mpv/libvo/vo_v4l2.c

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/*
* video output for V4L2 hardware MPEG decoders
*
* Copyright (C) 2007 Benjamin Zores
*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <inttypes.h>
#include <linux/types.h>
#include <linux/videodev2.h>
#include <linux/ioctl.h>
#include "mp_msg.h"
#include "subopt-helper.h"
#include "video_out.h"
#include "video_out_internal.h"
#include "libmpdemux/mpeg_packetizer.h"
#define DEFAULT_MPEG_DECODER "/dev/video16"
#define V4L2_VO_HDR "VO: [v4l2]"
int v4l2_fd = -1;
static vo_mpegpes_t *pes;
/* suboptions */
static int output = -1;
static char *device = NULL;
static const opt_t subopts[] = {
{"output", OPT_ARG_INT, &output, (opt_test_f)int_non_neg},
{"device", OPT_ARG_MSTRZ, &device, NULL},
{NULL}
};
static const vo_info_t info =
{
"V4L2 MPEG Video Decoder Output",
"v4l2",
"Benjamin Zores",
""
};
const LIBVO_EXTERN (v4l2)
int
v4l2_write (unsigned char *data, int len)
{
if (v4l2_fd < 0)
return 0;
return write (v4l2_fd, data, len);
}
/* video out functions */
static int
config (uint32_t width, uint32_t height,
uint32_t d_width, uint32_t d_height,
uint32_t fullscreen, char *title, uint32_t format)
{
return 0;
}
static int
preinit (const char *arg)
{
struct v4l2_output vout;
struct v4l2_ext_controls ctrls;
int err;
if (subopt_parse (arg, subopts) != 0)
{
mp_msg (MSGT_VO, MSGL_FATAL,
"\n-vo v4l2 command line help:\n"
"Example: mplayer -vo v4l2:device=/dev/video16:output=2\n"
"\nOptions:\n"
" device=/dev/videoX\n"
" Name of the MPEG decoder device file.\n"
" output=<0-...>\n"
" V4L2 id of the TV output.\n"
"\n" );
return -1;
}
if (!device)
device = strdup (DEFAULT_MPEG_DECODER);
v4l2_fd = open (device, O_RDWR);
if (v4l2_fd < 0)
{
free (device);
mp_msg (MSGT_VO, MSGL_FATAL, "%s %s\n", V4L2_VO_HDR, strerror (errno));
return -1;
}
/* check for device hardware MPEG decoding capability */
ctrls.ctrl_class = V4L2_CTRL_CLASS_MPEG;
ctrls.count = 0;
ctrls.controls = NULL;
if (ioctl (v4l2_fd, VIDIOC_G_EXT_CTRLS, &ctrls) < 0)
{
free (device);
mp_msg (MSGT_OPEN, MSGL_FATAL, "%s %s\n", V4L2_VO_HDR, strerror (errno));
return -1;
}
/* list available outputs */
vout.index = 0;
err = 1;
mp_msg (MSGT_VO, MSGL_INFO, "%s Available video outputs: ", V4L2_VO_HDR);
while (ioctl (v4l2_fd, VIDIOC_ENUMOUTPUT, &vout) >= 0)
{
err = 0;
mp_msg (MSGT_VO, MSGL_INFO, "'#%d, %s' ", vout.index, vout.name);
vout.index++;
}
if (err)
{
mp_msg (MSGT_VO, MSGL_INFO, "none\n");
free (device);
return -1;
}
else
mp_msg (MSGT_VO, MSGL_INFO, "\n");
/* set user specified output */
if (output != -1)
{
if (ioctl (v4l2_fd, VIDIOC_S_OUTPUT, &output) < 0)
{
mp_msg (MSGT_VO, MSGL_ERR,
"%s can't set output (%s)\n", V4L2_VO_HDR, strerror (errno));
free (device);
return -1;
}
}
/* display device name */
mp_msg (MSGT_VO, MSGL_INFO, "%s using %s\n", V4L2_VO_HDR, device);
free (device);
/* display current video output */
if (ioctl (v4l2_fd, VIDIOC_G_OUTPUT, &output) == 0)
{
vout.index = output;
if (ioctl (v4l2_fd, VIDIOC_ENUMOUTPUT, &vout) < 0)
{
mp_msg (MSGT_VO, MSGL_ERR,
"%s can't get output (%s).\n", V4L2_VO_HDR, strerror (errno));
return -1;
}
else
mp_msg (MSGT_VO, MSGL_INFO,
"%s video output: %s\n", V4L2_VO_HDR, vout.name);
}
else
{
mp_msg (MSGT_VO, MSGL_ERR,
"%s can't get output (%s).\n", V4L2_VO_HDR, strerror (errno));
return -1;
}
return 0;
}
static void
draw_osd (void)
{
/* do nothing */
}
static int
draw_frame (uint8_t * src[])
{
pes = (vo_mpegpes_t *) src[0];
return 0;
}
static void
flip_page (void)
{
if (v4l2_fd < 0)
return;
if (!pes)
return;
send_mpeg_pes_packet (pes->data, pes->size, pes->id,
pes->timestamp ? pes->timestamp : vo_pts, 2,
v4l2_write);
/* ensure flip_page() won't be called twice */
pes = NULL;
}
static int
draw_slice (uint8_t *image[], int stride[], int w, int h, int x, int y)
{
return 0;
}
static void
uninit (void)
{
if (v4l2_fd < 0)
return;
/* close device */
close (v4l2_fd);
v4l2_fd = -1;
}
static void
check_events (void)
{
/* do nothing */
}
static int
query_format (uint32_t format)
{
if (format != IMGFMT_MPEGPES)
return 0;
return VFCAP_CSP_SUPPORTED | VFCAP_CSP_SUPPORTED_BY_HW | VFCAP_TIMER;
}
static int
control (uint32_t request, void *data, ...)
{
switch (request)
{
case VOCTRL_QUERY_FORMAT:
return query_format (*((uint32_t*) data));
}
return VO_NOTIMPL;
}