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vlc-2-2
Commit abb67751 authored by Antoine Cellerier's avatar Antoine Cellerier
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v4l2: rutime libv4l2 support 

If compiled with libv4l2 support, first try using the kernel v4l2 api
and then fallback to libv4l2 if it didn't work. You can force using
libv4l2 with --v4l2-use-libv4l2. (libv4l2 broke the v4l2 access for
some people. This should be backported to 0.9.9)
parent 084f6f0b
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Showing with 118 additions and 37 deletions
modules/access/v4l2.c
View file @ abb67751
......@@ -54,13 +54,6 @@
#ifdef HAVE_LIBV4L2
# include <libv4l2.h>
#else
# define v4l2_close close
# define v4l2_dup dup
# define v4l2_ioctl ioctl
# define v4l2_read read
# define v4l2_mmap mmap
# define v4l2_munmap munmap
#endif
/*****************************************************************************
......@@ -100,6 +93,12 @@ static void AccessClose( vlc_object_t * );
#define FPS_LONGTEXT N_( "Framerate to capture, if applicable " \
"(0 for autodetect)." )
#ifdef HAVE_LIBV4L2
#define LIBV4L2_TEXT N_( "Use libv4l2" )
#define LIBV4L2_LONGTEXT N_( \
"Force usage of the libv4l2 wrapper." )
#endif
#define CTRL_RESET_TEXT N_( "Reset v4l2 controls" )
#define CTRL_RESET_LONGTEXT N_( \
"Reset controls to defaults provided by the v4l2 driver." )
......@@ -261,6 +260,9 @@ vlc_module_begin ()
add_float( CFG_PREFIX "fps", 0, NULL, FPS_TEXT, FPS_LONGTEXT, true )
add_integer( CFG_PREFIX "caching", DEFAULT_PTS_DELAY / 1000, NULL,
CACHING_TEXT, CACHING_LONGTEXT, true )
#ifdef HAVE_LIBV4L2
add_bool( CFG_PREFIX "use-libv4l2", false, NULL, LIBV4L2_TEXT, LIBV4L2_LONGTEXT, true );
#endif
set_section( N_( "Tuner" ), NULL )
add_integer( CFG_PREFIX "tuner", 0, NULL, TUNER_TEXT, TUNER_LONGTEXT,
......@@ -370,8 +372,8 @@ static int OpenVideoDev( vlc_object_t *, demux_sys_t *, bool );
static bool ProbeVideoDev( vlc_object_t *, demux_sys_t *,
const char *psz_device );
static int ControlList( vlc_object_t *, int , bool, bool );
static int Control( vlc_object_t *, int i_fd,
static int ControlList( vlc_object_t *, demux_sys_t *, int , bool, bool );
static int Control( vlc_object_t *, demux_sys_t *, int i_fd,
const char *psz_name, int i_cid, int i_value );
static int DemuxControlCallback( vlc_object_t *p_this, const char *psz_var,
......@@ -534,8 +536,55 @@ struct demux_sys_t
/* Controls */
char *psz_set_ctrls;
#ifdef HAVE_LIBV4L2
/* */
int (*pf_close)( int );
int (*pf_dup)( int );
int (*pf_ioctl)( int, unsigned long int, ... );
ssize_t (*pf_read)( int, void *, size_t );
void *(*pf_mmap)( void *, size_t, int, int, int, off_t );
int (*pf_munmap)( void *, size_t );
#endif
};
#ifdef HAVE_LIBV4L2
static void use_kernel_v4l2( demux_sys_t *p_sys )
{
p_sys->pf_close = close;
p_sys->pf_dup = dup;
p_sys->pf_ioctl = ioctl;
p_sys->pf_read = read;
p_sys->pf_mmap = mmap;
p_sys->pf_munmap = munmap;
}
static void use_libv4l2( demux_sys_t *p_sys )
{
p_sys->pf_close = v4l2_close;
p_sys->pf_dup = v4l2_dup;
p_sys->pf_ioctl = v4l2_ioctl;
p_sys->pf_read = v4l2_read;
p_sys->pf_mmap = v4l2_mmap;
p_sys->pf_munmap = v4l2_munmap;
}
# define v4l2_close (p_sys->pf_close)
# define v4l2_dup (p_sys->pf_dup)
# define v4l2_ioctl (p_sys->pf_ioctl)
# define v4l2_read (p_sys->pf_read)
# define v4l2_mmap (p_sys->pf_mmap)
# define v4l2_munmap (p_sys->pf_munmap)
#else
