FFmpeg
vf_maskedclamp.c
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1 /*
2  * Copyright (c) 2016 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/imgutils.h"
22 #include "libavutil/pixdesc.h"
23 #include "libavutil/opt.h"
24 #include "avfilter.h"
25 #include "formats.h"
26 #include "internal.h"
27 #include "video.h"
28 #include "framesync.h"
29 #include "maskedclamp.h"
30 
31 #define OFFSET(x) offsetof(MaskedClampContext, x)
32 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
33 
34 typedef struct ThreadData {
35  AVFrame *b, *o, *m, *d;
36 } ThreadData;
37 
38 typedef struct MaskedClampContext {
39  const AVClass *class;
40 
41  int planes;
43  int overshoot;
44 
45  int linesize[4];
46  int width[4], height[4];
47  int nb_planes;
48  int depth;
50 
53 
54 static const AVOption maskedclamp_options[] = {
55  { "undershoot", "set undershoot", OFFSET(undershoot), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
56  { "overshoot", "set overshoot", OFFSET(overshoot), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
57  { "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
58  { NULL }
59 };
60 
61 AVFILTER_DEFINE_CLASS(maskedclamp);
62 
64 {
65  static const enum AVPixelFormat pix_fmts[] = {
85  };
86 
87  return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
88 }
89 
90 static int maskedclamp_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
91 {
92  MaskedClampContext *s = ctx->priv;
93  ThreadData *td = arg;
94  int p;
95 
96  for (p = 0; p < s->nb_planes; p++) {
97  const ptrdiff_t blinesize = td->b->linesize[p];
98  const ptrdiff_t brightlinesize = td->m->linesize[p];
99  const ptrdiff_t darklinesize = td->o->linesize[p];
100  const ptrdiff_t dlinesize = td->d->linesize[p];
101  const int w = s->width[p];
102  const int h = s->height[p];
103  const int slice_start = (h * jobnr) / nb_jobs;
104  const int slice_end = (h * (jobnr+1)) / nb_jobs;
105  const uint8_t *bsrc = td->b->data[p] + slice_start * blinesize;
106  const uint8_t *darksrc = td->o->data[p] + slice_start * darklinesize;
107  const uint8_t *brightsrc = td->m->data[p] + slice_start * brightlinesize;
108  uint8_t *dst = td->d->data[p] + slice_start * dlinesize;
109  const int undershoot = s->undershoot;
110  const int overshoot = s->overshoot;
111  int y;
112 
113  if (!((1 << p) & s->planes)) {
114  av_image_copy_plane(dst, dlinesize, bsrc, blinesize,
115  s->linesize[p], slice_end - slice_start);
116  continue;
117  }
118 
119  for (y = slice_start; y < slice_end; y++) {
120  s->dsp.maskedclamp(bsrc, dst, darksrc, brightsrc, w, undershoot, overshoot);
121 
122  dst += dlinesize;
123  bsrc += blinesize;
124  darksrc += darklinesize;
125  brightsrc += brightlinesize;
126  }
127  }
128 
129  return 0;
130 }
131 
133 {
134  AVFilterContext *ctx = fs->parent;
135  MaskedClampContext *s = fs->opaque;
136  AVFilterLink *outlink = ctx->outputs[0];
137  AVFrame *out, *base, *dark, *bright;
138  int ret;
139 
140  if ((ret = ff_framesync_get_frame(&s->fs, 0, &base, 0)) < 0 ||
141  (ret = ff_framesync_get_frame(&s->fs, 1, &dark, 0)) < 0 ||
142  (ret = ff_framesync_get_frame(&s->fs, 2, &bright, 0)) < 0)
143  return ret;
144 
145  if (ctx->is_disabled) {
146  out = av_frame_clone(base);
147  if (!out)
148  return AVERROR(ENOMEM);
149  } else {
150  ThreadData td;
151 
152  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
153  if (!out)
154  return AVERROR(ENOMEM);
155  av_frame_copy_props(out, base);
156 
157  td.b = base;
158  td.o = dark;
159  td.m = bright;
160  td.d = out;
161 
162  ctx->internal->execute(ctx, maskedclamp_slice, &td, NULL, FFMIN(s->height[0],
164  }
165  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
166 
167  return ff_filter_frame(outlink, out);
168 }
169 
170 #define MASKEDCLAMP(type, name) \
171 static void maskedclamp##name(const uint8_t *bbsrc, uint8_t *ddst, \
172  const uint8_t *ddarksrc, const uint8_t *bbrightsrc, \
173  int w, int undershoot, int overshoot) \
174 { \
175  const type *bsrc = (const type *)bbsrc; \
176  const type *darksrc = (const type *)ddarksrc; \
177  const type *brightsrc = (const type *)bbrightsrc; \
178  type *dst = (type *)ddst; \
179  \
180  for (int x = 0; x < w; x++) { \
181  if (bsrc[x] < darksrc[x] - undershoot) \
