/**
libsmacker - A C library for decoding .smk Smacker Video files
Copyright (C) 2012-2017 Greg Kennedy
See smacker.h for more information.
smk_bitstream.h
SMK bitstream structure. Presents a block of raw bytes one
bit at a time, and protects against over-read.
*/
#ifndef SMK_BITSTREAM_H
#define SMK_BITSTREAM_H
/** Bitstream structure, Forward declaration */
struct smk_bit_t;
/* BITSTREAM Functions */
/** Initialize a bitstream */
struct smk_bit_t* smk_bs_init(const unsigned char* b, unsigned long size);
/** This macro checks return code from _smk_bs_read_1 and
jumps to error label if problems occur. */
#define smk_bs_read_1(t,uc) \
{ \
if ((char)(uc = _smk_bs_read_1(t)) < 0) \
{ \
fprintf(stderr, "libsmacker::smk_bs_read_1(" #t ", " #uc ") - ERROR (file: %s, line: %lu)\n", __FILE__, (unsigned long)__LINE__); \
goto error; \
} \
}
/** Read a single bit from the bitstream, and advance.
Returns -1 on error. */
char _smk_bs_read_1(struct smk_bit_t* bs);
/** This macro checks return code from _smk_bs_read_8 and
jumps to error label if problems occur. */
#define smk_bs_read_8(t,s) \
{ \
if ((short)(s = _smk_bs_read_8(t)) < 0) \
{ \
fprintf(stderr, "libsmacker::smk_bs_read_8(" #t ", " #s ") - ERROR (file: %s, line: %lu)\n", __FILE__, (unsigned long)__LINE__); \
goto error; \
} \
}
/** Read eight bits from the bitstream (one byte), and advance.
Returns -1 on error. */
short _smk_bs_read_8(struct smk_bit_t* bs);
#endif