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520 lines
13 KiB
520 lines
13 KiB
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2002, Christos Ricudis
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*
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* Christos Ricudis <ricudis@itc.auth.gr>
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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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/*! \file
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*
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* \brief Connect to festival
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*
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* \ingroup applications
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*/
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#include <sys/types.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <stdio.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <ctype.h>
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/file.h"
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#include "asterisk/logger.h"
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#include "asterisk/channel.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/md5.h"
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#include "asterisk/config.h"
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#include "asterisk/utils.h"
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#include "asterisk/lock.h"
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#define FESTIVAL_CONFIG "festival.conf"
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static char *tdesc = "Simple Festival Interface";
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static char *app = "Festival";
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static char *synopsis = "Say text to the user";
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static char *descrip =
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" Festival(text[|intkeys]): Connect to Festival, send the argument, get back the waveform,"
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"play it to the user, allowing any given interrupt keys to immediately terminate and return\n"
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"the value, or 'any' to allow any number back (useful in dialplan)\n";
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STANDARD_LOCAL_USER;
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LOCAL_USER_DECL;
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static char *socket_receive_file_to_buff(int fd,int *size)
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{
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/* Receive file (probably a waveform file) from socket using */
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/* Festival key stuff technique, but long winded I know, sorry */
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/* but will receive any file without closeing the stream or */
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/* using OOB data */
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static char *file_stuff_key = "ft_StUfF_key"; /* must == Festival's key */
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char *buff;
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int bufflen;
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int n,k,i;
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char c;
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bufflen = 1024;
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buff = (char *)malloc(bufflen);
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*size=0;
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for (k=0; file_stuff_key[k] != '\0';)
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{
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n = read(fd,&c,1);
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if (n==0) break; /* hit stream eof before end of file */
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if ((*size)+k+1 >= bufflen)
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{ /* +1 so you can add a NULL if you want */
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bufflen += bufflen/4;
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buff = (char *)realloc(buff,bufflen);
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}
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if (file_stuff_key[k] == c)
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k++;
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else if ((c == 'X') && (file_stuff_key[k+1] == '\0'))
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{ /* It looked like the key but wasn't */
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for (i=0; i < k; i++,(*size)++)
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buff[*size] = file_stuff_key[i];
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k=0;
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/* omit the stuffed 'X' */
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}
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else
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{
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for (i=0; i < k; i++,(*size)++)
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buff[*size] = file_stuff_key[i];
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k=0;
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buff[*size] = c;
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(*size)++;
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}
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}
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return buff;
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}
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static int send_waveform_to_fd(char *waveform, int length, int fd) {
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int res;
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int x;
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#ifdef __PPC__
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char c;
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#endif
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res = fork();
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if (res < 0)
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ast_log(LOG_WARNING, "Fork failed\n");
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if (res)
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return res;
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for (x=0;x<256;x++) {
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if (x != fd)
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close(x);
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}
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/*IAS */
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#ifdef __PPC__
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for( x=0; x<length; x+=2)
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{
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c = *(waveform+x+1);
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*(waveform+x+1)=*(waveform+x);
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*(waveform+x)=c;
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}
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#endif
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write(fd,waveform,length);
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close(fd);
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exit(0);
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}
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static int send_waveform_to_channel(struct ast_channel *chan, char *waveform, int length, char *intkeys) {
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int res=0;
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int fds[2];
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int ms = -1;
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int pid = -1;
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int needed = 0;
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int owriteformat;
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struct ast_frame *f;
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struct myframe {
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struct ast_frame f;
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char offset[AST_FRIENDLY_OFFSET];
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char frdata[2048];
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} myf;
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if (pipe(fds)) {
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ast_log(LOG_WARNING, "Unable to create pipe\n");
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return -1;
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}
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/* Answer if it's not already going */
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if (chan->_state != AST_STATE_UP)
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ast_answer(chan);
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ast_stopstream(chan);
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owriteformat = chan->writeformat;
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res = ast_set_write_format(chan, AST_FORMAT_SLINEAR);
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if (res < 0) {
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ast_log(LOG_WARNING, "Unable to set write format to signed linear\n");
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return -1;
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}
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res=send_waveform_to_fd(waveform,length,fds[1]);
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if (res >= 0) {
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pid = res;
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/* Order is important -- there's almost always going to be mp3... we want to prioritize the
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user */
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for (;;) {
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ms = 1000;
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res = ast_waitfor(chan, ms);
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if (res < 1) {
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res = -1;
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break;
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}
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f = ast_read(chan);
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if (!f) {
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ast_log(LOG_WARNING, "Null frame == hangup() detected\n");
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res = -1;
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break;
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}
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if (f->frametype == AST_FRAME_DTMF) {
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ast_log(LOG_DEBUG, "User pressed a key\n");
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if (intkeys && strchr(intkeys, f->subclass)) {
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res = f->subclass;
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ast_frfree(f);
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break;
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}
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}
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if (f->frametype == AST_FRAME_VOICE) {
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/* Treat as a generator */
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needed = f->samples * 2;
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if (needed > sizeof(myf.frdata)) {
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ast_log(LOG_WARNING, "Only able to deliver %d of %d requested samples\n",
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(int)sizeof(myf.frdata) / 2, needed/2);
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needed = sizeof(myf.frdata);
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}
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res = read(fds[0], myf.frdata, needed);
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if (res > 0) {
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myf.f.frametype = AST_FRAME_VOICE;
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myf.f.subclass = AST_FORMAT_SLINEAR;
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myf.f.datalen = res;
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myf.f.samples = res / 2;
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myf.f.mallocd = 0;
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myf.f.offset = AST_FRIENDLY_OFFSET;
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myf.f.src = __PRETTY_FUNCTION__;
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myf.f.data = myf.frdata;
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if (ast_write(chan, &myf.f) < 0) {
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res = -1;
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break;
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}
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if (res < needed) { /* last frame */
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ast_log(LOG_DEBUG, "Last frame\n");
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res=0;
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break;
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}
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} else {
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ast_log(LOG_DEBUG, "No more waveform\n");
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res = 0;
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}
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}
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ast_frfree(f);
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}
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}
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close(fds[0]);
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close(fds[1]);
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/* if (pid > -1) */
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/* kill(pid, SIGKILL); */
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if (!res && owriteformat)
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ast_set_write_format(chan, owriteformat);
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return res;
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}
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#define MAXLEN 180
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#define MAXFESTLEN 2048
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static int festival_exec(struct ast_channel *chan, void *vdata)
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{
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int usecache;
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int res=0;
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struct localuser *u;
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struct sockaddr_in serv_addr;
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struct hostent *serverhost;
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struct ast_hostent ahp;
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int fd;
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FILE *fs;
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char *host;
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char *cachedir;
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char *temp;
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char *festivalcommand;
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int port=1314;
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int n;
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char ack[4];
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char *waveform;
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int filesize;
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int wave;
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char bigstring[MAXFESTLEN];
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int i;
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struct MD5Context md5ctx;
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unsigned char MD5Res[16];
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char MD5Hex[33] = "";
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char koko[4] = "";
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char cachefile[MAXFESTLEN]="";
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int readcache=0;
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int writecache=0;
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int strln;
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int fdesc = -1;
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char buffer[16384];
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int seekpos = 0;
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char *data;
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char *intstr;
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struct ast_config *cfg;
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if (ast_strlen_zero(vdata)) {
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ast_log(LOG_WARNING, "festival requires an argument (text)\n");
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return -1;
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}
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LOCAL_USER_ADD(u);
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cfg = ast_config_load(FESTIVAL_CONFIG);
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if (!cfg) {
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ast_log(LOG_WARNING, "No such configuration file %s\n", FESTIVAL_CONFIG);
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LOCAL_USER_REMOVE(u);
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return -1;
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}
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if (!(host = ast_variable_retrieve(cfg, "general", "host"))) {
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host = "localhost";
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}
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if (!(temp = ast_variable_retrieve(cfg, "general", "port"))) {
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port = 1314;
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} else {
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port = atoi(temp);
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}
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if (!(temp = ast_variable_retrieve(cfg, "general", "usecache"))) {
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usecache=0;
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} else {
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usecache = ast_true(temp);
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}
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if (!(cachedir = ast_variable_retrieve(cfg, "general", "cachedir"))) {
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cachedir = "/tmp/";
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}
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if (!(festivalcommand = ast_variable_retrieve(cfg, "general", "festivalcommand"))) {
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festivalcommand = "(tts_textasterisk \"%s\" 'file)(quit)\n";
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}
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data = ast_strdupa(vdata);
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if (!data) {
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ast_log(LOG_ERROR, "Out of memery\n");
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ast_config_destroy(cfg);
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LOCAL_USER_REMOVE(u);
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return -1;
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}
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intstr = strchr(data, '|');
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if (intstr) {
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*intstr = '\0';
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intstr++;
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if (!strcasecmp(intstr, "any"))
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intstr = AST_DIGIT_ANY;
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}
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ast_log(LOG_DEBUG, "Text passed to festival server : %s\n",(char *)data);
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/* Connect to local festival server */
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fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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if (fd < 0) {
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ast_log(LOG_WARNING,"festival_client: can't get socket\n");
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ast_config_destroy(cfg);
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LOCAL_USER_REMOVE(u);
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return -1;
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}
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memset(&serv_addr, 0, sizeof(serv_addr));
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if ((serv_addr.sin_addr.s_addr = inet_addr(host)) == -1) {
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/* its a name rather than an ipnum */
