| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * FTR parser | ||
| 3 | * Copyright (c) 2022 Paul B Mahol | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg 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. | ||
| 11 | * | ||
| 12 | * FFmpeg 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. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | /** | ||
| 23 | * @file | ||
| 24 | * FTR parser | ||
| 25 | */ | ||
| 26 | |||
| 27 | #include "parser.h" | ||
| 28 | #include "adts_header.h" | ||
| 29 | #include "adts_parser.h" | ||
| 30 | #include "mpeg4audio.h" | ||
| 31 | |||
| 32 | typedef struct FTRParseContext { | ||
| 33 | ParseContext pc; | ||
| 34 | int skip; | ||
| 35 | int split; | ||
| 36 | int frame_index; | ||
| 37 | } FTRParseContext; | ||
| 38 | |||
| 39 | ✗ | static int ftr_parse(AVCodecParserContext *s, AVCodecContext *avctx, | |
| 40 | const uint8_t **poutbuf, int *poutbuf_size, | ||
| 41 | const uint8_t *buf, int buf_size) | ||
| 42 | { | ||
| 43 | uint8_t tmp[8 + AV_INPUT_BUFFER_PADDING_SIZE]; | ||
| 44 | ✗ | FTRParseContext *ftr = s->priv_data; | |
| 45 | ✗ | uint64_t state = ftr->pc.state64; | |
| 46 | ✗ | int next = END_NOT_FOUND; | |
| 47 | AACADTSHeaderInfo hdr; | ||
| 48 | int size; | ||
| 49 | |||
| 50 | ✗ | *poutbuf_size = 0; | |
| 51 | ✗ | *poutbuf = NULL; | |
| 52 | |||
| 53 | ✗ | if (s->flags & PARSER_FLAG_COMPLETE_FRAMES) { | |
| 54 | ✗ | next = buf_size; | |
| 55 | } else { | ||
| 56 | ✗ | for (int i = 0; i < buf_size; i++) { | |
| 57 | ✗ | if (ftr->skip > 0) { | |
| 58 | ✗ | ftr->skip--; | |
| 59 | ✗ | if (ftr->skip == 0 && ftr->split) { | |
| 60 | ✗ | ftr->split = 0; | |
| 61 | ✗ | next = i; | |
| 62 | ✗ | s->duration = 1024; | |
| 63 | ✗ | s->key_frame = 1; | |
| 64 | ✗ | break; | |
| 65 | ✗ | } else if (ftr->skip > 0) { | |
| 66 | ✗ | continue; | |
| 67 | } | ||
| 68 | } | ||
| 69 | |||
| 70 | ✗ | state = (state << 8) | buf[i]; | |
| 71 | ✗ | AV_WB64(tmp, state); | |
| 72 | ✗ | size = ff_adts_header_parse_buf(tmp + 8 - AV_AAC_ADTS_HEADER_SIZE, &hdr); | |
| 73 | |||
| 74 | ✗ | if (size > 0) { | |
| 75 | ✗ | ftr->skip = size - 6; | |
| 76 | ✗ | ftr->frame_index += ff_mpeg4audio_channels[hdr.chan_config]; | |
| 77 | ✗ | if (ftr->frame_index >= avctx->ch_layout.nb_channels) { | |
| 78 | ✗ | ftr->frame_index = 0; | |
| 79 | ✗ | ftr->split = 1; | |
| 80 | } | ||
| 81 | } | ||
| 82 | } | ||
| 83 | |||
| 84 | ✗ | ftr->pc.state64 = state; | |
| 85 | |||
| 86 | ✗ | if (ff_combine_frame(&ftr->pc, next, &buf, &buf_size) < 0) { | |
| 87 | ✗ | *poutbuf = NULL; | |
| 88 | ✗ | *poutbuf_size = 0; | |
| 89 | ✗ | return buf_size; | |
| 90 | } | ||
| 91 | } | ||
| 92 | |||
| 93 | ✗ | *poutbuf = buf; | |
| 94 | ✗ | *poutbuf_size = buf_size; | |
| 95 | |||
| 96 | ✗ | return next; | |
| 97 | } | ||
| 98 | |||
| 99 | const AVCodecParser ff_ftr_parser = { | ||
| 100 | .codec_ids = { AV_CODEC_ID_FTR }, | ||
| 101 | .priv_data_size = sizeof(FTRParseContext), | ||
| 102 | .parser_parse = ftr_parse, | ||
| 103 | .parser_close = ff_parse_close, | ||
| 104 | }; | ||
| 105 |