FFmpeg
vf_mix.c
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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 "libavutil/avstring.h"
22 #include "libavutil/imgutils.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/pixdesc.h"
26 
27 #include "avfilter.h"
28 #include "formats.h"
29 #include "internal.h"
30 #include "framesync.h"
31 #include "video.h"
32 
33 typedef struct MixContext {
34  const AVClass *class;
36  char *weights_str;
37  int nb_inputs;
38  int duration;
39  float *weights;
40  float scale;
41  float wfactor;
42 
43  int tmix;
44  int nb_frames;
45 
46  int depth;
47  int max;
48  int nb_planes;
49  int linesize[4];
50  int height[4];
51 
54 } MixContext;
55 
57 {
59  int ret;
60 
65  if (ret < 0)
66  return ret;
68 }
69 
71 {
72  MixContext *s = ctx->priv;
73  char *p, *arg, *saveptr = NULL;
74  int i, last = 0;
75 
76  s->wfactor = 0.f;
77  p = s->weights_str;
78  for (i = 0; i < s->nb_inputs; i++) {
79  if (!(arg = av_strtok(p, " |", &saveptr)))
80  break;
81 
82  p = NULL;
83  if (av_sscanf(arg, "%f", &s->weights[i]) != 1) {
84  av_log(ctx, AV_LOG_ERROR, "Invalid syntax for weights[%d].\n", i);
85  return AVERROR(EINVAL);
86  }
87  s->wfactor += s->weights[i];
88  last = i;
89  }
90 
91  for (; i < s->nb_inputs; i++) {
92  s->weights[i] = s->weights[last];
93  s->wfactor += s->weights[i];
94  }
95  if (s->scale == 0) {
96  s->wfactor = 1 / s->wfactor;
97  } else {
98  s->wfactor = s->scale;
99  }
100 
101  return 0;
102 }
103 
105 {
106  MixContext *s = ctx->priv;
107  int ret;
108 
109  s->tmix = !strcmp(ctx->filter->name, "tmix");
110 
111  s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
112  if (!s->frames)
113  return AVERROR(ENOMEM);
114 
115  s->weights = av_calloc(s->nb_inputs, sizeof(*s->weights));
116  if (!s->weights)
117  return AVERROR(ENOMEM);
118 
119  if (!s->tmix) {
120  for (int i = 0; i < s->nb_inputs; i++) {
121  AVFilterPad pad = { 0 };
122 
123  pad.type = AVMEDIA_TYPE_VIDEO;
124  pad.name = av_asprintf("input%d", i);
125  if (!pad.name)
126  return AVERROR(ENOMEM);
127 
128  if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
129  return ret;
130  }
131  }
132 
133  return parse_weights(ctx);
134 }
135 
136 typedef struct ThreadData {
137  AVFrame **in, *out;
138 } ThreadData;
139 
140 static int mix_frames(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
141 {
142  MixContext *s = ctx->priv;
143  ThreadData *td = arg;
144  AVFrame **in = td->in;
145  AVFrame *out = td->out;
146  int i, p, x, y;
147 
148  if (s->depth <= 8) {
149  for (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  uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
153 
154  for (y = slice_start; y < slice_end; y++) {
155  for (x = 0; x < s->linesize[p]; x++) {
156  int val = 0;
157 
158  for (i = 0; i < s->nb_inputs; i++) {
159  uint8_t src = in[i]->data[p][y * in[i]->linesize[p] + x];
160 
161  val += src * s->weights[i];
162  }
163 
164  dst[x] = av_clip_uint8(val * s->wfactor);
165  }
166 
167  dst += out->linesize[p];
168  }
169  }
170  } else {
171  for (p = 0; p < s->nb_planes; p++) {
172  const int slice_start = (s->height[p] * jobnr) / nb_jobs;
173  const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
174  uint16_t *dst = (uint16_t *)(out->data[p] + slice_start * out->linesize[p]);
175 
176  for (y = slice_start; y < slice_end; y++) {
177  for (x = 0; x < s->linesize[p] / 2; x++) {
178  int val = 0;
179 
180  for (i = 0; i < s->nb_inputs; i++) {
181  uint16_t src = AV_RN16(in[i]->data[p] + y * in[i]->linesize[p] + x * 2);
182 
183  val += src * s->weights[i];
184  }
185 
186  dst[x] = av_clip(val * s->wfactor, 0, s->max);
187  }
188 
189  dst += out->linesize[p] / 2;
190  }
191  }
192  }
193 
194  return 0;
195 }
196 
198 {
199  AVFilterContext *ctx = fs->parent;
