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asterisk/main/file.c

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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2006, 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 Generic File Format Support.
*
* \author Mark Spencer <markster@digium.com>
*/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include <dirent.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <math.h>
#include "asterisk/_private.h" /* declare ast_file_init() */
#include "asterisk/paths.h" /* use ast_config_AST_DATA_DIR */
#include "asterisk/mod_format.h"
#include "asterisk/cli.h"
#include "asterisk/channel.h"
#include "asterisk/sched.h"
#include "asterisk/translate.h"
#include "asterisk/utils.h"
#include "asterisk/lock.h"
#include "asterisk/app.h"
#include "asterisk/pbx.h"
#include "asterisk/linkedlists.h"
#include "asterisk/module.h"
#include "asterisk/astobj2.h"
#include "asterisk/test.h"
/*! \brief
* The following variable controls the layout of localized sound files.
* If 0, use the historical layout with prefix just before the filename
* (i.e. digits/en/1.gsm , digits/it/1.gsm or default to digits/1.gsm),
* if 1 put the prefix at the beginning of the filename
* (i.e. en/digits/1.gsm, it/digits/1.gsm or default to digits/1.gsm).
* The latter permits a language to be entirely in one directory.
*
* This is settable in asterisk.conf.
*/
int ast_language_is_prefix = 1;
static AST_RWLIST_HEAD_STATIC(formats, ast_format_def);
int __ast_format_def_register(const struct ast_format_def *f, struct ast_module *mod)
{
struct ast_format_def *tmp;
AST_RWLIST_WRLOCK(&formats);
AST_RWLIST_TRAVERSE(&formats, tmp, list) {
if (!strcasecmp(f->name, tmp->name)) {
AST_RWLIST_UNLOCK(&formats);
ast_log(LOG_WARNING, "Tried to register '%s' format, already registered\n", f->name);
return -1;
}
}
if (!(tmp = ast_calloc(1, sizeof(*tmp)))) {
AST_RWLIST_UNLOCK(&formats);
return -1;
}
*tmp = *f;
tmp->module = mod;
if (tmp->buf_size) {
/*
* Align buf_size properly, rounding up to the machine-specific
* alignment for pointers.
*/
struct _test_align { void *a, *b; } p;
int align = (char *)&p.b - (char *)&p.a;
tmp->buf_size = ((f->buf_size + align - 1) / align) * align;
}
memset(&tmp->list, 0, sizeof(tmp->list));
AST_RWLIST_INSERT_HEAD(&formats, tmp, list);
AST_RWLIST_UNLOCK(&formats);
ast_verb(2, "Registered file format %s, extension(s) %s\n", f->name, f->exts);
return 0;
}
int ast_format_def_unregister(const char *name)
{
struct ast_format_def *tmp;
int res = -1;
AST_RWLIST_WRLOCK(&formats);
AST_RWLIST_TRAVERSE_SAFE_BEGIN(&formats, tmp, list) {
if (!strcasecmp(name, tmp->name)) {
AST_RWLIST_REMOVE_CURRENT(list);
ast_free(tmp);
res = 0;
}
}
AST_RWLIST_TRAVERSE_SAFE_END;
AST_RWLIST_UNLOCK(&formats);
if (!res)
ast_verb(2, "Unregistered format %s\n", name);
else
ast_log(LOG_WARNING, "Tried to unregister format %s, already unregistered\n", name);
return res;
}
int ast_stopstream(struct ast_channel *tmp)
{
ast_channel_lock(tmp);
/* Stop a running stream if there is one */
if (tmp->stream) {
ast_closestream(tmp->stream);
tmp->stream = NULL;
if (tmp->oldwriteformat.id && ast_set_write_format(tmp, &tmp->oldwriteformat))
ast_log(LOG_WARNING, "Unable to restore format back to %s\n", ast_getformatname(&tmp->oldwriteformat));
}
/* Stop the video stream too */
if (tmp->vstream != NULL) {
ast_closestream(tmp->vstream);
tmp->vstream = NULL;
}
ast_channel_unlock(tmp);
return 0;
}
int ast_writestream(struct ast_filestream *fs, struct ast_frame *f)
{
int res = -1;
if (f->frametype == AST_FRAME_VIDEO) {
if (AST_FORMAT_GET_TYPE(fs->fmt->format.id) == AST_FORMAT_TYPE_AUDIO) {
/* This is the audio portion. Call the video one... */
if (!fs->vfs && fs->filename) {
const char *type = ast_getformatname(&f->subclass.format);
fs->vfs = ast_writefile(fs->filename, type, NULL, fs->flags, 0, fs->mode);
ast_debug(1, "Opened video output file\n");
}
if (fs->vfs)
return ast_writestream(fs->vfs, f);
/* else ignore */
return 0;
}
} else if (f->frametype != AST_FRAME_VOICE) {
ast_log(LOG_WARNING, "Tried to write non-voice frame\n");
return -1;
}
if (ast_format_cmp(&f->subclass.format, &fs->fmt->format) != AST_FORMAT_CMP_NOT_EQUAL) {
res = fs->fmt->write(fs, f);
if (res < 0)
ast_log(LOG_WARNING, "Natural write failed\n");
else if (res > 0)
ast_log(LOG_WARNING, "Huh??\n");
} else {
/* XXX If they try to send us a type of frame that isn't the normal frame, and isn't
the one we've setup a translator for, we do the "wrong thing" XXX */
