* rv32.c: new basic video filter to convert RV24 to RV32

  (remove the dependency of skins2 to ffmpeg for PNG loading)

configure.ac

@@ -979,7 +979,7 @@ dnl
 VLC_ADD_PLUGINS([dummy logger memcpy])
 VLC_ADD_PLUGINS([mpgv mpga m4v m4a h264 ps pva avi asf mp4 rawdv nsv real aiff mjpeg demuxdump flac])
 VLC_ADD_PLUGINS([cvdsub svcdsub spudec subsdec dvbsub mpeg_audio lpcm a52 dts cinepak flacdec])
-VLC_ADD_PLUGINS([deinterlace invert adjust transform distort motionblur])
+VLC_ADD_PLUGINS([deinterlace invert adjust transform distort motionblur rv32])
 VLC_ADD_PLUGINS([fixed32tos16 s16tofixed32 u8tofixed32])
 VLC_ADD_PLUGINS([trivial_resampler ugly_resampler])
 VLC_ADD_PLUGINS([trivial_channel_mixer trivial_mixer])

modules/video_filter/Modules.am

@@ -15,4 +15,5 @@ SOURCES_time = time.c
 SOURCES_marq = marq.c
 SOURCES_rss = rss.c
 SOURCES_motiondetect = motiondetect.c
+SOURCES_rv32 = rv32.c
 noinst_HEADERS += filter_common.h

modules/video_filter/rv32.c

+/*****************************************************************************
+ * rv32.c: conversion plugin to RV32 format.
+ *****************************************************************************
+ * Copyright (C) 2005 the VideoLAN team
+ * $Id$
+ *
+ * Author: Cyril Deguet <asmax@videolan.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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ *****************************************************************************/
+
+/*****************************************************************************
+ * Preamble
+ *****************************************************************************/
+#include <vlc/vlc.h>
+#include <vlc/decoder.h>
+#include "vlc_filter.h"
+
+/*****************************************************************************
+ * filter_sys_t : filter descriptor
+ *****************************************************************************/
+struct filter_sys_t
+{
+    es_format_t fmt_in;
+    es_format_t fmt_out;
+};
+
+/****************************************************************************
+ * Local prototypes
+ ****************************************************************************/
+static int  OpenFilter ( vlc_object_t * );
+static void CloseFilter( vlc_object_t * );
+
+static picture_t *Filter( filter_t *, picture_t * );
+
+/*****************************************************************************
+ * Module descriptor
+ *****************************************************************************/
+vlc_module_begin();
+    set_description( _("RV32 conversion filter") );
+    set_capability( "video filter2", 1 );
+    set_category( CAT_VIDEO );
+    set_subcategory( SUBCAT_VIDEO_VFILTER );
+    set_callbacks( OpenFilter, CloseFilter );
+vlc_module_end();
+
+/*****************************************************************************
+ * OpenFilter: probe the filter and return score
+ *****************************************************************************/
+static int OpenFilter( vlc_object_t *p_this )
+{
+    filter_t *p_filter = (filter_t*)p_this;
+    filter_sys_t *p_sys;
+
+    /* XXX Only support RV24 -> RV32 conversion */
+    if( p_filter->fmt_in.video.i_chroma != VLC_FOURCC('R','V','2','4') ||
+        p_filter->fmt_out.video.i_chroma != VLC_FOURCC('R', 'V', '3', '2') )
+    {
+        return VLC_EGENERIC;
+    }
+
+    /* Allocate the memory needed to store the decoder's structure */
+    if( ( p_filter->p_sys = p_sys =
+          (filter_sys_t *)malloc(sizeof(filter_sys_t)) ) == NULL )
+    {
+        msg_Err( p_filter, "out of memory" );
+        return VLC_EGENERIC;
+    }
+
+    p_filter->pf_video_filter = Filter;
+
+    return VLC_SUCCESS;
+}
+
+/*****************************************************************************
+ * CloseFilter: clean up the filter
+ *****************************************************************************/
+static void CloseFilter( vlc_object_t *p_this )
+{
+    filter_t *p_filter = (filter_t*)p_this;
+    filter_sys_t *p_sys = p_filter->p_sys;
+
+    free( p_sys );
+}
+
+/****************************************************************************
+ * Filter: the whole thing
+ ****************************************************************************/
+static picture_t *Filter( filter_t *p_filter, picture_t *p_pic )
+{
+    picture_t *p_pic_dst;
+    int i_plane, i;
+    unsigned int j;
+
+    /* Request output picture */
+    p_pic_dst = p_filter->pf_vout_buffer_new( p_filter );
+    if( !p_pic_dst )
+    {
+        msg_Warn( p_filter, "can't get output picture" );
+        if( p_pic->pf_release )
+            p_pic->pf_release( p_pic );
+        return NULL;
+    }
+
+    /* Convert RV24 to RV32 */
+    for( i_plane = 0; i_plane < p_pic_dst->i_planes; i_plane++ )
+    {
+        uint8_t *p_src = p_pic->p[i_plane].p_pixels;
+        uint8_t *p_dst = p_pic_dst->p[i_plane].p_pixels;
+        unsigned int i_width = p_filter->fmt_out.video.i_width;
+
+        for( i = 0; i < p_pic_dst->p[i_plane].i_lines; i++ )
+        {
+            for( j = 0; j < i_width; j++ )
+            {
+                *(p_dst++) = p_src[2];
+                *(p_dst++) = p_src[1];
+                *(p_dst++) = p_src[0];
+                *(p_dst++) = 0xff;  /* Alpha */
+                p_src += 3;
+            }
+            p_src += p_pic->p[i_plane].i_pitch - 3 * i_width;
+            p_dst += p_pic_dst->p[i_plane].i_pitch - 4 * i_width;
+        }
+    }
+
+    p_pic_dst->date = p_pic->date;
+    p_pic_dst->b_force = p_pic->b_force;
+    p_pic_dst->i_nb_fields = p_pic->i_nb_fields;
+    p_pic_dst->b_progressive = p_pic->b_progressive;
+    p_pic_dst->b_top_field_first = p_pic->b_top_field_first;
+
+    p_pic->pf_release( p_pic );
+    return p_pic_dst;
+}
+