FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* Copyright (c) 2015 Himangi Saraogi <himangi774@gmail.com>
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 detelecine filter.
23			*/
24
25
26			#include "libavutil/avstring.h"
27			#include "libavutil/imgutils.h"
28			#include "libavutil/opt.h"
29			#include "libavutil/pixdesc.h"
30			#include "avfilter.h"
31			#include "filters.h"
32			#include "formats.h"
33			#include "video.h"
34
35			typedef struct DetelecineContext {
36			const AVClass *class;
37			int first_field;
38			char *pattern;
39			int start_frame;
40			int init_len;
41			unsigned int pattern_pos;
42			unsigned int nskip_fields;
43			int64_t start_time;
44
45			AVRational pts;
46			AVRational ts_unit;
47			int occupied;
48
49			int nb_planes;
50			int planeheight[4];
51			int stride[4];
52
53			AVFrame *frame[2];
54			AVFrame *temp;
55			} DetelecineContext;
56
57			#define OFFSET(x) offsetof(DetelecineContext, x)
58			#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
59
60			static const AVOption detelecine_options[] = {
61			{"first_field", "select first field", OFFSET(first_field), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, .unit = "field"},
62			{"top", "select top field first", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "field"},
63			{"t", "select top field first", 0, AV_OPT_TYPE_CONST, {.i64=0}, 0, 0, FLAGS, .unit = "field"},
64			{"bottom", "select bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "field"},
65			{"b", "select bottom field first", 0, AV_OPT_TYPE_CONST, {.i64=1}, 0, 0, FLAGS, .unit = "field"},
66			{"pattern", "pattern that describe for how many fields a frame is to be displayed", OFFSET(pattern), AV_OPT_TYPE_STRING, {.str="23"}, 0, 0, FLAGS},
67			{"start_frame", "position of first frame with respect to the pattern if stream is cut", OFFSET(start_frame), AV_OPT_TYPE_INT, {.i64=0}, 0, 13, FLAGS},
68			{NULL}
69			};
70
71			AVFILTER_DEFINE_CLASS(detelecine);
72
73		✗	static av_cold int init(AVFilterContext *ctx)
74			{
75		✗	DetelecineContext *s = ctx->priv;
76			const char *p;
77		✗	int max = 0;
78		✗	int sum = 0;
79
80		✗	if (!strlen(s->pattern)) {
81		✗	av_log(ctx, AV_LOG_ERROR, "No pattern provided.\n");
82		✗	return AVERROR_INVALIDDATA;
83			}
84
85		✗	for (p = s->pattern; *p; p++) {
86		✗	if (!av_isdigit(*p)) {
87		✗	av_log(ctx, AV_LOG_ERROR, "Provided pattern includes non-numeric characters.\n");
88		✗	return AVERROR_INVALIDDATA;
89			}
90
91		✗	sum += *p - '0';
92		✗	max = FFMAX(*p - '0', max);
93		✗	s->pts.num += *p - '0';
94		✗	s->pts.den += 2;
95			}
96
97		✗	if (s->start_frame >= sum) {
98		✗	av_log(ctx, AV_LOG_ERROR, "Provided start_frame is too big.\n");
99		✗	return AVERROR_INVALIDDATA;
100			}
101
102		✗	s->nskip_fields = 0;
103		✗	s->pattern_pos = 0;
104		✗	s->start_time = AV_NOPTS_VALUE;
105		✗	s->init_len = 0;
106
107		✗	if (s->start_frame != 0) {
108		✗	int nfields = 0;
109		✗	for (p = s->pattern; *p; p++) {
110		✗	nfields += *p - '0';
111		✗	s->pattern_pos++;
112		✗	if (nfields >= 2*s->start_frame) {
113		✗	s->init_len = nfields - 2*s->start_frame;
114		✗	break;
115			}
116			}
117			}
118
119		✗	av_log(ctx, AV_LOG_INFO, "Detelecine pattern %s removes up to %d frames per frame, pts advance factor: %d/%d\n",
120		✗	s->pattern, (max + 1) / 2, s->pts.num, s->pts.den);
121
122		✗	return 0;
123			}
124
125		✗	static int query_formats(const AVFilterContext *ctx,
126			AVFilterFormatsConfig **cfg_in,
127			AVFilterFormatsConfig **cfg_out)
128			{
129		✗	int reject_flags = AV_PIX_FMT_FLAG_BITSTREAM |
130			AV_PIX_FMT_FLAG_PAL |
131			AV_PIX_FMT_FLAG_HWACCEL;
132
133		✗	return ff_set_common_formats2(ctx, cfg_in, cfg_out,
134			ff_formats_pixdesc_filter(0, reject_flags));
135			}
136
137		✗	static int config_input(AVFilterLink *inlink)
