FFmpeg
vf_mix.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2017 Paul B Mahol
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 "config_components.h"
22 
23 #include "libavutil/avstring.h"
24 #include "libavutil/imgutils.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/opt.h"
27 #include "libavutil/pixdesc.h"
28 
29 #include "avfilter.h"
30 #include "formats.h"
31 #include "internal.h"
32 #include "framesync.h"
33 #include "video.h"
34 
35 typedef struct MixContext {
36  const AVClass *class;
38  char *weights_str;
39  int nb_inputs;
41  int duration;
42  float *weights;
43  float scale;
44  float wfactor;
45 
46  int tmix;
47  int nb_frames;
48 
49  int depth;
50  int max;
51  int planes;
52  int nb_planes;
53  int linesizes[4];
54  int height[4];
55 
56  uint8_t **data;
57  int *linesize;
58 
61 } MixContext;
62 
64 {
65  unsigned reject_flags = AV_PIX_FMT_FLAG_BITSTREAM |
68  unsigned accept_flags = 0;
69 
70  if (!HAVE_BIGENDIAN)
71  reject_flags |= AV_PIX_FMT_FLAG_BE;
72  else
73  accept_flags |= AV_PIX_FMT_FLAG_BE;
74 
75  return ff_set_common_formats(ctx, ff_formats_pixdesc_filter(accept_flags, reject_flags));
76 }
77 
79 {
80  MixContext *s = ctx->priv;
81  char *p, *arg, *saveptr = NULL;
82  int i, last = 0;
83 
84  s->wfactor = 0.f;
85  p = s->weights_str;
86  for (i = 0; i < s->nb_inputs; i++) {
87  if (!(arg = av_strtok(p, " |", &saveptr)))
88  break;
89 
90  p = NULL;
91  if (av_sscanf(arg, "%f", &s->weights[i]) != 1) {
92  av_log(ctx, AV_LOG_ERROR, "Invalid syntax for weights[%d].\n", i);
93  return AVERROR(EINVAL);
94  }
95  s->wfactor += s->weights[i];
96  last = i;
97  }
98 
99  for (; i < s->nb_inputs; i++) {
100  s->weights[i] = s->weights[last];
101  s->wfactor += s->weights[i];
102  }
103  if (s->scale == 0) {
104  s->wfactor = 1 / s->wfactor;
105  } else {
106  s->wfactor = s->scale;
107  }
108 
109  return 0;
110 }
111 
113 {
114  MixContext *s = ctx->priv;
115  int ret;
116 
117  s->tmix = !strcmp(ctx->filter->name, "tmix");
118 
119  s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
120  if (!s->frames)
121  return AVERROR(ENOMEM);
122 
123  s->weights = av_calloc(s->nb_inputs, sizeof(*s->weights));
124  if (!s->weights)
125  return AVERROR(ENOMEM);
126 
127  if (!s->tmix) {
128  for (int i = 0; i < s->nb_inputs; i++) {
129  AVFilterPad pad = { 0 };
130 
131  pad.type = AVMEDIA_TYPE_VIDEO;
132  pad.name = av_asprintf("input%d", i);
133  if (!pad.name)
134  return AVERROR(ENOMEM);
135 
136  if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
137  return ret;
138  }
139  }
140 
141  return parse_weights(ctx);
142 }
143 
144 typedef struct ThreadData {
145  AVFrame **in, *out;
146 } ThreadData;
147 
148 #define MIX_SLICE(type, fun, clip) \
149  for (int p = 0; p < s->nb_planes; p++) { \
150  const int slice_start = (s->height[p] * jobnr) / nb_jobs; \
151  const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs; \
152  const int width = s->linesizes[p] / sizeof(type); \
153  type *dst = (type *)(out->data[p] + slice_start * out->linesize[p]); \
154  ptrdiff_t dst_linesize = out->linesize[p] / sizeof(type); \
155  \
156  if (!((1 << p) & s->planes)) { \
157  av_image_copy_plane((uint8_t *)dst, out->linesize[p], \
158  in[0]->data[p] + slice_start * in[0]->linesize[p], \
159  in[0]->linesize[p], \
160  s->linesizes[p], slice_end - slice_start); \
161  continue; \
162  } \
163  \
164  for (int i = 0; i < s->nb_inputs; i++) \
165  linesize[i] = in[i]->linesize[p]; \
166  \
167  for (int i = 0; i < s->nb_inputs; i++) \
168  srcf[i] = in[i]->data[p] + slice_start * linesize[i]; \
169  \
170  for (int y = slice_start; y < slice_end; y++) { \
171  for (int x = 0; x < width; x++) { \
172  float val = 0.f; \
173  \
174  for (int i = 0; i < s->nb_inputs; i++) { \
175  float src = *(type *)(srcf[i] + x * sizeof(type)); \
176  \
177  val += src * weights[i]; \
178  } \
179  \
180  dst[x] = clip(fun(val * s->wfactor), 0, s->max); \
181  } \
182  \
183  dst += dst_linesize; \
184  for (int i = 0; i < s->nb_inputs; i++) \
185  srcf[i] += linesize[i]; \
186  } \
187  }
188 
189 #define CLIP8(x, min, max) av_clip_uint8(x)
190 #define CLIP16(x, min, max) av_clip(x, min, max)
191 #define CLIPF(x, min, max) (x)
192 #define NOP(x) (x)
193 
