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merge rizzo's codec module rework (very similar to the format module rework)

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@18541 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Kevin P. Fleming
2006-04-08 21:40:57 +00:00
parent 1481e53ba8
commit 1bba6ec6fc
12 changed files with 1509 additions and 2659 deletions
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235
codecs/codec_a_mu.c
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@@ -43,12 +43,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/ulaw.h"
#include "asterisk/utils.h"
#define BUFFER_SIZE 8096 /* size for the translation buffers */
AST_MUTEX_DEFINE_STATIC(localuser_lock);
static int localusecnt = 0;
static char *tdesc = "A-law and Mulaw direct Coder/Decoder";
#define BUFFER_SAMPLES 8000 /* size for the translation buffers */
static unsigned char mu2a[256];
static unsigned char a2mu[256];
@@ -57,146 +52,37 @@ static unsigned char a2mu[256];
#include "ulaw_slin_ex.h"
/*
* Private workspace for translating signed linear signals to alaw.
*/
struct alaw_encoder_pvt
/*! \brief convert frame data and store into the buffer */
static int alawtoulaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
{
struct ast_frame f;
char offset[AST_FRIENDLY_OFFSET]; /* Space to build offset */
unsigned char outbuf[BUFFER_SIZE]; /* Encoded alaw, two nibbles to a word */
int tail;
};
/*
* Private workspace for translating laws.
*/
struct ulaw_encoder_pvt
{
struct ast_frame f;
char offset[AST_FRIENDLY_OFFSET]; /* Space to build offset */
unsigned char outbuf[BUFFER_SIZE]; /* Encoded ulaw values */
int tail;
};
static struct ast_translator_pvt *alawtoulaw_new(void)
{
struct ulaw_encoder_pvt *tmp;
if ((tmp = ast_calloc(1, sizeof(*tmp)))) {
tmp->tail = 0;
localusecnt++;
ast_update_use_count();
}
return (struct ast_translator_pvt *)tmp;
}
static struct ast_translator_pvt *ulawtoalaw_new(void)
{
struct alaw_encoder_pvt *tmp;
if ((tmp = ast_calloc(1, sizeof(*tmp)))) {
localusecnt++;
ast_update_use_count();
tmp->tail = 0;
}
return (struct ast_translator_pvt *)tmp;
}
static int alawtoulaw_framein(struct ast_translator_pvt *pvt, struct ast_frame *f)
{
struct ulaw_encoder_pvt *tmp = (struct ulaw_encoder_pvt *)pvt;
int x;
unsigned char *b;
unsigned char *src = f->data;
unsigned char *dst = (unsigned char *)pvt->outbuf + pvt->samples;
if ((tmp->tail + f->datalen) > sizeof(tmp->outbuf)) {
ast_log(LOG_WARNING, "Out of buffer space\n");
return -1;
}
/* Reset ssindex and signal to frame's specified values */
b = f->data;
for (x=0;x<f->datalen;x++)
tmp->outbuf[tmp->tail + x] = a2mu[b[x]];
tmp->tail += f->datalen;
for ( x = 0 ; x < f->samples; x++)
dst[x] = a2mu[src[x]];
pvt->samples += f->samples;
pvt->datalen += f->datalen;
return 0;
}
static struct ast_frame *alawtoulaw_frameout(struct ast_translator_pvt *pvt)
/*! \brief convert frame data and store into the buffer */
static int ulawtoalaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
{
struct ulaw_encoder_pvt *tmp = (struct ulaw_encoder_pvt *)pvt;
if (!tmp->tail)
return NULL;
tmp->f.frametype = AST_FRAME_VOICE;
tmp->f.subclass = AST_FORMAT_ULAW;
tmp->f.datalen = tmp->tail;
tmp->f.samples = tmp->tail;
tmp->f.mallocd = 0;
tmp->f.offset = AST_FRIENDLY_OFFSET;
tmp->f.src = __PRETTY_FUNCTION__;
tmp->f.data = tmp->outbuf;
tmp->tail = 0;
return &tmp->f;
}
static int ulawtoalaw_framein(struct ast_translator_pvt *pvt, struct ast_frame *f)
{
struct alaw_encoder_pvt *tmp = (struct alaw_encoder_pvt *)pvt;
int x;
unsigned char *s;
if (tmp->tail + f->datalen >= sizeof(tmp->outbuf)) {
ast_log(LOG_WARNING, "Out of buffer space\n");
return -1;
}
s = f->data;
for (x=0;x<f->datalen;x++)
tmp->outbuf[x+tmp->tail] = mu2a[s[x]];
tmp->tail += f->datalen;
unsigned char *src = f->data;
unsigned char *dst = (unsigned char *)pvt->outbuf + pvt->samples;
for ( x = 0 ; x < f->samples; x++)
dst[x] = mu2a[src[x]];
pvt->samples += f->samples;
pvt->datalen += f->datalen;
return 0;
}
/*
* LinToalaw_FrameOut
* Convert a buffer of raw 16-bit signed linear PCM to a buffer
* of 4-bit alaw packed two to a byte (Big Endian).
