From 6f3ba23ae0d4c923823adb6fe5b4513fa3924354 Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Fri, 23 Oct 2015 12:03:28 +0200 Subject: avformat: add xvag demuxer Signed-off-by: Paul B Mahol --- libavformat/xvag.c | 112 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 112 insertions(+) create mode 100644 libavformat/xvag.c (limited to 'libavformat/xvag.c') diff --git a/libavformat/xvag.c b/libavformat/xvag.c new file mode 100644 index 0000000000..92c80a48e8 --- /dev/null +++ b/libavformat/xvag.c @@ -0,0 +1,112 @@ +/* + * XVAG 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/bswap.h" +#include "avformat.h" +#include "internal.h" + +static int xvag_probe(AVProbeData *p) +{ + if (memcmp(p->buf, "XVAG", 4) || + memcmp(p->buf+32, "fmat", 4)) + return 0; + + return AVPROBE_SCORE_MAX; +} + +static int xvag_read_header(AVFormatContext *s) +{ + unsigned offset, big_endian, codec; + AVStream *st; + + avio_skip(s->pb, 4); + + st = avformat_new_stream(s, NULL); + if (!st) + return AVERROR(ENOMEM); + + st->codec->codec_type = AVMEDIA_TYPE_AUDIO; + + offset = avio_rl32(s->pb); + big_endian = offset > av_bswap32(offset); + if (big_endian) { + offset = av_bswap32(offset); + avio_skip(s->pb, 28); + codec = avio_rb32(s->pb); + st->codec->channels = avio_rb32(s->pb); + avio_skip(s->pb, 4); + st->duration = avio_rb32(s->pb); + avio_skip(s->pb, 8); + st->codec->sample_rate = avio_rb32(s->pb); + } else { + avio_skip(s->pb, 28); + codec = avio_rl32(s->pb); + st->codec->channels = avio_rl32(s->pb); + avio_skip(s->pb, 4); + st->duration = avio_rl32(s->pb); + avio_skip(s->pb, 8); + st->codec->sample_rate = avio_rl32(s->pb); + } + + if (st->codec->sample_rate <= 0) + return AVERROR_INVALIDDATA; + if (st->codec->channels <= 0) + return AVERROR_INVALIDDATA; + + switch (codec) { + case 0x1c: + st->codec->codec_id = AV_CODEC_ID_ADPCM_PSX; + st->codec->block_align = 16 * st->codec->channels; + break; + default: + avpriv_request_sample(s, "codec %X", codec); + return AVERROR_PATCHWELCOME; + }; + + avio_skip(s->pb, offset - avio_tell(s->pb)); + + if (avio_rb16(s->pb) == 0xFFFB) { + st->codec->codec_id = AV_CODEC_ID_MP3; + st->codec->block_align = 0x1000; + st->need_parsing = AVSTREAM_PARSE_FULL_RAW; + } + + avio_skip(s->pb, -2); + avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); + + return 0; +} + +static int xvag_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + AVCodecContext *codec = s->streams[0]->codec; + + return av_get_packet(s->pb, pkt, codec->block_align); +} + +AVInputFormat ff_xvag_demuxer = { + .name = "xvag", + .long_name = NULL_IF_CONFIG_SMALL("Sony PS3 XVAG"), + .read_probe = xvag_probe, + .read_header = xvag_read_header, + .read_packet = xvag_read_packet, + .extensions = "xvag", +}; -- cgit v1.2.3