FFmpeg
vf_stack.c
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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 "config_components.h"
22 
23 #include "libavutil/avstring.h"
24 #include "libavutil/imgutils.h"
25 #include "libavutil/opt.h"
26 #include "libavutil/parseutils.h"
27 #include "libavutil/pixdesc.h"
28 
29 #include "avfilter.h"
30 #include "drawutils.h"
31 #include "formats.h"
32 #include "internal.h"
33 #include "framesync.h"
34 #include "video.h"
35 
36 typedef struct StackItem {
37  int x[4], y[4];
38  int linesize[4];
39  int height[4];
40 } StackItem;
41 
42 typedef struct StackContext {
43  const AVClass *class;
45  int nb_inputs;
46  char *layout;
47  int shortest;
50  int nb_planes;
53  uint8_t fillcolor[4];
56 
59 
63 } StackContext;
64 
66 {
67  StackContext *s = ctx->priv;
68  int reject_flags = AV_PIX_FMT_FLAG_BITSTREAM |
71 
72  if (s->fillcolor_enable) {
74  }
75 
76  return ff_set_common_formats(ctx, ff_formats_pixdesc_filter(0, reject_flags));
77 }
78 
80 {
81  StackContext *s = ctx->priv;
82  int i, ret;
83 
84  if (!strcmp(ctx->filter->name, "vstack"))
85  s->is_vertical = 1;
86 
87  if (!strcmp(ctx->filter->name, "hstack"))
88  s->is_horizontal = 1;
89 
90  if (!strcmp(ctx->filter->name, "xstack")) {
91  int is_grid;
92  if (strcmp(s->fillcolor_str, "none") &&
93  av_parse_color(s->fillcolor, s->fillcolor_str, -1, ctx) >= 0) {
94  s->fillcolor_enable = 1;
95  } else {
96  s->fillcolor_enable = 0;
97  }
98  is_grid = s->nb_grid_rows && s->nb_grid_columns;
99  if (s->layout && is_grid) {
100  av_log(ctx, AV_LOG_ERROR, "Both layout and grid were specified. Only one is allowed.\n");
101  return AVERROR(EINVAL);
102  }
103  if (!s->layout && !is_grid) {
104  if (s->nb_inputs == 2) {
105  s->nb_grid_rows = 1;
106  s->nb_grid_columns = 2;
107  is_grid = 1;
108  } else {
109  av_log(ctx, AV_LOG_ERROR, "No layout or grid specified.\n");
110  return AVERROR(EINVAL);
111  }
112  }
113 
114  if (is_grid)
115  s->nb_inputs = s->nb_grid_rows * s->nb_grid_columns;
116  }
117 
118  s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
119  if (!s->frames)
120  return AVERROR(ENOMEM);
121 
122  s->items = av_calloc(s->nb_inputs, sizeof(*s->items));
123  if (!s->items)
124  return AVERROR(ENOMEM);
125 
126  for (i = 0; i < s->nb_inputs; i++) {
127  AVFilterPad pad = { 0 };
128 
129  pad.type = AVMEDIA_TYPE_VIDEO;
130  pad.name = av_asprintf("input%d", i);
131  if (!pad.name)
132  return AVERROR(ENOMEM);
133 
134  if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
135  return ret;
136  }
137 
138  return 0;
139 }
140 
141 static int process_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
142 {
143  StackContext *s = ctx->priv;
144  AVFrame *out = arg;
145  AVFrame **in = s->frames;
146  const int start = (s->nb_inputs * job ) / nb_jobs;
147  const int end = (s->nb_inputs * (job+1)) / nb_jobs;
148 
149  for (int i = start; i < end; i++) {
150  StackItem *item = &s->items[i];
151 
152  for (int p = 0; p < s->nb_planes; p++) {
153  av_image_copy_plane(out->data[p] + out->linesize[p] * item->y[p] + item->x[p],
154  out->linesize[p],
155  in[i]->data[p],
156  in[i]->linesize[p],
157  item->linesize[p], item->height[p]);
158  }
159  }
160 
161  return 0;
162 }
163 
165 {
