| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * SubRip subtitle muxer | ||
| 3 | * Copyright (c) 2012 Nicolas George <nicolas.george@normalesup.org> | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | #include "avformat.h" | ||
| 23 | #include "internal.h" | ||
| 24 | #include "mux.h" | ||
| 25 | #include "libavutil/log.h" | ||
| 26 | #include "libavutil/intreadwrite.h" | ||
| 27 | |||
| 28 | /* TODO: add options for: | ||
| 29 | - character encoding; | ||
| 30 | - LF / CRLF; | ||
| 31 | - byte order mark. | ||
| 32 | */ | ||
| 33 | |||
| 34 | typedef struct SRTContext{ | ||
| 35 | unsigned index; | ||
| 36 | } SRTContext; | ||
| 37 | |||
| 38 | 7 | static int srt_write_header(AVFormatContext *avf) | |
| 39 | { | ||
| 40 | 7 | SRTContext *srt = avf->priv_data; | |
| 41 | |||
| 42 |
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7 | if (avf->streams[0]->codecpar->codec_id != AV_CODEC_ID_TEXT && |
| 43 |
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6 | avf->streams[0]->codecpar->codec_id != AV_CODEC_ID_SUBRIP) { |
| 44 | ✗ | av_log(avf, AV_LOG_ERROR, | |
| 45 | "Unsupported subtitles codec: %s\n", | ||
| 46 | ✗ | avcodec_get_name(avf->streams[0]->codecpar->codec_id)); | |
| 47 | ✗ | return AVERROR(EINVAL); | |
| 48 | } | ||
| 49 | 7 | avpriv_set_pts_info(avf->streams[0], 64, 1, 1000); | |
| 50 | 7 | srt->index = 1; | |
| 51 | 7 | return 0; | |
| 52 | } | ||
| 53 | |||
| 54 | 519 | static int srt_write_packet(AVFormatContext *avf, AVPacket *pkt) | |
| 55 | { | ||
| 56 | 519 | SRTContext *srt = avf->priv_data; | |
| 57 | |||
| 58 | 519 | int64_t s = pkt->pts, e, d = pkt->duration; | |
| 59 | size_t size; | ||
| 60 | 519 | int x1 = -1, y1 = -1, x2 = -1, y2 = -1; | |
| 61 | const uint8_t *p; | ||
| 62 | |||
| 63 | 519 | p = av_packet_get_side_data(pkt, AV_PKT_DATA_SUBTITLE_POSITION, &size); | |
| 64 |
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519 | if (p && size == 16) { |
| 65 | ✗ | x1 = AV_RL32(p ); | |
| 66 | ✗ | y1 = AV_RL32(p + 4); | |
| 67 | ✗ | x2 = AV_RL32(p + 8); | |
| 68 | ✗ | y2 = AV_RL32(p + 12); | |
| 69 | } | ||
| 70 | |||
| 71 |
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519 | if (s == AV_NOPTS_VALUE || d < 0) { |
| 72 | ✗ | av_log(avf, AV_LOG_WARNING, | |
| 73 | "Insufficient timestamps in event number %d.\n", srt->index); | ||
| 74 | ✗ | return 0; | |
| 75 | } | ||
| 76 | 519 | e = s + d; | |
| 77 | 519 | avio_printf(avf->pb, "%d\n%02d:%02d:%02d,%03d --> %02d:%02d:%02d,%03d", | |
| 78 | srt->index, | ||
| 79 | 519 | (int)(s / 3600000), (int)(s / 60000) % 60, | |
| 80 | 519 | (int)(s / 1000) % 60, (int)(s % 1000), | |
| 81 | 519 | (int)(e / 3600000), (int)(e / 60000) % 60, | |
| 82 | 519 | (int)(e / 1000) % 60, (int)(e % 1000)); | |
| 83 |
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519 | if (p) |
| 84 | ✗ | avio_printf(avf->pb, " X1:%03d X2:%03d Y1:%03d Y2:%03d", | |
| 85 | x1, x2, y1, y2); | ||
| 86 | 519 | avio_printf(avf->pb, "\n"); | |
| 87 | |||
| 88 | 519 | avio_write(avf->pb, pkt->data, pkt->size); | |
| 89 | 519 | avio_write(avf->pb, "\n\n", 2); | |
| 90 | 519 | srt->index++; | |
| 91 | 519 | return 0; | |
| 92 | } | ||
| 93 | |||
| 94 | const FFOutputFormat ff_srt_muxer = { | ||
| 95 | .p.name = "srt", | ||
| 96 | .p.long_name = NULL_IF_CONFIG_SMALL("SubRip subtitle"), | ||
| 97 | .p.mime_type = "application/x-subrip", | ||
| 98 | .p.extensions = "srt", | ||
| 99 | .p.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT, | ||
| 100 | .p.video_codec = AV_CODEC_ID_NONE, | ||
| 101 | .p.audio_codec = AV_CODEC_ID_NONE, | ||
| 102 | .p.subtitle_codec = AV_CODEC_ID_SUBRIP, | ||
| 103 | .flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH, | ||
| 104 | .priv_data_size = sizeof(SRTContext), | ||
| 105 | .write_header = srt_write_header, | ||
| 106 | .write_packet = srt_write_packet, | ||
| 107 | }; | ||
| 108 |