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libvlc_media_parse: thread-safety

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This commit is contained in:
Rémi Denis-Courmont 2011-07-10 19:31:09 +03:00
parent 4d21a27668
commit c7d87dd271
2 changed files with 41 additions and 47 deletions
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87
src/control/media.c
View File

@ -226,21 +226,6 @@ static void uninstall_input_item_observer( libvlc_media_t *p_md )
p_md );
}
/**************************************************************************
* Preparse if not already done (Private)
**************************************************************************/
static void preparse_if_needed( libvlc_media_t *p_md )
{
/* XXX: need some locking here */
if (!p_md->has_asked_preparse)
{
playlist_PreparseEnqueue(
libvlc_priv (p_md->p_libvlc_instance->p_libvlc_int)->p_playlist,
p_md->p_input_item );
p_md->has_asked_preparse = true;
}
}
/**************************************************************************
* Create a new media descriptor object from an input_item
* (libvlc internal)
@ -467,24 +452,8 @@ libvlc_media_get_mrl( libvlc_media_t * p_md )
char *libvlc_media_get_meta( libvlc_media_t *p_md, libvlc_meta_t e_meta )
{
char * psz_meta;
assert( p_md );
/* XXX: locking */
preparse_if_needed( p_md );
psz_meta = input_item_GetMeta( p_md->p_input_item,
libvlc_to_vlc_meta[e_meta] );
if( e_meta == libvlc_meta_ArtworkURL && !psz_meta && !p_md->has_asked_art )
{
p_md->has_asked_art = true;
playlist_AskForArtEnqueue(
libvlc_priv(p_md->p_libvlc_instance->p_libvlc_int)->p_playlist,
p_md->p_input_item );
}
char *psz_meta = input_item_GetMeta( p_md->p_input_item,
libvlc_to_vlc_meta[e_meta] );
/* Should be integrated in core */
if( psz_meta == NULL && e_meta == libvlc_meta_Title
&& p_md->p_input_item->psz_name != NULL )
@ -614,49 +583,75 @@ libvlc_media_get_duration( libvlc_media_t * p_md )
return -1;
}
preparse_if_needed( p_md );
if (!input_item_IsPreparsed( p_md->p_input_item ))
return -1;
return from_mtime(input_item_GetDuration( p_md->p_input_item ));
}
static int media_parse(libvlc_media_t *media)
{
/* TODO: fetcher and parser independent of playlist */
playlist_t *playlist =
libvlc_priv (media->p_libvlc_instance->p_libvlc_int)->p_playlist;
/* TODO: Fetch art on need basis. But how not to break compatibility? */
playlist_AskForArtEnqueue(playlist, media->p_input_item );
return playlist_PreparseEnqueue(playlist, media->p_input_item);
}
/**************************************************************************
* Parse the media.
* Parse the media and wait.
**************************************************************************/
void
libvlc_media_parse(libvlc_media_t *media)
{
preparse_if_needed(media);
vlc_mutex_lock(&media->parsed_lock);
if (!media->has_asked_preparse)
{
media->has_asked_preparse = true;
vlc_mutex_unlock(&media->parsed_lock);
if (media_parse(media))
/* Parse failed: do not wait! */
return;
vlc_mutex_lock(&media->parsed_lock);
}
while (!media->is_parsed)
vlc_cond_wait(&media->parsed_cond, &media->parsed_lock);
vlc_mutex_unlock(&media->parsed_lock);
}
/**************************************************************************
* Parse the media.
* Parse the media but do not wait.
**************************************************************************/
void
libvlc_media_parse_async(libvlc_media_t *media)
{
preparse_if_needed(media);
bool needed;
vlc_mutex_lock(&media->parsed_lock);
needed = media->has_asked_preparse;
media->has_asked_preparse = true;
vlc_mutex_unlock(&media->parsed_lock);
if (needed)
media_parse(media);
}
/**************************************************************************
* Get parsed status for media object.
**************************************************************************/
int
libvlc_media_is_parsed( libvlc_media_t * p_md )
libvlc_media_is_parsed(libvlc_media_t *media)
{
assert( p_md );
bool parsed;
if( !p_md->p_input_item )
return false;
return input_item_IsPreparsed( p_md->p_input_item );
vlc_mutex_lock(&media->parsed_lock);
parsed = media->is_parsed;
vlc_mutex_unlock(&media->parsed_lock);
return parsed;
}
/**************************************************************************

1
src/control/media_internal.h
View File

@ -46,7 +46,6 @@ struct libvlc_media_t
bool is_parsed;
bool has_asked_preparse;
bool has_asked_art;
};
/* Media Descriptor */