138			{
139		✗	DetelecineContext *s = inlink->dst->priv;
140		✗	const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
141			int ret;
142
143		✗	s->temp = ff_get_video_buffer(inlink, inlink->w, inlink->h);
144		✗	if (!s->temp)
145		✗	return AVERROR(ENOMEM);
146
147		✗	s->frame[0] = ff_get_video_buffer(inlink, inlink->w, inlink->h);
148		✗	if (!s->frame[0])
149		✗	return AVERROR(ENOMEM);
150
151		✗	s->frame[1] = ff_get_video_buffer(inlink, inlink->w, inlink->h);
152		✗	if (!s->frame[1])
153		✗	return AVERROR(ENOMEM);
154
155		✗	if ((ret = av_image_fill_linesizes(s->stride, inlink->format, inlink->w)) < 0)
156		✗	return ret;
157
158		✗	s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
159		✗	s->planeheight[0] = s->planeheight[3] = inlink->h;
160
161		✗	s->nb_planes = av_pix_fmt_count_planes(inlink->format);
162
163		✗	return 0;
164			}
165
166		✗	static int config_output(AVFilterLink *outlink)
167			{
168		✗	FilterLink *outl = ff_filter_link(outlink);
169		✗	AVFilterContext *ctx = outlink->src;
170		✗	DetelecineContext *s = ctx->priv;
171		✗	const AVFilterLink *inlink = ctx->inputs[0];
172		✗	const FilterLink *inl = ff_filter_link(ctx->inputs[0]);
173		✗	AVRational fps = inl->frame_rate;
174
175		✗	if (!fps.num || !fps.den) {
176		✗	av_log(ctx, AV_LOG_ERROR, "The input needs a constant frame rate; "
177			"current rate of %d/%d is invalid\n", fps.num, fps.den);
178		✗	return AVERROR(EINVAL);
179			}
180		✗	fps = av_mul_q(fps, av_inv_q(s->pts));
181		✗	av_log(ctx, AV_LOG_VERBOSE, "FPS: %d/%d -> %d/%d\n",
182		✗	inl->frame_rate.num, inl->frame_rate.den, fps.num, fps.den);
183
184		✗	outl->frame_rate = fps;
185		✗	outlink->time_base = av_mul_q(inlink->time_base, s->pts);
186		✗	av_log(ctx, AV_LOG_VERBOSE, "TB: %d/%d -> %d/%d\n",
187		✗	inlink->time_base.num, inlink->time_base.den, outlink->time_base.num, outlink->time_base.den);
188
189		✗	s->ts_unit = av_inv_q(av_mul_q(fps, outlink->time_base));
190
191		✗	return 0;
192			}
193
194		✗	static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
195			{
196		✗	AVFilterContext *ctx = inlink->dst;
197		✗	AVFilterLink *outlink = ctx->outputs[0];
198		✗	FilterLink *outl = ff_filter_link(outlink);
199		✗	DetelecineContext *s = ctx->priv;
200		✗	int i, len = 0, ret = 0, out = 0;
201
202		✗	if (s->start_time == AV_NOPTS_VALUE)
203		✗	s->start_time = inpicref->pts;
204
205		✗	if (s->nskip_fields >= 2) {
206		✗	s->nskip_fields -= 2;
207		✗	av_frame_free(&inpicref);
208		✗	return 0;
209		✗	} else if (s->nskip_fields >= 1) {
210		✗	for (i = 0; i < s->nb_planes; i++) {
211		✗	av_image_copy_plane(s->temp->data[i], s->temp->linesize[i],
212		✗	inpicref->data[i], inpicref->linesize[i],
213			s->stride[i],
214			s->planeheight[i]);
215			}
216		✗	s->occupied = 1;
217		✗	s->nskip_fields--;
218		✗	av_frame_free(&inpicref);
219		✗	return 0;
220			}
221
222		✗	if (s->nskip_fields == 0) {
223		✗	len = s->init_len;
224		✗	s->init_len = 0;
225		✗	while(!len && s->pattern[s->pattern_pos]) {
226		✗	len = s->pattern[s->pattern_pos] - '0';
227		✗	s->pattern_pos++;
228			}
229
230		✗	if (!s->pattern[s->pattern_pos])
231		✗	s->pattern_pos = 0;
232
233		✗	if(!len) { // do not output any field as the entire pattern is zero
234		✗	av_frame_free(&inpicref);
235		✗	return 0;
236			}
237
238		✗	if (len == 1 && s->occupied) {
239		✗	s->occupied = 0;
240			// output THIS image as-is
241		✗	for (i = 0; i < s->nb_planes; i++)
242		✗	av_image_copy_plane(s->frame[out]->data[i], s->frame[out]->linesize[i],
243		✗	s->temp->data[i], s->temp->linesize[i],
244			s->stride[i],
245			s->planeheight[i]);
246		✗	len = 0;
247		✗	while(!len && s->pattern[s->pattern_pos]) {
248		✗	len = s->pattern[s->pattern_pos] - '0';
249		✗	s->pattern_pos++;
250			}
251
252		✗	if (!s->pattern[s->pattern_pos])
253		✗	s->pattern_pos = 0;
254
