chromium/third_party/libvpx/source/libvpx/y4minput.h

/*
 *  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

y4m_input;

/*The function used to perform chroma conversion.*/
y4m_convert_func;

struct y4m_input { … };

/**
 * 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_