Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

1 files changed, 111 insertions, 0 deletions

diff --git a/third_party/aom/aom_ports/aom_timer.h b/third_party/aom/aom_ports/aom_timer.h
new file mode 100644
index 000000000..904f2fe51
--- /dev/null
+++ b/third_party/aom/aom_ports/aom_timer.h
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#ifndef AOM_PORTS_AOM_TIMER_H_
+#define AOM_PORTS_AOM_TIMER_H_
+
+#include "./aom_config.h"
+
+#include "aom/aom_integer.h"
+
+#if CONFIG_OS_SUPPORT
+
+#if defined(_WIN32)
+/*
+ * Win32 specific includes
+ */
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+#else
+/*
+ * POSIX specific includes
+ */
+#include <sys/time.h>
+
+/* timersub is not provided by msys at this time. */
+#ifndef timersub
+#define timersub(a, b, result)                       \
+  do {                                               \
+    (result)->tv_sec = (a)->tv_sec - (b)->tv_sec;    \
+    (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
+    if ((result)->tv_usec < 0) {                     \
+      --(result)->tv_sec;                            \
+      (result)->tv_usec += 1000000;                  \
+    }                                                \
+  } while (0)
+#endif
+#endif
+
+struct aom_usec_timer {
+#if defined(_WIN32)
+  LARGE_INTEGER begin, end;
+#else
+  struct timeval begin, end;
+#endif
+};
+
+static INLINE void aom_usec_timer_start(struct aom_usec_timer *t) {
+#if defined(_WIN32)
+  QueryPerformanceCounter(&t->begin);
+#else
+  gettimeofday(&t->begin, NULL);
+#endif
+}
+
+static INLINE void aom_usec_timer_mark(struct aom_usec_timer *t) {
+#if defined(_WIN32)
+  QueryPerformanceCounter(&t->end);
+#else
+  gettimeofday(&t->end, NULL);
+#endif
+}
+
+static INLINE int64_t aom_usec_timer_elapsed(struct aom_usec_timer *t) {
+#if defined(_WIN32)
+  LARGE_INTEGER freq, diff;
+
+  diff.QuadPart = t->end.QuadPart - t->begin.QuadPart;
+
+  QueryPerformanceFrequency(&freq);
+  return diff.QuadPart * 1000000 / freq.QuadPart;
+#else
+  struct timeval diff;
+
+  timersub(&t->end, &t->begin, &diff);
+  return diff.tv_sec * 1000000 + diff.tv_usec;
+#endif
+}
+
+#else /* CONFIG_OS_SUPPORT = 0*/
+
+/* Empty timer functions if CONFIG_OS_SUPPORT = 0 */
+#ifndef timersub
+#define timersub(a, b, result)
+#endif
+
+struct aom_usec_timer {
+  void *dummy;
+};
+
+static INLINE void aom_usec_timer_start(struct aom_usec_timer *t) { (void)t; }
+
+static INLINE void aom_usec_timer_mark(struct aom_usec_timer *t) { (void)t; }
+
+static INLINE int aom_usec_timer_elapsed(struct aom_usec_timer *t) {
+  (void)t;
+  return 0;
+}
+
+#endif /* CONFIG_OS_SUPPORT */
+
+#endif  // AOM_PORTS_AOM_TIMER_H_