FFmpeg
vf_stack.c
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1 /*
2  * Copyright (c) 2015 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/opt.h"
24 #include "libavutil/parseutils.h"
25 #include "libavutil/pixdesc.h"
26 
27 #include "avfilter.h"
28 #include "drawutils.h"
29 #include "formats.h"
30 #include "internal.h"
31 #include "framesync.h"
32 #include "video.h"
33 
34 typedef struct StackItem {
35  int x[4], y[4];
36  int linesize[4];
37  int height[4];
38 } StackItem;
39 
40 typedef struct StackContext {
41  const AVClass *class;
43  int nb_inputs;
44  char *layout;
45  int shortest;
48  int nb_planes;
49  uint8_t fillcolor[4];
52 
55 
59 } StackContext;
60 
62 {
64  StackContext *s = ctx->priv;
65  int fmt, ret;
66 
67  if (s->fillcolor_enable) {
69  }
70 
71  for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
73  if (!(desc->flags & AV_PIX_FMT_FLAG_PAL ||
76  (ret = ff_add_format(&pix_fmts, fmt)) < 0)
77  return ret;
78  }
79 
80  return ff_set_common_formats(ctx, pix_fmts);
81 }
82 
84 {
85  StackContext *s = ctx->priv;
86  int i, ret;
87 
88  if (!strcmp(ctx->filter->name, "vstack"))
89  s->is_vertical = 1;
90 
91  if (!strcmp(ctx->filter->name, "hstack"))
92  s->is_horizontal = 1;
93 
94  s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
95  if (!s->frames)
96  return AVERROR(ENOMEM);
97 
98  s->items = av_calloc(s->nb_inputs, sizeof(*s->items));
99  if (!s->items)
100  return AVERROR(ENOMEM);
101 
102  if (!strcmp(ctx->filter->name, "xstack")) {
103  if (strcmp(s->fillcolor_str, "none") &&
104  av_parse_color(s->fillcolor, s->fillcolor_str, -1, ctx) >= 0) {
105  s->fillcolor_enable = 1;
106  } else {
107  s->fillcolor_enable = 0;
108  }
109  if (!s->layout) {
110  if (s->nb_inputs == 2) {
111  s->layout = av_strdup("0_0|w0_0");
112  if (!s->layout)
113  return AVERROR(ENOMEM);
114  } else {
115  av_log(ctx, AV_LOG_ERROR, "No layout specified.\n");
116  return AVERROR(EINVAL);
117  }
118  }
119  }
120 
121  for (i = 0; i < s->nb_inputs; i++) {
122  AVFilterPad pad = { 0 };
123 
124  pad.type = AVMEDIA_TYPE_VIDEO;
125  pad.name = av_asprintf("input%d", i);
126  if (!pad.name)
127  return AVERROR(ENOMEM);
128 
129  if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) {
130  av_freep(&pad.name);
131  return ret;
132  }
133  }
134 
135  return 0;
136 }
137 
138 static int process_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
139 {
140  StackContext *s = ctx->priv;
141  AVFrame *out = arg;
142  AVFrame **in = s->frames;
143  const int start = (s->nb_inputs * job ) / nb_jobs;
144  const int end = (s->nb_inputs * (job+1)) / nb_jobs;
145 
146  for (int i = start; i < end; i++) {
147  StackItem *item = &s->items[i];
148 
149  for (int p = 0; p < s->nb_planes; p++) {
150  av_image_copy_plane(out->data[p] + out->linesize[p] * item->y[p] + item->x[p],
151  out->linesize[p],
152  in[i]->data[p],
153  in[i]->linesize[p],
154  item->linesize[p], item->height[p]);
155  }
156  }
157 
158  return 0;
159 }
160 
162 {
163  AVFilterContext *ctx = fs->parent;
164  AVFilterLink *outlink = ctx->outputs[0];
165  StackContext *s = fs->opaque;
166  AVFrame **in = s->frames;
167  AVFrame *out;
168  int i, ret;
169 
170  for (i = 0; i < s->nb_inputs; i++) {
171  if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
172  return ret;
173  }
174 
175  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
176  if (!out)
177  return AVERROR(ENOMEM);
178  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
180 
181  if (s->fillcolor_enable)
182  ff_fill_rectangle(&s->draw, &s->color, out->data, out->linesize,
183  0, 0, outlink->w, outlink->h);
184 
186 
187  return ff_filter_frame(outlink, out);
188 }
189 
190 static int config_output(AVFilterLink *outlink)
191 {
192  AVFilterContext *ctx = outlink->src;
193  StackContext *s = ctx->priv;
