diff options
Diffstat (limited to 'ffmpeg/libavcodec/movtextdec.c')
| -rw-r--r-- | ffmpeg/libavcodec/movtextdec.c | 116 |
1 files changed, 0 insertions, 116 deletions
diff --git a/ffmpeg/libavcodec/movtextdec.c b/ffmpeg/libavcodec/movtextdec.c deleted file mode 100644 index 05ff53a..0000000 --- a/ffmpeg/libavcodec/movtextdec.c +++ /dev/null @@ -1,116 +0,0 @@ -/* - * 3GPP TS 26.245 Timed Text decoder - * Copyright (c) 2012 Philip Langdale <philipl@overt.org> - * - * 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 - */ - -#include "avcodec.h" -#include "ass.h" -#include "libavutil/avstring.h" -#include "libavutil/common.h" -#include "libavutil/bprint.h" -#include "libavutil/intreadwrite.h" - -static int text_to_ass(AVBPrint *buf, const char *text, const char *text_end) -{ - while (text < text_end) { - switch (*text) { - case '\r': - break; - case '\n': - av_bprintf(buf, "\\N"); - break; - default: - av_bprint_chars(buf, *text, 1); - break; - } - text++; - } - - av_bprintf(buf, "\r\n"); - return 0; -} - -static int mov_text_init(AVCodecContext *avctx) { - /* - * TODO: Handle the default text style. - * NB: Most players ignore styles completely, with the result that - * it's very common to find files where the default style is broken - * and respecting it results in a worse experience than ignoring it. - */ - return ff_ass_subtitle_header_default(avctx); -} - -static int mov_text_decode_frame(AVCodecContext *avctx, - void *data, int *got_sub_ptr, AVPacket *avpkt) -{ - AVSubtitle *sub = data; - int ts_start, ts_end; - AVBPrint buf; - const char *ptr = avpkt->data; - const char *end; - - if (!ptr || avpkt->size < 2) - return AVERROR_INVALIDDATA; - - /* - * A packet of size two with value zero is an empty subtitle - * used to mark the end of the previous non-empty subtitle. - * We can just drop them here as we have duration information - * already. If the value is non-zero, then it's technically a - * bad packet. - */ - if (avpkt->size == 2) - return AV_RB16(ptr) == 0 ? 0 : AVERROR_INVALIDDATA; - - /* - * The first two bytes of the packet are the length of the text string - * In complex cases, there are style descriptors appended to the string - * so we can't just assume the packet size is the string size. - */ - end = ptr + FFMIN(2 + AV_RB16(ptr), avpkt->size); - ptr += 2; - - ts_start = av_rescale_q(avpkt->pts, - avctx->time_base, - (AVRational){1,100}); - ts_end = av_rescale_q(avpkt->pts + avpkt->duration, - avctx->time_base, - (AVRational){1,100}); - - // Note that the spec recommends lines be no longer than 2048 characters. - av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED); - text_to_ass(&buf, ptr, end); - - if (!av_bprint_is_complete(&buf)) - return AVERROR(ENOMEM); - - ff_ass_add_rect(sub, buf.str, ts_start, ts_end-ts_start, 0); - *got_sub_ptr = sub->num_rects > 0; - av_bprint_finalize(&buf, NULL); - return avpkt->size; -} - -AVCodec ff_movtext_decoder = { - .name = "mov_text", - .long_name = NULL_IF_CONFIG_SMALL("3GPP Timed Text subtitle"), - .type = AVMEDIA_TYPE_SUBTITLE, - .id = AV_CODEC_ID_MOV_TEXT, - .init = mov_text_init, - .decode = mov_text_decode_frame, -}; |