FFmpeg
vf_chromanr.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/avstring.h"
22 #include "libavutil/imgutils.h"
23 #include "libavutil/opt.h"
24 #include "libavutil/pixdesc.h"
25 
26 #include "avfilter.h"
27 #include "formats.h"
28 #include "internal.h"
29 #include "video.h"
30 
31 typedef struct ChromaNRContext {
32  const AVClass *class;
33 
34  float threshold;
35  float threshold_y;
36  float threshold_u;
37  float threshold_v;
38  int thres;
39  int thres_y;
40  int thres_u;
41  int thres_v;
42  int sizew;
43  int sizeh;
44  int stepw;
45  int steph;
46  int depth;
47  int chroma_w;
48  int chroma_h;
49  int nb_planes;
50  int linesize[4];
51  int planeheight[4];
52  int planewidth[4];
53 
55  int (*filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
57 
59 {
60  static const enum AVPixelFormat pix_fmts[] = {
74  };
75 
76  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
77  if (!fmts_list)
78  return AVERROR(ENOMEM);
79  return ff_set_common_formats(ctx, fmts_list);
80 }
81 
82 #define FILTER_FUNC(name, type) \
83 static int filter_slice##name(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) \
84 { \
85  ChromaNRContext *s = ctx->priv; \
86  AVFrame *in = arg; \
87  AVFrame *out = s->out; \
88  const int in_ylinesize = in->linesize[0]; \
89  const int in_ulinesize = in->linesize[1]; \
90  const int in_vlinesize = in->linesize[2]; \
91  const int out_ulinesize = out->linesize[1]; \
92  const int out_vlinesize = out->linesize[2]; \
93  const int chroma_w = s->chroma_w; \
94  const int chroma_h = s->chroma_h; \
95  const int stepw = s->stepw; \
96  const int steph = s->steph; \
97  const int sizew = s->sizew; \
98  const int sizeh = s->sizeh; \
99  const int thres = s->thres; \
100  const int thres_y = s->thres_y; \
101  const int thres_u = s->thres_u; \
102  const int thres_v = s->thres_v; \
103  const int h = s->planeheight[1]; \
104  const int w = s->planewidth[1]; \
105  const int slice_start = (h * jobnr) / nb_jobs; \
106  const int slice_end = (h * (jobnr+1)) / nb_jobs; \
107  type *out_uptr = (type *)(out->data[1] + slice_start * out_ulinesize); \
108  type *out_vptr = (type *)(out->data[2] + slice_start * out_vlinesize); \
109  \
110  { \
111  const int h = s->planeheight[0]; \
112  const int slice_start = (h * jobnr) / nb_jobs; \
113  const int slice_end = (h * (jobnr+1)) / nb_jobs; \
114  \
115  av_image_copy_plane(out->data[0] + slice_start * out->linesize[0], \
116  out->linesize[0], \
117  in->data[0] + slice_start * in->linesize[0], \
118  in->linesize[0], \
119  s->linesize[0], slice_end - slice_start); \
120  \
121  if (s->nb_planes == 4) { \
122  av_image_copy_plane(out->data[3] + slice_start * out->linesize[3], \
123  out->linesize[3], \
124  in->data[3] + slice_start * in->linesize[3], \
125  in->linesize[3], \
126  s->linesize[3], slice_end - slice_start); \
127  } \
128  } \
129  \
130  for (int y = slice_start; y < slice_end; y++) { \
131  const type *in_yptr = (const type *)(in->data[0] + y * chroma_h * in_ylinesize); \
132  const type *in_uptr = (const type *)(in->data[1] + y * in_ulinesize); \
133  const type *in_vptr = (const type *)(in->data[2] + y * in_vlinesize); \
134  \
135  for (int x = 0; x < w; x++) { \
136  const int cy = in_yptr[x * chroma_w]; \
137  const int cu = in_uptr[x]; \
138  const int cv = in_vptr[x]; \
139  int su = cu; \
140  int sv = cv; \
141  int cn = 1; \
142  \
143  for (int yy = FFMAX(0, y - sizeh); yy < FFMIN(y + sizeh, h); yy += steph) { \
144  const type *in_yptr = (const type *)(in->data[0] + yy * chroma_h * in_ylinesize); \
145  const type *in_uptr = (const type *)(in->data[1] + yy * in_ulinesize); \
146  const type *in_vptr = (const type *)(in->data[2] + yy * in_vlinesize); \
147  \
148  for (int xx = FFMAX(0, x - sizew); xx < FFMIN(x + sizew, w); xx += stepw) { \
149  const int Y = in_yptr[xx * chroma_w]; \
150  const int U = in_uptr[xx]; \
151  const int V = in_vptr[xx]; \
152  \
