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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  * Foreach pixel, if it's within threshold of the blurred value, make it closer.
30  * So now we have a smoothed and higher bitdepth version of all the shallow
31  * 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/opt.h"
39 #include "libavutil/pixdesc.h"
40 #include "avfilter.h"
41 #include "formats.h"
42 #include "gradfun.h"
43 #include "internal.h"
44 #include "video.h"
45 
46 DECLARE_ALIGNED(16, static const uint16_t, dither)[8][8] = {
47  {0x00,0x60,0x18,0x78,0x06,0x66,0x1E,0x7E},
48  {0x40,0x20,0x58,0x38,0x46,0x26,0x5E,0x3E},
49  {0x10,0x70,0x08,0x68,0x16,0x76,0x0E,0x6E},
50  {0x50,0x30,0x48,0x28,0x56,0x36,0x4E,0x2E},
51  {0x04,0x64,0x1C,0x7C,0x02,0x62,0x1A,0x7A},
52  {0x44,0x24,0x5C,0x3C,0x42,0x22,0x5A,0x3A},
53  {0x14,0x74,0x0C,0x6C,0x12,0x72,0x0A,0x6A},
54  {0x54,0x34,0x4C,0x2C,0x52,0x32,0x4A,0x2A},
55 };
56 
57 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)
58 {
59  int x;
60  for (x = 0; x < width; dc += x & 1, x++) {
61  int pix = src[x] << 7;
62  int delta = dc[0] - pix;
63  int m = abs(delta) * thresh >> 16;
64  m = FFMAX(0, 127 - m);
65  m = m * m * delta >> 14;
66  pix += m + dithers[x & 7];
67  dst[x] = av_clip_uint8(pix >> 7);
68  }
69 }
70 
71 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)
72 {
73  int x, v, old;
74  for (x = 0; x < width; x++) {
75  v = buf1[x] + src[2 * x] + src[2 * x + 1] + src[2 * x + src_linesize] + src[2 * x + 1 + src_linesize];
76  old = buf[x];
77  buf[x] = v;
78  dc[x] = v - old;
79  }
80 }
81 
82 static void filter(GradFunContext *ctx, uint8_t *dst, const uint8_t *src, int width, int height, int dst_linesize, int src_linesize, int r)
83 {
84  int bstride = FFALIGN(width, 16) / 2;
85  int y;
86  uint32_t dc_factor = (1 << 21) / (r * r);
87  uint16_t *dc = ctx->buf + 16;
88  uint16_t *buf = ctx->buf + bstride + 32;
89  int thresh = ctx->thresh;
90 
91  memset(dc, 0, (bstride + 16) * sizeof(*buf));
92  for (y = 0; y < r; y++)
93  ctx->blur_line(dc, buf + y * bstride, buf + (y - 1) * bstride, src + 2 * y * src_linesize, src_linesize, width / 2);
94  for (;;) {
95  if (y < height - r) {
96  int mod = ((y + r) / 2) % r;
97  uint16_t *buf0 = buf + mod * bstride;
98  uint16_t *buf1 = buf + (mod ? mod - 1 : r - 1) * bstride;
99  int x, v;
100  ctx->blur_line(dc, buf0, buf1, src + (y + r) * src_linesize, src_linesize, width / 2);
101  for (x = v = 0; x < r; x++)
102  v += dc[x];
103  for (; x < width / 2; x++) {
104  v += dc[x] - dc[x-r];
105  dc[x-r] = v * dc_factor >> 16;
106  }
107  for (; x < (width + r + 1) / 2; x++)
108  dc[x-r] = v * dc_factor >> 16;
109  for (x = -r / 2; x < 0; x++)
110  dc[x] = dc[0];
111  }
112  if (y == r) {
113  for (y = 0; y < r; y++)
114  ctx->filter_line(dst + y * dst_linesize, src + y * src_linesize, dc - r / 2, width, thresh, dither[y & 7]);
115  }
116  ctx->filter_line(dst + y * dst_linesize, src + y * src_linesize, dc - r / 2, width, thresh, dither[y & 7]);
117  if (++y >= height) break;
118  ctx->filter_line(dst + y * dst_linesize, src + y * src_linesize, dc - r / 2, width, thresh, dither[y & 7]);
119  if (++y >= height) break;
120  }
121  emms_c();
122 }
123 
124 static av_cold int init(AVFilterContext *ctx)
125 {
126  GradFunContext *s = ctx->priv;
127 
128  s->thresh = (1 << 15) / s->strength;
129  s->radius = av_clip((s->radius + 1) & ~1, 4, 32);
130 
133 
134  if (ARCH_X86)
