--- /dev/null
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Old-style G.723 frame/timestamp format.
+ *
+ * Copyright (C) 1999, Adtran Inc. and Linux Support Services, LLC
+ *
+ * Mark Spencer <markster@linux-support.net>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+
+#include <asterisk/channel.h>
+#include <asterisk/file.h>
+#include <asterisk/logger.h>
+#include <asterisk/sched.h>
+#include <asterisk/module.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <pthread.h>
+#include <sys/time.h>
+#include "../channels/adtranvofr.h"
+
+
+#define G723_MAX_SIZE 1024
+
+struct ast_filestream {
+ /* First entry MUST be reserved for the channel type */
+ void *reserved[AST_RESERVED_POINTERS];
+ /* This is what a filestream means to us */
+ int fd; /* Descriptor */
+ u_int32_t lasttimeout; /* Last amount of timeout */
+ struct ast_channel *owner;
+ struct ast_filestream *next;
+ struct ast_frame *fr; /* Frame representation of buf */
+ struct timeval orig; /* Original frame time */
+ char buf[G723_MAX_SIZE + AST_FRIENDLY_OFFSET]; /* Buffer for sending frames, etc */
+};
+
+
+static struct ast_filestream *glist = NULL;
+static pthread_mutex_t g723_lock = PTHREAD_MUTEX_INITIALIZER;
+static int glistcnt = 0;
+
+static char *name = "g723sf";
+static char *desc = "G.723.1 Simple Timestamp File Format";
+static char *exts = "g723";
+
+static struct ast_filestream *g723_open(int fd)
+{
+ /* We don't have any header to read or anything really, but
+ if we did, it would go here. We also might want to check
+ and be sure it's a valid file. */
+ struct ast_filestream *tmp;
+ if ((tmp = malloc(sizeof(struct ast_filestream)))) {
+ if (pthread_mutex_lock(&g723_lock)) {
+ ast_log(LOG_WARNING, "Unable to lock g723 list\n");
+ free(tmp);
+ return NULL;
+ }
+ tmp->next = glist;
+ glist = tmp;
+ tmp->fd = fd;
+ tmp->owner = NULL;
+ tmp->fr = (struct ast_frame *)tmp->buf;
+ tmp->fr->data = tmp->buf + sizeof(struct ast_frame);
+ tmp->fr->frametype = AST_FRAME_VOICE;
+ tmp->fr->subclass = AST_FORMAT_G723_1;
+ /* datalen will vary for each frame */
+ tmp->fr->src = name;
+ tmp->fr->mallocd = 0;
+ tmp->lasttimeout = -1;
+ tmp->orig.tv_usec = 0;
+ tmp->orig.tv_sec = 0;
+ glistcnt++;
+ pthread_mutex_unlock(&g723_lock);
+ ast_update_use_count();
+ }
+ return tmp;
+}
+
+static struct ast_filestream *g723_rewrite(int fd, char *comment)
+{
+ /* We don't have any header to read or anything really, but
+ if we did, it would go here. We also might want to check
+ and be sure it's a valid file. */
+ struct ast_filestream *tmp;
+ if ((tmp = malloc(sizeof(struct ast_filestream)))) {
+ if (pthread_mutex_lock(&g723_lock)) {
+ ast_log(LOG_WARNING, "Unable to lock g723 list\n");
+ free(tmp);
+ return NULL;
+ }
+ tmp->next = glist;
+ glist = tmp;
+ tmp->fd = fd;
+ tmp->owner = NULL;
+ tmp->fr = NULL;
+ tmp->lasttimeout = -1;
+ glistcnt++;
+ pthread_mutex_unlock(&g723_lock);
