mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
122 lines
4.0 KiB
122 lines
4.0 KiB
/* |
|
* 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 "config_components.h" |
|
|
|
#include "libavutil/opt.h" |
|
#include "libavutil/time.h" |
|
#include "audio.h" |
|
#include "avfilter.h" |
|
#include "filters.h" |
|
#include "video.h" |
|
#include <float.h> |
|
|
|
typedef struct RealtimeContext { |
|
const AVClass *class; |
|
int64_t delta; |
|
int64_t limit; |
|
double speed; |
|
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) / s->speed; |
|
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 (FFABS(sleep) > s->limit / s->speed) { |
|
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 | AV_OPT_FLAG_RUNTIME_PARAM |
|
static const AVOption options[] = { |
|
{ "limit", "sleep time limit", OFFSET(limit), AV_OPT_TYPE_DURATION, { .i64 = 2000000 }, 0, INT64_MAX, FLAGS }, |
|
{ "speed", "speed factor", OFFSET(speed), AV_OPT_TYPE_DOUBLE, { .dbl = 1.0 }, DBL_MIN, DBL_MAX, FLAGS }, |
|
{ NULL } |
|
}; |
|
|
|
AVFILTER_DEFINE_CLASS_EXT(realtime, "(a)realtime", options); |
|
|
|
#if CONFIG_REALTIME_FILTER |
|
|
|
static const AVFilterPad avfilter_vf_realtime_inputs[] = { |
|
{ |
|
.name = "default", |
|
.type = AVMEDIA_TYPE_VIDEO, |
|
.filter_frame = filter_frame, |
|
}, |
|
}; |
|
|
|
const 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, |
|
.flags = AVFILTER_FLAG_METADATA_ONLY, |
|
FILTER_INPUTS(avfilter_vf_realtime_inputs), |
|
FILTER_OUTPUTS(ff_video_default_filterpad), |
|
.process_command = ff_filter_process_command, |
|
}; |
|
#endif /* CONFIG_REALTIME_FILTER */ |
|
|
|
#if CONFIG_AREALTIME_FILTER |
|
|
|
static const AVFilterPad arealtime_inputs[] = { |
|
{ |
|
.name = "default", |
|
.type = AVMEDIA_TYPE_AUDIO, |
|
.filter_frame = filter_frame, |
|
}, |
|
}; |
|
|
|
const AVFilter ff_af_arealtime = { |
|
.name = "arealtime", |
|
.description = NULL_IF_CONFIG_SMALL("Slow down filtering to match realtime."), |
|
.priv_class = &realtime_class, |
|
.priv_size = sizeof(RealtimeContext), |
|
.flags = AVFILTER_FLAG_METADATA_ONLY, |
|
FILTER_INPUTS(arealtime_inputs), |
|
FILTER_OUTPUTS(ff_audio_default_filterpad), |
|
.process_command = ff_filter_process_command, |
|
}; |
|
#endif /* CONFIG_AREALTIME_FILTER */
|
|
|