| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Black ops audio demuxer | ||
| 3 | * Copyright (c) 2013 Michael Niedermayer | ||
| 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 | #include "libavutil/intreadwrite.h" | ||
| 23 | #include "libavcodec/internal.h" | ||
| 24 | #include "avformat.h" | ||
| 25 | #include "demux.h" | ||
| 26 | #include "internal.h" | ||
| 27 | |||
| 28 | 7186 | static int probe(const AVProbeData *p) | |
| 29 | { | ||
| 30 |
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7186 | if (p->buf_size < 2096) |
| 31 | 3985 | return 0; | |
| 32 |
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3201 | if ( AV_RL32(p->buf ) != 1 |
| 33 |
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8 | || AV_RL32(p->buf + 8) > 100000 |
| 34 |
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8 | || AV_RL32(p->buf + 12) > 8 |
| 35 | ✗ | || AV_RL32(p->buf + 16) != 2096 | |
| 36 | ✗ | ||!AV_RL32(p->buf + 21) | |
| 37 | ✗ | || AV_RL16(p->buf + 25) != 2096 | |
| 38 | ✗ | || AV_RL32(p->buf + 48) % AV_RL32(p->buf + 21) | |
| 39 | ) | ||
| 40 | 3201 | return 0; | |
| 41 | ✗ | return AVPROBE_SCORE_EXTENSION; | |
| 42 | } | ||
| 43 | |||
| 44 | |||
| 45 | ✗ | static int read_header(AVFormatContext *s) | |
| 46 | { | ||
| 47 | ✗ | AVStream *st = avformat_new_stream(s, NULL); | |
| 48 | uint32_t data_offset; | ||
| 49 | |||
| 50 | ✗ | if (!st) | |
| 51 | ✗ | return AVERROR(ENOMEM); | |
| 52 | |||
| 53 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 54 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_ADPCM_MS; | |
| 55 | |||
| 56 | ✗ | avio_rl32(s->pb); | |
| 57 | ✗ | avio_rl32(s->pb); | |
| 58 | ✗ | st->codecpar->sample_rate = avio_rl32(s->pb); | |
| 59 | ✗ | st->codecpar->ch_layout.nb_channels = avio_rl32(s->pb); | |
| 60 | ✗ | if (st->codecpar->ch_layout.nb_channels > FF_SANE_NB_CHANNELS || | |
| 61 | ✗ | st->codecpar->ch_layout.nb_channels <= 0) | |
| 62 | ✗ | return AVERROR(ENOSYS); | |
| 63 | ✗ | ffformatcontext(s)->data_offset = data_offset = avio_rl32(s->pb); | |
| 64 | ✗ | avio_r8(s->pb); | |
| 65 | ✗ | st->codecpar->block_align = avio_rl32(s->pb); | |
| 66 | ✗ | if (st->codecpar->block_align > INT_MAX / FF_SANE_NB_CHANNELS || st->codecpar->block_align <= 0) | |
| 67 | ✗ | return AVERROR_INVALIDDATA; | |
| 68 | ✗ | st->codecpar->block_align *= st->codecpar->ch_layout.nb_channels; | |
| 69 | |||
| 70 | ✗ | avio_seek(s->pb, data_offset, SEEK_SET); | |
| 71 | |||
| 72 | ✗ | return 0; | |
| 73 | } | ||
| 74 | |||
| 75 | ✗ | static int read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 76 | { | ||
| 77 | ✗ | AVStream *st = s->streams[0]; | |
| 78 | |||
| 79 | ✗ | return av_get_packet(s->pb, pkt, st->codecpar->block_align); | |
| 80 | } | ||
| 81 | |||
| 82 | const FFInputFormat ff_boa_demuxer = { | ||
| 83 | .p.name = "boa", | ||
| 84 | .p.long_name = NULL_IF_CONFIG_SMALL("Black Ops Audio"), | ||
| 85 | .p.flags = AVFMT_GENERIC_INDEX, | ||
| 86 | .read_probe = probe, | ||
| 87 | .read_header = read_header, | ||
| 88 | .read_packet = read_packet, | ||
| 89 | }; | ||
| 90 |