52fcb3ecc6
Add a Memory Descriptor List (MDL) layer to buffer handling to implement scatter-gather I/O. Currently there is still only 1 buffer per MDL. Signed-off-by: Andy Walls <awalls@radix.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/*
|
|
* cx18 init/start/stop/exit stream functions
|
|
*
|
|
* Derived from ivtv-streams.h
|
|
*
|
|
* Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
|
|
* Copyright (C) 2008 Andy Walls <awalls@radix.net>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
* 02111-1307 USA
|
|
*/
|
|
|
|
u32 cx18_find_handle(struct cx18 *cx);
|
|
struct cx18_stream *cx18_handle_to_stream(struct cx18 *cx, u32 handle);
|
|
int cx18_streams_setup(struct cx18 *cx);
|
|
int cx18_streams_register(struct cx18 *cx);
|
|
void cx18_streams_cleanup(struct cx18 *cx, int unregister);
|
|
|
|
/* Related to submission of mdls to firmware */
|
|
static inline void cx18_stream_load_fw_queue(struct cx18_stream *s)
|
|
{
|
|
struct cx18 *cx = s->cx;
|
|
queue_work(cx->out_work_queue, &s->out_work_order);
|
|
}
|
|
|
|
static inline void cx18_stream_put_mdl_fw(struct cx18_stream *s,
|
|
struct cx18_mdl *mdl)
|
|
{
|
|
/* Put mdl on q_free; the out work handler will move mdl(s) to q_busy */
|
|
cx18_enqueue(s, mdl, &s->q_free);
|
|
cx18_stream_load_fw_queue(s);
|
|
}
|
|
|
|
void cx18_out_work_handler(struct work_struct *work);
|
|
|
|
/* Capture related */
|
|
int cx18_start_v4l2_encode_stream(struct cx18_stream *s);
|
|
int cx18_stop_v4l2_encode_stream(struct cx18_stream *s, int gop_end);
|
|
|
|
void cx18_stop_all_captures(struct cx18 *cx);
|