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 "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 {
58  int reject_flags = AV_PIX_FMT_FLAG_BITSTREAM |
61 
62  return ff_set_common_formats(ctx, ff_formats_pixdesc_filter(0, reject_flags));
63 }
64 
66 {
67  MixContext *s = ctx->priv;
68  char *p, *arg, *saveptr = NULL;
69  int i, last = 0;
70 
71  s->wfactor = 0.f;
72  p = s->weights_str;
73  for (i = 0; i < s->nb_inputs; i++) {
74  if (!(arg = av_strtok(p, " |", &saveptr)))
75  break;
76 
77  p = NULL;
78  if (av_sscanf(arg, "%f", &s->weights[i]) != 1) {
79  av_log(ctx, AV_LOG_ERROR, "Invalid syntax for weights[%d].\n", i);
80  return AVERROR(EINVAL);
81  }
82  s->wfactor += s->weights[i];
83  last = i;
84  }
85 
86  for (; i < s->nb_inputs; i++) {
87  s->weights[i] = s->weights[last];
88  s->wfactor += s->weights[i];
89  }
90  if (s->scale == 0) {
91  s->wfactor = 1 / s->wfactor;
92  } else {
93  s->wfactor = s->scale;
94  }
95 
96  return 0;
97 }
98 
100 {
101  MixContext *s = ctx->priv;
102  int ret;
103 
104  s->tmix = !strcmp(ctx->filter->name, "tmix");
105 
106  s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
107  if (!s->frames)
108  return AVERROR(ENOMEM);
109 
110  s->weights = av_calloc(s->nb_inputs, sizeof(*s->weights));
111  if (!s->weights)
112  return AVERROR(ENOMEM);
113 
114  if (!s->tmix) {
115  for (int i = 0; i < s->nb_inputs; i++) {
116  AVFilterPad pad = { 0 };
117 
118  pad.type = AVMEDIA_TYPE_VIDEO;
119  pad.name = av_asprintf("input%d", i);
120  if (!pad.name)
121  return AVERROR(ENOMEM);
122 
123  if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
124  return ret;
125  }
126  }
127 
128  return parse_weights(ctx);
129 }
130 
131 typedef struct ThreadData {
132  AVFrame **in, *out;
133 } ThreadData;
134 
135 static int mix_frames(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
136 {
137  MixContext *s = ctx->priv;
138  ThreadData *td = arg;
139  AVFrame **in = td->in;
140  AVFrame *out = td->out;
141  int i, p, x, y;
142 
143  if (s->depth <= 8) {
144  for (p = 0; p < s->nb_planes; p++) {
145  const int slice_start = (s->height[p] * jobnr) / nb_jobs;
146  const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
147  uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
148 
149  for (y = slice_start; y < slice_end; y++) {
150  for (x = 0; x < s->linesize[p]; x++) {
151  int val = 0;
152 
153  for (i = 0; i < s->nb_inputs; i++) {
154  uint8_t src = in[i]->data[p][y * in[i]->linesize[p] + x];
155 
156  val += src * s->weights[i];
157  }
158 
159  dst[x] = av_clip_uint8(val * s->wfactor);
160  }
161 
162  dst += out->linesize[p];
163  }
164  }
165  } else {
166  for (p = 0; p < s->nb_planes; p++) {
167  const int slice_start = (s->height[p] * jobnr) / nb_jobs;
168  const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
169  uint16_t *dst = (uint16_t *)(out->data[p] + slice_start * out->linesize[p]);
170 
171  for (y = slice_start; y < slice_end; y++) {
172  for (x = 0; x < s->linesize[p] / 2; x++) {
173  int val = 0;
174 
175  for (i = 0; i < s->nb_inputs; i++) {
176  uint16_t src = AV_RN16(in[i]->data[p] + y * in[i]->linesize[p] + x * 2);
177 
178  val += src * s->weights[i];
179  }
180 
181  dst[x] = av_clip(val * s->wfactor, 0, s->max);
182  }
183 
184  dst += out->linesize[p] / 2;
185  }
186  }
187  }
188 
189  return 0;
190 }
191 
193 {
194  AVFilterContext *ctx = fs->parent;
195  AVFilterLink *outlink = ctx->outputs[0];
196  MixContext *s = fs->opaque;
197  AVFrame **in = s->frames;
198  AVFrame *out;
199  ThreadData td;
200  int i, ret;
201 
202  for (i = 0; i < s->nb_inputs; i++) {
203  if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
204  return ret;
205  }
206 
207  if (ctx->is_disabled) {
208  out = av_frame_clone(s->frames[0]);
209  if (!out)
210  return AVERROR(ENOMEM);
211  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
212  return ff_filter_frame(outlink, out);
213  }
214 
215  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
216  if (!out)
217  return AVERROR(ENOMEM);
218  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
219 
220  td.in = in;
221  td.out = out;
223  FFMIN(s->height[0], ff_filter_get_nb_threads(ctx)));
224 
225  return ff_filter_frame(outlink, out);
226 }
227 
