static void
feat_s3_cep_dcep(feat_t * fcb, mfcc_t ** mfc, mfcc_t ** feat)
{
mfcc_t *f;
mfcc_t *w, *_w;
int32 i;
assert(fcb);
assert(feat_n_stream(fcb) == 1);
assert(feat_stream_len(fcb, 0) == feat_cepsize(fcb) * 2);
assert(feat_window_size(fcb) == 2);
/* CEP */
memcpy(feat[0], mfc[0], feat_cepsize(fcb) * sizeof(mfcc_t));
/*
* DCEP: mfc[2] - mfc[-2];
*/
f = feat[0] + feat_cepsize(fcb);
w = mfc[2];
_w = mfc[-2];
for (i = 0; i < feat_cepsize(fcb); i++)
f[i] = w[i] - _w[i];
}
static int32
feat_s2mfc2feat_block_utt(feat_t * fcb, mfcc_t ** uttcep,
int32 nfr, mfcc_t *** ofeat)
{
mfcc_t **cepbuf;
int32 i, win, cepsize;
win = feat_window_size(fcb);
cepsize = feat_cepsize(fcb);
/* Copy and pad out the utterance (this requires that the
* feature computation functions always access the buffer via
* the frame pointers, which they do) */
cepbuf = (mfcc_t**) ckd_calloc(nfr + win * 2, sizeof(mfcc_t *));
memcpy(cepbuf + win, uttcep, nfr * sizeof(mfcc_t *));
/* Do normalization before we interpolate on the boundary */
feat_cmn(fcb, cepbuf + win, nfr, 1, 1);
feat_agc(fcb, cepbuf + win, nfr, 1, 1);
/* Now interpolate */
for (i = 0; i < win; ++i) {
cepbuf[i] = fcb->cepbuf[i];
memcpy(cepbuf[i], uttcep[0], cepsize * sizeof(mfcc_t));
cepbuf[nfr + win + i] = fcb->cepbuf[win + i];
memcpy(cepbuf[nfr + win + i], uttcep[nfr - 1], cepsize * sizeof(mfcc_t));
}
/* Compute as usual. */
feat_compute_utt(fcb, cepbuf, nfr + win * 2, win, ofeat);
ckd_free(cepbuf);
return nfr;
}
static int
acmod_log_mfc(acmod_t *acmod,
mfcc_t **cep, int n_frames)
{
int i, n;
int32 *ptr = (int32 *)cep[0];
n = n_frames * feat_cepsize(acmod->fcb);
/* Swap bytes. */
if (!WORDS_BIGENDIAN) {
for (i = 0; i < (n * sizeof(mfcc_t)); ++i) {
SWAP_INT32(ptr + i);
}
}
/* Write features. */
if (fwrite(cep[0], sizeof(mfcc_t), n, acmod->mfcfh) != n) {
E_ERROR_SYSTEM("Failed to write %d values to log file", n);
}
/* Swap them back. */
if (!WORDS_BIGENDIAN) {
for (i = 0; i < (n * sizeof(mfcc_t)); ++i) {
SWAP_INT32(ptr + i);
}
}
return 0;
}
static void
feat_1s_c_d_ld_dd_cep2feat(feat_t * fcb, mfcc_t ** mfc, mfcc_t ** feat)
{
mfcc_t *f;
mfcc_t *w, *_w;
mfcc_t *w1, *w_1, *_w1, *_w_1;
mfcc_t d1, d2;
int32 i;
assert(fcb);
assert(feat_n_stream(fcb) == 1);
assert(feat_stream_len(fcb, 0) == feat_cepsize(fcb) * 4);
assert(feat_window_size(fcb) == FEAT_DCEP_WIN * 2);
/* CEP */
memcpy(feat[0], mfc[0], feat_cepsize(fcb) * sizeof(mfcc_t));
/*
* DCEP: mfc[w] - mfc[-w], where w = FEAT_DCEP_WIN;
*/
f = feat[0] + feat_cepsize(fcb);
w = mfc[FEAT_DCEP_WIN];
_w = mfc[-FEAT_DCEP_WIN];
for (i = 0; i < feat_cepsize(fcb); i++)
f[i] = w[i] - _w[i];
/*
* LDCEP: mfc[w] - mfc[-w], where w = FEAT_DCEP_WIN * 2;
*/
f += feat_cepsize(fcb);
w = mfc[FEAT_DCEP_WIN * 2];
_w = mfc[-FEAT_DCEP_WIN * 2];
for (i = 0; i < feat_cepsize(fcb); i++)
