| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Audio and Video frame extraction | ||
| 3 | * Copyright (c) 2003 Fabrice Bellard | ||
| 4 | * Copyright (c) 2003 Michael Niedermayer | ||
| 5 | * | ||
| 6 | * This file is part of FFmpeg. | ||
| 7 | * | ||
| 8 | * FFmpeg is free software; you can redistribute it and/or | ||
| 9 | * modify it under the terms of the GNU Lesser General Public | ||
| 10 | * License as published by the Free Software Foundation; either | ||
| 11 | * version 2.1 of the License, or (at your option) any later version. | ||
| 12 | * | ||
| 13 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 16 | * Lesser General Public License for more details. | ||
| 17 | * | ||
| 18 | * You should have received a copy of the GNU Lesser General Public | ||
| 19 | * License along with FFmpeg; if not, write to the Free Software | ||
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 21 | */ | ||
| 22 | |||
| 23 | #include "parser.h" | ||
| 24 | #include "aac_ac3_parser.h" | ||
| 25 | #include "adts_header.h" | ||
| 26 | #include "adts_parser.h" | ||
| 27 | #include "get_bits.h" | ||
| 28 | #include "mpeg4audio.h" | ||
| 29 | |||
| 30 | 40999 | static int aac_sync(uint64_t state, int *need_next_header, int *new_frame_start) | |
| 31 | { | ||
| 32 | GetBitContext bits; | ||
| 33 | AACADTSHeaderInfo hdr; | ||
| 34 | int size; | ||
| 35 | union { | ||
| 36 | uint64_t u64; | ||
| 37 | uint8_t u8[8 + AV_INPUT_BUFFER_PADDING_SIZE]; | ||
| 38 | } tmp; | ||
| 39 | |||
| 40 | 40999 | tmp.u64 = av_be2ne64(state); | |
| 41 | 40999 | init_get_bits(&bits, tmp.u8 + 8 - AV_AAC_ADTS_HEADER_SIZE, | |
| 42 | AV_AAC_ADTS_HEADER_SIZE * 8); | ||
| 43 | |||
| 44 |
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40999 | if ((size = ff_adts_header_parse(&bits, &hdr)) < 0) |
| 45 | 35142 | return 0; | |
| 46 | 5857 | *need_next_header = 0; | |
| 47 | 5857 | *new_frame_start = 1; | |
| 48 | 5857 | return size; | |
| 49 | } | ||
| 50 | |||
| 51 | 157 | static av_cold int aac_parse_init(AVCodecParserContext *s1) | |
| 52 | { | ||
| 53 | 157 | AACAC3ParseContext *s = s1->priv_data; | |
| 54 | 157 | s->header_size = AV_AAC_ADTS_HEADER_SIZE; | |
| 55 | 157 | s->sync = aac_sync; | |
| 56 | 157 | return 0; | |
| 57 | } | ||
| 58 | |||
| 59 | |||
| 60 | const AVCodecParser ff_aac_parser = { | ||
| 61 | .codec_ids = { AV_CODEC_ID_AAC }, | ||
| 62 | .priv_data_size = sizeof(AACAC3ParseContext), | ||
| 63 | .parser_init = aac_parse_init, | ||
| 64 | .parser_parse = ff_aac_ac3_parse, | ||
| 65 | .parser_close = ff_parse_close, | ||
| 66 | }; | ||
| 67 |