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vf_tinterlace.c
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1 /*
2  * Copyright (c) 2011 Stefano Sabatini
3  * Copyright (c) 2010 Baptiste Coudurier
4  * Copyright (c) 2003 Michael Zucchi <notzed@ximian.com>
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License along
19  * with FFmpeg if not, write to the Free Software Foundation, Inc.,
20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21  */
22 
23 /**
24  * @file
25  * temporal field interlace filter, ported from MPlayer/libmpcodecs
26  */
27 
28 #include "libavutil/opt.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/avassert.h"
31 #include "avfilter.h"
32 #include "internal.h"
33 #include "tinterlace.h"
34 
35 #define OFFSET(x) offsetof(TInterlaceContext, x)
36 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
37 #define TINTERLACE_FLAG_VLPF 01
38 #define TINTERLACE_FLAG_EXACT_TB 2
39 
40 static const AVOption tinterlace_options[] = {
41  {"mode", "select interlace mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_MERGE}, 0, MODE_NB-1, FLAGS, "mode"},
42  {"merge", "merge fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_MERGE}, INT_MIN, INT_MAX, FLAGS, "mode"},
43  {"drop_even", "drop even fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_DROP_EVEN}, INT_MIN, INT_MAX, FLAGS, "mode"},
44  {"drop_odd", "drop odd fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_DROP_ODD}, INT_MIN, INT_MAX, FLAGS, "mode"},
45  {"pad", "pad alternate lines with black", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PAD}, INT_MIN, INT_MAX, FLAGS, "mode"},
46  {"interleave_top", "interleave top and bottom fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE_TOP}, INT_MIN, INT_MAX, FLAGS, "mode"},
47  {"interleave_bottom", "interleave bottom and top fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE_BOTTOM}, INT_MIN, INT_MAX, FLAGS, "mode"},
48  {"interlacex2", "interlace fields from two consecutive frames", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLACEX2}, INT_MIN, INT_MAX, FLAGS, "mode"},
49 
50  {"flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, INT_MAX, 0, "flags" },
51  {"low_pass_filter", "enable vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_VLPF}, INT_MIN, INT_MAX, FLAGS, "flags" },
52  {"vlpf", "enable vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_VLPF}, INT_MIN, INT_MAX, FLAGS, "flags" },
53  {"exact_tb", "force a timebase which can represent timestamps exactly", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_EXACT_TB}, INT_MIN, INT_MAX, FLAGS, "flags" },
54 
55  {NULL}
56 };
57 
58 AVFILTER_DEFINE_CLASS(tinterlace);
59 
60 #define FULL_SCALE_YUVJ_FORMATS \
61  AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P
62 
63 static const enum AVPixelFormat full_scale_yuvj_pix_fmts[] = {
65 };
66 
67 static const AVRational standard_tbs[] = {
68  {1, 25},
69  {1, 30},
70  {1001, 30000},
71 };
72 
74 {
75  static const enum AVPixelFormat pix_fmts[] = {
82  };
83 
85  return 0;
86 }
87 
88 static void lowpass_line_c(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp,
89  const uint8_t *srcp_above, const uint8_t *srcp_below)
90 {
91  int i;
92  for (i = 0; i < width; i++) {
93  // this calculation is an integer representation of
94  // '0.5 * current + 0.25 * above + 0.25 * below'
95  // '1 +' is for rounding.
96  dstp[i] = (1 + srcp[i] + srcp[i] + srcp_above[i] + srcp_below[i]) >> 2;
97  }
98 }
99 
100 static av_cold void uninit(AVFilterContext *ctx)
101 {
102  TInterlaceContext *tinterlace = ctx->priv;
103 
104  av_frame_free(&tinterlace->cur );
105  av_frame_free(&tinterlace->next);
106  av_freep(&tinterlace->black_data[0]);
107 }
108 
109 static int config_out_props(AVFilterLink *outlink)
110 {
111  AVFilterContext *ctx = outlink->src;
112  AVFilterLink *inlink = outlink->src->inputs[0];
113  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
114  TInterlaceContext *tinterlace = ctx->priv;
115  int i;
116 
117  tinterlace->vsub = desc->log2_chroma_h;
118  outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
119  outlink->w = inlink->w;
120  outlink->h = tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD ?