194  AVRational frame_rate = ctx->inputs[0]->frame_rate;
195  AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
196  int height = ctx->inputs[0]->h;
197  int width = ctx->inputs[0]->w;
198  FFFrameSyncIn *in;
199  int i, ret;
200 
201  s->desc = av_pix_fmt_desc_get(outlink->format);
202  if (!s->desc)
203  return AVERROR_BUG;
204 
205  if (s->is_vertical) {
206  for (i = 0; i < s->nb_inputs; i++) {
207  AVFilterLink *inlink = ctx->inputs[i];
208  StackItem *item = &s->items[i];
209 
210  if (ctx->inputs[i]->w != width) {
211  av_log(ctx, AV_LOG_ERROR, "Input %d width %d does not match input %d width %d.\n", i, ctx->inputs[i]->w, 0, width);
212  return AVERROR(EINVAL);
213  }
214 
215  if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
216  return ret;
217  }
218 
219  item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
220  item->height[0] = item->height[3] = inlink->h;
221 
222  if (i) {
223  item->y[1] = item->y[2] = AV_CEIL_RSHIFT(height, s->desc->log2_chroma_h);
224  item->y[0] = item->y[3] = height;
225 
226  height += ctx->inputs[i]->h;
227  }
228  }
229  } else if (s->is_horizontal) {
230  for (i = 0; i < s->nb_inputs; i++) {
231  AVFilterLink *inlink = ctx->inputs[i];
232  StackItem *item = &s->items[i];
233 
234  if (ctx->inputs[i]->h != height) {
235  av_log(ctx, AV_LOG_ERROR, "Input %d height %d does not match input %d height %d.\n", i, ctx->inputs[i]->h, 0, height);
236  return AVERROR(EINVAL);
237  }
238 
239  if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
240  return ret;
241  }
242 
243  item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
244  item->height[0] = item->height[3] = inlink->h;
245 
246  if (i) {
247  if ((ret = av_image_fill_linesizes(item->x, inlink->format, width)) < 0) {
248  return ret;
249  }
250 
251  width += ctx->inputs[i]->w;
252  }
253  }
254  } else {
255  char *arg, *p = s->layout, *saveptr = NULL;
256  char *arg2, *p2, *saveptr2 = NULL;
257  char *arg3, *p3, *saveptr3 = NULL;
258  int inw, inh, size;
259 
260  if (s->fillcolor_enable) {
261  ff_draw_init(&s->draw, ctx->inputs[0]->format, 0);
262  ff_draw_color(&s->draw, &s->color, s->fillcolor);
263  }
264 
265  for (i = 0; i < s->nb_inputs; i++) {
266  AVFilterLink *inlink = ctx->inputs[i];
267  StackItem *item = &s->items[i];
268 
269  if (!(arg = av_strtok(p, "|", &saveptr)))
270  return AVERROR(EINVAL);
271 
272  p = NULL;
273 
274  if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
275  return ret;
276  }
277 
278  item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
279  item->height[0] = item->height[3] = inlink->h;
280 
281  p2 = arg;
282  inw = inh = 0;
283 
284  for (int j = 0; j < 2; j++) {
285  if (!(arg2 = av_strtok(p2, "_", &saveptr2)))
286  return AVERROR(EINVAL);
287 
288  p2 = NULL;
289  p3 = arg2;
290  while ((arg3 = av_strtok(p3, "+", &saveptr3))) {
291  p3 = NULL;
292  if (sscanf(arg3, "w%d", &size) == 1) {
293  if (size == i || size < 0 || size >= s->nb_inputs)
294  return AVERROR(EINVAL);
295 
296  if (!j)
297  inw += ctx->inputs[size]->w;
298  else
299  inh += ctx->inputs[size]->w;
300  } else if (sscanf(arg3, "h%d", &size) == 1) {
301  if (size == i || size < 0 || size >= s->nb_inputs)
302  return AVERROR(EINVAL);
303 
304  if (!j)
305  inw += ctx->inputs[size]->h;
306  else
307  inh += ctx->inputs[size]->h;
308  } else if (sscanf(arg3, "%d", &size) == 1) {
309  if (size < 0)
310  return AVERROR(EINVAL);
311 
312  if (!j)
313  inw += size;
314  else
315  inh += size;
316  } else {
317  return AVERROR(EINVAL);
318  }
319  }
320  }
321 
322  if ((ret = av_image_fill_linesizes(item->x, inlink->format, inw)) < 0) {
323  return ret;
324  }
325 
326  item->y[1] = item->y[2] = AV_CEIL_RSHIFT(inh, s->desc->log2_chroma_h);
327  item->y[0] = item->y[3] = inh;
328 
329  width = FFMAX(width, inlink->w + inw);
