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  av_sscanf(arg, "%f", &s->weights[i]);
112  s->wfactor += s->weights[i];
113  last = i;
114  }
115  for (; i < s->nb_inputs; i++) {
116  s->weights[i] = s->weights[last];
117  s->wfactor += s->weights[i];
118  }
119  if (s->scale == 0) {
120  s->wfactor = 1 / s->wfactor;
121  } else {
122  s->wfactor = s->scale;
123  }
124 
125  return 0;
126 }
127 
128 typedef struct ThreadData {
129  AVFrame **in, *out;
130 } ThreadData;
131 
132 static int mix_frames(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
133 {
134  MixContext *s = ctx->priv;
135  ThreadData *td = arg;
136  AVFrame **in = td->in;
137  AVFrame *out = td->out;
138  int i, p, x, y;
139 
140  if (s->depth <= 8) {
141  for (p = 0; p < s->nb_planes; p++) {
142  const int slice_start = (s->height[p] * jobnr) / nb_jobs;
143  const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
144  uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
145 
146  for (y = slice_start; y < slice_end; y++) {
147  for (x = 0; x < s->linesize[p]; x++) {
148  int val = 0;
149 
150  for (i = 0; i < s->nb_inputs; i++) {
151  uint8_t src = in[i]->data[p][y * in[i]->linesize[p] + x];
152 
153  val += src * s->weights[i];
154  }
155 
156  dst[x] = av_clip_uint8(val * s->wfactor);
157  }
158 
159  dst += out->linesize[p];
160  }
161  }
162  } else {
163  for (p = 0; p < s->nb_planes; p++) {
164  const int slice_start = (s->height[p] * jobnr) / nb_jobs;
165  const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
166  uint16_t *dst = (uint16_t *)(out->data[p] + slice_start * out->linesize[p]);
167 
168  for (y = slice_start; y < slice_end; y++) {
169  for (x = 0; x < s->linesize[p] / 2; x++) {
170  int val = 0;
171 
172  for (i = 0; i < s->nb_inputs; i++) {
173  uint16_t src = AV_RN16(in[i]->data[p] + y * in[i]->linesize[p] + x * 2);
174 
175  val += src * s->weights[i];
176  }
177 
178  dst[x] = av_clip(val * s->wfactor, 0, s->max);
179  }
180 
181  dst += out->linesize[p] / 2;
182  }
183  }
184  }
185 
186  return 0;
187 }
188 
190 {
191  AVFilterContext *ctx = fs->parent;
192  AVFilterLink *outlink = ctx->outputs[0];
193  MixContext *s = fs->opaque;
194  AVFrame **in = s->frames;
195  AVFrame *out;
196  ThreadData td;
197  int i, ret;
198 
199  for (i = 0; i < s->nb_inputs; i++) {
200  if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
201  return ret;
202  }
203 
204  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
205  if (!out)
206  return AVERROR(ENOMEM);
207  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
208 
209  td.in = in;
210  td.out = out;
211  ctx->internal->execute(ctx, mix_frames, &td, NULL, FFMIN(s->height[0], ff_filter_get_nb_threads(ctx)));
212 
213  return ff_filter_frame(outlink, out);
214 }
215 
216 static int config_output(AVFilterLink *outlink)
217 {
218  AVFilterContext *ctx = outlink->src;
219  MixContext *s = ctx->priv;
220  AVRational frame_rate = ctx->inputs[0]->frame_rate;
221  AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
222  AVFilterLink *inlink = ctx->inputs[0];
223  int height = ctx->inputs[0]->h;
224  int width = ctx->inputs[0]->w;
225  FFFrameSyncIn *in;
226  int i, ret;
227 
228  if (!s->tmix) {
229  for (i = 1; i < s->nb_inputs; i++) {
230  if (ctx->inputs[i]->h != height || ctx->inputs[i]->w != width) {
231  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);
232  return AVERROR(EINVAL);
233  }
234  }
235  }
236 
237  s->desc = av_pix_fmt_desc_get(outlink->format);
238  if (!s->desc)
239  return AVERROR_BUG;
241  s->depth = s->desc->comp[0].depth;
242  s->max = (1 << s->depth) - 1;
243 
244  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
245  return ret;
246 
247  s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
248  s->height[0] = s->height[3] = inlink->h;
249 
250  if (s->tmix)
251  return 0;
252 
253  outlink->w = width;
254  outlink->h = height;
255  outlink->frame_rate = frame_rate;
256  outlink->sample_aspect_ratio = sar;
257 
258  if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
259  return ret;
260 
261  in = s->fs.in;
262  s->fs.opaque = s;
264 
265  for (i = 0; i < s->nb_inputs; i++) {
266  AVFilterLink *inlink = ctx->inputs[i];
267 
