/* * 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
typedefstruct y4m_input y4m_input;
/*The function used to perform chroma conversion.*/ typedefvoid (*y4m_convert_func)(y4m_input *_y4m, unsignedchar *_dst, unsignedchar *_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; unsignedchar *dst_buf; unsignedchar *aux_buf; enum vpx_img_fmt vpx_fmt; int bps; unsignedint 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);
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