f[i] = w[i] - _w[i];
/*
* D2CEP: (mfc[w+1] - mfc[-w+1]) - (mfc[w-1] - mfc[-w-1]),
* where w = FEAT_DCEP_WIN
*/
f += feat_cepsize(fcb);
w1 = mfc[FEAT_DCEP_WIN + 1];
_w1 = mfc[-FEAT_DCEP_WIN + 1];
w_1 = mfc[FEAT_DCEP_WIN - 1];
_w_1 = mfc[-FEAT_DCEP_WIN - 1];
for (i = 0; i < feat_cepsize(fcb); i++) {
d1 = w1[i] - _w1[i];
d2 = w_1[i] - _w_1[i];
f[i] = d1 - d2;
}
}
static void
feat_s3_cep(feat_t * fcb, mfcc_t ** mfc, mfcc_t ** feat)
{
assert(fcb);
assert(feat_n_stream(fcb) == 1);
assert(feat_window_size(fcb) == 0);
/* CEP */
memcpy(feat[0], mfc[0], feat_cepsize(fcb) * sizeof(mfcc_t));
}
int
acmod_feat_mismatch(acmod_t *acmod, feat_t *fcb)
{
/* Feature type needs to be the same. */
if (0 != strcmp(cmd_ln_str_r(acmod->config, "-feat"), feat_name(fcb)))
return TRUE;
/* Input vector dimension needs to be the same. */
if (cmd_ln_int32_r(acmod->config, "-ceplen") != feat_cepsize(fcb))
return TRUE;
/* FIXME: Need to check LDA and stuff too. */
return FALSE;
}
static void
feat_s3_1x39_cep2feat(feat_t * fcb, mfcc_t ** mfc, mfcc_t ** feat)
{
mfcc_t *f;
mfcc_t *w, *_w;
mfcc_t *w1, *w_1, *_w1, *_w_1;
mfcc_t d1, d2;
int32 i;
assert(fcb);
assert(feat_cepsize(fcb) == 13);
assert(feat_n_stream(fcb) == 1);
assert(feat_stream_len(fcb, 0) == 39);
assert(feat_window_size(fcb) == 3);
/* CEP; skip C0 */
memcpy(feat[0], mfc[0] + 1, (feat_cepsize(fcb) - 1) * sizeof(mfcc_t));
/*
* DCEP: mfc[2] - mfc[-2];
*/
f = feat[0] + feat_cepsize(fcb) - 1;
w = mfc[2] + 1; /* +1 to skip C0 */
_w = mfc[-2] + 1;
for (i = 0; i < feat_cepsize(fcb) - 1; i++)
f[i] = w[i] - _w[i];
/* POW: C0, DC0, D2C0 */
f += feat_cepsize(fcb) - 1;
f[0] = mfc[0][0];
f[1] = mfc[2][0] - mfc[-2][0];
d1 = mfc[3][0] - mfc[-1][0];
d2 = mfc[1][0] - mfc[-3][0];
f[2] = d1 - d2;
/* D2CEP: (mfc[3] - mfc[-1]) - (mfc[1] - mfc[-3]) */
f += 3;
w1 = mfc[3] + 1; /* Final +1 to skip C0 */
_w1 = mfc[-1] + 1;
w_1 = mfc[1] + 1;
_w_1 = mfc[-3] + 1;
for (i = 0; i < feat_cepsize(fcb) - 1; i++) {
d1 = w1[i] - _w1[i];
d2 = w_1[i] - _w_1[i];
f[i] = d1 - d2;
}
}
feat_t *
feat_init(char const *type, cmn_type_t cmn, int32 varnorm,
agc_type_t agc, int32 breport, int32 cepsize)
{
feat_t *fcb;
if (cepsize == 0)
cepsize = 13;
if (breport)
E_INFO
("Initializing feature stream to type: '%s', ceplen=%d, CMN='%s', VARNORM='%s', AGC='%s'\n",
type, cepsize, cmn_type_str[cmn], varnorm ? "yes" : "no", agc_type_str[agc]);
fcb = (feat_t *) ckd_calloc(1, sizeof(feat_t));
fcb->refcount = 1;
fcb->name = (char *) ckd_salloc(type);
if (strcmp(type, "s2_4x") == 0) {
/* Sphinx-II format 4-stream feature (Hack!! hardwired constants below) */
if (cepsize != 13) {
E_ERROR("s2_4x features require cepsize == 13\n");
ckd_free(fcb);
return 0;
}
fcb->cepsize = 13;
fcb->n_stream = 4;
fcb->stream_len = (uint32 *) ckd_calloc(4, sizeof(uint32));
fcb->stream_len[0] = 12;
