int raw1394_loop_iterate(raw1394handle_t handle)
{
if (!handle) {
errno = EINVAL;
return -1;
}
if (handle->is_fw)
return fw_loop_iterate(handle);
else
return ieee1394_loop_iterate(handle);
}
int ieee1394_iso_xmit_write(raw1394handle_t handle, unsigned char *data, unsigned int len,
unsigned char tag, unsigned char sy)
{
ieee1394handle_t ihandle = handle->mode.ieee1394;
struct raw1394_iso_status *stat = &ihandle->iso_status;
struct raw1394_iso_packets packets;
struct raw1394_iso_packet_info info;
if(ihandle->iso_mode != ISO_XMIT || ihandle->iso_xmit_handler != NULL) {
errno = EINVAL;
return -1;
}
/* wait until buffer space is available */
while(ihandle->iso_status.n_packets <= 1) {
/* if the file descriptor has been set non-blocking,
return immediately */
if(fcntl(ihandle->fd, F_GETFL) & O_NONBLOCK) {
errno = EAGAIN;
return -1;
}
if(ieee1394_loop_iterate(handle)) {
return -1;
}
}
/* copy the data to the packet buffer */
info.offset = ihandle->next_packet * ihandle->iso_buf_stride;
info.len = len;
info.tag = tag;
info.sy = sy;
memcpy(ihandle->iso_buffer + info.offset, data, len);
packets.n_packets = 1;
packets.infos = &info;
if(ioctl(ihandle->fd, RAW1394_IOC_ISO_XMIT_PACKETS, &packets))
return -1;
stat->n_packets--;
ihandle->next_packet = increment_and_wrap(ihandle->next_packet, stat->config.buf_packets);
if(stat->xmit_cycle != -1)
stat->xmit_cycle = increment_and_wrap(stat->xmit_cycle, 8000);
return 0;
}