if (fs->trans && (ast_format_cmp(&f->subclass.format, &fs->lastwriteformat) != AST_FORMAT_CMP_EQUAL)) {
ast_translator_free_path(fs->trans);
fs->trans = NULL;
}
if (!fs->trans)
fs->trans = ast_translator_build_path(&fs->fmt->format, &f->subclass.format);
if (!fs->trans)
ast_log(LOG_WARNING, "Unable to translate to format %s, source format %s\n",
fs->fmt->name, ast_getformatname(&f->subclass.format));
else {
struct ast_frame *trf;
ast_format_copy(&fs->lastwriteformat, &f->subclass.format);
/* Get the translated frame but don't consume the original in case they're using it on another stream */
if ((trf = ast_translate(fs->trans, f, 0))) {
struct ast_frame *cur;
/* the translator may have returned multiple frames, so process them */
for (cur = trf; cur; cur = AST_LIST_NEXT(cur, frame_list)) {
if ((res = fs->fmt->write(fs, trf))) {
ast_log(LOG_WARNING, "Translated frame write failed\n");
break;
}
}
ast_frfree(trf);
} else {
res = 0;
}
}
}
return res;
}
static int copy(const char *infile, const char *outfile)
{
int ifd, ofd, len;
char buf[4096]; /* XXX make it lerger. */
if ((ifd = open(infile, O_RDONLY)) < 0) {
ast_log(LOG_WARNING, "Unable to open %s in read-only mode\n", infile);
return -1;
}
if ((ofd = open(outfile, O_WRONLY | O_TRUNC | O_CREAT, AST_FILE_MODE)) < 0) {
ast_log(LOG_WARNING, "Unable to open %s in write-only mode\n", outfile);
close(ifd);
return -1;
}
while ( (len = read(ifd, buf, sizeof(buf)) ) ) {
int res;
if (len < 0) {
ast_log(LOG_WARNING, "Read failed on %s: %s\n", infile, strerror(errno));
break;
}
/* XXX handle partial writes */
res = write(ofd, buf, len);
if (res != len) {
ast_log(LOG_WARNING, "Write failed on %s (%d of %d): %s\n", outfile, res, len, strerror(errno));
len = -1; /* error marker */
break;
}
}
close(ifd);
close(ofd);
if (len < 0) {
unlink(outfile);
return -1; /* error */
}
return 0; /* success */
}
/*!
* \brief construct a filename. Absolute pathnames are preserved,
* relative names are prefixed by the sounds/ directory.
* The wav49 suffix is replaced by 'WAV'.
* Returns a malloc'ed string to be freed by the caller.
*/
static char *build_filename(const char *filename, const char *ext)
{
char *fn = NULL;
if (!strcmp(ext, "wav49"))
ext = "WAV";
if (filename[0] == '/') {
if (asprintf(&fn, "%s.%s", filename, ext) < 0) {
ast_log(LOG_WARNING, "asprintf() failed: %s\n", strerror(errno));
fn = NULL;
}
} else {
if (asprintf(&fn, "%s/sounds/%s.%s",
ast_config_AST_DATA_DIR, filename, ext) < 0) {
ast_log(LOG_WARNING, "asprintf() failed: %s\n", strerror(errno));
fn = NULL;
}
}
return fn;
}
/* compare type against the list 'exts' */
/* XXX need a better algorithm */
static int exts_compare(const char *exts, const char *type)
{
char tmp[256];
char *stringp = tmp, *ext;
ast_copy_string(tmp, exts, sizeof(tmp));
while ((ext = strsep(&stringp, "|"))) {
if (!strcmp(ext, type))
return 1;
}
return 0;
}
static void filestream_destructor(void *arg)
{
struct ast_filestream *f = arg;
int status;
int pid = -1;
/* Stop a running stream if there is one */
if (f->owner) {
if (AST_FORMAT_GET_TYPE(f->fmt->format.id) == AST_FORMAT_TYPE_AUDIO) {
f->owner->stream = NULL;
AST_SCHED_DEL(f->owner->sched, f->owner->streamid);
ast_settimeout(f->owner, 0, NULL, NULL);
} else {
f->owner->vstream = NULL;
AST_SCHED_DEL(f->owner->sched, f->owner->vstreamid);
}
}
/* destroy the translator on exit */
if (f->trans)
ast_translator_free_path(f->trans);
if (f->realfilename && f->filename) {
pid = ast_safe_fork(0);
if (!pid) {
execl("/bin/mv", "mv", "-f", f->filename, f->realfilename, SENTINEL);
_exit(1);
}
else if (pid > 0) {
/* Block the parent until the move is complete.*/
waitpid(pid, &status, 0);
}
}
if (f->filename)
free(f->filename);
if (f->realfilename)
free(f->realfilename);
if (f->fmt->close) {
void (*closefn)(struct ast_filestream *) = f->fmt->close;
closefn(f);
}
if (f->f)
fclose(f->f);
if (f->vfs)
ast_closestream(f->vfs);
if (f->write_buffer) {
ast_free(f->write_buffer);
}
if (f->orig_chan_name)
free((void *) f->orig_chan_name);
ast_module_unref(f->fmt->module);
}
static struct ast_filestream *get_filestream(struct ast_format_def *fmt, FILE *bfile)
{
struct ast_filestream *s;
int l = sizeof(*s) + fmt->buf_size + fmt->desc_size; /* total allocation size */
if ( (s = ao2_alloc(l, filestream_destructor)) == NULL)
return NULL;
s->fmt = fmt;
s->f = bfile;
if (fmt->desc_size)
s->_private = ((char *)(s + 1)) + fmt->buf_size;
if (fmt->buf_size)
s->buf = (char *)(s + 1);
s->fr.src = fmt->name;
return s;
}
/*
* Default implementations of open and rewrite.
* Only use them if you don't have expensive stuff to do.
