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115 lines
3.4 KiB
115 lines
3.4 KiB
/* |
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* XVAG 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/bswap.h" |
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#include "libavcodec/internal.h" |
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#include "avformat.h" |
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#include "demux.h" |
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#include "internal.h" |
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static int xvag_probe(const AVProbeData *p) |
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{ |
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if (memcmp(p->buf, "XVAG", 4) || |
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memcmp(p->buf+32, "fmat", 4)) |
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return 0; |
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return AVPROBE_SCORE_MAX; |
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} |
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static int xvag_read_header(AVFormatContext *s) |
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{ |
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unsigned offset, big_endian, codec; |
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AVStream *st; |
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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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offset = avio_rl32(s->pb); |
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big_endian = offset > av_bswap32(offset); |
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if (big_endian) { |
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offset = av_bswap32(offset); |
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avio_skip(s->pb, 28); |
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codec = avio_rb32(s->pb); |
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st->codecpar->ch_layout.nb_channels = avio_rb32(s->pb); |
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avio_skip(s->pb, 4); |
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st->duration = avio_rb32(s->pb); |
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avio_skip(s->pb, 8); |
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st->codecpar->sample_rate = avio_rb32(s->pb); |
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} else { |
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avio_skip(s->pb, 28); |
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codec = avio_rl32(s->pb); |
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st->codecpar->ch_layout.nb_channels = avio_rl32(s->pb); |
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avio_skip(s->pb, 4); |
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st->duration = avio_rl32(s->pb); |
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avio_skip(s->pb, 8); |
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st->codecpar->sample_rate = avio_rl32(s->pb); |
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} |
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if (st->codecpar->sample_rate <= 0) |
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return AVERROR_INVALIDDATA; |
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if (st->codecpar->ch_layout.nb_channels <= 0 || |
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st->codecpar->ch_layout.nb_channels > FF_SANE_NB_CHANNELS) |
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return AVERROR_INVALIDDATA; |
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switch (codec) { |
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case 0x1c: |
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st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX; |
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st->codecpar->block_align = 16 * st->codecpar->ch_layout.nb_channels; |
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break; |
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default: |
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avpriv_request_sample(s, "codec %X", codec); |
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return AVERROR_PATCHWELCOME; |
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}; |
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avio_skip(s->pb, offset - avio_tell(s->pb)); |
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if (avio_rb16(s->pb) == 0xFFFB) { |
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st->codecpar->codec_id = AV_CODEC_ID_MP3; |
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st->codecpar->block_align = 0x1000; |
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ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW; |
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} |
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avio_skip(s->pb, -2); |
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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 xvag_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); |
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} |
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const FFInputFormat ff_xvag_demuxer = { |
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.p.name = "xvag", |
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.p.long_name = NULL_IF_CONFIG_SMALL("Sony PS3 XVAG"), |
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.p.extensions = "xvag", |
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.read_probe = xvag_probe, |
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.read_header = xvag_read_header, |
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.read_packet = xvag_read_packet, |
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};
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