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vf_vignette.c
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1 /*
2  * Copyright (c) 2013 Clément Bœsch
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 <float.h> /* DBL_MAX */
22 
23 #include "libavutil/opt.h"
24 #include "libavutil/eval.h"
25 #include "libavutil/avassert.h"
26 #include "libavutil/pixdesc.h"
27 #include "avfilter.h"
28 #include "formats.h"
29 #include "internal.h"
30 #include "video.h"
31 
32 static const char *const var_names[] = {
33  "w", // stream width
34  "h", // stream height
35  "n", // frame count
36  "pts", // presentation timestamp expressed in AV_TIME_BASE units
37  "r", // frame rate
38  "t", // timestamp expressed in seconds
39  "tb", // timebase
40  NULL
41 };
42 
43 enum var_name {
52 };
53 
54 enum EvalMode {
58 };
59 
60 typedef struct {
61  const AVClass *class;
63  int backward;
64  int eval_mode; ///< EvalMode
65 #define DEF_EXPR_FIELDS(name) AVExpr *name##_pexpr; char *name##_expr; double name
66  DEF_EXPR_FIELDS(angle);
67  DEF_EXPR_FIELDS(x0);
68  DEF_EXPR_FIELDS(y0);
69  double var_values[VAR_NB];
70  float *fmap;
72  double dmax;
73  float xscale, yscale;
74  uint32_t dither;
75  int do_dither;
79 
80 #define OFFSET(x) offsetof(VignetteContext, x)
81 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
82 static const AVOption vignette_options[] = {
83  { "angle", "set lens angle", OFFSET(angle_expr), AV_OPT_TYPE_STRING, {.str="PI/5"}, .flags = FLAGS },
84  { "a", "set lens angle", OFFSET(angle_expr), AV_OPT_TYPE_STRING, {.str="PI/5"}, .flags = FLAGS },
85  { "x0", "set circle center position on x-axis", OFFSET(x0_expr), AV_OPT_TYPE_STRING, {.str="w/2"}, .flags = FLAGS },
86  { "y0", "set circle center position on y-axis", OFFSET(y0_expr), AV_OPT_TYPE_STRING, {.str="h/2"}, .flags = FLAGS },
87  { "mode", "set forward/backward mode", OFFSET(backward), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, FLAGS, "mode" },
88  { "forward", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 0}, INT_MIN, INT_MAX, FLAGS, "mode"},
89  { "backward", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = 1}, INT_MIN, INT_MAX, FLAGS, "mode"},
90  { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_INIT}, 0, EVAL_MODE_NB-1, FLAGS, "eval" },
91  { "init", "eval expressions once during initialization", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_INIT}, .flags = FLAGS, .unit = "eval" },
92  { "frame", "eval expressions for each frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = FLAGS, .unit = "eval" },
93  { "dither", "set dithering", OFFSET(do_dither), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, FLAGS },
94  { "aspect", "set aspect ratio", OFFSET(aspect), AV_OPT_TYPE_RATIONAL, {.dbl = 1}, 0, DBL_MAX, .flags = FLAGS },
95  { NULL }
96 };
97 
98 AVFILTER_DEFINE_CLASS(vignette);
99 
100 static av_cold int init(AVFilterContext *ctx)
101 {
102  VignetteContext *s = ctx->priv;
103 
104 #define PARSE_EXPR(name) do { \
105  int ret = av_expr_parse(&s->name##_pexpr, s->name##_expr, var_names, \
106  NULL, NULL, NULL, NULL, 0, ctx); \
107  if (ret < 0) { \
108  av_log(ctx, AV_LOG_ERROR, "Unable to parse expression for '" \
109  AV_STRINGIFY(name) "'\n"); \
110  return ret; \
111  } \
112 } while (0)
113 
114  PARSE_EXPR(angle);
115  PARSE_EXPR(x0);
116  PARSE_EXPR(y0);
117  return 0;
118 }
119 
120 static av_cold void uninit(AVFilterContext *ctx)
121 {
122  VignetteContext *s = ctx->priv;