*/
enum wrap_fn { WRAP_OPEN, WRAP_REWRITE };
static int fn_wrapper(struct ast_filestream *s, const char *comment, enum wrap_fn mode)
{
struct ast_format_def *f = s->fmt;
int ret = -1;
int (*openfn)(struct ast_filestream *s);
if (mode == WRAP_OPEN && (openfn = f->open) && openfn(s))
ast_log(LOG_WARNING, "Unable to open format %s\n", f->name);
else if (mode == WRAP_REWRITE && f->rewrite && f->rewrite(s, comment))
ast_log(LOG_WARNING, "Unable to rewrite format %s\n", f->name);
else {
/* preliminary checks succeed. update usecount */
ast_module_ref(f->module);
ret = 0;
}
return ret;
}
static int rewrite_wrapper(struct ast_filestream *s, const char *comment)
{
return fn_wrapper(s, comment, WRAP_REWRITE);
}
static int open_wrapper(struct ast_filestream *s)
{
return fn_wrapper(s, NULL, WRAP_OPEN);
}
enum file_action {
ACTION_EXISTS = 1, /* return matching format if file exists, 0 otherwise */
ACTION_DELETE, /* delete file, return 0 on success, -1 on error */
ACTION_RENAME, /* rename file. return 0 on success, -1 on error */
ACTION_OPEN,
ACTION_COPY /* copy file. return 0 on success, -1 on error */
};
/*!
* \internal
* \brief perform various actions on a file. Second argument
* \note arg2 depends on the command:
* unused for DELETE
* optional ast_format_cap holding all the formats found for a file, for EXISTS.
* destination file name (const char *) for COPY and RENAME
* struct ast_channel * for OPEN
* if fmt is NULL, OPEN will return the first matching entry,
* whereas other functions will run on all matching entries.
*/
static int filehelper(const char *filename, const void *arg2, const char *fmt, const enum file_action action)
{
struct ast_format_def *f;
int res = (action == ACTION_EXISTS) ? 0 : -1;
AST_RWLIST_RDLOCK(&formats);
/* Check for a specific format */
AST_RWLIST_TRAVERSE(&formats, f, list) {
char *stringp, *ext = NULL;
if (fmt && !exts_compare(f->exts, fmt))
continue;
/* Look for a file matching the supported extensions.
* The file must exist, and for OPEN, must match
* one of the formats supported by the channel.
*/
stringp = ast_strdupa(f->exts); /* this is in the stack so does not need to be freed */
while ( (ext = strsep(&stringp, "|")) ) {
struct stat st;
char *fn = build_filename(filename, ext);
if (fn == NULL)
continue;
if ( stat(fn, &st) ) { /* file not existent */
ast_free(fn);
continue;
}
/* for 'OPEN' we need to be sure that the format matches
* what the channel can process
*/
if (action == ACTION_OPEN) {
struct ast_channel *chan = (struct ast_channel *)arg2;
FILE *bfile;
struct ast_filestream *s;
if ((ast_format_cmp(&chan->writeformat, &f->format) == AST_FORMAT_CMP_NOT_EQUAL) &&
!(((AST_FORMAT_GET_TYPE(f->format.id) == AST_FORMAT_TYPE_AUDIO) && fmt) ||
((AST_FORMAT_GET_TYPE(f->format.id) == AST_FORMAT_TYPE_VIDEO) && fmt))) {
ast_free(fn);
continue; /* not a supported format */
}
if ( (bfile = fopen(fn, "r")) == NULL) {
ast_free(fn);
continue; /* cannot open file */
}
s = get_filestream(f, bfile);
if (!s) {
fclose(bfile);
ast_free(fn); /* cannot allocate descriptor */
continue;
}
if (open_wrapper(s)) {
ast_free(fn);
ast_closestream(s);
continue; /* cannot run open on file */
}
if (st.st_size == 0) {
ast_log(LOG_WARNING, "File %s detected to have zero size.\n", fn);
}
/* ok this is good for OPEN */
res = 1; /* found */
s->lasttimeout = -1;
s->fmt = f;
s->trans = NULL;
s->filename = NULL;
if (AST_FORMAT_GET_TYPE(s->fmt->format.id) == AST_FORMAT_TYPE_AUDIO) {
if (chan->stream)
ast_closestream(chan->stream);
chan->stream = s;
} else {
if (chan->vstream)
ast_closestream(chan->vstream);
chan->vstream = s;
}
ast_free(fn);
break;
}
switch (action) {
case ACTION_OPEN:
break; /* will never get here */
case ACTION_EXISTS: /* return the matching format */
/* if arg2 is present, it is a format capabilities structure.
* Add this format to the set of formats this file can be played in */
if (arg2) {
ast_format_cap_add((struct ast_format_cap *) arg2, &f->format);
}
res = 1; /* file does exist and format it exists in is returned in arg2 */
break;
case ACTION_DELETE:
if ( (res = unlink(fn)) )
ast_log(LOG_WARNING, "unlink(%s) failed: %s\n", fn, strerror(errno));
break;
case ACTION_RENAME:
case ACTION_COPY: {
char *nfn = build_filename((const char *)arg2, ext);
if (!nfn)
ast_log(LOG_WARNING, "Out of memory\n");
else {
res = action == ACTION_COPY ? copy(fn, nfn) : rename(fn, nfn);
if (res)
ast_log(LOG_WARNING, "%s(%s,%s) failed: %s\n",
action == ACTION_COPY ? "copy" : "rename",
fn, nfn, strerror(errno));
ast_free(nfn);
}
}
break;
default:
ast_log(LOG_WARNING, "Unknown helper %d\n", action);
}
ast_free(fn);
}
}
AST_RWLIST_UNLOCK(&formats);
return res;
}
static int is_absolute_path(const char *filename)
{
return filename[0] == '/';
}
/*!
* \brief test if a file exists for a given format.
* \note result_cap is OPTIONAL
* \retval 1, true and result_cap represents format capabilities file exists in.