+ ast_update_use_count();
+ } else
+ ast_log(LOG_WARNING, "Out of memory\n");
+ return tmp;
+}
+
+static struct ast_frame *g723_read(struct ast_filestream *s)
+{
+ return NULL;
+}
+
+static void g723_close(struct ast_filestream *s)
+{
+ struct ast_filestream *tmp, *tmpl = NULL;
+ if (pthread_mutex_lock(&g723_lock)) {
+ ast_log(LOG_WARNING, "Unable to lock g723 list\n");
+ return;
+ }
+ tmp = glist;
+ while(tmp) {
+ if (tmp == s) {
+ if (tmpl)
+ tmpl->next = tmp->next;
+ else
+ glist = tmp->next;
+ break;
+ }
+ tmpl = tmp;
+ tmp = tmp->next;
+ }
+ glistcnt--;
+ if (s->owner) {
+ s->owner->stream = NULL;
+ if (s->owner->streamid > -1)
+ ast_sched_del(s->owner->sched, s->owner->streamid);
+ s->owner->streamid = -1;
+ }
+ pthread_mutex_unlock(&g723_lock);
+ ast_update_use_count();
+ if (!tmp)
+ ast_log(LOG_WARNING, "Freeing a filestream we don't seem to own\n");
+ close(s->fd);
+ free(s);
+}
+
+static int ast_read_callback(void *data)
+{
+ u_int16_t size;
+ u_int32_t delay = -1;
+ int looper = 1;
+ int retval = 0;
+ int res;
+ struct ast_filestream *s = data;
+ /* Send a frame from the file to the appropriate channel */
+ while(looper) {
+ if (read(s->fd, &size, 2) != 2) {
+ /* Out of data, or the file is no longer valid. In any case
+ go ahead and stop the stream */
+ s->owner->streamid = -1;
+ return 0;
+ }
+ /* Looks like we have a frame to read from here */
+ size = ntohs(size);
+ if (size > G723_MAX_SIZE - sizeof(struct ast_frame)) {
+ ast_log(LOG_WARNING, "Size %d is invalid\n", size);
+ /* The file is apparently no longer any good, as we
+ shouldn't ever get frames even close to this
+ size. */
+ s->owner->streamid = -1;
+ return 0;
+ }
+ /* Read the data into the buffer */
+ s->fr->offset = AST_FRIENDLY_OFFSET;
+ s->fr->datalen = size;
+ s->fr->data = s->buf + sizeof(struct ast_frame) + AST_FRIENDLY_OFFSET;
+ if ((res = read(s->fd, s->fr->data , size)) != size) {
+ ast_log(LOG_WARNING, "Short read (%d of %d bytes) (%s)!\n", res, size, strerror(errno));
+ s->owner->streamid = -1;
+ return 0;
+ }
+ /* Read the delay for the next packet, and schedule again if necessary */
+ if (read(s->fd, &delay, 4) == 4)
+ delay = ntohl(delay);
+ else
+ delay = -1;
+ /* Average out frames <= 40 ms */
+ if (delay < 41)
+ s->fr->timelen = 30;
+ else
+ s->fr->timelen = delay;
+ /* Unless there is no delay, we're going to exit out as soon as we
+ have processed the current frame. */
+ if (delay > VOFR_FUDGE) {
+ looper = 0;
+ /* If there is a delay, lets schedule the next event */
+ if (delay != s->lasttimeout) {
+ /* We'll install the next timeout now. */
+ s->owner->streamid = ast_sched_add(s->owner->sched,
+ delay - VOFR_FUDGE,
+ ast_read_callback, s);
+
+ s->lasttimeout = delay;
+ } else
+ /* Just come back again at the same time */
+ retval = -1;
+ }
+ /* Lastly, process the frame */
+ if (ast_write(s->owner, s->fr)) {
+ ast_log(LOG_WARNING, "Failed to write frame\n");
