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 
61  ret = ff_formats_pixdesc_filter(&formats, 0,
65  if (ret < 0)
66  return ret;
67  return ff_set_common_formats(ctx, formats);
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_insert_inpad(ctx, i, &pad)) < 0) {
129  av_freep(&pad.name);
130  return ret;
131  }
132  }
133  }
134 
135  return parse_weights(ctx);
136 }
137 
138 typedef struct ThreadData {
139  AVFrame **in, *out;
140 } ThreadData;
141 
142 static int mix_frames(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
143 {
144  MixContext *s = ctx->priv;
145  ThreadData *td = arg;
146  AVFrame **in = td->in;
147  AVFrame *out = td->out;
148  int i, p, x, y;
149 
150  if (s->depth <= 8) {
151  for (p = 0; p < s->nb_planes; p++) {
152  const int slice_start = (s->height[p] * jobnr) / nb_jobs;
153  const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
154  uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
155 
156  for (y = slice_start; y < slice_end; y++) {
157  for (x = 0; x < s->linesize[p]; x++) {
158  int val = 0;
159 
160  for (i = 0; i < s->nb_inputs; i++) {
161  uint8_t src = in[i]->data[p][y * in[i]->linesize[p] + x];
162 
163  val += src * s->weights[i];
164  }
165 
166  dst[x] = av_clip_uint8(val * s->wfactor);
167  }
168 
169  dst += out->linesize[p];
170  }
171  }
172  } else {
173  for (p = 0; p < s->nb_planes; p++) {
174  const int slice_start = (s->height[p] * jobnr) / nb_jobs;
175  const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
176  uint16_t *dst = (uint16_t *)(out->data[p] + slice_start * out->linesize[p]);
177 
178  for (y = slice_start; y < slice_end; y++) {
179  for (x = 0; x < s->linesize[p] / 2; x++) {
180  int val = 0;
181 
182  for (i = 0; i < s->nb_inputs; i++) {
183  uint16_t src = AV_RN16(in[i]->data[p] + y * in[i]->linesize[p] + x * 2);
184 
185  val += src * s->weights[i];
186  }
187 
188  dst[x] = av_clip(val * s->wfactor, 0, s->max);
189  }
190 
191  dst += out->linesize[p] / 2;
192  }
193  }
194  }
195 
196  return 0;
197 }
198 
200 {
201  AVFilterContext *ctx = fs->parent;
202  AVFilterLink *outlink = ctx->outputs[0];
203  MixContext *s = fs->opaque;
204  AVFrame **in = s->frames;
205  AVFrame *out;
206  ThreadData td;
207  int i, ret;
208 
209  for (i = 0; i < s->nb_inputs; i++) {
210  if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
211  return ret;
212  }
213 
214  if (ctx->is_disabled) {
215  out = av_frame_clone(s->frames[0]);
216  if (!out)
217  return AVERROR(ENOMEM);
218  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
219  return ff_filter_frame(outlink, out);
220  }
221 
222  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
223  if (!out)
224  return AVERROR(ENOMEM);
225  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
226 
227  td.in = in;
228  td.out = out;
229  ctx->internal->execute(ctx, mix_frames, &td, NULL, FFMIN(s->height[0], ff_filter_get_nb_threads(ctx)));
230 
231  return ff_filter_frame(outlink, out);
232 }
233 
234 static int config_output(AVFilterLink *outlink)
235 {
236  AVFilterContext *ctx = outlink->src;
237  MixContext *s = ctx->priv;
238  AVRational frame_rate = ctx->inputs[0]->frame_rate;
239  AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
240  AVFilterLink *inlink = ctx->inputs[0];
241  int height = ctx->inputs[0]->h;
242  int width = ctx->inputs[0]->w;
243  FFFrameSyncIn *in;
244  int i, ret;
245 
246  if (!s->tmix) {
247  for (i = 1; i < s->nb_inputs; i++) {
248  if (ctx->inputs[i]->h != height || ctx->inputs[i]->w != width) {
249  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);
250  return AVERROR(EINVAL);
251  }
252  }
253  }
254 
255  s->desc = av_pix_fmt_desc_get(outlink->format);
256  if (!s->desc)
257  return AVERROR_BUG;
259  s->depth = s->desc->comp[0].depth;
260  s->max = (1 << s->depth) - 1;
261 
262  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
263  return ret;
264 
265  s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
266  s->height[0] = s->height[3] = inlink->h;
