2 * Copyright (c) 2017 Thomas Mundt <tmundt75@gmail.com>
3 * Copyright (c) 2011 Stefano Sabatini
4 * Copyright (c) 2010 Baptiste Coudurier
5 * Copyright (c) 2003 Michael Zucchi <notzed@ximian.com>
7 * This file is part of FFmpeg.
9 * FFmpeg is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License along
20 * with FFmpeg if not, write to the Free Software Foundation, Inc.,
21 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
26 * temporal field interlace filter, ported from MPlayer/libmpcodecs
29 #include "libavutil/opt.h"
30 #include "libavutil/imgutils.h"
31 #include "libavutil/avassert.h"
34 #include "tinterlace.h"
36 #define OFFSET(x) offsetof(TInterlaceContext, x)
37 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
39 static const AVOption tinterlace_options[] = {
40 {"mode", "select interlace mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_MERGE}, 0, MODE_NB-1, FLAGS, "mode"},
41 {"merge", "merge fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_MERGE}, INT_MIN, INT_MAX, FLAGS, "mode"},
42 {"drop_even", "drop even fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_DROP_EVEN}, INT_MIN, INT_MAX, FLAGS, "mode"},
43 {"drop_odd", "drop odd fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_DROP_ODD}, INT_MIN, INT_MAX, FLAGS, "mode"},
44 {"pad", "pad alternate lines with black", 0, AV_OPT_TYPE_CONST, {.i64=MODE_PAD}, INT_MIN, INT_MAX, FLAGS, "mode"},
45 {"interleave_top", "interleave top and bottom fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE_TOP}, INT_MIN, INT_MAX, FLAGS, "mode"},
46 {"interleave_bottom", "interleave bottom and top fields", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLEAVE_BOTTOM}, INT_MIN, INT_MAX, FLAGS, "mode"},
47 {"interlacex2", "interlace fields from two consecutive frames", 0, AV_OPT_TYPE_CONST, {.i64=MODE_INTERLACEX2}, INT_MIN, INT_MAX, FLAGS, "mode"},
48 {"mergex2", "merge fields keeping same frame rate", 0, AV_OPT_TYPE_CONST, {.i64=MODE_MERGEX2}, INT_MIN, INT_MAX, FLAGS, "mode"},
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 {"complex_filter", "enable complex vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_CVLPF},INT_MIN, INT_MAX, FLAGS, "flags" },
54 {"cvlpf", "enable complex vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_CVLPF},INT_MIN, INT_MAX, FLAGS, "flags" },
55 {"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" },
60 AVFILTER_DEFINE_CLASS(tinterlace);
62 #define FULL_SCALE_YUVJ_FORMATS \
63 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P
65 static const enum AVPixelFormat full_scale_yuvj_pix_fmts[] = {
66 FULL_SCALE_YUVJ_FORMATS, AV_PIX_FMT_NONE
69 static const AVRational standard_tbs[] = {
75 static int query_formats(AVFilterContext *ctx)
77 static const enum AVPixelFormat pix_fmts[] = {
78 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
79 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
80 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
81 AV_PIX_FMT_YUV420P10LE, AV_PIX_FMT_YUV422P10LE,
82 AV_PIX_FMT_YUV440P10LE, AV_PIX_FMT_YUV444P10LE,
83 AV_PIX_FMT_YUV420P12LE, AV_PIX_FMT_YUV422P12LE,
84 AV_PIX_FMT_YUV440P12LE, AV_PIX_FMT_YUV444P12LE,
85 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
86 AV_PIX_FMT_YUVA420P10LE, AV_PIX_FMT_YUVA422P10LE, AV_PIX_FMT_YUVA444P10LE,
87 AV_PIX_FMT_GRAY8, FULL_SCALE_YUVJ_FORMATS,
91 AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
93 return AVERROR(ENOMEM);
94 return ff_set_common_formats(ctx, fmts_list);
97 static void lowpass_line_c(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp,
98 ptrdiff_t mref, ptrdiff_t pref, int clip_max)
100 const uint8_t *srcp_above = srcp + mref;
101 const uint8_t *srcp_below = srcp + pref;
103 for (i = 0; i < width; i++) {
104 // this calculation is an integer representation of
105 // '0.5 * current + 0.25 * above + 0.25 * below'
106 // '1 +' is for rounding.
