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00028 #include "asterisk.h"
00029
00030 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 180369 $")
00031
00032 #include <stdio.h>
00033 #include <stdlib.h>
00034 #include <string.h>
00035 #include <sys/types.h>
00036 #include <sys/stat.h>
00037
00038 #include "asterisk/module.h"
00039 #include "asterisk/channel.h"
00040 #include "asterisk/bridging.h"
00041 #include "asterisk/bridging_technology.h"
00042 #include "asterisk/frame.h"
00043
00044 static int simple_bridge_join(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel)
00045 {
00046 struct ast_channel *c0 = AST_LIST_FIRST(&bridge->channels)->chan, *c1 = AST_LIST_LAST(&bridge->channels)->chan;
00047
00048
00049 if (AST_LIST_FIRST(&bridge->channels) == AST_LIST_LAST(&bridge->channels)) {
00050 return 0;
00051 }
00052
00053
00054 if (((c0->writeformat == c1->readformat) && (c0->readformat == c1->writeformat) && (c0->nativeformats == c1->nativeformats))) {
00055 return 0;
00056 }
00057
00058
00059 return ast_channel_make_compatible(c0, c1);
00060 }
00061
00062 static enum ast_bridge_write_result simple_bridge_write(struct ast_bridge *bridge, struct ast_bridge_channel *bridge_channel, struct ast_frame *frame)
00063 {
00064 struct ast_bridge_channel *other = NULL;
00065
00066
00067 if (AST_LIST_FIRST(&bridge->channels) == AST_LIST_LAST(&bridge->channels)) {
00068 return AST_BRIDGE_WRITE_FAILED;
00069 }
00070
00071
00072 if (!(other = (AST_LIST_FIRST(&bridge->channels) == bridge_channel ? AST_LIST_LAST(&bridge->channels) : AST_LIST_FIRST(&bridge->channels)))) {
00073 return AST_BRIDGE_WRITE_FAILED;
00074 }
00075
00076
00077 if (other->state == AST_BRIDGE_CHANNEL_STATE_WAIT) {
00078 ast_write(other->chan, frame);
00079 }
00080
00081 return AST_BRIDGE_WRITE_SUCCESS;
00082 }
00083
00084 static struct ast_bridge_technology simple_bridge = {
00085 .name = "simple_bridge",
00086 .capabilities = AST_BRIDGE_CAPABILITY_1TO1MIX | AST_BRIDGE_CAPABILITY_THREAD,
00087 .preference = AST_BRIDGE_PREFERENCE_MEDIUM,
00088 .formats = AST_FORMAT_AUDIO_MASK | AST_FORMAT_VIDEO_MASK | AST_FORMAT_TEXT_MASK,
00089 .join = simple_bridge_join,
00090 .write = simple_bridge_write,
00091 };
00092
00093 static int unload_module(void)
00094 {
00095 return ast_bridge_technology_unregister(&simple_bridge);
00096 }
00097
00098 static int load_module(void)
00099 {
00100 return ast_bridge_technology_register(&simple_bridge);
00101 }
00102
00103 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Simple two channel bridging module");