Commit ed8404bb authored by bigben's avatar bigben
Browse files

* Very first beginning of a v4l2 access-demux

* Does nothing useful at the moment (only useless device probing)
* The purpose would be to make an access-demux and an access sub-module reusing part of the code
* Access to a webcam or an analog card without an encoder (bt878) would help the development

parent 8c8624b4
......@@ -1995,6 +1995,28 @@ then
CPPFLAGS="${CPPFLAGS_save}"
fi
dnl
dnl Video4Linux plugin
dnl
AC_ARG_ENABLE(v4l2,
[ --enable-v4l Video4Linux2 input support (default disabled)])
if test "${enable_v4l2}" = "yes"
then
AC_ARG_WITH(v4l2,
[ --with-v4l2=PATH path to a v4l2-enabled kernel tree],[],[])
if test "${with_v4l2}" != "no" -a -n "${with_v4l2}"
then
VLC_ADD_CPPFLAGS([v4l2],[-I${with_v4l2}/include])
fi
CPPFLAGS="${CPPFLAGS_save} ${CPPFLAGS_v4l2}"
AC_CHECK_HEADERS(linux/videodev2.h, [
VLC_ADD_PLUGINS([v4l2])
],[])
CPPFLAGS="${CPPFLAGS_save}"
fi
dnl
dnl special access module for Hauppauge PVR cards
dnl
......
......@@ -12,6 +12,7 @@ SOURCES_dvdread = dvdread.c
SOURCES_access_fake = fake.c
SOURCES_pvr = pvr.c videodev2.h
SOURCES_v4l = v4l.c videodev_mjpeg.h
SOURCES_v4l2 = v4l2.c
SOURCES_cdda = \
cdda.c \
vcd/cdrom.c \
......
/*****************************************************************************
* v4l2.c : Video4Linux2 input module for vlc
*****************************************************************************
* Copyright (C) 2002-2004 the VideoLAN team
* $Id: v4l.c 16084 2006-07-19 09:45:02Z zorglub $
*
* Author: Benjamin Pracht <bigben at videolan dot org>
*
* 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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA. *****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <vlc/vlc.h>
#include <vlc/input.h>
#include <vlc/vout.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <asm/types.h> /* for videodev2.h */
#include <linux/videodev2.h>
/*****************************************************************************
* Module descriptior
*****************************************************************************/
static int Open ( vlc_object_t * );
static void Close( vlc_object_t * );
#define DEV_TEXT N_("Device name")
#define DEV_LONGTEXT N_( \
"Name of the device to use. " \
"If you don't specify anything, /dev/video0 will be used.")
vlc_module_begin();
set_shortname( _("Video4Linux2") );
set_description( _("Video4Linux2 input") );
set_category( CAT_INPUT );
set_subcategory( SUBCAT_INPUT_ACCESS );
add_string( "v4l2-dev", "/dev/video0", 0, DEV_TEXT, DEV_LONGTEXT,
VLC_FALSE );
add_shortcut( "v4l2" );
set_capability( "access_demux", 10 );
set_callbacks( Open, Close );
vlc_module_end();
/*****************************************************************************
* Access: local prototypes
*****************************************************************************/
static int Demux ( demux_t * );
static int Control( demux_t *, int, va_list );
static int OpenDev( demux_t * );
struct demux_sys_t
{
char *psz_device;
int i_fd_video;
struct v4l2_capability dev_cap;
int i_input;
struct v4l2_input *p_inputs;
int i_audio;
/* V4L2 devices cannot have more than 32 audio inputs */
struct v4l2_audio p_audios[32];
int i_tuner;
struct v4l2_tuner *p_tuners;
};
/*****************************************************************************
* Open: opens v4l device
*****************************************************************************
*
* url: <video device>::::
*
*****************************************************************************/
static int Open( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t*)p_this;
demux_sys_t *p_sys;
demux_sys_t sys;
/* Set up p_demux */
p_demux->pf_demux = Demux;
p_demux->pf_control = Control;
p_demux->info.i_update = 0;
p_demux->info.i_title = 0;
p_demux->info.i_seekpoint = 0;
p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
if( p_sys == NULL ) return VLC_ENOMEM;
memset( p_sys, 0, sizeof( demux_sys_t ) );
p_sys->psz_device = var_CreateGetString( p_demux, "v4l2-dev" );
if( OpenDev( p_demux ) < 0 ) return VLC_EGENERIC;
return VLC_SUCCESS;
}
/*****************************************************************************
* Close: close device, free resources
*****************************************************************************/
static void Close( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t *)p_this;
demux_sys_t *p_sys = p_demux->p_sys;
if( p_sys->psz_device ) free( p_sys->psz_device );
if( p_sys->p_inputs ) free( p_sys->p_inputs );
free( p_sys );
}
/*****************************************************************************
* Control:
*****************************************************************************/
static int Control( demux_t *p_demux, int i_query, va_list args )
{
}
/*****************************************************************************
* Demux:
*****************************************************************************/
static int Demux( demux_t *p_demux )
{
}
/*****************************************************************************
* OpenDev: open the device and probe for capabilities
*****************************************************************************/
int OpenDev( demux_t *p_demux )
{
int i_device_index;
int i_fd;
demux_sys_t *p_sys = p_demux->p_sys;
if( ( i_fd = open( p_sys->psz_device, O_RDWR ) ) < 0 )
{
msg_Err( p_demux, "cannot open device (%s)", strerror( errno ) );
goto open_failed;
}
/* Get device capabilites */
if( ioctl( i_fd, VIDIOC_QUERYCAP, &p_sys->dev_cap ) < 0 )
{
msg_Err( p_demux, "cannot get capabilities (%s)", strerror( errno ) );
goto open_failed;
}
msg_Dbg( p_demux, "V4L2 device: %s using driver: %s (version: %u.%u.%u) on %s",
p_sys->dev_cap.card,
p_sys->dev_cap.driver,
(p_sys->dev_cap.version >> 16) & 0xFF,
(p_sys->dev_cap.version >> 8) & 0xFF,
p_sys->dev_cap.version & 0xFF,
p_sys->dev_cap.bus_info );
msg_Dbg( p_demux, "The device has the capabilities: (%c) Video Capure, "
"(%c) Audio, "
"(%c) Tuner",
( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE ? 'X':' '),
( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO ? 'X':' '),
( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER ? 'X':' ') );
/* Now, enumerate all the video inputs. This is useless at the moment
since we have no way to present that info to the user except with
debug messages */
if( p_sys->dev_cap.capabilities & V4L2_CAP_VIDEO_CAPTURE )
{
while( ioctl( i_fd, VIDIOC_S_INPUT, &p_sys->i_input ) >= 0 )
{
p_sys->i_input++;
}
p_sys->p_inputs = malloc( p_sys->i_input * sizeof( struct v4l2_input ) );
if( !p_sys->p_inputs ) goto open_failed;
memset( p_sys->p_inputs, 0, sizeof( struct v4l2_input ) );
for( i_device_index = 0; i_device_index < p_sys->i_input; i_device_index++ )
{
p_sys->p_inputs[i_device_index].index = i_device_index;
if( ioctl( i_fd, VIDIOC_ENUMINPUT, &p_sys->p_inputs[i_device_index] ) )
{
msg_Err( p_demux, "cannot get video input characteristics (%s)",
strerror( errno ) );
goto open_failed;
}
msg_Dbg( p_demux, "Video input %i (%s) has type: %s",
i_device_index,
p_sys->p_inputs[i_device_index].name,
p_sys->p_inputs[i_device_index].type
== V4L2_INPUT_TYPE_TUNER ?
"Tuner adapter" :
"External analog input" );
}
}
/* initialize the structures for the ioctls */
for( i_device_index = 0; i_device_index < 32; i_device_index++ )
{
p_sys->p_audios[i_device_index].index = i_device_index;
}
/* Probe audio inputs */
if( p_sys->dev_cap.capabilities & V4L2_CAP_AUDIO )
{
while( p_sys->i_audio < 32 &&
ioctl( i_fd, VIDIOC_S_AUDIO, &p_sys->p_audios[p_sys->i_audio] ) >= 0 )
{
if( ioctl( i_fd, VIDIOC_G_AUDIO, &p_sys->p_audios[ p_sys->i_audio] ) < 0 )
{
msg_Err( p_demux, "cannot get video input characteristics (%s)",
strerror( errno ) );
goto open_failed;
}
msg_Dbg( p_demux, "Audio device %i (%s) is %s",
p_sys->i_audio,
p_sys->p_audios[p_sys->i_audio].name,
p_sys->p_audios[p_sys->i_audio].capability &
V4L2_AUDCAP_STEREO ?
"Stereo" : "Mono" );
p_sys->i_audio++;
}
}
if( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER )
{
struct v4l2_tuner tuner;
memset( &tuner, 0, sizeof( struct v4l2_tuner ) );
while( ioctl( i_fd, VIDIOC_S_TUNER, &tuner ) >= 0 )
{
p_sys->i_tuner++;
tuner.index = p_sys->i_tuner;
}
p_sys->p_tuners = malloc( p_sys->i_tuner * sizeof( struct v4l2_tuner ) );
if( !p_sys->p_tuners ) goto open_failed;
memset( p_sys->p_tuners, 0, sizeof( struct v4l2_tuner ) );
for( i_device_index = 0; i_device_index < p_sys->i_tuner; i_device_index++ )
{
p_sys->p_tuners[i_device_index].index = i_device_index;
if( ioctl( i_fd, VIDIOC_G_TUNER, &p_sys->p_tuners[i_device_index] ) )
{
msg_Err( p_demux, "cannot get tuner characteristics (%s)",
strerror( errno ) );
goto open_failed;
}
msg_Dbg( p_demux, "Tuner %i (%s) has type: %s, "
"frequency range: %.1f %s -> %.1f %s",
i_device_index,
p_sys->p_tuners[i_device_index].name,
p_sys->p_tuners[i_device_index].type
== V4L2_TUNER_RADIO ?
"Radio" : "Analog TV",
p_sys->p_tuners[i_device_index].rangelow * 62.5,
p_sys->p_tuners[i_device_index].capability &
V4L2_TUNER_CAP_LOW ?
"Hz" : "kHz",
p_sys->p_tuners[i_device_index].rangehigh * 62.5,
p_sys->p_tuners[i_device_index].capability &
V4L2_TUNER_CAP_LOW ?
"Hz" : "kHz" );
}
}
if( i_fd >= 0 ) close( i_fd );
return VLC_SUCCESS;
open_failed:
if( i_fd >= 0 ) close( i_fd );
return VLC_EGENERIC;
}
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