200  AVFilterLink *outlink = ctx->outputs[0];
201  MixContext *s = fs->opaque;
202  AVFrame **in = s->frames;
203  AVFrame *out;
204  ThreadData td;
205  int i, ret;
206 
207  for (i = 0; i < s->nb_inputs; i++) {
208  if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
209  return ret;
210  }
211 
212  if (ctx->is_disabled) {
213  out = av_frame_clone(s->frames[0]);
214  if (!out)
215  return AVERROR(ENOMEM);
216  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
217  return ff_filter_frame(outlink, out);
218  }
219 
220  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
221  if (!out)
222  return AVERROR(ENOMEM);
223  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
224 
225  td.in = in;
226  td.out = out;
228  FFMIN(s->height[0], ff_filter_get_nb_threads(ctx)));
229 
230  return ff_filter_frame(outlink, out);
231 }
232 
233 static int config_output(AVFilterLink *outlink)
234 {
235  AVFilterContext *ctx = outlink->src;
236  MixContext *s = ctx->priv;
237  AVRational frame_rate = ctx->inputs[0]->frame_rate;
238  AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
239  AVFilterLink *inlink = ctx->inputs[0];
240  int height = ctx->inputs[0]->h;
241  int width = ctx->inputs[0]->w;
242  FFFrameSyncIn *in;
243  int i, ret;
244 
245  if (!s->tmix) {
246  for (i = 1; i < s->nb_inputs; i++) {
247  if (ctx->inputs[i]->h != height || ctx->inputs[i]->w != width) {
248  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);
249  return AVERROR(EINVAL);
250  }
251  }
252  }
253 
254  s->desc = av_pix_fmt_desc_get(outlink->format);
255  if (!s->desc)
256  return AVERROR_BUG;
257  s->nb_planes = av_pix_fmt_count_planes(outlink->format);
258  s->depth = s->desc->comp[0].depth;
259  s->max = (1 << s->depth) - 1;
260 
261  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
262  return ret;
263 
264  s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
265  s->height[0] = s->height[3] = inlink->h;
266 
267  if (s->tmix)
268  return 0;
269 
270  outlink->w = width;
271  outlink->h = height;
272  outlink->frame_rate = frame_rate;
273  outlink->sample_aspect_ratio = sar;
274 
275  if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
276  return ret;
277 
278  in = s->fs.in;
279  s->fs.opaque = s;
280  s->fs.on_event = process_frame;
281 
282  for (i = 0; i < s->nb_inputs; i++) {
283  AVFilterLink *inlink = ctx->inputs[i];
284 
285  in[i].time_base = inlink->time_base;
286  in[i].sync = 1;
287  in[i].before = EXT_STOP;
288  in[i].after = (s->duration == 1 || (s->duration == 2 && i == 0)) ? EXT_STOP : EXT_INFINITY;
289  }
290 
291  ret = ff_framesync_configure(&s->fs);
292  outlink->time_base = s->fs.time_base;
293 
294  return ret;
295 }
296 
298 {
299  MixContext *s = ctx->priv;
300  int i;
301 
302  ff_framesync_uninit(&s->fs);
303  av_freep(&s->weights);
304 
305  if (s->tmix) {
306  for (i = 0; i < s->nb_frames && s->frames; i++)
307  av_frame_free(&s->frames[i]);
308  }
309  av_freep(&s->frames);
310 }
311 
312 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
313  char *res, int res_len, int flags)
314 {
315  int ret;
316 
317  ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
318  if (ret < 0)
319  return ret;
320 
321  return parse_weights(ctx);
322 }
323 
325 {
326  MixContext *s = ctx->priv;
327  return ff_framesync_activate(&s->fs);
328 }
329 
330 #define OFFSET(x) offsetof(MixContext, x)
331 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
332 #define TFLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
333 
334 static const AVOption mix_options[] = {
335  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT16_MAX, .flags = FLAGS },
336  { "weights", "set weight for each input", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1"}, 0, 0, .flags = TFLAGS },
