blob: 8d62c48c4f532d7cd72920a3f0c6a075f30807ed
| 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/opt.h" |
| 27 | #include "libavutil/pixdesc.h" |
| 28 | #include "libavutil/version.h" |
| 29 | #include "avfilter.h" |
| 30 | #include "formats.h" |
| 31 | #include "internal.h" |
| 32 | #include "video.h" |
| 33 | |
| 34 | typedef struct SwapUVContext { |
| 35 | const AVClass *class; |
| 36 | } SwapUVContext; |
| 37 | |
| 38 | static const AVOption swapuv_options[] = { |
| 39 | { NULL } |
| 40 | }; |
| 41 | |
| 42 | AVFILTER_DEFINE_CLASS(swapuv); |
| 43 | |
| 44 | static void do_swap(AVFrame *frame) |
| 45 | { |
| 46 | FFSWAP(uint8_t*, frame->data[1], frame->data[2]); |
| 47 | FFSWAP(int, frame->linesize[1], frame->linesize[2]); |
| 48 | FFSWAP(AVBufferRef*, frame->buf[1], frame->buf[2]); |
| 49 | |
| 50 | #if FF_API_ERROR_FRAME |
| 51 | FF_DISABLE_DEPRECATION_WARNINGS |
| 52 | FFSWAP(uint64_t, frame->error[1], frame->error[2]); |
| 53 | FF_ENABLE_DEPRECATION_WARNINGS |
| 54 | #endif |
| 55 | } |
| 56 | |
| 57 | static AVFrame *get_video_buffer(AVFilterLink *link, int w, int h) |
| 58 | { |
| 59 | AVFrame *picref = ff_default_get_video_buffer(link, w, h); |
| 60 | do_swap(picref); |
| 61 | return picref; |
| 62 | } |
| 63 | |
| 64 | static int filter_frame(AVFilterLink *link, AVFrame *inpicref) |
| 65 | { |
| 66 | do_swap(inpicref); |
| 67 | return ff_filter_frame(link->dst->outputs[0], inpicref); |
| 68 | } |
| 69 | |
| 70 | static int is_planar_yuv(const AVPixFmtDescriptor *desc) |
| 71 | { |
| 72 | int i; |
| 73 | |
| 74 | if (desc->flags & ~(AV_PIX_FMT_FLAG_BE | AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_ALPHA) || |
| 75 | desc->nb_components < 3 || |
| 76 | (desc->comp[1].depth != desc->comp[2].depth)) |
| 77 | return 0; |
| 78 | for (i = 0; i < desc->nb_components; i++) { |
| 79 | if (desc->comp[i].offset != 0 || |
| 80 | desc->comp[i].shift != 0 || |
| 81 | desc->comp[i].plane != i) |
| 82 | return 0; |
| 83 | } |
| 84 | |
| 85 | return 1; |
| 86 | } |
| 87 | |
| 88 | static int query_formats(AVFilterContext *ctx) |
| 89 | { |
| 90 | AVFilterFormats *formats = NULL; |
| 91 | int fmt, ret; |
| 92 | |
| 93 | for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) { |
| 94 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt); |
| 95 | if (is_planar_yuv(desc) && (ret = ff_add_format(&formats, fmt)) < 0) |
| 96 | return ret; |
| 97 | } |
| 98 | |
| 99 | return ff_set_common_formats(ctx, formats); |
| 100 | } |
| 101 | |
| 102 | static const AVFilterPad swapuv_inputs[] = { |
| 103 | { |
| 104 | .name = "default", |
| 105 | .type = AVMEDIA_TYPE_VIDEO, |
| 106 | .get_video_buffer = get_video_buffer, |
| 107 | .filter_frame = filter_frame, |
| 108 | }, |
| 109 | { NULL } |
| 110 | }; |
| 111 | |
| 112 | static const AVFilterPad swapuv_outputs[] = { |
| 113 | { |
| 114 | .name = "default", |
| 115 | .type = AVMEDIA_TYPE_VIDEO, |
| 116 | }, |
| 117 | { NULL } |
| 118 | }; |
| 119 | |
| 120 | AVFilter ff_vf_swapuv = { |
| 121 | .name = "swapuv", |
| 122 | .description = NULL_IF_CONFIG_SMALL("Swap U and V components."), |
| 123 | .query_formats = query_formats, |
| 124 | .priv_size = sizeof(SwapUVContext), |
| 125 | .priv_class = &swapuv_class, |
| 126 | .inputs = swapuv_inputs, |
| 127 | .outputs = swapuv_outputs, |
| 128 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
| 129 | }; |
| 130 |