194 static int mix_frames(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
195 {
196  MixContext *s = ctx->priv;
197  ThreadData *td = arg;
198  AVFrame **in = td->in;
199  AVFrame *out = td->out;
200  const float *weights = s->weights;
201  uint8_t **srcf = s->data + jobnr * s->nb_inputs;
202  int *linesize = s->linesize + jobnr * s->nb_inputs;
203 
204  if (s->depth <= 8) {
205  MIX_SLICE(uint8_t, lrintf, CLIP8)
206  } else if (s->depth <= 16) {
207  MIX_SLICE(uint16_t, lrintf, CLIP16)
208  } else {
209  MIX_SLICE(float, NOP, CLIPF)
210  }
211 
212  return 0;
213 }
214 
216 {
217  AVFilterContext *ctx = fs->parent;
218  AVFilterLink *outlink = ctx->outputs[0];
219  MixContext *s = fs->opaque;
220  AVFrame **in = s->frames;
221  AVFrame *out;
222  ThreadData td;
223  int i, ret;
224 
225  for (i = 0; i < s->nb_inputs; i++) {
226  if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
227  return ret;
228  }
229 
230  if (ctx->is_disabled) {
231  out = av_frame_clone(s->frames[0]);
232  if (!out)
233  return AVERROR(ENOMEM);
234  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
235  return ff_filter_frame(outlink, out);
236  }
237 
238  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
239  if (!out)
240  return AVERROR(ENOMEM);
241  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
242 
243  td.in = in;
244  td.out = out;
246  FFMIN(s->height[1], s->nb_threads));
247 
248  return ff_filter_frame(outlink, out);
249 }
250 
251 static int config_output(AVFilterLink *outlink)
252 {
253  AVFilterContext *ctx = outlink->src;
254  MixContext *s = ctx->priv;
255  AVRational frame_rate = ctx->inputs[0]->frame_rate;
256  AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
257  AVFilterLink *inlink = ctx->inputs[0];
258  int height = ctx->inputs[0]->h;
259  int width = ctx->inputs[0]->w;
260  FFFrameSyncIn *in;
261  int i, ret;
262 
263  if (!s->tmix) {
264  for (i = 1; i < s->nb_inputs; i++) {
265  if (ctx->inputs[i]->h != height || ctx->inputs[i]->w != width) {
266  av_log(ctx, AV_LOG_ERROR, "Input %d size (%dx%d) does not match input %d size (%dx%d).\n", i, ctx->inputs[i]->w, ctx->inputs[i]->h, 0, width, height);
267  return AVERROR(EINVAL);
268  }
269  }
270  }
271 
272  s->nb_threads = ff_filter_get_nb_threads(ctx);
273  s->desc = av_pix_fmt_desc_get(outlink->format);
274  if (!s->desc)
275  return AVERROR_BUG;
276  s->nb_planes = av_pix_fmt_count_planes(outlink->format);
277  s->depth = s->desc->comp[0].depth;
278  s->max = (1 << s->depth) - 1;
279 
280  if ((ret = av_image_fill_linesizes(s->linesizes, inlink->format, inlink->w)) < 0)
281  return ret;
282 
283  s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
284  s->height[0] = s->height[3] = inlink->h;
285 
286  s->data = av_calloc(s->nb_threads * s->nb_inputs, sizeof(*s->data));
287  if (!s->data)
288  return AVERROR(ENOMEM);
289 
290  s->linesize = av_calloc(s->nb_threads * s->nb_inputs, sizeof(*s->linesize));
291  if (!s->linesize)
292  return AVERROR(ENOMEM);
293 
294  if (s->tmix)
295  return 0;
296 
297  outlink->w = width;
298  outlink->h = height;
299  outlink->frame_rate = frame_rate;
300  outlink->sample_aspect_ratio = sar;
301 
302  if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
303  return ret;
304 
305  in = s->fs.in;
306  s->fs.opaque = s;
307  s->fs.on_event = process_frame;
308 
309  for (i = 0; i < s->nb_inputs; i++) {
310  AVFilterLink *inlink = ctx->inputs[i];
311 
312  in[i].time_base = inlink->time_base;
313  in[i].sync = 1;
314  in[i].before = EXT_STOP;
315  in[i].after = (s->duration == 1 || (s->duration == 2 && i == 0)) ? EXT_STOP : EXT_INFINITY;
316  }
317 
318  ret = ff_framesync_configure(&s->fs);
319  outlink->time_base = s->fs.time_base;
320 
321  return ret;
322 }
323 
325 {
326  MixContext *s = ctx->priv;
327  int i;
328 
329  ff_framesync_uninit(&s->fs);
330  av_freep(&s->weights);
331  av_freep(&s->data);
332  av_freep(&s->linesize);
333 
334  if (s->tmix) {
335  for (i = 0; i < s->nb_frames && s->frames; i++)
336  av_frame_free(&s->frames[i]);
337  }
338  av_freep(&s->frames);
339 }
340 
341 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
342  char *res, int res_len, int flags)
343 {
344  int ret;
345 
346  ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
347  if (ret < 0)