107 dstp[i] = (1 + srcp[i] + srcp[i] + srcp_above[i] + srcp_below[i]) >> 2;
111 static void lowpass_line_c_16(uint8_t *dst8, ptrdiff_t width, const uint8_t *src8,
112 ptrdiff_t mref, ptrdiff_t pref, int clip_max)
114 uint16_t *dstp = (uint16_t *)dst8;
115 const uint16_t *srcp = (const uint16_t *)src8;
116 const uint16_t *srcp_above = srcp + mref / 2;
117 const uint16_t *srcp_below = srcp + pref / 2;
119 for (i = 0; i < width; i++) {
120 // this calculation is an integer representation of
121 // '0.5 * current + 0.25 * above + 0.25 * below'
122 // '1 +' is for rounding.
123 src_x = av_le2ne16(srcp[i]) << 1;
124 dstp[i] = av_le2ne16((1 + src_x + av_le2ne16(srcp_above[i])
125 + av_le2ne16(srcp_below[i])) >> 2);
129 static void lowpass_line_complex_c(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp,
130 ptrdiff_t mref, ptrdiff_t pref, int clip_max)
132 const uint8_t *srcp_above = srcp + mref;
133 const uint8_t *srcp_below = srcp + pref;
134 const uint8_t *srcp_above2 = srcp + mref * 2;
135 const uint8_t *srcp_below2 = srcp + pref * 2;
136 int i, src_x, src_ab;
137 for (i = 0; i < width; i++) {
138 // this calculation is an integer representation of
139 // '0.75 * current + 0.25 * above + 0.25 * below - 0.125 * above2 - 0.125 * below2'
140 // '4 +' is for rounding.
141 src_x = srcp[i] << 1;
142 src_ab = srcp_above[i] + srcp_below[i];
143 dstp[i] = av_clip_uint8((4 + ((srcp[i] + src_x + src_ab) << 1)
144 - srcp_above2[i] - srcp_below2[i]) >> 3);
145 // Prevent over-sharpening:
146 // dst must not exceed src when the average of above and below
147 // is less than src. And the other way around.
148 if (src_ab > src_x) {
149 if (dstp[i] < srcp[i])
151 } else if (dstp[i] > srcp[i])
156 static void lowpass_line_complex_c_16(uint8_t *dst8, ptrdiff_t width, const uint8_t *src8,
157 ptrdiff_t mref, ptrdiff_t pref, int clip_max)
159 uint16_t *dstp = (uint16_t *)dst8;
160 const uint16_t *srcp = (const uint16_t *)src8;
161 const uint16_t *srcp_above = srcp + mref / 2;
162 const uint16_t *srcp_below = srcp + pref / 2;
163 const uint16_t *srcp_above2 = srcp + mref;
164 const uint16_t *srcp_below2 = srcp + pref;
165 int i, dst_le, src_le, src_x, src_ab;
166 for (i = 0; i < width; i++) {
167 // this calculation is an integer representation of
168 // '0.75 * current + 0.25 * above + 0.25 * below - 0.125 * above2 - 0.125 * below2'
169 // '4 +' is for rounding.
170 src_le = av_le2ne16(srcp[i]);
172 src_ab = av_le2ne16(srcp_above[i]) + av_le2ne16(srcp_below[i]);
173 dst_le = av_clip((4 + ((src_le + src_x + src_ab) << 1)
174 - av_le2ne16(srcp_above2[i])
175 - av_le2ne16(srcp_below2[i])) >> 3, 0, clip_max);
176 // Prevent over-sharpening:
177 // dst must not exceed src when the average of above and below
178 // is less than src. And the other way around.
179 if (src_ab > src_x) {
181 dstp[i] = av_le2ne16(src_le);
183 dstp[i] = av_le2ne16(dst_le);
184 } else if (dst_le > src_le) {
185 dstp[i] = av_le2ne16(src_le);
187 dstp[i] = av_le2ne16(dst_le);
191 static av_cold void uninit(AVFilterContext *ctx)
193 TInterlaceContext *tinterlace = ctx->priv;
195 av_frame_free(&tinterlace->cur );
196 av_frame_free(&tinterlace->next);
197 av_freep(&tinterlace->black_data[0]);
200 static int config_out_props(AVFilterLink *outlink)
202 AVFilterContext *ctx = outlink->src;
203 AVFilterLink *inlink = outlink->src->inputs[0];
204 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
205 TInterlaceContext *tinterlace = ctx->priv;
208 tinterlace->vsub = desc->log2_chroma_h;
209 outlink->w = inlink->w;
210 outlink->h = tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD || tinterlace->mode == MODE_MERGEX2?