153  if (FFABS(cu - U) + FFABS(cv - V) + FFABS(cy - Y) < thres && \
154  FFABS(cu - U) < thres_u && FFABS(cv - V) < thres_v && \
155  FFABS(cy - Y) < thres_y && \
156  xx != x && yy != y) { \
157  su += U; \
158  sv += V; \
159  cn++; \
160  } \
161  } \
162  } \
163  \
164  out_uptr[x] = su / cn; \
165  out_vptr[x] = sv / cn; \
166  } \
167  \
168  out_uptr += out_ulinesize / sizeof(type); \
169  out_vptr += out_vlinesize / sizeof(type); \
170  } \
171  \
172  return 0; \
173 }
174 
176 FILTER_FUNC(16, uint16_t)
177 
179 {
180  AVFilterContext *ctx = inlink->dst;
181  AVFilterLink *outlink = ctx->outputs[0];
182  ChromaNRContext *s = ctx->priv;
183  AVFrame *out;
184 
185  s->thres = s->threshold * (1 << (s->depth - 8));
186  s->thres_y = s->threshold_y * (1 << (s->depth - 8));
187  s->thres_u = s->threshold_u * (1 << (s->depth - 8));
188  s->thres_v = s->threshold_v * (1 << (s->depth - 8));
189 
190  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
191  if (!out) {
192  av_frame_free(&in);
193  return AVERROR(ENOMEM);
194  }
195 
196  av_frame_copy_props(out, in);
197  s->out = out;
198  ctx->internal->execute(ctx, s->filter_slice, in, NULL,
199  FFMIN3(s->planeheight[1],
200  s->planeheight[2],
202 
203  av_frame_free(&in);
204  return ff_filter_frame(outlink, out);
205 }
206 
208 {
209  AVFilterContext *ctx = inlink->dst;
210  ChromaNRContext *s = ctx->priv;
212  int ret;
213 
214  s->nb_planes = desc->nb_components;
215  s->depth = desc->comp[0].depth;
216  s->filter_slice = s->depth <= 8 ? filter_slice8 : filter_slice16;
217  s->chroma_w = 1 << desc->log2_chroma_w;
218  s->chroma_h = 1 << desc->log2_chroma_h;
219  s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
220  s->planeheight[0] = s->planeheight[3] = inlink->h;
221  s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
222  s->planewidth[0] = s->planewidth[3] = inlink->w;
223 
224  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
225  return ret;
226 
227  return 0;
228 }
229 
230 #define OFFSET(x) offsetof(ChromaNRContext, x)
231 #define VF AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
232 
233 static const AVOption chromanr_options[] = {
234  { "thres", "set y+u+v threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=30}, 1, 200, VF },
235  { "sizew", "set horizontal size", OFFSET(sizew), AV_OPT_TYPE_INT, {.i64=5}, 1, 100, VF },
236  { "sizeh", "set vertical size", OFFSET(sizeh), AV_OPT_TYPE_INT, {.i64=5}, 1, 100, VF },
237  { "stepw", "set horizontal step", OFFSET(stepw), AV_OPT_TYPE_INT, {.i64=1}, 1, 50, VF },
238  { "steph", "set vertical step", OFFSET(steph), AV_OPT_TYPE_INT, {.i64=1}, 1, 50, VF },
239  { "threy", "set y threshold", OFFSET(threshold_y), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
240  { "threu", "set u threshold", OFFSET(threshold_u), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
241  { "threv", "set v threshold", OFFSET(threshold_v), AV_OPT_TYPE_FLOAT, {.dbl=200},1, 200, VF },
242  { NULL }
243 };
244 
245 static const AVFilterPad inputs[] = {
246  {
247  .name = "default",
248  .type = AVMEDIA_TYPE_VIDEO,
249  .filter_frame = filter_frame,
250  .config_props = config_input,
251  },
252  { NULL }
253 };
254 
255 static const AVFilterPad outputs[] = {
256  {
257  .name = "default",
258  .type = AVMEDIA_TYPE_VIDEO,
259  },
260  { NULL }
261 };
262 
263 AVFILTER_DEFINE_CLASS(chromanr);
264 
266  .name = "chromanr",
267  .description = NULL_IF_CONFIG_SMALL("Reduce chrominance noise."),
268  .priv_size = sizeof(ChromaNRContext),
269  .priv_class = &chromanr_class,
271  .outputs = outputs,
272  .inputs = inputs,
275 };
AVFILTER_DEFINE_CLASS(chromanr)
#define NULL
Definition: coverity.c:32
#define FILTER_FUNC(name, type)
Definition: vf_chromanr.c:82
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:442
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:434
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_YUVA420P10
Definition: pixfmt.h:436
