1 /*
2 * Copyright (c) 2011 Justin Ruggles
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg 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.
10 *
11 * FFmpeg 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.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /**
22 * @file
23 * ADX audio parser
24 *
25 * Splits packets into individual blocks.
26 */
27
31
38
41 const uint8_t **poutbuf,
int *poutbuf_size,
43 {
47 int i;
49
51 for (i = 0; i < buf_size; i++) {
52 state = (state << 8) | buf[i];
53 /* check for fixed fields in ADX header for possible match */
54 if ((state & 0xFFFF0000FFFFFF00) == 0x8000000003120400ULL) {
55 int channels = state & 0xFF;
56 int header_size = ((state >> 32) & 0xFFFF) + 4;
57 if (channels > 0 && header_size >= 8) {
61 break;
62 }
63 }
64 }
66 }
67
74 } else
76 }
77
80 *poutbuf_size = 0;
81 return buf_size;
82 }
83
85
87 *poutbuf_size = buf_size;
88 return next;
89 }
90
96 };
AVCodecParser ff_adx_parser
int duration
Duration of the current frame.
int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size)
Combine the (truncated) bitstream to a complete frame.
void ff_parse_close(AVCodecParserContext *s)
static int adx_parse(AVCodecParserContext *s1, AVCodecContext *avctx, const uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size)
main external API structure.
uint64_t state64
contains the last 8 bytes in MSB order