diff options
Diffstat (limited to 'media/sphinxbase/src/libsphinxbase/fe/fe_interface.c')
| -rw-r--r-- | media/sphinxbase/src/libsphinxbase/fe/fe_interface.c | 776 |
1 files changed, 0 insertions, 776 deletions
diff --git a/media/sphinxbase/src/libsphinxbase/fe/fe_interface.c b/media/sphinxbase/src/libsphinxbase/fe/fe_interface.c deleted file mode 100644 index cd2e1e2db..000000000 --- a/media/sphinxbase/src/libsphinxbase/fe/fe_interface.c +++ /dev/null @@ -1,776 +0,0 @@ -/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */ -/* ==================================================================== - * Copyright (c) 1996-2004 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. - * - * ==================================================================== - * - */ -#include <stdio.h> -#include <string.h> -#include <math.h> -#include <stdlib.h> -#include <assert.h> -#ifdef _WIN32_WCE -#include <windows.h> -#else -#include <time.h> -#endif - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include "sphinxbase/prim_type.h" -#include "sphinxbase/byteorder.h" -#include "sphinxbase/fixpoint.h" -#include "sphinxbase/genrand.h" -#include "sphinxbase/err.h" -#include "sphinxbase/cmd_ln.h" -#include "sphinxbase/ckd_alloc.h" - -#include "fe_internal.h" -#include "fe_warp.h" - -static const arg_t fe_args[] = { - waveform_to_cepstral_command_line_macro(), - { NULL, 0, NULL, NULL } -}; - -int -fe_parse_general_params(cmd_ln_t *config, fe_t * fe) -{ - int j, frate; - - fe->config = config; - fe->sampling_rate = cmd_ln_float32_r(config, "-samprate"); - frate = cmd_ln_int32_r(config, "-frate"); - if (frate > MAX_INT16 || frate > fe->sampling_rate || frate < 1) { - E_ERROR - ("Frame rate %d can not be bigger than sample rate %.02f\n", - frate, fe->sampling_rate); - return -1; - } - - fe->frame_rate = (int16)frate; - if (cmd_ln_boolean_r(config, "-dither")) { - fe->dither = 1; - fe->seed = cmd_ln_int32_r(config, "-seed"); - } -#ifdef WORDS_BIGENDIAN - fe->swap = strcmp("big", cmd_ln_str_r(config, "-input_endian")) == 0 ? 0 : 1; -#else - fe->swap = strcmp("little", cmd_ln_str_r(config, "-input_endian")) == 0 ? 0 : 1; -#endif - fe->window_length = cmd_ln_float32_r(config, "-wlen"); - fe->pre_emphasis_alpha = cmd_ln_float32_r(config, "-alpha"); - - fe->num_cepstra = (uint8)cmd_ln_int32_r(config, "-ncep"); - fe->fft_size = (int16)cmd_ln_int32_r(config, "-nfft"); - - /* Check FFT size, compute FFT order (log_2(n)) */ - for (j = fe->fft_size, fe->fft_order = 0; j > 1; j >>= 1, fe->fft_order++) { - if (((j % 2) != 0) || (fe->fft_size <= 0)) { - E_ERROR("fft: number of points must be a power of 2 (is %d)\n", - fe->fft_size); - return -1; - } - } - /* Verify that FFT size is greater or equal to window length. */ - if (fe->fft_size < (int)(fe->window_length * fe->sampling_rate)) { - E_ERROR("FFT: Number of points must be greater or equal to frame size (%d samples)\n", - (int)(fe->window_length * fe->sampling_rate)); - return -1; - } - - fe->prespch_len = (int16)cmd_ln_int32_r(config, "-vad_prespeech"); - fe->postspch_len = (int16)cmd_ln_int32_r(config, "-vad_postspeech"); - fe->vad_threshold = cmd_ln_float32_r(config, "-vad_threshold"); - - fe->remove_dc = cmd_ln_boolean_r(config, "-remove_dc"); - fe->remove_noise = cmd_ln_boolean_r(config, "-remove_noise"); - fe->remove_silence = cmd_ln_boolean_r(config, "-remove_silence"); - - if (0 == strcmp(cmd_ln_str_r(config, "-transform"), "dct")) - fe->transform = DCT_II; - else if (0 == strcmp(cmd_ln_str_r(config, "-transform"), "legacy")) - fe->transform = LEGACY_DCT; - else if (0 == strcmp(cmd_ln_str_r(config, "-transform"), "htk")) - fe->transform = DCT_HTK; - else { - E_ERROR("Invalid transform type (values are 'dct', 'legacy', 'htk')\n"); - return -1; - } - - if (cmd_ln_boolean_r(config, "-logspec")) - fe->log_spec = RAW_LOG_SPEC; - if (cmd_ln_boolean_r(config, "-smoothspec")) - fe->log_spec = SMOOTH_LOG_SPEC; - - return 0; -} - -static int -fe_parse_melfb_params(cmd_ln_t *config, fe_t *fe, melfb_t * mel) -{ - mel->sampling_rate = fe->sampling_rate; - mel->fft_size = fe->fft_size; - mel->num_cepstra = fe->num_cepstra; - mel->num_filters = cmd_ln_int32_r(config, "-nfilt"); - - if (fe->log_spec) - fe->feature_dimension = mel->num_filters; - else - fe->feature_dimension = fe->num_cepstra; - - mel->upper_filt_freq = cmd_ln_float32_r(config, "-upperf"); - mel->lower_filt_freq = cmd_ln_float32_r(config, "-lowerf"); - - mel->doublewide = cmd_ln_boolean_r(config, "-doublebw"); - - mel->warp_type = cmd_ln_str_r(config, "-warp_type"); - mel->warp_params = cmd_ln_str_r(config, "-warp_params"); - mel->lifter_val = cmd_ln_int32_r(config, "-lifter"); - - mel->unit_area = cmd_ln_boolean_r(config, "-unit_area"); - mel->round_filters = cmd_ln_boolean_r(config, "-round_filters"); - - if (fe_warp_set(mel, mel->warp_type) != FE_SUCCESS) { - E_ERROR("Failed to initialize the warping function.\n"); - return -1; - } - fe_warp_set_parameters(mel, mel->warp_params, mel->sampling_rate); - return 0; -} - -void -fe_print_current(fe_t const *fe) -{ - E_INFO("Current FE Parameters:\n"); - E_INFO("\tSampling Rate: %f\n", fe->sampling_rate); - E_INFO("\tFrame Size: %d\n", fe->frame_size); - E_INFO("\tFrame Shift: %d\n", fe->frame_shift); - E_INFO("\tFFT Size: %d\n", fe->fft_size); - E_INFO("\tLower Frequency: %g\n", - fe->mel_fb->lower_filt_freq); - E_INFO("\tUpper Frequency: %g\n", - fe->mel_fb->upper_filt_freq); - E_INFO("\tNumber of filters: %d\n", fe->mel_fb->num_filters); - E_INFO("\tNumber of Overflow Samps: %d\n", fe->num_overflow_samps); - E_INFO("\tStart Utt Status: %d\n", fe->start_flag); - E_INFO("Will %sremove DC offset at frame level\n", - fe->remove_dc ? "" : "not "); - if (fe->dither) { - E_INFO("Will add dither to audio\n"); - E_INFO("Dither seeded with %d\n", fe->seed); - } - else { - E_INFO("Will not add dither to audio\n"); - } - if (fe->mel_fb->lifter_val) { - E_INFO("Will apply sine-curve liftering, period %d\n", - fe->mel_fb->lifter_val); - } - E_INFO("Will %snormalize filters to unit area\n", - fe->mel_fb->unit_area ? "" : "not "); - E_INFO("Will %sround filter frequencies to DFT points\n", - fe->mel_fb->round_filters ? "" : "not "); - E_INFO("Will %suse double bandwidth in mel filter\n", - fe->mel_fb->doublewide ? "" : "not "); -} - -fe_t * -fe_init_auto() -{ - return fe_init_auto_r(cmd_ln_get()); -} - -fe_t * -fe_init_auto_r(cmd_ln_t *config) -{ - fe_t *fe; - int prespch_frame_len; - - fe = (fe_t*)ckd_calloc(1, sizeof(*fe)); - fe->refcount = 1; - - /* transfer params to front end */ - if (fe_parse_general_params(cmd_ln_retain(config), fe) < 0) { - fe_free(fe); - return NULL; - } - - /* compute remaining fe parameters */ - /* We add 0.5 so approximate the float with the closest - * integer. E.g., 2.3 is truncate to 2, whereas 3.7 becomes 4 - */ - fe->frame_shift = (int32) (fe->sampling_rate / fe->frame_rate + 0.5); - fe->frame_size = (int32) (fe->window_length * fe->sampling_rate + 0.5); - fe->prior = 0; - - fe_start_stream(fe); - - assert (fe->frame_shift > 1); - - if (fe->frame_size > (fe->fft_size)) { - E_ERROR - ("Number of FFT points has to be a power of 2 higher than %d, it is %d\n", - fe->frame_size, fe->fft_size); - fe_free(fe); - return NULL; - } - - if (fe->dither) - fe_init_dither(fe->seed); - - /* establish buffers for overflow samps and hamming window */ - fe->overflow_samps = ckd_calloc(fe->frame_size, sizeof(int16)); - fe->hamming_window = ckd_calloc(fe->frame_size/2, sizeof(window_t)); - - /* create hamming window */ - fe_create_hamming(fe->hamming_window, fe->frame_size); - - /* init and fill appropriate filter structure */ - fe->mel_fb = ckd_calloc(1, sizeof(*fe->mel_fb)); - - /* transfer params to mel fb */ - fe_parse_melfb_params(config, fe, fe->mel_fb); - - if (fe->mel_fb->upper_filt_freq > fe->sampling_rate / 2 + 1.0) { - E_ERROR("Upper frequency %.1f is higher than samprate/2 (%.1f)\n", - fe->mel_fb->upper_filt_freq, fe->sampling_rate / 2); - fe_free(fe); - return NULL; - } - - fe_build_melfilters(fe->mel_fb); - - fe_compute_melcosine(fe->mel_fb); - if (fe->remove_noise || fe->remove_silence) - fe->noise_stats = fe_init_noisestats(fe->mel_fb->num_filters); - - fe->vad_data = (vad_data_t*)ckd_calloc(1, sizeof(*fe->vad_data)); - prespch_frame_len = fe->log_spec != RAW_LOG_SPEC ? fe->num_cepstra : fe->mel_fb->num_filters; - fe->vad_data->prespch_buf = fe_prespch_init(fe->prespch_len + 1, prespch_frame_len, fe->frame_shift); - - /* Create temporary FFT, spectrum and mel-spectrum buffers. */ - /* FIXME: Gosh there are a lot of these. */ - fe->spch = ckd_calloc(fe->frame_size, sizeof(*fe->spch)); - fe->frame = ckd_calloc(fe->fft_size, sizeof(*fe->frame)); - fe->spec = ckd_calloc(fe->fft_size, sizeof(*fe->spec)); - fe->mfspec = ckd_calloc(fe->mel_fb->num_filters, sizeof(*fe->mfspec)); - - /* create twiddle factors */ - fe->ccc = ckd_calloc(fe->fft_size / 4, sizeof(*fe->ccc)); - fe->sss = ckd_calloc(fe->fft_size / 4, sizeof(*fe->sss)); - fe_create_twiddle(fe); - - if (cmd_ln_boolean_r(config, "-verbose")) { - fe_print_current(fe); - } - - /*** Initialize the overflow buffers ***/ - fe_start_utt(fe); - return fe; -} - -arg_t const * -fe_get_args(void) -{ - return fe_args; -} - -const cmd_ln_t * -fe_get_config(fe_t *fe) -{ - return fe->config; -} - -void -fe_init_dither(int32 seed) -{ - if (seed < 0) { - E_INFO("You are using the internal mechanism to generate the seed.