1 /*
2 * Copyright (c) 2015 Paul B. Mahol
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
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"
26
27 #include "avfilter.h"
28 #include "drawutils.h"
29 #include "formats.h"
30 #include "internal.h"
31 #include "framesync.h"
32 #include "video.h"
33
34 typedef struct StackItem {
35 int x[4], y[4];
36 int linesize[4];
37 int height[4];
38 } StackItem;
39
40 typedef struct StackContext {
41 const AVClass *class;
42 const AVPixFmtDescriptor *desc;
43 int nb_inputs;
44 char *layout;
45 int shortest;
46 int is_vertical;
47 int is_horizontal;
48 int nb_planes;
49 uint8_t fillcolor[4];
50 char *fillcolor_str;
51 int fillcolor_enable;
52
53 FFDrawContext draw;
54 FFDrawColor color;
55
56 StackItem *items;
57 AVFrame **frames;
58 FFFrameSync fs;
59 } StackContext;
60
query_formats(AVFilterContext * ctx)61 static int query_formats(AVFilterContext *ctx)
62 {
63 AVFilterFormats *formats = NULL;
64 StackContext *s = ctx->priv;
65 int ret;
66
67 if (s->fillcolor_enable) {
68 return ff_set_common_formats(ctx, ff_draw_supported_pixel_formats(0));
69 }
70
71 ret = ff_formats_pixdesc_filter(&formats, 0,
72 AV_PIX_FMT_FLAG_HWACCEL |
73 AV_PIX_FMT_FLAG_BITSTREAM |
74 AV_PIX_FMT_FLAG_PAL);
75 if (ret < 0)
76 return ret;
77 return ff_set_common_formats(ctx, formats);
78 }
79
init(AVFilterContext * ctx)80 static av_cold int init(AVFilterContext *ctx)
81 {
82 StackContext *s = ctx->priv;
83 int i, ret;
84
85 if (!strcmp(ctx->filter->name, "vstack"))
86 s->is_vertical = 1;
87
88 if (!strcmp(ctx->filter->name, "hstack"))
89 s->is_horizontal = 1;
90
91 s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
92 if (!s->frames)
93 return AVERROR(ENOMEM);
94
95 s->items = av_calloc(s->nb_inputs, sizeof(*s->items));
96 if (!s->items)
97 return AVERROR(ENOMEM);
98
99 if (!strcmp(ctx->filter->name, "xstack")) {
100 if (strcmp(s->fillcolor_str, "none") &&
101 av_parse_color(s->fillcolor, s->fillcolor_str, -1, ctx) >= 0) {
102 s->fillcolor_enable = 1;
103 } else {
104 s->fillcolor_enable = 0;
105 }
106 if (!s->layout) {
107 if (s->nb_inputs == 2) {
108 s->layout = av_strdup("0_0|w0_0");
109 if (!s->layout)
110 return AVERROR(ENOMEM);
111 } else {
112 av_log(ctx, AV_LOG_ERROR, "No layout specified.\n");
113 return AVERROR(EINVAL);
114 }
115 }
116 }
117
118 for (i = 0; i < s->nb_inputs; i++) {
119 AVFilterPad pad = { 0 };
120
121 pad.type = AVMEDIA_TYPE_VIDEO;
122 pad.name = av_asprintf("input%d", i);
123 if (!pad.name)
124 return AVERROR(ENOMEM);
125
126 if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) {
127 av_freep(&pad.name);
128 return ret;
129 }
130 }
131
132 return 0;
133 }
134
process_slice(AVFilterContext * ctx,void * arg,int job,int nb_jobs)135 static int process_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
136 {
137 StackContext *s = ctx->priv;
138 AVFrame *out = arg;
139 AVFrame **in = s->frames;
140 const int start = (s->nb_inputs * job ) / nb_jobs;
141 const int end = (s->nb_inputs * (job+1)) / nb_jobs;
142
143 for (int i = start; i < end; i++) {
144 StackItem *item = &s->items[i];
145
146 for (int p = 0; p < s->nb_planes; p++) {
147 av_image_copy_plane(out->data[p] + out->linesize[p] * item->y[p] + item->x[p],
148 out->linesize[p],
149 in[i]->data[p],
150 in[i]->linesize[p],
151 item->linesize[p], item->height[p]);
152 }
153 }
154
155 return 0;
156 }
157
process_frame(FFFrameSync * fs)158 static int process_frame(FFFrameSync *fs)
159 {
160 AVFilterContext *ctx = fs->parent;
161 AVFilterLink *outlink = ctx->outputs[0];
162 StackContext *s = fs->opaque;
163 AVFrame **in = s->frames;
164 AVFrame *out;
165 int i, ret;
166
167 for (i = 0; i < s->nb_inputs; i++) {
168 if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
169 return ret;
170 }
171
172 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
173 if (!out)
174 return AVERROR(ENOMEM);
175 out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
176 out->sample_aspect_ratio = outlink->sample_aspect_ratio;
177
178 if (s->fillcolor_enable)
179 ff_fill_rectangle(&s->draw, &s->color, out->data, out->linesize,
