115 	struct snd_usX2Y_hwdep_pcm_shm *shm = usX2Y->hwdep_pcm_shm;  in usX2Y_hwdep_urb_play_prepare()  local
118 	if (0 > shm->playback_iso_start) {  in usX2Y_hwdep_urb_play_prepare()
119 		shm->playback_iso_start = shm->captured_iso_head -  in usX2Y_hwdep_urb_play_prepare()
121 		if (0 > shm->playback_iso_start)  in usX2Y_hwdep_urb_play_prepare()
122 			shm->playback_iso_start += ARRAY_SIZE(shm->captured_iso);  in usX2Y_hwdep_urb_play_prepare()
123 		shm->playback_iso_head = shm->playback_iso_start;  in usX2Y_hwdep_urb_play_prepare()
129 		counts = shm->captured_iso[shm->playback_iso_head].length / usX2Y->stride;  in usX2Y_hwdep_urb_play_prepare()
135 		urb->iso_frame_desc[pack].offset = shm->captured_iso[shm->playback_iso_head].offset;  in usX2Y_hwdep_urb_play_prepare()
136 		urb->iso_frame_desc[pack].length = shm->captured_iso[shm->playback_iso_head].length;  in usX2Y_hwdep_urb_play_prepare()
140 		if (++shm->playback_iso_head >= ARRAY_SIZE(shm->captured_iso))  in usX2Y_hwdep_urb_play_prepare()
141 			shm->playback_iso_head = 0;  in usX2Y_hwdep_urb_play_prepare()
156 			struct snd_usX2Y_hwdep_pcm_shm *shm = subs->usX2Y->hwdep_pcm_shm;  in usX2Y_usbpcm_urb_capt_iso_advance()  local
157 			int head = shm->captured_iso_head + 1;  in usX2Y_usbpcm_urb_capt_iso_advance()
158 			if (head >= ARRAY_SIZE(shm->captured_iso))  in usX2Y_usbpcm_urb_capt_iso_advance()
160 			shm->captured_iso[head].frame = urb->start_frame + pack;  in usX2Y_usbpcm_urb_capt_iso_advance()
161 			shm->captured_iso[head].offset = desc->offset;  in usX2Y_usbpcm_urb_capt_iso_advance()
162 			shm->captured_iso[head].length = desc->actual_length;  in usX2Y_usbpcm_urb_capt_iso_advance()
163 			shm->captured_iso_head = head;  in usX2Y_usbpcm_urb_capt_iso_advance()
164 			shm->captured_iso_frames++;  in usX2Y_usbpcm_urb_capt_iso_advance()