libvpx: Pull from upstream

source/libvpx/tools_common.c

Index: source/libvpx/tools_common.c
===================================================================
--- source/libvpx/tools_common.c	(revision 240950)
+++ source/libvpx/tools_common.c	(working copy)
@@ -7,8 +7,14 @@
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
+
+#include "tools_common.h"
+
+#include <stdarg.h>
 #include <stdio.h>
-#include "tools_common.h"
+#include <stdlib.h>
+#include <string.h>
+
 #if defined(_WIN32) || defined(__OS2__)
 #include <io.h>
 #include <fcntl.h>
@@ -20,6 +26,18 @@
 #endif
 #endif
 
+#define LOG_ERROR(label) do {\
+  const char *l = label;\
+  va_list ap;\
+  va_start(ap, fmt);\
+  if (l)\
+    fprintf(stderr, "%s: ", l);\
+  vfprintf(stderr, fmt, ap);\
+  fprintf(stderr, "\n");\
+  va_end(ap);\
+} while (0)
+
+
 FILE *set_binary_mode(FILE *stream) {
   (void)stream;
 #if defined(_WIN32) || defined(__OS2__)
@@ -27,3 +45,88 @@
 #endif
   return stream;
 }
+
+void die(const char *fmt, ...) {
+  LOG_ERROR(NULL);
+  usage_exit();
+}
+
+void fatal(const char *fmt, ...) {
+  LOG_ERROR("Fatal");
+  exit(EXIT_FAILURE);
+}
+
+void warn(const char *fmt, ...) {
+  LOG_ERROR("Warning");
+}
+
+uint16_t mem_get_le16(const void *data) {
+  uint16_t val;
+  const uint8_t *mem = (const uint8_t*)data;
+
+  val = mem[1] << 8;
+  val |= mem[0];
+  return val;
+}
+
+uint32_t mem_get_le32(const void *data) {
+  uint32_t val;
+  const uint8_t *mem = (const uint8_t*)data;
+
+  val = mem[3] << 24;
+  val |= mem[2] << 16;
+  val |= mem[1] << 8;
+  val |= mem[0];
+  return val;
+}
+
+int read_yuv_frame(struct VpxInputContext *input_ctx, vpx_image_t *yuv_frame) {
+  FILE *f = input_ctx->file;
+  struct FileTypeDetectionBuffer *detect = &input_ctx->detect;
+  int plane = 0;
+  int shortread = 0;
+
+  for (plane = 0; plane < 3; ++plane) {
+    uint8_t *ptr;
+    const int w = (plane ? (1 + yuv_frame->d_w) / 2 : yuv_frame->d_w);
+    const int h = (plane ? (1 + yuv_frame->d_h) / 2 : yuv_frame->d_h);
+    int r;
+
+    /* Determine the correct plane based on the image format. The for-loop
+     * always counts in Y,U,V order, but this may not match the order of
+     * the data on disk.
+     */
+    switch (plane) {
+      case 1:
+        ptr = yuv_frame->planes[
+            yuv_frame->fmt == VPX_IMG_FMT_YV12 ? VPX_PLANE_V : VPX_PLANE_U];
+        break;
+      case 2:
+        ptr = yuv_frame->planes[
+            yuv_frame->fmt == VPX_IMG_FMT_YV12 ? VPX_PLANE_U : VPX_PLANE_V];
+        break;
+      default:
+        ptr = yuv_frame->planes[plane];
+    }
+
+    for (r = 0; r < h; ++r) {
+      size_t needed = w;
+      size_t buf_position = 0;
+      const size_t left = detect->buf_read - detect->position;
+      if (left > 0) {
+        const size_t more = (left < needed) ? left : needed;
+        memcpy(ptr, detect->buf + detect->position, more);
+        buf_position = more;
+        needed -= more;
+        detect->position += more;
+      }
+      if (needed > 0) {
+        shortread |= (fread(ptr + buf_position, 1, needed, f) < needed);
+      }
+
+      ptr += yuv_frame->stride[plane];
+    }
+  }
+
+  return shortread;
+}