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| Rev | Author | Line No. | Line |
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| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 2010 Bobby Bingham |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | /** |
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| 22 | * @file |
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| 23 | * aspect ratio modification video filters |
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| 24 | */ |
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| 25 | |||
| 26 | #include |
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| 27 | |||
| 28 | #include "libavutil/common.h" |
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| 29 | #include "libavutil/eval.h" |
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| 30 | #include "libavutil/mathematics.h" |
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| 31 | #include "libavutil/opt.h" |
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| 32 | #include "libavutil/parseutils.h" |
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| 33 | |||
| 34 | #include "avfilter.h" |
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| 35 | #include "internal.h" |
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| 36 | #include "video.h" |
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| 37 | |||
| 38 | typedef struct { |
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| 39 | const AVClass *class; |
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| 40 | AVRational dar; |
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| 41 | AVRational sar; |
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| 42 | int max; |
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| 43 | #if FF_API_OLD_FILTER_OPTS |
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| 44 | float aspect_den; |
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| 45 | #endif |
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| 46 | char *ratio_str; |
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| 47 | } AspectContext; |
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| 48 | |||
| 49 | static av_cold int init(AVFilterContext *ctx) |
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| 50 | { |
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| 51 | AspectContext *s = ctx->priv; |
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| 52 | int ret; |
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| 53 | |||
| 54 | #if FF_API_OLD_FILTER_OPTS |
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| 55 | if (s->ratio_str && s->aspect_den > 0) { |
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| 56 | double num; |
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| 57 | av_log(ctx, AV_LOG_WARNING, |
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| 58 | "num:den syntax is deprecated, please use num/den or named options instead\n"); |
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| 59 | ret = av_expr_parse_and_eval(&num, s->ratio_str, NULL, NULL, |
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| 60 | NULL, NULL, NULL, NULL, NULL, 0, ctx); |
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| 61 | if (ret < 0) { |
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| 62 | av_log(ctx, AV_LOG_ERROR, "Unable to parse ratio numerator \"%s\"\n", s->ratio_str); |
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| 63 | return AVERROR(EINVAL); |
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| 64 | } |
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| 65 | s->sar = s->dar = av_d2q(num / s->aspect_den, s->max); |
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| 66 | } else |
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| 67 | #endif |
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| 68 | if (s->ratio_str) { |
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| 69 | ret = av_parse_ratio(&s->sar, s->ratio_str, s->max, 0, ctx); |
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| 70 | if (ret < 0 || s->sar.num < 0 || s->sar.den <= 0) { |
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| 71 | av_log(ctx, AV_LOG_ERROR, |
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| 72 | "Invalid string '%s' for aspect ratio\n", s->ratio_str); |
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| 73 | return AVERROR(EINVAL); |
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| 74 | } |
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| 75 | s->dar = s->sar; |
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| 76 | } |
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| 77 | return 0; |
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| 78 | } |
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| 79 | |||
| 80 | static int filter_frame(AVFilterLink *link, AVFrame *frame) |
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| 81 | { |
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| 82 | AspectContext *s = link->dst->priv; |
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| 83 | |||
| 84 | frame->sample_aspect_ratio = s->sar; |
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| 85 | return ff_filter_frame(link->dst->outputs[0], frame); |
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| 86 | } |
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| 87 | |||
| 88 | #define OFFSET(x) offsetof(AspectContext, x) |
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| 89 | #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
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| 90 | |||
| 91 | static inline void compute_dar(AVRational *dar, AVRational sar, int w, int h) |
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| 92 | { |
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| 93 | if (sar.num && sar.den) { |
