FFmpeg
vf_maskedmerge.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/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 "maskedmerge.h"
29 
30 #define OFFSET(x) offsetof(MaskedMergeContext, x)
31 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
32 
33 static const AVOption maskedmerge_options[] = {
34  { "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
35  { NULL }
36 };
37 
38 AVFILTER_DEFINE_CLASS(maskedmerge);
39 
41 {
42  static const enum AVPixelFormat pix_fmts[] = {
61  };
62 
63  return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
64 }
65 
66 typedef struct ThreadData {
68  AVFrame *out;
69 } ThreadData;
70 
71 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
72 {
73  MaskedMergeContext *s = ctx->priv;
74  ThreadData *td = arg;
75  AVFrame *base = td->base;
76  AVFrame *overlay = td->overlay;
77  AVFrame *mask = td->mask;
78  AVFrame *out = td->out;
79  int p;
80 
81  for (p = 0; p < s->nb_planes; p++) {
82  const int h = s->height[p];
83  const int slice_start = (h * jobnr) / nb_jobs;
84  const int slice_end = (h * (jobnr+1)) / nb_jobs;
85 
86  if (!((1 << p) & s->planes)) {
87  av_image_copy_plane(out->data[p] + slice_start * out->linesize[p],
88  out->linesize[p],
89  base->data[p] + slice_start * base->linesize[p],
90  base->linesize[p],
91  s->linesize[p], slice_end - slice_start);
92  continue;
93  }
94 
95  s->maskedmerge(base->data[p] + slice_start * base->linesize[p],
96  overlay->data[p] + slice_start * overlay->linesize[p],
97  mask->data[p] + slice_start * mask->linesize[p],
98  out->data[p] + slice_start * out->linesize[p],
99  base->linesize[p], overlay->linesize[p],
100  mask->linesize[p], out->linesize[p],
101  s->width[p], slice_end - slice_start,
102  s->half, s->depth);
103  }
104 
105  return 0;
106 }
107 
109 {
110  AVFilterContext *ctx = fs->parent;
111  MaskedMergeContext *s = fs->opaque;
112  AVFilterLink *outlink = ctx->outputs[0];
113  AVFrame *out, *base, *overlay, *mask;
114  ThreadData td;
115  int ret;
116 
117  if ((ret = ff_framesync_get_frame(&s->fs, 0, &base, 0)) < 0 ||
118  (ret = ff_framesync_get_frame(&s->fs, 1, &overlay, 0)) < 0 ||
119  (ret = ff_framesync_get_frame(&s->fs, 2, &mask, 0)) < 0)
120  return ret;
121 
122  if (ctx->is_disabled) {
123  out = av_frame_clone(base);
124  if (!out)
125  return AVERROR(ENOMEM);
126  } else {
127  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
128  if (!out)
129  return AVERROR(ENOMEM);
130  av_frame_copy_props(out, base);
131 
132  td.out = out;
133  td.base = base;
134  td.overlay = overlay;
135  td.mask = mask;
136  ctx->internal->execute(ctx, filter_slice, &td, NULL,
137  FFMIN(s->height[2], ff_filter_get_nb_threads(ctx)));
138  }
139  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
140 
141  return ff_filter_frame(outlink, out);
142 }
143 
144 static void maskedmerge8(const uint8_t *bsrc, const uint8_t *osrc,
145  const uint8_t *msrc, uint8_t *dst,
146  ptrdiff_t blinesize, ptrdiff_t olinesize,
147  ptrdiff_t mlinesize, ptrdiff_t dlinesize,
148  int w, int h,
149  int half, int shift)
150 {
151  int x, y;
152 
153  for (y = 0; y < h; y++) {
154  for (x = 0; x < w; x++) {
155  dst[x] = bsrc[x] + ((msrc[x] * (osrc[x] - bsrc[x]) + 128) >> 8);
156  }
157 
158  dst += dlinesize;
159  bsrc += blinesize;
160  osrc += olinesize;
161  msrc += mlinesize;
162  }
163 }
164 
165 static void maskedmerge16(const uint8_t *bbsrc, const uint8_t *oosrc,
166  const uint8_t *mmsrc, uint8_t *ddst,
167  ptrdiff_t blinesize, ptrdiff_t olinesize,
168  ptrdiff_t mlinesize, ptrdiff_t dlinesize,
169  int w, int h,
170  int half, int shift)
171 {
172  const uint16_t *bsrc = (const uint16_t *)bbsrc;
173  const uint16_t *osrc = (const uint16_t *)oosrc;
174  const uint16_t *msrc = (const uint16_t *)mmsrc;
175  uint16_t *dst = (uint16_t *)ddst;
176  int x, y;
177 
