FFmpeg
vf_remap.c
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1 /*
2  * Copyright (c) 2016 Floris Sluiter
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 /**
22  * @file
23  * Pixel remap filter
24  * This filter copies pixel by pixel a source frame to a target frame.
25  * It remaps the pixels to a new x,y destination based on two files ymap/xmap.
26  * Map files are passed as a parameter and are in PGM format (P2 or P5),
27  * where the values are y(rows)/x(cols) coordinates of the source_frame.
28  * The *target* frame dimension is based on mapfile dimensions: specified in the
29  * header of the mapfile and reflected in the number of datavalues.
30  * Dimensions of ymap and xmap must be equal. Datavalues must be positive or zero.
31  * Any datavalue in the ymap or xmap which value is higher
32  * then the *source* frame height or width is silently ignored, leaving a
33  * blank/chromakey pixel. This can safely be used as a feature to create overlays.
34  *
35  * Algorithm digest:
36  * Target_frame[y][x] = Source_frame[ ymap[y][x] ][ [xmap[y][x] ];
37  */
38 
39 #include "libavutil/imgutils.h"
40 #include "libavutil/pixdesc.h"
41 #include "libavutil/opt.h"
42 #include "avfilter.h"
43 #include "formats.h"
44 #include "framesync.h"
45 #include "internal.h"
46 #include "video.h"
47 
48 typedef struct RemapContext {
49  const AVClass *class;
50  int format;
51 
52  int nb_planes;
54  int step;
55 
57 
58  int (*remap_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
59 } RemapContext;
60 
61 #define OFFSET(x) offsetof(RemapContext, x)
62 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
63 
64 static const AVOption remap_options[] = {
65  { "format", "set output format", OFFSET(format), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "format" },
66  { "color", "", 0, AV_OPT_TYPE_CONST, {.i64=0}, .flags = FLAGS, .unit = "format" },
67  { "gray", "", 0, AV_OPT_TYPE_CONST, {.i64=1}, .flags = FLAGS, .unit = "format" },
68  { NULL }
69 };
70 
72 
73 typedef struct ThreadData {
74  AVFrame *in, *xin, *yin, *out;
75  int nb_planes;
77  int step;
78 } ThreadData;
79 
81 {
82  RemapContext *s = ctx->priv;
83  static const enum AVPixelFormat pix_fmts[] = {
99  };
100  static const enum AVPixelFormat gray_pix_fmts[] = {
104  AV_PIX_FMT_NONE
105  };
106  static const enum AVPixelFormat map_fmts[] = {
108  AV_PIX_FMT_NONE
109  };
110  AVFilterFormats *pix_formats = NULL, *map_formats = NULL;
111  int ret;
112 
113  if (!(pix_formats = ff_make_format_list(s->format ? gray_pix_fmts : pix_fmts)) ||
114  !(map_formats = ff_make_format_list(map_fmts))) {
115  ret = AVERROR(ENOMEM);
116  goto fail;
117  }
118  if ((ret = ff_formats_ref(pix_formats, &ctx->inputs[0]->out_formats)) < 0 ||
119  (ret = ff_formats_ref(map_formats, &ctx->inputs[1]->out_formats)) < 0 ||
120  (ret = ff_formats_ref(map_formats, &ctx->inputs[2]->out_formats)) < 0 ||
121  (ret = ff_formats_ref(pix_formats, &ctx->outputs[0]->in_formats)) < 0)
122  goto fail;
123  return 0;
124 fail:
125  if (pix_formats)
126  av_freep(&pix_formats->formats);
127  av_freep(&pix_formats);
128  if (map_formats)
129  av_freep(&map_formats->formats);
130  av_freep(&map_formats);
131  return ret;
132 }
133 
134 /**
135  * remap_planar algorithm expects planes of same size
136  * pixels are copied from source to target using :
137  * Target_frame[y][x] = Source_frame[ ymap[y][x] ][ [xmap[y][x] ];
138  */
139 #define DEFINE_REMAP_PLANAR_FUNC(name, bits, div) \
140 static int remap_planar##bits##_##name##_slice(AVFilterContext *ctx, void *arg, \
141  int jobnr, int nb_jobs) \
142 { \
143  const ThreadData *td = arg; \
144  const AVFrame *in = td->in; \
145  const AVFrame *xin = td->xin; \
146  const AVFrame *yin = td->yin; \
147  const AVFrame *out = td->out; \
148  const int slice_start = (out->height * jobnr ) / nb_jobs; \
