[Asterisk-cvs] asterisk/formats format_au.c, NONE, 1.1 Makefile,
1.19, 1.20
kpfleming at lists.digium.com
kpfleming at lists.digium.com
Fri Jun 3 17:49:03 CDT 2005
Update of /usr/cvsroot/asterisk/formats
In directory mongoose.digium.com:/tmp/cvs-serv10763/formats
Modified Files:
Makefile
Added Files:
format_au.c
Log Message:
add support for Sun Microsystems AU audio format (bug #4428 with minor mods)
remove hardcoded format list from app_record help text
--- NEW FILE: format_au.c ---
/*
* Asterisk -- A telephony toolkit for Linux.
*
* Work with Sun Microsystems AU format.
*
* Copyright (C) 2005, Andriy Pylypenko
* Code based on format_wav.c by Mark Spencer
*
* This program is free software, distributed under the terms of
* the GNU General Public License
*/
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <sys/time.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#ifdef __linux__
#include <endian.h>
#else
#include <machine/endian.h>
#endif
#include "asterisk/lock.h"
#include "asterisk/channel.h"
#include "asterisk/file.h"
#include "asterisk/logger.h"
#include "asterisk/sched.h"
#include "asterisk/module.h"
#define BUF_SIZE 160
#define AU_HEADER_SIZE 24
#define AU_HEADER(var) u_int32_t var[6]
#define AU_HDR_MAGIC_OFF 0
#define AU_HDR_HDR_SIZE_OFF 1
#define AU_HDR_DATA_SIZE_OFF 2
#define AU_HDR_ENCODING_OFF 3
#define AU_HDR_SAMPLE_RATE_OFF 4
#define AU_HDR_CHANNELS_OFF 5
#define AU_ENC_8BIT_ULAW 1
struct ast_filestream {
void *reserved[AST_RESERVED_POINTERS];
/* This is what a filestream means to us */
int fd; /* Descriptor */
struct ast_channel *owner;
struct ast_frame fr; /* Frame information */
char waste[AST_FRIENDLY_OFFSET]; /* Buffer for sending frames, etc */
char empty; /* Empty character */
short buf[BUF_SIZE];
};
AST_MUTEX_DEFINE_STATIC(au_lock);
static int localusecnt = 0;
static char *name = "au";
static char *desc = "Sun Microsystems AU format (signed linear)";
static char *exts = "au";
#define AU_MAGIC 0x2e736e64
#if __BYTE_ORDER == __BIG_ENDIAN
#define htoll(b) (b)
#define htols(b) (b)
#define ltohl(b) (b)
#define ltohs(b) (b)
#else
#if __BYTE_ORDER == __LITTLE_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)
{
AU_HEADER(header);
u_int32_t magic;
u_int32_t hdr_size;
u_int32_t data_size;
u_int32_t encoding;
u_int32_t sample_rate;
u_int32_t channels;
if (read(fd, header, AU_HEADER_SIZE) != AU_HEADER_SIZE) {
ast_log(LOG_WARNING, "Read failed (header)\n");
return -1;
}
magic = ltohl(header[AU_HDR_MAGIC_OFF]);
if (magic != (u_int32_t) AU_MAGIC) {
ast_log(LOG_WARNING, "Bad magic: 0x%x\n", magic);
}
/* hdr_size = ltohl(header[AU_HDR_HDR_SIZE_OFF]);
if (hdr_size < AU_HEADER_SIZE)*/
hdr_size = AU_HEADER_SIZE;
/* data_size = ltohl(header[AU_HDR_DATA_SIZE_OFF]); */
encoding = ltohl(header[AU_HDR_ENCODING_OFF]);
if (encoding != AU_ENC_8BIT_ULAW) {
ast_log(LOG_WARNING, "Unexpected format: %d. Only 8bit ULAW allowed (%d)\n", encoding, AU_ENC_8BIT_ULAW);
return -1;
}
sample_rate = ltohl(header[AU_HDR_SAMPLE_RATE_OFF]);
