Version 0.1.1 from FTP

git-svn-id: http://svn.digium.com/svn/asterisk/trunk@139 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 586 insertions, 0 deletions

diff --git a/formats/format_wav_gsm.c b/formats/format_wav_gsm.c
new file mode 100755
index 000000000..b901a4028
--- /dev/null
+++ b/formats/format_wav_gsm.c
@@ -0,0 +1,586 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Save GSM in the proprietary Microsoft format.
+ * 
+ * Copyright (C) 1999, Mark Spencer
+ *
+ * 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 <sys/time.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <pthread.h>
+#include <endian.h>
+#include "msgsm.h"
+
+/* Some Ideas for this code came from makewave.c by Jeffery Chilton */
+
+/* Portions of the conversion code are by guido@sienanet.it */
+
+struct ast_filestream {
+	void *reserved[AST_RESERVED_POINTERS];
+	/* Believe it or not, we must decode/recode to account for the
+	   weird MS format */
+	/* This is what a filestream means to us */
+	int fd; /* Descriptor */
+	int bytes;
+	struct ast_channel *owner;
+	struct ast_frame fr;				/* Frame information */
+	char waste[AST_FRIENDLY_OFFSET];	/* Buffer for sending frames, etc */
+	char empty;							/* Empty character */
+	unsigned char gsm[66];				/* Two Real GSM Frames */
+	int foffset;
+	int secondhalf;						/* Are we on the second half */
+	int lasttimeout;
+	struct timeval last;
+	int adj;
+	struct ast_filestream *next;
+};
+
+
+static struct ast_filestream *glist = NULL;
+static pthread_mutex_t wav_lock = PTHREAD_MUTEX_INITIALIZER;
+static int glistcnt = 0;
+
+static char *name = "wav49";
+static char *desc = "Microsoft WAV format (Proprietary GSM)";
+static char *exts = "WAV";
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define htoll(b) (b)
+#define htols(b) (b)
+#define ltohl(b) (b)
+#define ltohs(b) (b)
+#else
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define htoll(b)  \
+          (((((b)      ) & 0xFF) << 24) | \
+	       ((((b) >>  8) & 0xFF) << 16) | \
+		   ((((b) >> 16) & 0xFF) <<  8) | \
+		   ((((b) >> 24) & 0xFF)      ))
+#define htols(b) \
+          (((((b)      ) & 0xFF) << 8) | \
+		   ((((b) >> 8) & 0xFF)      ))
+#define ltohl(b) htoll(b)
+#define ltohs(b) htols(b)
+#else
+#error "Endianess not defined"
+#endif
+#endif
+
+
+static int check_header(int fd)
+{
+	int type, size, formtype;
+	int fmt, hsize, fact;
+	short format, chans;
+	int freq;
+	int data;
+	if (read(fd, &type, 4) != 4) {
+		ast_log(LOG_WARNING, "Read failed (type)\n");
+		return -1;
+	}
+	if (read(fd, &size, 4) != 4) {
+		ast_log(LOG_WARNING, "Read failed (size)\n");
+		return -1;
+	}
+	size = ltohl(size);
+	if (read(fd, &formtype, 4) != 4) {
+		ast_log(LOG_WARNING, "Read failed (formtype)\n");
+		return -1;
+	}
+	if (memcmp(&type, "RIFF", 4)) {
+		ast_log(LOG_WARNING, "Does not begin with RIFF\n");
+		return -1;
+	}
+	if (memcmp(&formtype, "WAVE", 4)) {
+		ast_log(LOG_WARNING, "Does not contain WAVE\n");
+		return -1;
+	}
+	if (read(fd, &fmt, 4) != 4) {
+		ast_log(LOG_WARNING, "Read failed (fmt)\n");
+		return -1;
+	}
+	if (memcmp(&fmt, "fmt ", 4)) {
+		ast_log(LOG_WARNING, "Does not say fmt\n");
+		return -1;
+	}
+	if (read(fd, &hsize, 4) != 4) {
+		ast_log(LOG_WARNING, "Read failed (formtype)\n");
+		return -1;
+	}
+	if (ltohl(hsize) != 20) {
+		ast_log(LOG_WARNING, "Unexpected header size %d\n", ltohl(hsize));
