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vlc-1.1
Commit 0d65aff0 authored by Laurent Aimar's avatar Laurent Aimar
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Clean up zvbi decoder and fixed a few races conditions.

parent 2acbb5c0
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Showing with 95 additions and 91 deletions
modules/codec/zvbi.c
View file @ 0d65aff0
......@@ -123,25 +123,26 @@ struct decoder_sys_t
{
vbi_decoder * p_vbi_dec;
vbi_dvb_demux * p_dvb_demux;
unsigned int i_wanted_page;
unsigned int i_last_page;
bool b_update;
bool b_opaque;
/* Subtitles as text */
bool b_text;
bool b_text; /* Subtitles as text */
vlc_mutex_t lock; /* Lock to protect the following variables */
/* Positioning of Teletext images */
int i_align;
/* */
unsigned int i_wanted_page;
/* */
bool b_opaque;
};
static subpicture_t *Decode( decoder_t *, block_t ** );
static void event_handler( vbi_event *ev, void *user_data );
static void EventHandler( vbi_event *ev, void *user_data );
static int RequestPage( vlc_object_t *p_this, char const *psz_cmd,
vlc_value_t oldval, vlc_value_t newval, void *p_data );
static int OpaquePage( decoder_t *p_dec, vbi_page p_page, video_format_t fmt,
picture_t **p_src );
picture_t *p_src, bool b_opaque );
static int Opaque( vlc_object_t *p_this, char const *psz_cmd,
vlc_value_t oldval, vlc_value_t newval, void *p_data );
......@@ -171,6 +172,7 @@ static int Open( vlc_object_t *p_this )
p_sys->b_update = false;
p_sys->p_vbi_dec = vbi_decoder_new();
p_sys->p_dvb_demux = vbi_dvb_pes_demux_new( NULL, NULL );
vlc_mutex_init( &p_sys->lock );
if( (p_sys->p_vbi_dec == NULL) || (p_sys->p_dvb_demux == NULL) )
{
......@@ -182,7 +184,7 @@ static int Open( vlc_object_t *p_this )
vbi_event_handler_register( p_sys->p_vbi_dec, VBI_EVENT_TTX_PAGE |
VBI_EVENT_CAPTION | VBI_EVENT_NETWORK |
VBI_EVENT_ASPECT | VBI_EVENT_PROG_INFO,
event_handler, p_dec );
EventHandler, p_dec );
/* Create the var on vlc_global. */
p_sys->i_wanted_page = var_CreateGetInteger( p_dec, "vbi-page" );
......@@ -214,18 +216,28 @@ static void Close( vlc_object_t *p_this )
decoder_t *p_dec = (decoder_t*) p_this;
decoder_sys_t *p_sys = p_dec->p_sys;
var_Destroy( p_dec, "vbi-opaque" );
var_Destroy( p_dec, "vbi-page" );
var_DelCallback( p_dec, "vbi-page", RequestPage, p_sys );
var_DelCallback( p_dec, "vbi-position", Position, p_sys );
var_DelCallback( p_dec, "vbi-opaque", Opaque, p_sys );
var_DelCallback( p_dec, "vbi-page", RequestPage, p_sys );
vlc_mutex_destroy( &p_sys->lock );
if( p_sys->p_vbi_dec ) vbi_decoder_delete( p_sys->p_vbi_dec );
if( p_sys->p_dvb_demux ) vbi_dvb_demux_delete( p_sys->p_dvb_demux );
if( p_sys->p_vbi_dec )
vbi_decoder_delete( p_sys->p_vbi_dec );
if( p_sys->p_dvb_demux )
vbi_dvb_demux_delete( p_sys->p_dvb_demux );
free( p_sys );
}
#define MAX_SLICES 32
#ifdef WORDS_BIGENDIAN
# define ZVBI_PIXFMT_RGBA32 VBI_PIXFMT_RGBA32_BE
#else
# define ZVBI_PIXFMT_RGBA32 VBI_PIXFMT_RGBA32_LE
#endif
/*****************************************************************************
* Decode:
*****************************************************************************/
......@@ -262,24 +274,32 @@ static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
vbi_decode( p_sys->p_vbi_dec, p_sliced, i_lines, i_pts / 90000.0 );
}
/* */
vlc_mutex_lock( &p_sys->lock );
const int i_align = p_sys->i_align;
