2 * Copyright (c) 2013-2015 Paul B Mahol
4 * This file is part of FFmpeg.
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.
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.
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
26 #include "libavutil/opt.h"
32 typedef struct AudioFadeContext {
42 int crossfade_is_over;
45 void (*fade_samples)(uint8_t **dst, uint8_t * const *src,
46 int nb_samples, int channels, int direction,
47 int64_t start, int64_t range, int curve);
48 void (*crossfade_samples)(uint8_t **dst, uint8_t * const *cf0,
50 int nb_samples, int channels,
51 int curve0, int curve1);
54 enum CurveType { TRI, QSIN, ESIN, HSIN, LOG, IPAR, QUA, CUB, SQU, CBR, PAR, EXP, IQSIN, IHSIN, DESE, DESI, LOSI, NB_CURVES };
56 #define OFFSET(x) offsetof(AudioFadeContext, x)
57 #define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
59 static int query_formats(AVFilterContext *ctx)
61 AVFilterFormats *formats;
62 AVFilterChannelLayouts *layouts;
63 static const enum AVSampleFormat sample_fmts[] = {
64 AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16P,
65 AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32P,
66 AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLTP,
67 AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBLP,
72 layouts = ff_all_channel_counts();
74 return AVERROR(ENOMEM);
75 ret = ff_set_common_channel_layouts(ctx, layouts);
79 formats = ff_make_format_list(sample_fmts);
81 return AVERROR(ENOMEM);
82 ret = ff_set_common_formats(ctx, formats);
86 formats = ff_all_samplerates();
88 return AVERROR(ENOMEM);
89 return ff_set_common_samplerates(ctx, formats);
92 static double fade_gain(int curve, int64_t index, int64_t range)
94 #define CUBE(a) ((a)*(a)*(a))
97 gain = av_clipd(1.0 * index / range, 0, 1.0);
101 gain = sin(gain * M_PI / 2.0);
104 /* 0.6... = 2 / M_PI */
105 gain = 0.6366197723675814 * asin(gain);
108 gain = 1.0 - cos(M_PI / 4.0 * (CUBE(2.0*gain - 1) + 1));
111 gain = (1.0 - cos(gain * M_PI)) / 2.0;
114 /* 0.3... = 1 / M_PI */
115 gain = 0.3183098861837907 * acos(1 - 2 * gain);
118 /* -11.5... = 5*ln(0.1) */
119 gain = exp(-11.512925464970227 * (1 - gain));
122 gain = av_clipd(1 + 0.2 * log10(gain), 0, 1.0);
125 gain = 1 - sqrt(1 - gain);
128 gain = (1 - (1 - gain) * (1 - gain));
143 gain = gain <= 0.5 ? cbrt(2 * gain) / 2: 1 - cbrt(2 * (1 - gain)) / 2;
146 gain = gain <= 0.5 ? CUBE(2 * gain) / 2: 1 - CUBE(2 * (1 - gain)) / 2;
149 const double a = 1. / (1. - 0.787) - 1;
150 double A = 1. / (1.0 + exp(0 -((gain-0.5) * a * 2.0)));
151 double B = 1. / (1.0 + exp(a));
152 double C = 1. / (1.0 + exp(0-a));
153 gain = (A - B) / (C - B);
161 #define FADE_PLANAR(name, type) \
162 static void fade_samples_## name ##p(uint8_t **dst, uint8_t * const *src, \
163 int nb_samples, int channels, int dir, \
164 int64_t start, int64_t range, int curve) \
168 for (i = 0; i < nb_samples; i++) { \
169 double gain = fade_gain(curve, start + i * dir, range); \
170 for (c = 0; c < channels; c++) { \
171 type *d = (type *)dst[c]; \
172 const type *s = (type *)src[c]; \
174 d[i] = s[i] * gain; \
179 #define FADE(name, type) \
180 static void fade_samples_## name (uint8_t **dst, uint8_t * const *src, \
181 int nb_samples, int channels, int dir, \
182 int64_t start, int64_t range, int curve) \
184 type *d = (type *)dst[0]; \
185 const type *s = (type *)src[0]; \
188 for (i = 0; i < nb_samples; i++) { \
189 double gain = fade_gain(curve, start + i * dir, range); \
190 for (c = 0; c < channels; c++, k++) \
191 d[k] = s[k] * gain; \
195 FADE_PLANAR(dbl, double)
196 FADE_PLANAR(flt, float)
197 FADE_PLANAR(s16, int16_t)
198 FADE_PLANAR(s32, int32_t)
205 static int config_output(AVFilterLink *outlink)
207 AVFilterContext *ctx = outlink->src;
208 AudioFadeContext *s = ctx->priv;
210 switch (outlink->format) {
211 case AV_SAMPLE_FMT_DBL: s->fade_samples = fade_samples_dbl; break;
212 case AV_SAMPLE_FMT_DBLP: s->fade_samples = fade_samples_dblp; break;
213 case AV_SAMPLE_FMT_FLT: s->fade_samples = fade_samples_flt; break;
214 case AV_SAMPLE_FMT_FLTP: s->fade_samples = fade_samples_fltp; break;
215 case AV_SAMPLE_FMT_S16: s->fade_samples = fade_samples_s16; break;
216 case AV_SAMPLE_FMT_S16P: s->fade_samples = fade_samples_s16p; break;
217 case AV_SAMPLE_FMT_S32: s->fade_samples = fade_samples_s32; break;
218 case AV_SAMPLE_FMT_S32P: s->fade_samples = fade_samples_s32p; break;
222 s->nb_samples = av_rescale(s->duration, outlink->sample_rate, AV_TIME_BASE);
224 s->start_sample = av_rescale(s->start_time, outlink->sample_rate, AV_TIME_BASE);
229 #if CONFIG_AFADE_FILTER
231 static const AVOption afade_options[] = {
232 { "type", "set the fade direction", OFFSET(type), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, FLAGS, "type" },
233 { "t", "set the fade direction", OFFSET(type), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, FLAGS, "type" },
234 { "in", "fade-in", 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, 0, 0, FLAGS, "type" },
235 { "out", "fade-out", 0, AV_OPT_TYPE_CONST, {.i64 = 1 }, 0, 0, FLAGS, "type" },
236 { "start_sample", "set number of first sample to start fading", OFFSET(start_sample), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, FLAGS },
237 { "ss", "set number of first sample to start fading", OFFSET(start_sample), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, FLAGS },
238 { "nb_samples", "set number of samples for fade duration", OFFSET(nb_samples), AV_OPT_TYPE_INT64, {.i64 = 44100}, 1, INT64_MAX, FLAGS },
239 { "ns", "set number of samples for fade duration", OFFSET(nb_samples), AV_OPT_TYPE_INT64, {.i64 = 44100}, 1, INT64_MAX, FLAGS },
240 { "start_time", "set time to start fading", OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
241 { "st", "set time to start fading", OFFSET(start_time), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
242 { "duration", "set fade duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
243 { "d", "set fade duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, INT64_MAX, FLAGS },
244 { "curve", "set fade curve type", OFFSET(curve), AV_OPT_TYPE_INT, {.i64 = TRI }, 0, NB_CURVES - 1, FLAGS, "curve" },
245 { "c", "set fade curve type", OFFSET(curve), AV_OPT_TYPE_INT, {.i64 = TRI }, 0, NB_CURVES - 1, FLAGS, "curve" },
246 { "tri", "linear slope", 0, AV_OPT_TYPE_CONST, {.i64 = TRI }, 0, 0, FLAGS, "curve" },
247 { "qsin", "quarter of sine wave", 0, AV_OPT_TYPE_CONST, {.i64 = QSIN }, 0, 0, FLAGS, "curve" },
248 { "esin", "exponential sine wave", 0, AV_OPT_TYPE_CONST, {.i64 = ESIN }, 0, 0, FLAGS, "curve" },