if (sample_rate != 8000) {
ast_log(LOG_WARNING, "Sample rate can only be 8000 not %d\n", sample_rate);
return -1;
}
channels = ltohl(header[AU_HDR_CHANNELS_OFF]);
if (channels != 1) {
ast_log(LOG_WARNING, "Not in mono: channels=%d\n", channels);
return -1;
}
/* Skip to data */
data_size = lseek(fd, 0, SEEK_END) - hdr_size;
if (lseek(fd, hdr_size, SEEK_SET) == -1 ) {
ast_log(LOG_WARNING, "Failed to skip to data: %d\n", hdr_size);
return -1;
}
return data_size;
}
static int update_header(int fd)
{
off_t cur, end;
u_int32_t datalen;
int bytes;
cur = lseek(fd, 0, SEEK_CUR);
end = lseek(fd, 0, SEEK_END);
/* data starts 24 bytes in */
bytes = end - AU_HEADER_SIZE;
datalen = htoll(bytes);
if (cur < 0) {
ast_log(LOG_WARNING, "Unable to find our position\n");
return -1;
}
if (lseek(fd, AU_HDR_DATA_SIZE_OFF * sizeof(u_int32_t), SEEK_SET) != (AU_HDR_DATA_SIZE_OFF * sizeof(u_int32_t))) {
ast_log(LOG_WARNING, "Unable to set our position\n");
return -1;
}
if (write(fd, &datalen, sizeof(datalen)) != sizeof(datalen)) {
ast_log(LOG_WARNING, "Unable to set write file size\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)
{
AU_HEADER(header);
header[AU_HDR_MAGIC_OFF] = htoll((u_int32_t) AU_MAGIC);
header[AU_HDR_HDR_SIZE_OFF] = htoll(AU_HEADER_SIZE);
header[AU_HDR_DATA_SIZE_OFF] = 0;
header[AU_HDR_ENCODING_OFF] = htoll(AU_ENC_8BIT_ULAW);
header[AU_HDR_SAMPLE_RATE_OFF] = htoll(8000);
header[AU_HDR_CHANNELS_OFF] = htoll(1);
/* Write an au header, ignoring sizes which will be filled in later */
lseek(fd, 0, SEEK_SET);
if (write(fd, header, AU_HEADER_SIZE) != AU_HEADER_SIZE) {
ast_log(LOG_WARNING, "Unable to write header\n");
return -1;
}
return 0;
}
static struct ast_filestream *au_open(int fd)
{
struct ast_filestream *tmp;
if (!(tmp = malloc(sizeof(struct ast_filestream)))) {
ast_log(LOG_WARNING, "Out of memory\n");
return NULL;
}
memset(tmp, 0, sizeof(struct ast_filestream));
if (check_header(fd) < 0) {
free(tmp);
return NULL;
}
if (ast_mutex_lock(&au_lock)) {
ast_log(LOG_WARNING, "Unable to lock au count\n");
free(tmp);
return NULL;
}
tmp->fd = fd;
tmp->fr.data = tmp->buf;
tmp->fr.frametype = AST_FRAME_VOICE;
tmp->fr.subclass = AST_FORMAT_ULAW;
/* datalen will vary for each frame */
tmp->fr.src = name;
tmp->fr.mallocd = 0;
localusecnt++;
ast_mutex_unlock(&au_lock);
ast_update_use_count();
return tmp;
}
static struct ast_filestream *au_rewrite(int fd, const char *comment)
{
struct ast_filestream *tmp;
if ((tmp = malloc(sizeof(struct ast_filestream))) == NULL) {
ast_log(LOG_WARNING, "Out of memory\n");
return NULL;
}
memset(tmp, 0, sizeof(struct ast_filestream));
if (write_header(fd)) {
free(tmp);
return NULL;
}
if (ast_mutex_lock(&au_lock)) {
ast_log(LOG_WARNING, "Unable to lock au count\n");
free(tmp);
return NULL;
}
tmp->fd = fd;
localusecnt++;
ast_mutex_unlock(&au_lock);
ast_update_use_count();
return tmp;
}
static void au_close(struct ast_filestream *s)
{
if (ast_mutex_lock(&au_lock)) {
ast_log(LOG_WARNING, "Unable to lock au count\n");