268  in[i].time_base = inlink->time_base;
269  in[i].sync = 1;
270  in[i].before = EXT_STOP;
271  in[i].after = (s->duration == 1 || (s->duration == 2 && i == 0)) ? EXT_STOP : EXT_INFINITY;
272  }
273 
274  ret = ff_framesync_configure(&s->fs);
275  outlink->time_base = s->fs.time_base;
276 
277  return ret;
278 }
279 
281 {
282  MixContext *s = ctx->priv;
283  int i;
284 
285  ff_framesync_uninit(&s->fs);
286  av_freep(&s->weights);
287 
288  if (!s->tmix) {
289  for (i = 0; i < ctx->nb_inputs; i++)
290  av_freep(&ctx->input_pads[i].name);
291  } else {
292  for (i = 0; i < s->nb_frames; i++)
293  av_frame_free(&s->frames[i]);
294  }
295  av_freep(&s->frames);
296 }
297 
299 {
300  MixContext *s = ctx->priv;
301  return ff_framesync_activate(&s->fs);
302 }
303 
304 #define OFFSET(x) offsetof(MixContext, x)
305 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
306 
307 static const AVOption mix_options[] = {
308  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
309  { "weights", "set weight for each input", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1"}, 0, 0, .flags = FLAGS },
310  { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = FLAGS },
311  { "duration", "how to determine end of stream", OFFSET(duration), AV_OPT_TYPE_INT, {.i64=0}, 0, 2, .flags = FLAGS, "duration" },
312  { "longest", "Duration of longest input", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, "duration" },
313  { "shortest", "Duration of shortest input", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, "duration" },
314  { "first", "Duration of first input", 0, AV_OPT_TYPE_CONST, {.i64=2}, 0, 0, FLAGS, "duration" },
315  { NULL },
316 };
317 
318 static const AVFilterPad outputs[] = {
319  {
320  .name = "default",
321  .type = AVMEDIA_TYPE_VIDEO,
322  .config_props = config_output,
323  },
324  { NULL }
325 };
326 
327 #if CONFIG_MIX_FILTER
329 
331  .name = "mix",
332  .description = NULL_IF_CONFIG_SMALL("Mix video inputs."),
333  .priv_size = sizeof(MixContext),
334  .priv_class = &mix_class,
336  .outputs = outputs,
337  .init = init,
338  .uninit = uninit,
339  .activate = activate,
341 };
342 
343 #endif /* CONFIG_MIX_FILTER */
344 
345 #if CONFIG_TMIX_FILTER
346 static int tmix_filter_frame(AVFilterLink *inlink, AVFrame *in)
347 {
348  AVFilterContext *ctx = inlink->dst;
349  AVFilterLink *outlink = ctx->outputs[0];
350  MixContext *s = ctx->priv;
351  ThreadData td;
352  AVFrame *out;
353 
354  if (s->nb_inputs == 1)
355  return ff_filter_frame(outlink, in);
356 
357  if (s->nb_frames < s->nb_inputs) {
358  s->frames[s->nb_frames] = in;
359  s->nb_frames++;
360  if (s->nb_frames < s->nb_inputs)
361  return 0;
362  } else {
363  av_frame_free(&s->frames[0]);
364  memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1));
365  s->frames[s->nb_inputs - 1] = in;
366  }
367 
368  if (ctx->is_disabled) {
369  out = av_frame_clone(s->frames[0]);
370  if (!out)
371  return AVERROR(ENOMEM);
372  return ff_filter_frame(outlink, out);
373  }
374 
375  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
376  if (!out)
377  return AVERROR(ENOMEM);
378  out->pts = s->frames[0]->pts;
379 
380  td.out = out;
381  td.in = s->frames;
382  ctx->internal->execute(ctx, mix_frames, &td, NULL, FFMIN(s->height[0], ff_filter_get_nb_threads(ctx)));
383 
384  return ff_filter_frame(outlink, out);
385 }
386 
387 static const AVOption tmix_options[] = {
388  { "frames", "set number of successive frames to mix", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=3}, 1, 128, .flags = FLAGS },
389  { "weights", "set weight for each frame", OFFSET(weights_str), AV_OPT_TYPE_STRING, {.str="1 1 1"}, 0, 0, .flags = FLAGS },
390  { "scale", "set scale", OFFSET(scale), AV_OPT_TYPE_FLOAT, {.dbl=0}, 0, INT16_MAX, .flags = FLAGS },
391  { NULL },
392 };
393 
394 static const AVFilterPad inputs[] = {
395  {
396  .name = "default",
397  .type = AVMEDIA_TYPE_VIDEO,
398  .filter_frame = tmix_filter_frame,
399  },
400  { NULL }
401 };
402 
404 
406  .name = "tmix",
407  .description = NULL_IF_CONFIG_SMALL("Mix successive video frames."),
408  .priv_size = sizeof(MixContext),
409  .priv_class = &tmix_class,
411  .outputs = outputs,
412  .inputs = inputs,
413  .init = init,
414  .uninit = uninit,
