[FFmpeg-devel] [PATCHv2 1/1] checkasm/lpc: test compute_autocorr

[Rémi Denis-Courmont]

---
 tests/checkasm/lpc.c | 47 ++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 45 insertions(+), 2 deletions(-)

diff --git a/tests/checkasm/lpc.c b/tests/checkasm/lpc.c
index 592e34c03d..9b33f8a3b0 100644
--- a/tests/checkasm/lpc.c
+++ b/tests/checkasm/lpc.c
@@ -57,10 +57,46 @@ static void test_window(int len)
     bench_new(src, len, dst1);
 }
 
+static void test_compute_autocorr(ptrdiff_t len, int lag)
+{
+    LOCAL_ALIGNED(32, double, src, [5000 + 2 + MAX_LPC_ORDER]);
+    LOCAL_ALIGNED(16, double, dst0, [MAX_LPC_ORDER + 1]);
+    LOCAL_ALIGNED(16, double, dst1, [MAX_LPC_ORDER + 1]);
+
+    declare_func(void, const double *in, ptrdiff_t len, int lag, double *out);
+
+    av_assert0(lag >= 0 && lag <= MAX_LPC_ORDER);
+
+    for (int i = 0; i < MAX_LPC_ORDER; i++)
+        src[i] = 0.;
+
+    src += MAX_LPC_ORDER;
+
+    for (ptrdiff_t i = 0; i < len; i++) {
+        src[i] = (double)rnd() / (double)UINT_MAX;
+    }
+
+    call_ref(src, len, lag, dst0);
+    call_new(src, len, lag, dst1);
+
+    for (size_t i = 0; i < lag; i++) {
+        if (!double_near_abs_eps(dst0[i], dst1[i], EPS)) {
+            fprintf(stderr, "%zu: %- .12f - %- .12f = % .12g\n",
+                    i, dst0[i], dst1[i], dst0[i] - dst1[i]);
+            fail();
+            break;
+        }
+    }
+
+    bench_new(src, len, lag, dst1);
+}
+
 void checkasm_check_lpc(void)
 {
     LPCContext ctx;
-    int len = rnd() % 5000;
+    int len = 2000 + (rnd() % 3000);
+    static const int lags[] = { 10, 30, 32 };
+
     ff_lpc_init(&ctx, 32, 16, FF_LPC_TYPE_DEFAULT);
 
     if (check_func(ctx.lpc_apply_welch_window, "apply_welch_window_even")) {
@@ -72,6 +108,13 @@ void checkasm_check_lpc(void)
         test_window(len | 1);
     }
     report("apply_welch_window_odd");
-
     ff_lpc_end(&ctx);
+
+    for (size_t i = 0; i < FF_ARRAY_ELEMS(lags); i++) {
+        ff_lpc_init(&ctx, len, lags[i], FF_LPC_TYPE_DEFAULT);
+        if (check_func(ctx.lpc_compute_autocorr, "autocorr_%d", lags[i]))
+            test_compute_autocorr(len, lags[i]);
+        report("compute_autocorr_%d", lags[i]);
+        ff_lpc_end(&ctx);
+    }
 }
-- 
2.43.0