| /* |
| * 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 __cplusplus |
| extern "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_ |