/* *  Copyright (c) 2010 The WebM project authors. All Rights Reserved. * *  Use of this source code is governed by a BSD-style license *  that can be found in the LICENSE file in the root of the source *  tree. An additional intellectual property rights grant can be found *  in the file PATENTS.  All contributing project authors may *  be found in the AUTHORS file in the root of the source tree. * *  Based on code from the OggTheora software codec source code, *  Copyright (C) 2002-2010 The Xiph.Org Foundation and contributors. */ #ifndef VPX_Y4MINPUT_H_#define VPX_Y4MINPUT_H_ #include <stdio.h>#include "vpx/vpx_image.h" #ifdef __cplusplusextern "C" {#endif typedef struct y4m_input y4m_input; /*The function used to perform chroma conversion.*/typedef void (*y4m_convert_func)(y4m_input *_y4m, unsigned char *_dst,                                 unsigned char *_src); struct y4m_input {  int pic_w;  int pic_h;  int fps_n;  int fps_d;  int par_n;  int par_d;  char interlace;  int src_c_dec_h;  int src_c_dec_v;  int dst_c_dec_h;  int dst_c_dec_v;  char chroma_type[16];  /*The size of each converted frame buffer.*/  size_t dst_buf_sz;  /*The amount to read directly into the converted frame buffer.*/  size_t dst_buf_read_sz;  /*The size of the auxilliary buffer.*/  size_t aux_buf_sz;  /*The amount to read into the auxilliary buffer.*/  size_t aux_buf_read_sz;  y4m_convert_func convert;  unsigned char *dst_buf;  unsigned char *aux_buf;  enum vpx_img_fmt vpx_fmt;  int bps;  unsigned int bit_depth;}; /** * Open the input file, treating it as Y4M. |y4m_ctx| is filled in after * reading it. The |skip_buffer| indicates bytes that were previously read * from |file|, to do input-type detection; this buffer will be read before * the |file| is read. It is of size |num_skip|, which *must* be 8 or less. * * Returns 0 on success, -1 on failure. */int y4m_input_open(y4m_input *y4m_ctx, FILE *file, char *skip_buffer,                   int num_skip, int only_420);void y4m_input_close(y4m_input *_y4m);int y4m_input_fetch_frame(y4m_input *_y4m, FILE *_fin, vpx_image_t *img); #ifdef __cplusplus}  // extern "C"#endif #endif  // VPX_Y4MINPUT_H_