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 static const AVOption interlace_options[] = {
63 { "scan", "scanning mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64 = MODE_TFF}, 0, 1, FLAGS, "mode"},
64 { "tff", "top field first", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_TFF}, INT_MIN, INT_MAX, FLAGS, .unit = "mode"},
65 { "bff", "bottom field first", 0, AV_OPT_TYPE_CONST, {.i64 = MODE_BFF}, INT_MIN, INT_MAX, FLAGS, .unit = "mode"},
66 { "lowpass", "set vertical low-pass filter", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = TINTERLACE_FLAG_VLPF}, 0, 2, 0, "flags" },
67 { "off", "disable vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = 0}, INT_MIN, INT_MAX, FLAGS, "flags" },
68 { "linear", "linear vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_VLPF}, INT_MIN, INT_MAX, FLAGS, "flags" },
69 { "complex", "complex vertical low-pass filter", 0, AV_OPT_TYPE_CONST, {.i64 = TINTERLACE_FLAG_CVLPF},INT_MIN, INT_MAX, FLAGS, "flags" },
74 AVFILTER_DEFINE_CLASS(interlace);
76 #define FULL_SCALE_YUVJ_FORMATS \
77 AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P
79 static const enum AVPixelFormat full_scale_yuvj_pix_fmts[] = {
80 FULL_SCALE_YUVJ_FORMATS, AV_PIX_FMT_NONE
83 static const AVRational standard_tbs[] = {
89 static int query_formats(AVFilterContext *ctx)
91 static const enum AVPixelFormat pix_fmts[] = {
92 AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P,
93 AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P,
94 AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P,
95 AV_PIX_FMT_YUV420P10LE, AV_PIX_FMT_YUV422P10LE,
96 AV_PIX_FMT_YUV440P10LE, AV_PIX_FMT_YUV444P10LE,
97 AV_PIX_FMT_YUV420P12LE, AV_PIX_FMT_YUV422P12LE,
98 AV_PIX_FMT_YUV440P12LE, AV_PIX_FMT_YUV444P12LE,
99 AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P,
100 AV_PIX_FMT_YUVA420P10LE, AV_PIX_FMT_YUVA422P10LE, AV_PIX_FMT_YUVA444P10LE,
101 AV_PIX_FMT_GRAY8, FULL_SCALE_YUVJ_FORMATS,
105 AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
107 return AVERROR(ENOMEM);
108 return ff_set_common_formats(ctx, fmts_list);
111 static void lowpass_line_c(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp,
112 ptrdiff_t mref, ptrdiff_t pref, int clip_max)
114 const uint8_t *srcp_above = srcp + mref;
115 const uint8_t *srcp_below = srcp + pref;
117 for (i = 0; i < width; i++) {
118 // this calculation is an integer representation of
119 // '0.5 * current + 0.25 * above + 0.25 * below'
120 // '1 +' is for rounding.
121 dstp[i] = (1 + srcp[i] + srcp[i] + srcp_above[i] + srcp_below[i]) >> 2;
125 static void lowpass_line_c_16(uint8_t *dst8, ptrdiff_t width, const uint8_t *src8,
126 ptrdiff_t mref, ptrdiff_t pref, int clip_max)
128 uint16_t *dstp = (uint16_t *)dst8;
129 const uint16_t *srcp = (const uint16_t *)src8;
130 const uint16_t *srcp_above = srcp + mref / 2;
131 const uint16_t *srcp_below = srcp + pref / 2;
133 for (i = 0; i < width; i++) {
134 // this calculation is an integer representation of
135 // '0.5 * current + 0.25 * above + 0.25 * below'
136 // '1 +' is for rounding.
137 src_x = av_le2ne16(srcp[i]) << 1;
138 dstp[i] = av_le2ne16((1 + src_x + av_le2ne16(srcp_above[i])
139 + av_le2ne16(srcp_below[i])) >> 2);
143 static void lowpass_line_complex_c(uint8_t *dstp, ptrdiff_t width, const uint8_t *srcp,
144 ptrdiff_t mref, ptrdiff_t pref, int clip_max)
146 const uint8_t *srcp_above = srcp + mref;
147 const uint8_t *srcp_below = srcp + pref;
148 const uint8_t *srcp_above2 = srcp + mref * 2;
149 const uint8_t *srcp_below2 = srcp + pref * 2;
150 int i, src_x, src_ab;
151 for (i = 0; i < width; i++) {
152 // this calculation is an integer representation of
153 // '0.75 * current + 0.25 * above + 0.25 * below - 0.125 * above2 - 0.125 * below2'
154 // '4 +' is for rounding.
