y4minput.h

   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
  25
  26 typedef struct y4m_input y4m_input;
  27
  28
  29
  30 /*The function used to perform chroma conversion.*/
  31 typedef void (*y4m_convert_func)(y4m_input *_y4m,
  32                                  unsigned char *_dst, unsigned char *_src);
  33
  34
  35
  36 struct 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
  65 int y4m_input_open(y4m_input *_y4m, FILE *_fin, char *_skip, int _nskip,
  66                    int only_420);
  67 void y4m_input_close(y4m_input *_y4m);
  68 int 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_