[FFmpeg-devel] [PATCHv4 3/4] checkasm/h263dsp: test dct_unquantize_{intra, inter}

["Rémi Denis-Courmont" <remi@remlab.net>]

---
 tests/checkasm/h263dsp.c | 53 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 52 insertions(+), 1 deletion(-)

diff --git a/tests/checkasm/h263dsp.c b/tests/checkasm/h263dsp.c
index 2d0957a90b..a8530403ee 100644
--- a/tests/checkasm/h263dsp.c
+++ b/tests/checkasm/h263dsp.c
@@ -18,13 +18,61 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
+#include <stdbool.h>
 #include <string.h>
 
 #include "checkasm.h"
 
-#include "libavcodec/h263dsp.h"
+#include "libavutil/avassert.h"
 #include "libavutil/mem.h"
 #include "libavutil/mem_internal.h"
+#include "libavcodec/h263dsp.h"
+#include "libavcodec/mpegvideodata.h"
+
+static uint_fast8_t mpeg_qscale_rnd(void)
+{
+    int n = rnd(), q = (n >> 1) & 31;
+
+    if (n & 1)
+        return ff_mpeg2_non_linear_qscale[q];
+    else
+        return q << 1;
+}
+
+typedef void (*unquantizer)(int16_t *, size_t, int, int);
+
+static void check_dct_unquantize(unquantizer func, const char *name)
+{
+#define LEN 64
+    LOCAL_ALIGNED_16(int16_t, block0, [LEN]);
+    LOCAL_ALIGNED_16(int16_t, block1, [LEN]);
+    size_t coeffs = rnd() % LEN;
+    const int qscale = mpeg_qscale_rnd();
+    const int qmul = qscale << 1;
+    const int qadd = (rnd() & 1) ? (qscale - 1) | 1 : 0;
+
+    declare_func(void, int16_t *, size_t, int, int);
+
+    for (size_t i = 0; i < LEN; i++)
+        block1[i] = block0[i] = (rnd() & 1) ? rnd() : 0;
+
+    if (check_func(func, "h263dsp.dct_unquantize_%s", name)) {
+        call_ref(block0, 0, qmul, qadd);
+        call_new(block1, 0, qmul, qadd);
+
+        if (block0[0] != block1[0])
+            fail();
+
+        av_assert0(coeffs < LEN);
+        call_ref(block0, coeffs, qmul, qadd);
+        call_new(block1, coeffs, qmul, qadd);
+
+        if (memcmp(block0, block1, (coeffs + 1) * sizeof (int16_t)))
+            fail();
+
+        bench_new(block1, LEN - 1, qmul, qadd);
+    }
+}
 
 typedef void (*filter)(uint8_t *src, int stride, int qscale);
 
@@ -56,6 +104,9 @@ void checkasm_check_h263dsp(void)
     H263DSPContext ctx;
 
     ff_h263dsp_init(&ctx);
+    check_dct_unquantize(ctx.h263_dct_unquantize_intra, "intra");
+    check_dct_unquantize(ctx.h263_dct_unquantize_inter, "inter");
+    report("dct_unquantize");
     check_loop_filter('h', ctx.h263_h_loop_filter);
     check_loop_filter('v', ctx.h263_v_loop_filter);
     report("loop_filter");
-- 
2.45.1

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