2 * Copyright (c) 2013 Paul B Mahol
4 * This file is part of FFmpeg.
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.
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.
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
21 #include "libavutil/imgutils.h"
22 #include "libavutil/opt.h"
23 #include "libavutil/pixdesc.h"
27 typedef struct WeaveContext {
38 #define OFFSET(x) offsetof(WeaveContext, x)
39 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
41 static const AVOption weave_options[] = {
42 { "first_field", "set first field", OFFSET(first_field), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "field"},
43 { "top", "set top field first", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "field"},
44 { "t", "set top field first", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "field"},
45 { "bottom", "set bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "field"},
46 { "b", "set bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "field"},
50 AVFILTER_DEFINE_CLASS(weave);
52 static int query_formats(AVFilterContext *ctx)
54 AVFilterFormats *formats = NULL;
57 ret = ff_formats_pixdesc_filter(&formats, 0,
59 AV_PIX_FMT_FLAG_HWACCEL);
62 return ff_set_common_formats(ctx, formats);
65 static int config_props_output(AVFilterLink *outlink)
67 AVFilterContext *ctx = outlink->src;
68 WeaveContext *s = ctx->priv;
69 AVFilterLink *inlink = ctx->inputs[0];
70 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
73 if (!s->double_weave) {
74 outlink->time_base.num = inlink->time_base.num * 2;
75 outlink->time_base.den = inlink->time_base.den;
76 outlink->frame_rate.num = inlink->frame_rate.num;
77 outlink->frame_rate.den = inlink->frame_rate.den * 2;
79 outlink->w = inlink->w;
80 outlink->h = inlink->h * 2;
82 if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
85 s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
86 s->planeheight[0] = s->planeheight[3] = inlink->h;
88 s->nb_planes = av_pix_fmt_count_planes(inlink->format);
93 typedef struct ThreadData {
97 static int weave_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
99 AVFilterLink *inlink = ctx->inputs[0];
100 WeaveContext *s = ctx->priv;
101 ThreadData *td = arg;
102 AVFrame *in = td->in;
103 AVFrame *out = td->out;
105 const int weave = (s->double_weave && !(inlink->frame_count_out & 1));
106 const int field1 = weave ? s->first_field : (!s->first_field);
107 const int field2 = weave ? (!s->first_field) : s->first_field;
109 for (int i = 0; i < s->nb_planes; i++) {
110 const int height = s->planeheight[i];
111 const int start = (height * jobnr) / nb_jobs;
112 const int end = (height * (jobnr+1)) / nb_jobs;
114 av_image_copy_plane(out->data[i] + out->linesize[i] * field1 +
115 out->linesize[i] * start * 2,
116 out->linesize[i] * 2,
117 in->data[i] + start * in->linesize[i],
119 s->linesize[i], end - start);
120 av_image_copy_plane(out->data[i] + out->linesize[i] * field2 +
121 out->linesize[i] * start * 2,
122 out->linesize[i] * 2,
123 s->prev->data[i] + start * s->prev->linesize[i],
124 s->prev->linesize[i],
125 s->linesize[i], end - start);
131 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
133 AVFilterContext *ctx = inlink->dst;
134 WeaveContext *s = ctx->priv;
135 AVFilterLink *outlink = ctx->outputs[0];
144 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
147 av_frame_free(&s->prev);
148 return AVERROR(ENOMEM);
150 av_frame_copy_props(out, in);
152 td.out = out, td.in = in;
153 ctx->internal->execute(ctx, weave_slice, &td, NULL, FFMIN(s->planeheight[1],
154 ff_filter_get_nb_threads(ctx)));
156 out->pts = s->double_weave ? s->prev->pts : in->pts / 2;
157 out->interlaced_frame = 1;
158 out->top_field_first = !s->first_field;
160 if (!s->double_weave)
162 av_frame_free(&s->prev);
165 return ff_filter_frame(outlink, out);
168 static av_cold void uninit(AVFilterContext *ctx)
170 WeaveContext *s = ctx->priv;
172 av_frame_free(&s->prev);
175 static const AVFilterPad weave_inputs[] = {
178 .type = AVMEDIA_TYPE_VIDEO,
179 .filter_frame = filter_frame,
184 static const AVFilterPad weave_outputs[] = {
187 .type = AVMEDIA_TYPE_VIDEO,
188 .config_props = config_props_output,
193 const AVFilter ff_vf_weave = {
195 .description = NULL_IF_CONFIG_SMALL("Weave input video fields into frames."),
196 .priv_size = sizeof(WeaveContext),
197 .priv_class = &weave_class,
198 .query_formats = query_formats,
200 .inputs = weave_inputs,
201 .outputs = weave_outputs,
202 .flags = AVFILTER_FLAG_SLICE_THREADS,
205 static av_cold int init(AVFilterContext *ctx)
207 WeaveContext *s = ctx->priv;
209 if (!strcmp(ctx->filter->name, "doubleweave"))
215 #define doubleweave_options weave_options
216 AVFILTER_DEFINE_CLASS(doubleweave);
218 const AVFilter ff_vf_doubleweave = {
219 .name = "doubleweave",
220 .description = NULL_IF_CONFIG_SMALL("Weave input video fields into double number of frames."),
221 .priv_size = sizeof(WeaveContext),
222 .priv_class = &doubleweave_class,
223 .query_formats = query_formats,
226 .inputs = weave_inputs,
227 .outputs = weave_outputs,
228 .flags = AVFILTER_FLAG_SLICE_THREADS,