Use the libspeexdsp resampler

AFAICT it runs a little slower? but it's fixed point, and has much better understood audio characteristics.
2023-08-10 19:12:38 +10:00
parent d8fc77101d
commit 958160aa54
163 changed files with 77244 additions and 253 deletions
@@ -0,0 +1,44 @@
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "speex/speex_preprocess.h"
+#include <stdio.h>
+
+#define NN 160
+
+int main()
+{
+   short in[NN];
+   int i;
+   SpeexPreprocessState *st;
+   int count=0;
+   float f;
+
+   st = speex_preprocess_state_init(NN, 8000);
+   i=1;
+   speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_DENOISE, &i);
+   i=0;
+   speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_AGC, &i);
+   i=8000;
+   speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_AGC_LEVEL, &i);
+   i=0;
+   speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_DEREVERB, &i);
+   f=.0;
+   speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_DEREVERB_DECAY, &f);
+   f=.0;
+   speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_DEREVERB_LEVEL, &f);
+   while (1)
+   {
+      int vad;
+      fread(in, sizeof(short), NN, stdin);
+      if (feof(stdin))
+         break;
+      vad = speex_preprocess_run(st, in);
+      /*fprintf (stderr, "%d\n", vad);*/
+      fwrite(in, sizeof(short), NN, stdout);
+      count++;
+   }
+   speex_preprocess_state_destroy(st);
+   return 0;
+}