| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 "config_components.h" | ||
| 22 | |||
| 23 | #include "libavutil/opt.h" | ||
| 24 | #include "libavutil/time.h" | ||
| 25 | #include "audio.h" | ||
| 26 | #include "avfilter.h" | ||
| 27 | #include "filters.h" | ||
| 28 | #include "video.h" | ||
| 29 | #include <float.h> | ||
| 30 | |||
| 31 | typedef struct RealtimeContext { | ||
| 32 | const AVClass *class; | ||
| 33 | int64_t delta; | ||
| 34 | int64_t limit; | ||
| 35 | double speed; | ||
| 36 | unsigned inited; | ||
| 37 | } RealtimeContext; | ||
| 38 | |||
| 39 | ✗ | static int filter_frame(AVFilterLink *inlink, AVFrame *frame) | |
| 40 | { | ||
| 41 | ✗ | AVFilterContext *ctx = inlink->dst; | |
| 42 | ✗ | RealtimeContext *s = ctx->priv; | |
| 43 | |||
| 44 | ✗ | if (frame->pts != AV_NOPTS_VALUE) { | |
| 45 | ✗ | int64_t pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q) / s->speed; | |
| 46 | ✗ | int64_t now = av_gettime_relative(); | |
| 47 | ✗ | int64_t sleep = pts - now + s->delta; | |
| 48 | ✗ | if (!s->inited) { | |
| 49 | ✗ | s->inited = 1; | |
| 50 | ✗ | sleep = 0; | |
| 51 | ✗ | s->delta = now - pts; | |
| 52 | } | ||
| 53 | ✗ | if (FFABS(sleep) > s->limit / s->speed) { | |
| 54 | ✗ | av_log(ctx, AV_LOG_WARNING, | |
| 55 | "time discontinuity detected: %"PRIi64" us, resetting\n", | ||
| 56 | sleep); | ||
| 57 | ✗ | sleep = 0; | |
| 58 | ✗ | s->delta = now - pts; | |
| 59 | } | ||
| 60 | ✗ | if (sleep > 0) { | |
| 61 | ✗ | av_log(ctx, AV_LOG_DEBUG, "sleeping %"PRIi64" us\n", sleep); | |
| 62 | ✗ | for (; sleep > 600000000; sleep -= 600000000) | |
| 63 | ✗ | av_usleep(600000000); | |
| 64 | ✗ | av_usleep(sleep); | |
| 65 | } | ||
| 66 | } | ||
| 67 | ✗ | return ff_filter_frame(inlink->dst->outputs[0], frame); | |
| 68 | } | ||
| 69 | |||
| 70 | #define OFFSET(x) offsetof(RealtimeContext, x) | ||
| 71 | #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM | ||
| 72 | static const AVOption options[] = { | ||
| 73 | { "limit", "sleep time limit", OFFSET(limit), AV_OPT_TYPE_DURATION, { .i64 = 2000000 }, 0, INT64_MAX, FLAGS }, | ||
| 74 | { "speed", "speed factor", OFFSET(speed), AV_OPT_TYPE_DOUBLE, { .dbl = 1.0 }, DBL_MIN, DBL_MAX, FLAGS }, | ||
| 75 | { NULL } | ||
| 76 | }; | ||
| 77 | |||
| 78 | AVFILTER_DEFINE_CLASS_EXT(realtime, "(a)realtime", options); | ||
| 79 | |||
| 80 | #if CONFIG_REALTIME_FILTER | ||
| 81 | |||
| 82 | static const AVFilterPad avfilter_vf_realtime_inputs[] = { | ||
| 83 | { | ||
| 84 | .name = "default", | ||
| 85 | .type = AVMEDIA_TYPE_VIDEO, | ||
| 86 | .filter_frame = filter_frame, | ||
| 87 | }, | ||
| 88 | }; | ||
| 89 | |||
| 90 | const AVFilter ff_vf_realtime = { | ||
| 91 | .name = "realtime", | ||
| 92 | .description = NULL_IF_CONFIG_SMALL("Slow down filtering to match realtime."), | ||
| 93 | .priv_size = sizeof(RealtimeContext), | ||
| 94 | .priv_class = &realtime_class, | ||
| 95 | .flags = AVFILTER_FLAG_METADATA_ONLY, | ||
| 96 | FILTER_INPUTS(avfilter_vf_realtime_inputs), | ||
| 97 | FILTER_OUTPUTS(ff_video_default_filterpad), | ||
| 98 | .process_command = ff_filter_process_command, | ||
| 99 | }; | ||
| 100 | #endif /* CONFIG_REALTIME_FILTER */ | ||
| 101 | |||
| 102 | #if CONFIG_AREALTIME_FILTER | ||
| 103 | |||
| 104 | static const AVFilterPad arealtime_inputs[] = { | ||
| 105 | { | ||
| 106 | .name = "default", | ||
| 107 | .type = AVMEDIA_TYPE_AUDIO, | ||
| 108 | .filter_frame = filter_frame, | ||
| 109 | }, | ||
| 110 | }; | ||
| 111 | |||
| 112 | const AVFilter ff_af_arealtime = { | ||
| 113 | .name = "arealtime", | ||
| 114 | .description = NULL_IF_CONFIG_SMALL("Slow down filtering to match realtime."), | ||
| 115 | .priv_class = &realtime_class, | ||
| 116 | .priv_size = sizeof(RealtimeContext), | ||
| 117 | .flags = AVFILTER_FLAG_METADATA_ONLY, | ||
| 118 | FILTER_INPUTS(arealtime_inputs), | ||
| 119 | FILTER_OUTPUTS(ff_audio_default_filterpad), | ||
| 120 | .process_command = ff_filter_process_command, | ||
| 121 | }; | ||
| 122 | #endif /* CONFIG_AREALTIME_FILTER */ | ||
| 123 |