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-rw-r--r--1.2/formats/format_wav_gsm.c589
1 files changed, 589 insertions, 0 deletions
diff --git a/1.2/formats/format_wav_gsm.c b/1.2/formats/format_wav_gsm.c
new file mode 100644
index 000000000..c7bc50425
--- /dev/null
+++ b/1.2/formats/format_wav_gsm.c
@@ -0,0 +1,589 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 1999 - 2005, Digium, Inc.
+ *
+ * Mark Spencer <markster@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief Save GSM in the proprietary Microsoft format.
+ *
+ * Microsoft WAV format (Proprietary GSM)
+ * \arg File name extension: WAV,wav49 (Upper case WAV, lower case is another format)
+ * This format can be played on Windows systems, used for
+ * e-mail attachments mainly.
+ * \ingroup formats
+ */
+
+#include <unistd.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdlib.h>
+#include <sys/time.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include "asterisk/lock.h"
+#include "asterisk/channel.h"
+#include "asterisk/file.h"
+#include "asterisk/logger.h"
+#include "asterisk/sched.h"
+#include "asterisk/module.h"
+#include "asterisk/endian.h"
+
+#include "msgsm.h"
+
+/* Some Ideas for this code came from makewave.c by Jeffrey Chilton */
+
+/* Portions of the conversion code are by guido@sienanet.it */
+
+/* begin binary data: */
+char msgsm_silence[] = /* 65 */
+{0x48,0x17,0xD6,0x84,0x02,0x80,0x24,0x49,0x92,0x24,0x89,0x02,0x80,0x24,0x49
+,0x92,0x24,0x89,0x02,0x80,0x24,0x49,0x92,0x24,0x89,0x02,0x80,0x24,0x49,0x92
+,0x24,0x09,0x82,0x74,0x61,0x4D,0x28,0x00,0x48,0x92,0x24,0x49,0x92,0x28,0x00
+,0x48,0x92,0x24,0x49,0x92,0x28,0x00,0x48,0x92,0x24,0x49,0x92,0x28,0x00,0x48
+,0x92,0x24,0x49,0x92,0x00};
+/* end binary data. size = 65 bytes */
+
+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 */
+ FILE *f; /* Descriptor */
+ 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 */
+ struct timeval last;
+};
+
+
+AST_MUTEX_DEFINE_STATIC(wav_lock);
+static int glistcnt = 0;
+
+static char *name = "wav49";
+static char *desc = "Microsoft WAV format (Proprietary GSM)";
+static char *exts = "WAV|wav49";
+
+#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(FILE *f)
+{
+ int type, size, formtype;
+ int fmt, hsize, fact;
+ short format, chans;
+ int freq;
+ int data;
+ if (fread(&type, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Read failed (type)\n");
+ return -1;
+ }
+ if (fread(&size, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Read failed (size)\n");
+ return -1;
+ }
+ size = ltohl(size);
+ if (fread(&formtype, 1, 4, f) != 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 (fread(&fmt, 1, 4, f) != 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 (fread(&hsize, 1, 4, f) != 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 (fread(&format, 1, 2, f) != 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 (fread(&chans, 1, 2, f) != 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 (fread(&freq, 1, 4, f) != 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 (fread(&freq, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Read failed (X_1)\n");
+ return -1;
+ }
+ /* Ignore the two weird fields */
+ if (fread(&freq, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Read failed (X_2/X_3)\n");
+ return -1;
+ }
+ /* Ignore the byte frequency */
+ if (fread(&freq, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Read failed (Y_1)\n");
+ return -1;
+ }
+ /* Check for the word fact */
+ if (fread(&fact, 1, 4, f) != 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 (fread(&fact, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Read failed (fact header)\n");