\n"); -#ifdef _WIN32_WCE - s3_rand_seed(GetTickCount()); -#else - s3_rand_seed((long) time(0)); -#endif - } else { - E_INFO("You are using %d as the seed.\n", seed); - s3_rand_seed(seed); - } -} - -static void -fe_reset_vad_data(vad_data_t * vad_data) -{ - vad_data->global_state = 0; - vad_data->state_changed = 0; - vad_data->prespch_num = 0; - vad_data->postspch_num = 0; - fe_prespch_reset_cep(vad_data->prespch_buf); -} - -int32 -fe_start_utt(fe_t * fe) -{ - fe->num_overflow_samps = 0; - memset(fe->overflow_samps, 0, fe->frame_size * sizeof(int16)); - fe->start_flag = 1; - fe->prior = 0; - fe_reset_vad_data(fe->vad_data); - return 0; -} - -void -fe_start_stream(fe_t *fe) -{ - fe->sample_counter = 0; - fe_reset_noisestats(fe->noise_stats); -} - -int -fe_get_output_size(fe_t *fe) -{ - return (int)fe->feature_dimension; -} - -void -fe_get_input_size(fe_t *fe, int *out_frame_shift, - int *out_frame_size) -{ - if (out_frame_shift) - *out_frame_shift = fe->frame_shift; - if (out_frame_size) - *out_frame_size = fe->frame_size; -} - -uint8 -fe_get_vad_state(fe_t *fe) -{ - return fe->vad_data->global_state; -} - -int -fe_process_frames(fe_t *fe, - int16 const **inout_spch, - size_t *inout_nsamps, - mfcc_t **buf_cep, - int32 *inout_nframes, - int32 *out_frameidx) -{ - int outidx, n_overflow, orig_n_overflow; - int16 const *orig_spch; - size_t orig_nsamps; - - /* In the special case where there is no output buffer, return the - * maximum number of frames which would be generated. */ - if (buf_cep == NULL) { - if (*inout_nsamps + fe->num_overflow_samps < (size_t)fe->frame_size) - *inout_nframes = 0; - else - *inout_nframes = 1 - + ((*inout_nsamps + fe->num_overflow_samps - fe->frame_size) - / fe->frame_shift); - if (fe->vad_data->global_state) - *inout_nframes += fe_prespch_ncep(fe->vad_data->prespch_buf); - return *inout_nframes; - } - - if (out_frameidx) - *out_frameidx = 0; - - /* Are there not enough samples to make at least 1 frame? */ - if (*inout_nsamps + fe->num_overflow_samps < (size_t)fe->frame_size) { - if (*inout_nsamps > 0) { - /* Append them to the overflow buffer. */ - memcpy(fe->overflow_samps + fe->num_overflow_samps, - *inout_spch, *inout_nsamps * (sizeof(int16))); - fe->num_overflow_samps += *inout_nsamps; - /* Update input-output pointers and counters. */ - *inout_spch += *inout_nsamps; - *inout_nsamps = 0; - } - /* We produced no frames of output, sorry! */ - *inout_nframes = 0; - return 0; - } - - /* Can't write a frame? Then do nothing! */ - if (*inout_nframes < 1) { - *inout_nframes = 0; - return 0; - } - - /* Index of output frame. */ - outidx = 0; - - /* Try to read from prespeech buffer */ - if (fe->vad_data->global_state) { - while ((*inout_nframes) > 0 && fe_prespch_read_cep(fe->vad_data->prespch_buf, buf_cep[outidx]) > 0) { - outidx++; - (*inout_nframes)--; - } - if ((*inout_nframes) < 1) { - /* mfcc buffer is filled from prespeech buffer */ - *inout_nframes = outidx; - return 0; - } - - /* Sets the start frame for the returned data so that caller can update timings */ - if (out_frameidx && fe->vad_data->state_changed) { - *out_frameidx = fe->sample_counter / fe->frame_shift - fe->prespch_len; - } - } - - /* Keep track of the original start of the buffer. */ - orig_spch = *inout_spch; - orig_nsamps = *inout_nsamps; - orig_n_overflow = fe->num_overflow_samps; - - /* Start processing, taking care of any incoming overflow. */ - if (fe->num_overflow_samps) { - int offset = fe->frame_size - fe->num_overflow_samps; - - /* Append start of spch to overflow samples to make a full frame. */ - memcpy(fe->overflow_samps + fe->num_overflow_samps, - *inout_spch, offset * sizeof(**inout_spch)); - fe_read_frame(fe, fe->overflow_samps, fe->frame_size); - /* Update input-output pointers and counters. */ - *inout_spch += offset; - *inout_nsamps -= offset; - fe->num_overflow_samps -= fe->frame_shift; - } else { - fe_read_frame(fe, *inout_spch, fe->frame_size); - /* Update input-output pointers and counters. */ - *inout_spch += fe->frame_size; - *inout_nsamps -= fe->frame_size; - } - - fe_write_frame(fe, buf_cep[outidx]); - - if (!fe->vad_data->state_changed && fe->vad_data->global_state) { - outidx++; - (*inout_nframes)--; - } - if (fe->vad_data->state_changed && fe->vad_data->global_state) { - /* previous frame triggered vad into speech state - * dumping prespeech buffer */ - while ((*inout_nframes) > 0 && fe_prespch_read_cep(fe->vad_data->prespch_buf, buf_cep[outidx]) > 0) { - outidx++; - (*inout_nframes)--; - } - - /* Sets the start frame for the returned data so that caller can update timings */ - if (out_frameidx) { - *out_frameidx = (fe->sample_counter + orig_nsamps - *inout_nsamps) / fe->frame_shift - fe->prespch_len; - } - } - - /* Process all remaining frames. */ - while (*inout_nframes > 0 && *inout_nsamps >= (size_t)fe->frame_shift) { - fe_shift_frame(fe, *inout_spch, fe->frame_shift); - fe_write_frame(fe, buf_cep[outidx]); - if (!fe->vad_data->state_changed && fe->vad_data->global_state) { - (*inout_nframes)--; - outidx++; - } - /* Update input-output pointers and counters. */ - *inout_spch += fe->frame_shift; - *inout_nsamps -= fe->frame_shift; - /* Amount of data behind the original input which is still needed. */ - if (fe->num_overflow_samps > 0) - fe->num_overflow_samps -= fe->frame_shift; - - if (fe->vad_data->state_changed && fe->vad_data->global_state) { - /* previous frame triggered vad into speech state */ - while (*inout_nframes > 0 && fe_prespch_read_cep(fe->vad_data->prespch_buf, buf_cep[outidx]) != 0) { - (*inout_nframes)--; - outidx++; - } - } - } - - /* How many relevant overflow samples are there left? */ - if (fe->num_overflow_samps <= 0) { - /* Maximum number of overflow samples past *inout_spch to save. */ - n_overflow = *inout_nsamps; - if (n_overflow > fe->frame_shift) - n_overflow = fe->frame_shift; - fe->num_overflow_samps = fe->frame_size - fe->frame_shift; - /* Make sure this isn't an illegal read! */ - if (fe->num_overflow_samps > *inout_spch - orig_spch) - fe->num_overflow_samps = *inout_spch - orig_spch; - fe->num_overflow_samps += n_overflow; - if (fe->num_overflow_samps > 0) { - memcpy(fe->overflow_samps, - *inout_spch - (fe->frame_size - fe->frame_shift), - fe->num_overflow_samps * sizeof(**inout_spch)); - /* Update the input pointer to cover this stuff. */ - *inout_spch += n_overflow; - *inout_nsamps -= n_overflow; - } - } else { - /* There is still some relevant data left in the overflow buffer. */ - /* Shift existing data to the beginning. */ - memmove(fe->overflow_samps, - fe->overflow_samps + orig_n_overflow - fe->num_overflow_samps, - fe->num_overflow_samps * sizeof(*fe->overflow_samps)); - /* Copy in whatever we had in the original speech buffer. */ - n_overflow = *inout_spch - orig_spch + *inout_nsamps; - if (n_overflow > fe->frame_size - fe->num_overflow_samps) - n_overflow = fe->frame_size - fe->num_overflow_samps; - memcpy(fe->overflow_samps + fe->num_overflow_samps, - orig_spch, n_overflow * sizeof(*orig_spch)); - fe->num_overflow_samps += n_overflow; - /* Advance the input pointers. */ - if (n_overflow > *inout_spch - orig_spch) { - n_overflow -= (*inout_spch - orig_spch); - *inout_spch += n_overflow; - *inout_nsamps -= n_overflow; - } - } - - /* Finally update the frame counter with the number of frames - * and global sample counter with number of samples we procesed*/ - *inout_nframes = outidx; /* FIXME: Not sure why I wrote it this way... */ - fe->sample_counter += orig_nsamps - *inout_nsamps; - return 0; -} - -int -fe_process_frames_ext(fe_t *fe, - int16 const **inout_spch, - size_t *inout_nsamps, - mfcc_t **buf_cep, - int32 *inout_nframes, - int16 **voiced_spch, - int32 *voiced_spch_nsamps, - int32 *out_frameidx) -{ - int proc_result; - - fe_prespch_extend_pcm(fe->vad_data->prespch_buf, *inout_nframes); - - fe->vad_data->store_pcm = TRUE; - proc_result = fe_process_frames(fe, inout_spch, inout_nsamps, buf_cep, inout_nframes, out_frameidx); - fe->vad_data->store_pcm = FALSE; - - if (fe->vad_data->global_state) - fe_prespch_read_pcm(fe->vad_data->prespch_buf, voiced_spch, voiced_spch_nsamps); - else - *voiced_spch_nsamps = 0; - - return proc_result; -} - -int -fe_process_utt(fe_t * fe, int16 const * spch, size_t nsamps, - mfcc_t *** cep_block, int32 * nframes) -{ - mfcc_t **cep; - int rv; - - /* Figure out how many frames we will need. */ - fe_process_frames(fe, NULL, &nsamps, NULL, nframes, NULL); - /* Create the output buffer (it has to exist, even if there are no output frames). */ - if (*nframes) - cep = (mfcc_t **)ckd_calloc_2d(*nframes, fe->feature_dimension, sizeof(**cep)); - else - cep = (mfcc_t **)ckd_calloc_2d(1, fe->feature_dimension, sizeof(**cep)); - /* Now just call fe_process_frames() with the allocated buffer. */ - rv = fe_process_frames(fe, &spch, &nsamps, cep, nframes, NULL); - *cep_block = cep; - - return rv; -} - - -int32 -fe_end_utt(fe_t * fe, mfcc_t * cepvector, int32 * nframes) -{ - /* Process any remaining data. */ - *nframes = 0; - if (fe->num_overflow_samps > 0) { - fe_read_frame(fe, fe->overflow_samps, fe->num_overflow_samps); - fe_write_frame(fe, cepvector); - if (!fe->vad_data->state_changed && fe->vad_data->global_state) - (*nframes)++; - } - - /* reset overflow buffers... */ - fe->num_overflow_samps = 0; - fe->start_flag = 0; - - return 0; -} - -fe_t * -fe_retain(fe_t *fe) -{ - ++fe->refcount; - return fe; -} - -int -fe_free(fe_t * fe) -{ - if (fe == NULL) - return 0; - if (--fe->refcount > 0) - return fe->refcount; - - /* kill FE instance - free everything... */ - if (fe->mel_fb) { - if (fe->mel_fb->mel_cosine) - fe_free_2d((void *) fe->mel_fb->mel_cosine); - ckd_free(fe->mel_fb->lifter); - ckd_free(fe->mel_fb->spec_start); - ckd_free(fe->mel_fb->filt_start); - ckd_free(fe->mel_fb->filt_width); - ckd_free(fe->mel_fb->filt_coeffs); - ckd_free(fe->mel_fb); - } - ckd_free(fe->spch); - ckd_free(fe->frame); - ckd_free(fe->ccc); - ckd_free(fe->sss); - ckd_free(fe->spec); - ckd_free(fe->mfspec); - ckd_free(fe->overflow_samps); - ckd_free(fe->hamming_window); - - if (fe->noise_stats) - fe_free_noisestats(fe->noise_stats); - - if (fe->vad_data) { - fe_prespch_free(fe->vad_data->prespch_buf); - ckd_free(fe->vad_data); - } - - cmd_ln_free_r(fe->config); - ckd_free(fe); - - return 0; -} - -/** - * Convert a block of mfcc_t to float32 (can be done in-place) - **/ -int32 -fe_mfcc_to_float(fe_t * fe, - mfcc_t ** input, float32 ** output, int32 nframes) -{ - int32 i; - -#ifndef FIXED_POINT - if ((void *) input == (void *) output) - return nframes * fe->feature_dimension; -#endif - for (i = 0; i < nframes * fe->feature_dimension; ++i) - output[0][i] = MFCC2FLOAT(input[0][i]); - - return i; -} - -/** - * Convert a block of float32 to mfcc_t (can be done in-place) - **/ -int32 -fe_float_to_mfcc(fe_t * fe, - float32 ** input, mfcc_t ** output, int32 nframes) -{ - int32 i; - -#ifndef FIXED_POINT - if ((void *) input == (void *) output) - return nframes * fe->feature_dimension; -#endif - for (i = 0; i < nframes * fe->feature_dimension; ++i) - output[0][i] = FLOAT2MFCC(input[0][i]); - - return i; -} - -int32 -fe_logspec_to_mfcc(fe_t * fe, const mfcc_t * fr_spec, mfcc_t * fr_cep) -{ -#ifdef FIXED_POINT - fe_spec2cep(fe, fr_spec, fr_cep); -#else /* ! FIXED_POINT */ - powspec_t *powspec; - int32 i; - - powspec = ckd_malloc(fe->mel_fb->num_filters * sizeof(powspec_t)); - for (i = 0; i < fe->mel_fb->num_filters; ++i) - powspec[i] = (powspec_t) fr_spec[i]; - fe_spec2cep(fe, powspec, fr_cep); - ckd_free(powspec); -#endif /* ! FIXED_POINT */ - return 0; -} - -int32 -fe_logspec_dct2(fe_t * fe, const mfcc_t * fr_spec, mfcc_t * fr_cep) -{ -#ifdef FIXED_POINT - fe_dct2(fe, fr_spec, fr_cep, 0); -#else /* ! FIXED_POINT */ - powspec_t *powspec; - int32 i; - - powspec = ckd_malloc(fe->mel_fb->num_filters * sizeof(powspec_t)); - for (i = 0; i < fe->mel_fb->num_filters; ++i) - powspec[i] = (powspec_t) fr_spec[i]; - fe_dct2(fe, powspec, fr_cep, 0); - ckd_free(powspec); -#endif /* ! FIXED_POINT */ - return 0; -} - -int32 -fe_mfcc_dct3(fe_t * fe, const mfcc_t * fr_cep, mfcc_t * fr_spec) -{ -#ifdef FIXED_POINT - fe_dct3(fe, fr_cep, fr_spec); -#else /* ! FIXED_POINT */ - powspec_t *powspec; - int32 i; - - powspec = ckd_malloc(fe->mel_fb->num_filters * sizeof(powspec_t)); - fe_dct3(fe, fr_cep, powspec); - for (i = 0; i < fe->mel_fb->num_filters; ++i) - fr_spec[i] = (mfcc_t) powspec[i]; - ckd_free(powspec); -#endif /* ! FIXED_POINT */ - return 0; -} |