FFmpeg
vf_hysteresis.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2013 Oka Motofumi (chikuzen.mo at gmail dot com)
3  * Copyright (c) 2016 Paul B Mahol
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/imgutils.h"
23 #include "libavutil/pixdesc.h"
24 #include "libavutil/opt.h"
25 #include "avfilter.h"
26 #include "formats.h"
27 #include "internal.h"
28 #include "video.h"
29 #include "framesync.h"
30 
31 #define OFFSET(x) offsetof(HysteresisContext, x)
32 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
33 
34 typedef struct HysteresisContext {
35  const AVClass *class;
37 
38  int planes;
39  int threshold;
40 
41  int width[4], height[4];
42  int nb_planes;
43  int depth;
44 
46  uint32_t *xy;
47  int index;
48 
49  void (*hysteresis)(struct HysteresisContext *s, const uint8_t *bsrc, const uint8_t *osrc, uint8_t *dst,
50  ptrdiff_t blinesize, ptrdiff_t olinesize,
51  ptrdiff_t destlinesize,
52  int w, int h);
54 
55 static const AVOption hysteresis_options[] = {
56  { "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
57  { "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_INT, {.i64=0}, 0, UINT16_MAX, FLAGS },
58  { NULL }
59 };
60 
62 {
63  static const enum AVPixelFormat pix_fmts[] = {
82  };
83 
84  return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
85 }
86 
88 {
89  AVFilterContext *ctx = fs->parent;
90  HysteresisContext *s = fs->opaque;
91  AVFilterLink *outlink = ctx->outputs[0];
92  AVFrame *out, *base, *alt;
93  int ret;
94 
95  if ((ret = ff_framesync_get_frame(&s->fs, 0, &base, 0)) < 0 ||
96  (ret = ff_framesync_get_frame(&s->fs, 1, &alt, 0)) < 0)
97  return ret;
98 
99  if (ctx->is_disabled) {
100  out = av_frame_clone(base);
101  if (!out)
102  return AVERROR(ENOMEM);
103  } else {
104  int p;
105 
106  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
107  if (!out)
108  return AVERROR(ENOMEM);
109  av_frame_copy_props(out, base);
110 
111  for (p = 0; p < s->nb_planes; p++) {
112  if (!((1 << p) & s->planes)) {
113  av_image_copy_plane(out->data[p], out->linesize[p], base->data[p], base->linesize[p],
114  s->width[p], s->height[p]);
115  continue;
116  } else {
117  int y;
118 
119  for (y = 0; y < s->height[p]; y++) {
120  memset(out->data[p] + y * out->linesize[p], 0, s->width[p]);
121  }
122  }
123 
124  s->index = -1;
125  memset(s->map, 0, s->width[0] * s->height[0]);
126  memset(s->xy, 0, s->width[0] * s->height[0] * 4);
127 
128  s->hysteresis(s, base->data[p], alt->data[p],
129  out->data[p],
130  base->linesize[p], alt->linesize[p],
131  out->linesize[p],
132  s->width[p], s->height[p]);
133  }
134  }
135  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
136 
137  return ff_filter_frame(outlink, out);
138 }
139 
140 static int passed(HysteresisContext *s, int x, int y, int w)
141 {
142  return s->map[x + y * w];
143 }
144 
145 static void push(HysteresisContext *s, int x, int y, int w)
146 {
147  s->map[x + y * w] = 0xff;
148  s->xy[++s->index] = (uint16_t)(x) << 16 | (uint16_t)y;
149 }
150 
151 static void pop(HysteresisContext *s, int *x, int *y)
152 {
153  uint32_t val = s->xy[s->index--];
154 
155  *x = val >> 16;
156  *y = val & 0x0000FFFF;
157 }
158 
160 {
161  return s->index < 0;
162 }
163 
164 static void hysteresis8(HysteresisContext *s, const uint8_t *bsrc, const uint8_t *asrc,
165  uint8_t *dst,
166  ptrdiff_t blinesize, ptrdiff_t alinesize,
167  ptrdiff_t dlinesize,
168  int w, int h)
169 {
170  const int t = s->threshold;
171  int x, y;
172 
173  for (y = 0; y < h; y++) {
174  for (x = 0; x < w; x++) {
175  if ((bsrc[x + y * blinesize] > t) && (asrc[x + y * alinesize] > t) && !passed(s, x, y, w)) {
176  int posx, posy;
177 
178  dst[x + y * dlinesize] = asrc[x + y * alinesize];
179 
180  push(s, x, y, w);
181 
182  while (!is_empty(s)) {
183  int x_min, x_max, y_min, y_max, yy, xx;
184 
185  pop(s, &posx, &posy);
186 
187  x_min = posx > 0 ? posx - 1 : 0;
188  x_max = posx < w - 1 ? posx + 1 : posx;
189  y_min = posy > 0 ? posy - 1 : 0;
190  y_max = posy < h - 1 ? posy + 1 : posy;
191 
192  for (yy = y_min; yy <= y_max; yy++) {
193  for (xx = x_min; xx <= x_max; xx++) {
194  if ((asrc[xx + yy * alinesize] > t) && !passed(s, xx, yy, w)) {
195  dst[xx + yy * dlinesize] = asrc[xx + yy * alinesize];
196  push(s, xx, yy, w);
197  }
198  }
199  }
200  }
201  }
202  }
203  }
204 }
205 