121  inlink->h*2 : inlink->h;
122 
123  if (tinterlace->mode == MODE_PAD) {
124  uint8_t black[4] = { 16, 128, 128, 16 };
125  int i, ret;
127  black[0] = black[3] = 0;
128  ret = av_image_alloc(tinterlace->black_data, tinterlace->black_linesize,
129  outlink->w, outlink->h, outlink->format, 1);
130  if (ret < 0)
131  return ret;
132 
133  /* fill black picture with black */
134  for (i = 0; i < 4 && tinterlace->black_data[i]; i++) {
135  int h = i == 1 || i == 2 ? FF_CEIL_RSHIFT(outlink->h, desc->log2_chroma_h) : outlink->h;
136  memset(tinterlace->black_data[i], black[i],
137  tinterlace->black_linesize[i] * h);
138  }
139  }
140  if ((tinterlace->flags & TINTERLACE_FLAG_VLPF)
141  && !(tinterlace->mode == MODE_INTERLEAVE_TOP
142  || tinterlace->mode == MODE_INTERLEAVE_BOTTOM)) {
143  av_log(ctx, AV_LOG_WARNING, "low_pass_filter flag ignored with mode %d\n",
144  tinterlace->mode);
145  tinterlace->flags &= ~TINTERLACE_FLAG_VLPF;
146  }
147  tinterlace->preout_time_base = inlink->time_base;
148  if (tinterlace->mode == MODE_INTERLACEX2) {
149  tinterlace->preout_time_base.den *= 2;
150  outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){2,1});
151  outlink->time_base = av_mul_q(inlink->time_base , (AVRational){1,2});
152  } else if (tinterlace->mode != MODE_PAD) {
153  outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){1,2});
154  outlink->time_base = av_mul_q(inlink->time_base , (AVRational){2,1});
155  }
156 
157  for (i = 0; i<FF_ARRAY_ELEMS(standard_tbs); i++){
158  if (!av_cmp_q(standard_tbs[i], outlink->time_base))
159  break;
160  }
161  if (i == FF_ARRAY_ELEMS(standard_tbs) ||
162  (tinterlace->flags & TINTERLACE_FLAG_EXACT_TB))
163  outlink->time_base = tinterlace->preout_time_base;
164 
165  if (tinterlace->flags & TINTERLACE_FLAG_VLPF) {
166  tinterlace->lowpass_line = lowpass_line_c;
167  if (ARCH_X86)
168  ff_tinterlace_init_x86(tinterlace);
169  }
170 
171  av_log(ctx, AV_LOG_VERBOSE, "mode:%d filter:%s h:%d -> h:%d\n",
172  tinterlace->mode, (tinterlace->flags & TINTERLACE_FLAG_VLPF) ? "on" : "off",
173  inlink->h, outlink->h);
174 
175  return 0;
176 }
177 
178 #define FIELD_UPPER 0
179 #define FIELD_LOWER 1
180 #define FIELD_UPPER_AND_LOWER 2
181 
182 /**
183  * Copy picture field from src to dst.
184  *
185  * @param src_field copy from upper, lower field or both
186  * @param interleave leave a padding line between each copied line
187  * @param dst_field copy to upper or lower field,
188  * only meaningful when interleave is selected
189  * @param flags context flags
190  */
191 static inline
193  uint8_t *dst[4], int dst_linesize[4],
194  const uint8_t *src[4], int src_linesize[4],
195  enum AVPixelFormat format, int w, int src_h,
196  int src_field, int interleave, int dst_field,
197  int flags)
198 {
199  const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format);
200  int hsub = desc->log2_chroma_w;
201  int plane, vsub = desc->log2_chroma_h;
202  int k = src_field == FIELD_UPPER_AND_LOWER ? 1 : 2;
203  int h;
204 
205  for (plane = 0; plane < desc->nb_components; plane++) {
206  int lines = plane == 1 || plane == 2 ? FF_CEIL_RSHIFT(src_h, vsub) : src_h;
207  int cols = plane == 1 || plane == 2 ? FF_CEIL_RSHIFT( w, hsub) : w;
208  uint8_t *dstp = dst[plane];
209  const uint8_t *srcp = src[plane];
210 
211  lines = (lines + (src_field == FIELD_UPPER)) / k;
212  if (src_field == FIELD_LOWER)
213  srcp += src_linesize[plane];
214  if (interleave && dst_field == FIELD_LOWER)
215  dstp += dst_linesize[plane];
216  if (flags & TINTERLACE_FLAG_VLPF) {
217  // Low-pass filtering is required when creating an interlaced destination from
218  // a progressive source which contains high-frequency vertical detail.
219  // Filtering will reduce interlace 'twitter' and Moire patterning.