136 
137  av_log(ctx, AV_LOG_VERBOSE, "threshold:%.2f radius:%d\n", s->strength, s->radius);
138 
139  return 0;
140 }
141 
142 static av_cold void uninit(AVFilterContext *ctx)
143 {
144  GradFunContext *s = ctx->priv;
145  av_freep(&s->buf);
146 }
147 
149 {
150  static const enum AVPixelFormat pix_fmts[] = {
157  };
158  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
159  if (!fmts_list)
160  return AVERROR(ENOMEM);
161  return ff_set_common_formats(ctx, fmts_list);
162 }
163 
164 static int config_input(AVFilterLink *inlink)
165 {
166  GradFunContext *s = inlink->dst->priv;
167  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
168  int hsub = desc->log2_chroma_w;
169  int vsub = desc->log2_chroma_h;
170 
171  av_freep(&s->buf);
172  s->buf = av_calloc((FFALIGN(inlink->w, 16) * (s->radius + 1) / 2 + 32), sizeof(*s->buf));
173  if (!s->buf)
174  return AVERROR(ENOMEM);
175 
176  s->chroma_w = FF_CEIL_RSHIFT(inlink->w, hsub);
177  s->chroma_h = FF_CEIL_RSHIFT(inlink->h, vsub);
178  s->chroma_r = av_clip(((((s->radius >> hsub) + (s->radius >> vsub)) / 2 ) + 1) & ~1, 4, 32);
179 
180  return 0;
181 }
182 
183 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
184 {
185  GradFunContext *s = inlink->dst->priv;
186  AVFilterLink *outlink = inlink->dst->outputs[0];
187  AVFrame *out;
188  int p, direct;
189 
190  if (av_frame_is_writable(in)) {
191  direct = 1;
192  out = in;
193  } else {
194  direct = 0;
195  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
196  if (!out) {
197  av_frame_free(&in);
198  return AVERROR(ENOMEM);
199  }
200  av_frame_copy_props(out, in);
201  }
202 
203  for (p = 0; p < 4 && in->data[p] && in->linesize[p]; p++) {
204  int w = inlink->w;
205  int h = inlink->h;
206  int r = s->radius;
207  if (p) {
208  w = s->chroma_w;
209  h = s->chroma_h;
210  r = s->chroma_r;
211  }
212 
213  if (FFMIN(w, h) > 2 * r)
214  filter(s, out->data[p], in->data[p], w, h, out->linesize[p], in->linesize[p], r);
215  else if (out->data[p] != in->data[p])
216  av_image_copy_plane(out->data[p], out->linesize[p], in->data[p], in->linesize[p], w, h);
217  }
218 
219  if (!direct)
220  av_frame_free(&in);
221 
222  return ff_filter_frame(outlink, out);
223 }
224 
225 #define OFFSET(x) offsetof(GradFunContext, x)
226 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
227 
228 static const AVOption gradfun_options[] = {
229  { "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 },
230  { "radius", "The neighborhood to fit the gradient to.", OFFSET(radius), AV_OPT_TYPE_INT, { .i64 = 16 }, 4, 32, FLAGS },
231  { NULL }
232 };
233 
234 AVFILTER_DEFINE_CLASS(gradfun);
235 
237  {
238  .name = "default",
239  .type = AVMEDIA_TYPE_VIDEO,
240  .config_props = config_input,
241  .filter_frame = filter_frame,
242  },
243  { NULL }
244 };
245 
247  {
248  .name = "default",
249  .type = AVMEDIA_TYPE_VIDEO,
250  },
251  { NULL }
252 };
253 
255  .name = "gradfun",
256  .description = NULL_IF_CONFIG_SMALL("Debands video quickly using gradients."),
257  .priv_size = sizeof(GradFunContext),
258  .priv_class = &gradfun_class,
259  .init = init,
260  .uninit = uninit,
262  .inputs = avfilter_vf_gradfun_inputs,
263  .outputs = avfilter_vf_gradfun_outputs,
265 };
#define NULL
Definition: coverity.c:32
float v
const char * s
Definition: avisynth_c.h:631
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2129
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
AVOption.
