Adds support for reading and writing 10/12-bit y4m

The y4m extension used is the same as the one used in ffmpeg/x264.
The patch is adapted from the highbitdepth branch.

Also adds unit tests for y4m header parsing and md5 check
of the raw frame data, as well as y4m writing.

[build fix for Mac/VS by not using tuples with strings]

Change-Id: I40897ee37d289e4b6cea6fedc67047d692b8cb46

1 files changed, 38 insertions, 6 deletions

diff --git a/y4menc.c b/y4menc.c
index 8b1c95e2b..9211452a4 100644
--- a/y4menc.c
+++ b/y4menc.c
@@ -8,16 +8,48 @@
  *  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) {
-  const char *const color = fmt == VPX_IMG_FMT_444A ? "C444alpha\n" :
-                            fmt == VPX_IMG_FMT_I444 ? "C444\n" :
-                            fmt == VPX_IMG_FMT_I422 ? "C422\n" :
-                            "C420jpeg\n";
-
+                          vpx_img_fmt_t fmt, unsigned int bit_depth) {
+  const char *color;
+  switch (bit_depth) {
+    case 8:
+      color = fmt == VPX_IMG_FMT_444A ? "C444alpha\n" :
+              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:
+      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);
 }