| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2013 Matthew Heaney | ||
| 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 | ||
| 8 | * License 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 GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | /** | ||
| 22 | * @file | ||
| 23 | * WebVTT subtitle muxer | ||
| 24 | * @see http://dev.w3.org/html5/webvtt/ | ||
| 25 | */ | ||
| 26 | |||
| 27 | #include "avformat.h" | ||
| 28 | #include "internal.h" | ||
| 29 | #include "mux.h" | ||
| 30 | |||
| 31 | 74 | static void webvtt_write_time(AVIOContext *pb, int64_t millisec) | |
| 32 | { | ||
| 33 | int64_t sec, min, hour; | ||
| 34 | 74 | sec = millisec / 1000; | |
| 35 | 74 | millisec -= 1000 * sec; | |
| 36 | 74 | min = sec / 60; | |
| 37 | 74 | sec -= 60 * min; | |
| 38 | 74 | hour = min / 60; | |
| 39 | 74 | min -= 60 * hour; | |
| 40 | |||
| 41 |
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74 | if (hour > 0) |
| 42 | ✗ | avio_printf(pb, "%02"PRId64":", hour); | |
| 43 | |||
| 44 | 74 | avio_printf(pb, "%02"PRId64":%02"PRId64".%03"PRId64"", min, sec, millisec); | |
| 45 | 74 | } | |
| 46 | |||
| 47 | 1 | static int webvtt_write_header(AVFormatContext *ctx) | |
| 48 | { | ||
| 49 | 1 | AVStream *s = ctx->streams[0]; | |
| 50 | 1 | AVIOContext *pb = ctx->pb; | |
| 51 | |||
| 52 | 1 | avpriv_set_pts_info(s, 64, 1, 1000); | |
| 53 | |||
| 54 | 1 | avio_printf(pb, "WEBVTT\n"); | |
| 55 | |||
| 56 | 1 | return 0; | |
| 57 | } | ||
| 58 | |||
| 59 | 37 | static int webvtt_write_packet(AVFormatContext *ctx, AVPacket *pkt) | |
| 60 | { | ||
| 61 | 37 | AVIOContext *pb = ctx->pb; | |
| 62 | size_t id_size, settings_size; | ||
| 63 | int id_size_int, settings_size_int; | ||
| 64 | uint8_t *id, *settings; | ||
| 65 | |||
| 66 | 37 | avio_printf(pb, "\n"); | |
| 67 | |||
| 68 | 37 | id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER, | |
| 69 | &id_size); | ||
| 70 | |||
| 71 |
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37 | if (id_size > INT_MAX) |
| 72 | ✗ | return AVERROR(EINVAL); | |
| 73 | |||
| 74 | 37 | id_size_int = id_size; | |
| 75 |
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37 | if (id && id_size_int > 0) |
| 76 | ✗ | avio_printf(pb, "%.*s\n", id_size_int, id); | |
| 77 | |||
| 78 | 37 | webvtt_write_time(pb, pkt->pts); | |
| 79 | 37 | avio_printf(pb, " --> "); | |
| 80 | 37 | webvtt_write_time(pb, pkt->pts + pkt->duration); | |
| 81 | |||
| 82 | 37 | settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS, | |
| 83 | &settings_size); | ||
| 84 | |||
| 85 |
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37 | if (settings_size > INT_MAX) |
| 86 | ✗ | return AVERROR(EINVAL); | |
| 87 | |||
| 88 | 37 | settings_size_int = settings_size; | |
| 89 |
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37 | if (settings && settings_size_int > 0) |
| 90 | ✗ | avio_printf(pb, " %.*s", settings_size_int, settings); | |
| 91 | |||
| 92 | 37 | avio_printf(pb, "\n"); | |
| 93 | |||
| 94 | 37 | avio_write(pb, pkt->data, pkt->size); | |
| 95 | 37 | avio_printf(pb, "\n"); | |
| 96 | |||
| 97 | 37 | return 0; | |
| 98 | } | ||
| 99 | |||
| 100 | const FFOutputFormat ff_webvtt_muxer = { | ||
| 101 | .p.name = "webvtt", | ||
| 102 | .p.long_name = NULL_IF_CONFIG_SMALL("WebVTT subtitle"), | ||
| 103 | .p.extensions = "vtt", | ||
| 104 | .p.mime_type = "text/vtt", | ||
| 105 | .p.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT, | ||
| 106 | .p.video_codec = AV_CODEC_ID_NONE, | ||
| 107 | .p.audio_codec = AV_CODEC_ID_NONE, | ||
| 108 | .p.subtitle_codec = AV_CODEC_ID_WEBVTT, | ||
| 109 | .write_header = webvtt_write_header, | ||
| 110 | .write_packet = webvtt_write_packet, | ||
| 111 | .flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH | | ||
| 112 | FF_OFMT_FLAG_ONLY_DEFAULT_CODECS, | ||
| 113 | }; | ||
| 114 |