST_MODULE_LOAD_SUCCESS;
+}
+
+static int unload_module(void)
+{
+	ast_format_attr_unreg_interface(&celt_interface);
+	return 0;
+}
+
+AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "CELT Format Attribute Module",
+	.load = load_module,
+	.unload = unload_module,
+	.load_pri = AST_MODPRI_CHANNEL_DEPEND,
+);