diff options
Diffstat (limited to 'ffmpeg1/libavcodec/textdec.c')
| -rw-r--r-- | ffmpeg1/libavcodec/textdec.c | 188 |
1 files changed, 0 insertions, 188 deletions
diff --git a/ffmpeg1/libavcodec/textdec.c b/ffmpeg1/libavcodec/textdec.c deleted file mode 100644 index f3e6117..0000000 --- a/ffmpeg1/libavcodec/textdec.c +++ /dev/null @@ -1,188 +0,0 @@ -/* - * Copyright (c) 2012 Clément Bœsch - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * Raw subtitles decoder - */ - -#include "avcodec.h" -#include "ass.h" -#include "libavutil/bprint.h" -#include "libavutil/opt.h" - -typedef struct { - AVClass *class; - const char *linebreaks; - int keep_ass_markup; -} TextContext; - -#define OFFSET(x) offsetof(TextContext, x) -#define SD AV_OPT_FLAG_SUBTITLE_PARAM | AV_OPT_FLAG_DECODING_PARAM -static const AVOption options[] = { - { "keep_ass_markup", "Set if ASS tags must be escaped", OFFSET(keep_ass_markup), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, .flags=SD }, - { NULL } -}; - -static int text_event_to_ass(const AVCodecContext *avctx, AVBPrint *buf, - const char *p, const char *p_end) -{ - const TextContext *text = avctx->priv_data; - - for (; p < p_end && *p; p++) { - - /* forced custom line breaks, not accounted as "normal" EOL */ - if (text->linebreaks && strchr(text->linebreaks, *p)) { - av_bprintf(buf, "\\N"); - - /* standard ASS escaping so random characters don't get mis-interpreted - * as ASS */ - } else if (!text->keep_ass_markup && strchr("{}\\", *p)) { - av_bprintf(buf, "\\%c", *p); - - /* some packets might end abruptly (no \0 at the end, like for example - * in some cases of demuxing from a classic video container), some - * might be terminated with \n or \r\n which we have to remove (for - * consistency with those who haven't), and we also have to deal with - * evil cases such as \r at the end of the buffer (and no \0 terminated - * character) */ - } else if (p[0] == '\n') { - /* some stuff left so we can insert a line break */ - if (p < p_end - 1) - av_bprintf(buf, "\\N"); - } else if (p[0] == '\r' && p < p_end - 1 && p[1] == '\n') { - /* \r followed by a \n, we can skip it. We don't insert the \N yet - * because we don't know if it is followed by more text */ - continue; - - /* finally, a sane character */ - } else { - av_bprint_chars(buf, *p, 1); - } - } - av_bprintf(buf, "\r\n"); - return 0; -} - -static int text_decode_frame(AVCodecContext *avctx, void *data, - int *got_sub_ptr, AVPacket *avpkt) -{ - AVBPrint buf; - AVSubtitle *sub = data; - const char *ptr = avpkt->data; - const int ts_start = av_rescale_q(avpkt->pts, avctx->time_base, (AVRational){1,100}); - const int ts_duration = avpkt->duration != -1 ? - av_rescale_q(avpkt->duration, avctx->time_base, (AVRational){1,100}) : -1; - - av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); - if (ptr && avpkt->size > 0 && *ptr && - !text_event_to_ass(avctx, &buf, ptr, ptr + avpkt->size)) { - if (!av_bprint_is_complete(&buf)) { - av_bprint_finalize(&buf, NULL); - return AVERROR(ENOMEM); - } - ff_ass_add_rect(sub, buf.str, ts_start, ts_duration, 0); - } - *got_sub_ptr = sub->num_rects > 0; - av_bprint_finalize(&buf, NULL); - return avpkt->size; -} - -#define DECLARE_CLASS(decname) static const AVClass decname ## _decoder_class = { \ - .class_name = #decname " decoder", \ - .item_name = av_default_item_name, \ - .option = decname ## _options, \ - .version = LIBAVUTIL_VERSION_INT, \ -} - -#if CONFIG_TEXT_DECODER -#define text_options options -DECLARE_CLASS(text); - -AVCodec ff_text_decoder = { - .name = "text", - .priv_data_size = sizeof(TextContext), - .long_name = NULL_IF_CONFIG_SMALL("Raw text subtitle"), - .type = AVMEDIA_TYPE_SUBTITLE, - .id = AV_CODEC_ID_TEXT, - .decode = text_decode_frame, - .init = ff_ass_subtitle_header_default, - .priv_class = &text_decoder_class, -}; -#endif - -#if CONFIG_VPLAYER_DECODER || CONFIG_PJS_DECODER || CONFIG_SUBVIEWER1_DECODER - -static int linebreak_init(AVCodecContext *avctx) -{ - TextContext *text = avctx->priv_data; - text->linebreaks = "|"; - return ff_ass_subtitle_header_default(avctx); -} - -#if CONFIG_VPLAYER_DECODER -#define vplayer_options options -DECLARE_CLASS(vplayer); - -AVCodec ff_vplayer_decoder = { - .name = "vplayer", - .priv_data_size = sizeof(TextContext), - .long_name = NULL_IF_CONFIG_SMALL("VPlayer subtitle"), - .type = AVMEDIA_TYPE_SUBTITLE, - .id = AV_CODEC_ID_VPLAYER, - .decode = text_decode_frame, - .init = linebreak_init, - .priv_class = &vplayer_decoder_class, -}; -#endif - -#if CONFIG_PJS_DECODER -#define pjs_options options -DECLARE_CLASS(pjs); - -AVCodec ff_pjs_decoder = { - .name = "pjs", - .priv_data_size = sizeof(TextContext), - .long_name = NULL_IF_CONFIG_SMALL("PJS subtitle"), - .type = AVMEDIA_TYPE_SUBTITLE, - .id = AV_CODEC_ID_PJS, - .decode = text_decode_frame, - .init = linebreak_init, - .priv_class = &pjs_decoder_class, -}; -#endif - -#if CONFIG_SUBVIEWER1_DECODER -#define subviewer1_options options -DECLARE_CLASS(subviewer1); - -AVCodec ff_subviewer1_decoder = { - .name = "subviewer1", - .priv_data_size = sizeof(TextContext), - .long_name = NULL_IF_CONFIG_SMALL("SubViewer1 subtitle"), - .type = AVMEDIA_TYPE_SUBTITLE, - .id = AV_CODEC_ID_SUBVIEWER1, - .decode = text_decode_frame, - .init = linebreak_init, - .priv_class = &subviewer1_decoder_class, -}; -#endif - -#endif /* text subtitles with '|' line break */ |