Enable BPF/clipping for 700D.

Author: tmiw

src/freedv_700.c

@@ -140,12 +140,6 @@ void freedv_ofdm_voice_open(struct freedv *f, char *mode) {
 
     f->tx_bits = NULL; /* not used for 700D */
 
-    /* tx BPF off on embedded platforms for 700D, as it consumes significant CPU */
-#ifdef __EMBEDDED__
-    if (strcmp(mode, "700E") != 0)
-        ofdm_set_tx_bpf(f->ofdm, 0);
-#endif
-
     f->speech_sample_rate = FREEDV_FS_8000;
     f->codec2 = codec2_create(CODEC2_MODE_700C); assert(f->codec2 != NULL);
     /* should be exactly an integer number of Codec 2 frames in a OFDM modem frame */

stm32/src/sm1000_main.c

@@ -305,6 +305,11 @@ struct freedv *set_freedv_mode(int op_mode, int *n_samples) {
         freedv_set_snr_squelch_thresh(f, -2.0);  /* squelch at -2.0 dB      */
         freedv_set_squelch_en(f, 1);
         freedv_set_eq(f, 1);                     /* equaliser on by default */
+        
+        /* Clipping and TXBPF nice to have for 700D. */
+        freedv_set_clip(f, 1);
+        freedv_set_tx_bpf(f, 1);
+        
         *n_samples = freedv_get_n_speech_samples(f);
         break;
     case DV700E: