mirror of https://git.ffmpeg.org/ffmpeg.git
add missing files in previous commit (ASS encoder and decoder)
Originally committed as revision 25747 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
parent
e9c098dbaa
commit
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/*
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* SSA/ASS common funtions
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* Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
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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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#include "avcodec.h"
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#include "ass.h"
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void ff_ass_init(AVSubtitle *sub)
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{
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memset(sub, 0, sizeof(*sub));
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}
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static int ts_to_string(char *str, int strlen, int ts)
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{
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int h, m, s;
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h = ts/360000; ts -= 360000*h;
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m = ts/ 6000; ts -= 6000*m;
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s = ts/ 100; ts -= 100*s;
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return snprintf(str, strlen, "%d:%02d:%02d.%02d", h, m, s, ts);
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}
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int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,
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int ts_start, int ts_end, int raw)
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{
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int len = 0, dlen, duration = ts_end - ts_start;
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char s_start[16], s_end[16], header[48] = {0};
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AVSubtitleRect **rects;
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if (!raw) {
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ts_to_string(s_start, sizeof(s_start), ts_start);
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ts_to_string(s_end, sizeof(s_end), ts_end );
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len = snprintf(header, sizeof(header), "Dialogue: 0,%s,%s,",
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s_start, s_end);
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}
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dlen = strcspn(dialog, "\n");
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dlen += dialog[dlen] == '\n';
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rects = av_realloc(sub->rects, (sub->num_rects+1) * sizeof(*sub->rects));
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if (!rects)
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return AVERROR(ENOMEM);
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sub->rects = rects;
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sub->end_display_time = FFMAX(sub->end_display_time, 10 * duration);
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rects[sub->num_rects] = av_mallocz(sizeof(*rects[0]));
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rects[sub->num_rects]->type = SUBTITLE_ASS;
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rects[sub->num_rects]->ass = av_malloc(len + dlen + 1);
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strcpy (rects[sub->num_rects]->ass , header);
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strncpy(rects[sub->num_rects]->ass + len, dialog, dlen);
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sub->num_rects++;
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return dlen;
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}
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/*
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* SSA/ASS common funtions
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* Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
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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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#ifndef AVCODEC_ASS_H
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#define AVCODEC_ASS_H
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#include "avcodec.h"
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/**
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* Initialize an AVSubtitle structure for use with ff_ass_add_rect().
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*
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* @param sub pointer to the AVSubtitle
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*/
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void ff_ass_init(AVSubtitle *sub);
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/**
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* Add an ASS dialog line to an AVSubtitle as a new AVSubtitleRect.
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*
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* @param sub pointer to the AVSubtitle
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* @param dialog ASS dialog to add to sub
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* @param ts_start start timestamp for this dialog (in 1/100 second unit)
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* @param ts_end end timestamp for this dialog (in 1/100 second unit)
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* @param raw when set to 1, it indicates that dialog contains a whole ASS
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* dialog line which should be copied as is.
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* when set to 0, it indicates that dialog contains only the Text
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* part of the ASS dialog line, the rest of the line
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* will be generated.
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* @return number of characters read from dialog. It can be less than the whole
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* length of dialog, if dialog contains several lines of text.
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* A negative value indicates an error.
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*/
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int ff_ass_add_rect(AVSubtitle *sub, const char *dialog,
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int ts_start, int ts_end, int raw);
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#endif /* AVCODEC_ASS_H */
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@ -0,0 +1,62 @@
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/*
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* SSA/ASS decoder
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* Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
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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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#include "avcodec.h"
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#include "ass.h"
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static av_cold int ass_decode_init(AVCodecContext *avctx)
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{
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avctx->subtitle_header = av_malloc(avctx->extradata_size);
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if (!avctx->extradata)
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return AVERROR(ENOMEM);
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memcpy(avctx->subtitle_header, avctx->extradata, avctx->extradata_size);
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avctx->subtitle_header_size = avctx->extradata_size;
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return 0;
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}
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static int ass_decode_frame(AVCodecContext *avctx, void *data, int *got_sub_ptr,
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AVPacket *avpkt)
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{
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const char *ptr = avpkt->data;
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int len, size = avpkt->size;
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ff_ass_init(data);
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while (size > 0) {
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len = ff_ass_add_rect(data, ptr, 0, 0/* FIXME: duration */, 1);
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if (len < 0)
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return len;
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ptr += len;
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size -= len;
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}
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*got_sub_ptr = avpkt->size > 0;
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return avpkt->size;
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}
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AVCodec ass_decoder = {
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.name = "ass",
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.long_name = NULL_IF_CONFIG_SMALL("Advanced SubStation Alpha subtitle"),
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.type = AVMEDIA_TYPE_SUBTITLE,
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.id = CODEC_ID_SSA,
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.init = ass_decode_init,
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.decode = ass_decode_frame,
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};
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@ -0,0 +1,67 @@
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/*
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* SSA/ASS encoder
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* Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
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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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#include "avcodec.h"
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#include "libavutil/avstring.h"
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static av_cold int ass_encode_init(AVCodecContext *avctx)
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{
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avctx->extradata = av_malloc(avctx->subtitle_header_size);
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if (!avctx->extradata)
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return AVERROR(ENOMEM);
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memcpy(avctx->extradata, avctx->subtitle_header, avctx->subtitle_header_size);
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avctx->extradata_size = avctx->subtitle_header_size;
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return 0;
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}
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static int ass_encode_frame(AVCodecContext *avctx,
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unsigned char *buf, int bufsize, void *data)
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{
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AVSubtitle *sub = data;
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int i, len, total_len = 0;
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for (i=0; i<sub->num_rects; i++) {
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if (sub->rects[i]->type != SUBTITLE_ASS) {
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av_log(avctx, AV_LOG_ERROR, "Only SUBTITLE_ASS type supported.\n");
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return -1;
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}
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len = av_strlcpy(buf+total_len, sub->rects[i]->ass, bufsize-total_len);
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if (len > bufsize-total_len-1) {
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av_log(avctx, AV_LOG_ERROR, "Buffer too small for ASS event.\n");
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return -1;
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}
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total_len += len;
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}
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return total_len;
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}
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AVCodec ass_encoder = {
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.name = "ass",
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.long_name = NULL_IF_CONFIG_SMALL("Advanced SubStation Alpha subtitle"),
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.type = AVMEDIA_TYPE_SUBTITLE,
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.id = CODEC_ID_SSA,
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.init = ass_encode_init,
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.encode = ass_encode_frame,
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};
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