155 src_x = srcp[i] << 1;
156 src_ab = srcp_above[i] + srcp_below[i];
157 dstp[i] = av_clip_uint8((4 + ((srcp[i] + src_x + src_ab) << 1)
158 - srcp_above2[i] - srcp_below2[i]) >> 3);
159 // Prevent over-sharpening:
160 // dst must not exceed src when the average of above and below
161 // is less than src. And the other way around.
162 if (src_ab > src_x) {
163 if (dstp[i] < srcp[i])
165 } else if (dstp[i] > srcp[i])
170 static void lowpass_line_complex_c_16(uint8_t *dst8, ptrdiff_t width, const uint8_t *src8,
171 ptrdiff_t mref, ptrdiff_t pref, int clip_max)
173 uint16_t *dstp = (uint16_t *)dst8;
174 const uint16_t *srcp = (const uint16_t *)src8;
175 const uint16_t *srcp_above = srcp + mref / 2;
176 const uint16_t *srcp_below = srcp + pref / 2;
177 const uint16_t *srcp_above2 = srcp + mref;
178 const uint16_t *srcp_below2 = srcp + pref;
179 int i, dst_le, src_le, src_x, src_ab;
180 for (i = 0; i < width; i++) {
181 // this calculation is an integer representation of
182 // '0.75 * current + 0.25 * above + 0.25 * below - 0.125 * above2 - 0.125 * below2'
183 // '4 +' is for rounding.
184 src_le = av_le2ne16(srcp[i]);
186 src_ab = av_le2ne16(srcp_above[i]) + av_le2ne16(srcp_below[i]);
187 dst_le = av_clip((4 + ((src_le + src_x + src_ab) << 1)
188 - av_le2ne16(srcp_above2[i])
189 - av_le2ne16(srcp_below2[i])) >> 3, 0, clip_max);
190 // Prevent over-sharpening:
191 // dst must not exceed src when the average of above and below
192 // is less than src. And the other way around.
193 if (src_ab > src_x) {
195 dstp[i] = av_le2ne16(src_le);
197 dstp[i] = av_le2ne16(dst_le);
198 } else if (dst_le > src_le) {
199 dstp[i] = av_le2ne16(src_le);
201 dstp[i] = av_le2ne16(dst_le);
205 static av_cold void uninit(AVFilterContext *ctx)
207 TInterlaceContext *tinterlace = ctx->priv;
209 av_frame_free(&tinterlace->cur );
210 av_frame_free(&tinterlace->next);
211 av_freep(&tinterlace->black_data[0]);
214 static int config_out_props(AVFilterLink *outlink)
216 AVFilterContext *ctx = outlink->src;
217 AVFilterLink *inlink = outlink->src->inputs[0];
218 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format);
219 TInterlaceContext *tinterlace = ctx->priv;
222 tinterlace->vsub = desc->log2_chroma_h;
223 outlink->w = inlink->w;
224 outlink->h = tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD || tinterlace->mode == MODE_MERGEX2?
225 inlink->h*2 : inlink->h;
226 if (tinterlace->mode == MODE_MERGE || tinterlace->mode == MODE_PAD || tinterlace->mode == MODE_MERGEX2)
227 outlink->sample_aspect_ratio = av_mul_q(inlink->sample_aspect_ratio,
230 if (tinterlace->mode == MODE_PAD) {
231 uint8_t black[4] = { 0, 0, 0, 16 };
233 ff_draw_init(&tinterlace->draw, outlink->format, 0);
234 ff_draw_color(&tinterlace->draw, &tinterlace->color, black);
235 if (ff_fmt_is_in(outlink->format, full_scale_yuvj_pix_fmts))
236 tinterlace->color.comp[0].u8[0] = 0;
237 ret = av_image_alloc(tinterlace->black_data, tinterlace->black_linesize,
238 outlink->w, outlink->h, outlink->format, 16);
242 ff_fill_rectangle(&tinterlace->draw, &tinterlace->color, tinterlace->black_data,
243 tinterlace->black_linesize, 0, 0, outlink->w, outlink->h);
245 if (tinterlace->flags & (TINTERLACE_FLAG_VLPF | TINTERLACE_FLAG_CVLPF)
246 && !(tinterlace->mode == MODE_INTERLEAVE_TOP
247 || tinterlace->mode == MODE_INTERLEAVE_BOTTOM)) {
248 av_log(ctx, AV_LOG_WARNING, "low_pass_filter flags ignored with mode %d\n",
250 tinterlace->flags &= ~(TINTERLACE_FLAG_VLPF | TINTERLACE_FLAG_CVLPF);