267 
268  if (s->tmix)
269  return 0;
270 
271  outlink->w = width;
272  outlink->h = height;
273  outlink->frame_rate = frame_rate;
274  outlink->sample_aspect_ratio = sar;
275 
276  if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
277  return ret;
278 
279  in = s->fs.in;
280  s->fs.opaque = s;
282 
283  for (i = 0; i < s->nb_inputs; i++) {
284  AVFilterLink *inlink = ctx->inputs[i];
285 
286  in[i].time_base = inlink->time_base;
287  in[i].sync = 1;
288  in[i].before = EXT_STOP;
289  in[i].after = (s->duration == 1 || (s->duration == 2 && i == 0)) ? EXT_STOP : EXT_INFINITY;
290  }
291 
292  ret = ff_framesync_configure(&s->fs);
293  outlink->time_base = s->fs.time_base;
294 
295  return ret;
296 }
297 
299 {
300  MixContext *s = ctx->priv;
301  int i;
302 
303  ff_framesync_uninit(&s->fs);
304  av_freep(&s->weights);
305 
306  if (!s->tmix) {
307  for (i = 0; i < ctx->nb_inputs; i++)
308  av_freep(&ctx->input_pads[i].name);
309  } else {
310  for (i = 0; i < s->nb_frames && s->frames; i++)
311  av_frame_free(&s->frames[i]);
312  }
313  av_freep(&s->frames);
314 }
315 
316 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
317  char *res, int res_len, int flags)
318 {
319  int ret;
320 
321  ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
322  if (ret < 0)
323  return ret;
324 
325  return parse_weights(ctx);
326 }
327 
329 {
330  MixContext *s = ctx->priv;
331  return ff_framesync_activate(&s->fs);
332 }
333 
334 #define OFFSET(x) offsetof(MixContext, x)
335 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
336 #define TFLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
337 
338 static const AVOption mix_options[] = {
339  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT16_MAX, .flags = FLAGS },
340  { "weights", "set weight for each input", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1"}, 0, 0, .flags = TFLAGS },
341  { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = TFLAGS },
342  { "duration", "how to determine end of stream", OFFSET(duration), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, .flags = FLAGS, "duration" },
343  { "longest", "Duration of longest input", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "duration" },
344  { "shortest", "Duration of shortest input", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "duration" },
345  { "first", "Duration of first input", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "duration" },
346  { NULL },
347 };
348 
349 static const AVFilterPad outputs[] = {
350  {
351  .name = "default",
352  .type = AVMEDIA_TYPE_VIDEO,
353  .config_props = config_output,
354  },
355  { NULL }
356 };
357 
358 #if CONFIG_MIX_FILTER
360 
362  .name = "mix",
363  .description = NULL_IF_CONFIG_SMALL("Mix video inputs."),
364  .priv_size = sizeof(MixContext),
365  .priv_class = &mix_class,
367  .outputs = outputs,
368  .init = init,
369  .uninit = uninit,
370  .activate = activate,
374 };
375 
376 #endif /* CONFIG_MIX_FILTER */
377 
378 #if CONFIG_TMIX_FILTER
379 static int tmix_filter_frame(AVFilterLink *inlink, AVFrame *in)
380 {
381  AVFilterContext *ctx = inlink->dst;
382  AVFilterLink *outlink = ctx->outputs[0];
383  MixContext *s = ctx->priv;
384  ThreadData td;
385  AVFrame *out;
386 
387  if (s->nb_inputs == 1)
388  return ff_filter_frame(outlink, in);
389 
390  if (s->nb_frames < s->nb_inputs) {
391  s->frames[s->nb_frames] = in;
392  s->nb_frames++;
393  if (s->nb_frames < s->nb_inputs)
394  return 0;
395  } else {
396  av_frame_free(&s->frames[0]);
397  memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1));
398  s->frames[s->nb_inputs - 1] = in;
399  }
400 
401  if (ctx->is_disabled) {
402  out = av_frame_clone(s->frames[0]);
403  if (!out)
404  return AVERROR(ENOMEM);
405  return ff_filter_frame(outlink, out);
406  }
407 
408  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
409  if (!out)
410  return AVERROR(ENOMEM);
411  out->pts = s->frames[0]->pts;
412 
413  td.out = out;
414  td.in = s->frames;
