示例#1
0
int ast_jb_do_usecheck(struct ast_channel *c0, struct ast_channel *c1)
{
	struct ast_jb *jb0 = ast_channel_jb(c0);
	struct ast_jb *jb1 = ast_channel_jb(c1);
	struct ast_jb_conf *conf0 = &jb0->conf;
	struct ast_jb_conf *conf1 = &jb1->conf;
	int c0_wants_jitter = ast_channel_tech(c0)->properties & AST_CHAN_TP_WANTSJITTER;
	int c0_creates_jitter = ast_channel_tech(c0)->properties & AST_CHAN_TP_CREATESJITTER;
	int c0_jb_enabled = ast_test_flag(conf0, AST_JB_ENABLED);
	int c0_force_jb = ast_test_flag(conf0, AST_JB_FORCED);
	int c0_jb_timebase_initialized = ast_test_flag(jb0, JB_TIMEBASE_INITIALIZED);
	int c0_jb_created = ast_test_flag(jb0, JB_CREATED);
	int c1_wants_jitter = ast_channel_tech(c1)->properties & AST_CHAN_TP_WANTSJITTER;
	int c1_creates_jitter = ast_channel_tech(c1)->properties & AST_CHAN_TP_CREATESJITTER;
	int c1_jb_enabled = ast_test_flag(conf1, AST_JB_ENABLED);
	int c1_force_jb = ast_test_flag(conf1, AST_JB_FORCED);
	int c1_jb_timebase_initialized = ast_test_flag(jb1, JB_TIMEBASE_INITIALIZED);
	int c1_jb_created = ast_test_flag(jb1, JB_CREATED);
	int inuse = 0;

	/* Determine whether audio going to c0 needs a jitter buffer */
	if (((!c0_wants_jitter && c1_creates_jitter) || (c0_force_jb && c1_creates_jitter)) && c0_jb_enabled) {
		ast_set_flag(jb0, JB_USE);
		if (!c0_jb_timebase_initialized) {
			if (c1_jb_timebase_initialized) {
				memcpy(&jb0->timebase, &jb1->timebase, sizeof(struct timeval));
			} else {
				gettimeofday(&jb0->timebase, NULL);
			}
			ast_set_flag(jb0, JB_TIMEBASE_INITIALIZED);
		}

		if (!c0_jb_created) {
			jb_choose_impl(c0);
		}

		inuse = 1;
	}

	/* Determine whether audio going to c1 needs a jitter buffer */
	if (((!c1_wants_jitter && c0_creates_jitter) || (c1_force_jb && c0_creates_jitter)) && c1_jb_enabled) {
		ast_set_flag(jb1, JB_USE);
		if (!c1_jb_timebase_initialized) {
			if (c0_jb_timebase_initialized) {
				memcpy(&jb1->timebase, &jb0->timebase, sizeof(struct timeval));
			} else {
				gettimeofday(&jb1->timebase, NULL);
			}
			ast_set_flag(jb1, JB_TIMEBASE_INITIALIZED);
		}

		if (!c1_jb_created) {
			jb_choose_impl(c1);
		}

		inuse = 1;
	}

	return inuse;
}
示例#2
0
void ast_jb_get_and_deliver(struct ast_channel *c0, struct ast_channel *c1)
{
	struct ast_jb *jb0 = ast_channel_jb(c0);
	struct ast_jb *jb1 = ast_channel_jb(c1);
	int c0_use_jb = ast_test_flag(jb0, JB_USE);
	int c0_jb_is_created = ast_test_flag(jb0, JB_CREATED);
	int c1_use_jb = ast_test_flag(jb1, JB_USE);
	int c1_jb_is_created = ast_test_flag(jb1, JB_CREATED);

	if (c0_use_jb && c0_jb_is_created)
		jb_get_and_deliver(c0);

	if (c1_use_jb && c1_jb_is_created)
		jb_get_and_deliver(c1);
}
示例#3
0
void ast_jb_destroy(struct ast_channel *chan)
{
	struct ast_jb *jb = ast_channel_jb(chan);
	const struct ast_jb_impl *jbimpl = jb->impl;
	void *jbobj = jb->jbobj;
	struct ast_frame *f;