206 static void hysteresis16(HysteresisContext *s, const uint8_t *bbsrc, const uint8_t *aasrc,
207  uint8_t *ddst,
208  ptrdiff_t blinesize, ptrdiff_t alinesize,
209  ptrdiff_t dlinesize,
210  int w, int h)
211 {
212  const uint16_t *bsrc = (const uint16_t *)bbsrc;
213  const uint16_t *asrc = (const uint16_t *)aasrc;
214  uint16_t *dst = (uint16_t *)ddst;
215  const int t = s->threshold;
216  int x, y;
217 
218  blinesize /= 2;
219  alinesize /= 2;
220  dlinesize /= 2;
221 
222  for (y = 0; y < h; y++) {
223  for (x = 0; x < w; x++) {
224  if ((bsrc[x + y * blinesize] > t) && (asrc[x + y * alinesize] > t) && !passed(s, x, y, w)) {
225  int posx, posy;
226 
227  dst[x + y * dlinesize] = asrc[x + y * alinesize];
228 
229  push(s, x, y, w);
230 
231  while (!is_empty(s)) {
232  int x_min, x_max, y_min, y_max, yy, xx;
233 
234  pop(s, &posx, &posy);
235 
236  x_min = posx > 0 ? posx - 1 : 0;
237  x_max = posx < w - 1 ? posx + 1 : posx;
238  y_min = posy > 0 ? posy - 1 : 0;
239  y_max = posy < h - 1 ? posy + 1 : posy;
240 
241  for (yy = y_min; yy <= y_max; yy++) {
242  for (xx = x_min; xx <= x_max; xx++) {
243  if ((asrc[xx + yy * alinesize] > t) && !passed(s, xx, yy, w)) {
244  dst[xx + yy * dlinesize] = asrc[xx + yy * alinesize];
245  push(s, xx, yy, w);
246  }
247  }
248  }
249  }
250  }
251  }
252  }
253 }
254 
256 {
257  AVFilterContext *ctx = inlink->dst;
258  HysteresisContext *s = ctx->priv;
260  int vsub, hsub;
261 
263 
264  hsub = desc->log2_chroma_w;
265  vsub = desc->log2_chroma_h;
266  s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
267  s->height[0] = s->height[3] = inlink->h;
268  s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
269  s->width[0] = s->width[3] = inlink->w;
270 
271  s->depth = desc->comp[0].depth;
272 
273  if (desc->comp[0].depth == 8)
274  s->hysteresis = hysteresis8;
275  else
277 
278  s->map = av_calloc(inlink->w, inlink->h * sizeof (*s->map));
279  if (!s->map)
280  return AVERROR(ENOMEM);
281 
282  s->xy = av_calloc(inlink->w, inlink->h * sizeof(*s->xy));
283  if (!s->xy)
284  return AVERROR(ENOMEM);
285 
286  return 0;
287 }
288 
289 static int config_output(AVFilterLink *outlink)
290 {
291  AVFilterContext *ctx = outlink->src;
292  HysteresisContext *s = ctx->priv;
293  AVFilterLink *base = ctx->inputs[0];
294  AVFilterLink *alt = ctx->inputs[1];
295  FFFrameSyncIn *in;
296  int ret;
297 
298  if (base->format != alt->format) {
299  av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
300  return AVERROR(EINVAL);
301  }
302  if (base->w != alt->w || base->h != alt->h) {
303  av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
304  "(size %dx%d) do not match the corresponding "
305  "second input link %s parameters (size %dx%d)\n",
306  ctx->input_pads[0].name, base->w, base->h,
307  ctx->input_pads[1].name,
308  alt->w, alt->h);
309  return AVERROR(EINVAL);
310  }
311 
312  outlink->w = base->w;
313  outlink->h = base->h;
314  outlink->sample_aspect_ratio = base->sample_aspect_ratio;
315  outlink->frame_rate = base->frame_rate;
316 
317  if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
318  return ret;
319 
320  in = s->fs.in;
321  in[0].time_base = base->time_base;
322  in[1].time_base = alt->time_base;
323  in[0].sync = 1;
324  in[0].before = EXT_STOP;
325  in[0].after = EXT_INFINITY;
326  in[1].sync = 1;
327  in[1].before = EXT_STOP;
328  in[1].after = EXT_INFINITY;
329  s->fs.opaque = s;
331 
332  ret = ff_framesync_configure(&s->fs);
333  outlink->time_base = s->fs.time_base;
334 
335  return ret;
336 }
337 
339 {
340  HysteresisContext *s = ctx->priv;
341  return ff_framesync_activate(&s->fs);
342 }
343 
345 {
346  HysteresisContext *s = ctx->priv;
347 
348  ff_framesync_uninit(&s->fs);
349  av_freep(&s->map);
350  av_freep(&s->xy);
351 }
352 
354 
355 static const AVFilterPad hysteresis_inputs[] = {
356  {
357  .name = "base",
358  .type = AVMEDIA_TYPE_VIDEO,
359  .config_props = config_input,
360  },
361  {
362  .name = "alt",
363  .type = AVMEDIA_TYPE_VIDEO,
364  },
365  { NULL }
366 };
367 
368 static const AVFilterPad hysteresis_outputs[] = {
369  {
370  .name = "default",
371  .type = AVMEDIA_TYPE_VIDEO,
372  .config_props = config_output,
373  },
374  { NULL }
375 };
376 
378  .name = "hysteresis",
379  .description = NULL_IF_CONFIG_SMALL("Grow first stream into second stream by connecting components."),
380  .preinit = hysteresis_framesync_preinit,
381  .priv_size = sizeof(HysteresisContext),
