FFmpeg
vf_extractplanes.c
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1 /*
2  * Copyright (c) 2013 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/pixdesc.h"
27 
28 #include "avfilter.h"
29 #include "drawutils.h"
30 #include "filters.h"
31 #include "internal.h"
32 
33 #define PLANE_R 0x01
34 #define PLANE_G 0x02
35 #define PLANE_B 0x04
36 #define PLANE_A 0x08
37 #define PLANE_Y 0x10
38 #define PLANE_U 0x20
39 #define PLANE_V 0x40
40 
41 typedef struct ExtractPlanesContext {
42  const AVClass *class;
43  int requested_planes;
44  int map[4];
45  int linesize[4];
46  int is_packed;
47  int depth;
48  int step;
49 } ExtractPlanesContext;
50 
51 #define OFFSET(x) offsetof(ExtractPlanesContext, x)
52 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
53 static const AVOption extractplanes_options[] = {
54  { "planes", "set planes", OFFSET(requested_planes), AV_OPT_TYPE_FLAGS, {.i64=1}, 1, 0xff, FLAGS, "flags"},
55  { "y", "set luma plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_Y}, 0, 0, FLAGS, "flags"},
56  { "u", "set u plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_U}, 0, 0, FLAGS, "flags"},
57  { "v", "set v plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_V}, 0, 0, FLAGS, "flags"},
58  { "r", "set red plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_R}, 0, 0, FLAGS, "flags"},
59  { "g", "set green plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_G}, 0, 0, FLAGS, "flags"},
60  { "b", "set blue plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_B}, 0, 0, FLAGS, "flags"},
61  { "a", "set alpha plane", 0, AV_OPT_TYPE_CONST, {.i64=PLANE_A}, 0, 0, FLAGS, "flags"},
62  { NULL }
63 };
64 
65 AVFILTER_DEFINE_CLASS(extractplanes);
66 
67 #define EIGHTBIT_FORMATS \
68  AV_PIX_FMT_YUV410P, \
69  AV_PIX_FMT_YUV411P, \
70  AV_PIX_FMT_YUV440P, \
71  AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVA420P, \
72  AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA422P, \
73  AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, \
74  AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P, \
75  AV_PIX_FMT_YUVJ411P, \
76  AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVA444P, \
77  AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY8A, \
78  AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, \
79  AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA, \
80  AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR, \
81  AV_PIX_FMT_RGB0, AV_PIX_FMT_BGR0, \
82  AV_PIX_FMT_0RGB, AV_PIX_FMT_0BGR, \
83  AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP
84 
85 #define HIGHDEPTH_FORMATS(suf) \
86  AV_PIX_FMT_YA16##suf, \
87  AV_PIX_FMT_GRAY9##suf, \
88  AV_PIX_FMT_GRAY10##suf, \
89  AV_PIX_FMT_GRAY12##suf, \
90  AV_PIX_FMT_GRAY14##suf, \
91  AV_PIX_FMT_GRAY16##suf, \
92  AV_PIX_FMT_YUV420P16##suf, AV_PIX_FMT_YUVA420P16##suf, \
93  AV_PIX_FMT_YUV422P16##suf, AV_PIX_FMT_YUVA422P16##suf, \
94  AV_PIX_FMT_YUV444P16##suf, AV_PIX_FMT_YUVA444P16##suf, \
95  AV_PIX_FMT_RGB48##suf, AV_PIX_FMT_BGR48##suf, \
96  AV_PIX_FMT_RGBA64##suf, AV_PIX_FMT_BGRA64##suf, \
97  AV_PIX_FMT_GBRP16##suf, AV_PIX_FMT_GBRAP16##suf, \
98  AV_PIX_FMT_YUV420P10##suf, \
99  AV_PIX_FMT_YUV422P10##suf, \
100  AV_PIX_FMT_YUV444P10##suf, \
101  AV_PIX_FMT_YUV440P10##suf, \
102  AV_PIX_FMT_YUVA420P10##suf, \
103  AV_PIX_FMT_YUVA422P10##suf, \
104  AV_PIX_FMT_YUVA444P10##suf, \
105  AV_PIX_FMT_YUV420P12##suf, \
