usb/pvrusb2/pvrusb2-context.c

237 	struct pvr2_channel *cp;
241 	for (cp = mp->mc_first; cp; cp = cp->mc_next) {
242 		if (!cp->input_mask) continue;
243 		tmsk &= cp->input_mask;
276 void pvr2_channel_init(struct pvr2_channel *cp,struct pvr2_context *mp)
279 	cp->hdw = mp->hdw;
280 	cp->mc_head = mp;
281 	cp->mc_next = NULL;
282 	cp->mc_prev = mp->mc_last;
284 		mp->mc_last->mc_next = cp;
286 		mp->mc_first = cp;
288 	mp->mc_last = cp;
293 static void pvr2_channel_disclaim_stream(struct pvr2_channel *cp)
295 	if (!cp->stream) return;
296 	pvr2_stream_kill(cp->stream->stream);
297 	cp->stream->user = NULL;
298 	cp->stream = NULL;
302 void pvr2_channel_done(struct pvr2_channel *cp)
304 	struct pvr2_context *mp = cp->mc_head;
306 	cp->input_mask = 0;
307 	pvr2_channel_disclaim_stream(cp);
309 	if (cp->mc_next) {
310 		cp->mc_next->mc_prev = cp->mc_prev;
312 		mp->mc_last = cp->mc_prev;
314 	if (cp->mc_prev) {
315 		cp->mc_prev->mc_next = cp->mc_next;
317 		mp->mc_first = cp->mc_next;
319 	cp->hdw = NULL;
324 int pvr2_channel_limit_inputs(struct pvr2_channel *cp,unsigned int cmsk)
329 	struct pvr2_hdw *hdw = cp->hdw;
333 	if (cmsk == cp->input_mask) {
338 	pvr2_context_enter(cp->mc_head);
341 			cp->input_mask = 0;
342 			pvr2_context_reset_input_limits(cp->mc_head);
346 		for (p2 = cp->mc_head->mc_first; p2; p2 = p2->mc_next) {
347 			if (p2 == cp) continue;
361 		cp->input_mask = cmsk;
364 	pvr2_context_exit(cp->mc_head);
369 unsigned int pvr2_channel_get_limited_inputs(struct pvr2_channel *cp)
371 	return cp->input_mask;
375 int pvr2_channel_claim_stream(struct pvr2_channel *cp,
379 	pvr2_context_enter(cp->mc_head); do {
380 		if (sp == cp->stream) break;
385 		pvr2_channel_disclaim_stream(cp);
387 		sp->user = cp;
388 		cp->stream = sp;
390 	pvr2_context_exit(cp->mc_head);
403 	struct pvr2_ioread *cp;
404 	cp = pvr2_ioread_create();
405 	if (!cp) return NULL;
406 	pvr2_ioread_setup(cp,sp->stream);
407 	pvr2_ioread_set_sync_key(cp,stream_sync_key,sizeof(stream_sync_key));
408 	return cp;