fifo: add FIFO API test program, and fate test

Signed-off-by: Anton Khirnov <anton@khirnov.net>

libavutil/Makefile

@@ -75,7 +75,7 @@ OBJS-$(ARCH_ARM) += arm/cpu.o
 OBJS-$(ARCH_PPC) += ppc/cpu.o
 OBJS-$(ARCH_X86) += x86/cpu.o
 
-TESTPROGS = adler32 aes avstring base64 cpu crc des eval file lfg lls \
+TESTPROGS = adler32 aes avstring base64 cpu crc des eval file fifo lfg lls \
             md5 opt parseutils rational sha tree
 TESTPROGS-$(HAVE_LZO1X_999_COMPRESS) += lzo
 

libavutil/fifo.c

@@ -127,3 +127,39 @@ void av_fifo_drain(AVFifoBuffer *f, int size)
         f->rptr -= f->end - f->buffer;
     f->rndx += size;
 }
+
+#ifdef TEST
+
+#undef printf
+
+int main(void)
+{
+    /* create a FIFO buffer */
+    AVFifoBuffer *fifo = av_fifo_alloc(13 * sizeof(int));
+    int i, j, n;
+
+    /* fill data */
+    for (i = 0; av_fifo_space(fifo) >= sizeof(int); i++)
+        av_fifo_generic_write(fifo, &i, sizeof(int), NULL);
+
+    /* peek at FIFO */
+    n = av_fifo_size(fifo)/sizeof(int);
+    for (i = -n+1; i < n; i++) {
+        int *v = (int *)av_fifo_peek2(fifo, i*sizeof(int));
+        printf("%d: %d\n", i, *v);
+    }
+    printf("\n");
+
+    /* read data */
+    for (i = 0; av_fifo_size(fifo) >= sizeof(int); i++) {
+        av_fifo_generic_read(fifo, &j, sizeof(int), NULL);
+        printf("%d ", j);
+    }
+    printf("\n");
+
+    av_fifo_free(fifo);
+
+    return 0;
+}
+
+#endif

tests/fate/libavutil.mak

@@ -25,6 +25,10 @@ FATE_TESTS += fate-eval
 fate-eval: libavutil/eval-test$(EXESUF)
 fate-eval: CMD = run libavutil/eval-test
 
+FATE_TESTS += fate-fifo
+fate-fifo: libavutil/fifo-test$(EXESUF)
+fate-fifo: CMD = run libavutil/fifo-test
+
 FATE_TESTS += fate-md5
 fate-md5: libavutil/md5-test$(EXESUF)
 fate-md5: CMD = run libavutil/md5-test

tests/ref/fate/fifo

@@ -0,0 +1,27 @@
+-12: 1
+-11: 2
+-10: 3
+-9: 4
+-8: 5
+-7: 6
+-6: 7
+-5: 8
+-4: 9
+-3: 10
+-2: 11
+-1: 12
+0: 0
+1: 1
+2: 2
+3: 3
+4: 4
+5: 5
+6: 6
+7: 7
+8: 8
+9: 9
+10: 10
+11: 11
+12: 12
+
+0 1 2 3 4 5 6 7 8 9 10 11 12