+
+/*****************************************************************************
+ * 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 */
+ filter_chain_Reset( p_sys->p_chain, &p_filter->fmt_in, &p_filter->fmt_out );
+
+ 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, NULL );
+ es_format_Clean( &fmt_mid );
+ if( i_ret == VLC_SUCCESS )
+ return VLC_SUCCESS;
+
+ /* Lets try it the other way arround (chroma and then resize) */
+ filter_chain_Reset( p_sys->p_chain, &p_filter->fmt_in, &p_filter->fmt_out );
+
+ 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, NULL );
+ 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;
+
+ /* We have to protect ourself against a too high recursion */
+ const char *psz_option = MODULE_STRING"-level";
+ int i_level = 0;
+ for( const config_chain_t *c = p_filter->p_cfg; c != NULL; c = c->p_next)
+ {
+ if( c->psz_name && c->psz_value && !strcmp(c->psz_name, psz_option) )
+ {
+ i_level = atoi(c->psz_value);
+ if( i_level < 0 || i_level > CHAIN_LEVEL_MAX )
+ {
+ msg_Err( p_filter, "Too high level of recursion (%d)", i_level );
+ return VLC_EGENERIC;
+ }
+ break;
+ }
+ }
+
+ /* */
+ int i_ret = VLC_EGENERIC;
+
+ /* */
+ config_chain_t cfg_level;
+ memset(&cfg_level, 0, sizeof(cfg_level));
+ cfg_level.psz_name = strdup(psz_option);
+ if( asprintf( &cfg_level.psz_value, "%d", i_level + 1) < 0 )
+ cfg_level.psz_value = NULL;
+ if( !cfg_level.psz_name || !cfg_level.psz_value )
+ goto exit;
+
+ /* Now try chroma format list */
+ for( int i = 0; pi_allowed_chromas[i]; i++ )
+ {
+ const vlc_fourcc_t i_chroma = pi_allowed_chromas[i];
+ if( i_chroma == p_filter->fmt_in.i_codec ||
+ i_chroma == p_filter->fmt_out.i_codec )
+ continue;
+
+ 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.i_codec =
+ fmt_mid.video.i_chroma = i_chroma;
+ fmt_mid.video.i_rmask = 0;
+ fmt_mid.video.i_gmask = 0;
+ fmt_mid.video.i_bmask = 0;
+ video_format_FixRgb(&fmt_mid.video);
+
+ filter_chain_Reset( p_sys->p_chain, &p_filter->fmt_in, &p_filter->fmt_out );
+
+ i_ret = CreateChain( p_sys->p_chain, &fmt_mid, &cfg_level );
+ es_format_Clean( &fmt_mid );
+
+ if( i_ret == VLC_SUCCESS )
+ break;
+ }
+
+exit:
+ free( cfg_level.psz_name );
+ free( cfg_level.psz_value );
+ return i_ret;
+}
+
+/*****************************************************************************
+ * Buffer management
+ *****************************************************************************/
+static picture_t *BufferNew( filter_t *p_filter )
+{
+ filter_t *p_parent = (filter_t*)p_filter->p_owner;
+
+ return filter_NewPicture( p_parent );
+}
+static void BufferDel( filter_t *p_filter, picture_t *p_pic )
+{
+ filter_t *p_parent = (filter_t*)p_filter->p_owner;
+
+ return filter_DeletePicture( p_parent, p_pic );
+}
+static int BufferAllocationInit ( filter_t *p_filter, void *p_data )
+{
+ p_filter->pf_video_buffer_new = BufferNew;
+ p_filter->pf_video_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, config_chain_t *p_cfg )
+{
+ filter_t *p_filter1;
+ if( !( p_filter1 =
+ filter_chain_AppendFilter( p_chain, NULL, p_cfg, NULL, p_fmt_mid )) )
+ return VLC_EGENERIC;
+ if( !filter_chain_AppendFilter( p_chain, NULL, p_cfg, 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;
+}
+