mirror of https://git.ffmpeg.org/ffmpeg.git
WebVTT demuxer and decoder.
This commit is contained in:
parent
697ea4fccf
commit
2599541b3d
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@ -63,6 +63,7 @@ version next:
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- Smooth Streaming live segmenter muxer
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- Smooth Streaming live segmenter muxer
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- F4V muxer
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- F4V muxer
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- sendcmd and asendcmd filters
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- sendcmd and asendcmd filters
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- WebVTT demuxer and decoder (simple tags supported)
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version 0.11:
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version 0.11:
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@ -898,6 +898,7 @@ performance on systems without hardware floating point support).
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@item SubRip (SRT) @tab X @tab X @tab X @tab X
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@item SubRip (SRT) @tab X @tab X @tab X @tab X
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@item SubViewer @tab @tab X @tab @tab X
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@item SubViewer @tab @tab X @tab @tab X
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@item 3GPP Timed Text @tab @tab @tab X @tab X
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@item 3GPP Timed Text @tab @tab @tab X @tab X
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@item WebVTT @tab @tab X @tab @tab X
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@item XSUB @tab @tab @tab X @tab X
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@item XSUB @tab @tab @tab X @tab X
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@end multitable
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@end multitable
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@ -463,6 +463,7 @@ OBJS-$(CONFIG_VP6_DECODER) += vp6.o vp56.o vp56data.o vp56dsp.o \
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OBJS-$(CONFIG_VP8_DECODER) += vp8.o vp8dsp.o vp56rac.o
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OBJS-$(CONFIG_VP8_DECODER) += vp8.o vp8dsp.o vp56rac.o
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OBJS-$(CONFIG_VQA_DECODER) += vqavideo.o
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OBJS-$(CONFIG_VQA_DECODER) += vqavideo.o
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OBJS-$(CONFIG_WAVPACK_DECODER) += wavpack.o
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OBJS-$(CONFIG_WAVPACK_DECODER) += wavpack.o
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OBJS-$(CONFIG_WEBVTT_DECODER) += webvttdec.o
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OBJS-$(CONFIG_WMALOSSLESS_DECODER) += wmalosslessdec.o wma_common.o
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OBJS-$(CONFIG_WMALOSSLESS_DECODER) += wmalosslessdec.o wma_common.o
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OBJS-$(CONFIG_WMAPRO_DECODER) += wmaprodec.o wma.o wma_common.o
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OBJS-$(CONFIG_WMAPRO_DECODER) += wmaprodec.o wma.o wma_common.o
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OBJS-$(CONFIG_WMAV1_DECODER) += wmadec.o wma.o wma_common.o aactab.o
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OBJS-$(CONFIG_WMAV1_DECODER) += wmadec.o wma.o wma_common.o aactab.o
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@ -422,6 +422,7 @@ void avcodec_register_all(void)
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REGISTER_ENCDEC (SRT, srt);
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REGISTER_ENCDEC (SRT, srt);
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REGISTER_ENCDEC (SUBRIP, subrip);
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REGISTER_ENCDEC (SUBRIP, subrip);
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REGISTER_DECODER (SUBVIEWER, subviewer);
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REGISTER_DECODER (SUBVIEWER, subviewer);
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REGISTER_DECODER (WEBVTT, webvtt);
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REGISTER_ENCDEC (XSUB, xsub);
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REGISTER_ENCDEC (XSUB, xsub);
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/* external libraries */
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/* external libraries */
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@ -448,6 +448,7 @@ enum AVCodecID {
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AV_CODEC_ID_REALTEXT = MKBETAG('R','T','X','T'),
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AV_CODEC_ID_REALTEXT = MKBETAG('R','T','X','T'),
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AV_CODEC_ID_SUBVIEWER = MKBETAG('S','u','b','V'),
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AV_CODEC_ID_SUBVIEWER = MKBETAG('S','u','b','V'),
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AV_CODEC_ID_SUBRIP = MKBETAG('S','R','i','p'),
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AV_CODEC_ID_SUBRIP = MKBETAG('S','R','i','p'),
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AV_CODEC_ID_WEBVTT = MKBETAG('W','V','T','T'),
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/* other specific kind of codecs (generally used for attachments) */
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/* other specific kind of codecs (generally used for attachments) */
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AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
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AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
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@ -2342,6 +2342,12 @@ static const AVCodecDescriptor codec_descriptors[] = {
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.name = "subviewer",
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.name = "subviewer",
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.long_name = NULL_IF_CONFIG_SMALL("SubViewer subtitle"),
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.long_name = NULL_IF_CONFIG_SMALL("SubViewer subtitle"),
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},
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},
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{
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.id = AV_CODEC_ID_WEBVTT,
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.type = AVMEDIA_TYPE_SUBTITLE,
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.name = "webvtt",
