FFmpeg
vf_shear.c
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1 /*
2  * Copyright (c) 2021 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/avstring.h"
22 #include "libavutil/opt.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/parseutils.h"
25 #include "libavutil/pixdesc.h"
26 
27 #include "avfilter.h"
28 #include "drawutils.h"
29 #include "internal.h"
30 #include "video.h"
31 
32 #include <float.h>
33 
34 typedef struct ShearContext {
35  const AVClass *class;
36 
37  float shx, shy;
38  int interp;
39 
40  uint8_t fillcolor[4]; ///< color expressed either in YUVA or RGBA colorspace for the padding area
43  int nb_planes;
44  int depth;
47 
48  int hsub, vsub;
49  int planewidth[4];
50  int planeheight[4];
51 
52  int (*filter_slice[2])(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
53 } ShearContext;
54 
55 typedef struct ThreadData {
56  AVFrame *in, *out;
57 } ThreadData;
58 
59 #define OFFSET(x) offsetof(ShearContext, x)
60 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
61 
62 static const AVOption shear_options[] = {
63  { "shx", "set x shear factor", OFFSET(shx), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -2, 2, .flags=FLAGS },
64  { "shy", "set y shear factor", OFFSET(shy), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -2, 2, .flags=FLAGS },
65  { "fillcolor", "set background fill color", OFFSET(fillcolor_str), AV_OPT_TYPE_STRING, {.str="black"}, 0, 0, .flags=FLAGS },
66  { "c", "set background fill color", OFFSET(fillcolor_str), AV_OPT_TYPE_STRING, {.str="black"}, 0, 0, .flags=FLAGS },
67  { "interp", "set interpolation", OFFSET(interp), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, .flags=FLAGS, "interp" },
68  { "nearest", "nearest neighbour", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, .flags=FLAGS, "interp" },
69  { "bilinear", "bilinear", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, .flags=FLAGS, "interp" },
70  { NULL }
71 };
72 
74 
76 {
77  ShearContext *s = ctx->priv;
78 
79  if (!strcmp(s->fillcolor_str, "none"))
80  s->fillcolor_enable = 0;
81  else if (av_parse_color(s->fillcolor, s->fillcolor_str, -1, ctx) >= 0)
82  s->fillcolor_enable = 1;
83  else
84  return AVERROR(EINVAL);
85  return 0;
86 }
87 
89 {
90  static const enum AVPixelFormat pix_fmts[] = {
115  };
116 
118  if (!fmts_list)
119  return AVERROR(ENOMEM);
120  return ff_set_common_formats(ctx, fmts_list);
121 }
122 
123 #define NN(type, name) \
124 static int filter_slice_nn##name(AVFilterContext *ctx, void *arg, int jobnr, \
125  int nb_jobs) \
126 { \
127  ThreadData *td = arg; \
128  AVFrame *in = td->in; \
129  AVFrame *out = td->out; \
130  ShearContext *s = ctx->priv; \
131  const float shx = s->shx; \
132  const float shy = s->shy; \
133  \
134  for (int p = 0; p < s->nb_planes; p++) { \
135  const int hsub = (p == 1 || p == 2) ? s->hsub: 1; \
136  const int vsub = (p == 1 || p == 2) ? s->vsub: 1; \
137  const int width = s->planewidth[p]; \
138  const int height = s->planeheight[p]; \
139  const int wx = vsub * shx * height * 0.5f / hsub; \
140  const int wy = hsub * shy * width * 0.5f / vsub; \
141  const int slice_start = (height * jobnr) / nb_jobs; \
142  const int slice_end = (height * (jobnr+1)) / nb_jobs; \
143  const int src_linesize = in->linesize[p] / sizeof(type); \
144  const int dst_linesize = out->linesize[p] / sizeof(type); \
145  const type *src = (const type *)in->data[p]; \
146  type *dst = (type *)out->data[p] + slice_start * dst_linesize; \
147  \
148  for (int y = slice_start; y < slice_end; y++) { \
149  for (int x = 0; x < width; x++) { \
150  int sx = x + vsub * shx * y / hsub - wx; \
151  int sy = y + hsub * shy * x / vsub - wy; \
152  \
153  if (sx >= 0 && sx < width - 1 && \
154  sy >= 0 && sy < height - 1) { \
155  dst[x] = src[sy * src_linesize + sx]; \
156  } \
157  } \
158  \
159  dst += dst_linesize; \
160  } \
161  } \
162  \
163  return 0; \
164 }
165 
166 NN(uint8_t, 8)
167 NN(uint16_t, 16)
168 
169 #define BL(type, name) \
170 static int filter_slice_bl##name(AVFilterContext *ctx, void *arg, int jobnr, \
171  int nb_jobs) \
172 { \
173  ThreadData *td = arg; \
174  AVFrame *in = td->in; \
175  AVFrame *out = td->out; \
176  ShearContext *s = ctx->priv; \
177  const int depth = s->depth; \
178  const float shx = s->shx; \
179  const float shy = s->shy; \
180  \
181  for (int p = 0; p < s->nb_planes; p++) { \
182  const int hsub = (p == 1 || p == 2) ? s->hsub: 1; \
