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Commit 9cf37a2c authored by Antoine Cellerier's avatar Antoine Cellerier
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v4l2 fixes 

 * Don't reset cropping when it doesn't make sense (ie fm tuners)
 * When used as an access with the read method, behave as a stream access and not a block access
 * Automatically probe authorised input methods (== if mmap isn't supported but read is, fallback to read)
parent 0a090e33
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Showing with 122 additions and 22 deletions
modules/access/v4l2.c
View file @ 9cf37a2c
......@@ -209,6 +209,7 @@ static void AccessClose( vlc_object_t * );
#define ASPECT_LONGTEXT N_("Define input picture aspect-ratio to use. Default is 4:3" )
typedef enum {
IO_METHOD_AUTO,
IO_METHOD_READ,
IO_METHOD_MMAP,
IO_METHOD_USERPTR,
......@@ -220,9 +221,9 @@ static const char *const psz_standards_list_text[] =
{ N_("Default"), N_("SECAM"), N_("PAL"), N_("NTSC") };
static const int i_iomethod_list[] =
{ IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR };
{ IO_METHOD_AUTO, IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR };
static const char *const psz_iomethod_list_text[] =
{ N_("READ"), N_("MMAP"), N_("USERPTR") };
{ N_("AUTO"), N_("READ"), N_("MMAP"), N_("USERPTR") };
static const int i_tuner_audio_modes_list[] =
{ V4L2_TUNER_MODE_MONO, V4L2_TUNER_MODE_STEREO,
......@@ -255,7 +256,7 @@ vlc_module_begin ()
true )
add_integer( CFG_PREFIX "audio-input", 0, NULL, AUDIO_INPUT_TEXT,
AUDIO_INPUT_LONGTEXT, true )
add_integer( CFG_PREFIX "io", IO_METHOD_MMAP, NULL, IOMETHOD_TEXT,
add_integer( CFG_PREFIX "io", IO_METHOD_AUTO, NULL, IOMETHOD_TEXT,
IOMETHOD_LONGTEXT, true )
change_integer_list( i_iomethod_list, psz_iomethod_list_text, NULL )
add_integer( CFG_PREFIX "width", -1, NULL, WIDTH_TEXT,
......@@ -369,6 +370,7 @@ static int AccessControl( access_t *, int, va_list );
static int Demux( demux_t * );
static block_t *AccessRead( access_t * );
static ssize_t AccessReadStream( access_t * p_access, uint8_t * p_buffer, size_t i_len );
static block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys );
static block_t* ProcessVideoFrame( vlc_object_t *p_demux, uint8_t *p_frame, size_t );
......@@ -812,6 +814,11 @@ static void ParseMRL( demux_sys_t *p_sys, char *psz_path, vlc_object_t *p_obj )
p_sys->io = IO_METHOD_USERPTR;
psz_parser += strlen( "userptr" );
}
else if( !strncmp( psz_parser, "auto", strlen( "auto" ) ) )
{
p_sys->io = IO_METHOD_AUTO;
psz_parser += strlen( "auto" );
}
else
{
p_sys->io = strtol( psz_parser, &psz_parser, 0 );
......@@ -1020,6 +1027,9 @@ static void DemuxClose( vlc_object_t *p_this )
}
break;
default:
break;
}
}
......@@ -1047,6 +1057,9 @@ static void DemuxClose( vlc_object_t *p_this )
free( p_sys->p_buffers[i].start );
}
break;
default:
break;
}
free( p_sys->p_buffers );
}
......@@ -1086,7 +1099,6 @@ static int AccessOpen( vlc_object_t * p_this )
if( *p_access->psz_access == '\0' ) return VLC_EGENERIC;
access_InitFields( p_access );
ACCESS_SET_CALLBACKS( NULL, AccessRead, AccessControl, NULL );
p_sys = calloc( 1, sizeof( demux_sys_t ));
if( !p_sys ) return VLC_ENOMEM;
p_access->p_sys = (access_sys_t*)p_sys;
......@@ -1101,14 +1113,26 @@ static int AccessOpen( vlc_object_t * p_this )
msg_Dbg( p_this, "Trying direct kernel v4l2" );
use_kernel_v4l2( p_sys );
if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS)
{
if( p_sys->io == IO_METHOD_READ )
ACCESS_SET_CALLBACKS( AccessReadStream, NULL, AccessControl, NULL );
else
ACCESS_SET_CALLBACKS( NULL, AccessRead, AccessControl, NULL );
return VLC_SUCCESS;
}
}
msg_Dbg( p_this, "Trying libv4l2 wrapper" );
use_libv4l2( p_sys );
#endif
if( FindMainDevice( p_this, p_sys, false ) == VLC_SUCCESS )
{
if( p_sys->io == IO_METHOD_READ )
ACCESS_SET_CALLBACKS( AccessReadStream, NULL, AccessControl, NULL );
else
ACCESS_SET_CALLBACKS( NULL, AccessRead, AccessControl, NULL );
return VLC_SUCCESS;
}
AccessClose( p_this );
return VLC_EGENERIC;
......@@ -1211,6 +1235,46 @@ static block_t *AccessRead( access_t * p_access )
return NULL;
}
static ssize_t AccessReadStream( access_t * p_access, uint8_t * p_buffer, size_t i_len )
{
