FFmpeg
vf_framepack.c
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1 /*
2  * Copyright (c) 2013 Vittorio Giovara
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 /**
22  * @file
23  * Generate a frame packed video, by combining two views in a single surface.
24  */
25 
26 #include <string.h>
27 
28 #include "libavutil/common.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/pixdesc.h"
32 #include "libavutil/rational.h"
33 #include "libavutil/stereo3d.h"
34 
35 #include "avfilter.h"
36 #include "formats.h"
37 #include "internal.h"
38 #include "video.h"
39 
40 #define LEFT 0
41 #define RIGHT 1
42 
43 typedef struct FramepackContext {
44  const AVClass *class;
45 
46  const AVPixFmtDescriptor *pix_desc; ///< agreed pixel format
47 
48  enum AVStereo3DType format; ///< frame pack type output
49 
50  AVFrame *input_views[2]; ///< input frames
51 
52  int64_t double_pts; ///< new pts for frameseq mode
53 } FramepackContext;
54 
55 static const enum AVPixelFormat formats_supported[] = {
56  AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV444P,
57  AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVJ420P,
58  AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
59  AV_PIX_FMT_NONE
60 };
61 
62 static int query_formats(AVFilterContext *ctx)
63 {
64  // this will ensure that formats are the same on all pads
65  AVFilterFormats *fmts_list = ff_make_format_list(formats_supported);
66  if (!fmts_list)
67  return AVERROR(ENOMEM);
68  return ff_set_common_formats(ctx, fmts_list);
69 }
70 
71 static av_cold void framepack_uninit(AVFilterContext *ctx)
72 {
73  FramepackContext *s = ctx->priv;
74 
75  // clean any leftover frame
76  av_frame_free(&s->input_views[LEFT]);
77  av_frame_free(&s->input_views[RIGHT]);
78 }
79 
80 static int config_output(AVFilterLink *outlink)
81 {
82  AVFilterContext *ctx = outlink->src;
83  FramepackContext *s = outlink->src->priv;
84 
85  int width = ctx->inputs[LEFT]->w;
86  int height = ctx->inputs[LEFT]->h;
87  AVRational time_base = ctx->inputs[LEFT]->time_base;
88  AVRational frame_rate = ctx->inputs[LEFT]->frame_rate;
89 
90  // check size and fps match on the other input
91  if (width != ctx->inputs[RIGHT]->w ||
92  height != ctx->inputs[RIGHT]->h) {
93  av_log(ctx, AV_LOG_ERROR,
94  "Left and right sizes differ (%dx%d vs %dx%d).\n",
95  width, height,
96  ctx->inputs[RIGHT]->w, ctx->inputs[RIGHT]->h);
97  return AVERROR_INVALIDDATA;
98  } else if (av_cmp_q(time_base, ctx->inputs[RIGHT]->time_base) != 0) {
99  av_log(ctx, AV_LOG_ERROR,
100  "Left and right time bases differ (%d/%d vs %d/%d).\n",
101  time_base.num, time_base.den,
102  ctx->inputs[RIGHT]->time_base.num,
103  ctx->inputs[RIGHT]->time_base.den);
104  return AVERROR_INVALIDDATA;
105  } else if (av_cmp_q(frame_rate, ctx->inputs[RIGHT]->frame_rate) != 0) {
106  av_log(ctx, AV_LOG_ERROR,
107  "Left and right framerates differ (%d/%d vs %d/%d).\n",
108  frame_rate.num, frame_rate.den,
109  ctx->inputs[RIGHT]->frame_rate.num,
110  ctx->inputs[RIGHT]->frame_rate.den);
111  return AVERROR_INVALIDDATA;
112  }
113 
114  s->pix_desc = av_pix_fmt_desc_get(outlink->format);
115  if (!s->pix_desc)
116  return AVERROR_BUG;
117 
118  // modify output properties as needed
119  switch (s->format) {
120  case AV_STEREO3D_FRAMESEQUENCE:
121  time_base.den *= 2;
122  frame_rate.num *= 2;
123 
124  s->double_pts = AV_NOPTS_VALUE;
125  break;
126  case AV_STEREO3D_COLUMNS:
127  case AV_STEREO3D_SIDEBYSIDE:
128  width *= 2;
129  break;
130  case AV_STEREO3D_LINES:
131  case AV_STEREO3D_TOPBOTTOM:
132  height *= 2;
133  break;
134  default:
135  av_log(ctx, AV_LOG_ERROR, "Unknown packing mode.");
136  return AVERROR_INVALIDDATA;
137  }