+ return -1;
+ }
+ if (fread(&fact, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Read failed (fact value)\n");
+ return -1;
+ }
+ /* Check for the word data */
+ if (fread(&data, 1, 4, f) != 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 (fread(&data, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Read failed (data)\n");
+ return -1;
+ }
+ return 0;
+}
+
+static int update_header(FILE *f)
+{
+ off_t cur,end,bytes;
+ int datalen,filelen;
+
+ cur = ftell(f);
+ fseek(f, 0, SEEK_END);
+ end = ftell(f);
+ /* in a gsm WAV, data starts 60 bytes in */
+ bytes = end - 60;
+ datalen = htoll((bytes + 1) & ~0x1);
+ filelen = htoll(52 + ((bytes + 1) & ~0x1));
+ if (cur < 0) {
+ ast_log(LOG_WARNING, "Unable to find our position\n");
+ return -1;
+ }
+ if (fseek(f, 4, SEEK_SET)) {
+ ast_log(LOG_WARNING, "Unable to set our position\n");
+ return -1;
+ }
+ if (fwrite(&filelen, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Unable to set write file size\n");
+ return -1;
+ }
+ if (fseek(f, 56, SEEK_SET)) {
+ ast_log(LOG_WARNING, "Unable to set our position\n");
+ return -1;
+ }
+ if (fwrite(&datalen, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Unable to set write datalen\n");
+ return -1;
+ }
+ if (fseek(f, cur, SEEK_SET)) {
+ ast_log(LOG_WARNING, "Unable to return to position\n");
+ return -1;
+ }
+ return 0;
+}
+
+static int write_header(FILE *f)
+{
+ 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 (fwrite("RIFF", 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ if (fwrite(&size, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ if (fwrite("WAVEfmt ", 1, 8, f) != 8) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ if (fwrite(&hs, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ if (fwrite(&fmt, 1, 2, f) != 2) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ if (fwrite(&chans, 1, 2, f) != 2) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ if (fwrite(&hz, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ if (fwrite(&bhz, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ if (fwrite(&x_1, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ if (fwrite(&x_2, 1, 2, f) != 2) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ if (fwrite(&x_3, 1, 2, f) != 2) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ if (fwrite("fact", 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ if (fwrite(&fhs, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ if (fwrite(&y_1, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ if (fwrite("data", 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ if (fwrite(&size, 1, 4, f) != 4) {
+ ast_log(LOG_WARNING, "Unable to write header\n");
+ return -1;
+ }
+ return 0;
+}
+
+static struct ast_filestream *wav_open(FILE *f)
+{
+ /* 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(f)) {
+ free(tmp);
+ return NULL;
+ }
+ if (ast_mutex_lock(&wav_lock)) {
+ ast_log(LOG_WARNING, "Unable to lock wav list\n");
+ free(tmp);
+ return NULL;
+ }
+ tmp->f = f;
+ 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;
+ glistcnt++;
+ ast_mutex_unlock(&wav_lock);
+ ast_update_use_count();
+ }
+ return tmp;
+}
+
+static struct ast_filestream *wav_rewrite(FILE *f, const 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(f)) {
+ free(tmp);
+ return NULL;
+ }
+ if (ast_mutex_lock(&wav_lock)) {
+ ast_log(LOG_WARNING, "Unable to lock wav list\n");
+ free(tmp);
+ return NULL;
+ }
+ tmp->f = f;
+ glistcnt++;
+ ast_mutex_unlock(&wav_lock);
+ ast_update_use_count();
+ } else
+ ast_log(LOG_WARNING, "Out of memory\n");
+ return tmp;
+}
+
+static void wav_close(struct ast_filestream *s)
+{
+ char zero = 0;