	if (jb->logfile) {
		fclose(jb->logfile);
		jb->logfile = NULL;
	}

	if (ast_test_flag(jb, JB_CREATED)) {
		/* Remove and free all frames still queued in jb */
		while (jbimpl->remove(jbobj, &f) == AST_JB_IMPL_OK) {
			ast_frfree(f);
		}

		jbimpl->destroy(jbobj);
		jb->jbobj = NULL;

		ast_clear_flag(jb, JB_CREATED);

		ast_verb(3, "%s jitterbuffer destroyed on channel %s\n", jbimpl->name, ast_channel_name(chan));
	}
}
示例#4
0
void ast_jb_enable_for_channel(struct ast_channel *chan)
{
	struct ast_jb_conf conf = ast_channel_jb(chan)->conf;
	if (ast_test_flag(&conf, AST_JB_ENABLED)) {
		ast_jb_create_framehook(chan, &conf, 1);
	}
}
示例#5
0
void ast_jb_empty_and_reset(struct ast_channel *c0, struct ast_channel *c1)
{
	struct ast_jb *jb0 = ast_channel_jb(c0);
	struct ast_jb *jb1 = ast_channel_jb(c1);
	int c0_use_jb = ast_test_flag(jb0, JB_USE);
	int c0_jb_is_created = ast_test_flag(jb0, JB_CREATED);
	int c1_use_jb = ast_test_flag(jb1, JB_USE);
	int c1_jb_is_created = ast_test_flag(jb1, JB_CREATED);

	if (c0_use_jb && c0_jb_is_created && jb0->impl->empty_and_reset) {
		jb0->impl->empty_and_reset(jb0->jbobj);
	}

	if (c1_use_jb && c1_jb_is_created && jb1->impl->empty_and_reset) {
		jb1->impl->empty_and_reset(jb1->jbobj);
	}
}
示例#6
0
static void jb_get_and_deliver(struct ast_channel *chan)
{
	struct ast_jb *jb = ast_channel_jb(chan);
	const struct ast_jb_impl *jbimpl = jb->impl;
	void *jbobj = jb->jbobj;
	struct ast_frame *f, finterp = { .frametype = AST_FRAME_VOICE, };
	long now;
	int interpolation_len, res;

	now = get_now(jb, NULL);
	jb->next = jbimpl->next(jbobj);
	if (now < jb->next) {
		jb_framelog("\tJB_GET {now=%ld}: now < next=%ld\n", now, jb->next);
		return;
	}

	while (now >= jb->next) {
		interpolation_len = ast_codec_interp_len(&jb->last_format);

		res = jbimpl->get(jbobj, &f, now, interpolation_len);

		switch (res) {
		case AST_JB_IMPL_OK:
			/* deliver the frame */
			ast_write(chan, f);
		case AST_JB_IMPL_DROP:
			jb_framelog("\tJB_GET {now=%ld}: %s frame with ts=%ld and len=%ld\n",
				now, jb_get_actions[res], f->ts, f->len);
			ast_format_copy(&jb->last_format, &f->subclass.format);
			ast_frfree(f);
			break;
		case AST_JB_IMPL_INTERP:
			/* interpolate a frame */
			f = &finterp;
			ast_format_copy(&f->subclass.format, &jb->last_format);
			f->samples  = interpolation_len * 8;
			f->src  = "JB interpolation";
			f->delivery = ast_tvadd(jb->timebase, ast_samp2tv(jb->next, 1000));
			f->offset = AST_FRIENDLY_OFFSET;
			/* deliver the interpolated frame */
			ast_write(chan, f);
			jb_framelog("\tJB_GET {now=%ld}: Interpolated frame with len=%d\n", now, interpolation_len);
			break;
		case AST_JB_IMPL_NOFRAME:
			ast_log(LOG_WARNING,
				"AST_JB_IMPL_NOFRAME is returned from the %s jb when now=%ld >= next=%ld, jbnext=%ld!\n",
				jbimpl->name, now, jb->next, jbimpl->next(jbobj));
			jb_framelog("\tJB_GET {now=%ld}: No frame for now!?\n", now);
			return;
		default:
			ast_log(LOG_ERROR, "This should never happen!\n");
			ast_assert("JB type unknown" == NULL);
			break;
		}