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| 94 | av_reduce(&dar->num, &dar->den, sar.num * w, sar.den * h, INT_MAX); |
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| 95 | } else { |
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| 96 | av_reduce(&dar->num, &dar->den, w, h, INT_MAX); |
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| 97 | } |
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| 98 | } |
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| 99 | |||
| 100 | #if CONFIG_SETDAR_FILTER |
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| 101 | |||
| 102 | static int setdar_config_props(AVFilterLink *inlink) |
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| 103 | { |
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| 104 | AspectContext *s = inlink->dst->priv; |
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| 105 | AVRational dar; |
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| 106 | AVRational old_dar; |
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| 107 | AVRational old_sar = inlink->sample_aspect_ratio; |
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| 108 | |||
| 109 | if (s->dar.num && s->dar.den) { |
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| 110 | av_reduce(&s->sar.num, &s->sar.den, |
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| 111 | s->dar.num * inlink->h, |
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| 112 | s->dar.den * inlink->w, INT_MAX); |
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| 113 | inlink->sample_aspect_ratio = s->sar; |
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| 114 | dar = s->dar; |
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| 115 | } else { |
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| 116 | inlink->sample_aspect_ratio = (AVRational){ 1, 1 }; |
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| 117 | dar = (AVRational){ inlink->w, inlink->h }; |
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| 118 | } |
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| 119 | |||
| 120 | compute_dar(&old_dar, old_sar, inlink->w, inlink->h); |
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| 121 | av_log(inlink->dst, AV_LOG_VERBOSE, "w:%d h:%d dar:%d/%d sar:%d/%d -> dar:%d/%d sar:%d/%d\n", |
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| 122 | inlink->w, inlink->h, old_dar.num, old_dar.den, old_sar.num, old_sar.den, |
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| 123 | dar.num, dar.den, inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den); |
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| 124 | |||
| 125 | return 0; |
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| 126 | } |
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| 127 | |||
| 128 | static const AVOption setdar_options[] = { |
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| 129 | { "dar", "set display aspect ratio", OFFSET(ratio_str), AV_OPT_TYPE_STRING, {.str="0"}, .flags=FLAGS }, |
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| 130 | { "ratio", "set display aspect ratio", OFFSET(ratio_str), AV_OPT_TYPE_STRING, {.str="0"}, .flags=FLAGS }, |
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| 131 | { "r", "set display aspect ratio", OFFSET(ratio_str), AV_OPT_TYPE_STRING, {.str="0"}, .flags=FLAGS }, |
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| 132 | #if FF_API_OLD_FILTER_OPTS |
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| 133 | { "dar_den", NULL, OFFSET(aspect_den), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, 0, FLT_MAX, FLAGS }, |
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| 134 | #endif |
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| 135 | { "max", "set max value for nominator or denominator in the ratio", OFFSET(max), AV_OPT_TYPE_INT, {.i64=100}, 1, INT_MAX, FLAGS }, |
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| 136 | { NULL } |
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| 137 | }; |
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| 138 | |||
| 139 | AVFILTER_DEFINE_CLASS(setdar); |
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| 140 | |||
| 141 | static const AVFilterPad avfilter_vf_setdar_inputs[] = { |
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| 142 | { |
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| 143 | .name = "default", |
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| 144 | .type = AVMEDIA_TYPE_VIDEO, |
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| 145 | .config_props = setdar_config_props, |
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| 146 | .filter_frame = filter_frame, |
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| 147 | }, |
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| 148 | { NULL } |
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| 149 | }; |
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| 150 | |||
| 151 | static const AVFilterPad avfilter_vf_setdar_outputs[] = { |
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| 152 | { |
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| 153 | .name = "default", |
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| 154 | .type = AVMEDIA_TYPE_VIDEO, |
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| 155 | }, |
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| 156 | { NULL } |
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| 157 | }; |
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| 158 | |||
| 159 | AVFilter avfilter_vf_setdar = { |
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| 160 | .name = "setdar", |
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| 161 | .description = NULL_IF_CONFIG_SMALL("Set the frame display aspect ratio."), |
