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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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338
codecs/codec_alaw.c
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@@ -44,232 +44,42 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/alaw.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 Coder/Decoder";
static int useplc = 0;
#define BUFFER_SAMPLES 8096 /* size for the translation buffers */
/* Sample frame data (Mu data is okay) */
#include "slin_ulaw_ex.h"
#include "ulaw_slin_ex.h"
/*!
* \brief Private workspace for translating signed linear signals to alaw.
*/
struct alaw_encoder_pvt
/*! \brief decode frame into lin and fill output buffer. */
static int alawtolin_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;
};
int i;
unsigned char *src = f->data;
int16_t *dst = (int16_t *)pvt->outbuf;
/*!
* \brief Private workspace for translating alaw signals to signed linear.
*/
struct alaw_decoder_pvt
{
struct ast_frame f;
char offset[AST_FRIENDLY_OFFSET]; /* Space to build offset */
short outbuf[BUFFER_SIZE]; /* Decoded signed linear values */
int tail;
plc_state_t plc;
};
/*!
* \brief alawToLin_New
* Create a new instance of alaw_decoder_pvt.
*
* Results:
* Returns a pointer to the new instance.
*
* Side effects:
* None.
*/
static struct ast_translator_pvt *alawtolin_new(void)
{
struct alaw_decoder_pvt *tmp;
if ((tmp = ast_calloc(1, sizeof(*tmp)))) {
tmp->tail = 0;
plc_init(&tmp->plc);
localusecnt++;
ast_update_use_count();
}
return (struct ast_translator_pvt *)tmp;
}
/*!
* \brief LinToalaw_New
* Create a new instance of alaw_encoder_pvt.
*
* Results:
* Returns a pointer to the new instance.
*
* Side effects:
* None.
*/
static struct ast_translator_pvt *lintoalaw_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;
}
/*!
* \brief alawToLin_FrameIn
* Fill an input buffer with packed 4-bit alaw values if there is room
* left.
*
* Results:
* Foo
*
* Side effects:
* tmp->tail is the number of packed values in the buffer.
*/
static int alawtolin_framein(struct ast_translator_pvt *pvt, struct ast_frame *f)
{
struct alaw_decoder_pvt *tmp = (struct alaw_decoder_pvt *)pvt;
int x;
unsigned char *b;
if(f->datalen == 0) { /* perform PLC with nominal framesize of 20ms/160 samples */
if((tmp->tail + 160) * 2 > sizeof(tmp->outbuf)) {
ast_log(LOG_WARNING, "Out of buffer space\n");
return -1;
}
if(useplc) {
plc_fillin(&tmp->plc, tmp->outbuf+tmp->tail, 160);
tmp->tail += 160;
}
return 0;
}
if ((tmp->tail + f->datalen) * 2 > 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] = AST_ALAW(b[x]);
if(useplc)
plc_rx(&tmp->plc, tmp->outbuf+tmp->tail, f->datalen);
tmp->tail += f->datalen;
for ( i = 0; i < f->samples; i++)
dst[pvt->samples + i] = AST_ALAW(src[i]);
pvt->samples += f->samples;
pvt->datalen += 2*f->samples; /* 2 bytes/sample */
return 0;
}
/*!
* \brief alawToLin_FrameOut
* Convert 4-bit alaw encoded signals to 16-bit signed linear.
*
* Results:
* Converted signals are placed in tmp->f.data, tmp->f.datalen
* and tmp->f.samples are calculated.
*
* Side effects:
* None.
*/
static struct ast_frame *alawtolin_frameout(struct ast_translator_pvt *pvt)
/*! \brief convert and store input samples in output buffer */
static int lintoalaw_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
{
struct alaw_decoder_pvt *tmp = (struct alaw_decoder_pvt *)pvt;
if (!tmp->tail)
return NULL;
tmp->f.frametype = AST_FRAME_VOICE;
tmp->f.subclass = AST_FORMAT_SLINEAR;
tmp->f.datalen = tmp->tail * 2;
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;
}
/*!
* \brief LinToalaw_FrameIn
* Fill an input buffer with 16-bit signed linear PCM values.
*
* Results:
* None.
*
* Side effects:
* tmp->tail is number of signal values in the input buffer.
*/
static int lintoalaw_framein(struct ast_translator_pvt *pvt, struct ast_frame *f)
{
struct alaw_encoder_pvt *tmp = (struct alaw_encoder_pvt *)pvt;
int x;
short *s;
if (tmp->tail + f->datalen / 2 >= sizeof(tmp->outbuf)) {
ast_log(LOG_WARNING, "Out of buffer space\n");
return -1;
}
s = f->data;
for (x=0;x<f->datalen/2;x++)
tmp->outbuf[x+tmp->tail] = AST_LIN2A(s[x]);
tmp->tail += f->datalen/2;
char *dst = pvt->outbuf + pvt->samples;
int16_t *src = f->data;
for ( x = 0; x < f->samples; x++)
*dst++ = AST_LIN2A(src[x]);
pvt->samples += f->samples;
pvt->datalen += f->samples; /* 1 byte/sample */
return 0;
}
/*!
* \brief 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.
*/
static struct ast_frame *lintoalaw_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;
}
/*!
* \brief alawToLin_Sample
*/
/*! \brief alawToLin_Sample */
static struct ast_frame *alawtolin_sample(void)
{
static struct ast_frame f;
@@ -284,17 +94,13 @@ static struct ast_frame *alawtolin_sample(void)
return &f;
}
/*!
* \brief LinToalaw_Sample
*/
/*! \brief LinToalaw_Sample */
static struct ast_frame *lintoalaw_sample(void)
{
static struct ast_frame f;
f.frametype = AST_FRAME_VOICE;
f.subclass = AST_FORMAT_SLINEAR;
f.datalen = sizeof(slin_ulaw_ex);
/* Assume 8000 Hz */
f.samples = sizeof(slin_ulaw_ex) / 2;
f.mallocd = 0;
f.offset = 0;
@@ -303,76 +109,49 @@ static struct ast_frame *lintoalaw_sample(void)
return &f;
}
/*!
* \brief 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();
}
/*!
* \brief The complete translator for alawToLin.
*/
static struct ast_module_lock me = { .usecnt = -1 };
static struct ast_translator alawtolin = {
"alawtolin",
AST_FORMAT_ALAW,
AST_FORMAT_SLINEAR,
alawtolin_new,
alawtolin_framein,
alawtolin_frameout,
alaw_destroy,
/* NULL */
alawtolin_sample
.name = "alawtolin",
.srcfmt = AST_FORMAT_ALAW,
.dstfmt = AST_FORMAT_SLINEAR,
.framein = alawtolin_framein,
.sample = alawtolin_sample,
.buffer_samples = BUFFER_SAMPLES,
.buf_size = BUFFER_SAMPLES * 2,
.plc_samples = 160,
.lockp = &me,
};
/*!
* \brief The complete translator for LinToalaw.
*/
static struct ast_translator lintoalaw = {
"lintoalaw",
AST_FORMAT_SLINEAR,
AST_FORMAT_ALAW,
lintoalaw_new,
lintoalaw_framein,
lintoalaw_frameout,
alaw_destroy,
/* NULL */
lintoalaw_sample
.srcfmt = AST_FORMAT_SLINEAR,
.dstfmt = AST_FORMAT_ALAW,
.framein = lintoalaw_framein,
.sample = lintoalaw_sample,
.buffer_samples = BUFFER_SAMPLES,
.buf_size = BUFFER_SAMPLES,
.lockp = &me,
};
static void parse_config(void)
{
struct ast_config *cfg;
struct ast_variable *var;
if ((cfg = ast_config_load("codecs.conf"))) {
if ((var = ast_variable_browse(cfg, "plc"))) {
while (var) {
if (!strcasecmp(var->name, "genericplc")) {
useplc = ast_true(var->value) ? 1 : 0;
if (option_verbose > 2)
ast_verbose(VERBOSE_PREFIX_3 "codec_alaw: %susing generic PLC\n", useplc ? "" : "not ");
}
var = var->next;
}
struct ast_config *cfg = ast_config_load("codecs.conf");
if (!cfg)
return;
for (var = ast_variable_browse(cfg, "plc"); var; var = var->next) {
if (!strcasecmp(var->name, "genericplc")) {
alawtolin.useplc = ast_true(var->value) ? 1 : 0;
if (option_verbose > 2)
ast_verbose(VERBOSE_PREFIX_3 "codec_alaw: %susing generic PLC\n", alawtolin.useplc ? "" : "not ");
}
ast_config_destroy(cfg);
}
ast_config_destroy(cfg);
}
/*! \brief standard module stuff */
int reload(void)
{
parse_config();
@@ -382,13 +161,12 @@ int reload(void)
int unload_module(void)
{
int res;
ast_mutex_lock(&localuser_lock);
ast_mutex_lock(&me.lock);
res = ast_unregister_translator(&lintoalaw);
if (!res)
res = ast_unregister_translator(&alawtolin);
if (localusecnt)
res |= ast_unregister_translator(&alawtolin);
if (me.usecnt)
res = -1;
ast_mutex_unlock(&localuser_lock);
ast_mutex_unlock(&me.lock);
return res;
}
@@ -404,20 +182,14 @@ int load_module(void)
return res;
}
/*
* Return a description of this module.
*/
char *description(void)
{
return tdesc;
return "A-law Coder/Decoder";
}
int usecount(void)
{
int res;
OLD_STANDARD_USECOUNT(res);
return res;
return me.usecnt;
}
char *key()