123  av_freep(&s->fmap);
124  av_expr_free(s->angle_pexpr);
125  av_expr_free(s->x0_pexpr);
126  av_expr_free(s->y0_pexpr);
127 }
128 
130 {
131  static const enum AVPixelFormat pix_fmts[] = {
138  };
139  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
140  if (!fmts_list)
141  return AVERROR(ENOMEM);
142  return ff_set_common_formats(ctx, fmts_list);
143 }
144 
145 static double get_natural_factor(const VignetteContext *s, int x, int y)
146 {
147  const int xx = (x - s->x0) * s->xscale;
148  const int yy = (y - s->y0) * s->yscale;
149  const double dnorm = hypot(xx, yy) / s->dmax;
150  if (dnorm > 1) {
151  return 0;
152  } else {
153  const double c = cos(s->angle * dnorm);
154  return (c*c)*(c*c); // do not remove braces, it helps compilers
155  }
156 }
157 
158 #define TS2D(ts) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts))
159 #define TS2T(ts, tb) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts) * av_q2d(tb))
160 
162 {
163  int x, y;
164  float *dst = s->fmap;
165  int dst_linesize = s->fmap_linesize;
166 
167  if (frame) {
168  s->var_values[VAR_N] = inlink->frame_count;
169  s->var_values[VAR_T] = TS2T(frame->pts, inlink->time_base);
170  s->var_values[VAR_PTS] = TS2D(frame->pts);
171  } else {
172  s->var_values[VAR_N] = NAN;
173  s->var_values[VAR_T] = NAN;
174  s->var_values[VAR_PTS] = NAN;
175  }
176 
177  s->angle = av_expr_eval(s->angle_pexpr, s->var_values, NULL);
178  s->x0 = av_expr_eval(s->x0_pexpr, s->var_values, NULL);
179  s->y0 = av_expr_eval(s->y0_pexpr, s->var_values, NULL);
180 
181  if (isnan(s->x0) || isnan(s->y0) || isnan(s->angle))
183 
184  s->angle = av_clipf(s->angle, 0, M_PI_2);
185 
186  if (s->backward) {
187  for (y = 0; y < inlink->h; y++) {
188  for (x = 0; x < inlink->w; x++)
189  dst[x] = 1. / get_natural_factor(s, x, y);
190  dst += dst_linesize;
191  }
192  } else {
193  for (y = 0; y < inlink->h; y++) {
194  for (x = 0; x < inlink->w; x++)
195  dst[x] = get_natural_factor(s, x, y);
196  dst += dst_linesize;
197  }
198  }
199 }
200 
201 static inline double get_dither_value(VignetteContext *s)
202 {
203  double dv = 0;
204  if (s->do_dither) {
205  dv = s->dither / (double)(1LL<<32);
206  s->dither = s->dither * 1664525 + 1013904223;
207  }
208  return dv;
209 }
210 
211 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
212 {
213  unsigned x, y, direct = 0;
214  AVFilterContext *ctx = inlink->dst;
215  VignetteContext *s = ctx->priv;
216  AVFilterLink *outlink = ctx->outputs[0];
217  AVFrame *out;
218 
219  if (av_frame_is_writable(in)) {
220  direct = 1;
221  out = in;
222  } else {
223  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
224  if (!out) {
225  av_frame_free(&in);
226  return AVERROR(ENOMEM);
227  }
228  av_frame_copy_props(out, in);
229  }
230 
231  if (s->eval_mode == EVAL_MODE_FRAME)
232  update_context(s, inlink, in);
233 
234  if (s->desc->flags & AV_PIX_FMT_FLAG_RGB) {
235  uint8_t *dst = out->data[0];
236  const uint8_t *src = in ->data[0];
237  const float *fmap = s->fmap;
238  const int dst_linesize = out->linesize[0];
239  const int src_linesize = in ->linesize[0];
240  const int fmap_linesize = s->fmap_linesize;
241 
242  for (y = 0; y < inlink->h; y++) {
243  uint8_t *dstp = dst;
244  const uint8_t *srcp = src;
245 
246  for (x = 0; x < inlink->w; x++, dstp += 3, srcp += 3) {
247  const float f = fmap[x];
248 
249  dstp[0] = av_clip_uint8(srcp[0] * f + get_dither_value(s));
