blob: 73ea7c7d54b8c46d9a3b4d7f43c1dcd85be4e59e
| 1 | /* |
| 2 | * ADS/SS2 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 "internal.h" |
| 25 | |
| 26 | static int ads_probe(AVProbeData *p) |
| 27 | { |
| 28 | if (memcmp(p->buf, "SShd", 4) || |
| 29 | memcmp(p->buf+32, "SSbd", 4)) |
| 30 | return 0; |
| 31 | |
| 32 | return AVPROBE_SCORE_MAX / 3 * 2; |
| 33 | } |
| 34 | |
| 35 | static int ads_read_header(AVFormatContext *s) |
| 36 | { |
| 37 | int align, codec, size; |
| 38 | AVStream *st; |
| 39 | |
| 40 | st = avformat_new_stream(s, NULL); |
| 41 | if (!st) |
| 42 | return AVERROR(ENOMEM); |
| 43 | |
| 44 | avio_skip(s->pb, 8); |
| 45 | st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
| 46 | codec = avio_rl32(s->pb); |
| 47 | st->codecpar->sample_rate = avio_rl32(s->pb); |
| 48 | if (st->codecpar->sample_rate <= 0) |
| 49 | return AVERROR_INVALIDDATA; |
| 50 | st->codecpar->channels = avio_rl32(s->pb); |
| 51 | if (st->codecpar->channels <= 0) |
| 52 | return AVERROR_INVALIDDATA; |
| 53 | align = avio_rl32(s->pb); |
| 54 | if (align <= 0 || align > INT_MAX / st->codecpar->channels) |
| 55 | return AVERROR_INVALIDDATA; |
| 56 | |
| 57 | if (codec == 1) |
| 58 | st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE_PLANAR; |
| 59 | else |
| 60 | st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX; |
| 61 | |
| 62 | st->codecpar->block_align = st->codecpar->channels * align; |
| 63 | avio_skip(s->pb, 12); |
| 64 | size = avio_rl32(s->pb); |
| 65 | if (st->codecpar->codec_id == AV_CODEC_ID_ADPCM_PSX) |
| 66 | st->duration = (size - 0x40) / 16 / st->codecpar->channels * 28; |
| 67 | avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
| 68 | |
| 69 | return 0; |
| 70 | } |
| 71 | |
| 72 | static int ads_read_packet(AVFormatContext *s, AVPacket *pkt) |
| 73 | { |
| 74 | AVCodecParameters *par = s->streams[0]->codecpar; |
| 75 | int ret; |
| 76 | |
| 77 | ret = av_get_packet(s->pb, pkt, par->block_align); |
| 78 | pkt->stream_index = 0; |
| 79 | return ret; |
| 80 | } |
| 81 | |
| 82 | AVInputFormat ff_ads_demuxer = { |
| 83 | .name = "ads", |
| 84 | .long_name = NULL_IF_CONFIG_SMALL("Sony PS2 ADS"), |
| 85 | .read_probe = ads_probe, |
| 86 | .read_header = ads_read_header, |
| 87 | .read_packet = ads_read_packet, |
| 88 | .extensions = "ads,ss2", |
| 89 | }; |
| 90 |