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| 162 | .init = init, |
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| 163 | .priv_size = sizeof(AspectContext), |
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| 164 | .priv_class = &setdar_class, |
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| 165 | .inputs = avfilter_vf_setdar_inputs, |
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| 166 | .outputs = avfilter_vf_setdar_outputs, |
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| 167 | }; |
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| 168 | |||
| 169 | #endif /* CONFIG_SETDAR_FILTER */ |
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| 170 | |||
| 171 | #if CONFIG_SETSAR_FILTER |
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| 172 | |||
| 173 | static int setsar_config_props(AVFilterLink *inlink) |
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| 174 | { |
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| 175 | AspectContext *s = inlink->dst->priv; |
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| 176 | AVRational old_sar = inlink->sample_aspect_ratio; |
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| 177 | AVRational old_dar, dar; |
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| 178 | |||
| 179 | inlink->sample_aspect_ratio = s->sar; |
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| 180 | |||
| 181 | compute_dar(&old_dar, old_sar, inlink->w, inlink->h); |
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| 182 | compute_dar(&dar, s->sar, inlink->w, inlink->h); |
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| 183 | av_log(inlink->dst, AV_LOG_VERBOSE, "w:%d h:%d sar:%d/%d dar:%d/%d -> sar:%d/%d dar:%d/%d\n", |
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| 184 | inlink->w, inlink->h, old_sar.num, old_sar.den, old_dar.num, old_dar.den, |
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| 185 | inlink->sample_aspect_ratio.num, inlink->sample_aspect_ratio.den, dar.num, dar.den); |
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| 186 | |||
| 187 | return 0; |
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| 188 | } |
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| 189 | |||
| 190 | static const AVOption setsar_options[] = { |
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| 191 | { "sar", "set sample (pixel) aspect ratio", OFFSET(ratio_str), AV_OPT_TYPE_STRING, {.str="0"}, .flags=FLAGS }, |
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| 192 | { "ratio", "set sample (pixel) aspect ratio", OFFSET(ratio_str), AV_OPT_TYPE_STRING, {.str="0"}, .flags=FLAGS }, |
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| 193 | { "r", "set sample (pixel) aspect ratio", OFFSET(ratio_str), AV_OPT_TYPE_STRING, {.str="0"}, .flags=FLAGS }, |
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| 194 | #if FF_API_OLD_FILTER_OPTS |
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| 195 | { "sar_den", NULL, OFFSET(aspect_den), AV_OPT_TYPE_FLOAT, { .dbl = 0 }, 0, FLT_MAX, FLAGS }, |
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| 196 | #endif |
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| 197 | { "max", "set max value for nominator or denominator in the ratio", OFFSET(max), AV_OPT_TYPE_INT, {.i64=100}, 1, INT_MAX, FLAGS }, |
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| 198 | { NULL } |
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| 199 | }; |
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| 200 | |||
| 201 | AVFILTER_DEFINE_CLASS(setsar); |
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| 202 | |||
| 203 | static const AVFilterPad avfilter_vf_setsar_inputs[] = { |
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| 204 | { |
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| 205 | .name = "default", |
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| 206 | .type = AVMEDIA_TYPE_VIDEO, |
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| 207 | .config_props = setsar_config_props, |
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| 208 | .filter_frame = filter_frame, |
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| 209 | }, |
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| 210 | { NULL } |
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| 211 | }; |
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| 212 | |||
| 213 | static const AVFilterPad avfilter_vf_setsar_outputs[] = { |
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| 214 | { |
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| 215 | .name = "default", |
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| 216 | .type = AVMEDIA_TYPE_VIDEO, |
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| 217 | }, |
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| 218 | { NULL } |
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| 219 | }; |
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| 220 | |||
| 221 | AVFilter avfilter_vf_setsar = { |
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| 222 | .name = "setsar", |
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| 223 | .description = NULL_IF_CONFIG_SMALL("Set the pixel sample aspect ratio."), |
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| 224 | .init = init, |
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| 225 | .priv_size = sizeof(AspectContext), |
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| 226 | .priv_class = &setsar_class, |
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| 227 | .inputs = avfilter_vf_setsar_inputs, |
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| 228 | .outputs = avfilter_vf_setsar_outputs, |
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| 229 | }; |
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| 230 | |||
| 231 | #endif /* CONFIG_SETSAR_FILTER */ |