1/*
2 *  Copyright (c) 2010 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 *  Based on code from the OggTheora software codec source code,
11 *  Copyright (C) 2002-2010 The Xiph.Org Foundation and contributors.
12 */
13#if !defined(_y4minput_H)
14# define _y4minput_H (1)
15# include <stdio.h>
16# include "vpx/vpx_image.h"
17
18
19
20typedef struct y4m_input y4m_input;
21
22
23
24/*The function used to perform chroma conversion.*/
25typedef void (*y4m_convert_func)(y4m_input *_y4m,
26                                 unsigned char *_dst, unsigned char *_src);
27
28
29
30struct y4m_input {
31  int               pic_w;
32  int               pic_h;
33  int               fps_n;
34  int               fps_d;
35  int               par_n;
36  int               par_d;
37  char              interlace;
38  int               src_c_dec_h;
39  int               src_c_dec_v;
40  int               dst_c_dec_h;
41  int               dst_c_dec_v;
42  char              chroma_type[16];
43  /*The size of each converted frame buffer.*/
44  size_t            dst_buf_sz;
45  /*The amount to read directly into the converted frame buffer.*/
46  size_t            dst_buf_read_sz;
47  /*The size of the auxilliary buffer.*/
48  size_t            aux_buf_sz;
49  /*The amount to read into the auxilliary buffer.*/
50  size_t            aux_buf_read_sz;
51  y4m_convert_func  convert;
52  unsigned char    *dst_buf;
53  unsigned char    *aux_buf;
54  enum vpx_img_fmt  vpx_fmt;
55  int               vpx_bps;
56};
57
58int y4m_input_open(y4m_input *_y4m, FILE *_fin, char *_skip, int _nskip,
59                   int only_420);
60void y4m_input_close(y4m_input *_y4m);
61int y4m_input_fetch_frame(y4m_input *_y4m, FILE *_fin, vpx_image_t *img);
62
63#endif
64