2 * Copyright (c) 2011 Justin Ruggles
4 * This file is part of Libav.
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 * Splits packets into individual blocks.
28 #include "libavutil/intreadwrite.h"
32 typedef struct ADXParseContext {
39 static int adx_parse(AVCodecParserContext *s1,
40 AVCodecContext *avctx,
41 const uint8_t **poutbuf, int *poutbuf_size,
42 const uint8_t *buf, int buf_size)
44 ADXParseContext *s = s1->priv_data;
45 ParseContext *pc = &s->pc;
46 int next = END_NOT_FOUND;
48 uint64_t state= pc->state64;
51 for(i=0; i<buf_size; i++){
52 state= (state<<8) | buf[i];
53 if((state&0xFFFF0000FFFFFF00) == 0x8000000003120400ULL && (state&0xFF) && ((state>>32)&0xFFFF)>=4){
54 s->header_size= ((state>>32)&0xFFFF) + 4;
55 s->block_size = BLOCK_SIZE * (state&0xFF);
56 s->remaining = i - 7 + s->header_size + s->block_size;
65 s->remaining = s->block_size;
67 if (s->remaining<=buf_size) {
71 s->remaining -= buf_size;
74 if (ff_combine_frame(pc, next, &buf, &buf_size) < 0 || !buf_size) {
80 *poutbuf_size = buf_size;
84 AVCodecParser ff_adx_parser = {
85 .codec_ids = { CODEC_ID_ADPCM_ADX },
86 .priv_data_size = sizeof(ADXParseContext),
87 .parser_parse = adx_parse,
88 .parser_close = ff_parse_close,