/* This function releases a previously claimed stream. It will take into
account associated VBI streams. */
void cx18_release_stream(struct cx18_stream *s)
{
struct cx18 *cx = s->cx;
struct cx18_stream *s_assoc;
s->id = -1;
if (s->type == CX18_ENC_STREAM_TYPE_IDX) {
/*
* The IDX stream is only used internally, and can
* only be indirectly unclaimed by unclaiming the MPG stream.
*/
return;
}
if (s->type == CX18_ENC_STREAM_TYPE_VBI &&
test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags)) {
/* this stream is still in use internally */
return;
}
if (!test_and_clear_bit(CX18_F_S_CLAIMED, &s->s_flags)) {
CX18_DEBUG_WARN("Release stream %s not in use!\n", s->name);
return;
}
cx18_flush_queues(s);
/*
* CX18_ENC_STREAM_TYPE_MPG needs to release the
* CX18_ENC_STREAM_TYPE_VBI and/or CX18_ENC_STREAM_TYPE_IDX streams.
*
* For all other streams we're done.
*/
if (s->type != CX18_ENC_STREAM_TYPE_MPG)
return;
/* Unclaim the associated MPEG Index stream */
s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
if (test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags)) {
clear_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags);
cx18_flush_queues(s_assoc);
}
/* Unclaim the associated VBI stream */
s_assoc = &cx->streams[CX18_ENC_STREAM_TYPE_VBI];
if (test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_assoc->s_flags)) {
if (s_assoc->id == -1) {
/*
* The VBI stream is not still claimed by a file
* descriptor, so completely unclaim it.
*/
clear_bit(CX18_F_S_CLAIMED, &s_assoc->s_flags);
cx18_flush_queues(s_assoc);
}
}
}
/* This function releases a previously claimed stream. It will take into
account associated VBI streams. */
static void cx18_release_stream(struct cx18_stream *s)
{
struct cx18 *cx = s->cx;
struct cx18_stream *s_vbi;
s->id = -1;
if (s->type == CX18_ENC_STREAM_TYPE_VBI &&
test_bit(CX18_F_S_INTERNAL_USE, &s->s_flags)) {
/* this stream is still in use internally */
return;
}
if (!test_and_clear_bit(CX18_F_S_CLAIMED, &s->s_flags)) {
CX18_DEBUG_WARN("Release stream %s not in use!\n", s->name);
return;
}
cx18_flush_queues(s);
/* CX18_ENC_STREAM_TYPE_MPG needs to release CX18_ENC_STREAM_TYPE_VBI,
for all other streams we're done */
if (s->type == CX18_ENC_STREAM_TYPE_MPG)
s_vbi = &cx->streams[CX18_ENC_STREAM_TYPE_VBI];
else
return;
/* clear internal use flag */
if (!test_and_clear_bit(CX18_F_S_INTERNAL_USE, &s_vbi->s_flags)) {
/* was already cleared */
return;
}
if (s_vbi->id != -1) {
/* VBI stream still claimed by a file descriptor */
return;
}
clear_bit(CX18_F_S_CLAIMED, &s_vbi->s_flags);
cx18_flush_queues(s_vbi);
}
