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 ret;
66 
67  if (s->fillcolor_enable) {
69  }
70 
71  ret = ff_formats_pixdesc_filter(&formats, 0,
75  if (ret < 0)
76  return ret;
77  return ff_set_common_formats(ctx, formats);
78 }
79 
81 {
82  StackContext *s = ctx->priv;
83  int i, ret;
84 
85  if (!strcmp(ctx->filter->name, "vstack"))
86  s->is_vertical = 1;
87 
88  if (!strcmp(ctx->filter->name, "hstack"))
89  s->is_horizontal = 1;
90 
91  s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
92  if (!s->frames)
93  return AVERROR(ENOMEM);
94 
95  s->items = av_calloc(s->nb_inputs, sizeof(*s->items));
96  if (!s->items)
97  return AVERROR(ENOMEM);
98 
99  if (!strcmp(ctx->filter->name, "xstack")) {
100  if (strcmp(s->fillcolor_str, "none") &&
101  av_parse_color(s->fillcolor, s->fillcolor_str, -1, ctx) >= 0) {
102  s->fillcolor_enable = 1;
103  } else {
104  s->fillcolor_enable = 0;
105  }
106  if (!s->layout) {
107  if (s->nb_inputs == 2) {
108  s->layout = av_strdup("0_0|w0_0");
109  if (!s->layout)
110  return AVERROR(ENOMEM);
111  } else {
112  av_log(ctx, AV_LOG_ERROR, "No layout specified.\n");
113  return AVERROR(EINVAL);
114  }
115  }
116  }
117 
118  for (i = 0; i < s->nb_inputs; i++) {
119  AVFilterPad pad = { 0 };
120 
121  pad.type = AVMEDIA_TYPE_VIDEO;
122  pad.name = av_asprintf("input%d", i);
123  if (!pad.name)
124  return AVERROR(ENOMEM);
125 
126  if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) {
127  av_freep(&pad.name);
128  return ret;
129  }
130  }
131 
132  return 0;
133 }
134 
135 static int process_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
136 {
137  StackContext *s = ctx->priv;
138  AVFrame *out = arg;
139  AVFrame **in = s->frames;
140  const int start = (s->nb_inputs * job ) / nb_jobs;
141  const int end = (s->nb_inputs * (job+1)) / nb_jobs;
142 
143  for (int i = start; i < end; i++) {
144  StackItem *item = &s->items[i];
145 
146  for (int p = 0; p < s->nb_planes; p++) {
147  av_image_copy_plane(out->data[p] + out->linesize[p] * item->y[p] + item->x[p],
148  out->linesize[p],
149  in[i]->data[p],
150  in[i]->linesize[p],
151  item->linesize[p], item->height[p]);
152  }
153  }
154 
155  return 0;
156 }
157 
159 {
160  AVFilterContext *ctx = fs->parent;
161  AVFilterLink *outlink = ctx->outputs[0];
162  StackContext *s = fs->opaque;
163  AVFrame **in = s->frames;
164  AVFrame *out;
165  int i, ret;
166 
167  for (i = 0; i < s->nb_inputs; i++) {
168  if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
169  return ret;
170  }
171 
172  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
173  if (!out)
174  return AVERROR(ENOMEM);
175  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
177 
178  if (s->fillcolor_enable)
179  ff_fill_rectangle(&s->draw, &s->color, out->data, out->linesize,
180  0, 0, outlink->w, outlink->h);
181 
183 
184  return ff_filter_frame(outlink, out);
185 }
186 
187 static int config_output(AVFilterLink *outlink)
188 {
189  AVFilterContext *ctx = outlink->src;
190  StackContext *s = ctx->priv;
191  AVRational frame_rate = ctx->inputs[0]->frame_rate;
192  AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
193  int height = ctx->inputs[0]->h;
194  int width = ctx->inputs[0]->w;
195  FFFrameSyncIn *in;
196  int i, ret;
197 
198  s->desc = av_pix_fmt_desc_get(outlink->format);
199  if (!s->desc)
200  return AVERROR_BUG;
201 
202  if (s->is_vertical) {
203  for (i = 0; i < s->nb_inputs; i++) {
204  AVFilterLink *inlink = ctx->inputs[i];
205  StackItem *item = &s->items[i];
206 
207  if (ctx->inputs[i]->w != width) {
208  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);
209  return AVERROR(EINVAL);
210  }
211 
212  if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
213  return ret;
214  }
215 
216  item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
217  item->height[0] = item->height[3] = inlink->h;
218 
219  if (i) {
220  item->y[1] = item->y[2] = AV_CEIL_RSHIFT(height, s->desc->log2_chroma_h);
221  item->y[0] = item->y[3] = height;
222 
223  height += ctx->inputs[i]->h;
224  }
225  }
226  } else if (s->is_horizontal) {
227  for (i = 0; i < s->nb_inputs; i++) {
228  AVFilterLink *inlink = ctx->inputs[i];
