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")) {
87 if (s->nb_inputs == 2) {
88 s->layout = av_strdup("0_0|w0_0");
90 return AVERROR(ENOMEM);
92 av_log(ctx, AV_LOG_ERROR, "No layout specified.\n");
93 return AVERROR(EINVAL);
97 s->items = av_calloc(s->nb_inputs, sizeof(*s->items));
99 return AVERROR(ENOMEM);
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;
126 int i, p, ret, offset[4] = { 0 };
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 AVFilterLink *inlink = ctx->inputs[i];
144 if (s->is_horizontal || s->is_vertical) {
145 if ((ret = av_image_fill_linesizes(linesize, inlink->format, inlink->w)) < 0) {
150 height[1] = height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
151 height[0] = height[3] = inlink->h;
154 for (p = 0; p < s->nb_planes; p++) {
155 if (s->is_vertical) {
156 av_image_copy_plane(out->data[p] + offset[p] * out->linesize[p],
160 linesize[p], height[p]);
161 offset[p] += height[p];
162 } else if (s->is_horizontal) {
163 av_image_copy_plane(out->data[p] + offset[p],
167 linesize[p], height[p]);
168 offset[p] += linesize[p];
170 StackItem *item = &s->items[i];
172 av_image_copy_plane(out->data[p] + out->linesize[p] * item->y[p] + item->x[p],
176 item->linesize[p], item->height[p]);
181 return ff_filter_frame(outlink, out);
184 static int config_output(AVFilterLink *outlink)
186 AVFilterContext *ctx = outlink->src;
187 StackContext *s = ctx->priv;
188 AVRational frame_rate = ctx->inputs[0]->frame_rate;
189 AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
190 int height = ctx->inputs[0]->h;
191 int width = ctx->inputs[0]->w;
195 s->desc = av_pix_fmt_desc_get(outlink->format);
199 if (s->is_vertical) {
200 for (i = 1; i < s->nb_inputs; i++) {
201 if (ctx->inputs[i]->w != width) {
202 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);
203 return AVERROR(EINVAL);
205 height += ctx->inputs[i]->h;
207 } else if (s->is_horizontal) {
208 for (i = 1; i < s->nb_inputs; i++) {
209 if (ctx->inputs[i]->h != height) {
210 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);
211 return AVERROR(EINVAL);
213 width += ctx->inputs[i]->w;
216 char *arg, *p = s->layout, *saveptr = NULL;
217 char *arg2, *p2, *saveptr2 = NULL;
218 char *arg3, *p3, *saveptr3 = NULL;
221 for (i = 0; i < s->nb_inputs; i++) {
222 AVFilterLink *inlink = ctx->inputs[i];
223 StackItem *item = &s->items[i];
225 if (!(arg = av_strtok(p, "|", &saveptr)))
226 return AVERROR(EINVAL);
230 if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
234 item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
235 item->height[0] = item->height[3] = inlink->h;
240 for (int j = 0; j < 2; j++) {
241 if (!(arg2 = av_strtok(p2, "_", &saveptr2)))
242 return AVERROR(EINVAL);
246 while ((arg3 = av_strtok(p3, "+", &saveptr3))) {
248 if (sscanf(arg3, "w%d", &size) == 1) {
249 if (size == i || size < 0 || size >= s->nb_inputs)
250 return AVERROR(EINVAL);
253 inw += ctx->inputs[size]->w;
255 inh += ctx->inputs[size]->w;
256 } else if (sscanf(arg3, "h%d", &size) == 1) {
257 if (size == i || size < 0 || size >= s->nb_inputs)
258 return AVERROR(EINVAL);
261 inw += ctx->inputs[size]->h;
263 inh += ctx->inputs[size]->h;
264 } else if (sscanf(arg3, "%d", &size) == 1) {
266 return AVERROR(EINVAL);
273 return AVERROR(EINVAL);
278 if ((ret = av_image_fill_linesizes(item->x, inlink->format, inw)) < 0) {
282 item->y[1] = item->y[2] = AV_CEIL_RSHIFT(inh, s->desc->log2_chroma_h);
283 item->y[0] = item->y[3] = inh;
285 width = FFMAX(width, inlink->w + inw);
286 height = FFMAX(height, inlink->h + inh);
290 s->nb_planes = av_pix_fmt_count_planes(outlink->format);
294 outlink->frame_rate = frame_rate;
295 outlink->sample_aspect_ratio = sar;
297 if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
302 s->fs.on_event = process_frame;
304 for (i = 0; i < s->nb_inputs; i++) {
305 AVFilterLink *inlink = ctx->inputs[i];
307 in[i].time_base = inlink->time_base;
309 in[i].before = EXT_STOP;
310 in[i].after = s->shortest ? EXT_STOP : EXT_INFINITY;
313 ret = ff_framesync_configure(&s->fs);
314 outlink->time_base = s->fs.time_base;
319 static av_cold void uninit(AVFilterContext *ctx)
321 StackContext *s = ctx->priv;
324 ff_framesync_uninit(&s->fs);
325 av_freep(&s->frames);
328 for (i = 0; i < ctx->nb_inputs; i++)
329 av_freep(&ctx->input_pads[i].name);
332 static int activate(AVFilterContext *ctx)
334 StackContext *s = ctx->priv;
335 return ff_framesync_activate(&s->fs);
338 #define OFFSET(x) offsetof(StackContext, x)
339 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
340 static const AVOption stack_options[] = {
341 { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
342 { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
346 static const AVFilterPad outputs[] = {
349 .type = AVMEDIA_TYPE_VIDEO,
350 .config_props = config_output,
355 #if CONFIG_HSTACK_FILTER
357 #define hstack_options stack_options
358 AVFILTER_DEFINE_CLASS(hstack);
360 AVFilter ff_vf_hstack = {
362 .description = NULL_IF_CONFIG_SMALL("Stack video inputs horizontally."),
363 .priv_size = sizeof(StackContext),
364 .priv_class = &hstack_class,
365 .query_formats = query_formats,
369 .activate = activate,
370 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
373 #endif /* CONFIG_HSTACK_FILTER */
375 #if CONFIG_VSTACK_FILTER
377 #define vstack_options stack_options
378 AVFILTER_DEFINE_CLASS(vstack);
380 AVFilter ff_vf_vstack = {
382 .description = NULL_IF_CONFIG_SMALL("Stack video inputs vertically."),
383 .priv_size = sizeof(StackContext),
384 .priv_class = &vstack_class,
385 .query_formats = query_formats,
389 .activate = activate,
390 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
393 #endif /* CONFIG_VSTACK_FILTER */
395 #if CONFIG_XSTACK_FILTER
397 static const AVOption xstack_options[] = {
398 { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
399 { "layout", "set custom layout", OFFSET(layout), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, .flags = FLAGS },
400 { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
404 AVFILTER_DEFINE_CLASS(xstack);
406 AVFilter ff_vf_xstack = {
408 .description = NULL_IF_CONFIG_SMALL("Stack video inputs into custom layout."),
409 .priv_size = sizeof(StackContext),
410 .priv_class = &xstack_class,
411 .query_formats = query_formats,
415 .activate = activate,
416 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
419 #endif /* CONFIG_XSTACK_FILTER */