138 
139  outlink->w = width;
140  outlink->h = height;
141  outlink->time_base = time_base;
142  outlink->frame_rate = frame_rate;
143 
144  return 0;
145 }
146 
147 static void horizontal_frame_pack(AVFilterLink *outlink,
148  AVFrame *out,
149  int interleaved)
150 {
151  AVFilterContext *ctx = outlink->src;
152  FramepackContext *s = ctx->priv;
153  int i, plane;
154 
155  if (interleaved) {
156  const uint8_t *leftp = s->input_views[LEFT]->data[0];
157  const uint8_t *rightp = s->input_views[RIGHT]->data[0];
158  uint8_t *dstp = out->data[0];
159  int length = out->width / 2;
160  int lines = out->height;
161 
162  for (plane = 0; plane < s->pix_desc->nb_components; plane++) {
163  if (plane == 1 || plane == 2) {
164  length = AV_CEIL_RSHIFT(out->width / 2, s->pix_desc->log2_chroma_w);
165  lines = AV_CEIL_RSHIFT(out->height, s->pix_desc->log2_chroma_h);
166  }
167  for (i = 0; i < lines; i++) {
168  int j;
169  leftp = s->input_views[LEFT]->data[plane] +
170  s->input_views[LEFT]->linesize[plane] * i;
171  rightp = s->input_views[RIGHT]->data[plane] +
172  s->input_views[RIGHT]->linesize[plane] * i;
173  dstp = out->data[plane] + out->linesize[plane] * i;
174  for (j = 0; j < length; j++) {
175  // interpolate chroma as necessary
176  if ((s->pix_desc->log2_chroma_w ||
177  s->pix_desc->log2_chroma_h) &&
178  (plane == 1 || plane == 2)) {
179  *dstp++ = (*leftp + *rightp) / 2;
180  *dstp++ = (*leftp + *rightp) / 2;
181  } else {
182  *dstp++ = *leftp;
183  *dstp++ = *rightp;
184  }
185  leftp += 1;
186  rightp += 1;
187  }
188  }
189  }
190  } else {
191  for (i = 0; i < 2; i++) {
192  const uint8_t *src[4];
193  uint8_t *dst[4];
194  int sub_w = s->input_views[i]->width >> s->pix_desc->log2_chroma_w;
195 
196  src[0] = s->input_views[i]->data[0];
197  src[1] = s->input_views[i]->data[1];
198  src[2] = s->input_views[i]->data[2];
199 
200  dst[0] = out->data[0] + i * s->input_views[i]->width;
201  dst[1] = out->data[1] + i * sub_w;
202  dst[2] = out->data[2] + i * sub_w;
203 
204  av_image_copy(dst, out->linesize, src, s->input_views[i]->linesize,
205  s->input_views[i]->format,
206  s->input_views[i]->width,
207  s->input_views[i]->height);
208  }
209  }
210 }
211 
212 static void vertical_frame_pack(AVFilterLink *outlink,
213  AVFrame *out,
214  int interleaved)
215 {
216  AVFilterContext *ctx = outlink->src;
217  FramepackContext *s = ctx->priv;
218  int i;
219 
220  for (i = 0; i < 2; i++) {
221  const uint8_t *src[4];
222  uint8_t *dst[4];
223  int linesizes[4];
224  int sub_h = s->input_views[i]->height >> s->pix_desc->log2_chroma_h;
225 
226  src[0] = s->input_views[i]->data[0];
227  src[1] = s->input_views[i]->data[1];
228  src[2] = s->input_views[i]->data[2];
229 
230  dst[0] = out->data[0] + i * out->linesize[0] *
231  (interleaved + s->input_views[i]->height * (1 - interleaved));
232  dst[1] = out->data[1] + i * out->linesize[1] *
233  (interleaved + sub_h * (1 - interleaved));
234  dst[2] = out->data[2] + i * out->linesize[2] *
235  (interleaved + sub_h * (1 - interleaved));
236 
237  linesizes[0] = out->linesize[0] +
238  interleaved * out->linesize[0];
239  linesizes[1] = out->linesize[1] +
240  interleaved * out->linesize[1];
241  linesizes[2] = out->linesize[2] +
242  interleaved * out->linesize[2];
243 
244  av_image_copy(dst, linesizes, src, s->input_views[i]->linesize,
245  s->input_views[i]->format,
246  s->input_views[i]->width,
247  s->input_views[i]->height);
248  }
249 }
250 
251 static av_always_inline void spatial_frame_pack(AVFilterLink *outlink,
252  AVFrame *dst)
253 {
254  AVFilterContext *ctx = outlink->src;
255  FramepackContext *s = ctx->priv;
256  switch (s->format) {