178  for (y = 0; y < h; y++) {
179  for (x = 0; x < w; x++) {
180  dst[x] = bsrc[x] + ((msrc[x] * (osrc[x] - bsrc[x]) + half) >> shift);
181  }
182 
183  dst += dlinesize / 2;
184  bsrc += blinesize / 2;
185  osrc += olinesize / 2;
186  msrc += mlinesize / 2;
187  }
188 }
189 
191 {
192  AVFilterContext *ctx = inlink->dst;
193  MaskedMergeContext *s = ctx->priv;
195  int vsub, hsub;
196 
198 
199  hsub = desc->log2_chroma_w;
200  vsub = desc->log2_chroma_h;
201  s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
202  s->height[0] = s->height[3] = inlink->h;
203  s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
204  s->width[0] = s->width[3] = inlink->w;
205 
206  s->depth = desc->comp[0].depth;
207  s->half = (1 << s->depth) / 2;
208 
209  if (desc->comp[0].depth == 8)
211  else
213 
214  if (ARCH_X86)
216 
217  return 0;
218 }
219 
220 static int config_output(AVFilterLink *outlink)
221 {
222  AVFilterContext *ctx = outlink->src;
223  MaskedMergeContext *s = ctx->priv;
224  AVFilterLink *base = ctx->inputs[0];
225  AVFilterLink *overlay = ctx->inputs[1];
226  AVFilterLink *mask = ctx->inputs[2];
227  FFFrameSyncIn *in;
228  int ret;
229 
230  if (base->format != overlay->format ||
231  base->format != mask->format) {
232  av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
233  return AVERROR(EINVAL);
234  }
235  if (base->w != overlay->w || base->h != overlay->h ||
236  base->w != mask->w || base->h != mask->h) {
237  av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
238  "(size %dx%d) do not match the corresponding "
239  "second input link %s parameters (size %dx%d) "
240  "and/or third input link %s parameters (size %dx%d)\n",
241  ctx->input_pads[0].name, base->w, base->h,
242  ctx->input_pads[1].name, overlay->w, overlay->h,
243  ctx->input_pads[2].name, mask->w, mask->h);
244  return AVERROR(EINVAL);
245  }
246 
247  outlink->w = base->w;
248  outlink->h = base->h;
249  outlink->sample_aspect_ratio = base->sample_aspect_ratio;
250  outlink->frame_rate = base->frame_rate;
251 
252  if ((ret = av_image_fill_linesizes(s->linesize, outlink->format, outlink->w)) < 0)
253  return ret;
254 
255  if ((ret = ff_framesync_init(&s->fs, ctx, 3)) < 0)
256  return ret;
257 
258  in = s->fs.in;
259  in[0].time_base = base->time_base;
260  in[1].time_base = overlay->time_base;
261  in[2].time_base = mask->time_base;
262  in[0].sync = 1;
263  in[0].before = EXT_STOP;
264  in[0].after = EXT_INFINITY;
265  in[1].sync = 1;
266  in[1].before = EXT_STOP;
267  in[1].after = EXT_INFINITY;
268  in[2].sync = 1;
269  in[2].before = EXT_STOP;
270  in[2].after = EXT_INFINITY;
271  s->fs.opaque = s;
273 
274  ret = ff_framesync_configure(&s->fs);
275  outlink->time_base = s->fs.time_base;
276 
277  return ret;
278 }
279 
281 {
282  MaskedMergeContext *s = ctx->priv;
283  return ff_framesync_activate(&s->fs);
284 }
285 
287 {
288  MaskedMergeContext *s = ctx->priv;
289 
290  ff_framesync_uninit(&s->fs);
291 }
292 
293 static const AVFilterPad maskedmerge_inputs[] = {
294  {
295  .name = "base",
296  .type = AVMEDIA_TYPE_VIDEO,
297  .config_props = config_input,
298  },
299  {
300  .name = "overlay",
301  .type = AVMEDIA_TYPE_VIDEO,
302  },
303  {
304  .name = "mask",
305  .type = AVMEDIA_TYPE_VIDEO,
306  },
307  { NULL }
308 };
309 
311  {
312  .name = "default",
313  .type = AVMEDIA_TYPE_VIDEO,
314  .config_props = config_output,
315  },
316  { NULL }
317 };
318 
320  .name = "maskedmerge",
321  .description = NULL_IF_CONFIG_SMALL("Merge first stream with second stream using third stream as mask."),
322  .priv_size = sizeof(MaskedMergeContext),
323  .uninit = uninit,
325  .activate = activate,
326  .inputs = maskedmerge_inputs,
327  .outputs = maskedmerge_outputs,
328  .priv_class = &maskedmerge_class,
330 };
#define NULL
Definition: coverity.c:32
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:430