182  dst[x] = darksrc[x] - undershoot; \
183  else if (bsrc[x] > brightsrc[x] + overshoot) \
184  dst[x] = brightsrc[x] + overshoot; \
185  else \
186  dst[x] = bsrc[x]; \
187  } \
188 }
189 
191 MASKEDCLAMP(uint16_t, 16)
192 
194 {
195  AVFilterContext *ctx = inlink->dst;
196  MaskedClampContext *s = ctx->priv;
197  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
198  int vsub, hsub, ret;
199 
200  s->nb_planes = av_pix_fmt_count_planes(inlink->format);
201 
202  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
203  return ret;
204 
205  hsub = desc->log2_chroma_w;
206  vsub = desc->log2_chroma_h;
207  s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
208  s->height[0] = s->height[3] = inlink->h;
209  s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
210  s->width[0] = s->width[3] = inlink->w;
211 
212  s->depth = desc->comp[0].depth;
213  s->undershoot = FFMIN(s->undershoot, (1 << s->depth) - 1);
214  s->overshoot = FFMIN(s->overshoot, (1 << s->depth) - 1);
215 
216  if (s->depth <= 8)
217  s->dsp.maskedclamp = maskedclamp8;
218  else
219  s->dsp.maskedclamp = maskedclamp16;
220 
221  if (ARCH_X86)
223 
224  return 0;
225 }
226 
227 static int config_output(AVFilterLink *outlink)
228 {
229  AVFilterContext *ctx = outlink->src;
230  MaskedClampContext *s = ctx->priv;
231  AVFilterLink *base = ctx->inputs[0];
232  AVFilterLink *dark = ctx->inputs[1];
233  AVFilterLink *bright = ctx->inputs[2];
234  FFFrameSyncIn *in;
235  int ret;
236 
237  if (base->format != dark->format ||
238  base->format != bright->format) {
239  av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
240  return AVERROR(EINVAL);
241  }
242  if (base->w != dark->w || base->h != dark->h ||
243  base->w != bright->w || base->h != bright->h) {
244  av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
245  "(size %dx%d) do not match the corresponding "
246  "second input link %s parameters (%dx%d) "
247  "and/or third input link %s parameters (size %dx%d)\n",
248  ctx->input_pads[0].name, base->w, base->h,
249  ctx->input_pads[1].name, dark->w, dark->h,
250  ctx->input_pads[2].name, bright->w, bright->h);
251  return AVERROR(EINVAL);
252  }
253 
254  outlink->w = base->w;
255  outlink->h = base->h;
256  outlink->sample_aspect_ratio = base->sample_aspect_ratio;
257  outlink->frame_rate = base->frame_rate;
258 
259  if ((ret = ff_framesync_init(&s->fs, ctx, 3)) < 0)
260  return ret;
261 
262  in = s->fs.in;
263  in[0].time_base = base->time_base;
264  in[1].time_base = dark->time_base;
265  in[2].time_base = bright->time_base;
266  in[0].sync = 1;
267  in[0].before = EXT_STOP;
268  in[0].after = EXT_INFINITY;
269  in[1].sync = 1;
270  in[1].before = EXT_STOP;
271  in[1].after = EXT_INFINITY;
272  in[2].sync = 1;
273  in[2].before = EXT_STOP;
274  in[2].after = EXT_INFINITY;
275  s->fs.opaque = s;
277 
278  ret = ff_framesync_configure(&s->fs);
279  outlink->time_base = s->fs.time_base;
280 
281  return ret;
282 }
283 
285 {
286  MaskedClampContext *s = ctx->priv;
287  return ff_framesync_activate(&s->fs);
288 }
289 
291 {
292  MaskedClampContext *s = ctx->priv;
293 
294  ff_framesync_uninit(&s->fs);
295 }
296 
297 static const AVFilterPad maskedclamp_inputs[] = {
298  {
299  .name = "base",
300  .type = AVMEDIA_TYPE_VIDEO,
301  .config_props = config_input,
302  },
303  {
304  .name = "dark",
305  .type = AVMEDIA_TYPE_VIDEO,
306  },
307  {
308  .name = "bright",
309  .type = AVMEDIA_TYPE_VIDEO,
310  },
311  { NULL }
312 };
313 
315  {
316  .name = "default",
317  .type = AVMEDIA_TYPE_VIDEO,
318  .config_props = config_output,
319  },
320  { NULL }
321 };
322 
324  .name = "maskedclamp",
325  .description = NULL_IF_CONFIG_SMALL("Clamp first stream with second stream and third stream."),
326  .priv_size = sizeof(MaskedClampContext),
327  .uninit = uninit,
328  .activate = activate,
330  .inputs = maskedclamp_inputs,
331  .outputs = maskedclamp_outputs,
332  .priv_class = &maskedclamp_class,
334 };
#define NULL
Definition: coverity.c:32
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:430
AVFrame * out
Definition: af_adeclick.c:488
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:422
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2522
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
AVOption.