106  AV_PIX_FMT_YUV422P12##suf, \
107  AV_PIX_FMT_YUV444P12##suf, \
108  AV_PIX_FMT_YUV440P12##suf, \
109  AV_PIX_FMT_YUVA422P12##suf, \
110  AV_PIX_FMT_YUVA444P12##suf, \
111  AV_PIX_FMT_GBRP10##suf, AV_PIX_FMT_GBRAP10##suf, \
112  AV_PIX_FMT_GBRP12##suf, AV_PIX_FMT_GBRAP12##suf, \
113  AV_PIX_FMT_YUV420P9##suf, \
114  AV_PIX_FMT_YUV422P9##suf, \
115  AV_PIX_FMT_YUV444P9##suf, \
116  AV_PIX_FMT_YUVA420P9##suf, \
117  AV_PIX_FMT_YUVA422P9##suf, \
118  AV_PIX_FMT_YUVA444P9##suf, \
119  AV_PIX_FMT_GBRP9##suf, \
120  AV_PIX_FMT_GBRP14##suf, \
121  AV_PIX_FMT_YUV420P14##suf, \
122  AV_PIX_FMT_YUV422P14##suf, \
123  AV_PIX_FMT_YUV444P14##suf
124 
125 #define FLOAT_FORMATS(suf) \
126  AV_PIX_FMT_GRAYF32##suf, \
127  AV_PIX_FMT_RGBF32##suf, AV_PIX_FMT_RGBAF32##suf, \
128  AV_PIX_FMT_GBRPF32##suf, AV_PIX_FMT_GBRAPF32##suf \
129 
130 static int query_formats(AVFilterContext *ctx)
131 {
132  static const enum AVPixelFormat in_pixfmts_le[] = {
133  EIGHTBIT_FORMATS,
134  HIGHDEPTH_FORMATS(LE),
135  FLOAT_FORMATS(LE),
136  AV_PIX_FMT_NONE,
137  };
138  static const enum AVPixelFormat in_pixfmts_be[] = {
139  EIGHTBIT_FORMATS,
140  HIGHDEPTH_FORMATS(BE),
141  FLOAT_FORMATS(BE),
142  AV_PIX_FMT_NONE,
143  };
144  static const enum AVPixelFormat out8_pixfmts[] = { AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE };
145  static const enum AVPixelFormat out9le_pixfmts[] = { AV_PIX_FMT_GRAY9LE, AV_PIX_FMT_NONE };
146  static const enum AVPixelFormat out9be_pixfmts[] = { AV_PIX_FMT_GRAY9BE, AV_PIX_FMT_NONE };
147  static const enum AVPixelFormat out10le_pixfmts[] = { AV_PIX_FMT_GRAY10LE, AV_PIX_FMT_NONE };
148  static const enum AVPixelFormat out10be_pixfmts[] = { AV_PIX_FMT_GRAY10BE, AV_PIX_FMT_NONE };
149  static const enum AVPixelFormat out12le_pixfmts[] = { AV_PIX_FMT_GRAY12LE, AV_PIX_FMT_NONE };
150  static const enum AVPixelFormat out12be_pixfmts[] = { AV_PIX_FMT_GRAY12BE, AV_PIX_FMT_NONE };
151  static const enum AVPixelFormat out14le_pixfmts[] = { AV_PIX_FMT_GRAY14LE, AV_PIX_FMT_NONE };
152  static const enum AVPixelFormat out14be_pixfmts[] = { AV_PIX_FMT_GRAY14BE, AV_PIX_FMT_NONE };
153  static const enum AVPixelFormat out16le_pixfmts[] = { AV_PIX_FMT_GRAY16LE, AV_PIX_FMT_NONE };
154  static const enum AVPixelFormat out16be_pixfmts[] = { AV_PIX_FMT_GRAY16BE, AV_PIX_FMT_NONE };
155  static const enum AVPixelFormat out32le_pixfmts[] = { AV_PIX_FMT_GRAYF32LE, AV_PIX_FMT_NONE };
156  static const enum AVPixelFormat out32be_pixfmts[] = { AV_PIX_FMT_GRAYF32BE, AV_PIX_FMT_NONE };
157  const enum AVPixelFormat *out_pixfmts, *in_pixfmts;
158  const AVPixFmtDescriptor *desc;
159  AVFilterFormats *avff;
160  int i, ret, depth = 0, be = 0;
161 
162  if (!ctx->inputs[0]->incfg.formats ||
163  !ctx->inputs[0]->incfg.formats->nb_formats) {
164  return AVERROR(EAGAIN);
165  }
166 
167  avff = ctx->inputs[0]->incfg.formats;
168  desc = av_pix_fmt_desc_get(avff->formats[0]);
169  depth = desc->comp[0].depth;
170  be = desc->flags & AV_PIX_FMT_FLAG_BE;
171  if (be) {
172  in_pixfmts = in_pixfmts_be;
173  } else {
174  in_pixfmts = in_pixfmts_le;
175  }
176  if (!ctx->inputs[0]->outcfg.formats)
177  if ((ret = ff_formats_ref(ff_make_format_list(in_pixfmts), &ctx->inputs[0]->outcfg.formats)) < 0)
178  return ret;
179 
180  for (i = 1; i < avff->nb_formats; i++) {
181  desc = av_pix_fmt_desc_get(avff->formats[i]);
182  if (depth != desc->comp[0].depth ||
