#include <vlc_plugin.h>
#include <vlc_filter.h>
-/*****************************************************************************
- * Local and extern prototypes.
- *****************************************************************************/
-static int Activate ( vlc_object_t * );
-static void Destroy ( vlc_object_t * );
-static picture_t *Chain( filter_t *, picture_t * );
-static int AllocInit( filter_t *p_filter, void *p_data );
-
/*****************************************************************************
* Module descriptor
*****************************************************************************/
+static int Activate ( vlc_object_t * );
+static void Destroy ( vlc_object_t * );
+
vlc_module_begin();
set_description( N_("Video filtering using a chain of video filter modules") );
set_capability( "video filter2", 1 );
set_callbacks( Activate, Destroy );
vlc_module_end();
-#define MAX_FILTERS 4
+/*****************************************************************************
+ * Local prototypes.
+ *****************************************************************************/
+static picture_t *Chain ( filter_t *, picture_t * );
+static int BufferAllocationInit ( filter_t *, void * );
-struct filter_sys_t
-{
- filter_chain_t *p_chain;
-};
+static int BuildChromaResize( filter_t * );
+static int BuildChromaChain( filter_t *p_filter );
+
+static int CreateChain( filter_chain_t *p_chain, es_format_t *p_fmt_mid );
+static void EsFormatMergeSize( es_format_t *p_dst,
+ const es_format_t *p_base,
+ const es_format_t *p_size );
static const vlc_fourcc_t pi_allowed_chromas[] = {
VLC_FOURCC('I','4','2','0'),
0
};
-static int CreateChain( filter_chain_t *p_chain, es_format_t *p_fmt_mid )
+struct filter_sys_t
{
- filter_t *p_filter1;
- if( !( p_filter1 =
- filter_chain_AppendFilter( p_chain, NULL, NULL, NULL, p_fmt_mid )) )
- return VLC_EGENERIC;
- if( !filter_chain_AppendFilter( p_chain, NULL, NULL, p_fmt_mid, NULL ) )
- {
- filter_chain_DeleteFilter( p_chain, p_filter1 );
- return VLC_EGENERIC;
- }
- return VLC_SUCCESS;
-}
+ filter_chain_t *p_chain;
+};
-static int AllocInit( filter_t *p_filter, void *p_data )
-{
- /* Not sure about all of this ... it should work */
- p_filter->pf_vout_buffer_new = ((filter_t*)p_data)->pf_vout_buffer_new;
- p_filter->pf_vout_buffer_del = ((filter_t*)p_data)->pf_vout_buffer_del;
- p_filter->p_owner = ((filter_t*)p_data)->p_owner;
- return VLC_SUCCESS;
-}
+#define CHAIN_LEVEL_MAX 4
/*****************************************************************************
* Activate: allocate a chroma function
static int Activate( vlc_object_t *p_this )
{
filter_t *p_filter = (filter_t *)p_this;
- static int hack = 0; /* FIXME */
- es_format_t fmt_mid;
+ filter_sys_t *p_sys;
+ int i_ret;
- if( p_filter->fmt_in.video.i_chroma == p_filter->fmt_out.video.i_chroma )
- return VLC_EGENERIC;
+ const bool b_chroma = p_filter->fmt_in.video.i_chroma != p_filter->fmt_out.video.i_chroma;
+ const bool b_resize = p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width ||
+ p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height;
- hack++;
- if( hack >= MAX_FILTERS )
- {
- msg_Err( p_this, "Preventing chain filter reccursion (already %d long)",
- hack );
+ /* XXX Remove check on b_resize to build chroma chain (untested) */
+ if( !b_chroma || !b_resize )
return VLC_EGENERIC;