211 inlink->h*2 : inlink->h;
212 if (tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD || tinterlace->mode == MODE_MERGEX2)
213 outlink->sample_aspect_ratio = av_mul_q(inlink->sample_aspect_ratio,
216 if (tinterlace->mode == MODE_PAD) {
217 uint8_t black[4] = { 0, 0, 0, 16 };
219 ff_draw_init(&tinterlace->draw, outlink->format, 0);
220 ff_draw_color(&tinterlace->draw, &tinterlace->color, black);
221 if (ff_fmt_is_in(outlink->format, full_scale_yuvj_pix_fmts))
222 tinterlace->color.comp[0].u8[0] = 0;
223 ret = av_image_alloc(tinterlace->black_data, tinterlace->black_linesize,
224 outlink->w, outlink->h, outlink->format, 16);
228 ff_fill_rectangle(&tinterlace->draw, &tinterlace->color, tinterlace->black_data,
229 tinterlace->black_linesize, 0, 0, outlink->w, outlink->h);
231 if (tinterlace->flags & (TINTERLACE_FLAG_VLPF | TINTERLACE_FLAG_CVLPF)
232 && !(tinterlace->mode == MODE_INTERLEAVE_TOP
233 || tinterlace->mode == MODE_INTERLEAVE_BOTTOM)) {
234 av_log(ctx, AV_LOG_WARNING, "low_pass_filter flags ignored with mode %d\n",
236 tinterlace->flags &= ~(TINTERLACE_FLAG_VLPF | TINTERLACE_FLAG_CVLPF);
238 tinterlace->preout_time_base = inlink->time_base;
239 if (tinterlace->mode == MODE_INTERLACEX2) {
240 tinterlace->preout_time_base.den *= 2;
241 outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){2,1});
242 outlink->time_base = av_mul_q(inlink->time_base , (AVRational){1,2});
243 } else if (tinterlace->mode == MODE_MERGEX2) {
244 outlink->frame_rate = inlink->frame_rate;
245 outlink->time_base = inlink->time_base;
246 } else if (tinterlace->mode != MODE_PAD) {
247 outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){1,2});
248 outlink->time_base = av_mul_q(inlink->time_base , (AVRational){2,1});
251 for (i = 0; i<FF_ARRAY_ELEMS(standard_tbs); i++){
252 if (!av_cmp_q(standard_tbs[i], outlink->time_base))
255 if (i == FF_ARRAY_ELEMS(standard_tbs) ||
256 (tinterlace->flags & TINTERLACE_FLAG_EXACT_TB))
257 outlink->time_base = tinterlace->preout_time_base;
259 tinterlace->csp = av_pix_fmt_desc_get(outlink->format);
260 if (tinterlace->flags & TINTERLACE_FLAG_CVLPF) {
261 if (tinterlace->csp->comp[0].depth > 8)
262 tinterlace->lowpass_line = lowpass_line_complex_c_16;
264 tinterlace->lowpass_line = lowpass_line_complex_c;
266 ff_tinterlace_init_x86(tinterlace);
267 } else if (tinterlace->flags & TINTERLACE_FLAG_VLPF) {
268 if (tinterlace->csp->comp[0].depth > 8)
269 tinterlace->lowpass_line = lowpass_line_c_16;
271 tinterlace->lowpass_line = lowpass_line_c;
273 ff_tinterlace_init_x86(tinterlace);
276 av_log(ctx, AV_LOG_VERBOSE, "mode:%d filter:%s h:%d -> h:%d\n", tinterlace->mode,
277 (tinterlace->flags & TINTERLACE_FLAG_CVLPF) ? "complex" :
278 (tinterlace->flags & TINTERLACE_FLAG_VLPF) ? "linear" : "off",
279 inlink->h, outlink->h);
284 #define FIELD_UPPER 0
285 #define FIELD_LOWER 1
286 #define FIELD_UPPER_AND_LOWER 2
289 * Copy picture field from src to dst.