		jb->next = jbimpl->next(jbobj);
	}
}
示例#7
0
int ast_jb_get_when_to_wakeup(struct ast_channel *c0, struct ast_channel *c1, int time_left)
{
	struct ast_jb *jb0 = ast_channel_jb(c0);
	struct ast_jb *jb1 = ast_channel_jb(c1);
	int c0_use_jb = ast_test_flag(jb0, JB_USE);
	int c0_jb_is_created = ast_test_flag(jb0, JB_CREATED);
	int c1_use_jb = ast_test_flag(jb1, JB_USE);
	int c1_jb_is_created = ast_test_flag(jb1, JB_CREATED);
	int wait, wait0, wait1;
	struct timeval tv_now;

	if (time_left == 0) {
		/* No time left - the bridge will be retried */
		/* TODO: Test disable this */
		/*return 0;*/
	}

	if (time_left < 0) {
		time_left = INT_MAX;
	}

	gettimeofday(&tv_now, NULL);

	wait0 = (c0_use_jb && c0_jb_is_created) ? jb0->next - get_now(jb0, &tv_now) : time_left;
	wait1 = (c1_use_jb && c1_jb_is_created) ? jb1->next - get_now(jb1, &tv_now) : time_left;

	wait = wait0 < wait1 ? wait0 : wait1;
	wait = wait < time_left ? wait : time_left;

	if (wait == INT_MAX) {
		wait = -1;
	} else if (wait < 1) {
		/* don't let wait=0, because this can cause the pbx thread to loop without any sleeping at all */
		wait = 1;
	}

	return wait;
}
示例#8
0
static void jb_choose_impl(struct ast_channel *chan)
{
	struct ast_jb *jb = ast_channel_jb(chan);
	struct ast_jb_conf *jbconf = &jb->conf;
	const struct ast_jb_impl *test_impl;
	int i, avail_impl_count = ARRAY_LEN(avail_impl);

	jb->impl = &avail_impl[default_impl];

	if (ast_strlen_zero(jbconf->impl)) {
		return;
	}

	for (i = 0; i < avail_impl_count; i++) {
		test_impl = &avail_impl[i];
		if (!strcasecmp(jbconf->impl, test_impl->name)) {
			jb->impl = test_impl;
			return;
		}
	}
}
示例#9
0
void ast_jb_get_config(const struct ast_channel *chan, struct ast_jb_conf *conf)
{
	memcpy(conf, &ast_channel_jb((struct ast_channel *) chan)->conf, sizeof(*conf));
}
示例#10
0
void ast_jb_configure(struct ast_channel *chan, const struct ast_jb_conf *conf)
{
	memcpy(&ast_channel_jb(chan)->conf, conf, sizeof(*conf));
}
示例#11
0
static int create_jb(struct ast_channel *chan, struct ast_frame *frr)
{
	struct ast_jb *jb = ast_channel_jb(chan);
	struct ast_jb_conf *jbconf = &jb->conf;
	const struct ast_jb_impl *jbimpl = jb->impl;
	void *jbobj;
	struct ast_channel *bridged;
	long now;
	char logfile_pathname[20 + AST_JB_IMPL_NAME_SIZE + 2*AST_CHANNEL_NAME + 1];
	char name1[AST_CHANNEL_NAME], name2[AST_CHANNEL_NAME], *tmp;
	int res;

	jbobj = jb->jbobj = jbimpl->create(jbconf, jbconf->resync_threshold);
	if (!jbobj) {
		ast_log(LOG_WARNING, "Failed to create jitterbuffer on channel '%s'\n", ast_channel_name(chan));
		return -1;
	}

	now = get_now(jb, NULL);
	res = jbimpl->put_first(jbobj, frr, now);

	/* The result of putting the first frame should not differ from OK. However, its possible
	   some implementations (i.e. adaptive's when resynch_threshold is specified) to drop it. */
	if (res != AST_JB_IMPL_OK) {
		ast_log(LOG_WARNING, "Failed to put first frame in the jitterbuffer on channel '%s'\n", ast_channel_name(chan));
		/*
		jbimpl->destroy(jbobj);
		return -1;
		*/
	}

	/* Init next */
	jb->next = jbimpl->next(jbobj);

	/* Init last format for a first time. */
	ast_format_copy(&jb->last_format, &frr->subclass.format);

	/* Create a frame log file */
	if (ast_test_flag(jbconf, AST_JB_LOG)) {
		char safe_logfile[30] = "/tmp/logfile-XXXXXX";
		int safe_fd;
		snprintf(name2, sizeof(name2), "%s", ast_channel_name(chan));
		if ((tmp = strchr(name2, '/'))) {
			*tmp = '#';
		}

		bridged = ast_bridged_channel(chan);
		/* We should always have bridged chan if a jitterbuffer is in use */
		ast_assert(bridged != NULL);

		snprintf(name1, sizeof(name1), "%s", ast_channel_name(bridged));
		if ((tmp = strchr(name1, '/'))) {
			*tmp = '#';
		}

		snprintf(logfile_pathname, sizeof(logfile_pathname),
			"/tmp/ast_%s_jb_%s--%s.log", jbimpl->name, name1, name2);
		unlink(logfile_pathname);
		safe_fd = mkstemp(safe_logfile);
		if (safe_fd < 0 || link(safe_logfile, logfile_pathname) || unlink(safe_logfile) || !(jb->logfile = fdopen(safe_fd, "w+b"))) {
			ast_log(LOG_ERROR, "Failed to create frame log file with pathname '%s': %s\n", logfile_pathname, strerror(errno));
			jb->logfile = NULL;
			if (safe_fd > -1) {
				close(safe_fd);
			}
		}

		if (res == AST_JB_IMPL_OK) {
			jb_framelog("JB_PUT_FIRST {now=%ld}: Queued frame with ts=%ld and len=%ld\n",
				now, frr->ts, frr->len);
		} else {
			jb_framelog("JB_PUT_FIRST {now=%ld}: Dropped frame with ts=%ld and len=%ld\n",
				now, frr->ts, frr->len);
		}
	}

	ast_verb(3, "%s jitterbuffer created on channel %s\n", jbimpl->name, ast_channel_name(chan));

	/* Free the frame if it has not been queued in the jb */
	if (res != AST_JB_IMPL_OK) {
		ast_frfree(frr);
	}

	return 0;
}
示例#12
0
int ast_jb_put(struct ast_channel *chan, struct ast_frame *f)
{
	struct ast_jb *jb = ast_channel_jb(chan);
	const struct ast_jb_impl *jbimpl = jb->impl;
	void *jbobj = jb->jbobj;
	struct ast_frame *frr;
	long now = 0;

	if (!ast_test_flag(jb, JB_USE))
		return -1;

	if (f->frametype != AST_FRAME_VOICE) {
		if (f->frametype == AST_FRAME_DTMF && ast_test_flag(jb, JB_CREATED)) {
			jb_framelog("JB_PUT {now=%ld}: Received DTMF frame. Force resynching jb...\n", now);
			jbimpl->force_resync(jbobj);
		}

		return -1;
	}

	/* We consider an enabled jitterbuffer should receive frames with valid timing info. */
	if (!ast_test_flag(f, AST_FRFLAG_HAS_TIMING_INFO) || f->len < 2 || f->ts < 0) {
		ast_log(LOG_WARNING, "%s received frame with invalid timing info: "
			"has_timing_info=%d, len=%ld, ts=%ld, src=%s\n",
			ast_channel_name(chan), ast_test_flag(f, AST_FRFLAG_HAS_TIMING_INFO), f->len, f->ts, f->src);
		return -1;
	}

	frr = ast_frdup(f);

	if (!frr) {
		ast_log(LOG_ERROR, "Failed to isolate frame for the jitterbuffer on channel '%s'\n", ast_channel_name(chan));
		return -1;
	}

	if (!ast_test_flag(jb, JB_CREATED)) {
		if (create_jb(chan, frr)) {
			ast_frfree(frr);
			/* Disable the jitterbuffer */
			ast_clear_flag(jb, JB_USE);
			return -1;
		}

		ast_set_flag(jb, JB_CREATED);
		return 0;
	} else {
		now = get_now(jb, NULL);
		if (jbimpl->put(jbobj, frr, now) != AST_JB_IMPL_OK) {
			jb_framelog("JB_PUT {now=%ld}: Dropped frame with ts=%ld and len=%ld\n", now, frr->ts, frr->len);
			ast_frfree(frr);
			/*return -1;*/
			/* TODO: Check this fix - should return 0 here, because the dropped frame shouldn't
			   be delivered at all */
			return 0;
		}

		jb->next = jbimpl->next(jbobj);

		jb_framelog("JB_PUT {now=%ld}: Queued frame with ts=%ld and len=%ld\n", now, frr->ts, frr->len);

		return 0;
	}
}