166  AVFilterContext *ctx = fs->parent;
167  AVFilterLink *outlink = ctx->outputs[0];
168  StackContext *s = fs->opaque;
169  AVFrame **in = s->frames;
170  AVFrame *out;
171  int i, ret;
172 
173  for (i = 0; i < s->nb_inputs; i++) {
174  if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
175  return ret;
176  }
177 
178  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
179  if (!out)
180  return AVERROR(ENOMEM);
181  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
182  out->sample_aspect_ratio = outlink->sample_aspect_ratio;
183 
184  if (s->fillcolor_enable)
185  ff_fill_rectangle(&s->draw, &s->color, out->data, out->linesize,
186  0, 0, outlink->w, outlink->h);
187 
189  FFMIN(s->nb_inputs, ff_filter_get_nb_threads(ctx)));
190 
191  return ff_filter_frame(outlink, out);
192 }
193 
194 static int config_output(AVFilterLink *outlink)
195 {
196  AVFilterContext *ctx = outlink->src;
197  StackContext *s = ctx->priv;
198  AVRational frame_rate = ctx->inputs[0]->frame_rate;
199  AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
200  int height = ctx->inputs[0]->h;
201  int width = ctx->inputs[0]->w;
202  FFFrameSyncIn *in;
203  int i, ret;
204 
205  s->desc = av_pix_fmt_desc_get(outlink->format);
206  if (!s->desc)
207  return AVERROR_BUG;
208 
209  if (s->is_vertical) {
210  for (i = 0; i < s->nb_inputs; i++) {
211  AVFilterLink *inlink = ctx->inputs[i];
212  StackItem *item = &s->items[i];
213 
214  if (ctx->inputs[i]->w != width) {
215  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);
216  return AVERROR(EINVAL);
217  }
218 
219  if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
220  return ret;
221  }
222 
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;
225 
226  if (i) {
227  item->y[1] = item->y[2] = AV_CEIL_RSHIFT(height, s->desc->log2_chroma_h);
228  item->y[0] = item->y[3] = height;
229 
230  height += ctx->inputs[i]->h;
231  }
232  }
233  } else if (s->is_horizontal) {
234  for (i = 0; i < s->nb_inputs; i++) {
235  AVFilterLink *inlink = ctx->inputs[i];
236  StackItem *item = &s->items[i];
237 
238  if (ctx->inputs[i]->h != height) {
239  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);
240  return AVERROR(EINVAL);
241  }
242 
243  if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
244  return ret;
245  }
246 
247  item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
248  item->height[0] = item->height[3] = inlink->h;
249 
250  if (i) {
251  if ((ret = av_image_fill_linesizes(item->x, inlink->format, width)) < 0) {
252  return ret;
253  }
254 
255  width += ctx->inputs[i]->w;
256  }
257  }
258  } else if (s->nb_grid_rows && s->nb_grid_columns) {
259  int inw = 0, inh = 0;
260  int k = 0;
261  int row_height;
262  height = 0;
263  width = 0;
264  for (i = 0; i < s->nb_grid_rows; i++, inh += row_height) {
265  row_height = ctx->inputs[i * s->nb_grid_columns]->h;
266  inw = 0;
267  for (int j = 0; j < s->nb_grid_columns; j++, k++) {
268  AVFilterLink *inlink = ctx->inputs[k];
269  StackItem *item = &s->items[k];
270 
271  if (ctx->inputs[k]->h != row_height) {
272  av_log(ctx, AV_LOG_ERROR, "Input %d height %d does not match current row's height %d.\n",
273  k, ctx->inputs[k]->h, row_height);
274  return AVERROR(EINVAL);
275  }
276 
