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6fd3db51e8
This change makes it so that the conference recorder channel that is created only contains audio formats and an audio stream. This is because the underlying application used by ConfBridge to record, MixMonitor, only allows recording audio. Having additional streams (and in particular a video stream) can result in clients needlessly renegotiating to add a video stream that will never receive video. Change-Id: I89d38aedc9205eca7741d5435e73e73bb9de97a0
106 lines
2.8 KiB
C
106 lines
2.8 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2013 Digium, Inc.
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*
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* Richard Mudgett <rmudgett@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*!
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* \file
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* \brief ConfBridge recorder channel driver
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*
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* \author Richard Mudgett <rmudgett@digium.com>
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*
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* See Also:
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* \arg \ref AstCREDITS
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*/
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#include "asterisk.h"
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#include "asterisk/channel.h"
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#include "asterisk/bridge.h"
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#include "asterisk/format_cache.h"
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#include "include/confbridge.h"
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/* ------------------------------------------------------------------- */
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static unsigned int name_sequence = 0;
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static int rec_call(struct ast_channel *chan, const char *addr, int timeout)
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{
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/* Make sure anyone calling ast_call() for this channel driver is going to fail. */
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return -1;
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}
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static struct ast_frame *rec_read(struct ast_channel *ast)
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{
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return &ast_null_frame;
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}
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static int rec_write(struct ast_channel *ast, struct ast_frame *f)
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{
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return 0;
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}
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static struct ast_channel *rec_request(const char *type, struct ast_format_cap *cap, const struct ast_assigned_ids *assignedids, const struct ast_channel *requestor, const char *data, int *cause)
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{
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struct ast_channel *chan;
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const char *conf_name = data;
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RAII_VAR(struct ast_format_cap *, capabilities, NULL, ao2_cleanup);
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int generated_seqno = ast_atomic_fetchadd_int((int *) &name_sequence, +1);
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capabilities = ast_format_cap_alloc(AST_FORMAT_CAP_FLAG_DEFAULT);
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if (!capabilities) {
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return NULL;
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}
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ast_format_cap_append_by_type(capabilities, AST_MEDIA_TYPE_AUDIO);
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chan = ast_channel_alloc(1, AST_STATE_UP, NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0,
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"CBRec/%s-%08x",
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conf_name, (unsigned) generated_seqno);
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if (!chan) {
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return NULL;
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}
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if (ast_channel_add_bridge_role(chan, "recorder")) {
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ast_channel_unlock(chan);
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ast_channel_release(chan);
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return NULL;
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}
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ast_channel_tech_set(chan, conf_record_get_tech());
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ast_channel_nativeformats_set(chan, capabilities);
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ast_channel_set_writeformat(chan, ast_format_slin);
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ast_channel_set_rawwriteformat(chan, ast_format_slin);
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ast_channel_set_readformat(chan, ast_format_slin);
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ast_channel_set_rawreadformat(chan, ast_format_slin);
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ast_channel_unlock(chan);
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return chan;
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}
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static struct ast_channel_tech record_tech = {
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.type = "CBRec",
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.description = "Conference Bridge Recording Channel",
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.requester = rec_request,
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.call = rec_call,
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.read = rec_read,
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.write = rec_write,
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.properties = AST_CHAN_TP_INTERNAL,
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};
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struct ast_channel_tech *conf_record_get_tech(void)
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{
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return &record_tech;
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}
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