291 * @param src_field copy from upper, lower field or both
292 * @param interleave leave a padding line between each copied line
293 * @param dst_field copy to upper or lower field,
294 * only meaningful when interleave is selected
295 * @param flags context flags
298 void copy_picture_field(TInterlaceContext *tinterlace,
299 uint8_t *dst[4], int dst_linesize[4],
300 const uint8_t *src[4], int src_linesize[4],
301 enum AVPixelFormat format, int w, int src_h,
302 int src_field, int interleave, int dst_field,
305 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format);
306 int hsub = desc->log2_chroma_w;
307 int plane, vsub = desc->log2_chroma_h;
308 int k = src_field == FIELD_UPPER_AND_LOWER ? 1 : 2;
311 for (plane = 0; plane < desc->nb_components; plane++) {
312 int lines = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT(src_h, vsub) : src_h;
313 int cols = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT( w, hsub) : w;
314 uint8_t *dstp = dst[plane];
315 const uint8_t *srcp = src[plane];
316 int srcp_linesize = src_linesize[plane] * k;
317 int dstp_linesize = dst_linesize[plane] * (interleave ? 2 : 1);
318 int clip_max = (1 << tinterlace->csp->comp[plane].depth) - 1;
320 lines = (lines + (src_field == FIELD_UPPER)) / k;
321 if (src_field == FIELD_LOWER)
322 srcp += src_linesize[plane];
323 if (interleave && dst_field == FIELD_LOWER)
324 dstp += dst_linesize[plane];
325 // Low-pass filtering is required when creating an interlaced destination from
326 // a progressive source which contains high-frequency vertical detail.
327 // Filtering will reduce interlace 'twitter' and Moire patterning.
328 if (flags & (TINTERLACE_FLAG_VLPF | TINTERLACE_FLAG_CVLPF)) {
329 int x = !!(flags & TINTERLACE_FLAG_CVLPF);
330 for (h = lines; h > 0; h--) {
331 ptrdiff_t pref = src_linesize[plane];
332 ptrdiff_t mref = -pref;
333 if (h >= (lines - x)) mref = 0; // there is no line above
334 else if (h <= (1 + x)) pref = 0; // there is no line below
336 tinterlace->lowpass_line(dstp, cols, srcp, mref, pref, clip_max);
337 dstp += dstp_linesize;
338 srcp += srcp_linesize;
341 if (tinterlace->csp->comp[plane].depth > 8)
343 av_image_copy_plane(dstp, dstp_linesize, srcp, srcp_linesize, cols, lines);
348 static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
350 AVFilterContext *ctx = inlink->dst;
351 AVFilterLink *outlink = ctx->outputs[0];
352 TInterlaceContext *tinterlace = ctx->priv;
353 AVFrame *cur, *next, *out;
356 av_frame_free(&tinterlace->cur);
357 tinterlace->cur = tinterlace->next;
358 tinterlace->next = picref;
360 cur = tinterlace->cur;
361 next = tinterlace->next;
362 /* we need at least two frames */
363 if (!tinterlace->cur)
366 switch (tinterlace->mode) {
367 case MODE_MERGEX2: /* move the odd frame into the upper field of the new image, even into
368 * the lower field, generating a double-height video at same framerate */
369 case MODE_MERGE: /* move the odd frame into the upper field of the new image, even into
370 * the lower field, generating a double-height video at half framerate */
371 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
373 return AVERROR(ENOMEM);
374 av_frame_copy_props(out, cur);
375 out->height = outlink->h;
376 out->interlaced_frame = 1;
377 out->top_field_first = 1;
378 out->sample_aspect_ratio = av_mul_q(cur->sample_aspect_ratio, av_make_q(2, 1));
380 /* write odd frame lines into the upper field of the new frame */
381 copy_picture_field(tinterlace, out->data, out->linesize,
382 (const uint8_t **)cur->data, cur->linesize,
383 inlink->format, inlink->w, inlink->h,
384 FIELD_UPPER_AND_LOWER, 1, tinterlace->mode == MODE_MERGEX2 ? inlink->frame_count_out & 1 ? FIELD_LOWER : FIELD_UPPER : FIELD_UPPER, tinterlace->flags);
385 /* write even frame lines into the lower field of the new frame */
386 copy_picture_field(tinterlace, out->data, out->linesize,
387 (const uint8_t **)next->data, next->linesize,
388 inlink->format, inlink->w, inlink->h,
389 FIELD_UPPER_AND_LOWER, 1, tinterlace->mode == MODE_MERGEX2 ? inlink->frame_count_out & 1 ? FIELD_UPPER : FIELD_LOWER : FIELD_LOWER, tinterlace->flags);
390 if (tinterlace->mode != MODE_MERGEX2)
391 av_frame_free(&tinterlace->next);
394 case MODE_DROP_ODD: /* only output even frames, odd frames are dropped; height unchanged, half framerate */
