repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
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 | ||
| 30 | static void webvtt_write_time(AVIOContext *pb, int64_t millisec) | |
| 31 | { | |
| 32 | int64_t sec, min, hour; | |
| 33 | sec = millisec / 1000; | |
| 34 | millisec -= 1000 * sec; | |
| 35 | min = sec / 60; | |
| 36 | sec -= 60 * min; | |
| 37 | hour = min / 60; | |
| 38 | min -= 60 * hour; | |
| 39 | ||
| 40 | if (hour > 0) | |
| 41 | avio_printf(pb, "%"PRId64":", hour); | |
| 42 | ||
| 43 | avio_printf(pb, "%02"PRId64":%02"PRId64".%03"PRId64"", min, sec, millisec); | |
| 44 | } | |
| 45 | ||
| 46 | static int webvtt_write_header(AVFormatContext *ctx) | |
| 47 | { | |
| 48 | AVStream *s = ctx->streams[0]; | |
| 49 | AVIOContext *pb = ctx->pb; | |
| 50 | ||
| 51 | avpriv_set_pts_info(s, 64, 1, 1000); | |
| 52 | ||
| 53 | avio_printf(pb, "WEBVTT\n"); | |
| 54 | avio_flush(pb); | |
| 55 | ||
| 56 | return 0; | |
| 57 | } | |
| 58 | ||
| 59 | static int webvtt_write_packet(AVFormatContext *ctx, AVPacket *pkt) | |
| 60 | { | |
| 61 | AVIOContext *pb = ctx->pb; | |
| 62 | int id_size, settings_size; | |
| 63 | uint8_t *id, *settings; | |
| 64 | ||
| 65 | avio_printf(pb, "\n"); | |
| 66 | ||
| 67 | id = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_IDENTIFIER, | |
| 68 | &id_size); | |
| 69 | ||
| 70 | if (id && id_size > 0) | |
| 71 | avio_printf(pb, "%.*s\n", id_size, id); | |
| 72 | ||
| 73 | webvtt_write_time(pb, pkt->pts); | |
| 74 | avio_printf(pb, " --> "); | |
| 75 | webvtt_write_time(pb, pkt->pts + pkt->duration); | |
| 76 | ||
| 77 | settings = av_packet_get_side_data(pkt, AV_PKT_DATA_WEBVTT_SETTINGS, | |
| 78 | &settings_size); | |
| 79 | ||
| 80 | if (settings && settings_size > 0) | |
| 81 | avio_printf(pb, " %.*s", settings_size, settings); | |
| 82 | ||
| 83 | avio_printf(pb, "\n"); | |
| 84 | ||
| 85 | avio_write(pb, pkt->data, pkt->size); | |
| 86 | avio_printf(pb, "\n"); | |
| 87 | ||
| 88 | return 0; | |
| 89 | } | |
| 90 | ||
| 91 | AVOutputFormat ff_webvtt_muxer = { | |
| 92 | .name = "webvtt", | |
| 93 | .long_name = NULL_IF_CONFIG_SMALL("WebVTT subtitle"), | |
| 94 | .extensions = "vtt", | |
| 95 | .mime_type = "text/vtt", | |
| 96 | .flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT, | |
| 97 | .subtitle_codec = AV_CODEC_ID_WEBVTT, | |
| 98 | .write_header = webvtt_write_header, | |
| 99 | .write_packet = webvtt_write_packet, | |
| 100 | }; |