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40 @brief Implementation of an individual bit input-output (BIO)
42 The functions in BIO.C have for goal to realize an individual bit input - output.
45 /** @defgroup BIO BIO - Individual bit input-output stream */
49 Individual bit input-output stream (BIO)
51 typedef struct opj_bio {
52 /** pointer to the start of the buffer */
54 /** pointer to the end of the buffer */
56 /** pointer to the present position in the buffer */
58 /** temporary place where each byte is read or written */
60 /** coder : number of bits free to write. decoder : number of bits read */
64 /** @name Funciones generales */
66 /* ----------------------------------------------------------------------- */
68 Create a new BIO handle
69 @return Returns a new BIO handle if successful, returns NULL otherwise
71 opj_bio_t* bio_create(void);
73 Destroy a previously created BIO handle
74 @param bio BIO handle to destroy
76 void bio_destroy(opj_bio_t *bio);
78 Number of bytes written.
80 @return Returns the number of bytes written
82 int bio_numbytes(opj_bio_t *bio);
86 @param bp Output buffer
87 @param len Output buffer length
89 void bio_init_enc(opj_bio_t *bio, unsigned char *bp, int len);
93 @param bp Input buffer
94 @param len Input buffer length
96 void bio_init_dec(opj_bio_t *bio, unsigned char *bp, int len);
100 @param v Value of bits
101 @param n Number of bits to write
103 void bio_write(opj_bio_t *bio, int v, int n);
106 @param bio BIO handle
107 @param n Number of bits to read
108 @return Returns the corresponding read number
110 int bio_read(opj_bio_t *bio, int n);
113 @param bio BIO handle
114 @return Returns 1 if successful, returns 0 otherwise
116 int bio_flush(opj_bio_t *bio);
118 Passes the ending bits (coming from flushing)
119 @param bio BIO handle
120 @return Returns 1 if successful, returns 0 otherwise
122 int bio_inalign(opj_bio_t *bio);
125 @param bio BIO handle
126 @return Returns the read bit
129 /*int bio_getbit(opj_bio_t *bio);*/
131 /* ----------------------------------------------------------------------- */