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1 | /* | ||
2 | * This file is part of FFmpeg. | ||
3 | * | ||
4 | * FFmpeg is free software; you can redistribute it and/or | ||
5 | * modify it under the terms of the GNU Lesser General Public | ||
6 | * License as published by the Free Software Foundation; either | ||
7 | * version 2.1 of the License, or (at your option) any later version. | ||
8 | * | ||
9 | * FFmpeg is distributed in the hope that it will be useful, | ||
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
12 | * Lesser General Public License for more details. | ||
13 | * | ||
14 | * You should have received a copy of the GNU Lesser General Public | ||
15 | * License along with FFmpeg; if not, write to the Free Software | ||
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
17 | */ | ||
18 | |||
19 | #include <stdint.h> | ||
20 | |||
21 | #include "config.h" | ||
22 | #include "config_components.h" | ||
23 | |||
24 | #include "libavutil/channel_layout.h" | ||
25 | #include "libavutil/common.h" | ||
26 | #include "libavutil/log.h" | ||
27 | #include "libavutil/mathematics.h" | ||
28 | #include "libavutil/opt.h" | ||
29 | #include "libavutil/samplefmt.h" | ||
30 | |||
31 | #include "audio.h" | ||
32 | #include "avfilter.h" | ||
33 | #include "internal.h" | ||
34 | #include "filters.h" | ||
35 | #include "video.h" | ||
36 | |||
37 | typedef struct TrimContext { | ||
38 | const AVClass *class; | ||
39 | |||
40 | /* | ||
41 | * AVOptions | ||
42 | */ | ||
43 | int64_t duration; | ||
44 | int64_t start_time, end_time; | ||
45 | int64_t start_frame, end_frame; | ||
46 | /* | ||
47 | * in the link timebase for video, | ||
48 | * in 1/samplerate for audio | ||
49 | */ | ||
50 | int64_t start_pts, end_pts; | ||
51 | int64_t start_sample, end_sample; | ||
52 | |||
53 | /* | ||
54 | * number of video frames that arrived on this filter so far | ||
55 | */ | ||
56 | int64_t nb_frames; | ||
57 | /* | ||
58 | * number of audio samples that arrived on this filter so far | ||
59 | */ | ||
60 | int64_t nb_samples; | ||
61 | /* | ||
62 | * timestamp of the first frame in the output, in the timebase units | ||
63 | */ | ||
64 | int64_t first_pts; | ||
65 | /* | ||
66 | * duration in the timebase units | ||
67 | */ | ||
68 | int64_t duration_tb; | ||
69 | |||
70 | int64_t next_pts; | ||
71 | |||
72 | int eof; | ||
73 | |||
74 | int (*filter_frame)(AVFilterLink *inlink, AVFrame *frame); | ||
75 | } TrimContext; | ||
76 | |||
77 | 918 | static av_cold int init(AVFilterContext *ctx) | |
78 | { | ||
79 | 918 | TrimContext *s = ctx->priv; | |
80 | |||
81 | 918 | s->first_pts = AV_NOPTS_VALUE; | |
82 | |||
83 | 918 | return 0; | |
84 | } | ||
85 | |||
86 | #if CONFIG_TRIM_FILTER | ||
87 | 3957 | static int trim_filter_frame(AVFilterLink *inlink, AVFrame *frame) | |
88 | { | ||
89 | 3957 | AVFilterContext *ctx = inlink->dst; | |
90 | 3957 | TrimContext *s = ctx->priv; | |
91 | int drop; | ||
92 | |||
93 | /* drop everything if EOF has already been returned */ | ||
94 |
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3957 | if (s->eof) { |
95 | ✗ | av_frame_free(&frame); | |
96 | ✗ | return 0; | |
97 | } | ||
98 | |||
99 |
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3957 | if (s->start_frame >= 0 || s->start_pts != AV_NOPTS_VALUE) { |
100 | 177 | drop = 1; | |
101 |
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177 | if (s->start_frame >= 0 && s->nb_frames >= s->start_frame) |
102 | 18 | drop = 0; | |
103 |
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177 | if (s->start_pts != AV_NOPTS_VALUE && frame->pts != AV_NOPTS_VALUE && |
104 |
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166 | frame->pts >= s->start_pts) |
