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
14#ifndef Y4MINPUT_H_
15#define Y4MINPUT_H_
16
17# include <stdio.h>
18# include "vpx/vpx_image.h"
19
20#ifdef __cplusplus
21extern "C" {
22#endif
23
24
25
26typedef struct y4m_input y4m_input;
27
28
29
30/*The function used to perform chroma conversion.*/
31typedef void (*y4m_convert_func)(y4m_input *_y4m,
32                                 unsigned char *_dst, unsigned char *_src);
33
34
35
36struct y4m_input {
37  int               pic_w;
38  int               pic_h;
39  int               fps_n;
40  int               fps_d;
41  int               par_n;
42  int               par_d;
43  char              interlace;
44  int               src_c_dec_h;
45  int               src_c_dec_v;
46  int               dst_c_dec_h;
47  int               dst_c_dec_v;
48  char              chroma_type[16];
49  /*The size of each converted frame buffer.*/
50  size_t            dst_buf_sz;
51  /*The amount to read directly into the converted frame buffer.*/
52  size_t            dst_buf_read_sz;
53  /*The size of the auxilliary buffer.*/
54  size_t            aux_buf_sz;
55  /*The amount to read into the auxilliary buffer.*/
56  size_t            aux_buf_read_sz;
57  y4m_convert_func  convert;
58  unsigned char    *dst_buf;
59  unsigned char    *aux_buf;
60  enum vpx_img_fmt  vpx_fmt;
61  int               bps;
62  unsigned int      bit_depth;
63};
64
65int y4m_input_open(y4m_input *_y4m, FILE *_fin, char *_skip, int _nskip,
66                   int only_420);
67void y4m_input_close(y4m_input *_y4m);
68int y4m_input_fetch_frame(y4m_input *_y4m, FILE *_fin, vpx_image_t *img);
69
70#ifdef __cplusplus
71}  // extern "C"
72#endif
73
74#endif  // Y4MINPUT_H_
75