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->frame_shift) {
E_ERROR
("Frame size %d (-wlen) must be greater than frame shift %d (-frate)\n",
fe->frame_size, fe->frame_shift);
fe_free(fe);
return NULL;
}
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->pre_speech + 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;
}
fe_t *
fe_init_auto_r(cmd_ln_t *config)
{
fe_t *fe;
fe = 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->frame_counter = 0;
assert (fe->frame_shift > 1);
if (fe->frame_size > (fe->fft_size)) {
E_WARN
("Number of FFT points has to be a power of 2 higher than %d\n",
(fe->frame_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);
fe_build_melfilters(fe->mel_fb);
fe_compute_melcosine(fe->mel_fb);
/* 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);
}
/*** Z.A.B. ***/
/*** Initialize the overflow buffers ***/
fe_start_utt(fe);
return fe;
}
