y4minput.h

/*
 *  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               vpx_bps;
};

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"