183  be != (desc->flags & AV_PIX_FMT_FLAG_BE)) {
184  return AVERROR(EAGAIN);
185  }
186  }
187 
188  if (depth == 8)
189  out_pixfmts = out8_pixfmts;
190  else if (!be && depth == 9)
191  out_pixfmts = out9le_pixfmts;
192  else if (be && depth == 9)
193  out_pixfmts = out9be_pixfmts;
194  else if (!be && depth == 10)
195  out_pixfmts = out10le_pixfmts;
196  else if (be && depth == 10)
197  out_pixfmts = out10be_pixfmts;
198  else if (!be && depth == 12)
199  out_pixfmts = out12le_pixfmts;
200  else if (be && depth == 12)
201  out_pixfmts = out12be_pixfmts;
202  else if (!be && depth == 14)
203  out_pixfmts = out14le_pixfmts;
204  else if (be && depth == 14)
205  out_pixfmts = out14be_pixfmts;
206  else if (be && depth == 16)
207  out_pixfmts = out16be_pixfmts;
208  else if (!be && depth == 16)
209  out_pixfmts = out16le_pixfmts;
210  else if (be && depth == 32)
211  out_pixfmts = out32be_pixfmts;
212  else
213  out_pixfmts = out32le_pixfmts;
214 
215  for (i = 0; i < ctx->nb_outputs; i++)
216  if ((ret = ff_formats_ref(ff_make_format_list(out_pixfmts), &ctx->outputs[i]->incfg.formats)) < 0)
217  return ret;
218  return 0;
219 }
220 
221 static int config_input(AVFilterLink *inlink)
222 {
223  AVFilterContext *ctx = inlink->dst;
224  ExtractPlanesContext *s = ctx->priv;
225  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
226  int plane_avail, ret, i;
227  uint8_t rgba_map[4];
228 
229  plane_avail = ((desc->flags & AV_PIX_FMT_FLAG_RGB) ? PLANE_R|PLANE_G|PLANE_B :
230  PLANE_Y |
231  ((desc->nb_components > 2) ? PLANE_U|PLANE_V : 0)) |
232  ((desc->flags & AV_PIX_FMT_FLAG_ALPHA) ? PLANE_A : 0);
233  if (s->requested_planes & ~plane_avail) {
234  av_log(ctx, AV_LOG_ERROR, "Requested planes not available.\n");
235  return AVERROR(EINVAL);
236  }
237  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
238  return ret;
239 
240  s->depth = desc->comp[0].depth >> 3;
241  s->step = av_get_padded_bits_per_pixel(desc) >> 3;
242  s->is_packed = !(desc->flags & AV_PIX_FMT_FLAG_PLANAR) &&
243  (desc->nb_components > 1);
244  if (desc->flags & AV_PIX_FMT_FLAG_RGB) {
245  ff_fill_rgba_map(rgba_map, inlink->format);
246  for (i = 0; i < 4; i++)
247  s->map[i] = rgba_map[s->map[i]];
248  }
249 
250  return 0;
251 }
252 
253 static int config_output(AVFilterLink *outlink)
254 {
255  AVFilterContext *ctx = outlink->src;
256  AVFilterLink *inlink = ctx->inputs[0];
257  ExtractPlanesContext *s = ctx->priv;
258  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
259  const int output = outlink->srcpad - ctx->output_pads;
260 
261  if (s->map[output] == 1 || s->map[output] == 2) {
262  outlink->h = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
263  outlink->w = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
264  }
265 
266  return 0;
267 }
268 
269 static void extract_from_packed(uint8_t *dst, int dst_linesize,
270  const uint8_t *src, int src_linesize,
271  int width, int height,
272  int depth, int step, int comp)
273 {
274  int x, y;
275 
276  for (y = 0; y < height; y++) {
277  switch (depth) {
278  case 1:
279  for (x = 0; x < width; x++)
280  dst[x] = src[x * step + comp];
281  break;
282  case 2:
283  for (x = 0; x < width; x++) {
284  dst[x * 2 ] = src[x * step + comp * 2 ];
285  dst[x * 2 + 1] = src[x * step + comp * 2 + 1];
286  }
287  break;
288  case 4:
289  for (x = 0; x < width; x++) {
