C++ (Cpp) pvr2_ioread_filter Examples

Example #1

File: pvrusb2-ioread.c Project: forgivemyheart/linux

int pvr2_ioread_avail(struct pvr2_ioread *cp)
{
	int ret;
	if (!(cp->enabled)) {
		// Stream is not enabled; so this is an I/O error
		return -EIO;
	}

	if (cp->sync_state == 1) {
		pvr2_ioread_filter(cp);
		if (cp->sync_state == 1) return -EAGAIN;
	}

	ret = 0;
	if (cp->stream_running) {
		if (!pvr2_stream_get_ready_count(cp->stream)) {
			// No data available at all right now.
			ret = -EAGAIN;
		}
	} else {
		if (pvr2_stream_get_ready_count(cp->stream) < BUFFER_COUNT/2) {
			// Haven't buffered up enough yet; try again later
			ret = -EAGAIN;
		}
	}

	if ((!(cp->spigot_open)) != (!(ret == 0))) {
		cp->spigot_open = (ret == 0);
		pvr2_trace(PVR2_TRACE_DATA_FLOW,
			   "/*---TRACE_READ---*/ data is %s",
			   cp->spigot_open ? "available" : "pending");
	}

	return ret;
}

Example #2

int pvr2_ioread_avail(struct pvr2_ioread *cp)
{
	int ret;
	if (!(cp->enabled)) {
		
		return -EIO;
	}

	if (cp->sync_state == 1) {
		pvr2_ioread_filter(cp);
		if (cp->sync_state == 1) return -EAGAIN;
	}

	ret = 0;
	if (cp->stream_running) {
		if (!pvr2_stream_get_ready_count(cp->stream)) {
			
			ret = -EAGAIN;
		}
	} else {
		if (pvr2_stream_get_ready_count(cp->stream) < BUFFER_COUNT/2) {
			
			ret = -EAGAIN;
		}
	}

	if ((!(cp->spigot_open)) != (!(ret == 0))) {
		cp->spigot_open = (ret == 0);
		pvr2_trace(PVR2_TRACE_DATA_FLOW,
			   "/*---TRACE_READ---*/ data is %s",
			   cp->spigot_open ? "available" : "pending");
	}

	return ret;
}