FFmpeg  4.4.4
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;
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 
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 
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 
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 */
AVFilter ff_vf_xstack
AVFilter ff_vf_hstack
AVFilter ff_vf_vstack
#define av_cold
Definition: attributes.h:88
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
uint8_t
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1096
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:802
Main libavfilter public API header.
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define s(width, name)
Definition: cbs_vp9.c:257
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:259
uint64_t layout
#define FFMIN(a, b)
Definition: common.h:105
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
#define FFMAX(a, b)
Definition: common.h:103
#define NULL
Definition: coverity.c:32
int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
Init a draw context.
Definition: drawutils.c:84
void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
Prepare a color.
Definition: drawutils.c:137
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
AVFilterFormats * ff_draw_supported_pixel_formats(unsigned flags)
Return the list of pixel formats supported by the draw functions.
Definition: drawutils.c:637
misc drawing utilities
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:367
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:587
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:124
int ff_framesync_activate(FFFrameSync *fs)
Examine the frames in the filter's input and try to produce output.
Definition: framesync.c:341
int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe, unsigned get)
Get the current frame in an input.
Definition: framesync.c:253
void ff_framesync_uninit(FFFrameSync *fs)
Free all memory currently allocated.
Definition: framesync.c:290
int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
Initialize a frame sync structure.
Definition: framesync.c:84
@ EXT_STOP
Completely stop all streams with this one.
Definition: framesync.h:65
@ EXT_INFINITY
Extend the frame to infinity.
Definition: framesync.h:75
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:117
#define AVFILTER_FLAG_DYNAMIC_INPUTS
The number of the filter inputs is not determined just by AVFilter.inputs.
Definition: avfilter.h:106
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
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
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:245
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
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:373
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
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
misc image utilities
int i
Definition: input.c:407
const char * arg
Definition: jacosubdec.c:66
static int ff_insert_inpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new input pad for the filter.
Definition: internal.h:240
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:288
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
AVOptions.
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
misc parsing utilities
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2613
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
#define AV_PIX_FMT_FLAG_BITSTREAM
All values of a component are bit-wise packed end to end.
Definition: pixdesc.h:136
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:140
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:132
formats
Definition: signature.h:48
Describe the class of an AVClass context structure.
Definition: log.h:67
An instance of a filter.
Definition: avfilter.h:341
A list of supported formats for one end of a filter link.
Definition: formats.h:65
A filter pad used for either input or output.
Definition: internal.h:54
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
const char * name
Pad name.
Definition: internal.h:60
Filter definition.
Definition: avfilter.h:145
const char * name
Filter name.
Definition: avfilter.h:149
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1699
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
AVOption.
Definition: opt.h:248
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int num
Numerator.
Definition: rational.h:59
int den
Denominator.
Definition: rational.h:60
Input stream structure.
Definition: framesync.h:81
Frame sync structure.
Definition: framesync.h:146
uint8_t fillcolor[4]
Definition: vf_stack.c:49
const AVPixFmtDescriptor * desc
Definition: vf_stack.c:42
char * layout
Definition: vf_stack.c:44
FFDrawContext draw
Definition: vf_stack.c:53
AVFrame ** frames
Definition: vf_stack.c:57
FFFrameSync fs
Definition: vf_stack.c:58
int is_horizontal
Definition: vf_stack.c:47
FFDrawColor color
Definition: vf_stack.c:54
int fillcolor_enable
Definition: vf_stack.c:51
char * fillcolor_str
Definition: vf_stack.c:50
int is_vertical
Definition: vf_stack.c:46
int nb_inputs
Definition: vf_stack.c:43
int nb_planes
Definition: vf_stack.c:48
StackItem * items
Definition: vf_stack.c:56
int shortest
Definition: vf_stack.c:45
int linesize[4]
Definition: vf_stack.c:36
int height[4]
Definition: vf_stack.c:37
int x[4]
Definition: vf_stack.c:35
int y[4]
Definition: vf_stack.c:35
#define av_freep(p)
#define av_log(a,...)
FILE * out
Definition: movenc.c:54
AVFormatContext * ctx
Definition: movenc.c:48
#define height
#define width
int size
static const AVOption stack_options[]
Definition: vf_stack.c:392
static int process_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
Definition: vf_stack.c:135
static int query_formats(AVFilterContext *ctx)
Definition: vf_stack.c:61
#define FLAGS
Definition: vf_stack.c:391
static const AVFilterPad outputs[]
Definition: vf_stack.c:398
static int activate(AVFilterContext *ctx)
Definition: vf_stack.c:384
static av_cold int init(AVFilterContext *ctx)
Definition: vf_stack.c:80
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_stack.c:371
#define OFFSET(x)
Definition: vf_stack.c:390
static int config_output(AVFilterLink *outlink)
Definition: vf_stack.c:187
static int process_frame(FFFrameSync *fs)
Definition: vf_stack.c:158
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:104