AVFifoBuffer *av_fifo_alloc(unsigned int size)
{
AVFifoBuffer *f= av_mallocz(sizeof(AVFifoBuffer));
- if(!f)
+ if (!f)
return NULL;
f->buffer = av_malloc(size);
f->end = f->buffer + size;
void av_fifo_free(AVFifoBuffer *f)
{
- if(f){
+ if (f) {
av_freep(&f->buffer);
av_free(f);
}
return f->end - f->buffer - av_fifo_size(f);
}
-int av_fifo_realloc2(AVFifoBuffer *f, unsigned int new_size) {
- unsigned int old_size= f->end - f->buffer;
+int av_fifo_realloc2(AVFifoBuffer *f, unsigned int new_size)
+{
+ unsigned int old_size = f->end - f->buffer;
- if(old_size < new_size){
- int len= av_fifo_size(f);
- AVFifoBuffer *f2= av_fifo_alloc(new_size);
+ if (old_size < new_size) {
+ int len = av_fifo_size(f);
+ AVFifoBuffer *f2 = av_fifo_alloc(new_size);
if (!f2)
- return -1;
+ return AVERROR(ENOMEM);
av_fifo_generic_read(f, f2->buffer, len, NULL);
f2->wptr += len;
f2->wndx += len;
av_free(f->buffer);
- *f= *f2;
+ *f = *f2;
av_free(f2);
}
return 0;
int total = size;
do {
int len = FFMIN(f->end - f->wptr, size);
- if(func) {
- if(func(src, f->wptr, len) <= 0)
+ if (func) {
+ if (func(src, f->wptr, len) <= 0)
break;
} else {
memcpy(f->wptr, src, len);
f->rptr -= f->end - f->buffer;
f->rndx += size;
}
+
+#ifdef TEST
+
+#undef printf
+
+int main(void)
+{
+ /* create a FIFO buffer */
+ AVFifoBuffer *fifo = av_fifo_alloc(13 * sizeof(int));
+ int i, j, n;
+
+ /* fill data */
+ for (i = 0; av_fifo_space(fifo) >= sizeof(int); i++)
+ av_fifo_generic_write(fifo, &i, sizeof(int), NULL);
+
+ /* peek at FIFO */
+ n = av_fifo_size(fifo)/sizeof(int);
+ for (i = -n+1; i < n; i++) {
+ int *v = (int *)av_fifo_peek2(fifo, i*sizeof(int));
+ printf("%d: %d\n", i, *v);
+ }
+ printf("\n");
+
+ /* read data */
+ for (i = 0; av_fifo_size(fifo) >= sizeof(int); i++) {
+ av_fifo_generic_read(fifo, &j, sizeof(int), NULL);
+ printf("%d ", j);
+ }
+ printf("\n");
+
+ av_fifo_free(fifo);
+
+ return 0;
+}
+
+#endif