fcb->stream_len[1] = 24;
fcb->stream_len[2] = 3;
fcb->stream_len[3] = 12;
fcb->out_dim = 51;
fcb->window_size = 4;
fcb->compute_feat = feat_s2_4x_cep2feat;
}
else if ((strcmp(type, "s3_1x39") == 0) || (strcmp(type, "1s_12c_12d_3p_12dd") == 0)) {
/* 1-stream cep/dcep/pow/ddcep (Hack!! hardwired constants below) */
if (cepsize != 13) {
E_ERROR("s2_4x features require cepsize == 13\n");
ckd_free(fcb);
return 0;
}
fcb->cepsize = 13;
fcb->n_stream = 1;
fcb->stream_len = (uint32 *) ckd_calloc(1, sizeof(uint32));
fcb->stream_len[0] = 39;
fcb->out_dim = 39;
fcb->window_size = 3;
fcb->compute_feat = feat_s3_1x39_cep2feat;
}
else if (strncmp(type, "1s_c_d_dd", 9) == 0) {
fcb->cepsize = cepsize;
fcb->n_stream = 1;
fcb->stream_len = (uint32 *) ckd_calloc(1, sizeof(uint32));
fcb->stream_len[0] = cepsize * 3;
fcb->out_dim = cepsize * 3;
fcb->window_size = FEAT_DCEP_WIN + 1; /* ddcep needs the extra 1 */
fcb->compute_feat = feat_1s_c_d_dd_cep2feat;
}
else if (strncmp(type, "1s_c_d_ld_dd", 12) == 0) {
fcb->cepsize = cepsize;
fcb->n_stream = 1;
fcb->stream_len = (uint32 *) ckd_calloc(1, sizeof(uint32));
fcb->stream_len[0] = cepsize * 4;
fcb->out_dim = cepsize * 4;
fcb->window_size = FEAT_DCEP_WIN * 2;
fcb->compute_feat = feat_1s_c_d_ld_dd_cep2feat;
}
else if (strncmp(type, "cep_dcep", 8) == 0 || strncmp(type, "1s_c_d", 6) == 0) {
/* 1-stream cep/dcep */
fcb->cepsize = cepsize;
fcb->n_stream = 1;
fcb->stream_len = (uint32 *) ckd_calloc(1, sizeof(uint32));
fcb->stream_len[0] = feat_cepsize(fcb) * 2;
fcb->out_dim = fcb->stream_len[0];
fcb->window_size = 2;
fcb->compute_feat = feat_s3_cep_dcep;
}
else if (strncmp(type, "cep", 3) == 0 || strncmp(type, "1s_c", 4) == 0) {
/* 1-stream cep */
fcb->cepsize = cepsize;
fcb->n_stream = 1;
fcb->stream_len = (uint32 *) ckd_calloc(1, sizeof(uint32));
fcb->stream_len[0] = feat_cepsize(fcb);
fcb->out_dim = fcb->stream_len[0];
fcb->window_size = 0;
fcb->compute_feat = feat_s3_cep;
}
else if (strncmp(type, "1s_3c", 5) == 0 || strncmp(type, "1s_4c", 5) == 0) {
/* 1-stream cep with frames concatenated, so called cepwin features */
if (strncmp(type, "1s_3c", 5) == 0)
fcb->window_size = 3;
else
fcb->window_size = 4;
fcb->cepsize = cepsize;
fcb->n_stream = 1;
fcb->stream_len = (uint32 *) ckd_calloc(1, sizeof(uint32));
fcb->stream_len[0] = feat_cepsize(fcb) * (2 * fcb->window_size + 1);
fcb->out_dim = fcb->stream_len[0];
fcb->compute_feat = feat_copy;
}
else {
int32 i, l, k;
char *strp;
char *mtype = ckd_salloc(type);
char *wd = ckd_salloc(type);
/*
* Generic definition: Format should be %d,%d,%d,...,%d (i.e.,
* comma separated list of feature stream widths; #items =
* #streams). An optional window size (frames will be
* concatenated) is also allowed, which can be specified with
* a colon after the list of feature streams.
