videolan
/
vlc
mirror of https://gitea.goldendeliverer.com/videolan/vlc.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
61928 Commits
7 Branches
132 Tags
718 MiB
 
 
 
 
 
 
Tree: 4e84bd2cef
Branches Tags
${ item.name }
Create tag ${ searchTerm }
Create branch ${ searchTerm }
from '4e84bd2cef'
${ noResults }
vlc/modules/access/linsys/linsys_sdi.c

1845 lines
60 KiB
Raw Blame History

/*****************************************************************************
* linsys_sdi.c: SDI capture for Linear Systems/Computer Modules cards
*****************************************************************************
* Copyright (C) 2009-2011 VideoLAN
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <poll.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
#include <limits.h>
#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_input.h>
#include <vlc_access.h>
#include <vlc_demux.h>
#include <vlc_fs.h>
#include "linsys_sdi.h"
#undef ZVBI_DEBUG
#include <libzvbi.h>
#define SDI_DEVICE "/dev/sdirx%u"
#define SDI_BUFFERS_FILE "/sys/class/sdi/sdirx%u/buffers"
#define SDI_BUFSIZE_FILE "/sys/class/sdi/sdirx%u/bufsize"
#define SDI_MODE_FILE "/sys/class/sdi/sdirx%u/mode"
#define READ_TIMEOUT 80000
#define RESYNC_TIMEOUT 500000
#define CLOCK_GAP INT64_C(500000)
#define START_DATE INT64_C(4294967296)
#define DEMUX_BUFFER_SIZE 1350000
#define MAX_AUDIOS 4
#define SAMPLERATE_TOLERANCE 0.1f
/*****************************************************************************
* Module descriptor
*****************************************************************************/
#define LINK_TEXT N_("Link #")
#define LINK_LONGTEXT N_( \
"Allows you to set the desired link of the board for the capture (starting at 0)." )
#define VIDEO_TEXT N_("Video ID")
#define VIDEO_LONGTEXT N_( \
"Allows you to set the ES ID of the video." )
#define VIDEO_ASPECT_TEXT N_("Aspect ratio")
#define VIDEO_ASPECT_LONGTEXT N_( \
"Allows you to force the aspect ratio of the video." )
#define AUDIO_TEXT N_("Audio configuration")
#define AUDIO_LONGTEXT N_( \
"Allows you to set audio configuration (id=group,pair:id=group,pair...)." )
#define TELX_TEXT N_("Teletext configuration")
#define TELX_LONGTEXT N_( \
"Allows you to set Teletext configuration (id=line1-lineN with both fields)." )
#define TELX_LANG_TEXT N_("Teletext language")
#define TELX_LANG_LONGTEXT N_( \
"Allows you to set Teletext language (page=lang/type,...)." )
static int Open ( vlc_object_t * );
static void Close( vlc_object_t * );
static int DemuxOpen ( vlc_object_t * );
static void DemuxClose( vlc_object_t * );
vlc_module_begin()
set_description( N_("SDI Input") )
set_shortname( N_("SDI") )
set_category( CAT_INPUT )
set_subcategory( SUBCAT_INPUT_ACCESS )
add_integer( "linsys-sdi-link", 0,
LINK_TEXT, LINK_LONGTEXT, true )
add_integer( "linsys-sdi-id-video", 0, VIDEO_TEXT, VIDEO_LONGTEXT, true )
add_string( "linsys-sdi-aspect-ratio", "", VIDEO_ASPECT_TEXT,
VIDEO_ASPECT_LONGTEXT, true )
add_string( "linsys-sdi-audio", "0=1,1", AUDIO_TEXT, AUDIO_LONGTEXT, true )
add_string( "linsys-sdi-telx", "", TELX_TEXT, TELX_LONGTEXT, true )
add_string( "linsys-sdi-telx-lang", "", TELX_LANG_TEXT, TELX_LANG_LONGTEXT,
true )
set_capability( "access_demux", 0 )
add_shortcut( "linsys-sdi" )
set_callbacks( Open, Close )
add_submodule()
set_description( N_("SDI Demux") )
set_capability( "demux", 0 )
set_callbacks( DemuxOpen, DemuxClose )
vlc_module_end()
/*****************************************************************************
* Local prototypes
*****************************************************************************/
typedef struct sdi_audio_t
{
unsigned int i_group, i_pair;
/* SDI parser */
int32_t i_delay;
unsigned int i_rate;
uint8_t i_block_number;
int16_t *p_buffer;
unsigned int i_left_samples, i_right_samples, i_nb_samples, i_max_samples;
/* ES stuff */
int i_id;
es_out_id_t *p_es;
} sdi_audio_t;
enum {
STATE_NOSYNC,
STATE_STARTSYNC,
STATE_ANCSYNC,
STATE_LINESYNC,
STATE_ACTIVESYNC,
STATE_VBLANKSYNC,
STATE_PICSYNC,
STATE_SYNC,
};
struct demux_sys_t
{
/* device reader */
int i_fd;
unsigned int i_link;
uint8_t **pp_buffers;
unsigned int i_buffers, i_current_buffer;
unsigned int i_buffer_size;
/* SDI sync */
int i_state;
mtime_t i_last_state_change;
unsigned int i_anc_size, i_active_size, i_picture_size;
unsigned int i_line_offset, i_nb_lines;
/* SDI parser */
unsigned int i_line_buffer;
unsigned int i_current_line;
uint8_t *p_line_buffer;
block_t *p_current_picture;
uint8_t *p_y, *p_u, *p_v;
uint8_t *p_wss_buffer;
uint8_t *p_telx_buffer;
/* picture decoding */
unsigned int i_frame_rate, i_frame_rate_base;
unsigned int i_width, i_height, i_aspect, i_forced_aspect;
unsigned int i_block_size;
unsigned int i_telx_line, i_telx_count;
char *psz_telx, *psz_telx_lang;
bool b_hd, b_vbi;
vbi_raw_decoder rd_wss, rd_telx;
mtime_t i_next_date;
int i_incr;
/* ES stuff */
int i_id_video;
es_out_id_t *p_es_video;
sdi_audio_t p_audios[MAX_AUDIOS];
es_out_id_t *p_es_telx;
};
static int Control( demux_t *, int, va_list );
static int DemuxControl( demux_t *, int, va_list );
static int Demux( demux_t * );
static int DemuxDemux( demux_t * );
static int InitWSS( demux_t *p_demux );
static int InitTelx( demux_t *p_demux );
static int HandleSDBuffer( demux_t *p_demux, uint8_t *p_buffer,
unsigned int i_buffer_size );
static int InitCapture( demux_t *p_demux );
static void CloseCapture( demux_t *p_demux );
static int Capture( demux_t *p_demux );
/*****************************************************************************
* DemuxOpen:
*****************************************************************************/
static int DemuxOpen( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t *)p_this;
demux_sys_t *p_sys;
char *psz_parser;
/* Fill p_demux field */
p_demux->pf_demux = DemuxDemux;
p_demux->pf_control = DemuxControl;
p_demux->p_sys = p_sys = calloc( 1, sizeof( demux_sys_t ) );
if( unlikely(!p_sys ) )
return VLC_ENOMEM;
p_sys->i_state = STATE_NOSYNC;
p_sys->i_last_state_change = mdate();
/* SDI AR */
char *psz_ar = var_InheritString( p_demux, "linsys-sdi-aspect-ratio" );
if ( psz_ar != NULL )
{
psz_parser = strchr( psz_ar, ':' );
if ( psz_parser )
{
*psz_parser++ = '\0';
p_sys->i_forced_aspect = p_sys->i_aspect =
strtol( psz_ar, NULL, 0 ) * VOUT_ASPECT_FACTOR
/ strtol( psz_parser, NULL, 0 );
}
else
p_sys->i_forced_aspect = 0;
free( psz_ar );
}
/* */
p_sys->i_id_video = var_InheritInteger( p_demux, "linsys-sdi-id-video" );
/* Audio ES */
char *psz_string = psz_parser = var_InheritString( p_demux,
"linsys-sdi-audio" );
int i = 0;
while ( psz_parser != NULL && *psz_parser )
{
int i_id, i_group, i_pair;
char *psz_next = strchr( psz_parser, '=' );
if ( psz_next != NULL )
{
*psz_next = '\0';
i_id = strtol( psz_parser, NULL, 0 );
psz_parser = psz_next + 1;
}
else
i_id = 0;
psz_next = strchr( psz_parser, ':' );
if ( psz_next != NULL )
{
*psz_next = '\0';
psz_next++;
}
if ( sscanf( psz_parser, "%d,%d", &i_group, &i_pair ) == 2 )
{
p_sys->p_audios[i].i_group = i_group;
p_sys->p_audios[i].i_pair = i_pair;
p_sys->p_audios[i].i_id = i_id;
i++;
}
else
msg_Warn( p_demux, "malformed audio configuration (%s)",
psz_parser );
psz_parser = psz_next;
}
free( psz_string );
/* Teletext ES */
p_sys->psz_telx = var_InheritString( p_demux, "linsys-sdi-telx" );
p_sys->psz_telx_lang = var_InheritString( p_demux, "linsys-sdi-telx-lang" );
return VLC_SUCCESS;
}
static int Open( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t *)p_this;
demux_sys_t *p_sys;
int i_ret;
if ( (i_ret = DemuxOpen( p_this )) != VLC_SUCCESS )
return i_ret;
/* Fill p_demux field */
p_demux->pf_demux = Demux;
p_demux->pf_control = Control;
p_sys = p_demux->p_sys;
p_sys->i_link = var_InheritInteger( p_demux, "linsys-sdi-link" );
if( InitCapture( p_demux ) != VLC_SUCCESS )
{
free( p_sys );
return VLC_EGENERIC;
}
return VLC_SUCCESS;
}
/*****************************************************************************
* DemuxClose:
*****************************************************************************/
static void DemuxClose( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t *)p_this;
demux_sys_t *p_sys = p_demux->p_sys;
free( p_sys->psz_telx );
free( p_sys->psz_telx_lang );
free( p_sys );
}
static void Close( vlc_object_t *p_this )
{
demux_t *p_demux = (demux_t *)p_this;
CloseCapture( p_demux );
DemuxClose( p_this );
}
/*****************************************************************************
* DemuxDemux:
*****************************************************************************/
static int DemuxDemux( demux_t *p_demux )
{
block_t *p_block = stream_Block( p_demux->s, DEMUX_BUFFER_SIZE );
int i_ret;
if ( p_block == NULL )
return 0;
i_ret = HandleSDBuffer( p_demux, p_block->p_buffer, p_block->i_buffer );
block_Release( p_block );
return ( i_ret == VLC_SUCCESS );
}
static int Demux( demux_t *p_demux )
{
return ( Capture( p_demux ) == VLC_SUCCESS );
}
/*****************************************************************************
* Control:
*****************************************************************************/
static int DemuxControl( demux_t *p_demux, int i_query, va_list args )
{
return demux_vaControlHelper( p_demux->s, -1, -1, 270000000, 1, i_query,
args );
}
static int Control( demux_t *p_demux, int i_query, va_list args )
{
bool *pb;
int64_t *pi64;
switch( i_query )
{
/* Special for access_demux */
case DEMUX_CAN_PAUSE:
case DEMUX_CAN_CONTROL_PACE:
/* TODO */
pb = (bool*)va_arg( args, bool * );
*pb = false;
return VLC_SUCCESS;
case DEMUX_GET_PTS_DELAY:
pi64 = (int64_t*)va_arg( args, int64_t * );
*pi64 = INT64_C(1000)
* var_InheritInteger( p_demux, "live-caching" );
return VLC_SUCCESS;
/* TODO implement others */
default:
return VLC_EGENERIC;
}
}
/*****************************************************************************
* Video, audio & VBI decoding
*****************************************************************************/
#define WSS_LINE 23
struct block_extension_t
{
bool b_progressive; /**< is it a progressive frame ? */
bool b_top_field_first; /**< which field is first */
unsigned int i_nb_fields; /**< # of displayed fields */
unsigned int i_aspect; /**< aspect ratio of frame */
};
static int NewFrame( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
p_sys->p_current_picture = block_Alloc( p_sys->i_block_size );
if( unlikely( !p_sys->p_current_picture ) )
return VLC_ENOMEM;
p_sys->p_y = p_sys->p_current_picture->p_buffer;
p_sys->p_u = p_sys->p_y + p_sys->i_width * p_sys->i_height;
p_sys->p_v = p_sys->p_u + p_sys->i_width * p_sys->i_height / 4;
for ( int i = 0; i < MAX_AUDIOS; i++ )
{
sdi_audio_t *p_audio = &p_sys->p_audios[i];
p_audio->i_left_samples = p_audio->i_right_samples = 0;
}
return VLC_SUCCESS;
}
static int StartDecode( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
es_format_t fmt;
char *psz_parser;
p_sys->i_next_date = START_DATE;
p_sys->i_incr = 1000000 * p_sys->i_frame_rate_base / p_sys->i_frame_rate;
p_sys->i_block_size = p_sys->i_width * p_sys->i_height * 3 / 2
+ sizeof(struct block_extension_t);
if( NewFrame( p_demux ) != VLC_SUCCESS )
return VLC_ENOMEM;
/* Video ES */
es_format_Init( &fmt, VIDEO_ES, VLC_CODEC_I420 );
fmt.i_id = p_sys->i_id_video;
fmt.video.i_frame_rate = p_sys->i_frame_rate;
fmt.video.i_frame_rate_base = p_sys->i_frame_rate_base;
fmt.video.i_width = p_sys->i_width;
fmt.video.i_height = p_sys->i_height;
int i_aspect = p_sys->i_forced_aspect ? p_sys->i_forced_aspect
: p_sys->i_aspect;