257  case AV_STEREO3D_SIDEBYSIDE:
258  horizontal_frame_pack(outlink, dst, 0);
259  break;
260  case AV_STEREO3D_COLUMNS:
261  horizontal_frame_pack(outlink, dst, 1);
262  break;
263  case AV_STEREO3D_TOPBOTTOM:
264  vertical_frame_pack(outlink, dst, 0);
265  break;
266  case AV_STEREO3D_LINES:
267  vertical_frame_pack(outlink, dst, 1);
268  break;
269  }
270 }
271 
272 static int try_push_frame(AVFilterContext *ctx);
273 
274 static int filter_frame_left(AVFilterLink *inlink, AVFrame *frame)
275 {
276  FramepackContext *s = inlink->dst->priv;
277  s->input_views[LEFT] = frame;
278  return try_push_frame(inlink->dst);
279 }
280 
281 static int filter_frame_right(AVFilterLink *inlink, AVFrame *frame)
282 {
283  FramepackContext *s = inlink->dst->priv;
284  s->input_views[RIGHT] = frame;
285  return try_push_frame(inlink->dst);
286 }
287 
288 static int request_frame(AVFilterLink *outlink)
289 {
290  AVFilterContext *ctx = outlink->src;
291  FramepackContext *s = ctx->priv;
292  int ret, i;
293 
294  /* get a frame on the either input, stop as soon as a video ends */
295  for (i = 0; i < 2; i++) {
296  if (!s->input_views[i]) {
297  ret = ff_request_frame(ctx->inputs[i]);
298  if (ret < 0)
299  return ret;
300  }
301  }
302  return 0;
303 }
304 
305 static int try_push_frame(AVFilterContext *ctx)
306 {
307  FramepackContext *s = ctx->priv;
308  AVFilterLink *outlink = ctx->outputs[0];
309  AVStereo3D *stereo;
310  int ret, i;
311 
312  if (!(s->input_views[0] && s->input_views[1]))
313  return 0;
314  if (s->format == AV_STEREO3D_FRAMESEQUENCE) {
315  if (s->double_pts == AV_NOPTS_VALUE)
316  s->double_pts = s->input_views[LEFT]->pts;
317 
318  for (i = 0; i < 2; i++) {
319  // set correct timestamps
320  s->input_views[i]->pts = s->double_pts++;
321 
322  // set stereo3d side data
323  stereo = av_stereo3d_create_side_data(s->input_views[i]);
324  if (!stereo)
325  return AVERROR(ENOMEM);
326  stereo->type = s->format;
327  stereo->view = i == LEFT ? AV_STEREO3D_VIEW_LEFT
328  : AV_STEREO3D_VIEW_RIGHT;
329 
330  // filter the frame and immediately relinquish its pointer
331  ret = ff_filter_frame(outlink, s->input_views[i]);
332  s->input_views[i] = NULL;
333  if (ret < 0)
334  return ret;
335  }
336  return ret;
337  } else {
338  AVFrame *dst = ff_get_video_buffer(outlink, outlink->w, outlink->h);
339  if (!dst)
340  return AVERROR(ENOMEM);
341 
342  spatial_frame_pack(outlink, dst);
343 
344  // get any property from the original frame
345  ret = av_frame_copy_props(dst, s->input_views[LEFT]);
346  if (ret < 0) {
347  av_frame_free(&dst);
348  return ret;
349  }
350 
351  for (i = 0; i < 2; i++)
352  av_frame_free(&s->input_views[i]);
353 
354  // set stereo3d side data
355  stereo = av_stereo3d_create_side_data(dst);
356  if (!stereo) {
357  av_frame_free(&dst);
358  return AVERROR(ENOMEM);
359  }
360  stereo->type = s->format;
361 
362  return ff_filter_frame(outlink, dst);
363  }
364 }
365 
366 #define OFFSET(x) offsetof(FramepackContext, x)
367 #define V AV_OPT_FLAG_VIDEO_PARAM
368 static const AVOption framepack_options[] = {
369  { "format", "Frame pack output format", OFFSET(format), AV_OPT_TYPE_INT,
370  { .i64 = AV_STEREO3D_SIDEBYSIDE }, 0, INT_MAX, .flags = V, .unit = "format" },
371  { "sbs", "Views are packed next to each other", 0, AV_OPT_TYPE_CONST,
372  { .i64 = AV_STEREO3D_SIDEBYSIDE }, INT_MIN, INT_MAX, .flags = V, .unit = "format" },
373  { "tab", "Views are packed on top of each other", 0, AV_OPT_TYPE_CONST,
374  { .i64 = AV_STEREO3D_TOPBOTTOM }, INT_MIN, INT_MAX, .flags = V, .unit = "format" },
375  { "frameseq", "Views are one after the other", 0, AV_OPT_TYPE_CONST,