- }
- filter_sys_t *p_sys = (filter_sys_t *)malloc( sizeof( filter_sys_t ) );
+ p_sys = p_filter->p_sys = malloc( sizeof( *p_sys ) );
if( !p_sys )
- {
- hack--;
return VLC_ENOMEM;
- }
- memset( p_sys, 0, sizeof( filter_sys_t ) );
- p_filter->p_sys = p_sys;
- p_sys->p_chain = filter_chain_New( p_filter, "video filter2", false, AllocInit, NULL, p_filter );
+ memset( p_sys, 0, sizeof( *p_sys ) );
+
+ p_sys->p_chain = filter_chain_New( p_filter, "video filter2", false, BufferAllocationInit, NULL, p_filter );
if( !p_sys->p_chain )
{
free( p_sys );
}
filter_chain_Reset( p_sys->p_chain, &p_filter->fmt_in, &p_filter->fmt_out );
- if( p_filter->fmt_in.video.i_width != p_filter->fmt_out.video.i_width ||
- p_filter->fmt_in.video.i_height != p_filter->fmt_out.video.i_height ||
- p_filter->fmt_in.video.i_visible_width != p_filter->fmt_out.video.i_visible_width ||
- p_filter->fmt_in.video.i_visible_height != p_filter->fmt_out.video.i_visible_height )
- {
- /* Lets try resizing and then doing the chroma conversion */
- es_format_Copy( &fmt_mid, &p_filter->fmt_out );
- fmt_mid.video.i_chroma = p_filter->fmt_in.video.i_chroma;
- if( CreateChain( p_sys->p_chain, &fmt_mid ) == VLC_SUCCESS )
- {
- es_format_Clean( &fmt_mid );
- p_filter->pf_video_filter = Chain;
- return VLC_SUCCESS;
- }
-
- /* Lets try it the other way arround (chroma and then resize) */
- es_format_Clean( &fmt_mid );
- es_format_Copy( &fmt_mid, &p_filter->fmt_in );
- fmt_mid.video.i_chroma = p_filter->fmt_out.video.i_chroma;
- if( CreateChain( p_sys->p_chain, &fmt_mid ) == VLC_SUCCESS )
- {
- es_format_Clean( &fmt_mid );
- p_filter->pf_video_filter = Chain;
- return VLC_SUCCESS;
- }
- }
+ if( b_chroma && b_resize )
+ i_ret = BuildChromaResize( p_filter );
+ else if( b_chroma )
+ i_ret = BuildChromaChain( p_filter );
else
+ i_ret = VLC_EGENERIC;
+
+ if( i_ret )
{
- /* Lets try doing a chroma chain */
- int i;
- es_format_Copy( &fmt_mid, &p_filter->fmt_in );
- for( i = 0; pi_allowed_chromas[i]; i++ )
- {
- fmt_mid.video.i_chroma = pi_allowed_chromas[i];
- if( CreateChain( p_sys->p_chain, &fmt_mid ) == VLC_SUCCESS )
- {
- es_format_Clean( &fmt_mid );
- p_filter->pf_video_filter = Chain;
- return VLC_SUCCESS;
- }
- }
+ /* Hum ... looks like this really isn't going to work. Too bad. */
+ filter_chain_Delete( p_sys->p_chain );
+ free( p_sys );
+ return VLC_EGENERIC;
}
-
- /* Hum ... looks like this really isn't going to work. Too bad. */
- es_format_Clean( &fmt_mid );
- filter_chain_Delete( p_sys->p_chain );
- free( p_sys );
- hack--;
- return VLC_EGENERIC;
+ /* */
+ p_filter->pf_video_filter = Chain;
+ return VLC_SUCCESS;
}
static void Destroy( vlc_object_t *p_this )
{
return filter_chain_VideoFilter( p_filter->p_sys->p_chain, p_pic );
}
+
+/*****************************************************************************
+ * Builders
+ *****************************************************************************/
+static int BuildChromaResize( filter_t *p_filter )
+{
+ filter_sys_t *p_sys = p_filter->p_sys;
+ es_format_t fmt_mid;
+ int i_ret;
+
+ /* Lets try resizing and then doing the chroma conversion */
+ msg_Dbg( p_filter, "Trying to build resize+chroma" );
+ EsFormatMergeSize( &fmt_mid, &p_filter->fmt_in, &p_filter->fmt_out );
+ i_ret = CreateChain( p_sys->p_chain, &fmt_mid );
+ es_format_Clean( &fmt_mid );
+ if( i_ret == VLC_SUCCESS )
