| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * SCC muxer | ||
| 3 | * Copyright (c) 2017 Paul B Mahol | ||
| 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 | typedef struct SCCContext { | ||
| 29 | int prev_h, prev_m, prev_s, prev_f; | ||
| 30 | int inside; | ||
| 31 | int n; | ||
| 32 | } SCCContext; | ||
| 33 | |||
| 34 | 1 | static int scc_write_header(AVFormatContext *avf) | |
| 35 | { | ||
| 36 | 1 | SCCContext *scc = avf->priv_data; | |
| 37 | |||
| 38 | 1 | avpriv_set_pts_info(avf->streams[0], 64, 1, 1000); | |
| 39 | 1 | avio_printf(avf->pb, "Scenarist_SCC V1.0\n"); | |
| 40 | |||
| 41 | 1 | scc->prev_h = scc->prev_m = scc->prev_s = scc->prev_f = -1; | |
| 42 | 1 | scc->inside = 0; | |
| 43 | |||
| 44 | 1 | return 0; | |
| 45 | } | ||
| 46 | |||
| 47 | 32 | static int scc_write_packet(AVFormatContext *avf, AVPacket *pkt) | |
| 48 | { | ||
| 49 | 32 | SCCContext *scc = avf->priv_data; | |
| 50 | 32 | int64_t pts = pkt->pts; | |
| 51 | int i, h, m, s, f; | ||
| 52 | |||
| 53 |
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32 | if (pts == AV_NOPTS_VALUE) { |
| 54 | ✗ | av_log(avf, AV_LOG_WARNING, | |
| 55 | "Insufficient timestamps.\n"); | ||
| 56 | ✗ | return 0; | |
| 57 | } | ||
| 58 | |||
| 59 | 32 | h = (int)(pts / (3600000)); | |
| 60 | 32 | m = (int)(pts / (60000)) % 60; | |
| 61 | 32 | s = (int)(pts / 1000) % 60; | |
| 62 | 32 | f = (int)(pts % 1000) / 33; | |
| 63 | |||
| 64 |
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32 | for (i = 0; i < pkt->size - 2; i+=3) { |
| 65 |
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32 | if (pkt->data[i] == 0xfc && ((pkt->data[i + 1] != 0x80 || pkt->data[i + 2] != 0x80))) |
| 66 | break; | ||
| 67 | } | ||
| 68 |
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32 | if (i >= pkt->size - 2) |
| 69 | ✗ | return 0; | |
| 70 | |||
| 71 |
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32 | if (!scc->inside && (scc->prev_h != h || scc->prev_m != m || scc->prev_s != s || scc->prev_f != f)) { |
| 72 | 32 | avio_printf(avf->pb, "\n%02d:%02d:%02d:%02d\t", h, m, s, f); | |
| 73 | 32 | scc->inside = 1; | |
| 74 | } | ||
| 75 |
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854 | for (i = 0; i < pkt->size; i+=3) { |
| 76 |
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822 | if (i + 3 > pkt->size) |
| 77 | ✗ | break; | |
| 78 | |||
| 79 |
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822 | if (pkt->data[i] != 0xfc || (pkt->data[i + 1] == 0x80 && pkt->data[i + 2] == 0x80)) |
| 80 | ✗ | continue; | |
| 81 |
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822 | if (!scc->inside) { |
| 82 | ✗ | avio_printf(avf->pb, "\n%02d:%02d:%02d:%02d\t", h, m, s, f); | |
| 83 | ✗ | scc->inside = 1; | |
| 84 | } | ||
| 85 |
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822 | if (scc->n > 0) |
| 86 | 790 | avio_w8(avf->pb, ' '); | |
| 87 | 822 | avio_printf(avf->pb, "%02x%02x", pkt->data[i + 1], pkt->data[i + 2]); | |
| 88 | 822 | scc->n++; | |
| 89 | } | ||
| 90 |
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32 | if (scc->inside && (scc->prev_h != h || scc->prev_m != m || scc->prev_s != s || scc->prev_f != f)) { |
| 91 | 32 | avio_w8(avf->pb, '\n'); | |
| 92 | 32 | scc->n = 0; | |
| 93 | 32 | scc->inside = 0; | |
| 94 | } | ||
| 95 | |||
| 96 | 32 | scc->prev_h = h; | |
| 97 | 32 | scc->prev_m = m; | |
| 98 | 32 | scc->prev_s = s; | |
| 99 | 32 | scc->prev_f = f; | |
| 100 | 32 | return 0; | |
| 101 | } | ||
| 102 | |||
| 103 | const FFOutputFormat ff_scc_muxer = { | ||
| 104 | .p.name = "scc", | ||
| 105 | .p.long_name = NULL_IF_CONFIG_SMALL("Scenarist Closed Captions"), | ||
| 106 | .p.extensions = "scc", | ||
| 107 | .p.flags = AVFMT_GLOBALHEADER | AVFMT_VARIABLE_FPS | AVFMT_TS_NONSTRICT, | ||
| 108 | .p.video_codec = AV_CODEC_ID_NONE, | ||
| 109 | .p.audio_codec = AV_CODEC_ID_NONE, | ||
| 110 | .p.subtitle_codec = AV_CODEC_ID_EIA_608, | ||
| 111 | .flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH | | ||
| 112 | FF_OFMT_FLAG_ONLY_DEFAULT_CODECS, | ||
| 113 | .priv_data_size = sizeof(SCCContext), | ||
| 114 | .write_header = scc_write_header, | ||
| 115 | .write_packet = scc_write_packet, | ||
| 116 | }; | ||
| 117 |