/* * ADS/SS2 demuxer * Copyright (c) 2015 Paul B Mahol * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/channel_layout.h"#include "avformat.h"#include "demux.h"#include "internal.h" static int ads_probe(const AVProbeData *p){    if (memcmp(p->buf, "SShd", 4) ||        memcmp(p->buf+32, "SSbd", 4))        return 0;     return AVPROBE_SCORE_MAX / 3 * 2;} static int ads_read_header(AVFormatContext *s){    int align, codec;    AVStream *st;    int64_t size;     st = avformat_new_stream(s, NULL);    if (!st)        return AVERROR(ENOMEM);     avio_skip(s->pb, 8);    st->codecpar->codec_type  = AVMEDIA_TYPE_AUDIO;    codec                  = avio_rl32(s->pb);    st->codecpar->sample_rate = avio_rl32(s->pb);    if (st->codecpar->sample_rate <= 0)        return AVERROR_INVALIDDATA;    st->codecpar->ch_layout.nb_channels = avio_rl32(s->pb);    if (st->codecpar->ch_layout.nb_channels <= 0)        return AVERROR_INVALIDDATA;    align                  = avio_rl32(s->pb);    if (align <= 0 || align > INT_MAX / st->codecpar->ch_layout.nb_channels)        return AVERROR_INVALIDDATA;     if (codec == 1)        st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE_PLANAR;    else        st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX;     st->codecpar->block_align = st->codecpar->ch_layout.nb_channels * align;    avio_skip(s->pb, 12);    size = avio_rl32(s->pb);    if (st->codecpar->codec_id == AV_CODEC_ID_ADPCM_PSX && size >= 0x40)        st->duration = (size - 0x40) / 16 / st->codecpar->ch_layout.nb_channels * 28;    avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);     return 0;} static int ads_read_packet(AVFormatContext *s, AVPacket *pkt){    AVCodecParameters *par = s->streams[0]->codecpar;    int ret;     ret = av_get_packet(s->pb, pkt, par->block_align);    pkt->stream_index = 0;    return ret;} const FFInputFormat ff_ads_demuxer = {    .p.name         = "ads",    .p.long_name    = NULL_IF_CONFIG_SMALL("Sony PS2 ADS"),    .p.extensions   = "ads,ss2",    .read_probe     = ads_probe,    .read_header    = ads_read_header,    .read_packet    = ads_read_packet,};