330  height = FFMAX(height, inlink->h + inh);
331  }
332  }
333 
335 
336  outlink->w = width;
337  outlink->h = height;
338  outlink->frame_rate = frame_rate;
339  outlink->sample_aspect_ratio = sar;
340 
341  for (i = 1; i < s->nb_inputs; i++) {
342  AVFilterLink *inlink = ctx->inputs[i];
343  if (outlink->frame_rate.num != inlink->frame_rate.num ||
344  outlink->frame_rate.den != inlink->frame_rate.den) {
345  av_log(ctx, AV_LOG_VERBOSE,
346  "Video inputs have different frame rates, output will be VFR\n");
347  outlink->frame_rate = av_make_q(1, 0);
348  break;
349  }
350  }
351 
352  if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
353  return ret;
354 
355  in = s->fs.in;
356  s->fs.opaque = s;
358 
359  for (i = 0; i < s->nb_inputs; i++) {
360  AVFilterLink *inlink = ctx->inputs[i];
361 
362  in[i].time_base = inlink->time_base;
363  in[i].sync = 1;
364  in[i].before = EXT_STOP;
365  in[i].after = s->shortest ? EXT_STOP : EXT_INFINITY;
366  }
367 
368  ret = ff_framesync_configure(&s->fs);
369  outlink->time_base = s->fs.time_base;
370 
371  return ret;
372 }
373 
375 {
376  StackContext *s = ctx->priv;
377  int i;
378 
379  ff_framesync_uninit(&s->fs);
380  av_freep(&s->frames);
381  av_freep(&s->items);
382 
383  for (i = 0; i < ctx->nb_inputs; i++)
384  av_freep(&ctx->input_pads[i].name);
385 }
386 
388 {
389  StackContext *s = ctx->priv;
390  return ff_framesync_activate(&s->fs);
391 }
392 
393 #define OFFSET(x) offsetof(StackContext, x)
394 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
395 static const AVOption stack_options[] = {
396  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
397  { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
398  { NULL },
399 };
400 
401 static const AVFilterPad outputs[] = {
402  {
403  .name = "default",
404  .type = AVMEDIA_TYPE_VIDEO,
405  .config_props = config_output,
406  },
407  { NULL }
408 };
409 
410 #if CONFIG_HSTACK_FILTER
411 
412 #define hstack_options stack_options
413 AVFILTER_DEFINE_CLASS(hstack);
414 
416  .name = "hstack",
417  .description = NULL_IF_CONFIG_SMALL("Stack video inputs horizontally."),
418  .priv_size = sizeof(StackContext),
419  .priv_class = &hstack_class,
421  .outputs = outputs,
422  .init = init,
423  .uninit = uninit,
424  .activate = activate,
426 };
427 
428 #endif /* CONFIG_HSTACK_FILTER */
429 
430 #if CONFIG_VSTACK_FILTER
431 
432 #define vstack_options stack_options
433 AVFILTER_DEFINE_CLASS(vstack);
434 
436  .name = "vstack",
437  .description = NULL_IF_CONFIG_SMALL("Stack video inputs vertically."),
438  .priv_size = sizeof(StackContext),
439  .priv_class = &vstack_class,
441  .outputs = outputs,
442  .init = init,
443  .uninit = uninit,
444  .activate = activate,
446 };
447 
448 #endif /* CONFIG_VSTACK_FILTER */
449 
450 #if CONFIG_XSTACK_FILTER
451 
452 static const AVOption xstack_options[] = {
453  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
454  { "layout", "set custom layout", OFFSET(layout), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, .flags = FLAGS },
455  { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
456  { "fill", "set the color for unused pixels", OFFSET(fillcolor_str), AV_OPT_TYPE_STRING, {.str = "none"}, .flags = FLAGS },
457  { NULL },
458 };
459 
460 AVFILTER_DEFINE_CLASS(xstack);
461 
463  .name = "xstack",
464  .description = NULL_IF_CONFIG_SMALL("Stack video inputs into custom layout."),
465  .priv_size = sizeof(StackContext),
466  .priv_class = &xstack_class,
468  .outputs = outputs,
469  .init = init,
470  .uninit = uninit,
471  .activate = activate,
473 };
474 
475 #endif /* CONFIG_XSTACK_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
AVFilterFormats * ff_draw_supported_pixel_formats(unsigned flags)
Return the list of pixel formats supported by the draw functions.