376  { .i64 = AV_STEREO3D_FRAMESEQUENCE }, INT_MIN, INT_MAX, .flags = V, .unit = "format" },
377  { "lines", "Views are interleaved by lines", 0, AV_OPT_TYPE_CONST,
378  { .i64 = AV_STEREO3D_LINES }, INT_MIN, INT_MAX, .flags = V, .unit = "format" },
379  { "columns", "Views are interleaved by columns", 0, AV_OPT_TYPE_CONST,
380  { .i64 = AV_STEREO3D_COLUMNS }, INT_MIN, INT_MAX, .flags = V, .unit = "format" },
381  { NULL },
382 };
383 
384 AVFILTER_DEFINE_CLASS(framepack);
385 
386 static const AVFilterPad framepack_inputs[] = {
387  {
388  .name = "left",
389  .type = AVMEDIA_TYPE_VIDEO,
390  .filter_frame = filter_frame_left,
391  .needs_fifo = 1,
392  },
393  {
394  .name = "right",
395  .type = AVMEDIA_TYPE_VIDEO,
396  .filter_frame = filter_frame_right,
397  .needs_fifo = 1,
398  },
399  { NULL }
400 };
401 
402 static const AVFilterPad framepack_outputs[] = {
403  {
404  .name = "packed",
405  .type = AVMEDIA_TYPE_VIDEO,
406  .config_props = config_output,
407  .request_frame = request_frame,
408  },
409  { NULL }
410 };
411 
412 AVFilter ff_vf_framepack = {
413  .name = "framepack",
414  .description = NULL_IF_CONFIG_SMALL("Generate a frame packed stereoscopic video."),
415  .priv_size = sizeof(FramepackContext),
416  .priv_class = &framepack_class,
417  .query_formats = query_formats,
418  .inputs = framepack_inputs,
419  .outputs = framepack_outputs,
420  .uninit = framepack_uninit,
421 };
ff_get_video_buffer
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
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
AV_STEREO3D_VIEW_LEFT
@ AV_STEREO3D_VIEW_LEFT
Frame contains only the left view.
Definition: stereo3d.h:156
AVERROR
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
opt.h
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
out
FILE * out
Definition: movenc.c:54
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
spatial_frame_pack
static av_always_inline void spatial_frame_pack(AVFilterLink *outlink, AVFrame *dst)
Definition: vf_framepack.c:251
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2522
rational.h
inlink
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
Definition: filter_design.txt:212
framepack_outputs
static const AVFilterPad framepack_outputs[]
Definition: vf_framepack.c:402
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
pixdesc.h
AVOption
AVOption.
Definition: opt.h:246
RIGHT
#define RIGHT
Definition: vf_framepack.c:41
ff_request_frame
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:407
try_push_frame
static int try_push_frame(AVFilterContext *ctx)
Definition: vf_framepack.c:305
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:148
video.h
AV_STEREO3D_VIEW_RIGHT
@ AV_STEREO3D_VIEW_RIGHT
Frame contains only the right view.
Definition: stereo3d.h:161
filter_frame_right
static int filter_frame_right(AVFilterLink *inlink, AVFrame *frame)
Definition: vf_framepack.c:281
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
formats.h
AV_STEREO3D_SIDEBYSIDE
@ AV_STEREO3D_SIDEBYSIDE
Views are next to each other.
Definition: stereo3d.h:67
ff_vf_framepack
AVFilter ff_vf_framepack
Definition: vf_framepack.c:412
FramepackContext
Definition: vf_framepack.c:43
dstp
BYTE * dstp
Definition: avisynth_c.h:908
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:353
plane
int plane
Definition: avisynth_c.h:384
OFFSET
#define OFFSET(x)
Definition: vf_framepack.c:366
AVRational::num
int num
Numerator.
Definition: rational.h:59
src
#define src
Definition: vp8dsp.c:254
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
filter_frame_left
static int filter_frame_left(AVFilterLink *inlink, AVFrame *frame)
Definition: vf_framepack.c:274
AV_STEREO3D_FRAMESEQUENCE
@ AV_STEREO3D_FRAMESEQUENCE
Views are alternated temporally.
