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/**
* @file g711.c G.711 Audio Codec
*
* Copyright (C) 2010 - 2015 Creytiv.com
*/
#include <re.h>
#include <rem.h>
#include <baresip.h>
/**
* @defgroup g711 g711
*
* The G.711 audio codec
*/
static int pcmu_encode(struct auenc_state *aes, uint8_t *buf,
size_t *len, int fmt, const void *sampv, size_t sampc)
{
const int16_t *p = sampv;
(void)aes;
if (!buf || !len || !sampv)
return EINVAL;
if (*len < sampc)
return ENOMEM;
if (fmt != AUFMT_S16LE)
return ENOTSUP;
*len = sampc;
while (sampc--)
*buf++ = g711_pcm2ulaw(*p++);
return 0;
}
static int pcmu_decode(struct audec_state *ads, int fmt, void *sampv,
size_t *sampc, const uint8_t *buf, size_t len)
{
int16_t *p = sampv;
(void)ads;
if (!sampv || !sampc || !buf)
return EINVAL;
if (*sampc < len)
return ENOMEM;
if (fmt != AUFMT_S16LE)
return ENOTSUP;
*sampc = len;
while (len--)
*p++ = g711_ulaw2pcm(*buf++);
return 0;
}
static int pcma_encode(struct auenc_state *aes, uint8_t *buf,
size_t *len, int fmt, const void *sampv, size_t sampc)
{
const int16_t *p = sampv;
(void)aes;
if (!buf || !len || !sampv)
return EINVAL;
if (*len < sampc)
return ENOMEM;
if (fmt != AUFMT_S16LE)
return ENOTSUP;
*len = sampc;
while (sampc--)
*buf++ = g711_pcm2alaw(*p++);
return 0;
}
static int pcma_decode(struct audec_state *ads, int fmt, void *sampv,
size_t *sampc, const uint8_t *buf, size_t len)
{
int16_t *p = sampv;
(void)ads;
if (!sampv || !sampc || !buf)
return EINVAL;
if (*sampc < len)
return ENOMEM;
if (fmt != AUFMT_S16LE)
return ENOTSUP;
*sampc = len;
while (len--)
*p++ = g711_alaw2pcm(*buf++);
return 0;
}
static struct aucodec pcmu = {
LE_INIT, "0", "PCMU", 8000, 8000, 1, NULL,
NULL, pcmu_encode, NULL, pcmu_decode, NULL, NULL, NULL
};
static struct aucodec pcma = {
LE_INIT, "8", "PCMA", 8000, 8000, 1, NULL,
NULL, pcma_encode, NULL, pcma_decode, NULL, NULL, NULL
};
static int module_init(void)
{
aucodec_register(baresip_aucodecl(), &pcmu);
aucodec_register(baresip_aucodecl(), &pcma);
return 0;
}
static int module_close(void)
{
aucodec_unregister(&pcma);
aucodec_unregister(&pcmu);
return 0;
}
EXPORT_SYM const struct mod_export DECL_EXPORTS(g711) = {
"g711",
"audio codec",
module_init,
module_close,
};
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