[asterisk-commits] qwell: branch 1.8 r284701 - /branches/1.8/formats/format_wav.c
SVN commits to the Asterisk project
asterisk-commits at lists.digium.com
Thu Sep 2 11:43:14 CDT 2010
Author: qwell
Date: Thu Sep 2 11:43:09 2010
New Revision: 284701
URL: http://svnview.digium.com/svn/asterisk?view=rev&rev=284701
Log:
Add slin16 support for format_wav (new wav16 file extension)
(closes issue #15029)
Reported by: andrew
Patches:
wav16.patch uploaded by andrew (license 240)
Tested by: qwell, andrew
Modified:
branches/1.8/formats/format_wav.c
Modified: branches/1.8/formats/format_wav.c
URL: http://svnview.digium.com/svn/asterisk/branches/1.8/formats/format_wav.c?view=diff&rev=284701&r1=284700&r2=284701
==============================================================================
--- branches/1.8/formats/format_wav.c (original)
+++ branches/1.8/formats/format_wav.c Thu Sep 2 11:43:09 2010
@@ -39,6 +39,7 @@
#define WAV_BUF_SIZE 320
struct wav_desc { /* format-specific parameters */
+ int hz;
int bytes;
int lasttimeout;
int maxlen;
@@ -70,7 +71,7 @@
#endif
-static int check_header(FILE *f)
+static int check_header(FILE *f, int hz)
{
int type, size, formtype;
int fmt, hsize;
@@ -135,8 +136,10 @@
ast_log(LOG_WARNING, "Read failed (freq)\n");
return -1;
}
- if (ltohl(freq) != DEFAULT_SAMPLE_RATE) {
- ast_log(LOG_WARNING, "Unexpected frequency %d\n", ltohl(freq));
+ if (((ltohl(freq) != 8000) && (ltohl(freq) != 16000)) ||
+ ((ltohl(freq) == 8000) && (hz != 8000)) ||
+ ((ltohl(freq) == 16000) && (hz != 16000))) {
+ ast_log(LOG_WARNING, "Unexpected frequency mismatch %d (expecting %d)\n", ltohl(freq),hz);
return -1;
}
/* Ignore the byte frequency */
@@ -239,16 +242,24 @@
return 0;
}
-static int write_header(FILE *f)
-{
- unsigned int hz=htoll(8000);
- unsigned int bhz = htoll(16000);
+static int write_header(FILE *f, int writehz)
+{
+ unsigned int hz;
+ unsigned int bhz;
unsigned int hs = htoll(16);
unsigned short fmt = htols(1);
unsigned short chans = htols(1);
unsigned short bysam = htols(2);
unsigned short bisam = htols(16);
unsigned int size = htoll(0);
+
+ if (writehz == 16000) {
+ hz = htoll(16000);
+ bhz = htoll(32000);
+ } else {
+ hz = htoll(8000);
+ bhz = htoll(16000);
+ }
/* Write a wav header, ignoring sizes which will be filled in later */
fseek(f,0,SEEK_SET);
if (fwrite("RIFF", 1, 4, f) != 4) {
@@ -308,7 +319,7 @@
if we did, it would go here. We also might want to check
and be sure it's a valid file. */
struct wav_desc *tmp = (struct wav_desc *)s->_private;
- if ((tmp->maxlen = check_header(s->f)) < 0)
+ if ((tmp->maxlen = check_header(s->f, (s->fmt->format == AST_FORMAT_SLINEAR16 ? 16000 : 8000))) < 0)
return -1;
return 0;
}
@@ -319,7 +330,9 @@
if we did, it would go here. We also might want to check
and be sure it's a valid file. */
- if (write_header(s->f))
+ struct wav_desc *tmp = (struct wav_desc *)s->_private;
+ tmp->hz = (s->fmt->format == AST_FORMAT_SLINEAR16 ? 16000 : 8000);
