checkasm: add alacdsp tests

Signed-off-by: James Almer <jamrial@gmail.com>

tests/checkasm/Makefile

 # libavcodec tests
+AVCODECOBJS-$(CONFIG_ALAC_DECODER) += alacdsp.o
 AVCODECOBJS-$(CONFIG_BSWAPDSP) += bswapdsp.o
 AVCODECOBJS-$(CONFIG_FLACDSP)  += flacdsp.o
 AVCODECOBJS-$(CONFIG_H264PRED) += h264pred.o

tests/checkasm/alacdsp.c

+/*
+ * Copyright (c) 2015 James Almer
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <string.h>
+#include "checkasm.h"
+#include "libavcodec/alacdsp.h"
+#include "libavcodec/mathops.h"
+#include "libavutil/common.h"
+#include "libavutil/internal.h"
+
+#define BUF_SIZE 256
+#define MAX_CHANNELS 2
+
+#define randomize_buffers()                           \
+    do {                                              \
+        int i;                                        \
+        for (i = 0; i < BUF_SIZE*MAX_CHANNELS; i++) { \
+            int32_t r = sign_extend(rnd(), 24);       \
+            ref_buf[i] = r;                           \
+            new_buf[i] = r;                           \
+        }                                             \
+    } while (0)
+
+static void check_decorrelate_stereo(void)
+{
+    LOCAL_ALIGNED_16(int32_t, ref_buf, [BUF_SIZE*MAX_CHANNELS]);
+    LOCAL_ALIGNED_16(int32_t, new_buf, [BUF_SIZE*MAX_CHANNELS]);
+    int32_t *ref[2] = { &ref_buf[BUF_SIZE*0], &ref_buf[BUF_SIZE*1] };
+    int32_t *new[2] = { &new_buf[BUF_SIZE*0], &new_buf[BUF_SIZE*1] };
+    ALACDSPContext c;
+
+    ff_alacdsp_init(&c);
+    if (check_func(c.decorrelate_stereo, "alac_decorrelate_stereo")) {
+        int len    = (rnd() & 0xFF) + 1;
+        int shift  =  rnd() & 0x1F;
+        int weight =  rnd() & 0xFF;
+        declare_func(void, int32_t *buf[2], int len, int shift, int weight);
+
+        randomize_buffers();
+        call_ref(ref, len, shift, weight);
+        call_new(new, len, shift, weight);
+        if (memcmp(ref[0], new[0], len * sizeof(int32_t)) ||
+            memcmp(ref[1], new[1], len * sizeof(int32_t)))
+            fail();
+        bench_new(new, BUF_SIZE, shift, weight);
+    }
+
+    report("decorrelate_stereo");
+}
+
+#undef randomize_buffers
+#define randomize_buffers()                           \
+    do {                                              \
+        int i, j;                                     \
+        for (i = 0; i < BUF_SIZE; i++) {              \
+            for (j = 0; j < ch; j++) {                \
+                int32_t r = sign_extend(rnd(), 24);   \
+                ref[j][i] = r;                        \
+                new[j][i] = r;                        \
+                r = rnd() & 0xFF;                     \
+                ref_ebb[j][i] = r;                    \
+                new_ebb[j][i] = r;                    \
+            }                                         \
+        }                                             \
+    } while (0)
+
+static void check_append_extra_bits(void)
+{
+    LOCAL_ALIGNED_16(int32_t, ref_buf, [BUF_SIZE*MAX_CHANNELS*2]);
+    LOCAL_ALIGNED_16(int32_t, new_buf, [BUF_SIZE*MAX_CHANNELS*2]);
+    int32_t *ref[2]     = { &ref_buf[BUF_SIZE*0], &ref_buf[BUF_SIZE*1] };
+    int32_t *new[2]     = { &new_buf[BUF_SIZE*0], &new_buf[BUF_SIZE*1] };
+    int32_t *ref_ebb[2] = { &ref_buf[BUF_SIZE*2], &ref_buf[BUF_SIZE*3] };
+    int32_t *new_ebb[2] = { &new_buf[BUF_SIZE*2], &new_buf[BUF_SIZE*3] };
+    ALACDSPContext c;
+    static const char * const channels[2] = { "mono", "stereo" };
+    int ch;
+
+    ff_alacdsp_init(&c);
+    for (ch = 1; ch <= 2; ch++) {
+        if (check_func(c.append_extra_bits[ch-1], "alac_append_extra_bits_%s", channels[ch-1])) {
+            int len    = (rnd() & 0xFF) + 1;
+            declare_func(void, int32_t *buf[2], int32_t *ebb[2], int ebits, int ch, int len);
+
+            randomize_buffers();
+            call_ref(ref, ref_ebb, 8, ch, len);
+            call_new(new, new_ebb, 8, ch, len);
+            if (            memcmp(ref[0], new[0], len * sizeof(int32_t)) ||
+                (ch == 2 && memcmp(ref[1], new[1], len * sizeof(int32_t))))
+                fail();
+            bench_new(new, new_ebb, 8, ch, BUF_SIZE);
+        }
+    }
+
+    report("append_extra_bits");
+}
+
+void checkasm_check_alacdsp(void)
+{
+    check_decorrelate_stereo();
+    check_append_extra_bits();
+}

tests/checkasm/checkasm.c

@@ -58,6 +58,9 @@ static const struct {
     void (*func)(void);
 } tests[] = {
 #if CONFIG_AVCODEC
+    #if CONFIG_ALAC_DECODER
+        { "alacdsp", checkasm_check_alacdsp },
+    #endif
     #if CONFIG_BSWAPDSP
         { "bswapdsp", checkasm_check_bswapdsp },
     #endif

tests/checkasm/checkasm.h

@@ -29,6 +29,7 @@
 #include "libavutil/lfg.h"
 #include "libavutil/timer.h"
 
+void checkasm_check_alacdsp(void);
 void checkasm_check_bswapdsp(void);
 void checkasm_check_flacdsp(void);
 void checkasm_check_h264pred(void);