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 s->items = av_calloc(s->nb_inputs, sizeof(*s->items));
87 return AVERROR(ENOMEM);
89 if (!strcmp(ctx->filter->name, "xstack")) {
91 if (s->nb_inputs == 2) {
92 s->layout = av_strdup("0_0|w0_0");
94 return AVERROR(ENOMEM);
96 av_log(ctx, AV_LOG_ERROR, "No layout specified.\n");
97 return AVERROR(EINVAL);
102 for (i = 0; i < s->nb_inputs; i++) {
103 AVFilterPad pad = { 0 };
105 pad.type = AVMEDIA_TYPE_VIDEO;
106 pad.name = av_asprintf("input%d", i);
108 return AVERROR(ENOMEM);
110 if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) {
119 static int process_frame(FFFrameSync *fs)
121 AVFilterContext *ctx = fs->parent;
122 AVFilterLink *outlink = ctx->outputs[0];
123 StackContext *s = fs->opaque;
124 AVFrame **in = s->frames;
128 for (i = 0; i < s->nb_inputs; i++) {
129 if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
133 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
135 return AVERROR(ENOMEM);
136 out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
137 out->sample_aspect_ratio = outlink->sample_aspect_ratio;
139 for (i = 0; i < s->nb_inputs; i++) {
140 StackItem *item = &s->items[i];
142 for (p = 0; p < s->nb_planes; p++) {
143 av_image_copy_plane(out->data[p] + out->linesize[p] * item->y[p] + item->x[p],
147 item->linesize[p], item->height[p]);
151 return ff_filter_frame(outlink, out);
154 static int config_output(AVFilterLink *outlink)
156 AVFilterContext *ctx = outlink->src;
157 StackContext *s = ctx->priv;
158 AVRational frame_rate = ctx->inputs[0]->frame_rate;
159 AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
160 int height = ctx->inputs[0]->h;
161 int width = ctx->inputs[0]->w;
165 s->desc = av_pix_fmt_desc_get(outlink->format);
169 if (s->is_vertical) {
170 for (i = 0; i < s->nb_inputs; i++) {
171 AVFilterLink *inlink = ctx->inputs[i];
172 StackItem *item = &s->items[i];
174 if (ctx->inputs[i]->w != width) {
175 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);
176 return AVERROR(EINVAL);
179 if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
183 item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
184 item->height[0] = item->height[3] = inlink->h;
187 item->y[1] = item->y[2] = AV_CEIL_RSHIFT(height, s->desc->log2_chroma_h);
188 item->y[0] = item->y[3] = height;
190 height += ctx->inputs[i]->h;
193 } else if (s->is_horizontal) {
194 for (i = 0; i < s->nb_inputs; i++) {
195 AVFilterLink *inlink = ctx->inputs[i];
196 StackItem *item = &s->items[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);
203 if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
207 item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
208 item->height[0] = item->height[3] = inlink->h;
211 if ((ret = av_image_fill_linesizes(item->x, inlink->format, width)) < 0) {
215 width += ctx->inputs[i]->w;
219 char *arg, *p = s->layout, *saveptr = NULL;
220 char *arg2, *p2, *saveptr2 = NULL;
221 char *arg3, *p3, *saveptr3 = NULL;
224 for (i = 0; i < s->nb_inputs; i++) {
225 AVFilterLink *inlink = ctx->inputs[i];
226 StackItem *item = &s->items[i];
228 if (!(arg = av_strtok(p, "|", &saveptr)))
229 return AVERROR(EINVAL);
233 if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
237 item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
238 item->height[0] = item->height[3] = inlink->h;
243 for (int j = 0; j < 2; j++) {
244 if (!(arg2 = av_strtok(p2, "_", &saveptr2)))
245 return AVERROR(EINVAL);
249 while ((arg3 = av_strtok(p3, "+", &saveptr3))) {
251 if (sscanf(arg3, "w%d", &size) == 1) {
