y4menc.c

   1 /*
   2  *  Copyright (c) 2014 The WebM project authors. All Rights Reserved.
   3  *
   4  *  Use of this source code is governed by a BSD-style license
   5  *  that can be found in the LICENSE file in the root of the source
   6  *  tree. An additional intellectual property rights grant can be found
   7  *  in the file PATENTS.  All contributing project authors may
   8  *  be found in the AUTHORS file in the root of the source tree.
   9  */
  10
  11 #include "./y4menc.h"
  12
  13 int y4m_write_file_header(char *buf, size_t len, int width, int height,
  14                           const struct VpxRational *framerate,
  15                           vpx_img_fmt_t fmt) {
  16   const char *const color = fmt == VPX_IMG_FMT_444A ? "C444alpha\n" :
  17                             fmt == VPX_IMG_FMT_I444 ? "C444\n" :
  18                             fmt == VPX_IMG_FMT_I422 ? "C422\n" :
  19                             "C420jpeg\n";
  20
  21   return snprintf(buf, len, "YUV4MPEG2 W%u H%u F%u:%u I%c %s", width, height,
  22                   framerate->numerator, framerate->denominator, 'p', color);
  23 }
  24
  25 int y4m_write_frame_header(char *buf, size_t len) {
  26   return snprintf(buf, len, "FRAME\n");
  27 }