252 tinterlace->preout_time_base = inlink->time_base;
253 if (tinterlace->mode == MODE_INTERLACEX2) {
254 tinterlace->preout_time_base.den *= 2;
255 outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){2,1});
256 outlink->time_base = av_mul_q(inlink->time_base , (AVRational){1,2});
257 } else if (tinterlace->mode == MODE_MERGEX2) {
258 outlink->frame_rate = inlink->frame_rate;
259 outlink->time_base = inlink->time_base;
260 } else if (tinterlace->mode != MODE_PAD) {
261 outlink->frame_rate = av_mul_q(inlink->frame_rate, (AVRational){1,2});
262 outlink->time_base = av_mul_q(inlink->time_base , (AVRational){2,1});
265 for (i = 0; i<FF_ARRAY_ELEMS(standard_tbs); i++){
266 if (!av_cmp_q(standard_tbs[i], outlink->time_base))
269 if (i == FF_ARRAY_ELEMS(standard_tbs) ||
270 (tinterlace->flags & TINTERLACE_FLAG_EXACT_TB))
271 outlink->time_base = tinterlace->preout_time_base;
273 tinterlace->csp = av_pix_fmt_desc_get(outlink->format);
274 if (tinterlace->flags & TINTERLACE_FLAG_CVLPF) {
275 if (tinterlace->csp->comp[0].depth > 8)
276 tinterlace->lowpass_line = lowpass_line_complex_c_16;
278 tinterlace->lowpass_line = lowpass_line_complex_c;
280 ff_tinterlace_init_x86(tinterlace);
281 } else if (tinterlace->flags & TINTERLACE_FLAG_VLPF) {
282 if (tinterlace->csp->comp[0].depth > 8)
283 tinterlace->lowpass_line = lowpass_line_c_16;
285 tinterlace->lowpass_line = lowpass_line_c;
287 ff_tinterlace_init_x86(tinterlace);
290 av_log(ctx, AV_LOG_VERBOSE, "mode:%d filter:%s h:%d -> h:%d\n", tinterlace->mode,
291 (tinterlace->flags & TINTERLACE_FLAG_CVLPF) ? "complex" :
292 (tinterlace->flags & TINTERLACE_FLAG_VLPF) ? "linear" : "off",
293 inlink->h, outlink->h);
298 #define FIELD_UPPER 0
299 #define FIELD_LOWER 1
300 #define FIELD_UPPER_AND_LOWER 2
303 * Copy picture field from src to dst.
305 * @param src_field copy from upper, lower field or both
306 * @param interleave leave a padding line between each copied line
307 * @param dst_field copy to upper or lower field,
308 * only meaningful when interleave is selected
309 * @param flags context flags
312 void copy_picture_field(TInterlaceContext *tinterlace,
313 uint8_t *dst[4], int dst_linesize[4],
314 const uint8_t *src[4], int src_linesize[4],
315 enum AVPixelFormat format, int w, int src_h,
316 int src_field, int interleave, int dst_field,
319 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(format);
320 int hsub = desc->log2_chroma_w;
321 int plane, vsub = desc->log2_chroma_h;
322 int k = src_field == FIELD_UPPER_AND_LOWER ? 1 : 2;
325 for (plane = 0; plane < desc->nb_components; plane++) {
326 int lines = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT(src_h, vsub) : src_h;
327 int cols = plane == 1 || plane == 2 ? AV_CEIL_RSHIFT( w, hsub) : w;
328 uint8_t *dstp = dst[plane];
329 const uint8_t *srcp = src[plane];
330 int srcp_linesize = src_linesize[plane] * k;
331 int dstp_linesize = dst_linesize[plane] * (interleave ? 2 : 1);
332 int clip_max = (1 << tinterlace->csp->comp[plane].depth) - 1;
334 lines = (lines + (src_field == FIELD_UPPER)) / k;
335 if (src_field == FIELD_LOWER)
336 srcp += src_linesize[plane];
337 if (interleave && dst_field == FIELD_LOWER)
338 dstp += dst_linesize[plane];
339 // Low-pass filtering is required when creating an interlaced destination from
340 // a progressive source which contains high-frequency vertical detail.
341 // Filtering will reduce interlace 'twitter' and Moire patterning.
