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Adding API for PLC

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Packet loss concealment based on LPCNet (work in progress)
This commit is contained in:
Jean-Marc Valin 2021-08-14 03:58:11 -04:00
parent b2b2e226c3
commit 969bd7662f
7 changed files with 206 additions and 11 deletions
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20
dnn/lpcnet_private.h
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@ -32,8 +32,11 @@ struct LPCNetState {
float old_lpc[FEATURES_DELAY][LPC_ORDER];
#endif
float sampling_logit_table[256];
float gru_a_condition[3*GRU_A_STATE_SIZE];
float gru_b_condition[3*GRU_B_STATE_SIZE];
int frame_count;
float deemph_mem;
float lpc[LPC_ORDER];
kiss99_ctx rng;
};
@ -63,6 +66,16 @@ struct LPCNetEncState{
int exc_mem;
};
#define PLC_BUF_SIZE (FEATURES_DELAY*FRAME_SIZE + TRAINING_OFFSET)
struct LPCNetPLCState {
LPCNetState lpcnet;
LPCNetEncState enc;
short pcm[PLC_BUF_SIZE+FRAME_SIZE];
int pcm_fill;
int skip_analysis;
int blend;
float features[NB_TOTAL_FEATURES];
};
extern float ceps_codebook1[];
extern float ceps_codebook2[];
@ -79,6 +92,13 @@ void compute_frame_features(LPCNetEncState *st, const float *in);
void decode_packet(float features[4][NB_TOTAL_FEATURES], float *vq_mem, const unsigned char buf[8]);
void run_frame_network(LPCNetState *lpcnet, float *gru_a_condition, float *gru_b_condition, float *lpc, const float *features);
void lpcnet_synthesize_tail_impl(LPCNetState *lpcnet, short *output, int N, int preload);
void lpcnet_synthesize_impl(LPCNetState *lpcnet, const float *features, short *output, int N, int preload);
void lpcnet_synthesize_blend_impl(LPCNetState *lpcnet, const short *pcm_in, short *output, int N);
void process_single_frame(LPCNetEncState *st, FILE *ffeat);
int lpcnet_compute_single_frame_features(LPCNetEncState *st, const short *pcm, float features[NB_TOTAL_FEATURES]);
void process_single_frame(LPCNetEncState *st, FILE *ffeat);
void run_frame_network(LPCNetState *lpcnet, float *gru_a_condition, float *gru_b_condition, float *lpc, const float *features);