277  if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
278  return ret;
279  }
280 
281  item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
282  item->height[0] = item->height[3] = inlink->h;
283 
284  if ((ret = av_image_fill_linesizes(item->x, inlink->format, inw)) < 0) {
285  return ret;
286  }
287 
288  item->y[1] = item->y[2] = AV_CEIL_RSHIFT(inh, s->desc->log2_chroma_h);
289  item->y[0] = item->y[3] = inh;
290  inw += ctx->inputs[k]->w;
291  }
292  height += row_height;
293  if (!i)
294  width = inw;
295  if (i && width != inw) {
296  av_log(ctx, AV_LOG_ERROR, "Row %d width %d does not match previous row width %d.\n", i, inw, width);
297  return AVERROR(EINVAL);
298  }
299  }
300  } else {
301  char *arg, *p = s->layout, *saveptr = NULL;
302  char *arg2, *p2, *saveptr2 = NULL;
303  char *arg3, *p3, *saveptr3 = NULL;
304  int inw, inh, size;
305 
306  if (s->fillcolor_enable) {
307  ff_draw_init(&s->draw, ctx->inputs[0]->format, 0);
308  ff_draw_color(&s->draw, &s->color, s->fillcolor);
309  }
310 
311  for (i = 0; i < s->nb_inputs; i++) {
312  AVFilterLink *inlink = ctx->inputs[i];
313  StackItem *item = &s->items[i];
314 
315  if (!(arg = av_strtok(p, "|", &saveptr)))
316  return AVERROR(EINVAL);
317 
318  p = NULL;
319 
320  if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
321  return ret;
322  }
323 
324  item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
325  item->height[0] = item->height[3] = inlink->h;
326 
327  p2 = arg;
328  inw = inh = 0;
329 
330  for (int j = 0; j < 2; j++) {
331  if (!(arg2 = av_strtok(p2, "_", &saveptr2)))
332  return AVERROR(EINVAL);
333 
334  p2 = NULL;
335  p3 = arg2;
336  while ((arg3 = av_strtok(p3, "+", &saveptr3))) {
337  p3 = NULL;
338  if (sscanf(arg3, "w%d", &size) == 1) {
339  if (size == i || size < 0 || size >= s->nb_inputs)
340  return AVERROR(EINVAL);
341 
342  if (!j)
343  inw += ctx->inputs[size]->w;
344  else
345  inh += ctx->inputs[size]->w;
346  } else if (sscanf(arg3, "h%d", &size) == 1) {
347  if (size == i || size < 0 || size >= s->nb_inputs)
348  return AVERROR(EINVAL);
349 
350  if (!j)
351  inw += ctx->inputs[size]->h;
352  else
353  inh += ctx->inputs[size]->h;
354  } else if (sscanf(arg3, "%d", &size) == 1) {
355  if (size < 0)
356  return AVERROR(EINVAL);
357 
358  if (!j)
359  inw += size;
360  else
361  inh += size;
362  } else {
363  return AVERROR(EINVAL);
364  }
365  }
366  }
367 
368  if ((ret = av_image_fill_linesizes(item->x, inlink->format, inw)) < 0) {
369  return ret;
370  }
371 
372  item->y[1] = item->y[2] = AV_CEIL_RSHIFT(inh, s->desc->log2_chroma_h);
373  item->y[0] = item->y[3] = inh;
374 
375  width = FFMAX(width, inlink->w + inw);
376  height = FFMAX(height, inlink->h + inh);
377  }
378  }
379 
380  s->nb_planes = av_pix_fmt_count_planes(outlink->format);
381 
382  outlink->w = width;
383  outlink->h = height;
384  outlink->frame_rate = frame_rate;
385  outlink->sample_aspect_ratio = sar;
386 
387  for (i = 1; i < s->nb_inputs; i++) {
388  AVFilterLink *inlink = ctx->inputs[i];
389  if (outlink->frame_rate.num != inlink->frame_rate.num ||
390  outlink->frame_rate.den != inlink->frame_rate.den) {
392  "Video inputs have different frame rates, output will be VFR\n");
393  outlink->frame_rate = av_make_q(1, 0);