* \retval 0, false
*/
static int fileexists_test(const char *filename, const char *fmt, const char *lang,
char *buf, int buflen, struct ast_format_cap *result_cap)
{
if (buf == NULL) {
return 0;
}
if (ast_language_is_prefix && !is_absolute_path(filename)) { /* new layout */
if (lang) {
snprintf(buf, buflen, "%s/%s", lang, filename);
} else {
snprintf(buf, buflen, "%s", filename);
}
} else { /* old layout */
strcpy(buf, filename); /* first copy the full string */
if (lang) {
/* insert the language and suffix if needed */
const char *c = strrchr(filename, '/');
int offset = c ? c - filename + 1 : 0; /* points right after the last '/' */
snprintf(buf + offset, buflen - offset, "%s/%s", lang, filename + offset);
}
}
return filehelper(buf, result_cap, fmt, ACTION_EXISTS);
}
/*!
* \brief helper routine to locate a file with a given format
* and language preference.
*
* \note Try preflang, preflang with stripped '_' suffices, or NULL.
*
* \note The last parameter(s) point to a buffer of sufficient size,
* which on success is filled with the matching filename.
*
* \param filename, name of the file.
* \param fmt, format to look for the file in. OPTIONAL
* \param preflang, the perfered language
* \param buf, returns the matching filename
* \param buflen, size of the buf
* \param result_cap, OPTIONAL format capabilities result structure
* returns what formats the file was found in.
*
* \retval 1, true. file exists and result format is set
* \retval 0, false. file does not exist.
*/
static int fileexists_core(const char *filename, const char *fmt, const char *preflang,
char *buf, int buflen, struct ast_format_cap *result_cap)
{
char *lang;
if (buf == NULL) {
return 0;
}
/* We try languages in the following order:
* preflang (may include dialect and style codes)
* lang (preflang without dialect - if any)
* <none>
* default (unless the same as preflang or lang without dialect)
*/
lang = ast_strdupa(preflang);
/* Try preferred language, including removing any style or dialect codes */
while (!ast_strlen_zero(lang)) {
char *end;
if (fileexists_test(filename, fmt, lang, buf, buflen, result_cap)) {
return 1;
}
if ((end = strrchr(lang, '_')) != NULL) {
*end = '\0';
continue;
}
break;
}
/* Try without any language */
if (fileexists_test(filename, fmt, NULL, buf, buflen, result_cap)) {
return 1;
}
/* Finally try the default language unless it was already tried before */
if ((ast_strlen_zero(preflang) || strcmp(preflang, DEFAULT_LANGUAGE)) && (ast_strlen_zero(lang) || strcmp(lang, DEFAULT_LANGUAGE))) {
if ((fileexists_test(filename, fmt, DEFAULT_LANGUAGE, buf, buflen, result_cap)) > 0) {
return 1;
}
}
return 0;
}
struct ast_filestream *ast_openstream(struct ast_channel *chan, const char *filename, const char *preflang)
{
return ast_openstream_full(chan, filename, preflang, 0);
}
struct ast_filestream *ast_openstream_full(struct ast_channel *chan, const char *filename, const char *preflang, int asis)
{
/*
* Use fileexists_core() to find a file in a compatible
* language and format, set up a suitable translator,
* and open the stream.
*/
struct ast_format_cap *file_fmt_cap;
int res;
int buflen;
char *buf;
if (!asis) {
/* do this first, otherwise we detect the wrong writeformat */
ast_stopstream(chan);
if (chan->generator)
ast_deactivate_generator(chan);
}
if (preflang == NULL)
preflang = "";
buflen = strlen(preflang) + strlen(filename) + 4;
buf = alloca(buflen);
if (buf == NULL)
return NULL;
if (!(file_fmt_cap = ast_format_cap_alloc_nolock())) {
return NULL;
}
if (!fileexists_core(filename, NULL, preflang, buf, buflen, file_fmt_cap) ||
!ast_format_cap_has_type(file_fmt_cap, AST_FORMAT_TYPE_AUDIO)) {
ast_log(LOG_WARNING, "File %s does not exist in any format\n", filename);
file_fmt_cap = ast_format_cap_destroy(file_fmt_cap);
return NULL;
}
/* Set the channel to a format we can work with and save off the previous format. */
ast_format_copy(&chan->oldwriteformat, &chan->writeformat);
/* Set the channel to the best format that exists for the file. */
res = ast_set_write_format_from_cap(chan, file_fmt_cap);
/* don't need this anymore now that the channel's write format is set. */
file_fmt_cap = ast_format_cap_destroy(file_fmt_cap);
if (res == -1) { /* No format available that works with this channel */
return NULL;
}
res = filehelper(buf, chan, NULL, ACTION_OPEN);
if (res >= 0)
return chan->stream;
return NULL;
}
struct ast_filestream *ast_openvstream(struct ast_channel *chan, const char *filename, const char *preflang)
{
/* As above, but for video. But here we don't have translators
* so we must enforce a format.
