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110 lines
3.6 KiB
110 lines
3.6 KiB
/* |
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* MSF demuxer |
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* Copyright (c) 2015 Paul B Mahol |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/intreadwrite.h" |
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#include "avformat.h" |
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#include "internal.h" |
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static int msf_probe(AVProbeData *p) |
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{ |
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if (memcmp(p->buf, "MSF", 3)) |
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return 0; |
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if (AV_RB32(p->buf+8) <= 0) |
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return 0; |
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if (AV_RB32(p->buf+16) <= 0) |
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return 0; |
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if (AV_RB32(p->buf+4) > 16) |
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return AVPROBE_SCORE_MAX / 5; //unsupported / unknown codec |
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return AVPROBE_SCORE_MAX / 3 * 2; |
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} |
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static int msf_read_header(AVFormatContext *s) |
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{ |
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unsigned codec, align, size; |
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AVStream *st; |
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int ret; |
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avio_skip(s->pb, 4); |
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st = avformat_new_stream(s, NULL); |
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if (!st) |
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return AVERROR(ENOMEM); |
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; |
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codec = avio_rb32(s->pb); |
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st->codecpar->channels = avio_rb32(s->pb); |
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if (st->codecpar->channels <= 0 || st->codecpar->channels >= INT_MAX / 1024) |
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return AVERROR_INVALIDDATA; |
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size = avio_rb32(s->pb); |
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st->codecpar->sample_rate = avio_rb32(s->pb); |
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if (st->codecpar->sample_rate <= 0) |
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return AVERROR_INVALIDDATA; |
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align = avio_rb32(s->pb) ; |
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if (align > INT_MAX / st->codecpar->channels) |
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return AVERROR_INVALIDDATA; |
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st->codecpar->block_align = align; |
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switch (codec) { |
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case 0: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE; break; |
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case 3: st->codecpar->block_align = 16 * st->codecpar->channels; |
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st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX; break; |
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case 4: |
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case 5: |
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case 6: st->codecpar->block_align = (codec == 4 ? 96 : codec == 5 ? 152 : 192) * st->codecpar->channels; |
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ret = ff_alloc_extradata(st->codecpar, 14); |
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if (ret < 0) |
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return ret; |
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memset(st->codecpar->extradata, 0, st->codecpar->extradata_size); |
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AV_WL16(st->codecpar->extradata, 1); |
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AV_WL16(st->codecpar->extradata+4, 4096); |
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AV_WL16(st->codecpar->extradata+10, 1); |
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st->codecpar->codec_id = AV_CODEC_ID_ATRAC3; break; |
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case 7: st->need_parsing = AVSTREAM_PARSE_FULL_RAW; |
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st->codecpar->codec_id = AV_CODEC_ID_MP3; break; |
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default: |
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avpriv_request_sample(s, "Codec %d", codec); |
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return AVERROR_PATCHWELCOME; |
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} |
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st->duration = av_get_audio_frame_duration2(st->codecpar, size); |
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avio_skip(s->pb, 0x40 - avio_tell(s->pb)); |
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avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); |
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return 0; |
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} |
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static int msf_read_packet(AVFormatContext *s, AVPacket *pkt) |
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{ |
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AVCodecParameters *par = s->streams[0]->codecpar; |
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return av_get_packet(s->pb, pkt, par->block_align ? par->block_align : 1024 * par->channels); |
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} |
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AVInputFormat ff_msf_demuxer = { |
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.name = "msf", |
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.long_name = NULL_IF_CONFIG_SMALL("Sony PS3 MSF"), |
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.read_probe = msf_probe, |
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.read_header = msf_read_header, |
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.read_packet = msf_read_packet, |
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.extensions = "msf", |
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};
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