+		return -1;
+	}
+	if (read(fd, &format, 2) != 2) {
+		ast_log(LOG_WARNING, "Read failed (format)\n");
+		return -1;
+	}
+	if (ltohs(format) != 49) {
+		ast_log(LOG_WARNING, "Not a GSM file %d\n", ltohs(format));
+		return -1;
+	}
+	if (read(fd, &chans, 2) != 2) {
+		ast_log(LOG_WARNING, "Read failed (format)\n");
+		return -1;
+	}
+	if (ltohs(chans) != 1) {
+		ast_log(LOG_WARNING, "Not in mono %d\n", ltohs(chans));
+		return -1;
+	}
+	if (read(fd, &freq, 4) != 4) {
+		ast_log(LOG_WARNING, "Read failed (freq)\n");
+		return -1;
+	}
+	if (ltohl(freq) != 8000) {
+		ast_log(LOG_WARNING, "Unexpected freqency %d\n", ltohl(freq));
+		return -1;
+	}
+	/* Ignore the byte frequency */
+	if (read(fd, &freq, 4) != 4) {
+		ast_log(LOG_WARNING, "Read failed (X_1)\n");
+		return -1;
+	}
+	/* Ignore the two weird fields */
+	if (read(fd, &freq, 4) != 4) {
+		ast_log(LOG_WARNING, "Read failed (X_2/X_3)\n");
+		return -1;
+	}
+	/* Ignore the byte frequency */
+	if (read(fd, &freq, 4) != 4) {
+		ast_log(LOG_WARNING, "Read failed (Y_1)\n");
+		return -1;
+	}
+	/* Check for the word fact */
+	if (read(fd, &fact, 4) != 4) {
+		ast_log(LOG_WARNING, "Read failed (fact)\n");
+		return -1;
+	}
+	if (memcmp(&fact, "fact", 4)) {
+		ast_log(LOG_WARNING, "Does not say fact\n");
+		return -1;
+	}
+	/* Ignore the "fact value" */
+	if (read(fd, &fact, 4) != 4) {
+		ast_log(LOG_WARNING, "Read failed (fact header)\n");
+		return -1;
+	}
+	if (read(fd, &fact, 4) != 4) {
+		ast_log(LOG_WARNING, "Read failed (fact value)\n");
+		return -1;
+	}
+	/* Check for the word data */
+	if (read(fd, &data, 4) != 4) {
+		ast_log(LOG_WARNING, "Read failed (data)\n");
+		return -1;
+	}
+	if (memcmp(&data, "data", 4)) {
+		ast_log(LOG_WARNING, "Does not say data\n");
+		return -1;
+	}
+	/* Ignore the data length */
+	if (read(fd, &data, 4) != 4) {
+		ast_log(LOG_WARNING, "Read failed (data)\n");
+		return -1;
+	}
+	return 0;
+}
+
+static int update_header(int fd, int bytes)
+{
+	int cur;
+	int datalen = htoll(bytes);
+	int filelen = htoll(52 + ((bytes + 1) & ~0x1));
+	cur = lseek(fd, 0, SEEK_CUR);
+	if (cur < 0) {
+		ast_log(LOG_WARNING, "Unable to find our position\n");
+		return -1;
+	}
+	if (lseek(fd, 4, SEEK_SET) != 4) {
+		ast_log(LOG_WARNING, "Unable to set our position\n");
+		return -1;
+	}
+	if (write(fd, &filelen, 4) != 4) {
+		ast_log(LOG_WARNING, "Unable to set write file size\n");
+		return -1;
+	}
+	if (lseek(fd, 56, SEEK_SET) != 56) {
+		ast_log(LOG_WARNING, "Unable to set our position\n");
+		return -1;
+	}
+	if (write(fd, &datalen, 4) != 4) {
+		ast_log(LOG_WARNING, "Unable to set write datalen\n");
+		return -1;
+	}
+	if (lseek(fd, cur, SEEK_SET) != cur) {
+		ast_log(LOG_WARNING, "Unable to return to position\n");
+		return -1;
+	}
+	return 0;
+}
+
+static int write_header(int fd)
+{
+	unsigned int hz=htoll(8000);
+	unsigned int bhz = htoll(1625);
+	unsigned int hs = htoll(20);
+	unsigned short fmt = htols(49);
+	unsigned short chans = htols(1);
+	unsigned int fhs = htoll(4);
+	unsigned int x_1 = htoll(65);
+	unsigned short x_2 = htols(2);
+	unsigned short x_3 = htols(320);
+	unsigned int y_1 = htoll(20160);
+	unsigned int size = htoll(0);
+	/* Write a GSM header, ignoring sizes which will be filled in later */
