clang-format -i applied to src unittest misc

1 files changed, 1062 insertions, 1043 deletions

diff --git a/src/c2sim.c b/src/c2sim.c
index 01ebba1..cf23d3a 100644
--- a/src/c2sim.c
+++ b/src/c2sim.c
@@ -28,1141 +28,1160 @@
 */
 
 #include <assert.h>
+#include <errno.h>
+#include <getopt.h>
+#include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <errno.h>
-#include <math.h>
 #include <unistd.h>
-#include <getopt.h>
 
+#include "bpf.h"
+#include "bpfb.h"
 #include "defines.h"
-#include "sine.h"
-#include "nlp.h"
 #include "dump.h"
+#include "interp.h"
 #include "lpc.h"
+#include "lpcnet_freq.h"
 #include "lsp.h"
-#include "quantise.h"
+#include "newamp1.h"
+#include "nlp.h"
 #include "phase.h"
 #include "postfilter.h"
-#include "interp.h"
-#include "bpf.h"
-#include "bpfb.h"
-#include "newamp1.h"
-#include "lpcnet_freq.h"
+#include "quantise.h"
 #include "sd.h"
+#include "sine.h"
 
-void synth_one_frame(int n_samp, codec2_fftr_cfg fftr_inv_cfg, short buf[], MODEL *model, float Sn_[], float Pn[], int prede, float *de_mem, float gain);
-void print_help(const struct option *long_options, int num_opts, char* argv[]);
+void synth_one_frame(int n_samp, codec2_fftr_cfg fftr_inv_cfg, short buf[],
+                     MODEL *model, float Sn_[], float Pn[], int prede,
+                     float *de_mem, float gain);
+void print_help(const struct option *long_options, int num_opts, char *argv[]);
 
-#define N_SAMP n_samp  /* quick fix for run time sample rate selection */
+#define N_SAMP n_samp /* quick fix for run time sample rate selection */
 
