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vf_fade.c
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1 /*
2  * Copyright (c) 2010 Brandon Mintern
3  * Copyright (c) 2007 Bobby Bingham
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  * video fade filter
25  * based heavily on vf_negate.c by Bobby Bingham
26  */
27 
28 #include "libavutil/avassert.h"
29 #include "libavutil/avstring.h"
30 #include "libavutil/common.h"
31 #include "libavutil/eval.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/pixdesc.h"
34 #include "avfilter.h"
35 #include "drawutils.h"
36 #include "formats.h"
37 #include "internal.h"
38 #include "video.h"
39 
40 #define R 0
41 #define G 1
42 #define B 2
43 #define A 3
44 
45 #define Y 0
46 #define U 1
47 #define V 2
48 
49 #define FADE_IN 0
50 #define FADE_OUT 1
51 
52 typedef struct FadeContext {
53  const AVClass *class;
54  int type;
57  int hsub, vsub, bpp;
61  int alpha;
62  uint64_t start_time, duration;
64  uint8_t color_rgba[4]; ///< fade color
65  int black_fade; ///< if color_rgba is black
66 } FadeContext;
67 
68 static av_cold int init(AVFilterContext *ctx)
69 {
70  FadeContext *s = ctx->priv;
71 
72  s->fade_per_frame = (1 << 16) / s->nb_frames;
73  s->fade_state = VF_FADE_WAITING;
74 
75  if (s->duration != 0) {
76  // If duration (seconds) is non-zero, assume that we are not fading based on frames
77  s->nb_frames = 0; // Mostly to clean up logging
78  }
79 
80  // Choose what to log. If both time-based and frame-based options, both lines will be in the log
81  if (s->start_frame || s->nb_frames) {
83  "type:%s start_frame:%d nb_frames:%d alpha:%d\n",
84  s->type == FADE_IN ? "in" : "out", s->start_frame,
85  s->nb_frames,s->alpha);
86  }
87  if (s->start_time || s->duration) {
89  "type:%s start_time:%f duration:%f alpha:%d\n",
90  s->type == FADE_IN ? "in" : "out", (s->start_time / (double)AV_TIME_BASE),
91  (s->duration / (double)AV_TIME_BASE),s->alpha);
92  }
93 
94  s->black_fade = !memcmp(s->color_rgba, "\x00\x00\x00\xff", 4);
95  return 0;
96 }
97 
99 {
100  const FadeContext *s = ctx->priv;
101  static const enum AVPixelFormat pix_fmts[] = {
111  };
112  static const enum AVPixelFormat pix_fmts_rgb[] = {
117  };
118 
119  if (s->black_fade)
121  else
122  ff_set_common_formats(ctx, ff_make_format_list(pix_fmts_rgb));
123  return 0;
124 }
125 
126 const static enum AVPixelFormat studio_level_pix_fmts[] = {
131 };
132 
133 static int config_props(AVFilterLink *inlink)
134 {
135  FadeContext *s = inlink->dst->priv;
136  const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format);
137 
138  s->hsub = pixdesc->log2_chroma_w;
139  s->vsub = pixdesc->log2_chroma_h;
140 
141  s->bpp = pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR ?