220  int srcp_linesize = src_linesize[plane] * k;
221  int dstp_linesize = dst_linesize[plane] * (interleave ? 2 : 1);
222  for (h = lines; h > 0; h--) {
223  const uint8_t *srcp_above = srcp - src_linesize[plane];
224  const uint8_t *srcp_below = srcp + src_linesize[plane];
225  if (h == lines) srcp_above = srcp; // there is no line above
226  if (h == 1) srcp_below = srcp; // there is no line below
227 
228  tinterlace->lowpass_line(dstp, cols, srcp, srcp_above, srcp_below);
229  dstp += dstp_linesize;
230  srcp += srcp_linesize;
231  }
232  } else {
233  av_image_copy_plane(dstp, dst_linesize[plane] * (interleave ? 2 : 1),
234  srcp, src_linesize[plane]*k, cols, lines);
235  }
236  }
237 }
238 
239 static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
240 {
241  AVFilterContext *ctx = inlink->dst;
242  AVFilterLink *outlink = ctx->outputs[0];
243  TInterlaceContext *tinterlace = ctx->priv;
244  AVFrame *cur, *next, *out;
245  int field, tff, ret;
246 
247  av_frame_free(&tinterlace->cur);
248  tinterlace->cur = tinterlace->next;
249  tinterlace->next = picref;
250 
251  cur = tinterlace->cur;
252  next = tinterlace->next;
253  /* we need at least two frames */
254  if (!tinterlace->cur)
255  return 0;
256 
257  switch (tinterlace->mode) {
258  case MODE_MERGE: /* move the odd frame into the upper field of the new image, even into
259  * the lower field, generating a double-height video at half framerate */
260  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
261  if (!out)
262  return AVERROR(ENOMEM);
263  av_frame_copy_props(out, cur);
264  out->height = outlink->h;
265  out->interlaced_frame = 1;
266  out->top_field_first = 1;
267 
268  /* write odd frame lines into the upper field of the new frame */
269  copy_picture_field(tinterlace, out->data, out->linesize,
270  (const uint8_t **)cur->data, cur->linesize,
271  inlink->format, inlink->w, inlink->h,
272  FIELD_UPPER_AND_LOWER, 1, FIELD_UPPER, tinterlace->flags);
273  /* write even frame lines into the lower field of the new frame */
274  copy_picture_field(tinterlace, out->data, out->linesize,
275  (const uint8_t **)next->data, next->linesize,
276  inlink->format, inlink->w, inlink->h,
277  FIELD_UPPER_AND_LOWER, 1, FIELD_LOWER, tinterlace->flags);
278  av_frame_free(&tinterlace->next);
279  break;
280 
281  case MODE_DROP_ODD: /* only output even frames, odd frames are dropped; height unchanged, half framerate */
282  case MODE_DROP_EVEN: /* only output odd frames, even frames are dropped; height unchanged, half framerate */
283  out = av_frame_clone(tinterlace->mode == MODE_DROP_EVEN ? cur : next);
284  if (!out)
285  return AVERROR(ENOMEM);
286  av_frame_free(&tinterlace->next);
287  break;
288 
289  case MODE_PAD: /* expand each frame to double height, but pad alternate
290  * lines with black; framerate unchanged */
291  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
292  if (!out)
293  return AVERROR(ENOMEM);
294  av_frame_copy_props(out, cur);
295  out->height = outlink->h;
296 
297  field = (1 + tinterlace->frame) & 1 ? FIELD_UPPER : FIELD_LOWER;
298  /* copy upper and lower fields */
299  copy_picture_field(tinterlace, out->data, out->linesize,
300  (const uint8_t **)cur->data, cur->linesize,
301  inlink->format, inlink->w, inlink->h,
302  FIELD_UPPER_AND_LOWER, 1, field, tinterlace->flags);
303  /* pad with black the other field */
304  copy_picture_field(tinterlace, out->data, out->linesize,
305  (const uint8_t **)tinterlace->black_data, tinterlace->black_linesize,
306  inlink->format, inlink->w, inlink->h,
307  FIELD_UPPER_AND_LOWER, 1, !field, tinterlace->flags);
308  break;
309 
310  /* interleave upper/lower lines from odd frames with lower/upper lines from even frames,
311  * halving the frame rate and preserving image height */
312  case MODE_INTERLEAVE_TOP: /* top field first */
313  case MODE_INTERLEAVE_BOTTOM: /* bottom field first */
314  tff = tinterlace->mode == MODE_INTERLEAVE_TOP;
315  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
316  if (!out)
317  return AVERROR(ENOMEM);
318  av_frame_copy_props(out, cur);
