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42 @brief Implementation of an individual bit input-output (BIO)
44 The functions in BIO.C have for goal to realize an individual bit input - output.
47 /** @defgroup BIO BIO - Individual bit input-output stream */
51 Individual bit input-output stream (BIO)
53 typedef struct opj_bio {
54 /** pointer to the start of the buffer */
56 /** pointer to the end of the buffer */
58 /** pointer to the present position in the buffer */
60 /** temporary place where each byte is read or written */
62 /** coder : number of bits free to write. decoder : number of bits read */
66 /** @name Exported functions */
68 /* ----------------------------------------------------------------------- */
70 Create a new BIO handle
71 @return Returns a new BIO handle if successful, returns NULL otherwise
73 opj_bio_t* bio_create(void);
75 Destroy a previously created BIO handle
76 @param bio BIO handle to destroy
78 void bio_destroy(opj_bio_t *bio);
80 Number of bytes written.
82 @return Returns the number of bytes written
84 int bio_numbytes(opj_bio_t *bio);
88 @param bp Output buffer
89 @param len Output buffer length
91 void bio_init_enc(opj_bio_t *bio, unsigned char *bp, int len);
95 @param bp Input buffer
96 @param len Input buffer length
98 void bio_init_dec(opj_bio_t *bio, unsigned char *bp, int len);
101 @param bio BIO handle
102 @param v Value of bits
103 @param n Number of bits to write
105 void bio_write(opj_bio_t *bio, int v, int n);
108 @param bio BIO handle
109 @param n Number of bits to read
110 @return Returns the corresponding read number
112 int bio_read(opj_bio_t *bio, int n);
115 @param bio BIO handle
116 @return Returns 1 if successful, returns 0 otherwise
118 int bio_flush(opj_bio_t *bio);
120 Passes the ending bits (coming from flushing)
121 @param bio BIO handle
122 @return Returns 1 if successful, returns 0 otherwise
124 int bio_inalign(opj_bio_t *bio);
125 /* ----------------------------------------------------------------------- */