fmt.video.i_sar_num = i_aspect * fmt.video.i_height
/ fmt.video.i_width;
fmt.video.i_sar_den = VOUT_ASPECT_FACTOR;
p_sys->p_es_video = es_out_Add( p_demux->out, &fmt );
if ( p_sys->b_vbi && InitWSS( p_demux ) != VLC_SUCCESS )
p_sys->b_vbi = 0;
/* Teletext ES */
psz_parser = p_sys->psz_telx;
if ( psz_parser != NULL && *psz_parser )
{
if ( !p_sys->b_vbi )
{
msg_Warn( p_demux, "VBI is unsupported on this input stream" );
}
else
{
int i_id;
char *psz_next = strchr( psz_parser, '=' );
if ( psz_next != NULL )
{
*psz_next = '\0';
i_id = strtol( psz_parser, NULL, 0 );
psz_parser = psz_next + 1;
}
else
i_id = 0;
psz_next = strchr( psz_parser, '-' );
if ( psz_next != NULL )
*psz_next++ = '\0';
p_sys->i_telx_line = strtol( psz_parser, NULL, 0 ) - 1;
if ( psz_next != NULL )
p_sys->i_telx_count = strtol( psz_next, NULL, 0 )
- p_sys->i_telx_line - 1 + 1;
else
p_sys->i_telx_count = 1;
if ( InitTelx( p_demux ) == VLC_SUCCESS )
{
int i_dr_size = 0;
uint8_t *p_dr = NULL;
msg_Dbg( p_demux, "capturing VBI lines %d-%d and %d-%d",
p_sys->i_telx_line + 1,
p_sys->i_telx_line + 1 + p_sys->i_telx_count - 1,
p_sys->i_telx_line + 1 + 313,
p_sys->i_telx_line + 1 + 313
+ p_sys->i_telx_count - 1 );
es_format_Init( &fmt, SPU_ES, VLC_CODEC_TELETEXT );
fmt.i_id = i_id;
/* Teletext language & type */
psz_parser = p_sys->psz_telx_lang;
while ( (psz_next = strchr( psz_parser, '=' )) != NULL )
{
int i_page;
*psz_next++ = '\0';
if ( !psz_next[0] || !psz_next[1] || !psz_next[2] )
break;
i_page = strtol( psz_parser, NULL, 0 );
i_dr_size += 5;
p_dr = realloc( p_dr, i_dr_size );
p_dr[i_dr_size - 5] = *psz_next++;
p_dr[i_dr_size - 4] = *psz_next++;
p_dr[i_dr_size - 3] = *psz_next++;
if ( *psz_next == '/' )
{
psz_next++;
p_dr[i_dr_size - 2] = strtol( psz_next, &psz_next, 0 )
<< 3;
}
else /* subtitle for hearing impaired */
p_dr[i_dr_size - 2] = 0x5 << 3;
p_dr[i_dr_size - 2] |= (i_page / 100) & 0x7;
p_dr[i_dr_size - 1] = i_page % 100;
if ( *psz_next == ',' )
psz_next++;
psz_parser = psz_next;
}
fmt.i_extra = i_dr_size;
fmt.p_extra = p_dr;
p_sys->p_es_telx = es_out_Add( p_demux->out, &fmt );
}
else
p_sys->i_telx_count = 0;
}
}
return VLC_SUCCESS;
}
static void StopDecode( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
if ( p_sys->i_state != STATE_SYNC )
return;
free( p_sys->p_line_buffer );
block_Release( p_sys->p_current_picture );
p_sys->p_current_picture = NULL;
es_out_Del( p_demux->out, p_sys->p_es_video );
if ( p_sys->b_vbi )
{
free( p_sys->p_wss_buffer );
p_sys->p_wss_buffer = NULL;
vbi_raw_decoder_destroy( &p_sys->rd_wss );
if ( p_sys->p_es_telx )
{
es_out_Del( p_demux->out, p_sys->p_es_telx );
free( p_sys->p_telx_buffer );
p_sys->p_telx_buffer = NULL;
vbi_raw_decoder_destroy( &p_sys->rd_telx );
}
}
for ( int i = 0; i < MAX_AUDIOS; i++ )
{
sdi_audio_t *p_audio = &p_sys->p_audios[i];
if ( p_audio->i_group && p_audio->p_es != NULL )
{
es_out_Del( p_demux->out, p_audio->p_es );
p_audio->p_es = NULL;
free( p_audio->p_buffer );
p_audio->p_buffer = NULL;
}
}
}
static void InitVideo( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
int i_total_width = (p_sys->i_anc_size + p_sys->i_active_size) * 4 / 5;
p_sys->i_width = (p_sys->i_active_size - 5) * 4 / 10;
if ( p_sys->i_nb_lines == 625 )
{
/* PAL */
p_sys->i_frame_rate = 25;
p_sys->i_frame_rate_base = 1;
p_sys->i_height = 576;
p_sys->i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
p_sys->b_hd = false;
}
else if ( p_sys->i_nb_lines == 525 )
{
/* NTSC */
p_sys->i_frame_rate = 30000;
p_sys->i_frame_rate_base = 1001;
p_sys->i_height = 480;
p_sys->i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
p_sys->b_hd = false;
}
else if ( p_sys->i_nb_lines == 1125 && i_total_width == 2640 )
{
/* 1080i50 or 1080p25 */
p_sys->i_frame_rate = 25;
p_sys->i_frame_rate_base = 1;
p_sys->i_height = 1080;
p_sys->i_aspect = 16 * VOUT_ASPECT_FACTOR / 9;
p_sys->b_hd = true;
}
else if ( p_sys->i_nb_lines == 1125 && i_total_width == 2200 )
{
/* 1080i60 or 1080p30 */
p_sys->i_frame_rate = 30000;
p_sys->i_frame_rate_base = 1001;
p_sys->i_height = 1080;
p_sys->i_aspect = 16 * VOUT_ASPECT_FACTOR / 9;
p_sys->b_hd = true;
}
else if ( p_sys->i_nb_lines == 750 && i_total_width == 1980 )
{
/* 720p50 */
p_sys->i_frame_rate = 50;
p_sys->i_frame_rate_base = 1;
p_sys->i_height = 720;
p_sys->i_aspect = 16 * VOUT_ASPECT_FACTOR / 9;
p_sys->b_hd = true;
}
else if ( p_sys->i_nb_lines == 750 && i_total_width == 1650 )
{
/* 720p60 */
p_sys->i_frame_rate = 60000;
p_sys->i_frame_rate_base = 1001;
p_sys->i_height = 720;
p_sys->i_aspect = 16 * VOUT_ASPECT_FACTOR / 9;
p_sys->b_hd = true;
}
else
{
msg_Warn( p_demux, "unable to determine video type" );
/* Put sensitive defaults */
p_sys->i_frame_rate = 25;
p_sys->i_frame_rate_base = 1;
p_sys->i_height = p_sys->i_nb_lines;
p_sys->i_aspect = 16 * VOUT_ASPECT_FACTOR / 9;
p_sys->b_hd = true;
}
p_sys->b_vbi = !p_sys->b_hd;
}
static void DecodeVideo( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
struct block_extension_t ext;
/* FIXME: progressive formats ? */
ext.b_progressive = false;
ext.i_nb_fields = 2;
ext.b_top_field_first = true;
ext.i_aspect = p_sys->i_forced_aspect ? p_sys->i_forced_aspect :
p_sys->i_aspect;
memcpy( &p_sys->p_current_picture->p_buffer[p_sys->i_block_size
- sizeof(struct block_extension_t)],
&ext, sizeof(struct block_extension_t) );
p_sys->p_current_picture->i_dts = p_sys->p_current_picture->i_pts
= p_sys->i_next_date;
es_out_Send( p_demux->out, p_sys->p_es_video, p_sys->p_current_picture );
}
static int InitWSS( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
vbi_raw_decoder_init( &p_sys->rd_wss );
p_sys->rd_wss.scanning = 625;
p_sys->rd_wss.sampling_format = VBI_PIXFMT_UYVY;
p_sys->rd_wss.sampling_rate = 13.5e6;
p_sys->rd_wss.bytes_per_line = 720 * 2;
p_sys->rd_wss.offset = 9.5e-6 * 13.5e6;
