1/* 2 * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at> 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21/** 22 * @file 23 * swap UV filter 24 */ 25 26#include "libavutil/pixdesc.h" 27#include "avfilter.h" 28#include "formats.h" 29#include "internal.h" 30#include "video.h" 31 32static void do_swap(AVFrame *frame) 33{ 34 FFSWAP(uint8_t*, frame->data[1], frame->data[2]); 35 FFSWAP(int, frame->linesize[1], frame->linesize[2]); 36 FFSWAP(uint64_t, frame->error[1], frame->error[2]); 37 FFSWAP(AVBufferRef*, frame->buf[1], frame->buf[2]); 38} 39 40static AVFrame *get_video_buffer(AVFilterLink *link, int w, int h) 41{ 42 AVFrame *picref = ff_default_get_video_buffer(link, w, h); 43 do_swap(picref); 44 return picref; 45} 46 47static int filter_frame(AVFilterLink *link, AVFrame *inpicref) 48{ 49 do_swap(inpicref); 50 return ff_filter_frame(link->dst->outputs[0], inpicref); 51} 52 53static int is_planar_yuv(const AVPixFmtDescriptor *desc) 54{ 55 int i; 56 57 if (desc->flags & ~(AV_PIX_FMT_FLAG_BE | AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_ALPHA) || 58 desc->nb_components < 3 || 59 (desc->comp[1].depth_minus1 != desc->comp[2].depth_minus1)) 60 return 0; 61 for (i = 0; i < desc->nb_components; i++) { 62 if (desc->comp[i].offset_plus1 != 1 || 63 desc->comp[i].shift != 0 || 64 desc->comp[i].plane != i) 65 return 0; 66 } 67 68 return 1; 69} 70 71static int query_formats(AVFilterContext *ctx) 72{ 73 AVFilterFormats *formats = NULL; 74 int fmt; 75 76 for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) { 77 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt); 78 if (is_planar_yuv(desc)) 79 ff_add_format(&formats, fmt); 80 } 81 82 ff_set_common_formats(ctx, formats); 83 return 0; 84} 85 86static const AVFilterPad swapuv_inputs[] = { 87 { 88 .name = "default", 89 .type = AVMEDIA_TYPE_VIDEO, 90 .get_video_buffer = get_video_buffer, 91 .filter_frame = filter_frame, 92 }, 93 { NULL } 94}; 95 96static const AVFilterPad swapuv_outputs[] = { 97 { 98 .name = "default", 99 .type = AVMEDIA_TYPE_VIDEO, 100 }, 101 { NULL } 102}; 103 104AVFilter ff_vf_swapuv = { 105 .name = "swapuv", 106 .description = NULL_IF_CONFIG_SMALL("Swap U and V components."), 107 .query_formats = query_formats, 108 .inputs = swapuv_inputs, 109 .outputs = swapuv_outputs, 110}; 111