Definition: opt.h:246
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:424
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:397
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:407
static const AVFilterPad maskedclamp_outputs[]
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:425
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
misc image utilities
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2562
Main libavfilter public API header.
void ff_maskedclamp_init_x86(MaskedClampDSPContext *dsp, int depth)
static int config_output(AVFilterLink *outlink)
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:403
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:367
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:391
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:117
#define MASKEDCLAMP(type, name)
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
#define FLAGS
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:385
int64_t pts
Timestamp of the current event.
Definition: framesync.h:167
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
enum FFFrameSyncExtMode before
Extrapolation mode for timestamps before the first frame.
Definition: framesync.h:86
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:368
const char * name
Pad name.
Definition: internal.h:60
AVFilterContext * parent
Parent filter context.
Definition: framesync.h:152
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:369
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1093
void(* maskedclamp)(const uint8_t *bsrc, uint8_t *dst, const uint8_t *darksrc, const uint8_t *brightsrc, int w, int undershoot, int overshoot)
Definition: maskedclamp.h:28
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
#define av_cold
Definition: attributes.h:82
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:259
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:388
FFFrameSyncIn * in
Pointer to array of inputs.
Definition: framesync.h:203
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:421
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:402
int height
Definition: vf_avgblur.c:61
AVFrame * dst
Definition: vf_blend.c:55
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
Definition: pixfmt.h:100
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
int linesize
Definition: vf_avgblur.c:64
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:400
static const AVFilterPad maskedclamp_inputs[]
enum FFFrameSyncExtMode after
Extrapolation mode for timestamps after the last frame.
Definition: framesync.h:91
Input stream structure.
Definition: framesync.h:81
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:392
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:429
#define av_log(a,...)
#define OFFSET(x)
A filter pad used for either input or output.
Definition: internal.h:54
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
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:345
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:176
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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:569
#define td
Definition: regdef.h:70
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
void ff_framesync_uninit(FFFrameSync *fs)
Free all memory currently allocated.
Definition: framesync.c:293
Frame sync structure.
Definition: framesync.h:146
static const AVOption maskedclamp_options[]
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
void * priv
private data for use by the filter
Definition: avfilter.h:353
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:116
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:431
const char * arg
Definition: jacosubdec.c:66
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:408
AVRational time_base
Time base for the incoming frames.
Definition: framesync.h:96
int ff_framesync_activate(FFFrameSync *fs)
Examine the frames in the filter&#39;s input and try to produce output.
Definition: framesync.c:344
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:390
int(* on_event)(struct FFFrameSync *fs)
Callback called when a frame event is ready.
Definition: framesync.h:172
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:409
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
static const struct @321 planes[]
static int config_input(AVFilterLink *inlink)
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:385
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:406
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:802
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:371
#define FFMIN(a, b)
Definition: common.h:96
AVFrame * d
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
static int maskedclamp_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
#define AV_PIX_FMT_YUVA444P12
Definition: pixfmt.h:428
AVFrame * m
static av_cold void uninit(AVFilterContext *ctx)
AVFormatContext * ctx
Definition: movenc.c:48
AVRational time_base
Time base for the output events.
Definition: framesync.h:162
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:426
AVFilter ff_vf_maskedclamp
void * opaque
Opaque pointer, not used by the API.
Definition: framesync.h:177
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:386
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:405
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:540
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:398
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:395
Extend the frame to infinity.
Definition: framesync.h:75
Used for passing data between threads.
Definition: dsddec.c:64
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
Initialize a frame sync structure.
Definition: framesync.c:77
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:177
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
#define AV_PIX_FMT_GRAY14
Definition: pixfmt.h:370
MaskedClampDSPContext dsp
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 inputs
static int query_formats(AVFilterContext *ctx)
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:387
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
AVFILTER_DEFINE_CLASS(maskedclamp)
unsigned sync
Synchronization level: frames on input at the highest sync level will generate output frame events...
Definition: framesync.h:139
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
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
AVFrame * b
const char * name
Filter name.
Definition: avfilter.h:148
#define AV_PIX_FMT_YUV440P12
Definition: pixfmt.h:393
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:384
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
Definition: avfilter.h:133
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:396
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:404
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:378
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:388
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:394
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
AVFrame * base
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
Y , 8bpp.
Definition: pixfmt.h:74
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:215
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:423
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
avfilter_execute_func * execute
Definition: internal.h:155
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2036
Completely stop all streams with this one.
Definition: framesync.h:65
static int process_frame(FFFrameSync *fs)
const AVPixFmtDescriptor * desc
Definition: vf_tonemap.c:196
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:258
static int activate(AVFilterContext *ctx)
An instance of a filter.
Definition: avfilter.h:338
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
AVFrame * in
Definition: af_afftdn.c:1083
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:338
AVFilterLink * inlink
Definition: vf_blend.c:56
internal API functions
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
int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe, unsigned get)
Get the current frame in an input.
Definition: framesync.c:256
int depth
Number of bits in the component.
Definition: pixdesc.h:58
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:399
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654
AVFrame * o
#define AV_PIX_FMT_YUVA422P12
Definition: pixfmt.h:427
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58