2 * Copyright (c) 2015 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/avstring.h"
22 #include "libavutil/imgutils.h"
23 #include "libavutil/opt.h"
24 #include "libavutil/pixdesc.h"
29 #include "framesync.h"
32 typedef struct StackItem {
38 typedef struct StackContext {
40 const AVPixFmtDescriptor *desc;
53 static int query_formats(AVFilterContext *ctx)
55 AVFilterFormats *pix_fmts = NULL;
58 for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
59 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
60 if (!(desc->flags & AV_PIX_FMT_FLAG_PAL ||
61 desc->flags & AV_PIX_FMT_FLAG_HWACCEL ||
62 desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) &&
63 (ret = ff_add_format(&pix_fmts, fmt)) < 0)
67 return ff_set_common_formats(ctx, pix_fmts);
70 static av_cold int init(AVFilterContext *ctx)
72 StackContext *s = ctx->priv;
75 if (!strcmp(ctx->filter->name, "vstack"))
78 if (!strcmp(ctx->filter->name, "hstack"))
81 s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
83 return AVERROR(ENOMEM);
85 if (!strcmp(ctx->filter->name, "xstack")) {
86 s->items = av_calloc(s->nb_inputs, sizeof(*s->items));
88 return AVERROR(ENOMEM);
91 for (i = 0; i < s->nb_inputs; i++) {
92 AVFilterPad pad = { 0 };
94 pad.type = AVMEDIA_TYPE_VIDEO;
95 pad.name = av_asprintf("input%d", i);
97 return AVERROR(ENOMEM);
99 if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) {
108 static int process_frame(FFFrameSync *fs)
110 AVFilterContext *ctx = fs->parent;
111 AVFilterLink *outlink = ctx->outputs[0];
112 StackContext *s = fs->opaque;
113 AVFrame **in = s->frames;
115 int i, p, ret, offset[4] = { 0 };
117 for (i = 0; i < s->nb_inputs; i++) {
118 if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
122 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
124 return AVERROR(ENOMEM);
125 out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
126 out->sample_aspect_ratio = outlink->sample_aspect_ratio;
128 for (i = 0; i < s->nb_inputs; i++) {
129 AVFilterLink *inlink = ctx->inputs[i];
133 if (s->is_horizontal || s->is_vertical) {
134 if ((ret = av_image_fill_linesizes(linesize, inlink->format, inlink->w)) < 0) {
139 height[1] = height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
140 height[0] = height[3] = inlink->h;
143 for (p = 0; p < s->nb_planes; p++) {
144 if (s->is_vertical) {
145 av_image_copy_plane(out->data[p] + offset[p] * out->linesize[p],
149 linesize[p], height[p]);
150 offset[p] += height[p];
151 } else if (s->is_horizontal) {
152 av_image_copy_plane(out->data[p] + offset[p],
156 linesize[p], height[p]);
157 offset[p] += linesize[p];
159 StackItem *item = &s->items[i];
161 av_image_copy_plane(out->data[p] + out->linesize[p] * item->y[p] + item->x[p],
165 item->linesize[p], item->height[p]);
170 return ff_filter_frame(outlink, out);
173 static int config_output(AVFilterLink *outlink)
175 AVFilterContext *ctx = outlink->src;
176 StackContext *s = ctx->priv;
177 AVRational frame_rate = ctx->inputs[0]->frame_rate;
178 AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
179 int height = ctx->inputs[0]->h;
180 int width = ctx->inputs[0]->w;
184 s->desc = av_pix_fmt_desc_get(outlink->format);
188 if (s->is_vertical) {
189 for (i = 1; i < s->nb_inputs; i++) {
190 if (ctx->inputs[i]->w != width) {
191 av_log(ctx, AV_LOG_ERROR, "Input %d width %d does not match input %d width %d.\n", i, ctx->inputs[i]->w, 0, width);
192 return AVERROR(EINVAL);
194 height += ctx->inputs[i]->h;
196 } else if (s->is_horizontal) {
197 for (i = 1; i < s->nb_inputs; i++) {
198 if (ctx->inputs[i]->h != height) {
199 av_log(ctx, AV_LOG_ERROR, "Input %d height %d does not match input %d height %d.\n", i, ctx->inputs[i]->h, 0, height);
200 return AVERROR(EINVAL);
202 width += ctx->inputs[i]->w;
205 char *arg, *p = s->layout, *saveptr = NULL;
206 char *arg2, *p2, *saveptr2 = NULL;
207 char *arg3, *p3, *saveptr3 = NULL;
210 for (i = 0; i < s->nb_inputs; i++) {
211 AVFilterLink *inlink = ctx->inputs[i];
212 StackItem *item = &s->items[i];