342 if (flags & (TINTERLACE_FLAG_VLPF | TINTERLACE_FLAG_CVLPF)) {
343 int x = !!(flags & TINTERLACE_FLAG_CVLPF);
344 for (h = lines; h > 0; h--) {
345 ptrdiff_t pref = src_linesize[plane];
346 ptrdiff_t mref = -pref;
347 if (h >= (lines - x)) mref = 0; // there is no line above
348 else if (h <= (1 + x)) pref = 0; // there is no line below
350 tinterlace->lowpass_line(dstp, cols, srcp, mref, pref, clip_max);
351 dstp += dstp_linesize;
352 srcp += srcp_linesize;
355 if (tinterlace->csp->comp[plane].depth > 8)
357 av_image_copy_plane(dstp, dstp_linesize, srcp, srcp_linesize, cols, lines);
362 static int filter_frame(AVFilterLink *inlink, AVFrame *picref)
364 AVFilterContext *ctx = inlink->dst;
365 AVFilterLink *outlink = ctx->outputs[0];
366 TInterlaceContext *tinterlace = ctx->priv;
367 AVFrame *cur, *next, *out;
370 av_frame_free(&tinterlace->cur);
371 tinterlace->cur = tinterlace->next;
372 tinterlace->next = picref;
374 cur = tinterlace->cur;
375 next = tinterlace->next;
376 /* we need at least two frames */
377 if (!tinterlace->cur)
380 switch (tinterlace->mode) {
381 case MODE_MERGEX2: /* move the odd frame into the upper field of the new image, even into
382 * the lower field, generating a double-height video at same framerate */
383 case MODE_MERGE: /* move the odd frame into the upper field of the new image, even into
384 * the lower field, generating a double-height video at half framerate */
385 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
387 return AVERROR(ENOMEM);
388 av_frame_copy_props(out, cur);
389 out->height = outlink->h;
390 out->interlaced_frame = 1;
391 out->top_field_first = 1;
392 out->sample_aspect_ratio = av_mul_q(cur->sample_aspect_ratio, av_make_q(2, 1));
394 /* write odd frame lines into the upper field of the new frame */
395 copy_picture_field(tinterlace, out->data, out->linesize,
396 (const uint8_t **)cur->data, cur->linesize,
397 inlink->format, inlink->w, inlink->h,
398 FIELD_UPPER_AND_LOWER, 1, tinterlace->mode == MODE_MERGEX2 ? inlink->frame_count_out & 1 ? FIELD_LOWER : FIELD_UPPER : FIELD_UPPER, tinterlace->flags);
399 /* write even frame lines into the lower field of the new frame */
400 copy_picture_field(tinterlace, out->data, out->linesize,
401 (const uint8_t **)next->data, next->linesize,
402 inlink->format, inlink->w, inlink->h,
403 FIELD_UPPER_AND_LOWER, 1, tinterlace->mode == MODE_MERGEX2 ? inlink->frame_count_out & 1 ? FIELD_UPPER : FIELD_LOWER : FIELD_LOWER, tinterlace->flags);
404 if (tinterlace->mode != MODE_MERGEX2)
405 av_frame_free(&tinterlace->next);
408 case MODE_DROP_ODD: /* only output even frames, odd frames are dropped; height unchanged, half framerate */
409 case MODE_DROP_EVEN: /* only output odd frames, even frames are dropped; height unchanged, half framerate */
410 out = av_frame_clone(tinterlace->mode == MODE_DROP_EVEN ? cur : next);
412 return AVERROR(ENOMEM);
413 av_frame_free(&tinterlace->next);
416 case MODE_PAD: /* expand each frame to double height, but pad alternate
417 * lines with black; framerate unchanged */
418 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
420 return AVERROR(ENOMEM);
421 av_frame_copy_props(out, cur);
422 out->height = outlink->h;
423 out->sample_aspect_ratio = av_mul_q(cur->sample_aspect_ratio, av_make_q(2, 1));
425 field = (1 + tinterlace->frame) & 1 ? FIELD_UPPER : FIELD_LOWER;
426 /* copy upper and lower fields */
427 copy_picture_field(tinterlace, out->data, out->linesize,
428 (const uint8_t **)cur->data, cur->linesize,
429 inlink->format, inlink->w, inlink->h,
430 FIELD_UPPER_AND_LOWER, 1, field, tinterlace->flags);
431 /* pad with black the other field */
432 copy_picture_field(tinterlace, out->data, out->linesize,
433 (const uint8_t **)tinterlace->black_data, tinterlace->black_linesize,