*/
l = strlen(mtype);
k = 0;
for (i = 1; i < l - 1; i++) {
if (mtype[i] == ',') {
mtype[i] = ' ';
k++;
}
else if (mtype[i] == ':') {
mtype[i] = '\0';
fcb->window_size = atoi(mtype + i + 1);
break;
}
}
k++; /* Presumably there are (#commas+1) streams */
fcb->n_stream = k;
fcb->stream_len = (uint32 *) ckd_calloc(k, sizeof(uint32));
/* Scan individual feature stream lengths */
strp = mtype;
i = 0;
fcb->out_dim = 0;
fcb->cepsize = 0;
#ifndef POCKETSPHINX_NET
while (sscanf(strp, "%s%n", wd, &l) == 1)
#else
while (net_sscanf_word(strp, wd, &l) == 1)
#endif
{
strp += l;
if ((i >= fcb->n_stream)
||
#ifndef POCKETSPHINX_NET
(sscanf(wd, "%d", &(fcb->stream_len[i])) != 1)
#else
UInt32::TryParse(gcnew String(wd), fcb->stream_len[i])
#endif
|| (fcb->stream_len[i] <= 0))
E_FATAL("Bad feature type argument\n");
/* Input size before windowing */
fcb->cepsize += fcb->stream_len[i];
if (fcb->window_size > 0)
fcb->stream_len[i] *= (fcb->window_size * 2 + 1);
/* Output size after windowing */
fcb->out_dim += fcb->stream_len[i];
i++;
}
if (i != fcb->n_stream)
E_FATAL("Bad feature type argument\n");
if (fcb->cepsize != cepsize)
E_FATAL("Bad feature type argument\n");
/* Input is already the feature stream */
fcb->compute_feat = feat_copy;
ckd_free(mtype);
ckd_free(wd);
}
if (cmn != CMN_NONE)
fcb->cmn_struct = cmn_init(feat_cepsize(fcb));
fcb->cmn = cmn;
fcb->varnorm = varnorm;
if (agc != AGC_NONE) {
fcb->agc_struct = agc_init();
/*
* No need to check if agc is set to EMAX; agc_emax_set() changes only emax related things
* Moreover, if agc is not NONE and block mode is used, feat_agc() SILENTLY
* switches to EMAX
*/
/* HACK: hardwired initial estimates based on use of CMN (from Sphinx2) */
agc_emax_set(fcb->agc_struct, (cmn != CMN_NONE) ? 5.0 : 10.0);
}
fcb->agc = agc;
/*
* Make sure this buffer is large enough to be used in feat_s2mfc2feat_block_utt()
*/
fcb->cepbuf = (mfcc_t **) ckd_calloc_2d((LIVEBUFBLOCKSIZE < feat_window_size(fcb) * 2) ? feat_window_size(fcb) * 2 : LIVEBUFBLOCKSIZE,
feat_cepsize(fcb),
sizeof(mfcc_t));
/* This one is actually just an array of pointers to "flatten out"
* wraparounds. */
fcb->tmpcepbuf = (mfcc_t**)ckd_calloc(2 * feat_window_size(fcb) + 1,
sizeof(*fcb->tmpcepbuf));
return fcb;
}
static void
feat_s2_4x_cep2feat(feat_t * fcb, mfcc_t ** mfc, mfcc_t ** feat)
{
mfcc_t *f;
mfcc_t *w, *_w;
mfcc_t *w1, *w_1, *_w1, *_w_1;
mfcc_t d1, d2;
int32 i, j;
assert(fcb);
assert(feat_cepsize(fcb) == 13);
assert(feat_n_stream(fcb) == 4);
assert(feat_stream_len(fcb, 0) == 12);
assert(feat_stream_len(fcb, 1) == 24);
assert(feat_stream_len(fcb, 2) == 3);
assert(feat_stream_len(fcb, 3) == 12);
assert(feat_window_size(fcb) == 4);
/* CEP; skip C0 */
memcpy(feat[0], mfc[0] + 1, (feat_cepsize(fcb) - 1) * sizeof(mfcc_t));
/*
* DCEP(SHORT): mfc[2] - mfc[-2]
* DCEP(LONG): mfc[4] - mfc[-4]
*/
w = mfc[2] + 1; /* +1 to skip C0 */
_w = mfc[-2] + 1;
f = feat[1];
