y4minput.h 1.8 KB
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/*
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 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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 *
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 *  Use of this source code is governed by a BSD-style license
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 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
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 *  in the file PATENTS.  All contributing project authors may
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 *  be found in the AUTHORS file in the root of the source tree.
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 *
 *  Based on code from the OggTheora software codec source code,
 *  Copyright (C) 2002-2010 The Xiph.Org Foundation and contributors.
 */
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#ifndef Y4MINPUT_H_
#define Y4MINPUT_H_

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#include <stdio.h>
#include "vpx/vpx_image.h"
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#ifdef __cplusplus
extern "C" {
#endif

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typedef struct y4m_input y4m_input;

/*The function used to perform chroma conversion.*/
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typedef void (*y4m_convert_func)(y4m_input *_y4m, unsigned char *_dst,
                                 unsigned char *_src);
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struct y4m_input {
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  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];
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  /*The size of each converted frame buffer.*/
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  size_t dst_buf_sz;
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  /*The amount to read directly into the converted frame buffer.*/
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  size_t dst_buf_read_sz;
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  /*The size of the auxilliary buffer.*/
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  size_t aux_buf_sz;
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  /*The amount to read into the auxilliary buffer.*/
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  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;
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};

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int y4m_input_open(y4m_input *_y4m, FILE *_fin, char *_skip, int _nskip,
                   int only_420);
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void y4m_input_close(y4m_input *_y4m);
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int y4m_input_fetch_frame(y4m_input *_y4m, FILE *_fin, vpx_image_t *img);
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#ifdef __cplusplus
}  // extern "C"
#endif

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#endif  // Y4MINPUT_H_