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Add bitstream filter to convert between mov and plain text subtitles

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Originally committed as revision 11659 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Reimar Döffinger 2008-01-28 21:24:09 +00:00
parent e1cc833926
commit 234c6ed76d
3 changed files with 59 additions and 0 deletions
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2
libavcodec/Makefile
View File

@ -337,10 +337,12 @@ OBJS-$(CONFIG_DUMP_EXTRADATA_BSF) += dump_extradata_bsf.o
OBJS-$(CONFIG_H264_MP4TOANNEXB_BSF) += h264_mp4toannexb_bsf.o
OBJS-$(CONFIG_IMX_DUMP_HEADER_BSF) += imx_dump_header_bsf.o
OBJS-$(CONFIG_MJPEGA_DUMP_HEADER_BSF) += mjpega_dump_header_bsf.o
OBJS-$(CONFIG_MOV2TEXTSUB_BSF) += movsub_bsf.o
OBJS-$(CONFIG_MP3_HEADER_COMPRESS_BSF) += mp3_header_compress_bsf.o
OBJS-$(CONFIG_MP3_HEADER_DECOMPRESS_BSF) += mp3_header_decompress_bsf.o mpegaudiodata.o
OBJS-$(CONFIG_NOISE_BSF) += noise_bsf.o
OBJS-$(CONFIG_REMOVE_EXTRADATA_BSF) += remove_extradata_bsf.o
OBJS-$(CONFIG_TEXT2MOVSUB_BSF) += movsub_bsf.o
OBJS-$(HAVE_BEOSTHREADS) += beosthread.o
OBJS-$(HAVE_OS2THREADS) += os2thread.o

2
libavcodec/allcodecs.c
View File

@ -305,7 +305,9 @@ void avcodec_register_all(void)
REGISTER_BSF (MJPEGA_DUMP_HEADER, mjpega_dump_header);
REGISTER_BSF (MP3_HEADER_COMPRESS, mp3_header_compress);
REGISTER_BSF (MP3_HEADER_DECOMPRESS, mp3_header_decompress);
REGISTER_BSF (MOV2TEXTSUB, mov2textsub);
REGISTER_BSF (NOISE, noise);
REGISTER_BSF (REMOVE_EXTRADATA, remove_extradata);
REGISTER_BSF (TEXT2MOVSUB, text2movsub);
}

55
libavcodec/movsub_bsf.c Normal file
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@ -0,0 +1,55 @@
/*
* Copyright (c) 2008 Reimar Döffinger
*
* 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"
static int text2movsub(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size, int keyframe){
if (buf_size > 0xffff) return 0;
*poutbuf_size = buf_size + 2;
*poutbuf = av_malloc(*poutbuf_size + FF_INPUT_BUFFER_PADDING_SIZE);
AV_WB16(*poutbuf, buf_size);
memcpy(*poutbuf + 2, buf, buf_size);
return 1;
}
AVBitStreamFilter text2movsub_bsf={
"text2movsub",
0,
text2movsub,
};
static int mov2textsub(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size, int keyframe){
if (buf_size < 2) return 0;
*poutbuf_size = FFMIN(buf_size - 2, AV_RB16(buf));
*poutbuf = av_malloc(*poutbuf_size + FF_INPUT_BUFFER_PADDING_SIZE);
memcpy(*poutbuf, buf + 2, *poutbuf_size);
return 1;
}
AVBitStreamFilter mov2textsub_bsf={
"mov2textsub",
0,
mov2textsub,
};