395 case MODE_DROP_EVEN: /* only output odd frames, even frames are dropped; height unchanged, half framerate */
396 out = av_frame_clone(tinterlace->mode == MODE_DROP_EVEN ? cur : next);
398 return AVERROR(ENOMEM);
399 av_frame_free(&tinterlace->next);
402 case MODE_PAD: /* expand each frame to double height, but pad alternate
403 * lines with black; framerate unchanged */
404 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
406 return AVERROR(ENOMEM);
407 av_frame_copy_props(out, cur);
408 out->height = outlink->h;
409 out->sample_aspect_ratio = av_mul_q(cur->sample_aspect_ratio, av_make_q(2, 1));
411 field = (1 + tinterlace->frame) & 1 ? FIELD_UPPER : FIELD_LOWER;
412 /* copy upper and lower fields */
413 copy_picture_field(tinterlace, out->data, out->linesize,
414 (const uint8_t **)cur->data, cur->linesize,
415 inlink->format, inlink->w, inlink->h,
416 FIELD_UPPER_AND_LOWER, 1, field, tinterlace->flags);
417 /* pad with black the other field */
418 copy_picture_field(tinterlace, out->data, out->linesize,
419 (const uint8_t **)tinterlace->black_data, tinterlace->black_linesize,
420 inlink->format, inlink->w, inlink->h,
421 FIELD_UPPER_AND_LOWER, 1, !field, tinterlace->flags);
424 /* interleave upper/lower lines from odd frames with lower/upper lines from even frames,
425 * halving the frame rate and preserving image height */
426 case MODE_INTERLEAVE_TOP: /* top field first */
427 case MODE_INTERLEAVE_BOTTOM: /* bottom field first */
428 tff = tinterlace->mode == MODE_INTERLEAVE_TOP;
429 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
431 return AVERROR(ENOMEM);
432 av_frame_copy_props(out, cur);
433 out->interlaced_frame = 1;
434 out->top_field_first = tff;
436 /* copy upper/lower field from cur */
437 copy_picture_field(tinterlace, out->data, out->linesize,
438 (const uint8_t **)cur->data, cur->linesize,
439 inlink->format, inlink->w, inlink->h,
440 tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER,
442 /* copy lower/upper field from next */
443 copy_picture_field(tinterlace, out->data, out->linesize,
444 (const uint8_t **)next->data, next->linesize,
445 inlink->format, inlink->w, inlink->h,
446 tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER,
448 av_frame_free(&tinterlace->next);
450 case MODE_INTERLACEX2: /* re-interlace preserving image height, double frame rate */
451 /* output current frame first */
452 out = av_frame_clone(cur);
454 return AVERROR(ENOMEM);
455 out->interlaced_frame = 1;
456 if (cur->pts != AV_NOPTS_VALUE)
457 out->pts = cur->pts*2;
459 out->pts = av_rescale_q(out->pts, tinterlace->preout_time_base, outlink->time_base);
460 if ((ret = ff_filter_frame(outlink, out)) < 0)
463 /* output mix of current and next frame */
464 tff = next->top_field_first;
465 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
467 return AVERROR(ENOMEM);
468 av_frame_copy_props(out, next);
469 out->interlaced_frame = 1;
470 out->top_field_first = !tff;
472 if (next->pts != AV_NOPTS_VALUE && cur->pts != AV_NOPTS_VALUE)
473 out->pts = cur->pts + next->pts;
475 out->pts = AV_NOPTS_VALUE;
476 /* write current frame second field lines into the second field of the new frame */
477 copy_picture_field(tinterlace, out->data, out->linesize,
478 (const uint8_t **)cur->data, cur->linesize,
479 inlink->format, inlink->w, inlink->h,
480 tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER,
482 /* write next frame first field lines into the first field of the new frame */
483 copy_picture_field(tinterlace, out->data, out->linesize,
484 (const uint8_t **)next->data, next->linesize,
485 inlink->format, inlink->w, inlink->h,
486 tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER,
493 out->pts = av_rescale_q(out->pts, tinterlace->preout_time_base, outlink->time_base);
494 ret = ff_filter_frame(outlink, out);
500 static const AVFilterPad tinterlace_inputs[] = {
503 .type = AVMEDIA_TYPE_VIDEO,
504 .filter_frame = filter_frame,
509 static const AVFilterPad tinterlace_outputs[] = {
512 .type = AVMEDIA_TYPE_VIDEO,
513 .config_props = config_out_props,
518 AVFilter ff_vf_tinterlace = {
519 .name = "tinterlace",
520 .description = NULL_IF_CONFIG_SMALL("Perform temporal field interlacing."),
521 .priv_size = sizeof(TInterlaceContext),
523 .query_formats = query_formats,
524 .inputs = tinterlace_inputs,
525 .outputs = tinterlace_outputs,
526 .priv_class = &tinterlace_class,