183  const int vsub = (p == 1 || p == 2) ? s->vsub: 1; \
184  const int width = s->planewidth[p]; \
185  const int height = s->planeheight[p]; \
186  const float wx = vsub * shx * height * 0.5f / hsub; \
187  const float wy = hsub * shy * width * 0.5f / vsub; \
188  const int slice_start = (height * jobnr) / nb_jobs; \
189  const int slice_end = (height * (jobnr+1)) / nb_jobs; \
190  const int src_linesize = in->linesize[p] / sizeof(type); \
191  const int dst_linesize = out->linesize[p] / sizeof(type); \
192  const type *src = (const type *)in->data[p]; \
193  type *dst = (type *)out->data[p] + slice_start * dst_linesize; \
194  \
195  for (int y = slice_start; y < slice_end; y++) { \
196  for (int x = 0; x < width; x++) { \
197  const float sx = x + vsub * shx * y / hsub - wx; \
198  const float sy = y + hsub * shy * x / vsub - wy; \
199  \
200  if (sx >= 0 && sx < width - 1 && \
201  sy >= 0 && sy < height - 1) { \
202  float sum = 0.f; \
203  int ax = floorf(sx); \
204  int ay = floorf(sy); \
205  float du = sx - ax; \
206  float dv = sy - ay; \
207  int bx = FFMIN(ax + 1, width - 1); \
208  int by = FFMIN(ay + 1, height - 1); \
209  \
210  sum += (1.f - du) * (1.f - dv) * src[ay * src_linesize + ax];\
211  sum += ( du) * (1.f - dv) * src[ay * src_linesize + bx];\
212  sum += (1.f - du) * ( dv) * src[by * src_linesize + ax];\
213  sum += ( du) * ( dv) * src[by * src_linesize + bx];\
214  dst[x] = av_clip_uintp2_c(lrintf(sum), depth); \
215  } \
216  } \
217  \
218  dst += dst_linesize; \
219  } \
220  } \
221  \
222  return 0; \
223 }
224 
225 BL(uint8_t, 8)
226 BL(uint16_t, 16)
227 
229 {
230  AVFilterContext *ctx = inlink->dst;
231  ShearContext *s = ctx->priv;
232  AVFilterLink *outlink = ctx->outputs[0];
233  ThreadData td;
234  AVFrame *out;
235 
236  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
237  if (!out) {
238  av_frame_free(&in);
239  return AVERROR(ENOMEM);
240  }
242 
243  /* fill background */
244  if (s->fillcolor_enable)
245  ff_fill_rectangle(&s->draw, &s->color, out->data, out->linesize,
246  0, 0, outlink->w, outlink->h);
247 
248  td.in = in, td.out = out;
249  ctx->internal->execute(ctx, s->filter_slice[s->interp], &td, NULL, FFMIN(s->planeheight[1], ff_filter_get_nb_threads(ctx)));
250 
251  av_frame_free(&in);
252  return ff_filter_frame(outlink, out);
253 }
254 
255 static int config_output(AVFilterLink *outlink)
256 {
257  AVFilterContext *ctx = outlink->src;
258  ShearContext *s = ctx->priv;
260 
261  s->nb_planes = av_pix_fmt_count_planes(outlink->format);
262  s->depth = desc->comp[0].depth;
263  s->hsub = 1 << desc->log2_chroma_w;
264  s->vsub = 1 << desc->log2_chroma_h;
265  s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(ctx->inputs[0]->w, desc->log2_chroma_w);
266  s->planewidth[0] = s->planewidth[3] = ctx->inputs[0]->w;
267  s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(ctx->inputs[0]->h, desc->log2_chroma_h);
268  s->planeheight[0] = s->planeheight[3] = ctx->inputs[0]->h;
269 
270  ff_draw_init(&s->draw, outlink->format, 0);
271  ff_draw_color(&s->draw, &s->color, s->fillcolor);
272 
273  s->filter_slice[0] = s->depth <= 8 ? filter_slice_nn8 : filter_slice_nn16;
274  s->filter_slice[1] = s->depth <= 8 ? filter_slice_bl8 : filter_slice_bl16;
275 
276  return 0;
277 }
278 
280  const char *cmd,
281  const char *arg,
282  char *res,
283  int res_len,
284  int flags)
285 {
286  ShearContext *s = ctx->priv;
287  int ret;
288 
289  ret = ff_filter_process_command(ctx, cmd, arg, res, res_len, flags);
290  if (ret < 0)
291  return ret;
292 
293  ret = init(ctx);
294  if (ret < 0)
295  return ret;
296  ff_draw_color(&s->draw, &s->color, s->fillcolor);
297 
298  return 0;
299 }
300 
301 static const AVFilterPad inputs[] = {
302  {
303  .name = "default",
304  .type = AVMEDIA_TYPE_VIDEO,
305  .filter_frame = filter_frame,
306  },
307  { NULL }
308 };
309 
310 static const AVFilterPad outputs[] = {
311  {
312  .name = "default",
313  .type = AVMEDIA_TYPE_VIDEO,
314  .config_props = config_output,
315  },
316  { NULL }
317 };
318 
320  .name = "shear",
321  .description = NULL_IF_CONFIG_SMALL("Shear transform the input image."),
322  .priv_size = sizeof(ShearContext),
323  .init = init,
325  .inputs = inputs,
326  .outputs = outputs,
327  .priv_class = &shear_class,
330 };
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:97
AV_PIX_FMT_YUVA422P16
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:432
AV_PIX_FMT_GBRAP16
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:411