255		✗	s->occupied = 0;
256		✗	++out;
257			}
258
259		✗	if (s->occupied) {
260		✗	for (i = 0; i < s->nb_planes; i++) {
261			// fill in the EARLIER field from the new pic
262		✗	av_image_copy_plane(s->frame[out]->data[i] + s->frame[out]->linesize[i] * s->first_field,
263		✗	s->frame[out]->linesize[i] * 2,
264		✗	inpicref->data[i] + inpicref->linesize[i] * s->first_field,
265		✗	inpicref->linesize[i] * 2,
266			s->stride[i],
267		✗	(s->planeheight[i] - s->first_field + 1) / 2);
268			// fill in the LATER field from the buffered pic
269		✗	av_image_copy_plane(s->frame[out]->data[i] + s->frame[out]->linesize[i] * !s->first_field,
270		✗	s->frame[out]->linesize[i] * 2,
271		✗	s->temp->data[i] + s->temp->linesize[i] * !s->first_field,
272		✗	s->temp->linesize[i] * 2,
273			s->stride[i],
274		✗	(s->planeheight[i] - !s->first_field + 1) / 2);
275			}
276
277		✗	s->occupied = 0;
278		✗	if (len <= 2) {
279		✗	for (i = 0; i < s->nb_planes; i++) {
280		✗	av_image_copy_plane(s->temp->data[i], s->temp->linesize[i],
281		✗	inpicref->data[i], inpicref->linesize[i],
282			s->stride[i],
283			s->planeheight[i]);
284			}
285		✗	s->occupied = 1;
286			}
287		✗	++out;
288		✗	len = (len >= 3) ? len - 3 : 0;
289			} else {
290		✗	if (len >= 2) {
291			// output THIS image as-is
292		✗	for (i = 0; i < s->nb_planes; i++)
293		✗	av_image_copy_plane(s->frame[out]->data[i], s->frame[out]->linesize[i],
294		✗	inpicref->data[i], inpicref->linesize[i],
295			s->stride[i],
296			s->planeheight[i]);
297		✗	len -= 2;
298		✗	++out;
299		✗	} else if (len == 1) {
300			// output THIS image as-is
301		✗	for (i = 0; i < s->nb_planes; i++)
302		✗	av_image_copy_plane(s->frame[out]->data[i], s->frame[out]->linesize[i],
303		✗	inpicref->data[i], inpicref->linesize[i],
304			s->stride[i],
305			s->planeheight[i]);
306
307		✗	for (i = 0; i < s->nb_planes; i++) {
308		✗	av_image_copy_plane(s->temp->data[i], s->temp->linesize[i],
309		✗	inpicref->data[i], inpicref->linesize[i],
310			s->stride[i],
311			s->planeheight[i]);
312			}
313		✗	s->occupied = 1;
314
315		✗	len--;
316		✗	++out;
317			}
318			}
319
320		✗	if (len == 1 && s->occupied)
321			{
322		✗	len--;
323		✗	s->occupied = 0;
324			}
325			}
326		✗	s->nskip_fields = len;
327
328		✗	for (i = 0; i < out; ++i) {
329		✗	AVFrame *frame = av_frame_clone(s->frame[i]);
330
331		✗	if (!frame) {
332		✗	av_frame_free(&inpicref);
333		✗	return AVERROR(ENOMEM);
334			}
335
336		✗	av_frame_copy_props(frame, inpicref);
337		✗	frame->pts = ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time) +
338		✗	av_rescale(outl->frame_count_in, s->ts_unit.num,
339		✗	s->ts_unit.den);
340		✗	ret = ff_filter_frame(outlink, frame);
341			}
342
343		✗	av_frame_free(&inpicref);
344
345		✗	return ret;
346			}
347
348		✗	static av_cold void uninit(AVFilterContext *ctx)
349			{
350		✗	DetelecineContext *s = ctx->priv;
351
352		✗	av_frame_free(&s->temp);
353		✗	av_frame_free(&s->frame[0]);
354		✗	av_frame_free(&s->frame[1]);
355		✗	}
356
357			static const AVFilterPad detelecine_inputs[] = {
358			{
359			.name = "default",
360			.type = AVMEDIA_TYPE_VIDEO,
361			.filter_frame = filter_frame,
362			.config_props = config_input,
363			},
364			};
365
366			static const AVFilterPad detelecine_outputs[] = {
367			{
368			.name = "default",
369			.type = AVMEDIA_TYPE_VIDEO,
370			.config_props = config_output,
371			},
372			};
373
374			const FFFilter ff_vf_detelecine = {
375			.p.name = "detelecine",
376			.p.description = NULL_IF_CONFIG_SMALL("Apply an inverse telecine pattern."),
377			.p.priv_class = &detelecine_class,
378			.priv_size = sizeof(DetelecineContext),
379			.init = init,
380			.uninit = uninit,
381			FILTER_INPUTS(detelecine_inputs),
382			FILTER_OUTPUTS(detelecine_outputs),
383			FILTER_QUERY_FUNC2(query_formats),
384			};
385