+	if (write(fd, "RIFF", 4) != 4) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	if (write(fd, &size, 4) != 4) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	if (write(fd, "WAVEfmt ", 8) != 8) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	if (write(fd, &hs, 4) != 4) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	if (write(fd, &fmt, 2) != 2) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	if (write(fd, &chans, 2) != 2) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	if (write(fd, &hz, 4) != 4) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	if (write(fd, &bhz, 4) != 4) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	if (write(fd, &x_1, 4) != 4) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	if (write(fd, &x_2, 2) != 2) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	if (write(fd, &x_3, 2) != 2) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	if (write(fd, "fact", 4) != 4) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	if (write(fd, &fhs, 4) != 4) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	if (write(fd, &y_1, 4) != 4) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	if (write(fd, "data", 4) != 4) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	if (write(fd, &size, 4) != 4) {
+		ast_log(LOG_WARNING, "Unable to write header\n");
+		return -1;
+	}
+	return 0;
+}
+
+static struct ast_filestream *wav_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)))) {
+		memset(tmp, 0, sizeof(struct ast_filestream));
+		if (check_header(fd)) {
+			free(tmp);
+			return NULL;
+		}
+		if (pthread_mutex_lock(&wav_lock)) {
+			ast_log(LOG_WARNING, "Unable to lock wav list\n");
+			free(tmp);
+			return NULL;
+		}
+		tmp->next = glist;
+		glist = tmp;
+		tmp->fd = fd;
+		tmp->owner = NULL;
+		tmp->fr.data = tmp->gsm;
+		tmp->fr.frametype = AST_FRAME_VOICE;
+		tmp->fr.subclass = AST_FORMAT_GSM;
+		/* datalen will vary for each frame */
+		tmp->fr.src = name;
+		tmp->fr.mallocd = 0;
+		tmp->secondhalf = 0;
+		tmp->lasttimeout = -1;
+		glistcnt++;
+		pthread_mutex_unlock(&wav_lock);
+		ast_update_use_count();
+	}
+	return tmp;
+}
+
+static struct ast_filestream *wav_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)))) {
+		memset(tmp, 0, sizeof(struct ast_filestream));
+		if (write_header(fd)) {
+			free(tmp);
+			return NULL;
+		}
+		if (pthread_mutex_lock(&wav_lock)) {
+			ast_log(LOG_WARNING, "Unable to lock wav list\n");
+			free(tmp);
+			return NULL;
+		}
+		tmp->next = glist;
+		glist = tmp;
+		tmp->fd = fd;
+		tmp->owner = NULL;
+		tmp->lasttimeout = -1;
+		glistcnt++;
+		pthread_mutex_unlock(&wav_lock);
+		ast_update_use_count();
+	} else
+		ast_log(LOG_WARNING, "Out of memory\n");
+	return tmp;
+}
+
+static struct ast_frame *wav_read(struct ast_filestream *s)
+{
+	return NULL;
+}
+
+static void wav_close(struct ast_filestream *s)
+{
+	struct ast_filestream *tmp, *tmpl = NULL;
+	char zero = 0;
+	if (pthread_mutex_lock(&wav_lock)) {
+		ast_log(LOG_WARNING, "Unable to lock wav 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(&wav_lock);
+	ast_update_use_count();
+	if (!tmp) 
+		ast_log(LOG_WARNING, "Freeing a filestream we don't seem to own\n");
+	/* Pad to even length */
+	if (s->bytes & 0x1)
+		write(s->fd, &zero, 1);
+	close(s->fd);
+	free(s);
+}
+
+static int ast_read_callback(void *data)
+{
+	int retval = 0;
+	int res;
+	int delay = 20;
+	struct ast_filestream *s = data;
+	char msdata[66];
+	struct timeval tv;
+	/* Send a frame from the file to the appropriate channel */