demux_sys_t *p_sys = (demux_sys_t *) p_access->p_sys;
struct pollfd ufd;
int i_ret;
ufd.fd = p_sys->i_fd;
ufd.events = POLLIN;
if( p_access->info.b_eof )
return 0;
do
{
if( !vlc_object_alive (p_access) )
return 0;
ufd.revents = 0;
}
while( ( i_ret = poll( &ufd, 1, 500 ) ) == 0 );
if( i_ret < 0 )
{
msg_Err( p_access, "Polling error (%m)." );
return -1;
}
i_ret = v4l2_read( p_sys->i_fd, p_buffer, i_len );
if( i_ret == 0 )
{
p_access->info.b_eof = true;
}
else if( i_ret > 0 )
{
p_access->info.i_pos += i_ret;
}
return i_ret;
}
/*****************************************************************************
* Demux: Processes the audio or video frame
*****************************************************************************/
......@@ -1369,6 +1433,8 @@ static block_t* GrabVideo( vlc_object_t *p_demux, demux_sys_t *p_sys )
break;
default:
break;
}
/* Timestamp */
......@@ -1855,6 +1921,7 @@ static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
msg_Err( p_obj, "device does not support read i/o" );
goto open_failed;
}
msg_Dbg( p_obj, "using read i/o" );
break;
case IO_METHOD_MMAP:
......@@ -1864,6 +1931,10 @@ static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
msg_Err( p_obj, "device does not support streaming i/o" );
goto open_failed;
}
if( p_sys->io == IO_METHOD_MMAP )
msg_Dbg( p_obj, "using streaming i/o (mmap)" );
else
msg_Dbg( p_obj, "using streaming i/o (userptr)" );
break;
default:
......@@ -1878,6 +1949,8 @@ static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
{
crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
crop.c = cropcap.defrect; /* reset to default */
if( crop.c.width > 0 && crop.c.height > 0 ) /* Fix for fm tuners */
{
if( v4l2_ioctl( i_fd, VIDIOC_S_CROP, &crop ) < 0 )
{
switch( errno )
......@@ -1891,6 +1964,7 @@ static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
}
}
}
}
/* Try and find default resolution if not specified */
memset( &fmt, 0, sizeof(fmt) );
......@@ -2140,6 +2214,7 @@ static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
switch( p_sys->io )
{
case IO_METHOD_READ:
if( b_demux )
if( InitRead( p_obj, p_sys, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
break;
......@@ -2151,8 +2226,13 @@ static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
if( InitUserP( p_obj, p_sys, i_fd, fmt.fmt.pix.sizeimage ) != VLC_SUCCESS ) goto open_failed;
break;
default:
goto open_failed;
break;
}
if( b_demux )
{
/* Add */
es_fmt.video.i_width = p_sys->i_width;
es_fmt.video.i_height = p_sys->i_height;
......@@ -2160,8 +2240,6 @@ static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
/* Get aspect-ratio */
es_fmt.video.i_aspect = p_sys->i_aspect;
if( b_demux )
{
demux_t *p_demux = (demux_t *) p_obj;
msg_Dbg( p_demux, "added new video es %4.4s %dx%d",
(char*)&es_fmt.i_codec, es_fmt.video.i_width, es_fmt.video.i_height );
......@@ -2229,6 +2307,10 @@ static int OpenVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys, bool b_demux )
}
break;
default:
goto open_failed;
break;
}
/* report fps */
......@@ -2296,10 +2378,12 @@ static bool ProbeVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys,
msg_Dbg( p_obj, "the device has the capabilities: (%c) Video Capure, "
"(%c) Audio, "
"(%c) Tuner",
"(%c) Tuner, "
"(%c) Radio",
( 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':' ') );
( p_sys->dev_cap.capabilities & V4L2_CAP_TUNER ? 'X':' '),
( p_sys->dev_cap.capabilities & V4L2_CAP_RADIO ? 'X':' ') );
msg_Dbg( p_obj, "supported I/O methods are: (%c) Read/Write, "
"(%c) Streaming, "
......@@ -2308,6 +2392,22 @@ static bool ProbeVideoDev( vlc_object_t *p_obj, demux_sys_t *p_sys,
( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING ? 'X':' ' ),
( p_sys->dev_cap.capabilities & V4L2_CAP_ASYNCIO ? 'X':' ' ) );
if( p_sys->io == IO_METHOD_AUTO )
{
if( p_sys->dev_cap.capabilities & V4L2_CAP_STREAMING )
{
msg_Err(p_obj, "Set p_sys->io to MMAP" );
p_sys->io = IO_METHOD_MMAP;
}
else if( p_sys->dev_cap.capabilities & V4L2_CAP_READWRITE )
{
msg_Err(p_obj, "Set p_sys->io to READ" );
p_sys->io = IO_METHOD_READ;
}
else
msg_Err( p_obj, "No known I/O method supported" );
}
/* 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 */
......
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