diff options
author | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 1999-12-16 13:44:30 +0000 |
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committer | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 1999-12-16 13:44:30 +0000 |
commit | 509765aef52f3ce306a114832ab885ad85522d2e (patch) | |
tree | 900d9952178c438c1347376241e306e457817f58 /formats/format_wav_gsm.c | |
parent | 70f08a7afb001c7c1608181fa4546c6460890e04 (diff) |
Version 0.1.1 from FTP
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@139 f38db490-d61c-443f-a65b-d21fe96a405b
Diffstat (limited to 'formats/format_wav_gsm.c')
-rwxr-xr-x | formats/format_wav_gsm.c | 586 |
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; +} + |