return;
}
localusecnt--;
ast_mutex_unlock(&au_lock);
ast_update_use_count();
close(s->fd);
free(s);
}
static struct ast_frame *au_read(struct ast_filestream *s, int *whennext)
{
int res;
int delay;
/* Send a frame from the file to the appropriate channel */
s->fr.frametype = AST_FRAME_VOICE;
s->fr.subclass = AST_FORMAT_ULAW;
s->fr.offset = AST_FRIENDLY_OFFSET;
s->fr.mallocd = 0;
s->fr.data = s->buf;
if ((res = read(s->fd, s->buf, BUF_SIZE)) < 1) {
if (res)
ast_log(LOG_WARNING, "Short read (%d) (%s)!\n", res, strerror(errno));
return NULL;
}
s->fr.samples = res;
s->fr.datalen = res;
delay = s->fr.samples;
*whennext = delay;
return &s->fr;
}
static int au_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_ULAW) {
ast_log(LOG_WARNING, "Asked to write non-ulaw frame (%d)!\n", f->subclass);
return -1;
}
if ((res = write(fs->fd, f->data, f->datalen)) != f->datalen) {
ast_log(LOG_WARNING, "Bad write (%d/%d): %s\n", res, f->datalen, strerror(errno));
return -1;
}
update_header(fs->fd);
return 0;
}
static int au_seek(struct ast_filestream *fs, long sample_offset, int whence)
{
off_t min, max, cur;
long offset = 0, samples;
samples = sample_offset;
min = AU_HEADER_SIZE;
cur = lseek(fs->fd, 0, SEEK_CUR);
max = lseek(fs->fd, 0, SEEK_END);
if (whence == SEEK_SET)
offset = samples + min;
else if (whence == SEEK_CUR || whence == SEEK_FORCECUR)
offset = samples + cur;
else if (whence == SEEK_END)
offset = max - samples;
if (whence != SEEK_FORCECUR) {
offset = (offset > max) ? max : offset;
}
/* always protect the header space. */
offset = (offset < min) ? min : offset;
return lseek(fs->fd, offset, SEEK_SET);
}
static int au_trunc(struct ast_filestream *fs)
{
if(ftruncate(fs->fd, lseek(fs->fd, 0, SEEK_CUR)))
return -1;
return update_header(fs->fd);
}
static long au_tell(struct ast_filestream *fs)
{
off_t offset;
offset = lseek(fs->fd, 0, SEEK_CUR);
return offset - AU_HEADER_SIZE;
}
static char *au_getcomment(struct ast_filestream *s)
{
return NULL;
}
int load_module()
{
return ast_format_register(name, exts, AST_FORMAT_ULAW,
au_open,
au_rewrite,
au_write,
au_seek,
au_trunc,
au_tell,
au_read,
au_close,
au_getcomment);
}
int unload_module()
{
return ast_format_unregister(name);
}
int usecount()
{
return localusecnt;
}
char *description()
{
return desc;
}
char *key()
{
return ASTERISK_GPL_KEY;
}
Index: Makefile
===================================================================
RCS file: /usr/cvsroot/asterisk/formats/Makefile,v
retrieving revision 1.19
retrieving revision 1.20
diff -u -d -r1.19 -r1.20
--- Makefile 29 Dec 2004 12:12:59 -0000 1.19
+++ Makefile 3 Jun 2005 21:52:00 -0000 1.20
@@ -14,7 +14,7 @@
FORMAT_LIBS=format_gsm.so format_wav.so \
format_wav_gsm.so format_vox.so format_pcm.so format_g729.so \
format_pcm_alaw.so format_h263.so format_g726.so format_ilbc.so \
- format_sln.so
+ format_sln.so format_au.so
FORMAT_LIBS+=format_jpeg.so
#
# G723 simple frame is depricated
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