249 { "hsin", "half of sine wave", 0, AV_OPT_TYPE_CONST, {.i64 = HSIN }, 0, 0, FLAGS, "curve" },
250 { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64 = LOG }, 0, 0, FLAGS, "curve" },
251 { "ipar", "inverted parabola", 0, AV_OPT_TYPE_CONST, {.i64 = IPAR }, 0, 0, FLAGS, "curve" },
252 { "qua", "quadratic", 0, AV_OPT_TYPE_CONST, {.i64 = QUA }, 0, 0, FLAGS, "curve" },
253 { "cub", "cubic", 0, AV_OPT_TYPE_CONST, {.i64 = CUB }, 0, 0, FLAGS, "curve" },
254 { "squ", "square root", 0, AV_OPT_TYPE_CONST, {.i64 = SQU }, 0, 0, FLAGS, "curve" },
255 { "cbr", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64 = CBR }, 0, 0, FLAGS, "curve" },
256 { "par", "parabola", 0, AV_OPT_TYPE_CONST, {.i64 = PAR }, 0, 0, FLAGS, "curve" },
257 { "exp", "exponential", 0, AV_OPT_TYPE_CONST, {.i64 = EXP }, 0, 0, FLAGS, "curve" },
258 { "iqsin", "inverted quarter of sine wave", 0, AV_OPT_TYPE_CONST, {.i64 = IQSIN}, 0, 0, FLAGS, "curve" },
259 { "ihsin", "inverted half of sine wave", 0, AV_OPT_TYPE_CONST, {.i64 = IHSIN}, 0, 0, FLAGS, "curve" },
260 { "dese", "double-exponential seat", 0, AV_OPT_TYPE_CONST, {.i64 = DESE }, 0, 0, FLAGS, "curve" },
261 { "desi", "double-exponential sigmoid", 0, AV_OPT_TYPE_CONST, {.i64 = DESI }, 0, 0, FLAGS, "curve" },
262 { "losi", "logistic sigmoid", 0, AV_OPT_TYPE_CONST, {.i64 = LOSI }, 0, 0, FLAGS, "curve" },
266 AVFILTER_DEFINE_CLASS(afade);
268 static av_cold int init(AVFilterContext *ctx)
270 AudioFadeContext *s = ctx->priv;
272 if (INT64_MAX - s->nb_samples < s->start_sample)
273 return AVERROR(EINVAL);
278 static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
280 AudioFadeContext *s = inlink->dst->priv;
281 AVFilterLink *outlink = inlink->dst->outputs[0];
282 int nb_samples = buf->nb_samples;
284 int64_t cur_sample = av_rescale_q(buf->pts, inlink->time_base, (AVRational){1, inlink->sample_rate});
286 if ((!s->type && (s->start_sample + s->nb_samples < cur_sample)) ||
287 ( s->type && (cur_sample + nb_samples < s->start_sample)))
288 return ff_filter_frame(outlink, buf);
290 if (av_frame_is_writable(buf)) {
293 out_buf = ff_get_audio_buffer(outlink, nb_samples);
295 return AVERROR(ENOMEM);
296 av_frame_copy_props(out_buf, buf);
299 if ((!s->type && (cur_sample + nb_samples < s->start_sample)) ||
300 ( s->type && (s->start_sample + s->nb_samples < cur_sample))) {
301 av_samples_set_silence(out_buf->extended_data, 0, nb_samples,
302 out_buf->channels, out_buf->format);
307 start = cur_sample - s->start_sample;
309 start = s->start_sample + s->nb_samples - cur_sample;
311 s->fade_samples(out_buf->extended_data, buf->extended_data,
312 nb_samples, buf->channels,
313 s->type ? -1 : 1, start,
314 s->nb_samples, s->curve);
320 return ff_filter_frame(outlink, out_buf);
323 static const AVFilterPad avfilter_af_afade_inputs[] = {
326 .type = AVMEDIA_TYPE_AUDIO,
327 .filter_frame = filter_frame,
332 static const AVFilterPad avfilter_af_afade_outputs[] = {
335 .type = AVMEDIA_TYPE_AUDIO,
336 .config_props = config_output,
341 AVFilter ff_af_afade = {
343 .description = NULL_IF_CONFIG_SMALL("Fade in/out input audio."),
344 .query_formats = query_formats,
345 .priv_size = sizeof(AudioFadeContext),
347 .inputs = avfilter_af_afade_inputs,
348 .outputs = avfilter_af_afade_outputs,
349 .priv_class = &afade_class,
350 .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