*
* Results:
* Foo
*
* Side effects:
* Leftover inbuf data gets packed, tail gets updated.
* alawToLin_Sample. Just random data, somehow...
*/
static struct ast_frame *ulawtoalaw_frameout(struct ast_translator_pvt *pvt)
{
struct alaw_encoder_pvt *tmp = (struct alaw_encoder_pvt *)pvt;
if (tmp->tail) {
tmp->f.frametype = AST_FRAME_VOICE;
tmp->f.subclass = AST_FORMAT_ALAW;
tmp->f.samples = tmp->tail;
tmp->f.mallocd = 0;
tmp->f.offset = AST_FRIENDLY_OFFSET;
tmp->f.src = __PRETTY_FUNCTION__;
tmp->f.data = tmp->outbuf;
tmp->f.datalen = tmp->tail;
tmp->tail = 0;
return &tmp->f;
} else
return NULL;
}
/*
* alawToLin_Sample
*/
static struct ast_frame *alawtoulaw_sample(void)
{
static struct ast_frame f;
@@ -207,7 +93,7 @@ static struct ast_frame *alawtoulaw_sample(void)
f.mallocd = 0;
f.offset = 0;
f.src = __PRETTY_FUNCTION__;
f.data = ulaw_slin_ex;
f.data = ulaw_slin_ex; /* XXX what ? */
return &f;
}
@@ -225,66 +111,41 @@ static struct ast_frame *ulawtoalaw_sample(void)
return &f;
}
/*
* alaw_Destroy
* Destroys a private workspace.
*
* Results:
* It's gone!
*
* Side effects:
* None.
*/
static void alaw_destroy(struct ast_translator_pvt *pvt)
{
free(pvt);
localusecnt--;
ast_update_use_count();
}
/*
* The complete translator for alawToLin.
*/
static struct ast_module_lock me = { .usecnt = -1 };
static struct ast_translator alawtoulaw = {
"alawtoulaw",
AST_FORMAT_ALAW,
AST_FORMAT_ULAW,
alawtoulaw_new,
alawtoulaw_framein,
alawtoulaw_frameout,
alaw_destroy,
/* NULL */
alawtoulaw_sample
.name = "alawtoulaw",
.srcfmt = AST_FORMAT_ALAW,
.dstfmt = AST_FORMAT_ULAW,
.framein = alawtoulaw_framein,
.sample = alawtoulaw_sample,
.buffer_samples = BUFFER_SAMPLES,
.buf_size = BUFFER_SAMPLES,
.lockp = &me,
};
/*
* The complete translator for LinToalaw.
*/
static struct ast_translator ulawtoalaw = {
"ulawtoalaw",
AST_FORMAT_ULAW,
AST_FORMAT_ALAW,
ulawtoalaw_new,
ulawtoalaw_framein,
ulawtoalaw_frameout,
alaw_destroy,
/* NULL */
ulawtoalaw_sample
.name = "ulawtoalaw",
.srcfmt = AST_FORMAT_ULAW,
.dstfmt = AST_FORMAT_ALAW,
.framein = ulawtoalaw_framein,
.sample = ulawtoalaw_sample,
.buffer_samples = BUFFER_SAMPLES,
.buf_size = BUFFER_SAMPLES,
.lockp = &me,
};
/*! \brief standard module glue */
int unload_module(void)
{
int res;
ast_mutex_lock(&localuser_lock);
ast_mutex_lock(&me.lock);
res = ast_unregister_translator(&ulawtoalaw);
if (!res)
res = ast_unregister_translator(&alawtoulaw);
if (localusecnt)
res |= ast_unregister_translator(&alawtoulaw);
if (me.usecnt)
res = -1;
ast_mutex_unlock(&localuser_lock);
ast_mutex_unlock(&me.lock);
return res;
}
@@ -304,20 +165,14 @@ int load_module(void)
return res;
}
/*
* Return a description of this module.
*/
char *description(void)
{
return tdesc;
return "A-law and Mulaw direct Coder/Decoder";
}
int usecount(void)
{
int res;
OLD_STANDARD_USECOUNT(res);
return res;
return me.usecnt;
}
char *key()