+ if (write_header(s->f,tmp->hz))
return -1;
return 0;
}
@@ -349,10 +362,12 @@
int x;
#endif
short *tmp;
- int bytes = WAV_BUF_SIZE; /* in bytes */
+ int bytes;
off_t here;
/* Send a frame from the file to the appropriate channel */
struct wav_desc *fs = (struct wav_desc *)s->_private;
+
+ bytes = (fs->hz == 16000 ? (WAV_BUF_SIZE * 2) : WAV_BUF_SIZE);
here = ftello(s->f);
if (fs->maxlen - here < bytes) /* truncate if necessary */
@@ -361,7 +376,7 @@
bytes = 0;
/* ast_debug(1, "here: %d, maxlen: %d, bytes: %d\n", here, s->maxlen, bytes); */
s->fr.frametype = AST_FRAME_VOICE;
- s->fr.subclass.codec = AST_FORMAT_SLINEAR;
+ s->fr.subclass.codec = (fs->hz == 16000 ? AST_FORMAT_SLINEAR16 : AST_FORMAT_SLINEAR);
s->fr.mallocd = 0;
AST_FRAME_SET_BUFFER(&s->fr, s->buf, AST_FRIENDLY_OFFSET, bytes);
@@ -388,7 +403,7 @@
{
#if __BYTE_ORDER == __BIG_ENDIAN
int x;
- short tmp[8000], *tmpi;
+ short tmp[16000], *tmpi;
#endif
struct wav_desc *s = (struct wav_desc *)fs->_private;
int res;
@@ -397,8 +412,12 @@
ast_log(LOG_WARNING, "Asked to write non-voice frame!\n");
return -1;
}
- if (f->subclass.codec != AST_FORMAT_SLINEAR) {
- ast_log(LOG_WARNING, "Asked to write non-SLINEAR frame (%s)!\n", ast_getformatname(f->subclass.codec));
+ if ((f->subclass.codec != AST_FORMAT_SLINEAR) && (f->subclass.codec != AST_FORMAT_SLINEAR16)) {
+ ast_log(LOG_WARNING, "Asked to write non-SLINEAR%s frame (%s)!\n", s->hz == 16000 ? "16" : "", ast_getformatname(f->subclass.codec));
+ return -1;
+ }
+ if (f->subclass.codec != fs->fmt->format) {
+ ast_log(LOG_WARNING, "Can't change SLINEAR frequency during write\n");
return -1;
}
if (!f->datalen)
@@ -466,6 +485,22 @@
/* subtract header size to get samples, then divide by 2 for 16 bit samples */
return (offset - 44)/2;
}
+
+static const struct ast_format wav16_f = {
+ .name = "wav16",
+ .exts = "wav16",
+ .format = AST_FORMAT_SLINEAR16,
+ .open = wav_open,
+ .rewrite = wav_rewrite,
+ .write = wav_write,
+ .seek = wav_seek,
+ .trunc = wav_trunc,
+ .tell = wav_tell,
+ .read = wav_read,
+ .close = wav_close,
+ .buf_size = (WAV_BUF_SIZE * 2) + AST_FRIENDLY_OFFSET,
+ .desc_size = sizeof(struct wav_desc),
+};
static const struct ast_format wav_f = {
.name = "wav",
@@ -485,17 +520,19 @@
static int load_module(void)
{
- if (ast_format_register(&wav_f))
+ if (ast_format_register(&wav_f)
+ || ast_format_register(&wav16_f))
return AST_MODULE_LOAD_FAILURE;
return AST_MODULE_LOAD_SUCCESS;
}
static int unload_module(void)
{
- return ast_format_unregister(wav_f.name);
-}
-
-AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Microsoft WAV format (8000Hz Signed Linear)",
+ return ast_format_unregister(wav_f.name)
+ || ast_format_unregister(wav16_f.name);
+}
+
+AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Microsoft WAV/WAV16 format (8kHz/16kHz Signed Linear)",
.load = load_module,
.unload = unload_module,
.load_pri = AST_MODPRI_APP_DEPEND
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