first commit

2022-10-20 20:29:11 +08:00
commit 4d531f8044
3238 changed files with 1387862 additions and 0 deletions
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+#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 <unistd.h>
+#include "speex/speex_echo.h"
+#include "speex/speex_preprocess.h"
+
+
+#define NN 160
+
+int main()
+{
+   int echo_fd, ref_fd, e_fd;
+   float noise[NN+1];
+   short echo_buf[NN], ref_buf[NN], e_buf[NN];
+   SpeexEchoState *st;
+   SpeexPreprocessState *den;
+
+   echo_fd = open ("play.sw", O_RDONLY);
+   ref_fd  = open ("rec.sw",  O_RDONLY);
+   e_fd    = open ("echo.sw", O_WRONLY | O_CREAT | O_TRUNC, 0644);
+
+   st = speex_echo_state_init(NN, 8*NN);
+   den = speex_preprocess_state_init(NN, 8000);
+
+   while (read(ref_fd, ref_buf, NN*2))
+   {
+      read(echo_fd, echo_buf, NN*2);
+      speex_echo_cancel(st, ref_buf, echo_buf, e_buf, noise);
+      speex_preprocess(den, e_buf, noise);
+      write(e_fd, e_buf, NN*2);
+   }
+   speex_echo_state_destroy(st);
+   speex_preprocess_state_destroy(den);
+   close(e_fd);
+   close(echo_fd);
+   close(ref_fd);
+   return 0;
+}