+ return VLC_SUCCESS;
+
+ /* Lets try it the other way arround (chroma and then resize) */
+ msg_Dbg( p_filter, "Trying to build chroma+resize" );
+ EsFormatMergeSize( &fmt_mid, &p_filter->fmt_out, &p_filter->fmt_in );
+ i_ret = CreateChain( p_sys->p_chain, &fmt_mid );
+ es_format_Clean( &fmt_mid );
+ if( i_ret == VLC_SUCCESS )
+ return VLC_SUCCESS;
+
+ return VLC_EGENERIC;
+}
+
+static int BuildChromaChain( filter_t *p_filter )
+{
+ filter_sys_t *p_sys = p_filter->p_sys;
+ es_format_t fmt_mid;
+ int i_ret;
+ int i;
+
+ /* We have to protect ourself against a too high recursion */
+ const char *psz_option = MODULE_STRING"-level";
+ bool b_first = !var_Type( p_filter, psz_option );
+
+ if( var_Create( p_filter, MODULE_STRING"-level", VLC_VAR_INTEGER | (b_first ? VLC_VAR_DOINHERIT : 0 ) ) )
+ {
+ msg_Err( p_filter, "Failed to create %s variable\n", psz_option );
+ return VLC_EGENERIC;
+ }
+ int i_level = var_GetInteger( p_filter, psz_option );
+ if( i_level >= CHAIN_LEVEL_MAX )
+ {
+ msg_Err( p_filter, "Too high level of recursion (%d)\n", i_level );
+ return VLC_EGENERIC;
+ }
+ var_SetInteger( p_filter, psz_option, i_level + 1 );
+
+ /* Now try chroma format list */
+ for( i = 0; pi_allowed_chromas[i]; i++ )
+ {
+ const vlc_fourcc_t i_chroma = pi_allowed_chromas[i];
+
+ msg_Dbg( p_filter, "Trying to use chroma %4.4s as middle man",
+ (char*)&i_chroma );
+
+ es_format_Copy( &fmt_mid, &p_filter->fmt_in );
+ fmt_mid.video.i_chroma = i_chroma;
+
+ i_ret = CreateChain( p_sys->p_chain, &fmt_mid );
+ es_format_Clean( &fmt_mid );
+
+ if( i_ret == VLC_SUCCESS )
+ return VLC_SUCCESS;
+ }
+ return VLC_EGENERIC;
+}
+
+/*****************************************************************************
+ * Buffer management
+ *****************************************************************************/
+static picture_t *BufferNew( filter_t *p_filter )
+{
+ filter_t *p_parent = (filter_t*)p_filter->p_owner;
+
+ return p_parent->pf_vout_buffer_new( p_parent );
+}
+static void BufferDel( filter_t *p_filter, picture_t *p_pic )
+{
+ filter_t *p_parent = (filter_t*)p_filter->p_owner;
+
+ p_parent->pf_vout_buffer_del( p_parent, p_pic );
+}
+static int BufferAllocationInit ( filter_t *p_filter, void *p_data )
+{
+ p_filter->pf_vout_buffer_new = BufferNew;
+ p_filter->pf_vout_buffer_del = BufferDel;
+ p_filter->p_owner = p_data;
+ return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ *
+ *****************************************************************************/
+static int CreateChain( filter_chain_t *p_chain, es_format_t *p_fmt_mid )
+{
+ filter_t *p_filter1;
+ if( !( p_filter1 =
+ filter_chain_AppendFilter( p_chain, NULL, NULL, NULL, p_fmt_mid )) )
+ return VLC_EGENERIC;
+ if( !filter_chain_AppendFilter( p_chain, NULL, NULL, p_fmt_mid, NULL ) )
+ {
+ filter_chain_DeleteFilter( p_chain, p_filter1 );
+ return VLC_EGENERIC;
+ }
+ return VLC_SUCCESS;
+}
+
+static void EsFormatMergeSize( es_format_t *p_dst,
+ const es_format_t *p_base,
+ const es_format_t *p_size )
+{
+ es_format_Copy( p_dst, p_base );
+
+ p_dst->video.i_width = p_size->video.i_width;
+ p_dst->video.i_height = p_size->video.i_height;
+
+ p_dst->video.i_visible_width = p_size->video.i_visible_width;
+ p_dst->video.i_visible_height = p_size->video.i_visible_height;
+}
+
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