180 0, 0, outlink->w, outlink->h);
181
182 ctx->internal->execute(ctx, process_slice, out, NULL, FFMIN(s->nb_inputs, ff_filter_get_nb_threads(ctx)));
183
184 return ff_filter_frame(outlink, out);
185 }
186
config_output(AVFilterLink * outlink)187 static int config_output(AVFilterLink *outlink)
188 {
189 AVFilterContext *ctx = outlink->src;
190 StackContext *s = ctx->priv;
191 AVRational frame_rate = ctx->inputs[0]->frame_rate;
192 AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
193 int height = ctx->inputs[0]->h;
194 int width = ctx->inputs[0]->w;
195 FFFrameSyncIn *in;
196 int i, ret;
197
198 s->desc = av_pix_fmt_desc_get(outlink->format);
199 if (!s->desc)
200 return AVERROR_BUG;
201
202 if (s->is_vertical) {
203 for (i = 0; i < s->nb_inputs; i++) {
204 AVFilterLink *inlink = ctx->inputs[i];
205 StackItem *item = &s->items[i];
206
207 if (ctx->inputs[i]->w != width) {
208 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);
209 return AVERROR(EINVAL);
210 }
211
212 if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
213 return ret;
214 }
215
216 item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
217 item->height[0] = item->height[3] = inlink->h;
218
219 if (i) {
220 item->y[1] = item->y[2] = AV_CEIL_RSHIFT(height, s->desc->log2_chroma_h);
221 item->y[0] = item->y[3] = height;
222
223 height += ctx->inputs[i]->h;
224 }
225 }
226 } else if (s->is_horizontal) {
227 for (i = 0; i < s->nb_inputs; i++) {
228 AVFilterLink *inlink = ctx->inputs[i];
229 StackItem *item = &s->items[i];
230
231 if (ctx->inputs[i]->h != height) {
232 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);
233 return AVERROR(EINVAL);
234 }
235
236 if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
237 return ret;
238 }
239
240 item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
241 item->height[0] = item->height[3] = inlink->h;
242
243 if (i) {
244 if ((ret = av_image_fill_linesizes(item->x, inlink->format, width)) < 0) {
245 return ret;
246 }
247
248 width += ctx->inputs[i]->w;
249 }
250 }
251 } else {
252 char *arg, *p = s->layout, *saveptr = NULL;
253 char *arg2, *p2, *saveptr2 = NULL;
254 char *arg3, *p3, *saveptr3 = NULL;
255 int inw, inh, size;
256
257 if (s->fillcolor_enable) {
258 ff_draw_init(&s->draw, ctx->inputs[0]->format, 0);
259 ff_draw_color(&s->draw, &s->color, s->fillcolor);
260 }
261
262 for (i = 0; i < s->nb_inputs; i++) {
263 AVFilterLink *inlink = ctx->inputs[i];
264 StackItem *item = &s->items[i];
265
266 if (!(arg = av_strtok(p, "|", &saveptr)))
267 return AVERROR(EINVAL);
268
269 p = NULL;
270
271 if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
272 return ret;
273 }
274
275 item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
276 item->height[0] = item->height[3] = inlink->h;
277
278 p2 = arg;
279 inw = inh = 0;
280
281 for (int j = 0; j < 2; j++) {
282 if (!(arg2 = av_strtok(p2, "_", &saveptr2)))
283 return AVERROR(EINVAL);
284
285 p2 = NULL;
286 p3 = arg2;
287 while ((arg3 = av_strtok(p3, "+", &saveptr3))) {
288 p3 = NULL;
289 if (sscanf(arg3, "w%d", &size) == 1) {
290 if (size == i || size < 0 || size >= s->nb_inputs)
291 return AVERROR(EINVAL);
292
293 if (!j)
294 inw += ctx->inputs[size]->w;
295 else
296 inh += ctx->inputs[size]->w;
297 } else if (sscanf(arg3, "h%d", &size) == 1) {
298 if (size == i || size < 0 || size >= s->nb_inputs)
299 return AVERROR(EINVAL);
300
301 if (!j)
302 inw += ctx->inputs[size]->h;
303 else
304 inh += ctx->inputs[size]->h;
305 } else if (sscanf(arg3, "%d", &size) == 1) {
306 if (size < 0)
307 return AVERROR(EINVAL);
308
309 if (!j)
310 inw += size;
311 else
312 inh += size;
313 } else {
314 return AVERROR(EINVAL);
315 }
316 }
317 }
318
319 if ((ret = av_image_fill_linesizes(item->x, inlink->format, inw)) < 0) {
320 return ret;
321 }
322
323 item->y[1] = item->y[2] = AV_CEIL_RSHIFT(inh, s->desc->log2_chroma_h);
324 item->y[0] = item->y[3] = inh;
325
326 width = FFMAX(width, inlink->w + inw);
327 height = FFMAX(height, inlink->h + inh);
328 }
329 }
330
331 s->nb_planes = av_pix_fmt_count_planes(outlink->format);
332
