| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * SUP muxer | ||
| 3 | * Copyright (c) 2014 Petri Hintukainen <phintuka@users.sourceforge.net> | ||
| 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/intreadwrite.h" | ||
| 26 | |||
| 27 | #define SUP_PGS_MAGIC 0x5047 /* "PG", big endian */ | ||
| 28 | |||
| 29 | 10 | static int sup_write_packet(AVFormatContext *s, AVPacket *pkt) | |
| 30 | { | ||
| 31 | 10 | const uint8_t *data = pkt->data; | |
| 32 | 10 | size_t size = pkt->size; | |
| 33 | 10 | uint32_t pts = 0, dts = 0; | |
| 34 | |||
| 35 |
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10 | if (pkt->pts != AV_NOPTS_VALUE) { |
| 36 | 10 | pts = pkt->pts; | |
| 37 | } | ||
| 38 |
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10 | if (pkt->dts != AV_NOPTS_VALUE) { |
| 39 | 10 | dts = pkt->dts; | |
| 40 | } | ||
| 41 | |||
| 42 | /* | ||
| 43 | Split frame to segments. | ||
| 44 | mkvmerge stores multiple segments in one frame. | ||
| 45 | */ | ||
| 46 |
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20 | while (size > 2) { |
| 47 | 10 | size_t len = AV_RB16(data + 1) + 3; | |
| 48 | |||
| 49 |
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10 | if (len > size) { |
| 50 | ✗ | av_log(s, AV_LOG_ERROR, "Not enough data, skipping %"SIZE_SPECIFIER" bytes\n", | |
| 51 | size); | ||
| 52 | ✗ | return AVERROR_INVALIDDATA; | |
| 53 | } | ||
| 54 | |||
| 55 | /* header */ | ||
| 56 | 10 | avio_wb16(s->pb, SUP_PGS_MAGIC); | |
| 57 | 10 | avio_wb32(s->pb, pts); | |
| 58 | 10 | avio_wb32(s->pb, dts); | |
| 59 | |||
| 60 | 10 | avio_write(s->pb, data, len); | |
| 61 | |||
| 62 | 10 | data += len; | |
| 63 | 10 | size -= len; | |
| 64 | } | ||
| 65 | |||
| 66 |
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10 | if (size > 0) { |
| 67 | ✗ | av_log(s, AV_LOG_ERROR, "Skipping %"SIZE_SPECIFIER" bytes after last segment in frame\n", | |
| 68 | size); | ||
| 69 | ✗ | return AVERROR_INVALIDDATA; | |
| 70 | } | ||
| 71 | |||
| 72 | 10 | return 0; | |
| 73 | } | ||
| 74 | |||
| 75 | 1 | static av_cold int sup_init(AVFormatContext *s) | |
| 76 | { | ||
| 77 | 1 | avpriv_set_pts_info(s->streams[0], 32, 1, 90000); | |
| 78 | |||
| 79 | 1 | return 0; | |
| 80 | } | ||
| 81 | |||
| 82 | const FFOutputFormat ff_sup_muxer = { | ||
| 83 | .p.name = "sup", | ||
| 84 | .p.long_name = NULL_IF_CONFIG_SMALL("raw HDMV Presentation Graphic Stream subtitles"), | ||
| 85 | .p.extensions = "sup", | ||
| 86 | .p.mime_type = "application/x-pgs", | ||
| 87 | .p.video_codec = AV_CODEC_ID_NONE, | ||
| 88 | .p.audio_codec = AV_CODEC_ID_NONE, | ||
| 89 | .p.subtitle_codec = AV_CODEC_ID_HDMV_PGS_SUBTITLE, | ||
| 90 | .p.flags = AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT, | ||
| 91 | .flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH, | ||
| 92 | .init = sup_init, | ||
| 93 | .write_packet = sup_write_packet, | ||
| 94 | }; | ||
| 95 |