for (i = 0; i < feat_cepsize(fcb) - 1; i++) /* Short-term */
f[i] = w[i] - _w[i];
w = mfc[4] + 1; /* +1 to skip C0 */
_w = mfc[-4] + 1;
for (j = 0; j < feat_cepsize(fcb) - 1; i++, j++) /* Long-term */
f[i] = w[j] - _w[j];
/* D2CEP: (mfc[3] - mfc[-1]) - (mfc[1] - mfc[-3]) */
w1 = mfc[3] + 1; /* Final +1 to skip C0 */
_w1 = mfc[-1] + 1;
w_1 = mfc[1] + 1;
_w_1 = mfc[-3] + 1;
f = feat[3];
for (i = 0; i < feat_cepsize(fcb) - 1; i++) {
d1 = w1[i] - _w1[i];
d2 = w_1[i] - _w_1[i];
f[i] = d1 - d2;
}
/* POW: C0, DC0, D2C0; differences computed as above for rest of cep */
f = feat[2];
f[0] = mfc[0][0];
f[1] = mfc[2][0] - mfc[-2][0];
d1 = mfc[3][0] - mfc[-1][0];
d2 = mfc[1][0] - mfc[-3][0];
f[2] = d1 - d2;
}
int32
feat_s2mfc2feat_live(feat_t * fcb, mfcc_t ** uttcep, int32 *inout_ncep,
int32 beginutt, int32 endutt, mfcc_t *** ofeat)
{
int32 win, cepsize, nbufcep;
int32 i, j, nfeatvec;
int32 zero = 0;
/* Avoid having to check this everywhere. */
if (inout_ncep == 0) inout_ncep = &zero;
/* Special case for entire utterances. */
if (beginutt && endutt && *inout_ncep > 0)
return feat_s2mfc2feat_block_utt(fcb, uttcep, *inout_ncep, ofeat);
win = feat_window_size(fcb);
cepsize = feat_cepsize(fcb);
/* Empty the input buffer on start of utterance. */
if (beginutt)
fcb->bufpos = fcb->curpos;
/* Calculate how much data is in the buffer already. */
nbufcep = fcb->bufpos - fcb->curpos;
if (nbufcep < 0)
nbufcep = fcb->bufpos + LIVEBUFBLOCKSIZE - fcb->curpos;
/* Add any data that we have to replicate. */
if (beginutt && *inout_ncep > 0)
nbufcep += win;
if (endutt)
nbufcep += win;
/* Only consume as much input as will fit in the buffer. */
if (nbufcep + *inout_ncep > LIVEBUFBLOCKSIZE) {
/* We also can't overwrite the trailing window, hence the
* reason why win is subtracted here. */
*inout_ncep = LIVEBUFBLOCKSIZE - nbufcep - win;
/* Cancel end of utterance processing. */
endutt = FALSE;
}
/* FIXME: Don't modify the input! */
feat_cmn(fcb, uttcep, *inout_ncep, beginutt, endutt);
feat_agc(fcb, uttcep, *inout_ncep, beginutt, endutt);
/* Replicate first frame into the first win frames if we're at the
* beginning of the utterance and there was some actual input to
* deal with. (FIXME: Not entirely sure why that condition) */
if (beginutt && *inout_ncep > 0) {
for (i = 0; i < win; i++) {
memcpy(fcb->cepbuf[fcb->bufpos++], uttcep[0],
cepsize * sizeof(mfcc_t));
fcb->bufpos %= LIVEBUFBLOCKSIZE;
}
/* Move the current pointer past this data. */
fcb->curpos = fcb->bufpos;
nbufcep -= win;
}
/* Copy in frame data to the circular buffer. */
for (i = 0; i < *inout_ncep; ++i) {
memcpy(fcb->cepbuf[fcb->bufpos++], uttcep[i],
cepsize * sizeof(mfcc_t));
fcb->bufpos %= LIVEBUFBLOCKSIZE;
++nbufcep;
}
/* Replicate last frame into the last win frames if we're at the
* end of the utterance (even if there was no input, so we can
* flush the output). */
if (endutt) {
int32 tpos; /* Index of last input frame. */
if (fcb->bufpos == 0)
