FFmpeg  4.4.4
vf_gradfun.c
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1 /*
2  * Copyright (c) 2010 Nolan Lum <nol888@gmail.com>
3  * Copyright (c) 2009 Loren Merritt <lorenm@u.washington.edu>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * gradfun debanding filter, ported from MPlayer
25  * libmpcodecs/vf_gradfun.c
26  *
27  * Apply a boxblur debanding algorithm (based on the gradfun2db
28  * AviSynth filter by prunedtree).
29  * For each pixel, if it is within the threshold of the blurred value, make it
30  * closer. So now we have a smoothed and higher bitdepth version of all the
31  * shallow gradients, while leaving detailed areas untouched.
32  * Dither it back to 8bit.
33  */
34 
35 #include "libavutil/imgutils.h"
36 #include "libavutil/common.h"
37 #include "libavutil/cpu.h"
38 #include "libavutil/mem_internal.h"
39 #include "libavutil/opt.h"
40 #include "libavutil/pixdesc.h"
41 #include "avfilter.h"
42 #include "formats.h"
43 #include "gradfun.h"
44 #include "internal.h"
45 #include "video.h"
46 
47 DECLARE_ALIGNED(16, static const uint16_t, dither)[8][8] = {
48  {0x00,0x60,0x18,0x78,0x06,0x66,0x1E,0x7E},
49  {0x40,0x20,0x58,0x38,0x46,0x26,0x5E,0x3E},
50  {0x10,0x70,0x08,0x68,0x16,0x76,0x0E,0x6E},
51  {0x50,0x30,0x48,0x28,0x56,0x36,0x4E,0x2E},
52  {0x04,0x64,0x1C,0x7C,0x02,0x62,0x1A,0x7A},
53  {0x44,0x24,0x5C,0x3C,0x42,0x22,0x5A,0x3A},
54  {0x14,0x74,0x0C,0x6C,0x12,0x72,0x0A,0x6A},
55  {0x54,0x34,0x4C,0x2C,0x52,0x32,0x4A,0x2A},
56 };
57 
58 void ff_gradfun_filter_line_c(uint8_t *dst, const uint8_t *src, const uint16_t *dc, int width, int thresh, const uint16_t *dithers)
59 {
60  int x;
61  for (x = 0; x < width; dc += x & 1, x++) {
62  int pix = src[x] << 7;
63  int delta = dc[0] - pix;
64  int m = abs(delta) * thresh >> 16;
65  m = FFMAX(0, 127 - m);
66  m = m * m * delta >> 14;
67  pix += m + dithers[x & 7];
68  dst[x] = av_clip_uint8(pix >> 7);
69  }
70 }
71 
72 void ff_gradfun_blur_line_c(uint16_t *dc, uint16_t *buf, const uint16_t *buf1, const uint8_t *src, int src_linesize, int width)
73 {
74  int x, v, old;
75  for (x = 0; x < width; x++) {
76  v = buf1[x] + src[2 * x] + src[2 * x + 1] + src[2 * x + src_linesize] + src[2 * x + 1 + src_linesize];
77  old = buf[x];
78  buf[x] = v;
79  dc[x] = v - old;
80  }
81 }
82 
83 static void filter(GradFunContext *ctx, uint8_t *dst, const uint8_t *src, int width, int height, int dst_linesize, int src_linesize, int r)
84 {
85  int bstride = FFALIGN(width, 16) / 2;
86  int y;
87  uint32_t dc_factor = (1 << 21) / (r * r);
88  uint16_t *dc = ctx->buf + 16;
89  uint16_t *buf = ctx->buf + bstride + 32;
90  int thresh = ctx->thresh;
91 
92  memset(dc, 0, (bstride + 16) * sizeof(*buf));
93  for (y = 0; y < r; y++)
94  ctx->blur_line(dc, buf + y * bstride, buf + (y - 1) * bstride, src + 2 * y * src_linesize, src_linesize, width / 2);
95  for (;;) {
96  if (y < height - r) {
97  int mod = ((y + r) / 2) % r;
98  uint16_t *buf0 = buf + mod * bstride;
99  uint16_t *buf1 = buf + (mod ? mod - 1 : r - 1) * bstride;
100  int x, v;
101  ctx->blur_line(dc, buf0, buf1, src + (y + r) * src_linesize, src_linesize, width / 2);
102  for (x = v = 0; x < r; x++)
103  v += dc[x];
104  for (; x < width / 2; x++) {
105  v += dc[x] - dc[x-r];
106  dc[x-r] = v * dc_factor >> 16;
107  }
108  for (; x < (width + r + 1) / 2; x++)
109  dc[x-r] = v * dc_factor >> 16;
110  for (x = -r / 2; x < 0; x++)
111  dc[x] = dc[0];
112  }
113  if (y == r) {
114  for (y = 0; y < r; y++)
115  ctx->filter_line(dst + y * dst_linesize, src + y * src_linesize, dc - r / 2, width, thresh, dither[y & 7]);
116  }
117  ctx->filter_line(dst + y * dst_linesize, src + y * src_linesize, dc - r / 2, width, thresh, dither[y & 7]);
118  if (++y >= height) break;
