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Tweas to PLC

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This commit is contained in:
Steve Underwood 2014-07-22 11:40:34 +08:00
parent 47e5887288
commit 720e7a23c4
1 changed files with 8 additions and 7 deletions
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15
libs/spandsp/src/plc.c
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@ -46,6 +46,7 @@
#include "spandsp/alloc.h"
#include "spandsp/fast_convert.h"
#include "spandsp/saturated.h"
#include "spandsp/vector_int.h"
#include "spandsp/plc.h"
#include "spandsp/private/plc.h"
@ -58,21 +59,21 @@ static void save_history(plc_state_t *s, int16_t *buf, int len)
if (len >= PLC_HISTORY_LEN)
{
/* Just keep the last part of the new data, starting at the beginning of the buffer */
memcpy(s->history, &buf[len - PLC_HISTORY_LEN], sizeof(int16_t)*PLC_HISTORY_LEN);
vec_copyi16(s->history, &buf[len - PLC_HISTORY_LEN], PLC_HISTORY_LEN);
s->buf_ptr = 0;
return;
}
if (s->buf_ptr + len > PLC_HISTORY_LEN)
{
/* Wraps around - must break into two sections */
memcpy(&s->history[s->buf_ptr], buf, sizeof(int16_t)*(PLC_HISTORY_LEN - s->buf_ptr));
vec_copyi16(&s->history[s->buf_ptr], buf, PLC_HISTORY_LEN - s->buf_ptr);
len -= (PLC_HISTORY_LEN - s->buf_ptr);
memcpy(s->history, &buf[PLC_HISTORY_LEN - s->buf_ptr], sizeof(int16_t)*len);
vec_copyi16(s->history, &buf[PLC_HISTORY_LEN - s->buf_ptr], len);
s->buf_ptr = len;
return;
}
/* Can use just one section */
memcpy(&s->history[s->buf_ptr], buf, sizeof(int16_t)*len);
vec_copyi16(&s->history[s->buf_ptr], buf, len);
s->buf_ptr += len;
}
/*- End of function --------------------------------------------------------*/
@ -83,9 +84,9 @@ static __inline__ void normalise_history(plc_state_t *s)
if (s->buf_ptr == 0)
return;
memcpy(tmp, s->history, sizeof(int16_t)*s->buf_ptr);
memmove(s->history, &s->history[s->buf_ptr], sizeof(int16_t)*(PLC_HISTORY_LEN - s->buf_ptr));
memcpy(&s->history[PLC_HISTORY_LEN - s->buf_ptr], tmp, sizeof(int16_t)*s->buf_ptr);
vec_copyi16(tmp, s->history, s->buf_ptr);
vec_copyi16(s->history, &s->history[s->buf_ptr], PLC_HISTORY_LEN - s->buf_ptr);
vec_copyi16(&s->history[PLC_HISTORY_LEN - s->buf_ptr], tmp, s->buf_ptr);
s->buf_ptr = 0;
}
/*- End of function --------------------------------------------------------*/