382  .uninit = uninit,
384  .activate = activate,
385  .inputs = hysteresis_inputs,
386  .outputs = hysteresis_outputs,
387  .priv_class = &hysteresis_class,
389 };
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:863
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:430
#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.
#define OFFSET(x)
Definition: vf_hysteresis.c:31
const char * desc
Definition: nvenc.c:68
void(* hysteresis)(struct HysteresisContext *s, const uint8_t *bsrc, const uint8_t *osrc, uint8_t *dst, ptrdiff_t blinesize, ptrdiff_t olinesize, ptrdiff_t destlinesize, int w, int h)
Definition: vf_hysteresis.c:49
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
static int process_frame(FFFrameSync *fs)
Definition: vf_hysteresis.c:87
#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
uint8_t base
Definition: vp3data.h:202
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:244
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
FFFrameSync fs
Definition: vf_hysteresis.c:36
static void hysteresis16(HysteresisContext *s, const uint8_t *bbsrc, const uint8_t *aasrc, uint8_t *ddst, ptrdiff_t blinesize, ptrdiff_t alinesize, ptrdiff_t dlinesize, int w, int h)
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
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
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
static int passed(HysteresisContext *s, int x, int y, int w)
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
#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 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
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 AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:431
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:408
FRAMESYNC_DEFINE_CLASS(hysteresis, HysteresisContext, fs)
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
static int query_formats(AVFilterContext *ctx)
Definition: vf_hysteresis.c:61
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:385
AVFilter ff_vf_hysteresis
static int activate(AVFilterContext *ctx)
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:406
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:371
#define FLAGS
Definition: vf_hysteresis.c:32
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
uint8_t w
Definition: llviddspenc.c:38
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
AVFormatContext * ctx
Definition: movenc.c:48
AVRational time_base
Time base for the output events.
Definition: framesync.h:162
#define s(width, name)
Definition: cbs_vp9.c:257
#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
#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
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
static int config_output(AVFilterLink *outlink)
static int is_empty(HysteresisContext *s)
static void hysteresis8(HysteresisContext *s, const uint8_t *bsrc, const uint8_t *asrc, uint8_t *dst, ptrdiff_t blinesize, ptrdiff_t alinesize, ptrdiff_t dlinesize, int w, int h)
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
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
#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
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
static const AVOption hysteresis_options[]
Definition: vf_hysteresis.c:55
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
static void pop(HysteresisContext *s, int *x, int *y)
#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
static av_cold void uninit(AVFilterContext *ctx)
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:404
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#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
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
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
Completely stop all streams with this one.
Definition: framesync.h:65
static void push(HysteresisContext *s, int x, int y, int w)
static const AVFilterPad hysteresis_outputs[]
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
static int config_input(AVFilterLink *inlink)
FILE * out
Definition: movenc.c:54
#define av_freep(p)
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
static const AVFilterPad hysteresis_inputs[]
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
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
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58