*/
struct ast_format tmp_fmt;
struct ast_format_cap *tmp_cap;
char *buf;
int buflen;
const char *fmt;
int fd;
if (preflang == NULL)
preflang = "";
buflen = strlen(preflang) + strlen(filename) + 4;
buf = alloca(buflen);
if (buf == NULL)
return NULL;
/* is the channel capable of video without translation ?*/
if (!ast_format_cap_has_type(chan->nativeformats, AST_FORMAT_TYPE_VIDEO)) {
return NULL;
}
if (!(tmp_cap = ast_format_cap_alloc_nolock())) {
return NULL;
}
/* Video is supported, so see what video formats exist for this file */
if (!fileexists_core(filename, NULL, preflang, buf, buflen, tmp_cap)) {
tmp_cap = ast_format_cap_destroy(tmp_cap);
return NULL;
}
/* iterate over file formats and pick the first one compatible with the channel's native formats */
ast_format_cap_iter_start(tmp_cap);
while (!ast_format_cap_iter_next(tmp_cap, &tmp_fmt)) {
fmt = ast_getformatname(&tmp_fmt);
if ((AST_FORMAT_GET_TYPE(tmp_fmt.id) != AST_FORMAT_TYPE_VIDEO) ||
!ast_format_cap_iscompatible(chan->nativeformats, &tmp_fmt)) {
continue;
}
fd = filehelper(buf, chan, fmt, ACTION_OPEN);
if (fd >= 0) {
ast_format_cap_iter_end(tmp_cap);
tmp_cap = ast_format_cap_destroy(tmp_cap);
return chan->vstream;
}
ast_log(LOG_WARNING, "File %s has video but couldn't be opened\n", filename);
}
ast_format_cap_iter_end(tmp_cap);
tmp_cap = ast_format_cap_destroy(tmp_cap);
return NULL;
}
static struct ast_frame *read_frame(struct ast_filestream *s, int *whennext)
{
struct ast_frame *fr, *new_fr;
if (!s || !s->fmt) {
return NULL;
}
if (!(fr = s->fmt->read(s, whennext))) {
return NULL;
}
if (!(new_fr = ast_frisolate(fr))) {
ast_frfree(fr);
return NULL;
}
if (new_fr != fr) {
ast_frfree(fr);
fr = new_fr;
}
return fr;
}
struct ast_frame *ast_readframe(struct ast_filestream *s)
{
int whennext = 0;
return read_frame(s, &whennext);
}
enum fsread_res {
FSREAD_FAILURE,
FSREAD_SUCCESS_SCHED,
FSREAD_SUCCESS_NOSCHED,
};
static int ast_fsread_audio(const void *data);
static enum fsread_res ast_readaudio_callback(struct ast_filestream *s)
{
int whennext = 0;
while (!whennext) {
struct ast_frame *fr;
if (s->orig_chan_name && strcasecmp(s->owner->name, s->orig_chan_name)) {
goto return_failure;
}
fr = read_frame(s, &whennext);
if (!fr /* stream complete */ || ast_write(s->owner, fr) /* error writing */) {
if (fr) {
ast_log(LOG_WARNING, "Failed to write frame\n");
ast_frfree(fr);
}
goto return_failure;
}
if (fr) {
ast_frfree(fr);
}
}
if (whennext != s->lasttimeout) {
if (s->owner->timingfd > -1) {
float samp_rate = (float) ast_format_rate(&s->fmt->format);
unsigned int rate;
rate = (unsigned int) roundf(samp_rate / ((float) whennext));
ast_settimeout(s->owner, rate, ast_fsread_audio, s);
} else {
s->owner->streamid = ast_sched_add(s->owner->sched,
whennext / (ast_format_rate(&s->fmt->format) / 1000), ast_fsread_audio, s);
}
s->lasttimeout = whennext;
return FSREAD_SUCCESS_NOSCHED;
}
return FSREAD_SUCCESS_SCHED;
return_failure:
s->owner->streamid = -1;
ast_settimeout(s->owner, 0, NULL, NULL);
return FSREAD_FAILURE;
}
static int ast_fsread_audio(const void *data)
{
struct ast_filestream *fs = (struct ast_filestream *)data;
enum fsread_res res;
res = ast_readaudio_callback(fs);
if (res == FSREAD_SUCCESS_SCHED)
return 1;
return 0;
}
static int ast_fsread_video(const void *data);
static enum fsread_res ast_readvideo_callback(struct ast_filestream *s)
{
int whennext = 0;
while (!whennext) {
struct ast_frame *fr = read_frame(s, &whennext);
if (!fr /* stream complete */ || ast_write(s->owner, fr) /* error writing */) {
if (fr) {
ast_log(LOG_WARNING, "Failed to write frame\n");
ast_frfree(fr);
}
s->owner->vstreamid = -1;
return FSREAD_FAILURE;
}
if (fr) {
ast_frfree(fr);
}
}
if (whennext != s->lasttimeout) {
s->owner->vstreamid = ast_sched_add(s->owner->sched,
whennext / (ast_format_rate(&s->fmt->format) / 1000),
ast_fsread_video, s);
s->lasttimeout = whennext;
return FSREAD_SUCCESS_NOSCHED;
}
return FSREAD_SUCCESS_SCHED;
}
static int ast_fsread_video(const void *data)
{
struct ast_filestream *fs = (struct ast_filestream *)data;
enum fsread_res res;
res = ast_readvideo_callback(fs);
if (res == FSREAD_SUCCESS_SCHED)
return 1;
return 0;
}
int ast_applystream(struct ast_channel *chan, struct ast_filestream *s)
{
s->owner = chan;
return 0;
}
int ast_playstream(struct ast_filestream *s)
{
enum fsread_res res;
if (AST_FORMAT_GET_TYPE(s->fmt->format.id) == AST_FORMAT_TYPE_AUDIO)
res = ast_readaudio_callback(s);
else
res = ast_readvideo_callback(s);
return (res == FSREAD_FAILURE) ? -1 : 0;
}
int ast_seekstream(struct ast_filestream *fs, off_t sample_offset, int whence)
{
return fs->fmt->seek(fs, sample_offset, whence);
}
int ast_truncstream(struct ast_filestream *fs)
{
return fs->fmt->trunc(fs);
}
off_t ast_tellstream(struct ast_filestream *fs)
{
return fs->fmt->tell(fs);
}
int ast_stream_fastforward(struct ast_filestream *fs, off_t ms)
{
return ast_seekstream(fs, ms * DEFAULT_SAMPLES_PER_MS, SEEK_CUR);
}
int ast_stream_rewind(struct ast_filestream *fs, off_t ms)
{
return ast_seekstream(fs, -ms * DEFAULT_SAMPLES_PER_MS, SEEK_CUR);
}
int ast_closestream(struct ast_filestream *f)
{
/* This used to destroy the filestream, but it now just decrements a refcount.