394  break;
395  }
396  }
397 
398  if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
399  return ret;
400 
401  in = s->fs.in;
402  s->fs.opaque = s;
403  s->fs.on_event = process_frame;
404 
405  for (i = 0; i < s->nb_inputs; i++) {
406  AVFilterLink *inlink = ctx->inputs[i];
407 
408  in[i].time_base = inlink->time_base;
409  in[i].sync = 1;
410  in[i].before = EXT_STOP;
411  in[i].after = s->shortest ? EXT_STOP : EXT_INFINITY;
412  }
413 
414  ret = ff_framesync_configure(&s->fs);
415  outlink->time_base = s->fs.time_base;
416 
417  return ret;
418 }
419 
421 {
422  StackContext *s = ctx->priv;
423 
424  ff_framesync_uninit(&s->fs);
425  av_freep(&s->frames);
426  av_freep(&s->items);
427 }
428 
430 {
431  StackContext *s = ctx->priv;
432  return ff_framesync_activate(&s->fs);
433 }
434 
435 #define OFFSET(x) offsetof(StackContext, x)
436 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
437 static const AVOption stack_options[] = {
438  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
439  { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
440  { NULL },
441 };
442 
443 AVFILTER_DEFINE_CLASS_EXT(stack, "(h|v)stack", stack_options);
444 
445 static const AVFilterPad outputs[] = {
446  {
447  .name = "default",
448  .type = AVMEDIA_TYPE_VIDEO,
449  .config_props = config_output,
450  },
451 };
452 
453 #if CONFIG_HSTACK_FILTER
454 
455 const AVFilter ff_vf_hstack = {
456  .name = "hstack",
457  .description = NULL_IF_CONFIG_SMALL("Stack video inputs horizontally."),
458  .priv_class = &stack_class,
459  .priv_size = sizeof(StackContext),
462  .init = init,
463  .uninit = uninit,
464  .activate = activate,
466 };
467 
468 #endif /* CONFIG_HSTACK_FILTER */
469 
470 #if CONFIG_VSTACK_FILTER
471 
472 const AVFilter ff_vf_vstack = {
473  .name = "vstack",
474  .description = NULL_IF_CONFIG_SMALL("Stack video inputs vertically."),
475  .priv_class = &stack_class,
476  .priv_size = sizeof(StackContext),
479  .init = init,
480  .uninit = uninit,
481  .activate = activate,
483 };
484 
485 #endif /* CONFIG_VSTACK_FILTER */
486 
487 #if CONFIG_XSTACK_FILTER
488 
489 static const AVOption xstack_options[] = {
490  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
491  { "layout", "set custom layout", OFFSET(layout), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, .flags = FLAGS },
492  { "grid", "set fixed size grid layout", OFFSET(nb_grid_columns), AV_OPT_TYPE_IMAGE_SIZE, {.str=NULL}, 0, 0, .flags = FLAGS },
493  { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
494  { "fill", "set the color for unused pixels", OFFSET(fillcolor_str), AV_OPT_TYPE_STRING, {.str = "none"}, .flags = FLAGS },
495  { NULL },
496 };
497 
498 AVFILTER_DEFINE_CLASS(xstack);
499 
500 const AVFilter ff_vf_xstack = {
501  .name = "xstack",
502  .description = NULL_IF_CONFIG_SMALL("Stack video inputs into custom layout."),
503  .priv_size = sizeof(StackContext),
504  .priv_class = &xstack_class,
507  .init = init,
508  .uninit = uninit,
509  .activate = activate,
511 };
512 
513 #endif /* CONFIG_XSTACK_FILTER */
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:101
StackItem::x
int x[4]
Definition: vf_stack.c:37
FFFrameSyncIn::time_base
AVRational time_base
Time base for the incoming frames.
