1 files changed, 57 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/y4menc.c b/media/libvpx/libvpx/y4menc.c
new file mode 100644
index 0000000000..1877981279
--- /dev/null
+++ b/media/libvpx/libvpx/y4menc.c
@@ -0,0 +1,57 @@
+/*
+ *  Copyright (c) 2014 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <assert.h>
+#include "./y4menc.h"
+
+int y4m_write_file_header(char *buf, size_t len, int width, int height,
+                          const struct VpxRational *framerate,
+                          vpx_img_fmt_t fmt, unsigned int bit_depth) {
+  const char *color;
+  switch (bit_depth) {
+    case 8:
+      color = fmt == VPX_IMG_FMT_I444   ? "C444\n"
+              : fmt == VPX_IMG_FMT_I422 ? "C422\n"
+                                        : "C420jpeg\n";
+      break;
+    case 9:
+      color = fmt == VPX_IMG_FMT_I44416   ? "C444p9 XYSCSS=444P9\n"
+              : fmt == VPX_IMG_FMT_I42216 ? "C422p9 XYSCSS=422P9\n"
+                                          : "C420p9 XYSCSS=420P9\n";
+      break;
+    case 10:
+      color = fmt == VPX_IMG_FMT_I44416   ? "C444p10 XYSCSS=444P10\n"
+              : fmt == VPX_IMG_FMT_I42216 ? "C422p10 XYSCSS=422P10\n"
+                                          : "C420p10 XYSCSS=420P10\n";
+      break;
+    case 12:
+      color = fmt == VPX_IMG_FMT_I44416   ? "C444p12 XYSCSS=444P12\n"
+              : fmt == VPX_IMG_FMT_I42216 ? "C422p12 XYSCSS=422P12\n"
+                                          : "C420p12 XYSCSS=420P12\n";
+      break;
+    case 14:
+      color = fmt == VPX_IMG_FMT_I44416   ? "C444p14 XYSCSS=444P14\n"
+              : fmt == VPX_IMG_FMT_I42216 ? "C422p14 XYSCSS=422P14\n"
+                                          : "C420p14 XYSCSS=420P14\n";
+      break;
+    case 16:
+      color = fmt == VPX_IMG_FMT_I44416   ? "C444p16 XYSCSS=444P16\n"
+              : fmt == VPX_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");
+}