Definition: opt.h:255
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:68
misc image utilities
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:248
Main libavfilter public API header.
int radius
blur radius
Definition: gradfun.h:32
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:188
#define DECLARE_ALIGNED(n, t, v)
Definition: mem.h:53
Holds instance-specific information for gradfun.
Definition: gradfun.h:28
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:109
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:80
#define FFALIGN(x, a)
Definition: common.h:71
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
#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:451
const char * name
Pad name.
Definition: internal.h:69
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1158
int chroma_h
weight of the chroma planes
Definition: gradfun.h:34
uint8_t
#define av_cold
Definition: attributes.h:74
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_gradfun.c:183
float delta
AVOptions.
AVFilter ff_vf_gradfun
Definition: vf_gradfun.c:254
static int config_input(AVFilterLink *inlink)
Definition: vf_gradfun.c:164
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
static const AVFilterPad avfilter_vf_gradfun_outputs[]
Definition: vf_gradfun.c:246
#define av_log(a,...)
unsigned m
Definition: audioconvert.c:187
A filter pad used for either input or output.
Definition: internal.h:63
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_gradfun.c:142
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:542
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:89
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:148
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:82
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
const char * r
Definition: vf_curves.c:107
void * priv
private data for use by the filter
Definition: avfilter.h:654
#define FFMAX(a, b)
Definition: common.h:64
static const uint8_t dithers[8][8][8]
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:67
#define FFMIN(a, b)
Definition: common.h:66
float y
void(* blur_line)(uint16_t *dc, uint16_t *buf, const uint16_t *buf1, const uint8_t *src, int src_linesize, int width)
Definition: gradfun.h:39
#define FF_CEIL_RSHIFT(a, b)
Definition: common.h:57
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:57
void ff_gradfun_init_x86(GradFunContext *gf)
void(* filter_line)(uint8_t *dst, const uint8_t *src, const uint16_t *dc, int width, int thresh, const uint16_t *dithers)
DSP functions.
Definition: gradfun.h:38
uint16_t * buf
holds image data for blur algorithm passed into filter.
Definition: gradfun.h:36
static const uint16_t dither[8][8]
Definition: vf_gradfun.c:46
AVS_Value src
Definition: avisynth_c.h:482
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:493
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
void * buf
Definition: avisynth_c.h:553
static av_cold int init(AVFilterContext *ctx)
Definition: vf_gradfun.c:124
BYTE int const BYTE int int int height
Definition: avisynth_c.h:676
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:69
Filter definition.
Definition: avfilter.h:470
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:239
const char * name
Filter name.
Definition: avfilter.h:474
float strength
Definition: gradfun.h:30
static const AVFilterPad avfilter_vf_gradfun_inputs[]
Definition: vf_gradfun.c:236
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:648
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:209
void * av_calloc(size_t nmemb, size_t size)
Allocate a block of nmemb * size bytes with alignment suitable for all memory accesses (including vec...
Definition: mem.c:260
static int flags
Definition: cpu.c:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
#define FLAGS
Definition: vf_gradfun.c:226
static int query_formats(AVFilterContext *ctx)
Definition: vf_gradfun.c:148
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
Y , 8bpp.
Definition: pixfmt.h:71
int chroma_w
width of the chroma planes
Definition: gradfun.h:33
common internal and external API header
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:70
int thresh
threshold for gradient algorithm
Definition: gradfun.h:31
A list of supported formats for one end of a filter link.
Definition: formats.h:64
int chroma_r
blur radius for the chroma planes
Definition: gradfun.h:35
AVFILTER_DEFINE_CLASS(gradfun)
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
An instance of a filter.
Definition: avfilter.h:633
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> dc
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:71
#define av_freep(p)
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:101
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:273
internal API functions
#define OFFSET(x)
Definition: vf_gradfun.c:225
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:553
static const AVOption gradfun_options[]
Definition: vf_gradfun.c:228
static int width