| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2018 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 "get_bits.h" | ||
| 24 | #include "ac3_parser_internal.h" | ||
| 25 | |||
| 26 | 315 | static int eac3_core_filter(AVBSFContext *ctx, AVPacket *pkt) | |
| 27 | { | ||
| 28 | AC3HeaderInfo hdr; | ||
| 29 | GetBitContext gbc; | ||
| 30 | int ret; | ||
| 31 | |||
| 32 | 315 | ret = ff_bsf_get_packet_ref(ctx, pkt); | |
| 33 |
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315 | if (ret < 0) |
| 34 | 158 | return ret; | |
| 35 | 157 | ret = init_get_bits8(&gbc, pkt->data, pkt->size); | |
| 36 |
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157 | if (ret < 0) |
| 37 | ✗ | goto fail; | |
| 38 | |||
| 39 | 157 | ret = ff_ac3_parse_header(&gbc, &hdr); | |
| 40 |
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157 | if (ret < 0) { |
| 41 | ✗ | ret = AVERROR_INVALIDDATA; | |
| 42 | ✗ | goto fail; | |
| 43 | } | ||
| 44 | |||
| 45 |
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157 | if (hdr.frame_type == EAC3_FRAME_TYPE_INDEPENDENT || |
| 46 |
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157 | hdr.frame_type == EAC3_FRAME_TYPE_AC3_CONVERT) { |
| 47 | 157 | pkt->size = FFMIN(hdr.frame_size, pkt->size); | |
| 48 | ✗ | } else if (hdr.frame_type == EAC3_FRAME_TYPE_DEPENDENT && pkt->size > hdr.frame_size) { | |
| 49 | AC3HeaderInfo hdr2; | ||
| 50 | |||
| 51 | ✗ | ret = init_get_bits8(&gbc, pkt->data + hdr.frame_size, pkt->size - hdr.frame_size); | |
| 52 | ✗ | if (ret < 0) | |
| 53 | ✗ | goto fail; | |
| 54 | |||
| 55 | ✗ | ret = ff_ac3_parse_header(&gbc, &hdr2); | |
| 56 | ✗ | if (ret < 0) { | |
| 57 | ✗ | ret = AVERROR_INVALIDDATA; | |
| 58 | ✗ | goto fail; | |
| 59 | } | ||
| 60 | |||
| 61 | ✗ | if (hdr2.frame_type == EAC3_FRAME_TYPE_INDEPENDENT || | |
| 62 | ✗ | hdr2.frame_type == EAC3_FRAME_TYPE_AC3_CONVERT) { | |
| 63 | ✗ | pkt->size -= hdr.frame_size; | |
| 64 | ✗ | pkt->data += hdr.frame_size; | |
| 65 | } else { | ||
| 66 | ✗ | pkt->size = 0; | |
| 67 | } | ||
| 68 | } else { | ||
| 69 | ✗ | pkt->size = 0; | |
| 70 | } | ||
| 71 | |||
| 72 | 157 | return 0; | |
| 73 | ✗ | fail: | |
| 74 | ✗ | av_packet_unref(pkt); | |
| 75 | ✗ | return ret; | |
| 76 | } | ||
| 77 | |||
| 78 | static const enum AVCodecID codec_ids[] = { | ||
| 79 | AV_CODEC_ID_EAC3, AV_CODEC_ID_NONE, | ||
| 80 | }; | ||
| 81 | |||
| 82 | const FFBitStreamFilter ff_eac3_core_bsf = { | ||
| 83 | .p.name = "eac3_core", | ||
| 84 | .p.codec_ids = codec_ids, | ||
| 85 | .filter = eac3_core_filter, | ||
| 86 | }; | ||
| 87 |