319  out->interlaced_frame = 1;
320  out->top_field_first = tff;
321 
322  /* copy upper/lower field from cur */
323  copy_picture_field(tinterlace, out->data, out->linesize,
324  (const uint8_t **)cur->data, cur->linesize,
325  inlink->format, inlink->w, inlink->h,
326  tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER,
327  tinterlace->flags);
328  /* copy lower/upper field from next */
329  copy_picture_field(tinterlace, out->data, out->linesize,
330  (const uint8_t **)next->data, next->linesize,
331  inlink->format, inlink->w, inlink->h,
332  tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER,
333  tinterlace->flags);
334  av_frame_free(&tinterlace->next);
335  break;
336  case MODE_INTERLACEX2: /* re-interlace preserving image height, double frame rate */
337  /* output current frame first */
338  out = av_frame_clone(cur);
339  if (!out)
340  return AVERROR(ENOMEM);
341  out->interlaced_frame = 1;
342  if (cur->pts != AV_NOPTS_VALUE)
343  out->pts = cur->pts*2;
344 
345  out->pts = av_rescale_q(out->pts, tinterlace->preout_time_base, outlink->time_base);
346  if ((ret = ff_filter_frame(outlink, out)) < 0)
347  return ret;
348 
349  /* output mix of current and next frame */
350  tff = next->top_field_first;
351  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
352  if (!out)
353  return AVERROR(ENOMEM);
354  av_frame_copy_props(out, next);
355  out->interlaced_frame = 1;
356  out->top_field_first = !tff;
357 
358  if (next->pts != AV_NOPTS_VALUE && cur->pts != AV_NOPTS_VALUE)
359  out->pts = cur->pts + next->pts;
360  else
361  out->pts = AV_NOPTS_VALUE;
362  /* write current frame second field lines into the second field of the new frame */
363  copy_picture_field(tinterlace, out->data, out->linesize,
364  (const uint8_t **)cur->data, cur->linesize,
365  inlink->format, inlink->w, inlink->h,
366  tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER,
367  tinterlace->flags);
368  /* write next frame first field lines into the first field of the new frame */
369  copy_picture_field(tinterlace, out->data, out->linesize,
370  (const uint8_t **)next->data, next->linesize,
371  inlink->format, inlink->w, inlink->h,
372  tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER,
373  tinterlace->flags);
374  break;
375  default:
376  av_assert0(0);
377  }
378 
379  out->pts = av_rescale_q(out->pts, tinterlace->preout_time_base, outlink->time_base);
380  ret = ff_filter_frame(outlink, out);
381  tinterlace->frame++;
382 
383  return ret;
384 }
385 
386 static const AVFilterPad tinterlace_inputs[] = {
387  {
388  .name = "default",
389  .type = AVMEDIA_TYPE_VIDEO,
390  .filter_frame = filter_frame,
391  },
392  { NULL }
393 };
394 
395 static const AVFilterPad tinterlace_outputs[] = {
396  {
397  .name = "default",
398  .type = AVMEDIA_TYPE_VIDEO,
399  .config_props = config_out_props,
400  },
401  { NULL }
402 };
403 
405  .name = "tinterlace",
406  .description = NULL_IF_CONFIG_SMALL("Perform temporal field interlacing."),
407  .priv_size = sizeof(TInterlaceContext),
408  .uninit = uninit,
410  .inputs = tinterlace_inputs,
411  .outputs = tinterlace_outputs,
412  .priv_class = &tinterlace_class,
413 };
#define NULL
Definition: coverity.c:32
static enum AVPixelFormat full_scale_yuvj_pix_fmts[]
Definition: vf_tinterlace.c:63
static int query_formats(AVFilterContext *ctx)
Definition: vf_tinterlace.c:73
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2029
This structure describes decoded (raw) audio or video data.
Definition: frame.h:163
#define OFFSET(x)
Definition: vf_tinterlace.c:35
AVOption.
Definition: opt.h:255
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:73
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:181
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:246
Main libavfilter public API header.
AVFrame * next
Definition: tinterlace.h:52
int av_image_alloc(uint8_t *pointers[4], int linesizes[4], int w, int h, enum AVPixelFormat pix_fmt, int align)
Allocate an image with size w and h and pixel format pix_fmt, and fill pointers and linesizes accordi...