149  const int slice_end = (out->height * (jobnr+1)) / nb_jobs; \
150  const int xlinesize = xin->linesize[0] / 2; \
151  const int ylinesize = yin->linesize[0] / 2; \
152  int x , y, plane; \
153  \
154  for (plane = 0; plane < td->nb_planes ; plane++) { \
155  const int dlinesize = out->linesize[plane] / div; \
156  const uint##bits##_t *src = (const uint##bits##_t *)in->data[plane]; \
157  uint##bits##_t *dst = (uint##bits##_t *)out->data[plane] + slice_start * dlinesize; \
158  const int slinesize = in->linesize[plane] / div; \
159  const uint16_t *xmap = (const uint16_t *)xin->data[0] + slice_start * xlinesize; \
160  const uint16_t *ymap = (const uint16_t *)yin->data[0] + slice_start * ylinesize; \
161  \
162  for (y = slice_start; y < slice_end; y++) { \
163  for (x = 0; x < out->width; x++) { \
164  if (ymap[x] < in->height && xmap[x] < in->width) { \
165  dst[x] = src[ymap[x] * slinesize + xmap[x]]; \
166  } else { \
167  dst[x] = 0; \
168  } \
169  } \
170  dst += dlinesize; \
171  xmap += xlinesize; \
172  ymap += ylinesize; \
173  } \
174  } \
175  \
176  return 0; \
177 }
178 
179 DEFINE_REMAP_PLANAR_FUNC(nearest, 8, 1)
180 DEFINE_REMAP_PLANAR_FUNC(nearest, 16, 2)
181 
182 /**
183  * remap_packed algorithm expects pixels with both padded bits (step) and
184  * number of components correctly set.
185  * pixels are copied from source to target using :
186  * Target_frame[y][x] = Source_frame[ ymap[y][x] ][ [xmap[y][x] ];
187  */
188 #define DEFINE_REMAP_PACKED_FUNC(name, bits, div) \
189 static int remap_packed##bits##_##name##_slice(AVFilterContext *ctx, void *arg, \
190  int jobnr, int nb_jobs) \
191 { \
192  const ThreadData *td = arg; \
193  const AVFrame *in = td->in; \
194  const AVFrame *xin = td->xin; \
195  const AVFrame *yin = td->yin; \
196  const AVFrame *out = td->out; \
197  const int slice_start = (out->height * jobnr ) / nb_jobs; \
198  const int slice_end = (out->height * (jobnr+1)) / nb_jobs; \
199  const int dlinesize = out->linesize[0] / div; \
200  const int slinesize = in->linesize[0] / div; \
201  const int xlinesize = xin->linesize[0] / 2; \
202  const int ylinesize = yin->linesize[0] / 2; \
203  const uint##bits##_t *src = (const uint##bits##_t *)in->data[0]; \
204  uint##bits##_t *dst = (uint##bits##_t *)out->data[0] + slice_start * dlinesize; \
205  const uint16_t *xmap = (const uint16_t *)xin->data[0] + slice_start * xlinesize; \
206  const uint16_t *ymap = (const uint16_t *)yin->data[0] + slice_start * ylinesize; \
207  const int step = td->step / div; \
208  int c, x, y; \
209  \
210  for (y = slice_start; y < slice_end; y++) { \
211  for (x = 0; x < out->width; x++) { \
212  for (c = 0; c < td->nb_components; c++) { \
213  if (ymap[x] < in->height && xmap[x] < in->width) { \
214  dst[x * step + c] = src[ymap[x] * slinesize + xmap[x] * step + c]; \
215  } else { \
216  dst[x * step + c] = 0; \
217  } \
218  } \
219  } \
220  dst += dlinesize; \
221  xmap += xlinesize; \
222  ymap += ylinesize; \
223  } \
224  \
225  return 0; \
226 }
227 
228 DEFINE_REMAP_PACKED_FUNC(nearest, 8, 1)
229 DEFINE_REMAP_PACKED_FUNC(nearest, 16, 2)
230 
232 {
233  AVFilterContext *ctx = inlink->dst;
234  RemapContext *s = ctx->priv;
235  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
236 
237  s->nb_planes = av_pix_fmt_count_planes(inlink->format);
238  s->nb_components = desc->nb_components;
239 
240  if (desc->comp[0].depth == 8) {
241  if (s->nb_planes > 1 || s->nb_components == 1) {
242  s->remap_slice = remap_planar8_nearest_slice;
243  } else {
244  s->remap_slice = remap_packed8_nearest_slice;
245  }
246  } else {
247  if (s->nb_planes > 1 || s->nb_components == 1) {
248  s->remap_slice = remap_planar16_nearest_slice;
249  } else {
250  s->remap_slice = remap_packed16_nearest_slice;
251  }
252  }
253 
254  s->step = av_get_padded_bits_per_pixel(desc) >> 3;
