| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * VAG demuxer | ||
| 3 | * Copyright (c) 2015 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 | #include "libavutil/channel_layout.h" | ||
| 23 | #include "avformat.h" | ||
| 24 | #include "demux.h" | ||
| 25 | #include "internal.h" | ||
| 26 | |||
| 27 | 7186 | static int vag_probe(const AVProbeData *p) | |
| 28 | { | ||
| 29 |
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7186 | if (memcmp(p->buf, "VAGp\0\0\0", 7)) |
| 30 | 7186 | return 0; | |
| 31 | |||
| 32 | ✗ | return AVPROBE_SCORE_MAX; | |
| 33 | } | ||
| 34 | |||
| 35 | ✗ | static int vag_read_header(AVFormatContext *s) | |
| 36 | { | ||
| 37 | AVStream *st; | ||
| 38 | |||
| 39 | ✗ | st = avformat_new_stream(s, NULL); | |
| 40 | ✗ | if (!st) | |
| 41 | ✗ | return AVERROR(ENOMEM); | |
| 42 | |||
| 43 | ✗ | avio_skip(s->pb, 4); | |
| 44 | ✗ | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; | |
| 45 | ✗ | st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX; | |
| 46 | ✗ | st->codecpar->ch_layout.nb_channels = 1 + (avio_rb32(s->pb) == 0x00000004); | |
| 47 | ✗ | avio_skip(s->pb, 4); | |
| 48 | ✗ | if (st->codecpar->ch_layout.nb_channels > 1) { | |
| 49 | ✗ | st->duration = avio_rb32(s->pb); | |
| 50 | } else { | ||
| 51 | ✗ | st->duration = avio_rb32(s->pb) / 16 * 28; | |
| 52 | } | ||
| 53 | ✗ | st->codecpar->sample_rate = avio_rb32(s->pb); | |
| 54 | ✗ | if (st->codecpar->sample_rate <= 0) | |
| 55 | ✗ | return AVERROR_INVALIDDATA; | |
| 56 | ✗ | avio_seek(s->pb, 0x1000, SEEK_SET); | |
| 57 | ✗ | if (avio_rl32(s->pb) == MKTAG('V','A','G','p')) { | |
| 58 | ✗ | st->codecpar->block_align = 0x1000 * st->codecpar->ch_layout.nb_channels; | |
| 59 | ✗ | avio_seek(s->pb, 0, SEEK_SET); | |
| 60 | ✗ | st->duration = st->duration / 16 * 28; | |
| 61 | } else { | ||
| 62 | ✗ | st->codecpar->block_align = 16 * st->codecpar->ch_layout.nb_channels; | |
| 63 | ✗ | avio_seek(s->pb, st->codecpar->ch_layout.nb_channels > 1 ? 0x80 : 0x30, SEEK_SET); | |
| 64 | } | ||
| 65 | ✗ | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); | |
| 66 | |||
| 67 | ✗ | return 0; | |
| 68 | } | ||
| 69 | |||
| 70 | ✗ | static int vag_read_packet(AVFormatContext *s, AVPacket *pkt) | |
| 71 | { | ||
| 72 | ✗ | AVCodecParameters *par = s->streams[0]->codecpar; | |
| 73 | |||
| 74 | ✗ | return av_get_packet(s->pb, pkt, par->block_align); | |
| 75 | } | ||
| 76 | |||
| 77 | const FFInputFormat ff_vag_demuxer = { | ||
| 78 | .p.name = "vag", | ||
| 79 | .p.long_name = NULL_IF_CONFIG_SMALL("Sony PS2 VAG"), | ||
| 80 | .p.extensions = "vag", | ||
| 81 | .read_probe = vag_probe, | ||
| 82 | .read_header = vag_read_header, | ||
| 83 | .read_packet = vag_read_packet, | ||
| 84 | }; | ||
| 85 |