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Using KISS99 (taken from Daala) as RNG

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This commit is contained in:
Jean-Marc Valin 2021-11-10 17:58:51 -05:00
parent 81229a7412
commit 3a47548536
7 changed files with 129 additions and 6 deletions
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8
dnn/lpcnet.c
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@ -116,7 +116,7 @@ void run_frame_network(LPCNetState *lpcnet, float *gru_a_condition, float *gru_b
if (lpcnet->frame_count < 1000) lpcnet->frame_count++;
}
int run_sample_network(NNetState *net, const float *gru_a_condition, const float *gru_b_condition, int last_exc, int last_sig, int pred, const float *sampling_logit_table)
int run_sample_network(NNetState *net, const float *gru_a_condition, const float *gru_b_condition, int last_exc, int last_sig, int pred, const float *sampling_logit_table, kiss99_ctx *rng)
{
float gru_a_input[3*GRU_A_STATE_SIZE];
float in_b[GRU_A_STATE_SIZE+FEATURE_DENSE2_OUT_SIZE];
@ -134,7 +134,7 @@ int run_sample_network(NNetState *net, const float *gru_a_condition, const float
RNN_COPY(in_b, net->gru_a_state, GRU_A_STATE_SIZE);
RNN_COPY(gru_b_input, gru_b_condition, 3*GRU_B_STATE_SIZE);
compute_gruB(&gru_b, gru_b_input, net->gru_b_state, in_b);
return sample_mdense(&dual_fc, net->gru_b_state, sampling_logit_table);
return sample_mdense(&dual_fc, net->gru_b_state, sampling_logit_table, rng);
}
LPCNET_EXPORT int lpcnet_get_size()
@ -145,12 +145,14 @@ LPCNET_EXPORT int lpcnet_get_size()
LPCNET_EXPORT int lpcnet_init(LPCNetState *lpcnet)
{
int i;
const char* rng_string="LPCNet";
memset(lpcnet, 0, lpcnet_get_size());
lpcnet->last_exc = lin2ulaw(0.f);
for (i=0;i<256;i++) {
float prob = .025+.95*i/255.;
lpcnet->sampling_logit_table[i] = -log((1-prob)/prob);
}
kiss99_srand(&lpcnet->rng, (const unsigned char *)rng_string, strlen(rng_string));
return 0;
}
@ -193,7 +195,7 @@ LPCNET_EXPORT void lpcnet_synthesize(LPCNetState *lpcnet, const float *features,
for (j=0;j<LPC_ORDER;j++) pred -= lpcnet->last_sig[j]*lpc[j];
last_sig_ulaw = lin2ulaw(lpcnet->last_sig[0]);
pred_ulaw = lin2ulaw(pred);
exc = run_sample_network(&lpcnet->nnet, gru_a_condition, gru_b_condition, lpcnet->last_exc, last_sig_ulaw, pred_ulaw, lpcnet->sampling_logit_table);
exc = run_sample_network(&lpcnet->nnet, gru_a_condition, gru_b_condition, lpcnet->last_exc, last_sig_ulaw, pred_ulaw, lpcnet->sampling_logit_table, &lpcnet->rng);
pcm = pred + ulaw2lin(exc);
RNN_MOVE(&lpcnet->last_sig[1], &lpcnet->last_sig[0], LPC_ORDER-1);
lpcnet->last_sig[0] = pcm;