int acquire_slot(memblock_t *mb, void **slot)
{
assert(NULL != mb);
assert(is_valid_memblock(mb));
if (!slot_available(mb))
return 0;
// retrieve a pointer to a free slot from the stack
*slot = *mb->stack_top;
// get a free slot from the stack
// remove that slot from the stack (it's no longer free)
if (mb->stack == mb->stack_top)
{
mb->stack_empty = 1;
}
else
{
mb->stack_top--;
}
return 1;
}
gboolean
gst_ts_cache_push (GstTSCache * cache, guint8 * data, gsize size)
{
Slot *tail;
gsize avail;
#if DEBUG_RINGBUFFER
dump_cache_state (cache, "pre-push");
#endif
while (size) {
#if DEBUG_RINGBUFFER
GST_DEBUG ("remaining size %d", size);
dump_cache_state (cache, "pre-push");
#endif
tail = &cache->slots[cache->tail];
gst_ts_cache_recycle (cache, tail);
if (slot_available (tail, &avail)) {
avail = MIN (avail, size);
if (slot_write (tail, data, avail, cache->h_rb_offset)) {
/* Move the tail when the slot is full */
cache->tail = (cache->tail + 1) % cache->nslots;
cache->h_rb_offset += CACHE_SLOT_SIZE;
g_atomic_int_inc (&cache->fslots);
}
data += avail;
size -= avail;
cache->h_offset += avail;
} else {
return FALSE;
}
}
#if DEBUG_RINGBUFFER
dump_cache_state (cache, "post-push");
#endif
return TRUE;
}