142  1 :
143  av_get_bits_per_pixel(pixdesc) >> 3;
144  s->alpha &= !!(pixdesc->flags & AV_PIX_FMT_FLAG_ALPHA);
145  s->is_packed_rgb = ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0;
146 
147  /* use CCIR601/709 black level for studio-level pixel non-alpha components */
148  s->black_level =
149  ff_fmt_is_in(inlink->format, studio_level_pix_fmts) && !s->alpha ? 16 : 0;
150  /* 32768 = 1 << 15, it is an integer representation
151  * of 0.5 and is for rounding. */
152  s->black_level_scaled = (s->black_level << 16) + 32768;
153  return 0;
154 }
155 
157  int slice_start, int slice_end,
158  int do_alpha, int step)
159 {
160  int i, j;
161  const uint8_t r_idx = s->rgba_map[R];
162  const uint8_t g_idx = s->rgba_map[G];
163  const uint8_t b_idx = s->rgba_map[B];
164  const uint8_t a_idx = s->rgba_map[A];
165  const uint8_t *c = s->color_rgba;
166 
167  for (i = slice_start; i < slice_end; i++) {
168  uint8_t *p = frame->data[0] + i * frame->linesize[0];
169  for (j = 0; j < frame->width; j++) {
170 #define INTERP(c_name, c_idx) av_clip_uint8(((c[c_idx]<<16) + ((int)p[c_name] - (int)c[c_idx]) * s->factor + (1<<15)) >> 16)
171  p[r_idx] = INTERP(r_idx, 0);
172  p[g_idx] = INTERP(g_idx, 1);
173  p[b_idx] = INTERP(b_idx, 2);
174  if (do_alpha)
175  p[a_idx] = INTERP(a_idx, 3);
176  p += step;
177  }
178  }
179 }
180 
181 static int filter_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr,
182  int nb_jobs)
183 {
184  FadeContext *s = ctx->priv;
185  AVFrame *frame = arg;
186  int slice_start = (frame->height * jobnr ) / nb_jobs;
187  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
188 
189  if (s->alpha) filter_rgb(s, frame, slice_start, slice_end, 1, 4);
190  else if (s->bpp == 3) filter_rgb(s, frame, slice_start, slice_end, 0, 3);
191  else if (s->bpp == 4) filter_rgb(s, frame, slice_start, slice_end, 0, 4);
192  else av_assert0(0);
193 
194  return 0;
195 }
196 
197 static int filter_slice_luma(AVFilterContext *ctx, void *arg, int jobnr,
198  int nb_jobs)
199 {
200  FadeContext *s = ctx->priv;
201  AVFrame *frame = arg;
202  int slice_start = (frame->height * jobnr ) / nb_jobs;
203  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
204  int i, j;
205 
206  for (i = slice_start; i < slice_end; i++) {
207  uint8_t *p = frame->data[0] + i * frame->linesize[0];
208  for (j = 0; j < frame->width * s->bpp; j++) {
209  /* s->factor is using 16 lower-order bits for decimal
210  * places. 32768 = 1 << 15, it is an integer representation
211  * of 0.5 and is for rounding. */
212  *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
213  p++;
214  }
215  }
216 
217  return 0;
218 }
219 
220 static int filter_slice_chroma(AVFilterContext *ctx, void *arg, int jobnr,
221  int nb_jobs)
222 {
223  FadeContext *s = ctx->priv;
224  AVFrame *frame = arg;
225  int i, j, plane;
226  const int width = FF_CEIL_RSHIFT(frame->width, s->hsub);
227  const int height= FF_CEIL_RSHIFT(frame->height, s->vsub);
228  int slice_start = (height * jobnr ) / nb_jobs;
229  int slice_end = (height * (jobnr+1)) / nb_jobs;
230 
231  for (plane = 1; plane < 3; plane++) {
232  for (i = slice_start; i < slice_end; i++) {
233  uint8_t *p = frame->data[plane] + i * frame->linesize[plane];
234  for (j = 0; j < width; j++) {
235  /* 8421367 = ((128 << 1) + 1) << 15. It is an integer
236  * representation of 128.5. The .5 is for rounding
237  * purposes. */
238  *p = ((*p - 128) * s->factor + 8421367) >> 16;
239  p++;
240  }
241  }
242  }
243 
244  return 0;
245 }
246 
247 static int filter_slice_alpha(AVFilterContext *ctx, void *arg, int jobnr,
248  int nb_jobs)
249 {
250  FadeContext *s = ctx->priv;
251  AVFrame *frame = arg;
252  int plane = s->is_packed_rgb ? 0 : A;
253  int slice_start = (frame->height * jobnr ) / nb_jobs;
254  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
255  int i, j;
256 
257  for (i = slice_start; i < slice_end; i++) {