348  return ret;
349 
350  return parse_weights(ctx);
351 }
352 
354 {
355  MixContext *s = ctx->priv;
356  return ff_framesync_activate(&s->fs);
357 }
358 
359 #define OFFSET(x) offsetof(MixContext, x)
360 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
361 #define TFLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
362 
363 static const AVOption mix_options[] = {
364  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT16_MAX, .flags = FLAGS },
365  { "weights", "set weight for each input", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1"}, 0, 0, .flags = TFLAGS },
366  { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = TFLAGS },
367  { "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, .flags = TFLAGS },
368  { "duration", "how to determine end of stream", OFFSET(duration), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, .flags = FLAGS, "duration" },
369  { "longest", "Duration of longest input", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "duration" },
370  { "shortest", "Duration of shortest input", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "duration" },
371  { "first", "Duration of first input", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "duration" },
372  { NULL },
373 };
374 
375 static const AVFilterPad outputs[] = {
376  {
377  .name = "default",
378  .type = AVMEDIA_TYPE_VIDEO,
379  .config_props = config_output,
380  },
381 };
382 
383 #if CONFIG_MIX_FILTER
385 
386 const AVFilter ff_vf_mix = {
387  .name = "mix",
388  .description = NULL_IF_CONFIG_SMALL("Mix video inputs."),
389  .priv_size = sizeof(MixContext),
390  .priv_class = &mix_class,
393  .init = init,
394  .uninit = uninit,
395  .activate = activate,
398  .process_command = process_command,
399 };
400 
401 #endif /* CONFIG_MIX_FILTER */
402 
403 #if CONFIG_TMIX_FILTER
404 static int tmix_filter_frame(AVFilterLink *inlink, AVFrame *in)
405 {
406  AVFilterContext *ctx = inlink->dst;
407  AVFilterLink *outlink = ctx->outputs[0];
408  MixContext *s = ctx->priv;
409  ThreadData td;
410  AVFrame *out;
411 
412  if (s->nb_inputs == 1)
413  return ff_filter_frame(outlink, in);
414 
415  if (s->nb_frames < s->nb_inputs) {
416  s->frames[s->nb_frames] = in;
417  s->nb_frames++;
418  while (s->nb_frames < s->nb_inputs) {
419  s->frames[s->nb_frames] = av_frame_clone(s->frames[s->nb_frames - 1]);
420  if (!s->frames[s->nb_frames])
421  return AVERROR(ENOMEM);
422  s->nb_frames++;
423  }
424  } else {
425  av_frame_free(&s->frames[0]);
426  memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1));
427  s->frames[s->nb_inputs - 1] = in;
428  }
429 
430  if (ctx->is_disabled) {
431  out = av_frame_clone(s->frames[0]);
432  if (!out)
433  return AVERROR(ENOMEM);
434  return ff_filter_frame(outlink, out);
435  }
436 
437  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
438  if (!out)
439  return AVERROR(ENOMEM);
440  out->pts = s->frames[s->nb_frames - 1]->pts;
441 
442  td.out = out;
443  td.in = s->frames;
445  FFMIN(s->height[1], s->nb_threads));
446 
447  return ff_filter_frame(outlink, out);
448 }
449 
450 static const AVOption tmix_options[] = {
451  { "frames", "set number of successive frames to mix", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=3}, 1, 1024, .flags = FLAGS },
452  { "weights", "set weight for each frame", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1 1"}, 0, 0, .flags = TFLAGS },
453  { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = TFLAGS },
454  { "planes", "set what planes to filter", OFFSET(planes), AV_OPT_TYPE_FLAGS, {.i64=15}, 0, 15, .flags = TFLAGS },
455  { NULL },
456 };
457 
458 static const AVFilterPad inputs[] = {
459  {
460  .name = "default",
461  .type = AVMEDIA_TYPE_VIDEO,
462  .filter_frame = tmix_filter_frame,
463  },
464 };
465 
467 
468 const AVFilter ff_vf_tmix = {
469  .name = "tmix",
470  .description = NULL_IF_CONFIG_SMALL("Mix successive video frames."),
471  .priv_size = sizeof(MixContext),
472  .priv_class = &tmix_class,
476  .init = init,
477  .uninit = uninit,
479  .process_command = process_command,
480 };
481 
482 #endif /* CONFIG_TMIX_FILTER */
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:101
FFFrameSyncIn::time_base
AVRational time_base
Time base for the incoming frames.
