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 fmt, ret;
60 
61  for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
63  if (!(desc->flags & AV_PIX_FMT_FLAG_PAL ||
66  (ret = ff_add_format(&pix_fmts, fmt)) < 0)
67  return ret;
68  }
69 
70  return ff_set_common_formats(ctx, pix_fmts);
71 }
72 
74 {
75  MixContext *s = ctx->priv;
76  char *p, *arg, *saveptr = NULL;
77  int i, ret, last = 0;
78 
79  s->tmix = !strcmp(ctx->filter->name, "tmix");
80 
81  s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
82  if (!s->frames)
83  return AVERROR(ENOMEM);
84 
85  s->weights = av_calloc(s->nb_inputs, sizeof(*s->weights));
86  if (!s->weights)
87  return AVERROR(ENOMEM);
88 
89  if (!s->tmix) {
90  for (i = 0; i < s->nb_inputs; i++) {
91  AVFilterPad pad = { 0 };
92 
94  pad.name = av_asprintf("input%d", i);
95  if (!pad.name)
96  return AVERROR(ENOMEM);
97 
98  if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) {
99  av_freep(&pad.name);
100  return ret;
101  }
102  }
103  }
104 
105  p = s->weights_str;
106  for (i = 0; i < s->nb_inputs; i++) {
107  if (!(arg = av_strtok(p, " ", &saveptr)))
108  break;
109 
110  p = NULL;
111  if (av_sscanf(arg, "%f", &s->weights[i]) != 1) {
112  av_log(ctx, AV_LOG_ERROR, "Invalid syntax for weights[%d].\n", i);
113  return AVERROR(EINVAL);
114  }
115  s->wfactor += s->weights[i];
116  last = i;
117  }
118  for (; i < s->nb_inputs; i++) {
119  s->weights[i] = s->weights[last];
120  s->wfactor += s->weights[i];
121  }
122  if (s->scale == 0) {
123  s->wfactor = 1 / s->wfactor;
124  } else {
125  s->wfactor = s->scale;
126  }
127 
128  return 0;
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  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
208  if (!out)
209  return AVERROR(ENOMEM);
210  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
211 
212  td.in = in;
213  td.out = out;
214  ctx->internal->execute(ctx, mix_frames, &td, NULL, FFMIN(s->height[0], ff_filter_get_nb_threads(ctx)));
215 
216  return ff_filter_frame(outlink, out);
217 }
218 
219 static int config_output(AVFilterLink *outlink)
220 {
221  AVFilterContext *ctx = outlink->src;
222  MixContext *s = ctx->priv;
223  AVRational frame_rate = ctx->inputs[0]->frame_rate;
224  AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
225  AVFilterLink *inlink = ctx->inputs[0];
226  int height = ctx->inputs[0]->h;
227  int width = ctx->inputs[0]->w;
228  FFFrameSyncIn *in;
229  int i, ret;
230 
231  if (!s->tmix) {
232  for (i = 1; i < s->nb_inputs; i++) {
233  if (ctx->inputs[i]->h != height || ctx->inputs[i]->w != width) {
234  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);
235  return AVERROR(EINVAL);
236  }
237  }
238  }
239 
240  s->desc = av_pix_fmt_desc_get(outlink->format);
241  if (!s->desc)
242  return AVERROR_BUG;
244  s->depth = s->desc->comp[0].depth;
245  s->max = (1 << s->depth) - 1;
246 
247  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
248  return ret;
249 
250  s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
251  s->height[0] = s->height[3] = inlink->h;
252 
253  if (s->tmix)
254  return 0;
255 
256  outlink->w = width;
257  outlink->h = height;
258  outlink->frame_rate = frame_rate;
259  outlink->sample_aspect_ratio = sar;
260 
261  if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
262  return ret;
263 
264  in = s->fs.in;
265  s->fs.opaque = s;
267 
268  for (i = 0; i < s->nb_inputs; i++) {
269  AVFilterLink *inlink = ctx->inputs[i];
270 
271  in[i].time_base = inlink->time_base;
272  in[i].sync = 1;
273  in[i].before = EXT_STOP;
274  in[i].after = (s->duration == 1 || (s->duration == 2 && i == 0)) ? EXT_STOP : EXT_INFINITY;
275  }
276 
277  ret = ff_framesync_configure(&s->fs);
278  outlink->time_base = s->fs.time_base;
279 
280  return ret;
281 }
282 
284 {
285  MixContext *s = ctx->priv;
286  int i;
287 
288  ff_framesync_uninit(&s->fs);
289  av_freep(&s->weights);
290 
291  if (!s->tmix) {
292  for (i = 0; i < ctx->nb_inputs; i++)
293  av_freep(&ctx->input_pads[i].name);
294  } else {
295  for (i = 0; i < s->nb_frames && s->frames; i++)
296  av_frame_free(&s->frames[i]);
297  }
298  av_freep(&s->frames);
299 }
300 
302 {
303  MixContext *s = ctx->priv;
304  return ff_framesync_activate(&s->fs);
305 }
306 
307 #define OFFSET(x) offsetof(MixContext, x)
308 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
309 
310 static const AVOption mix_options[] = {
311  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT16_MAX, .flags = FLAGS },
312  { "weights", "set weight for each input", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1"}, 0, 0, .flags = FLAGS },
313  { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = FLAGS },
314  { "duration", "how to determine end of stream", OFFSET(duration), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, .flags = FLAGS, "duration" },
315  { "longest", "Duration of longest input", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "duration" },
316  { "shortest", "Duration of shortest input", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "duration" },
317  { "first", "Duration of first input", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "duration" },
318  { NULL },
319 };
320 
321 static const AVFilterPad outputs[] = {
322  {
323  .name = "default",
324  .type = AVMEDIA_TYPE_VIDEO,
325  .config_props = config_output,
326  },
327  { NULL }
328 };
329 
330 #if CONFIG_MIX_FILTER
332 
334  .name = "mix",
335  .description = NULL_IF_CONFIG_SMALL("Mix video inputs."),
336  .priv_size = sizeof(MixContext),
337  .priv_class = &mix_class,
339  .outputs = outputs,
340  .init = init,
341  .uninit = uninit,
342  .activate = activate,
344 };
345 
346 #endif /* CONFIG_MIX_FILTER */
347 
348 #if CONFIG_TMIX_FILTER
349 static int tmix_filter_frame(AVFilterLink *inlink, AVFrame *in)
350 {
351  AVFilterContext *ctx = inlink->dst;
352  AVFilterLink *outlink = ctx->outputs[0];
353  MixContext *s = ctx->priv;
354  ThreadData td;
355  AVFrame *out;
356 
357  if (s->nb_inputs == 1)
358  return ff_filter_frame(outlink, in);
359 
360  if (s->nb_frames < s->nb_inputs) {
361  s->frames[s->nb_frames] = in;
362  s->nb_frames++;
363  if (s->nb_frames < s->nb_inputs)
364  return 0;
365  } else {
366  av_frame_free(&s->frames[0]);
367  memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1));
368  s->frames[s->nb_inputs - 1] = in;
369  }
370 
371  if (ctx->is_disabled) {
372  out = av_frame_clone(s->frames[0]);
373  if (!out)
374  return AVERROR(ENOMEM);
375  return ff_filter_frame(outlink, out);
376  }
377 
378  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
379  if (!out)
380  return AVERROR(ENOMEM);
381  out->pts = s->frames[0]->pts;
382 
383  td.out = out;
384  td.in = s->frames;
385  ctx->internal->execute(ctx, mix_frames, &td, NULL, FFMIN(s->height[0], ff_filter_get_nb_threads(ctx)));
386 
387  return ff_filter_frame(outlink, out);
388 }
389 
390 static const AVOption tmix_options[] = {
391  { "frames", "set number of successive frames to mix", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=3}, 1, 128, .flags = FLAGS },
392  { "weights", "set weight for each frame", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1 1"}, 0, 0, .flags = FLAGS },
393  { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = FLAGS },
394  { NULL },
395 };
396 
397 static const AVFilterPad inputs[] = {
398  {
399  .name = "default",
400  .type = AVMEDIA_TYPE_VIDEO,
401  .filter_frame = tmix_filter_frame,
402  },
403  { NULL }
404 };
405 
407 
409  .name = "tmix",
410  .description = NULL_IF_CONFIG_SMALL("Mix successive video frames."),
411  .priv_size = sizeof(MixContext),
412  .priv_class = &tmix_class,
414  .outputs = outputs,
415  .inputs = inputs,
416  .init = init,
417  .uninit = uninit,
419 };
420 
421 #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:494
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:308
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 FLAGS
Definition: vf_mix.c:308
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:386
int64_t pts
Timestamp of the current event.
Definition: framesync.h:167
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_mix.c:283
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:301
AVFilterContext * parent
Parent filter context.
Definition: framesync.h:152
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:347
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1091
static int mix_frames(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_mix.c:135
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:401
FFFrameSyncIn * in
Pointer to array of inputs.
Definition: framesync.h:203
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:254
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:346
#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:153
static int config_output(AVFilterLink *outlink)
Definition: vf_mix.c:219
void * priv
private data for use by the filter
Definition: avfilter.h:354
#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_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:333
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
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
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:800
unsigned nb_inputs
number of input pads
Definition: avfilter.h:348
#define FFMIN(a, b)
Definition: common.h:96
#define width
static int process_frame(FFFrameSync *fs)
Definition: vf_mix.c:192
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:553
static int mix(int c0, int c1)
Definition: 4xm.c:714
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:339
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:307
#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:351
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:300
#define flags(name, subs,...)
Definition: cbs_av1.c:560
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:379
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:322
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:174
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2039
Completely stop all streams with this one.
Definition: framesync.h:65
static av_cold int init(AVFilterContext *ctx)
Definition: vf_mix.c:73
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:339
FILE * out
Definition: movenc.c:54
#define av_freep(p)
static const AVOption mix_options[]
Definition: vf_mix.c:310
static const AVFilterPad outputs[]
Definition: vf_mix.c:321
AVFrame * in
Definition: af_afftdn.c:1083
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 double val(void *priv, double ch)
Definition: aeval.c:76
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:342
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