From a640df56e68c9228156a89271778a427bbe84397 Mon Sep 17 00:00:00 2001 From: Mark Spencer Date: Thu, 22 Apr 2004 03:34:13 +0000 Subject: Fix iLBC with valgrind, add iLBC format from bkw_ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2740 65c4cc65-6c06-0410-ace0-fbb531ad65f3 --- formats/format_ilbc.c | 253 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 253 insertions(+) create mode 100755 formats/format_ilbc.c (limited to 'formats/format_ilbc.c') diff --git a/formats/format_ilbc.c b/formats/format_ilbc.c new file mode 100755 index 000000000..41ec40adc --- /dev/null +++ b/formats/format_ilbc.c @@ -0,0 +1,253 @@ +/* + * Asterisk -- A telephony toolkit for Linux. + * + * Save to raw, headerless iLBC data. + * + * Brian K. West + * + * Copyright (C) 1999, Mark Spencer + * + * Mark Spencer + * + * This program is free software, distributed under the terms of + * the GNU General Public License + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#ifdef __linux__ +#include +#else +#include +#endif + +/* Some Ideas for this code came from makeg729e.c by Jeffrey 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 */ + struct ast_frame fr; /* Frame information */ + char waste[AST_FRIENDLY_OFFSET]; /* Buffer for sending frames, etc */ + char empty; /* Empty character */ + unsigned char ilbc[50]; /* Two Real Speex Frames */ +}; + + +static ast_mutex_t ilbc_lock = AST_MUTEX_INITIALIZER; +static int glistcnt = 0; + +static char *name = "iLBC"; +static char *desc = "Raw iLBC data"; +static char *exts = "ilbc"; + +static struct ast_filestream *ilbc_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 (ast_mutex_lock(&ilbc_lock)) { + ast_log(LOG_WARNING, "Unable to lock ilbc list\n"); + free(tmp); + return NULL; + } + tmp->fd = fd; + tmp->fr.data = tmp->ilbc; + tmp->fr.frametype = AST_FRAME_VOICE; + tmp->fr.subclass = AST_FORMAT_ILBC; + /* datalen will vary for each frame */ + tmp->fr.src = name; + tmp->fr.mallocd = 0; + glistcnt++; + ast_mutex_unlock(&ilbc_lock); + ast_update_use_count(); + } + return tmp; +} + +static struct ast_filestream *ilbc_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 (ast_mutex_lock(&ilbc_lock)) { + ast_log(LOG_WARNING, "Unable to lock ilbc list\n"); + free(tmp); + return NULL; + } + tmp->fd = fd; + glistcnt++; + ast_mutex_unlock(&ilbc_lock); + ast_update_use_count(); + } else + ast_log(LOG_WARNING, "Out of memory\n"); + return tmp; +} + +static void ilbc_close(struct ast_filestream *s) +{ + if (ast_mutex_lock(&ilbc_lock)) { + ast_log(LOG_WARNING, "Unable to lock ilbc list\n"); + return; + } + glistcnt--; + ast_mutex_unlock(&ilbc_lock); + ast_update_use_count(); + close(s->fd); + free(s); + s = NULL; +} + +static struct ast_frame *ilbc_read(struct ast_filestream *s, int *whennext) +{ + int res; + /* Send a frame from the file to the appropriate channel */ + s->fr.frametype = AST_FRAME_VOICE; + s->fr.subclass = AST_FORMAT_ILBC; + s->fr.offset = AST_FRIENDLY_OFFSET; + s->fr.samples = 240; + s->fr.datalen = 50; + s->fr.mallocd = 0; + s->fr.data = s->ilbc; + if ((res = read(s->fd, s->ilbc, 50)) != 50) { + if (res) + ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno)); + return NULL; + } + *whennext = s->fr.samples; + return &s->fr; +} + +static int ilbc_write(struct ast_filestream *fs, struct ast_frame *f) +{ + int res; + if (f->frametype != AST_FRAME_VOICE) { + ast_log(LOG_WARNING, "Asked to write non-voice frame!\n"); + return -1; + } + if (f->subclass != AST_FORMAT_ILBC) { + ast_log(LOG_WARNING, "Asked to write non-iLBC frame (%d)!\n", f->subclass); + return -1; + } + if (f->datalen % 50) { + ast_log(LOG_WARNING, "Invalid data length, %d, should be multiple of 50\n", f->datalen); + return -1; + } + if ((res = write(fs->fd, f->data, f->datalen)) != f->datalen) { + ast_log(LOG_WARNING, "Bad write (%d/23): %s\n", res, strerror(errno)); + return -1; + } + return 0; +} + +static char *ilbc_getcomment(struct ast_filestream *s) +{ + return NULL; +} + +static int ilbc_seek(struct ast_filestream *fs, long sample_offset, int whence) +{ + long bytes; + off_t min,cur,max,offset=0; + min = 0; + cur = lseek(fs->fd, 0, SEEK_CUR); + max = lseek(fs->fd, 0, SEEK_END); + + bytes = 36 * (sample_offset / 240); + if (whence == SEEK_SET) + offset = bytes; + else if (whence == SEEK_CUR || whence == SEEK_FORCECUR) + offset = cur + bytes; + else if (whence == SEEK_END) + offset = max - bytes; + if (whence != SEEK_FORCECUR) { + offset = (offset > max)?max:offset; + } + // protect against seeking beyond begining. + offset = (offset < min)?min:offset; + if (lseek(fs->fd, offset, SEEK_SET) < 0) + return -1; + return 0; +} + +static int ilbc_trunc(struct ast_filestream *fs) +{ + /* Truncate file to current length */ + if (ftruncate(fs->fd, lseek(fs->fd, 0, SEEK_CUR)) < 0) + return -1; + return 0; +} + +static long ilbc_tell(struct ast_filestream *fs) +{ + off_t offset; + offset = lseek(fs->fd, 0, SEEK_CUR); + return (offset/50)*240; +} + +int load_module() +{ + return ast_format_register(name, exts, AST_FORMAT_ILBC, + ilbc_open, + ilbc_rewrite, + ilbc_write, + ilbc_seek, + ilbc_trunc, + ilbc_tell, + ilbc_read, + ilbc_close, + ilbc_getcomment); + + +} + +int unload_module() +{ + return ast_format_unregister(name); +} + +int usecount() +{ + int res; + if (ast_mutex_lock(&ilbc_lock)) { + ast_log(LOG_WARNING, "Unable to lock ilbc list\n"); + return -1; + } + res = glistcnt; + ast_mutex_unlock(&ilbc_lock); + return res; +} + +char *description() +{ + return desc; +} + + +char *key() +{ + return ASTERISK_GPL_KEY; +} -- cgit v1.2.3