+
+	s->fr.frametype = AST_FRAME_VOICE;
+	s->fr.subclass = AST_FORMAT_GSM;
+	s->fr.offset = AST_FRIENDLY_OFFSET;
+	s->fr.timelen = 20;
+	s->fr.datalen = 33;
+	s->fr.mallocd = 0;
+	if (s->secondhalf) {
+		/* Just return a frame based on the second GSM frame */
+		s->fr.data = s->gsm + 33;
+	} else {
+		if ((res = read(s->fd, msdata, 65)) != 65) {
+			if (res && (res != 1))
+				ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
+			s->owner->streamid = -1;
+			return 0;
+		}
+		/* Convert from MS format to two real GSM frames */
+		conv65(msdata, s->gsm);
+		s->fr.data = s->gsm;
+	}
+	s->secondhalf = !s->secondhalf;
+	/* 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;
+	}
+	if (s->last.tv_usec || s->last.tv_usec) {
+		int ms;
+		gettimeofday(&tv, NULL);
+		ms = 1000 * (tv.tv_sec - s->last.tv_sec) + 
+			(tv.tv_usec - s->last.tv_usec) / 1000;
+		s->last.tv_sec = tv.tv_sec;
+		s->last.tv_usec = tv.tv_usec;
+		if ((ms - delay) * (ms - delay) > 4) {
+			/* Compensate if we're more than 2 ms off */
+			s->adj -= (ms - delay);
+		}
+#if 0
+		fprintf(stdout, "Delay is %d, adjustment is %d, last was %d\n", delay, s->adj, ms);
+#endif
+		delay += s->adj;
+		if (delay < 1)
+			delay = 1;
+	} else
+		gettimeofday(&s->last, NULL);
+	if (s->lasttimeout != delay) {
+		/* We'll install the next timeout now. */
+		s->owner->streamid = ast_sched_add(s->owner->sched,
+				delay, ast_read_callback, s); 
+		s->lasttimeout = delay;
+	} else {
+		/* Just come back again at the same time */
+		retval = -1;
+	}
+	return retval;
+}
+
+static int wav_apply(struct ast_channel *c, struct ast_filestream *s)
+{
+	/* Select our owner for this stream, and get the ball rolling. */
+	s->owner = c;
+	ast_read_callback(s);
+	return 0;
+}
+
+static int wav_write(struct ast_filestream *fs, struct ast_frame *f)
+{
+	int res;
+	char msdata[66];
+	if (f->frametype != AST_FRAME_VOICE) {
+		ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
+		return -1;
+	}
+	if (f->subclass != AST_FORMAT_GSM) {
+		ast_log(LOG_WARNING, "Asked to write non-GSM frame (%d)!\n", f->subclass);
+		return -1;
+	}
+	if (fs->secondhalf) {
+		memcpy(fs->gsm + 33, f->data, 33);
+		conv66(fs->gsm, msdata);
+		if ((res = write(fs->fd, msdata, 65)) != 65) {
+			ast_log(LOG_WARNING, "Bad write (%d/65): %s\n", res, strerror(errno));
+			return -1;
+		}
+		fs->bytes += 65;
+		update_header(fs->fd, fs->bytes);
+	} else {
+		/* Copy the data and do nothing */
+		memcpy(fs->gsm, f->data, 33);
+	}
+	fs->secondhalf = !fs->secondhalf;
+	return 0;
+}
+
+static char *wav_getcomment(struct ast_filestream *s)
+{
+	return NULL;
+}
+
+int load_module()
+{
+	return ast_format_register(name, exts, AST_FORMAT_GSM,
+								wav_open,
+								wav_rewrite,
+								wav_apply,
+								wav_write,
+								wav_read,
+								wav_close,
+								wav_getcomment);
+								
+								
+}
+
+int unload_module()
+{
+	struct ast_filestream *tmp, *tmpl;
+	if (pthread_mutex_lock(&wav_lock)) {
+		ast_log(LOG_WARNING, "Unable to lock wav 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(&wav_lock);
+	return ast_format_unregister(name);
+}	
+
+int usecount()
+{
+	int res;
+	if (pthread_mutex_lock(&wav_lock)) {
+		ast_log(LOG_WARNING, "Unable to lock wav list\n");
+		return -1;
+	}
+	res = glistcnt;
+	pthread_mutex_unlock(&wav_lock);
+	return res;
+}
+
+char *description()
+{
+	return desc;
+}
+