353 #endif /* CONFIG_AFADE_FILTER */
355 #if CONFIG_ACROSSFADE_FILTER
357 static const AVOption acrossfade_options[] = {
358 { "nb_samples", "set number of samples for cross fade duration", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64 = 44100}, 1, INT32_MAX/10, FLAGS },
359 { "ns", "set number of samples for cross fade duration", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64 = 44100}, 1, INT32_MAX/10, FLAGS },
360 { "duration", "set cross fade duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, 60000000, FLAGS },
361 { "d", "set cross fade duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = 0. }, 0, 60000000, FLAGS },
362 { "overlap", "overlap 1st stream end with 2nd stream start", OFFSET(overlap), AV_OPT_TYPE_BOOL, {.i64 = 1 }, 0, 1, FLAGS },
363 { "o", "overlap 1st stream end with 2nd stream start", OFFSET(overlap), AV_OPT_TYPE_BOOL, {.i64 = 1 }, 0, 1, FLAGS },
364 { "curve1", "set fade curve type for 1st stream", OFFSET(curve), AV_OPT_TYPE_INT, {.i64 = TRI }, 0, NB_CURVES - 1, FLAGS, "curve" },
365 { "c1", "set fade curve type for 1st stream", OFFSET(curve), AV_OPT_TYPE_INT, {.i64 = TRI }, 0, NB_CURVES - 1, FLAGS, "curve" },
366 { "tri", "linear slope", 0, AV_OPT_TYPE_CONST, {.i64 = TRI }, 0, 0, FLAGS, "curve" },
367 { "qsin", "quarter of sine wave", 0, AV_OPT_TYPE_CONST, {.i64 = QSIN }, 0, 0, FLAGS, "curve" },
368 { "esin", "exponential sine wave", 0, AV_OPT_TYPE_CONST, {.i64 = ESIN }, 0, 0, FLAGS, "curve" },
369 { "hsin", "half of sine wave", 0, AV_OPT_TYPE_CONST, {.i64 = HSIN }, 0, 0, FLAGS, "curve" },
370 { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64 = LOG }, 0, 0, FLAGS, "curve" },
371 { "ipar", "inverted parabola", 0, AV_OPT_TYPE_CONST, {.i64 = IPAR }, 0, 0, FLAGS, "curve" },
372 { "qua", "quadratic", 0, AV_OPT_TYPE_CONST, {.i64 = QUA }, 0, 0, FLAGS, "curve" },
373 { "cub", "cubic", 0, AV_OPT_TYPE_CONST, {.i64 = CUB }, 0, 0, FLAGS, "curve" },
374 { "squ", "square root", 0, AV_OPT_TYPE_CONST, {.i64 = SQU }, 0, 0, FLAGS, "curve" },
375 { "cbr", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64 = CBR }, 0, 0, FLAGS, "curve" },
376 { "par", "parabola", 0, AV_OPT_TYPE_CONST, {.i64 = PAR }, 0, 0, FLAGS, "curve" },
377 { "exp", "exponential", 0, AV_OPT_TYPE_CONST, {.i64 = EXP }, 0, 0, FLAGS, "curve" },
378 { "iqsin", "inverted quarter of sine wave", 0, AV_OPT_TYPE_CONST, {.i64 = IQSIN}, 0, 0, FLAGS, "curve" },
379 { "ihsin", "inverted half of sine wave", 0, AV_OPT_TYPE_CONST, {.i64 = IHSIN}, 0, 0, FLAGS, "curve" },
380 { "dese", "double-exponential seat", 0, AV_OPT_TYPE_CONST, {.i64 = DESE }, 0, 0, FLAGS, "curve" },
381 { "desi", "double-exponential sigmoid", 0, AV_OPT_TYPE_CONST, {.i64 = DESI }, 0, 0, FLAGS, "curve" },
382 { "losi", "logistic sigmoid", 0, AV_OPT_TYPE_CONST, {.i64 = LOSI }, 0, 0, FLAGS, "curve" },
383 { "curve2", "set fade curve type for 2nd stream", OFFSET(curve2), AV_OPT_TYPE_INT, {.i64 = TRI }, 0, NB_CURVES - 1, FLAGS, "curve" },
384 { "c2", "set fade curve type for 2nd stream", OFFSET(curve2), AV_OPT_TYPE_INT, {.i64 = TRI }, 0, NB_CURVES - 1, FLAGS, "curve" },
388 AVFILTER_DEFINE_CLASS(acrossfade);
390 #define CROSSFADE_PLANAR(name, type) \
391 static void crossfade_samples_## name ##p(uint8_t **dst, uint8_t * const *cf0, \