Definition: drawutils.c:731
#define NULL
Definition: coverity.c:32
#define FLAGS
Definition: vf_stack.c:394
char * layout
Definition: vf_stack.c:44
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
int shortest
Definition: vf_stack.c:45
const char * desc
Definition: libsvtav1.c:79
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
int num
Numerator.
Definition: rational.h:59
int is_horizontal
Definition: vf_stack.c:47
AVFilter ff_vf_hstack
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:124
uint8_t fillcolor[4]
Definition: vf_stack.c:49
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
int64_t pts
Timestamp of the current event.
Definition: framesync.h:167
int fillcolor_enable
Definition: vf_stack.c:51
int height[4]
Definition: vf_stack.c:37
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
const char * name
Pad name.
Definition: internal.h:60
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:1091
uint8_t
#define av_cold
Definition: attributes.h:88
static int query_formats(AVFilterContext *ctx)
Definition: vf_stack.c:61
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:259
StackItem * items
Definition: vf_stack.c:56
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:92
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:401
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_stack.c:374
FFFrameSyncIn * in
Pointer to array of inputs.
Definition: framesync.h:203
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
enum FFFrameSyncExtMode after
Extrapolation mode for timestamps after the last frame.
Definition: framesync.h:91
static int process_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
Definition: vf_stack.c:138
ptrdiff_t size
Definition: opengl_enc.c:100
Input stream structure.
Definition: framesync.h:81
#define av_log(a,...)
int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen, void *log_ctx)
Put the RGBA values that correspond to color_string in rgba_color.
Definition: parseutils.c:354
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
AVFilter ff_vf_xstack
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
static int config_output(AVFilterLink *outlink)
Definition: vf_stack.c:190
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
static const AVOption stack_options[]
Definition: vf_stack.c:395
Frame sync structure.
Definition: framesync.h:146
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
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
void ff_draw_color(FFDrawContext *draw, FFDrawColor *color, const uint8_t rgba[4])
Prepare a color.
Definition: drawutils.c:231
AVFilter ff_vf_vstack
#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
#define FFMAX(a, b)
Definition: common.h:94
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
uint64_t flags
Combination of AV_PIX_FMT_FLAG_...
Definition: pixdesc.h:106
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:350
AVFrame ** frames
Definition: vf_stack.c:57
#define FFMIN(a, b)
Definition: common.h:96
#define width
const AVPixFmtDescriptor * desc
Definition: vf_stack.c:42
#define OFFSET(x)
Definition: vf_stack.c:393
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
void * opaque
Opaque pointer, not used by the API.
Definition: framesync.h:177
int nb_planes
Definition: vf_stack.c:48
FFFrameSync fs
Definition: vf_stack.c:58
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
Extend the frame to infinity.
Definition: framesync.h:75
misc drawing utilities
static av_cold int init(AVFilterContext *ctx)
Definition: vf_stack.c:83
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
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
int nb_inputs
Definition: vf_stack.c:43
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:396
#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
int ff_draw_init(FFDrawContext *draw, enum AVPixelFormat format, unsigned flags)
Init a draw context.
Definition: drawutils.c:178
misc parsing utilities
#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
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:381
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
FFDrawColor color
Definition: vf_stack.c:54
static int process_frame(FFFrameSync *fs)
Definition: vf_stack.c:161
int den
Denominator.
Definition: rational.h:60
avfilter_execute_func * execute
Definition: internal.h:136
static const AVFilterPad outputs[]
Definition: vf_stack.c:401
Completely stop all streams with this one.
Definition: framesync.h:65
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:288
int is_vertical
Definition: vf_stack.c:46
int linesize[4]
Definition: vf_stack.c:36
A list of supported formats for one end of a filter link.
Definition: formats.h:65
void ff_fill_rectangle(FFDrawContext *draw, FFDrawColor *color, uint8_t *dst[], int dst_linesize[], int dst_x, int dst_y, int w, int h)
Fill a rectangle with an uniform color.
Definition: drawutils.c:318
An instance of a filter.
Definition: avfilter.h:341
char * fillcolor_str
Definition: vf_stack.c:50
FILE * out
Definition: movenc.c:54
#define av_freep(p)
static int activate(AVFilterContext *ctx)
Definition: vf_stack.c:387
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:373
int x[4]
Definition: vf_stack.c:35
FFDrawContext draw
Definition: vf_stack.c:53
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 y[4]
Definition: vf_stack.c:35
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:344
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 layout
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