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/pixdesc.h"
25 
26 #include "avfilter.h"
27 #include "formats.h"
28 #include "internal.h"
29 #include "framesync.h"
30 #include "video.h"
31 
32 typedef struct StackItem {
33  int x[4], y[4];
34  int linesize[4];
35  int height[4];
36 } StackItem;
37 
38 typedef struct StackContext {
39  const AVClass *class;
41  int nb_inputs;
42  char *layout;
43  int shortest;
46  int nb_planes;
47 
51 } StackContext;
52 
54 {
56  int fmt, ret;
57 
58  for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
60  if (!(desc->flags & AV_PIX_FMT_FLAG_PAL ||
63  (ret = ff_add_format(&pix_fmts, fmt)) < 0)
64  return ret;
65  }
66 
67  return ff_set_common_formats(ctx, pix_fmts);
68 }
69 
71 {
72  StackContext *s = ctx->priv;
73  int i, ret;
74 
75  if (!strcmp(ctx->filter->name, "vstack"))
76  s->is_vertical = 1;
77 
78  if (!strcmp(ctx->filter->name, "hstack"))
79  s->is_horizontal = 1;
80 
81  s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
82  if (!s->frames)
83  return AVERROR(ENOMEM);
84 
85  s->items = av_calloc(s->nb_inputs, sizeof(*s->items));
86  if (!s->items)
87  return AVERROR(ENOMEM);
88 
89  if (!strcmp(ctx->filter->name, "xstack")) {
90  if (!s->layout) {
91  if (s->nb_inputs == 2) {
92  s->layout = av_strdup("0_0|w0_0");
93  if (!s->layout)
94  return AVERROR(ENOMEM);
95  } else {
96  av_log(ctx, AV_LOG_ERROR, "No layout specified.\n");
97  return AVERROR(EINVAL);
98  }
99  }
100  }
101 
102  for (i = 0; i < s->nb_inputs; i++) {
103  AVFilterPad pad = { 0 };
104 
105  pad.type = AVMEDIA_TYPE_VIDEO;
106  pad.name = av_asprintf("input%d", i);
107  if (!pad.name)
108  return AVERROR(ENOMEM);
109 
110  if ((ret = ff_insert_inpad(ctx, i, &pad)) < 0) {
111  av_freep(&pad.name);
112  return ret;
113  }
114  }
115 
116  return 0;
117 }
118 
119 static int process_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
120 {
121  StackContext *s = ctx->priv;
122  AVFrame *out = arg;
123  AVFrame **in = s->frames;
124  const int start = (s->nb_inputs * job ) / nb_jobs;
125  const int end = (s->nb_inputs * (job+1)) / nb_jobs;
126 
127  for (int i = start; i < end; i++) {
128  StackItem *item = &s->items[i];
129 
130  for (int p = 0; p < s->nb_planes; p++) {
131  av_image_copy_plane(out->data[p] + out->linesize[p] * item->y[p] + item->x[p],
132  out->linesize[p],
133  in[i]->data[p],
134  in[i]->linesize[p],
135  item->linesize[p], item->height[p]);
136  }
137  }
138 
139  return 0;
140 }
141 
143 {
144  AVFilterContext *ctx = fs->parent;
145  AVFilterLink *outlink = ctx->outputs[0];
146  StackContext *s = fs->opaque;
147  AVFrame **in = s->frames;
148  AVFrame *out;
149  int i, ret;
150 
151  for (i = 0; i < s->nb_inputs; i++) {
152  if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
153  return ret;
154  }
155 
156  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
157  if (!out)
158  return AVERROR(ENOMEM);
159  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
161 
163 
164  return ff_filter_frame(outlink, out);
165 }
166 
167 static int config_output(AVFilterLink *outlink)
168 {
169  AVFilterContext *ctx = outlink->src;
170  StackContext *s = ctx->priv;
171  AVRational frame_rate = ctx->inputs[0]->frame_rate;
172  AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
173  int height = ctx->inputs[0]->h;
174  int width = ctx->inputs[0]->w;
175  FFFrameSyncIn *in;
176  int i, ret;
177 
178  s->desc = av_pix_fmt_desc_get(outlink->format);
179  if (!s->desc)
180  return AVERROR_BUG;
181 
182  if (s->is_vertical) {
183  for (i = 0; i < s->nb_inputs; i++) {
184  AVFilterLink *inlink = ctx->inputs[i];
185  StackItem *item = &s->items[i];
186 
187  if (ctx->inputs[i]->w != width) {
188  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);
189  return AVERROR(EINVAL);
190  }
191 
192  if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
193  return ret;
194  }
195 
196  item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
197  item->height[0] = item->height[3] = inlink->h;
198 
199  if (i) {
200  item->y[1] = item->y[2] = AV_CEIL_RSHIFT(height, s->desc->log2_chroma_h);
201  item->y[0] = item->y[3] = height;
202 
203  height += ctx->inputs[i]->h;
204  }
205  }
206  } else if (s->is_horizontal) {
207  for (i = 0; i < s->nb_inputs; i++) {
208  AVFilterLink *inlink = ctx->inputs[i];
209  StackItem *item = &s->items[i];
210 
211  if (ctx->inputs[i]->h != height) {
212  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);
213  return AVERROR(EINVAL);
214  }
215 
216  if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
