ivfenc.c

   1 /*
   2  *  Copyright (c) 2013 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 "./ivfenc.h"
  12
  13 #include "vpx/vpx_encoder.h"
  14 #include "vpx_ports/mem_ops.h"
  15
  16 void ivf_write_file_header(FILE *outfile,
  17                            const struct vpx_codec_enc_cfg *cfg,
  18                            unsigned int fourcc,
  19                            int frame_cnt) {
  20   char header[32];
  21
  22   header[0] = 'D';
  23   header[1] = 'K';
  24   header[2] = 'I';
  25   header[3] = 'F';
  26   mem_put_le16(header + 4, 0);                     // version
  27   mem_put_le16(header + 6, 32);                    // header size
  28   mem_put_le32(header + 8, fourcc);                // fourcc
  29   mem_put_le16(header + 12, cfg->g_w);             // width
  30   mem_put_le16(header + 14, cfg->g_h);             // height
  31   mem_put_le32(header + 16, cfg->g_timebase.den);  // rate
  32   mem_put_le32(header + 20, cfg->g_timebase.num);  // scale
  33   mem_put_le32(header + 24, frame_cnt);            // length
  34   mem_put_le32(header + 28, 0);                    // unused
  35
  36   fwrite(header, 1, 32, outfile);
  37 }
  38
  39 void ivf_write_frame_header(FILE *outfile, int64_t pts, size_t frame_size) {
  40   char header[12];
  41
  42   mem_put_le32(header, (int)frame_size);
  43   mem_put_le32(header + 4, (int)(pts & 0xFFFFFFFF));
  44   mem_put_le32(header + 8, (int)(pts >> 32));
  45   fwrite(header, 1, 12, outfile);
  46 }
  47
  48 void ivf_write_frame_size(FILE *outfile, size_t frame_size) {
  49   char header[4];
  50
  51   mem_put_le32(header, (int)frame_size);
  52   fwrite(header, 1, 4, outfile);
  53 }