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https://github.com/panzi/mediaextract
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24 lines
678 B
C
24 lines
678 B
C
#ifndef AUDIOEXTRACT_MPG123_H__
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#define AUDIOEXTRACT_MPG123_H__
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#include "audioextract.h"
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#define IS_MPG123_MAGIC(hdr) \
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( ( ((uint8_t)(hdr)[0] & 0xFF) == 0xFF) \
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&& ( ((uint8_t)(hdr)[1] & 0xE0) == 0xE0) /* 3 sync bits */ \
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&& ( ((uint8_t)(hdr)[1] & 0x18) != 0x08) /* Version rsvd */ \
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&& ( ((uint8_t)(hdr)[1] & 0x06) != 0x00) /* Layer rsvd */ \
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&& ( ((uint8_t)(hdr)[2] & 0xF0) != 0xF0)) /* Bitrate rsvd */
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#define MPG123_HEADER_SIZE 4
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struct mpg123_info {
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uint16_t frame_size;
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uint8_t version;
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uint8_t layer;
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};
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int mpg123_isframe(const unsigned char *start, const unsigned char *end, struct mpg123_info *info);
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#endif /* AUDIOEXTRACT_MPG123_H__ */
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