const unsigned int i_wanted_page = p_sys->i_wanted_page;
const bool b_opaque = p_sys->b_opaque;
vlc_mutex_unlock( &p_sys->lock );
/* Try to see if the page we want is in the cache yet */
b_cached = vbi_fetch_vt_page( p_sys->p_vbi_dec, &p_page,
vbi_dec2bcd( p_sys->i_wanted_page ),
vbi_dec2bcd( i_wanted_page ),
VBI_ANY_SUBNO, VBI_WST_LEVEL_3p5,
25, FALSE );
if( !b_cached )
goto error;
if( ( p_sys->i_wanted_page == p_sys->i_last_page ) &&
if( ( i_wanted_page == p_sys->i_last_page ) &&
( p_sys->b_update != true ) )
goto error;
p_sys->b_update = false;
p_sys->i_last_page = p_sys->i_wanted_page;
p_sys->i_last_page = i_wanted_page;
#ifdef ZVBI_DEBUG
msg_Dbg( p_dec, "we now have page: %d ready for display",
p_sys->i_wanted_page );
i_wanted_page );
#endif
/* If there is a page or sub to render, then we do that here */
/* Create the subpicture unit */
......@@ -295,13 +315,17 @@ static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
fmt.i_chroma = p_sys->b_text ? VLC_FOURCC('T','E','X','T') :
VLC_FOURCC('R','G','B','A');
fmt.i_aspect = p_sys->b_text ? 0 : VOUT_ASPECT_FACTOR;
if( !p_sys->b_text )
if( p_sys->b_text )
{
fmt.i_bits_per_pixel = 0;
}
else
{
fmt.i_sar_num = fmt.i_sar_den = 1;
fmt.i_width = fmt.i_visible_width = p_page.columns * 12;
fmt.i_height = fmt.i_visible_height = p_page.rows * 10;
fmt.i_bits_per_pixel = 32;
}
fmt.i_bits_per_pixel = p_sys->b_text ? 0 : 32;
fmt.i_x_offset = fmt.i_y_offset = 0;
p_spu->p_region = p_spu->pf_create_region( VLC_OBJECT(p_dec), &fmt );
......@@ -313,7 +337,7 @@ static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
p_spu->p_region->i_x = 0;
p_spu->p_region->i_y = 0;
p_spu->p_region->i_align = p_sys->i_align;
p_spu->p_region->i_align = i_align;
/* Normal text subs, easy markup */
p_spu->i_flags = SUBPICTURE_ALIGN_BOTTOM;
......@@ -323,19 +347,6 @@ static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
p_spu->b_ephemer = true;
p_spu->b_absolute = false;
p_spu->b_pausable = true;
if( !p_sys->b_text )
{
p_spu->i_width = fmt.i_width;
p_spu->i_height = fmt.i_height;
p_spu->i_original_picture_width = p_page.columns * 12;
p_spu->i_original_picture_height = p_page.rows * 10;
}
#ifdef WORDS_BIGENDIAN
# define ZVBI_PIXFMT_RGBA32 VBI_PIXFMT_RGBA32_BE
#else
# define ZVBI_PIXFMT_RGBA32 VBI_PIXFMT_RGBA32_LE
#endif
if( p_sys->b_text )
{
......@@ -347,7 +358,8 @@ static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
"UTF-8", 0, 0, 0, 0, p_page.columns, p_page.rows );
p_text[i_total] = '\0';
/* Strip off the pagenumber */
if( i_total <= 40 ) goto error;
if( i_total <= 40 )
goto error;
p_spu->p_region->psz_text = strdup( &p_text[8] );
#ifdef ZVBI_DEBUG
......@@ -356,20 +368,22 @@ static subpicture_t *Decode( decoder_t *p_dec, block_t **pp_block )
}
else
{
picture_t *p_pic;
picture_t *p_pic = &p_spu->p_region->picture;
/* ZVBI is stupid enough to assume pitch == width */
p_pic->p->i_pitch = 4 * fmt.i_width;
vbi_draw_vt_page( &p_page, ZVBI_PIXFMT_RGBA32,
p_spu->p_region->picture.p->p_pixels, 1, 1 );
p_spu->p_region->picture.p->i_lines = p_page.rows * 10;
p_spu->p_region->picture.p->i_pitch = p_page.columns * 12 * 4;
OpaquePage( p_dec, p_page, fmt, &p_spu->p_region->picture, b_opaque );
p_pic = &(p_spu->p_region->picture);
OpaquePage( p_dec, p_page, fmt, &p_pic );
/* */
p_spu->i_width =
p_spu->i_original_picture_width = fmt.i_width;
p_spu->i_height =
p_spu->i_original_picture_height = fmt.i_height;
