FFmpeg: libavfilter/vf_fade.c Source File

FFmpeg
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;
55   int factor, fade_per_frame;
56   int start_frame, nb_frames;
57   int hsub, vsub, bpp;
58   unsigned int black_level, black_level_scaled;
59   uint8_t is_packed_rgb;
60   uint8_t rgba_map[4];
61   int alpha;
62   uint64_t start_time, duration;
63   enum {VF_FADE_WAITING=0, VF_FADE_FADING, VF_FADE_DONE} fade_state;
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) {
82  av_log(ctx, AV_LOG_VERBOSE,
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) {
88  av_log(ctx, AV_LOG_VERBOSE,
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 
98  static int query_formats(AVFilterContext *ctx)
99 {
100  const FadeContext *s = ctx->priv;
101  static const enum AVPixelFormat pix_fmts[] = {
102  AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
103  AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
104  AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
105  AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
106  AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
107  AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
108  AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
109  AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
110  AV_PIX_FMT_NONE
111  };
112  static const enum AVPixelFormat pix_fmts_rgb[] = {
113  AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24,
114  AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
115  AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
116  AV_PIX_FMT_NONE
117  };
118  static const enum AVPixelFormat pix_fmts_alpha[] = {
119  AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
120  AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
121  AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
122  AV_PIX_FMT_NONE
123  };
124  static const enum AVPixelFormat pix_fmts_rgba[] = {
125  AV_PIX_FMT_ARGB, AV_PIX_FMT_ABGR,
126  AV_PIX_FMT_RGBA, AV_PIX_FMT_BGRA,
127  AV_PIX_FMT_NONE
128  };
129  AVFilterFormats *fmts_list;
130 
131  if (s->alpha) {
132  if (s->black_fade)
133  fmts_list = ff_make_format_list(pix_fmts_alpha);
134  else
135  fmts_list = ff_make_format_list(pix_fmts_rgba);
136  } else {
137  if (s->black_fade)
138  fmts_list = ff_make_format_list(pix_fmts);
139  else
140  fmts_list = ff_make_format_list(pix_fmts_rgb);
141  }
142  if (!fmts_list)
143  return AVERROR(ENOMEM);
144  return ff_set_common_formats(ctx, fmts_list);
145 }
146 
147  const static enum AVPixelFormat studio_level_pix_fmts[] = {
148  AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
149  AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
150  AV_PIX_FMT_YUV440P,
151  AV_PIX_FMT_NONE
152 };
153 
154  static int config_props(AVFilterLink *inlink)
155 {
156  FadeContext *s = inlink->dst->priv;
157  const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(inlink->format);
158 
159  s->hsub = pixdesc->log2_chroma_w;
160  s->vsub = pixdesc->log2_chroma_h;
161 
162  s->bpp = pixdesc->flags & AV_PIX_FMT_FLAG_PLANAR ?
163  1 :
164  av_get_bits_per_pixel(pixdesc) >> 3;
165  s->alpha &= !!(pixdesc->flags & AV_PIX_FMT_FLAG_ALPHA);
166  s->is_packed_rgb = ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0;
167 
168  /* use CCIR601/709 black level for studio-level pixel non-alpha components */
169  s->black_level =
170  ff_fmt_is_in(inlink->format, studio_level_pix_fmts) && !s->alpha ? 16 : 0;
171  /* 32768 = 1 << 15, it is an integer representation
172  * of 0.5 and is for rounding. */
173  s->black_level_scaled = (s->black_level << 16) + 32768;
174  return 0;
175 }
176 
177  static av_always_inline void filter_rgb(FadeContext *s, const AVFrame *frame,
178  int slice_start, int slice_end,
179  int do_alpha, int step)
180 {
181  int i, j;
182  const uint8_t r_idx = s->rgba_map[R];
183  const uint8_t g_idx = s->rgba_map[G];
184  const uint8_t b_idx = s->rgba_map[B];
185  const uint8_t a_idx = s->rgba_map[A];
