| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2018 Marton Balint | ||
| 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 | |||
| 30 | typedef struct CueContext { | ||
| 31 | const AVClass *class; | ||
| 32 | int64_t first_pts; | ||
| 33 | int64_t cue; | ||
| 34 | int64_t preroll; | ||
| 35 | int64_t buffer; | ||
| 36 | int status; | ||
| 37 | } CueContext; | ||
| 38 | |||
| 39 | ✗ | static int activate(AVFilterContext *ctx) | |
| 40 | { | ||
| 41 | ✗ | AVFilterLink *inlink = ctx->inputs[0]; | |
| 42 | ✗ | AVFilterLink *outlink = ctx->outputs[0]; | |
| 43 | ✗ | CueContext *s = ctx->priv; | |
| 44 | |||
| 45 | ✗ | FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink); | |
| 46 | |||
| 47 | ✗ | if (ff_inlink_queued_frames(inlink)) { | |
| 48 | ✗ | AVFrame *frame = ff_inlink_peek_frame(inlink, 0); | |
| 49 | ✗ | int64_t pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q); | |
| 50 | |||
| 51 | ✗ | if (!s->status) { | |
| 52 | ✗ | s->first_pts = pts; | |
| 53 | ✗ | s->status++; | |
| 54 | } | ||
| 55 | ✗ | if (s->status == 1) { | |
| 56 | ✗ | if (pts - s->first_pts < s->preroll) { | |
| 57 | ✗ | int ret = ff_inlink_consume_frame(inlink, &frame); | |
| 58 | ✗ | if (ret < 0) | |
| 59 | ✗ | return ret; | |
| 60 | ✗ | return ff_filter_frame(outlink, frame); | |
| 61 | } | ||
| 62 | ✗ | s->first_pts = pts; | |
| 63 | ✗ | s->status++; | |
| 64 | } | ||
| 65 | ✗ | if (s->status == 2) { | |
| 66 | ✗ | frame = ff_inlink_peek_frame(inlink, ff_inlink_queued_frames(inlink) - 1); | |
| 67 | ✗ | pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q); | |
| 68 | ✗ | if (!(pts - s->first_pts < s->buffer && (av_gettime() - s->cue) < 0)) | |
| 69 | ✗ | s->status++; | |
| 70 | } | ||
| 71 | ✗ | if (s->status == 3) { | |
| 72 | int64_t diff; | ||
| 73 | ✗ | while ((diff = (av_gettime() - s->cue)) < 0) | |
| 74 | ✗ | av_usleep(av_clip(-diff / 2, 100, 1000000)); | |
| 75 | ✗ | s->status++; | |
| 76 | } | ||
| 77 | ✗ | if (s->status == 4) { | |
| 78 | ✗ | int ret = ff_inlink_consume_frame(inlink, &frame); | |
| 79 | ✗ | if (ret < 0) | |
| 80 | ✗ | return ret; | |
| 81 | ✗ | return ff_filter_frame(outlink, frame); | |
| 82 | } | ||
| 83 | } | ||
| 84 | |||
| 85 | ✗ | FF_FILTER_FORWARD_STATUS(inlink, outlink); | |
| 86 | ✗ | FF_FILTER_FORWARD_WANTED(outlink, inlink); | |
| 87 | |||
| 88 | ✗ | return FFERROR_NOT_READY; | |
| 89 | } | ||
| 90 | |||
| 91 | #define OFFSET(x) offsetof(CueContext, x) | ||
| 92 | #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | ||
| 93 | static const AVOption options[] = { | ||
| 94 | { "cue", "cue unix timestamp in microseconds", OFFSET(cue), AV_OPT_TYPE_INT64, { .i64 = 0 }, 0, INT64_MAX, FLAGS }, | ||
| 95 | { "preroll", "preroll duration in seconds", OFFSET(preroll), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT64_MAX, FLAGS }, | ||
| 96 | { "buffer", "buffer duration in seconds", OFFSET(buffer), AV_OPT_TYPE_DURATION, { .i64 = 0 }, 0, INT64_MAX, FLAGS }, | ||
| 97 | { NULL } | ||
| 98 | }; | ||
| 99 | |||
| 100 | AVFILTER_DEFINE_CLASS_EXT(cue_acue, "(a)cue", options); | ||
| 101 | |||
| 102 | #if CONFIG_CUE_FILTER | ||
| 103 | const AVFilter ff_vf_cue = { | ||
| 104 | .name = "cue", | ||
| 105 | .description = NULL_IF_CONFIG_SMALL("Delay filtering to match a cue."), | ||
| 106 | .priv_class = &cue_acue_class, | ||
| 107 | .priv_size = sizeof(CueContext), | ||
| 108 | FILTER_INPUTS(ff_video_default_filterpad), | ||
| 109 | FILTER_OUTPUTS(ff_video_default_filterpad), | ||
| 110 | .activate = activate, | ||
| 111 | }; | ||
| 112 | #endif /* CONFIG_CUE_FILTER */ | ||
| 113 | |||
| 114 | #if CONFIG_ACUE_FILTER | ||
| 115 | const AVFilter ff_af_acue = { | ||
| 116 | .name = "acue", | ||
| 117 | .description = NULL_IF_CONFIG_SMALL("Delay filtering to match a cue."), | ||
| 118 | .priv_class = &cue_acue_class, | ||
| 119 | .priv_size = sizeof(CueContext), | ||
| 120 | .flags = AVFILTER_FLAG_METADATA_ONLY, | ||
| 121 | FILTER_INPUTS(ff_audio_default_filterpad), | ||
| 122 | FILTER_OUTPUTS(ff_audio_default_filterpad), | ||
| 123 | .activate = activate, | ||
| 124 | }; | ||
| 125 | #endif /* CONFIG_ACUE_FILTER */ | ||
| 126 |