290  dst[x * 4 ] = src[x * step + comp * 4 ];
291  dst[x * 4 + 1] = src[x * step + comp * 4 + 1];
292  dst[x * 4 + 2] = src[x * step + comp * 4 + 2];
293  dst[x * 4 + 3] = src[x * step + comp * 4 + 3];
294  }
295  break;
296  }
297  dst += dst_linesize;
298  src += src_linesize;
299  }
300 }
301 
302 static int extract_plane(AVFilterLink *outlink, AVFrame *frame)
303 {
304  AVFilterContext *ctx = outlink->src;
305  ExtractPlanesContext *s = ctx->priv;
306  const int idx = s->map[FF_OUTLINK_IDX(outlink)];
307  AVFrame *out;
308 
309  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
310  if (!out)
311  return AVERROR(ENOMEM);
312  av_frame_copy_props(out, frame);
313 
314  if (s->is_packed) {
315  extract_from_packed(out->data[0], out->linesize[0],
316  frame->data[0], frame->linesize[0],
317  outlink->w, outlink->h,
318  s->depth,
319  s->step, idx);
320  } else {
321  av_image_copy_plane(out->data[0], out->linesize[0],
322  frame->data[idx], frame->linesize[idx],
323  s->linesize[idx], outlink->h);
324  }
325 
326  return ff_filter_frame(outlink, out);
327 }
328 
329 static int activate(AVFilterContext *ctx)
330 {
331  AVFilterLink *inlink = ctx->inputs[0];
332  int status, ret;
333  AVFrame *in;
334  int64_t pts;
335 
336  for (int i = 0; i < ctx->nb_outputs; i++) {
337  FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[i], ctx);
338  }
339 
340  ret = ff_inlink_consume_frame(inlink, &in);
341  if (ret < 0)
342  return ret;
343  if (ret > 0) {
344  for (int i = 0; i < ctx->nb_outputs; i++) {
345  if (ff_outlink_get_status(ctx->outputs[i]))
346  continue;
347 
348  ret = extract_plane(ctx->outputs[i], in);
349  if (ret < 0)
350  break;
351  }
352 
353  av_frame_free(&in);
354  if (ret < 0)
355  return ret;
356  }
357 
358  if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
359  for (int i = 0; i < ctx->nb_outputs; i++) {
360  if (ff_outlink_get_status(ctx->outputs[i]))
361  continue;
362  ff_outlink_set_status(ctx->outputs[i], status, pts);
363  }
364  return 0;
365  }
366 
367  for (int i = 0; i < ctx->nb_outputs; i++) {
368  if (ff_outlink_get_status(ctx->outputs[i]))
369  continue;
370 
371  if (ff_outlink_frame_wanted(ctx->outputs[i])) {
372  ff_inlink_request_frame(inlink);
373  return 0;
374  }
375  }
376 
377  return FFERROR_NOT_READY;
378 }
379 
380 static av_cold int init(AVFilterContext *ctx)
381 {
382  ExtractPlanesContext *s = ctx->priv;
383  int planes = (s->requested_planes & 0xf) | (s->requested_planes >> 4);
384  int i, ret;
385 
386  for (i = 0; i < 4; i++) {
387  char *name;
388  AVFilterPad pad = { 0 };
389 
390  if (!(planes & (1 << i)))
391  continue;
392 
393  name = av_asprintf("out%d", ctx->nb_outputs);
394  if (!name)
395  return AVERROR(ENOMEM);
396  s->map[ctx->nb_outputs] = i;
397  pad.name = name;
398  pad.type = AVMEDIA_TYPE_VIDEO;
399  pad.config_props = config_output;
400 
401  if ((ret = ff_append_outpad_free_name(ctx, &pad)) < 0)
402  return ret;
403  }
404 
405  return 0;
406 }
407 
408 static const AVFilterPad extractplanes_inputs[] = {
409  {
410  .name = "default",
411  .type = AVMEDIA_TYPE_VIDEO,
412  .config_props = config_input,
413  },
414 };
415 
416 const AVFilter ff_vf_extractplanes = {
417  .name = "extractplanes",
418  .description = NULL_IF_CONFIG_SMALL("Extract planes as grayscale frames."),
419  .priv_size = sizeof(ExtractPlanesContext),
420  .priv_class = &extractplanes_class,
421  .init = init,
422  .activate = activate,
423  FILTER_INPUTS(extractplanes_inputs),
424  .outputs = NULL,
425  FILTER_QUERY_FUNC(query_formats),
426  .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
427 };
428 
429 #if CONFIG_ALPHAEXTRACT_FILTER
430 
431 static av_cold int init_alphaextract(AVFilterContext *ctx)
432 {
433  ExtractPlanesContext *s = ctx->priv;
434 
435  s->requested_planes = PLANE_A;
436  s->map[0] = 3;
437 
438  return 0;
439 }
440 
441 static const AVFilterPad alphaextract_outputs[] = {
442  {
443  .name = "default",
444  .type = AVMEDIA_TYPE_VIDEO,
445  .config_props = config_output,
446  },
447 };
448 
449 const AVFilter ff_vf_alphaextract = {
450  .name = "alphaextract",
451  .description = NULL_IF_CONFIG_SMALL("Extract an alpha channel as a "
452  "grayscale image component."),
453  .priv_size = sizeof(ExtractPlanesContext),
454  .init = init_alphaextract,
455  .activate = activate,
456  FILTER_INPUTS(extractplanes_inputs),
457  FILTER_OUTPUTS(alphaextract_outputs),
458  FILTER_QUERY_FUNC(query_formats),
459 };
460 #endif /* CONFIG_ALPHAEXTRACT_FILTER */
ff_vf_extractplanes
const AVFilter ff_vf_extractplanes
Definition: vf_extractplanes.c:416
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
be
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it be(in the first position) for now. Options ------- Then comes the options array. This is what will define the user accessible options. For example
AV_PIX_FMT_GRAY10BE
@ AV_PIX_FMT_GRAY10BE
Y , 10bpp, big-endian.
Definition: pixfmt.h:317
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
name
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option name
Definition: writing_filters.txt:88
planes
static const struct @346 planes[]
status
they must not be accessed directly The fifo field contains the frames that are queued in the input for processing by the filter The status_in and status_out fields contains the queued status(EOF or error) of the link
extractplanes_options
static const AVOption extractplanes_options[]
Definition: vf_extractplanes.c:53
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
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:380
out
FILE * out
Definition: movenc.c:54
comp
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
Definition: eamad.c:80
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:969
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2888
FFERROR_NOT_READY
return FFERROR_NOT_READY
Definition: filter_design.txt:204
output
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce output
Definition: filter_design.txt:225
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
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:99
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:330
pixdesc.h
step
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about which is also called distortion Distortion can be quantified by almost any quality measurement one chooses the sum of squared differences is used but more complex methods that consider psychovisual effects can be used as well It makes no difference in this discussion First step
Definition: rate_distortion.txt:58
ExtractPlanesContext::requested_planes
int requested_planes
Definition: vf_extractplanes.c:43
ExtractPlanesContext::linesize
int linesize[4]
Definition: vf_extractplanes.c:45
FLAGS
#define FLAGS
Definition: vf_extractplanes.c:52
AVOption
AVOption.