217  return ret;
218  }
219 
220  item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
221  item->height[0] = item->height[3] = inlink->h;
222 
223  if (i) {
224  if ((ret = av_image_fill_linesizes(item->x, inlink->format, width)) < 0) {
225  return ret;
226  }
227 
228  width += ctx->inputs[i]->w;
229  }
230  }
231  } else {
232  char *arg, *p = s->layout, *saveptr = NULL;
233  char *arg2, *p2, *saveptr2 = NULL;
234  char *arg3, *p3, *saveptr3 = NULL;
235  int inw, inh, size;
236 
237  for (i = 0; i < s->nb_inputs; i++) {
238  AVFilterLink *inlink = ctx->inputs[i];
239  StackItem *item = &s->items[i];
240 
241  if (!(arg = av_strtok(p, "|", &saveptr)))
242  return AVERROR(EINVAL);
243 
244  p = NULL;
245 
246  if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
247  return ret;
248  }
249 
250  item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
251  item->height[0] = item->height[3] = inlink->h;
252 
253  p2 = arg;
254  inw = inh = 0;
255 
256  for (int j = 0; j < 2; j++) {
257  if (!(arg2 = av_strtok(p2, "_", &saveptr2)))
258  return AVERROR(EINVAL);
259 
260  p2 = NULL;
261  p3 = arg2;
262  while ((arg3 = av_strtok(p3, "+", &saveptr3))) {
263  p3 = NULL;
264  if (sscanf(arg3, "w%d", &size) == 1) {
265  if (size == i || size < 0 || size >= s->nb_inputs)
266  return AVERROR(EINVAL);
267 
268  if (!j)
269  inw += ctx->inputs[size]->w;
270  else
271  inh += ctx->inputs[size]->w;
272  } else if (sscanf(arg3, "h%d", &size) == 1) {
273  if (size == i || size < 0 || size >= s->nb_inputs)
274  return AVERROR(EINVAL);
275 
276  if (!j)
277  inw += ctx->inputs[size]->h;
278  else
279  inh += ctx->inputs[size]->h;
280  } else if (sscanf(arg3, "%d", &size) == 1) {
281  if (size < 0)
282  return AVERROR(EINVAL);
283 
284  if (!j)
285  inw += size;
286  else
287  inh += size;
288  } else {
289  return AVERROR(EINVAL);
290  }
291  }
292  }
293 
294  if ((ret = av_image_fill_linesizes(item->x, inlink->format, inw)) < 0) {
295  return ret;
296  }
297 
298  item->y[1] = item->y[2] = AV_CEIL_RSHIFT(inh, s->desc->log2_chroma_h);
299  item->y[0] = item->y[3] = inh;
300 
301  width = FFMAX(width, inlink->w + inw);
302  height = FFMAX(height, inlink->h + inh);
303  }
304  }
305 
307 
308  outlink->w = width;
309  outlink->h = height;
310  outlink->frame_rate = frame_rate;
311  outlink->sample_aspect_ratio = sar;
312 
313  if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
314  return ret;
315 
316  in = s->fs.in;
317  s->fs.opaque = s;
319 
320  for (i = 0; i < s->nb_inputs; i++) {
321  AVFilterLink *inlink = ctx->inputs[i];
322 
323  in[i].time_base = inlink->time_base;
324  in[i].sync = 1;
325  in[i].before = EXT_STOP;
326  in[i].after = s->shortest ? EXT_STOP : EXT_INFINITY;
327  }
328 
329  ret = ff_framesync_configure(&s->fs);
330  outlink->time_base = s->fs.time_base;
331 
332  return ret;
333 }
334 
336 {
337  StackContext *s = ctx->priv;
338  int i;
339 
340  ff_framesync_uninit(&s->fs);
341  av_freep(&s->frames);
342  av_freep(&s->items);
343 
344  for (i = 0; i < ctx->nb_inputs; i++)
345  av_freep(&ctx->input_pads[i].name);
346 }
347 
349 {
350  StackContext *s = ctx->priv;
351  return ff_framesync_activate(&s->fs);
352 }
353 
354 #define OFFSET(x) offsetof(StackContext, x)
355 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
356 static const AVOption stack_options[] = {
357  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
358  { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
359  { NULL },
360 };
361 
362 static const AVFilterPad outputs[] = {
363  {
364  .name = "default",
365  .type = AVMEDIA_TYPE_VIDEO,
366  .config_props = config_output,
367  },
368  { NULL }
369 };
370 
371 #if CONFIG_HSTACK_FILTER
372 
373 #define hstack_options stack_options
374 AVFILTER_DEFINE_CLASS(hstack);
375 
377  .name = "hstack",
378  .description = NULL_IF_CONFIG_SMALL("Stack video inputs horizontally."),
379  .priv_size = sizeof(StackContext),
380  .priv_class = &hstack_class,
382  .outputs = outputs,
383  .init = init,
384  .uninit = uninit,
385  .activate = activate,
387 };
388 
389 #endif /* CONFIG_HSTACK_FILTER */
390 
391 #if CONFIG_VSTACK_FILTER
392 
393 #define vstack_options stack_options
394 AVFILTER_DEFINE_CLASS(vstack);
395 
397  .name = "vstack",
398  .description = NULL_IF_CONFIG_SMALL("Stack video inputs vertically."),
399  .priv_size = sizeof(StackContext),
400  .priv_class = &vstack_class,
402  .outputs = outputs,
403  .init = init,
404  .uninit = uninit,
405  .activate = activate,
407 };
408 
409 #endif /* CONFIG_VSTACK_FILTER */
410 