105 | 151 | drop = 0; | |
106 |
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177 | if (drop) |
107 | 14 | goto drop; | |
108 | } | ||
109 | |||
110 |
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3943 | if (s->first_pts == AV_NOPTS_VALUE && frame->pts != AV_NOPTS_VALUE) |
111 | 116 | s->first_pts = frame->pts; | |
112 | |||
113 |
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3943 | if (s->end_frame != INT64_MAX || s->end_pts != AV_NOPTS_VALUE || s->duration_tb) { |
114 | 3803 | drop = 1; | |
115 | |||
116 |
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3803 | if (s->end_frame != INT64_MAX && s->nb_frames < s->end_frame) |
117 | 9 | drop = 0; | |
118 |
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3803 | if (s->end_pts != AV_NOPTS_VALUE && frame->pts != AV_NOPTS_VALUE && |
119 |
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13 | frame->pts < s->end_pts) |
120 | 11 | drop = 0; | |
121 |
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3803 | if (s->duration_tb && frame->pts != AV_NOPTS_VALUE && |
122 |
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3782 | frame->pts - s->first_pts < s->duration_tb) |
123 | 3677 | drop = 0; | |
124 | |||
125 |
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3803 | if (drop) { |
126 | 108 | s->eof = 1; | |
127 | 108 | ff_inlink_set_status(inlink, AVERROR_EOF); | |
128 | 108 | ff_outlink_set_status(ctx->outputs[0], AVERROR_EOF, frame->pts); | |
129 | 108 | goto drop; | |
130 | } | ||
131 | } | ||
132 | |||
133 | 3835 | s->nb_frames++; | |
134 | |||
135 | 3835 | return ff_filter_frame(ctx->outputs[0], frame); | |
136 | |||
137 | 122 | drop: | |
138 |
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122 | if (!s->eof) |
139 | 14 | ff_filter_set_ready(ctx, 100); | |
140 | 122 | s->nb_frames++; | |
141 | 122 | av_frame_free(&frame); | |
142 | 122 | return 0; | |
143 | } | ||
144 | #endif // CONFIG_TRIM_FILTER | ||
145 | |||
146 | #if CONFIG_ATRIM_FILTER | ||
147 | 10370 | static int atrim_filter_frame(AVFilterLink *inlink, AVFrame *frame) | |
148 | { | ||
149 | 10370 | AVFilterContext *ctx = inlink->dst; | |
150 | 10370 | TrimContext *s = ctx->priv; | |
151 | int64_t start_sample, end_sample; | ||
152 | int64_t pts; | ||
153 | int drop; | ||
154 | |||
155 | /* drop everything if EOF has already been returned */ | ||
156 |
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10370 | if (s->eof) { |
157 | ✗ | av_frame_free(&frame); | |
158 | ✗ | return 0; | |
159 | } | ||
160 | |||
161 |
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10370 | if (frame->pts != AV_NOPTS_VALUE) |
162 | 10370 | pts = av_rescale_q(frame->pts, inlink->time_base, | |
163 | 10370 | (AVRational){ 1, inlink->sample_rate }); | |
164 | else | ||
165 | ✗ | pts = s->next_pts; | |
166 | 10370 | s->next_pts = pts + frame->nb_samples; | |
167 | |||
168 | /* check if at least a part of the frame is after the start time */ | ||
169 |
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10370 | if (s->start_sample < 0 && s->start_pts == AV_NOPTS_VALUE) { |
170 | 8590 | start_sample = 0; | |
171 | } else { | ||
172 | 1780 | drop = 1; | |
173 | 1780 | start_sample = frame->nb_samples; | |
174 | |||
175 |
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1780 | if (s->start_sample >= 0 && |
176 |
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5 | s->nb_samples + frame->nb_samples > s->start_sample) { |
177 | 5 | drop = 0; | |
178 | 5 | start_sample = FFMIN(start_sample, s->start_sample - s->nb_samples); | |
179 | } | ||
180 | |||
181 |
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1780 | if (s->start_pts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && |
182 |