228 static int config_output(AVFilterLink *outlink)
229 {
230  AVFilterContext *ctx = outlink->src;
231  MixContext *s = ctx->priv;
232  AVRational frame_rate = ctx->inputs[0]->frame_rate;
233  AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
234  AVFilterLink *inlink = ctx->inputs[0];
235  int height = ctx->inputs[0]->h;
236  int width = ctx->inputs[0]->w;
237  FFFrameSyncIn *in;
238  int i, ret;
239 
240  if (!s->tmix) {
241  for (i = 1; i < s->nb_inputs; i++) {
242  if (ctx->inputs[i]->h != height || ctx->inputs[i]->w != width) {
243  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);
244  return AVERROR(EINVAL);
245  }
246  }
247  }
248 
249  s->desc = av_pix_fmt_desc_get(outlink->format);
250  if (!s->desc)
251  return AVERROR_BUG;
252  s->nb_planes = av_pix_fmt_count_planes(outlink->format);
253  s->depth = s->desc->comp[0].depth;
254  s->max = (1 << s->depth) - 1;
255 
256  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
257  return ret;
258 
259  s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
260  s->height[0] = s->height[3] = inlink->h;
261 
262  if (s->tmix)
263  return 0;
264 
265  outlink->w = width;
266  outlink->h = height;
267  outlink->frame_rate = frame_rate;
268  outlink->sample_aspect_ratio = sar;
269 
270  if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
271  return ret;
272 
273  in = s->fs.in;
274  s->fs.opaque = s;
275  s->fs.on_event = process_frame;
276 
277  for (i = 0; i < s->nb_inputs; i++) {
278  AVFilterLink *inlink = ctx->inputs[i];
279 
280  in[i].time_base = inlink->time_base;
281  in[i].sync = 1;
282  in[i].before = EXT_STOP;
283  in[i].after = (s->duration == 1 || (s->duration == 2 && i == 0)) ? EXT_STOP : EXT_INFINITY;
284  }
285 
286  ret = ff_framesync_configure(&s->fs);
287  outlink->time_base = s->fs.time_base;
288 
289  return ret;
290 }
291 
293 {
294  MixContext *s = ctx->priv;
295  int i;
296 
297  ff_framesync_uninit(&s->fs);
298  av_freep(&s->weights);
299 
300  if (s->tmix) {
301  for (i = 0; i < s->nb_frames && s->frames; i++)
302  av_frame_free(&s->frames[i]);
303  }
304  av_freep(&s->frames);
305 }
306 
307 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
308  char *res, int res_len, int flags)
309 {
310  int ret;
311 
312  ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
313  if (ret < 0)
314  return ret;
315 
316  return parse_weights(ctx);
317 }
318 
320 {
321  MixContext *s = ctx->priv;
322  return ff_framesync_activate(&s->fs);
323 }
324 
325 #define OFFSET(x) offsetof(MixContext, x)
326 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
327 #define TFLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
328 
329 static const AVOption mix_options[] = {
330  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT16_MAX, .flags = FLAGS },
331  { "weights", "set weight for each input", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1"}, 0, 0, .flags = TFLAGS },
332  { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = TFLAGS },
333  { "duration", "how to determine end of stream", OFFSET(duration), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, .flags = FLAGS, "duration" },
334  { "longest", "Duration of longest input", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "duration" },
335  { "shortest", "Duration of shortest input", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "duration" },
336  { "first", "Duration of first input", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "duration" },
337  { NULL },
338 };
339 
340 static const AVFilterPad outputs[] = {
341  {
342  .name = "default",
343  .type = AVMEDIA_TYPE_VIDEO,
344  .config_props = config_output,
345  },
346 };
347 
348 #if CONFIG_MIX_FILTER
350 
351 const AVFilter ff_vf_mix = {
352  .name = "mix",
353  .description = NULL_IF_CONFIG_SMALL("Mix video inputs."),
354  .priv_size = sizeof(MixContext),
355  .priv_class = &mix_class,
358  .init = init,
359  .uninit = uninit,
360  .activate = activate,
363  .process_command = process_command,
364 };
365 
366 #endif /* CONFIG_MIX_FILTER */
367 
368 #if CONFIG_TMIX_FILTER
369 static int tmix_filter_frame(AVFilterLink *inlink, AVFrame *in)
370 {
371  AVFilterContext *ctx = inlink->dst;
372  AVFilterLink *outlink = ctx->outputs[0];
373  MixContext *s = ctx->priv;