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.long_name = NULL_IF_CONFIG_SMALL("WebVTT subtitle"),
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},
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{
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{
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.id = AV_CODEC_ID_BINTEXT,
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.id = AV_CODEC_ID_BINTEXT,
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.type = AVMEDIA_TYPE_VIDEO,
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.type = AVMEDIA_TYPE_VIDEO,
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@ -27,7 +27,7 @@
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*/
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*/
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#define LIBAVCODEC_VERSION_MAJOR 54
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#define LIBAVCODEC_VERSION_MAJOR 54
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#define LIBAVCODEC_VERSION_MINOR 57
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#define LIBAVCODEC_VERSION_MINOR 58
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#define LIBAVCODEC_VERSION_MICRO 100
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#define LIBAVCODEC_VERSION_MICRO 100
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#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
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@ -0,0 +1,100 @@
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/*
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* Copyright (c) 2012 Clément Bœsch
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* WebVTT subtitle decoder
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* @see http://dev.w3.org/html5/webvtt/
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* @todo need to support extended markups and cue settings
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*/
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#include "avcodec.h"
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#include "ass.h"
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#include "libavutil/bprint.h"
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static const struct {
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const char *from;
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const char *to;
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} webvtt_tag_replace[] = {
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{"<i>", "{\\i1}"}, {"</i>", "{\\i0}"},
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{"<b>", "{\\b1}"}, {"</b>", "{\\b0}"},
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{"<u>", "{\\u1}"}, {"</u>", "{\\u0}"},
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{"{", "\\{"}, {"}", "\\}"}, // escape to avoid ASS markup conflicts
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};
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static int webvtt_event_to_ass(AVBPrint *buf, const char *p)
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{
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int i, skip = 0;
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while (*p) {
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for (i = 0; i < FF_ARRAY_ELEMS(webvtt_tag_replace); i++) {
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const char *from = webvtt_tag_replace[i].from;
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const size_t len = strlen(from);
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if (!strncmp(p, from, len)) {
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av_bprintf(buf, "%s", webvtt_tag_replace[i].to);
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p += len;
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break;
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}
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}
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if (!*p)
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break;
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if (*p == '<')
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skip = 1;
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else if (*p == '>')
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skip = 0;
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else if (p[0] == '\n' && p[1])
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av_bprintf(buf, "\\N");
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else if (!skip && *p != '\r')
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av_bprint_chars(buf, *p, 1);
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p++;
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}
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av_bprintf(buf, "\r\n");
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return 0;
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}
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static int webvtt_decode_frame(AVCodecContext *avctx,
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void *data, int *got_sub_ptr, AVPacket *avpkt)
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{
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AVSubtitle *sub = data;
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const char *ptr = avpkt->data;
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AVBPrint buf;
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av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
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if (ptr && avpkt->size > 0 && !webvtt_event_to_ass(&buf, ptr)) {
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int ts_start = av_rescale_q(avpkt->pts, avctx->time_base, (AVRational){1,100});
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int ts_duration = avpkt->duration != -1 ?
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av_rescale_q(avpkt->duration, avctx->time_base, (AVRational){1,100}) : -1;
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ff_ass_add_rect(sub, buf.str, ts_start, ts_duration, 0);
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}
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*got_sub_ptr = sub->num_rects > 0;
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av_bprint_finalize(&buf, NULL);
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return avpkt->size;
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}
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AVCodec ff_webvtt_decoder = {
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.name = "webvtt",
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.long_name = NULL_IF_CONFIG_SMALL("WebVTT subtitle"),
