/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */ /* ==================================================================== * Copyright (c) 1999-2004 Carnegie Mellon University. All rights * reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * This work was supported in part by funding from the Defense Advanced * Research Projects Agency and the National Science Foundation of the * United States of America, and the CMU Sphinx Speech Consortium. * * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * ==================================================================== * */ /* * ms_mgau.c -- Essentially a wrapper that wrap up gauden and * senone. It supports multi-stream. * * * ********************************************** * CMU ARPA Speech Project * * Copyright (c) 1997 Carnegie Mellon University. * ALL RIGHTS RESERVED. * ********************************************** * HISTORY * $Log$ * Revision 1.2 2006/02/22 16:56:01 arthchan2003 * Merged from SPHINX3_5_2_RCI_IRII_BRANCH: Added ms_mgau.[ch] into the trunk. It is a wrapper of ms_gauden and ms_senone * * Revision 1.1.2.4 2005/09/25 18:55:19 arthchan2003 * Added a flag to turn on and off precomputation. * * Revision 1.1.2.3 2005/08/03 18:53:44 dhdfu * Add memory deallocation functions. Also move all the initialization * of ms_mgau_model_t into ms_mgau_init (duh!), which entails removing it * from decode_anytopo and friends. * * Revision 1.1.2.2 2005/08/02 21:05:38 arthchan2003 * 1, Added dist and mgau_active as intermediate variable for computation. 2, Added ms_cont_mgau_frame_eval, which is a multi stream version of GMM computation mainly s3.0 family of tools. 3, Fixed dox-doc. * * Revision 1.1.2.1 2005/07/20 19:37:09 arthchan2003 * Added a multi-stream cont_mgau (ms_mgau) which is a wrapper of both gauden and senone. Add ms_mgau_init and model_set_mllr. This allow eliminating 600 lines of code in decode_anytopo/align/allphone. * * * */ /* Local headers. */ #include "ms_mgau.h" static ps_mgaufuncs_t ms_mgau_funcs = { "ms", ms_cont_mgau_frame_eval, /* frame_eval */ ms_mgau_mllr_transform, /* transform */ ms_mgau_free /* free */ }; ps_mgau_t * ms_mgau_init(acmod_t *acmod, logmath_t *lmath, bin_mdef_t *mdef) { /* Codebooks */ ms_mgau_model_t *msg; ps_mgau_t *mg; gauden_t *g; senone_t *s; cmd_ln_t *config; int i; config = acmod->config; msg = (ms_mgau_model_t *) ckd_calloc(1, sizeof(ms_mgau_model_t)); msg->config = config; msg->g = NULL; msg->s = NULL; g = msg->g = gauden_init(cmd_ln_str_r(config, "-mean"), cmd_ln_str_r(config, "-var"), cmd_ln_float32_r(config, "-varfloor"), lmath); /* Verify n_feat and veclen, against acmod. */ if (g->n_feat != feat_dimension1(acmod->fcb)) { E_ERROR("Number of streams does not match: %d != %d\n", g->n_feat, feat_dimension1(acmod->fcb)); goto error_out; } for (i = 0; i < g->n_feat; ++i) { if (g->featlen[i] != feat_dimension2(acmod->fcb, i)) { E_ERROR("Dimension of stream %d does not match: %d != %d\n", i, g->featlen[i], feat_dimension2(acmod->fcb, i)); goto error_out; } } s = msg->s = senone_init(msg->g, cmd_ln_str_r(config, "-mixw"), cmd_ln_str_r(config, "-senmgau"), cmd_ln_float32_r(config, "-mixwfloor"), lmath, mdef); s->aw = cmd_ln_int32_r(config, "-aw"); /* Verify senone parameters