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 #if !defined(_y4minput_H)
  14 # define _y4minput_H (1)
  15 # include <stdio.h>
  16 # include "vpx/vpx_image.h"
  17
  18
  19
  20 typedef struct y4m_input y4m_input;
  21
  22
  23
  24 /*The function used to perform chroma conversion.*/
  25 typedef void (*y4m_convert_func)(y4m_input *_y4m,
  26                                  unsigned char *_dst, unsigned char *_src);
  27
  28
  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 };
  55
  56 int y4m_input_open(y4m_input *_y4m, FILE *_fin, char *_skip, int _nskip);
  57 void y4m_input_close(y4m_input *_y4m);
  58 int y4m_input_fetch_frame(y4m_input *_y4m, FILE *_fin, vpx_image_t *img);
  59
  60 #endif