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.type = AVMEDIA_TYPE_SUBTITLE,
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.id = AV_CODEC_ID_WEBVTT,
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.decode = webvtt_decode_frame,
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.init = ff_ass_subtitle_header_default,
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};
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@ -355,6 +355,7 @@ OBJS-$(CONFIG_WC3_DEMUXER) += wc3movie.o
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OBJS-$(CONFIG_WEBM_MUXER) += matroskaenc.o matroska.o \
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OBJS-$(CONFIG_WEBM_MUXER) += matroskaenc.o matroska.o \
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isom.o avc.o \
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isom.o avc.o \
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flacenc_header.o avlanguage.o
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flacenc_header.o avlanguage.o
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OBJS-$(CONFIG_WEBVTT_DEMUXER) += webvttdec.o
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OBJS-$(CONFIG_WSAUD_DEMUXER) += westwood_aud.o
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OBJS-$(CONFIG_WSAUD_DEMUXER) += westwood_aud.o
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OBJS-$(CONFIG_WSVQA_DEMUXER) += westwood_vqa.o
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OBJS-$(CONFIG_WSVQA_DEMUXER) += westwood_vqa.o
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OBJS-$(CONFIG_WTV_DEMUXER) += wtvdec.o wtv.o asfdec.o asf.o asfcrypt.o \
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OBJS-$(CONFIG_WTV_DEMUXER) += wtvdec.o wtv.o asfdec.o asf.o asfcrypt.o \
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@ -252,6 +252,7 @@ void av_register_all(void)
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REGISTER_MUXDEMUX (WAV, wav);
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REGISTER_MUXDEMUX (WAV, wav);
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REGISTER_DEMUXER (WC3, wc3);
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REGISTER_DEMUXER (WC3, wc3);
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REGISTER_MUXER (WEBM, webm);
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REGISTER_MUXER (WEBM, webm);
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REGISTER_DEMUXER (WEBVTT, webvtt);
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REGISTER_DEMUXER (WSAUD, wsaud);
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REGISTER_DEMUXER (WSAUD, wsaud);
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REGISTER_DEMUXER (WSVQA, wsvqa);
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REGISTER_DEMUXER (WSVQA, wsvqa);
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REGISTER_MUXDEMUX (WTV, wtv);
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REGISTER_MUXDEMUX (WTV, wtv);
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@ -30,8 +30,8 @@
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#include "libavutil/avutil.h"
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#include "libavutil/avutil.h"
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#define LIBAVFORMAT_VERSION_MAJOR 54
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#define LIBAVFORMAT_VERSION_MAJOR 54
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#define LIBAVFORMAT_VERSION_MINOR 27
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#define LIBAVFORMAT_VERSION_MINOR 28
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#define LIBAVFORMAT_VERSION_MICRO 101
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#define LIBAVFORMAT_VERSION_MICRO 100
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#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
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#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
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LIBAVFORMAT_VERSION_MINOR, \
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LIBAVFORMAT_VERSION_MINOR, \
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@ -0,0 +1,188 @@
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/*
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* Copyright (c) 2012 Clément Bœsch
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* WebVTT subtitle demuxer
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* @see http://dev.w3.org/html5/webvtt/
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*/
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#include "avformat.h"
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#include "internal.h"
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#include "subtitles.h"
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#include "libavutil/bprint.h"
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#include "libavutil/intreadwrite.h"
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typedef struct {
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FFDemuxSubtitlesQueue q;
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} WebVTTContext;
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static int webvtt_probe(AVProbeData *p)
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{
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const uint8_t *ptr = p->buf;
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if (AV_RB24(ptr) == 0xEFBBBF)
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ptr += 3; /* skip UTF-8 BOM */
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if (!strncmp(ptr, "WEBVTT", 6) &&
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(!ptr[6] || strchr("\n\r\t ", ptr[6])))
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return AVPROBE_SCORE_MAX;
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return 0;
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}
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static int64_t read_ts(const char *s)
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{
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int hh, mm, ss, ms;
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if (sscanf(s, "%u:%u:%u.%u", &hh, &mm, &ss, &ms) == 4) return (hh*3600 + mm*60 + ss) * 1000 + ms;
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if (sscanf(s, "%u:%u.%u", &mm, &ss, &ms) == 3) return ( mm*60 + ss) * 1000 + ms;
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return AV_NOPTS_VALUE;
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}
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static int64_t extract_cue(AVBPrint *buf, AVIOContext *pb)
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{
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int prev_chr_is_eol = 0;