258  uint8_t *p = frame->data[plane] + i * frame->linesize[plane] + s->is_packed_rgb*s->rgba_map[A];
259  int step = s->is_packed_rgb ? 4 : 1;
260  for (j = 0; j < frame->width; j++) {
261  /* s->factor is using 16 lower-order bits for decimal
262  * places. 32768 = 1 << 15, it is an integer representation
263  * of 0.5 and is for rounding. */
264  *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
265  p += step;
266  }
267  }
268 
269  return 0;
270 }
271 
272 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
273 {
274  AVFilterContext *ctx = inlink->dst;
275  FadeContext *s = ctx->priv;
276  double frame_timestamp = frame->pts == AV_NOPTS_VALUE ? -1 : frame->pts * av_q2d(inlink->time_base);
277 
278  // Calculate Fade assuming this is a Fade In
279  if (s->fade_state == VF_FADE_WAITING) {
280  s->factor=0;
281  if (frame_timestamp >= s->start_time/(double)AV_TIME_BASE
282  && inlink->frame_count >= s->start_frame) {
283  // Time to start fading
284  s->fade_state = VF_FADE_FADING;
285 
286  // Save start time in case we are starting based on frames and fading based on time
287  if (s->start_time == 0 && s->start_frame != 0) {
288  s->start_time = frame_timestamp*(double)AV_TIME_BASE;
289  }
290 
291  // Save start frame in case we are starting based on time and fading based on frames
292  if (s->start_time != 0 && s->start_frame == 0) {
293  s->start_frame = inlink->frame_count;
294  }
295  }
296  }
297  if (s->fade_state == VF_FADE_FADING) {
298  if (s->duration == 0) {
299  // Fading based on frame count
300  s->factor = (inlink->frame_count - s->start_frame) * s->fade_per_frame;
301  if (inlink->frame_count > s->start_frame + s->nb_frames) {
302  s->fade_state = VF_FADE_DONE;
303  }
304 
305  } else {
306  // Fading based on duration
307  s->factor = (frame_timestamp - s->start_time/(double)AV_TIME_BASE)
308  * (float) UINT16_MAX / (s->duration/(double)AV_TIME_BASE);
309  if (frame_timestamp > s->start_time/(double)AV_TIME_BASE
310  + s->duration/(double)AV_TIME_BASE) {
311  s->fade_state = VF_FADE_DONE;
312  }
313  }
314  }
315  if (s->fade_state == VF_FADE_DONE) {
316  s->factor=UINT16_MAX;
317  }
318 
319  s->factor = av_clip_uint16(s->factor);
320 
321  // Invert fade_factor if Fading Out
322  if (s->type == FADE_OUT) {
323  s->factor=UINT16_MAX-s->factor;
324  }
325 
326  if (s->factor < UINT16_MAX) {
327  if (s->alpha) {
328  ctx->internal->execute(ctx, filter_slice_alpha, frame, NULL,
329  FFMIN(frame->height, ctx->graph->nb_threads));
330  } else if (s->is_packed_rgb && !s->black_fade) {
331  ctx->internal->execute(ctx, filter_slice_rgb, frame, NULL,
332  FFMIN(frame->height, ctx->graph->nb_threads));
333  } else {
334  /* luma, or rgb plane in case of black */
335  ctx->internal->execute(ctx, filter_slice_luma, frame, NULL,
336  FFMIN(frame->height, ctx->graph->nb_threads));
337 
338  if (frame->data[1] && frame->data[2]) {
339  /* chroma planes */
340  ctx->internal->execute(ctx, filter_slice_chroma, frame, NULL,
341  FFMIN(frame->height, ctx->graph->nb_threads));
342  }
343  }
344  }
345 
346  return ff_filter_frame(inlink->dst->outputs[0], frame);
347 }
348 
349 
350 #define OFFSET(x) offsetof(FadeContext, x)
351 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
352 
353 static const AVOption fade_options[] = {
354  { "type", "'in' or 'out' for fade-in/fade-out", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
355  { "t", "'in' or 'out' for fade-in/fade-out", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
356  { "in", "fade-in", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_IN }, .unit = "type" },
357  { "out", "fade-out", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_OUT }, .unit = "type" },
358  { "start_frame", "Number of the first frame to which to apply the effect.",
359  OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
360  { "s", "Number of the first frame to which to apply the effect.",
