text: /*
   *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
   *
   *  Use of this source code is governed by a BSD-style license
   *  that can be found in the LICENSE file in the root of the source
   *  tree. An additional intellectual property rights grant can be found
   *  in the file PATENTS.  All contributing project authors may
   *  be found in the AUTHORS file in the root of the source tree.
   *
   *  Based on code from the OggTheora software codec source code,
   *  Copyright (C) 2002-2010 The Xiph.Org Foundation and contributors.
   */
  
  #ifndef Y4MINPUT_H_
  #define Y4MINPUT_H_
  
  # include <stdio.h>
  # include "vpx/vpx_image.h"
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  
  
  typedef struct y4m_input y4m_input;
  
  
  
  /*The function used to perform chroma conversion.*/
  typedef void (*y4m_convert_func)(y4m_input *_y4m,
                                   unsigned char *_dst, unsigned char *_src);
  
  
  
  struct y4m_input {
    int               pic_w;
    int               pic_h;
    int               fps_n;
    int               fps_d;
    int               par_n;
    int               par_d;
    char              interlace;
    int               src_c_dec_h;
    int               src_c_dec_v;
    int               dst_c_dec_h;
    int               dst_c_dec_v;
    char              chroma_type[16];
    /*The size of each converted frame buffer.*/
    size_t            dst_buf_sz;
    /*The amount to read directly into the converted frame buffer.*/
    size_t            dst_buf_read_sz;
    /*The size of the auxilliary buffer.*/
    size_t            aux_buf_sz;
    /*The amount to read into the auxilliary buffer.*/
    size_t            aux_buf_read_sz;
    y4m_convert_func  convert;
    unsigned char    *dst_buf;
    unsigned char    *aux_buf;
    enum vpx_img_fmt  vpx_fmt;
    int               bps;
    unsigned int      bit_depth;
  };
  
  int y4m_input_open(y4m_input *_y4m, FILE *_fin, char *_skip, int _nskip,
                     int only_420);
  void y4m_input_close(y4m_input *_y4m);
  int y4m_input_fetch_frame(y4m_input *_y4m, FILE *_fin, vpx_image_t *img);
  
  #ifdef __cplusplus
  }  // extern "C"
  #endif
  
  #endif  // Y4MINPUT_H_
  