229  StackItem *item = &s->items[i];
230 
231  if (ctx->inputs[i]->h != height) {
232  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);
233  return AVERROR(EINVAL);
234  }
235 
236  if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
237  return ret;
238  }
239 
240  item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
241  item->height[0] = item->height[3] = inlink->h;
242 
243  if (i) {
244  if ((ret = av_image_fill_linesizes(item->x, inlink->format, width)) < 0) {
245  return ret;
246  }
247 
248  width += ctx->inputs[i]->w;
249  }
250  }
251  } else {
252  char *arg, *p = s->layout, *saveptr = NULL;
253  char *arg2, *p2, *saveptr2 = NULL;
254  char *arg3, *p3, *saveptr3 = NULL;
255  int inw, inh, size;
256 
257  if (s->fillcolor_enable) {
258  ff_draw_init(&s->draw, ctx->inputs[0]->format, 0);
259  ff_draw_color(&s->draw, &s->color, s->fillcolor);
260  }
261 
262  for (i = 0; i < s->nb_inputs; i++) {
263  AVFilterLink *inlink = ctx->inputs[i];
264  StackItem *item = &s->items[i];
265 
266  if (!(arg = av_strtok(p, "|", &saveptr)))
267  return AVERROR(EINVAL);
268 
269  p = NULL;
270 
271  if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
272  return ret;
273  }
274 
275  item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
276  item->height[0] = item->height[3] = inlink->h;
277 
278  p2 = arg;
279  inw = inh = 0;
280 
281  for (int j = 0; j < 2; j++) {
282  if (!(arg2 = av_strtok(p2, "_", &saveptr2)))
283  return AVERROR(EINVAL);
284 
285  p2 = NULL;
286  p3 = arg2;
287  while ((arg3 = av_strtok(p3, "+", &saveptr3))) {
288  p3 = NULL;
289  if (sscanf(arg3, "w%d", &size) == 1) {
290  if (size == i || size < 0 || size >= s->nb_inputs)
291  return AVERROR(EINVAL);
292 
293  if (!j)
294  inw += ctx->inputs[size]->w;
295  else
296  inh += ctx->inputs[size]->w;
297  } else if (sscanf(arg3, "h%d", &size) == 1) {
298  if (size == i || size < 0 || size >= s->nb_inputs)
299  return AVERROR(EINVAL);
300 
301  if (!j)
302  inw += ctx->inputs[size]->h;
303  else
304  inh += ctx->inputs[size]->h;
305  } else if (sscanf(arg3, "%d", &size) == 1) {
306  if (size < 0)
307  return AVERROR(EINVAL);
308 
309  if (!j)
310  inw += size;
311  else
312  inh += size;
313  } else {
314  return AVERROR(EINVAL);
315  }
316  }
317  }
318 
319  if ((ret = av_image_fill_linesizes(item->x, inlink->format, inw)) < 0) {
320  return ret;
321  }
322 
323  item->y[1] = item->y[2] = AV_CEIL_RSHIFT(inh, s->desc->log2_chroma_h);
324  item->y[0] = item->y[3] = inh;
325 
326  width = FFMAX(width, inlink->w + inw);
327  height = FFMAX(height, inlink->h + inh);
328  }
329  }
330 
332 
333  outlink->w = width;
334  outlink->h = height;
335  outlink->frame_rate = frame_rate;
336  outlink->sample_aspect_ratio = sar;
337 
338  for (i = 1; i < s->nb_inputs; i++) {
339  AVFilterLink *inlink = ctx->inputs[i];
340  if (outlink->frame_rate.num != inlink->frame_rate.num ||
341  outlink->frame_rate.den != inlink->frame_rate.den) {
342  av_log(ctx, AV_LOG_VERBOSE,
343  "Video inputs have different frame rates, output will be VFR\n");
344  outlink->frame_rate = av_make_q(1, 0);
345  break;
346  }
347  }
348 
349  if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
350  return ret;
351 
352  in = s->fs.in;
353  s->fs.opaque = s;
355 
356  for (i = 0; i < s->nb_inputs; i++) {
357  AVFilterLink *inlink = ctx->inputs[i];
358 
359  in[i].time_base = inlink->time_base;
360  in[i].sync = 1;
361  in[i].before = EXT_STOP;
362  in[i].after = s->shortest ? EXT_STOP : EXT_INFINITY;
363  }
364 
365  ret = ff_framesync_configure(&s->fs);
366  outlink->time_base = s->fs.time_base;
367 
368  return ret;
369 }
370 
372 {
373  StackContext *s = ctx->priv;
374  int i;
375 
376  ff_framesync_uninit(&s->fs);
377  av_freep(&s->frames);
378  av_freep(&s->items);
379 
380  for (i = 0; i < ctx->nb_inputs; i++)
381  av_freep(&ctx->input_pads[i].name);
382 }
383 
385 {
386  StackContext *s = ctx->priv;
387  return ff_framesync_activate(&s->fs);
388 }
389 
390 #define OFFSET(x) offsetof(StackContext, x)
391 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
392 static const AVOption stack_options[] = {
393  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