255  return 0;
256 }
257 
259 {
260  AVFilterContext *ctx = fs->parent;
261  RemapContext *s = fs->opaque;
262  AVFilterLink *outlink = ctx->outputs[0];
263  AVFrame *out, *in, *xpic, *ypic;
264  int ret;
265 
266  if ((ret = ff_framesync_get_frame(&s->fs, 0, &in, 0)) < 0 ||
267  (ret = ff_framesync_get_frame(&s->fs, 1, &xpic, 0)) < 0 ||
268  (ret = ff_framesync_get_frame(&s->fs, 2, &ypic, 0)) < 0)
269  return ret;
270 
271  if (ctx->is_disabled) {
272  out = av_frame_clone(in);
273  if (!out)
274  return AVERROR(ENOMEM);
275  } else {
276  ThreadData td;
277 
278  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
279  if (!out)
280  return AVERROR(ENOMEM);
281  av_frame_copy_props(out, in);
282 
283  td.in = in;
284  td.xin = xpic;
285  td.yin = ypic;
286  td.out = out;
287  td.nb_planes = s->nb_planes;
289  td.step = s->step;
290  ctx->internal->execute(ctx, s->remap_slice, &td, NULL, FFMIN(outlink->h, ff_filter_get_nb_threads(ctx)));
291  }
292  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
293 
294  return ff_filter_frame(outlink, out);
295 }
296 
297 static int config_output(AVFilterLink *outlink)
298 {
299  AVFilterContext *ctx = outlink->src;
300  RemapContext *s = ctx->priv;
301  AVFilterLink *srclink = ctx->inputs[0];
302  AVFilterLink *xlink = ctx->inputs[1];
303  AVFilterLink *ylink = ctx->inputs[2];
304  FFFrameSyncIn *in;
305  int ret;
306 
307  if (xlink->w != ylink->w || xlink->h != ylink->h) {
308  av_log(ctx, AV_LOG_ERROR, "Second input link %s parameters "
309  "(size %dx%d) do not match the corresponding "
310  "third input link %s parameters (%dx%d)\n",
311  ctx->input_pads[1].name, xlink->w, xlink->h,
312  ctx->input_pads[2].name, ylink->w, ylink->h);
313  return AVERROR(EINVAL);
314  }
315 
316  outlink->w = xlink->w;
317  outlink->h = xlink->h;
318  outlink->sample_aspect_ratio = srclink->sample_aspect_ratio;
319  outlink->frame_rate = srclink->frame_rate;
320 
321  ret = ff_framesync_init(&s->fs, ctx, 3);
322  if (ret < 0)
323  return ret;
324 
325  in = s->fs.in;
326  in[0].time_base = srclink->time_base;
327  in[1].time_base = xlink->time_base;
328  in[2].time_base = ylink->time_base;
329  in[0].sync = 2;
330  in[0].before = EXT_STOP;
331  in[0].after = EXT_STOP;
332  in[1].sync = 1;
333  in[1].before = EXT_NULL;
334  in[1].after = EXT_INFINITY;
335  in[2].sync = 1;
336  in[2].before = EXT_NULL;
337  in[2].after = EXT_INFINITY;
338  s->fs.opaque = s;
340 
341  ret = ff_framesync_configure(&s->fs);
342  outlink->time_base = s->fs.time_base;
343 
344  return ret;
345 }
346 
348 {
349  RemapContext *s = ctx->priv;
350  return ff_framesync_activate(&s->fs);
351 }
352 
354 {
355  RemapContext *s = ctx->priv;
356 
357  ff_framesync_uninit(&s->fs);
358 }
359 
360 static const AVFilterPad remap_inputs[] = {
361  {
362  .name = "source",
363  .type = AVMEDIA_TYPE_VIDEO,
364  .config_props = config_input,
365  },
366  {
367  .name = "xmap",
368  .type = AVMEDIA_TYPE_VIDEO,
369  },
370  {
371  .name = "ymap",
372  .type = AVMEDIA_TYPE_VIDEO,
373  },
374  { NULL }
375 };
376 
377 static const AVFilterPad remap_outputs[] = {
378  {
379  .name = "default",
380  .type = AVMEDIA_TYPE_VIDEO,
381  .config_props = config_output,
382  },
383  { NULL }
384 };
385 
387  .name = "remap",
388  .description = NULL_IF_CONFIG_SMALL("Remap pixels."),
389  .priv_size = sizeof(RemapContext),
390  .uninit = uninit,
392  .activate = activate,
393  .inputs = remap_inputs,
394  .outputs = remap_outputs,
395  .priv_class = &remap_class,
397 };
#define NULL
Definition: coverity.c:32
AVFrame * out
Definition: af_adeclick.c:488
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
int nb_components
Definition: vf_remap.c:53
#define DEFINE_REMAP_PACKED_FUNC(name, bits, div)
remap_packed algorithm expects pixels with both padded bits (step) and number of components correctly...
