/*
  * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 /**
  * @file
  * swap UV filter
  */
 
 #include "avfilter.h"

 #include "formats.h"

 #include "internal.h"

 #include "video.h"

 
 static AVFilterBufferRef *get_video_buffer(AVFilterLink *link, int perms,
                                            int w, int h)
 {
     AVFilterBufferRef *picref =

         ff_default_get_video_buffer(link, perms, w, h);

     FFSWAP(uint8_t*, picref->data[1], picref->data[2]);
     FFSWAP(int, picref->linesize[1], picref->linesize[2]);

 
     return picref;
 }
 

 static int filter_frame(AVFilterLink *link, AVFilterBufferRef *inpicref)

 {

     FFSWAP(uint8_t*, inpicref->data[1], inpicref->data[2]);
     FFSWAP(int, inpicref->linesize[1], inpicref->linesize[2]);

     return ff_filter_frame(link->dst->outputs[0], inpicref);

 }
 
 static int query_formats(AVFilterContext *ctx)
 {

     static const enum AVPixelFormat pix_fmts[] = {
         AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVA420P,
         AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVA444P,
         AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
         AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P,
         AV_PIX_FMT_YUV411P,
         AV_PIX_FMT_NONE,

     };
 

     ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));

     return 0;
 }
 

 static const AVFilterPad swapuv_inputs[] = {
     {
         .name             = "default",
         .type             = AVMEDIA_TYPE_VIDEO,
         .get_video_buffer = get_video_buffer,

         .filter_frame     = filter_frame,

     },
     { NULL }
 };
 
 static const AVFilterPad swapuv_outputs[] = {
     {
         .name = "default",
         .type = AVMEDIA_TYPE_VIDEO,
     },
     { NULL }
 };
 

 AVFilter avfilter_vf_swapuv = {
     .name      = "swapuv",
     .description = NULL_IF_CONFIG_SMALL("Swap U and V components."),
     .priv_size = 0,
     .query_formats = query_formats,

     .inputs        = swapuv_inputs,
     .outputs       = swapuv_outputs,

 };