blob: 22e4f1e3c8748870bc89269ed87da0719001d76b
| 1 | /* |
| 2 | * XVAG 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/bswap.h" |
| 23 | #include "libavcodec/internal.h" |
| 24 | #include "avformat.h" |
| 25 | #include "internal.h" |
| 26 | |
| 27 | static int xvag_probe(AVProbeData *p) |
| 28 | { |
| 29 | if (memcmp(p->buf, "XVAG", 4) || |
| 30 | memcmp(p->buf+32, "fmat", 4)) |
| 31 | return 0; |
| 32 | |
| 33 | return AVPROBE_SCORE_MAX; |
| 34 | } |
| 35 | |
| 36 | static int xvag_read_header(AVFormatContext *s) |
| 37 | { |
| 38 | unsigned offset, big_endian, codec; |
| 39 | AVStream *st; |
| 40 | |
| 41 | avio_skip(s->pb, 4); |
| 42 | |
| 43 | st = avformat_new_stream(s, NULL); |
| 44 | if (!st) |
| 45 | return AVERROR(ENOMEM); |
| 46 | |
| 47 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
| 48 | |
| 49 | offset = avio_rl32(s->pb); |
| 50 | big_endian = offset > av_bswap32(offset); |
| 51 | if (big_endian) { |
| 52 | offset = av_bswap32(offset); |
| 53 | avio_skip(s->pb, 28); |
| 54 | codec = avio_rb32(s->pb); |
| 55 | st->codecpar->channels = avio_rb32(s->pb); |
| 56 | avio_skip(s->pb, 4); |
| 57 | st->duration = avio_rb32(s->pb); |
| 58 | avio_skip(s->pb, 8); |
| 59 | st->codecpar->sample_rate = avio_rb32(s->pb); |
| 60 | } else { |
| 61 | avio_skip(s->pb, 28); |
| 62 | codec = avio_rl32(s->pb); |
| 63 | st->codecpar->channels = avio_rl32(s->pb); |
| 64 | avio_skip(s->pb, 4); |
| 65 | st->duration = avio_rl32(s->pb); |
| 66 | avio_skip(s->pb, 8); |
| 67 | st->codecpar->sample_rate = avio_rl32(s->pb); |
| 68 | } |
| 69 | |
| 70 | if (st->codecpar->sample_rate <= 0) |
| 71 | return AVERROR_INVALIDDATA; |
| 72 | if (st->codecpar->channels <= 0 || st->codecpar->channels > FF_SANE_NB_CHANNELS) |
| 73 | return AVERROR_INVALIDDATA; |
| 74 | |
| 75 | switch (codec) { |
| 76 | case 0x1c: |
| 77 | st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX; |
| 78 | st->codecpar->block_align = 16 * st->codecpar->channels; |
| 79 | break; |
| 80 | default: |
| 81 | avpriv_request_sample(s, "codec %X", codec); |
| 82 | return AVERROR_PATCHWELCOME; |
| 83 | }; |
| 84 | |
| 85 | avio_skip(s->pb, offset - avio_tell(s->pb)); |
| 86 | |
| 87 | if (avio_rb16(s->pb) == 0xFFFB) { |
| 88 | st->codecpar->codec_id = AV_CODEC_ID_MP3; |
| 89 | st->codecpar->block_align = 0x1000; |
| 90 | st->need_parsing = AVSTREAM_PARSE_FULL_RAW; |
| 91 | } |
| 92 | |
| 93 | avio_skip(s->pb, -2); |
| 94 | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
| 95 | |
| 96 | return 0; |
| 97 | } |
| 98 | |
| 99 | static int xvag_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 100 | { |
| 101 | AVCodecParameters *par = s->streams[0]->codecpar; |
| 102 | |
| 103 | return av_get_packet(s->pb, pkt, par->block_align); |
| 104 | } |
| 105 | |
| 106 | AVInputFormat ff_xvag_demuxer = { |
| 107 | .name = "xvag", |
| 108 | .long_name = NULL_IF_CONFIG_SMALL("Sony PS3 XVAG"), |
| 109 | .read_probe = xvag_probe, |
| 110 | .read_header = xvag_read_header, |
| 111 | .read_packet = xvag_read_packet, |
| 112 | .extensions = "xvag", |
| 113 | }; |
| 114 |