416 };
417 
418 #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
const char const char void * val
Definition: avisynth_c.h:863
AVFrame * out
Definition: af_adeclick.c:488
int depth
Definition: vf_mix.c:46
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2522
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
AVOption.
Definition: opt.h:246
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
const char * fmt
Definition: avisynth_c.h:861
misc image utilities
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2562
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:105
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:117
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 src
Definition: vp8dsp.c:254
#define FLAGS
Definition: vf_mix.c:305
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:385
int64_t pts
Timestamp of the current event.
Definition: framesync.h:167
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_mix.c:280
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:244
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:298
AVFilterContext * parent
Parent filter context.
Definition: framesync.h:152
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
static int mix_frames(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_mix.c:132
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
#define av_cold
Definition: attributes.h:82
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:388
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
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:345
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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:568
#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:293
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:202
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static int config_output(AVFilterLink *outlink)
Definition: vf_mix.c:216
void * priv
private data for use by the filter
Definition: avfilter.h:353
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:116
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:337
int ff_framesync_activate(FFFrameSync *fs)
Examine the frames in the filter&#39;s input and try to produce output.
Definition: framesync.c:344
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:802
unsigned nb_inputs
number of input pads
Definition: avfilter.h:347
#define FFMIN(a, b)
Definition: common.h:96
#define width
static int process_frame(FFFrameSync *fs)
Definition: vf_mix.c:189
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:710
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:64
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
Initialize a frame sync structure.
Definition: framesync.c:77
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:165
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:144
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:148
#define OFFSET(x)
Definition: vf_mix.c:304
#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:133
#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:350
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:378
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
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:184
int max
Definition: vf_mix.c:47
avfilter_execute_func * execute
Definition: internal.h:155
float * weights
custom weights for every input
Definition: af_amix.c:173
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2029
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:334
A list of supported formats for one end of a filter link.
Definition: formats.h:64
int nb_inputs
number of inputs
Definition: af_amix.c:161
AVFrame ** frames
Definition: vf_mix.c:52
An instance of a filter.
Definition: avfilter.h:338
FILE * out
Definition: movenc.c:54
#define av_freep(p)
static const AVOption mix_options[]
Definition: vf_mix.c:307
static const AVFilterPad outputs[]
Definition: vf_mix.c:318
AVFrame * in
Definition: af_afftdn.c:1082
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:256
int depth
Number of bits in the component.
Definition: pixdesc.h:58
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:341
#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:277