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, 65 insertions, 0 deletions

diff --git a/third_party/aom/y4menc.c b/third_party/aom/y4menc.c
new file mode 100644
index 000000000..b094f74fe
--- /dev/null
+++ b/third_party/aom/y4menc.c
@@ -0,0 +1,65 @@
+/*
+ * 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.
+ */
+
+#include <assert.h>
+#include "./y4menc.h"
+
+int y4m_write_file_header(char *buf, size_t len, int width, int height,
+                          const struct AvxRational *framerate,
+                          aom_img_fmt_t fmt, unsigned int bit_depth) {
+  const char *color;
+  switch (bit_depth) {
+    case 8:
+      color = fmt == AOM_IMG_FMT_444A
+                  ? "C444alpha\n"
+                  : fmt == AOM_IMG_FMT_I444
+                        ? "C444\n"
+                        : fmt == AOM_IMG_FMT_I422 ? "C422\n" : "C420jpeg\n";
+      break;
+    case 9:
+      color = fmt == AOM_IMG_FMT_I44416
+                  ? "C444p9 XYSCSS=444P9\n"
+                  : fmt == AOM_IMG_FMT_I42216 ? "C422p9 XYSCSS=422P9\n"
+                                              : "C420p9 XYSCSS=420P9\n";
+      break;
+    case 10:
+      color = fmt == AOM_IMG_FMT_I44416
+                  ? "C444p10 XYSCSS=444P10\n"
+                  : fmt == AOM_IMG_FMT_I42216 ? "C422p10 XYSCSS=422P10\n"
+                                              : "C420p10 XYSCSS=420P10\n";
+      break;
+    case 12:
+      color = fmt == AOM_IMG_FMT_I44416
+                  ? "C444p12 XYSCSS=444P12\n"
+                  : fmt == AOM_IMG_FMT_I42216 ? "C422p12 XYSCSS=422P12\n"
+                                              : "C420p12 XYSCSS=420P12\n";
+      break;
+    case 14:
+      color = fmt == AOM_IMG_FMT_I44416
+                  ? "C444p14 XYSCSS=444P14\n"
+                  : fmt == AOM_IMG_FMT_I42216 ? "C422p14 XYSCSS=422P14\n"
+                                              : "C420p14 XYSCSS=420P14\n";
+      break;
+    case 16:
+      color = fmt == AOM_IMG_FMT_I44416
+                  ? "C444p16 XYSCSS=444P16\n"
+                  : fmt == AOM_IMG_FMT_I42216 ? "C422p16 XYSCSS=422P16\n"
+                                              : "C420p16 XYSCSS=420P16\n";
+      break;
+    default: color = NULL; assert(0);
+  }
+  return snprintf(buf, len, "YUV4MPEG2 W%u H%u F%u:%u I%c %s", width, height,
+                  framerate->numerator, framerate->denominator, 'p', color);
+}
+
+int y4m_write_frame_header(char *buf, size_t len) {
+  return snprintf(buf, len, "FRAME\n");
+}