| /* |
| * Copyright (c) 2016, Alliance for Open Media. All rights reserved. |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| * Media Patent License 1.0 was not distributed with this source code in the |
| * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| * |
| * Based on code from the OggTheora software codec source code, |
| * Copyright (C) 2002-2010 The Xiph.Org Foundation and contributors. |
| */ |
| |
| #ifndef AOM_COMMON_Y4MINPUT_H_ |
| #define AOM_COMMON_Y4MINPUT_H_ |
| |
| #include <stdio.h> |
| #include "aom/aom_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 aom_img_fmt aom_fmt; |
| int bps; |
| unsigned int bit_depth; |
| aom_color_range_t color_range; |
| }; |
| |
| /** |
| * Open the input file, treating it as Y4M. |y4m_ctx| is filled in after |
| * reading it. Note that |csp| should only be set for 420 input, and the input |
| * chroma is shifted if necessary. The code does not support the conversion |
| * from co-located to vertical. 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, aom_chroma_sample_position_t csp, |
| int only_420); |
| void y4m_input_close(y4m_input *_y4m); |
| int y4m_input_fetch_frame(y4m_input *_y4m, FILE *_fin, aom_image_t *img); |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif |
| |
| #endif // AOM_COMMON_Y4MINPUT_H_ |