333 outlink->w = width;
334 outlink->h = height;
335 outlink->frame_rate = frame_rate;
336 outlink->sample_aspect_ratio = sar;
337
338 for (i = 1; i < s->nb_inputs; i++) {
339 AVFilterLink *inlink = ctx->inputs[i];
340 if (outlink->frame_rate.num != inlink->frame_rate.num ||
341 outlink->frame_rate.den != inlink->frame_rate.den) {
342 av_log(ctx, AV_LOG_VERBOSE,
343 "Video inputs have different frame rates, output will be VFR\n");
344 outlink->frame_rate = av_make_q(1, 0);
345 break;
346 }
347 }
348
349 if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
350 return ret;
351
352 in = s->fs.in;
353 s->fs.opaque = s;
354 s->fs.on_event = process_frame;
355
356 for (i = 0; i < s->nb_inputs; i++) {
357 AVFilterLink *inlink = ctx->inputs[i];
358
359 in[i].time_base = inlink->time_base;
360 in[i].sync = 1;
361 in[i].before = EXT_STOP;
362 in[i].after = s->shortest ? EXT_STOP : EXT_INFINITY;
363 }
364
365 ret = ff_framesync_configure(&s->fs);
366 outlink->time_base = s->fs.time_base;
367
368 return ret;
369 }
370
uninit(AVFilterContext * ctx)371 static av_cold void uninit(AVFilterContext *ctx)
372 {
373 StackContext *s = ctx->priv;
374 int i;
375
376 ff_framesync_uninit(&s->fs);
377 av_freep(&s->frames);
378 av_freep(&s->items);
379
380 for (i = 0; i < ctx->nb_inputs; i++)
381 av_freep(&ctx->input_pads[i].name);
382 }
383
activate(AVFilterContext * ctx)384 static int activate(AVFilterContext *ctx)
385 {
386 StackContext *s = ctx->priv;
387 return ff_framesync_activate(&s->fs);
388 }
389
390 #define OFFSET(x) offsetof(StackContext, x)
391 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
392 static const AVOption stack_options[] = {
393 { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
394 { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
395 { NULL },
396 };
397
398 static const AVFilterPad outputs[] = {
399 {
400 .name = "default",
401 .type = AVMEDIA_TYPE_VIDEO,
402 .config_props = config_output,
403 },
404 { NULL }
405 };
406
407 #if CONFIG_HSTACK_FILTER
408
409 #define hstack_options stack_options
410 AVFILTER_DEFINE_CLASS(hstack);
411
412 AVFilter ff_vf_hstack = {
413 .name = "hstack",
414 .description = NULL_IF_CONFIG_SMALL("Stack video inputs horizontally."),
415 .priv_size = sizeof(StackContext),
416 .priv_class = &hstack_class,
417 .query_formats = query_formats,
418 .outputs = outputs,
419 .init = init,
420 .uninit = uninit,
421 .activate = activate,
422 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_SLICE_THREADS,
423 };
424
425 #endif /* CONFIG_HSTACK_FILTER */
426
427 #if CONFIG_VSTACK_FILTER
428
429 #define vstack_options stack_options
430 AVFILTER_DEFINE_CLASS(vstack);
431
432 AVFilter ff_vf_vstack = {
433 .name = "vstack",
434 .description = NULL_IF_CONFIG_SMALL("Stack video inputs vertically."),
435 .priv_size = sizeof(StackContext),
436 .priv_class = &vstack_class,
437 .query_formats = query_formats,
438 .outputs = outputs,
439 .init = init,
440 .uninit = uninit,
441 .activate = activate,
442 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_SLICE_THREADS,
443 };
444
445 #endif /* CONFIG_VSTACK_FILTER */
446
447 #if CONFIG_XSTACK_FILTER
448
449 static const AVOption xstack_options[] = {
450 { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
451 { "layout", "set custom layout", OFFSET(layout), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, .flags = FLAGS },
452 { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
453 { "fill", "set the color for unused pixels", OFFSET(fillcolor_str), AV_OPT_TYPE_STRING, {.str = "none"}, .flags = FLAGS },
454 { NULL },
455 };
456
457 AVFILTER_DEFINE_CLASS(xstack);
458
459 AVFilter ff_vf_xstack = {
460 .name = "xstack",
461 .description = NULL_IF_CONFIG_SMALL("Stack video inputs into custom layout."),
462 .priv_size = sizeof(StackContext),
463 .priv_class = &xstack_class,
464 .query_formats = query_formats,
465 .outputs = outputs,
466 .init = init,
467 .uninit = uninit,
468 .activate = activate,
469 .flags = AVFILTER_FLAG_DYNAMIC_INPUTS | AVFILTER_FLAG_SLICE_THREADS,
470 };
471
472 #endif /* CONFIG_XSTACK_FILTER */
473