392 uint8_t * const *cf1, \
393 int nb_samples, int channels, \
394 int curve0, int curve1) \
398 for (i = 0; i < nb_samples; i++) { \
399 double gain0 = fade_gain(curve0, nb_samples - 1 - i, nb_samples); \
400 double gain1 = fade_gain(curve1, i, nb_samples); \
401 for (c = 0; c < channels; c++) { \
402 type *d = (type *)dst[c]; \
403 const type *s0 = (type *)cf0[c]; \
404 const type *s1 = (type *)cf1[c]; \
406 d[i] = s0[i] * gain0 + s1[i] * gain1; \
411 #define CROSSFADE(name, type) \
412 static void crossfade_samples_## name (uint8_t **dst, uint8_t * const *cf0, \
413 uint8_t * const *cf1, \
414 int nb_samples, int channels, \
415 int curve0, int curve1) \
417 type *d = (type *)dst[0]; \
418 const type *s0 = (type *)cf0[0]; \
419 const type *s1 = (type *)cf1[0]; \
422 for (i = 0; i < nb_samples; i++) { \
423 double gain0 = fade_gain(curve0, nb_samples - 1 - i, nb_samples); \
424 double gain1 = fade_gain(curve1, i, nb_samples); \
425 for (c = 0; c < channels; c++, k++) \
426 d[k] = s0[k] * gain0 + s1[k] * gain1; \
430 CROSSFADE_PLANAR(dbl, double)
431 CROSSFADE_PLANAR(flt, float)
432 CROSSFADE_PLANAR(s16, int16_t)
433 CROSSFADE_PLANAR(s32, int32_t)
435 CROSSFADE(dbl, double)
436 CROSSFADE(flt, float)
437 CROSSFADE(s16, int16_t)
438 CROSSFADE(s32, int32_t)
440 static int activate(AVFilterContext *ctx)
442 AudioFadeContext *s = ctx->priv;
443 AVFilterLink *outlink = ctx->outputs[0];
444 AVFrame *in = NULL, *out, *cf[2] = { NULL };
445 int ret = 0, nb_samples, status;
448 FF_FILTER_FORWARD_STATUS_BACK_ALL(outlink, ctx);
450 if (s->crossfade_is_over) {
451 ret = ff_inlink_consume_frame(ctx->inputs[1], &in);
454 } else if (ff_inlink_acknowledge_status(ctx->inputs[1], &status, &pts)) {
455 ff_outlink_set_status(ctx->outputs[0], status, pts);
458 if (ff_outlink_frame_wanted(ctx->outputs[0]) && !in) {
459 ff_inlink_request_frame(ctx->inputs[1]);
464 s->pts += av_rescale_q(in->nb_samples,
465 (AVRational){ 1, outlink->sample_rate }, outlink->time_base);
466 return ff_filter_frame(outlink, in);
469 if (ff_inlink_queued_samples(ctx->inputs[0]) > s->nb_samples) {
470 nb_samples = ff_inlink_queued_samples(ctx->inputs[0]) - s->nb_samples;
471 if (nb_samples > 0) {
472 ret = ff_inlink_consume_samples(ctx->inputs[0], nb_samples, nb_samples, &in);
478 s->pts += av_rescale_q(in->nb_samples,
479 (AVRational){ 1, outlink->sample_rate }, outlink->time_base);
480 return ff_filter_frame(outlink, in);
481 } else if (ff_inlink_queued_samples(ctx->inputs[1]) >= s->nb_samples) {
483 out = ff_get_audio_buffer(outlink, s->nb_samples);
485 return AVERROR(ENOMEM);
487 ret = ff_inlink_consume_samples(ctx->inputs[0], s->nb_samples, s->nb_samples, &cf[0]);
493 ret = ff_inlink_consume_samples(ctx->inputs[1], s->nb_samples, s->nb_samples, &cf[1]);
499 s->crossfade_samples(out->extended_data, cf[0]->extended_data,
500 cf[1]->extended_data,
501 s->nb_samples, out->channels,
502 s->curve, s->curve2);
504 s->pts += av_rescale_q(s->nb_samples,
505 (AVRational){ 1, outlink->sample_rate }, outlink->time_base);
506 s->crossfade_is_over = 1;
507 av_frame_free(&cf[0]);
508 av_frame_free(&cf[1]);
509 return ff_filter_frame(outlink, out);
511 out = ff_get_audio_buffer(outlink, s->nb_samples);
513 return AVERROR(ENOMEM);
515 ret = ff_inlink_consume_samples(ctx->inputs[0], s->nb_samples, s->nb_samples, &cf[0]);