119  ctx->filter_line(dst + y * dst_linesize, src + y * src_linesize, dc - r / 2, width, thresh, dither[y & 7]);
120  if (++y >= height) break;
121  }
122  emms_c();
123 }
124 
126 {
127  GradFunContext *s = ctx->priv;
128 
129  s->thresh = (1 << 15) / s->strength;
130  s->radius = av_clip((s->radius + 1) & ~1, 4, 32);
131 
132  s->blur_line = ff_gradfun_blur_line_c;
133  s->filter_line = ff_gradfun_filter_line_c;
134 
135  if (ARCH_X86)
137 
138  av_log(ctx, AV_LOG_VERBOSE, "threshold:%.2f radius:%d\n", s->strength, s->radius);
139 
140  return 0;
141 }
142 
144 {
145  GradFunContext *s = ctx->priv;
146  av_freep(&s->buf);
147 }
148 
150 {
151  static const enum AVPixelFormat pix_fmts[] = {
158  };
160  if (!fmts_list)
161  return AVERROR(ENOMEM);
162  return ff_set_common_formats(ctx, fmts_list);
163 }
164 
165 static int config_input(AVFilterLink *inlink)
166 {
167  GradFunContext *s = inlink->dst->priv;
169  int hsub = desc->log2_chroma_w;
170  int vsub = desc->log2_chroma_h;
171 
172  av_freep(&s->buf);
173  s->buf = av_calloc((FFALIGN(inlink->w, 16) * (s->radius + 1) / 2 + 32), sizeof(*s->buf));
174  if (!s->buf)
175  return AVERROR(ENOMEM);
176 
177  s->chroma_w = AV_CEIL_RSHIFT(inlink->w, hsub);
178  s->chroma_h = AV_CEIL_RSHIFT(inlink->h, vsub);
179  s->chroma_r = av_clip(((((s->radius >> hsub) + (s->radius >> vsub)) / 2 ) + 1) & ~1, 4, 32);
180 
181  return 0;
182 }
183 
184 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
185 {
186  GradFunContext *s = inlink->dst->priv;
187  AVFilterLink *outlink = inlink->dst->outputs[0];
188  AVFrame *out;
189  int p, direct;
190 
191  if (av_frame_is_writable(in)) {
192  direct = 1;
193  out = in;
194  } else {
195  direct = 0;
196  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
197  if (!out) {
198  av_frame_free(&in);
199  return AVERROR(ENOMEM);
200  }
202  }
203 
204  for (p = 0; p < 4 && in->data[p] && in->linesize[p]; p++) {
205  int w = inlink->w;
206  int h = inlink->h;
207  int r = s->radius;
208  if (p) {
209  w = s->chroma_w;
210  h = s->chroma_h;
211  r = s->chroma_r;
212  }
213 
214  if (FFMIN(w, h) > 2 * r)
215  filter(s, out->data[p], in->data[p], w, h, out->linesize[p], in->linesize[p], r);
216  else if (out->data[p] != in->data[p])
217  av_image_copy_plane(out->data[p], out->linesize[p], in->data[p], in->linesize[p], w, h);
218  }
219 
220  if (!direct)
221  av_frame_free(&in);
222 
223  return ff_filter_frame(outlink, out);
224 }
225 
226 #define OFFSET(x) offsetof(GradFunContext, x)
227 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
228 
229 static const AVOption gradfun_options[] = {
230  { "strength", "The maximum amount by which the filter will change any one pixel.", OFFSET(strength), AV_OPT_TYPE_FLOAT, { .dbl = 1.2 }, 0.51, 64, FLAGS },
231  { "radius", "The neighborhood to fit the gradient to.", OFFSET(radius), AV_OPT_TYPE_INT, { .i64 = 16 }, 4, 32, FLAGS },
232  { NULL }
233 };
234 
236 
238  {
239  .name = "default",
240  .type = AVMEDIA_TYPE_VIDEO,
241  .config_props = config_input,
242  .filter_frame = filter_frame,
243  },
244  { NULL }
245 };
246 
248  {
249  .name = "default",
250  .type = AVMEDIA_TYPE_VIDEO,
251  },
252  { NULL }
253 };
254 
256  .name = "gradfun",
257  .description = NULL_IF_CONFIG_SMALL("Debands video quickly using gradients."),
258  .priv_size = sizeof(GradFunContext),
259  .priv_class = &gradfun_class,
260  .init = init,
261  .uninit = uninit,
266 };
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
#define av_cold
Definition: attributes.h:88
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-> dc
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
uint8_t
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1096
Main libavfilter public API header.