}
#undef ZVBI_PIXFMT_RGBA32
vbi_unref_page( &p_page );
block_Release( p_block );
return p_spu;
......@@ -386,7 +400,7 @@ error:
return NULL;
}
static void event_handler( vbi_event *ev, void *user_data )
static void EventHandler( vbi_event *ev, void *user_data )
{
decoder_t *p_dec = (decoder_t *)user_data;
decoder_sys_t *p_sys = p_dec->p_sys;
......@@ -419,73 +433,59 @@ static void event_handler( vbi_event *ev, void *user_data )
}
static int OpaquePage( decoder_t *p_dec, vbi_page p_page,
video_format_t fmt, picture_t **p_src )
video_format_t fmt, picture_t *p_src, bool b_opaque )
{
decoder_sys_t *p_sys = (decoder_sys_t *) p_dec->p_sys;
uint32_t *p_begin, *p_end;
unsigned int x = 0, y = 0;
vbi_opacity opacity;
unsigned int x, y;
assert( fmt.i_chroma == VLC_FOURCC('R','G','B','A' ) );
/* Kludge since zvbi doesn't provide an option to specify opacity. */
switch( fmt.i_chroma )
for( y = 0; y < fmt.i_height; y++ )
{
case VLC_FOURCC('R','G','B','A' ):
p_begin = (uint32_t *)(*p_src)->p->p_pixels;
p_end = (uint32_t *)(*p_src)->p->p_pixels +
( fmt.i_width * fmt.i_height );
break;
default:
msg_Err( p_dec, "chroma not supported %4.4s", (char *)&fmt.i_chroma );
return VLC_EGENERIC;
}
for( ; p_begin < p_end; p_begin++ )
for( x = 0; x < fmt.i_width; x++ )
{
opacity = p_page.text[ y / 10 * p_page.columns + x / 12 ].opacity;
const vbi_opacity opacity = p_page.text[ y/10 * p_page.columns + x/12 ].opacity;
uint32_t *p_pixel = (uint32_t*)&p_src->p->p_pixels[y * p_src->p->i_pitch + 4*x];
switch( opacity )
{
/* Show video instead of this character */
case VBI_TRANSPARENT_SPACE:
*p_begin = 0;
*p_pixel = 0;
break;
/* To make the boxed text "closed captioning" transparent
* change true to false.
*/
case VBI_OPAQUE:
if( p_sys->b_opaque )
if( b_opaque )
break;
/* Full text transparency. only foreground color is show */
case VBI_TRANSPARENT_FULL:
*p_begin = 0;
*p_pixel = 0;
break;
/* Transparency for boxed text */
case VBI_SEMI_TRANSPARENT:
if( (*p_begin & 0xffffff00) == 0xff )
*p_begin = 0;
if( (*p_pixel & 0xffffff00) == 0xff ) /* FIXME cannot be true ? */
*p_pixel = 0;
break;
}
x++;
if( x >= fmt.i_width )
{
x = 0;
y++;
}
}
/* end of kludge */
return VLC_SUCCESS;
}
/* Callbacks */
static int RequestPage( vlc_object_t *p_this, char const *psz_cmd,
vlc_value_t oldval, vlc_value_t newval, void *p_data )
{
decoder_sys_t *p_sys = p_data;
VLC_UNUSED(p_this); VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
if( (newval.i_int > 0) && (newval.i_int < 999) )
vlc_mutex_lock( &p_sys->lock );
if( newval.i_int > 0 && newval.i_int < 999 )
p_sys->i_wanted_page = newval.i_int;
vlc_mutex_unlock( &p_sys->lock );
return VLC_SUCCESS;
}
......@@ -496,8 +496,10 @@ static int Opaque( vlc_object_t *p_this, char const *psz_cmd,
decoder_sys_t *p_sys = p_data;
VLC_UNUSED(p_this); VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
if( p_sys )
vlc_mutex_lock( &p_sys->lock );
p_sys->b_opaque = newval.b_bool;
vlc_mutex_unlock( &p_sys->lock );
return VLC_SUCCESS;
}
......@@ -507,7 +509,9 @@ static int Position( vlc_object_t *p_this, char const *psz_cmd,
decoder_sys_t *p_sys = p_data;
VLC_UNUSED(p_this); VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval);
if( p_sys )
vlc_mutex_lock( &p_sys->lock );
p_sys->i_align = newval.i_int;
vlc_mutex_unlock( &p_sys->lock );
return VLC_SUCCESS;
}
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