411 #if CONFIG_XSTACK_FILTER
412 
413 static const AVOption xstack_options[] = {
414  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
415  { "layout", "set custom layout", OFFSET(layout), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, .flags = FLAGS },
416  { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
417  { NULL },
418 };
419 
420 AVFILTER_DEFINE_CLASS(xstack);
421 
423  .name = "xstack",
424  .description = NULL_IF_CONFIG_SMALL("Stack video inputs into custom layout."),
425  .priv_size = sizeof(StackContext),
426  .priv_class = &xstack_class,
428  .outputs = outputs,
429  .init = init,
430  .uninit = uninit,
431  .activate = activate,
433 };
434 
435 #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
#define NULL
Definition: coverity.c:32
#define FLAGS
Definition: vf_stack.c:355
char * layout
Definition: vf_stack.c:42
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
const char * fmt
Definition: avisynth_c.h:861
int shortest
Definition: vf_stack.c:43
misc image utilities
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2562
Main libavfilter public API header.
const char * desc
Definition: nvenc.c:68
#define AVFILTER_FLAG_DYNAMIC_INPUTS
The number of the filter inputs is not determined just by AVFilter.inputs.
Definition: avfilter.h:105
int is_horizontal
Definition: vf_stack.c:45
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
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 height[4]
Definition: vf_stack.c:35
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
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:1093
#define av_cold
Definition: attributes.h:82
static int query_formats(AVFilterContext *ctx)
Definition: vf_stack.c:53
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:259
StackItem * items
Definition: vf_stack.c:48
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:388
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_stack.c:335
FFFrameSyncIn * in
Pointer to array of inputs.
Definition: framesync.h:203
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:119
ptrdiff_t size
Definition: opengl_enc.c:100
Input stream structure.
Definition: framesync.h:81
#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
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: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:569
static int config_output(AVFilterLink *outlink)
Definition: vf_stack.c:167
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
static const AVOption stack_options[]
Definition: vf_stack.c:356
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:186
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
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:336
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
#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:802
unsigned nb_inputs
number of input pads
Definition: avfilter.h:347
AVFrame ** frames
Definition: vf_stack.c:49
#define FFMIN(a, b)
Definition: common.h:96
#define width
const AVPixFmtDescriptor * desc
Definition: vf_stack.c:40
#define OFFSET(x)
Definition: vf_stack.c:354
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:46
FFFrameSync fs
Definition: vf_stack.c:50
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
Extend the frame to infinity.
Definition: framesync.h:75
static av_cold int init(AVFilterContext *ctx)
Definition: vf_stack.c:70
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
int nb_inputs
Definition: vf_stack.c:41
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:383
#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 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
static int process_frame(FFFrameSync *fs)
Definition: vf_stack.c:142
avfilter_execute_func * execute
Definition: internal.h:155
static const AVFilterPad outputs[]
Definition: vf_stack.c:362
Completely stop all streams with this one.
Definition: framesync.h:65
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:334
int is_vertical
Definition: vf_stack.c:44
int linesize[4]
Definition: vf_stack.c:34
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:338
FILE * out
Definition: movenc.c:54
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:766
static int activate(AVFilterContext *ctx)
Definition: vf_stack.c:348
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:33
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 y[4]
Definition: vf_stack.c:33
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:341
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
#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