apps/ffmpeg-rockchip
1
0
Fork 0
mirror of https://github.com/nyanmisaka/ffmpeg-rockchip.git synced 2025-10-21 16:10:16 +08:00
Code Issues Packages Projects Releases Wiki Activity

fifo_realloc()

Browse Source 
Originally committed as revision 3726 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2004-12-01 02:28:28 +00:00
parent 61f4aa96ba
commit 0d71240921
3 changed files with 34 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
libavformat/utils.c
View File

@@ -232,6 +232,9 @@ void fifo_free(FifoBuffer *f)
int fifo_size(FifoBuffer *f, uint8_t *rptr)
{
int size;
if(!rptr)
rptr= f->rptr;
if (f->wptr >= rptr) {
size = f->wptr - rptr;
@@ -244,9 +247,13 @@ int fifo_size(FifoBuffer *f, uint8_t *rptr)
/* get data from the fifo (return -1 if not enough data) */
int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr)
{
uint8_t *rptr = *rptr_ptr;
uint8_t *rptr;
int size, len;
if(!rptr_ptr)
rptr_ptr= &f->rptr;
rptr = *rptr_ptr;
if (f->wptr >= rptr) {
size = f->wptr - rptr;
} else {
@@ -270,11 +277,34 @@ int fifo_read(FifoBuffer *f, uint8_t *buf, int buf_size, uint8_t **rptr_ptr)
return 0;
}
void fifo_realloc(FifoBuffer *f, int new_size){
int old_size= f->end - f->buffer;
if(old_size < new_size){
uint8_t *old= f->buffer;
f->buffer= av_realloc(f->buffer, new_size);
f->rptr += f->buffer - old;
f->wptr += f->buffer - old;
if(f->wptr < f->rptr){
memmove(f->rptr + new_size - old_size, f->rptr, f->buffer + old_size - f->rptr);
f->rptr += new_size - old_size;
}
f->end= f->buffer + new_size;
}
}
void fifo_write(FifoBuffer *f, uint8_t *buf, int size, uint8_t **wptr_ptr)
{
int len;
uint8_t *wptr;
if(!wptr_ptr)
wptr_ptr= &f->wptr;
wptr = *wptr_ptr;
while (size > 0) {
len = f->end - wptr;
if (len > size)