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1778 | pts + frame->nb_samples > s->start_pts) { |
183 | 1454 | drop = 0; | |
184 | 1454 | start_sample = FFMIN(start_sample, s->start_pts - pts); | |
185 | } | ||
186 | |||
187 |
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1780 | if (drop) |
188 | 324 | goto drop; | |
189 | } | ||
190 | |||
191 |
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10046 | if (s->first_pts == AV_NOPTS_VALUE) |
192 | 459 | s->first_pts = pts + start_sample; | |
193 | |||
194 | /* check if at least a part of the frame is before the end time */ | ||
195 |
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10046 | if (s->end_sample == INT64_MAX && s->end_pts == AV_NOPTS_VALUE && !s->duration_tb) { |
196 | 1446 | end_sample = frame->nb_samples; | |
197 | } else { | ||
198 | 8600 | drop = 1; | |
199 | 8600 | end_sample = 0; | |
200 | |||
201 |
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8600 | if (s->end_sample != INT64_MAX && |
202 |
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5250 | s->nb_samples < s->end_sample) { |
203 | 4915 | drop = 0; | |
204 | 4915 | end_sample = FFMAX(end_sample, s->end_sample - s->nb_samples); | |
205 | } | ||
206 | |||
207 |
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8600 | if (s->end_pts != AV_NOPTS_VALUE && pts != AV_NOPTS_VALUE && |
208 |
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23 | pts < s->end_pts) { |
209 | 20 | drop = 0; | |
210 | 20 | end_sample = FFMAX(end_sample, s->end_pts - pts); | |
211 | } | ||
212 | |||
213 |
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8600 | if (s->duration_tb && pts - s->first_pts < s->duration_tb) { |
214 | 3226 | drop = 0; | |
215 | 3226 | end_sample = FFMAX(end_sample, s->first_pts + s->duration_tb - pts); | |
216 | } | ||
217 | |||
218 |
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8600 | if (drop) { |
219 | 441 | s->eof = 1; | |
220 | 441 | ff_inlink_set_status(inlink, AVERROR_EOF); | |
221 | 441 | ff_outlink_set_status(ctx->outputs[0], AVERROR_EOF, frame->pts); | |
222 | 441 | goto drop; | |
223 | } | ||
224 | } | ||
225 | |||
226 | 9605 | s->nb_samples += frame->nb_samples; | |
227 | 9605 | start_sample = FFMAX(0, start_sample); | |
228 | 9605 | end_sample = FFMIN(frame->nb_samples, end_sample); | |
229 |
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9605 | if (start_sample >= end_sample || !frame->nb_samples) |
230 | ✗ | goto drop; | |
231 | |||
232 |
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9605 | if (start_sample) { |
233 | 6 | AVFrame *out = ff_get_audio_buffer(ctx->outputs[0], end_sample - start_sample); | |
234 |
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6 | if (!out) { |
235 | ✗ | av_frame_free(&frame); | |
236 | ✗ | return AVERROR(ENOMEM); | |
237 | } | ||
238 | |||
239 | 6 | av_frame_copy_props(out, frame); | |
240 | 6 | av_samples_copy(out->extended_data, frame->extended_data, 0, start_sample, | |
241 | out->nb_samples, inlink->ch_layout.nb_channels, | ||
242 | 6 | frame->format); | |
243 |
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6 | if (out->pts != AV_NOPTS_VALUE) |
244 | 6 | out->pts += av_rescale_q(start_sample, (AVRational){ 1, out->sample_rate }, | |
245 | inlink->time_base); | ||
246 | |||
247 | 6 | av_frame_free(&frame); | |
248 | 6 | frame = out; | |
249 | } else | ||
250 | 9599 | frame->nb_samples = end_sample; | |
251 | |||
252 | 9605 | return ff_filter_frame(ctx->outputs[0], frame); | |
253 | |||
254 | 765 | drop: | |
255 |
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765 | if (!s->eof) |
256 | 324 | ff_filter_set_ready(ctx, 100); | |
257 | 765 | s->nb_samples += frame->nb_samples; | |
258 | 765 | av_frame_free(&frame); | |
