FFmpeg
vf_amplify.c
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1 /*
2  * Copyright (c) 2018 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/imgutils.h"
22 #include "libavutil/intreadwrite.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 AmplifyContext {
32  const AVClass *class;
34  int radius;
35  float factor;
36  float threshold;
37  float tolerance;
38  int planes;
39 
40  int llimit;
41  int hlimit;
42  int nb_inputs;
43  int nb_frames;
44 
45  int depth;
46  int nb_planes;
47  int linesize[4];
48  int height[4];
49 
52 
54 {
55  static const enum AVPixelFormat pixel_fmts[] = {
75  };
77  if (!formats)
78  return AVERROR(ENOMEM);
79  return ff_set_common_formats(ctx, formats);
80 }
81 
83 {
84  AmplifyContext *s = ctx->priv;
85 
86  s->nb_inputs = s->radius * 2 + 1;
87 
88  s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
89  if (!s->frames)
90  return AVERROR(ENOMEM);
91 
92  return 0;
93 }
94 
95 typedef struct ThreadData {
96  AVFrame **in, *out;
97 } ThreadData;
98 
99 static int amplify_frame(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
100 {
101  AmplifyContext *s = ctx->priv;
102  ThreadData *td = arg;
103  AVFrame **in = td->in;
104  AVFrame *out = td->out;
105  const int radius = s->radius;
106  const int nb_inputs = s->nb_inputs;
107  const float threshold = s->threshold;
108  const float tolerance = s->tolerance;
109  const float factor = s->factor;
110  const int llimit = s->llimit;
111  const int hlimit = s->hlimit;
112  const int depth = s->depth;
113  int i, p, x, y;
114 
115  if (s->depth <= 8) {
116  for (p = 0; p < s->nb_planes; p++) {
117  const int slice_start = (s->height[p] * jobnr) / nb_jobs;
118  const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
119  uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
120 
121  if (!((1 << p) & s->planes)) {
122  av_image_copy_plane(dst, out->linesize[p],
123  in[radius]->data[p] + slice_start * in[radius]->linesize[p],
124  in[radius]->linesize[p],
125  s->linesize[p], slice_end - slice_start);
126  continue;
127  }
128 
129  for (y = slice_start; y < slice_end; y++) {
130  for (x = 0; x < s->linesize[p]; x++) {
131  int src = in[radius]->data[p][y * in[radius]->linesize[p] + x];
132  float diff, avg;
133  int sum = 0;
134 
135  for (i = 0; i < nb_inputs; i++) {
136  sum += in[i]->data[p][y * in[i]->linesize[p] + x];
137  }
138 
139  avg = sum / (float)nb_inputs;
140  diff = src - avg;
141  if (fabsf(diff) < threshold && fabsf(diff) > tolerance) {
142  int amp;
143  if (diff < 0) {
144  amp = -FFMIN(FFABS(diff * factor), llimit);
145  } else {
146  amp = FFMIN(FFABS(diff * factor), hlimit);
147  }
148  dst[x] = av_clip_uint8(src + amp);
149  } else {
150  dst[x] = src;
151  }
152  }
153 
154  dst += out->linesize[p];
155  }
156  }
157  } else {
158  for (p = 0; p < s->nb_planes; p++) {
159  const int slice_start = (s->height[p] * jobnr) / nb_jobs;
160  const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
161  uint16_t *dst = (uint16_t *)(out->data[p] + slice_start * out->linesize[p]);
162 
163  if (!((1 << p) & s->planes)) {
164  av_image_copy_plane((uint8_t *)dst, out->linesize[p],
165  in[radius]->data[p] + slice_start * in[radius]->linesize[p],
166  in[radius]->linesize[p],
167  s->linesize[p], slice_end - slice_start);
168  continue;
169  }
170 
171  for (y = slice_start; y < slice_end; y++) {
172  for (x = 0; x < s->linesize[p] / 2; x++) {
173  int src = AV_RN16(in[radius]->data[p] + y * in[radius]->linesize[p] + x * 2);
174  float diff, avg;
175  int sum = 0;
176 
177  for (i = 0; i < nb_inputs; i++) {
178  sum += AV_RN16(in[i]->data[p] + y * in[i]->linesize[p] + x * 2);
179  }
180 
181  avg = sum / (float)nb_inputs;
182  diff = src - avg;
183 
184  if (fabsf(diff) < threshold && fabsf(diff) > tolerance) {
185  int amp;
