From: Paul Brossier <piem@piem.org>
Date: Thu, 29 Sep 2016 11:24:42 +0000 (+0200)
Subject: tests/src/effects/test-timestretch.c: add example for aubio_timestretch_t
X-Git-Url: https://git.aubio.org/?a=commitdiff_plain;h=24914e1839618051db9507b9f43956ef29af8c0f;p=aubio.git

tests/src/effects/test-timestretch.c: add example for aubio_timestretch_t
---

diff --git a/tests/src/effects/test-timestretch.c b/tests/src/effects/test-timestretch.c
new file mode 100644
index 00000000..e13e0b02
--- /dev/null
+++ b/tests/src/effects/test-timestretch.c
@@ -0,0 +1,73 @@
+#define AUBIO_UNSTABLE 1
+#include <aubio.h>
+#include "utils_tests.h"
+
+int main (int argc, char **argv)
+{
+  sint_t err = 0;
+
+  if (argc < 4) {
+    err = 2;
+    PRINT_ERR("not enough arguments\n");
+    PRINT_MSG("usage: %s <input_path> <output_path> <stretch> [transpose] [mode] [hop_size] [samplerate]\n", argv[0]);
+    PRINT_MSG(" with <stretch> a time stretching ratio in the range [0.025, 10.]\n");
+    PRINT_MSG("      [transpose] a number of semi tones in the range [-24, 24]\n");
+    PRINT_MSG("  and [mode] in 'default', 'crispness:0', ..., 'crispness:6'\n");
+    return err;
+  }
+
+  uint_t samplerate = 0;
+  uint_t hop_size = 64;
+  smpl_t transpose = 0.;
+  smpl_t stretch = 1.;
+  uint_t n_frames = 0, read = 0;
+
+  char_t *source_path = argv[1];
+  char_t *sink_path = argv[2];
+  char_t *mode = "default";
+
+  stretch = atof(argv[3]);
+
+  if ( argc >= 5 ) transpose = atof(argv[4]);
+  if ( argc >= 6 ) mode = argv[5];
+  if ( argc >= 7 ) hop_size = atoi(argv[6]);
+  if ( argc >= 8 ) samplerate = atoi(argv[7]);
+  if ( argc >= 9 ) {
+    err = 2;
+    PRINT_ERR("too many arguments\n");
+    return err;
+  }
+
+  fvec_t *out = new_fvec(hop_size);
+  if (!out) { err = 1; goto beach_fvec; }
+
+  aubio_timestretch_t *ps = new_aubio_timestretch(source_path, mode,
+      stretch, hop_size, samplerate);
+  if (!ps) { err = 1; goto beach_timestretch; }
+  if (samplerate == 0 ) samplerate = aubio_timestretch_get_samplerate(ps);
+
+  aubio_sink_t *o = new_aubio_sink(sink_path, samplerate);
+  if (!o) { err = 1; goto beach_sink; }
+
+  if (transpose != 0) aubio_timestretch_set_transpose(ps, transpose);
+
+  do {
+    aubio_timestretch_set_stretch(ps, stretch);
+    aubio_timestretch_set_transpose(ps, transpose);
+    aubio_timestretch_do(ps, out, &read);
+    aubio_sink_do(o, out, read);
+    n_frames += read;
+  } while ( read == hop_size );
+
+  PRINT_MSG("wrote %d frames at %dHz (%d blocks) from %s written to %s\n",
+      n_frames, samplerate, n_frames / hop_size,
+      source_path, sink_path);
+
+  del_aubio_sink(o);
+beach_sink:
+  del_aubio_timestretch(ps);
+beach_timestretch:
+  del_fvec(out);
+beach_fvec:
+  return err;
+}