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Version 0.1.1 from FTP

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@137 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Mark Spencer
1999-12-16 00:19:15 +00:00
parent c0dfa24553
commit 2b1596f375
3 changed files with 518 additions and 26 deletions
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63
translate.c
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@@ -3,7 +3,7 @@
*
* Translate via the use of pseudo channels
*
* Copyright (C) 1999, Adtran Inc. and Linux Support Services, LLC
* Copyright (C) 1999, Mark Spencer
*
* Mark Spencer <markster@linux-support.net>
*
@@ -58,6 +58,8 @@ struct translator_pvt {
int comm[2];
struct ast_trans_pvt *system;
struct ast_trans_pvt *rsystem;
struct timeval lastpass;
pthread_t threadid;
};
static int translator_hangup(struct ast_channel *chan)
@@ -155,7 +157,6 @@ struct ast_trans_pvt *ast_translator_build_path(int source, int dest)
static struct ast_frame *fd_read(int fd)
{
/* XXX Wrong: Not thread safe! XXX */
char buf[4096];
int res;
struct ast_frame *f = (struct ast_frame *)buf;
@@ -166,8 +167,13 @@ static struct ast_frame *fd_read(int fd)
== sizeof(struct ast_frame)) {
/* read the frame header */
f->mallocd = 0;
/* Re-write data position */
f->data = buf + sizeof(struct ast_frame) + AST_FRIENDLY_OFFSET;
f->offset = AST_FRIENDLY_OFFSET;
/* Forget about being mallocd */
f->mallocd = 0;
/* Re-write the source */
f->src = __FUNCTION__;
if (f->datalen > sizeof(buf) - sizeof(struct ast_frame) - AST_FRIENDLY_OFFSET) {
/* Really bad read */
ast_log(LOG_WARNING, "Strange read (%d bytes)\n", f->datalen);
@@ -250,13 +256,14 @@ struct ast_frame_chain *ast_translate(struct ast_trans_pvt *path, struct ast_fra
return outc;
}
/* XXX There's an experimentally derived fudge factor XXX */
#define FUDGE 4
#define FUDGE 2
static void translator_apply(struct ast_trans_pvt *path, struct ast_frame *f, int fd, struct ast_channel *c)
static void translator_apply(struct ast_trans_pvt *path, struct ast_frame *f, int fd, struct ast_channel *c, struct timeval *last)
{
struct ast_trans_pvt *p;
struct ast_frame *out;
struct timeval tv;
int ms;
p = path;
/* Feed the first frame into the first translator */
p->step->framein(p->state, f);
@@ -267,11 +274,22 @@ static void translator_apply(struct ast_trans_pvt *path, struct ast_frame *f, in
/* Feed to next layer */
p->next->step->framein(p->next->state, out);
} else {
/* Delay if needed */
if (last->tv_sec || last->tv_usec) {
gettimeofday(&tv, NULL);
ms = 1000 * (tv.tv_sec - last->tv_sec) +
(tv.tv_usec - last->tv_usec) / 1000;
if (ms + FUDGE < out->timelen)
usleep((out->timelen - ms - FUDGE) * 1000);
last->tv_sec = tv.tv_sec;
last->tv_usec = tv.tv_usec;
}
if (c)
ast_write(c, out);
else
fd_write(fd, out);
}
ast_frfree(out);
}
p = p->next;
}
@@ -288,6 +306,8 @@ static void *translator_thread(void *data)
int res;
/* Read from the real, translate, write as necessary to the fake */
for(;;) {
/* Break here if need be */
pthread_testcancel();
if (!real->trans) {
ast_log(LOG_WARNING, "No translator anymore\n");
break;
@@ -299,6 +319,8 @@ static void *translator_thread(void *data)
CHECK_BLOCKING(real);
res = ast_waitfor_n_fd(fds, 2, &ms);
real->blocking = 0;
/* Or we can die here, that's fine too */
pthread_testcancel();
if (res >= 0) {
if (res == real->fd) {
f = ast_read(real);
@@ -309,7 +331,7 @@ static void *translator_thread(void *data)
}
if (f->frametype == AST_FRAME_VOICE) {
if (pvt->system)
translator_apply(pvt->system, f, fd, NULL);
translator_apply(pvt->system, f, fd, NULL, &pvt->lastpass);
} else {
/* If it's not voice, just pass it along */
fd_write(fd, f);
@@ -322,9 +344,10 @@ static void *translator_thread(void *data)
ast_log(LOG_DEBUG, "Empty (hangup) frame\n");
break;
}
if (f->frametype == AST_FRAME_VOICE) {
if (pvt->rsystem)
translator_apply(pvt->rsystem, f, -1, real);
translator_apply(pvt->rsystem, f, -1, real, &pvt->lastpass);
} else {
ast_write(real, f);
}
@@ -349,7 +372,6 @@ struct ast_channel *ast_translator_create(struct ast_channel *real, int format,
{
struct ast_channel *tmp;
struct translator_pvt *pvt;
pthread_t t;
if (real->trans) {
ast_log(LOG_WARNING, "Translator already exists on '%s'\n", real->name);
return NULL;
@@ -360,6 +382,8 @@ struct ast_channel *ast_translator_create(struct ast_channel *real, int format,
}
pvt->comm[0] = -1;
pvt->comm[1] = -1;
pvt->lastpass.tv_usec = 0;
pvt->lastpass.tv_sec = 0;
if (socketpair(AF_UNIX, SOCK_DGRAM, 0, pvt->comm)) {
ast_log(LOG_WARNING, "Unable to create UNIX domain socket on '%s'\n", real->name);
ast_translator_free(pvt);
@@ -404,10 +428,11 @@ struct ast_channel *ast_translator_create(struct ast_channel *real, int format,
tmp->pvt->answer = translator_answer;
tmp->pvt->read = translator_read;
tmp->pvt->write = translator_write;
tmp->pvt->pvt = pvt;
real->trans = tmp;
if (option_verbose > 2)
ast_verbose(VERBOSE_PREFIX_3 "Created translator %s\n", tmp->name);
if (pthread_create(&t, NULL, translator_thread, real) < 0) {
if (pthread_create(&pvt->threadid, NULL, translator_thread, real) < 0) {
ast_translator_destroy(tmp);
tmp = NULL;
ast_log(LOG_WARNING, "Failed to start thread\n");
@@ -550,8 +575,7 @@ int ast_unregister_translator(struct ast_translator *t)
void ast_translator_destroy(struct ast_channel *trans)
{
char dummy;
int ms = 1000;
struct translator_pvt *pvt;
if (!trans->master) {
ast_log(LOG_WARNING, "Translator is not part of a real channel?\n");
return;
@@ -561,19 +585,14 @@ void ast_translator_destroy(struct ast_channel *trans)
return;
}
trans->master->trans = NULL;
/* Write an invalid frame to kill off the main thread, which will
in turn acknowledge by writing an invalid frame back to us, unless
they're already closed. */
if (trans->fd > -1) {
if (write(trans->fd, trans, 1) == 1) {
/* Wait for a respnose, but no more than 1 second */
if (ast_waitfor_n_fd(&trans->fd, 1, &ms) == trans->fd)
read(trans->fd, &dummy, 1);
}
}
pvt = trans->pvt->pvt;
/* Cancel the running translator thread */
pthread_cancel(pvt->threadid);
pthread_join(pvt->threadid, NULL);
ast_translator_free(pvt);
trans->pvt->pvt = NULL;
if (option_verbose > 2)
ast_verbose(VERBOSE_PREFIX_3 "Destroyed translator %s\n", trans->name);
close(trans->fd);
ast_channel_free(trans);
}