337  { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = TFLAGS },
338  { "duration", "how to determine end of stream", OFFSET(duration), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, .flags = FLAGS, "duration" },
339  { "longest", "Duration of longest input", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "duration" },
340  { "shortest", "Duration of shortest input", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "duration" },
341  { "first", "Duration of first input", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "duration" },
342  { NULL },
343 };
344 
345 static const AVFilterPad outputs[] = {
346  {
347  .name = "default",
348  .type = AVMEDIA_TYPE_VIDEO,
349  .config_props = config_output,
350  },
351 };
352 
353 #if CONFIG_MIX_FILTER
355 
356 const AVFilter ff_vf_mix = {
357  .name = "mix",
358  .description = NULL_IF_CONFIG_SMALL("Mix video inputs."),
359  .priv_size = sizeof(MixContext),
360  .priv_class = &mix_class,
363  .init = init,
364  .uninit = uninit,
365  .activate = activate,
368  .process_command = process_command,
369 };
370 
371 #endif /* CONFIG_MIX_FILTER */
372 
373 #if CONFIG_TMIX_FILTER
374 static int tmix_filter_frame(AVFilterLink *inlink, AVFrame *in)
375 {
376  AVFilterContext *ctx = inlink->dst;
377  AVFilterLink *outlink = ctx->outputs[0];
378  MixContext *s = ctx->priv;
379  ThreadData td;
380  AVFrame *out;
381 
382  if (s->nb_inputs == 1)
383  return ff_filter_frame(outlink, in);
384 
385  if (s->nb_frames < s->nb_inputs) {
386  s->frames[s->nb_frames] = in;
387  s->nb_frames++;
388  if (s->nb_frames < s->nb_inputs)
389  return 0;
390  } else {
391  av_frame_free(&s->frames[0]);
392  memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1));
393  s->frames[s->nb_inputs - 1] = in;
394  }
395 
396  if (ctx->is_disabled) {
397  out = av_frame_clone(s->frames[0]);
398  if (!out)
399  return AVERROR(ENOMEM);
400  return ff_filter_frame(outlink, out);
401  }
402 
403  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
404  if (!out)
405  return AVERROR(ENOMEM);
406  out->pts = s->frames[0]->pts;
407 
408  td.out = out;
409  td.in = s->frames;
411  FFMIN(s->height[0], ff_filter_get_nb_threads(ctx)));
412 
413  return ff_filter_frame(outlink, out);
414 }
415 
416 static const AVOption tmix_options[] = {
417  { "frames", "set number of successive frames to mix", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=3}, 1, 128, .flags = FLAGS },
418  { "weights", "set weight for each frame", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1 1"}, 0, 0, .flags = TFLAGS },
419  { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = TFLAGS },
420  { NULL },
421 };
422 
423 static const AVFilterPad inputs[] = {
424  {
425  .name = "default",
426  .type = AVMEDIA_TYPE_VIDEO,
427  .filter_frame = tmix_filter_frame,
428  },
429 };
430 
432 
433 const AVFilter ff_vf_tmix = {
434  .name = "tmix",
435  .description = NULL_IF_CONFIG_SMALL("Mix successive video frames."),
436  .priv_size = sizeof(MixContext),
437  .priv_class = &tmix_class,
441  .init = init,
442  .uninit = uninit,
444  .process_command = process_command,
445 };
446 
447 #endif /* CONFIG_TMIX_FILTER */
formats
formats
Definition: signature.h:48
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:98
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:70
av_clip
#define av_clip
Definition: common.h:96
mix
static int mix(int c0, int c1)
Definition: 4xm.c:716
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:1019
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2540
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
ff_formats_pixdesc_filter
int ff_formats_pixdesc_filter(AVFilterFormats **rfmts, unsigned want, unsigned rej)
Construct a formats list containing all pixel formats with certain properties.
