/* * 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 "libavutil/opt.h" #include "libavutil/pixdesc.h" #include "libavutil/version.h" #include "avfilter.h" #include "formats.h" #include "internal.h" #include "video.h" typedef struct SwapUVContext { const AVClass *class; } SwapUVContext; static const AVOption swapuv_options[] = { { NULL } }; AVFILTER_DEFINE_CLASS(swapuv); static void do_swap(AVFrame *frame) { FFSWAP(uint8_t*, frame->data[1], frame->data[2]); FFSWAP(int, frame->linesize[1], frame->linesize[2]); FFSWAP(AVBufferRef*, frame->buf[1], frame->buf[2]); #if FF_API_ERROR_FRAME FF_DISABLE_DEPRECATION_WARNINGS FFSWAP(uint64_t, frame->error[1], frame->error[2]); FF_ENABLE_DEPRECATION_WARNINGS #endif } static AVFrame *get_video_buffer(AVFilterLink *link, int w, int h) { AVFrame *picref = ff_default_get_video_buffer(link, w, h); do_swap(picref); return picref; } static int filter_frame(AVFilterLink *link, AVFrame *inpicref) { do_swap(inpicref); return ff_filter_frame(link->dst->outputs[0], inpicref); } static int is_planar_yuv(const AVPixFmtDescriptor *desc) { int i; if (desc->flags & ~(AV_PIX_FMT_FLAG_BE | AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_ALPHA) || desc->nb_components < 3 || (desc->comp[1].depth != desc->comp[2].depth)) return 0; for (i = 0; i < desc->nb_components; i++) { if (desc->comp[i].offset != 0 || desc->comp[i].shift != 0 || desc->comp[i].plane != i) return 0; } return 1; } static int query_formats(AVFilterContext *ctx) { AVFilterFormats *formats = NULL; int fmt, ret; for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) { const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt); if (is_planar_yuv(desc) && (ret = ff_add_format(&formats, fmt)) < 0) return ret; } return ff_set_common_formats(ctx, formats); } 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 ff_vf_swapuv = { .name = "swapuv", .description = NULL_IF_CONFIG_SMALL("Swap U and V components."), .query_formats = query_formats, .priv_size = sizeof(SwapUVContext), .priv_class = &swapuv_class, .inputs = swapuv_inputs, .outputs = swapuv_outputs, .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, };