Commit 7037f943 authored by Nicolas George's avatar Nicolas George

lavfi: add realtime filter.

Similar to the -re option in ffmpeg that only works for input files.
Can be used at any place in the filter graph.
parent 432e27e6
...@@ -31,6 +31,7 @@ version <next>: ...@@ -31,6 +31,7 @@ version <next>:
- ADPCM AICA decoder - ADPCM AICA decoder
- Interplay ACM demuxer and audio decoder - Interplay ACM demuxer and audio decoder
- XMA1 & XMA2 decoder - XMA1 & XMA2 decoder
- realtime filter
version 2.8: version 2.8:
......
...@@ -13068,6 +13068,22 @@ following one, the permission might not be received as expected in that ...@@ -13068,6 +13068,22 @@ following one, the permission might not be received as expected in that
following filter. Inserting a @ref{format} or @ref{aformat} filter before the following filter. Inserting a @ref{format} or @ref{aformat} filter before the
perms/aperms filter can avoid this problem. perms/aperms filter can avoid this problem.
@section realtime, arealtime
Slow down filtering to match real time approximatively.
These filters will pause the filtering for a variable amount of time to
match the output rate with the input timestamps.
They are similar to the @option{re} option to @code{ffmpeg}.
They accept the following options:
@table @option
@item limit
Time limit for the pauses. Any pause longer than that will be considered
a timestamp discontinuity and reset the timer. Default is 2 seconds.
@end table
@section select, aselect @section select, aselect
Select frames to pass in output. Select frames to pass in output.
......
...@@ -39,6 +39,7 @@ OBJS-$(CONFIG_ANULL_FILTER) += af_anull.o ...@@ -39,6 +39,7 @@ OBJS-$(CONFIG_ANULL_FILTER) += af_anull.o
OBJS-$(CONFIG_APAD_FILTER) += af_apad.o OBJS-$(CONFIG_APAD_FILTER) += af_apad.o
OBJS-$(CONFIG_APERMS_FILTER) += f_perms.o OBJS-$(CONFIG_APERMS_FILTER) += f_perms.o
OBJS-$(CONFIG_APHASER_FILTER) += af_aphaser.o generate_wave_table.o OBJS-$(CONFIG_APHASER_FILTER) += af_aphaser.o generate_wave_table.o
OBJS-$(CONFIG_AREALTIME_FILTER) += f_realtime.o
OBJS-$(CONFIG_ARESAMPLE_FILTER) += af_aresample.o OBJS-$(CONFIG_ARESAMPLE_FILTER) += af_aresample.o
OBJS-$(CONFIG_AREVERSE_FILTER) += f_reverse.o OBJS-$(CONFIG_AREVERSE_FILTER) += f_reverse.o
OBJS-$(CONFIG_ASELECT_FILTER) += f_select.o OBJS-$(CONFIG_ASELECT_FILTER) += f_select.o
...@@ -197,6 +198,7 @@ OBJS-$(CONFIG_PSNR_FILTER) += vf_psnr.o dualinput.o framesync. ...@@ -197,6 +198,7 @@ OBJS-$(CONFIG_PSNR_FILTER) += vf_psnr.o dualinput.o framesync.
OBJS-$(CONFIG_PULLUP_FILTER) += vf_pullup.o OBJS-$(CONFIG_PULLUP_FILTER) += vf_pullup.o
OBJS-$(CONFIG_QP_FILTER) += vf_qp.o OBJS-$(CONFIG_QP_FILTER) += vf_qp.o
OBJS-$(CONFIG_RANDOM_FILTER) += vf_random.o OBJS-$(CONFIG_RANDOM_FILTER) += vf_random.o
OBJS-$(CONFIG_REALTIME_FILTER) += f_realtime.o
OBJS-$(CONFIG_REMOVEGRAIN_FILTER) += vf_removegrain.o OBJS-$(CONFIG_REMOVEGRAIN_FILTER) += vf_removegrain.o
OBJS-$(CONFIG_REMOVELOGO_FILTER) += bbox.o lswsutils.o lavfutils.o vf_removelogo.o OBJS-$(CONFIG_REMOVELOGO_FILTER) += bbox.o lswsutils.o lavfutils.o vf_removelogo.o
OBJS-$(CONFIG_REPEATFIELDS_FILTER) += vf_repeatfields.o OBJS-$(CONFIG_REPEATFIELDS_FILTER) += vf_repeatfields.o
......