AVFrame * out
Definition: af_adeclick.c:488
static int shift(int a, int b)
Definition: sonic.c:82
#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
#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.
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
void ff_maskedmerge_init_x86(MaskedMergeContext *s)
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:403
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:367
static void maskedmerge16(const uint8_t *bbsrc, const uint8_t *oosrc, const uint8_t *mmsrc, uint8_t *ddst, ptrdiff_t blinesize, ptrdiff_t olinesize, ptrdiff_t mlinesize, ptrdiff_t dlinesize, int w, int h, int half, int shift)
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:391
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:117
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
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
static void maskedmerge8(const uint8_t *bsrc, const uint8_t *osrc, const uint8_t *msrc, uint8_t *dst, ptrdiff_t blinesize, ptrdiff_t olinesize, ptrdiff_t mlinesize, ptrdiff_t dlinesize, int w, int h, int half, int shift)
#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
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
static const AVFilterPad maskedmerge_outputs[]
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.
AVFILTER_DEFINE_CLASS(maskedmerge)
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
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
static int query_formats(AVFilterContext *ctx)
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:400
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 FLAGS
#define av_log(a,...)
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
#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[]
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:385
void(* maskedmerge)(const uint8_t *bsrc, const uint8_t *osrc, const uint8_t *msrc, uint8_t *dst, ptrdiff_t blinesize, ptrdiff_t olinesize, ptrdiff_t mlinesize, ptrdiff_t dlinesize, int w, int h, int half, int shift)
Definition: maskedmerge.h:36
#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
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
#define OFFSET(x)
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
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
static int process_frame(FFFrameSync *fs)
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:398
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:395
static int config_input(AVFilterLink *inlink)
Extend the frame to infinity.
Definition: framesync.h:75
static const AVFilterPad maskedmerge_inputs[]
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
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
#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
unsigned sync
Synchronization level: frames on input at the highest sync level will generate output frame events...
Definition: framesync.h:139
Filter definition.
Definition: avfilter.h:144
AVFrame * mask
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
static int activate(AVFilterContext *ctx)
static const AVOption maskedmerge_options[]
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
AVFrame * overlay
#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
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static int config_output(AVFilterLink *outlink)
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
static av_cold void uninit(AVFilterContext *ctx)
#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
FFFrameSync fs
Definition: maskedmerge.h:34
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
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
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:1082
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
AVFilter ff_vf_maskedmerge
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58