394  { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
395  { NULL },
396 };
397 
398 static const AVFilterPad outputs[] = {
399  {
400  .name = "default",
401  .type = AVMEDIA_TYPE_VIDEO,
402  .config_props = config_output,
403  },
404  { NULL }
405 };
406 
407 #if CONFIG_HSTACK_FILTER
408 
409 #define hstack_options stack_options
410 AVFILTER_DEFINE_CLASS(hstack);
411 
413  .name = "hstack",
414  .description = NULL_IF_CONFIG_SMALL("Stack video inputs horizontally."),
415  .priv_size = sizeof(StackContext),
416  .priv_class = &hstack_class,
418  .outputs = outputs,
419  .init = init,
420  .uninit = uninit,
421  .activate = activate,
423 };
424 
425 #endif /* CONFIG_HSTACK_FILTER */
426 
427 #if CONFIG_VSTACK_FILTER
428 
429 #define vstack_options stack_options
430 AVFILTER_DEFINE_CLASS(vstack);
431 
433  .name = "vstack",
434  .description = NULL_IF_CONFIG_SMALL("Stack video inputs vertically."),
435  .priv_size = sizeof(StackContext),
436  .priv_class = &vstack_class,
438  .outputs = outputs,
439  .init = init,
440  .uninit = uninit,
441  .activate = activate,
443 };
444 
445 #endif /* CONFIG_VSTACK_FILTER */
446 
447 #if CONFIG_XSTACK_FILTER
448 
449 static const AVOption xstack_options[] = {
450  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
451  { "layout", "set custom layout", OFFSET(layout), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, .flags = FLAGS },
452  { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
453  { "fill", "set the color for unused pixels", OFFSET(fillcolor_str), AV_OPT_TYPE_STRING, {.str = "none"}, .flags = FLAGS },
454  { NULL },
455 };
456 
457 AVFILTER_DEFINE_CLASS(xstack);
458 
460  .name = "xstack",
461  .description = NULL_IF_CONFIG_SMALL("Stack video inputs into custom layout."),
462  .priv_size = sizeof(StackContext),
463  .priv_class = &xstack_class,
465  .outputs = outputs,
466  .init = init,
467  .uninit = uninit,
468  .activate = activate,
470 };
471 
472 #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:637
#define NULL
Definition: coverity.c:32
#define FLAGS
Definition: vf_stack.c:391
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:314
AVOption.
Definition: opt.h:248
int shortest
Definition: vf_stack.c:45
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:1093
int ff_formats_pixdesc_filter(AVFilterFormats **rfmts, unsigned want, unsigned rej)
Construct a formats list containing all pixel formats with certain properties.
Definition: formats.c:368
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.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:407
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_stack.c:371
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:135
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:187
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:392
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:115
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:137
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_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:103
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:801
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:105
#define width
const AVPixFmtDescriptor * desc
Definition: vf_stack.c:42
#define OFFSET(x)
Definition: vf_stack.c:390
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:80
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:345
int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
Initialize a frame sync structure.
Definition: framesync.c:84
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:402
#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:84
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
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:381
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:328
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:158
int den
Denominator.
Definition: rational.h:60
avfilter_execute_func * execute
Definition: internal.h:136
static const AVFilterPad outputs[]
Definition: vf_stack.c:398
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:224
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:384
formats
Definition: signature.h:48
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