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define s(width, name)
Definition: cbs_vp9.c:257
common internal and external API header
#define FFMIN(a, b)
Definition: common.h:105
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
#define av_clip
Definition: common.h:122
#define FFMAX(a, b)
Definition: common.h:103
#define av_clip_uint8
Definition: common.h:128
#define ARCH_X86
Definition: config.h:39
#define NULL
Definition: coverity.c:32
#define abs(x)
Definition: cuda_runtime.h:35
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:587
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:286
void ff_gradfun_init_x86(GradFunContext *gf)
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:228
#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
#define AVERROR(e)
Definition: error.h:43
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:594
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:658
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:245
#define DECLARE_ALIGNED(n, t, v)
Declare a variable that is aligned in memory.
Definition: mem.h:117
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
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:373
misc image utilities
static void direct(const float *in, const FFTComplex *ir, int len, float *out)
Definition: af_afir.c:60
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
#define emms_c()
Definition: internal.h:54
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:309
const char * desc
Definition: libsvtav1.c:79
uint8_t w
Definition: llviddspenc.c:39
#define FFALIGN(x, a)
Definition: macros.h:48
AVOptions.
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
@ 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_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
@ AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
An instance of a filter.
Definition: avfilter.h:341
void * priv
private data for use by the filter
Definition: avfilter.h:356
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:353
A list of supported formats for one end of a filter link.
Definition: formats.h:65
A filter pad used for either input or output.
Definition: internal.h:54
const char * name
Pad name.
Definition: internal.h:60
Filter definition.
Definition: avfilter.h:145
const char * name
Filter name.
Definition: avfilter.h:149
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
AVOption.
Definition: opt.h:248
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
Holds instance-specific information for gradfun.
Definition: gradfun.h:28
static const uint8_t dithers[8][8][8]
#define av_freep(p)
#define av_log(a,...)
#define src
Definition: vp8dsp.c:255
FILE * out
Definition: movenc.c:54
AVFormatContext * ctx
Definition: movenc.c:48
#define height
#define width
const char * r
Definition: vf_curves.c:116
AVFilter ff_vf_gradfun
Definition: vf_gradfun.c:255
static void filter(GradFunContext *ctx, uint8_t *dst, const uint8_t *src, int width, int height, int dst_linesize, int src_linesize, int r)
Definition: vf_gradfun.c:83
void ff_gradfun_blur_line_c(uint16_t *dc, uint16_t *buf, const uint16_t *buf1, const uint8_t *src, int src_linesize, int width)
Definition: vf_gradfun.c:72
static int query_formats(AVFilterContext *ctx)
Definition: vf_gradfun.c:149
static int config_input(AVFilterLink *inlink)
Definition: vf_gradfun.c:165
static const AVOption gradfun_options[]
Definition: vf_gradfun.c:229
#define FLAGS
Definition: vf_gradfun.c:227
static const AVFilterPad avfilter_vf_gradfun_inputs[]
Definition: vf_gradfun.c:237
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_gradfun.c:184
static const AVFilterPad avfilter_vf_gradfun_outputs[]
Definition: vf_gradfun.c:247
static av_cold int init(AVFilterContext *ctx)
Definition: vf_gradfun.c:125
void ff_gradfun_filter_line_c(uint8_t *dst, const uint8_t *src, const uint16_t *dc, int width, int thresh, const uint16_t *dithers)
Definition: vf_gradfun.c:58
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_gradfun.c:143
#define OFFSET(x)
Definition: vf_gradfun.c:226
AVFILTER_DEFINE_CLASS(gradfun)
static const uint16_t dither[8][8]
Definition: vf_gradfun.c:47
static void hsub(htype *dst, const htype *src, int bins)
Definition: vf_median.c:75
static int mod(int a, int b)
Modulo operation with only positive remainders.
Definition: vf_v360.c:747
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:104
float delta