361  OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
362  { "nb_frames", "Number of frames to which the effect should be applied.",
363  OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 0, INT_MAX, FLAGS },
364  { "n", "Number of frames to which the effect should be applied.",
365  OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 0, INT_MAX, FLAGS },
366  { "alpha", "fade alpha if it is available on the input", OFFSET(alpha), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, FLAGS },
367  { "start_time", "Number of seconds of the beginning of the effect.",
368  OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
369  { "st", "Number of seconds of the beginning of the effect.",
370  OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
371  { "duration", "Duration of the effect in seconds.",
372  OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
373  { "d", "Duration of the effect in seconds.",
374  OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
375  { "color", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, CHAR_MIN, CHAR_MAX, FLAGS },
376  { "c", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, CHAR_MIN, CHAR_MAX, FLAGS },
377  { NULL }
378 };
379 
381 
383  {
384  .name = "default",
385  .type = AVMEDIA_TYPE_VIDEO,
386  .config_props = config_props,
387  .filter_frame = filter_frame,
388  .needs_writable = 1,
389  },
390  { NULL }
391 };
392 
394  {
395  .name = "default",
396  .type = AVMEDIA_TYPE_VIDEO,
397  },
398  { NULL }
399 };
400 
402  .name = "fade",
403  .description = NULL_IF_CONFIG_SMALL("Fade in/out input video."),
404  .init = init,
405  .priv_size = sizeof(FadeContext),
406  .priv_class = &fade_class,
408  .inputs = avfilter_vf_fade_inputs,
409  .outputs = avfilter_vf_fade_outputs,
411 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:669
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2029
This structure describes decoded (raw) audio or video data.
Definition: frame.h:163
static const AVFilterPad avfilter_vf_fade_outputs[]
Definition: vf_fade.c:393
AVOption.
Definition: opt.h:255
int bpp
Definition: vf_fade.c:57
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:73
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:246
Main libavfilter public API header.
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:70
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
Definition: pixdesc.c:1981
static int config_props(AVFilterLink *inlink)
Definition: vf_fade.c:133
unsigned int black_level
Definition: vf_fade.c:58
static const AVOption fade_options[]
Definition: vf_fade.c:353
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:80
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:294
struct AVFilterGraph * graph
filtergraph this filter belongs to
Definition: avfilter.h:656
const char * name
Pad name.
Definition: internal.h:67
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1145
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:108
static int64_t start_time
Definition: ffplay.c:319
if()
Definition: avfilter.c:975
uint64_t duration
Definition: vf_fade.c:62
uint8_t
#define av_cold
Definition: attributes.h:74
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
Definition: pixdesc.h:156
AVOptions.
#define FLAGS
Definition: vf_fade.c:351
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:249
#define INTERP(c_name, c_idx)
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:101
static AVFrame * frame
int black_fade
if color_rgba is black
Definition: vf_fade.c:65
static double av_q2d(AVRational a)
Convert rational to double.
Definition: rational.h:80
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of PIX_FMT_YUV440P and setting color_range ...
Definition: pixfmt.h:107
int nb_threads
Maximum number of threads used by filters in this graph.
Definition: avfilter.h:1203
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV422P and setting color_...