p_sys->rd_wss.start[0] = 23;
p_sys->rd_wss.count[0] = 1;
p_sys->rd_wss.start[1] = 0;
p_sys->rd_wss.count[1] = 0;
p_sys->rd_wss.interlaced = FALSE;
p_sys->rd_wss.synchronous = TRUE;
if ( vbi_raw_decoder_add_services( &p_sys->rd_wss,
VBI_SLICED_WSS_625,
/* strict */ 2 ) == 0 )
{
msg_Warn( p_demux, "cannot initialize zvbi for WSS" );
vbi_raw_decoder_destroy ( &p_sys->rd_telx );
return VLC_EGENERIC;
}
p_sys->p_wss_buffer = malloc( p_sys->i_width * 2 );
if( !p_sys->p_wss_buffer )
{
vbi_raw_decoder_destroy ( &p_sys->rd_telx );
return VLC_ENOMEM;
}
return VLC_SUCCESS;
}
static void DecodeWSS( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
vbi_sliced p_sliced[1];
if ( vbi_raw_decode( &p_sys->rd_wss, p_sys->p_wss_buffer, p_sliced ) == 0 )
{
p_sys->i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
}
else
{
unsigned int i_old_aspect = p_sys->i_aspect;
uint8_t *p = p_sliced[0].data;
int i_aspect, i_parity;
i_aspect = p[0] & 15;
i_parity = i_aspect;
i_parity ^= i_parity >> 2;
i_parity ^= i_parity >> 1;
i_aspect &= 7;
if ( !(i_parity & 1) )
msg_Warn( p_demux, "WSS parity error" );
else if ( i_aspect == 7 )
p_sys->i_aspect = 16 * VOUT_ASPECT_FACTOR / 9;
else
p_sys->i_aspect = 4 * VOUT_ASPECT_FACTOR / 3;
if ( p_sys->i_aspect != i_old_aspect )
msg_Dbg( p_demux, "new WSS information (ra=%x md=%x cod=%x hlp=%x rvd=%x sub=%x pos=%x srd=%x c=%x cp=%x)",
i_aspect, (p[0] & 0x10) >> 4, (p[0] & 0x20) >> 5,
(p[0] & 0x40) >> 6, (p[0] & 0x80) >> 7, p[1] & 0x01,
(p[1] >> 1) & 3, (p[1] & 0x08) >> 3, (p[1] & 0x10) >> 4,
(p[1] & 0x20) >> 5 );
}
}
static int InitTelx( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
vbi_raw_decoder_init( &p_sys->rd_telx );
p_sys->rd_telx.scanning = 625;
p_sys->rd_telx.sampling_format = VBI_PIXFMT_UYVY;
p_sys->rd_telx.sampling_rate = 13.5e6;
p_sys->rd_telx.bytes_per_line = 720 * 2;
p_sys->rd_telx.offset = 9.5e-6 * 13.5e6;
p_sys->rd_telx.start[0] = p_sys->i_telx_line + 1;
p_sys->rd_telx.count[0] = p_sys->i_telx_count;
p_sys->rd_telx.start[1] = p_sys->i_telx_line + 1 + 313;
p_sys->rd_telx.count[1] = p_sys->i_telx_count;
p_sys->rd_telx.interlaced = FALSE;
p_sys->rd_telx.synchronous = TRUE;
if ( vbi_raw_decoder_add_services( &p_sys->rd_telx, VBI_SLICED_TELETEXT_B,
0 ) == 0 )
{
msg_Warn( p_demux, "cannot initialize zvbi for Teletext" );
vbi_raw_decoder_destroy ( &p_sys->rd_telx );
return VLC_EGENERIC;
}
p_sys->p_telx_buffer = malloc( p_sys->i_telx_count * p_sys->i_width * 4 );
if( !p_sys->p_telx_buffer )
{
vbi_raw_decoder_destroy ( &p_sys->rd_telx );
return VLC_ENOMEM;
}
return VLC_SUCCESS;
}
static int DecodeTelx( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
vbi_sliced p_sliced[p_sys->i_telx_count * 2];
int i_nb_slices = vbi_raw_decode( &p_sys->rd_telx, p_sys->p_telx_buffer,
p_sliced );
if ( i_nb_slices )
{
/* 3, 7, 11, 15, etc. */
int i_nb_slices_rounded = 3 + (i_nb_slices / 4) * 4;
int i;
uint8_t *p;
block_t *p_block = block_Alloc( 1 + i_nb_slices_rounded * 46 );
if( unlikely( !p_block ) )
return VLC_ENOMEM;
p_block->p_buffer[0] = 0x10; /* FIXME ? data_identifier */
p = p_block->p_buffer + 1;
for ( i = 0; i < i_nb_slices; i++ )
{
int i_line = p_sliced[i].line;
p[0] = 0x3; /* FIXME data_unit_id == subtitles */
p[1] = 0x2c; /* data_unit_length */
/* reserved | field_parity (kind of inverted) | line */
p[2] = 0xc0 | (i_line > 313 ? 0 : 0x20) | (i_line % 313);
p[3] = 0xe4; /* framing code */
for ( int j = 0; j < 42; j++ )
p[4 + j] = vbi_rev8( p_sliced[i].data[j] );
p += 46;
}
/* Let's stuff */
for ( ; i < i_nb_slices_rounded; i++ )
{
p[0] = 0xff;
p[1] = 0x2c;
memset( p + 2, 0xff, 44 );
p += 46;
}
p_block->i_dts = p_block->i_pts = p_sys->i_next_date;
es_out_Send( p_demux->out, p_sys->p_es_telx, p_block );
}
return VLC_SUCCESS;
}
static int InitAudio( demux_t *p_demux, sdi_audio_t *p_audio )
{
demux_sys_t *p_sys = p_demux->p_sys;
es_format_t fmt;
msg_Dbg( p_demux, "starting audio %u/%u rate:%u delay:%d", p_audio->i_group,
p_audio->i_pair, p_audio->i_rate, p_audio->i_delay );
es_format_Init( &fmt, AUDIO_ES, VLC_CODEC_S16L );
fmt.i_id = p_audio->i_id;
fmt.audio.i_channels = 2;
fmt.audio.i_original_channels =
fmt.audio.i_physical_channels = AOUT_CHANS_STEREO;
fmt.audio.i_rate = p_audio->i_rate;
fmt.audio.i_bitspersample = 16;
fmt.audio.i_blockalign = fmt.audio.i_channels *
fmt.audio.i_bitspersample / 8;
fmt.i_bitrate = fmt.audio.i_channels * fmt.audio.i_rate *
fmt.audio.i_bitspersample;
p_audio->p_es = es_out_Add( p_demux->out, &fmt );
p_audio->i_nb_samples = p_audio->i_rate * p_sys->i_frame_rate_base
/ p_sys->i_frame_rate;
p_audio->i_max_samples = (float)p_audio->i_nb_samples *
(1.f + SAMPLERATE_TOLERANCE);
p_audio->p_buffer = malloc( p_audio->i_max_samples * sizeof(int16_t) * 2 );
p_audio->i_left_samples = p_audio->i_right_samples = 0;
p_audio->i_block_number = 0;
if( unlikely( !p_audio->p_buffer ) )
return VLC_ENOMEM;
return VLC_SUCCESS;
}
/* Fast and efficient linear resampling routine */
static void ResampleAudio( int16_t *p_out, int16_t *p_in,
unsigned int i_out, unsigned int i_in )
{
unsigned int i_remainder = 0;
float f_last_sample = (float)*p_in / 32768.f;
*p_out = *p_in;
p_out += 2;
p_in += 2;
for ( unsigned int i = 1; i < i_in; i++ )
{
float f_in = (float)*p_in / 32768.f;
while ( i_remainder < i_out )
{
float f_out = f_last_sample;
f_out += (f_in - f_last_sample) * i_remainder / i_out;
if ( f_out >= 1.f ) *p_out = 32767;
else if ( f_out < -1.f ) *p_out = -32768;
else *p_out = f_out * 32768.f;
p_out += 2;
i_remainder += i_in;
}
f_last_sample = f_in;
p_in += 2;
i_remainder -= i_out;
}
}
static int DecodeAudio( demux_t *p_demux, sdi_audio_t *p_audio )
{
demux_sys_t *p_sys = p_demux->p_sys;
block_t *p_block;
int16_t *p_output;
if ( p_audio->p_buffer == NULL )
return VLC_EGENERIC;