415  ctx->internal->execute(ctx, mix_frames, &td, NULL, FFMIN(s->height[0], ff_filter_get_nb_threads(ctx)));
416 
417  return ff_filter_frame(outlink, out);
418 }
419 
420 static const AVOption tmix_options[] = {
421  { "frames", "set number of successive frames to mix", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=3}, 1, 128, .flags = FLAGS },
422  { "weights", "set weight for each frame", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1 1"}, 0, 0, .flags = TFLAGS },
423  { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = TFLAGS },
424  { NULL },
425 };
426 
427 static const AVFilterPad inputs[] = {
428  {
429  .name = "default",
430  .type = AVMEDIA_TYPE_VIDEO,
431  .filter_frame = tmix_filter_frame,
432  },
433  { NULL }
434 };
435 
437 
439  .name = "tmix",
440  .description = NULL_IF_CONFIG_SMALL("Mix successive video frames."),
441  .priv_size = sizeof(MixContext),
442  .priv_class = &tmix_class,
444  .outputs = outputs,
445  .inputs = inputs,
446  .init = init,
447  .uninit = uninit,
450 };
451 
452 #endif /* CONFIG_TMIX_FILTER */
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
Definition: pixdesc.h:132
int nb_planes
Definition: vf_mix.c:48
#define NULL
Definition: coverity.c:32
AVFrame * out
Definition: af_adeclick.c:502
int depth
Definition: vf_mix.c:46
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
This structure describes decoded (raw) audio or video data.
Definition: frame.h:314
AVOption.
Definition: opt.h:248
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
misc image utilities
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2613
Main libavfilter public API header.
#define AVFILTER_FLAG_DYNAMIC_INPUTS
The number of the filter inputs is not determined just by AVFilter.inputs.
Definition: avfilter.h:106
const AVPixFmtDescriptor * desc
Definition: vf_mix.c:35
AVFilter ff_vf_tmix
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:124
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:99
#define TFLAGS
Definition: vf_mix.c:336
#define FLAGS
Definition: vf_mix.c:335
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:388
int64_t pts
Timestamp of the current event.
Definition: framesync.h:167
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_mix.c:298
enum FFFrameSyncExtMode before
Extrapolation mode for timestamps before the first frame.
Definition: framesync.h:86
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:245
float scale
Definition: vf_mix.c:40
const char * name
Pad name.
Definition: internal.h:60
static int activate(AVFilterContext *ctx)
Definition: vf_mix.c:328
AVFilterContext * parent
Parent filter context.
Definition: framesync.h:152
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:349
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1094
static int mix_frames(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_mix.c:142
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:368
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
#define av_cold
Definition: attributes.h:88
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:407
FFFrameSyncIn * in
Pointer to array of inputs.
Definition: framesync.h:203
#define av_clip
Definition: common.h:122
FFFrameSync fs
Definition: vf_mix.c:53
int duration
Definition: vf_mix.c:38
enum FFFrameSyncExtMode after
Extrapolation mode for timestamps after the last frame.
Definition: framesync.h:91
Input stream structure.
Definition: framesync.h:81
int nb_frames
Definition: vf_mix.c:44
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:54
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
#define src
Definition: vp8dsp.c:255
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:348
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
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:588
#define td
Definition: regdef.h:70
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
void ff_framesync_uninit(FFFrameSync *fs)
Free all memory currently allocated.
Definition: framesync.c:290
Frame sync structure.
