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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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307
codecs/codec_lpc10.c
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@@ -60,62 +60,36 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#define LPC10_BYTES_IN_COMPRESSED_FRAME (LPC10_BITS_IN_COMPRESSED_FRAME + 7)/8
AST_MUTEX_DEFINE_STATIC(localuser_lock);
static int localusecnt=0;
#define BUFFER_SAMPLES 8000
static char *tdesc = "LPC10 2.4kbps (signed linear) Voice Coder";
static int useplc = 0;
struct ast_translator_pvt {
struct lpc10_coder_pvt {
union {
struct lpc10_encoder_state *enc;
struct lpc10_decoder_state *dec;
} lpc10;
struct ast_frame f;
/* Space to build offset */
char offset[AST_FRIENDLY_OFFSET];
/* Buffer for our outgoing frame */
short outbuf[8000];
/* Enough to store a full second */
short buf[8000];
int tail;
short buf[BUFFER_SAMPLES];
int longer;
plc_state_t plc; /* god only knows why I bothered to implement PLC for LPC10 :) */
};
#define lpc10_coder_pvt ast_translator_pvt
static struct ast_translator_pvt *lpc10_enc_new(void)
static void *lpc10_enc_new(struct ast_trans_pvt *pvt)
{
struct lpc10_coder_pvt *tmp;
if ((tmp = ast_malloc(sizeof(*tmp)))) {
if (!(tmp->lpc10.enc = create_lpc10_encoder_state())) {
free(tmp);
tmp = NULL;
}
tmp->tail = 0;
tmp->longer = 0;
localusecnt++;
}
struct lpc10_coder_pvt *tmp = pvt->pvt;
if (!(tmp->lpc10.enc = create_lpc10_encoder_state()))
return NULL;
return tmp;
}
static struct ast_translator_pvt *lpc10_dec_new(void)
static void *lpc10_dec_new(struct ast_trans_pvt *pvt)
{
struct lpc10_coder_pvt *tmp;
if ((tmp = ast_malloc(sizeof(*tmp)))) {
if (!(tmp->lpc10.dec = create_lpc10_decoder_state())) {
free(tmp);
tmp = NULL;
}
tmp->tail = 0;
tmp->longer = 0;
plc_init(&tmp->plc);
localusecnt++;
}
struct lpc10_coder_pvt *tmp = pvt->pvt;
if (!(tmp->lpc10.dec = create_lpc10_decoder_state()))
return NULL;
return tmp;
}
static struct ast_frame *lintolpc10_sample(void)
{
static struct ast_frame f;
@@ -147,39 +121,6 @@ static struct ast_frame *lpc10tolin_sample(void)
return &f;
}
static struct ast_frame *lpc10tolin_frameout(struct ast_translator_pvt *tmp)
{
if (!tmp->tail)
return NULL;
/* Signed linear is no particular frame size, so just send whatever
we have in the buffer in one lump sum */
tmp->f.frametype = AST_FRAME_VOICE;
tmp->f.subclass = AST_FORMAT_SLINEAR;
tmp->f.datalen = tmp->tail * 2;
/* Assume 8000 Hz */
tmp->f.samples = tmp->tail;
tmp->f.mallocd = 0;
tmp->f.offset = AST_FRIENDLY_OFFSET;
tmp->f.src = __PRETTY_FUNCTION__;
tmp->f.data = tmp->buf;
/* Reset tail pointer */