374  ThreadData td;
375  AVFrame *out;
376 
377  if (s->nb_inputs == 1)
378  return ff_filter_frame(outlink, in);
379 
380  if (s->nb_frames < s->nb_inputs) {
381  s->frames[s->nb_frames] = in;
382  s->nb_frames++;
383  if (s->nb_frames < s->nb_inputs)
384  return 0;
385  } else {
386  av_frame_free(&s->frames[0]);
387  memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1));
388  s->frames[s->nb_inputs - 1] = in;
389  }
390 
391  if (ctx->is_disabled) {
392  out = av_frame_clone(s->frames[0]);
393  if (!out)
394  return AVERROR(ENOMEM);
395  return ff_filter_frame(outlink, out);
396  }
397 
398  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
399  if (!out)
400  return AVERROR(ENOMEM);
401  out->pts = s->frames[0]->pts;
402 
403  td.out = out;
404  td.in = s->frames;
406  FFMIN(s->height[0], ff_filter_get_nb_threads(ctx)));
407 
408  return ff_filter_frame(outlink, out);
409 }
410 
411 static const AVOption tmix_options[] = {
412  { "frames", "set number of successive frames to mix", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=3}, 1, 128, .flags = FLAGS },
413  { "weights", "set weight for each frame", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1 1"}, 0, 0, .flags = TFLAGS },
414  { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = TFLAGS },
415  { NULL },
416 };
417 
418 static const AVFilterPad inputs[] = {
419  {
420  .name = "default",
421  .type = AVMEDIA_TYPE_VIDEO,
422  .filter_frame = tmix_filter_frame,
423  },
424 };
425 
427 
428 const AVFilter ff_vf_tmix = {
429  .name = "tmix",
430  .description = NULL_IF_CONFIG_SMALL("Mix successive video frames."),
431  .priv_size = sizeof(MixContext),
432  .priv_class = &tmix_class,
436  .init = init,
437  .uninit = uninit,
439  .process_command = process_command,
440 };
441 
442 #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: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:65
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:1018
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2564
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: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:292
MixContext::scale
float scale
Definition: vf_mix.c:40
AVOption
AVOption.
Definition: opt.h:247
TFLAGS
#define TFLAGS
Definition: vf_mix.c:327
MixContext
Definition: af_amix.c:158
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:168
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:473
video.h
mix_frames
static int mix_frames(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_mix.c:135
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
MixContext::nb_frames
int nb_frames
Definition: vf_mix.c:44
formats.h
FLAGS
#define FLAGS
Definition: vf_mix.c:326
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2604
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:319
scale
static av_always_inline float scale(float x, float s)
Definition: vf_v360.c:1377
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:699
duration
int64_t duration
Definition: movenc.c:64
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_mix.c:228
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:191
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:144
src
#define src
Definition: vp8dsp.c:255
process_frame
static int process_frame(FFFrameSync *fs)
Definition: vf_mix.c:192
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:882
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:326
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:227
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:457
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:803
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:325
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:99
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:307
av_clip_uint8
#define av_clip_uint8
Definition: common.h:102
AVFilterContext
An instance of a filter.
Definition: avfilter.h:386
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:329
MixContext::nb_planes
int nb_planes
Definition: vf_mix.c:48
ThreadData::in
AVFrame * in
Definition: af_adecorrelate.c:154
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:192
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:340
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