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 "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;
43  int nb_inputs;
44  char *layout;
45  int shortest;
48  int nb_planes;
49  uint8_t fillcolor[4];
52 
55 
59 } StackContext;
60 
62 {
64  StackContext *s = ctx->priv;
65  int ret;
66 
67  if (s->fillcolor_enable) {
69  }
70 
75  if (ret < 0)
76  return ret;
78 }
79 
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 
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 
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 
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) {
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 
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 
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 const 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,
418  .outputs = outputs,
419  .init = init,
420  .uninit = uninit,
421  .activate = activate,
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 const 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,
438  .outputs = outputs,
439  .init = init,
440  .uninit = uninit,
441  .activate = activate,
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 const 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,
465  .outputs = outputs,
466  .init = init,
467  .uninit = uninit,
468  .activate = activate,
470 };
471 
472 #endif /* CONFIG_XSTACK_FILTER */
formats
formats
Definition: signature.h:48
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:99
StackItem::x
int x[4]
Definition: vf_stack.c:35
FFFrameSyncIn::time_base
AVRational time_base
Time base for the incoming frames.
Definition: framesync.h:96
ff_framesync_configure
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:124
StackContext::fillcolor
uint8_t fillcolor[4]
Definition: vf_stack.c:49
FFDrawColor
Definition: drawutils.h:49
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:50
ff_framesync_uninit
void ff_framesync_uninit(FFFrameSync *fs)
Free all memory currently allocated.
Definition: framesync.c:290
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:978
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2541
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:354
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:253
ff_formats_pixdesc_filter
int ff_formats_pixdesc_filter(AVFilterFormats **rfmts, unsigned want, unsigned rej)
Construct a formats list containing all pixel formats with certain properties.
Definition: formats.c:360
StackContext::fs
FFFrameSync fs
Definition: vf_stack.c:58
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:113
StackContext::color
FFDrawColor color
Definition: vf_stack.c:54
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
pixdesc.h
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_stack.c:61
AVOption
AVOption.
Definition: opt.h:248
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:197
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:149
FFFrameSync
Frame sync structure.
Definition: framesync.h:146
EXT_INFINITY
@ EXT_INFINITY
Extend the frame to infinity.
Definition: framesync.h:75
video.h
AVFormatContext::internal
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1554
StackContext::shortest
int shortest
Definition: vf_stack.c:45
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
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:390
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:65
formats.h
ff_insert_inpad
static int ff_insert_inpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new input pad for the filter.
Definition: internal.h:240
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2581
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_stack.c:371
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:129
FFFrameSyncIn
Input stream structure.
Definition: framesync.h:81
outputs
static const AVFilterPad outputs[]
Definition: vf_stack.c:398
activate
static int activate(AVFilterContext *ctx)
Definition: vf_stack.c:384
StackContext::nb_planes
int nb_planes
Definition: vf_stack.c:48
FFFrameSyncIn::sync
unsigned sync
Synchronization level: frames on input at the highest sync level will generate output frame events.
Definition: framesync.h:139
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:106
AVRational::num
int num
Numerator.
Definition: rational.h:59
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:181
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_stack.c:80
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:580
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:257
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
StackItem::height
int height[4]
Definition: vf_stack.c:37
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:186
StackContext::is_vertical
int is_vertical
Definition: vf_stack.c:46
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)
Init a draw context.
Definition: drawutils.c:84
process_frame
static int process_frame(FFFrameSync *fs)
Definition: vf_stack.c:158
arg
const char * arg
Definition: jacosubdec.c:67
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_stack.c:187
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
NULL
#define NULL
Definition: coverity.c:32
fs
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:259
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
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:56
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:117
FFMAX
#define FFMAX(a, b)
Definition: common.h:103
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:224
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:125
StackContext::is_horizontal
int is_horizontal
Definition: vf_stack.c:47
StackContext::draw
FFDrawContext draw
Definition: vf_stack.c:53
height
#define height
FFMIN
#define FFMIN(a, b)
Definition: common.h:105
internal.h
AVFILTER_DEFINE_CLASS
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:288
StackContext::desc
const AVPixFmtDescriptor * desc
Definition: vf_stack.c:42
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
i
int i
Definition: input.c:407
FLAGS
#define FLAGS
Definition: vf_stack.c:391
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:637
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:762
StackContext::layout
char * layout
Definition: vf_stack.c:44
FFDrawContext
Definition: drawutils.h:35
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
ff_draw_color
void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
Prepare a color.
Definition: drawutils.c:137
AVFilter
Filter definition.
Definition: avfilter.h:145
ret
ret
Definition: filter_design.txt:187
AVFilterPad::type
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
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:84
FFFrameSyncIn::before
enum FFFrameSyncExtMode before
Extrapolation mode for timestamps before the first frame.
Definition: framesync.h:86
StackItem::y
int y[4]
Definition: vf_stack.c:35
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:251
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:36
AVFilterContext
An instance of a filter.
Definition: avfilter.h:333
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:117
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:259
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
StackContext::fillcolor_enable
int fillcolor_enable
Definition: vf_stack.c:51
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:70
StackItem
Definition: vf_stack.c:34
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
process_slice
static int process_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
Definition: vf_stack.c:135
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
StackContext
Definition: vf_stack.c:40
imgutils.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVERROR_BUG
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:334
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
FFFrameSyncIn::after
enum FFFrameSyncExtMode after
Extrapolation mode for timestamps after the last frame.
Definition: framesync.h:91
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:341
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
drawutils.h
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:121
stack_options
static const AVOption stack_options[]
Definition: vf_stack.c:392
StackContext::nb_inputs
int nb_inputs
Definition: vf_stack.c:43
StackContext::frames
AVFrame ** frames
Definition: vf_stack.c:57