Definition: formats.c:454
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:113
AV_RN16
#define AV_RN16(p)
Definition: intreadwrite.h:360
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:112
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
MixContext::depth
int depth
Definition: vf_mix.c:46
pixdesc.h
ff_vf_mix
const AVFilter ff_vf_mix
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_mix.c:297
MixContext::scale
float scale
Definition: vf_mix.c:40
AVOption
AVOption.
Definition: opt.h:247
TFLAGS
#define TFLAGS
Definition: vf_mix.c:332
MixContext
Definition: af_amix.c:158
data
const char data[16]
Definition: mxf.c:143
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:153
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:492
video.h
mix_frames
static int mix_frames(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_mix.c:140
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
MixContext::nb_frames
int nb_frames
Definition: vf_mix.c:44
formats.h
FLAGS
#define FLAGS
Definition: vf_mix.c:331
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2580
EXT_STOP
@ EXT_STOP
Completely stop all streams with this one.
Definition: framesync.h:65
MixContext::duration
int duration
Definition: vf_mix.c:38
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:43
val
static double val(void *priv, double ch)
Definition: aeval.c:76
activate
static int activate(AVFilterContext *ctx)
Definition: vf_mix.c:324
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:110
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:50
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
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
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:697
duration
int64_t duration
Definition: movenc.c:64
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_mix.c:233
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:257
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:51
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2041
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:186
ctx
AVFormatContext * ctx
Definition: movenc.c:48
MixContext::fs
FFFrameSync fs
Definition: vf_mix.c:53
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:424
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:141
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:152
arg
const char * arg
Definition: jacosubdec.c:67
av_sscanf
int av_sscanf(const char *string, const char *format,...)
See libc sscanf manual for more information.
Definition: avsscanf.c:960
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:259
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:145
src
#define src
Definition: vp8dsp.c:255
process_frame
static int process_frame(FFFrameSync *fs)
Definition: vf_mix.c:197
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:117
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_mix.c:56
MixContext::linesize
int linesize[4]
Definition: vf_mix.c:49
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
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:883
MixContext::height
int height[4]
Definition: vf_mix.c:50
height
#define height
internal.h
AVFILTER_DEFINE_CLASS
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:289
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:227
i
int i
Definition: input.c:406
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:804
ThreadData
Used for passing data between threads.
Definition: dsddec.c:67
MixContext::max
int max
Definition: vf_mix.c:47
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:56
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:271
MixContext::wfactor
float wfactor
Definition: vf_mix.c:41
AVFilter
Filter definition.
Definition: avfilter.h:149
ret
ret
Definition: filter_design.txt:187
AVFilterPad::type
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:61
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:330
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:104
framesync.h
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:224
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:312
av_clip_uint8
#define av_clip_uint8
Definition: common.h:102
AVFilterContext
An instance of a filter.
Definition: avfilter.h:346
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:121
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
mix_options
static const AVOption mix_options[]
Definition: vf_mix.c:334
MixContext::nb_planes
int nb_planes
Definition: vf_mix.c:48
ThreadData::in
AVFrame * in
Definition: af_adecorrelate.c:171
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:153
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
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:138
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
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:334
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
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:228
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:143
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:233
outputs
static const AVFilterPad outputs[]
Definition: vf_mix.c:345
MixContext::desc
const AVPixFmtDescriptor * desc
Definition: vf_mix.c:35
MixContext::frames
AVFrame ** frames
Definition: vf_mix.c:52
MixContext::nb_inputs
int nb_inputs
number of inputs
Definition: af_amix.c:162