Commit f0fc0b23 authored by Laurent Aimar's avatar Laurent Aimar

Sub filter deadlock fixes.

The original idea and debug come from basos g patch with the following
comment:

"A dead lock was created when adding an spu filter (like marq)
because the same mutex was used for spu->p stuff and sub filter
chain (p_spu->p->p_chain)."

 I implemented the creation/destruction of the chain outside the sub-filter
callback.
parent 8a353bf6
......@@ -90,6 +90,7 @@ struct spu_private_t
uint8_t palette[4][4]; /**< forced palette */
/* Subpiture filters */
char *psz_chain_update;
filter_chain_t *p_chain;
/* */
......@@ -168,8 +169,6 @@ static void spu_del_buffer( filter_t *, subpicture_t * );
static picture_t *spu_new_video_buffer( filter_t * );
static void spu_del_video_buffer( filter_t *, picture_t * );
static int spu_ParseChain( spu_t * );
/* Buffer aloccation fir SUB filter */
static int SubFilterCallback( vlc_object_t *, char const *,
vlc_value_t, vlc_value_t, void * );
......@@ -221,6 +220,7 @@ spu_t *__spu_Create( vlc_object_t *p_this )
vlc_object_attach( p_spu, p_this );
p_sys->psz_chain_update = NULL;
p_sys->p_chain = filter_chain_New( p_spu, "sub filter", false,
SubFilterAllocationInit,
SubFilterAllocationClean,
......@@ -250,27 +250,11 @@ int spu_Init( spu_t *p_spu )
var_Create( p_spu, "sub-filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
var_AddCallback( p_spu, "sub-filter", SubFilterCallback, p_spu );
spu_ParseChain( p_spu );
var_TriggerCallback( p_spu, "sub-filter" );
return VLC_SUCCESS;
}
int spu_ParseChain( spu_t *p_spu )
{
char *psz_parser = var_GetString( p_spu, "sub-filter" );
int i_ret;
if( !psz_parser )
return VLC_EGENERIC;
i_ret = filter_chain_AppendFromString( p_spu->p->p_chain, psz_parser );
free( psz_parser );
return i_ret;
}
/**
* Destroy the subpicture unit
*
......@@ -295,6 +279,7 @@ void spu_Destroy( spu_t *p_spu )
FilterRelease( p_sys->p_scale );
filter_chain_Delete( p_sys->p_chain );
free( p_sys->psz_chain_update );
/* Destroy all remaining subpictures */
SpuHeapClean( &p_sys->heap );
......@@ -566,6 +551,21 @@ subpicture_t *spu_SortSubpictures( spu_t *p_spu, mtime_t display_date,
int i_channel;
subpicture_t *p_subpic = NULL;
/* Update sub-filter chain */
vlc_mutex_lock( &p_sys->lock );
char *psz_chain_update = p_sys->psz_chain_update;
p_sys->psz_chain_update = NULL;
vlc_mutex_unlock( &p_sys->lock );
if( psz_chain_update )
{
filter_chain_Reset( p_sys->p_chain, NULL, NULL );
filter_chain_AppendFromString( p_spu->p->p_chain, psz_chain_update );
free( psz_chain_update );
}
/* Run subpicture filters */
filter_chain_SubFilter( p_sys->p_chain, display_date );
......@@ -1856,12 +1856,13 @@ static int SubFilterCallback( vlc_object_t *p_object, char const *psz_var,
spu_t *p_spu = p_data;
spu_private_t *p_sys = p_spu->p;
VLC_UNUSED(p_object); VLC_UNUSED(oldval);
VLC_UNUSED(newval); VLC_UNUSED(psz_var);
VLC_UNUSED(p_object); VLC_UNUSED(oldval); VLC_UNUSED(psz_var);
vlc_mutex_lock( &p_sys->lock );
filter_chain_Reset( p_sys->p_chain, NULL, NULL );
spu_ParseChain( p_spu );
free( p_sys->psz_chain_update );
p_sys->psz_chain_update = strdup( newval.psz_string );
vlc_mutex_unlock( &p_sys->lock );
return VLC_SUCCESS;
}
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment