FFmpeg
vf_shufflepixels.c
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1 /*
2  * Copyright (c) 2020 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/avassert.h"
22 #include "libavutil/avstring.h"
23 #include "libavutil/common.h"
24 #include "libavutil/internal.h"
25 #include "libavutil/imgutils.h"
26 #include "libavutil/lfg.h"
27 #include "libavutil/opt.h"
28 #include "libavutil/pixdesc.h"
29 #include "libavutil/random_seed.h"
30 
31 #include "avfilter.h"
32 #include "internal.h"
33 #include "video.h"
34 
35 typedef struct ShufflePixelsContext {
36  const AVClass *class;
37 
39  int mode;
40  int direction;
41  int64_t seed;
42 
43  int depth;
44  int nb_planes;
45  int linesize[4];
46  int planewidth[4];
47  int planeheight[4];
48 
49  int nb_blocks;
50 
53 
55 
56  int (*shuffle_pixels)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
58 
60 {
61  static const enum AVPixelFormat pix_fmts[] = {
70  };
71  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
72  if (!fmts_list)
73  return AVERROR(ENOMEM);
74  return ff_set_common_formats(ctx, fmts_list);
75 }
76 
78 {
79  ShufflePixelsContext *s = ctx->priv;
80  const int nb_blocks = s->nb_blocks;
81  AVLFG *c = &s->c;
82  uint8_t *used = s->used;
83  int32_t *map = s->map;
84 
85  for (int x = 0; x < s->planewidth[0];) {
86  int rand = av_lfg_get(c) % nb_blocks;
87 
88  if (used[rand] == 0) {
89  int width;
90 
91  if (s->direction) {
92  width = FFMIN(s->block_w, s->planewidth[0] - x);
93  map[rand * s->block_w] = x;
94  } else {
95  width = FFMIN(s->block_w, s->planewidth[0] - rand * s->block_w);
96  map[x] = rand * s->block_w;
97  }
98  used[rand] = 1;
99 
100  if (s->direction) {
101  for (int i = 1; i < width; i++) {
102  map[rand * s->block_w + i] = map[rand * s->block_w] + i;
103  }
104  } else {
105  for (int i = 1; i < width; i++) {
106  map[x + i] = map[x] + i;
107  }
108  }
109 
110  x += width;
111  }
112  }
113 }
114 
116 {
117  ShufflePixelsContext *s = ctx->priv;
118  const int nb_blocks = s->nb_blocks;
119  AVLFG *c = &s->c;
120  uint8_t *used = s->used;
121  int32_t *map = s->map;
122 
123  for (int y = 0; y < s->planeheight[0];) {
124  int rand = av_lfg_get(c) % nb_blocks;
125 
126  if (used[rand] == 0) {
127  int height;
128 
129  if (s->direction) {
130  height = FFMIN(s->block_h, s->planeheight[0] - y);
131  map[rand * s->block_h] = y;
132  } else {
133  height = FFMIN(s->block_h, s->planeheight[0] - rand * s->block_h);
134  map[y] = rand * s->block_h;
135  }
136  used[rand] = 1;
137 
138  if (s->direction) {
139  for (int i = 1; i < height; i++) {
140  map[rand * s->block_h + i] = map[rand * s->block_h] + i;
141  }
142  } else {
143  for (int i = 1; i < height; i++) {
144  map[y + i] = map[y] + i;
145  }
146  }
147 
148  y += height;
149  }
150  }
151 }
152 
154 {
155  ShufflePixelsContext *s = ctx->priv;
156  const int nb_blocks = s->nb_blocks;
157  int nb_blocks_w = s->planewidth[0] / s->block_w;
158  AVLFG *c = &s->c;
159  uint8_t *used = s->used;
160  int32_t *map = s->map;
161 
162  for (int i = 0; i < nb_blocks;) {
163  int rand = av_lfg_get(c) % nb_blocks;
164 
165  if (used[rand] == 0) {
166  int yin = i / nb_blocks_w;
167  int xin = i % nb_blocks_w;
168  int in = yin * s->block_h * s->planewidth[0] + xin * s->block_w;
169  int yout = rand / nb_blocks_w;
170  int xout = rand % nb_blocks_w;
171  int out = yout * s->block_h * s->planewidth[0] + xout * s->block_w;
172 
173  if (s->direction) {
174  map[out] = in;
175  } else {
176  map[in] = out;
177  }
178  used[rand] = 1;
179 
180  if (s->direction) {
181  for (int y = 0; y < s->block_h; y++) {
182  for (int x = 0; x < s->block_w; x++) {
183  map[out + y * s->planewidth[0] + x] = map[out] + x + y * s->planewidth[0];
184  }
185  }
186  } else {
187  for (int y = 0; y < s->block_h; y++) {
188  for (int x = 0; x < s->block_w; x++) {
189  map[in + y * s->planewidth[0] + x] = map[in] + x + y * s->planewidth[0];
190  }
191  }
192  }
193 
194  i++;
195  }
196  }
197 }
198 
199 typedef struct ThreadData {
200  AVFrame *in, *out;
201 } ThreadData;
202 
203 
204 #define SHUFFLE_HORIZONTAL(name, type) \
205 static int shuffle_horizontal## name(AVFilterContext *ctx, void *arg, \
206  int jobnr, int nb_jobs) \
207 { \
208  ShufflePixelsContext *s = ctx->priv; \
209  ThreadData *td = arg; \
210  AVFrame *in = td->in; \
211  AVFrame *out = td->out; \
212  \
213  for (int p = 0; p < s->nb_planes; p++) { \
214  const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs; \
215  const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs; \
216  type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
217  const type *src = (const type *)(in->data[p] + \
218  slice_start * in->linesize[p]); \
219  const int32_t *map = s->map; \
220  \
221  for (int y = slice_start; y < slice_end; y++) { \
222  for (int x = 0; x < s->planewidth[p]; x++) { \
223  dst[x] = src[map[x]]; \
224  } \
225  \
226  dst += out->linesize[p] / sizeof(type); \
227  src += in->linesize[p] / sizeof(type); \
228  } \
229  } \
230  \
231  return 0; \
232 }
233 
235 SHUFFLE_HORIZONTAL(16, uint16_t)
236 
237 #define SHUFFLE_VERTICAL(name, type) \
238 static int shuffle_vertical## name(AVFilterContext *ctx, void *arg, \
239  int jobnr, int nb_jobs) \
240 { \
241  ShufflePixelsContext *s = ctx->priv; \
242  ThreadData *td = arg; \
243  AVFrame *in = td->in; \
244  AVFrame *out = td->out; \
245  \
246  for (int p = 0; p < s->nb_planes; p++) { \
247  const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs; \
248  const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs; \
249  type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
250  const int32_t *map = s->map; \
251  \
252  for (int y = slice_start; y < slice_end; y++) { \
253  const type *src = (const type *)(in->data[p] + \
254  map[y] * in->linesize[p]); \
255  \
256  memcpy(dst, src, s->linesize[p]); \
257  dst += out->linesize[p] / sizeof(type); \
258  } \
259  } \
260  \
261  return 0; \
262 }
263 
265 SHUFFLE_VERTICAL(16, uint16_t)
266 
267 #define SHUFFLE_BLOCK(name, type) \
268 static int shuffle_block## name(AVFilterContext *ctx, void *arg, \
269  int jobnr, int nb_jobs) \
270 { \
271  ShufflePixelsContext *s = ctx->priv; \
272  ThreadData *td = arg; \
273  AVFrame *in = td->in; \
274  AVFrame *out = td->out; \
275  \
276  for (int p = 0; p < s->nb_planes; p++) { \
277  const int slice_start = (s->planeheight[p] * jobnr) / nb_jobs; \
278  const int slice_end = (s->planeheight[p] * (jobnr+1)) / nb_jobs; \
279  type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
280  const type *src = (const type *)in->data[p]; \
281  const int32_t *map = s->map + slice_start * s->planewidth[p]; \
282  \
283  for (int y = slice_start; y < slice_end; y++) { \
284  for (int x = 0; x < s->planewidth[p]; x++) { \
285  int ymap = map[x] / s->planewidth[p]; \
286  int xmap = map[x] % s->planewidth[p]; \
287  \
288  dst[x] = src[xmap + ymap * in->linesize[p] / sizeof(type)]; \
289  } \
290  \
291  dst += out->linesize[p] / sizeof(type); \
292  map += s->planewidth[p]; \
293  } \
294  } \
295  \
296  return 0; \
297 }
298 
300 SHUFFLE_BLOCK(16, uint16_t)
301 
302 static int config_output(AVFilterLink *outlink)
303 {
304  AVFilterContext *ctx = outlink->src;
305  ShufflePixelsContext *s = ctx->priv;
306  AVFilterLink *inlink = ctx->inputs[0];
307  const AVPixFmtDescriptor *desc;
308  int ret;
309 
310  if (s->seed == -1)
311  s->seed = av_get_random_seed();
312  av_lfg_init(&s->c, s->seed);
313 
314  desc = av_pix_fmt_desc_get(outlink->format);
315  if (!desc)
316  return AVERROR_BUG;
317  s->nb_planes = av_pix_fmt_count_planes(outlink->format);
318  s->depth = desc->comp[0].depth;
319 
320  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
321  return ret;
322 
323  s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
324  s->planewidth[0] = s->planewidth[3] = inlink->w;
325 
326  s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
327  s->planeheight[0] = s->planeheight[3] = inlink->h;
328 
329  s->map = av_calloc(inlink->w * inlink->h, sizeof(*s->map));
330  if (!s->map)
