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/parseutils.h"
25 #include "libavutil/pixdesc.h"
28 #include "drawutils.h"
31 #include "framesync.h"
34 typedef struct StackItem {
40 typedef struct StackContext {
42 const AVPixFmtDescriptor *desc;
61 static int query_formats(AVFilterContext *ctx)
63 AVFilterFormats *pix_fmts = NULL;
64 StackContext *s = ctx->priv;
67 if (s->fillcolor_enable) {
68 return ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
71 for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
72 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
73 if (!(desc->flags & AV_PIX_FMT_FLAG_PAL ||
74 desc->flags & AV_PIX_FMT_FLAG_HWACCEL ||
75 desc->flags & AV_PIX_FMT_FLAG_BITSTREAM) &&
76 (ret = ff_add_format(&pix_fmts, fmt)) < 0)
80 return ff_set_common_formats(ctx, pix_fmts);
83 static av_cold int init(AVFilterContext *ctx)
85 StackContext *s = ctx->priv;
88 if (!strcmp(ctx->filter->name, "vstack"))
91 if (!strcmp(ctx->filter->name, "hstack"))
94 s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
96 return AVERROR(ENOMEM);
98 s->items = av_calloc(s->nb_inputs, sizeof(*s->items));
100 return AVERROR(ENOMEM);
102 if (!strcmp(ctx->filter->name, "xstack")) {
103 if (strcmp(s->fillcolor_str, "none") &&
104 av_parse_color(s->fillcolor, s->fillcolor_str, -1, ctx) >= 0) {
105 s->fillcolor_enable = 1;
107 s->fillcolor_enable = 0;
110 if (s->nb_inputs == 2) {
111 s->layout = av_strdup("0_0|w0_0");
113 return AVERROR(ENOMEM);
115 av_log(ctx, AV_LOG_ERROR, "No layout specified.\n");
116 return AVERROR(EINVAL);
121 for (i = 0; i < s->nb_inputs; i++) {
122 AVFilterPad pad = { 0 };
124 pad.type = AVMEDIA_TYPE_VIDEO;
125 pad.name = av_asprintf("input%d", i);
127 return AVERROR(ENOMEM);
129 if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) {
138 static int process_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
140 StackContext *s = ctx->priv;
142 AVFrame **in = s->frames;
143 const int start = (s->nb_inputs * job ) / nb_jobs;
144 const int end = (s->nb_inputs * (job+1)) / nb_jobs;
146 for (int i = start; i < end; i++) {
147 StackItem *item = &s->items[i];
149 for (int p = 0; p < s->nb_planes; p++) {
150 av_image_copy_plane(out->data[p] + out->linesize[p] * item->y[p] + item->x[p],
154 item->linesize[p], item->height[p]);
161 static int process_frame(FFFrameSync *fs)
163 AVFilterContext *ctx = fs->parent;
164 AVFilterLink *outlink = ctx->outputs[0];
165 StackContext *s = fs->opaque;
166 AVFrame **in = s->frames;
170 for (i = 0; i < s->nb_inputs; i++) {
171 if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
175 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
177 return AVERROR(ENOMEM);
178 out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
179 out->sample_aspect_ratio = outlink->sample_aspect_ratio;
181 if (s->fillcolor_enable)
182 ff_fill_rectangle(&s->draw, &s->color, out->data, out->linesize,
183 0, 0, outlink->w, outlink->h);
185 ctx->internal->execute(ctx, process_slice, out, NULL, FFMIN(s->nb_inputs, ff_filter_get_nb_threads(ctx)));
187 return ff_filter_frame(outlink, out);
190 static int config_output(AVFilterLink *outlink)
192 AVFilterContext *ctx = outlink->src;
193 StackContext *s = ctx->priv;
194 AVRational frame_rate = ctx->inputs[0]->frame_rate;
195 AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
196 int height = ctx->inputs[0]->h;
197 int width = ctx->inputs[0]->w;
201 s->desc = av_pix_fmt_desc_get(outlink->format);
205 if (s->is_vertical) {
206 for (i = 0; i < s->nb_inputs; i++) {
207 AVFilterLink *inlink = ctx->inputs[i];
208 StackItem *item = &s->items[i];
210 if (ctx->inputs[i]->w != width) {
211 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);
212 return AVERROR(EINVAL);
215 if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
219 item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
220 item->height[0] = item->height[3] = inlink->h;
223 item->y[1] = item->y[2] = AV_CEIL_RSHIFT(height, s->desc->log2_chroma_h);
224 item->y[0] = item->y[3] = height;
226 height += ctx->inputs[i]->h;
229 } else if (s->is_horizontal) {
230 for (i = 0; i < s->nb_inputs; i++) {
231 AVFilterLink *inlink = ctx->inputs[i];
232 StackItem *item = &s->items[i];
234 if (ctx->inputs[i]->h != height) {
235 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);
236 return AVERROR(EINVAL);
239 if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
243 item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
244 item->height[0] = item->height[3] = inlink->h;
247 if ((ret = av_image_fill_linesizes(item->x, inlink->format, width)) < 0) {
251 width += ctx->inputs[i]->w;
255 char *arg, *p = s->layout, *saveptr = NULL;
256 char *arg2, *p2, *saveptr2 = NULL;
257 char *arg3, *p3, *saveptr3 = NULL;
260 if (s->fillcolor_enable) {
261 ff_draw_init(&s->draw, ctx->inputs[0]->format, 0);
262 ff_draw_color(&s->draw, &s->color, s->fillcolor);
265 for (i = 0; i < s->nb_inputs; i++) {
266 AVFilterLink *inlink = ctx->inputs[i];
267 StackItem *item = &s->items[i];
269 if (!(arg = av_strtok(p, "|", &saveptr)))
270 return AVERROR(EINVAL);
274 if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
278 item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
279 item->height[0] = item->height[3] = inlink->h;
284 for (int j = 0; j < 2; j++) {
285 if (!(arg2 = av_strtok(p2, "_", &saveptr2)))
286 return AVERROR(EINVAL);
290 while ((arg3 = av_strtok(p3, "+", &saveptr3))) {
292 if (sscanf(arg3, "w%d", &size) == 1) {
293 if (size == i || size < 0 || size >= s->nb_inputs)
294 return AVERROR(EINVAL);
297 inw += ctx->inputs[size]->w;
299 inh += ctx->inputs[size]->w;
300 } else if (sscanf(arg3, "h%d", &size) == 1) {
301 if (size == i || size < 0 || size >= s->nb_inputs)
302 return AVERROR(EINVAL);
305 inw += ctx->inputs[size]->h;
307 inh += ctx->inputs[size]->h;
308 } else if (sscanf(arg3, "%d", &size) == 1) {
310 return AVERROR(EINVAL);
317 return AVERROR(EINVAL);
322 if ((ret = av_image_fill_linesizes(item->x, inlink->format, inw)) < 0) {
326 item->y[1] = item->y[2] = AV_CEIL_RSHIFT(inh, s->desc->log2_chroma_h);
327 item->y[0] = item->y[3] = inh;
329 width = FFMAX(width, inlink->w + inw);
330 height = FFMAX(height, inlink->h + inh);
334 s->nb_planes = av_pix_fmt_count_planes(outlink->format);
338 outlink->frame_rate = frame_rate;
339 outlink->sample_aspect_ratio = sar;
341 for (i = 1; i < s->nb_inputs; i++) {
342 AVFilterLink *inlink = ctx->inputs[i];
343 if (outlink->frame_rate.num != inlink->frame_rate.num ||
344 outlink->frame_rate.den != inlink->frame_rate.den) {
345 av_log(ctx, AV_LOG_VERBOSE,
346 "Video inputs have different frame rates, output will be VFR\n");
347 outlink->frame_rate = av_make_q(1, 0);
352 if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
357 s->fs.on_event = process_frame;
359 for (i = 0; i < s->nb_inputs; i++) {
360 AVFilterLink *inlink = ctx->inputs[i];
362 in[i].time_base = inlink->time_base;
364 in[i].before = EXT_STOP;
365 in[i].after = s->shortest ? EXT_STOP : EXT_INFINITY;
368 ret = ff_framesync_configure(&s->fs);
369 outlink->time_base = s->fs.time_base;
374 static av_cold void uninit(AVFilterContext *ctx)
376 StackContext *s = ctx->priv;
379 ff_framesync_uninit(&s->fs);
380 av_freep(&s->frames);
383 for (i = 0; i < ctx->nb_inputs; i++)
384 av_freep(&ctx->input_pads[i].name);
387 static int activate(AVFilterContext *ctx)
389 StackContext *s = ctx->priv;
390 return ff_framesync_activate(&s->fs);
393 #define OFFSET(x) offsetof(StackContext, x)
394 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
395 static const AVOption stack_options[] = {
396 { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
397 { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
401 static const AVFilterPad outputs[] = {
404 .type = AVMEDIA_TYPE_VIDEO,
405 .config_props = config_output,
410 #if CONFIG_HSTACK_FILTER
412 #define hstack_options stack_options
413 AVFILTER_DEFINE_CLASS(hstack);
415 AVFilter ff_vf_hstack = {
417 .description = NULL_IF_CONFIG_SMALL("Stack video inputs horizontally."),
418 .priv_size = sizeof(StackContext),
419 .priv_class = &hstack_class,
420 .query_formats = query_formats,
424 .activate = activate,
425 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_SLICE_THREADS,
428 #endif /* CONFIG_HSTACK_FILTER */
430 #if CONFIG_VSTACK_FILTER
432 #define vstack_options stack_options
433 AVFILTER_DEFINE_CLASS(vstack);
435 AVFilter ff_vf_vstack = {
437 .description = NULL_IF_CONFIG_SMALL("Stack video inputs vertically."),
438 .priv_size = sizeof(StackContext),
439 .priv_class = &vstack_class,
440 .query_formats = query_formats,
444 .activate = activate,
445 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_SLICE_THREADS,
448 #endif /* CONFIG_VSTACK_FILTER */
450 #if CONFIG_XSTACK_FILTER
452 static const AVOption xstack_options[] = {
453 { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
454 { "layout", "set custom layout", OFFSET(layout), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, .flags = FLAGS },
455 { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
456 { "fill", "set the color for unused pixels", OFFSET(fillcolor_str), AV_OPT_TYPE_STRING, {.str = "none"}, .flags = FLAGS },
460 AVFILTER_DEFINE_CLASS(xstack);
462 AVFilter ff_vf_xstack = {
464 .description = NULL_IF_CONFIG_SMALL("Stack video inputs into custom layout."),
465 .priv_size = sizeof(StackContext),
466 .priv_class = &xstack_class,
467 .query_formats = query_formats,
471 .activate = activate,
472 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_SLICE_THREADS,
475 #endif /* CONFIG_XSTACK_FILTER */