diff options
author | kpfleming <kpfleming@f38db490-d61c-443f-a65b-d21fe96a405b> | 2006-03-03 18:13:26 +0000 |
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committer | kpfleming <kpfleming@f38db490-d61c-443f-a65b-d21fe96a405b> | 2006-03-03 18:13:26 +0000 |
commit | 67da2f8263b4e9bb5522fa59b27e143381d69774 (patch) | |
tree | e69baf2b1594606e9ea2e80d26d691a10bd23831 /1.2-netsec/formats/format_wav_gsm.c | |
parent | 187ac8fdb51443812933047136b96b5a532dd857 (diff) |
Creating tag for the release of asterisk-1.2.5
git-svn-id: http://svn.digium.com/svn/asterisk/tags/1.2.5@11747 f38db490-d61c-443f-a65b-d21fe96a405b
Diffstat (limited to '1.2-netsec/formats/format_wav_gsm.c')
-rw-r--r-- | 1.2-netsec/formats/format_wav_gsm.c | 589 |
1 files changed, 589 insertions, 0 deletions
diff --git a/1.2-netsec/formats/format_wav_gsm.c b/1.2-netsec/formats/format_wav_gsm.c new file mode 100644 index 000000000..c7bc50425 --- /dev/null +++ b/1.2-netsec/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; +} |