--- /dev/null
+/*****************************************************************************
+ * 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;
+
+}
projects / vlc / commitdiff