186  const uint8_t *c = s->color_rgba;
187 
188  for (i = slice_start; i < slice_end; i++) {
189  uint8_t *p = frame->data[0] + i * frame->linesize[0];
190  for (j = 0; j < frame->width; j++) {
191 #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)
192  p[r_idx] = INTERP(r_idx, 0);
193  p[g_idx] = INTERP(g_idx, 1);
194  p[b_idx] = INTERP(b_idx, 2);
195  if (do_alpha)
196  p[a_idx] = INTERP(a_idx, 3);
197  p += step;
198  }
199  }
200 }
201 
202  static int filter_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr,
203  int nb_jobs)
204 {
205  FadeContext *s = ctx->priv;
206  AVFrame *frame = arg;
207  int slice_start = (frame->height * jobnr ) / nb_jobs;
208  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
209 
210  if (s->alpha) filter_rgb(s, frame, slice_start, slice_end, 1, 4);
211  else if (s->bpp == 3) filter_rgb(s, frame, slice_start, slice_end, 0, 3);
212  else if (s->bpp == 4) filter_rgb(s, frame, slice_start, slice_end, 0, 4);
213  else av_assert0(0);
214 
215  return 0;
216 }
217 
218  static int filter_slice_luma(AVFilterContext *ctx, void *arg, int jobnr,
219  int nb_jobs)
220 {
221  FadeContext *s = ctx->priv;
222  AVFrame *frame = arg;
223  int slice_start = (frame->height * jobnr ) / nb_jobs;
224  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
225  int i, j;
226 
227  for (i = slice_start; i < slice_end; i++) {
228  uint8_t *p = frame->data[0] + i * frame->linesize[0];
229  for (j = 0; j < frame->width * s->bpp; j++) {
230  /* s->factor is using 16 lower-order bits for decimal
231  * places. 32768 = 1 << 15, it is an integer representation
232  * of 0.5 and is for rounding. */
233  *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
234  p++;
235  }
236  }
237 
238  return 0;
239 }
240 
241  static int filter_slice_chroma(AVFilterContext *ctx, void *arg, int jobnr,
242  int nb_jobs)
243 {
244  FadeContext *s = ctx->priv;
245  AVFrame *frame = arg;
246  int i, j, plane;
247  const int width = AV_CEIL_RSHIFT(frame->width, s->hsub);
248  const int height= AV_CEIL_RSHIFT(frame->height, s->vsub);
249  int slice_start = (height * jobnr ) / nb_jobs;
250  int slice_end = FFMIN(((height * (jobnr+1)) / nb_jobs), frame->height);
251 
252  for (plane = 1; plane < 3; plane++) {
253  for (i = slice_start; i < slice_end; i++) {
254  uint8_t *p = frame->data[plane] + i * frame->linesize[plane];
255  for (j = 0; j < width; j++) {
256  /* 8421367 = ((128 << 1) + 1) << 15. It is an integer
257  * representation of 128.5. The .5 is for rounding
258  * purposes. */
259  *p = ((*p - 128) * s->factor + 8421367) >> 16;
260  p++;
261  }
262  }
263  }
264 
265  return 0;
266 }
267 
268  static int filter_slice_alpha(AVFilterContext *ctx, void *arg, int jobnr,
269  int nb_jobs)
270 {
271  FadeContext *s = ctx->priv;
272  AVFrame *frame = arg;
273  int plane = s->is_packed_rgb ? 0 : A;
274  int slice_start = (frame->height * jobnr ) / nb_jobs;
275  int slice_end = (frame->height * (jobnr+1)) / nb_jobs;
276  int i, j;
277 
278  for (i = slice_start; i < slice_end; i++) {
279  uint8_t *p = frame->data[plane] + i * frame->linesize[plane] + s->is_packed_rgb*s->rgba_map[A];
280  int step = s->is_packed_rgb ? 4 : 1;
281  for (j = 0; j < frame->width; j++) {
282  /* s->factor is using 16 lower-order bits for decimal
283  * places. 32768 = 1 << 15, it is an integer representation
284  * of 0.5 and is for rounding. */
285  *p = ((*p - s->black_level) * s->factor + s->black_level_scaled) >> 16;
286  p += step;
287  }
288  }
289 
290  return 0;
291 }
292 
293  static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
294 {
295  AVFilterContext *ctx = inlink->dst;
296  FadeContext *s = ctx->priv;
297  double frame_timestamp = frame->pts == AV_NOPTS_VALUE ? -1 : frame->pts * av_q2d(inlink->time_base);
298 
299  // Calculate Fade assuming this is a Fade In
300  if (s->fade_state == VF_FADE_WAITING) {
301  s->factor=0;
302  if (frame_timestamp >= s->start_time/(double)AV_TIME_BASE