* We need to force the stream to quit queuing frames now, because we might
* change the writeformat, which could result in a subsequent write error, if
* the format is different. */
/* Stop a running stream if there is one */
if (f->owner) {
if (AST_FORMAT_GET_TYPE(f->fmt->format.id) == AST_FORMAT_TYPE_AUDIO) {
f->owner->stream = NULL;
AST_SCHED_DEL(f->owner->sched, f->owner->streamid);
ast_settimeout(f->owner, 0, NULL, NULL);
} else {
f->owner->vstream = NULL;
AST_SCHED_DEL(f->owner->sched, f->owner->vstreamid);
}
}
ao2_ref(f, -1);
return 0;
}
/*
* Look the various language-specific places where a file could exist.
*/
int ast_fileexists(const char *filename, const char *fmt, const char *preflang)
{
char *buf;
int buflen;
if (preflang == NULL)
preflang = "";
buflen = strlen(preflang) + strlen(filename) + 4; /* room for everything */
buf = alloca(buflen);
if (buf == NULL)
return 0;
return fileexists_core(filename, fmt, preflang, buf, buflen, NULL) ? 1 : 0;
}
int ast_filedelete(const char *filename, const char *fmt)
{
return filehelper(filename, NULL, fmt, ACTION_DELETE);
}
int ast_filerename(const char *filename, const char *filename2, const char *fmt)
{
return filehelper(filename, filename2, fmt, ACTION_RENAME);
}
int ast_filecopy(const char *filename, const char *filename2, const char *fmt)
{
return filehelper(filename, filename2, fmt, ACTION_COPY);
}
int ast_streamfile(struct ast_channel *chan, const char *filename, const char *preflang)
{
struct ast_filestream *fs;
struct ast_filestream *vfs=NULL;
char fmt[256];
int seekattempt;
int res;
fs = ast_openstream(chan, filename, preflang);
if (!fs) {
ast_log(LOG_WARNING, "Unable to open %s (format %s): %s\n", filename, ast_getformatname_multiple(fmt, sizeof(fmt), chan->nativeformats), strerror(errno));
return -1;
}
/* check to see if there is any data present (not a zero length file),
* done this way because there is no where for ast_openstream_full to
* return the file had no data. */
seekattempt = fseek(fs->f, -1, SEEK_END);
if (seekattempt && errno == EINVAL) {
/* Zero-length file, as opposed to a pipe */
return 0;
} else {
ast_seekstream(fs, 0, SEEK_SET);
}
vfs = ast_openvstream(chan, filename, preflang);
if (vfs) {
ast_debug(1, "Ooh, found a video stream, too, format %s\n", ast_getformatname(&vfs->fmt->format));
}
if (ast_test_flag(chan, AST_FLAG_MASQ_NOSTREAM))
fs->orig_chan_name = ast_strdup(chan->name);
if (ast_applystream(chan, fs))
return -1;
if (vfs && ast_applystream(chan, vfs))
return -1;
res = ast_playstream(fs);
if (!res && vfs)
res = ast_playstream(vfs);
ast_verb(3, "<%s> Playing '%s.%s' (language '%s')\n", chan->name, filename, ast_getformatname(&chan->writeformat), preflang ? preflang : "default");
return res;
}
struct ast_filestream *ast_readfile(const char *filename, const char *type, const char *comment, int flags, int check, mode_t mode)
{
FILE *bfile;
struct ast_format_def *f;
struct ast_filestream *fs = NULL;
char *fn;
int format_found = 0;
AST_RWLIST_RDLOCK(&formats);
AST_RWLIST_TRAVERSE(&formats, f, list) {
fs = NULL;
if (!exts_compare(f->exts, type))
continue;
else
format_found = 1;
fn = build_filename(filename, type);
errno = 0;
bfile = fopen(fn, "r");
if (!bfile || (fs = get_filestream(f, bfile)) == NULL || open_wrapper(fs) ) {
ast_log(LOG_WARNING, "Unable to open %s\n", fn);
if (fs) {
ast_closestream(fs);
}
fs = NULL;
bfile = NULL;
ast_free(fn);
break;
}
/* found it */
fs->trans = NULL;
fs->fmt = f;
fs->flags = flags;
fs->mode = mode;
fs->filename = ast_strdup(filename);
fs->vfs = NULL;
break;
}
AST_RWLIST_UNLOCK(&formats);
if (!format_found)
ast_log(LOG_WARNING, "No such format '%s'\n", type);
return fs;
}
struct ast_filestream *ast_writefile(const char *filename, const char *type, const char *comment, int flags, int check, mode_t mode)
{
int fd, myflags = 0;
/* compiler claims this variable can be used before initialization... */
FILE *bfile = NULL;
struct ast_format_def *f;
struct ast_filestream *fs = NULL;
char *buf = NULL;
size_t size = 0;
int format_found = 0;
AST_RWLIST_RDLOCK(&formats);
/* set the O_TRUNC flag if and only if there is no O_APPEND specified */
/* We really can't use O_APPEND as it will break WAV header updates */
if (flags & O_APPEND) {
flags &= ~O_APPEND;
} else {
myflags = O_TRUNC;
}
myflags |= O_WRONLY | O_CREAT;
/* XXX need to fix this - we should just do the fopen,
* not open followed by fdopen()
*/
AST_RWLIST_TRAVERSE(&formats, f, list) {
char *fn, *orig_fn = NULL;
if (fs)
break;
if (!exts_compare(f->exts, type))
continue;
else
format_found = 1;
fn = build_filename(filename, type);
fd = open(fn, flags | myflags, mode);
if (fd > -1) {
/* fdopen() the resulting file stream */
bfile = fdopen(fd, ((flags | myflags) & O_RDWR) ? "w+" : "w");
if (!bfile) {
ast_log(LOG_WARNING, "Whoa, fdopen failed: %s!\n", strerror(errno));
close(fd);
fd = -1;
}
}
if (ast_opt_cache_record_files && (fd > -1)) {
char *c;
fclose(bfile); /* this also closes fd */
/*
We touch orig_fn just as a place-holder so other things (like vmail) see the file is there.