Definition: framesync.h:96
ff_framesync_configure
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:119
td
#define td
Definition: regdef.h:70
parse_weights
static int parse_weights(AVFilterContext *ctx)
Definition: vf_mix.c:78
mix
static int mix(int c0, int c1)
Definition: 4xm.c:717
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
ff_framesync_uninit
void ff_framesync_uninit(FFFrameSync *fs)
Free all memory currently allocated.
Definition: framesync.c:285
out
FILE * out
Definition: movenc.c:54
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:999
MixContext::nb_threads
int nb_threads
Definition: vf_mix.c:40
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2662
ff_vf_tmix
const AVFilter ff_vf_tmix
ff_framesync_get_frame
int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe, unsigned get)
Get the current frame in an input.
Definition: framesync.c:248
inlink
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
Definition: filter_design.txt:212
av_asprintf
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:116
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:111
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
MixContext::depth
int depth
Definition: vf_mix.c:49
pixdesc.h
ff_vf_mix
const AVFilter ff_vf_mix
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_mix.c:324
MixContext::scale
float scale
Definition: vf_mix.c:43
planes
static const struct @327 planes[]
AVOption
AVOption.
Definition: opt.h:251
TFLAGS
#define TFLAGS
Definition: vf_mix.c:361
MixContext
Definition: af_amix.c:158
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:167
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:175
FFFrameSync
Frame sync structure.
Definition: framesync.h:146
EXT_INFINITY
@ EXT_INFINITY
Extend the frame to infinity.
Definition: framesync.h:75
ThreadData::out
AVFrame * out
Definition: af_adeclick.c:473
video.h
ThreadData::in
AVFrame * in
Definition: af_adecorrelate.c:154
mix_frames
static int mix_frames(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_mix.c:194
MixContext::nb_frames
int nb_frames
Definition: vf_mix.c:47
formats.h
FLAGS
#define FLAGS
Definition: vf_mix.c:360
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2702
EXT_STOP
@ EXT_STOP
Completely stop all streams with this one.
Definition: framesync.h:65
MixContext::duration
int duration
Definition: vf_mix.c:41
AV_PIX_FMT_FLAG_HWACCEL
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:128
FFFrameSyncIn
Input stream structure.
Definition: framesync.h:81
MixContext::tmix
int tmix
Definition: vf_mix.c:46
activate
static int activate(AVFilterContext *ctx)
Definition: vf_mix.c:353
scale
static av_always_inline float scale(float x, float s)
Definition: vf_v360.c:1388
FFFrameSyncIn::sync
unsigned sync
Synchronization level: frames on input at the highest sync level will generate output frame events.
Definition: framesync.h:139
AVFILTER_FLAG_DYNAMIC_INPUTS
#define AVFILTER_FLAG_DYNAMIC_INPUTS
The number of the filter inputs is not determined just by AVFilter.inputs.
Definition: avfilter.h:116
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:49
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
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:748
duration
int64_t duration
Definition: movenc.c:64
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_mix.c:251
width
#define width
av_image_fill_linesizes
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
Definition: imgutils.c:89
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:256
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:50
av_strtok
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok().
Definition: avstring.c:189
NOP
#define NOP(x)
Definition: vf_mix.c:192
ctx
AVFormatContext * ctx
Definition: movenc.c:48
MixContext::fs
FFFrameSync fs
Definition: vf_mix.c:60
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:464
av_rescale_q
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:190
arg
const char * arg
Definition: jacosubdec.c:67
MIX_SLICE
#define MIX_SLICE(type, fun, clip)
Definition: vf_mix.c:148
av_sscanf
int av_sscanf(const char *string, const char *format,...)