259 | 765 | return 0; | |
260 | } | ||
261 | #endif // CONFIG_ATRIM_FILTER | ||
262 | |||
263 | 575 | static int config_input(AVFilterLink *inlink) | |
264 | { | ||
265 | 575 | AVFilterContext *ctx = inlink->dst; | |
266 | 575 | TrimContext *s = ctx->priv; | |
267 | 116 | AVRational tb = (inlink->type == AVMEDIA_TYPE_VIDEO) ? | |
268 |
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575 | inlink->time_base : (AVRational){ 1, inlink->sample_rate }; |
269 | |||
270 | #if CONFIG_TRIM_FILTER | ||
271 |
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575 | if (inlink->type == AVMEDIA_TYPE_VIDEO) |
272 | 116 | s->filter_frame = trim_filter_frame; | |
273 | #endif | ||
274 | #if CONFIG_ATRIM_FILTER | ||
275 |
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575 | if (inlink->type == AVMEDIA_TYPE_AUDIO) |
276 | 459 | s->filter_frame = atrim_filter_frame; | |
277 | #endif | ||
278 |
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575 | if (s->start_time != INT64_MAX) { |
279 | 25 | int64_t start_pts = av_rescale_q(s->start_time, AV_TIME_BASE_Q, tb); | |
280 |
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25 | if (s->start_pts == AV_NOPTS_VALUE || start_pts < s->start_pts) |
281 | 25 | s->start_pts = start_pts; | |
282 | } | ||
283 |
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575 | if (s->end_time != INT64_MAX) { |
284 | 5 | int64_t end_pts = av_rescale_q(s->end_time, AV_TIME_BASE_Q, tb); | |
285 |
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5 | if (s->end_pts == AV_NOPTS_VALUE || end_pts > s->end_pts) |
286 | 5 | s->end_pts = end_pts; | |
287 | } | ||
288 |
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575 | if (s->duration) |
289 | 216 | s->duration_tb = av_rescale_q(s->duration, AV_TIME_BASE_Q, tb); | |
290 | |||
291 | 575 | return 0; | |
292 | } | ||
293 | |||
294 | 27995 | static int activate(AVFilterContext *ctx) | |
295 | { | ||
296 | 27995 | TrimContext *s = ctx->priv; | |
297 | 27995 | AVFilterLink *inlink = ctx->inputs[0]; | |
298 | 27995 | AVFilterLink *outlink = ctx->outputs[0]; | |
299 | |||
300 |
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27995 | FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink); |
301 | |||
302 |
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27989 | if (!s->eof && ff_inlink_queued_frames(inlink)) { |
303 | 14327 | AVFrame *frame = NULL; | |
304 | int ret; | ||
305 | |||
306 | 14327 | ret = ff_inlink_consume_frame(inlink, &frame); | |
307 |
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14327 | if (ret < 0) |
308 | 14327 | return ret; | |
309 |
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14327 | if (ret > 0) |
310 | 14327 | return s->filter_frame(inlink, frame); | |
311 | } | ||
312 | |||
313 |
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13662 | FF_FILTER_FORWARD_STATUS(inlink, outlink); |
314 |
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13648 | FF_FILTER_FORWARD_WANTED(outlink, inlink); |
315 | |||
316 | 6 | return FFERROR_NOT_READY; | |
317 | } | ||
318 | |||
319 | #define OFFSET(x) offsetof(TrimContext, x) | ||
320 | #define COMMON_OPTS \ | ||
321 | { "start", "Timestamp of the first frame that " \ | ||
322 | "should be passed", OFFSET(start_time), AV_OPT_TYPE_DURATION, { .i64 = INT64_MAX }, INT64_MIN, INT64_MAX, FLAGS }, \ | ||
323 | { "starti", "Timestamp of the first frame that " \ | ||
324 | "should be passed", OFFSET(start_time), AV_OPT_TYPE_DURATION, { .i64 = INT64_MAX }, INT64_MIN, INT64_MAX, FLAGS }, \ | ||
325 | { "end", "Timestamp of the first frame that " \ | ||
326 | "should be dropped again", OFFSET(end_time), AV_OPT_TYPE_DURATION, { .i64 = INT64_MAX }, INT64_MIN, INT64_MAX, FLAGS }, \ | ||