if ( !p_audio->i_left_samples && !p_audio->i_right_samples )
{
msg_Warn( p_demux, "no audio %u/%u", p_audio->i_group,
p_audio->i_pair );
return VLC_EGENERIC;
}
if ( p_audio->i_left_samples <
(float)p_audio->i_nb_samples * (1.f - SAMPLERATE_TOLERANCE) ||
p_audio->i_left_samples >
(float)p_audio->i_nb_samples * (1.f + SAMPLERATE_TOLERANCE) )
{
msg_Warn( p_demux,
"left samplerate out of tolerance for audio %u/%u (%u vs. %u)",
p_audio->i_group, p_audio->i_pair,
p_audio->i_left_samples, p_audio->i_nb_samples );
return VLC_EGENERIC;
}
if ( p_audio->i_right_samples <
(float)p_audio->i_nb_samples * (1.f - SAMPLERATE_TOLERANCE) ||
p_audio->i_right_samples >
(float)p_audio->i_nb_samples * (1.f + SAMPLERATE_TOLERANCE) )
{
msg_Warn( p_demux,
"right samplerate out of tolerance for audio %u/%u (%u vs. %u)",
p_audio->i_group, p_audio->i_pair,
p_audio->i_right_samples, p_audio->i_nb_samples );
return VLC_EGENERIC;
}
p_block = block_Alloc( p_audio->i_nb_samples * sizeof(int16_t) * 2 );
if( unlikely( !p_block ) )
return VLC_ENOMEM;
p_block->i_dts = p_block->i_pts = p_sys->i_next_date
+ (mtime_t)p_audio->i_delay * INT64_C(1000000) / p_audio->i_rate;
p_output = (int16_t *)p_block->p_buffer;
if ( p_audio->i_left_samples == p_audio->i_nb_samples &&
p_audio->i_right_samples == p_audio->i_nb_samples )
memcpy( p_output, p_audio->p_buffer,
p_audio->i_nb_samples * sizeof(int16_t) * 2 );
else
{
ResampleAudio( p_output, p_audio->p_buffer,
p_audio->i_nb_samples, p_audio->i_left_samples );
ResampleAudio( p_output + 1, p_audio->p_buffer + 1,
p_audio->i_nb_samples, p_audio->i_right_samples );
}
es_out_Send( p_demux->out, p_audio->p_es, p_block );
return VLC_SUCCESS;
}
static int DecodeFrame( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
if ( p_sys->b_vbi )
{
DecodeWSS( p_demux );
if ( p_sys->i_height == 576 )
{
/* For PAL, erase first half of line 23, last half of line 623,
* and line 624 ; no need to erase chrominance */
memset( p_sys->p_y, 0, p_sys->i_width / 2 );
memset( p_sys->p_y + p_sys->i_width * 574 + p_sys->i_width / 2,
0, p_sys->i_width * 3 / 2 );
}
}
if ( p_sys->i_telx_count )
if ( DecodeTelx( p_demux ) != VLC_SUCCESS )
return VLC_ENOMEM;
for ( int i = 0; i < MAX_AUDIOS; i++ )
{
if ( p_sys->p_audios[i].i_group && p_sys->p_audios[i].p_es != NULL )
if( DecodeAudio( p_demux, &p_sys->p_audios[i] ) != VLC_SUCCESS )
return VLC_EGENERIC;
}
DecodeVideo( p_demux );
es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_sys->i_next_date );
p_sys->i_next_date += p_sys->i_incr;
if( NewFrame( p_demux ) != VLC_SUCCESS )
return VLC_ENOMEM;
return VLC_SUCCESS;
}
/*****************************************************************************
* SDI syntax parsing stuff
*****************************************************************************/
#define FIELD_1_VBLANK_EAV 0xB6
#define FIELD_1_VBLANK_SAV 0xAB
#define FIELD_1_ACTIVE_EAV 0x9D
#define FIELD_1_ACTIVE_SAV 0x80
#define FIELD_2_VBLANK_EAV 0xF1
#define FIELD_2_VBLANK_SAV 0xEC
#define FIELD_2_ACTIVE_EAV 0xDA
#define FIELD_2_ACTIVE_SAV 0xC7
static const uint8_t *FindReferenceCode( uint8_t i_code,
const uint8_t *p_parser,
const uint8_t *p_end )
{
while ( p_parser <= p_end - 5 )
{
if ( p_parser[0] == 0xff && p_parser[1] == 0x3 && p_parser[2] == 0x0
&& p_parser[3] == 0x0 && p_parser[4] == i_code )
return p_parser;
p_parser += 5;
}
return NULL;
}
static const uint8_t *CountReference( unsigned int *pi_count, uint8_t i_code,
const uint8_t *p_parser,
const uint8_t *p_end )
{
const uint8_t *p_tmp = FindReferenceCode( i_code, p_parser, p_end );
if ( p_tmp == NULL )
{
*pi_count += p_end - p_parser;
return NULL;
}
*pi_count += p_tmp - p_parser;
return p_tmp;
}
static const uint8_t *GetLine( demux_t *p_demux, const uint8_t **pp_parser,
const uint8_t *p_end )
{
demux_sys_t *p_sys = p_demux->p_sys;
unsigned int i_total_size = p_sys->i_anc_size + p_sys->i_active_size;
const uint8_t *p_tmp;
if ( p_sys->i_line_buffer )
{
unsigned int i_remaining = i_total_size - p_sys->i_line_buffer;
memcpy( p_sys->p_line_buffer + p_sys->i_line_buffer,
*pp_parser, i_remaining );
*pp_parser += i_remaining;
p_sys->i_line_buffer = 0;
return p_sys->p_line_buffer;
}
if ( p_end - *pp_parser < (int)i_total_size )
{
memcpy( p_sys->p_line_buffer, *pp_parser,
p_end - *pp_parser );
p_sys->i_line_buffer = p_end - *pp_parser;
return NULL;
}
p_tmp = *pp_parser;
*pp_parser += i_total_size;
return p_tmp;
}
#define U (uint16_t)((p_line[0]) | ((p_line[1] & 0x3) << 8))
#define Y1 (uint16_t)((p_line[1] >> 2) | ((p_line[2] & 0xf) << 6))
#define V (uint16_t)((p_line[2] >> 4) | ((p_line[3] & 0x3f) << 4))
#define Y2 (uint16_t)((p_line[3] >> 6) | (p_line[4] << 2))
static void UnpackVBI( const uint8_t *p_line, unsigned int i_size,
uint8_t *p_dest )
{
const uint8_t *p_end = p_line + i_size;
while ( p_line < p_end )
{
*p_dest++ = (U + 2) / 4;
*p_dest++ = (Y1 + 2) / 4;
*p_dest++ = (V + 2) / 4;
*p_dest++ = (Y2 + 2) / 4;
p_line += 5;
}
}
/* For lines 0 [4] or 1 [4] */
static void Unpack01( const uint8_t *p_line, unsigned int i_size,
uint8_t *p_y, uint8_t *p_u, uint8_t *p_v )
{
const uint8_t *p_end = p_line + i_size;
while ( p_line < p_end )
{
*p_u++ = (U + 2) / 4;
*p_y++ = (Y1 + 2) / 4;
*p_v++ = (V + 2) / 4;
*p_y++ = (Y2 + 2) / 4;
p_line += 5;
}
}
/* For lines 2 [4] */
static void Unpack2( const uint8_t *p_line, unsigned int i_size,
uint8_t *p_y, uint8_t *p_u, uint8_t *p_v )
{
const uint8_t *p_end = p_line + i_size;
while ( p_line < p_end )
{
uint16_t tmp;
tmp = 3 * *p_u;
tmp += (U + 2) / 4;
*p_u++ = tmp / 4;
*p_y++ = (Y1 + 2) / 4;
tmp = 3 * *p_v;
tmp += (V + 2) / 4;
*p_v++ = tmp / 4;
*p_y++ = (Y2 + 2) / 4;
p_line += 5;
}
}
/* For lines 3 [4] */
static void Unpack3( const uint8_t *p_line, unsigned int i_size,
uint8_t *p_y, uint8_t *p_u, uint8_t *p_v )