303  && inlink->frame_count_out >= s->start_frame) {
304  // Time to start fading
305  s->fade_state = VF_FADE_FADING;
306 
307  // Save start time in case we are starting based on frames and fading based on time
308  if (s->start_time == 0 && s->start_frame != 0) {
309  s->start_time = frame_timestamp*(double)AV_TIME_BASE;
310  }
311 
312  // Save start frame in case we are starting based on time and fading based on frames
313  if (s->start_time != 0 && s->start_frame == 0) {
314  s->start_frame = inlink->frame_count_out;
315  }
316  }
317  }
318  if (s->fade_state == VF_FADE_FADING) {
319  if (s->duration == 0) {
320  // Fading based on frame count
321  s->factor = (inlink->frame_count_out - s->start_frame) * s->fade_per_frame;
322  if (inlink->frame_count_out > s->start_frame + s->nb_frames) {
323  s->fade_state = VF_FADE_DONE;
324  }
325 
326  } else {
327  // Fading based on duration
328  s->factor = (frame_timestamp - s->start_time/(double)AV_TIME_BASE)
329  * (float) UINT16_MAX / (s->duration/(double)AV_TIME_BASE);
330  if (frame_timestamp > s->start_time/(double)AV_TIME_BASE
331  + s->duration/(double)AV_TIME_BASE) {
332  s->fade_state = VF_FADE_DONE;
333  }
334  }
335  }
336  if (s->fade_state == VF_FADE_DONE) {
337  s->factor=UINT16_MAX;
338  }
339 
340  s->factor = av_clip_uint16(s->factor);
341 
342  // Invert fade_factor if Fading Out
343  if (s->type == FADE_OUT) {
344  s->factor=UINT16_MAX-s->factor;
345  }
346 
347  if (s->factor < UINT16_MAX) {
348  if (s->alpha) {
349  ctx->internal->execute(ctx, filter_slice_alpha, frame, NULL,
350  FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
351  } else if (s->is_packed_rgb && !s->black_fade) {
352  ctx->internal->execute(ctx, filter_slice_rgb, frame, NULL,
353  FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
354  } else {
355  /* luma, or rgb plane in case of black */
356  ctx->internal->execute(ctx, filter_slice_luma, frame, NULL,
357  FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
358 
359  if (frame->data[1] && frame->data[2]) {
360  /* chroma planes */
361  ctx->internal->execute(ctx, filter_slice_chroma, frame, NULL,
362  FFMIN(frame->height, ff_filter_get_nb_threads(ctx)));
363  }
364  }
365  }
366 
367  return ff_filter_frame(inlink->dst->outputs[0], frame);
368 }
369 
370 
371  #define OFFSET(x) offsetof(FadeContext, x)
372  #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
373 
374  static const AVOption fade_options[] = {
375  { "type", "'in' or 'out' for fade-in/fade-out", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
376  { "t", "'in' or 'out' for fade-in/fade-out", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = FADE_IN }, FADE_IN, FADE_OUT, FLAGS, "type" },
377  { "in", "fade-in", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_IN }, .unit = "type" },
378  { "out", "fade-out", 0, AV_OPT_TYPE_CONST, { .i64 = FADE_OUT }, .unit = "type" },
379  { "start_frame", "Number of the first frame to which to apply the effect.",
380  OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
381  { "s", "Number of the first frame to which to apply the effect.",
382  OFFSET(start_frame), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, FLAGS },
383  { "nb_frames", "Number of frames to which the effect should be applied.",
384  OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 0, INT_MAX, FLAGS },
385  { "n", "Number of frames to which the effect should be applied.",
386  OFFSET(nb_frames), AV_OPT_TYPE_INT, { .i64 = 25 }, 0, INT_MAX, FLAGS },
387  { "alpha", "fade alpha if it is available on the input", OFFSET(alpha), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, FLAGS },
388  { "start_time", "Number of seconds of the beginning of the effect.",
389  OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
390  { "st", "Number of seconds of the beginning of the effect.",
391  OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