tmp->tail = 0;
#if 0
/* Save a sample frame */
{ static int samplefr = 0;
if (samplefr == 80) {
int fd;
fd = open("lpc10.example", O_WRONLY | O_CREAT, 0644);
write(fd, tmp->f.data, tmp->f.datalen);
close(fd);
}
samplefr++;
}
#endif
return &tmp->f;
}
static void extract_bits(INT32 *bits, unsigned char *c)
{
int x;
@@ -193,6 +134,7 @@ static void extract_bits(INT32 *bits, unsigned char *c)
}
}
/* XXX note lpc10_encode() produces one bit per word in bits[] */
static void build_bits(unsigned char *c, INT32 *bits)
{
unsigned char mask=0x80;
@@ -210,48 +152,32 @@ static void build_bits(unsigned char *c, INT32 *bits)
}
}
static int lpc10tolin_framein(struct ast_translator_pvt *tmp, struct ast_frame *f)
static int lpc10tolin_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
{
/* Assuming there's space left, decode into the current buffer at
the tail location */
int x;
int len=0;
float tmpbuf[LPC10_SAMPLES_PER_FRAME];
short *sd;
INT32 bits[LPC10_BITS_IN_COMPRESSED_FRAME];
struct lpc10_coder_pvt *tmp = pvt->pvt;
int16_t *dst = (int16_t *)pvt->outbuf;
int len = 0;
if(f->datalen == 0) { /* perform PLC with nominal framesize of LPC10_SAMPLES_PER_FRAME */
if((tmp->tail + LPC10_SAMPLES_PER_FRAME) > sizeof(tmp->buf)/2) {
ast_log(LOG_WARNING, "Out of buffer space\n");
return -1;
}
if(useplc) {
plc_fillin(&tmp->plc, tmp->buf+tmp->tail, LPC10_SAMPLES_PER_FRAME);
tmp->tail += LPC10_SAMPLES_PER_FRAME;
}
return 0;
}
while(len + LPC10_BYTES_IN_COMPRESSED_FRAME <= f->datalen) {
if (tmp->tail + LPC10_SAMPLES_PER_FRAME < sizeof(tmp->buf)/2) {
sd = tmp->buf + tmp->tail;
extract_bits(bits, f->data + len);
if (lpc10_decode(bits, tmpbuf, tmp->lpc10.dec)) {
ast_log(LOG_WARNING, "Invalid lpc10 data\n");
return -1;
}
for (x=0;x<LPC10_SAMPLES_PER_FRAME;x++) {
/* Convert to a real between -1.0 and 1.0 */
sd[x] = 32768.0 * tmpbuf[x];
}
if(useplc) plc_rx(&tmp->plc, tmp->buf + tmp->tail, LPC10_SAMPLES_PER_FRAME);
tmp->tail+=LPC10_SAMPLES_PER_FRAME;
} else {
while (len + LPC10_BYTES_IN_COMPRESSED_FRAME <= f->datalen) {
int x;
float tmpbuf[LPC10_SAMPLES_PER_FRAME];
INT32 bits[LPC10_BITS_IN_COMPRESSED_FRAME]; /* XXX see note */
if (pvt->samples + LPC10_SAMPLES_PER_FRAME > BUFFER_SAMPLES) {
ast_log(LOG_WARNING, "Out of buffer space\n");
return -1;
}
extract_bits(bits, f->data + len);
if (lpc10_decode(bits, tmpbuf, tmp->lpc10.dec)) {
ast_log(LOG_WARNING, "Invalid lpc10 data\n");
return -1;
}
for (x=0;x<LPC10_SAMPLES_PER_FRAME;x++) {
/* Convert to a short between -1.0 and 1.0 */
dst[pvt->samples + x] = (int16_t)(32768.0 * tmpbuf[x]);
}
pvt->samples += LPC10_SAMPLES_PER_FRAME;
pvt->datalen += 2*LPC10_SAMPLES_PER_FRAME;