214 if (!(arg = av_strtok(p, "|", &saveptr)))
215 return AVERROR(EINVAL);
219 if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
223 item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
224 item->height[0] = item->height[3] = inlink->h;
229 for (int j = 0; j < 2; j++) {
230 if (!(arg2 = av_strtok(p2, "_", &saveptr2)))
231 return AVERROR(EINVAL);
235 while ((arg3 = av_strtok(p3, "+", &saveptr3))) {
237 if (sscanf(arg3, "w%d", &size) == 1) {
238 if (size == i || size < 0 || size >= s->nb_inputs)
239 return AVERROR(EINVAL);
242 inw += ctx->inputs[size]->w;
244 inh += ctx->inputs[size]->w;
245 } else if (sscanf(arg3, "h%d", &size) == 1) {
246 if (size == i || size < 0 || size >= s->nb_inputs)
247 return AVERROR(EINVAL);
250 inw += ctx->inputs[size]->h;
252 inh += ctx->inputs[size]->h;
253 } else if (sscanf(arg3, "%d", &size) == 1) {
255 return AVERROR(EINVAL);
262 return AVERROR(EINVAL);
267 if ((ret = av_image_fill_linesizes(item->x, inlink->format, inw)) < 0) {
271 item->y[1] = item->y[2] = AV_CEIL_RSHIFT(inh, s->desc->log2_chroma_h);
272 item->y[0] = item->y[3] = inh;
274 width = FFMAX(width, inlink->w + inw);
275 height = FFMAX(height, inlink->h + inh);
279 s->nb_planes = av_pix_fmt_count_planes(outlink->format);
283 outlink->frame_rate = frame_rate;
284 outlink->sample_aspect_ratio = sar;
286 if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
291 s->fs.on_event = process_frame;
293 for (i = 0; i < s->nb_inputs; i++) {
294 AVFilterLink *inlink = ctx->inputs[i];
296 in[i].time_base = inlink->time_base;
298 in[i].before = EXT_STOP;
299 in[i].after = s->shortest ? EXT_STOP : EXT_INFINITY;
302 ret = ff_framesync_configure(&s->fs);
303 outlink->time_base = s->fs.time_base;
308 static av_cold void uninit(AVFilterContext *ctx)
310 StackContext *s = ctx->priv;
313 ff_framesync_uninit(&s->fs);
314 av_freep(&s->frames);
317 for (i = 0; i < ctx->nb_inputs; i++)
318 av_freep(&ctx->input_pads[i].name);
321 static int activate(AVFilterContext *ctx)
323 StackContext *s = ctx->priv;
324 return ff_framesync_activate(&s->fs);
327 #define OFFSET(x) offsetof(StackContext, x)
328 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
329 static const AVOption stack_options[] = {
330 { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
331 { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
335 static const AVFilterPad outputs[] = {
338 .type = AVMEDIA_TYPE_VIDEO,
339 .config_props = config_output,
344 #if CONFIG_HSTACK_FILTER
346 #define hstack_options stack_options
347 AVFILTER_DEFINE_CLASS(hstack);
349 AVFilter ff_vf_hstack = {
351 .description = NULL_IF_CONFIG_SMALL("Stack video inputs horizontally."),
352 .priv_size = sizeof(StackContext),
353 .priv_class = &hstack_class,
354 .query_formats = query_formats,
358 .activate = activate,
359 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
362 #endif /* CONFIG_HSTACK_FILTER */
364 #if CONFIG_VSTACK_FILTER
366 #define vstack_options stack_options
367 AVFILTER_DEFINE_CLASS(vstack);
369 AVFilter ff_vf_vstack = {
371 .description = NULL_IF_CONFIG_SMALL("Stack video inputs vertically."),
372 .priv_size = sizeof(StackContext),
373 .priv_class = &vstack_class,
374 .query_formats = query_formats,
378 .activate = activate,
379 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
382 #endif /* CONFIG_VSTACK_FILTER */
384 #if CONFIG_XSTACK_FILTER
386 static const AVOption xstack_options[] = {
387 { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
388 { "layout", "set custom layout", OFFSET(layout), AV_OPT_TYPE_STRING, {.str="0_0|w0_0"}, 0, 0, .flags = FLAGS },
389 { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
393 AVFILTER_DEFINE_CLASS(xstack);
395 AVFilter ff_vf_xstack = {
397 .description = NULL_IF_CONFIG_SMALL("Stack video inputs into custom layout."),
398 .priv_size = sizeof(StackContext),
399 .priv_class = &xstack_class,
400 .query_formats = query_formats,
404 .activate = activate,
405 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
408 #endif /* CONFIG_XSTACK_FILTER */