ShearContext::draw
FFDrawContext draw
Definition: vf_shear.c:45
td
#define td
Definition: regdef.h:70
FFDrawColor
Definition: drawutils.h:49
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(shear)
AVERROR
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
opt.h
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:286
out
FILE * out
Definition: movenc.c:54
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:978
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2540
av_parse_color
int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen, void *log_ctx)
Put the RGBA values that correspond to color_string in rgba_color.
Definition: parseutils.c:354
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_shear.c:255
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_shear.c:88
ShearContext::fillcolor_str
char * fillcolor_str
Definition: vf_shear.c:41
inlink
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
Definition: filter_design.txt:212
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:112
AV_PIX_FMT_YUVA422P9
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:424
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
pixdesc.h
AV_PIX_FMT_YUVA420P16
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:431
NN
#define NN(type, name)
Definition: vf_shear.c:123
AV_PIX_FMT_YUVA420P10
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:426
AVOption
AVOption.
Definition: opt.h:247
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Definition: vf_shear.c:279
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_shear.c:228
AV_PIX_FMT_YUV420P10
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:389
FLAGS
#define FLAGS
Definition: vf_shear.c:60
float.h
AV_PIX_FMT_YUV440P
@ AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:149
ThreadData::out
AVFrame * out
Definition: af_adeclick.c:502
video.h
AVFormatContext::internal
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1565
AV_PIX_FMT_YUVA422P10
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:427
ShearContext::shx
float shx
Definition: vf_shear.c:37
AV_PIX_FMT_GRAY9
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:369
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2580
AV_PIX_FMT_YUVA420P9
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:423
AV_PIX_FMT_GBRP14
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:407
AV_PIX_FMT_GBRAP
@ AV_PIX_FMT_GBRAP
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:205
AV_PIX_FMT_GBRP10
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:405
AV_PIX_FMT_YUVA444P16
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:433
AV_PIX_FMT_YUV422P9
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:387
BL
#define BL(type, name)
Definition: vf_shear.c:169
AV_PIX_FMT_GRAY16
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:373
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
AV_PIX_FMT_YUV444P10
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:392
AV_PIX_FMT_YUVJ411P
@ AV_PIX_FMT_YUVJ411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:248
av_cold
#define av_cold
Definition: attributes.h:90
AV_PIX_FMT_YUV422P16
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:401
ff_set_common_formats
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:580
ShearContext::interp
int interp
Definition: vf_shear.c:38
AV_PIX_FMT_YUVJ422P
@ AV_PIX_FMT_YUVJ422P
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
AV_PIX_FMT_GBRAP10
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:409
ShearContext::vsub
int vsub
Definition: vf_shear.c:48
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
AV_PIX_FMT_GBRAP12
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:410
AV_PIX_FMT_YUVA420P
@ AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
AV_PIX_FMT_YUV444P16
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:402
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:51
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:290
AV_PIX_FMT_YUVA444P12
#define AV_PIX_FMT_YUVA444P12
Definition: pixfmt.h:430
AV_PIX_FMT_YUV420P9
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:386
AV_PIX_FMT_YUV420P16
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:400
ctx
AVFormatContext * ctx
Definition: movenc.c:48
AV_PIX_FMT_GRAY14
#define AV_PIX_FMT_GRAY14
Definition: pixfmt.h:372
outputs
static const AVFilterPad outputs[]
Definition: vf_shear.c:310
ff_draw_init
int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
Init a draw context.
