Added libspeex to revision control, and updated Makefile to use it.

code/libspeex/testecho.c

@@ -0,0 +1,53 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include "speex/speex_echo.h"
+#include "speex/speex_preprocess.h"
+
+
+#define NN 128
+#define TAIL 1024
+
+int main(int argc, char **argv)
+{
+   FILE *echo_fd, *ref_fd, *e_fd;
+   short echo_buf[NN], ref_buf[NN], e_buf[NN];
+   SpeexEchoState *st;
+   SpeexPreprocessState *den;
+   int sampleRate = 8000;
+
+   if (argc != 4)
+   {
+      fprintf(stderr, "testecho mic_signal.sw speaker_signal.sw output.sw\n");
+      exit(1);
+   }
+   echo_fd = fopen(argv[2], "rb");
+   ref_fd  = fopen(argv[1],  "rb");
+   e_fd    = fopen(argv[3], "wb");
+
+   st = speex_echo_state_init(NN, TAIL);
+   den = speex_preprocess_state_init(NN, sampleRate);
+   speex_echo_ctl(st, SPEEX_ECHO_SET_SAMPLING_RATE, &sampleRate);
+   speex_preprocess_ctl(den, SPEEX_PREPROCESS_SET_ECHO_STATE, st);
+
+   while (!feof(ref_fd) && !feof(echo_fd))
+   {
+      fread(ref_buf, sizeof(short), NN, ref_fd);
+      fread(echo_buf, sizeof(short), NN, echo_fd);
+      speex_echo_cancellation(st, ref_buf, echo_buf, e_buf);
+      speex_preprocess_run(den, e_buf);
+      fwrite(e_buf, sizeof(short), NN, e_fd);
+   }
+   speex_echo_state_destroy(st);
+   speex_preprocess_state_destroy(den);
+   fclose(e_fd);
+   fclose(echo_fd);
+   fclose(ref_fd);
+   return 0;
+}