Definition: opt.h:251
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:171
AVFilterFormats::formats
int * formats
list of media formats
Definition: formats.h:66
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:165
AV_PIX_FMT_GRAY10LE
@ AV_PIX_FMT_GRAY10LE
Y , 10bpp, little-endian.
Definition: pixfmt.h:318
AV_PIX_FMT_GRAYF32LE
@ AV_PIX_FMT_GRAYF32LE
IEEE-754 single precision Y, 32bpp, little-endian.
Definition: pixfmt.h:361
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
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
AV_PIX_FMT_GRAY16BE
@ AV_PIX_FMT_GRAY16BE
Y , 16bpp, big-endian.
Definition: pixfmt.h:97
ff_inlink_consume_frame
int ff_inlink_consume_frame(AVFilterLink *link, AVFrame **rframe)
Take a frame from the link's FIFO and update the link's stats.
Definition: avfilter.c:1364
FF_FILTER_FORWARD_STATUS_BACK_ALL
#define FF_FILTER_FORWARD_STATUS_BACK_ALL(outlink, filter)
Forward the status on an output link to all input links.
Definition: filters.h:212
PLANE_A
#define PLANE_A
Definition: vf_extractplanes.c:36
ExtractPlanesContext::map
int map[4]
Definition: vf_extractplanes.c:44
ff_vf_alphaextract
const AVFilter ff_vf_alphaextract
AV_PIX_FMT_GRAY9LE
@ AV_PIX_FMT_GRAY9LE
Y , 9bpp, little-endian.
Definition: pixfmt.h:336
PLANE_B
#define PLANE_B
Definition: vf_extractplanes.c:35
pts
static int64_t pts
Definition: transcode_aac.c:653
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:49
extract_from_packed
static void extract_from_packed(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int width, int height, int depth, int step, int comp)
Definition: vf_extractplanes.c:269
activate
static int activate(AVFilterContext *ctx)
Definition: vf_extractplanes.c:329
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
extract_plane
static int extract_plane(AVFilterLink *outlink, AVFrame *frame)
Definition: vf_extractplanes.c:302
PLANE_Y
#define PLANE_Y
Definition: vf_extractplanes.c:37
ff_outlink_set_status
static void ff_outlink_set_status(AVFilterLink *link, int status, int64_t pts)
Set the status field of a link from the source filter.
Definition: filters.h:189
ff_inlink_request_frame
void ff_inlink_request_frame(AVFilterLink *link)
Mark that a frame is wanted on the link.
Definition: avfilter.c:1481
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
ff_formats_ref
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:596
FF_OUTLINK_IDX
#define FF_OUTLINK_IDX(link)
Definition: internal.h:338
filters.h
AV_PIX_FMT_FLAG_ALPHA
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
Definition: pixdesc.h:147
ctx
AVFormatContext * ctx
Definition: movenc.c:48
ExtractPlanesContext
Definition: vf_extractplanes.c:41
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_extractplanes.c:380
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:194
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:594
AVFilterFormats::nb_formats
unsigned nb_formats
number of formats
Definition: formats.h:65
PLANE_G
#define PLANE_G
Definition: vf_extractplanes.c:34
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
ff_inlink_acknowledge_status
int ff_inlink_acknowledge_status(AVFilterLink *link, int *rstatus, int64_t *rpts)
Test and acknowledge the change of status on the link.
Definition: avfilter.c:1318
AVFILTER_FLAG_DYNAMIC_OUTPUTS
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS
The number of the filter outputs is not determined just by AVFilter.outputs.
Definition: avfilter.h:112
AVFilterPad::config_props
int(* config_props)(AVFilterLink *link)
Link configuration callback.
