+/*****************************************************************************
+ * interlacing.c
+ *****************************************************************************
+ * Copyright (C) 2010 Laurent Aimar
+ * $Id$
+ *
+ * Authors: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <assert.h>
+
+#include <vlc_common.h>
+#include <vlc_vout.h>
+
+#include "interlacing.h"
+
+/*****************************************************************************
+ * Deinterlacing
+ *****************************************************************************/
+/* XXX
+ * You can use the non vout filter if and only if the video properties stay the
+ * same (width/height/chroma/fps), at least for now.
+ */
+static const char *deinterlace_modes[] = {
+ ""
+ //"discard",
+ "blend",
+ //"mean",
+ //"bob",
+ //"linear",
+ "x",
+ //"yadif",
+ //"yadif2x",
+ NULL
+};
+static bool DeinterlaceIsModeValid(const char *mode)
+{
+ for (unsigned i = 0; deinterlace_modes[i]; i++) {
+ if( !strcmp(deinterlace_modes[i], mode))
+ return true;
+ }
+ return false;
+}
+
+static char *FilterFind( char *psz_filter_base, const char *psz_module )
+{
+ const size_t i_module = strlen( psz_module );
+ const char *psz_filter = psz_filter_base;
+
+ if( !psz_filter || i_module <= 0 )
+ return NULL;
+
+ for( ;; )
+ {
+ char *psz_find = strstr( psz_filter, psz_module );
+ if( !psz_find )
+ return NULL;
+ if( psz_find[i_module] == '\0' || psz_find[i_module] == ':' )
+ return psz_find;
+ psz_filter = &psz_find[i_module];
+ }
+}
+
+static bool DeinterlaceIsPresent( vout_thread_t *p_vout )
+{
+ char *psz_filter = var_GetNonEmptyString( p_vout, "video-filter" );
+
+ bool b_found = FilterFind( psz_filter, "deinterlace" ) != NULL;
+
+ free( psz_filter );
+
+ return b_found;
+}
+
+static void DeinterlaceRemove( vout_thread_t *p_vout )
+{
+ char *psz_filter = var_GetNonEmptyString( p_vout, "video-filter" );
+
+ char *psz = FilterFind( psz_filter, "deinterlace" );
+ if( !psz )
+ {
+ free( psz_filter );
+ return;
+ }
+
+ /* */
+ strcpy( &psz[0], &psz[strlen("deinterlace")] );
+ if( *psz == ':' )
+ strcpy( &psz[0], &psz[1] );
+
+ var_SetString( p_vout, "video-filter", psz_filter );
+ free( psz_filter );
+}
+static void DeinterlaceAdd( vout_thread_t *p_vout )
+{
+ char *psz_filter = var_GetNonEmptyString( p_vout, "video-filter" );
+
+ if( FilterFind( psz_filter, "deinterlace" ) )
+ {
+ free( psz_filter );
+ return;
+ }
+
+ /* */
+ if( psz_filter )
+ {
+ char *psz_tmp = psz_filter;
+ if( asprintf( &psz_filter, "%s:%s", psz_tmp, "deinterlace" ) < 0 )
+ psz_filter = psz_tmp;
+ else
+ free( psz_tmp );
+ }
+ else
+ {
+ psz_filter = strdup( "deinterlace" );
+ }
+
+ if( psz_filter )
+ {
+ var_SetString( p_vout, "video-filter", psz_filter );
+ free( psz_filter );
+ }
+}
+
+static void DeinterlaceSave( vout_thread_t *p_vout, int i_deinterlace, const char *psz_mode )
+{
+ /* We have to set input variable to ensure restart support
+ * FIXME to be removed when vout_Request does the right job.
+ */
+ vlc_object_t *p_input = vlc_object_find( p_vout, VLC_OBJECT_INPUT, FIND_PARENT );
+ if( !p_input )
+ return;
+
+ var_Create( p_input, "deinterlace", VLC_VAR_INTEGER );
+ var_SetInteger( p_input, "deinterlace", i_deinterlace );
+
+ static const char * const ppsz_variable[] = {
+ "deinterlace-mode",
+ "sout-deinterlace-mode",
+ NULL
+ };
+ for( int i = 0; ppsz_variable[i]; i++ )
+ {
+ var_Create( p_input, ppsz_variable[i], VLC_VAR_STRING );
+ var_SetString( p_input, ppsz_variable[i], psz_mode );
+ }
+
+ vlc_object_release( p_input );
+}
+static int DeinterlaceCallback( vlc_object_t *p_this, char const *psz_cmd,
+ vlc_value_t oldval, vlc_value_t newval, void *p_data )
+{
+ VLC_UNUSED(psz_cmd); VLC_UNUSED(oldval); VLC_UNUSED(newval); VLC_UNUSED(p_data);
+ vout_thread_t *p_vout = (vout_thread_t *)p_this;
+
+ /* */
+ const int i_deinterlace = var_GetInteger( p_this, "deinterlace" );
+ char *psz_mode = var_GetString( p_this, "deinterlace-mode" );
+ const bool is_needed = var_GetBool( p_this, "deinterlace-needed" );