 /*---------------------------------------------------------------------------*\
 
-				MAIN
+                                MAIN
 
 \*---------------------------------------------------------------------------*/
 
-int main(int argc, char *argv[])
-{
-
-    int Fs = 8000;
-    int set_fs;
-
-    int lpc_model = 0, order = LPC_ORD;
-    int lsp = 0, lspd = 0, lspvq = 0;
-    int lspjmv = 0;
-    int prede = 0;
-    int   postfilt;
-    int   hand_voicing = 0, hi = 0, simlpcpf = 0, modelin=0, modelout=0;
-    int   lpcpf = 0;
-    FILE *fvoicing = 0;
-    int dec;
-    int decimate = 1;
-    int   amread, Woread, pahw;
-    int   awread;
-    int   hmread;
-    int   phase0 = 0;
-    int   scalar_quant_Wo_e = 0;
-    int   scalar_quant_Wo_e_low = 0;
-    int   vector_quant_Wo_e = 0;
-    int   dump_pitch_e = 0;
-    float gain = 1.0;
-    int   bpf_en = 0;
-    int   bpfb_en = 0;
-    FILE *fam = NULL, *fWo = NULL;
-    FILE *faw = NULL;
-    FILE *fhm = NULL;
-    FILE *fjmv = NULL;
-    FILE *flspEWov = NULL;
-    FILE *ften_ms_centre = NULL;
-    FILE *fmodelout = NULL;
-    FILE *fmodelin = NULL;
-    #ifdef DUMP
-    int   dump;
-    #endif
-    char  out_file[MAX_STR];
-    FILE *fout = NULL;	/* output speech file */
-    int   rateK = 0, newamp1vq = 0, rate_K_dec = 0, perframe=0;
-    int   bands = 0, bands_lower_en;
-    float bands_lower = -1E32;
-    int   K = 20;
-    float framelength_s = N_S;
-    int   lspEWov = 0, rateKWov = 0, first = 0;
-    FILE  *frateKWov = NULL;
-    int   ten_ms_centre = 0;
-    FILE  *fphasenn = NULL;
-    FILE  *frateK = NULL;
-    FILE  *frateKin = NULL;
-    int   rateKout, rateKin;
-    FILE *fbands = NULL;
-    int   bands_resample = 0;
-    
-    char* opt_string = "ho:";
-    struct option long_options[] = {
-        { "Fs", required_argument, &set_fs, 1 },
-        { "rateK", no_argument, &rateK, 1 },
-        { "perframe", no_argument, &perframe, 1 },
-        { "newamp1vq", no_argument, &newamp1vq, 1 },
-        { "rateKdec", required_argument, &rate_K_dec, 1 },
-        { "rateKout", required_argument, &rateKout, 1 },
-        { "rateKin", required_argument, &rateKin, 1 },
-        { "bands",required_argument, &bands, 1 },
-        { "bands_lower",required_argument, &bands_lower_en, 1 },
-        { "bands_resample", no_argument, &bands_resample, 1 },
-        { "lpc", required_argument, &lpc_model, 1 },
-        { "lsp", no_argument, &lsp, 1 },
-        { "lspd", no_argument, &lspd, 1 },
-        { "lspvq", no_argument, &lspvq, 1 },
-        { "lspjmv", no_argument, &lspjmv, 1 },
-        { "phase0", no_argument, &phase0, 1 },
-        { "postfilter", no_argument, &postfilt, 1 },
-        { "hand_voicing", required_argument, &hand_voicing, 1 },
-        { "dec", required_argument, &dec, 1 },
-        { "hi", no_argument, &hi, 1 },
-        { "simlpcpf", no_argument, &simlpcpf, 1 },
-        { "lpcpf", no_argument, &lpcpf, 1 },
-        { "prede", no_argument, &prede, 1 },
-        { "dump_pitch_e", required_argument, &dump_pitch_e, 1 },
-        { "sq_pitch_e", no_argument, &scalar_quant_Wo_e, 1 },
-        { "sq_pitch_e_low", no_argument, &scalar_quant_Wo_e_low, 1 },
-        { "vq_pitch_e", no_argument, &vector_quant_Wo_e, 1 },
-        { "rate", required_argument, NULL, 0 },
-        { "gain", required_argument, NULL, 0 },
-        { "bpf", no_argument, &bpf_en, 1 },
-        { "bpfb", no_argument, &bpfb_en, 1 },
-        { "amread", required_argument, &amread, 1 },
-        { "hmread", required_argument, &hmread, 1 },
-        { "awread", required_argument, &awread, 1 },
-        { "Woread", required_argument, &Woread, 1 },
-        { "pahw", required_argument, &pahw, 1 },
-        { "lspEWov", required_argument, &lspEWov, 1 },
-        { "rateKWov", required_argument, &rateKWov, 1 },
-        { "first", no_argument, &first, 1 },
-        { "ten_ms_centre", required_argument, &ten_ms_centre, 1 },
-        { "framelength_s", required_argument, NULL, 0 },
-        { "modelout",  required_argument, &modelout, 1 },
-        { "modelin",   required_argument, &modelin, 1 },
-        #ifdef DUMP
-        { "dump", required_argument, &dump, 1 },
-        #endif
-        { "help", no_argument, NULL, 'h' },
-        { NULL, no_argument, NULL, 0 }
-    };
-    int num_opts=sizeof(long_options)/sizeof(struct option);
-
-    /*----------------------------------------------------------------*\
-
-                     Interpret Command Line Arguments
-
-    \*----------------------------------------------------------------*/
-
-    if (argc < 2) {
-        print_help(long_options, num_opts, argv);
-    }
-
-    while(1) {
-        int option_index = 0;
-        int opt = getopt_long(argc, argv, opt_string,
-                    long_options, &option_index);
-        if (opt == -1)
-            break;
-        switch (opt) {
-         case 0:
-            if(strcmp(long_options[option_index].name, "Fs") == 0) {
-                Fs= atoi(optarg);
-                if((Fs != 8000) && (Fs != 16000)) {
-                    fprintf(stderr, "Error Fs must be 8000 or 16000\n");
-                    exit(1);
-                }
-            } else if(strcmp(long_options[option_index].name, "lpc") == 0) {
-                order = atoi(optarg);
-            #ifdef DUMP
-            } else if(strcmp(long_options[option_index].name, "dump") == 0) {
-                if (dump)
-	            dump_on(optarg);
-            #endif
-            } else if(strcmp(long_options[option_index].name, "lsp") == 0
-                  || strcmp(long_options[option_index].name, "lspd") == 0
-                  || strcmp(long_options[option_index].name, "lspvq") == 0) {
-	        assert(order == LPC_ORD);
-            } else if(strcmp(long_options[option_index].name, "rateKdec") == 0) {
-                rate_K_dec = atoi(optarg);
-                fprintf(stderr, "rate_K_dec: %d\n", rate_K_dec);
-	    } else if(strcmp(long_options[option_index].name, "rateKout") == 0) {
-                /* read model records from file or stdin */
-                if ((frateK = fopen(optarg,"wb")) == NULL) {
-	            fprintf(stderr, "Error opening output rateK file: %s: %s\n",
-		        optarg, strerror(errno));
-                    exit(1);
-                }
-                fprintf(stderr, "each record is %d bytes\n", (int)(K*sizeof(float)));
-	    } else if(strcmp(long_options[option_index].name, "rateKin") == 0) {
-                /* read model records from file or stdin */
-                if ((frateKin = fopen(optarg,"rb")) == NULL) {
-	            fprintf(stderr, "Error opening input rateK file: %s: %s\n",
-		        optarg, strerror(errno));
-                    exit(1);
-                }
-                fprintf(stderr, "each record is %d bytes\n", (int)(K*sizeof(float)));
-	    } else if(strcmp(long_options[option_index].name, "bands") == 0) {
-                /* write mel spaced band energies to file or stdout */
-                if ((fbands = fopen(optarg,"wb")) == NULL) {
-	            fprintf(stderr, "Error opening bands file: %s: %s\n",
-		        optarg, strerror(errno));
-                    exit(1);
-                }
-	    } else if(strcmp(long_options[option_index].name, "bands_lower") == 0) {
-		bands_lower = atof(optarg);
-		fprintf(stderr, "bands_lower: %f\n", bands_lower);
-            } else if(strcmp(long_options[option_index].name, "dec") == 0) {
-
-                decimate = atoi(optarg);
-	        if ((decimate != 2) && (decimate != 3) && (decimate != 4)) {
-	            fprintf(stderr, "Error in --dec, must be 2, 3, or 4\n");
-	            exit(1);
-	        }
-
-                if (!phase0) {
-                    fprintf(stderr, "needs --phase0 to resample phase when using --dec\n");
-                    exit(1);
-                }
-                if (!lpc_model) {
-                    fprintf(stderr, "needs --lpc [order] to resample amplitudes when using --dec\n");
-                    exit(1);
-                }
-
-            } else if(strcmp(long_options[option_index].name, "hand_voicing") == 0) {
-	        if ((fvoicing = fopen(optarg,"rt")) == NULL) {
-	            fprintf(stderr, "Error opening voicing file: %s: %s.\n",
-		        optarg, strerror(errno));
-                    exit(1);
-                }
-            } else if(strcmp(long_options[option_index].name, "Woread") == 0) {
-	        if ((fWo = fopen(optarg,"rb")) == NULL) {
-	            fprintf(stderr, "Error opening float Wo file: %s: %s.\n",
-		        optarg, strerror(errno));
-                    exit(1);
-                }
-            } else if(strcmp(long_options[option_index].name, "amread") == 0) {
-	        if ((fam = fopen(optarg,"rb")) == NULL) {
-	            fprintf(stderr, "Error opening float Am file: %s: %s.\n",
-		        optarg, strerror(errno));
-                    exit(1);
-                }
-            } else if(strcmp(long_options[option_index].name, "hmread") == 0) {
-	        if ((fhm = fopen(optarg,"rb")) == NULL) {
-	            fprintf(stderr, "Error opening float Hm file: %s: %s.\n",
-		        optarg, strerror(errno));
-                    exit(1);
-                }
-            } else if(strcmp(long_options[option_index].name, "awread") == 0) {
-	        if ((faw = fopen(optarg,"rb")) == NULL) {
-	            fprintf(stderr, "Error opening float Aw file: %s: %s.\n",
-                            optarg, strerror(errno));
-                    exit(1);
-                }
-	    } else if(strcmp(long_options[option_index].name, "dump_pitch_e") == 0) {
-	        if ((fjmv = fopen(optarg,"wt")) == NULL) {
-	            fprintf(stderr, "Error opening pitch & energy dump file: %s: %s.\n",
-		        optarg, strerror(errno));
-                    exit(1);
-                }
-	    } else if(strcmp(long_options[option_index].name, "gain") == 0) {
-		gain = atof(optarg);
-	    } else if(strcmp(long_options[option_index].name, "framelength_s") == 0) {
-		framelength_s = atof(optarg);
-	    } else if(strcmp(long_options[option_index].name, "pahw") == 0) {
-
-                /* set up a bunch of arguments instead of having to enter them on cmd line every time */
-
-                phase0 = postfilt = amread = hmread = Woread = 1;
-                char file_name[MAX_STR];
-                sprintf(file_name, "%s_am.out", optarg);
-                fprintf(stderr, "reading %s", file_name);
-	        if ((fam = fopen(file_name,"rb")) == NULL) {
-	            fprintf(stderr, "Error opening float Am file: %s: %s.\n",
-		        file_name, strerror(errno));
-                    exit(1);
-                }
-                sprintf(file_name, "%s_hm.out", optarg);
-                fprintf(stderr, " %s", file_name);
-	        if ((fhm = fopen(file_name,"rb")) == NULL) {
-	            fprintf(stderr, "Error opening float Hm file: %s: %s.\n",
-		        file_name, strerror(errno));
-                    exit(1);
-                }
-                sprintf(file_name, "%s_Wo.out", optarg);
-                fprintf(stderr, " %s\n", file_name);
- 	        if ((fWo = fopen(file_name,"rb")) == NULL) {
-	            fprintf(stderr, "Error opening float Wo file: %s: %s.\n",
-		        file_name, strerror(errno));
-                    exit(1);
-                }
-	    } else if(strcmp(long_options[option_index].name, "lspEWov") == 0) {
-                /* feature file for deep learning experiments */
-                lpc_model = 1; phase0 = 1;
-	        if ((flspEWov = fopen(optarg,"wb")) == NULL) {
-	            fprintf(stderr, "Error opening lspEWov float file: %s: %s\n",
-		        optarg, strerror(errno));
-                    exit(1);
-                }
-	    } else if(strcmp(long_options[option_index].name, "rateKWov") == 0) {
-                /* feature file for deep learning experiments */
-                rateK = 1; newamp1vq = 1;
-	        if ((frateKWov = fopen(optarg,"wb")) == NULL) {
-	            fprintf(stderr, "Error opening rateKWov float file: %s: %s\n",
-		        optarg, strerror(errno));
-                    exit(1);
-                }
-	    } else if(strcmp(long_options[option_index].name, "ten_ms_centre") == 0) {
-                /* dump 10ms of audio centred on analysis frame to check time alignment with
-                   16 kHz source audio */
-                ten_ms_centre = 1;
-	        if ((ften_ms_centre = fopen(optarg,"wb")) == NULL) {
-	            fprintf(stderr, "Error opening ten_ms_centre short file: %s: %s\n",
-		        optarg, strerror(errno));
-                    exit(1);
-                }
-	    } else if(strcmp(long_options[option_index].name, "modelout") == 0) {
-                /* write model records to file or stdout */
-                modelout = 1;
-                if (strcmp(optarg, "-") == 0) fmodelout = stdout;
-	        else if ((fmodelout = fopen(optarg,"wb")) == NULL) {
-	            fprintf(stderr, "Error opening modelout file: %s: %s\n",
-		        optarg, strerror(errno));
-                    exit(1);
-                }
-                fprintf(stderr, "each model record is %d bytes\n", (int)sizeof(MODEL));
-	    } else if(strcmp(long_options[option_index].name, "modelin") == 0) {
-                /* read model records from file or stdin */
-                modelin = 1;
-                if (strcmp(optarg, "-") == 0) fmodelin = stdin;
-	        else if ((fmodelin = fopen(optarg,"rb")) == NULL) {
-	            fprintf(stderr, "Error opening modelin file: %s: %s\n",
-		        optarg, strerror(errno));
-                    exit(1);
-                }
-                fprintf(stderr, "each model record is %d bytes\n", (int)sizeof(MODEL));
-            } else if(strcmp(long_options[option_index].name, "rate") == 0) {
-                if(strcmp(optarg,"3200") == 0) {
-	            lpc_model = 1;
-		    scalar_quant_Wo_e = 1;
-	            lspd = 1;
-	            phase0 = 1;
-	            postfilt = 1;
-	            decimate = 1;
-		    lpcpf = 1;
-               } else if(strcmp(optarg,"2400") == 0) {
-	            lpc_model = 1;
-		    vector_quant_Wo_e = 1;
-	            lsp = 1;
-	            phase0 = 1;
-	            postfilt = 1;
-	            decimate = 2;
-		    lpcpf = 1;
-               } else if(strcmp(optarg,"1400") == 0) {
-	            lpc_model = 1;
-		    vector_quant_Wo_e = 1;
-	            lsp = 1;
-	            phase0 = 1;
-	            postfilt = 1;
-	            decimate = 4;
- 		    lpcpf = 1;
-               } else if(strcmp(optarg,"1300") == 0) {
-	            lpc_model = 1;
-		    scalar_quant_Wo_e = 1;
-	            lsp = 1;
-	            phase0 = 1;
-	            postfilt = 1;
-	            decimate = 4;
- 		    lpcpf = 1;
-               } else if(strcmp(optarg,"1200") == 0) {
-	            lpc_model = 1;
-		    scalar_quant_Wo_e = 1;
-	            lspjmv = 1;
-	            phase0 = 1;
-	            postfilt = 1;
-	            decimate = 4;
- 		    lpcpf = 1;
-                } else {
-                    fprintf(stderr, "Error: invalid output rate (3200|2400|1400|1200) %s\n", optarg);
-                    exit(1);
-                }
-            }
-            break;
-
-         case 'h':
-             print_help(long_options, num_opts, argv);
-             break;
-
-         case 'o':
-	     if (strcmp(optarg, "-") == 0) fout = stdout;
-	     else if ((fout = fopen(optarg,"wb")) == NULL) {
-	        fprintf(stderr, "Error opening output speech file: %s: %s.\n",
-		    optarg, strerror(errno));
-	        exit(1);
-	     }
-	     strcpy(out_file,optarg);
-	     break;
-
-         default:
-            /* This will never be reached */
-            break;
+int main(int argc, char *argv[]) {
+  int Fs = 8000;
+  int set_fs;
+
+  int lpc_model = 0, order = LPC_ORD;
+  int lsp = 0, lspd = 0, lspvq = 0;
+  int lspjmv = 0;
+  int prede = 0;
+  int postfilt;
+  int hand_voicing = 0, hi = 0, simlpcpf = 0, modelin = 0, modelout = 0;
+  int lpcpf = 0;
+  FILE *fvoicing = 0;
+  int dec;
+  int decimate = 1;
+  int amread, Woread, pahw;
+  int awread;
+  int hmread;
+  int phase0 = 0;
+  int scalar_quant_Wo_e = 0;
+  int scalar_quant_Wo_e_low = 0;
+  int vector_quant_Wo_e = 0;
+  int dump_pitch_e = 0;
+  float gain = 1.0;
+  int bpf_en = 0;
+  int bpfb_en = 0;
+  FILE *fam = NULL, *fWo = NULL;
+  FILE *faw = NULL;
+  FILE *fhm = NULL;
+  FILE *fjmv = NULL;
+  FILE *flspEWov = NULL;
+  FILE *ften_ms_centre = NULL;
+  FILE *fmodelout = NULL;
+  FILE *fmodelin = NULL;
+#ifdef DUMP
+  int dump;
+#endif
+  char out_file[MAX_STR];
+  FILE *fout = NULL; /* output speech file */
+  int rateK = 0, newamp1vq = 0, rate_K_dec = 0, perframe = 0;
+  int bands = 0, bands_lower_en;
+  float bands_lower = -1E32;
+  int K = 20;
+  float framelength_s = N_S;
+  int lspEWov = 0, rateKWov = 0, first = 0;
+  FILE *frateKWov = NULL;
+  int ten_ms_centre = 0;
+  FILE *fphasenn = NULL;
+  FILE *frateK = NULL;
+  FILE *frateKin = NULL;
+  int rateKout, rateKin;
+  FILE *fbands = NULL;
+  int bands_resample = 0;
+
+  char *opt_string = "ho:";
+  struct option long_options[] = {
+      {"Fs", required_argument, &set_fs, 1},
+      {"rateK", no_argument, &rateK, 1},
+      {"perframe", no_argument, &perframe, 1},
+      {"newamp1vq", no_argument, &newamp1vq, 1},
+      {"rateKdec", required_argument, &rate_K_dec, 1},
+      {"rateKout", required_argument, &rateKout, 1},
+      {"rateKin", required_argument, &rateKin, 1},
+      {"bands", required_argument, &bands, 1},
+      {"bands_lower", required_argument, &bands_lower_en, 1},
+      {"bands_resample", no_argument, &bands_resample, 1},
+      {"lpc", required_argument, &lpc_model, 1},
+      {"lsp", no_argument, &lsp, 1},
+      {"lspd", no_argument, &lspd, 1},
+      {"lspvq", no_argument, &lspvq, 1},
+      {"lspjmv", no_argument, &lspjmv, 1},
+      {"phase0", no_argument, &phase0, 1},
+      {"postfilter", no_argument, &postfilt, 1},
+      {"hand_voicing", required_argument, &hand_voicing, 1},
+      {"dec", required_argument, &dec, 1},
+      {"hi", no_argument, &hi, 1},
+      {"simlpcpf", no_argument, &simlpcpf, 1},
+      {"lpcpf", no_argument, &lpcpf, 1},
+      {"prede", no_argument, &prede, 1},
+      {"dump_pitch_e", required_argument, &dump_pitch_e, 1},
+      {"sq_pitch_e", no_argument, &scalar_quant_Wo_e, 1},
+      {"sq_pitch_e_low", no_argument, &scalar_quant_Wo_e_low, 1},
+      {"vq_pitch_e", no_argument, &vector_quant_Wo_e, 1},
+      {"rate", required_argument, NULL, 0},
+      {"gain", required_argument, NULL, 0},
+      {"bpf", no_argument, &bpf_en, 1},
+      {"bpfb", no_argument, &bpfb_en, 1},
+      {"amread", required_argument, &amread, 1},
+      {"hmread", required_argument, &hmread, 1},
+      {"awread", required_argument, &awread, 1},
+      {"Woread", required_argument, &Woread, 1},
+      {"pahw", required_argument, &pahw, 1},
+      {"lspEWov", required_argument, &lspEWov, 1},
+      {"rateKWov", required_argument, &rateKWov, 1},
+      {"first", no_argument, &first, 1},
+      {"ten_ms_centre", required_argument, &ten_ms_centre, 1},
+      {"framelength_s", required_argument, NULL, 0},
+      {"modelout", required_argument, &modelout, 1},
+      {"modelin", required_argument, &modelin, 1},
+#ifdef DUMP
+      {"dump", required_argument, &dump, 1},
+#endif
+      {"help", no_argument, NULL, 'h'},
+      {NULL, no_argument, NULL, 0}};
+  int num_opts = sizeof(long_options) / sizeof(struct option);
+
+  /*----------------------------------------------------------------*\
+
+                   Interpret Command Line Arguments
+
+  \*----------------------------------------------------------------*/
+
+  if (argc < 2) {
+    print_help(long_options, num_opts, argv);
+  }
+
+  while (1) {
+    int option_index = 0;
+    int opt = getopt_long(argc, argv, opt_string, long_options, &option_index);
+    if (opt == -1) break;
+    switch (opt) {
+      case 0:
+        if (strcmp(long_options[option_index].name, "Fs") == 0) {
+          Fs = atoi(optarg);
+          if ((Fs != 8000) && (Fs != 16000)) {
+            fprintf(stderr, "Error Fs must be 8000 or 16000\n");
+            exit(1);
+          }
+        } else if (strcmp(long_options[option_index].name, "lpc") == 0) {
+          order = atoi(optarg);
+#ifdef DUMP
+        } else if (strcmp(long_options[option_index].name, "dump") == 0) {
+          if (dump) dump_on(optarg);
+#endif
+        } else if (strcmp(long_options[option_index].name, "lsp") == 0 ||
+                   strcmp(long_options[option_index].name, "lspd") == 0 ||
+                   strcmp(long_options[option_index].name, "lspvq") == 0) {
+          assert(order == LPC_ORD);
+        } else if (strcmp(long_options[option_index].name, "rateKdec") == 0) {
+          rate_K_dec = atoi(optarg);
+          fprintf(stderr, "rate_K_dec: %d\n", rate_K_dec);
+        } else if (strcmp(long_options[option_index].name, "rateKout") == 0) {
+          /* read model records from file or stdin */
+          if ((frateK = fopen(optarg, "wb")) == NULL) {
+            fprintf(stderr, "Error opening output rateK file: %s: %s\n", optarg,
+                    strerror(errno));
+            exit(1);
+          }
+          fprintf(stderr, "each record is %d bytes\n",
+                  (int)(K * sizeof(float)));
+        } else if (strcmp(long_options[option_index].name, "rateKin") == 0) {
+          /* read model records from file or stdin */
+          if ((frateKin = fopen(optarg, "rb")) == NULL) {
+            fprintf(stderr, "Error opening input rateK file: %s: %s\n", optarg,
+                    strerror(errno));
+            exit(1);
+          }
+          fprintf(stderr, "each record is %d bytes\n",
+                  (int)(K * sizeof(float)));
+        } else if (strcmp(long_options[option_index].name, "bands") == 0) {
+          /* write mel spaced band energies to file or stdout */
+          if ((fbands = fopen(optarg, "wb")) == NULL) {
+            fprintf(stderr, "Error opening bands file: %s: %s\n", optarg,
+                    strerror(errno));
+            exit(1);
+          }
+        } else if (strcmp(long_options[option_index].name, "bands_lower") ==
+                   0) {
+          bands_lower = atof(optarg);
+          fprintf(stderr, "bands_lower: %f\n", bands_lower);
+        } else if (strcmp(long_options[option_index].name, "dec") == 0) {
+          decimate = atoi(optarg);
+          if ((decimate != 2) && (decimate != 3) && (decimate != 4)) {
+            fprintf(stderr, "Error in --dec, must be 2, 3, or 4\n");
+            exit(1);
+          }
+
+          if (!phase0) {
+            fprintf(stderr,
+                    "needs --phase0 to resample phase when using --dec\n");
+            exit(1);
+          }
+          if (!lpc_model) {
+            fprintf(stderr,
+                    "needs --lpc [order] to resample amplitudes when using "
+                    "--dec\n");
+            exit(1);
+          }
+
+        } else if (strcmp(long_options[option_index].name, "hand_voicing") ==
+                   0) {
+          if ((fvoicing = fopen(optarg, "rt")) == NULL) {
+            fprintf(stderr, "Error opening voicing file: %s: %s.\n", optarg,
+                    strerror(errno));
+            exit(1);
+          }
+        } else if (strcmp(long_options[option_index].name, "Woread") == 0) {
+          if ((fWo = fopen(optarg, "rb")) == NULL) {
+            fprintf(stderr, "Error opening float Wo file: %s: %s.\n", optarg,
+                    strerror(errno));
+            exit(1);
+          }
+        } else if (strcmp(long_options[option_index].name, "amread") == 0) {
+          if ((fam = fopen(optarg, "rb")) == NULL) {
+            fprintf(stderr, "Error opening float Am file: %s: %s.\n", optarg,
+                    strerror(errno));
+            exit(1);
+          }
+        } else if (strcmp(long_options[option_index].name, "hmread") == 0) {
+          if ((fhm = fopen(optarg, "rb")) == NULL) {
+            fprintf(stderr, "Error opening float Hm file: %s: %s.\n", optarg,
+                    strerror(errno));
+            exit(1);
+          }
+        } else if (strcmp(long_options[option_index].name, "awread") == 0) {
+          if ((faw = fopen(optarg, "rb")) == NULL) {
+            fprintf(stderr, "Error opening float Aw file: %s: %s.\n", optarg,
+                    strerror(errno));
+            exit(1);
+          }
+        } else if (strcmp(long_options[option_index].name, "dump_pitch_e") ==
+                   0) {
+          if ((fjmv = fopen(optarg, "wt")) == NULL) {
+            fprintf(stderr, "Error opening pitch & energy dump file: %s: %s.\n",
+                    optarg, strerror(errno));
+            exit(1);
+          }
+        } else if (strcmp(long_options[option_index].name, "gain") == 0) {
+          gain = atof(optarg);
+        } else if (strcmp(long_options[option_index].name, "framelength_s") ==
+                   0) {
+          framelength_s = atof(optarg);
+        } else if (strcmp(long_options[option_index].name, "pahw") == 0) {
+          /* set up a bunch of arguments instead of having to enter them on cmd
+           * line every time */
+
+          phase0 = postfilt = amread = hmread = Woread = 1;
+          char file_name[MAX_STR];
+          sprintf(file_name, "%s_am.out", optarg);
+          fprintf(stderr, "reading %s", file_name);
+          if ((fam = fopen(file_name, "rb")) == NULL) {
+            fprintf(stderr, "Error opening float Am file: %s: %s.\n", file_name,
+                    strerror(errno));
+            exit(1);
+          }
+          sprintf(file_name, "%s_hm.out", optarg);
+          fprintf(stderr, " %s", file_name);
+          if ((fhm = fopen(file_name, "rb")) == NULL) {
+            fprintf(stderr, "Error opening float Hm file: %s: %s.\n", file_name,
+                    strerror(errno));
+            exit(1);
+          }
+          sprintf(file_name, "%s_Wo.out", optarg);
+          fprintf(stderr, " %s\n", file_name);
+          if ((fWo = fopen(file_name, "rb")) == NULL) {
+            fprintf(stderr, "Error opening float Wo file: %s: %s.\n", file_name,
+                    strerror(errno));
+            exit(1);
+          }
+        } else if (strcmp(long_options[option_index].name, "lspEWov") == 0) {
+          /* feature file for deep learning experiments */
+          lpc_model = 1;
+          phase0 = 1;
+          if ((flspEWov = fopen(optarg, "wb")) == NULL) {
+            fprintf(stderr, "Error opening lspEWov float file: %s: %s\n",
+                    optarg, strerror(errno));
+            exit(1);
+          }
+        } else if (strcmp(long_options[option_index].name, "rateKWov") == 0) {
+          /* feature file for deep learning experiments */
+          rateK = 1;
+          newamp1vq = 1;
+          if ((frateKWov = fopen(optarg, "wb")) == NULL) {
+            fprintf(stderr, "Error opening rateKWov float file: %s: %s\n",
+                    optarg, strerror(errno));
+            exit(1);
+          }
+        } else if (strcmp(long_options[option_index].name, "ten_ms_centre") ==
+                   0) {
+          /* dump 10ms of audio centred on analysis frame to check time
+             alignment with 16 kHz source audio */
+          ten_ms_centre = 1;
+          if ((ften_ms_centre = fopen(optarg, "wb")) == NULL) {
+            fprintf(stderr, "Error opening ten_ms_centre short file: %s: %s\n",
+                    optarg, strerror(errno));
+            exit(1);
+          }
+        } else if (strcmp(long_options[option_index].name, "modelout") == 0) {
+          /* write model records to file or stdout */
+          modelout = 1;
+          if (strcmp(optarg, "-") == 0)
+            fmodelout = stdout;
+          else if ((fmodelout = fopen(optarg, "wb")) == NULL) {
+            fprintf(stderr, "Error opening modelout file: %s: %s\n", optarg,
+                    strerror(errno));
+            exit(1);
+          }
+          fprintf(stderr, "each model record is %d bytes\n",
+                  (int)sizeof(MODEL));
+        } else if (strcmp(long_options[option_index].name, "modelin") == 0) {
+          /* read model records from file or stdin */
+          modelin = 1;
+          if (strcmp(optarg, "-") == 0)
+            fmodelin = stdin;
+          else if ((fmodelin = fopen(optarg, "rb")) == NULL) {
+            fprintf(stderr, "Error opening modelin file: %s: %s\n", optarg,
+                    strerror(errno));
+            exit(1);
+          }
+          fprintf(stderr, "each model record is %d bytes\n",
+                  (int)sizeof(MODEL));
+        } else if (strcmp(long_options[option_index].name, "rate") == 0) {
+          if (strcmp(optarg, "3200") == 0) {
+            lpc_model = 1;
+            scalar_quant_Wo_e = 1;
+            lspd = 1;
+            phase0 = 1;
+            postfilt = 1;
+            decimate = 1;
+            lpcpf = 1;
+          } else if (strcmp(optarg, "2400") == 0) {
+            lpc_model = 1;
+            vector_quant_Wo_e = 1;
+            lsp = 1;
+            phase0 = 1;
+            postfilt = 1;
+            decimate = 2;
+            lpcpf = 1;
+          } else if (strcmp(optarg, "1400") == 0) {
+            lpc_model = 1;
+            vector_quant_Wo_e = 1;
+            lsp = 1;
+            phase0 = 1;
+            postfilt = 1;
+            decimate = 4;
+            lpcpf = 1;
+          } else if (strcmp(optarg, "1300") == 0) {
+            lpc_model = 1;
+            scalar_quant_Wo_e = 1;
+            lsp = 1;
+            phase0 = 1;
+            postfilt = 1;
+            decimate = 4;
+            lpcpf = 1;
+          } else if (strcmp(optarg, "1200") == 0) {
+            lpc_model = 1;
+            scalar_quant_Wo_e = 1;
+            lspjmv = 1;
+            phase0 = 1;
+            postfilt = 1;
+            decimate = 4;
+            lpcpf = 1;
+          } else {
+            fprintf(stderr,
+                    "Error: invalid output rate (3200|2400|1400|1200) %s\n",
+                    optarg);
+            exit(1);
+          }
         }
-    }
+        break;
 
-    /* Input file */
+      case 'h':
+        print_help(long_options, num_opts, argv);
+        break;
+
+      case 'o':
+        if (strcmp(optarg, "-") == 0)
+          fout = stdout;
+        else if ((fout = fopen(optarg, "wb")) == NULL) {
+          fprintf(stderr, "Error opening output speech file: %s: %s.\n", optarg,
+                  strerror(errno));
+          exit(1);
+        }
+        strcpy(out_file, optarg);
+        break;
 
-    FILE *fin;		/* input speech file                     */
-    if (strcmp(argv[optind], "-")  == 0) fin = stdin;
-    else if ((fin = fopen(argv[optind],"rb")) == NULL) {
-	fprintf(stderr, "Error opening input speech file: %s: %s.\n",
-		argv[optind], strerror(errno));
-	exit(1);
+      default:
+        /* This will never be reached */
+        break;
     }
-
-    C2CONST c2const = c2const_create(Fs, framelength_s);
-    int   n_samp = c2const.n_samp;
-    int   m_pitch = c2const.m_pitch;
-
-    short buf[N_SAMP];	/* input/output buffer                   */
-    float buf_float[N_SAMP];
-    float Sn[m_pitch];	/* float input speech samples            */
-    float Sn_pre[m_pitch];	/* pre-emphasised input speech samples   */
-    COMP  Sw[FFT_ENC];	/* DFT of Sn[]                           */
-    codec2_fft_cfg  fft_fwd_cfg;
-    codec2_fftr_cfg  fftr_fwd_cfg;
-    codec2_fftr_cfg  fftr_inv_cfg;
-    float w[m_pitch];	        /* time domain hamming window            */
-    float W[FFT_ENC];	/* DFT of w[]                            */
-    MODEL model;
-    float Pn[2*N_SAMP];	/* trapezoidal synthesis window          */
-    float Sn_[2*N_SAMP];	/* synthesised speech */
-    int   i,m;		/* loop variable                         */
-    int   frames;
-    float prev_f0;
-    float pitch;
-    float snr;
-    float sum_snr;
-
-    float pre_mem = 0.0, de_mem = 0.0;
-    float ak[1+order];
-    // COMP  Sw_[FFT_ENC];
-    // COMP  Ew[FFT_ENC];
-
-    float ex_phase[MAX_AMP+1];
-
-    float bg_est = 0.0;
-
-
-    MODEL prev_model;
-    float lsps[order];
-    float e, prev_e;
-    int   lsp_indexes[order];
-    float lsps_[order];
-    float Woe_[2];
-
-    float lsps_dec[4][order], e_dec[4], weight, weight_inc, ak_dec[4][order];
-    MODEL model_dec[4], prev_model_dec;
-    float prev_lsps_dec[order], prev_e_dec;
-
-    void *nlp_states;
-    float hpf_states[2];
-    #if 0
+  }
+
+  /* Input file */
+
+  FILE *fin; /* input speech file                     */
+  if (strcmp(argv[optind], "-") == 0)
+    fin = stdin;
+  else if ((fin = fopen(argv[optind], "rb")) == NULL) {
+    fprintf(stderr, "Error opening input speech file: %s: %s.\n", argv[optind],
+            strerror(errno));
+    exit(1);
+  }
+
+  C2CONST c2const = c2const_create(Fs, framelength_s);
+  int n_samp = c2const.n_samp;
+  int m_pitch = c2const.m_pitch;
+
+  short buf[N_SAMP]; /* input/output buffer                   */
+  float buf_float[N_SAMP];
+  float Sn[m_pitch];     /* float input speech samples            */
+  float Sn_pre[m_pitch]; /* pre-emphasised input speech samples   */
+  COMP Sw[FFT_ENC];      /* DFT of Sn[]                           */
+  codec2_fft_cfg fft_fwd_cfg;
+  codec2_fftr_cfg fftr_fwd_cfg;
+  codec2_fftr_cfg fftr_inv_cfg;
+  float w[m_pitch]; /* time domain hamming window            */
+  float W[FFT_ENC]; /* DFT of w[]                            */
+  MODEL model;
+  float Pn[2 * N_SAMP];  /* trapezoidal synthesis window          */
+  float Sn_[2 * N_SAMP]; /* synthesised speech */
+  int i, m;              /* loop variable                         */
+  int frames;
+  float prev_f0;
+  float pitch;
+  float snr;
+  float sum_snr;
+
+  float pre_mem = 0.0, de_mem = 0.0;
+  float ak[1 + order];
+  // COMP  Sw_[FFT_ENC];
+  // COMP  Ew[FFT_ENC];
+
+  float ex_phase[MAX_AMP + 1];
+
+  float bg_est = 0.0;
+
+  MODEL prev_model;
+  float lsps[order];
+  float e, prev_e;
+  int lsp_indexes[order];
+  float lsps_[order];
+  float Woe_[2];
+
+  float lsps_dec[4][order], e_dec[4], weight, weight_inc, ak_dec[4][order];
+  MODEL model_dec[4], prev_model_dec;
+  float prev_lsps_dec[order], prev_e_dec;
+
+  void *nlp_states;
+  float hpf_states[2];
+#if 0
     struct PEXP *pexp = NULL;
     struct AEXP *aexp = NULL;
-    #endif
-    float bpf_buf[BPF_N+N_SAMP];
-
-    COMP Aw[FFT_ENC];
-    COMP H[MAX_AMP];
-
-    float sd_sum = 0.0; int sd_frames = 0;
-    
-    for(i=0; i<m_pitch; i++) {
-	Sn[i] = 1.0;
-	Sn_pre[i] = 1.0;
+#endif
+  float bpf_buf[BPF_N + N_SAMP];
+
+  COMP Aw[FFT_ENC];
+  COMP H[MAX_AMP];
+
+  float sd_sum = 0.0;
+  int sd_frames = 0;
+
+  for (i = 0; i < m_pitch; i++) {
+    Sn[i] = 1.0;
+    Sn_pre[i] = 1.0;
+  }
+  for (i = 0; i < 2 * N_SAMP; i++) Sn_[i] = 0;
+
+  prev_f0 = 1 / P_MAX_S;
+
+  prev_model.Wo = c2const.Wo_max;
+  prev_model.L = floor(PI / prev_model.Wo);
+  for (i = 1; i <= prev_model.L; i++) {
+    prev_model.A[i] = 0.0;
+    prev_model.phi[i] = 0.0;
+  }
+  for (i = 1; i <= MAX_AMP; i++) {
+    // ex_phase[i] = (PI/3)*(float)rand()/RAND_MAX;
+    ex_phase[i] = 0.0;
+  }
+  e = prev_e = 1;
+  hpf_states[0] = hpf_states[1] = 0.0;
+
+  nlp_states = nlp_create(&c2const);
+
+  ex_phase[0] = 0;
+  Woe_[0] = Woe_[1] = 1.0;
+
+  /* Initialise ------------------------------------------------------------*/
+
+  fft_fwd_cfg = codec2_fft_alloc(FFT_ENC, 0, NULL,
+                                 NULL); /* fwd FFT,used in several places   */
+  fftr_fwd_cfg = codec2_fftr_alloc(FFT_ENC, 0, NULL,
+                                   NULL); /* fwd FFT,used in several places   */
+  fftr_inv_cfg = codec2_fftr_alloc(FFT_DEC, 1, NULL,
+                                   NULL); /* inverse FFT, used just for synth */
+  codec2_fft_cfg phase_fft_fwd_cfg =
+      codec2_fft_alloc(NEWAMP1_PHASE_NFFT, 0, NULL, NULL);
+  codec2_fft_cfg phase_fft_inv_cfg =
+      codec2_fft_alloc(NEWAMP1_PHASE_NFFT, 1, NULL, NULL);
+
+  make_analysis_window(&c2const, fft_fwd_cfg, w, W);
+  make_synthesis_window(&c2const, Pn);
+
+  if (bpfb_en) bpf_en = 1;
+  if (bpf_en) {
+    for (i = 0; i < BPF_N; i++) bpf_buf[i] = 0.0;
+  }
+
+  for (i = 0; i < LPC_ORD; i++) {
+    prev_lsps_dec[i] = i * PI / (LPC_ORD + 1);
+  }
+  prev_e_dec = 1;
+  for (m = 1; m <= MAX_AMP; m++) prev_model_dec.A[m] = 0.0;
+  prev_model_dec.Wo = c2const.Wo_min;
+  prev_model_dec.L = PI / prev_model_dec.Wo;
+  prev_model_dec.voiced = 0;
+
+  /* mel resampling experiments */
+
+  float rate_K_sample_freqs_kHz[K];
+  float se = 0.0;
+  int nse = 0;
+  if (rateK) {
+    mel_sample_freqs_kHz(rate_K_sample_freqs_kHz, NEWAMP1_K, ftomel(200.0),
+                         ftomel(3700.0));
+  }
+  float rate_K_vec_delay[rate_K_dec + 1][K];
+  float rate_K_vec_delay_[rate_K_dec + 1][K];
+  MODEL rate_K_model_delay[rate_K_dec + 1];
+  for (int d = 0; d <= rate_K_dec; d++) {
+    for (int k = 0; k < K; k++) {
+      rate_K_vec_delay[d][k] = 0;
+      rate_K_vec_delay_[d][k] = 0;
     }
-    for(i=0; i<2*N_SAMP; i++)
-	Sn_[i] = 0;
+    for (m = 1; m <= MAX_AMP; m++) rate_K_model_delay[d].A[m] = 0.0;
+    rate_K_model_delay[d].Wo = c2const.Wo_min;
+    rate_K_model_delay[d].L = M_PI / prev_model_dec.Wo;
+    rate_K_model_delay[d].voiced = 0;
+  }
+  float eq[K];
+  for (int k = 0; k < K; k++) eq[k] = 0;
 
-    prev_f0 = 1/P_MAX_S;
+  /*----------------------------------------------------------------* \
 
-    prev_model.Wo = c2const.Wo_max;
-    prev_model.L = floor(PI/prev_model.Wo);
-    for(i=1; i<=prev_model.L; i++) {
-	prev_model.A[i] = 0.0;
-	prev_model.phi[i] = 0.0;
-    }
-    for(i=1; i<=MAX_AMP; i++) {
-	//ex_phase[i] = (PI/3)*(float)rand()/RAND_MAX;
-	ex_phase[i] = 0.0;
-    }
-    e = prev_e = 1;
-    hpf_states[0] = hpf_states[1] = 0.0;
-
-    nlp_states = nlp_create(&c2const);
+                          Main Loop
 
-    ex_phase[0] = 0;
-    Woe_[0] = Woe_[1] = 1.0;
+  \*----------------------------------------------------------------*/
 
-    /* Initialise ------------------------------------------------------------*/
+  frames = 0;
+  sum_snr = 0;
+  while (fread(buf, sizeof(short), N_SAMP, fin)) {
+    frames++;
 
-    fft_fwd_cfg = codec2_fft_alloc(FFT_ENC, 0, NULL, NULL);   /* fwd FFT,used in several places   */
-    fftr_fwd_cfg = codec2_fftr_alloc(FFT_ENC, 0, NULL, NULL); /* fwd FFT,used in several places   */
-    fftr_inv_cfg = codec2_fftr_alloc(FFT_DEC, 1, NULL, NULL); /* inverse FFT, used just for synth */
-    codec2_fft_cfg phase_fft_fwd_cfg = codec2_fft_alloc(NEWAMP1_PHASE_NFFT, 0, NULL, NULL);
-    codec2_fft_cfg phase_fft_inv_cfg = codec2_fft_alloc(NEWAMP1_PHASE_NFFT, 1, NULL, NULL);
+    for (i = 0; i < N_SAMP; i++) buf_float[i] = buf[i];
 
-    make_analysis_window(&c2const, fft_fwd_cfg, w, W);
-    make_synthesis_window(&c2const, Pn);
+    /* optionally filter input speech */
 
-    if (bpfb_en)
-        bpf_en = 1;
-    if (bpf_en) {
-        for(i=0; i<BPF_N; i++)
-            bpf_buf[i] = 0.0;
+    if (prede) {
+      pre_emp(Sn_pre, buf_float, &pre_mem, N_SAMP);
+      for (i = 0; i < N_SAMP; i++) buf_float[i] = Sn_pre[i];
     }
 
-    for(i=0; i<LPC_ORD; i++) {
-        prev_lsps_dec[i] = i*PI/(LPC_ORD+1);
+    if (bpf_en) {
+      /* filter input speech to create buf_float_bpf[], this is fed to the
+         LPC modelling.  Unfiltered speech in in buf_float[], which is
+         delayed to match that of the BPF */
+
+      /* BPF speech */
+
+      for (i = 0; i < BPF_N; i++) bpf_buf[i] = bpf_buf[N_SAMP + i];
+      for (i = 0; i < N_SAMP; i++) bpf_buf[BPF_N + i] = buf_float[i];
+      if (bpfb_en)
+        inverse_filter(&bpf_buf[BPF_N], bpfb, N_SAMP, buf_float, BPF_N);
+      else
+        inverse_filter(&bpf_buf[BPF_N], bpf, N_SAMP, buf_float, BPF_N);
     }
-    prev_e_dec = 1;
-    for(m=1; m<=MAX_AMP; m++)
-	prev_model_dec.A[m] = 0.0;
-    prev_model_dec.Wo = c2const.Wo_min;
-    prev_model_dec.L = PI/prev_model_dec.Wo;
-    prev_model_dec.voiced = 0;
 
-    /* mel resampling experiments */
+    /* shift buffer of input samples, and insert new samples */
 
-    float rate_K_sample_freqs_kHz[K]; float se = 0.0; int nse = 0;
-    if (rateK) {
-	mel_sample_freqs_kHz(rate_K_sample_freqs_kHz, NEWAMP1_K, ftomel(200.0), ftomel(3700.0) );
+    for (i = 0; i < m_pitch - N_SAMP; i++) {
+      Sn[i] = Sn[i + N_SAMP];
     }
-    float rate_K_vec_delay[rate_K_dec+1][K];
-    float rate_K_vec_delay_[rate_K_dec+1][K];
-    MODEL rate_K_model_delay[rate_K_dec+1];
-    for (int d=0; d<=rate_K_dec; d++) {
-        for(int k=0; k<K; k++) {
-            rate_K_vec_delay[d][k] = 0;
-            rate_K_vec_delay_[d][k] = 0;
-        }
-        for(m=1; m<=MAX_AMP; m++)
-            rate_K_model_delay[d].A[m] = 0.0;
-        rate_K_model_delay[d].Wo = c2const.Wo_min;
-        rate_K_model_delay[d].L = M_PI/prev_model_dec.Wo;
-        rate_K_model_delay[d].voiced = 0;
+    for (i = 0; i < N_SAMP; i++) {
+      Sn[i + m_pitch - N_SAMP] = buf_float[i];
     }
-    float eq[K];
-    for(int k=0; k<K; k++) eq[k] = 0;
-
-    /*----------------------------------------------------------------* \
-
-                            Main Loop
-
-    \*----------------------------------------------------------------*/
-
-    frames = 0;
-    sum_snr = 0;
-    while(fread(buf,sizeof(short),N_SAMP,fin)) {
-	frames++;
-
-	for(i=0; i<N_SAMP; i++)
-	    buf_float[i] = buf[i];
-
-	/* optionally filter input speech */
-
-        if (prede) {
-           pre_emp(Sn_pre, buf_float, &pre_mem, N_SAMP);
-           for(i=0; i<N_SAMP; i++)
-                buf_float[i] = Sn_pre[i];
-        }
-
-        if (bpf_en) {
-            /* filter input speech to create buf_float_bpf[], this is fed to the
-               LPC modelling.  Unfiltered speech in in buf_float[], which is
-               delayed to match that of the BPF */
-
-            /* BPF speech */
-
-            for(i=0; i<BPF_N; i++)
-                bpf_buf[i] =  bpf_buf[N_SAMP+i];
-            for(i=0; i<N_SAMP; i++)
-                bpf_buf[BPF_N+i] = buf_float[i];
-            if (bpfb_en)
-                inverse_filter(&bpf_buf[BPF_N], bpfb, N_SAMP, buf_float, BPF_N);
-            else
-                inverse_filter(&bpf_buf[BPF_N], bpf, N_SAMP, buf_float, BPF_N);
-        }
-
-        /* shift buffer of input samples, and insert new samples */
 
-	for(i=0; i<m_pitch-N_SAMP; i++) {
-	    Sn[i] = Sn[i+N_SAMP];
-	}
-	for(i=0; i<N_SAMP; i++) {
-	    Sn[i+m_pitch-N_SAMP] = buf_float[i];
-        }
-
-	/*------------------------------------------------------------*\
-
-                      Estimate Sinusoidal Model Parameters
-
-	\*------------------------------------------------------------*/
-
-        nlp(nlp_states, Sn, N_SAMP, &pitch, Sw, W, &prev_f0);
-	model.Wo = TWO_PI/pitch;
-
-        dft_speech(&c2const, fft_fwd_cfg, Sw, Sn, w);
-	two_stage_pitch_refinement(&c2const, &model, Sw);
-	estimate_amplitudes(&model, Sw, W, 1);
-
-        #ifdef DUMP
-        dump_Sn(m_pitch, Sn); dump_Sw(Sw); dump_model(&model);
-        #endif
+    /*------------------------------------------------------------*\
 
-	/* speech centred on analysis frame for Deep Learning work */
+                  Estimate Sinusoidal Model Parameters
 
-	if (ten_ms_centre) {
-	    int n_10_ms = Fs*0.01;
-	    int n_5_ms = Fs*0.005;
-	    short buf[n_10_ms];
-	    for(i=0; i<n_10_ms; i++) {
-		buf[i] = Sn[m_pitch/2-n_5_ms+i];
-	    }
-	    fwrite(buf, n_10_ms, sizeof(short), ften_ms_centre);
-	}
+    \*------------------------------------------------------------*/
 
-	if (hi) {
-	    int m;
-	    for(m=1; m<model.L/2; m++)
-		model.A[m] = 0.0;
-	    for(m=3*model.L/4; m<=model.L; m++)
-		model.A[m] = 0.0;
-	}
+    nlp(nlp_states, Sn, N_SAMP, &pitch, Sw, W, &prev_f0);
+    model.Wo = TWO_PI / pitch;
 
-	/*------------------------------------------------------------*\
+    dft_speech(&c2const, fft_fwd_cfg, Sw, Sn, w);
+    two_stage_pitch_refinement(&c2const, &model, Sw);
+    estimate_amplitudes(&model, Sw, W, 1);
 
-                            Zero-phase modelling
+#ifdef DUMP
+    dump_Sn(m_pitch, Sn);
+    dump_Sw(Sw);
+    dump_model(&model);
+#endif
 
-	\*------------------------------------------------------------*/
+    /* speech centred on analysis frame for Deep Learning work */
 
-	/* estimate voicing - do this all the time so model.voicing
-	 * is set, useful for machine learning work */
-	snr = est_voicing_mbe(&c2const, &model, Sw, W);
-
-	if (phase0) {
-            #ifdef DUMP
-	    dump_phase(&model.phi[0], model.L);
-            #endif
+    if (ten_ms_centre) {
+      int n_10_ms = Fs * 0.01;
+      int n_5_ms = Fs * 0.005;
+      short buf[n_10_ms];
+      for (i = 0; i < n_10_ms; i++) {
+        buf[i] = Sn[m_pitch / 2 - n_5_ms + i];
+      }
+      fwrite(buf, n_10_ms, sizeof(short), ften_ms_centre);
+    }
 
-	    if (dump_pitch_e)
-		fprintf(fjmv, "%f %f %d ", model.Wo, snr, model.voiced);
+    if (hi) {
+      int m;
+      for (m = 1; m < model.L / 2; m++) model.A[m] = 0.0;
+      for (m = 3 * model.L / 4; m <= model.L; m++) model.A[m] = 0.0;
+    }
 
-            #ifdef DUMP
-	    dump_snr(snr);
-            #endif
+    /*------------------------------------------------------------*\
 
-	    /* just to make sure we are not cheating - kill all phases */
+                        Zero-phase modelling
 
-	    for(i=0; i<=MAX_AMP; i++)
-	    	model.phi[i] = 0;
+    \*------------------------------------------------------------*/
 
-	    if (hand_voicing) {
-		int ret = fscanf(fvoicing,"%d\n",&model.voiced);
-                assert(ret == 1);
-	    }
-	}
+    /* estimate voicing - do this all the time so model.voicing
+     * is set, useful for machine learning work */
+    snr = est_voicing_mbe(&c2const, &model, Sw, W);
 
-	/*------------------------------------------------------------*\
+    if (phase0) {
+#ifdef DUMP
+      dump_phase(&model.phi[0], model.L);
+#endif
 
-	        LPC model amplitudes and LSP quantisation
+      if (dump_pitch_e) fprintf(fjmv, "%f %f %d ", model.Wo, snr, model.voiced);
 
-	\*------------------------------------------------------------*/
+#ifdef DUMP
+      dump_snr(snr);
+#endif
 
-	if (lpc_model) {
-            float ak_[LPC_ORD+1];
+      /* just to make sure we are not cheating - kill all phases */
 
-            e = speech_to_uq_lsps(lsps, ak, Sn, w, m_pitch, order);
-            for(i=0; i<order; i++)
-                lsps_[i] = lsps[i];
+      for (i = 0; i <= MAX_AMP; i++) model.phi[i] = 0;
 
-            #ifdef DUMP
-	    dump_ak(ak, order);
-            dump_E(e);
-            #endif
+      if (hand_voicing) {
+        int ret = fscanf(fvoicing, "%d\n", &model.voiced);
+        assert(ret == 1);
+      }
+    }
 
-	    if (dump_pitch_e)
-		fprintf(fjmv, "%f\n", e);
+    /*------------------------------------------------------------*\
 
-            #ifdef DUMP
-            dump_lsp(lsps);
-            #endif
+            LPC model amplitudes and LSP quantisation
 
-	    /* various LSP quantisation schemes */
+    \*------------------------------------------------------------*/
 
-	    if (lsp) {
-		encode_lsps_scalar(lsp_indexes, lsps, LPC_ORD);
-		decode_lsps_scalar(lsps_, lsp_indexes, LPC_ORD);
-		bw_expand_lsps(lsps_, LPC_ORD, 50.0, 100.0);
-		lsp_to_lpc(lsps_, ak_, LPC_ORD);
-	    }
+    if (lpc_model) {
+      float ak_[LPC_ORD + 1];
+
+      e = speech_to_uq_lsps(lsps, ak, Sn, w, m_pitch, order);
+      for (i = 0; i < order; i++) lsps_[i] = lsps[i];
+
+#ifdef DUMP
+      dump_ak(ak, order);
+      dump_E(e);
+#endif
+
+      if (dump_pitch_e) fprintf(fjmv, "%f\n", e);
+
+#ifdef DUMP
+      dump_lsp(lsps);
+#endif
+
+      /* various LSP quantisation schemes */
+
+      if (lsp) {
+        encode_lsps_scalar(lsp_indexes, lsps, LPC_ORD);
+        decode_lsps_scalar(lsps_, lsp_indexes, LPC_ORD);
+        bw_expand_lsps(lsps_, LPC_ORD, 50.0, 100.0);
+        lsp_to_lpc(lsps_, ak_, LPC_ORD);
+      }
+
+      if (lspd) {
+        encode_lspds_scalar(lsp_indexes, lsps, LPC_ORD);
+        decode_lspds_scalar(lsps_, lsp_indexes, LPC_ORD);
+        lsp_to_lpc(lsps_, ak_, LPC_ORD);
+      }
+
+      if (lspjmv) {
+        /* Jean-Marc's multi-stage, split VQ */
+        lspjmv_quantise(lsps, lsps_, LPC_ORD);
+        {
+          float lsps_bw[LPC_ORD];
+          memcpy(lsps_bw, lsps_, sizeof(float) * order);
+          bw_expand_lsps(lsps_bw, LPC_ORD, 50.0, 100.0);
+          lsp_to_lpc(lsps_bw, ak_, LPC_ORD);
+        }
+      }
+
+      if (lsp || lspd || lspjmv) {
+        sd_sum += spectral_dist(ak, ak_, LPC_ORD, fft_fwd_cfg, FFT_ENC);
+        sd_frames++;
+      }
+
+      memcpy(ak, ak_, (LPC_ORD + 1) * sizeof(float));
+
+      if (scalar_quant_Wo_e) {
+        e = decode_energy(encode_energy(e, E_BITS), E_BITS);
+        model.Wo = decode_Wo(&c2const, encode_Wo(&c2const, model.Wo, WO_BITS),
+                             WO_BITS);
+        model.L = PI / model.Wo; /* if we quantise Wo re-compute L */
+      }
+
+      if (scalar_quant_Wo_e_low) {
+        int ind;
+        e = decode_energy(ind = encode_energy(e, 3), 3);
+        model.Wo =
+            decode_log_Wo(&c2const, encode_log_Wo(&c2const, model.Wo, 5), 5);
+        model.L = PI / model.Wo; /* if we quantise Wo re-compute L */
+      }
+
+      if (vector_quant_Wo_e) {
+        /* JVM's experimental joint Wo & LPC energy quantiser */
+        quantise_WoE(&c2const, &model, &e, Woe_);
+      }
+    }
 
-	    if (lspd) {
-		encode_lspds_scalar(lsp_indexes, lsps, LPC_ORD);
-		decode_lspds_scalar(lsps_, lsp_indexes, LPC_ORD);
-		lsp_to_lpc(lsps_, ak_, LPC_ORD);
-	    }
-
-	    if (lspjmv) {
-		/* Jean-Marc's multi-stage, split VQ */
-		lspjmv_quantise(lsps, lsps_, LPC_ORD);
-		{
-		    float lsps_bw[LPC_ORD];
-		    memcpy(lsps_bw, lsps_, sizeof(float)*order);
-		    bw_expand_lsps(lsps_bw, LPC_ORD, 50.0, 100.0);
-		    lsp_to_lpc(lsps_bw, ak_, LPC_ORD);
-		}
-	    }
-
-            if (lsp || lspd || lspjmv) {
-                sd_sum += spectral_dist(ak, ak_, LPC_ORD, fft_fwd_cfg, FFT_ENC);
-                sd_frames ++;
-            }
+    if (amread) {
+      int ret = fread(model.A, sizeof(float), MAX_AMP, fam);
+      assert(ret == MAX_AMP);
+    }
 
-            memcpy(ak, ak_, (LPC_ORD+1)*sizeof(float));
+    if (Woread) {
+      int ret = fread(&model.Wo, sizeof(float), 1, fWo);
+      model.L = floor(PI / model.Wo);
+      assert(ret == 1);
+    }
 
-	    if (scalar_quant_Wo_e) {
-		e = decode_energy(encode_energy(e, E_BITS), E_BITS);
-                model.Wo = decode_Wo(&c2const, encode_Wo(&c2const, model.Wo, WO_BITS), WO_BITS);
-		model.L  = PI/model.Wo; /* if we quantise Wo re-compute L */
-	    }
+    /* dump features for Deep learning, placed here so we can get quantised
+     * features */
+
+    if (lspEWov) {
+      /* order LSPs - energy - Wo - voicing flag - order LPCs */
+      if (lsp)
+        fwrite(lsps_, order, sizeof(float), flspEWov);
+      else
+        fwrite(lsps, order, sizeof(float), flspEWov);
+
+      fwrite(&e, 1, sizeof(float), flspEWov);
+      fwrite(&model.Wo, 1, sizeof(float), flspEWov);
+      float voiced_float = model.voiced;
+      fwrite(&voiced_float, 1, sizeof(float), flspEWov);
+      fwrite(&ak[1], order, sizeof(float), flspEWov);
+    }
 
-	    if (scalar_quant_Wo_e_low) {
-                int ind;
-		e = decode_energy(ind = encode_energy(e, 3), 3);
-                model.Wo = decode_log_Wo(&c2const, encode_log_Wo(&c2const, model.Wo, 5), 5);
-		model.L  = PI/model.Wo; /* if we quantise Wo re-compute L */
-	    }
+    /* LPCNet type mel spaced band ML data */
+    float bands_mean = 0.0;
+    if (fbands) {
+      float bandE[LPCNET_FREQ_MAX_BANDS];
+      float freqkHz[LPCNET_FREQ_MAX_BANDS];
+      int nbands = lpcnet_compute_band_energy(bandE, freqkHz, Sw, Fs, FFT_ENC);
+      for (int i = 0; i < nbands; i++) bands_mean += bandE[i];
+      bands_mean /= nbands;
+      // fprintf(stderr, "bands_mean: %f bands_lower %f\n", bands_mean,
+      // bands_lower);
+      if (bands_mean > bands_lower)
+        assert(fwrite(bandE, sizeof(float), nbands, fbands) == nbands);
+      // optionally reconstruct [Am} by linear interpolation of band energies,
+      // this doesn't sound very Good
+      if (bands_resample)
+        resample_rate_L(&c2const, &model, &bandE[1], &freqkHz[1], nbands - 2);
+    }
 
-	    if (vector_quant_Wo_e) {
-		/* JVM's experimental joint Wo & LPC energy quantiser */
-		quantise_WoE(&c2const, &model, &e, Woe_);
-	    }
+    /*------------------------------------------------------------*\
 
-	}
+                Optional newamp1 simulation, as used in 700C
 
-        if (amread) {
-            int ret = fread(model.A, sizeof(float), MAX_AMP, fam);
-            assert(ret == MAX_AMP);
-        }
+    \*------------------------------------------------------------*/
 
-        if (Woread) {
-            int ret = fread(&model.Wo, sizeof(float), 1, fWo);
-            model.L = floor(PI/model.Wo);
-            assert(ret == 1);
+    if (rateK) {
+      float rate_K_vec[K];
+      resample_const_rate_f(&c2const, &model, rate_K_vec,
+                            rate_K_sample_freqs_kHz, K);
+
+      if (frateK != NULL)
+        assert(fwrite(rate_K_vec, sizeof(float), K, frateK) == K);
+
+      if (frateKin != NULL) {
+        assert(fread(rate_K_vec, sizeof(float), K, frateKin) == K);
+        /* apply newamp1 postfilter - this helped male samples with VQVAE work
+         */
+        float sum = 0.0;
+        for (int k = 0; k < K; k++) sum += rate_K_vec[k];
+        float mean = sum / K;
+        float rate_K_vec_no_mean[K];
+        for (int k = 0; k < K; k++)
+          rate_K_vec_no_mean[k] = rate_K_vec[k] - mean;
+        post_filter_newamp1(rate_K_vec_no_mean, rate_K_sample_freqs_kHz, K,
+                            1.5);
+        for (int k = 0; k < K; k++)
+          rate_K_vec[k] = rate_K_vec_no_mean[k] + mean;
+      }
+
+      float rate_K_vec_[K];
+      if (newamp1vq) {
+        /* remove mean */
+        float sum = 0.0;
+        for (int k = 0; k < K; k++) sum += rate_K_vec[k];
+        float mean = sum / K;
+        float rate_K_vec_no_mean[K];
+        for (int k = 0; k < K; k++)
+          rate_K_vec_no_mean[k] = rate_K_vec[k] - mean;
+
+        newamp1_eq(rate_K_vec_no_mean, eq, K, 1);
+
+        /* two stage VQ */
+        float rate_K_vec_no_mean_[K];
+        int indexes[2];
+        rate_K_mbest_encode(indexes, rate_K_vec_no_mean, rate_K_vec_no_mean_, K,
+                            NEWAMP1_VQ_MBEST_DEPTH);
+        for (int k = 0; k < K; k++)
+          rate_K_vec_[k] = rate_K_vec_no_mean_[k] + mean;
+
+        /* running sum of squared error for variance calculation */
+        for (int k = 0; k < K; k++)
+          se += pow(rate_K_vec_no_mean[k] - rate_K_vec_no_mean_[k], 2.0);
+        nse += K;
+      } else {
+        for (int k = 0; k < K; k++) rate_K_vec_[k] = rate_K_vec[k];
+      }
+
+      if (frateKWov != NULL) {
+        /* We use standard nb_features=55 feature records for compatibility with
+         * train_lpcnet.py */
+        float features[55] = {0};
+        /* just using 18/20 for compatibility with LPCNet, coarse scaling for NN
+         * input */
+        for (int i = 0; i < 18; i++) features[i] = (rate_K_vec_[i] - 30) / 40;
+        // keep in range of 40 ... 255 for pitch embedding
+        int pitch_index = 21 + 2.0 * M_PI / model.Wo;
+        features[36] = 0.02 * (pitch_index - 100);
+        // features[36] = (model.Wo - c2const.Wo_min)/(c2const.Wo_max -
+        // c2const.Wo_min) - 0.5;
+        features[37] = model.voiced;
+        if (first) features[18] = -0.9;
+        if (lpc_model) {
+          MODEL model_;
+          model_.Wo = model.Wo;
+          model_.L = model.L;
+          model_.voiced = model.voiced;
+          float Rk[order + 1], ak[order + 1];
+          resample_rate_L(&c2const, &model_, rate_K_vec_,
+                          rate_K_sample_freqs_kHz, K);
+          determine_autoc(&c2const, Rk, order, &model_, NEWAMP1_PHASE_NFFT,
+                          phase_fft_fwd_cfg, phase_fft_inv_cfg);
+          /* -40 dB noise floor and Lag windowing from LPCNet/freq.c - helps
+             reduce large spikes in spectrum when LPC analysis loses it. */
+          Rk[0] += Rk[0] * 1e-4 + 320 / 12 / 38.;
+          for (i = 1; i < order + 1; i++) Rk[i] *= (1 - 6e-5 * i * i);
+          levinson_durbin(Rk, ak, order);
+
+          for (int i = 0; i < order; i++) features[18 + i] = ak[i + 1];
         }
-
-        /* dump features for Deep learning, placed here so we can get quantised features */
-
-        if (lspEWov) {
-            /* order LSPs - energy - Wo - voicing flag - order LPCs */
-            if (lsp)
-                fwrite(lsps_, order, sizeof(float), flspEWov);
-            else
-                fwrite(lsps, order, sizeof(float), flspEWov);
-
-            fwrite(&e, 1, sizeof(float), flspEWov);
-            fwrite(&model.Wo, 1, sizeof(float), flspEWov);
-            float voiced_float = model.voiced;
-            fwrite(&voiced_float, 1, sizeof(float), flspEWov);
-            fwrite(&ak[1], order, sizeof(float), flspEWov);
+        fwrite(features, 55, sizeof(float), frateKWov);
+      }
+
+      if (rate_K_dec) {
+        // update delay lines
+        for (int d = 0; d < rate_K_dec; d++) {
+          rate_K_model_delay[d] = rate_K_model_delay[d + 1];
+          memcpy(&rate_K_vec_delay[d][0], &rate_K_vec_delay[d + 1][0],
+                 sizeof(float) * K);
         }
-
-	/* LPCNet type mel spaced band ML data */
-	float bands_mean = 0.0;
-	if (fbands) {
-	    float bandE[LPCNET_FREQ_MAX_BANDS];
-            float freqkHz[LPCNET_FREQ_MAX_BANDS];
-	    int nbands = lpcnet_compute_band_energy(bandE, freqkHz, Sw, Fs, FFT_ENC);
-	    for(int i=0; i<nbands; i++)
-		bands_mean += bandE[i];
-	    bands_mean /= nbands;
-	    //fprintf(stderr, "bands_mean: %f bands_lower %f\n", bands_mean,  bands_lower);
-	    if (bands_mean > bands_lower)
- 		assert(fwrite(bandE, sizeof(float), nbands, fbands) == nbands);
-            // optionally reconstruct [Am} by linear interpolation of band energies,
-            // this doesn't sound very Good
-            if (bands_resample)
-                resample_rate_L(&c2const, &model, &bandE[1], &freqkHz[1], nbands-2);
-	}
-
-	/*------------------------------------------------------------*\
-
-	            Optional newamp1 simulation, as used in 700C
-
-	\*------------------------------------------------------------*/
-
-        if (rateK) {
-            float rate_K_vec[K];
-            resample_const_rate_f(&c2const, &model, rate_K_vec, rate_K_sample_freqs_kHz, K);
-
-	    if (frateK != NULL)
-		assert(fwrite(rate_K_vec, sizeof(float), K, frateK) == K);
-	    
-	    if (frateKin != NULL) {
-		assert(fread(rate_K_vec, sizeof(float), K, frateKin) == K);
-		/* apply newamp1 postfilter - this helped male samples with VQVAE work */
-                float sum = 0.0;
-                for(int k=0; k<K; k++)
-                    sum += rate_K_vec[k];
-                float mean = sum/K;
-                float rate_K_vec_no_mean[K];
-                for(int k=0; k<K; k++)
-                    rate_K_vec_no_mean[k] = rate_K_vec[k] - mean;
-		post_filter_newamp1(rate_K_vec_no_mean,  rate_K_sample_freqs_kHz, K, 1.5);
-                for(int k=0; k<K; k++)
-                    rate_K_vec[k] = rate_K_vec_no_mean[k] +  mean;
-	    }
-	    
-            float rate_K_vec_[K];
-            if (newamp1vq) {
-                /* remove mean */
-                float sum = 0.0;
-                for(int k=0; k<K; k++)
-                    sum += rate_K_vec[k];
-                float mean = sum/K;
-                float rate_K_vec_no_mean[K];
-                for(int k=0; k<K; k++)
-                    rate_K_vec_no_mean[k] = rate_K_vec[k] - mean;
-
-		newamp1_eq(rate_K_vec_no_mean, eq, K, 1);
-
-                /* two stage VQ */
-                float rate_K_vec_no_mean_[K]; int indexes[2];
-                rate_K_mbest_encode(indexes, rate_K_vec_no_mean, rate_K_vec_no_mean_, K, NEWAMP1_VQ_MBEST_DEPTH);
-                for(int k=0; k<K; k++)
-                    rate_K_vec_[k] = rate_K_vec_no_mean_[k] + mean;
-
-                /* running sum of squared error for variance calculation */
-                for(int k=0; k<K; k++)
-                    se += pow(rate_K_vec_no_mean[k]-rate_K_vec_no_mean_[k],2.0);
-                nse += K;
-            }
-            else {
-                for(int k=0; k<K; k++)
-                    rate_K_vec_[k] = rate_K_vec[k];
+        rate_K_model_delay[rate_K_dec] = model;
+        memcpy(&rate_K_vec_delay[rate_K_dec][0], rate_K_vec_,
+               sizeof(float) * K);
+
+        if ((frames % rate_K_dec) == 0) {
+          // every rate_K_dec frames, calculate interpolated output values
+          if (perframe) {
+            // calculate interpolation coeff c for each frame
+            float *A = &rate_K_vec_delay[0][0];
+            float *B = &rate_K_vec_delay[rate_K_dec][0];
+            for (int d = 0; d <= rate_K_dec; d++) {
+              float *T = &rate_K_vec_delay[d][0];
+              float num = 0.0, den = 0.0;
+              for (int k = 0; k < K; k++) {
+                num += (B[k] - T[k]) * (A[k] - B[k]);
+                den += (A[k] - B[k]) * (A[k] - B[k]);
+              }
+              float c = -num / den;
+              for (int k = 0; k < K; k++)
+                rate_K_vec_delay_[d][k] = c * A[k] + (1.0 - c) * B[k];
             }
-
-	    if (frateKWov != NULL) {
-		/* We use standard nb_features=55 feature records for compatibility with train_lpcnet.py */
-		float features[55] = {0};
-		/* just using 18/20 for compatibility with LPCNet, coarse scaling for NN input */
-		for(int i=0; i<18; i++)
-		    features[i] = (rate_K_vec_[i]-30)/40;
-		// keep in range of 40 ... 255 for pitch embedding
-		int pitch_index = 21 + 2.0*M_PI/model.Wo;
-		features[36] = 0.02*(pitch_index-100);
-		//features[36] = (model.Wo - c2const.Wo_min)/(c2const.Wo_max - c2const.Wo_min) - 0.5;
-		features[37] = model.voiced;
-		if (first)
-		    features[18] = -0.9;
-		if (lpc_model) {
-		    MODEL model_;
-		    model_.Wo = model.Wo;
-		    model_.L  = model.L;
-		    model_.voiced = model.voiced;
-		    float Rk[order+1], ak[order+1];
-		    resample_rate_L(&c2const, &model_, rate_K_vec_, rate_K_sample_freqs_kHz, K);
-		    determine_autoc(&c2const, Rk, order, &model_, NEWAMP1_PHASE_NFFT, phase_fft_fwd_cfg, phase_fft_inv_cfg);
-		    /* -40 dB noise floor and Lag windowing from LPCNet/freq.c - helps reduce large spikes in spectrum when LPC
-                       analysis loses it. */
-		    Rk[0] += Rk[0]*1e-4 + 320/12/38.;
-		    for (i=1;i<order+1;i++) Rk[i] *= (1 - 6e-5*i*i);
-		    levinson_durbin(Rk, ak, order);
-
-		    for(int i=0; i<order; i++)
-			features[18+i] = ak[i+1];
-		}
-		fwrite(features, 55, sizeof(float), frateKWov);
-	    }
-
-            if (rate_K_dec) {
-                // update delay lines
-                for(int d=0; d<rate_K_dec; d++) {
-                    rate_K_model_delay[d] = rate_K_model_delay[d+1];
-                    memcpy(&rate_K_vec_delay[d][0], &rate_K_vec_delay[d+1][0], sizeof(float)*K);
-                }
-                rate_K_model_delay[rate_K_dec] = model;
-                memcpy(&rate_K_vec_delay[rate_K_dec][0], rate_K_vec_, sizeof(float)*K);
-
-                if ((frames % rate_K_dec) == 0) {
-                    // every rate_K_dec frames, calculate interpolated output values
-                    if (perframe) {
-                        // calculate interpolation coeff c for each frame
-                        float *A = &rate_K_vec_delay[0][0];
-                        float *B = &rate_K_vec_delay[rate_K_dec][0];
-                        for(int d=0; d<=rate_K_dec; d++) {
-                            float *T = &rate_K_vec_delay[d][0];
-                            float num = 0.0, den = 0.0;
-                            for(int k=0; k<K; k++) {
-                                num += (B[k]-T[k])*(A[k]-B[k]);
-                                den += (A[k]-B[k])*(A[k]-B[k]);
-                            }
-                            float c = -num/den;
-                            for(int k=0; k<K; k++)
-                                rate_K_vec_delay_[d][k] = c*A[k] + (1.0-c)*B[k];
-                        }
-                    }
-                    else {
-                        // use linear interpolation
-                        float c=0.0, inc = 1.0/rate_K_dec;
-                        for(int d=0; d<=rate_K_dec; d++) {
-                            for(int k=0; k<K; k++)
-                                rate_K_vec_delay_[d][k] = (1.0-c)*rate_K_vec_delay[0][k] + c*rate_K_vec_delay[rate_K_dec][k];
-                            c += inc;
-                        }
-                    }
-                } else {
-                    // otherwise just shift out frames we have already interpolated
-                    for(int d=0; d<rate_K_dec; d++) {
-                        memcpy(&rate_K_vec_delay_[d][0], &rate_K_vec_delay_[d+1][0], sizeof(float)*K);
-                    }
-                }
-
-                // output from delay line
-                model = rate_K_model_delay[0];
-                for(int k=0; k<K; k++)
-                    rate_K_vec_[k] = rate_K_vec_delay_[0][k];
+          } else {
+            // use linear interpolation
+            float c = 0.0, inc = 1.0 / rate_K_dec;
+            for (int d = 0; d <= rate_K_dec; d++) {
+              for (int k = 0; k < K; k++)
+                rate_K_vec_delay_[d][k] = (1.0 - c) * rate_K_vec_delay[0][k] +
+                                          c * rate_K_vec_delay[rate_K_dec][k];
+              c += inc;
             }
-	    
-            resample_rate_L(&c2const, &model, rate_K_vec_, rate_K_sample_freqs_kHz, K);
+          }
+        } else {
+          // otherwise just shift out frames we have already interpolated
+          for (int d = 0; d < rate_K_dec; d++) {
+            memcpy(&rate_K_vec_delay_[d][0], &rate_K_vec_delay_[d + 1][0],
+                   sizeof(float) * K);
+          }
         }
 
-	/*------------------------------------------------------------*\
-
-          Synthesise and optional decimation to 20 or 40ms frame rate
+        // output from delay line
+        model = rate_K_model_delay[0];
+        for (int k = 0; k < K; k++) rate_K_vec_[k] = rate_K_vec_delay_[0][k];
+      }
 
-	\*------------------------------------------------------------*/
-
-        /*
-           if decimate == 2, we interpolate frame n from frame n-1 and n+1
-           if decimate == 4, we interpolate frames n, n+1, n+2, from frames n-1 and n+3
-
-           This is meant to give identical results to the implementations of various modes
-           in codec2.c
-        */
+      resample_rate_L(&c2const, &model, rate_K_vec_, rate_K_sample_freqs_kHz,
+                      K);
+    }
 
-        /* delay line to keep frame by frame voicing decisions */
+    /*------------------------------------------------------------*\
+
+      Synthesise and optional decimation to 20 or 40ms frame rate
+
+    \*------------------------------------------------------------*/
+
+    /*
+       if decimate == 2, we interpolate frame n from frame n-1 and n+1
+       if decimate == 4, we interpolate frames n, n+1, n+2, from frames n-1 and
+       n+3
+
+       This is meant to give identical results to the implementations of various
+       modes in codec2.c
+    */
+
+    /* delay line to keep frame by frame voicing decisions */
+
+    for (i = 0; i < decimate - 1; i++) model_dec[i] = model_dec[i + 1];
+    model_dec[decimate - 1] = model;
+
+    if ((frames % decimate) == 0) {
+      for (i = 0; i < order; i++) lsps_dec[decimate - 1][i] = lsps_[i];
+      e_dec[decimate - 1] = e;
+      model_dec[decimate - 1] = model;
+
+      /* interpolate the model parameters */
+
+      weight_inc = 1.0 / decimate;
+      for (i = 0, weight = weight_inc; i < decimate - 1;
+           i++, weight += weight_inc) {
+        // model_dec[i].voiced = model_dec[decimate-1].voiced;
+        interpolate_lsp_ver2(&lsps_dec[i][0], prev_lsps_dec,
+                             &lsps_dec[decimate - 1][0], weight, order);
+        interp_Wo2(&model_dec[i], &prev_model_dec, &model_dec[decimate - 1],
+                   weight, c2const.Wo_min);
+        e_dec[i] = interp_energy2(prev_e_dec, e_dec[decimate - 1], weight);
+      }
+
+      /* then recover spectral amplitudes and synthesise */
+
+      for (i = 0; i < decimate; i++) {
+        if (lpc_model) {
+          lsp_to_lpc(&lsps_dec[i][0], &ak_dec[i][0], order);
+          aks_to_M2(fftr_fwd_cfg, &ak_dec[i][0], order, &model_dec[i], e_dec[i],
+                    &snr, 0, simlpcpf, lpcpf, 1, LPCPF_BETA, LPCPF_GAMMA, Aw);
+          apply_lpc_correction(&model_dec[i]);
+          sum_snr += snr;
+#ifdef DUMP
+          dump_lsp_(&lsps_dec[i][0]);
+          dump_ak_(&ak_dec[i][0], order);
+          dump_quantised_model(&model_dec[i]);
+#endif
+        }
 
-        for(i=0; i<decimate-1; i++)
-            model_dec[i] = model_dec[i+1];
-        model_dec[decimate-1] = model;
+        if (modelin) {
+          int nrec;
+          nrec = fread(&model_dec[i], sizeof(MODEL), 1, fmodelin);
+          if (nrec != 1) {
+            fprintf(stderr,
+                    "Warning - error reading model in record in frame %d - do "
+                    "you have enough records in file?\n",
+                    frames);
+          }
+        }
 
-        if ((frames % decimate) == 0) {
-            for(i=0; i<order; i++)
-                lsps_dec[decimate-1][i] = lsps_[i];
-            e_dec[decimate-1] = e;
-            model_dec[decimate-1] = model;
+        if (phase0) {
+          /* optionally read in Aw, replacing values generated using LPC */
 
-            /* interpolate the model parameters */
+          if (awread) {
+            int ret = fread(Aw, sizeof(COMP), FFT_ENC, faw);
+            assert(ret == FFT_ENC);
+          }
 
-            weight_inc = 1.0/decimate;
-            for(i=0, weight=weight_inc; i<decimate-1; i++, weight += weight_inc) {
-                //model_dec[i].voiced = model_dec[decimate-1].voiced;
-                interpolate_lsp_ver2(&lsps_dec[i][0], prev_lsps_dec, &lsps_dec[decimate-1][0], weight, order);
-                interp_Wo2(&model_dec[i], &prev_model_dec, &model_dec[decimate-1], weight, c2const.Wo_min);
-                e_dec[i] = interp_energy2(prev_e_dec, e_dec[decimate-1],weight);
-            }
+          /* optionally read in Hm directly, bypassing sampling of Aw[] */
 
-            /* then recover spectral amplitudes and synthesise */
-
-            for(i=0; i<decimate; i++) {
-                if (lpc_model) {
-                    lsp_to_lpc(&lsps_dec[i][0], &ak_dec[i][0], order);
-                    aks_to_M2(fftr_fwd_cfg, &ak_dec[i][0], order, &model_dec[i], e_dec[i],
-                              &snr, 0, simlpcpf, lpcpf, 1, LPCPF_BETA, LPCPF_GAMMA, Aw);
-                    apply_lpc_correction(&model_dec[i]);
-                    sum_snr += snr;
-                    #ifdef DUMP
-                    dump_lsp_(&lsps_dec[i][0]);
-                    dump_ak_(&ak_dec[i][0], order);
-                    dump_quantised_model(&model_dec[i]);
-                    #endif
-                }
-
-                if (modelin) {
-                    int nrec;
-                    nrec = fread(&model_dec[i],sizeof(MODEL),1,fmodelin);
-                    if (nrec != 1) {
-			fprintf(stderr, "Warning - error reading model in record in frame %d - do you have enough records in file?\n", frames);
-		    }
-                }
-
-                if (phase0) {
-                    /* optionally read in Aw, replacing values generated using LPC */
-
-                    if (awread) {
-                        int ret = fread(Aw, sizeof(COMP), FFT_ENC, faw);
-                        assert(ret == FFT_ENC);
-                    }
-
-                    /* optionally read in Hm directly, bypassing sampling of Aw[] */
-
-                    if (hmread) {
-                        int ret = fread(H, sizeof(COMP), MAX_AMP, fhm);
-                        assert(ret == MAX_AMP);
-                    } else {
-                        determine_phase(&c2const, H, &model_dec[i], NEWAMP1_PHASE_NFFT, phase_fft_fwd_cfg, phase_fft_inv_cfg);
-                    }
-                    phase_synth_zero_order(n_samp, &model_dec[i], ex_phase, H);
-                }
-
-                if (postfilt)
-                    postfilter(&model_dec[i], &bg_est);
-                synth_one_frame(n_samp, fftr_inv_cfg, buf, &model_dec[i], Sn_, Pn, prede, &de_mem, gain);
-                if (fout != NULL)
-                    fwrite(buf,sizeof(short),N_SAMP,fout);
-                if (modelout) {
-		    /* optionally don't write to filter out low energy frames */
-		    if (bands) {
-			if (bands_mean > bands_lower)
-			    fwrite(&model_dec[i],sizeof(MODEL),1,fmodelout);
-		    }
-		    else
-			fwrite(&model_dec[i],sizeof(MODEL),1,fmodelout);
-		}
-            }
+          if (hmread) {
+            int ret = fread(H, sizeof(COMP), MAX_AMP, fhm);
+            assert(ret == MAX_AMP);
+          } else {
+            determine_phase(&c2const, H, &model_dec[i], NEWAMP1_PHASE_NFFT,
+                            phase_fft_fwd_cfg, phase_fft_inv_cfg);
+          }
+          phase_synth_zero_order(n_samp, &model_dec[i], ex_phase, H);
+        }
 
-            /* update memories for next frame ----------------------------*/
+        if (postfilt) postfilter(&model_dec[i], &bg_est);
+        synth_one_frame(n_samp, fftr_inv_cfg, buf, &model_dec[i], Sn_, Pn,
+                        prede, &de_mem, gain);
+        if (fout != NULL) fwrite(buf, sizeof(short), N_SAMP, fout);
+        if (modelout) {
+          /* optionally don't write to filter out low energy frames */
+          if (bands) {
+            if (bands_mean > bands_lower)
+              fwrite(&model_dec[i], sizeof(MODEL), 1, fmodelout);
+          } else
+            fwrite(&model_dec[i], sizeof(MODEL), 1, fmodelout);
+        }
+      }
 
-            prev_model_dec = model_dec[decimate-1];
-            prev_e_dec = e_dec[decimate-1];
-            for(i=0; i<LPC_ORD; i++)
-                prev_lsps_dec[i] = lsps_dec[decimate-1][i];
-       }
+      /* update memories for next frame ----------------------------*/
 
+      prev_model_dec = model_dec[decimate - 1];
+      prev_e_dec = e_dec[decimate - 1];
+      for (i = 0; i < LPC_ORD; i++)
+        prev_lsps_dec[i] = lsps_dec[decimate - 1][i];
     }
+  }
+
+  /*----------------------------------------------------------------*\
+
+                          End Main Loop
+
+  \*----------------------------------------------------------------*/
+
+  fclose(fin);
+
+  if (fout != NULL) fclose(fout);
+
+  if (lpc_model) {
+    fprintf(stderr, "LPC->{Am} SNR av: %5.2f dB over %d frames\n",
+            sum_snr / frames, frames);
+    if (lsp || lspd || lspjmv)
+      fprintf(stderr, "LSP quantiser SD: %5.2f dB*dB over %d frames\n",
+              sd_sum / sd_frames, sd_frames);
+  }
+  if (newamp1vq) {
+    fprintf(stderr, "var: %3.2f dB*dB\n", se / nse);
+  }
+#ifdef DUMP
+  if (dump) dump_off();
+#endif
+
+  if (hand_voicing) fclose(fvoicing);
+
+  nlp_destroy(nlp_states);
+
+  if (fam != NULL) fclose(fam);
+  if (fWo != NULL) fclose(fWo);
+  if (faw != NULL) fclose(faw);
+  if (fhm != NULL) fclose(fhm);
+  if (fjmv != NULL) fclose(fjmv);
+  if (flspEWov != NULL) fclose(flspEWov);
+  if (fphasenn != NULL) fclose(fphasenn);
+  if (frateK != NULL) fclose(frateK);
+  if (frateKin != NULL) fclose(frateKin);
+  if (ften_ms_centre != NULL) fclose(ften_ms_centre);
+  if (fmodelout != NULL) fclose(fmodelout);
+  if (fbands != NULL) fclose(fbands);
+  if (frateKWov != NULL) fclose(frateKWov);
+
+  return 0;
+}
 
-    /*----------------------------------------------------------------*\
-
-                            End Main Loop
-
-    \*----------------------------------------------------------------*/
-
-    fclose(fin);
-
-    if (fout != NULL)
-	fclose(fout);
-
-    if (lpc_model) {
-    	fprintf(stderr, "LPC->{Am} SNR av: %5.2f dB over %d frames\n", sum_snr/frames, frames);
-        if (lsp || lspd || lspjmv)
-            fprintf(stderr, "LSP quantiser SD: %5.2f dB*dB over %d frames\n", sd_sum/sd_frames, sd_frames);     
-    }
-    if (newamp1vq) {
-    	fprintf(stderr, "var: %3.2f dB*dB\n", se/nse);
-    }
-    #ifdef DUMP
-    if (dump)
-	dump_off();
-    #endif
-
-    if (hand_voicing)
-	fclose(fvoicing);
-
-    nlp_destroy(nlp_states);
-
-    if (fam     != NULL) fclose(fam);
-    if (fWo     != NULL) fclose(fWo);
-    if (faw     != NULL) fclose(faw);
-    if (fhm     != NULL) fclose(fhm);
-    if (fjmv    != NULL) fclose(fjmv);
-    if (flspEWov != NULL) fclose(flspEWov);
-    if (fphasenn != NULL) fclose(fphasenn);
-    if (frateK != NULL) fclose(frateK);
-    if (frateKin != NULL) fclose(frateKin);
-    if (ften_ms_centre != NULL) fclose(ften_ms_centre);
-    if (fmodelout != NULL) fclose(fmodelout);
-    if (fbands != NULL) fclose(fbands);
-    if (frateKWov != NULL) fclose(frateKWov);
-
-    return 0;
+void synth_one_frame(int n_samp, codec2_fftr_cfg fftr_inv_cfg, short buf[],
+                     MODEL *model, float Sn_[], float Pn[], int prede,
+                     float *de_mem, float gain) {
+  int i;
+
+  synthesise(n_samp, fftr_inv_cfg, Sn_, model, Pn, 1);
+  if (prede) de_emp(Sn_, Sn_, de_mem, n_samp);
+
+  for (i = 0; i < n_samp; i++) {
+    Sn_[i] *= gain;
+    if (Sn_[i] > 32767.0)
+      buf[i] = 32767;
+    else if (Sn_[i] < -32767.0)
+      buf[i] = -32767;
+    else
+      buf[i] = Sn_[i];
+  }
 }
 
-void synth_one_frame(int n_samp, codec2_fftr_cfg fftr_inv_cfg, short buf[], MODEL *model, float Sn_[],
-                     float Pn[], int prede, float *de_mem, float gain)
-{
-    int     i;
-
-    synthesise(n_samp, fftr_inv_cfg, Sn_, model, Pn, 1);
-    if (prede)
-        de_emp(Sn_, Sn_, de_mem, n_samp);
-
-    for(i=0; i<n_samp; i++) {
-	Sn_[i] *= gain;
-	if (Sn_[i] > 32767.0)
-	    buf[i] = 32767;
-	else if (Sn_[i] < -32767.0)
-	    buf[i] = -32767;
-	else
-	    buf[i] = Sn_[i];
+void print_help(const struct option *long_options, int num_opts, char *argv[]) {
+  int i;
+  char *option_parameters;
+
+  fprintf(stderr,
+          "\nCodec2 - low bit rate speech codec - Simulation Program\n"
+          "\thttp://rowetel.com/codec2.html\n\n"
+          "usage: %s [OPTIONS] <InputFile>\n\n"
+          "Options:\n"
+          "\t-o <OutputFile>\n",
+          argv[0]);
+  for (i = 0; i < num_opts - 1; i++) {
+    if (long_options[i].has_arg == no_argument) {
+      option_parameters = "";
+    } else if (strcmp("lpc", long_options[i].name) == 0) {
+      option_parameters = " <Order>";
+    } else if (strcmp("dec", long_options[i].name) == 0) {
+      option_parameters = " <2|4>";
+    } else if (strcmp("hand_voicing", long_options[i].name) == 0) {
+      option_parameters = " <VoicingFile>";
+    } else if (strcmp("dump_pitch_e", long_options[i].name) == 0) {
+      option_parameters = " <Dump File>";
+    } else if (strcmp("rate", long_options[i].name) == 0) {
+      option_parameters = " <3200|2400|1400|1300|1200>";
+    } else if (strcmp("dump", long_options[i].name) == 0) {
+      option_parameters = " <DumpFilePrefix>";
+    } else {
+      option_parameters = " <UNDOCUMENTED parameter>";
     }
+    fprintf(stderr, "\t--%s%s\n", long_options[i].name, option_parameters);
+  }
 
-}
-
-void print_help(const struct option* long_options, int num_opts, char* argv[])
-{
-	int i;
-	char *option_parameters;
-
-	fprintf(stderr, "\nCodec2 - low bit rate speech codec - Simulation Program\n"
-		"\thttp://rowetel.com/codec2.html\n\n"
-		"usage: %s [OPTIONS] <InputFile>\n\n"
-                "Options:\n"
-                "\t-o <OutputFile>\n", argv[0]);
-        for(i=0; i<num_opts-1; i++) {
-		if(long_options[i].has_arg == no_argument) {
-			option_parameters="";
-		} else if (strcmp("lpc", long_options[i].name) == 0) {
-			option_parameters = " <Order>";
-		} else if (strcmp("dec", long_options[i].name) == 0) {
-			option_parameters = " <2|4>";
-		} else if (strcmp("hand_voicing", long_options[i].name) == 0) {
-			option_parameters = " <VoicingFile>";
-		} else if (strcmp("dump_pitch_e", long_options[i].name) == 0) {
-			option_parameters = " <Dump File>";
-		} else if (strcmp("rate", long_options[i].name) == 0) {
-			option_parameters = " <3200|2400|1400|1300|1200>";
-		} else if (strcmp("dump", long_options[i].name) == 0) {
-			option_parameters = " <DumpFilePrefix>";
-		} else {
-			option_parameters = " <UNDOCUMENTED parameter>";
-		}
-		fprintf(stderr, "\t--%s%s\n", long_options[i].name, option_parameters);
-	}
-
-	exit(1);
+  exit(1);
 }