tpos = LIVEBUFBLOCKSIZE - 1;
else
tpos = fcb->bufpos - 1;
for (i = 0; i < win; ++i) {
memcpy(fcb->cepbuf[fcb->bufpos++], fcb->cepbuf[tpos],
cepsize * sizeof(mfcc_t));
fcb->bufpos %= LIVEBUFBLOCKSIZE;
}
}
/* We have to leave the trailing window of frames. */
nfeatvec = nbufcep - win;
if (nfeatvec <= 0)
return 0; /* Do nothing. */
for (i = 0; i < nfeatvec; ++i) {
/* Handle wraparound cases. */
if (fcb->curpos - win < 0 || fcb->curpos + win >= LIVEBUFBLOCKSIZE) {
/* Use tmpcepbuf for this case. Actually, we just need the pointers. */
for (j = -win; j <= win; ++j) {
int32 tmppos =
(fcb->curpos + j + LIVEBUFBLOCKSIZE) % LIVEBUFBLOCKSIZE;
fcb->tmpcepbuf[win + j] = fcb->cepbuf[tmppos];
}
fcb->compute_feat(fcb, fcb->tmpcepbuf + win, ofeat[i]);
}
else {
fcb->compute_feat(fcb, fcb->cepbuf + fcb->curpos, ofeat[i]);
}
/* Move the read pointer forward. */
++fcb->curpos;
fcb->curpos %= LIVEBUFBLOCKSIZE;
}
if (fcb->lda)
feat_lda_transform(fcb, ofeat, nfeatvec);
if (fcb->subvecs)
feat_subvec_project(fcb, ofeat, nfeatvec);
return nfeatvec;
}
main (int32 argc, char *argv[])
{
char *str;
#if 0
ckd_debug(100000);
#endif
E_INFO("%s COMPILED ON: %s, AT: %s\n\n", argv[0], __DATE__, __TIME__);
/* Digest command line argument definitions */
cmd_ln_define (defn);
if ((argc == 2) && (strcmp (argv[1], "help") == 0)) {
cmd_ln_print_definitions();
exit(1);
}
/* Look for default or specified arguments file */
str = NULL;
if ((argc == 2) && (argv[1][0] != '-'))
str = argv[1];
else if (argc == 1) {
str = "s3align.arg";
E_INFO("Looking for default argument file: %s\n", str);
}
if (str) {
/* Build command line argument list from file */
if ((argc = load_argfile (str, argv[0], &argv)) < 0) {
fprintf (stderr, "Usage:\n");
fprintf (stderr, "\t%s argument-list, or\n", argv[0]);
fprintf (stderr, "\t%s [argument-file] (default file: s3align.arg)\n\n",
argv[0]);
cmd_ln_print_definitions();
exit(1);
}
}
cmdline_parse (argc, argv);
if ((cmd_ln_access("-mdeffn") == NULL) ||
(cmd_ln_access("-meanfn") == NULL) ||
(cmd_ln_access("-varfn") == NULL) ||
(cmd_ln_access("-mixwfn") == NULL) ||
(cmd_ln_access("-tmatfn") == NULL) ||
(cmd_ln_access("-dictfn") == NULL))
E_FATAL("Missing -mdeffn, -meanfn, -varfn, -mixwfn, -tmatfn, or -dictfn argument\n");
if ((cmd_ln_access("-ctlfn") == NULL) || (cmd_ln_access("-insentfn") == NULL))
E_FATAL("Missing -ctlfn or -insentfn argument\n");
if ((cmd_ln_access ("-s2stsegdir") == NULL) &&
(cmd_ln_access ("-stsegdir") == NULL) &&
(cmd_ln_access ("-phsegdir") == NULL) &&
(cmd_ln_access ("-wdsegdir") == NULL) &&
(cmd_ln_access ("-outsentfn") == NULL))
E_FATAL("Missing output file/directory argument(s)\n");
tm_utt = timing_new ();
/*
* Initialize log(S3-base). All scores (probs...) computed in log domain to avoid
* underflow. At the same time, log base = 1.0001 (1+epsilon) to allow log values
* to be maintained in int32 variables without significant loss of precision.