Definition: framesync.h:117
ff_framesync_configure
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:134
StackContext::fillcolor
uint8_t fillcolor[4]
Definition: vf_stack.c:53
FFDrawColor
Definition: drawutils.h:50
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
StackContext::fillcolor_str
char * fillcolor_str
Definition: vf_stack.c:54
ff_framesync_uninit
void ff_framesync_uninit(FFFrameSync *fs)
Free all memory currently allocated.
Definition: framesync.c:304
out
FILE * out
Definition: movenc.c:54
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1009
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2858
av_parse_color
int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen, void *log_ctx)
Put the RGBA values that correspond to color_string in rgba_color.
Definition: parseutils.c:356
ff_framesync_get_frame
int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe, unsigned get)
Get the current frame in an input.
Definition: framesync.c:267
StackContext::fs
FFFrameSync fs
Definition: vf_stack.c:62
inlink
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
Definition: filter_design.txt:212
av_asprintf
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:116
AVFILTER_DEFINE_CLASS_EXT
AVFILTER_DEFINE_CLASS_EXT(stack, "(h|v)stack", stack_options)
StackContext::color
FFDrawColor color
Definition: vf_stack.c:58
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
pixdesc.h
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_stack.c:65
AVOption
AVOption.
Definition: opt.h:251
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:167
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:175
FFFrameSync
Frame sync structure.
Definition: framesync.h:168
EXT_INFINITY
@ EXT_INFINITY
Extend the frame to infinity.
Definition: framesync.h:75
video.h
StackContext::shortest
int shortest
Definition: vf_stack.c:47
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:346
av_image_copy_plane
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:374
OFFSET
#define OFFSET(x)
Definition: vf_stack.c:435
formats.h
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2898
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_stack.c:420
EXT_STOP
@ EXT_STOP
Completely stop all streams with this one.
Definition: framesync.h:65
AV_PIX_FMT_FLAG_HWACCEL
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:128
FFFrameSyncIn
Input stream structure.
Definition: framesync.h:102
outputs
static const AVFilterPad outputs[]
Definition: vf_stack.c:445
activate
static int activate(AVFilterContext *ctx)
Definition: vf_stack.c:429
StackContext::nb_planes
int nb_planes
Definition: vf_stack.c:50
FFFrameSyncIn::sync
unsigned sync
Synchronization level: frames on input at the highest sync level will generate output frame events.
Definition: framesync.h:160
AVFILTER_FLAG_DYNAMIC_INPUTS
#define AVFILTER_FLAG_DYNAMIC_INPUTS
The number of the filter inputs is not determined just by AVFilter.inputs.
Definition: avfilter.h:116
AVRational::num
int num
Numerator.
Definition: rational.h:59
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:49
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_stack.c:79
av_cold
#define av_cold
Definition: attributes.h:90
ff_set_common_formats
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:749
width
#define width
av_image_fill_linesizes
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
Definition: imgutils.c:89
s
#define s(width, name)
Definition: cbs_vp9.c:256
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:50
StackItem::height
int height[4]
Definition: vf_stack.c:39
av_strtok
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok().
Definition: avstring.c:189
StackContext::is_vertical
int is_vertical
Definition: vf_stack.c:48
ctx
AVFormatContext * ctx
Definition: movenc.c:48
av_rescale_q
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
ff_draw_init
int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
Definition: drawutils.c:154
process_frame
static int process_frame(FFFrameSync *fs)
Definition: vf_stack.c:164
arg
const char * arg
Definition: jacosubdec.c:67
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_stack.c:194
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
fs
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:258
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
ff_append_inpad_free_name
int ff_append_inpad_free_name(AVFilterContext *f, AVFilterPad *p)
Definition: avfilter.c:131
AV_OPT_TYPE_IMAGE_SIZE
@ AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
Definition: opt.h:235
parseutils.h
ff_vf_hstack
const AVFilter ff_vf_hstack
ff_vf_vstack
const AVFilter ff_vf_vstack
StackContext::items
StackItem * items
Definition: vf_stack.c:60
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:115
size
int size
Definition: twinvq_data.h:10344
av_make_q
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
ff_fill_rectangle
void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_x, int dst_y, int w, int h)
Fill a rectangle with an uniform color.
