video_reader.h

   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 #ifndef VIDEO_READER_H_
  12 #define VIDEO_READER_H_
  13
  14 #include "./video_common.h"
  15
  16 // The following code is work in progress. It is going to  support transparent
  17 // reading of input files. Right now only IVF format is supported for
  18 // simplicity. The main goal the API is to be simple and easy to use in example
  19 // code and in vpxenc/vpxdec later. All low-level details like memory
  20 // buffer management are hidden from API users.
  21 struct VpxVideoReaderStruct;
  22 typedef struct VpxVideoReaderStruct VpxVideoReader;
  23
  24 #ifdef __cplusplus
  25 extern "C" {
  26 #endif
  27
  28 // Opens the input file for reading and inspects it to determine file type.
  29 // Returns an opaque VpxVideoReader* upon success, or NULL upon failure.
  30 // Right now only IVF format is supported.
  31 VpxVideoReader *vpx_video_reader_open(const char *filename);
  32
  33 // Frees all resources associated with VpxVideoReader* returned from
  34 // vpx_video_reader_open() call.
  35 void vpx_video_reader_close(VpxVideoReader *reader);
  36
  37 // Reads frame from the file and stores it in internal buffer.
  38 int vpx_video_reader_read_frame(VpxVideoReader *reader);
  39
  40 // Returns the pointer to memory buffer with frame data read by last call to
  41 // vpx_video_reader_read_frame().
  42 const uint8_t *vpx_video_reader_get_frame(VpxVideoReader *reader,
  43                                           size_t *size);
  44
  45 // Fills VpxVideoInfo with information from opened video file.
  46 const VpxVideoInfo *vpx_video_reader_get_info(VpxVideoReader *reader);
  47
  48 #ifdef __cplusplus
  49 }  // extern "C"
  50 #endif
  51
  52 #endif  // VIDEO_READER_H_