What we are really doing is writing to record_cache_dir until we are done then we will mv the file into place.
*/
orig_fn = ast_strdupa(fn);
for (c = fn; *c; c++)
if (*c == '/')
*c = '_';
size = strlen(fn) + strlen(record_cache_dir) + 2;
buf = alloca(size);
strcpy(buf, record_cache_dir);
strcat(buf, "/");
strcat(buf, fn);
ast_free(fn);
fn = buf;
fd = open(fn, flags | myflags, mode);
if (fd > -1) {
/* fdopen() the resulting file stream */
bfile = fdopen(fd, ((flags | myflags) & O_RDWR) ? "w+" : "w");
if (!bfile) {
ast_log(LOG_WARNING, "Whoa, fdopen failed: %s!\n", strerror(errno));
close(fd);
fd = -1;
}
}
}
if (fd > -1) {
errno = 0;
fs = get_filestream(f, bfile);
if (fs) {
if ((fs->write_buffer = ast_malloc(32768))) {
setvbuf(fs->f, fs->write_buffer, _IOFBF, 32768);
}
}
if (!fs || rewrite_wrapper(fs, comment)) {
ast_log(LOG_WARNING, "Unable to rewrite %s\n", fn);
close(fd);
if (orig_fn) {
unlink(fn);
unlink(orig_fn);
}
if (fs) {
ast_closestream(fs);
fs = NULL;
}
continue;
}
fs->trans = NULL;
fs->fmt = f;
fs->flags = flags;
fs->mode = mode;
if (orig_fn) {
fs->realfilename = ast_strdup(orig_fn);
fs->filename = ast_strdup(fn);
} else {
fs->realfilename = NULL;
fs->filename = ast_strdup(filename);
}
fs->vfs = NULL;
/* If truncated, we'll be at the beginning; if not truncated, then append */
f->seek(fs, 0, SEEK_END);
} else if (errno != EEXIST) {
ast_log(LOG_WARNING, "Unable to open file %s: %s\n", fn, strerror(errno));
if (orig_fn)
unlink(orig_fn);
}
/* if buf != NULL then fn is already free and pointing to it */
if (!buf)
ast_free(fn);
}
AST_RWLIST_UNLOCK(&formats);
if (!format_found)
ast_log(LOG_WARNING, "No such format '%s'\n", type);
return fs;
}
/*!
* \brief the core of all waitstream() functions
*/
static int waitstream_core(struct ast_channel *c, const char *breakon,
const char *forward, const char *reverse, int skip_ms,
int audiofd, int cmdfd, const char *context)
{
const char *orig_chan_name = NULL;
int err = 0;
if (!breakon)
breakon = "";
if (!forward)
forward = "";
if (!reverse)
reverse = "";
/* Switch the channel to end DTMF frame only. waitstream_core doesn't care about the start of DTMF. */
ast_set_flag(c, AST_FLAG_END_DTMF_ONLY);
if (ast_test_flag(c, AST_FLAG_MASQ_NOSTREAM))
orig_chan_name = ast_strdupa(c->name);
while (c->stream) {
int res;
int ms;
if (orig_chan_name && strcasecmp(orig_chan_name, c->name)) {
ast_stopstream(c);
err = 1;
break;
}
ms = ast_sched_wait(c->sched);
if (ms < 0 && !c->timingfunc) {
ast_stopstream(c);
break;
}
if (ms < 0)
ms = 1000;
if (cmdfd < 0) {
res = ast_waitfor(c, ms);
if (res < 0) {
ast_log(LOG_WARNING, "Select failed (%s)\n", strerror(errno));
ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
return res;
}
} else {
int outfd;
struct ast_channel *rchan = ast_waitfor_nandfds(&c, 1, &cmdfd, (cmdfd > -1) ? 1 : 0, NULL, &outfd, &ms);
if (!rchan && (outfd < 0) && (ms)) {
/* Continue */
if (errno == EINTR)
continue;
ast_log(LOG_WARNING, "Wait failed (%s)\n", strerror(errno));
ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
return -1;
} else if (outfd > -1) { /* this requires cmdfd set */
/* The FD we were watching has something waiting */
ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
return 1;
}
/* if rchan is set, it is 'c' */
res = rchan ? 1 : 0; /* map into 'res' values */
}
if (res > 0) {
struct ast_frame *fr = ast_read(c);
if (!fr) {
ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
return -1;
}
switch (fr->frametype) {
case AST_FRAME_DTMF_END:
if (context) {
const char exten[2] = { fr->subclass.integer, '\0' };
if (ast_exists_extension(c, context, exten, 1,
S_COR(c->caller.id.number.valid, c->caller.id.number.str, NULL))) {
res = fr->subclass.integer;
ast_frfree(fr);
ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
return res;
}
} else {
res = fr->subclass.integer;
if (strchr(forward, res)) {
int eoftest;
ast_stream_fastforward(c->stream, skip_ms);
eoftest = fgetc(c->stream->f);
if (feof(c->stream->f)) {
ast_stream_rewind(c->stream, skip_ms);
} else {
ungetc(eoftest, c->stream->f);
}
} else if (strchr(reverse, res)) {
ast_stream_rewind(c->stream, skip_ms);
} else if (strchr(breakon, res)) {
ast_frfree(fr);
ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
return res;
}
}
break;
case AST_FRAME_CONTROL:
switch (fr->subclass.integer) {
case AST_CONTROL_HANGUP:
case AST_CONTROL_BUSY:
case AST_CONTROL_CONGESTION:
ast_frfree(fr);
ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
return -1;
case AST_CONTROL_RINGING:
case AST_CONTROL_ANSWER:
