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Diffstat (limited to 'bridges/bridge_simple.c')
-rw-r--r-- | bridges/bridge_simple.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/bridges/bridge_simple.c b/bridges/bridge_simple.c new file mode 100644 index 000000000..0dbcd25d2 --- /dev/null +++ b/bridges/bridge_simple.c @@ -0,0 +1,103 @@ +/* + * Asterisk -- An open source telephony toolkit. + * + * Copyright (C) 2007, Digium, Inc. + * + * Joshua Colp <jcolp@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 Simple two channel bridging module + * + * \author Joshua Colp <jcolp@digium.com> + * + * \ingroup bridges + */ + +#include "asterisk.h" + +ASTERISK_FILE_VERSION(__FILE__, "$Revision$") + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/types.h> +#include <sys/stat.h> + +#include "asterisk/module.h" +#include "asterisk/channel.h" +#include "asterisk/bridging.h" +#include "asterisk/bridging_technology.h" +#include "asterisk/frame.h" + +static int simple_bridge_join(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel) +{ + struct ast_channel *c0 = AST_LIST_FIRST(&bridge->channels)->chan, *c1 = AST_LIST_LAST(&bridge->channels)->chan; + + /* If this is the first channel we can't make it compatible... unless we make it compatible with itself O.o */ + if (AST_LIST_FIRST(&bridge->channels) == AST_LIST_LAST(&bridge->channels)) { + return 0; + } + + /* See if we need to make these compatible */ + if (((c0->writeformat == c1->readformat) && (c0->readformat == c1->writeformat) && (c0->nativeformats == c1->nativeformats))) { + return 0; + } + + /* BOOM! We do. */ + return ast_channel_make_compatible(c0, c1); +} + +static enum ast_bridge_write_result simple_bridge_write(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_frame *frame) +{ + struct ast_bridge_channel *other = NULL; + + /* If this is the only channel in this bridge then immediately exit */ + if (AST_LIST_FIRST(&bridge->channels) == AST_LIST_LAST(&bridge->channels)) { + return AST_BRIDGE_WRITE_FAILED; + } + + /* Find the channel we actually want to write to */ + if (!(other = (AST_LIST_FIRST(&bridge->channels) == bridge_channel ? AST_LIST_LAST(&bridge->channels) : AST_LIST_FIRST(&bridge->channels)))) { + return AST_BRIDGE_WRITE_FAILED; + } + + /* Write the frame out if they are in the waiting state... don't worry about freeing it, the bridging core will take care of it */ + if (other->state == AST_BRIDGE_CHANNEL_STATE_WAIT) { + ast_write(other->chan, frame); + } + + return AST_BRIDGE_WRITE_SUCCESS; +} + +static struct ast_bridge_technology simple_bridge = { + .name = "simple_bridge", + .capabilities = AST_BRIDGE_CAPABILITY_1TO1MIX | AST_BRIDGE_CAPABILITY_THREAD, + .preference = AST_BRIDGE_PREFERENCE_MEDIUM, + .formats = AST_FORMAT_AUDIO_MASK | AST_FORMAT_VIDEO_MASK | AST_FORMAT_TEXT_MASK, + .join = simple_bridge_join, + .write = simple_bridge_write, +}; + +static int unload_module(void) +{ + return ast_bridge_technology_unregister(&simple_bridge); +} + +static int load_module(void) +{ + return ast_bridge_technology_register(&simple_bridge); +} + +AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Simple two channel bridging module"); |