| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2016 Paul B Mahol | ||
| 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 | #include "bsf.h" | ||
| 22 | #include "bsf_internal.h" | ||
| 23 | #include "bytestream.h" | ||
| 24 | #include "dca_syncwords.h" | ||
| 25 | |||
| 26 | 2345 | static int dca_core_filter(AVBSFContext *ctx, AVPacket *pkt) | |
| 27 | { | ||
| 28 | GetByteContext gb; | ||
| 29 | uint32_t syncword; | ||
| 30 | 2345 | int core_size = 0, ret; | |
| 31 | |||
| 32 | 2345 | ret = ff_bsf_get_packet_ref(ctx, pkt); | |
| 33 |
2/2✓ Branch 0 taken 1173 times.
✓ Branch 1 taken 1172 times.
|
2345 | if (ret < 0) |
| 34 | 1173 | return ret; | |
| 35 | |||
| 36 | 1172 | bytestream2_init(&gb, pkt->data, pkt->size); | |
| 37 | 1172 | syncword = bytestream2_get_be32(&gb); | |
| 38 | 1172 | bytestream2_skip(&gb, 1); | |
| 39 | |||
| 40 |
1/2✓ Branch 0 taken 1172 times.
✗ Branch 1 not taken.
|
1172 | switch (syncword) { |
| 41 | 1172 | case DCA_SYNCWORD_CORE_BE: | |
| 42 | 1172 | core_size = ((bytestream2_get_be24(&gb) >> 4) & 0x3fff) + 1; | |
| 43 | 1172 | break; | |
| 44 | } | ||
| 45 | |||
| 46 |
2/4✓ Branch 0 taken 1172 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 1172 times.
✗ Branch 3 not taken.
|
1172 | if (core_size > 0 && core_size <= pkt->size) { |
| 47 | 1172 | pkt->size = core_size; | |
| 48 | } | ||
| 49 | |||
| 50 | 1172 | return 0; | |
| 51 | } | ||
| 52 | |||
| 53 | static const enum AVCodecID codec_ids[] = { | ||
| 54 | AV_CODEC_ID_DTS, AV_CODEC_ID_NONE, | ||
| 55 | }; | ||
| 56 | |||
| 57 | const FFBitStreamFilter ff_dca_core_bsf = { | ||
| 58 | .p.name = "dca_core", | ||
| 59 | .p.codec_ids = codec_ids, | ||
| 60 | .filter = dca_core_filter, | ||
| 61 | }; | ||
| 62 |