331  return AVERROR(ENOMEM);
332 
333  switch (s->mode) {
334  case 0:
335  s->shuffle_pixels = s->depth <= 8 ? shuffle_horizontal8 : shuffle_horizontal16;
336  s->nb_blocks = (s->planewidth[0] + s->block_w - 1) / s->block_w;
337  break;
338  case 1:
339  s->shuffle_pixels = s->depth <= 8 ? shuffle_vertical8 : shuffle_vertical16;
340  s->nb_blocks = (s->planeheight[0] + s->block_h - 1) / s->block_h;
341  break;
342  case 2:
343  s->shuffle_pixels = s->depth <= 8 ? shuffle_block8 : shuffle_block16;
344  s->nb_blocks = (s->planeheight[0] / s->block_h) *
345  (s->planewidth[0] / s->block_w);
346  break;
347  default:
348  av_assert0(0);
349  }
350 
351  s->used = av_calloc(s->nb_blocks, sizeof(*s->used));
352  if (!s->used)
353  return AVERROR(ENOMEM);
354 
355  switch (s->mode) {
356  case 0:
357  make_horizontal_map(ctx);
358  break;
359  case 1:
360  make_vertical_map(ctx);
361  break;
362  case 2:
363  make_block_map(ctx);
364  break;
365  default:
366  av_assert0(0);
367  }
368 
369  return 0;
370 }
371 
373 {
374  AVFilterContext *ctx = inlink->dst;
375  ShufflePixelsContext *s = ctx->priv;
376  AVFrame *out = ff_get_video_buffer(ctx->outputs[0], in->width, in->height);
377  ThreadData td;
378  int ret;
379 
380  ret = av_frame_copy_props(out, in);
381  if (ret < 0) {
382  av_frame_free(&out);
383  goto fail;
384  }
385 
386  td.out = out;
387  td.in = in;
388  ctx->internal->execute(ctx, s->shuffle_pixels, &td, NULL, FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx)));
389 
390  av_frame_free(&in);
391  return ff_filter_frame(ctx->outputs[0], out);
392 fail:
393  av_frame_free(&in);
394  return ret;
395 }
396 
398 {
399  ShufflePixelsContext *s = ctx->priv;
400 
401  av_freep(&s->map);
402  av_freep(&s->used);
403 }
404 
405 #define OFFSET(x) offsetof(ShufflePixelsContext, x)
406 #define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
407 static const AVOption shufflepixels_options[] = {
408  { "direction", "set shuffle direction", OFFSET(direction), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "dir" },
409  { "d", "set shuffle direction", OFFSET(direction), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "dir" },
410  { "forward", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "dir" },
411  { "inverse", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "dir" },
412  { "mode", "set shuffle mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, FLAGS, "mode" },
413  { "m", "set shuffle mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, FLAGS, "mode" },
414  { "horizontal", 0, 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "mode" },
415  { "vertical", 0, 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "mode" },
416  { "block", 0, 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "mode" },
417  { "width", "set block width", OFFSET(block_w), AV_OPT_TYPE_INT, {.i64=10}, 1, 8000, FLAGS },
418  { "w", "set block width", OFFSET(block_w), AV_OPT_TYPE_INT, {.i64=10}, 1, 8000, FLAGS },
419  { "height", "set block height", OFFSET(block_h), AV_OPT_TYPE_INT, {.i64=10}, 1, 8000, FLAGS },
420  { "h", "set block height", OFFSET(block_h), AV_OPT_TYPE_INT, {.i64=10}, 1, 8000, FLAGS },
421  { "seed", "set random seed", OFFSET(seed), AV_OPT_TYPE_INT64, {.i64=-1}, -1, UINT_MAX, FLAGS },
422  { "s", "set random seed", OFFSET(seed), AV_OPT_TYPE_INT64, {.i64=-1}, -1, UINT_MAX, FLAGS },
423  { NULL },
424 };
425 
426 AVFILTER_DEFINE_CLASS(shufflepixels);
427 
429  {
430  .name = "default",
431  .type = AVMEDIA_TYPE_VIDEO,
432  .filter_frame = filter_frame,
433  },
434  { NULL },
435 };
436 
438  {
439  .name = "default",
440  .type = AVMEDIA_TYPE_VIDEO,
441  .config_props = config_output,
442  },
443  { NULL },
444 };
445 
447  .name = "shufflepixels",
448  .description = NULL_IF_CONFIG_SMALL("Shuffle video pixels."),
449  .priv_size = sizeof(ShufflePixelsContext),
450  .priv_class = &shufflepixels_class,
452  .uninit = uninit,
453  .inputs = shufflepixels_inputs,
454  .outputs = shufflepixels_outputs,
456 };
Context structure for the Lagged Fibonacci PRNG.