Definition: pixfmt.h:81
int alpha
Definition: vf_fade.c:61
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:191
void 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:539
static int64_t duration
Definition: ffplay.c:320
static void fade(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int width, int height, int alpha, int beta)
Definition: vp8.c:436
int ff_fmt_is_in(int fmt, const int *fmts)
Tell is a format is contained in the provided list terminated by -1.
Definition: formats.c:254
#define av_log(a,...)
static av_always_inline void filter_rgb(FadeContext *s, const AVFrame *frame, int slice_start, int slice_end, int do_alpha, int step)
Definition: vf_fade.c:156
A filter pad used for either input or output.
Definition: internal.h:61
static int query_formats(AVFilterContext *ctx)
Definition: vf_fade.c:98
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:267
static double alpha(void *priv, double x, double y)
Definition: vf_geq.c:98
int width
width and height of the video frame
Definition: frame.h:212
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:89
static av_cold int init(AVFilterContext *ctx)
Definition: vf_fade.c:68
uint8_t is_packed_rgb
Definition: vf_fade.c:59
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:180
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:102
void * priv
private data for use by the filter
Definition: avfilter.h:654
uint64_t start_time
Definition: vf_fade.c:62
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:442
const char * arg
Definition: jacosubdec.c:66
simple assert() macros that are a bit more flexible than ISO C assert().
#define A
Definition: vf_fade.c:43
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: vf_fade.c:272
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:99
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:100
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:72
int fade_per_frame
Definition: vf_fade.c:55
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:247
static int filter_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:181
#define FFMIN(a, b)
Definition: common.h:66
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV420P and setting color_...
Definition: pixfmt.h:80
#define FF_CEIL_RSHIFT(a, b)
Definition: common.h:57
static int filter_slice_chroma(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:220
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:71
static const AVFilterPad avfilter_vf_fade_inputs[]
Definition: vf_fade.c:382
int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
Definition: drawutils.c:33
#define FADE_OUT
Definition: vf_fade.c:50
AVFilter ff_vf_fade
Definition: vf_fade.c:401
enum FadeContext::@129 fade_state
misc drawing utilities
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:191
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:266
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 start_frame
Definition: vf_fade.c:56
GLint GLenum type
Definition: opengl_enc.c:105
BYTE int const BYTE int int int height
Definition: avisynth_c.h:714
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:74
Describe the class of an AVClass context structure.
Definition: log.h:66
static int filter_slice_luma(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:197
int vsub
Definition: vf_fade.c:57
Filter definition.
Definition: avfilter.h:470
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:237
const char * name
Filter name.
Definition: avfilter.h:474
int type
Definition: vf_fade.c:54
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:648
#define FADE_IN
Definition: vf_fade.c:49
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:679
static int flags
Definition: cpu.c:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:174
uint8_t color_rgba[4]
fade color
Definition: vf_fade.c:64
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:68
common internal and external API header
static double c[64]
int nb_frames
Definition: vf_fade.c:56
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of PIX_FMT_YUV444P and setting color_...
Definition: pixfmt.h:82
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:75
#define OFFSET(x)
Definition: vf_fade.c:350
avfilter_execute_func * execute
Definition: internal.h:162
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2062
int factor
Definition: vf_fade.c:55
unsigned int black_level_scaled
Definition: vf_fade.c:58
int hsub
Definition: vf_fade.c:57
static int filter_slice_alpha(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:247
An instance of a filter.
Definition: avfilter.h:633
uint8_t rgba_map[4]
Definition: vf_fade.c:60
int height
Definition: frame.h:212
#define G
Definition: vf_fade.c:41
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:106
#define av_always_inline
Definition: attributes.h:37
#define R
Definition: vf_fade.c:40
internal API functions
#define B
Definition: vf_fade.c:42
static const enum AVPixelFormat studio_level_pix_fmts[]
Definition: vf_fade.c:126
AVPixelFormat
Pixel format.
Definition: pixfmt.h:66
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:127
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:241
simple arithmetic expression evaluator
AVFILTER_DEFINE_CLASS(fade)
static int width