+ if( !psz_mode || !DeinterlaceIsModeValid(psz_mode) )
+ return VLC_EGENERIC;
+
+ DeinterlaceSave( p_vout, i_deinterlace, psz_mode );
+
+ /* */
+ char *psz_old = var_CreateGetString( p_vout, "sout-deinterlace-mode" );
+
+ msg_Dbg( p_vout, "deinterlace %d, mode %s, is_needed %d", i_deinterlace, psz_mode, is_needed );
+ if( i_deinterlace == 0 || ( i_deinterlace == -1 && !is_needed ) )
+ {
+ DeinterlaceRemove( p_vout );
+ }
+ else if( !DeinterlaceIsPresent( p_vout ) )
+ {
+ DeinterlaceAdd( p_vout );
+ }
+ else if( psz_old && strcmp( psz_old, psz_mode ) )
+ {
+ var_TriggerCallback( p_vout, "video-filter" );
+ }
+
+ /* */
+ free( psz_old );
+ free( psz_mode );
+ return VLC_SUCCESS;
+}
+
+void vout_InitInterlacingSupport( vout_thread_t *p_vout, bool is_interlaced )
+{
+ vlc_value_t val, text;
+
+ msg_Dbg( p_vout, "Deinterlacing available" );
+
+ /* Create the configuration variables */
+ /* */
+ var_Create( p_vout, "deinterlace", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT | VLC_VAR_HASCHOICE );
+ int i_deinterlace = var_GetInteger( p_vout, "deinterlace" );
+
+ text.psz_string = _("Deinterlace");
+ var_Change( p_vout, "deinterlace", VLC_VAR_SETTEXT, &text, NULL );
+
+ const module_config_t *p_optd = config_FindConfig( VLC_OBJECT(p_vout), "deinterlace" );
+ var_Change( p_vout, "deinterlace", VLC_VAR_CLEARCHOICES, NULL, NULL );
+ for( int i = 0; p_optd && i < p_optd->i_list; i++ )
+ {
+ val.i_int = p_optd->pi_list[i];
+ text.psz_string = (char*)vlc_gettext(p_optd->ppsz_list_text[i]);
+ var_Change( p_vout, "deinterlace", VLC_VAR_ADDCHOICE, &val, &text );
+ }
+ var_AddCallback( p_vout, "deinterlace", DeinterlaceCallback, NULL );
+ /* */
+ var_Create( p_vout, "deinterlace-mode", VLC_VAR_STRING | VLC_VAR_DOINHERIT | VLC_VAR_HASCHOICE );
+ char *psz_deinterlace = var_GetNonEmptyString( p_vout, "deinterlace-mode" );
+
+ text.psz_string = _("Deinterlace mode");
+ var_Change( p_vout, "deinterlace-mode", VLC_VAR_SETTEXT, &text, NULL );
+
+ const module_config_t *p_optm = config_FindConfig( VLC_OBJECT(p_vout), "deinterlace-mode" );
+ var_Change( p_vout, "deinterlace-mode", VLC_VAR_CLEARCHOICES, NULL, NULL );
+ for( int i = 0; p_optm && i < p_optm->i_list; i++ )
+ {
+ if( !DeinterlaceIsModeValid( p_optm->ppsz_list[i] ) )
+ continue;
+
+ val.psz_string = p_optm->ppsz_list[i];
+ text.psz_string = (char*)vlc_gettext(p_optm->ppsz_list_text[i]);
+ var_Change( p_vout, "deinterlace-mode", VLC_VAR_ADDCHOICE, &val, &text );
+ }
+ var_AddCallback( p_vout, "deinterlace-mode", DeinterlaceCallback, NULL );
+ /* */
+ var_Create( p_vout, "deinterlace-needed", VLC_VAR_BOOL );
+ var_AddCallback( p_vout, "deinterlace-needed", DeinterlaceCallback, NULL );
+
+ /* Override the initial value from filters if present */
+ char *psz_filter_mode = NULL;
+ if( DeinterlaceIsPresent( p_vout ) )
+ psz_filter_mode = var_CreateGetNonEmptyString( p_vout, "sout-deinterlace-mode" );
+ if( psz_filter_mode )
+ {
+ free( psz_deinterlace );
+ if( i_deinterlace >= -1 )
+ i_deinterlace = 1;
+ psz_deinterlace = psz_filter_mode;
+ }
+
+ /* */
+ if( i_deinterlace < 0 )
+ i_deinterlace = -1;
+
+ /* */
+ val.psz_string = psz_deinterlace ? psz_deinterlace : p_optm->orig.psz;
+ var_Change( p_vout, "deinterlace-mode", VLC_VAR_SETVALUE, &val, NULL );
+ val.b_bool = is_interlaced;
+ var_Change( p_vout, "deinterlace-needed", VLC_VAR_SETVALUE, &val, NULL );
+
+ var_SetInteger( p_vout, "deinterlace", i_deinterlace );
+ free( psz_deinterlace );
+}
+
+void vout_SetInterlacingState( vout_thread_t *p_vout, vout_interlacing_support_t *state, bool is_interlaced )
+{
+ /* Wait 30s before quiting interlacing mode */
+ const int interlacing_change = (!!is_interlaced) - (!!state->is_interlaced);
+ if ((interlacing_change == 1) ||
+ (interlacing_change == -1 && state->date + 30000000 < mdate())) {
+
+ msg_Dbg( p_vout, "Detected %s video",
+ is_interlaced ? "interlaced" : "progressive" );
+ var_SetBool( p_vout, "deinterlace-needed", is_interlaced );
+
+ state->is_interlaced = is_interlaced;
+ }
+ if (is_interlaced)
+ state->date = mdate();
+}
+
+