*/
typedef struct bs_s
+{
+ const uint8_t *p_start;
+ const uint8_t *p;
+ const uint8_t *p_end;
+
+ unsigned i_left; /* i_count number of available bits */
+} bs_t;
+
+typedef struct bs_writable_s
{
uint8_t *p_start;
uint8_t *p;
uint8_t *p_end;
+
+ unsigned i_left; /* i_count number of available bits */
+} bsw_t;
- int i_left; /* i_count number of available bits */
-} bs_t;
-static inline void bs_init( bs_t *s, void *p_data, int i_data )
+static inline void bs_init( bs_t *s, const void *p_data, unsigned i_data )
{
s->p_start = p_data;
s->p = p_data;
}
}
-static inline void bs_write( bs_t *s, int i_count, uint32_t i_bits )
+/*
+ * Writable bits stream
+ */
+static inline void bsw_init_writable( bsw_t *s, void *p_data, unsigned i_data )
+{
+ s->p_start = p_data;
+ s->p = p_data;
+ s->p_end = s->p + i_data;
+ s->i_left = 8;
+}
+
+static inline bs_t * bs_from_writable( bsw_t *s )
+{
+ return (bs_t *)s;
+}
+
+static inline void bsw_skip( bsw_t *s, int count )
+{
+ return bs_skip(bs_from_writable(s), count);
+}
+
+static inline uint32_t bsw_show( bsw_t *s, int count )
+{
+ return bs_show(bs_from_writable(s), count);
+}
+
+static inline uint32_t bsw_read1( bsw_t *s )
+{
+ return bs_read1(bs_from_writable(s));
+}
+
+static inline uint32_t bsw_read( bsw_t *s, int count )
+{
+ return bs_read(bs_from_writable(s), count);
+}
+
+static inline int bsw_pos( bsw_t *s )
+{
+ return bs_pos(bs_from_writable(s));
+}
+
+static inline int bsw_eof( bsw_t *s )
+{
+ return bs_eof(bs_from_writable(s));
+}
+
+
+static inline void bsw_write( bsw_t *s, int i_count, uint32_t i_bits )
{
while( i_count > 0 )
{
if( s->p >= s->p_end )
- {
break;
- }
i_count--;
if( ( i_bits >> i_count )&0x01 )
- {
*s->p |= 1 << ( s->i_left - 1 );
- }
else
- {
*s->p &= ~( 1 << ( s->i_left - 1 ) );
- }
+
s->i_left--;
if( s->i_left == 0 )
{
}
}
-static inline void bs_align( bs_t *s )
+static inline void bsw_align( bsw_t *s )
{
if( s->i_left != 8 )
{
}
}
-static inline void bs_align_0( bs_t *s )
+static inline void bsw_align_0( bsw_t *s )
{
if( s->i_left != 8 )
- {
- bs_write( s, s->i_left, 0 );
- }
+ bsw_write( s, s->i_left, 0 );
}
-static inline void bs_align_1( bs_t *s )
+static inline void bsw_align_1( bsw_t *s )
{
while( s->i_left != 8 )
- {
- bs_write( s, 1, 1 );
- }
+ bsw_write( s, 1, 1 );
}
#endif