| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * SubRip subtitle decoder | ||
| 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 "libavutil/avstring.h" | ||
| 25 | #include "libavutil/common.h" | ||
| 26 | #include "libavutil/intreadwrite.h" | ||
| 27 | #include "libavutil/parseutils.h" | ||
| 28 | #include "avcodec.h" | ||
| 29 | #include "ass.h" | ||
| 30 | #include "codec_internal.h" | ||
| 31 | #include "htmlsubtitles.h" | ||
| 32 | |||
| 33 | 232 | static int srt_to_ass(AVCodecContext *avctx, AVBPrint *dst, | |
| 34 | const char *in, int x1, int y1, int x2, int y2) | ||
| 35 | { | ||
| 36 |
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232 | if (x1 >= 0 && y1 >= 0) { |
| 37 | /* XXX: here we rescale coordinate assuming they are in DVD resolution | ||
| 38 | * (720x480) since we don't have anything better */ | ||
| 39 | |||
| 40 |
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12 | if (x2 >= 0 && y2 >= 0 && (x2 != x1 || y2 != y1) && x2 >= x1 && y2 >= y1) { |
| 41 | /* text rectangle defined, write the text at the center of the rectangle */ | ||
| 42 | 6 | const int cx = x1 + (x2 - x1)/2; | |
| 43 | 6 | const int cy = y1 + (y2 - y1)/2; | |
| 44 | 6 | const int scaled_x = cx * (int64_t)ASS_DEFAULT_PLAYRESX / 720; | |
| 45 | 6 | const int scaled_y = cy * (int64_t)ASS_DEFAULT_PLAYRESY / 480; | |
| 46 | 6 | av_bprintf(dst, "{\\an5}{\\pos(%d,%d)}", scaled_x, scaled_y); | |
| 47 | } else { | ||
| 48 | /* only the top left corner, assume the text starts in that corner */ | ||
| 49 | ✗ | const int scaled_x = x1 * (int64_t)ASS_DEFAULT_PLAYRESX / 720; | |
| 50 | ✗ | const int scaled_y = y1 * (int64_t)ASS_DEFAULT_PLAYRESY / 480; | |
| 51 | ✗ | av_bprintf(dst, "{\\an1}{\\pos(%d,%d)}", scaled_x, scaled_y); | |
| 52 | } | ||
| 53 | } | ||
| 54 | |||
| 55 | 232 | return ff_htmlmarkup_to_ass(avctx, dst, in); | |
| 56 | } | ||
| 57 | |||
| 58 | 232 | static int srt_decode_frame(AVCodecContext *avctx, AVSubtitle *sub, | |
| 59 | int *got_sub_ptr, const AVPacket *avpkt) | ||
| 60 | { | ||
| 61 | AVBPrint buffer; | ||
| 62 | 232 | int x1 = -1, y1 = -1, x2 = -1, y2 = -1; | |
| 63 | int ret; | ||
| 64 | size_t size; | ||
| 65 | 232 | const uint8_t *p = av_packet_get_side_data(avpkt, AV_PKT_DATA_SUBTITLE_POSITION, &size); | |
| 66 | 232 | FFASSDecoderContext *s = avctx->priv_data; | |
| 67 | |||
| 68 |
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232 | if (p && size == 16) { |
| 69 | 6 | x1 = AV_RL32(p ); | |
| 70 | 6 | y1 = AV_RL32(p + 4); | |
| 71 | 6 | x2 = AV_RL32(p + 8); | |
| 72 | 6 | y2 = AV_RL32(p + 12); | |
| 73 | } | ||
| 74 | |||
| 75 |
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232 | if (avpkt->size <= 0) |
| 76 | ✗ | return avpkt->size; | |
| 77 | |||
| 78 | 232 | av_bprint_init(&buffer, 0, AV_BPRINT_SIZE_UNLIMITED); | |
| 79 | |||
| 80 | 232 | ret = srt_to_ass(avctx, &buffer, avpkt->data, x1, y1, x2, y2); | |
| 81 |
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232 | if (ret >= 0) |
| 82 | 232 | ret = ff_ass_add_rect(sub, buffer.str, s->readorder++, 0, NULL, NULL); | |
| 83 | 232 | av_bprint_finalize(&buffer, NULL); | |
| 84 |
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232 | if (ret < 0) |
| 85 | ✗ | return ret; | |
| 86 | |||
| 87 | 232 | *got_sub_ptr = sub->num_rects > 0; | |
| 88 | 232 | return avpkt->size; | |
| 89 | } | ||
| 90 | |||
| 91 | #if CONFIG_SRT_DECODER | ||
| 92 | /* deprecated decoder */ | ||
| 93 | const FFCodec ff_srt_decoder = { | ||
| 94 | .p.name = "srt", | ||
| 95 | CODEC_LONG_NAME("SubRip subtitle"), | ||
| 96 | .p.type = AVMEDIA_TYPE_SUBTITLE, | ||
| 97 | .p.id = AV_CODEC_ID_SUBRIP, | ||
| 98 | .init = ff_ass_subtitle_header_default, | ||
| 99 | FF_CODEC_DECODE_SUB_CB(srt_decode_frame), | ||
| 100 | .flush = ff_ass_decoder_flush, | ||
| 101 | .priv_data_size = sizeof(FFASSDecoderContext), | ||
| 102 | }; | ||
| 103 | #endif | ||
| 104 | |||
| 105 | #if CONFIG_SUBRIP_DECODER | ||
| 106 | const FFCodec ff_subrip_decoder = { | ||
| 107 | .p.name = "subrip", | ||
| 108 | CODEC_LONG_NAME("SubRip subtitle"), | ||
| 109 | .p.type = AVMEDIA_TYPE_SUBTITLE, | ||
| 110 | .p.id = AV_CODEC_ID_SUBRIP, | ||
| 111 | .init = ff_ass_subtitle_header_default, | ||
| 112 | FF_CODEC_DECODE_SUB_CB(srt_decode_frame), | ||
| 113 | .flush = ff_ass_decoder_flush, | ||
| 114 | .priv_data_size = sizeof(FFASSDecoderContext), | ||
| 115 | }; | ||
| 116 | #endif | ||
| 117 |