ivtv_dequeue
while ((buf = ivtv_dequeue(s_vbi, &s_vbi->q_full))) {
buf = ivtv_dequeue(s, &s->q_io);
buf = ivtv_dequeue(s, &s->q_full);
while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_io)))
while (q.length - q.bytesused < count && (buf = ivtv_dequeue(s, &s->q_free))) {
while ((buf = ivtv_dequeue(s, &q))) {
buf = ivtv_dequeue(s, &s->q_io);
buf = ivtv_dequeue(s, &s->q_full);
while ((buf = ivtv_dequeue(s, &s->q_dma)) != NULL) {
while ((buf = ivtv_dequeue(s, &s->q_free))) {
struct ivtv_buffer *ivtv_dequeue(struct ivtv_stream *s, struct ivtv_queue *q);