| /* |
| * 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, |
| }; |