521 s->fade_samples(out->extended_data, cf[0]->extended_data, s->nb_samples,
522 outlink->channels, -1, s->nb_samples - 1, s->nb_samples, s->curve);
524 s->pts += av_rescale_q(s->nb_samples,
525 (AVRational){ 1, outlink->sample_rate }, outlink->time_base);
526 av_frame_free(&cf[0]);
527 ret = ff_filter_frame(outlink, out);
531 out = ff_get_audio_buffer(outlink, s->nb_samples);
533 return AVERROR(ENOMEM);
535 ret = ff_inlink_consume_samples(ctx->inputs[1], s->nb_samples, s->nb_samples, &cf[1]);
541 s->fade_samples(out->extended_data, cf[1]->extended_data, s->nb_samples,
542 outlink->channels, 1, 0, s->nb_samples, s->curve2);
544 s->pts += av_rescale_q(s->nb_samples,
545 (AVRational){ 1, outlink->sample_rate }, outlink->time_base);
546 s->crossfade_is_over = 1;
547 av_frame_free(&cf[1]);
548 return ff_filter_frame(outlink, out);
550 } else if (ff_outlink_frame_wanted(ctx->outputs[0])) {
551 if (!s->cf0_eof && ff_outlink_get_status(ctx->inputs[0])) {
554 if (ff_outlink_get_status(ctx->inputs[1])) {
555 ff_outlink_set_status(ctx->outputs[0], AVERROR_EOF, AV_NOPTS_VALUE);
559 ff_inlink_request_frame(ctx->inputs[0]);
561 ff_inlink_request_frame(ctx->inputs[1]);
568 static int acrossfade_config_output(AVFilterLink *outlink)
570 AVFilterContext *ctx = outlink->src;
571 AudioFadeContext *s = ctx->priv;
573 if (ctx->inputs[0]->sample_rate != ctx->inputs[1]->sample_rate) {
574 av_log(ctx, AV_LOG_ERROR,
575 "Inputs must have the same sample rate "
576 "%d for in0 vs %d for in1\n",
577 ctx->inputs[0]->sample_rate, ctx->inputs[1]->sample_rate);
578 return AVERROR(EINVAL);
581 outlink->sample_rate = ctx->inputs[0]->sample_rate;
582 outlink->time_base = ctx->inputs[0]->time_base;
583 outlink->channel_layout = ctx->inputs[0]->channel_layout;
584 outlink->channels = ctx->inputs[0]->channels;
586 switch (outlink->format) {
587 case AV_SAMPLE_FMT_DBL: s->crossfade_samples = crossfade_samples_dbl; break;
588 case AV_SAMPLE_FMT_DBLP: s->crossfade_samples = crossfade_samples_dblp; break;
589 case AV_SAMPLE_FMT_FLT: s->crossfade_samples = crossfade_samples_flt; break;
590 case AV_SAMPLE_FMT_FLTP: s->crossfade_samples = crossfade_samples_fltp; break;
591 case AV_SAMPLE_FMT_S16: s->crossfade_samples = crossfade_samples_s16; break;
592 case AV_SAMPLE_FMT_S16P: s->crossfade_samples = crossfade_samples_s16p; break;
593 case AV_SAMPLE_FMT_S32: s->crossfade_samples = crossfade_samples_s32; break;
594 case AV_SAMPLE_FMT_S32P: s->crossfade_samples = crossfade_samples_s32p; break;
597 config_output(outlink);
602 static const AVFilterPad avfilter_af_acrossfade_inputs[] = {
604 .name = "crossfade0",
605 .type = AVMEDIA_TYPE_AUDIO,
608 .name = "crossfade1",
609 .type = AVMEDIA_TYPE_AUDIO,
614 static const AVFilterPad avfilter_af_acrossfade_outputs[] = {
617 .type = AVMEDIA_TYPE_AUDIO,
618 .config_props = acrossfade_config_output,
623 AVFilter ff_af_acrossfade = {
624 .name = "acrossfade",
625 .description = NULL_IF_CONFIG_SMALL("Cross fade two input audio streams."),
626 .query_formats = query_formats,
627 .priv_size = sizeof(AudioFadeContext),
628 .activate = activate,
629 .priv_class = &acrossfade_class,
630 .inputs = avfilter_af_acrossfade_inputs,
631 .outputs = avfilter_af_acrossfade_outputs,
634 #endif /* CONFIG_ACROSSFADE_FILTER */