webmenc.h

   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 #ifndef WEBMENC_H_
  11 #define WEBMENC_H_
  12
  13 #include <stdio.h>
  14 #include <stdlib.h>
  15
  16 #if defined(_MSC_VER)
  17 /* MSVS doesn't define off_t */
  18 typedef __int64 off_t;
  19 #else
  20 #include <stdint.h>
  21 #endif
  22
  23 #include "tools_common.h"
  24 #include "vpx/vpx_encoder.h"
  25
  26 #ifdef __cplusplus
  27 extern "C" {
  28 #endif
  29
  30 typedef off_t EbmlLoc;
  31
  32 struct cue_entry {
  33   unsigned int time;
  34   uint64_t loc;
  35 };
  36
  37 struct EbmlGlobal {
  38   int debug;
  39
  40   FILE *stream;
  41   int64_t last_pts_ms;
  42   vpx_rational_t framerate;
  43
  44   /* These pointers are to the start of an element */
  45   off_t position_reference;
  46   off_t seek_info_pos;
  47   off_t segment_info_pos;
  48   off_t track_pos;
  49   off_t cue_pos;
  50   off_t cluster_pos;
  51
  52   /* This pointer is to a specific element to be serialized */
  53   off_t track_id_pos;
  54
  55   /* These pointers are to the size field of the element */
  56   EbmlLoc startSegment;
  57   EbmlLoc startCluster;
  58
  59   uint32_t cluster_timecode;
  60   int cluster_open;
  61
  62   struct cue_entry *cue_list;
  63   unsigned int cues;
  64 };
  65
  66 /* Stereo 3D packed frame format */
  67 typedef enum stereo_format {
  68   STEREO_FORMAT_MONO = 0,
  69   STEREO_FORMAT_LEFT_RIGHT = 1,
  70   STEREO_FORMAT_BOTTOM_TOP = 2,
  71   STEREO_FORMAT_TOP_BOTTOM = 3,
  72   STEREO_FORMAT_RIGHT_LEFT = 11
  73 } stereo_format_t;
  74
  75 void write_webm_seek_element(struct EbmlGlobal *ebml,
  76                              unsigned int id,
  77                              off_t pos);
  78
  79 void write_webm_file_header(struct EbmlGlobal *glob,
  80                             const vpx_codec_enc_cfg_t *cfg,
  81                             const struct vpx_rational *fps,
  82                             stereo_format_t stereo_fmt,
  83                             unsigned int fourcc);
  84
  85 void write_webm_block(struct EbmlGlobal *glob,
  86                       const vpx_codec_enc_cfg_t *cfg,
  87                       const vpx_codec_cx_pkt_t *pkt);
  88
  89 void write_webm_file_footer(struct EbmlGlobal *glob, int hash);
  90
  91 #ifdef __cplusplus
  92 }  // extern "C"
  93 #endif
  94
  95 #endif  // WEBMENC_H_