{
const uint8_t *p_end = p_line + i_size;
while ( p_line < p_end )
{
uint16_t tmp;
tmp = *p_u;
tmp += 3 * (U + 2) / 4;
*p_u++ = tmp / 4;
*p_y++ = (Y1 + 2) / 4;
tmp = *p_v;
tmp += 3 * (V + 2) / 4;
*p_v++ = tmp / 4;
*p_y++ = (Y2 + 2) / 4;
p_line += 5;
}
}
#undef U
#undef Y1
#undef V
#undef Y2
#define A0 (uint16_t)((p_anc[0]) | ((p_anc[1] & 0x3) << 8))
#define A1 (uint16_t)((p_anc[1] >> 2) | ((p_anc[2] & 0xf) << 6))
#define A2 (uint16_t)((p_anc[2] >> 4) | ((p_anc[3] & 0x3f) << 4))
#define A3 (uint16_t)((p_anc[3] >> 6) | (p_anc[4] << 2))
static void UnpackAnc( const uint8_t *p_anc, unsigned int i_size,
uint16_t *p_dest )
{
const uint8_t *p_end = p_anc + i_size;
while ( p_anc <= p_end - 5 )
{
*p_dest++ = A0;
*p_dest++ = A1;
*p_dest++ = A2;
*p_dest++ = A3;
p_anc += 5;
}
}
#undef A0
#undef A1
#undef A2
#undef A3
static int HasAncillary( const uint8_t *p_anc )
{
return ( (p_anc[0] == 0x0 && p_anc[1] == 0xfc && p_anc[2] == 0xff
&& (p_anc[3] & 0x3f) == 0x3f) );
}
static void HandleAudioData( demux_t *p_demux, const uint16_t *p_anc,
uint8_t i_data_count, uint8_t i_group,
uint8_t i_block_number )
{
demux_sys_t *p_sys = p_demux->p_sys;
if ( i_data_count % 3 )
{
msg_Warn( p_demux, "malformed audio data for group %u", i_group );
return;
}
for ( int i = 0; i < MAX_AUDIOS; i++ )
{
sdi_audio_t *p_audio = &p_sys->p_audios[i];
if ( p_audio->i_group == i_group )
{
const uint16_t *x = p_anc;
/* SMPTE 272M says that when parsing a frame, if an audio config
* structure is present we will encounter it first. Otherwise
* it is assumed to be 48 kHz. */
if ( p_audio->p_es == NULL )
{
p_audio->i_rate = 48000;
p_audio->i_delay = 0;
if( InitAudio( p_demux, p_audio ) != VLC_SUCCESS )
return;
}
if ( i_block_number )
{
if ( p_audio->i_block_number + 1 != i_block_number )
msg_Warn( p_demux,
"audio data block discontinuity (%"PRIu8"->%"PRIu8") for group %"PRIu8,
p_audio->i_block_number, i_block_number,
i_group );
if ( i_block_number == 0xff )
p_audio->i_block_number = 0;
else
p_audio->i_block_number = i_block_number;
}
while ( x < p_anc + i_data_count )
{
if ( ((*x & 0x4) && p_audio->i_pair == 2)
|| (!(*x & 0x4) && p_audio->i_pair == 1) )
{
uint32_t i_tmp = (uint32_t)((x[0] & 0x1f1) >> 3)
| ((x[1] & 0x1ff) << 6)
| ((x[2] & 0x1f) << 15);
int32_t i_sample;
if ( x[2] & 0x10 )
i_sample = i_tmp | 0xfff00000;
else
i_sample = i_tmp;
if ( x[0] & 0x2 )
{
if ( p_audio->i_right_samples < p_audio->i_max_samples )
p_audio->p_buffer[2 * p_audio->i_right_samples
+ 1] = (i_sample + 8) / 16;
p_audio->i_right_samples++;
}
else
{
if ( p_audio->i_left_samples < p_audio->i_max_samples )
p_audio->p_buffer[2 * p_audio->i_left_samples]
= (i_sample + 8) / 16;
p_audio->i_left_samples++;
}
}
x += 3;
}
}
}
}
static void HandleAudioConfig( demux_t *p_demux, const uint16_t *p_anc,
uint8_t i_data_count, uint8_t i_group )
{
demux_sys_t *p_sys = p_demux->p_sys;
if ( i_data_count != 18 )
{
msg_Warn( p_demux, "malformed audio config for group %u", i_group );
return;
}
for ( int i = 0; i < MAX_AUDIOS; i++ )
{
sdi_audio_t *p_audio = &p_sys->p_audios[i];
if ( p_audio->i_group == i_group && p_audio->p_es == NULL )
{
unsigned int i_rate;
if ( p_audio->i_pair == 2 )
{
i_rate = (p_anc[2] & 0xe0) >> 5;
if ( p_anc[7] & 0x1 )
{
uint32_t i_tmp = ((p_anc[7] & 0x1fe) >> 1)
| ((p_anc[8] & 0x1ff) << 8)
| ((p_anc[9] & 0x1ff) << 17);
if ( p_anc[9] & 0x80 )
p_audio->i_delay = i_tmp | 0xfc000000;
else
p_audio->i_delay = i_tmp;
}
if ( p_anc[13] & 0x1 )
msg_Warn( p_demux, "asymetric audio is not supported" );
}
else
{
i_rate = (p_anc[2] & 0xe) >> 1;
if ( p_anc[4] & 0x1 )
{
uint32_t i_tmp = ((p_anc[4] & 0x1fe) >> 1)
| ((p_anc[5] & 0x1ff) << 8)
| ((p_anc[6] & 0x1ff) << 17);
if ( p_anc[6] & 0x80 )
p_audio->i_delay = i_tmp | 0xfc000000;
else
p_audio->i_delay = i_tmp;
}
if ( p_anc[10] & 0x1 )
msg_Warn( p_demux, "asymetric audio is not supported" );
}
switch ( i_rate )
{
case 0: p_audio->i_rate = 48000; break;
case 1: p_audio->i_rate = 44100; break;
case 2: p_audio->i_rate = 32000; break;
default:
msg_Warn( p_demux, "unknown rate for audio %u/%u (%u)",
i_group, p_sys->p_audios[i].i_pair, i_rate );
continue;
}
if( InitAudio( p_demux, p_audio ) != VLC_SUCCESS )
return;
}
}
}
/*
* Ancillary packet structure:
* byte 0: Ancillary Data Flag (0)
* byte 1: Ancillary Data Flag (0x3ff)
* byte 2: Ancillary Data Flag (0x3ff)
* byte 3: Data ID (2 high order bits = parity)
* byte 4: Data Block Number 1-255 or 0=unknown (if DID < 0x80)
* or Secondary Data ID (if DID >= 0x80)
* byte 5: Data Count (10 bits)
* byte 6+DC: Checksum
*/
static void HandleAncillary( demux_t *p_demux, const uint16_t *p_anc,
unsigned int i_size )
{
uint8_t i_data_count;
if ( i_size < 7
|| p_anc[0] != 0x0 || p_anc[1] != 0x3ff || p_anc[2] != 0x3ff )
return;
i_data_count = p_anc[5] & 0xff;
if ( i_size - 6 < i_data_count )
{
msg_Warn( p_demux, "malformed ancillary packet (size %u > %u)",
i_data_count, i_size - 6 );
return;
}
switch ( p_anc[3] ) /* Data ID */
{
case 0x2ff:
HandleAudioData( p_demux, p_anc + 6, i_data_count, 1, p_anc[4] & 0xff );
break;
case 0x1fd:
HandleAudioData( p_demux, p_anc + 6, i_data_count, 2, p_anc[4] & 0xff );
break;
case 0x1fb:
HandleAudioData( p_demux, p_anc + 6, i_data_count, 3, p_anc[4] & 0xff );
break;
case 0x2f9:
HandleAudioData( p_demux, p_anc + 6, i_data_count, 4, p_anc[4] & 0xff );
break;
case 0x1ef:
HandleAudioConfig( p_demux, p_anc + 6, i_data_count, 1 );
break;
case 0x2ee:
HandleAudioConfig( p_demux, p_anc + 6, i_data_count, 2 );
break;
case 0x2ed:
HandleAudioConfig( p_demux, p_anc + 6, i_data_count, 3 );
break;
case 0x1ec:
HandleAudioConfig( p_demux, p_anc + 6, i_data_count, 4 );
break;
/* Extended data packets, same order */
case 0x1fe:
case 0x2fc:
case 0x2fa:
case 0x1f8:
default:
break;