392  { "duration", "Duration of the effect in seconds.",
393  OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
394  { "d", "Duration of the effect in seconds.",
395  OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT32_MAX, FLAGS },
396  { "color", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, CHAR_MIN, CHAR_MAX, FLAGS },
397  { "c", "set color", OFFSET(color_rgba), AV_OPT_TYPE_COLOR, {.str = "black"}, CHAR_MIN, CHAR_MAX, FLAGS },
398  { NULL }
399 };
400 
401 AVFILTER_DEFINE_CLASS(fade);
402 
403  static const AVFilterPad avfilter_vf_fade_inputs[] = {
404  {
405  .name = "default",
406  .type = AVMEDIA_TYPE_VIDEO,
407  .config_props = config_props,
408  .filter_frame = filter_frame,
409  .needs_writable = 1,
410  },
411  { NULL }
412 };
413 
414  static const AVFilterPad avfilter_vf_fade_outputs[] = {
415  {
416  .name = "default",
417  .type = AVMEDIA_TYPE_VIDEO,
418  },
419  { NULL }
420 };
421 
422  AVFilter ff_vf_fade = {
423  .name = "fade",
424  .description = NULL_IF_CONFIG_SMALL("Fade in/out input video."),
425  .init = init,
426  .priv_size = sizeof(FadeContext),
427  .priv_class = &fade_class,
428  .query_formats = query_formats,
429  .inputs = avfilter_vf_fade_inputs,
430  .outputs = avfilter_vf_fade_outputs,
431  .flags = AVFILTER_FLAG_SLICE_THREADS,
432 };
plane
int plane
Definition: avisynth_c.h:422
NULL
#define NULL
Definition: coverity.c:32
s
const char * s
Definition: avisynth_c.h:768
alpha
static float alpha(float a)
Definition: af_superequalizer.c:109
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2363
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:218
avfilter_vf_fade_outputs
static const AVFilterPad avfilter_vf_fade_outputs[]
Definition: vf_fade.c:414
AVOption
AVOption.
Definition: opt.h:246
FadeContext::bpp
int bpp
Definition: vf_fade.c:57
AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:67
avfilter.h
Main libavfilter public API header.
AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:64
AV_OPT_TYPE_INT
Definition: opt.h:223
av_get_bits_per_pixel
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:2315
config_props
static int config_props(AVFilterLink *inlink)
Definition: vf_fade.c:154
FadeContext::black_level
unsigned int black_level
Definition: vf_fade.c:58
fade_options
static const AVOption fade_options[]
Definition: vf_fade.c:374
AVPixFmtDescriptor::log2_chroma_w
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
AV_OPT_TYPE_COLOR
Definition: opt.h:238
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AV_OPT_TYPE_CONST
Definition: opt.h:232
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:97
start_time
static int64_t start_time
Definition: ffplay.c:327
FadeContext::duration
uint64_t duration
Definition: vf_fade.c:62
uint8_t
uint8_t
Definition: audio_convert.c:194
av_cold
#define av_cold
Definition: attributes.h:82
AV_PIX_FMT_FLAG_ALPHA
#define AV_PIX_FMT_FLAG_ALPHA
The pixel format has an alpha channel.
Definition: pixdesc.h:181
opt.h
AVOptions.
FLAGS
#define FLAGS
Definition: vf_fade.c:372
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:311
INTERP
#define INTERP(c_name, c_idx)
duration
int64_t duration
Definition: movenc.c:63
AV_PIX_FMT_ABGR
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:90
frame
static AVFrame * frame
Definition: demuxing_decoding.c:53
FadeContext::black_fade
int black_fade
if color_rgba is black
Definition: vf_fade.c:65
height
#define height
av_q2d
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
AV_PIX_FMT_YUVJ440P
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
Definition: pixfmt.h:96
flags
static int flags
Definition: log.c:55
AV_PIX_FMT_YUVJ422P
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:75
FadeContext::alpha
int alpha
Definition: vf_fade.c:61
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
ff_fmt_is_in
int ff_fmt_is_in(int fmt, const int *fmts)
Tell if an integer is contained in the provided -1-terminated list of integers.
