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/*
* mfc codec encoding example application
* Andrzej Hajda <a.hajda@samsung.com>
*
* MFC device.
*
* Copyright 2012 Samsung Electronics Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <sys/ioctl.h>
#include <stdlib.h>
#include <fcntl.h>
#include "common.h"
#include "mfc.h"
#include "v4l_dev.h"
#define MAX_STREAM_SIZE (2*1024*1024)
int align(int x, int a)
{
return ((x + a - 1) / a) * a;
}
/* runs v4l_deq_buf and correct ending conditions
according to MFC driver */
int mfc_deq_buf(struct io_dev *dev, enum io_dir dir)
{
int idx;
idx = v4l_deq_buf(dev, dir);
if (dir == DIR_IN && dev->io[DIR_IN].state == FS_END
&& dev->io[DIR_OUT].limit)
dev->io[DIR_OUT].limit = 0;
return idx;
}
struct io_dev_ops mfc_dev_ops = { .req_bufs = v4l_req_bufs,
.enq_buf = v4l_enq_buf,
.deq_buf = mfc_deq_buf,
.deq_event = v4l_deq_event,
.destroy = v4l_destroy
};
struct io_dev *mfc_create(char const *name)
{
struct io_dev *dev;
int ret;
dev = malloc(sizeof(*dev));
memzero(*dev);
dev->ops = &mfc_dev_ops;
dev->io[DIR_IN].type = IO_MMAP;
dev->io[DIR_OUT].type = IO_MMAP;
dev->fd = open(name, O_RDWR, 0);
if (dev->fd < 0) {
err("Cannot open MFC device %s", name);
free(dev);
return NULL;
}
struct v4l2_event_subscription ev_sub;
memzero(ev_sub);
ev_sub.type = V4L2_EVENT_EOS;
ret = ioctl(dev->fd, VIDIOC_SUBSCRIBE_EVENT, &ev_sub);
if (ret != 0)
err("Cannot subscribe EOS event for MFC");
dbg("MFC device %s opened with fd=%d", name, dev->fd);
return dev;
}
int mfc_set_codec(struct io_dev *dev, enum io_dir dir, int codec)
{
struct v4l2_format fmt;
int ret;
memzero(fmt);
fmt.type = io_dir_to_type(dir);
fmt.fmt.pix_mp.pixelformat = codec;
fmt.fmt.pix_mp.plane_fmt[0].sizeimage = MAX_STREAM_SIZE;
ret = ioctl(dev->fd, VIDIOC_S_FMT, &fmt);
return ret;
}
/* set format with proper alignement */
int mfc_set_fmt(struct io_dev *dev, enum io_dir dir, int width, int height)
{
struct v4l2_format fmt;
int ret;
memzero(fmt);
fmt.type = io_dir_to_type(dir);
fmt.fmt.pix_mp.pixelformat = V4L2_PIX_FMT_NV12M;
fmt.fmt.pix_mp.width = width;
fmt.fmt.pix_mp.height = height;
fmt.fmt.pix_mp.num_planes = 2;
fmt.fmt.pix_mp.plane_fmt[0].bytesperline = align(width, 128);
fmt.fmt.pix_mp.plane_fmt[0].sizeimage = align(width * height, 2048);
fmt.fmt.pix_mp.plane_fmt[1].bytesperline = align(width, 128);
fmt.fmt.pix_mp.plane_fmt[1].sizeimage = align(width * (height / 2),
2048);
ret = ioctl(dev->fd, VIDIOC_S_FMT, &fmt);
if (ret != 0)
err("Cannot set format on %d:%d", dev->fd, dir);
return ret;
}
int mfc_set_rate(struct io_dev *dev, int rate)
{
struct v4l2_streamparm fps;
int ret;
fps.type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
fps.parm.output.timeperframe.numerator = 1000;
fps.parm.output.timeperframe.denominator = rate;
ret = ioctl(dev->fd, VIDIOC_S_PARM, &fps);
if (ret != 0)
err("Cannot set rate on %d", dev->fd);
return ret;
}
int mfc_set_mpeg_control(struct io_dev *dev, int id, int value)
{
struct v4l2_ext_control ctrl;
struct v4l2_ext_controls ctrls;
int ret;
ctrl.id = id;
ctrl.value = value;
ctrls.ctrl_class = V4L2_CTRL_CLASS_MPEG;
ctrls.count = 1;
ctrls.controls = &ctrl;
ret = ioctl(dev->fd, VIDIOC_S_EXT_CTRLS, &ctrls);
if (ret < 0)
err("Cannot set control %d to %d on %d", id, value, dev->fd);
return ret;
}
int mfc_set_bitrate(struct io_dev *dev, int bitrate)
{
struct v4l2_ext_control ctrl;
struct v4l2_ext_controls ctrls;
int ret;
ctrl.id = V4L2_CID_MPEG_VIDEO_BITRATE;
ctrl.value = bitrate;
ctrls.ctrl_class = V4L2_CTRL_CLASS_MPEG;
ctrls.count = 1;
ctrls.controls = &ctrl;
ret = ioctl(dev->fd, VIDIOC_S_EXT_CTRLS, &ctrls);
if (ret < 0)
err("Cannot set bitrate on %d", dev->fd);
return ret;
}
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