Definition: imgutils.c:192
#define FIELD_LOWER
static int av_cmp_q(AVRational a, AVRational b)
Compare two rationals.
Definition: rational.h:66
#define FF_ARRAY_ELEMS(a)
static av_always_inline void interleave(IDWTELEM *dst, IDWTELEM *src0, IDWTELEM *src1, int w2, int add, int shift)
Definition: dirac_dwt.c:40
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:109
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:80
int flags
flags affecting interlacing algorithm
Definition: tinterlace.h:48
AVFilter ff_vf_tinterlace
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:294
#define FULL_SCALE_YUVJ_FORMATS
Definition: vf_tinterlace.c:60
BYTE int const BYTE * srcp
Definition: avisynth_c.h:714
const char * name
Pad name.
Definition: internal.h:67
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:641
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1145
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:108
uint8_t
#define av_cold
Definition: attributes.h:74
static const AVOption tinterlace_options[]
Definition: vf_tinterlace.c:40
temporal field interlace filter, ported from MPlayer/libmpcodecs
mode
Definition: f_perms.c:27
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:249
int frame
number of the output frame
Definition: tinterlace.h:49
static void lowpass_line_c(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp, const uint8_t *srcp_above, const uint8_t *srcp_below)
Definition: vf_tinterlace.c:88
int black_linesize[4]
Definition: tinterlace.h:54
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:191
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:359
void 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:539
int ff_fmt_is_in(int fmt, const int *fmts)
Tell is a format is contained in the provided list terminated by -1.
Definition: formats.c:254
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:61
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:140
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:267
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:89
Frame requests may need to loop in order to be fulfilled.
Definition: internal.h:359
void ff_tinterlace_init_x86(TInterlaceContext *interlace)
#define ARCH_X86
Definition: config.h:38
int vsub
chroma vertical subsampling
Definition: tinterlace.h:50
BYTE * dstp
Definition: avisynth_c.h:714
#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:148
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:180
void * priv
private data for use by the filter
Definition: avfilter.h:654
#define FLAGS
Definition: vf_tinterlace.c:36
static void copy_picture_field(TInterlaceContext *tinterlace, uint8_t *dst[4], int dst_linesize[4], const uint8_t *src[4], int src_linesize[4], enum AVPixelFormat format, int w, int src_h, int src_field, int interleave, int dst_field, int flags)
Copy picture field from src to dst.
simple assert() macros that are a bit more flexible than ISO C assert().
AVFILTER_DEFINE_CLASS(tinterlace)
#define TINTERLACE_FLAG_EXACT_TB
Definition: vf_tinterlace.c:38
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:72
uint8_t nb_components
The number of components each pixel has, (1-4)
Definition: pixdesc.h:71
#define FIELD_UPPER
static av_cold void uninit(AVFilterContext *ctx)
ret
Definition: avfilter.c:974
#define FF_CEIL_RSHIFT(a, b)
Definition: common.h:57
enum TInterlaceMode mode
interlace mode selected
Definition: tinterlace.h:46
static const AVFilterPad tinterlace_outputs[]
static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
static const AVRational standard_tbs[]
Definition: vf_tinterlace.c:67
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:364
AVS_Value src
Definition: avisynth_c.h:524
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:191
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:266
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
uint8_t * black_data[4]
buffer used to fill padded lines
Definition: tinterlace.h:53
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:74
Filter definition.
Definition: avfilter.h:470
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:237
rational number numerator/denominator
Definition: rational.h:43
const char * name
Filter name.
Definition: avfilter.h:474
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:648
AVFrame * cur
Definition: tinterlace.h:51
static const AVFilterPad tinterlace_inputs[]
static int flags
Definition: cpu.c:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:174
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> out
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:68
Y , 8bpp.
Definition: pixfmt.h:76
static int config_out_props(AVFilterLink *outlink)
void(* lowpass_line)(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp, const uint8_t *srcp_above, const uint8_t *srcp_below)
Definition: tinterlace.h:55
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:75
int den
denominator
Definition: rational.h:45
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:364
An instance of a filter.
Definition: avfilter.h:633
int height
Definition: frame.h:212
#define av_freep(p)
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:106
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:273
internal API functions
#define FIELD_UPPER_AND_LOWER
AVRational preout_time_base
Definition: tinterlace.h:47
AVPixelFormat
Pixel format.
Definition: pixfmt.h:66
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:463
#define TINTERLACE_FLAG_VLPF
Definition: vf_tinterlace.c:37
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:241
static int width