...@@ -61,6 +61,7 @@ void avfilter_register_all(void) ...@@ -61,6 +61,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(APAD, apad, af); REGISTER_FILTER(APAD, apad, af);
REGISTER_FILTER(APERMS, aperms, af); REGISTER_FILTER(APERMS, aperms, af);
REGISTER_FILTER(APHASER, aphaser, af); REGISTER_FILTER(APHASER, aphaser, af);
REGISTER_FILTER(AREALTIME, arealtime, af);
REGISTER_FILTER(ARESAMPLE, aresample, af); REGISTER_FILTER(ARESAMPLE, aresample, af);
REGISTER_FILTER(AREVERSE, areverse, af); REGISTER_FILTER(AREVERSE, areverse, af);
REGISTER_FILTER(ASELECT, aselect, af); REGISTER_FILTER(ASELECT, aselect, af);
...@@ -218,6 +219,7 @@ void avfilter_register_all(void) ...@@ -218,6 +219,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(PULLUP, pullup, vf); REGISTER_FILTER(PULLUP, pullup, vf);
REGISTER_FILTER(QP, qp, vf); REGISTER_FILTER(QP, qp, vf);
REGISTER_FILTER(RANDOM, random, vf); REGISTER_FILTER(RANDOM, random, vf);
REGISTER_FILTER(REALTIME, realtime, vf);
REGISTER_FILTER(REMOVEGRAIN, removegrain, vf); REGISTER_FILTER(REMOVEGRAIN, removegrain, vf);
REGISTER_FILTER(REMOVELOGO, removelogo, vf); REGISTER_FILTER(REMOVELOGO, removelogo, vf);
REGISTER_FILTER(REPEATFIELDS, repeatfields, vf); REGISTER_FILTER(REPEATFIELDS, repeatfields, vf);
......
/*
* Copyright (c) 2015 Nicolas George
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/opt.h"
#include "libavutil/time.h"
#include "avfilter.h"
#include "internal.h"
typedef struct RealtimeContext {
const AVClass *class;
int64_t delta;
int64_t limit;
unsigned inited;
} RealtimeContext;
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
RealtimeContext *s = ctx->priv;
if (frame->pts != AV_NOPTS_VALUE) {
int64_t pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q);
int64_t now = av_gettime_relative();
int64_t sleep = pts - now + s->delta;
if (!s->inited) {
s->inited = 1;
sleep = 0;
s->delta = now - pts;
}
if (sleep > s->limit || sleep < -s->limit) {
av_log(ctx, AV_LOG_WARNING,
"time discontinuity detected: %"PRIi64" us, resetting\n",
sleep);
sleep = 0;
s->delta = now - pts;
}
if (sleep > 0) {
av_log(ctx, AV_LOG_DEBUG, "sleeping %"PRIi64" us\n", sleep);
for (; sleep > 600000000; sleep -= 600000000)
av_usleep(600000000);
av_usleep(sleep);
}
}
return ff_filter_frame(inlink->dst->outputs[0], frame);
}
#define OFFSET(x) offsetof(RealtimeContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
static const AVOption options[] = {
{ "limit", "sleep time limit", OFFSET(limit), AV_OPT_TYPE_DURATION, { .i64 = 2000000 }, 0, INT64_MAX, FLAGS },
{ NULL }
};
#if CONFIG_REALTIME_FILTER
#define realtime_options options
AVFILTER_DEFINE_CLASS(realtime);
static const AVFilterPad avfilter_vf_realtime_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad avfilter_vf_realtime_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
{ NULL }
};
AVFilter ff_vf_realtime = {
.name = "realtime",
.description = NULL_IF_CONFIG_SMALL("Slow down filtering to match realtime"),
.priv_size = sizeof(RealtimeContext),
.priv_class = &realtime_class,
.inputs = avfilter_vf_realtime_inputs,
.outputs = avfilter_vf_realtime_outputs,
};
#endif /* CONFIG_REALTIME_FILTER */
#if CONFIG_AREALTIME_FILTER
#define arealtime_options options
AVFILTER_DEFINE_CLASS(arealtime);
static const AVFilterPad arealtime_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.filter_frame = filter_frame,
},
{ NULL }
};
static const AVFilterPad arealtime_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
},
{ NULL }
};
AVFilter ff_af_arealtime = {
.name = "arealtime",
.description = NULL_IF_CONFIG_SMALL("Slow down filtering to match realtime"),
.priv_size = sizeof(RealtimeContext),
.priv_class = &arealtime_class,
.inputs = arealtime_inputs,
.outputs = arealtime_outputs,
};
#endif /* CONFIG_AREALTIME_FILTER */
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment