Add speaker C demo

c/Makefile

@@ -22,9 +22,14 @@ LIBS= \
 	$(KALDI_ROOT)/tools/openfst/lib/libfst.a \
 	$(KALDI_ROOT)/tools/openfst/lib/libfstngram.a
 
+all: test_vosk test_vosk_speaker
+
 test_vosk: test_vosk.o libvosk.a
 	g++ $^ -o $@ $(LIBS) -lgfortran -lpthread
 
+test_vosk_speaker: test_vosk_speaker.o libvosk.a
+	g++ $^ -o $@ $(LIBS) -lgfortran -lpthread
+
 libvosk.a: $(VOSK_SOURCES:.cc=.o)
 	ar rcs $@ $^
 

c/test_vosk_speaker.c

@@ -0,0 +1,30 @@
+#include <vosk_api.h>
+#include <stdio.h>
+
+int main() {
+    FILE *wavin;
+    char buf[3200];
+    int nread, final;
+
+    VoskModel *model = vosk_model_new("model");
+    VoskSpkModel *spk_model = vosk_spk_model_new("spk-model");
+    VoskRecognizer *recognizer = vosk_recognizer_new_spk(model, spk_model, 16000.0);
+
+    wavin = fopen("test.wav", "rb");
+    fseek(wavin, 44, SEEK_SET);
+    while (!feof(wavin)) {
+         nread = fread(buf, 1, sizeof(buf), wavin);
+         final = vosk_recognizer_accept_waveform(recognizer, buf, nread);
+         if (final) {
+             printf("%s\n", vosk_recognizer_result(recognizer));
+         } else {
+             printf("%s\n", vosk_recognizer_partial_result(recognizer));
+         }
+    }
+    printf("%s\n", vosk_recognizer_final_result(recognizer));
+
+    vosk_recognizer_free(recognizer);
+    vosk_spk_model_free(spk_model);
+    vosk_model_free(model);
+    return 0;
+}