434 inlink->format, inlink->w, inlink->h,
435 FIELD_UPPER_AND_LOWER, 1, !field, tinterlace->flags);
438 /* interleave upper/lower lines from odd frames with lower/upper lines from even frames,
439 * halving the frame rate and preserving image height */
440 case MODE_INTERLEAVE_TOP: /* top field first */
441 case MODE_INTERLEAVE_BOTTOM: /* bottom field first */
442 tff = tinterlace->mode == MODE_INTERLEAVE_TOP;
443 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
445 return AVERROR(ENOMEM);
446 av_frame_copy_props(out, cur);
447 out->interlaced_frame = 1;
448 out->top_field_first = tff;
450 /* copy upper/lower field from cur */
451 copy_picture_field(tinterlace, out->data, out->linesize,
452 (const uint8_t **)cur->data, cur->linesize,
453 inlink->format, inlink->w, inlink->h,
454 tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER,
456 /* copy lower/upper field from next */
457 copy_picture_field(tinterlace, out->data, out->linesize,
458 (const uint8_t **)next->data, next->linesize,
459 inlink->format, inlink->w, inlink->h,
460 tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER,
462 av_frame_free(&tinterlace->next);
464 case MODE_INTERLACEX2: /* re-interlace preserving image height, double frame rate */
465 /* output current frame first */
466 out = av_frame_clone(cur);
468 return AVERROR(ENOMEM);
469 out->interlaced_frame = 1;
470 if (cur->pts != AV_NOPTS_VALUE)
471 out->pts = cur->pts*2;
473 out->pts = av_rescale_q(out->pts, tinterlace->preout_time_base, outlink->time_base);
474 if ((ret = ff_filter_frame(outlink, out)) < 0)
477 /* output mix of current and next frame */
478 tff = next->top_field_first;
479 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
481 return AVERROR(ENOMEM);
482 av_frame_copy_props(out, next);
483 out->interlaced_frame = 1;
484 out->top_field_first = !tff;
486 if (next->pts != AV_NOPTS_VALUE && cur->pts != AV_NOPTS_VALUE)
487 out->pts = cur->pts + next->pts;
489 out->pts = AV_NOPTS_VALUE;
490 /* write current frame second field lines into the second field of the new frame */
491 copy_picture_field(tinterlace, out->data, out->linesize,
492 (const uint8_t **)cur->data, cur->linesize,
493 inlink->format, inlink->w, inlink->h,
494 tff ? FIELD_LOWER : FIELD_UPPER, 1, tff ? FIELD_LOWER : FIELD_UPPER,
496 /* write next frame first field lines into the first field of the new frame */
497 copy_picture_field(tinterlace, out->data, out->linesize,
498 (const uint8_t **)next->data, next->linesize,
499 inlink->format, inlink->w, inlink->h,
500 tff ? FIELD_UPPER : FIELD_LOWER, 1, tff ? FIELD_UPPER : FIELD_LOWER,
507 out->pts = av_rescale_q(out->pts, tinterlace->preout_time_base, outlink->time_base);
508 ret = ff_filter_frame(outlink, out);
514 static int init_interlace(AVFilterContext *ctx)
516 TInterlaceContext *tinterlace = ctx->priv;
518 if (tinterlace->mode <= MODE_BFF)
519 tinterlace->mode += MODE_INTERLEAVE_TOP;
524 static const AVFilterPad tinterlace_inputs[] = {
527 .type = AVMEDIA_TYPE_VIDEO,
528 .filter_frame = filter_frame,
533 static const AVFilterPad tinterlace_outputs[] = {
536 .type = AVMEDIA_TYPE_VIDEO,
537 .config_props = config_out_props,
542 AVFilter ff_vf_tinterlace = {
543 .name = "tinterlace",
544 .description = NULL_IF_CONFIG_SMALL("Perform temporal field interlacing."),
545 .priv_size = sizeof(TInterlaceContext),
547 .query_formats = query_formats,
548 .inputs = tinterlace_inputs,
549 .outputs = tinterlace_outputs,
550 .priv_class = &tinterlace_class,
554 AVFilter ff_vf_interlace = {
556 .description = NULL_IF_CONFIG_SMALL("Convert progressive video into interlaced."),
557 .priv_size = sizeof(TInterlaceContext),
558 .init = init_interlace,
560 .query_formats = query_formats,
561 .inputs = tinterlace_inputs,
562 .outputs = tinterlace_outputs,
563 .priv_class = &interlace_class,