Definition: drawutils.c:234
AV_PIX_FMT_FLAG_BITSTREAM
#define AV_PIX_FMT_FLAG_BITSTREAM
All values of a component are bit-wise packed end to end.
Definition: pixdesc.h:124
StackContext::is_horizontal
int is_horizontal
Definition: vf_stack.c:49
StackContext::draw
FFDrawContext draw
Definition: vf_stack.c:57
height
#define height
internal.h
AVFILTER_DEFINE_CLASS
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:325
StackContext::desc
const AVPixFmtDescriptor * desc
Definition: vf_stack.c:44
layout
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel layout
Definition: filter_design.txt:18
ff_formats_pixdesc_filter
AVFilterFormats * ff_formats_pixdesc_filter(unsigned want, unsigned rej)
Construct a formats list containing all pixel formats with certain properties.
Definition: formats.c:498
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
StackContext::nb_grid_columns
int nb_grid_columns
Definition: vf_stack.c:51
FLAGS
#define FLAGS
Definition: vf_stack.c:436
ff_draw_supported_pixel_formats
AVFilterFormats * ff_draw_supported_pixel_formats(unsigned flags)
Return the list of pixel formats supported by the draw functions.
Definition: drawutils.c:650
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:793
StackContext::layout
char * layout
Definition: vf_stack.c:46
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
FFDrawContext
Definition: drawutils.h:35
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:55
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:272
ff_draw_color
void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
Prepare a color.
Definition: drawutils.c:159
AVFilter
Filter definition.
Definition: avfilter.h:171
ret
ret
Definition: filter_design.txt:187
AVFilterPad::type
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:60
ff_vf_xstack
const AVFilter ff_vf_xstack
ff_framesync_init
int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
Initialize a frame sync structure.
Definition: framesync.c:86
FFFrameSyncIn::before
enum FFFrameSyncExtMode before
Extrapolation mode for timestamps before the first frame.
Definition: framesync.h:107
StackItem::y
int y[4]
Definition: vf_stack.c:37
framesync.h
AVRational::den
int den
Denominator.
Definition: rational.h:60
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
avfilter.h
StackItem::linesize
int linesize[4]
Definition: vf_stack.c:38
AVFilterContext
An instance of a filter.
Definition: avfilter.h:415
StackContext::nb_grid_rows
int nb_grid_rows
Definition: vf_stack.c:52
AVFILTER_FLAG_SLICE_THREADS
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:127
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
StackContext::fillcolor_enable
int fillcolor_enable
Definition: vf_stack.c:55
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
StackItem
Definition: vf_stack.c:36
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:244
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:191
process_slice
static int process_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
Definition: vf_stack.c:141
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
StackContext
Definition: vf_stack.c:42
imgutils.h
AVERROR_BUG
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:52
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:370
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
FFFrameSyncIn::after
enum FFFrameSyncExtMode after
Extrapolation mode for timestamps after the last frame.
Definition: framesync.h:112
ff_framesync_activate
int ff_framesync_activate(FFFrameSync *fs)
Examine the frames in the filter's input and try to produce output.
Definition: framesync.c:355
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
drawutils.h
ff_filter_execute
static av_always_inline int ff_filter_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
Definition: internal.h:142
AV_PIX_FMT_FLAG_PAL
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:120
stack_options
static const AVOption stack_options[]
Definition: vf_stack.c:437
StackContext::nb_inputs
int nb_inputs
Definition: vf_stack.c:45
StackContext::frames
AVFrame ** frames
Definition: vf_stack.c:61