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Properly delaying the pitch gain

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This commit is contained in:
Jean-Marc Valin 2018-12-14 22:29:29 -05:00
parent 6367aa8a78
commit 470a0a7e3e
1 changed files with 4 additions and 2 deletions
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6
dnn/lpcnet.c
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@ -50,6 +50,7 @@ struct LPCNetState {
float last_sig[LPC_ORDER];
float old_input[FEATURES_DELAY][FEATURE_CONV2_OUT_SIZE];
float old_lpc[FEATURES_DELAY][LPC_ORDER];
float old_gain[FEATURES_DELAY];
int frame_count;
float deemph_mem;
};
@ -153,8 +154,9 @@ void lpcnet_synthesize(LPCNetState *lpcnet, short *output, const float *features
static int start = LPC_ORDER+1;
/* FIXME: Do proper rounding once the Python code rounds properly. */
pitch = (int)floor(.1 + 50*features[36]+100);
/* FIXME: get the pitch gain from 2 frames in the past. */
pitch_gain = features[PITCH_GAIN_FEATURE];
pitch_gain = lpcnet->old_gain[FEATURES_DELAY-1];
memmove(&lpcnet->old_gain[1], &lpcnet->old_gain[0], (FEATURES_DELAY-1)*sizeof(lpcnet->old_gain[0]));
lpcnet->old_gain[0] = features[PITCH_GAIN_FEATURE];
run_frame_network(lpcnet, condition, gru_a_condition, features, pitch);
memcpy(lpc, lpcnet->old_lpc[FEATURES_DELAY-1], LPC_ORDER*sizeof(lpc[0]));
memmove(lpcnet->old_lpc[1], lpcnet->old_lpc[0], (FEATURES_DELAY-1)*LPC_ORDER*sizeof(lpc[0]));