Definition: formats.c:254
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
filter_rgb
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:177
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_fade.c:98
AV_PIX_FMT_YUVA422P
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:172
AVFrame::width
int width
Definition: frame.h:276
ff_set_common_formats
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:568
AVPixFmtDescriptor::log2_chroma_h
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
AVERROR
#define AVERROR(e)
Definition: error.h:43
fade
static void fade(uint8_t *dst, ptrdiff_t dst_linesize, const uint8_t *src, ptrdiff_t src_linesize, int width, int height, int alpha, int beta)
Definition: vp8.c:488
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_fade.c:68
FadeContext::is_packed_rgb
uint8_t is_packed_rgb
Definition: vf_fade.c:59
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
AV_PIX_FMT_BGRA
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:91
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:353
FadeContext::start_time
uint64_t start_time
Definition: vf_fade.c:62
AVFILTER_FLAG_SLICE_THREADS
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:116
arg
const char * arg
Definition: jacosubdec.c:66
width
uint16_t width
Definition: gdv.c:47
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
FadeContext::fade_state
enum FadeContext::@190 fade_state
A
#define A
Definition: vf_fade.c:43
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
Definition: vf_fade.c:293
AV_PIX_FMT_ARGB
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:88
AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:89
AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:66
AVPixFmtDescriptor::flags
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
FadeContext::fade_per_frame
int fade_per_frame
Definition: vf_fade.c:55
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:802
AV_TIME_BASE
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
filter_slice_rgb
static int filter_slice_rgb(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:202
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
AV_PIX_FMT_YUVJ420P
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:74
ctx
AVFormatContext * ctx
Definition: movenc.c:48
AV_OPT_TYPE_BOOL
Definition: opt.h:240
filter_slice_chroma
static int filter_slice_chroma(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:241
AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:65
avfilter_vf_fade_inputs
static const AVFilterPad avfilter_vf_fade_inputs[]
Definition: vf_fade.c:403
inputs
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
ff_fill_rgba_map
int ff_fill_rgba_map(uint8_t *rgba_map, enum AVPixelFormat pix_fmt)
Definition: drawutils.c:35
FADE_OUT
#define FADE_OUT
Definition: vf_fade.c:50
ff_vf_fade
AVFilter ff_vf_fade
Definition: vf_fade.c:422
drawutils.h
misc drawing utilities
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:249
AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:173
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
FadeContext::start_frame
int start_frame
Definition: vf_fade.c:56
type
GLint GLenum type
Definition: opengl_enc.c:105
AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:68
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
filter_slice_luma
static int filter_slice_luma(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:218
FadeContext::vsub
int vsub
Definition: vf_fade.c:57
AVFilter
Filter definition.
Definition: avfilter.h:144
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:148
FadeContext::type
int type
Definition: vf_fade.c:54
AVFilterContext::outputs
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:266
FADE_IN
#define FADE_IN
Definition: vf_fade.c:49
AVFilterContext::internal
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:378
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:232
AV_OPT_TYPE_DURATION
Definition: opt.h:237
FadeContext::color_rgba
uint8_t color_rgba[4]
fade color
Definition: vf_fade.c:64
AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:62
common.h
common internal and external API header
if
if(ret< 0)
Definition: vf_mcdeint.c:279
c
static double c[64]
Definition: vsrc_mptestsrc.c:87
FadeContext::nb_frames
int nb_frames
Definition: vf_fade.c:56
AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:76
AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:69
OFFSET
#define OFFSET(x)
Definition: vf_fade.c:371
AVFilterInternal::execute
avfilter_execute_func * execute
Definition: internal.h:155
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2029
FadeContext::factor
int factor
Definition: vf_fade.c:55
FadeContext::black_level_scaled
unsigned int black_level_scaled
Definition: vf_fade.c:58
FadeContext::hsub
int hsub
Definition: vf_fade.c:57
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
filter_slice_alpha
static int filter_slice_alpha(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_fade.c:268
AVFilterContext
An instance of a filter.
Definition: avfilter.h:338
FadeContext::rgba_map
uint8_t rgba_map[4]
Definition: vf_fade.c:60
AVFrame::height
int height
Definition: frame.h:276
G
#define G
Definition: vf_fade.c:41
AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:95
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
av_always_inline
#define av_always_inline
Definition: attributes.h:39
R
#define R
Definition: vf_fade.c:40
internal.h
internal API functions
B
#define B
Definition: vf_fade.c:42
studio_level_pix_fmts
static const enum AVPixelFormat studio_level_pix_fmts[]
Definition: vf_fade.c:147
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
AV_PIX_FMT_FLAG_PLANAR
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:144
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
eval.h
simple arithmetic expression evaluator
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(fade)
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