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51 lines
1.7 KiB
C
51 lines
1.7 KiB
C
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#ifndef __PICTURE_H
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#define __PICTURE_H
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#include <ogg/ogg.h>
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typedef enum{
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PIC_FORMAT_JPEG,
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PIC_FORMAT_PNG,
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PIC_FORMAT_GIF
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}picture_format;
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#define BASE64_LENGTH(len) (((len)+2)/3*4)
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/*Utility function for base64 encoding METADATA_BLOCK_PICTURE tags.
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Stores BASE64_LENGTH(len)+1 bytes in dst (including a terminating NUL).*/
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void base64_encode(char *dst, const char *src, int len);
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int oi_strncasecmp(const char *a, const char *b, int n);
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int is_jpeg(const unsigned char *buf, size_t length);
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int is_png(const unsigned char *buf, size_t length);
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int is_gif(const unsigned char *buf, size_t length);
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void extract_png_params(const unsigned char *data, size_t data_length,
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ogg_uint32_t *width, ogg_uint32_t *height,
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ogg_uint32_t *depth, ogg_uint32_t *colors,
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int *has_palette);
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void extract_gif_params(const unsigned char *data, size_t data_length,
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ogg_uint32_t *width, ogg_uint32_t *height,
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ogg_uint32_t *depth, ogg_uint32_t *colors,
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int *has_palette);
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void extract_jpeg_params(const unsigned char *data, size_t data_length,
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ogg_uint32_t *width, ogg_uint32_t *height,
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ogg_uint32_t *depth, ogg_uint32_t *colors,
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int *has_palette);
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char *parse_picture_specification(const char *spec,
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const char **error_message,
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int *seen_file_icons);
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#define WRITE_U32_BE(buf, val) \
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do{ \
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(buf)[0]=(unsigned char)((val)>>24); \
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(buf)[1]=(unsigned char)((val)>>16); \
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(buf)[2]=(unsigned char)((val)>>8); \
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(buf)[3]=(unsigned char)(val); \
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} \
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while(0);
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#endif /* __PICTURE_H */
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