*/
if (cmd_ln_access("-logbase") == NULL)
logs3_init (1.0001);
else {
float32 logbase;
logbase = *((float32 *) cmd_ln_access("-logbase"));
if (logbase <= 1.0)
E_FATAL("Illegal log-base: %e; must be > 1.0\n", logbase);
if (logbase > 1.1)
E_WARN("Logbase %e perhaps too large??\n", logbase);
logs3_init ((float64) logbase);
}
/* Initialize feature stream type */
feat_init ((char *) cmd_ln_access ("-feat"));
/* BHIKSHA: PASS CEPSIZE TO FEAT_CEPSIZE, 6 Jan 98 */
cepsize = *((int32 *) cmd_ln_access("-ceplen"));
cepsize = feat_cepsize (cepsize);
/* END CHANGES BY BHIKSHA */
/* Read in input databases */
models_init ();
senscale = (int32 *) ckd_calloc (S3_MAX_FRAMES, sizeof(int32));
tmr_utt = cyctimer_new ("U");
tmr_gauden = cyctimer_new ("G");
tmr_senone = cyctimer_new ("S");
tmr_align = cyctimer_new ("A");
/* Initialize align module */
align_init ();
printf ("\n");
tot_nfr = 0;
process_ctlfile ();
if (tot_nfr > 0) {
printf ("\n");
printf("TOTAL FRAMES: %8d\n", tot_nfr);
printf("TOTAL CPU TIME: %11.2f sec, %7.2f xRT\n",
tm_utt->t_tot_cpu, tm_utt->t_tot_cpu/(tot_nfr*0.01));
printf("TOTAL ELAPSED TIME: %11.2f sec, %7.2f xRT\n",
tm_utt->t_tot_elapsed, tm_utt->t_tot_elapsed/(tot_nfr*0.01));
}
#if (! WIN32)
system ("ps aguxwww | grep s3align");
#endif
/* Hack!! To avoid hanging problem under Linux */
if (logfp) {
fclose (logfp);
*stdout = orig_stdout;
*stderr = orig_stderr;
}
exit(0);
}
acoustic_t *acoustic_init (feat_t *f, gauden_t *g, senone_t *s,
float64 beam,
int32 maxfr)
{
acoustic_t *am;
int32 i;
if (senone_n_mgau(s) != gauden_n_mgau(g)) {
E_ERROR("#Parent mixture Gaussians mismatch: senone(%d), gauden(%d)\n",
senone_n_mgau(s), gauden_n_mgau(g));
}
if (feat_n_stream(f) != senone_n_stream(s)) {
E_ERROR("#Feature-streams mismatch: feat(%d), senone(%d)\n",
feat_n_stream(f), senone_n_stream(s));
}
if (feat_n_stream(f) != gauden_n_stream(g)) {
E_ERROR("#Feature-streams mismatch: feat(%d), gauden(%d)\n",
feat_n_stream(f), gauden_n_stream(g));
return NULL;
}
for (i = 0; i < feat_n_stream(f); i++) {
if (feat_stream_len(f, i) != gauden_stream_len(g, i)) {
E_ERROR("Feature stream(%d) length mismatch: feat(%d), gauden(%d)\n",
feat_stream_len(f, i), gauden_stream_len(g, i));
return NULL;
}
}
if (beam > 1.0) {
E_ERROR("mgaubeam > 1.0 (%e)\n", beam);
return NULL;
}
am = (acoustic_t *) ckd_calloc (1, sizeof(acoustic_t));
am->fcb = f;
am->gau = g;
am->sen = s;
am->mgaubeam = (beam == 0.0) ? LOGPROB_ZERO : logs3(beam);
if (am->mgaubeam > 0)
am->mgaubeam = 0;
am->tot_mgau_eval = 0;
am->tot_dist_valid = 0.0;
am->dist_valid = (am->mgaubeam <= LOGPROB_ZERO) ? NULL :
(int32 *) ckd_calloc (g->max_n_mean, sizeof(int32));
if (f->compute_feat) {
/* Input is MFC cepstra; feature vectors computed from that */
am->mfc = (float32 **) ckd_calloc_2d (maxfr, feat_cepsize(am->fcb),
sizeof(float32));
am->feat = feat_array_alloc (f, 1);
} else {
/* Input is directly feature vectors */
am->mfc = NULL;
am->feat = feat_array_alloc (f, maxfr);
}
am->dist = (int32 *) ckd_calloc (g->max_n_mean, sizeof(int32));
am->gauden_active = bitvec_alloc (g->n_mgau);