186  if (diff < 0) {
187  amp = -FFMIN(FFABS(diff * factor), llimit);
188  } else {
189  amp = FFMIN(FFABS(diff * factor), hlimit);
190  }
191  dst[x] = av_clip_uintp2_c(src + amp, depth);
192  } else {
193  dst[x] = src;
194  }
195  }
196 
197  dst += out->linesize[p] / 2;
198  }
199  }
200  }
201 
202  return 0;
203 }
204 
205 static int config_output(AVFilterLink *outlink)
206 {
207  AVFilterContext *ctx = outlink->src;
208  AmplifyContext *s = ctx->priv;
209  AVFilterLink *inlink = ctx->inputs[0];
210  int ret;
211 
212  s->desc = av_pix_fmt_desc_get(outlink->format);
213  if (!s->desc)
214  return AVERROR_BUG;
216  s->depth = s->desc->comp[0].depth;
217 
218  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
219  return ret;
220 
221  s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
222  s->height[0] = s->height[3] = inlink->h;
223 
224  return 0;
225 }
226 
228 {
229  AmplifyContext *s = ctx->priv;
230  int i;
231 
232  if (s->frames) {
233  for (i = 0; i < s->nb_frames; i++)
234  av_frame_free(&s->frames[i]);
235  }
236  av_freep(&s->frames);
237 }
238 
240 {
241  AVFilterContext *ctx = inlink->dst;
242  AVFilterLink *outlink = ctx->outputs[0];
243  AmplifyContext *s = ctx->priv;
244  ThreadData td;
245  AVFrame *out;
246 
247  if (s->nb_frames < s->nb_inputs) {
248  s->frames[s->nb_frames] = in;
249  s->nb_frames++;
250  return 0;
251  } else {
252  av_frame_free(&s->frames[0]);
253  memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1));
254  s->frames[s->nb_inputs - 1] = in;
255  }
256 
257  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
258  if (!out)
259  return AVERROR(ENOMEM);
260  out->pts = s->frames[0]->pts;
261 
262  td.out = out;
263  td.in = s->frames;
264  ctx->internal->execute(ctx, amplify_frame, &td, NULL, FFMIN(s->height[1], ff_filter_get_nb_threads(ctx)));
265 
266  return ff_filter_frame(outlink, out);
267 }
268 
269 #define OFFSET(x) offsetof(AmplifyContext, x)
270 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
271 
272 static const AVOption amplify_options[] = {
273  { "radius", "set radius", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=2}, 1, 63, .flags = FLAGS },
274  { "factor", "set factor", OFFSET(factor), AV_OPT_TYPE_FLOAT, {.dbl=2}, 0, UINT16_MAX, .flags = FLAGS },
275  { "threshold", "set threshold", OFFSET(threshold), AV_OPT_TYPE_FLOAT, {.dbl=10}, 0, UINT16_MAX, .flags = FLAGS },
276  { "tolerance", "set tolerance", OFFSET(tolerance), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, UINT16_MAX, .flags = FLAGS },
277  { "low", "set low limit for amplification", OFFSET(llimit), AV_OPT_TYPE_INT, {.i64=UINT16_MAX}, 0, UINT16_MAX, .flags = FLAGS },
278  { "high", "set high limit for amplification", OFFSET(hlimit), AV_OPT_TYPE_INT, {.i64=UINT16_MAX}, 0, UINT16_MAX, .flags = FLAGS },
279  { "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=7}, 0, 15, FLAGS },
280  { NULL },
281 };
282 
283 static const AVFilterPad inputs[] = {
284  {
285  .name = "default",
286  .type = AVMEDIA_TYPE_VIDEO,
287  .filter_frame = filter_frame,
288  },
289  { NULL }
290 };
291 
292 static const AVFilterPad outputs[] = {
293  {
294  .name = "default",
295  .type = AVMEDIA_TYPE_VIDEO,
296  .config_props = config_output,
297  },
298  { NULL }
299 };
300 
301 AVFILTER_DEFINE_CLASS(amplify);
302 
304  .name = "amplify",
305  .description = NULL_IF_CONFIG_SMALL("Amplify changes between successive video frames."),
306  .priv_size = sizeof(AmplifyContext),
307  .priv_class = &amplify_class,
309  .outputs = outputs,
310  .inputs = inputs,
311  .init = init,
312  .uninit = uninit,
314 };
#define NULL
Definition: coverity.c:32
AVFrame * out
Definition: af_adeclick.c:488
#define AV_PIX_FMT_YUV440P10
Definition: pixfmt.h:389
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:268
AVOption.