case AST_CONTROL_VIDUPDATE:
case AST_CONTROL_SRCUPDATE:
case AST_CONTROL_SRCCHANGE:
case AST_CONTROL_HOLD:
case AST_CONTROL_UNHOLD:
case AST_CONTROL_CONNECTED_LINE:
case AST_CONTROL_REDIRECTING:
case AST_CONTROL_AOC:
case -1:
/* Unimportant */
break;
default:
ast_log(LOG_WARNING, "Unexpected control subclass '%d'\n", fr->subclass.integer);
}
break;
case AST_FRAME_VOICE:
/* Write audio if appropriate */
if (audiofd > -1) {
if (write(audiofd, fr->data.ptr, fr->datalen) < 0) {
ast_log(LOG_WARNING, "write() failed: %s\n", strerror(errno));
}
}
default:
/* Ignore all others */
break;
}
ast_frfree(fr);
}
ast_sched_runq(c->sched);
}
ast_clear_flag(c, AST_FLAG_END_DTMF_ONLY);
return (err || c->_softhangup) ? -1 : 0;
}
int ast_waitstream_fr(struct ast_channel *c, const char *breakon, const char *forward, const char *reverse, int ms)
{
return waitstream_core(c, breakon, forward, reverse, ms,
-1 /* no audiofd */, -1 /* no cmdfd */, NULL /* no context */);
}
int ast_waitstream(struct ast_channel *c, const char *breakon)
{
return waitstream_core(c, breakon, NULL, NULL, 0, -1, -1, NULL);
}
int ast_waitstream_full(struct ast_channel *c, const char *breakon, int audiofd, int cmdfd)
{
return waitstream_core(c, breakon, NULL, NULL, 0,
audiofd, cmdfd, NULL /* no context */);
}
int ast_waitstream_exten(struct ast_channel *c, const char *context)
{
/* Waitstream, with return in the case of a valid 1 digit extension */
/* in the current or specified context being pressed */
if (!context)
context = c->context;
return waitstream_core(c, NULL, NULL, NULL, 0,
-1, -1, context);
}
/*
* if the file name is non-empty, try to play it.
* Return 0 if success, -1 if error, digit if interrupted by a digit.
* If digits == "" then we can simply check for non-zero.
*/
int ast_stream_and_wait(struct ast_channel *chan, const char *file, const char *digits)
{
int res = 0;
if (!ast_strlen_zero(file)) {
res = ast_streamfile(chan, file, chan->language);
if (!res) {
res = ast_waitstream(chan, digits);
}
}
return res;
}
char *ast_format_str_reduce(char *fmts)
{
struct ast_format_def *f;
struct ast_format_def *fmts_ptr[AST_MAX_FORMATS];
char *fmts_str[AST_MAX_FORMATS];
char *stringp, *type;
char *orig = fmts;
int i, j, x, first, found = 0;
int len = strlen(fmts) + 1;
int res;
if (AST_RWLIST_RDLOCK(&formats)) {
ast_log(LOG_WARNING, "Unable to lock format list\n");
return NULL;
}
stringp = ast_strdupa(fmts);
for (x = 0; (type = strsep(&stringp, "|")) && x < AST_MAX_FORMATS; x++) {
AST_RWLIST_TRAVERSE(&formats, f, list) {
if (exts_compare(f->exts, type)) {
found = 1;
break;
}
}
fmts_str[x] = type;
if (found) {
fmts_ptr[x] = f;
} else {
fmts_ptr[x] = NULL;
}
}
AST_RWLIST_UNLOCK(&formats);
first = 1;
for (i = 0; i < x; i++) {
/* ignore invalid entries */
if (!fmts_ptr[i]) {
ast_log(LOG_WARNING, "ignoring unknown format '%s'\n", fmts_str[i]);
continue;
}
/* special handling for the first entry */
if (first) {
res = snprintf(fmts, len, "%s", fmts_str[i]);
fmts += res;
len -= res;
first = 0;
continue;
}
found = 0;
for (j = 0; j < i; j++) {
/* this is a duplicate */
if (fmts_ptr[j] == fmts_ptr[i]) {
found = 1;
break;
}
}
if (!found) {
res = snprintf(fmts, len, "|%s", fmts_str[i]);
fmts += res;
len -= res;
}
}
if (first) {
ast_log(LOG_WARNING, "no known formats found in format list (%s)\n", orig);
return NULL;
}
return orig;
}
static char *handle_cli_core_show_file_formats(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
#define FORMAT "%-10s %-10s %-20s\n"
#define FORMAT2 "%-10s %-10s %-20s\n"
struct ast_format_def *f;
int count_fmt = 0;
switch (cmd) {
case CLI_INIT:
e->command = "core show file formats";
e->usage =
"Usage: core show file formats\n"
" Displays currently registered file formats (if any).\n";
return NULL;
case CLI_GENERATE:
return NULL;
}
if (a->argc != 4)
return CLI_SHOWUSAGE;
ast_cli(a->fd, FORMAT, "Format", "Name", "Extensions");
ast_cli(a->fd, FORMAT, "------", "----", "----------");
AST_RWLIST_RDLOCK(&formats);
AST_RWLIST_TRAVERSE(&formats, f, list) {
ast_cli(a->fd, FORMAT2, ast_getformatname(&f->format), f->name, f->exts);
count_fmt++;
}
AST_RWLIST_UNLOCK(&formats);
ast_cli(a->fd, "%d file formats registered.\n", count_fmt);
return CLI_SUCCESS;
#undef FORMAT
#undef FORMAT2
}
static struct ast_cli_entry cli_file[] = {
AST_CLI_DEFINE(handle_cli_core_show_file_formats, "Displays file formats")
};
int ast_file_init(void)
{
ast_cli_register_multiple(cli_file, ARRAY_LEN(cli_file));
return 0;
}
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