len += LPC10_BYTES_IN_COMPRESSED_FRAME;
}
if (len != f->datalen)
@@ -259,125 +185,108 @@ static int lpc10tolin_framein(struct ast_translator_pvt *tmp, struct ast_frame *
return 0;
}
static int lintolpc10_framein(struct ast_translator_pvt *tmp, struct ast_frame *f)
static int lintolpc10_framein(struct ast_trans_pvt *pvt, struct ast_frame *f)
{
struct lpc10_coder_pvt *tmp = pvt->pvt;
/* Just add the frames to our stream */
/* XXX We should look at how old the rest of our stream is, and if it
is too old, then we should overwrite it entirely, otherwise we can
get artifacts of earlier talk that do not belong */
if (tmp->tail + f->datalen < sizeof(tmp->buf) / 2) {
memcpy((tmp->buf + tmp->tail), f->data, f->datalen);
tmp->tail += f->datalen/2;
} else {
if (pvt->samples + f->samples > BUFFER_SAMPLES) {
ast_log(LOG_WARNING, "Out of buffer space\n");
return -1;
}
memcpy(tmp->buf + pvt->samples, f->data, f->datalen);
pvt->samples += f->samples;
return 0;
}
static struct ast_frame *lintolpc10_frameout(struct ast_translator_pvt *tmp)
static struct ast_frame *lintolpc10_frameout(struct ast_trans_pvt *pvt)
{
struct lpc10_coder_pvt *tmp = pvt->pvt;
int x;
int consumed = 0;
int datalen = 0; /* output frame */
int samples = 0; /* output samples */
float tmpbuf[LPC10_SAMPLES_PER_FRAME];
INT32 bits[LPC10_BITS_IN_COMPRESSED_FRAME];
INT32 bits[LPC10_BITS_IN_COMPRESSED_FRAME]; /* XXX what ??? */
/* We can't work on anything less than a frame in size */
if (tmp->tail < LPC10_SAMPLES_PER_FRAME)
if (pvt->samples < LPC10_SAMPLES_PER_FRAME)
return NULL;
/* Start with an empty frame */
tmp->f.samples = 0;
tmp->f.datalen = 0;
tmp->f.frametype = AST_FRAME_VOICE;
tmp->f.subclass = AST_FORMAT_LPC10;
while(tmp->tail >= LPC10_SAMPLES_PER_FRAME) {
if (tmp->f.datalen + LPC10_BYTES_IN_COMPRESSED_FRAME > sizeof(tmp->outbuf)) {
ast_log(LOG_WARNING, "Out of buffer space\n");
return NULL;
}
while (pvt->samples >= LPC10_SAMPLES_PER_FRAME) {
/* Encode a frame of data */
for (x=0;x<LPC10_SAMPLES_PER_FRAME;x++) {
tmpbuf[x] = (float)tmp->buf[x+consumed] / 32768.0;
}
for (x=0;x<LPC10_SAMPLES_PER_FRAME;x++)
tmpbuf[x] = (float)tmp->buf[x + samples] / 32768.0;
lpc10_encode(tmpbuf, bits, tmp->lpc10.enc);
build_bits(((unsigned char *)tmp->outbuf) + tmp->f.datalen, bits);
tmp->f.datalen += LPC10_BYTES_IN_COMPRESSED_FRAME;
tmp->f.samples += LPC10_SAMPLES_PER_FRAME;
build_bits(pvt->outbuf + datalen, bits);
datalen += LPC10_BYTES_IN_COMPRESSED_FRAME;
samples += LPC10_SAMPLES_PER_FRAME;
pvt->samples -= LPC10_SAMPLES_PER_FRAME;
/* Use one of the two left over bits to record if this is a 22 or 23 ms frame...