250  dstp[1] = av_clip_uint8(srcp[1] * f + get_dither_value(s));
251  dstp[2] = av_clip_uint8(srcp[2] * f + get_dither_value(s));
252  }
253  dst += dst_linesize;
254  src += src_linesize;
255  fmap += fmap_linesize;
256  }
257  } else {
258  int plane;
259 
260  for (plane = 0; plane < 4 && in->data[plane] && in->linesize[plane]; plane++) {
261  uint8_t *dst = out->data[plane];
262  const uint8_t *src = in ->data[plane];
263  const float *fmap = s->fmap;
264  const int dst_linesize = out->linesize[plane];
265  const int src_linesize = in ->linesize[plane];
266  const int fmap_linesize = s->fmap_linesize;
267  const int chroma = plane == 1 || plane == 2;
268  const int hsub = chroma ? s->desc->log2_chroma_w : 0;
269  const int vsub = chroma ? s->desc->log2_chroma_h : 0;
270  const int w = FF_CEIL_RSHIFT(inlink->w, hsub);
271  const int h = FF_CEIL_RSHIFT(inlink->h, vsub);
272 
273  for (y = 0; y < h; y++) {
274  uint8_t *dstp = dst;
275  const uint8_t *srcp = src;
276 
277  for (x = 0; x < w; x++) {
278  const double dv = get_dither_value(s);
279  if (chroma) *dstp++ = av_clip_uint8(fmap[x << hsub] * (*srcp++ - 127) + 127 + dv);
280  else *dstp++ = av_clip_uint8(fmap[x ] * *srcp++ + dv);
281  }
282  dst += dst_linesize;
283  src += src_linesize;
284  fmap += fmap_linesize << vsub;
285  }
286  }
287  }
288 
289  if (!direct)
290  av_frame_free(&in);
291  return ff_filter_frame(outlink, out);
292 }
293 
294 static int config_props(AVFilterLink *inlink)
295 {
296  VignetteContext *s = inlink->dst->priv;
297  AVRational sar = inlink->sample_aspect_ratio;
298 
299  s->desc = av_pix_fmt_desc_get(inlink->format);
300  s->var_values[VAR_W] = inlink->w;
301  s->var_values[VAR_H] = inlink->h;
302  s->var_values[VAR_TB] = av_q2d(inlink->time_base);
303  s->var_values[VAR_R] = inlink->frame_rate.num == 0 || inlink->frame_rate.den == 0 ?
304  NAN : av_q2d(inlink->frame_rate);
305 
306  if (!sar.num || !sar.den)
307  sar.num = sar.den = 1;
308  if (sar.num > sar.den) {
309  s->xscale = av_q2d(av_div_q(sar, s->aspect));
310  s->yscale = 1;
311  } else {
312  s->yscale = av_q2d(av_div_q(s->aspect, sar));
313  s->xscale = 1;
314  }
315  s->dmax = hypot(inlink->w / 2., inlink->h / 2.);
316  av_log(s, AV_LOG_DEBUG, "xscale=%f yscale=%f dmax=%f\n",
317  s->xscale, s->yscale, s->dmax);
318 
319  s->fmap_linesize = FFALIGN(inlink->w, 32);
320  s->fmap = av_malloc_array(s->fmap_linesize, inlink->h * sizeof(*s->fmap));
321  if (!s->fmap)
322  return AVERROR(ENOMEM);
323 
324  if (s->eval_mode == EVAL_MODE_INIT)
325  update_context(s, inlink, NULL);
326 
327  return 0;
328 }
329 
330 static const AVFilterPad vignette_inputs[] = {
331  {
332  .name = "default",
333  .type = AVMEDIA_TYPE_VIDEO,
334  .filter_frame = filter_frame,
335  .config_props = config_props,
336  },
337  { NULL }
338 };
339 
340 static const AVFilterPad vignette_outputs[] = {
341  {
342  .name = "default",
343  .type = AVMEDIA_TYPE_VIDEO,
344  },
345  { NULL }
346 };
347 
349  .name = "vignette",
350  .description = NULL_IF_CONFIG_SMALL("Make or reverse a vignette effect."),
351  .priv_size = sizeof(VignetteContext),
352  .init = init,
353  .uninit = uninit,
355  .inputs = vignette_inputs,
356  .outputs = vignette_outputs,
357  .priv_class = &vignette_class,
359 };
int plane
Definition: avisynth_c.h:291
#define NULL
Definition: coverity.c:32
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
AVFilter ff_vf_vignette
Definition: vf_vignette.c:348
AVOption.