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serverhost = ast_gethostbyname(host, &ahp);
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if (serverhost == (struct hostent *)0) {
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ast_log(LOG_WARNING,"festival_client: gethostbyname failed\n");
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ast_config_destroy(cfg);
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LOCAL_USER_REMOVE(u);
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return -1;
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}
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memmove(&serv_addr.sin_addr,serverhost->h_addr, serverhost->h_length);
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}
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serv_addr.sin_family = AF_INET;
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serv_addr.sin_port = htons(port);
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if (connect(fd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) != 0) {
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ast_log(LOG_WARNING,"festival_client: connect to server failed\n");
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ast_config_destroy(cfg);
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LOCAL_USER_REMOVE(u);
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return -1;
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}
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/* Compute MD5 sum of string */
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MD5Init(&md5ctx);
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MD5Update(&md5ctx,(unsigned char const *)data,strlen(data));
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MD5Final(MD5Res,&md5ctx);
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MD5Hex[0] = '\0';
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/* Convert to HEX and look if there is any matching file in the cache
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directory */
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for (i=0;i<16;i++) {
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snprintf(koko, sizeof(koko), "%X",MD5Res[i]);
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strncat(MD5Hex, koko, sizeof(MD5Hex) - strlen(MD5Hex) - 1);
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}
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readcache=0;
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writecache=0;
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if (strlen(cachedir)+strlen(MD5Hex)+1<=MAXFESTLEN && (usecache==-1)) {
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snprintf(cachefile, sizeof(cachefile), "%s/%s", cachedir, MD5Hex);
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fdesc=open(cachefile,O_RDWR);
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if (fdesc==-1) {
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fdesc=open(cachefile,O_CREAT|O_RDWR,0777);
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if (fdesc!=-1) {
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writecache=1;
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strln=strlen((char *)data);
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ast_log(LOG_DEBUG,"line length : %d\n",strln);
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write(fdesc,&strln,sizeof(int));
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write(fdesc,data,strln);
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seekpos=lseek(fdesc,0,SEEK_CUR);
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ast_log(LOG_DEBUG,"Seek position : %d\n",seekpos);
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}
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} else {
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read(fdesc,&strln,sizeof(int));
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ast_log(LOG_DEBUG,"Cache file exists, strln=%d, strlen=%d\n",strln,(int)strlen((char *)data));
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if (strlen((char *)data)==strln) {
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ast_log(LOG_DEBUG,"Size OK\n");
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read(fdesc,&bigstring,strln);
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bigstring[strln] = 0;
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if (strcmp(bigstring,data)==0) {
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readcache=1;
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} else {
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ast_log(LOG_WARNING,"Strings do not match\n");
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}
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} else {
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ast_log(LOG_WARNING,"Size mismatch\n");
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}
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}
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}
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if (readcache==1) {
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close(fd);
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fd=fdesc;
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ast_log(LOG_DEBUG,"Reading from cache...\n");
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} else {
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ast_log(LOG_DEBUG,"Passing text to festival...\n");
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fs=fdopen(dup(fd),"wb");
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fprintf(fs,festivalcommand,(char *)data);
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fflush(fs);
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fclose(fs);
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}
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/* Write to cache and then pass it down */
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if (writecache==1) {
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ast_log(LOG_DEBUG,"Writing result to cache...\n");
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while ((strln=read(fd,buffer,16384))!=0) {
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write(fdesc,buffer,strln);
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}
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close(fd);
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close(fdesc);
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fd=open(cachefile,O_RDWR);
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lseek(fd,seekpos,SEEK_SET);
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}
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ast_log(LOG_DEBUG,"Passing data to channel...\n");
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/* Read back info from server */
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/* This assumes only one waveform will come back, also LP is unlikely */
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wave = 0;
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do {
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for (n=0; n < 3; )
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n += read(fd,ack+n,3-n);
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ack[3] = '\0';
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if (strcmp(ack,"WV\n") == 0) { /* receive a waveform */
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ast_log(LOG_DEBUG,"Festival WV command\n");
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waveform = socket_receive_file_to_buff(fd,&filesize);
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res = send_waveform_to_channel(chan,waveform,filesize, intstr);
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free(waveform);
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break;
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}
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else if (strcmp(ack,"LP\n") == 0) { /* receive an s-expr */
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ast_log(LOG_DEBUG,"Festival LP command\n");
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waveform = socket_receive_file_to_buff(fd,&filesize);
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waveform[filesize]='\0';
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ast_log(LOG_WARNING,"Festival returned LP : %s\n",waveform);
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free(waveform);
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} else if (strcmp(ack,"ER\n") == 0) { /* server got an error */
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ast_log(LOG_WARNING,"Festival returned ER\n");
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res=-1;
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break;
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}
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} while (strcmp(ack,"OK\n") != 0);
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close(fd);
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ast_config_destroy(cfg);
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LOCAL_USER_REMOVE(u);
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return res;
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}
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int unload_module(void)
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{
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int res;
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res = ast_unregister_application(app);
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STANDARD_HANGUP_LOCALUSERS;
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return res;
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}
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int load_module(void)
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{
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return ast_register_application(app, festival_exec, synopsis, descrip);
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}
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char *description(void)
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{
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return tdesc;
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}
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int usecount(void)
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{
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int res;
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STANDARD_USECOUNT(res);
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return res;
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}
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char *key()
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{
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return ASTERISK_GPL_KEY;
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}
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