void uvc_video_decode_isight(struct urb *urb, struct uvc_video_device *video, struct uvc_buffer *buf) { int ret, i; for (i = 0; i < urb->number_of_packets; ++i) { if (urb->iso_frame_desc[i].status < 0) { uvc_trace(UVC_TRACE_FRAME, "USB isochronous frame " "lost (%d).\n", urb->iso_frame_desc[i].status); } /* Decode the payload packet. * uvc_video_decode is entered twice when a frame transition * has been detected because the end of frame can only be * reliably detected when the first packet of the new frame * is processed. The first pass detects the transition and * closes the previous frame's buffer, the second pass * processes the data of the first payload of the new frame. */ do { ret = isight_decode(&video->queue, buf, urb->transfer_buffer + urb->iso_frame_desc[i].offset, urb->iso_frame_desc[i].actual_length); if (buf == NULL) break; if (buf->state == UVC_BUF_STATE_DONE || buf->state == UVC_BUF_STATE_ERROR) buf = uvc_queue_next_buffer(&video->queue, buf); } while (ret == -EAGAIN); } }
void uvc_video_decode_isight(struct urb *urb, struct uvc_streaming *stream, struct uvc_buffer *buf) { int ret, i; for (i = 0; i < urb->number_of_packets; ++i) { if (urb->iso_frame_desc[i].status < 0) { uvc_trace(UVC_TRACE_FRAME, "USB isochronous frame " "lost (%d).\n", urb->iso_frame_desc[i].status); } /* */ do { ret = isight_decode(&stream->queue, buf, urb->transfer_buffer + urb->iso_frame_desc[i].offset, urb->iso_frame_desc[i].actual_length); if (buf == NULL) break; if (buf->state == UVC_BUF_STATE_DONE || buf->state == UVC_BUF_STATE_ERROR) buf = uvc_queue_next_buffer(&stream->queue, buf); } while (ret == -EAGAIN); } }