important for IAX use */
tmp->longer = 1 - tmp->longer;
#if 0 /* what the heck was this for? */
((char *)(tmp->f.data))[consumed - 1] |= tmp->longer;
#endif
tmp->tail -= LPC10_SAMPLES_PER_FRAME;
consumed += LPC10_SAMPLES_PER_FRAME;
}
tmp->f.mallocd = 0;
tmp->f.offset = AST_FRIENDLY_OFFSET;
tmp->f.src = __PRETTY_FUNCTION__;
tmp->f.data = tmp->outbuf;
/* Move the data at the end of the buffer to the front */
if (tmp->tail)
memmove(tmp->buf, tmp->buf + consumed, tmp->tail * 2);
#if 0
/* Save a sample frame */
{ static int samplefr = 0;
if (samplefr == 0) {
int fd;
fd = open("lpc10.example", O_WRONLY | O_CREAT, 0644);
write(fd, tmp->f.data, tmp->f.datalen);
close(fd);
}
samplefr++;
}
#endif
return &tmp->f;
if (pvt->samples)
memmove(tmp->buf, tmp->buf + samples, pvt->samples * 2);
return ast_trans_frameout(pvt, datalen, samples);
}
static void lpc10_destroy(struct ast_translator_pvt *pvt)
static void lpc10_destroy(struct ast_trans_pvt *arg)
{
struct lpc10_coder_pvt *pvt = arg->pvt;
/* Enc and DEC are both just allocated, so they can be freed */
free(pvt->lpc10.enc);
free(pvt);
localusecnt--;
}
static struct ast_translator lpc10tolin =
{ "lpc10tolin",
AST_FORMAT_LPC10, AST_FORMAT_SLINEAR,
lpc10_dec_new,
lpc10tolin_framein,
lpc10tolin_frameout,
lpc10_destroy,
lpc10tolin_sample
};
static struct ast_module_lock me = { .usecnt = -1 };
static struct ast_translator lintolpc10 =
{ "lintolpc10",
AST_FORMAT_SLINEAR, AST_FORMAT_LPC10,
lpc10_enc_new,
lintolpc10_framein,
lintolpc10_frameout,
lpc10_destroy,
lintolpc10_sample
};
static struct ast_translator lpc10tolin = {
.name = "lpc10tolin",
.srcfmt = AST_FORMAT_LPC10,
.dstfmt = AST_FORMAT_SLINEAR,
.newpvt = lpc10_dec_new,
.framein = lpc10tolin_framein,
.destroy = lpc10_destroy,
.sample = lpc10tolin_sample,
.lockp = &me,
.desc_size = sizeof(struct lpc10_coder_pvt),
.buffer_samples = BUFFER_SAMPLES,
.plc_samples = LPC10_SAMPLES_PER_FRAME,
.buf_size = BUFFER_SAMPLES * 2,
};
static struct ast_translator lintolpc10 = {
.name = "lintolpc10",
.srcfmt = AST_FORMAT_SLINEAR,
.dstfmt = AST_FORMAT_LPC10,
.newpvt = lpc10_enc_new,
.framein = lintolpc10_framein,
.frameout = lintolpc10_frameout,
.destroy = lpc10_destroy,
.sample = lintolpc10_sample,
.lockp = &me,
.desc_size = sizeof(struct lpc10_coder_pvt),
.buffer_samples = BUFFER_SAMPLES,
.buf_size = LPC10_BYTES_IN_COMPRESSED_FRAME * (1 + BUFFER_SAMPLES / LPC10_SAMPLES_PER_FRAME),
};
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_lpc10: %susing generic PLC\n", useplc ? "" : "not ");
}
var = var->next;
}
}
ast_config_destroy(cfg);
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")) {
lpc10tolin.useplc = ast_true(var->value) ? 1 : 0;
if (option_verbose > 2)
ast_verbose(VERBOSE_PREFIX_3 "codec_lpc10: %susing generic PLC\n",
lpc10tolin.useplc ? "" : "not ");
}
}
ast_config_destroy(cfg);
}
int reload(void)
@@ -390,13 +299,13 @@ int reload(void)
int unload_module(void)
{
int res;
ast_mutex_lock(&localuser_lock);
ast_mutex_lock(&me.lock);
res = ast_unregister_translator(&lintolpc10);
if (!res)
res = ast_unregister_translator(&lpc10tolin);
if (localusecnt)
if (me.usecnt)
res = -1;
ast_mutex_unlock(&localuser_lock);
ast_mutex_unlock(&me.lock);
return res;
}
@@ -414,14 +323,12 @@ int load_module(void)
char *description(void)
{
return tdesc;
return "LPC10 2.4kbps (signed linear) Voice Coder";
}
int usecount(void)
{
int res;
OLD_STANDARD_USECOUNT(res);
return res;
return me.usecnt;
}
char *key()