Definition: lfg.h:33
#define NULL
Definition: coverity.c:32
AVFrame * out
Definition: af_adeclick.c:502
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
This structure describes decoded (raw) audio or video data.
Definition: frame.h:314
AVOption.
Definition: opt.h:248
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:409
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:419
static av_cold void uninit(AVFilterContext *ctx)
const char * desc
Definition: libsvtav1.c:79
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:2613
Main libavfilter public API header.
#define SHUFFLE_BLOCK(name, type)
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:415
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:379
#define SHUFFLE_HORIZONTAL(name, type)
static void make_horizontal_map(AVFilterContext *ctx)
AVFilter ff_vf_shufflepixels
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(* shuffle_pixels)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:245
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:287
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:380
#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:126
const char * name
Pad name.
Definition: internal.h:60
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:349
static int query_formats(AVFilterContext *ctx)
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
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
uint8_t
#define av_cold
Definition: attributes.h:88
AVOptions.
#define OFFSET(x)
static const AVFilterPad shufflepixels_outputs[]
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:414
#define height
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:412
A filter pad used for either input or output.
Definition: internal.h:54
int width
Definition: frame.h:372
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:588
#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 av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:115
void * priv
private data for use by the filter
Definition: avfilter.h:356
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:117
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:443
const char * arg
Definition: jacosubdec.c:66
AVFILTER_DEFINE_CLASS(shufflepixels)
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:420
simple assert() macros that are a bit more flexible than ISO C assert().
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:402
#define fail()
Definition: checkasm.h:133
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:421
static const AVOption shufflepixels_options[]
common internal API header
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:418
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:801
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:383
#define FFMIN(a, b)
Definition: common.h:105
#define width
static void make_block_map(AVFilterContext *ctx)
int32_t
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:438
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:398
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:417
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
Used for passing data between threads.
Definition: dsddec.c:67
#define SHUFFLE_VERTICAL(name, type)
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:382
static unsigned int av_lfg_get(AVLFG *c)
Get the next random unsigned 32-bit number using an ALFG.
Definition: lfg.h:53
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 AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
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
Describe the class of an AVClass context structure.
Definition: log.h:67
static const AVFilterPad shufflepixels_inputs[]
Filter definition.
Definition: avfilter.h:145
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
#define FLAGS
const char * name
Filter name.
Definition: avfilter.h:149
av_cold void av_lfg_init(AVLFG *c, unsigned int seed)
Definition: lfg.c:32
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:353
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:303
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:416
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:381
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:406
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
static void make_vertical_map(AVFilterContext *ctx)
int
Y , 8bpp.
Definition: pixfmt.h:74
static int config_output(AVFilterLink *outlink)
common internal and external API header
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:215
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:435
avfilter_execute_func * execute
Definition: internal.h:136
A list of supported formats for one end of a filter link.
Definition: formats.h:65
An instance of a filter.
Definition: avfilter.h:341
int height
Definition: frame.h:372
FILE * out
Definition: movenc.c:54
#define av_freep(p)
uint32_t av_get_random_seed(void)
Get a seed to use in conjunction with random functions.
Definition: random_seed.c:120
AVFrame * in
Definition: af_adenorm.c:223
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 depth
Number of bits in the component.
Definition: pixdesc.h:58
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
mode
Use these values in ebur128_init (or&#39;ed).
Definition: ebur128.h:83
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:658
int i
Definition: input.c:407
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58