Definition: internal.h:129
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
av_get_padded_bits_per_pixel
int av_get_padded_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel for the pixel format described by pixdesc, including any padding ...
Definition: pixdesc.c:2853
AV_PIX_FMT_FLAG_RGB
#define AV_PIX_FMT_FLAG_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale).
Definition: pixdesc.h:136
AV_PIX_FMT_GRAY12LE
@ AV_PIX_FMT_GRAY12LE
Y , 12bpp, little-endian.
Definition: pixfmt.h:316
ExtractPlanesContext::is_packed
int is_packed
Definition: vf_extractplanes.c:46
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_extractplanes.c:253
height
#define height
OFFSET
#define OFFSET(x)
Definition: vf_extractplanes.c:51
extractplanes_inputs
static const AVFilterPad extractplanes_inputs[]
Definition: vf_extractplanes.c:408
internal.h
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AV_PIX_FMT_GRAY9BE
@ AV_PIX_FMT_GRAY9BE
Y , 9bpp, big-endian.
Definition: pixfmt.h:335
FLOAT_FORMATS
#define FLOAT_FORMATS(suf)
Definition: vf_extractplanes.c:125
AV_PIX_FMT_FLAG_BE
#define AV_PIX_FMT_FLAG_BE
Pixel format is big-endian.
Definition: pixdesc.h:116
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:55
AVFilter
Filter definition.
Definition: avfilter.h:161
AV_PIX_FMT_GRAY12BE
@ AV_PIX_FMT_GRAY12BE
Y , 12bpp, big-endian.
Definition: pixfmt.h:315
ret
ret
Definition: filter_design.txt:187
AVFilterPad::type
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:60
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
AV_PIX_FMT_GRAYF32BE
@ AV_PIX_FMT_GRAYF32BE
IEEE-754 single precision Y, 32bpp, big-endian.
Definition: pixfmt.h:360
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
avfilter.h
AV_PIX_FMT_FLAG_PLANAR
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:132
ff_outlink_get_status
int ff_outlink_get_status(AVFilterLink *link)
Get the status on an output link.
Definition: avfilter.c:1504
AVFilterContext
An instance of a filter.
Definition: avfilter.h:392
desc
const char * desc
Definition: libsvtav1.c:83
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_PIX_FMT_GRAY16LE
@ AV_PIX_FMT_GRAY16LE
Y , 16bpp, little-endian.
Definition: pixfmt.h:98
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
ExtractPlanesContext::depth
int depth
Definition: vf_extractplanes.c:47
PLANE_U
#define PLANE_U
Definition: vf_extractplanes.c:38
AV_PIX_FMT_GRAY14LE
@ AV_PIX_FMT_GRAY14LE
Y , 14bpp, little-endian.
Definition: pixfmt.h:358
ExtractPlanesContext::step
int step
Definition: vf_extractplanes.c:48
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:195
ff_append_outpad_free_name
int ff_append_outpad_free_name(AVFilterContext *f, AVFilterPad *p)
Definition: avfilter.c:142
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
AV_PIX_FMT_GRAY14BE
@ AV_PIX_FMT_GRAY14BE
Y , 14bpp, big-endian.
Definition: pixfmt.h:357
ff_fill_rgba_map
int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
Definition: drawutils.c:35
AV_OPT_TYPE_FLAGS
@ AV_OPT_TYPE_FLAGS
Definition: opt.h:224
imgutils.h
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
ff_outlink_frame_wanted
the definition of that something depends on the semantic of the filter The callback must examine the status of the filter s links and proceed accordingly The status of output links is stored in the status_in and status_out fields and tested by the ff_outlink_frame_wanted() function. If this function returns true
avstring.h
drawutils.h
HIGHDEPTH_FORMATS
#define HIGHDEPTH_FORMATS(suf)
Definition: vf_extractplanes.c:85
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_extractplanes.c:221
PLANE_V
#define PLANE_V
Definition: vf_extractplanes.c:39
PLANE_R
#define PLANE_R
Definition: vf_extractplanes.c:33
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(extractplanes)
EIGHTBIT_FORMATS
#define EIGHTBIT_FORMATS
Definition: vf_extractplanes.c:67
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_extractplanes.c:130
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