327 | { "endi", "Timestamp of the first frame that " \ | ||
328 | "should be dropped again", OFFSET(end_time), AV_OPT_TYPE_DURATION, { .i64 = INT64_MAX }, INT64_MIN, INT64_MAX, FLAGS }, \ | ||
329 | { "start_pts", "Timestamp of the first frame that should be " \ | ||
330 | " passed", OFFSET(start_pts), AV_OPT_TYPE_INT64, { .i64 = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, FLAGS }, \ | ||
331 | { "end_pts", "Timestamp of the first frame that should be " \ | ||
332 | "dropped again", OFFSET(end_pts), AV_OPT_TYPE_INT64, { .i64 = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, FLAGS }, \ | ||
333 | { "duration", "Maximum duration of the output", OFFSET(duration), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT64_MAX, FLAGS }, \ | ||
334 | { "durationi", "Maximum duration of the output", OFFSET(duration), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT64_MAX, FLAGS }, | ||
335 | |||
336 | |||
337 | #if CONFIG_TRIM_FILTER | ||
338 | |||
339 | #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | ||
340 | static const AVOption trim_options[] = { | ||
341 | COMMON_OPTS | ||
342 | { "start_frame", "Number of the first frame that should be passed " | ||
343 | "to the output", OFFSET(start_frame), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, FLAGS }, | ||
344 | { "end_frame", "Number of the first frame that should be dropped " | ||
345 | "again", OFFSET(end_frame), AV_OPT_TYPE_INT64, { .i64 = INT64_MAX }, 0, INT64_MAX, FLAGS }, | ||
346 | { NULL } | ||
347 | }; | ||
348 | #undef FLAGS | ||
349 | |||
350 | AVFILTER_DEFINE_CLASS(trim); | ||
351 | |||
352 | static const AVFilterPad trim_inputs[] = { | ||
353 | { | ||
354 | .name = "default", | ||
355 | .type = AVMEDIA_TYPE_VIDEO, | ||
356 | .config_props = config_input, | ||
357 | }, | ||
358 | }; | ||
359 | |||
360 | const AVFilter ff_vf_trim = { | ||
361 | .name = "trim", | ||
362 | .description = NULL_IF_CONFIG_SMALL("Pick one continuous section from the input, drop the rest."), | ||
363 | .init = init, | ||
364 | .activate = activate, | ||
365 | .priv_size = sizeof(TrimContext), | ||
366 | .priv_class = &trim_class, | ||
367 | FILTER_INPUTS(trim_inputs), | ||
368 | FILTER_OUTPUTS(ff_video_default_filterpad), | ||
369 | }; | ||
370 | #endif // CONFIG_TRIM_FILTER | ||
371 | |||
372 | #if CONFIG_ATRIM_FILTER | ||
373 | |||
374 | #define FLAGS AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | ||
375 | static const AVOption atrim_options[] = { | ||
376 | COMMON_OPTS | ||
377 | { "start_sample", "Number of the first audio sample that should be " | ||
378 | "passed to the output", OFFSET(start_sample), AV_OPT_TYPE_INT64, { .i64 = -1 }, -1, INT64_MAX, FLAGS }, | ||
379 | { "end_sample", "Number of the first audio sample that should be " | ||
380 | "dropped again", OFFSET(end_sample), AV_OPT_TYPE_INT64, { .i64 = INT64_MAX }, 0, INT64_MAX, FLAGS }, | ||
381 | { NULL } | ||
382 | }; | ||
383 | #undef FLAGS | ||
384 | |||
385 | AVFILTER_DEFINE_CLASS(atrim); | ||
386 | |||
387 | static const AVFilterPad atrim_inputs[] = { | ||
388 | { | ||
389 | .name = "default", | ||
390 | .type = AVMEDIA_TYPE_AUDIO, | ||
391 | .config_props = config_input, | ||
392 | }, | ||
393 | }; | ||
394 | |||
395 | const AVFilter ff_af_atrim = { | ||
396 | .name = "atrim", | ||
397 | .description = NULL_IF_CONFIG_SMALL("Pick one continuous section from the input, drop the rest."), | ||
398 | .init = init, | ||
399 | .activate = activate, | ||
400 | .priv_size = sizeof(TrimContext), | ||
401 | .priv_class = &atrim_class, | ||
402 | .flags = AVFILTER_FLAG_METADATA_ONLY, | ||
403 | FILTER_INPUTS(atrim_inputs), | ||
404 | FILTER_OUTPUTS(ff_audio_default_filterpad), | ||
405 | }; | ||
406 | #endif // CONFIG_ATRIM_FILTER | ||
407 |