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:409
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:437
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
Main libavfilter public API header.
static const AVFilterPad outputs[]
Definition: vf_chromanr.c:255
#define VF
Definition: vf_chromanr.c:231
int(* filter_slice)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_chromanr.c:55
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:403
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
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
int planeheight[4]
Definition: vf_chromanr.c:51
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:287
#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
AVFrame * out
Definition: vf_chromanr.c:54
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1091
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
AVOptions.
static int query_formats(AVFilterContext *ctx)
Definition: vf_chromanr.c:58
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:433
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
Definition: pixfmt.h:100
#define FFMIN3(a, b, c)
Definition: common.h:97
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:412
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:404
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:441
A filter pad used for either input or output.
Definition: internal.h:54
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.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:588
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
#define OFFSET(x)
Definition: vf_chromanr.c:230
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
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:885
void * priv
private data for use by the filter
Definition: avfilter.h:356
static const AVFilterPad inputs[]
Definition: vf_chromanr.c:245
#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
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:402
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:397
AVFilter ff_vf_chromanr
Definition: vf_chromanr.c:265
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:83
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:800
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
#define AV_PIX_FMT_YUVA444P12
Definition: pixfmt.h:440
static int config_input(AVFilterLink *inlink)
Definition: vf_chromanr.c:207
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_YUV420P16
Definition: pixfmt.h:410
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:407
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
static const AVOption chromanr_options[]
Definition: vf_chromanr.c:233
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:399
Describe the class of an AVClass context structure.
Definition: log.h:67
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
int planewidth[4]
Definition: vf_chromanr.c:52
const char * name
Filter name.
Definition: avfilter.h:149
#define AV_PIX_FMT_YUV440P12
Definition: pixfmt.h:405
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:396
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_YUV422P14
Definition: pixfmt.h:408
#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_YUV422P10
Definition: pixfmt.h:400
#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
int
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: af_adenorm.c:275
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:435
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_chromanr.c:178
avfilter_execute_func * execute
Definition: internal.h:136
A list of supported formats for one end of a filter link.
Definition: formats.h:65
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:341
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
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:411
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:658
#define AV_PIX_FMT_YUVA422P12
Definition: pixfmt.h:439
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58