against gauden parameters */ if (s->n_feat != g->n_feat) E_FATAL("#Feature mismatch: gauden= %d, senone= %d\n", g->n_feat, s->n_feat); if (s->n_cw != g->n_density) E_FATAL("#Densities mismatch: gauden= %d, senone= %d\n", g->n_density, s->n_cw); if (s->n_gauden > g->n_mgau) E_FATAL("Senones need more codebooks (%d) than present (%d)\n", s->n_gauden, g->n_mgau); if (s->n_gauden < g->n_mgau) E_ERROR("Senones use fewer codebooks (%d) than present (%d)\n", s->n_gauden, g->n_mgau); msg->topn = cmd_ln_int32_r(config, "-topn"); E_INFO("The value of topn: %d\n", msg->topn); if (msg->topn == 0 || msg->topn > msg->g->n_density) { E_WARN ("-topn argument (%d) invalid or > #density codewords (%d); set to latter\n", msg->topn, msg->g->n_density); msg->topn = msg->g->n_density; } msg->dist = (gauden_dist_t ***) ckd_calloc_3d(g->n_mgau, g->n_feat, msg->topn, sizeof(gauden_dist_t)); msg->mgau_active = ckd_calloc(g->n_mgau, sizeof(int8)); mg = (ps_mgau_t *)msg; mg->vt = &ms_mgau_funcs; return mg; error_out: ms_mgau_free(ps_mgau_base(msg)); return NULL; } void ms_mgau_free(ps_mgau_t * mg) { ms_mgau_model_t *msg = (ms_mgau_model_t *)mg; if (msg == NULL) return; if (msg->g) gauden_free(msg->g); if (msg->s) senone_free(msg->s); if (msg->dist) ckd_free_3d((void *) msg->dist); if (msg->mgau_active) ckd_free(msg->mgau_active); ckd_free(msg); } int ms_mgau_mllr_transform(ps_mgau_t *s, ps_mllr_t *mllr) { ms_mgau_model_t *msg = (ms_mgau_model_t *)s; return gauden_mllr_transform(msg->g, mllr, msg->config); } int32 ms_cont_mgau_frame_eval(ps_mgau_t * mg, int16 *senscr, uint8 *senone_active, int32 n_senone_active, mfcc_t ** feat, int32 frame, int32 compallsen) { ms_mgau_model_t *msg = (ms_mgau_model_t *)mg; int32 gid; int32 topn; int32 best; gauden_t *g; senone_t *sen; topn = ms_mgau_topn(msg); g = ms_mgau_gauden(msg); sen = ms_mgau_senone(msg); if (compallsen) { int32 s; for (gid = 0; gid < g->n_mgau; gid++) gauden_dist(g, gid, topn, feat, msg->dist[gid]); best = (int32) 0x7fffffff; for (s = 0; s < sen->n_sen; s++) { senscr[s] = senone_eval(sen, s, msg->dist[sen->mgau[s]], topn); if (best > senscr[s]) { best = senscr[s]; } } /* Normalize senone scores */ for (s = 0; s < sen->n_sen; s++) { int32 bs = senscr[s] - best; if (bs > 32767) bs = 32767; if (bs < -32768) bs = -32768; senscr[s] = bs; } } else { int32 i, n; /* Flag all active mixture-gaussian codebooks */ for (gid = 0; gid < g->n_mgau; gid++) msg->mgau_active[gid] = 0; n = 0; for (i = 0; i < n_senone_active; i++) { /* senone_active consists of deltas. */ int32 s = senone_active[i] + n; msg->mgau_active[sen->mgau[s]] = 1; n = s; } /* Compute topn gaussian density values (for active codebooks) */ for (gid = 0; gid < g->n_mgau; gid++) { if (msg->mgau_active[gid]) gauden_dist(g, gid, topn, feat, msg->dist[gid]); } best = (int32) 0x7fffffff; n = 0; for (i = 0; i < n_senone_active; i++) { int32 s = senone_active[i] + n; senscr[s] = senone_eval(sen, s, msg->dist[sen->mgau[s]], topn); if (best > senscr[s]) { best = senscr[s]; } n = s; } /* Normalize senone scores */ n = 0; for (i = 0; i < n_senone_active; i++) { int32 s = senone_active[i] + n; int32 bs = senscr[s] - best; if (bs > 32767) bs = 32767; if (bs < -32768) bs = -32768; senscr[s] = bs; n = s; } } return 0; }