Definition: opt.h:246
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:397
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.
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:403
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:367
static const AVFilterPad inputs[]
Definition: vf_amplify.c:283
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:391
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
#define src
Definition: vp8dsp.c:254
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:244
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:368
#define OFFSET(x)
Definition: vf_amplify.c:269
#define FLAGS
Definition: vf_amplify.c:270
const char * name
Pad name.
Definition: internal.h:60
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:369
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
static av_cold int init(AVFilterContext *ctx)
Definition: vf_amplify.c:82
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
#define av_cold
Definition: attributes.h:82
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:361
float threshold
Definition: vf_amplify.c:36
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:402
static int query_formats(AVFilterContext *ctx)
Definition: vf_amplify.c:53
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
Definition: pixfmt.h:100
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:400
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:392
AVFrame ** in
Definition: vf_amplify.c:96
A filter pad used for either input or output.
Definition: internal.h:54
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:260
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:568
#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:202
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
void * priv
private data for use by the filter
Definition: avfilter.h:353
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:116
const char * arg
Definition: jacosubdec.c:66
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_amplify.c:227
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:390
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:385
AVFrame ** frames
Definition: vf_amplify.c:50
static const AVFilterPad outputs[]
Definition: vf_amplify.c:292
int linesize[4]
Definition: vf_amplify.c:47
#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
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
AVFormatContext * ctx
Definition: movenc.c:48
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
#define s(width, name)
Definition: cbs_vp9.c:257
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:386
static const AVOption amplify_options[]
Definition: vf_amplify.c:272
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:405
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:398
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:395
Used for passing data between threads.
Definition: af_adeclick.c:487
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:299
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_RN16(p)
Definition: intreadwrite.h:360
#define AV_PIX_FMT_GRAY14
Definition: pixfmt.h:370
#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
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:387
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
AVFilter ff_vf_amplify
Definition: vf_amplify.c:303
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
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
const char * name
Filter name.
Definition: avfilter.h:148
#define AV_PIX_FMT_YUV440P12
Definition: pixfmt.h:393
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:384
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:396
#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_YUV422P10
Definition: pixfmt.h:388
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:394
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:282
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 int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_amplify.c:239
#define avg(a, b, c, d)
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
Y , 8bpp.
Definition: pixfmt.h:74
planar 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 config_output(AVFilterLink *outlink)
Definition: vf_amplify.c:205
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
avfilter_execute_func * execute
Definition: internal.h:155
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2029
static av_always_inline int diff(const uint32_t a, const uint32_t b)
A list of supported formats for one end of a filter link.
Definition: formats.h:64
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:258
An instance of a filter.
Definition: avfilter.h:338
int height[4]
Definition: vf_amplify.c:48
FILE * out
Definition: movenc.c:54
#define av_freep(p)
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
float tolerance
Definition: vf_amplify.c:37
AVFrame * in
Definition: af_afftdn.c:1082
formats
Definition: signature.h:48
AVFILTER_DEFINE_CLASS(amplify)
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:338
internal API functions
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
int depth
Number of bits in the component.
Definition: pixdesc.h:58
static int amplify_frame(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_amplify.c:99
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:399
const AVPixFmtDescriptor * desc
Definition: vf_amplify.c:33
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
static av_always_inline av_const unsigned av_clip_uintp2_c(int a, int p)
Clip a signed integer to an unsigned power of two range.
Definition: common.h:229