case 0x88: /* non-conforming ANC packet */
p_anc += 7;
i_size -= 7;
while ( i_size >= 7 && (p_anc[0] != 0x0 || p_anc[1] != 0x3ff
|| p_anc[2] != 0x3ff) )
{
p_anc++;
i_size--;
}
if ( i_size >= 7 )
HandleAncillary( p_demux, p_anc, i_size );
return;
}
return HandleAncillary( p_demux, p_anc + i_data_count + 7,
i_size - i_data_count - 7 );
}
static int HandleSDBuffer( demux_t *p_demux, uint8_t *p_buffer,
unsigned int i_buffer_size )
{
demux_sys_t *p_sys = p_demux->p_sys;
const uint8_t *p_parser = p_buffer;
const uint8_t *p_end = p_parser + i_buffer_size;
const uint8_t *p_line;
if ( p_sys->i_state != STATE_SYNC
&& p_sys->i_last_state_change < mdate() - RESYNC_TIMEOUT )
{
p_sys->i_state = STATE_NOSYNC;
p_sys->i_last_state_change = mdate();
return VLC_EGENERIC;
}
switch ( p_sys->i_state )
{
case STATE_NOSYNC:
default:
p_parser = FindReferenceCode( FIELD_2_VBLANK_SAV, p_parser, p_end );
if ( p_parser == NULL )
break;
p_sys->i_state = STATE_STARTSYNC;
p_sys->i_last_state_change = mdate();
case STATE_STARTSYNC:
p_parser = FindReferenceCode( FIELD_1_VBLANK_EAV, p_parser, p_end );
if ( p_parser == NULL )
break;
p_sys->i_anc_size = 0;
p_sys->i_state = STATE_ANCSYNC;
p_sys->i_last_state_change = mdate();
case STATE_ANCSYNC:
p_parser = CountReference( &p_sys->i_anc_size,
FIELD_1_VBLANK_SAV, p_parser, p_end );
if ( p_parser == NULL )
break;
p_sys->i_active_size = 0;
p_sys->i_state = STATE_LINESYNC;
p_sys->i_last_state_change = mdate();
case STATE_LINESYNC:
p_parser = CountReference( &p_sys->i_active_size,
FIELD_1_VBLANK_EAV, p_parser, p_end );
if ( p_parser == NULL )
break;
p_sys->i_picture_size = p_sys->i_anc_size + p_sys->i_active_size;
p_sys->i_state = STATE_ACTIVESYNC;
p_sys->i_last_state_change = mdate();
case STATE_ACTIVESYNC:
p_parser = CountReference( &p_sys->i_picture_size,
FIELD_1_ACTIVE_EAV, p_parser, p_end );
if ( p_parser == NULL )
break;
p_sys->i_line_offset = p_sys->i_picture_size
/ (p_sys->i_anc_size + p_sys->i_active_size);
p_sys->i_state = STATE_VBLANKSYNC;
p_sys->i_last_state_change = mdate();
case STATE_VBLANKSYNC:
p_parser = CountReference( &p_sys->i_picture_size,
FIELD_2_ACTIVE_EAV, p_parser, p_end );
if ( p_parser == NULL )
break;
p_sys->i_state = STATE_PICSYNC;
p_sys->i_last_state_change = mdate();
case STATE_PICSYNC:
p_parser = CountReference( &p_sys->i_picture_size,
FIELD_1_VBLANK_EAV, p_parser, p_end );
if ( p_parser == NULL )
break;
if ( p_sys->i_picture_size
% (p_sys->i_anc_size + p_sys->i_active_size) )
{
msg_Warn( p_demux, "wrong picture size (anc=%d active=%d total=%d offset=%d), syncing",
p_sys->i_anc_size, p_sys->i_active_size,
p_sys->i_picture_size, p_sys->i_line_offset + 1 );
p_sys->i_state = STATE_NOSYNC;
p_sys->i_last_state_change = mdate();
break;
}
p_sys->i_nb_lines = p_sys->i_picture_size
/ (p_sys->i_anc_size + p_sys->i_active_size);
InitVideo( p_demux );
msg_Dbg( p_demux,
"acquired sync, anc=%d active=%d lines=%d offset=%d",
p_sys->i_anc_size, p_sys->i_active_size,
p_sys->i_nb_lines, p_sys->i_line_offset + 1 );
p_sys->i_state = STATE_SYNC;
if( StartDecode( p_demux ) != VLC_SUCCESS )
{
StopDecode( p_demux );
return VLC_ENOMEM;
}
p_sys->i_current_line = 0;
p_sys->p_line_buffer = malloc( p_sys->i_anc_size
+ p_sys->i_active_size );
if( !p_sys->p_line_buffer )
{
StopDecode( p_demux );
return VLC_ENOMEM;
}
p_sys->i_line_buffer = 0;
case STATE_SYNC:
while ( (p_line = GetLine( p_demux, &p_parser, p_end )) != NULL )
{
bool b_field = p_sys->b_hd ? false :
(p_sys->i_current_line >= p_sys->i_nb_lines / 2);
unsigned int i_field_height = p_sys->b_hd ? p_sys->i_height :
p_sys->i_height / 2;
unsigned int i_field_line = b_field ?
p_sys->i_current_line - (p_sys->i_nb_lines + 1) / 2 :
p_sys->i_current_line;
bool b_vbi = i_field_line < p_sys->i_line_offset ||
i_field_line >= p_sys->i_line_offset + i_field_height;
unsigned int anc = p_sys->i_anc_size;
if ( p_line[0] != 0xff || p_line[1] != 0x3
|| p_line[2] != 0x0 || p_line[3] != 0x0
|| p_line[anc+0] != 0xff || p_line[anc+1] != 0x3
|| p_line[anc+2] != 0x0 || p_line[anc+3] != 0x0
|| (!b_field && b_vbi &&
(p_line[4] != FIELD_1_VBLANK_EAV ||
p_line[anc+4] != FIELD_1_VBLANK_SAV))
|| (!b_field && !b_vbi &&
(p_line[4] != FIELD_1_ACTIVE_EAV ||
p_line[anc+4] != FIELD_1_ACTIVE_SAV))
|| (b_field && b_vbi &&
(p_line[4] != FIELD_2_VBLANK_EAV ||
p_line[anc+4] != FIELD_2_VBLANK_SAV))
|| (b_field && !b_vbi &&
(p_line[4] != FIELD_2_ACTIVE_EAV ||
p_line[anc+4] != FIELD_2_ACTIVE_SAV)) )
{
msg_Warn( p_demux, "lost sync line:%u SAV:%x EAV:%x",
p_sys->i_current_line + 1, p_line[4], p_line[anc+4] );
StopDecode( p_demux );
p_sys->i_state = STATE_NOSYNC;
p_sys->i_last_state_change = mdate();
break;
}
if ( HasAncillary( p_line + 5 ) )
{
/* HANC */
unsigned int i_anc_words = (p_sys->i_anc_size - 5) * 4 / 5;
uint16_t p_anc[i_anc_words];
UnpackAnc( p_line + 5, p_sys->i_anc_size - 5, p_anc );
HandleAncillary( p_demux, p_anc, i_anc_words );
}
if ( !b_vbi )
{
unsigned int i_active_field_line = i_field_line
- p_sys->i_line_offset;
unsigned int i_active_line = b_field
+ i_active_field_line * 2;
if ( !(i_active_field_line % 2) && !b_field )
Unpack01( p_line + anc + 5, p_sys->i_active_size - 5,
p_sys->p_y + p_sys->i_width * i_active_line,
p_sys->p_u + (p_sys->i_width / 2)
* (i_active_line / 2),
p_sys->p_v + (p_sys->i_width / 2)
* (i_active_line / 2) );
else if ( !(i_active_field_line % 2) )
Unpack01( p_line + anc + 5, p_sys->i_active_size - 5,
p_sys->p_y + p_sys->i_width * i_active_line,
p_sys->p_u + (p_sys->i_width / 2)
* (i_active_line / 2 + 1),
p_sys->p_v + (p_sys->i_width / 2)
* (i_active_line / 2 + 1) );
else if ( !b_field )
Unpack2( p_line + anc + 5, p_sys->i_active_size - 5,
p_sys->p_y + p_sys->i_width * i_active_line,
p_sys->p_u + (p_sys->i_width / 2)
* (i_active_line / 2 - 1),
