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988f585fcb
* qatar/master: (44 commits) replacement Indeo 3 decoder gsm demuxer: do not allocate packet twice. flvenc: use first packet delay as global delay. ac3enc: doxygen update. imc: return error codes instead of 0 for error conditions. imc: return meaningful error codes instead of -1 imc: do not set channel layout for stereo imc: validate channel count imc: check for ff_fft_init() failure imc: check output buffer size before decoding imc: use DSPContext.bswap16_buf() to byte-swap packet data rtsp: add allowed_media_types option libgsm: add flush function to reset the decoder state when seeking libgsm: simplify decoding by using a loop gsm: log error message when packet is too small libgsmdec: do not needlessly set *data_size to 0 gsmdec: do not needlessly set *data_size to 0 gsmdec: add flush function to reset the decoder state when seeking libgsmdec: check output buffer size before decoding gsmdec: log error message when output buffer is too small. ... Conflicts: Changelog ffplay.c libavcodec/indeo3.c libavcodec/mjpeg_parser.c libavcodec/vp3.c libavformat/cutils.c libavformat/id3v2.c libavutil/parseutils.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
85 lines
2.6 KiB
C
85 lines
2.6 KiB
C
/*
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* DVD subtitle decoding
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* Copyright (c) 2005 Fabrice Bellard
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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 "libavutil/intreadwrite.h"
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#include "avcodec.h"
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/* parser definition */
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typedef struct DVDSubParseContext {
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uint8_t *packet;
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int packet_len;
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int packet_index;
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} DVDSubParseContext;
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static av_cold int dvdsub_parse_init(AVCodecParserContext *s)
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{
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return 0;
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}
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static int dvdsub_parse(AVCodecParserContext *s,
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AVCodecContext *avctx,
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const uint8_t **poutbuf, int *poutbuf_size,
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const uint8_t *buf, int buf_size)
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{
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DVDSubParseContext *pc = s->priv_data;
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if (pc->packet_index == 0) {
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if (buf_size < 2)
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return 0;
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pc->packet_len = AV_RB16(buf);
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if (pc->packet_len == 0) /* HD-DVD subpicture packet */
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pc->packet_len = AV_RB32(buf+2);
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av_freep(&pc->packet);
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pc->packet = av_malloc(pc->packet_len);
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}
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if (pc->packet) {
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if (pc->packet_index + buf_size <= pc->packet_len) {
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memcpy(pc->packet + pc->packet_index, buf, buf_size);
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pc->packet_index += buf_size;
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if (pc->packet_index >= pc->packet_len) {
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*poutbuf = pc->packet;
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*poutbuf_size = pc->packet_len;
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pc->packet_index = 0;
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return buf_size;
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}
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} else {
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/* erroneous size */
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pc->packet_index = 0;
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}
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}
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*poutbuf = NULL;
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*poutbuf_size = 0;
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return buf_size;
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}
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static av_cold void dvdsub_parse_close(AVCodecParserContext *s)
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{
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DVDSubParseContext *pc = s->priv_data;
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av_freep(&pc->packet);
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}
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AVCodecParser ff_dvdsub_parser = {
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.codec_ids = { CODEC_ID_DVD_SUBTITLE },
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.priv_data_size = sizeof(DVDSubParseContext),
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.parser_init = dvdsub_parse_init,
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.parser_parse = dvdsub_parse,
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.parser_close = dvdsub_parse_close,
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};
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