LCOV - code coverage report
Current view: top level - src/libavfilter - f_realtime.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 21 0.0 %
Date: 2017-07-21 15:41:20 Functions: 0 1 0.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2015 Nicolas George
       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 License
       8             :  * 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
      14             :  * GNU Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public License
      17             :  * along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
      18             :  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : #include "libavutil/opt.h"
      22             : #include "libavutil/time.h"
      23             : #include "avfilter.h"
      24             : #include "internal.h"
      25             : 
      26             : typedef struct RealtimeContext {
      27             :     const AVClass *class;
      28             :     int64_t delta;
      29             :     int64_t limit;
      30             :     unsigned inited;
      31             : } RealtimeContext;
      32             : 
      33           0 : static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
      34             : {
      35           0 :     AVFilterContext *ctx = inlink->dst;
      36           0 :     RealtimeContext *s = ctx->priv;
      37             : 
      38           0 :     if (frame->pts != AV_NOPTS_VALUE) {
      39           0 :         int64_t pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q);
      40           0 :         int64_t now = av_gettime_relative();
      41           0 :         int64_t sleep = pts - now + s->delta;
      42           0 :         if (!s->inited) {
      43           0 :             s->inited = 1;
      44           0 :             sleep = 0;
      45           0 :             s->delta = now - pts;
      46             :         }
      47           0 :         if (sleep > s->limit || sleep < -s->limit) {
      48           0 :             av_log(ctx, AV_LOG_WARNING,
      49             :                    "time discontinuity detected: %"PRIi64" us, resetting\n",
      50             :                    sleep);
      51           0 :             sleep = 0;
      52           0 :             s->delta = now - pts;
      53             :         }
      54           0 :         if (sleep > 0) {
      55           0 :             av_log(ctx, AV_LOG_DEBUG, "sleeping %"PRIi64" us\n", sleep);
      56           0 :             for (; sleep > 600000000; sleep -= 600000000)
      57           0 :                 av_usleep(600000000);
      58           0 :             av_usleep(sleep);
      59             :         }
      60             :     }
      61           0 :     return ff_filter_frame(inlink->dst->outputs[0], frame);
      62             : }
      63             : 
      64             : #define OFFSET(x) offsetof(RealtimeContext, x)
      65             : #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
      66             : static const AVOption options[] = {
      67             :     { "limit", "sleep time limit", OFFSET(limit), AV_OPT_TYPE_DURATION, { .i64 = 2000000 }, 0, INT64_MAX, FLAGS },
      68             :     { NULL }
      69             : };
      70             : 
      71             : #if CONFIG_REALTIME_FILTER
      72             : #define realtime_options options
      73             : AVFILTER_DEFINE_CLASS(realtime);
      74             : 
      75             : static const AVFilterPad avfilter_vf_realtime_inputs[] = {
      76             :     {
      77             :         .name         = "default",
      78             :         .type         = AVMEDIA_TYPE_VIDEO,
      79             :         .filter_frame = filter_frame,
      80             :     },
      81             :     { NULL }
      82             : };
      83             : 
      84             : static const AVFilterPad avfilter_vf_realtime_outputs[] = {
      85             :     {
      86             :         .name = "default",
      87             :         .type = AVMEDIA_TYPE_VIDEO,
      88             :     },
      89             :     { NULL }
      90             : };
      91             : 
      92             : AVFilter ff_vf_realtime = {
      93             :     .name        = "realtime",
      94             :     .description = NULL_IF_CONFIG_SMALL("Slow down filtering to match realtime."),
      95             :     .priv_size   = sizeof(RealtimeContext),
      96             :     .priv_class  = &realtime_class,
      97             :     .inputs      = avfilter_vf_realtime_inputs,
      98             :     .outputs     = avfilter_vf_realtime_outputs,
      99             : };
     100             : #endif /* CONFIG_REALTIME_FILTER */
     101             : 
     102             : #if CONFIG_AREALTIME_FILTER
     103             : 
     104             : #define arealtime_options options
     105             : AVFILTER_DEFINE_CLASS(arealtime);
     106             : 
     107             : static const AVFilterPad arealtime_inputs[] = {
     108             :     {
     109             :         .name         = "default",
     110             :         .type         = AVMEDIA_TYPE_AUDIO,
     111             :         .filter_frame = filter_frame,
     112             :     },
     113             :     { NULL }
     114             : };
     115             : 
     116             : static const AVFilterPad arealtime_outputs[] = {
     117             :     {
     118             :         .name = "default",
     119             :         .type = AVMEDIA_TYPE_AUDIO,
     120             :     },
     121             :     { NULL }
     122             : };
     123             : 
     124             : AVFilter ff_af_arealtime = {
     125             :     .name        = "arealtime",
     126             :     .description = NULL_IF_CONFIG_SMALL("Slow down filtering to match realtime."),
     127             :     .priv_size   = sizeof(RealtimeContext),
     128             :     .priv_class  = &arealtime_class,
     129             :     .inputs      = arealtime_inputs,
     130             :     .outputs     = arealtime_outputs,
     131             : };
     132             : #endif /* CONFIG_AREALTIME_FILTER */

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