Definition: stereo3d.h:92
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
av_cold
#define av_cold
Definition: attributes.h:84
vertical_frame_pack
static void vertical_frame_pack(AVFilterLink *outlink, AVFrame *out, int interleaved)
Definition: vf_framepack.c:212
ff_set_common_formats
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
AV_PIX_FMT_YUVJ422P
@ AV_PIX_FMT_YUVJ422P
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
width
#define width
AV_STEREO3D_LINES
@ AV_STEREO3D_LINES
Views are packed per line, as if interlaced.
Definition: stereo3d.h:129
stereo3d.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
AV_PIX_FMT_YUVA420P
@ AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
format
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 format(the sample packing is implied by the sample format) and sample rate. The lists are not just lists
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
ctx
AVFormatContext * ctx
Definition: movenc.c:48
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(framepack)
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
AV_PIX_FMT_YUVJ444P
@ AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_framepack.c:62
V
#define V
Definition: vf_framepack.c:367
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
NULL
#define NULL
Definition: coverity.c:32
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654
FramepackContext::input_views
AVFrame * input_views[2]
input frames
Definition: vf_framepack.c:50
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
horizontal_frame_pack
static void horizontal_frame_pack(AVFilterLink *outlink, AVFrame *out, int interleaved)
Definition: vf_framepack.c:147
AV_PIX_FMT_YUVJ420P
@ AV_PIX_FMT_YUVJ420P
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
FramepackContext::double_pts
int64_t double_pts
new pts for frameseq mode
Definition: vf_framepack.c:52
inputs
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Definition: filter_design.txt:243
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:188
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
FramepackContext::format
enum AVStereo3DType format
frame pack type output
Definition: vf_framepack.c:48
LEFT
#define LEFT
Definition: vf_framepack.c:40
height
#define height
internal.h
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_framepack.c:80
AV_STEREO3D_TOPBOTTOM
@ AV_STEREO3D_TOPBOTTOM
Views are on top of each other.
Definition: stereo3d.h:79
common.h
av_always_inline
#define av_always_inline
Definition: attributes.h:43
AV_PIX_FMT_YUVJ440P
@ AV_PIX_FMT_YUVJ440P
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range
Definition: pixfmt.h:100
uint8_t
uint8_t
Definition: audio_convert.c:194
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
framepack_uninit
static av_cold void framepack_uninit(AVFilterContext *ctx)
Definition: vf_framepack.c:71
framepack_options
static const AVOption framepack_options[]
Definition: vf_framepack.c:368
av_cmp_q
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:89
AVFilter
Filter definition.
Definition: avfilter.h:144
ret
ret
Definition: filter_design.txt:187
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
AV_STEREO3D_COLUMNS
@ AV_STEREO3D_COLUMNS
Views are packed per column.
Definition: stereo3d.h:141
AVStereo3D::type
enum AVStereo3DType type
How views are packed within the video.
Definition: stereo3d.h:180
FramepackContext::pix_desc
const AVPixFmtDescriptor * pix_desc
agreed pixel format
Definition: vf_framepack.c:46
av_image_copy
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4], const uint8_t *src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Copy image in src_data to dst_data.
Definition: imgutils.c:387
AVRational::den
int den
Denominator.
Definition: rational.h:60
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:223
avfilter.h
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
AVFilterContext
An instance of a filter.
Definition: avfilter.h:338
request_frame
static int request_frame(AVFilterLink *outlink)
Definition: vf_framepack.c:288
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
av_stereo3d_create_side_data
AVStereo3D * av_stereo3d_create_side_data(AVFrame *frame)
Allocate a complete AVFrameSideData and add it to the frame.
Definition: stereo3d.c:33
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
AVStereo3D::view
enum AVStereo3DView view
Determines which views are packed.
Definition: stereo3d.h:190
framepack_inputs
static const AVFilterPad framepack_inputs[]
Definition: vf_framepack.c:386
imgutils.h
AVERROR_BUG
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
AVStereo3DType
AVStereo3DType
List of possible 3D Types.
Definition: stereo3d.h:51
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
length
const char int length
Definition: avisynth_c.h:860
uninit
static av_cold int uninit(AVCodecContext *avctx)
Definition: crystalhd.c:279
AVStereo3D
Stereo 3D type: this structure describes how two videos are packed within a single video surface,...
Definition: stereo3d.h:176
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:232
formats_supported
static enum AVPixelFormat formats_supported[]
Definition: vf_framepack.c:55
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