Definition: vf_remap.c:188
AVOption.
Definition: opt.h:246
AVFilter ff_vf_remap
Definition: vf_remap.c:386
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:397
AVFILTER_DEFINE_CLASS(remap)
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:407
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.
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
const char * desc
Definition: nvenc.c:68
#define AV_PIX_FMT_RGBA64
Definition: pixfmt.h:377
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:403
#define AV_PIX_FMT_BGRA64
Definition: pixfmt.h:382
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:367
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
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
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:125
int nb_planes
Definition: vf_remap.c:75
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(* remap_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_remap.c:58
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1093
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
#define av_cold
Definition: attributes.h:82
AVOptions.
static int config_input(AVFilterLink *inlink)
Definition: vf_remap.c:231
AVFrame * yin
Definition: vf_remap.c:74
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 FLAGS
Definition: vf_remap.c:62
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:402
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:94
#define OFFSET(x)
Definition: vf_remap.c:61
static int activate(AVFilterContext *ctx)
Definition: vf_remap.c:347
static int query_formats(AVFilterContext *ctx)
Definition: vf_remap.c:80
#define AV_PIX_FMT_BGR48
Definition: pixfmt.h:378
AVFrame * xin
Definition: vf_remap.c:74
#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
static int config_output(AVFilterLink *outlink)
Definition: vf_remap.c:297
#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
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define td
Definition: regdef.h:70
int step
Definition: vf_remap.c:77
void ff_framesync_uninit(FFFrameSync *fs)
Free all memory currently allocated.
Definition: framesync.c:293
Frame sync structure.
Definition: framesync.h:146
static enum AVPixelFormat gray_pix_fmts[]
Definition: jpeg2000dec.c:248
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:95
void * priv
private data for use by the filter
Definition: avfilter.h:353
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:2487
#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
#define AV_PIX_FMT_RGB48
Definition: pixfmt.h:373
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
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:92
#define fail()
Definition: checkasm.h:122
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:409
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
FFFrameSync fs
Definition: vf_remap.c:56
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
#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
#define AV_PIX_FMT_YUVA444P12
Definition: pixfmt.h:428
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:439
int nb_planes
Definition: vf_remap.c:52
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_remap.c:353
AVFormatContext * ctx
Definition: movenc.c:48
AVRational time_base
Time base for the output events.
Definition: framesync.h:162
static int process_frame(FFFrameSync *fs)
Definition: vf_remap.c:258
#define s(width, name)
Definition: cbs_vp9.c:257
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
#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 DEFINE_REMAP_PLANAR_FUNC(name, bits, div)
remap_planar algorithm expects planes of same size pixels are copied from source to target using : Ta...
Definition: vf_remap.c:139
static const AVOption remap_options[]
Definition: vf_remap.c:64
Extend the frame to infinity.
Definition: framesync.h:75
static const int remap[16]
Definition: msvideo1enc.c:63
Used for passing data between threads.
Definition: dsddec.c:64
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
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
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
Ignore this stream and continue processing the other ones.
Definition: framesync.h:70
const char * name
Filter name.
Definition: avfilter.h:148
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_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_YUV444P12
Definition: pixfmt.h:394
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
int
static const AVFilterPad remap_outputs[]
Definition: vf_remap.c:377
Y , 8bpp.
Definition: pixfmt.h:74
int format
Definition: vf_remap.c:50
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
avfilter_execute_func * execute
Definition: internal.h:155
int nb_components
Definition: vf_remap.c:76
Completely stop all streams with this one.
Definition: framesync.h:65
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:338
FILE * out
Definition: movenc.c:54
#define av_freep(p)
static const AVFilterPad remap_inputs[]
Definition: vf_remap.c:360
AVFrame * in
Definition: af_afftdn.c:1083
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
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654
int * formats
list of media formats
Definition: formats.h:66