ref: 7552052b5412a30a85a2ba38a1f30ee923d0dcba
dir: /src/picture.h/
/* Copyright (C)2007-2013 Xiph.Org Foundation
File: picture.h
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __PICTURE_H
#define __PICTURE_H
#include <opus.h>
#include "opusenc.h"
typedef enum{
PIC_FORMAT_JPEG,
PIC_FORMAT_PNG,
PIC_FORMAT_GIF
}picture_format;
#define BASE64_LENGTH(len) (((len)+2)/3*4)
/*Utility function for base64 encoding METADATA_BLOCK_PICTURE tags.
Stores BASE64_LENGTH(len)+1 bytes in dst (including a terminating NUL).*/
void base64_encode(char *dst, const char *src, int len);
int oi_strncasecmp(const char *a, const char *b, int n);
int is_jpeg(const unsigned char *buf, size_t length);
int is_png(const unsigned char *buf, size_t length);
int is_gif(const unsigned char *buf, size_t length);
void extract_png_params(const unsigned char *data, size_t data_length,
opus_uint32 *width, opus_uint32 *height,
opus_uint32 *depth, opus_uint32 *colors,
int *has_palette);
void extract_gif_params(const unsigned char *data, size_t data_length,
opus_uint32 *width, opus_uint32 *height,
opus_uint32 *depth, opus_uint32 *colors,
int *has_palette);
void extract_jpeg_params(const unsigned char *data, size_t data_length,
opus_uint32 *width, opus_uint32 *height,
opus_uint32 *depth, opus_uint32 *colors,
int *has_palette);
char *parse_picture_specification(const char *filename, int picture_type, const char *description,
int *error, int *seen_file_icons);
#define WRITE_U32_BE(buf, val) \
do{ \
(buf)[0]=(unsigned char)((val)>>24); \
(buf)[1]=(unsigned char)((val)>>16); \
(buf)[2]=(unsigned char)((val)>>8); \
(buf)[3]=(unsigned char)(val); \
} \
while(0);
#endif /* __PICTURE_H */