3 * Copyright (c) 2008 Baptiste Coudurier <baptiste.coudurier@free.fr>
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
29 #define DNXHD_HEADER_PREFIX 0x0000028001
31 static int dnxhd_find_frame_end(ParseContext *pc,
32 const uint8_t *buf, int buf_size)
34 uint64_t state = pc->state64;
35 int pic_found = pc->frame_start_found;
39 for (i = 0; i < buf_size; i++) {
40 state = (state << 8) | buf[i];
41 if ((state & 0xffffffffffLL) == DNXHD_HEADER_PREFIX) {
50 if (!buf_size) /* EOF considered as end of frame */
52 for (; i < buf_size; i++) {
53 state = (state << 8) | buf[i];
54 if ((state & 0xffffffffffLL) == DNXHD_HEADER_PREFIX) {
55 pc->frame_start_found = 0;
61 pc->frame_start_found = pic_found;
66 static int dnxhd_parse(AVCodecParserContext *s,
67 AVCodecContext *avctx,
68 const uint8_t **poutbuf, int *poutbuf_size,
69 const uint8_t *buf, int buf_size)
71 ParseContext *pc = s->priv_data;
74 if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) {
77 next = dnxhd_find_frame_end(pc, buf, buf_size);
78 if (ff_combine_frame(pc, next, &buf, &buf_size) < 0) {
85 *poutbuf_size = buf_size;
89 AVCodecParser ff_dnxhd_parser = {
90 .codec_ids = { AV_CODEC_ID_DNXHD },
91 .priv_data_size = sizeof(ParseContext),
92 .parser_parse = dnxhd_parse,
93 .parser_close = ff_parse_close,