# define v4l2_close close
# define v4l2_dup dup
# define v4l2_ioctl ioctl
# define v4l2_read read
# define v4l2_mmap mmap
# define v4l2_munmap munmap
#endif
static int FindMainDevice( vlc_object_t *p_this, demux_sys_t *p_sys,
bool b_demux )
{
......@@ -582,13 +631,23 @@ static int DemuxOpen( vlc_object_t *p_this )
ParseMRL( p_sys, p_demux->psz_path, (vlc_object_t *) p_demux );
if( FindMainDevice( p_this, p_sys, true ) != VLC_SUCCESS)
#ifdef HAVE_LIBV4L2
if( !config_GetInt( p_this, CFG_PREFIX "use-libv4l2" ) )
{
DemuxClose( p_this );
return VLC_EGENERIC;
msg_Dbg( p_this, "Trying direct kernel v4l2" );
use_kernel_v4l2( p_sys );
if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
return VLC_SUCCESS;
}
return VLC_SUCCESS;
msg_Dbg( p_this, "Trying libv4l2 wrapper" );
use_libv4l2( p_sys );
#endif
if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
return VLC_SUCCESS;
DemuxClose( p_this );
return VLC_EGENERIC;
}
/*****************************************************************************
......@@ -1001,13 +1060,23 @@ static int AccessOpen( vlc_object_t * p_this )
ParseMRL( p_sys, p_access->psz_path, (vlc_object_t *) p_access );
if( FindMainDevice( p_this, p_sys, false ) != VLC_SUCCESS )
#ifdef HAVE_LIBV4L2
if( !config_GetInt( p_this, CFG_PREFIX "use-libv4l2" ) )
{
AccessClose( p_this );
return VLC_EGENERIC;
msg_Dbg( p_this, "Trying direct kernel v4l2" );
use_kernel_v4l2( p_sys );
if( FindMainDevice( p_this, p_sys, true ) == VLC_SUCCESS)
return VLC_SUCCESS;
}
return VLC_SUCCESS;
msg_Dbg( p_this, "Trying libv4l2 wrapper" );
use_libv4l2( p_sys );
#endif
if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS )
return VLC_SUCCESS;
AccessClose( p_this );
return VLC_EGENERIC;
}
/*****************************************************************************
......@@ -1482,6 +1551,9 @@ static float GetMaxFrameRate( demux_t *p_demux, int i_fd,
{
(void)p_demux;
#ifdef VIDIOC_ENUM_FRAMEINTERVALS
#ifdef HAVE_LIBV4L2
demux_sys_t *p_sys = p_demux->p_sys;
#endif
/* This is new in Linux 2.6.19 */
struct v4l2_frmivalenum frmival;
frmival.index = 0;
......@@ -1522,6 +1594,9 @@ static float GetAbsoluteMaxFrameRate( demux_t *p_demux, int i_fd,
{
float f_fps_max = -1.;
#ifdef VIDIOC_ENUM_FRAMESIZES
#ifdef HAVE_LIBV4L2
demux_sys_t *p_sys = p_demux->p_sys;
#endif
/* This is new in Linux 2.6.19 */
struct v4l2_frmsizeenum frmsize;
frmsize.index = 0;
......@@ -1580,6 +1655,9 @@ static void GetMaxDimensions( demux_t *p_demux, int i_fd,
*pi_width = 0;
*pi_height = 0;
#ifdef VIDIOC_ENUM_FRAMESIZES
#ifdef HAVE_LIBV4L2
demux_sys_t *p_sys = p_demux->p_sys;
#endif
/* This is new in Linux 2.6.19 */
struct v4l2_frmsizeenum frmsize;
frmsize.index = 0;
......@@ -1769,7 +1847,7 @@ static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
/* TODO: Move the resolution stuff up here */
/* if MPEG encoder card, no need to do anything else after this */
ControlList( p_obj, i_fd,
ControlList( p_obj, p_sys, i_fd,
var_GetBool( p_obj, "v4l2-controls-reset" ), b_demux );
SetAvailControlsByString( p_obj, p_sys, i_fd );
if( false == b_demux)
......@@ -2444,7 +2522,7 @@ static void name2var( unsigned char *name )
* Print a user-class v4l2 control's details, create the relevant variable,
* change the value if needed.