Definition: drawutils.c:82
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
AV_PIX_FMT_YUVJ444P
@ AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
arg
const char * arg
Definition: jacosubdec.c:67
AV_PIX_FMT_GRAY10
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:370
ShearContext::hsub
int hsub
Definition: vf_shear.c:48
AV_PIX_FMT_GBRP16
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:408
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:537
OFFSET
#define OFFSET(x)
Definition: vf_shear.c:59
AV_PIX_FMT_YUVJ420P
@ AV_PIX_FMT_YUVJ420P
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
parseutils.h
AV_PIX_FMT_YUV440P10
#define AV_PIX_FMT_YUV440P10
Definition: pixfmt.h:391
AV_PIX_FMT_YUV422P10
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:390
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
ShearContext::planewidth
int planewidth[4]
Definition: vf_shear.c:49
AV_PIX_FMT_GBRP9
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:404
ShearContext::color
FFDrawColor color
Definition: vf_shear.c:46
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:116
AV_PIX_FMT_YUV422P12
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:394
ff_fill_rectangle
void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_x, int dst_y, int w, int h)
Fill a rectangle with an uniform color.
Definition: drawutils.c:222
ShearContext::depth
int depth
Definition: vf_shear.c:44
AV_PIX_FMT_YUV444P12
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:396
ff_filter_process_command
int ff_filter_process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Generic processing of user supplied commands that are set in the same way as the filter options.
Definition: avfilter.c:842
AV_PIX_FMT_YUVA444P
@ AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:167
AV_PIX_FMT_YUVA444P10
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:428
inputs
static const AVFilterPad inputs[]
Definition: vf_shear.c:301
internal.h
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
#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
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:227
AV_PIX_FMT_GBRP12
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:406
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:762
ThreadData
Used for passing data between threads.
Definition: dsddec.c:67
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AV_PIX_FMT_YUVJ440P
@ AV_PIX_FMT_YUVJ440P
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range
Definition: pixfmt.h:100
shear_options
static const AVOption shear_options[]
Definition: vf_shear.c:62
FFDrawContext
Definition: drawutils.h:35
ShearContext::filter_slice
int(* filter_slice[2])(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_shear.c:52
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
AV_PIX_FMT_YUV444P9
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:388
ShearContext::nb_planes
int nb_planes
Definition: vf_shear.c:43
ff_draw_color
void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
Prepare a color.
Definition: drawutils.c:135
AVFilter
Filter definition.
Definition: avfilter.h:145
ret
ret
Definition: filter_design.txt:187
AV_PIX_FMT_YUVA444P9
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:425
AV_PIX_FMT_YUV420P12
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:393
ShearContext::planeheight
int planeheight[4]
Definition: vf_shear.c:50
AV_PIX_FMT_YUV422P14
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:398
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_shear.c:75
ShearContext::shy
float shy
Definition: vf_shear.c:37
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_PIX_FMT_YUVA422P12
#define AV_PIX_FMT_YUVA422P12
Definition: pixfmt.h:429
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:224
avfilter.h
ShearContext::fillcolor
uint8_t fillcolor[4]
color expressed either in YUVA or RGBA colorspace for the padding area
Definition: vf_shear.c:40
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
AVFilterContext
An instance of a filter.
Definition: avfilter.h:333
ShearContext
Definition: vf_shear.c:34
AV_PIX_FMT_GBRP
@ AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:158
AVFILTER_FLAG_SLICE_THREADS
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:117
desc
const char * desc
Definition: libsvtav1.c:79
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
ThreadData::in
AVFrame * in
Definition: af_adenorm.c:223
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
AV_PIX_FMT_YUV411P
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
ShearContext::fillcolor_enable
int fillcolor_enable
Definition: vf_shear.c:42
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
ff_vf_shear
const AVFilter ff_vf_shear
Definition: vf_shear.c:319
AV_PIX_FMT_YUV440P12
#define AV_PIX_FMT_YUV440P12
Definition: pixfmt.h:395
AV_PIX_FMT_YUV444P14
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:399
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:228
AV_PIX_FMT_GRAY12
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:371
drawutils.h
int
int
Definition: ffmpeg_filter.c:156
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:233
AV_PIX_FMT_YUVA422P
@ AV_PIX_FMT_YUVA422P
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:166
AV_PIX_FMT_YUV420P14
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:397