Definition: framesync.h:146
int tmix
Definition: vf_mix.c:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:115
static int config_output(AVFilterLink *outlink)
Definition: vf_mix.c:234
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
void * priv
private data for use by the filter
Definition: avfilter.h:356
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:117
const char * arg
Definition: jacosubdec.c:66
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:140
AVRational time_base
Time base for the incoming frames.
Definition: framesync.h:96
int ff_framesync_activate(FFFrameSync *fs)
Examine the frames in the filter&#39;s input and try to produce output.
Definition: framesync.c:341
int(* on_event)(struct FFFrameSync *fs)
Callback called when a frame event is ready.
Definition: framesync.h:172
int linesize[4]
Definition: vf_mix.c:49
int av_sscanf(const char *string, const char *format,...)
See libc sscanf manual for more information.
Definition: avsscanf.c:962
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
int height[4]
Definition: vf_mix.c:50
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:802
unsigned nb_inputs
number of input pads
Definition: avfilter.h:350
#define FFMIN(a, b)
Definition: common.h:105
#define width
static int process_frame(FFFrameSync *fs)
Definition: vf_mix.c:199
AVFormatContext * ctx
Definition: movenc.c:48
AVRational time_base
Time base for the output events.
Definition: framesync.h:162
#define s(width, name)
Definition: cbs_vp9.c:257
AVFilter ff_vf_mix
void * opaque
Opaque pointer, not used by the API.
Definition: framesync.h:177
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:540
static int mix(int c0, int c1)
Definition: 4xm.c:715
Extend the frame to infinity.
Definition: framesync.h:75
static int query_formats(AVFilterContext *ctx)
Definition: vf_mix.c:56
Used for passing data between threads.
Definition: dsddec.c:67
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:345
int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
Initialize a frame sync structure.
Definition: framesync.c:84
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
#define AV_RN16(p)
Definition: intreadwrite.h:360
char * weights_str
string for custom weights for every input
Definition: af_amix.c:166
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
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31))))#define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac){}void ff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map){AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);return NULL;}return ac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;}int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){int use_generic=1;int len=in->nb_samples;int p;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
unsigned sync
Synchronization level: frames on input at the highest sync level will generate output frame events...
Definition: framesync.h:139
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:145
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
Rational number (pair of numerator and denominator).
Definition: rational.h:58
const char * name
Filter name.
Definition: avfilter.h:149
#define OFFSET(x)
Definition: vf_mix.c:334
#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:134
#define AV_PIX_FMT_FLAG_BITSTREAM
All values of a component are bit-wise packed end to end.
Definition: pixdesc.h:136
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:353
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:381
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:328
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_mix.c:316
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
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
int max
Definition: vf_mix.c:47
avfilter_execute_func * execute
Definition: internal.h:136
float * weights
custom weights for every input
Definition: af_amix.c:175
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2033
Completely stop all streams with this one.
Definition: framesync.h:65
static av_cold int init(AVFilterContext *ctx)
Definition: vf_mix.c:104
#define av_clip_uint8
Definition: common.h:128
float wfactor
Definition: vf_mix.c:41
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:288
A list of supported formats for one end of a filter link.
Definition: formats.h:65
int nb_inputs
number of inputs
Definition: af_amix.c:162
AVFrame ** frames
Definition: vf_mix.c:52
An instance of a filter.
Definition: avfilter.h:341
FILE * out
Definition: movenc.c:54
#define av_freep(p)
static const AVOption mix_options[]
Definition: vf_mix.c:338
static const AVFilterPad outputs[]
Definition: vf_mix.c:349
AVFrame * in
Definition: af_adenorm.c:223
formats
Definition: signature.h:48
internal API functions
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
int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe, unsigned get)
Get the current frame in an input.
Definition: framesync.c:253
int depth
Number of bits in the component.
Definition: pixdesc.h:58
static int parse_weights(AVFilterContext *ctx)
Definition: vf_mix.c:70
static double val(void *priv, double ch)
Definition: aeval.c:76
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:344
int i
Definition: input.c:407
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
static int ff_insert_inpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new input pad for the filter.
Definition: internal.h:240