+ s->owner->streamid = -1;
+ return 0;
+ }
+ }
+ return retval;
+}
+
+static int g723_apply(struct ast_channel *c, struct ast_filestream *s)
+{
+ u_int32_t delay;
+ /* Select our owner for this stream, and get the ball rolling. */
+ s->owner = c;
+ /* Read and ignore the first delay */
+ if (read(s->fd, &delay, 4) != 4) {
+ ast_log(LOG_WARNING, "Bad stream?\n");
+ return -1;
+ }
+ ast_read_callback(s);
+ return 0;
+}
+
+static int g723_write(struct ast_filestream *fs, struct ast_frame *f)
+{
+ struct timeval now;
+ u_int32_t delay;
+ u_int16_t size;
+ int res;
+ if (fs->fr) {
+ ast_log(LOG_WARNING, "Asked to write on a read stream??\n");
+ return -1;
+ }
+ if (f->frametype != AST_FRAME_VOICE) {
+ ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
+ return -1;
+ }
+ if (f->subclass != AST_FORMAT_G723_1) {
+ ast_log(LOG_WARNING, "Asked to write non-g723 frame!\n");
+ return -1;
+ }
+ if (!(fs->orig.tv_usec || fs->orig.tv_sec)) {
+ /* First frame should have zeros for delay */
+ delay = 0;
+ if (gettimeofday(&fs->orig, NULL)) {
+ ast_log(LOG_WARNING, "gettimeofday() failed?? What is this? Y2k?\n");
+ return -1;
+ }
+ } else {
+ if (gettimeofday(&now, NULL)) {
+ ast_log(LOG_WARNING, "gettimeofday() failed?? What is this? Y2k?\n");
+ return -1;
+ }
+ delay = (now.tv_sec - fs->orig.tv_sec) * 1000 + (now.tv_usec - fs->orig.tv_usec) / 1000;
+ delay = htonl(delay);
+ fs->orig.tv_sec = now.tv_sec;
+ fs->orig.tv_usec = now.tv_usec;
+ }
+ if ((res = write(fs->fd, &delay, 4)) != 4) {
+ ast_log(LOG_WARNING, "Unable to write delay: res=%d (%s)\n", res, strerror(errno));
+ return -1;
+ }
+ size = htons(f->datalen);
+ if ((res =write(fs->fd, &size, 2)) != 2) {
+ ast_log(LOG_WARNING, "Unable to write size: res=%d (%s)\n", res, strerror(errno));
+ return -1;
+ }
+ if ((res = write(fs->fd, f->data, f->datalen)) != f->datalen) {
+ ast_log(LOG_WARNING, "Unable to write frame: res=%d (%s)\n", res, strerror(errno));
+ return -1;
+ }
+ return 0;
+}
+
+char *g723_getcomment(struct ast_filestream *s)
+{
+ return NULL;
+}
+
+int load_module()
+{
+ return ast_format_register(name, exts, AST_FORMAT_G723_1,
+ g723_open,
+ g723_rewrite,
+ g723_apply,
+ g723_write,
+ g723_read,
+ g723_close,
+ g723_getcomment);
+
+
+}
+
+int unload_module()
+{
+ struct ast_filestream *tmp, *tmpl;
+ if (pthread_mutex_lock(&g723_lock)) {
+ ast_log(LOG_WARNING, "Unable to lock g723 list\n");
+ return -1;
+ }
+ tmp = glist;
+ while(tmp) {
+ if (tmp->owner)
+ ast_softhangup(tmp->owner);
+ tmpl = tmp;
+ tmp = tmp->next;
+ free(tmpl);
+ }
+ pthread_mutex_unlock(&g723_lock);
+ return ast_format_unregister(name);
+}
+
+int usecount()
+{
+ int res;
+ if (pthread_mutex_lock(&g723_lock)) {
+ ast_log(LOG_WARNING, "Unable to lock g723 list\n");
+ return -1;
+ }
+ res = glistcnt;
+ pthread_mutex_unlock(&g723_lock);
+ return res;
+}
+
+char *description()
+{
+ return desc;
+}
+
projects / asterisk/asterisk.git / commitdiff