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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
21 extern "C" {
22 #endif
23 
24 typedef struct y4m_input y4m_input;
25 
26 /*The function used to perform chroma conversion.*/
27 typedef void (*y4m_convert_func)(y4m_input *_y4m, unsigned char *_dst,
28                                  unsigned char *_src);
29 
30 struct 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 bps;
56   unsigned int bit_depth;
57 };
58 
59 int y4m_input_open(y4m_input *_y4m, FILE *_fin, char *_skip, int _nskip,
60                    int only_420);
61 void y4m_input_close(y4m_input *_y4m);
62 int y4m_input_fetch_frame(y4m_input *_y4m, FILE *_fin, vpx_image_t *img);
63 
64 #ifdef __cplusplus
65 }  // extern "C"
66 #endif
67 
68 #endif  // Y4MINPUT_H_
69