| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * SSA/ASS encoder | ||
| 3 | * Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.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 "config_components.h" | ||
| 23 | |||
| 24 | #include <string.h> | ||
| 25 | |||
| 26 | #include "avcodec.h" | ||
| 27 | #include "ass.h" | ||
| 28 | #include "codec_internal.h" | ||
| 29 | #include "libavutil/avstring.h" | ||
| 30 | #include "libavutil/internal.h" | ||
| 31 | #include "libavutil/mem.h" | ||
| 32 | |||
| 33 | 25 | static av_cold int ass_encode_init(AVCodecContext *avctx) | |
| 34 | { | ||
| 35 | 25 | avctx->extradata = av_malloc(avctx->subtitle_header_size + 1); | |
| 36 |
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25 | if (!avctx->extradata) |
| 37 | ✗ | return AVERROR(ENOMEM); | |
| 38 | 25 | memcpy(avctx->extradata, avctx->subtitle_header, avctx->subtitle_header_size); | |
| 39 | 25 | avctx->extradata_size = avctx->subtitle_header_size; | |
| 40 | 25 | avctx->extradata[avctx->extradata_size] = 0; | |
| 41 | 25 | return 0; | |
| 42 | } | ||
| 43 | |||
| 44 | 450 | static int ass_encode_frame(AVCodecContext *avctx, | |
| 45 | unsigned char *buf, int bufsize, | ||
| 46 | const AVSubtitle *sub) | ||
| 47 | { | ||
| 48 | size_t len; | ||
| 49 | |||
| 50 |
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450 | if (sub->num_rects != 1) { |
| 51 | ✗ | av_log(avctx, AV_LOG_ERROR, "Only one rect per AVSubtitle is supported in ASS.\n"); | |
| 52 | ✗ | return AVERROR_INVALIDDATA; | |
| 53 | } | ||
| 54 | |||
| 55 |
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450 | if (sub->rects[0]->type != SUBTITLE_ASS) { |
| 56 | ✗ | av_log(avctx, AV_LOG_ERROR, "Only SUBTITLE_ASS type supported.\n"); | |
| 57 | ✗ | return AVERROR(EINVAL); | |
| 58 | } | ||
| 59 | |||
| 60 | 450 | len = av_strlcpy(buf, sub->rects[0]->ass, bufsize); | |
| 61 | |||
| 62 |
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450 | if (len >= bufsize) { |
| 63 | ✗ | av_log(avctx, AV_LOG_ERROR, "Buffer too small for ASS event.\n"); | |
| 64 | ✗ | return AVERROR_BUFFER_TOO_SMALL; | |
| 65 | } | ||
| 66 | |||
| 67 | 450 | return len; | |
| 68 | } | ||
| 69 | |||
| 70 | #if CONFIG_SSA_ENCODER | ||
| 71 | const FFCodec ff_ssa_encoder = { | ||
| 72 | .p.name = "ssa", | ||
| 73 | CODEC_LONG_NAME("ASS (Advanced SubStation Alpha) subtitle"), | ||
| 74 | .p.type = AVMEDIA_TYPE_SUBTITLE, | ||
| 75 | .p.id = AV_CODEC_ID_ASS, | ||
| 76 | .init = ass_encode_init, | ||
| 77 | FF_CODEC_ENCODE_SUB_CB(ass_encode_frame), | ||
| 78 | }; | ||
| 79 | #endif | ||
| 80 | |||
| 81 | #if CONFIG_ASS_ENCODER | ||
| 82 | const FFCodec ff_ass_encoder = { | ||
| 83 | .p.name = "ass", | ||
| 84 | CODEC_LONG_NAME("ASS (Advanced SubStation Alpha) subtitle"), | ||
| 85 | .p.type = AVMEDIA_TYPE_SUBTITLE, | ||
| 86 | .p.id = AV_CODEC_ID_ASS, | ||
| 87 | .init = ass_encode_init, | ||
| 88 | FF_CODEC_ENCODE_SUB_CB(ass_encode_frame), | ||
| 89 | }; | ||
| 90 | #endif | ||
| 91 |