+ if (ast_mutex_lock(&wav_lock)) {
+ ast_log(LOG_WARNING, "Unable to lock wav list\n");
+ return;
+ }
+ glistcnt--;
+ ast_mutex_unlock(&wav_lock);
+ ast_update_use_count();
+ /* Pad to even length */
+ fseek(s->f, 0, SEEK_END);
+ if (ftell(s->f) & 0x1)
+ fwrite(&zero, 1, 1, s->f);
+ fclose(s->f);
+ free(s);
+ s = NULL;
+}
+
+static struct ast_frame *wav_read(struct ast_filestream *s, int *whennext)
+{
+ int res;
+ char msdata[66];
+ /* 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.samples = 160;
+ 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 = fread(msdata, 1, 65, s->f)) != 65) {
+ if (res && (res != 1))
+ ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
+ return NULL;
+ }
+ /* Convert from MS format to two real GSM frames */
+ conv65(msdata, s->gsm);
+ s->fr.data = s->gsm;
+ }
+ s->secondhalf = !s->secondhalf;
+ *whennext = 160;
+ return &s->fr;
+}
+
+static int wav_write(struct ast_filestream *fs, struct ast_frame *f)
+{
+ int res;
+ char msdata[66];
+ int len =0;
+ int alreadyms=0;
+ 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 (!(f->datalen % 65))
+ alreadyms = 1;
+ while(len < f->datalen) {
+ if (alreadyms) {
+ fs->secondhalf = 0;
+ if ((res = fwrite(f->data + len, 1, 65, fs->f)) != 65) {
+ ast_log(LOG_WARNING, "Bad write (%d/65): %s\n", res, strerror(errno));
+ return -1;
+ }
+ update_header(fs->f);
+ len += 65;
+ } else {
+ if (fs->secondhalf) {
+ memcpy(fs->gsm + 33, f->data + len, 33);
+ conv66(fs->gsm, msdata);
+ if ((res = fwrite(msdata, 1, 65, fs->f)) != 65) {
+ ast_log(LOG_WARNING, "Bad write (%d/65): %s\n", res, strerror(errno));
+ return -1;
+ }
+ update_header(fs->f);
+ } else {
+ /* Copy the data and do nothing */
+ memcpy(fs->gsm, f->data + len, 33);
+ }
+ fs->secondhalf = !fs->secondhalf;
+ len += 33;
+ }
+ }
+ return 0;
+}
+
+static int wav_seek(struct ast_filestream *fs, long sample_offset, int whence)
+{
+ off_t offset=0,distance,cur,min,max;
+ min = 60;
+ cur = ftell(fs->f);
+ fseek(fs->f, 0, SEEK_END);
+ max = ftell(fs->f);
+ /* I'm getting sloppy here, I'm only going to go to even splits of the 2
+ * frames, if you want tighter cuts use format_gsm, format_pcm, or format_wav */
+ distance = (sample_offset/320) * 65;
+ if(whence == SEEK_SET)
+ offset = distance + min;
+ else if(whence == SEEK_CUR || whence == SEEK_FORCECUR)
+ offset = distance + cur;
+ else if(whence == SEEK_END)
+ offset = max - distance;
+ /* always protect against seeking past end of header */
+ offset = (offset < min)?min:offset;
+ if (whence != SEEK_FORCECUR) {
+ offset = (offset > max)?max:offset;
+ } else if (offset > max) {
+ int i;
+ fseek(fs->f, 0, SEEK_END);
+ for (i=0; i< (offset - max) / 65; i++) {
+ fwrite(msgsm_silence, 1, 65, fs->f);
+ }
+ }
+ fs->secondhalf = 0;
+ return fseek(fs->f, offset, SEEK_SET);
+}
+
+static int wav_trunc(struct ast_filestream *fs)
+{
+ if (ftruncate(fileno(fs->f), ftell(fs->f)))
+ return -1;
+ return update_header(fs->f);
+}
+
+static long wav_tell(struct ast_filestream *fs)
+{
+ off_t offset;
+ offset = ftell(fs->f);
+ /* since this will most likely be used later in play or record, lets stick
+ * to that level of resolution, just even frames boundaries */
+ return (offset - 52)/65*320;
+}
+
+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_write,
+ wav_seek,
+ wav_trunc,
+ wav_tell,
+ wav_read,
+ wav_close,
+ wav_getcomment);
+
+
+}
+
+int unload_module()
+{
+ return ast_format_unregister(name);
+}
+
+int usecount()
+{
+ return glistcnt;
+}
+
+char *description()
+{
+ return desc;
+}
+
+
+char *key()
+{
+ return ASTERISK_GPL_KEY;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-27 23:22:01 +0000