build: Split test programs off into separate files

This avoids spurious library rebuilds when only the test program
code is changed and simplifies the build system.

libavcodec/rangecoder-test.c

@@ -0,0 +1,64 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <stdint.h>
+#include <string.h>
+
+#include "libavutil/lfg.h"
+#include "libavutil/log.h"
+
+#include "rangecoder.h"
+
+#define SIZE 10240
+
+int main(void)
+{
+    RangeCoder c;
+    uint8_t b[9 * SIZE];
+    uint8_t r[9 * SIZE];
+    int i;
+    uint8_t state[10];
+    AVLFG prng;
+
+    av_lfg_init(&prng, 1);
+
+    ff_init_range_encoder(&c, b, SIZE);
+    ff_build_rac_states(&c, 0.05 * (1LL << 32), 128 + 64 + 32 + 16);
+
+    memset(state, 128, sizeof(state));
+
+    for (i = 0; i < SIZE; i++)
+        r[i] = av_lfg_get(&prng) % 7;
+
+    for (i = 0; i < SIZE; i++)
+        put_rac(&c, state, r[i] & 1);
+
+    ff_rac_terminate(&c);
+
+    ff_init_range_decoder(&c, b, SIZE);
+
+    memset(state, 128, sizeof(state));
+
+    for (i = 0; i < SIZE; i++)
+        if ((r[i] & 1) != get_rac(&c, state)) {
+            av_log(NULL, AV_LOG_ERROR, "rac failure at %d\n", i);
+            return 1;
+        }
+
+    return 0;
+}