p_sys->p_v + (p_sys->i_width / 2)
* (i_active_line / 2 - 1) );
else
Unpack3( p_line + anc + 5, p_sys->i_active_size - 5,
p_sys->p_y + p_sys->i_width * i_active_line,
p_sys->p_u + (p_sys->i_width / 2)
* (i_active_line / 2),
p_sys->p_v + (p_sys->i_width / 2)
* (i_active_line / 2) );
if ( p_sys->b_vbi && p_sys->i_height == 576
&& p_sys->i_current_line == p_sys->i_line_offset )
{
/* Line 23 is half VBI, half active */
UnpackVBI( p_line + anc + 5, p_sys->i_active_size - 5,
p_sys->p_wss_buffer );
}
}
else if ( p_sys->b_vbi && p_sys->i_telx_count &&
i_field_line >= p_sys->i_telx_line &&
i_field_line < p_sys->i_telx_line
+ p_sys->i_telx_count )
{
UnpackVBI( p_line + anc + 5, p_sys->i_active_size - 5,
&p_sys->p_telx_buffer[(i_field_line
- p_sys->i_telx_line + b_field * p_sys->i_telx_count)
* p_sys->i_width * 2] );
}
else if ( b_vbi && HasAncillary( p_line + anc + 5 ) )
{
/* VANC */
unsigned int i_anc_words = (p_sys->i_active_size - 5) * 4 / 5;
uint16_t p_anc[i_anc_words];
UnpackAnc( p_line + 5, p_sys->i_active_size - 5,
p_anc );
HandleAncillary( p_demux, p_anc, i_anc_words );
}
p_sys->i_current_line++;
if ( p_sys->i_current_line == p_sys->i_nb_lines )
{
p_sys->i_current_line %= p_sys->i_nb_lines;
if( DecodeFrame( p_demux ) != VLC_SUCCESS )
return VLC_EGENERIC;
}
}
break;
}
return VLC_SUCCESS;
}
/*****************************************************************************
* Low-level device stuff
*****************************************************************************/
#define MAXLEN 256
static int ReadULSysfs( const char *psz_fmt, unsigned int i_link )
{
char psz_file[MAXLEN];
unsigned int i_data;
snprintf( psz_file, sizeof(psz_file), psz_fmt, i_link );
FILE *stream = vlc_fopen( psz_file, "rt" );
if( stream == NULL )
return -1;
int ret = fscanf( stream, "%u", &i_data );
fclose( stream );
return (ret == 1 && i_data <= INT_MAX) ? (int)i_data : -1;
}
static int WriteULSysfs( const char *psz_fmt, unsigned int i_link,
unsigned int i_buf )
{
char psz_file[MAXLEN];
snprintf( psz_file, sizeof(psz_file), psz_fmt, i_link );
FILE *stream = vlc_fopen( psz_file, "wt" );
if( stream == NULL )
return -1;
int ret = fprintf( stream, "%u\n", i_buf );
fclose( stream );
return ret;
}
static int InitCapture( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
const int i_page_size = getpagesize();
unsigned int i_bufmemsize;
int i_ret;
char psz_dev[MAXLEN];
/* 10-bit mode or nothing */
if ( WriteULSysfs( SDI_MODE_FILE, p_sys->i_link, SDI_CTL_MODE_10BIT ) < 0 )
{
msg_Err( p_demux, "couldn't write file " SDI_MODE_FILE, p_sys->i_link );
return VLC_EGENERIC;
}
if ( (i_ret = ReadULSysfs( SDI_BUFFERS_FILE, p_sys->i_link )) < 0 )
{
msg_Err( p_demux, "couldn't read file " SDI_BUFFERS_FILE,
p_sys->i_link );
return VLC_EGENERIC;
}
p_sys->i_buffers = i_ret;
p_sys->i_current_buffer = 0;
if ( (i_ret = ReadULSysfs( SDI_BUFSIZE_FILE, p_sys->i_link )) < 0 )
{
msg_Err( p_demux, "couldn't read file " SDI_BUFSIZE_FILE,
p_sys->i_link );
return VLC_EGENERIC;
}
p_sys->i_buffer_size = i_ret;
if ( p_sys->i_buffer_size % 20 )
{
msg_Err( p_demux, "buffer size must be a multiple of 20" );
return VLC_EGENERIC;
}
snprintf( psz_dev, sizeof(psz_dev) - 1, SDI_DEVICE, p_sys->i_link );
if ( (p_sys->i_fd = vlc_open( psz_dev, O_RDONLY ) ) < 0 )
{
msg_Err( p_demux, "couldn't open device %s", psz_dev );
return VLC_EGENERIC;
}
i_bufmemsize = ((p_sys->i_buffer_size + i_page_size - 1) / i_page_size)
* i_page_size;
p_sys->pp_buffers = malloc( p_sys->i_buffers * sizeof(uint8_t *) );
if( !p_sys->pp_buffers )
return VLC_ENOMEM;
for ( unsigned int i = 0; i < p_sys->i_buffers; i++ )
{
if ( (p_sys->pp_buffers[i] = mmap( NULL, p_sys->i_buffer_size,
PROT_READ, MAP_SHARED, p_sys->i_fd,
i * i_bufmemsize )) == MAP_FAILED )
{
msg_Err( p_demux, "couldn't mmap(%d): %s", i,
vlc_strerror_c(errno) );
free( p_sys->pp_buffers );
return VLC_EGENERIC;
}
}
return VLC_SUCCESS;
}
static void CloseCapture( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
StopDecode( p_demux );
for ( unsigned int i = 0; i < p_sys->i_buffers; i++ )
munmap( p_sys->pp_buffers[i], p_sys->i_buffer_size );
close( p_sys->i_fd );
free( p_sys->pp_buffers );
}
static int Capture( demux_t *p_demux )
{
demux_sys_t *p_sys = p_demux->p_sys;
struct pollfd pfd;
pfd.fd = p_sys->i_fd;
pfd.events = POLLIN | POLLPRI;
if ( poll( &pfd, 1, READ_TIMEOUT ) < 0 )
{
msg_Warn( p_demux, "couldn't poll(): %s", vlc_strerror_c(errno) );
return VLC_EGENERIC;
}
if ( pfd.revents & POLLPRI )
{
unsigned int i_val;
if ( ioctl( p_sys->i_fd, SDI_IOC_RXGETEVENTS, &i_val ) < 0 )
msg_Warn( p_demux, "couldn't SDI_IOC_RXGETEVENTS: %s",
vlc_strerror_c(errno) );
else
{
if ( i_val & SDI_EVENT_RX_BUFFER )
msg_Warn( p_demux, "driver receive buffer queue overrun" );
if ( i_val & SDI_EVENT_RX_FIFO )
msg_Warn( p_demux, "onboard receive FIFO overrun");
if ( i_val & SDI_EVENT_RX_CARRIER )
msg_Warn( p_demux, "carrier status change");
}
p_sys->i_next_date += CLOCK_GAP;
}
if ( pfd.revents & POLLIN )
{
int i_ret;
if ( ioctl( p_sys->i_fd, SDI_IOC_DQBUF, p_sys->i_current_buffer ) < 0 )
{
msg_Warn( p_demux, "couldn't SDI_IOC_DQBUF: %s",
vlc_strerror_c(errno) );
return VLC_EGENERIC;
}
i_ret = HandleSDBuffer( p_demux,
p_sys->pp_buffers[p_sys->i_current_buffer],
p_sys->i_buffer_size );
if ( ioctl( p_sys->i_fd, SDI_IOC_QBUF, p_sys->i_current_buffer ) < 0 )
{
msg_Warn( p_demux, "couldn't SDI_IOC_QBUF: %s",
vlc_strerror_c(errno) );
return VLC_EGENERIC;
}
if ( i_ret == VLC_SUCCESS )
{
p_sys->i_current_buffer++;
p_sys->i_current_buffer %= p_sys->i_buffers;
}
else
{
/* Reference codes do not start on a multiple of 5. This sometimes
* happen. We really don't want to allow this. */
msg_Warn( p_demux, "resetting board" );
CloseCapture( p_demux );
InitCapture( p_demux );
}
}
return VLC_SUCCESS;
}