Definition: opt.h:255
static const AVFilterPad vignette_outputs[]
Definition: vf_vignette.c:340
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:68
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:248
Main libavfilter public API header.
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:65
static const AVOption vignette_options[]
Definition: vf_vignette.c:82
#define TS2D(ts)
Definition: vf_vignette.c:158
int num
numerator
Definition: rational.h:44
#define TS2T(ts, tb)
Definition: vf_vignette.c:159
static double get_dither_value(VignetteContext *s)
Definition: vf_vignette.c:201
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
static av_cold int init(AVFilterContext *ctx)
Definition: vf_vignette.c:100
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:80
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_vignette.c:120
#define FFALIGN(x, a)
Definition: common.h:86
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
BYTE int const BYTE * srcp
Definition: avisynth_c.h:676
const char * name
Pad name.
Definition: internal.h:69
static const AVFilterPad vignette_inputs[]
Definition: vf_vignette.c:330
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1158
uint8_t
#define av_cold
Definition: attributes.h:74
AVOptions.
static av_always_inline av_const int isnan(float x)
Definition: libm.h:96
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:257
static double get_natural_factor(const VignetteContext *s, int x, int y)
Definition: vf_vignette.c:145
static AVFrame * frame
static double av_q2d(AVRational a)
Convert rational to double.
Definition: rational.h:80
static int query_formats(AVFilterContext *ctx)
Definition: vf_vignette.c:129
#define DEF_EXPR_FIELDS(name)
Definition: vf_vignette.c:65
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:63
AVRational scale
Definition: vf_vignette.c:77
#define FLAGS
Definition: vf_vignette.c:81
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
BYTE * dstp
Definition: avisynth_c.h:676
#define AVERROR(e)
Definition: error.h:43
#define AV_PIX_FMT_FLAG_RGB
The pixel format contains RGB-like data (as opposed to YUV/grayscale).
Definition: pixdesc.h:131
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:148
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
AVRational av_div_q(AVRational b, AVRational c)
Divide one rational by another.
Definition: rational.c:88
void * priv
private data for use by the filter
Definition: avfilter.h:654
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
simple assert() macros that are a bit more flexible than ISO C assert().
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:67
var_name
Definition: aeval.c:46
double var_values[VAR_NB]
Definition: vf_vignette.c:69
float y
#define M_PI_2
Definition: mathematics.h:49
#define FF_CEIL_RSHIFT(a, b)
Definition: common.h:57
#define PARSE_EXPR(name)
#define OFFSET(x)
Definition: vf_vignette.c:80
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:66
AVRational aspect
Definition: vf_vignette.c:76
EvalMode
Definition: af_volume.h:39
static int config_props(AVFilterLink *inlink)
Definition: vf_vignette.c:294
AVFILTER_DEFINE_CLASS(vignette)
AVS_Value src
Definition: avisynth_c.h:482
static void update_context(VignetteContext *s, AVFilterLink *inlink, AVFrame *frame)
Definition: vf_vignette.c:161
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:313
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
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_vignette.c:211
uint8_t flags
Definition: pixdesc.h:90
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
int eval_mode
EvalMode.
Definition: vf_vignette.c:64
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
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:69
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:470
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:239
rational number numerator/denominator
Definition: rational.h:43
static void chroma(WaveformContext *s, AVFrame *in, AVFrame *out, int component, int intensity, int offset, int column)
Definition: vf_waveform.c:785
const char * name
Filter name.
Definition: avfilter.h:474
const AVPixFmtDescriptor * desc
Definition: vf_vignette.c:62
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:648
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:209
uint32_t dither
Definition: vf_vignette.c:74
static int flags
Definition: cpu.c:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
Y , 8bpp.
Definition: pixfmt.h:71
static double c[64]
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:70
int den
denominator
Definition: rational.h:45
#define NAN
Definition: math.h:28
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:708
static const char *const var_names[]
Definition: vf_vignette.c:32
A list of supported formats for one end of a filter link.
Definition: formats.h:64
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
#define av_freep(p)
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:101
#define av_malloc_array(a, b)
internal API functions
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
simple arithmetic expression evaluator