FFmpeg  4.3.8
vf_stack.c
Go to the documentation of this file.
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
int size
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2549
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
AVOption.
Definition: opt.h:246
int shortest
Definition: vf_stack.c:45
misc image utilities
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2589
Main libavfilter public API header.
const char * desc
Definition: nvenc.c:79
#define AVFILTER_FLAG_DYNAMIC_INPUTS
The number of the filter inputs is not determined just by AVFilter.inputs.
Definition: avfilter.h:105
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:117
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:104
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:346
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1075
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:393
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:192
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
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:345
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#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:605
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:283
static const AVOption stack_options[]
Definition: vf_stack.c:395
Frame sync structure.
Definition: framesync.h:146
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
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
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:350
int ff_framesync_activate(FFFrameSync *fs)
Examine the frames in the filter&#39;s input and try to produce output.
Definition: framesync.c:334
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:784
unsigned nb_inputs
number of input pads
Definition: avfilter.h:347
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:331
int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
Initialize a frame sync structure.
Definition: framesync.c:77
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:388
#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)\", 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
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:350
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
#define flags(name, subs,...)
Definition: cbs_av1.c:576
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:314
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
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:144
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:314
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:64
uint64_t layout
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:338
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:338
int x[4]
Definition: vf_stack.c:35
FFDrawContext draw
Definition: vf_stack.c:53
internal API functions
int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe, unsigned get)
Get the current frame in an input.
Definition: framesync.c:246
int y[4]
Definition: vf_stack.c:35
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:266