FFmpeg  4.2.2
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  if (!strcmp(ctx->filter->name, "xstack")) {
86  if (!s->layout) {
87  if (s->nb_inputs == 2) {
88  s->layout = av_strdup("0_0|w0_0");
89  if (!s->layout)
90  return AVERROR(ENOMEM);
91  } else {
92  av_log(ctx, AV_LOG_ERROR, "No layout specified.\n");
93  return AVERROR(EINVAL);
94  }
95  }
96 
97  s->items = av_calloc(s->nb_inputs, sizeof(*s->items));
98  if (!s->items)
99  return AVERROR(ENOMEM);
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 
120 {
121  AVFilterContext *ctx = fs->parent;
122  AVFilterLink *outlink = ctx->outputs[0];
123  StackContext *s = fs->opaque;
124  AVFrame **in = s->frames;
125  AVFrame *out;
126  int i, p, ret, offset[4] = { 0 };
127 
128  for (i = 0; i < s->nb_inputs; i++) {
129  if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
130  return ret;
131  }
132 
133  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
134  if (!out)
135  return AVERROR(ENOMEM);
136  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
138 
139  for (i = 0; i < s->nb_inputs; i++) {
140  AVFilterLink *inlink = ctx->inputs[i];
141  int linesize[4];
142  int height[4];
143 
144  if (s->is_horizontal || s->is_vertical) {
145  if ((ret = av_image_fill_linesizes(linesize, inlink->format, inlink->w)) < 0) {
146  av_frame_free(&out);
147  return ret;
148  }
149 
150  height[1] = height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
151  height[0] = height[3] = inlink->h;
152  }
153 
154  for (p = 0; p < s->nb_planes; p++) {
155  if (s->is_vertical) {
156  av_image_copy_plane(out->data[p] + offset[p] * out->linesize[p],
157  out->linesize[p],
158  in[i]->data[p],
159  in[i]->linesize[p],
160  linesize[p], height[p]);
161  offset[p] += height[p];
162  } else if (s->is_horizontal) {
163  av_image_copy_plane(out->data[p] + offset[p],
164  out->linesize[p],
165  in[i]->data[p],
166  in[i]->linesize[p],
167  linesize[p], height[p]);
168  offset[p] += linesize[p];
169  } else {
170  StackItem *item = &s->items[i];
171 
172  av_image_copy_plane(out->data[p] + out->linesize[p] * item->y[p] + item->x[p],
173  out->linesize[p],
174  in[i]->data[p],
175  in[i]->linesize[p],
176  item->linesize[p], item->height[p]);
177  }
178  }
179  }
180 
181  return ff_filter_frame(outlink, out);
182 }
183 
184 static int config_output(AVFilterLink *outlink)
185 {
186  AVFilterContext *ctx = outlink->src;
187  StackContext *s = ctx->priv;
188  AVRational frame_rate = ctx->inputs[0]->frame_rate;
189  AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
190  int height = ctx->inputs[0]->h;
191  int width = ctx->inputs[0]->w;
192  FFFrameSyncIn *in;
193  int i, ret;
194 
195  s->desc = av_pix_fmt_desc_get(outlink->format);
196  if (!s->desc)
197  return AVERROR_BUG;
198 
199  if (s->is_vertical) {
200  for (i = 1; i < s->nb_inputs; i++) {
201  if (ctx->inputs[i]->w != width) {
202  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);
203  return AVERROR(EINVAL);
204  }
205  height += ctx->inputs[i]->h;
206  }
207  } else if (s->is_horizontal) {
208  for (i = 1; i < s->nb_inputs; i++) {
209  if (ctx->inputs[i]->h != height) {
210  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);
211  return AVERROR(EINVAL);
212  }
213  width += ctx->inputs[i]->w;
214  }
215  } else {
216  char *arg, *p = s->layout, *saveptr = NULL;
217  char *arg2, *p2, *saveptr2 = NULL;
218  char *arg3, *p3, *saveptr3 = NULL;
219  int inw, inh, size;
220 
221  for (i = 0; i < s->nb_inputs; i++) {
222  AVFilterLink *inlink = ctx->inputs[i];
223  StackItem *item = &s->items[i];
224 
225  if (!(arg = av_strtok(p, "|", &saveptr)))
226  return AVERROR(EINVAL);
227 
228  p = NULL;
229 
230  if ((ret = av_image_fill_linesizes(item->linesize, inlink->format, inlink->w)) < 0) {
231  return ret;
232  }
233 
234  item->height[1] = item->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
235  item->height[0] = item->height[3] = inlink->h;
236 
237  p2 = arg;
238  inw = inh = 0;
239 
240  for (int j = 0; j < 2; j++) {
241  if (!(arg2 = av_strtok(p2, "_", &saveptr2)))
242  return AVERROR(EINVAL);
243 
244  p2 = NULL;
245  p3 = arg2;
246  while ((arg3 = av_strtok(p3, "+", &saveptr3))) {
247  p3 = NULL;
248  if (sscanf(arg3, "w%d", &size) == 1) {
249  if (size == i || size < 0 || size >= s->nb_inputs)
250  return AVERROR(EINVAL);
251 
252  if (!j)
253  inw += ctx->inputs[size]->w;
254  else
255  inh += ctx->inputs[size]->w;
256  } else if (sscanf(arg3, "h%d", &size) == 1) {
257  if (size == i || size < 0 || size >= s->nb_inputs)
258  return AVERROR(EINVAL);
259 
260  if (!j)
261  inw += ctx->inputs[size]->h;
262  else
263  inh += ctx->inputs[size]->h;
264  } else if (sscanf(arg3, "%d", &size) == 1) {
265  if (size < 0)
266  return AVERROR(EINVAL);
267 
268  if (!j)
269  inw += size;
270  else
271  inh += size;
272  } else {
273  return AVERROR(EINVAL);
274  }
275  }
276  }
277 
278  if ((ret = av_image_fill_linesizes(item->x, inlink->format, inw)) < 0) {
279  return ret;
280  }
281 
282  item->y[1] = item->y[2] = AV_CEIL_RSHIFT(inh, s->desc->log2_chroma_h);
283  item->y[0] = item->y[3] = inh;
284 
285  width = FFMAX(width, inlink->w + inw);
286  height = FFMAX(height, inlink->h + inh);
287  }
288  }
289 
291 
292  outlink->w = width;
293  outlink->h = height;
294  outlink->frame_rate = frame_rate;
295  outlink->sample_aspect_ratio = sar;
296 
297  if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
298  return ret;
299 
300  in = s->fs.in;
301  s->fs.opaque = s;
303 
304  for (i = 0; i < s->nb_inputs; i++) {
305  AVFilterLink *inlink = ctx->inputs[i];
306 
307  in[i].time_base = inlink->time_base;
308  in[i].sync = 1;
309  in[i].before = EXT_STOP;
310  in[i].after = s->shortest ? EXT_STOP : EXT_INFINITY;
311  }
312 
313  ret = ff_framesync_configure(&s->fs);
314  outlink->time_base = s->fs.time_base;
315 
316  return ret;
317 }
318 
320 {
321  StackContext *s = ctx->priv;
322  int i;
323 
324  ff_framesync_uninit(&s->fs);
325  av_freep(&s->frames);
326  av_freep(&s->items);
327 
328  for (i = 0; i < ctx->nb_inputs; i++)
329  av_freep(&ctx->input_pads[i].name);
330 }
331 
333 {
334  StackContext *s = ctx->priv;
335  return ff_framesync_activate(&s->fs);
336 }
337 
338 #define OFFSET(x) offsetof(StackContext, x)
339 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
340 static const AVOption stack_options[] = {
341  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
342  { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
343  { NULL },
344 };
345 
346 static const AVFilterPad outputs[] = {
347  {
348  .name = "default",
349  .type = AVMEDIA_TYPE_VIDEO,
350  .config_props = config_output,
351  },
352  { NULL }
353 };
354 
355 #if CONFIG_HSTACK_FILTER
356 
357 #define hstack_options stack_options
358 AVFILTER_DEFINE_CLASS(hstack);
359 
361  .name = "hstack",
362  .description = NULL_IF_CONFIG_SMALL("Stack video inputs horizontally."),
363  .priv_size = sizeof(StackContext),
364  .priv_class = &hstack_class,
366  .outputs = outputs,
367  .init = init,
368  .uninit = uninit,
369  .activate = activate,
371 };
372 
373 #endif /* CONFIG_HSTACK_FILTER */
374 
375 #if CONFIG_VSTACK_FILTER
376 
377 #define vstack_options stack_options
378 AVFILTER_DEFINE_CLASS(vstack);
379 
381  .name = "vstack",
382  .description = NULL_IF_CONFIG_SMALL("Stack video inputs vertically."),
383  .priv_size = sizeof(StackContext),
384  .priv_class = &vstack_class,
386  .outputs = outputs,
387  .init = init,
388  .uninit = uninit,
389  .activate = activate,
391 };
392 
393 #endif /* CONFIG_VSTACK_FILTER */
394 
395 #if CONFIG_XSTACK_FILTER
396 
397 static const AVOption xstack_options[] = {
398  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
399  { "layout", "set custom layout", OFFSET(layout), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, .flags = FLAGS },
400  { "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
401  { NULL },
402 };
403 
404 AVFILTER_DEFINE_CLASS(xstack);
405 
407  .name = "xstack",
408  .description = NULL_IF_CONFIG_SMALL("Stack video inputs into custom layout."),
409  .priv_size = sizeof(StackContext),
410  .priv_class = &xstack_class,
412  .outputs = outputs,
413  .init = init,
414  .uninit = uninit,
415  .activate = activate,
417 };
418 
419 #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:339
char * layout
Definition: vf_stack.c:42
int size
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:1080
#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.
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:319
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
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:568
static int config_output(AVFilterLink *outlink)
Definition: vf_stack.c:184
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:340
Frame sync structure.
Definition: framesync.h:146
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
void * priv
private data for use by the filter
Definition: avfilter.h:353
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:337
int ff_framesync_activate(FFFrameSync *fs)
Examine the frames in the filter&#39;s input and try to produce output.
Definition: framesync.c:344
int(* on_event)(struct FFFrameSync *fs)
Callback called when a frame event is ready.
Definition: framesync.h:172
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
#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
unsigned nb_inputs
number of input pads
Definition: avfilter.h:347
AVFrame ** frames
Definition: vf_stack.c:49
#define width
const AVPixFmtDescriptor * desc
Definition: vf_stack.c:40
#define OFFSET(x)
Definition: vf_stack.c:338
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)\", 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
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
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:119
static const AVFilterPad outputs[]
Definition: vf_stack.c:346
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
uint64_t layout
An instance of a filter.
Definition: avfilter.h:338
FILE * out
Definition: movenc.c:54
#define av_freep(p)
static int activate(AVFilterContext *ctx)
Definition: vf_stack.c:332
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
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
#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