*****************************************************************************/
static void ControlListPrint( vlc_object_t *p_obj, int i_fd,
static void ControlListPrint( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
struct v4l2_queryctrl queryctrl,
bool b_reset, bool b_demux )
{
......@@ -2563,14 +2641,14 @@ static void ControlListPrint( vlc_object_t *p_obj, int i_fd,
if( b_reset && queryctrl.default_value != control.value )
{
msg_Dbg( p_obj, " reset value to default" );
Control( p_obj, i_fd, psz_name,
queryctrl.id, queryctrl.default_value );
Control( p_obj, p_sys, i_fd, psz_name,
queryctrl.id, queryctrl.default_value );
}
}
else
{
Control( p_obj, i_fd, psz_name,
queryctrl.id, i_val );
Control( p_obj, p_sys, i_fd, psz_name,
queryctrl.id, i_val );
}
}
break;
......@@ -2618,7 +2696,7 @@ static void ControlListPrint( vlc_object_t *p_obj, int i_fd,
* List all user-class v4l2 controls, set them to the user specified
* value and create the relevant variables to enable runtime changes
*****************************************************************************/
static int ControlList( vlc_object_t *p_obj, int i_fd,
static int ControlList( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
bool b_reset, bool b_demux )
{
struct v4l2_queryctrl queryctrl;
......@@ -2680,7 +2758,7 @@ static int ControlList( vlc_object_t *p_obj, int i_fd,
queryctrl.name, queryctrl.id );
break;
}
ControlListPrint( p_obj, i_fd, queryctrl, b_reset, b_demux );
ControlListPrint( p_obj, p_sys, i_fd, queryctrl, b_reset, b_demux );
queryctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
}
}
......@@ -2700,7 +2778,8 @@ static int ControlList( vlc_object_t *p_obj, int i_fd,
continue;
msg_Dbg( p_obj, "Available control: %s (%x)",
queryctrl.name, queryctrl.id );
ControlListPrint( p_obj, i_fd, queryctrl, b_reset, b_demux );
ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
b_reset, b_demux );
}
}
......@@ -2716,7 +2795,8 @@ static int ControlList( vlc_object_t *p_obj, int i_fd,
continue;
msg_Dbg( p_obj, "Available private control: %s (%x)",
queryctrl.name, queryctrl.id );
ControlListPrint( p_obj, i_fd, queryctrl, b_reset, b_demux );
ControlListPrint( p_obj, p_sys, i_fd, queryctrl,
b_reset, b_demux );
}
else
break;
......@@ -2784,7 +2864,7 @@ static void SetAvailControlsByString( vlc_object_t *p_obj, demux_sys_t *p_sys,
if( !strncasecmp( psz_name, psz_parser, i_maxstrlen ) )
{
Control( p_obj, i_fd, psz_name, i_cid,
Control( p_obj, p_sys, i_fd, psz_name, i_cid,
strtol( ++psz_assign, &psz_parser, 0) );
}
}
......@@ -2802,7 +2882,7 @@ static void SetAvailControlsByString( vlc_object_t *p_obj, demux_sys_t *p_sys,
/*****************************************************************************
* Reset all user-class v4l2 controls to their default value
*****************************************************************************/
static int ControlReset( vlc_object_t *p_obj, int i_fd )
static int ControlReset( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd )
{
struct v4l2_queryctrl queryctrl;
int i_cid;
......@@ -2831,7 +2911,7 @@ static int ControlReset( vlc_object_t *p_obj, int i_fd )
for( i = 0; controls[i].psz_name != NULL; i++ )
if( controls[i].i_cid == queryctrl.id ) break;
name2var( queryctrl.name );
Control( p_obj, i_fd,
Control( p_obj, p_sys, i_fd,
controls[i].psz_name ? : (const char *)queryctrl.name,
queryctrl.id, queryctrl.default_value );
}
......@@ -2861,7 +2941,7 @@ static int ControlReset( vlc_object_t *p_obj, int i_fd )
for( i = 0; controls[i].psz_name != NULL; i++ )
if( controls[i].i_cid == queryctrl.id ) break;
name2var( queryctrl.name );
Control( p_obj, i_fd,
Control( p_obj, p_sys, i_fd,
controls[i].psz_name ? : (const char *)queryctrl.name,
queryctrl.id, queryctrl.default_value );
}
......@@ -2885,7 +2965,7 @@ static int ControlReset( vlc_object_t *p_obj, int i_fd )
&& queryctrl.default_value != control.value )
{
name2var( queryctrl.name );
Control( p_obj, i_fd, (const char *)queryctrl.name,
Control( p_obj, p_sys, i_fd, (const char *)queryctrl.name,
queryctrl.id, queryctrl.default_value );
}
}
......@@ -2899,9 +2979,10 @@ static int ControlReset( vlc_object_t *p_obj, int i_fd )
/*****************************************************************************
* Issue user-class v4l2 controls
*****************************************************************************/
static int Control( vlc_object_t *p_obj, int i_fd,
static int Control( vlc_object_t *p_obj, demux_sys_t *p_sys, int i_fd,
const char *psz_name, int i_cid, int i_value )
{
(void)p_sys;
struct v4l2_queryctrl queryctrl;
struct v4l2_control control;
struct v4l2_ext_control ext_control;
......@@ -2991,7 +3072,7 @@ static int DemuxControlCallback( vlc_object_t *p_this,
if( i_fd < 0 )
return VLC_EGENERIC;
Control( p_this, i_fd, psz_var, i_cid, newval.i_int );
Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
return VLC_EGENERIC;
}
......@@ -3008,7 +3089,7 @@ static int DemuxControlResetCallback( vlc_object_t *p_this,
if( i_fd < 0 )
return VLC_EGENERIC;
ControlReset( p_this, i_fd );
ControlReset( p_this, p_sys, i_fd );
return VLC_EGENERIC;
}
......@@ -3027,7 +3108,7 @@ static int AccessControlCallback( vlc_object_t *p_this,
if( i_fd < 0 )
return VLC_EGENERIC;
Control( p_this, i_fd, psz_var, i_cid, newval.i_int );
Control( p_this, p_sys, i_fd, psz_var, i_cid, newval.i_int );
return VLC_EGENERIC;
}
......@@ -3044,7 +3125,7 @@ static int AccessControlResetCallback( vlc_object_t *p_this,
if( i_fd < 0 )
return VLC_EGENERIC;
ControlReset( p_this, i_fd );
ControlReset( p_this, p_sys, i_fd );
return VLC_EGENERIC;
}
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