common/ivfenc.c

   1 /*
   2  * Copyright (c) 2016, Alliance for Open Media. All rights reserved
   3  *
   4  * This source code is subject to the terms of the BSD 2 Clause License and
   5  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
   6  * was not distributed with this source code in the LICENSE file, you can
   7  * obtain it at www.aomedia.org/license/software. If the Alliance for Open
   8  * Media Patent License 1.0 was not distributed with this source code in the
   9  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
  10  */
  11
  12 #include "common/ivfenc.h"
  13
  14 #include "aom/aom_encoder.h"
  15 #include "aom_ports/mem_ops.h"
  16
  17 void ivf_write_file_header(FILE *outfile, const struct aom_codec_enc_cfg *cfg,
  18                            unsigned int fourcc, int frame_cnt) {
  19   char header[32];
  20
  21   header[0] = 'D';
  22   header[1] = 'K';
  23   header[2] = 'I';
  24   header[3] = 'F';
  25   mem_put_le16(header + 4, 0);                     // version
  26   mem_put_le16(header + 6, 32);                    // header size
  27   mem_put_le32(header + 8, fourcc);                // fourcc
  28   mem_put_le16(header + 12, cfg->g_w);             // width
  29   mem_put_le16(header + 14, cfg->g_h);             // height
  30   mem_put_le32(header + 16, cfg->g_timebase.den);  // rate
  31   mem_put_le32(header + 20, cfg->g_timebase.num);  // scale
  32   mem_put_le32(header + 24, frame_cnt);            // length
  33   mem_put_le32(header + 28, 0);                    // unused
  34
  35   fwrite(header, 1, 32, outfile);
  36 }
  37
  38 void ivf_write_frame_header(FILE *outfile, int64_t pts, size_t frame_size) {
  39   char header[12];
  40
  41   mem_put_le32(header, (int)frame_size);
  42   mem_put_le32(header + 4, (int)(pts & 0xFFFFFFFF));
  43   mem_put_le32(header + 8, (int)(pts >> 32));
  44   fwrite(header, 1, 12, outfile);
  45 }
  46
  47 void ivf_write_frame_size(FILE *outfile, size_t frame_size) {
  48   char header[4];
  49
  50   mem_put_le32(header, (int)frame_size);
  51   fwrite(header, 1, 4, outfile);
  52 }