am->senscr = (int32 *) ckd_calloc (s->n_sen, sizeof(int32));
am->senscale = (int32 *) ckd_calloc (maxfr, sizeof(int32));
am->sen_active = bitvec_alloc (s->n_sen);
return am;
}
static void decode_utt (void *data, char *uttfile, int32 sf, int32 ef, char *uttid)
{
kb_t *kb;
acoustic_t *am;
int32 featwin, nfr, min_utt_frames, n_vithist;
char cepfile[4096], latfile[4096];
vithist_t *finalhist;
int32 i, f;
glist_t hyplist;
FILE *latfp;
printf ("\n");
fflush (stdout);
E_INFO("Utterance %s\n", uttid);
kb = (kb_t *)data;
am = kb->am;
featwin = feat_window_size(am->fcb);
/* Build complete cepfile name and read cepstrum data; check for min length */
ctl_infile (cepfile, cmd_ln_str("-cepdir"), cmd_ln_str("-cepext"), uttfile);
if ((nfr = s2mfc_read (cepfile, sf, ef, featwin, am->mfc, S3_MAX_FRAMES)) < 0) {
E_ERROR("%s: MFC read failed\n", uttid);
return;
}
E_INFO("%s: %d frames\n", uttid, nfr-(featwin<<1));
ptmr_reset (kb->tm);
ptmr_reset (kb->tm_search);
ptmr_start (kb->tm);
min_utt_frames = (featwin<<1) + 1;
if (nfr < min_utt_frames) {
E_ERROR("%s: Utterance shorter than %d frames; ignored\n",
uttid, min_utt_frames, nfr);
return;
}
/* CMN/AGC */
if (strcmp (cmd_ln_str("-cmn"), "current") == 0)
cmn (am->mfc, nfr, feat_cepsize(am->fcb));
if (strcmp (cmd_ln_str("-agc"), "max") == 0)
agc_max (am->mfc, nfr);
/* Process utterance */
lextree_vit_start (kb, uttid);
for (i = featwin, f = 0; i < nfr-featwin; i++, f++) {
am->senscale[f] = acoustic_eval (am, i);
ptmr_start (kb->tm_search);
lextree_vit_frame (kb, f, uttid);
printf (" %d,%d,%d", f, glist_count (kb->vithist[f]), glist_count (kb->lextree_active));
fflush (stdout);
ptmr_stop (kb->tm_search);
}
printf ("\n");
finalhist = lextree_vit_end (kb, f, uttid);
hyplist = vithist_backtrace (finalhist, kb->am->senscale);
hyp_log (stdout, hyplist, _dict_wordstr, (void *)kb->dict);
hyp_myfree (hyplist);
printf ("\n");
/* Log the entire Viterbi word lattice */
sprintf (latfile, "%s.lat", uttid);
if ((latfp = fopen(latfile, "w")) == NULL) {
E_ERROR("fopen(%s,w) failed; using stdout\n", latfile);
latfp = stdout;
}
n_vithist = vithist_log (latfp, kb->vithist, f, _dict_wordstr, (void *)kb->dict);
if (latfp != stdout)
fclose (latfp);
else {
printf ("\n");
fflush (stdout);
}
ptmr_stop (kb->tm);
if (f > 0) {
printf("TMR(%s): %5d frames; %.1fs CPU, %.2f xRT; %.1fs CPU(search), %.2f xRT; %.1fs Elapsed, %.2f xRT\n",
uttid, f,
kb->tm->t_cpu, kb->tm->t_cpu * 100.0 / f,
kb->tm_search->t_cpu, kb->tm_search->t_cpu * 100.0 / f,
kb->tm->t_elapsed, kb->tm->t_elapsed * 100.0 / f);
printf("CTR(%s): %5d frames; %d Sen (%.1f/fr); %d HMM (%.1f/fr); %d Words (%.1f/fr)\n",
uttid, f,
kb->n_sen_eval, ((float64)kb->n_sen_eval) / f,
kb->n_hmm_eval, ((float64)kb->n_hmm_eval) / f,
n_vithist, ((float64) n_vithist) / f);
}
/* Cleanup */
glist_free (kb->lextree_active);
kb->lextree_active = NULL;
for (; f >= -1; --f) { /* I.e., including dummy START_WORD node at frame -1 */
glist_myfree (kb->vithist[f], sizeof(vithist_t));
kb->vithist[f] = NULL;
}
lm_cache_reset (kb->lm);
}