3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 * Copyright (c) 2003 Alex Beregszaszi
5 * Copyright (c) 2003-2004 Michael Niedermayer
7 * This file is part of Libav.
9 * Libav is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
14 * Libav is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with Libav; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
33 * Find the end of the current frame in the bitstream.
34 * @return the position of the first byte of the next frame, or -1
36 static int find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size){
40 vop_found= pc->frame_start_found;
45 for(i=0; i<buf_size; i++){
46 state= (state<<8) | buf[i];
56 /* EOF considered as end of frame */
59 for(; i<buf_size; i++){
60 state= (state<<8) | buf[i];
62 pc->frame_start_found=0;
68 pc->frame_start_found= vop_found;
73 static int jpeg_parse(AVCodecParserContext *s,
74 AVCodecContext *avctx,
75 const uint8_t **poutbuf, int *poutbuf_size,
76 const uint8_t *buf, int buf_size)
78 ParseContext *pc = s->priv_data;
81 if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
84 next= find_frame_end(pc, buf, buf_size);
86 if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
94 *poutbuf_size = buf_size;
99 AVCodecParser ff_mjpeg_parser = {
100 .codec_ids = { CODEC_ID_MJPEG },
101 .priv_data_size = sizeof(ParseContext),
102 .parser_parse = jpeg_parse,
103 .parser_close = ff_parse_close,