252 if (size == i || size < 0 || size >= s->nb_inputs)
253 return AVERROR(EINVAL);
256 inw += ctx->inputs[size]->w;
258 inh += ctx->inputs[size]->w;
259 } else if (sscanf(arg3, "h%d", &size) == 1) {
260 if (size == i || size < 0 || size >= s->nb_inputs)
261 return AVERROR(EINVAL);
264 inw += ctx->inputs[size]->h;
266 inh += ctx->inputs[size]->h;
267 } else if (sscanf(arg3, "%d", &size) == 1) {
269 return AVERROR(EINVAL);
276 return AVERROR(EINVAL);
281 if ((ret = av_image_fill_linesizes(item->x, inlink->format, inw)) < 0) {
285 item->y[1] = item->y[2] = AV_CEIL_RSHIFT(inh, s->desc->log2_chroma_h);
286 item->y[0] = item->y[3] = inh;
288 width = FFMAX(width, inlink->w + inw);
289 height = FFMAX(height, inlink->h + inh);
293 s->nb_planes = av_pix_fmt_count_planes(outlink->format);
297 outlink->frame_rate = frame_rate;
298 outlink->sample_aspect_ratio = sar;
300 if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
305 s->fs.on_event = process_frame;
307 for (i = 0; i < s->nb_inputs; i++) {
308 AVFilterLink *inlink = ctx->inputs[i];
310 in[i].time_base = inlink->time_base;
312 in[i].before = EXT_STOP;
313 in[i].after = s->shortest ? EXT_STOP : EXT_INFINITY;
316 ret = ff_framesync_configure(&s->fs);
317 outlink->time_base = s->fs.time_base;
322 static av_cold void uninit(AVFilterContext *ctx)
324 StackContext *s = ctx->priv;
327 ff_framesync_uninit(&s->fs);
328 av_freep(&s->frames);
331 for (i = 0; i < ctx->nb_inputs; i++)
332 av_freep(&ctx->input_pads[i].name);
335 static int activate(AVFilterContext *ctx)
337 StackContext *s = ctx->priv;
338 return ff_framesync_activate(&s->fs);
341 #define OFFSET(x) offsetof(StackContext, x)
342 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
343 static const AVOption stack_options[] = {
344 { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
345 { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
349 static const AVFilterPad outputs[] = {
352 .type = AVMEDIA_TYPE_VIDEO,
353 .config_props = config_output,
358 #if CONFIG_HSTACK_FILTER
360 #define hstack_options stack_options
361 AVFILTER_DEFINE_CLASS(hstack);
363 AVFilter ff_vf_hstack = {
365 .description = NULL_IF_CONFIG_SMALL("Stack video inputs horizontally."),
366 .priv_size = sizeof(StackContext),
367 .priv_class = &hstack_class,
368 .query_formats = query_formats,
372 .activate = activate,
373 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
376 #endif /* CONFIG_HSTACK_FILTER */
378 #if CONFIG_VSTACK_FILTER
380 #define vstack_options stack_options
381 AVFILTER_DEFINE_CLASS(vstack);
383 AVFilter ff_vf_vstack = {
385 .description = NULL_IF_CONFIG_SMALL("Stack video inputs vertically."),
386 .priv_size = sizeof(StackContext),
387 .priv_class = &vstack_class,
388 .query_formats = query_formats,
392 .activate = activate,
393 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
396 #endif /* CONFIG_VSTACK_FILTER */
398 #if CONFIG_XSTACK_FILTER
400 static const AVOption xstack_options[] = {
401 { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
402 { "layout", "set custom layout", OFFSET(layout), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, .flags = FLAGS },
403 { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
407 AVFILTER_DEFINE_CLASS(xstack);
409 AVFilter ff_vf_xstack = {
411 .description = NULL_IF_CONFIG_SMALL("Stack video inputs into custom layout."),
412 .priv_size = sizeof(StackContext),
413 .priv_class = &xstack_class,
414 .query_formats = query_formats,
418 .activate = activate,
419 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
422 #endif /* CONFIG_XSTACK_FILTER */