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int64_t pos = avio_tell(pb);
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av_bprint_clear(buf);
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for (;;) {
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char c = avio_r8(pb);
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if (!c)
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break;
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if (c == '\r' || c == '\n') {
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if (prev_chr_is_eol)
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break;
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prev_chr_is_eol = (c == '\n');
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} else
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prev_chr_is_eol = 0;
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if (c != '\r')
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av_bprint_chars(buf, c, 1);
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}
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av_bprint_chars(buf, '\0', 1);
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return pos;
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}
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static int webvtt_read_header(AVFormatContext *s)
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{
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WebVTTContext *webvtt = s->priv_data;
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AVBPrint header, cue;
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int res = 0;
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AVStream *st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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avpriv_set_pts_info(st, 64, 1, 1000);
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st->codec->codec_type = AVMEDIA_TYPE_SUBTITLE;
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st->codec->codec_id = AV_CODEC_ID_WEBVTT;
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av_bprint_init(&header, 0, AV_BPRINT_SIZE_UNLIMITED);
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av_bprint_init(&cue, 0, AV_BPRINT_SIZE_UNLIMITED);
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for (;;) {
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int i, len;
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int64_t pos = extract_cue(&cue, s->pb);
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AVPacket *sub;
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const char *p = cue.str;
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const char *identifier = p;
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//const char *settings = NULL;
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int64_t ts_start, ts_end;
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if (!*p) // EOF
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break;
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/* ignore header chunk */
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if (!strncmp(p, "\xEF\xBB\xBFWEBVTT", 9) ||
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!strncmp(p, "WEBVTT", 6))
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continue;
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/* optional cue identifier (can be a number like in SRT or some kind of
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* chaptering id), silently skip it */
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||||||
|
for (i = 0; p[i] && p[i] != '\n'; i++) {
|
||||||
|
if (!strncmp(p + i, "-->", 3)) {
|
||||||
|
identifier = NULL;
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (identifier)
|
||||||
|
p += strcspn(p, "\n");
|
||||||
|
|
||||||
|
/* cue timestamps */
|
||||||
|
if ((ts_start = read_ts(p)) == AV_NOPTS_VALUE)
|
||||||
|
break;
|
||||||
|
if (!(p = strstr(p, "-->")))
|
||||||
|
break;
|
||||||
|
p += 3;
|
||||||
|
do p++; while (*p == ' ' || *p == '\t');
|
||||||
|
if ((ts_end = read_ts(p)) == AV_NOPTS_VALUE)
|
||||||
|
break;
|
||||||
|
|
||||||
|
/* optional cue settings, TODO: store in side_data */
|
||||||
|
p += strcspn(p, "\n\t ");
|
||||||
|
while (*p == '\t' || *p == ' ')
|
||||||
|
p++;
|
||||||
|
if (*p != '\n') {
|
||||||
|
//settings = p;
|
||||||
|
p += strcspn(p, "\n");
|
||||||
|
}
|
||||||
|
if (*p == '\n')
|
||||||
|
p++;
|
||||||
|
|
||||||
|
/* create packet */
|
||||||
|
len = cue.str + cue.len - p - 1;
|
||||||
|
sub = ff_subtitles_queue_insert(&webvtt->q, p, len, 0);
|
||||||
|
if (!sub) {
|
||||||
|
res = AVERROR(ENOMEM);
|
||||||
|
goto end;
|
||||||
|
}
|
||||||
|
sub->pos = pos;
|
||||||
|
sub->pts = ts_start;
|
||||||
|
sub->duration = ts_end - ts_start;
|
||||||
|
}
|
||||||
|
|
||||||
|
ff_subtitles_queue_finalize(&webvtt->q);
|
||||||
|
|
||||||
|
end:
|
||||||
|
av_bprint_finalize(&cue, NULL);
|
||||||
|
av_bprint_finalize(&header, NULL);
|
||||||
|
return res;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int webvtt_read_packet(AVFormatContext *s, AVPacket *pkt)
|
||||||
|
{
|
||||||
|
WebVTTContext *webvtt = s->priv_data;
|
||||||
|
return ff_subtitles_queue_read_packet(&webvtt->q, pkt);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int webvtt_read_close(AVFormatContext *s)
|
||||||
|
{
|
||||||
|
WebVTTContext *webvtt = s->priv_data;
|
||||||
|
ff_subtitles_queue_clean(&webvtt->q);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
AVInputFormat ff_webvtt_demuxer = {
|
||||||
|
.name = "webvtt",
|
||||||
|
.long_name = NULL_IF_CONFIG_SMALL("WebVTT subtitle"),
|
||||||
|
.priv_data_size = sizeof(WebVTTContext),
|
||||||
|
.read_probe = webvtt_probe,
|
||||||
|
.read_header = webvtt_read_header,
|
||||||
|
.read_packet = webvtt_read_packet,
|
||||||
|
.read_close = webvtt_read_close,
|
||||||
|
.flags = AVFMT_GENERIC_INDEX,
|
||||||
|
.extensions = "vtt",
|
||||||
|
};
|
|
@ -25,5 +25,8 @@ fate-sub-subripenc: CMD = md5 -i $(SAMPLES)/sub/MovText_capability_tester.mp4 -s
|
||||||
FATE_SUBTITLES += fate-sub-subviewer
|
FATE_SUBTITLES += fate-sub-subviewer
|
||||||
fate-sub-subviewer: CMD = md5 -i $(SAMPLES)/sub/SubViewer_capability_tester.sub -f ass
|
fate-sub-subviewer: CMD = md5 -i $(SAMPLES)/sub/SubViewer_capability_tester.sub -f ass
|
||||||
|
|
||||||
|
FATE_SUBTITLES += fate-sub-webvtt
|
||||||
|
fate-sub-webvtt: CMD = md5 -i $(SAMPLES)/sub/WebVTT_capability_tester.vtt -f ass
|
||||||
|
|
||||||
FATE_SAMPLES_FFMPEG += $(FATE_SUBTITLES)
|
FATE_SAMPLES_FFMPEG += $(FATE_SUBTITLES)
|
||||||
fate-subtitles: $(FATE_SUBTITLES)
|
fate-subtitles: $(FATE_SUBTITLES)
|
||||||
|
|
|
@ -0,0 +1 @@
|
||||||
|
5384a70c89ddca4b007fb7ffba95cffb
|
Loading…
Reference in New Issue