file.c

	if (!breakon) breakon = "";
	while(c->stream) {
		res = ast_sched_wait(c->sched);
		if ((res < 0) && !c->timingfunc) {
			ast_stopstream(c);
			break;
		}
		if (res < 0)
			res = 1000;
		res = ast_waitfor(c, res);
		if (res < 0) {
			ast_log(LOG_WARNING, "Select failed (%s)\n", strerror(errno));
			return res;
		} else if (res > 0) {
			fr = ast_read(c);
			if (!fr) {
#if 0
				ast_log(LOG_DEBUG, "Got hung up\n");
#endif
				return -1;
			}
			
			switch(fr->frametype) {
			case AST_FRAME_DTMF:
				res = fr->subclass;
				if (strchr(breakon, res)) {
					ast_frfree(fr);
					return res;
				}
				break;
			case AST_FRAME_CONTROL:
				switch(fr->subclass) {
				case AST_CONTROL_HANGUP:
					ast_frfree(fr);
					return -1;
				case AST_CONTROL_RINGING:
				case AST_CONTROL_ANSWER:
				case AST_CONTROL_VIDUPDATE:
					/* Unimportant */
					break;
				default:
					ast_log(LOG_WARNING, "Unexpected control subclass '%d'\n", fr->subclass);
				}
			}
			/* Ignore */
			ast_frfree(fr);
		}
		ast_sched_runq(c->sched);
	}
	return (c->_softhangup ? -1 : 0);
}

int ast_waitstream_fr(struct ast_channel *c, const char *breakon, const char *forward, const char *rewind, int ms)
{
	int res;
	struct ast_frame *fr;

	if (!breakon)
			breakon = "";
	if (!forward)
			forward = "";
	if (!rewind)
			rewind = "";
	
	while(c->stream) {
		res = ast_sched_wait(c->sched);
		if ((res < 0) && !c->timingfunc) {
			ast_stopstream(c);
			break;
		}
		if (res < 0)
			res = 1000;
		res = ast_waitfor(c, res);
		if (res < 0) {
			ast_log(LOG_WARNING, "Select failed (%s)\n", strerror(errno));
			return res;
		} else
		if (res > 0) {
			fr = ast_read(c);
			if (!fr) {
#if 0
				ast_log(LOG_DEBUG, "Got hung up\n");
#endif
				return -1;
			}
			
			switch(fr->frametype) {
			case AST_FRAME_DTMF:
				res = fr->subclass;
				if (strchr(forward,res)) {
					ast_stream_fastforward(c->stream, ms);
				} else if (strchr(rewind,res)) {
					ast_stream_rewind(c->stream, ms);
				} else if (strchr(breakon, res)) {
					ast_frfree(fr);
					return res;
				}					
				break;
			case AST_FRAME_CONTROL:
				switch(fr->subclass) {
				case AST_CONTROL_HANGUP:
					ast_frfree(fr);
					return -1;
				case AST_CONTROL_RINGING:
				case AST_CONTROL_ANSWER:
					/* Unimportant */
					break;
				default:
					ast_log(LOG_WARNING, "Unexpected control subclass '%d'\n", fr->subclass);
				}
			}
			/* Ignore */
			ast_frfree(fr);
		} else
			ast_sched_runq(c->sched);
	
		
	}
	return (c->_softhangup ? -1 : 0);
}

int ast_waitstream_full(struct ast_channel *c, const char *breakon, int audiofd, int cmdfd)
{
	int res;
	int ms;
	int outfd;
	struct ast_frame *fr;
	struct ast_channel *rchan;

	if (!breakon)
		breakon = "";
	
	while(c->stream) {
		ms = ast_sched_wait(c->sched);
		if ((ms < 0) && !c->timingfunc) {
			ast_stopstream(c);
			break;
		}
		if (ms < 0)
			ms = 1000;
		rchan = ast_waitfor_nandfds(&c, 1, &cmdfd, (cmdfd > -1) ? 1 : 0, NULL, &outfd, &ms);
		if (!rchan && (outfd < 0) && (ms)) {
			/* Continue */
			if (errno == EINTR)
				continue;
			ast_log(LOG_WARNING, "Wait failed (%s)\n", strerror(errno));
			return -1;
		} else if (outfd > -1) {
			/* The FD we were watching has something waiting */
			return 1;
		} else if (rchan) {
			fr = ast_read(c);
			if (!fr) {
#if 0
				ast_log(LOG_DEBUG, "Got hung up\n");
#endif
				return -1;
			}
			
			switch(fr->frametype) {
			case AST_FRAME_DTMF:
				res = fr->subclass;
				if (strchr(breakon, res)) {
					ast_frfree(fr);
					return res;
				}
				break;
			case AST_FRAME_CONTROL:
				switch(fr->subclass) {
				case AST_CONTROL_HANGUP:
					ast_frfree(fr);
					return -1;
				case AST_CONTROL_RINGING:
				case AST_CONTROL_ANSWER:
					/* Unimportant */
					break;
				default:
					ast_log(LOG_WARNING, "Unexpected control subclass '%d'\n", fr->subclass);
				}
			case AST_FRAME_VOICE:
				/* Write audio if appropriate */
				if (audiofd > -1)
					write(audiofd, fr->data, fr->datalen);
			}
			/* Ignore */
			ast_frfree(fr);
		}
		ast_sched_runq(c->sched);
	}
	return (c->_softhangup ? -1 : 0);
}

int ast_waitstream_exten(struct ast_channel *c, const char *context)
{
	/* Waitstream, with return in the case of a valid 1 digit extension */
	/* in the current or specified context being pressed */
	/* XXX Maybe I should just front-end ast_waitstream_full ? XXX */
	int res;
	struct ast_frame *fr;
	char exten[AST_MAX_EXTENSION];

	if (!context) context = c->context;
	while(c->stream) {
		res = ast_sched_wait(c->sched);
		if ((res < 0) && !c->timingfunc) {
			ast_stopstream(c);
			break;
		}
		if (res < 0)
			res = 1000;
		res = ast_waitfor(c, res);
		if (res < 0) {
			ast_log(LOG_WARNING, "Select failed (%s)\n", strerror(errno));
			return res;
		} else if (res > 0) {
			fr = ast_read(c);
			if (!fr) {
#if 0
				ast_log(LOG_DEBUG, "Got hung up\n");
#endif
				return -1;
			}
			
			switch(fr->frametype) {
			case AST_FRAME_DTMF:
				res = fr->subclass;
				snprintf(exten, sizeof(exten), "%c", res);
				if (ast_exists_extension(c, context, exten, 1, c->cid.cid_num)) {
					ast_frfree(fr);
					return res;
				}
				break;
			case AST_FRAME_CONTROL:
				switch(fr->subclass) {
				case AST_CONTROL_HANGUP:
					ast_frfree(fr);
					return -1;
				case AST_CONTROL_RINGING:
				case AST_CONTROL_ANSWER:
					/* Unimportant */
					break;
				default:
					ast_log(LOG_WARNING, "Unexpected control subclass '%d'\n", fr->subclass);
				}
			}
			/* Ignore */
			ast_frfree(fr);
		}
		ast_sched_runq(c->sched);
	}
	return (c->_softhangup ? -1 : 0);
}

static int show_file_formats(int fd, int argc, char *argv[])
{
#define FORMAT "%-10s %-10s %-20s\n"
#define FORMAT2 "%-10s %-10s %-20s\n"
	struct ast_format *f;
	int count_fmt = 0;

	if (argc != 3)
		return RESULT_SHOWUSAGE;
	ast_cli(fd, FORMAT, "Format", "Name", "Extensions");
	        
	if (AST_LIST_LOCK(&formats)) {
		ast_log(LOG_WARNING, "Unable to lock format list\n");
		return -1;
	}

	AST_LIST_TRAVERSE(&formats, f, list) {
		ast_cli(fd, FORMAT2, ast_getformatname(f->format), f->name, f->exts);
		count_fmt++;
	}
	AST_LIST_UNLOCK(&formats);
	ast_cli(fd, "%d file formats registered.\n", count_fmt);
	return RESULT_SUCCESS;
#undef FORMAT
#undef FORMAT2
	
}

struct ast_cli_entry show_file =
{
	{ "show", "file", "formats" },
	show_file_formats,
	"Displays file formats",
	"Usage: show file formats\n"
	"       displays currently registered file formats (if any)\n"
};

int ast_file_init(void)
{
	ast_cli_register(&show_file);
	return 0;
}