See libc sscanf manual for more information.
Definition: avsscanf.c:962
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
fs
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:258
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
ff_append_inpad_free_name
int ff_append_inpad_free_name(AVFilterContext *f, AVFilterPad *p)
Definition: avfilter.c:123
MixContext::planes
int planes
Definition: vf_mix.c:51
process_frame
static int process_frame(FFFrameSync *fs)
Definition: vf_mix.c:215
inputs
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Definition: filter_design.txt:243
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:116
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_mix.c:63
AV_PIX_FMT_FLAG_BITSTREAM
#define AV_PIX_FMT_FLAG_BITSTREAM
All values of a component are bit-wise packed end to end.
Definition: pixdesc.h:124
MixContext::weights_str
char * weights_str
string for custom weights for every input
Definition: af_amix.c:166
MixContext::linesizes
int linesizes[4]
Definition: vf_mix.c:53
ff_filter_process_command
int ff_filter_process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Generic processing of user supplied commands that are set in the same way as the filter options.
Definition: avfilter.c:863
MixContext::height
int height[4]
Definition: vf_mix.c:54
height
#define height
CLIP16
#define CLIP16(x, min, max)
Definition: vf_mix.c:190
internal.h
AVFILTER_DEFINE_CLASS
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:325
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:228
CLIP8
#define CLIP8(x, min, max)
Definition: vf_mix.c:189
ff_formats_pixdesc_filter
AVFilterFormats * ff_formats_pixdesc_filter(unsigned want, unsigned rej)
Construct a formats list containing all pixel formats with certain properties.
Definition: formats.c:497
lrintf
#define lrintf(x)
Definition: libm_mips.h:72
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
CLIPF
#define CLIPF(x, min, max)
Definition: vf_mix.c:191
weights
static const int weights[]
Definition: hevc_pel.c:32
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:783
ThreadData
Used for passing data between threads.
Definition: dsddec.c:68
MixContext::max
int max
Definition: vf_mix.c:50
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AV_PIX_FMT_FLAG_BE
#define AV_PIX_FMT_FLAG_BE
Pixel format is big-endian.
Definition: pixdesc.h:116
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:55
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:272
MixContext::wfactor
float wfactor
Definition: vf_mix.c:44
AVFilter
Filter definition.
Definition: avfilter.h:171
ret
ret
Definition: filter_design.txt:187
AVFilterPad::type
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:60
MixContext::weights
float * weights
custom weights for every input
Definition: af_amix.c:175
ff_framesync_init
int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
Initialize a frame sync structure.
Definition: framesync.c:79
OFFSET
#define OFFSET(x)
Definition: vf_mix.c:359
FFFrameSyncIn::before
enum FFFrameSyncExtMode before
Extrapolation mode for timestamps before the first frame.
Definition: framesync.h:86
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_mix.c:112
framesync.h
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
avfilter.h
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_mix.c:341
AVFilterContext
An instance of a filter.
Definition: avfilter.h:408
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:127
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
MixContext::data
uint8_t ** data
Definition: vf_mix.c:56
mix_options
static const AVOption mix_options[]
Definition: vf_mix.c:363
MixContext::nb_planes
int nb_planes
Definition: vf_mix.c:52
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
MixContext::linesize
int * linesize
Definition: vf_mix.c:57
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:191
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
AV_OPT_TYPE_FLAGS
@ AV_OPT_TYPE_FLAGS
Definition: opt.h:224
AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
Definition: avfilter.h:160
imgutils.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVERROR_BUG
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:52
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
FFFrameSyncIn::after
enum FFFrameSyncExtMode after
Extrapolation mode for timestamps after the last frame.
Definition: framesync.h:91
ff_framesync_activate
int ff_framesync_activate(FFFrameSync *fs)
Examine the frames in the filter's input and try to produce output.
Definition: framesync.c:336
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
ff_filter_execute
static av_always_inline int ff_filter_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
Definition: internal.h:142
AV_PIX_FMT_FLAG_PAL
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:120
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
outputs
static const AVFilterPad outputs[]
Definition: vf_mix.c:375
MixContext::desc
const AVPixFmtDescriptor * desc
Definition: vf_mix.c:37
MixContext::frames
AVFrame ** frames
Definition: vf_mix.c:59
MixContext::nb_inputs
int nb_inputs
number of inputs
Definition: af_amix.c:162